1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2014 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "elf-linux-psinfo.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 2, /* size (0 = byte, 1 = short, 2 = long) */
191 32, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x3fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* The high order 16 bits of an address. */
264 HOWTO (R_PPC_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* The high order 16 bits of an address, plus 1 if the contents of
279 the low 16 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc_elf_addr16_ha_reloc, /* special_function */
288 "R_PPC_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_signed, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x3fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xfffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 bfd_elf_generic_reloc, /* special_function */
418 "R_PPC_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 bfd_elf_generic_reloc, /* special_function */
434 "R_PPC_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 bfd_elf_generic_reloc, /* special_function */
450 "R_PPC_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc_elf_addr16_ha_reloc, /* special_function */
466 "R_PPC_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC_REL24, but referring to the procedure linkage table
473 entry for the symbol. */
474 HOWTO (R_PPC_PLTREL24, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 26, /* bitsize */
478 TRUE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_signed, /* complain_on_overflow */
481 bfd_elf_generic_reloc, /* special_function */
482 "R_PPC_PLTREL24", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0x3fffffc, /* dst_mask */
486 TRUE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC_COPY, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 32, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 bfd_elf_generic_reloc, /* special_function */
501 "R_PPC_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC_ADDR32, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC_GLOB_DAT, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 bfd_elf_generic_reloc, /* special_function */
517 "R_PPC_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Marks a procedure linkage table entry for a symbol. */
524 HOWTO (R_PPC_JMP_SLOT, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 bfd_elf_generic_reloc, /* special_function */
532 "R_PPC_JMP_SLOT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Used only by the dynamic linker. When the object is run, this
539 longword is set to the load address of the object, plus the
540 addend. */
541 HOWTO (R_PPC_RELATIVE, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_RELATIVE", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC_REL24, but uses the value of the symbol within the
556 object rather than the final value. Normally used for
557 _GLOBAL_OFFSET_TABLE_. */
558 HOWTO (R_PPC_LOCAL24PC, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 26, /* bitsize */
562 TRUE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_LOCAL24PC", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0x3fffffc, /* dst_mask */
570 TRUE), /* pcrel_offset */
571
572 /* Like R_PPC_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative */
603 HOWTO (R_PPC_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table.
618 FIXME: not supported. */
619 HOWTO (R_PPC_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 bfd_elf_generic_reloc, /* special_function */
627 "R_PPC_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: not supported. */
635 HOWTO (R_PPC_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 bfd_elf_generic_reloc, /* special_function */
643 "R_PPC_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 "R_PPC_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_PPC_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc_elf_addr16_ha_reloc, /* special_function */
691 "R_PPC_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
698 small data items. */
699 HOWTO (R_PPC_SDAREL16, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_signed, /* complain_on_overflow */
706 bfd_elf_generic_reloc, /* special_function */
707 "R_PPC_SDAREL16", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit section relative relocation. */
714 HOWTO (R_PPC_SECTOFF, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_signed, /* complain_on_overflow */
721 bfd_elf_generic_reloc, /* special_function */
722 "R_PPC_SECTOFF", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit lower half section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_LO, /* type */
730 0, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 bfd_elf_generic_reloc, /* special_function */
737 "R_PPC_SECTOFF_LO", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half section relative relocation. */
744 HOWTO (R_PPC_SECTOFF_HI, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 bfd_elf_generic_reloc, /* special_function */
752 "R_PPC_SECTOFF_HI", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* 16-bit upper half adjusted section relative relocation. */
759 HOWTO (R_PPC_SECTOFF_HA, /* type */
760 16, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 ppc_elf_addr16_ha_reloc, /* special_function */
767 "R_PPC_SECTOFF_HA", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* Marker relocs for TLS. */
774 HOWTO (R_PPC_TLS,
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 32, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC_TLS", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 HOWTO (R_PPC_TLSGD,
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 32, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC_TLSGD", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 HOWTO (R_PPC_TLSLD,
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 32, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC_TLSLD", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 0, /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* Computes the load module index of the load module that contains the
817 definition of its TLS sym. */
818 HOWTO (R_PPC_DTPMOD32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPMOD32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* Computes a dtv-relative displacement, the difference between the value
833 of sym+add and the base address of the thread-local storage block that
834 contains the definition of sym, minus 0x8000. */
835 HOWTO (R_PPC_DTPREL32,
836 0, /* rightshift */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
838 32, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL32", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffffffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* A 16 bit dtprel reloc. */
850 HOWTO (R_PPC_DTPREL16,
851 0, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_signed, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Like DTPREL16, but no overflow. */
865 HOWTO (R_PPC_DTPREL16_LO,
866 0, /* rightshift */
867 1, /* size (0 = byte, 1 = short, 2 = long) */
868 16, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc_elf_unhandled_reloc, /* special_function */
873 "R_PPC_DTPREL16_LO", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 0xffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 /* Like DTPREL16_LO, but next higher group of 16 bits. */
880 HOWTO (R_PPC_DTPREL16_HI,
881 16, /* rightshift */
882 1, /* size (0 = byte, 1 = short, 2 = long) */
883 16, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc_elf_unhandled_reloc, /* special_function */
888 "R_PPC_DTPREL16_HI", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* Like DTPREL16_HI, but adjust for low 16 bits. */
895 HOWTO (R_PPC_DTPREL16_HA,
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 FALSE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 ppc_elf_unhandled_reloc, /* special_function */
903 "R_PPC_DTPREL16_HA", /* name */
904 FALSE, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
908
909 /* Computes a tp-relative displacement, the difference between the value of
910 sym+add and the value of the thread pointer (r13). */
911 HOWTO (R_PPC_TPREL32,
912 0, /* rightshift */
913 2, /* size (0 = byte, 1 = short, 2 = long) */
914 32, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL32", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffffffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* A 16 bit tprel reloc. */
926 HOWTO (R_PPC_TPREL16,
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Like TPREL16, but no overflow. */
941 HOWTO (R_PPC_TPREL16_LO,
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_dont, /* complain_on_overflow */
948 ppc_elf_unhandled_reloc, /* special_function */
949 "R_PPC_TPREL16_LO", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* Like TPREL16_LO, but next higher group of 16 bits. */
956 HOWTO (R_PPC_TPREL16_HI,
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc_elf_unhandled_reloc, /* special_function */
964 "R_PPC_TPREL16_HI", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* Like TPREL16_HI, but adjust for low 16 bits. */
971 HOWTO (R_PPC_TPREL16_HA,
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_TPREL16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
987 to the first entry. */
988 HOWTO (R_PPC_GOT_TLSGD16,
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like GOT_TLSGD16, but no overflow. */
1003 HOWTO (R_PPC_GOT_TLSGD16_LO,
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 ppc_elf_unhandled_reloc, /* special_function */
1011 "R_PPC_GOT_TLSGD16_LO", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1018 HOWTO (R_PPC_GOT_TLSGD16_HI,
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc_elf_unhandled_reloc, /* special_function */
1026 "R_PPC_GOT_TLSGD16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1033 HOWTO (R_PPC_GOT_TLSGD16_HA,
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSGD16_HA", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1048 with values (sym+add)@dtpmod and zero, and computes the offset to the
1049 first entry. */
1050 HOWTO (R_PPC_GOT_TLSLD16,
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_signed, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like GOT_TLSLD16, but no overflow. */
1065 HOWTO (R_PPC_GOT_TLSLD16_LO,
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc_elf_unhandled_reloc, /* special_function */
1073 "R_PPC_GOT_TLSLD16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1080 HOWTO (R_PPC_GOT_TLSLD16_HI,
1081 16, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc_elf_unhandled_reloc, /* special_function */
1088 "R_PPC_GOT_TLSLD16_HI", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1095 HOWTO (R_PPC_GOT_TLSLD16_HA,
1096 16, /* rightshift */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 ppc_elf_unhandled_reloc, /* special_function */
1103 "R_PPC_GOT_TLSLD16_HA", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1110 the offset to the entry. */
1111 HOWTO (R_PPC_GOT_DTPREL16,
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like GOT_DTPREL16, but no overflow. */
1126 HOWTO (R_PPC_GOT_DTPREL16_LO,
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc_elf_unhandled_reloc, /* special_function */
1134 "R_PPC_GOT_DTPREL16_LO", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1141 HOWTO (R_PPC_GOT_DTPREL16_HI,
1142 16, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc_elf_unhandled_reloc, /* special_function */
1149 "R_PPC_GOT_DTPREL16_HI", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xffff, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1156 HOWTO (R_PPC_GOT_DTPREL16_HA,
1157 16, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc_elf_unhandled_reloc, /* special_function */
1164 "R_PPC_GOT_DTPREL16_HA", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1171 offset to the entry. */
1172 HOWTO (R_PPC_GOT_TPREL16,
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_signed, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like GOT_TPREL16, but no overflow. */
1187 HOWTO (R_PPC_GOT_TPREL16_LO,
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc_elf_unhandled_reloc, /* special_function */
1195 "R_PPC_GOT_TPREL16_LO", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xffff, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1202 HOWTO (R_PPC_GOT_TPREL16_HI,
1203 16, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc_elf_unhandled_reloc, /* special_function */
1210 "R_PPC_GOT_TPREL16_HI", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xffff, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1217 HOWTO (R_PPC_GOT_TPREL16_HA,
1218 16, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc_elf_unhandled_reloc, /* special_function */
1225 "R_PPC_GOT_TPREL16_HA", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xffff, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* The remaining relocs are from the Embedded ELF ABI, and are not
1232 in the SVR4 ELF ABI. */
1233
1234 /* 32 bit value resulting from the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR32, /* type */
1236 0, /* rightshift */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1238 32, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 bfd_elf_generic_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* 16 bit value resulting from the addend minus the symbol. */
1250 HOWTO (R_PPC_EMB_NADDR16, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 bfd_elf_generic_reloc, /* special_function */
1258 "R_PPC_EMB_NADDR16", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* 16 bit value resulting from the addend minus the symbol. */
1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont,/* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 "R_PPC_EMB_ADDR16_LO", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* The high order 16 bits of the addend minus the symbol. */
1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 bfd_elf_generic_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HI", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* The high order 16 bits of the result of the addend minus the address,
1295 plus 1 if the contents of the low 16 bits, treated as a signed number,
1296 is negative. */
1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1298 16, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont, /* complain_on_overflow */
1304 ppc_elf_addr16_ha_reloc, /* special_function */
1305 "R_PPC_EMB_NADDR16_HA", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata section, and returning the offset from
1313 _SDA_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDAI16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 bfd_elf_generic_reloc, /* special_function */
1322 "R_PPC_EMB_SDAI16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* 16 bit value resulting from allocating a 4 byte word to hold an
1329 address in the .sdata2 section, and returning the offset from
1330 _SDA2_BASE_ for that relocation. */
1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_signed, /* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_PPC_EMB_SDA2I16", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1346 small data items. */
1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1348 0, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 bfd_elf_generic_reloc, /* special_function */
1355 "R_PPC_EMB_SDA2REL", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1362 signed offset from the appropriate base, and filling in the register
1363 field with the appropriate register (0, 2, or 13). */
1364 HOWTO (R_PPC_EMB_SDA21, /* type */
1365 0, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_signed, /* complain_on_overflow */
1371 bfd_elf_generic_reloc, /* special_function */
1372 "R_PPC_EMB_SDA21", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Relocation not handled: R_PPC_EMB_MRKREF */
1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1384
1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1386 in the 16 bit signed offset from the appropriate base, and filling in the
1387 register field with the appropriate register (0, 2, or 13). */
1388 HOWTO (R_PPC_EMB_RELSDA, /* type */
1389 0, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 bfd_elf_generic_reloc, /* special_function */
1396 "R_PPC_EMB_RELSDA", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* A relative 8 bit branch. */
1403 HOWTO (R_PPC_VLE_REL8, /* type */
1404 1, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 8, /* bitsize */
1407 TRUE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 bfd_elf_generic_reloc, /* special_function */
1411 "R_PPC_VLE_REL8", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xff, /* dst_mask */
1415 TRUE), /* pcrel_offset */
1416
1417 /* A relative 15 bit branch. */
1418 HOWTO (R_PPC_VLE_REL15, /* type */
1419 1, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1421 15, /* bitsize */
1422 TRUE, /* pc_relative */
1423 1, /* bitpos */
1424 complain_overflow_signed, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1426 "R_PPC_VLE_REL15", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xfe, /* dst_mask */
1430 TRUE), /* pcrel_offset */
1431
1432 /* A relative 24 bit branch. */
1433 HOWTO (R_PPC_VLE_REL24, /* type */
1434 1, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 24, /* bitsize */
1437 TRUE, /* pc_relative */
1438 1, /* bitpos */
1439 complain_overflow_signed, /* complain_on_overflow */
1440 bfd_elf_generic_reloc, /* special_function */
1441 "R_PPC_VLE_REL24", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0x1fffffe, /* dst_mask */
1445 TRUE), /* pcrel_offset */
1446
1447 /* The 16 LSBS in split16a format. */
1448 HOWTO (R_PPC_VLE_LO16A, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 bfd_elf_generic_reloc, /* special_function */
1456 "R_PPC_VLE_LO16A", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0x1f007ff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* The 16 LSBS in split16d format. */
1463 HOWTO (R_PPC_VLE_LO16D, /* type */
1464 0, /* rightshift */
1465 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 bfd_elf_generic_reloc, /* special_function */
1471 "R_PPC_VLE_LO16D", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0x1f07ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 bfd_elf_generic_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f007ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 bfd_elf_generic_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x1f07ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 bfd_elf_generic_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f007ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 bfd_elf_generic_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x1f07ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 bfd_elf_generic_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 bfd_elf_generic_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 bfd_elf_generic_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f007ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 bfd_elf_generic_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x1f07ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 bfd_elf_generic_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f007ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 bfd_elf_generic_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x1f07ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 bfd_elf_generic_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f007ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 bfd_elf_generic_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x1f07ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 HOWTO (R_PPC_IRELATIVE, /* type */
1660 0, /* rightshift */
1661 2, /* size (0 = byte, 1 = short, 2 = long) */
1662 32, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 bfd_elf_generic_reloc, /* special_function */
1667 "R_PPC_IRELATIVE", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffffffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* A 16 bit relative relocation. */
1674 HOWTO (R_PPC_REL16, /* type */
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 TRUE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_signed, /* complain_on_overflow */
1681 bfd_elf_generic_reloc, /* special_function */
1682 "R_PPC_REL16", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 TRUE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation without overflow. */
1689 HOWTO (R_PPC_REL16_LO, /* type */
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 TRUE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont,/* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16_LO", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* The high order 16 bits of a relative address. */
1704 HOWTO (R_PPC_REL16_HI, /* type */
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 TRUE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 bfd_elf_generic_reloc, /* special_function */
1712 "R_PPC_REL16_HI", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 TRUE), /* pcrel_offset */
1717
1718 /* The high order 16 bits of a relative address, plus 1 if the contents of
1719 the low 16 bits, treated as a signed number, is negative. */
1720 HOWTO (R_PPC_REL16_HA, /* type */
1721 16, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 TRUE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc_elf_addr16_ha_reloc, /* special_function */
1728 "R_PPC_REL16_HA", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xffff, /* dst_mask */
1732 TRUE), /* pcrel_offset */
1733
1734 /* GNU extension to record C++ vtable hierarchy. */
1735 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1736 0, /* rightshift */
1737 0, /* size (0 = byte, 1 = short, 2 = long) */
1738 0, /* bitsize */
1739 FALSE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_dont, /* complain_on_overflow */
1742 NULL, /* special_function */
1743 "R_PPC_GNU_VTINHERIT", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0, /* dst_mask */
1747 FALSE), /* pcrel_offset */
1748
1749 /* GNU extension to record C++ vtable member usage. */
1750 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1751 0, /* rightshift */
1752 0, /* size (0 = byte, 1 = short, 2 = long) */
1753 0, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_dont, /* complain_on_overflow */
1757 NULL, /* special_function */
1758 "R_PPC_GNU_VTENTRY", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* Phony reloc to handle AIX style TOC entries. */
1765 HOWTO (R_PPC_TOC16, /* type */
1766 0, /* rightshift */
1767 1, /* size (0 = byte, 1 = short, 2 = long) */
1768 16, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_signed, /* complain_on_overflow */
1772 bfd_elf_generic_reloc, /* special_function */
1773 "R_PPC_TOC16", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0xffff, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778 };
1779
1780 /* External 32-bit PPC structure for PRPSINFO. This structure is
1781 ABI-defined, thus we choose to use char arrays here in order to
1782 avoid dealing with different types in different architectures.
1783
1784 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1785 most non-PPC architectures use `short int'.
1786
1787 This structure will ultimately be written in the corefile's note
1788 section, as the PRPSINFO. */
1789
1790 struct elf_external_ppc_linux_prpsinfo32
1791 {
1792 char pr_state; /* Numeric process state. */
1793 char pr_sname; /* Char for pr_state. */
1794 char pr_zomb; /* Zombie. */
1795 char pr_nice; /* Nice val. */
1796 char pr_flag[4]; /* Flags. */
1797 char pr_uid[4];
1798 char pr_gid[4];
1799 char pr_pid[4];
1800 char pr_ppid[4];
1801 char pr_pgrp[4];
1802 char pr_sid[4];
1803 char pr_fname[16]; /* Filename of executable. */
1804 char pr_psargs[80]; /* Initial part of arg list. */
1805 };
1806
1807 /* Helper macro to swap (properly handling endianess) things from the
1808 `elf_internal_prpsinfo' structure to the `elf_external_ppc_prpsinfo32'
1809 structure.
1810
1811 Note that FROM should be a pointer, and TO should be the explicit type. */
1812
1813 #define PPC_LINUX_PRPSINFO32_SWAP_FIELDS(abfd, from, to) \
1814 do \
1815 { \
1816 H_PUT_8 (abfd, from->pr_state, &to.pr_state); \
1817 H_PUT_8 (abfd, from->pr_sname, &to.pr_sname); \
1818 H_PUT_8 (abfd, from->pr_zomb, &to.pr_zomb); \
1819 H_PUT_8 (abfd, from->pr_nice, &to.pr_nice); \
1820 H_PUT_32 (abfd, from->pr_flag, to.pr_flag); \
1821 H_PUT_32 (abfd, from->pr_uid, to.pr_uid); \
1822 H_PUT_32 (abfd, from->pr_gid, to.pr_gid); \
1823 H_PUT_32 (abfd, from->pr_pid, to.pr_pid); \
1824 H_PUT_32 (abfd, from->pr_ppid, to.pr_ppid); \
1825 H_PUT_32 (abfd, from->pr_pgrp, to.pr_pgrp); \
1826 H_PUT_32 (abfd, from->pr_sid, to.pr_sid); \
1827 strncpy (to.pr_fname, from->pr_fname, sizeof (to.pr_fname)); \
1828 strncpy (to.pr_psargs, from->pr_psargs, sizeof (to.pr_psargs)); \
1829 } while (0)
1830
1831
1832 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1833
1834 static void
ppc_elf_howto_init(void)1835 ppc_elf_howto_init (void)
1836 {
1837 unsigned int i, type;
1838
1839 for (i = 0;
1840 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1841 i++)
1842 {
1843 type = ppc_elf_howto_raw[i].type;
1844 if (type >= (sizeof (ppc_elf_howto_table)
1845 / sizeof (ppc_elf_howto_table[0])))
1846 abort ();
1847 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1848 }
1849 }
1850
1851 static reloc_howto_type *
ppc_elf_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)1852 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1853 bfd_reloc_code_real_type code)
1854 {
1855 enum elf_ppc_reloc_type r;
1856
1857 /* Initialize howto table if not already done. */
1858 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1859 ppc_elf_howto_init ();
1860
1861 switch (code)
1862 {
1863 default:
1864 return NULL;
1865
1866 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1867 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1868 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1869 case BFD_RELOC_PPC64_ADDR16_DS:
1870 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1871 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1872 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1873 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1874 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1875 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1876 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1877 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1878 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1879 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1880 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1881 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1882 case BFD_RELOC_PPC64_GOT16_DS:
1883 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1884 case BFD_RELOC_PPC64_GOT16_LO_DS:
1885 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1886 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1887 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1888 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1889 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1890 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1891 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1892 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1893 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1894 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1895 case BFD_RELOC_PPC64_PLT16_LO_DS:
1896 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1897 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1898 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1899 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1900 case BFD_RELOC_PPC64_SECTOFF_DS:
1901 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1902 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1903 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1904 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1905 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1906 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1907 case BFD_RELOC_PPC64_TOC16_DS:
1908 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1909 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1910 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1911 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1912 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1913 case BFD_RELOC_PPC64_TPREL16_DS:
1914 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1915 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1916 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1917 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1918 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1919 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1920 case BFD_RELOC_PPC64_DTPREL16_DS:
1921 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1922 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1923 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1924 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1925 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1926 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1927 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1928 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1929 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1930 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1931 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1932 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1933 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1934 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1935 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1936 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1937 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1938 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1939 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1940 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1941 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1942 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1943 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1944 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1945 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1946 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1947 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1948 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1949 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1950 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1951 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1952 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1953 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1954 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1955 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1956 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1957 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1958 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1959 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1960 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1961 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1962 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1963 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1964 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1965 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1966 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1967 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1968 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1969 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1970 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1971 r = R_PPC_VLE_SDAREL_LO16A;
1972 break;
1973 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1974 r = R_PPC_VLE_SDAREL_LO16D;
1975 break;
1976 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1977 r = R_PPC_VLE_SDAREL_HI16A;
1978 break;
1979 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1980 r = R_PPC_VLE_SDAREL_HI16D;
1981 break;
1982 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1983 r = R_PPC_VLE_SDAREL_HA16A;
1984 break;
1985 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1986 r = R_PPC_VLE_SDAREL_HA16D;
1987 break;
1988 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1989 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1990 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1991 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1992 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1993 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1994 }
1995
1996 return ppc_elf_howto_table[r];
1997 };
1998
1999 static reloc_howto_type *
ppc_elf_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)2000 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2001 const char *r_name)
2002 {
2003 unsigned int i;
2004
2005 for (i = 0;
2006 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2007 i++)
2008 if (ppc_elf_howto_raw[i].name != NULL
2009 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2010 return &ppc_elf_howto_raw[i];
2011
2012 return NULL;
2013 }
2014
2015 /* Set the howto pointer for a PowerPC ELF reloc. */
2016
2017 static void
ppc_elf_info_to_howto(bfd * abfd ATTRIBUTE_UNUSED,arelent * cache_ptr,Elf_Internal_Rela * dst)2018 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2019 arelent *cache_ptr,
2020 Elf_Internal_Rela *dst)
2021 {
2022 /* Initialize howto table if not already done. */
2023 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2024 ppc_elf_howto_init ();
2025
2026 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2027 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2028
2029 /* Just because the above assert didn't trigger doesn't mean that
2030 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2031 if (!cache_ptr->howto)
2032 {
2033 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2034 abfd, ELF32_R_TYPE (dst->r_info));
2035 bfd_set_error (bfd_error_bad_value);
2036
2037 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2038 }
2039 }
2040
2041 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2042
2043 static bfd_reloc_status_type
ppc_elf_addr16_ha_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry,asymbol * symbol,void * data ATTRIBUTE_UNUSED,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)2044 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2045 arelent *reloc_entry,
2046 asymbol *symbol,
2047 void *data ATTRIBUTE_UNUSED,
2048 asection *input_section,
2049 bfd *output_bfd,
2050 char **error_message ATTRIBUTE_UNUSED)
2051 {
2052 bfd_vma relocation;
2053
2054 if (output_bfd != NULL)
2055 {
2056 reloc_entry->address += input_section->output_offset;
2057 return bfd_reloc_ok;
2058 }
2059
2060 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2061 return bfd_reloc_outofrange;
2062
2063 if (bfd_is_com_section (symbol->section))
2064 relocation = 0;
2065 else
2066 relocation = symbol->value;
2067
2068 relocation += symbol->section->output_section->vma;
2069 relocation += symbol->section->output_offset;
2070 relocation += reloc_entry->addend;
2071 if (reloc_entry->howto->pc_relative)
2072 relocation -= reloc_entry->address;
2073
2074 reloc_entry->addend += (relocation & 0x8000) << 1;
2075
2076 return bfd_reloc_continue;
2077 }
2078
2079 static bfd_reloc_status_type
ppc_elf_unhandled_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)2080 ppc_elf_unhandled_reloc (bfd *abfd,
2081 arelent *reloc_entry,
2082 asymbol *symbol,
2083 void *data,
2084 asection *input_section,
2085 bfd *output_bfd,
2086 char **error_message)
2087 {
2088 /* If this is a relocatable link (output_bfd test tells us), just
2089 call the generic function. Any adjustment will be done at final
2090 link time. */
2091 if (output_bfd != NULL)
2092 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2093 input_section, output_bfd, error_message);
2094
2095 if (error_message != NULL)
2096 {
2097 static char buf[60];
2098 sprintf (buf, _("generic linker can't handle %s"),
2099 reloc_entry->howto->name);
2100 *error_message = buf;
2101 }
2102 return bfd_reloc_dangerous;
2103 }
2104
2105 /* Sections created by the linker. */
2106
2107 typedef struct elf_linker_section
2108 {
2109 /* Pointer to the bfd section. */
2110 asection *section;
2111 /* Section name. */
2112 const char *name;
2113 /* Associated bss section name. */
2114 const char *bss_name;
2115 /* Associated symbol name. */
2116 const char *sym_name;
2117 /* Associated symbol. */
2118 struct elf_link_hash_entry *sym;
2119 } elf_linker_section_t;
2120
2121 /* Linked list of allocated pointer entries. This hangs off of the
2122 symbol lists, and provides allows us to return different pointers,
2123 based on different addend's. */
2124
2125 typedef struct elf_linker_section_pointers
2126 {
2127 /* next allocated pointer for this symbol */
2128 struct elf_linker_section_pointers *next;
2129 /* offset of pointer from beginning of section */
2130 bfd_vma offset;
2131 /* addend used */
2132 bfd_vma addend;
2133 /* which linker section this is */
2134 elf_linker_section_t *lsect;
2135 } elf_linker_section_pointers_t;
2136
2137 struct ppc_elf_obj_tdata
2138 {
2139 struct elf_obj_tdata elf;
2140
2141 /* A mapping from local symbols to offsets into the various linker
2142 sections added. This is index by the symbol index. */
2143 elf_linker_section_pointers_t **linker_section_pointers;
2144
2145 /* Flags used to auto-detect plt type. */
2146 unsigned int makes_plt_call : 1;
2147 unsigned int has_rel16 : 1;
2148 };
2149
2150 #define ppc_elf_tdata(bfd) \
2151 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2152
2153 #define elf_local_ptr_offsets(bfd) \
2154 (ppc_elf_tdata (bfd)->linker_section_pointers)
2155
2156 #define is_ppc_elf(bfd) \
2157 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2158 && elf_object_id (bfd) == PPC32_ELF_DATA)
2159
2160 /* Override the generic function because we store some extras. */
2161
2162 static bfd_boolean
ppc_elf_mkobject(bfd * abfd)2163 ppc_elf_mkobject (bfd *abfd)
2164 {
2165 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2166 PPC32_ELF_DATA);
2167 }
2168
2169 /* Fix bad default arch selected for a 32 bit input bfd when the
2170 default is 64 bit. */
2171
2172 static bfd_boolean
ppc_elf_object_p(bfd * abfd)2173 ppc_elf_object_p (bfd *abfd)
2174 {
2175 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2176 {
2177 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2178
2179 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2180 {
2181 /* Relies on arch after 64 bit default being 32 bit default. */
2182 abfd->arch_info = abfd->arch_info->next;
2183 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2184 }
2185 }
2186 return TRUE;
2187 }
2188
2189 /* Function to set whether a module needs the -mrelocatable bit set. */
2190
2191 static bfd_boolean
ppc_elf_set_private_flags(bfd * abfd,flagword flags)2192 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2193 {
2194 BFD_ASSERT (!elf_flags_init (abfd)
2195 || elf_elfheader (abfd)->e_flags == flags);
2196
2197 elf_elfheader (abfd)->e_flags = flags;
2198 elf_flags_init (abfd) = TRUE;
2199 return TRUE;
2200 }
2201
2202 /* Support for core dump NOTE sections. */
2203
2204 static bfd_boolean
ppc_elf_grok_prstatus(bfd * abfd,Elf_Internal_Note * note)2205 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2206 {
2207 int offset;
2208 unsigned int size;
2209
2210 switch (note->descsz)
2211 {
2212 default:
2213 return FALSE;
2214
2215 case 268: /* Linux/PPC. */
2216 /* pr_cursig */
2217 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2218
2219 /* pr_pid */
2220 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2221
2222 /* pr_reg */
2223 offset = 72;
2224 size = 192;
2225
2226 break;
2227 }
2228
2229 /* Make a ".reg/999" section. */
2230 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2231 size, note->descpos + offset);
2232 }
2233
2234 static bfd_boolean
ppc_elf_grok_psinfo(bfd * abfd,Elf_Internal_Note * note)2235 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2236 {
2237 switch (note->descsz)
2238 {
2239 default:
2240 return FALSE;
2241
2242 case 128: /* Linux/PPC elf_prpsinfo. */
2243 elf_tdata (abfd)->core->pid
2244 = bfd_get_32 (abfd, note->descdata + 16);
2245 elf_tdata (abfd)->core->program
2246 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2247 elf_tdata (abfd)->core->command
2248 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2249 }
2250
2251 /* Note that for some reason, a spurious space is tacked
2252 onto the end of the args in some (at least one anyway)
2253 implementations, so strip it off if it exists. */
2254
2255 {
2256 char *command = elf_tdata (abfd)->core->command;
2257 int n = strlen (command);
2258
2259 if (0 < n && command[n - 1] == ' ')
2260 command[n - 1] = '\0';
2261 }
2262
2263 return TRUE;
2264 }
2265
2266 char *
elfcore_write_ppc_linux_prpsinfo32(bfd * abfd,char * buf,int * bufsiz,const struct elf_internal_linux_prpsinfo * prpsinfo)2267 elfcore_write_ppc_linux_prpsinfo32 (bfd *abfd, char *buf, int *bufsiz,
2268 const struct elf_internal_linux_prpsinfo *prpsinfo)
2269 {
2270 struct elf_external_ppc_linux_prpsinfo32 data;
2271
2272 memset (&data, 0, sizeof (data));
2273 PPC_LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data);
2274
2275 return elfcore_write_note (abfd, buf, bufsiz,
2276 "CORE", NT_PRPSINFO, &data, sizeof (data));
2277 }
2278
2279 static char *
ppc_elf_write_core_note(bfd * abfd,char * buf,int * bufsiz,int note_type,...)2280 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2281 {
2282 switch (note_type)
2283 {
2284 default:
2285 return NULL;
2286
2287 case NT_PRPSINFO:
2288 {
2289 char data[128];
2290 va_list ap;
2291
2292 va_start (ap, note_type);
2293 memset (data, 0, sizeof (data));
2294 strncpy (data + 32, va_arg (ap, const char *), 16);
2295 strncpy (data + 48, va_arg (ap, const char *), 80);
2296 va_end (ap);
2297 return elfcore_write_note (abfd, buf, bufsiz,
2298 "CORE", note_type, data, sizeof (data));
2299 }
2300
2301 case NT_PRSTATUS:
2302 {
2303 char data[268];
2304 va_list ap;
2305 long pid;
2306 int cursig;
2307 const void *greg;
2308
2309 va_start (ap, note_type);
2310 memset (data, 0, 72);
2311 pid = va_arg (ap, long);
2312 bfd_put_32 (abfd, pid, data + 24);
2313 cursig = va_arg (ap, int);
2314 bfd_put_16 (abfd, cursig, data + 12);
2315 greg = va_arg (ap, const void *);
2316 memcpy (data + 72, greg, 192);
2317 memset (data + 264, 0, 4);
2318 va_end (ap);
2319 return elfcore_write_note (abfd, buf, bufsiz,
2320 "CORE", note_type, data, sizeof (data));
2321 }
2322 }
2323 }
2324
2325 static flagword
ppc_elf_lookup_section_flags(char * flag_name)2326 ppc_elf_lookup_section_flags (char *flag_name)
2327 {
2328
2329 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2330 return SHF_PPC_VLE;
2331
2332 return 0;
2333 }
2334
2335 /* Add the VLE flag if required. */
2336
2337 bfd_boolean
ppc_elf_section_processing(bfd * abfd,Elf_Internal_Shdr * shdr)2338 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2339 {
2340 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2341 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2342 shdr->sh_flags |= SHF_PPC_VLE;
2343
2344 return TRUE;
2345 }
2346
2347 /* Return address for Ith PLT stub in section PLT, for relocation REL
2348 or (bfd_vma) -1 if it should not be included. */
2349
2350 static bfd_vma
ppc_elf_plt_sym_val(bfd_vma i ATTRIBUTE_UNUSED,const asection * plt ATTRIBUTE_UNUSED,const arelent * rel)2351 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2352 const asection *plt ATTRIBUTE_UNUSED,
2353 const arelent *rel)
2354 {
2355 return rel->address;
2356 }
2357
2358 /* Handle a PowerPC specific section when reading an object file. This
2359 is called when bfd_section_from_shdr finds a section with an unknown
2360 type. */
2361
2362 static bfd_boolean
ppc_elf_section_from_shdr(bfd * abfd,Elf_Internal_Shdr * hdr,const char * name,int shindex)2363 ppc_elf_section_from_shdr (bfd *abfd,
2364 Elf_Internal_Shdr *hdr,
2365 const char *name,
2366 int shindex)
2367 {
2368 asection *newsect;
2369 flagword flags;
2370
2371 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2372 return FALSE;
2373
2374 newsect = hdr->bfd_section;
2375 flags = bfd_get_section_flags (abfd, newsect);
2376 if (hdr->sh_flags & SHF_EXCLUDE)
2377 flags |= SEC_EXCLUDE;
2378
2379 if (hdr->sh_type == SHT_ORDERED)
2380 flags |= SEC_SORT_ENTRIES;
2381
2382 bfd_set_section_flags (abfd, newsect, flags);
2383 return TRUE;
2384 }
2385
2386 /* Set up any other section flags and such that may be necessary. */
2387
2388 static bfd_boolean
ppc_elf_fake_sections(bfd * abfd ATTRIBUTE_UNUSED,Elf_Internal_Shdr * shdr,asection * asect)2389 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2390 Elf_Internal_Shdr *shdr,
2391 asection *asect)
2392 {
2393 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2394 shdr->sh_type = SHT_ORDERED;
2395
2396 return TRUE;
2397 }
2398
2399 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2400 need to bump up the number of section headers. */
2401
2402 static int
ppc_elf_additional_program_headers(bfd * abfd,struct bfd_link_info * info ATTRIBUTE_UNUSED)2403 ppc_elf_additional_program_headers (bfd *abfd,
2404 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2405 {
2406 asection *s;
2407 int ret = 0;
2408
2409 s = bfd_get_section_by_name (abfd, ".sbss2");
2410 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2411 ++ret;
2412
2413 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2414 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2415 ++ret;
2416
2417 return ret;
2418 }
2419
2420 /* Modify the segment map for VLE executables. */
2421
2422 bfd_boolean
ppc_elf_modify_segment_map(bfd * abfd,struct bfd_link_info * info ATTRIBUTE_UNUSED)2423 ppc_elf_modify_segment_map (bfd *abfd,
2424 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2425 {
2426 struct elf_segment_map *m, *n;
2427 bfd_size_type amt;
2428 unsigned int j, k;
2429 bfd_boolean sect0_vle, sectj_vle;
2430
2431 /* At this point in the link, output sections have already been sorted by
2432 LMA and assigned to segments. All that is left to do is to ensure
2433 there is no mixing of VLE & non-VLE sections in a text segment.
2434 If we find that case, we split the segment.
2435 We maintain the original output section order. */
2436
2437 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2438 {
2439 if (m->count == 0)
2440 continue;
2441
2442 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2443 for (j = 1; j < m->count; ++j)
2444 {
2445 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2446
2447 if (sectj_vle != sect0_vle)
2448 break;
2449 }
2450 if (j >= m->count)
2451 continue;
2452
2453 /* sections 0..j-1 stay in this (current) segment,
2454 the remainder are put in a new segment.
2455 The scan resumes with the new segment. */
2456
2457 /* Fix the new segment. */
2458 amt = sizeof (struct elf_segment_map);
2459 amt += (m->count - j - 1) * sizeof (asection *);
2460 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2461 if (n == NULL)
2462 return FALSE;
2463
2464 n->p_type = PT_LOAD;
2465 n->p_flags = PF_X | PF_R;
2466 if (sectj_vle)
2467 n->p_flags |= PF_PPC_VLE;
2468 n->count = m->count - j;
2469 for (k = 0; k < n->count; ++k)
2470 {
2471 n->sections[k] = m->sections[j+k];
2472 m->sections[j+k] = NULL;
2473 }
2474 n->next = m->next;
2475 m->next = n;
2476
2477 /* Fix the current segment */
2478 m->count = j;
2479 }
2480
2481 return TRUE;
2482 }
2483
2484 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2485 .PPC.EMB.sbss0 a normal section, and not a bss section so
2486 that the linker doesn't crater when trying to make more than
2487 2 sections. */
2488
2489 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2490 {
2491 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2492 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2493 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2494 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2495 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2496 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2497 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2498 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2499 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2500 { NULL, 0, 0, 0, 0 }
2501 };
2502
2503 /* This is what we want for new plt/got. */
2504 static struct bfd_elf_special_section ppc_alt_plt =
2505 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2506
2507 static const struct bfd_elf_special_section *
ppc_elf_get_sec_type_attr(bfd * abfd ATTRIBUTE_UNUSED,asection * sec)2508 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2509 {
2510 const struct bfd_elf_special_section *ssect;
2511
2512 /* See if this is one of the special sections. */
2513 if (sec->name == NULL)
2514 return NULL;
2515
2516 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2517 sec->use_rela_p);
2518 if (ssect != NULL)
2519 {
2520 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2521 ssect = &ppc_alt_plt;
2522 return ssect;
2523 }
2524
2525 return _bfd_elf_get_sec_type_attr (abfd, sec);
2526 }
2527
2528 /* Very simple linked list structure for recording apuinfo values. */
2529 typedef struct apuinfo_list
2530 {
2531 struct apuinfo_list *next;
2532 unsigned long value;
2533 }
2534 apuinfo_list;
2535
2536 static apuinfo_list *head;
2537 static bfd_boolean apuinfo_set;
2538
2539 static void
apuinfo_list_init(void)2540 apuinfo_list_init (void)
2541 {
2542 head = NULL;
2543 apuinfo_set = FALSE;
2544 }
2545
2546 static void
apuinfo_list_add(unsigned long value)2547 apuinfo_list_add (unsigned long value)
2548 {
2549 apuinfo_list *entry = head;
2550
2551 while (entry != NULL)
2552 {
2553 if (entry->value == value)
2554 return;
2555 entry = entry->next;
2556 }
2557
2558 entry = bfd_malloc (sizeof (* entry));
2559 if (entry == NULL)
2560 return;
2561
2562 entry->value = value;
2563 entry->next = head;
2564 head = entry;
2565 }
2566
2567 static unsigned
apuinfo_list_length(void)2568 apuinfo_list_length (void)
2569 {
2570 apuinfo_list *entry;
2571 unsigned long count;
2572
2573 for (entry = head, count = 0;
2574 entry;
2575 entry = entry->next)
2576 ++ count;
2577
2578 return count;
2579 }
2580
2581 static inline unsigned long
apuinfo_list_element(unsigned long number)2582 apuinfo_list_element (unsigned long number)
2583 {
2584 apuinfo_list * entry;
2585
2586 for (entry = head;
2587 entry && number --;
2588 entry = entry->next)
2589 ;
2590
2591 return entry ? entry->value : 0;
2592 }
2593
2594 static void
apuinfo_list_finish(void)2595 apuinfo_list_finish (void)
2596 {
2597 apuinfo_list *entry;
2598
2599 for (entry = head; entry;)
2600 {
2601 apuinfo_list *next = entry->next;
2602 free (entry);
2603 entry = next;
2604 }
2605
2606 head = NULL;
2607 }
2608
2609 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2610 #define APUINFO_LABEL "APUinfo"
2611
2612 /* Scan the input BFDs and create a linked list of
2613 the APUinfo values that will need to be emitted. */
2614
2615 static void
ppc_elf_begin_write_processing(bfd * abfd,struct bfd_link_info * link_info)2616 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2617 {
2618 bfd *ibfd;
2619 asection *asec;
2620 char *buffer = NULL;
2621 bfd_size_type largest_input_size = 0;
2622 unsigned i;
2623 unsigned long length;
2624 const char *error_message = NULL;
2625
2626 if (link_info == NULL)
2627 return;
2628
2629 apuinfo_list_init ();
2630
2631 /* Read in the input sections contents. */
2632 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2633 {
2634 unsigned long datum;
2635
2636 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2637 if (asec == NULL)
2638 continue;
2639
2640 error_message = _("corrupt %s section in %B");
2641 length = asec->size;
2642 if (length < 20)
2643 goto fail;
2644
2645 apuinfo_set = TRUE;
2646 if (largest_input_size < asec->size)
2647 {
2648 if (buffer)
2649 free (buffer);
2650 largest_input_size = asec->size;
2651 buffer = bfd_malloc (largest_input_size);
2652 if (!buffer)
2653 return;
2654 }
2655
2656 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2657 || (bfd_bread (buffer, length, ibfd) != length))
2658 {
2659 error_message = _("unable to read in %s section from %B");
2660 goto fail;
2661 }
2662
2663 /* Verify the contents of the header. Note - we have to
2664 extract the values this way in order to allow for a
2665 host whose endian-ness is different from the target. */
2666 datum = bfd_get_32 (ibfd, buffer);
2667 if (datum != sizeof APUINFO_LABEL)
2668 goto fail;
2669
2670 datum = bfd_get_32 (ibfd, buffer + 8);
2671 if (datum != 0x2)
2672 goto fail;
2673
2674 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2675 goto fail;
2676
2677 /* Get the number of bytes used for apuinfo entries. */
2678 datum = bfd_get_32 (ibfd, buffer + 4);
2679 if (datum + 20 != length)
2680 goto fail;
2681
2682 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2683 for (i = 0; i < datum; i += 4)
2684 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2685 }
2686
2687 error_message = NULL;
2688
2689 if (apuinfo_set)
2690 {
2691 /* Compute the size of the output section. */
2692 unsigned num_entries = apuinfo_list_length ();
2693
2694 /* Set the output section size, if it exists. */
2695 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2696
2697 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2698 {
2699 ibfd = abfd;
2700 error_message = _("warning: unable to set size of %s section in %B");
2701 }
2702 }
2703
2704 fail:
2705 if (buffer)
2706 free (buffer);
2707
2708 if (error_message)
2709 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2710 }
2711
2712 /* Prevent the output section from accumulating the input sections'
2713 contents. We have already stored this in our linked list structure. */
2714
2715 static bfd_boolean
ppc_elf_write_section(bfd * abfd ATTRIBUTE_UNUSED,struct bfd_link_info * link_info ATTRIBUTE_UNUSED,asection * asec,bfd_byte * contents ATTRIBUTE_UNUSED)2716 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2717 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2718 asection *asec,
2719 bfd_byte *contents ATTRIBUTE_UNUSED)
2720 {
2721 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2722 }
2723
2724 /* Finally we can generate the output section. */
2725
2726 static void
ppc_elf_final_write_processing(bfd * abfd,bfd_boolean linker ATTRIBUTE_UNUSED)2727 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2728 {
2729 bfd_byte *buffer;
2730 asection *asec;
2731 unsigned i;
2732 unsigned num_entries;
2733 bfd_size_type length;
2734
2735 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2736 if (asec == NULL)
2737 return;
2738
2739 if (!apuinfo_set)
2740 return;
2741
2742 length = asec->size;
2743 if (length < 20)
2744 return;
2745
2746 buffer = bfd_malloc (length);
2747 if (buffer == NULL)
2748 {
2749 (*_bfd_error_handler)
2750 (_("failed to allocate space for new APUinfo section."));
2751 return;
2752 }
2753
2754 /* Create the apuinfo header. */
2755 num_entries = apuinfo_list_length ();
2756 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2757 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2758 bfd_put_32 (abfd, 0x2, buffer + 8);
2759 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2760
2761 length = 20;
2762 for (i = 0; i < num_entries; i++)
2763 {
2764 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2765 length += 4;
2766 }
2767
2768 if (length != asec->size)
2769 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2770
2771 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2772 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2773
2774 free (buffer);
2775
2776 apuinfo_list_finish ();
2777 }
2778
2779 static bfd_boolean
is_nonpic_glink_stub(bfd * abfd,asection * glink,bfd_vma off)2780 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2781 {
2782 bfd_byte buf[GLINK_ENTRY_SIZE];
2783
2784 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2785 return FALSE;
2786
2787 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2788 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2789 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2790 && bfd_get_32 (abfd, buf + 12) == BCTR);
2791 }
2792
2793 static bfd_boolean
section_covers_vma(bfd * abfd ATTRIBUTE_UNUSED,asection * section,void * ptr)2794 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2795 {
2796 bfd_vma vma = *(bfd_vma *) ptr;
2797 return ((section->flags & SEC_ALLOC) != 0
2798 && section->vma <= vma
2799 && vma < section->vma + section->size);
2800 }
2801
2802 static long
ppc_elf_get_synthetic_symtab(bfd * abfd,long symcount,asymbol ** syms,long dynsymcount,asymbol ** dynsyms,asymbol ** ret)2803 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2804 long dynsymcount, asymbol **dynsyms,
2805 asymbol **ret)
2806 {
2807 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2808 asection *plt, *relplt, *dynamic, *glink;
2809 bfd_vma glink_vma = 0;
2810 bfd_vma resolv_vma = 0;
2811 bfd_vma stub_vma;
2812 asymbol *s;
2813 arelent *p;
2814 long count, i;
2815 size_t size;
2816 char *names;
2817 bfd_byte buf[4];
2818
2819 *ret = NULL;
2820
2821 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2822 return 0;
2823
2824 if (dynsymcount <= 0)
2825 return 0;
2826
2827 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2828 if (relplt == NULL)
2829 return 0;
2830
2831 plt = bfd_get_section_by_name (abfd, ".plt");
2832 if (plt == NULL)
2833 return 0;
2834
2835 /* Call common code to handle old-style executable PLTs. */
2836 if (elf_section_flags (plt) & SHF_EXECINSTR)
2837 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2838 dynsymcount, dynsyms, ret);
2839
2840 /* If this object was prelinked, the prelinker stored the address
2841 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2842 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2843 if (dynamic != NULL)
2844 {
2845 bfd_byte *dynbuf, *extdyn, *extdynend;
2846 size_t extdynsize;
2847 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2848
2849 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2850 return -1;
2851
2852 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2853 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2854
2855 extdyn = dynbuf;
2856 extdynend = extdyn + dynamic->size;
2857 for (; extdyn < extdynend; extdyn += extdynsize)
2858 {
2859 Elf_Internal_Dyn dyn;
2860 (*swap_dyn_in) (abfd, extdyn, &dyn);
2861
2862 if (dyn.d_tag == DT_NULL)
2863 break;
2864
2865 if (dyn.d_tag == DT_PPC_GOT)
2866 {
2867 unsigned int g_o_t = dyn.d_un.d_val;
2868 asection *got = bfd_get_section_by_name (abfd, ".got");
2869 if (got != NULL
2870 && bfd_get_section_contents (abfd, got, buf,
2871 g_o_t - got->vma + 4, 4))
2872 glink_vma = bfd_get_32 (abfd, buf);
2873 break;
2874 }
2875 }
2876 free (dynbuf);
2877 }
2878
2879 /* Otherwise we read the first plt entry. */
2880 if (glink_vma == 0)
2881 {
2882 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2883 glink_vma = bfd_get_32 (abfd, buf);
2884 }
2885
2886 if (glink_vma == 0)
2887 return 0;
2888
2889 /* The .glink section usually does not survive the final
2890 link; search for the section (usually .text) where the
2891 glink stubs now reside. */
2892 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2893 if (glink == NULL)
2894 return 0;
2895
2896 /* Determine glink PLT resolver by reading the relative branch
2897 from the first glink stub. */
2898 if (bfd_get_section_contents (abfd, glink, buf,
2899 glink_vma - glink->vma, 4))
2900 {
2901 unsigned int insn = bfd_get_32 (abfd, buf);
2902
2903 /* The first glink stub may either branch to the resolver ... */
2904 insn ^= B;
2905 if ((insn & ~0x3fffffc) == 0)
2906 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2907
2908 /* ... or fall through a bunch of NOPs. */
2909 else if ((insn ^ B ^ NOP) == 0)
2910 for (i = 4;
2911 bfd_get_section_contents (abfd, glink, buf,
2912 glink_vma - glink->vma + i, 4);
2913 i += 4)
2914 if (bfd_get_32 (abfd, buf) != NOP)
2915 {
2916 resolv_vma = glink_vma + i;
2917 break;
2918 }
2919 }
2920
2921 count = relplt->size / sizeof (Elf32_External_Rela);
2922 stub_vma = glink_vma - (bfd_vma) count * 16;
2923 /* If the stubs are those for -shared/-pie then we might have
2924 multiple stubs for each plt entry. If that is the case then
2925 there is no way to associate stubs with their plt entries short
2926 of figuring out the GOT pointer value used in the stub. */
2927 if (!is_nonpic_glink_stub (abfd, glink,
2928 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2929 return 0;
2930
2931 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2932 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2933 return -1;
2934
2935 size = count * sizeof (asymbol);
2936 p = relplt->relocation;
2937 for (i = 0; i < count; i++, p++)
2938 {
2939 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2940 if (p->addend != 0)
2941 size += sizeof ("+0x") - 1 + 8;
2942 }
2943
2944 size += sizeof (asymbol) + sizeof ("__glink");
2945
2946 if (resolv_vma)
2947 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2948
2949 s = *ret = bfd_malloc (size);
2950 if (s == NULL)
2951 return -1;
2952
2953 names = (char *) (s + count + 1 + (resolv_vma != 0));
2954 p = relplt->relocation;
2955 for (i = 0; i < count; i++, p++)
2956 {
2957 size_t len;
2958
2959 *s = **p->sym_ptr_ptr;
2960 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2961 we are defining a symbol, ensure one of them is set. */
2962 if ((s->flags & BSF_LOCAL) == 0)
2963 s->flags |= BSF_GLOBAL;
2964 s->flags |= BSF_SYNTHETIC;
2965 s->section = glink;
2966 s->value = stub_vma - glink->vma;
2967 s->name = names;
2968 s->udata.p = NULL;
2969 len = strlen ((*p->sym_ptr_ptr)->name);
2970 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2971 names += len;
2972 if (p->addend != 0)
2973 {
2974 memcpy (names, "+0x", sizeof ("+0x") - 1);
2975 names += sizeof ("+0x") - 1;
2976 bfd_sprintf_vma (abfd, names, p->addend);
2977 names += strlen (names);
2978 }
2979 memcpy (names, "@plt", sizeof ("@plt"));
2980 names += sizeof ("@plt");
2981 ++s;
2982 stub_vma += 16;
2983 }
2984
2985 /* Add a symbol at the start of the glink branch table. */
2986 memset (s, 0, sizeof *s);
2987 s->the_bfd = abfd;
2988 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2989 s->section = glink;
2990 s->value = glink_vma - glink->vma;
2991 s->name = names;
2992 memcpy (names, "__glink", sizeof ("__glink"));
2993 names += sizeof ("__glink");
2994 s++;
2995 count++;
2996
2997 if (resolv_vma)
2998 {
2999 /* Add a symbol for the glink PLT resolver. */
3000 memset (s, 0, sizeof *s);
3001 s->the_bfd = abfd;
3002 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3003 s->section = glink;
3004 s->value = resolv_vma - glink->vma;
3005 s->name = names;
3006 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3007 names += sizeof ("__glink_PLTresolve");
3008 s++;
3009 count++;
3010 }
3011
3012 return count;
3013 }
3014
3015 /* The following functions are specific to the ELF linker, while
3016 functions above are used generally. They appear in this file more
3017 or less in the order in which they are called. eg.
3018 ppc_elf_check_relocs is called early in the link process,
3019 ppc_elf_finish_dynamic_sections is one of the last functions
3020 called. */
3021
3022 /* Track PLT entries needed for a given symbol. We might need more
3023 than one glink entry per symbol when generating a pic binary. */
3024 struct plt_entry
3025 {
3026 struct plt_entry *next;
3027
3028 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3029 This field stores the offset into .got2 used to initialise the
3030 GOT pointer reg. It will always be at least 32768. (Current
3031 gcc always uses an offset of 32768, but ld -r will pack .got2
3032 sections together resulting in larger offsets). */
3033 bfd_vma addend;
3034
3035 /* The .got2 section. */
3036 asection *sec;
3037
3038 /* PLT refcount or offset. */
3039 union
3040 {
3041 bfd_signed_vma refcount;
3042 bfd_vma offset;
3043 } plt;
3044
3045 /* .glink stub offset. */
3046 bfd_vma glink_offset;
3047 };
3048
3049 /* Of those relocs that might be copied as dynamic relocs, this function
3050 selects those that must be copied when linking a shared library,
3051 even when the symbol is local. */
3052
3053 static int
must_be_dyn_reloc(struct bfd_link_info * info,enum elf_ppc_reloc_type r_type)3054 must_be_dyn_reloc (struct bfd_link_info *info,
3055 enum elf_ppc_reloc_type r_type)
3056 {
3057 switch (r_type)
3058 {
3059 default:
3060 return 1;
3061
3062 case R_PPC_REL24:
3063 case R_PPC_REL14:
3064 case R_PPC_REL14_BRTAKEN:
3065 case R_PPC_REL14_BRNTAKEN:
3066 case R_PPC_REL32:
3067 return 0;
3068
3069 case R_PPC_TPREL32:
3070 case R_PPC_TPREL16:
3071 case R_PPC_TPREL16_LO:
3072 case R_PPC_TPREL16_HI:
3073 case R_PPC_TPREL16_HA:
3074 return !info->executable;
3075 }
3076 }
3077
3078 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3079 copying dynamic variables from a shared lib into an app's dynbss
3080 section, and instead use a dynamic relocation to point into the
3081 shared lib. */
3082 #define ELIMINATE_COPY_RELOCS 1
3083
3084 /* Used to track dynamic relocations for local symbols. */
3085 struct ppc_dyn_relocs
3086 {
3087 struct ppc_dyn_relocs *next;
3088
3089 /* The input section of the reloc. */
3090 asection *sec;
3091
3092 /* Total number of relocs copied for the input section. */
3093 unsigned int count : 31;
3094
3095 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3096 unsigned int ifunc : 1;
3097 };
3098
3099 /* PPC ELF linker hash entry. */
3100
3101 struct ppc_elf_link_hash_entry
3102 {
3103 struct elf_link_hash_entry elf;
3104
3105 /* If this symbol is used in the linker created sections, the processor
3106 specific backend uses this field to map the field into the offset
3107 from the beginning of the section. */
3108 elf_linker_section_pointers_t *linker_section_pointer;
3109
3110 /* Track dynamic relocs copied for this symbol. */
3111 struct elf_dyn_relocs *dyn_relocs;
3112
3113 /* Contexts in which symbol is used in the GOT (or TOC).
3114 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3115 corresponding relocs are encountered during check_relocs.
3116 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3117 indicate the corresponding GOT entry type is not needed. */
3118 #define TLS_GD 1 /* GD reloc. */
3119 #define TLS_LD 2 /* LD reloc. */
3120 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3121 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3122 #define TLS_TLS 16 /* Any TLS reloc. */
3123 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3124 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3125 char tls_mask;
3126
3127 /* Nonzero if we have seen a small data relocation referring to this
3128 symbol. */
3129 unsigned char has_sda_refs;
3130 };
3131
3132 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3133
3134 /* PPC ELF linker hash table. */
3135
3136 struct ppc_elf_link_hash_table
3137 {
3138 struct elf_link_hash_table elf;
3139
3140 /* Various options passed from the linker. */
3141 struct ppc_elf_params *params;
3142
3143 /* Short-cuts to get to dynamic linker sections. */
3144 asection *got;
3145 asection *relgot;
3146 asection *glink;
3147 asection *plt;
3148 asection *relplt;
3149 asection *iplt;
3150 asection *reliplt;
3151 asection *dynbss;
3152 asection *relbss;
3153 asection *dynsbss;
3154 asection *relsbss;
3155 elf_linker_section_t sdata[2];
3156 asection *sbss;
3157 asection *glink_eh_frame;
3158
3159 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3160 asection *srelplt2;
3161
3162 /* The .got.plt section (VxWorks only)*/
3163 asection *sgotplt;
3164
3165 /* Shortcut to __tls_get_addr. */
3166 struct elf_link_hash_entry *tls_get_addr;
3167
3168 /* The bfd that forced an old-style PLT. */
3169 bfd *old_bfd;
3170
3171 /* TLS local dynamic got entry handling. */
3172 union {
3173 bfd_signed_vma refcount;
3174 bfd_vma offset;
3175 } tlsld_got;
3176
3177 /* Offset of branch table to PltResolve function in glink. */
3178 bfd_vma glink_pltresolve;
3179
3180 /* Size of reserved GOT entries. */
3181 unsigned int got_header_size;
3182 /* Non-zero if allocating the header left a gap. */
3183 unsigned int got_gap;
3184
3185 /* The type of PLT we have chosen to use. */
3186 enum ppc_elf_plt_type plt_type;
3187
3188 /* True if the target system is VxWorks. */
3189 unsigned int is_vxworks:1;
3190
3191 /* The size of PLT entries. */
3192 int plt_entry_size;
3193 /* The distance between adjacent PLT slots. */
3194 int plt_slot_size;
3195 /* The size of the first PLT entry. */
3196 int plt_initial_entry_size;
3197
3198 /* Small local sym cache. */
3199 struct sym_cache sym_cache;
3200 };
3201
3202 /* Rename some of the generic section flags to better document how they
3203 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3204
3205 /* Nonzero if this section has TLS related relocations. */
3206 #define has_tls_reloc sec_flg0
3207
3208 /* Nonzero if this section has a call to __tls_get_addr. */
3209 #define has_tls_get_addr_call sec_flg1
3210
3211 /* Get the PPC ELF linker hash table from a link_info structure. */
3212
3213 #define ppc_elf_hash_table(p) \
3214 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3215 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3216
3217 /* Create an entry in a PPC ELF linker hash table. */
3218
3219 static struct bfd_hash_entry *
ppc_elf_link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)3220 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3221 struct bfd_hash_table *table,
3222 const char *string)
3223 {
3224 /* Allocate the structure if it has not already been allocated by a
3225 subclass. */
3226 if (entry == NULL)
3227 {
3228 entry = bfd_hash_allocate (table,
3229 sizeof (struct ppc_elf_link_hash_entry));
3230 if (entry == NULL)
3231 return entry;
3232 }
3233
3234 /* Call the allocation method of the superclass. */
3235 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3236 if (entry != NULL)
3237 {
3238 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3239 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3240 ppc_elf_hash_entry (entry)->tls_mask = 0;
3241 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3242 }
3243
3244 return entry;
3245 }
3246
3247 /* Create a PPC ELF linker hash table. */
3248
3249 static struct bfd_link_hash_table *
ppc_elf_link_hash_table_create(bfd * abfd)3250 ppc_elf_link_hash_table_create (bfd *abfd)
3251 {
3252 struct ppc_elf_link_hash_table *ret;
3253 static struct ppc_elf_params default_params = { PLT_OLD, 0, 1, 0, 0, 12 };
3254
3255 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3256 if (ret == NULL)
3257 return NULL;
3258
3259 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3260 ppc_elf_link_hash_newfunc,
3261 sizeof (struct ppc_elf_link_hash_entry),
3262 PPC32_ELF_DATA))
3263 {
3264 free (ret);
3265 return NULL;
3266 }
3267
3268 ret->elf.init_plt_refcount.refcount = 0;
3269 ret->elf.init_plt_refcount.glist = NULL;
3270 ret->elf.init_plt_offset.offset = 0;
3271 ret->elf.init_plt_offset.glist = NULL;
3272
3273 ret->params = &default_params;
3274
3275 ret->sdata[0].name = ".sdata";
3276 ret->sdata[0].sym_name = "_SDA_BASE_";
3277 ret->sdata[0].bss_name = ".sbss";
3278
3279 ret->sdata[1].name = ".sdata2";
3280 ret->sdata[1].sym_name = "_SDA2_BASE_";
3281 ret->sdata[1].bss_name = ".sbss2";
3282
3283 ret->plt_entry_size = 12;
3284 ret->plt_slot_size = 8;
3285 ret->plt_initial_entry_size = 72;
3286
3287 return &ret->elf.root;
3288 }
3289
3290 /* Hook linker params into hash table. */
3291
3292 void
ppc_elf_link_params(struct bfd_link_info * info,struct ppc_elf_params * params)3293 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3294 {
3295 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3296
3297 if (htab)
3298 htab->params = params;
3299 }
3300
3301 /* Create .got and the related sections. */
3302
3303 static bfd_boolean
ppc_elf_create_got(bfd * abfd,struct bfd_link_info * info)3304 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3305 {
3306 struct ppc_elf_link_hash_table *htab;
3307 asection *s;
3308 flagword flags;
3309
3310 if (!_bfd_elf_create_got_section (abfd, info))
3311 return FALSE;
3312
3313 htab = ppc_elf_hash_table (info);
3314 htab->got = s = bfd_get_linker_section (abfd, ".got");
3315 if (s == NULL)
3316 abort ();
3317
3318 if (htab->is_vxworks)
3319 {
3320 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3321 if (!htab->sgotplt)
3322 abort ();
3323 }
3324 else
3325 {
3326 /* The powerpc .got has a blrl instruction in it. Mark it
3327 executable. */
3328 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3329 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3330 if (!bfd_set_section_flags (abfd, s, flags))
3331 return FALSE;
3332 }
3333
3334 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3335 if (!htab->relgot)
3336 abort ();
3337
3338 return TRUE;
3339 }
3340
3341 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3342 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3343 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3344
3345 static bfd_boolean
ppc_elf_create_linker_section(bfd * abfd,struct bfd_link_info * info,flagword flags,elf_linker_section_t * lsect)3346 ppc_elf_create_linker_section (bfd *abfd,
3347 struct bfd_link_info *info,
3348 flagword flags,
3349 elf_linker_section_t *lsect)
3350 {
3351 asection *s;
3352
3353 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3354 | SEC_LINKER_CREATED);
3355
3356 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3357 if (s == NULL)
3358 return FALSE;
3359 lsect->section = s;
3360
3361 /* Define the sym on the first section of this name. */
3362 s = bfd_get_section_by_name (abfd, lsect->name);
3363
3364 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3365 if (lsect->sym == NULL)
3366 return FALSE;
3367 lsect->sym->root.u.def.value = 0x8000;
3368 return TRUE;
3369 }
3370
3371 static bfd_boolean
ppc_elf_create_glink(bfd * abfd,struct bfd_link_info * info)3372 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3373 {
3374 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3375 asection *s;
3376 flagword flags;
3377
3378 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3379 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3380 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3381 htab->glink = s;
3382 if (s == NULL
3383 || !bfd_set_section_alignment (abfd, s,
3384 htab->params->ppc476_workaround ? 6 : 4))
3385 return FALSE;
3386
3387 if (!info->no_ld_generated_unwind_info)
3388 {
3389 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3390 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3391 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3392 htab->glink_eh_frame = s;
3393 if (s == NULL
3394 || !bfd_set_section_alignment (abfd, s, 2))
3395 return FALSE;
3396 }
3397
3398 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3399 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3400 htab->iplt = s;
3401 if (s == NULL
3402 || !bfd_set_section_alignment (abfd, s, 4))
3403 return FALSE;
3404
3405 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3406 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3407 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3408 htab->reliplt = s;
3409 if (s == NULL
3410 || ! bfd_set_section_alignment (abfd, s, 2))
3411 return FALSE;
3412
3413 if (!ppc_elf_create_linker_section (abfd, info, 0,
3414 &htab->sdata[0]))
3415 return FALSE;
3416
3417 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3418 &htab->sdata[1]))
3419 return FALSE;
3420
3421 return TRUE;
3422 }
3423
3424 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3425 to output sections (just like _bfd_elf_create_dynamic_sections has
3426 to create .dynbss and .rela.bss). */
3427
3428 static bfd_boolean
ppc_elf_create_dynamic_sections(bfd * abfd,struct bfd_link_info * info)3429 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3430 {
3431 struct ppc_elf_link_hash_table *htab;
3432 asection *s;
3433 flagword flags;
3434
3435 htab = ppc_elf_hash_table (info);
3436
3437 if (htab->got == NULL
3438 && !ppc_elf_create_got (abfd, info))
3439 return FALSE;
3440
3441 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3442 return FALSE;
3443
3444 if (htab->glink == NULL
3445 && !ppc_elf_create_glink (abfd, info))
3446 return FALSE;
3447
3448 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3449 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3450 SEC_ALLOC | SEC_LINKER_CREATED);
3451 htab->dynsbss = s;
3452 if (s == NULL)
3453 return FALSE;
3454
3455 if (! info->shared)
3456 {
3457 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3458 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3459 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3460 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3461 htab->relsbss = s;
3462 if (s == NULL
3463 || ! bfd_set_section_alignment (abfd, s, 2))
3464 return FALSE;
3465 }
3466
3467 if (htab->is_vxworks
3468 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3469 return FALSE;
3470
3471 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3472 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3473 if (s == NULL)
3474 abort ();
3475
3476 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3477 if (htab->plt_type == PLT_VXWORKS)
3478 /* The VxWorks PLT is a loaded section with contents. */
3479 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3480 return bfd_set_section_flags (abfd, s, flags);
3481 }
3482
3483 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3484
3485 static void
ppc_elf_copy_indirect_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)3486 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3487 struct elf_link_hash_entry *dir,
3488 struct elf_link_hash_entry *ind)
3489 {
3490 struct ppc_elf_link_hash_entry *edir, *eind;
3491
3492 edir = (struct ppc_elf_link_hash_entry *) dir;
3493 eind = (struct ppc_elf_link_hash_entry *) ind;
3494
3495 edir->tls_mask |= eind->tls_mask;
3496 edir->has_sda_refs |= eind->has_sda_refs;
3497
3498 /* If called to transfer flags for a weakdef during processing
3499 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3500 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3501 if (!(ELIMINATE_COPY_RELOCS
3502 && eind->elf.root.type != bfd_link_hash_indirect
3503 && edir->elf.dynamic_adjusted))
3504 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3505
3506 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3507 edir->elf.ref_regular |= eind->elf.ref_regular;
3508 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3509 edir->elf.needs_plt |= eind->elf.needs_plt;
3510 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3511
3512 if (eind->dyn_relocs != NULL)
3513 {
3514 if (edir->dyn_relocs != NULL)
3515 {
3516 struct elf_dyn_relocs **pp;
3517 struct elf_dyn_relocs *p;
3518
3519 /* Add reloc counts against the indirect sym to the direct sym
3520 list. Merge any entries against the same section. */
3521 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3522 {
3523 struct elf_dyn_relocs *q;
3524
3525 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3526 if (q->sec == p->sec)
3527 {
3528 q->pc_count += p->pc_count;
3529 q->count += p->count;
3530 *pp = p->next;
3531 break;
3532 }
3533 if (q == NULL)
3534 pp = &p->next;
3535 }
3536 *pp = edir->dyn_relocs;
3537 }
3538
3539 edir->dyn_relocs = eind->dyn_relocs;
3540 eind->dyn_relocs = NULL;
3541 }
3542
3543 /* If we were called to copy over info for a weak sym, that's all.
3544 You might think dyn_relocs need not be copied over; After all,
3545 both syms will be dynamic or both non-dynamic so we're just
3546 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3547 code in ppc_elf_adjust_dynamic_symbol needs to check for
3548 dyn_relocs in read-only sections, and it does so on what is the
3549 DIR sym here. */
3550 if (eind->elf.root.type != bfd_link_hash_indirect)
3551 return;
3552
3553 /* Copy over the GOT refcount entries that we may have already seen to
3554 the symbol which just became indirect. */
3555 edir->elf.got.refcount += eind->elf.got.refcount;
3556 eind->elf.got.refcount = 0;
3557
3558 /* And plt entries. */
3559 if (eind->elf.plt.plist != NULL)
3560 {
3561 if (edir->elf.plt.plist != NULL)
3562 {
3563 struct plt_entry **entp;
3564 struct plt_entry *ent;
3565
3566 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3567 {
3568 struct plt_entry *dent;
3569
3570 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3571 if (dent->sec == ent->sec && dent->addend == ent->addend)
3572 {
3573 dent->plt.refcount += ent->plt.refcount;
3574 *entp = ent->next;
3575 break;
3576 }
3577 if (dent == NULL)
3578 entp = &ent->next;
3579 }
3580 *entp = edir->elf.plt.plist;
3581 }
3582
3583 edir->elf.plt.plist = eind->elf.plt.plist;
3584 eind->elf.plt.plist = NULL;
3585 }
3586
3587 if (eind->elf.dynindx != -1)
3588 {
3589 if (edir->elf.dynindx != -1)
3590 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3591 edir->elf.dynstr_index);
3592 edir->elf.dynindx = eind->elf.dynindx;
3593 edir->elf.dynstr_index = eind->elf.dynstr_index;
3594 eind->elf.dynindx = -1;
3595 eind->elf.dynstr_index = 0;
3596 }
3597 }
3598
3599 /* Hook called by the linker routine which adds symbols from an object
3600 file. We use it to put .comm items in .sbss, and not .bss. */
3601
3602 static bfd_boolean
ppc_elf_add_symbol_hook(bfd * abfd,struct bfd_link_info * info,Elf_Internal_Sym * sym,const char ** namep ATTRIBUTE_UNUSED,flagword * flagsp ATTRIBUTE_UNUSED,asection ** secp,bfd_vma * valp)3603 ppc_elf_add_symbol_hook (bfd *abfd,
3604 struct bfd_link_info *info,
3605 Elf_Internal_Sym *sym,
3606 const char **namep ATTRIBUTE_UNUSED,
3607 flagword *flagsp ATTRIBUTE_UNUSED,
3608 asection **secp,
3609 bfd_vma *valp)
3610 {
3611 if (sym->st_shndx == SHN_COMMON
3612 && !info->relocatable
3613 && is_ppc_elf (info->output_bfd)
3614 && sym->st_size <= elf_gp_size (abfd))
3615 {
3616 /* Common symbols less than or equal to -G nn bytes are automatically
3617 put into .sbss. */
3618 struct ppc_elf_link_hash_table *htab;
3619
3620 htab = ppc_elf_hash_table (info);
3621 if (htab->sbss == NULL)
3622 {
3623 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3624
3625 if (!htab->elf.dynobj)
3626 htab->elf.dynobj = abfd;
3627
3628 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3629 ".sbss",
3630 flags);
3631 if (htab->sbss == NULL)
3632 return FALSE;
3633 }
3634
3635 *secp = htab->sbss;
3636 *valp = sym->st_size;
3637 }
3638
3639 if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3640 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
3641 && (abfd->flags & DYNAMIC) == 0
3642 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3643 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3644
3645 return TRUE;
3646 }
3647
3648 /* Find a linker generated pointer with a given addend and type. */
3649
3650 static elf_linker_section_pointers_t *
elf_find_pointer_linker_section(elf_linker_section_pointers_t * linker_pointers,bfd_vma addend,elf_linker_section_t * lsect)3651 elf_find_pointer_linker_section
3652 (elf_linker_section_pointers_t *linker_pointers,
3653 bfd_vma addend,
3654 elf_linker_section_t *lsect)
3655 {
3656 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3657 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3658 return linker_pointers;
3659
3660 return NULL;
3661 }
3662
3663 /* Allocate a pointer to live in a linker created section. */
3664
3665 static bfd_boolean
elf_allocate_pointer_linker_section(bfd * abfd,elf_linker_section_t * lsect,struct elf_link_hash_entry * h,const Elf_Internal_Rela * rel)3666 elf_allocate_pointer_linker_section (bfd *abfd,
3667 elf_linker_section_t *lsect,
3668 struct elf_link_hash_entry *h,
3669 const Elf_Internal_Rela *rel)
3670 {
3671 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3672 elf_linker_section_pointers_t *linker_section_ptr;
3673 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3674 bfd_size_type amt;
3675
3676 BFD_ASSERT (lsect != NULL);
3677
3678 /* Is this a global symbol? */
3679 if (h != NULL)
3680 {
3681 struct ppc_elf_link_hash_entry *eh;
3682
3683 /* Has this symbol already been allocated? If so, our work is done. */
3684 eh = (struct ppc_elf_link_hash_entry *) h;
3685 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3686 rel->r_addend,
3687 lsect))
3688 return TRUE;
3689
3690 ptr_linker_section_ptr = &eh->linker_section_pointer;
3691 }
3692 else
3693 {
3694 BFD_ASSERT (is_ppc_elf (abfd));
3695
3696 /* Allocation of a pointer to a local symbol. */
3697 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3698
3699 /* Allocate a table to hold the local symbols if first time. */
3700 if (!ptr)
3701 {
3702 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3703
3704 amt = num_symbols;
3705 amt *= sizeof (elf_linker_section_pointers_t *);
3706 ptr = bfd_zalloc (abfd, amt);
3707
3708 if (!ptr)
3709 return FALSE;
3710
3711 elf_local_ptr_offsets (abfd) = ptr;
3712 }
3713
3714 /* Has this symbol already been allocated? If so, our work is done. */
3715 if (elf_find_pointer_linker_section (ptr[r_symndx],
3716 rel->r_addend,
3717 lsect))
3718 return TRUE;
3719
3720 ptr_linker_section_ptr = &ptr[r_symndx];
3721 }
3722
3723 /* Allocate space for a pointer in the linker section, and allocate
3724 a new pointer record from internal memory. */
3725 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3726 amt = sizeof (elf_linker_section_pointers_t);
3727 linker_section_ptr = bfd_alloc (abfd, amt);
3728
3729 if (!linker_section_ptr)
3730 return FALSE;
3731
3732 linker_section_ptr->next = *ptr_linker_section_ptr;
3733 linker_section_ptr->addend = rel->r_addend;
3734 linker_section_ptr->lsect = lsect;
3735 *ptr_linker_section_ptr = linker_section_ptr;
3736
3737 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3738 return FALSE;
3739 linker_section_ptr->offset = lsect->section->size;
3740 lsect->section->size += 4;
3741
3742 #ifdef DEBUG
3743 fprintf (stderr,
3744 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3745 lsect->name, (long) linker_section_ptr->offset,
3746 (long) lsect->section->size);
3747 #endif
3748
3749 return TRUE;
3750 }
3751
3752 static struct plt_entry **
update_local_sym_info(bfd * abfd,Elf_Internal_Shdr * symtab_hdr,unsigned long r_symndx,int tls_type)3753 update_local_sym_info (bfd *abfd,
3754 Elf_Internal_Shdr *symtab_hdr,
3755 unsigned long r_symndx,
3756 int tls_type)
3757 {
3758 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3759 struct plt_entry **local_plt;
3760 char *local_got_tls_masks;
3761
3762 if (local_got_refcounts == NULL)
3763 {
3764 bfd_size_type size = symtab_hdr->sh_info;
3765
3766 size *= (sizeof (*local_got_refcounts)
3767 + sizeof (*local_plt)
3768 + sizeof (*local_got_tls_masks));
3769 local_got_refcounts = bfd_zalloc (abfd, size);
3770 if (local_got_refcounts == NULL)
3771 return NULL;
3772 elf_local_got_refcounts (abfd) = local_got_refcounts;
3773 }
3774
3775 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3776 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3777 local_got_tls_masks[r_symndx] |= tls_type;
3778 if (tls_type != PLT_IFUNC)
3779 local_got_refcounts[r_symndx] += 1;
3780 return local_plt + r_symndx;
3781 }
3782
3783 static bfd_boolean
update_plt_info(bfd * abfd,struct plt_entry ** plist,asection * sec,bfd_vma addend)3784 update_plt_info (bfd *abfd, struct plt_entry **plist,
3785 asection *sec, bfd_vma addend)
3786 {
3787 struct plt_entry *ent;
3788
3789 if (addend < 32768)
3790 sec = NULL;
3791 for (ent = *plist; ent != NULL; ent = ent->next)
3792 if (ent->sec == sec && ent->addend == addend)
3793 break;
3794 if (ent == NULL)
3795 {
3796 bfd_size_type amt = sizeof (*ent);
3797 ent = bfd_alloc (abfd, amt);
3798 if (ent == NULL)
3799 return FALSE;
3800 ent->next = *plist;
3801 ent->sec = sec;
3802 ent->addend = addend;
3803 ent->plt.refcount = 0;
3804 *plist = ent;
3805 }
3806 ent->plt.refcount += 1;
3807 return TRUE;
3808 }
3809
3810 static struct plt_entry *
find_plt_ent(struct plt_entry ** plist,asection * sec,bfd_vma addend)3811 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3812 {
3813 struct plt_entry *ent;
3814
3815 if (addend < 32768)
3816 sec = NULL;
3817 for (ent = *plist; ent != NULL; ent = ent->next)
3818 if (ent->sec == sec && ent->addend == addend)
3819 break;
3820 return ent;
3821 }
3822
3823 static bfd_boolean
is_branch_reloc(enum elf_ppc_reloc_type r_type)3824 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3825 {
3826 return (r_type == R_PPC_PLTREL24
3827 || r_type == R_PPC_LOCAL24PC
3828 || r_type == R_PPC_REL24
3829 || r_type == R_PPC_REL14
3830 || r_type == R_PPC_REL14_BRTAKEN
3831 || r_type == R_PPC_REL14_BRNTAKEN
3832 || r_type == R_PPC_ADDR24
3833 || r_type == R_PPC_ADDR14
3834 || r_type == R_PPC_ADDR14_BRTAKEN
3835 || r_type == R_PPC_ADDR14_BRNTAKEN);
3836 }
3837
3838 static void
bad_shared_reloc(bfd * abfd,enum elf_ppc_reloc_type r_type)3839 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3840 {
3841 (*_bfd_error_handler)
3842 (_("%B: relocation %s cannot be used when making a shared object"),
3843 abfd,
3844 ppc_elf_howto_table[r_type]->name);
3845 bfd_set_error (bfd_error_bad_value);
3846 }
3847
3848 /* Look through the relocs for a section during the first phase, and
3849 allocate space in the global offset table or procedure linkage
3850 table. */
3851
3852 static bfd_boolean
ppc_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)3853 ppc_elf_check_relocs (bfd *abfd,
3854 struct bfd_link_info *info,
3855 asection *sec,
3856 const Elf_Internal_Rela *relocs)
3857 {
3858 struct ppc_elf_link_hash_table *htab;
3859 Elf_Internal_Shdr *symtab_hdr;
3860 struct elf_link_hash_entry **sym_hashes;
3861 const Elf_Internal_Rela *rel;
3862 const Elf_Internal_Rela *rel_end;
3863 asection *got2, *sreloc;
3864 struct elf_link_hash_entry *tga;
3865
3866 if (info->relocatable)
3867 return TRUE;
3868
3869 /* Don't do anything special with non-loaded, non-alloced sections.
3870 In particular, any relocs in such sections should not affect GOT
3871 and PLT reference counting (ie. we don't allow them to create GOT
3872 or PLT entries), there's no possibility or desire to optimize TLS
3873 relocs, and there's not much point in propagating relocs to shared
3874 libs that the dynamic linker won't relocate. */
3875 if ((sec->flags & SEC_ALLOC) == 0)
3876 return TRUE;
3877
3878 #ifdef DEBUG
3879 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3880 sec, abfd);
3881 #endif
3882
3883 BFD_ASSERT (is_ppc_elf (abfd));
3884
3885 /* Initialize howto table if not already done. */
3886 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3887 ppc_elf_howto_init ();
3888
3889 htab = ppc_elf_hash_table (info);
3890 if (htab->glink == NULL)
3891 {
3892 if (htab->elf.dynobj == NULL)
3893 htab->elf.dynobj = abfd;
3894 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3895 return FALSE;
3896 }
3897 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3898 FALSE, FALSE, TRUE);
3899 symtab_hdr = &elf_symtab_hdr (abfd);
3900 sym_hashes = elf_sym_hashes (abfd);
3901 got2 = bfd_get_section_by_name (abfd, ".got2");
3902 sreloc = NULL;
3903
3904 rel_end = relocs + sec->reloc_count;
3905 for (rel = relocs; rel < rel_end; rel++)
3906 {
3907 unsigned long r_symndx;
3908 enum elf_ppc_reloc_type r_type;
3909 struct elf_link_hash_entry *h;
3910 int tls_type;
3911
3912 r_symndx = ELF32_R_SYM (rel->r_info);
3913 if (r_symndx < symtab_hdr->sh_info)
3914 h = NULL;
3915 else
3916 {
3917 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3918 while (h->root.type == bfd_link_hash_indirect
3919 || h->root.type == bfd_link_hash_warning)
3920 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3921
3922 /* PR15323, ref flags aren't set for references in the same
3923 object. */
3924 h->root.non_ir_ref = 1;
3925 }
3926
3927 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3928 This shows up in particular in an R_PPC_ADDR32 in the eabi
3929 startup code. */
3930 if (h != NULL
3931 && htab->got == NULL
3932 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3933 {
3934 if (htab->elf.dynobj == NULL)
3935 htab->elf.dynobj = abfd;
3936 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3937 return FALSE;
3938 BFD_ASSERT (h == htab->elf.hgot);
3939 }
3940
3941 tls_type = 0;
3942 r_type = ELF32_R_TYPE (rel->r_info);
3943 if (h == NULL && !htab->is_vxworks)
3944 {
3945 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3946 abfd, r_symndx);
3947 if (isym == NULL)
3948 return FALSE;
3949
3950 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3951 {
3952 struct plt_entry **ifunc;
3953
3954 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
3955 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3956 PLT_IFUNC);
3957 if (ifunc == NULL)
3958 return FALSE;
3959
3960 /* STT_GNU_IFUNC symbols must have a PLT entry;
3961 In a non-pie executable even when there are
3962 no plt calls. */
3963 if (!info->shared
3964 || is_branch_reloc (r_type))
3965 {
3966 bfd_vma addend = 0;
3967 if (r_type == R_PPC_PLTREL24)
3968 {
3969 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3970 if (info->shared)
3971 addend = rel->r_addend;
3972 }
3973 if (!update_plt_info (abfd, ifunc, got2, addend))
3974 return FALSE;
3975 }
3976 }
3977 }
3978
3979 if (!htab->is_vxworks
3980 && is_branch_reloc (r_type)
3981 && h != NULL
3982 && h == tga)
3983 {
3984 if (rel != relocs
3985 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3986 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3987 /* We have a new-style __tls_get_addr call with a marker
3988 reloc. */
3989 ;
3990 else
3991 /* Mark this section as having an old-style call. */
3992 sec->has_tls_get_addr_call = 1;
3993 }
3994
3995 switch (r_type)
3996 {
3997 case R_PPC_TLSGD:
3998 case R_PPC_TLSLD:
3999 /* These special tls relocs tie a call to __tls_get_addr with
4000 its parameter symbol. */
4001 break;
4002
4003 case R_PPC_GOT_TLSLD16:
4004 case R_PPC_GOT_TLSLD16_LO:
4005 case R_PPC_GOT_TLSLD16_HI:
4006 case R_PPC_GOT_TLSLD16_HA:
4007 tls_type = TLS_TLS | TLS_LD;
4008 goto dogottls;
4009
4010 case R_PPC_GOT_TLSGD16:
4011 case R_PPC_GOT_TLSGD16_LO:
4012 case R_PPC_GOT_TLSGD16_HI:
4013 case R_PPC_GOT_TLSGD16_HA:
4014 tls_type = TLS_TLS | TLS_GD;
4015 goto dogottls;
4016
4017 case R_PPC_GOT_TPREL16:
4018 case R_PPC_GOT_TPREL16_LO:
4019 case R_PPC_GOT_TPREL16_HI:
4020 case R_PPC_GOT_TPREL16_HA:
4021 if (info->shared)
4022 info->flags |= DF_STATIC_TLS;
4023 tls_type = TLS_TLS | TLS_TPREL;
4024 goto dogottls;
4025
4026 case R_PPC_GOT_DTPREL16:
4027 case R_PPC_GOT_DTPREL16_LO:
4028 case R_PPC_GOT_DTPREL16_HI:
4029 case R_PPC_GOT_DTPREL16_HA:
4030 tls_type = TLS_TLS | TLS_DTPREL;
4031 dogottls:
4032 sec->has_tls_reloc = 1;
4033 /* Fall thru */
4034
4035 /* GOT16 relocations */
4036 case R_PPC_GOT16:
4037 case R_PPC_GOT16_LO:
4038 case R_PPC_GOT16_HI:
4039 case R_PPC_GOT16_HA:
4040 /* This symbol requires a global offset table entry. */
4041 if (htab->got == NULL)
4042 {
4043 if (htab->elf.dynobj == NULL)
4044 htab->elf.dynobj = abfd;
4045 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4046 return FALSE;
4047 }
4048 if (h != NULL)
4049 {
4050 h->got.refcount += 1;
4051 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4052 }
4053 else
4054 /* This is a global offset table entry for a local symbol. */
4055 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4056 return FALSE;
4057
4058 /* We may also need a plt entry if the symbol turns out to be
4059 an ifunc. */
4060 if (h != NULL && !info->shared)
4061 {
4062 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4063 return FALSE;
4064 }
4065 break;
4066
4067 /* Indirect .sdata relocation. */
4068 case R_PPC_EMB_SDAI16:
4069 if (info->shared)
4070 {
4071 bad_shared_reloc (abfd, r_type);
4072 return FALSE;
4073 }
4074 htab->sdata[0].sym->ref_regular = 1;
4075 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4076 h, rel))
4077 return FALSE;
4078 if (h != NULL)
4079 {
4080 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4081 h->non_got_ref = TRUE;
4082 }
4083 break;
4084
4085 /* Indirect .sdata2 relocation. */
4086 case R_PPC_EMB_SDA2I16:
4087 if (info->shared)
4088 {
4089 bad_shared_reloc (abfd, r_type);
4090 return FALSE;
4091 }
4092 htab->sdata[1].sym->ref_regular = 1;
4093 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4094 h, rel))
4095 return FALSE;
4096 if (h != NULL)
4097 {
4098 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4099 h->non_got_ref = TRUE;
4100 }
4101 break;
4102
4103 case R_PPC_SDAREL16:
4104 htab->sdata[0].sym->ref_regular = 1;
4105 /* Fall thru */
4106
4107 case R_PPC_VLE_SDAREL_LO16A:
4108 case R_PPC_VLE_SDAREL_LO16D:
4109 case R_PPC_VLE_SDAREL_HI16A:
4110 case R_PPC_VLE_SDAREL_HI16D:
4111 case R_PPC_VLE_SDAREL_HA16A:
4112 case R_PPC_VLE_SDAREL_HA16D:
4113 if (h != NULL)
4114 {
4115 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4116 h->non_got_ref = TRUE;
4117 }
4118 break;
4119
4120 case R_PPC_VLE_REL8:
4121 case R_PPC_VLE_REL15:
4122 case R_PPC_VLE_REL24:
4123 case R_PPC_VLE_LO16A:
4124 case R_PPC_VLE_LO16D:
4125 case R_PPC_VLE_HI16A:
4126 case R_PPC_VLE_HI16D:
4127 case R_PPC_VLE_HA16A:
4128 case R_PPC_VLE_HA16D:
4129 break;
4130
4131 case R_PPC_EMB_SDA2REL:
4132 if (info->shared)
4133 {
4134 bad_shared_reloc (abfd, r_type);
4135 return FALSE;
4136 }
4137 htab->sdata[1].sym->ref_regular = 1;
4138 if (h != NULL)
4139 {
4140 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4141 h->non_got_ref = TRUE;
4142 }
4143 break;
4144
4145 case R_PPC_VLE_SDA21_LO:
4146 case R_PPC_VLE_SDA21:
4147 case R_PPC_EMB_SDA21:
4148 case R_PPC_EMB_RELSDA:
4149 if (info->shared)
4150 {
4151 bad_shared_reloc (abfd, r_type);
4152 return FALSE;
4153 }
4154 if (h != NULL)
4155 {
4156 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4157 h->non_got_ref = TRUE;
4158 }
4159 break;
4160
4161 case R_PPC_EMB_NADDR32:
4162 case R_PPC_EMB_NADDR16:
4163 case R_PPC_EMB_NADDR16_LO:
4164 case R_PPC_EMB_NADDR16_HI:
4165 case R_PPC_EMB_NADDR16_HA:
4166 if (info->shared)
4167 {
4168 bad_shared_reloc (abfd, r_type);
4169 return FALSE;
4170 }
4171 if (h != NULL)
4172 h->non_got_ref = TRUE;
4173 break;
4174
4175 case R_PPC_PLTREL24:
4176 if (h == NULL)
4177 break;
4178 /* Fall through */
4179 case R_PPC_PLT32:
4180 case R_PPC_PLTREL32:
4181 case R_PPC_PLT16_LO:
4182 case R_PPC_PLT16_HI:
4183 case R_PPC_PLT16_HA:
4184 #ifdef DEBUG
4185 fprintf (stderr, "Reloc requires a PLT entry\n");
4186 #endif
4187 /* This symbol requires a procedure linkage table entry. We
4188 actually build the entry in finish_dynamic_symbol,
4189 because this might be a case of linking PIC code without
4190 linking in any dynamic objects, in which case we don't
4191 need to generate a procedure linkage table after all. */
4192
4193 if (h == NULL)
4194 {
4195 /* It does not make sense to have a procedure linkage
4196 table entry for a local symbol. */
4197 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"),
4198 abfd, sec, rel->r_offset,
4199 ppc_elf_howto_table[r_type]->name);
4200 bfd_set_error (bfd_error_bad_value);
4201 return FALSE;
4202 }
4203 else
4204 {
4205 bfd_vma addend = 0;
4206
4207 if (r_type == R_PPC_PLTREL24)
4208 {
4209 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4210 if (info->shared)
4211 addend = rel->r_addend;
4212 }
4213 h->needs_plt = 1;
4214 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4215 return FALSE;
4216 }
4217 break;
4218
4219 /* The following relocations don't need to propagate the
4220 relocation if linking a shared object since they are
4221 section relative. */
4222 case R_PPC_SECTOFF:
4223 case R_PPC_SECTOFF_LO:
4224 case R_PPC_SECTOFF_HI:
4225 case R_PPC_SECTOFF_HA:
4226 case R_PPC_DTPREL16:
4227 case R_PPC_DTPREL16_LO:
4228 case R_PPC_DTPREL16_HI:
4229 case R_PPC_DTPREL16_HA:
4230 case R_PPC_TOC16:
4231 break;
4232
4233 case R_PPC_REL16:
4234 case R_PPC_REL16_LO:
4235 case R_PPC_REL16_HI:
4236 case R_PPC_REL16_HA:
4237 ppc_elf_tdata (abfd)->has_rel16 = 1;
4238 break;
4239
4240 /* These are just markers. */
4241 case R_PPC_TLS:
4242 case R_PPC_EMB_MRKREF:
4243 case R_PPC_NONE:
4244 case R_PPC_max:
4245 case R_PPC_RELAX:
4246 case R_PPC_RELAX_PLT:
4247 case R_PPC_RELAX_PLTREL24:
4248 break;
4249
4250 /* These should only appear in dynamic objects. */
4251 case R_PPC_COPY:
4252 case R_PPC_GLOB_DAT:
4253 case R_PPC_JMP_SLOT:
4254 case R_PPC_RELATIVE:
4255 case R_PPC_IRELATIVE:
4256 break;
4257
4258 /* These aren't handled yet. We'll report an error later. */
4259 case R_PPC_ADDR30:
4260 case R_PPC_EMB_RELSEC16:
4261 case R_PPC_EMB_RELST_LO:
4262 case R_PPC_EMB_RELST_HI:
4263 case R_PPC_EMB_RELST_HA:
4264 case R_PPC_EMB_BIT_FLD:
4265 break;
4266
4267 /* This refers only to functions defined in the shared library. */
4268 case R_PPC_LOCAL24PC:
4269 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4270 {
4271 htab->plt_type = PLT_OLD;
4272 htab->old_bfd = abfd;
4273 }
4274 if (h != NULL && h->type == STT_GNU_IFUNC)
4275 {
4276 if (info->shared)
4277 {
4278 info->callbacks->einfo (_("%P: %H: @local call to ifunc %s\n"),
4279 abfd, sec, rel->r_offset,
4280 h->root.root.string);
4281 bfd_set_error (bfd_error_bad_value);
4282 return FALSE;
4283 }
4284 h->needs_plt = 1;
4285 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4286 return FALSE;
4287 }
4288 break;
4289
4290 /* This relocation describes the C++ object vtable hierarchy.
4291 Reconstruct it for later use during GC. */
4292 case R_PPC_GNU_VTINHERIT:
4293 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4294 return FALSE;
4295 break;
4296
4297 /* This relocation describes which C++ vtable entries are actually
4298 used. Record for later use during GC. */
4299 case R_PPC_GNU_VTENTRY:
4300 BFD_ASSERT (h != NULL);
4301 if (h != NULL
4302 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4303 return FALSE;
4304 break;
4305
4306 /* We shouldn't really be seeing these. */
4307 case R_PPC_TPREL32:
4308 case R_PPC_TPREL16:
4309 case R_PPC_TPREL16_LO:
4310 case R_PPC_TPREL16_HI:
4311 case R_PPC_TPREL16_HA:
4312 if (info->shared)
4313 info->flags |= DF_STATIC_TLS;
4314 goto dodyn;
4315
4316 /* Nor these. */
4317 case R_PPC_DTPMOD32:
4318 case R_PPC_DTPREL32:
4319 goto dodyn;
4320
4321 case R_PPC_REL32:
4322 if (h == NULL
4323 && got2 != NULL
4324 && (sec->flags & SEC_CODE) != 0
4325 && info->shared
4326 && htab->plt_type == PLT_UNSET)
4327 {
4328 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4329 the start of a function, which assembles to a REL32
4330 reference to .got2. If we detect one of these, then
4331 force the old PLT layout because the linker cannot
4332 reliably deduce the GOT pointer value needed for
4333 PLT call stubs. */
4334 asection *s;
4335 Elf_Internal_Sym *isym;
4336
4337 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4338 abfd, r_symndx);
4339 if (isym == NULL)
4340 return FALSE;
4341
4342 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4343 if (s == got2)
4344 {
4345 htab->plt_type = PLT_OLD;
4346 htab->old_bfd = abfd;
4347 }
4348 }
4349 if (h == NULL || h == htab->elf.hgot)
4350 break;
4351 /* fall through */
4352
4353 case R_PPC_ADDR32:
4354 case R_PPC_ADDR16:
4355 case R_PPC_ADDR16_LO:
4356 case R_PPC_ADDR16_HI:
4357 case R_PPC_ADDR16_HA:
4358 case R_PPC_UADDR32:
4359 case R_PPC_UADDR16:
4360 if (h != NULL && !info->shared)
4361 {
4362 /* We may need a plt entry if the symbol turns out to be
4363 a function defined in a dynamic object. */
4364 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4365 return FALSE;
4366
4367 /* We may need a copy reloc too. */
4368 h->non_got_ref = 1;
4369 h->pointer_equality_needed = 1;
4370 }
4371 goto dodyn;
4372
4373 case R_PPC_REL24:
4374 case R_PPC_REL14:
4375 case R_PPC_REL14_BRTAKEN:
4376 case R_PPC_REL14_BRNTAKEN:
4377 if (h == NULL)
4378 break;
4379 if (h == htab->elf.hgot)
4380 {
4381 if (htab->plt_type == PLT_UNSET)
4382 {
4383 htab->plt_type = PLT_OLD;
4384 htab->old_bfd = abfd;
4385 }
4386 break;
4387 }
4388 /* fall through */
4389
4390 case R_PPC_ADDR24:
4391 case R_PPC_ADDR14:
4392 case R_PPC_ADDR14_BRTAKEN:
4393 case R_PPC_ADDR14_BRNTAKEN:
4394 if (h != NULL && !info->shared)
4395 {
4396 /* We may need a plt entry if the symbol turns out to be
4397 a function defined in a dynamic object. */
4398 h->needs_plt = 1;
4399 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4400 return FALSE;
4401 break;
4402 }
4403
4404 dodyn:
4405 /* If we are creating a shared library, and this is a reloc
4406 against a global symbol, or a non PC relative reloc
4407 against a local symbol, then we need to copy the reloc
4408 into the shared library. However, if we are linking with
4409 -Bsymbolic, we do not need to copy a reloc against a
4410 global symbol which is defined in an object we are
4411 including in the link (i.e., DEF_REGULAR is set). At
4412 this point we have not seen all the input files, so it is
4413 possible that DEF_REGULAR is not set now but will be set
4414 later (it is never cleared). In case of a weak definition,
4415 DEF_REGULAR may be cleared later by a strong definition in
4416 a shared library. We account for that possibility below by
4417 storing information in the dyn_relocs field of the hash
4418 table entry. A similar situation occurs when creating
4419 shared libraries and symbol visibility changes render the
4420 symbol local.
4421
4422 If on the other hand, we are creating an executable, we
4423 may need to keep relocations for symbols satisfied by a
4424 dynamic library if we manage to avoid copy relocs for the
4425 symbol. */
4426 if ((info->shared
4427 && (must_be_dyn_reloc (info, r_type)
4428 || (h != NULL
4429 && (!SYMBOLIC_BIND (info, h)
4430 || h->root.type == bfd_link_hash_defweak
4431 || !h->def_regular))))
4432 || (ELIMINATE_COPY_RELOCS
4433 && !info->shared
4434 && h != NULL
4435 && (h->root.type == bfd_link_hash_defweak
4436 || !h->def_regular)))
4437 {
4438 #ifdef DEBUG
4439 fprintf (stderr,
4440 "ppc_elf_check_relocs needs to "
4441 "create relocation for %s\n",
4442 (h && h->root.root.string
4443 ? h->root.root.string : "<unknown>"));
4444 #endif
4445 if (sreloc == NULL)
4446 {
4447 if (htab->elf.dynobj == NULL)
4448 htab->elf.dynobj = abfd;
4449
4450 sreloc = _bfd_elf_make_dynamic_reloc_section
4451 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4452
4453 if (sreloc == NULL)
4454 return FALSE;
4455 }
4456
4457 /* If this is a global symbol, we count the number of
4458 relocations we need for this symbol. */
4459 if (h != NULL)
4460 {
4461 struct elf_dyn_relocs *p;
4462 struct elf_dyn_relocs **rel_head;
4463
4464 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4465 p = *rel_head;
4466 if (p == NULL || p->sec != sec)
4467 {
4468 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4469 if (p == NULL)
4470 return FALSE;
4471 p->next = *rel_head;
4472 *rel_head = p;
4473 p->sec = sec;
4474 p->count = 0;
4475 p->pc_count = 0;
4476 }
4477 p->count += 1;
4478 if (!must_be_dyn_reloc (info, r_type))
4479 p->pc_count += 1;
4480 }
4481 else
4482 {
4483 /* Track dynamic relocs needed for local syms too.
4484 We really need local syms available to do this
4485 easily. Oh well. */
4486 struct ppc_dyn_relocs *p;
4487 struct ppc_dyn_relocs **rel_head;
4488 bfd_boolean is_ifunc;
4489 asection *s;
4490 void *vpp;
4491 Elf_Internal_Sym *isym;
4492
4493 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4494 abfd, r_symndx);
4495 if (isym == NULL)
4496 return FALSE;
4497
4498 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4499 if (s == NULL)
4500 s = sec;
4501
4502 vpp = &elf_section_data (s)->local_dynrel;
4503 rel_head = (struct ppc_dyn_relocs **) vpp;
4504 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4505 p = *rel_head;
4506 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4507 p = p->next;
4508 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4509 {
4510 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4511 if (p == NULL)
4512 return FALSE;
4513 p->next = *rel_head;
4514 *rel_head = p;
4515 p->sec = sec;
4516 p->ifunc = is_ifunc;
4517 p->count = 0;
4518 }
4519 p->count += 1;
4520 }
4521 }
4522
4523 break;
4524 }
4525 }
4526
4527 return TRUE;
4528 }
4529
4530
4531 /* Merge object attributes from IBFD into OBFD. Raise an error if
4532 there are conflicting attributes. */
4533 static bfd_boolean
ppc_elf_merge_obj_attributes(bfd * ibfd,bfd * obfd)4534 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4535 {
4536 obj_attribute *in_attr, *in_attrs;
4537 obj_attribute *out_attr, *out_attrs;
4538
4539 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4540 {
4541 /* This is the first object. Copy the attributes. */
4542 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4543
4544 /* Use the Tag_null value to indicate the attributes have been
4545 initialized. */
4546 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4547
4548 return TRUE;
4549 }
4550
4551 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4552 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4553
4554 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4555 non-conflicting ones. */
4556 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4557 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4558 if (in_attr->i != out_attr->i)
4559 {
4560 out_attr->type = 1;
4561 if (out_attr->i == 0)
4562 out_attr->i = in_attr->i;
4563 else if (in_attr->i == 0)
4564 ;
4565 else if (out_attr->i == 1 && in_attr->i == 2)
4566 _bfd_error_handler
4567 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4568 else if (out_attr->i == 1 && in_attr->i == 3)
4569 _bfd_error_handler
4570 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4571 obfd, ibfd);
4572 else if (out_attr->i == 3 && in_attr->i == 1)
4573 _bfd_error_handler
4574 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4575 ibfd, obfd);
4576 else if (out_attr->i == 3 && in_attr->i == 2)
4577 _bfd_error_handler
4578 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4579 ibfd, obfd);
4580 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4581 _bfd_error_handler
4582 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4583 else if (in_attr->i > 3)
4584 _bfd_error_handler
4585 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4586 in_attr->i);
4587 else
4588 _bfd_error_handler
4589 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4590 out_attr->i);
4591 }
4592
4593 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4594 merge non-conflicting ones. */
4595 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4596 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4597 if (in_attr->i != out_attr->i)
4598 {
4599 const char *in_abi = NULL, *out_abi = NULL;
4600
4601 switch (in_attr->i)
4602 {
4603 case 1: in_abi = "generic"; break;
4604 case 2: in_abi = "AltiVec"; break;
4605 case 3: in_abi = "SPE"; break;
4606 }
4607
4608 switch (out_attr->i)
4609 {
4610 case 1: out_abi = "generic"; break;
4611 case 2: out_abi = "AltiVec"; break;
4612 case 3: out_abi = "SPE"; break;
4613 }
4614
4615 out_attr->type = 1;
4616 if (out_attr->i == 0)
4617 out_attr->i = in_attr->i;
4618 else if (in_attr->i == 0)
4619 ;
4620 /* For now, allow generic to transition to AltiVec or SPE
4621 without a warning. If GCC marked files with their stack
4622 alignment and used don't-care markings for files which are
4623 not affected by the vector ABI, we could warn about this
4624 case too. */
4625 else if (out_attr->i == 1)
4626 out_attr->i = in_attr->i;
4627 else if (in_attr->i == 1)
4628 ;
4629 else if (in_abi == NULL)
4630 _bfd_error_handler
4631 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4632 in_attr->i);
4633 else if (out_abi == NULL)
4634 _bfd_error_handler
4635 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4636 in_attr->i);
4637 else
4638 _bfd_error_handler
4639 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4640 ibfd, obfd, in_abi, out_abi);
4641 }
4642
4643 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4644 and merge non-conflicting ones. */
4645 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4646 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4647 if (in_attr->i != out_attr->i)
4648 {
4649 out_attr->type = 1;
4650 if (out_attr->i == 0)
4651 out_attr->i = in_attr->i;
4652 else if (in_attr->i == 0)
4653 ;
4654 else if (out_attr->i == 1 && in_attr->i == 2)
4655 _bfd_error_handler
4656 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4657 else if (out_attr->i == 2 && in_attr->i == 1)
4658 _bfd_error_handler
4659 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4660 else if (in_attr->i > 2)
4661 _bfd_error_handler
4662 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4663 in_attr->i);
4664 else
4665 _bfd_error_handler
4666 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4667 out_attr->i);
4668 }
4669
4670 /* Merge Tag_compatibility attributes and any common GNU ones. */
4671 _bfd_elf_merge_object_attributes (ibfd, obfd);
4672
4673 return TRUE;
4674 }
4675
4676 /* Merge backend specific data from an object file to the output
4677 object file when linking. */
4678
4679 static bfd_boolean
ppc_elf_merge_private_bfd_data(bfd * ibfd,bfd * obfd)4680 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4681 {
4682 flagword old_flags;
4683 flagword new_flags;
4684 bfd_boolean error;
4685
4686 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4687 return TRUE;
4688
4689 /* Check if we have the same endianness. */
4690 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4691 return FALSE;
4692
4693 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4694 return FALSE;
4695
4696 new_flags = elf_elfheader (ibfd)->e_flags;
4697 old_flags = elf_elfheader (obfd)->e_flags;
4698 if (!elf_flags_init (obfd))
4699 {
4700 /* First call, no flags set. */
4701 elf_flags_init (obfd) = TRUE;
4702 elf_elfheader (obfd)->e_flags = new_flags;
4703 }
4704
4705 /* Compatible flags are ok. */
4706 else if (new_flags == old_flags)
4707 ;
4708
4709 /* Incompatible flags. */
4710 else
4711 {
4712 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4713 to be linked with either. */
4714 error = FALSE;
4715 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4716 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4717 {
4718 error = TRUE;
4719 (*_bfd_error_handler)
4720 (_("%B: compiled with -mrelocatable and linked with "
4721 "modules compiled normally"), ibfd);
4722 }
4723 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4724 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4725 {
4726 error = TRUE;
4727 (*_bfd_error_handler)
4728 (_("%B: compiled normally and linked with "
4729 "modules compiled with -mrelocatable"), ibfd);
4730 }
4731
4732 /* The output is -mrelocatable-lib iff both the input files are. */
4733 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4734 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4735
4736 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4737 but each input file is either -mrelocatable or -mrelocatable-lib. */
4738 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4739 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4740 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4741 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4742
4743 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4744 any module uses it. */
4745 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4746
4747 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4748 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4749
4750 /* Warn about any other mismatches. */
4751 if (new_flags != old_flags)
4752 {
4753 error = TRUE;
4754 (*_bfd_error_handler)
4755 (_("%B: uses different e_flags (0x%lx) fields "
4756 "than previous modules (0x%lx)"),
4757 ibfd, (long) new_flags, (long) old_flags);
4758 }
4759
4760 if (error)
4761 {
4762 bfd_set_error (bfd_error_bad_value);
4763 return FALSE;
4764 }
4765 }
4766
4767 return TRUE;
4768 }
4769
4770 static void
ppc_elf_vle_split16(bfd * output_bfd,bfd_byte * loc,bfd_vma value,split16_format_type split16_format)4771 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc,
4772 bfd_vma value,
4773 split16_format_type split16_format)
4774
4775 {
4776 unsigned int insn, top5;
4777
4778 insn = bfd_get_32 (output_bfd, loc);
4779 top5 = value & 0xf800;
4780 top5 = top5 << (split16_format == split16a_type ? 9 : 5);
4781 insn |= top5;
4782 insn |= value & 0x7ff;
4783 bfd_put_32 (output_bfd, insn, loc);
4784 }
4785
4786
4787 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4788 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4789 int
ppc_elf_select_plt_layout(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)4790 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4791 struct bfd_link_info *info)
4792 {
4793 struct ppc_elf_link_hash_table *htab;
4794 flagword flags;
4795
4796 htab = ppc_elf_hash_table (info);
4797
4798 if (htab->plt_type == PLT_UNSET)
4799 {
4800 struct elf_link_hash_entry *h;
4801
4802 if (htab->params->plt_style == PLT_OLD)
4803 htab->plt_type = PLT_OLD;
4804 else if (info->shared
4805 && htab->elf.dynamic_sections_created
4806 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4807 FALSE, FALSE, TRUE)) != NULL
4808 && (h->type == STT_FUNC
4809 || h->needs_plt)
4810 && h->ref_regular
4811 && !(SYMBOL_CALLS_LOCAL (info, h)
4812 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4813 && h->root.type == bfd_link_hash_undefweak)))
4814 {
4815 /* Profiling of shared libs (and pies) is not supported with
4816 secure plt, because ppc32 does profiling before a
4817 function prologue and a secure plt pic call stubs needs
4818 r30 to be set up. */
4819 htab->plt_type = PLT_OLD;
4820 }
4821 else
4822 {
4823 bfd *ibfd;
4824 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4825
4826 /* Look through the reloc flags left by ppc_elf_check_relocs.
4827 Use the old style bss plt if a file makes plt calls
4828 without using the new relocs, and if ld isn't given
4829 --secure-plt and we never see REL16 relocs. */
4830 if (plt_type == PLT_UNSET)
4831 plt_type = PLT_OLD;
4832 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4833 if (is_ppc_elf (ibfd))
4834 {
4835 if (ppc_elf_tdata (ibfd)->has_rel16)
4836 plt_type = PLT_NEW;
4837 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4838 {
4839 plt_type = PLT_OLD;
4840 htab->old_bfd = ibfd;
4841 break;
4842 }
4843 }
4844 htab->plt_type = plt_type;
4845 }
4846 }
4847 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4848 {
4849 if (htab->old_bfd != NULL)
4850 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4851 htab->old_bfd);
4852 else
4853 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4854 }
4855
4856 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4857
4858 if (htab->plt_type == PLT_NEW)
4859 {
4860 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4861 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4862
4863 /* The new PLT is a loaded section. */
4864 if (htab->plt != NULL
4865 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4866 return -1;
4867
4868 /* The new GOT is not executable. */
4869 if (htab->got != NULL
4870 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4871 return -1;
4872 }
4873 else
4874 {
4875 /* Stop an unused .glink section from affecting .text alignment. */
4876 if (htab->glink != NULL
4877 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4878 return -1;
4879 }
4880 return htab->plt_type == PLT_NEW;
4881 }
4882
4883 /* Return the section that should be marked against GC for a given
4884 relocation. */
4885
4886 static asection *
ppc_elf_gc_mark_hook(asection * sec,struct bfd_link_info * info,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)4887 ppc_elf_gc_mark_hook (asection *sec,
4888 struct bfd_link_info *info,
4889 Elf_Internal_Rela *rel,
4890 struct elf_link_hash_entry *h,
4891 Elf_Internal_Sym *sym)
4892 {
4893 if (h != NULL)
4894 switch (ELF32_R_TYPE (rel->r_info))
4895 {
4896 case R_PPC_GNU_VTINHERIT:
4897 case R_PPC_GNU_VTENTRY:
4898 return NULL;
4899 }
4900
4901 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4902 }
4903
4904 /* Update the got, plt and dynamic reloc reference counts for the
4905 section being removed. */
4906
4907 static bfd_boolean
ppc_elf_gc_sweep_hook(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)4908 ppc_elf_gc_sweep_hook (bfd *abfd,
4909 struct bfd_link_info *info,
4910 asection *sec,
4911 const Elf_Internal_Rela *relocs)
4912 {
4913 struct ppc_elf_link_hash_table *htab;
4914 Elf_Internal_Shdr *symtab_hdr;
4915 struct elf_link_hash_entry **sym_hashes;
4916 bfd_signed_vma *local_got_refcounts;
4917 const Elf_Internal_Rela *rel, *relend;
4918 asection *got2;
4919
4920 if (info->relocatable)
4921 return TRUE;
4922
4923 if ((sec->flags & SEC_ALLOC) == 0)
4924 return TRUE;
4925
4926 elf_section_data (sec)->local_dynrel = NULL;
4927
4928 htab = ppc_elf_hash_table (info);
4929 symtab_hdr = &elf_symtab_hdr (abfd);
4930 sym_hashes = elf_sym_hashes (abfd);
4931 local_got_refcounts = elf_local_got_refcounts (abfd);
4932 got2 = bfd_get_section_by_name (abfd, ".got2");
4933
4934 relend = relocs + sec->reloc_count;
4935 for (rel = relocs; rel < relend; rel++)
4936 {
4937 unsigned long r_symndx;
4938 enum elf_ppc_reloc_type r_type;
4939 struct elf_link_hash_entry *h = NULL;
4940
4941 r_symndx = ELF32_R_SYM (rel->r_info);
4942 if (r_symndx >= symtab_hdr->sh_info)
4943 {
4944 struct elf_dyn_relocs **pp, *p;
4945 struct ppc_elf_link_hash_entry *eh;
4946
4947 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4948 while (h->root.type == bfd_link_hash_indirect
4949 || h->root.type == bfd_link_hash_warning)
4950 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4951 eh = (struct ppc_elf_link_hash_entry *) h;
4952
4953 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4954 if (p->sec == sec)
4955 {
4956 /* Everything must go for SEC. */
4957 *pp = p->next;
4958 break;
4959 }
4960 }
4961
4962 r_type = ELF32_R_TYPE (rel->r_info);
4963 if (!htab->is_vxworks
4964 && h == NULL
4965 && local_got_refcounts != NULL
4966 && (!info->shared
4967 || is_branch_reloc (r_type)))
4968 {
4969 struct plt_entry **local_plt = (struct plt_entry **)
4970 (local_got_refcounts + symtab_hdr->sh_info);
4971 char *local_got_tls_masks = (char *)
4972 (local_plt + symtab_hdr->sh_info);
4973 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4974 {
4975 struct plt_entry **ifunc = local_plt + r_symndx;
4976 bfd_vma addend = 0;
4977 struct plt_entry *ent;
4978
4979 if (r_type == R_PPC_PLTREL24 && info->shared)
4980 addend = rel->r_addend;
4981 ent = find_plt_ent (ifunc, got2, addend);
4982 if (ent->plt.refcount > 0)
4983 ent->plt.refcount -= 1;
4984 continue;
4985 }
4986 }
4987
4988 switch (r_type)
4989 {
4990 case R_PPC_GOT_TLSLD16:
4991 case R_PPC_GOT_TLSLD16_LO:
4992 case R_PPC_GOT_TLSLD16_HI:
4993 case R_PPC_GOT_TLSLD16_HA:
4994 case R_PPC_GOT_TLSGD16:
4995 case R_PPC_GOT_TLSGD16_LO:
4996 case R_PPC_GOT_TLSGD16_HI:
4997 case R_PPC_GOT_TLSGD16_HA:
4998 case R_PPC_GOT_TPREL16:
4999 case R_PPC_GOT_TPREL16_LO:
5000 case R_PPC_GOT_TPREL16_HI:
5001 case R_PPC_GOT_TPREL16_HA:
5002 case R_PPC_GOT_DTPREL16:
5003 case R_PPC_GOT_DTPREL16_LO:
5004 case R_PPC_GOT_DTPREL16_HI:
5005 case R_PPC_GOT_DTPREL16_HA:
5006 case R_PPC_GOT16:
5007 case R_PPC_GOT16_LO:
5008 case R_PPC_GOT16_HI:
5009 case R_PPC_GOT16_HA:
5010 if (h != NULL)
5011 {
5012 if (h->got.refcount > 0)
5013 h->got.refcount--;
5014 if (!info->shared)
5015 {
5016 struct plt_entry *ent;
5017
5018 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5019 if (ent != NULL && ent->plt.refcount > 0)
5020 ent->plt.refcount -= 1;
5021 }
5022 }
5023 else if (local_got_refcounts != NULL)
5024 {
5025 if (local_got_refcounts[r_symndx] > 0)
5026 local_got_refcounts[r_symndx]--;
5027 }
5028 break;
5029
5030 case R_PPC_REL24:
5031 case R_PPC_REL14:
5032 case R_PPC_REL14_BRTAKEN:
5033 case R_PPC_REL14_BRNTAKEN:
5034 case R_PPC_REL32:
5035 if (h == NULL || h == htab->elf.hgot)
5036 break;
5037 /* Fall thru */
5038
5039 case R_PPC_ADDR32:
5040 case R_PPC_ADDR24:
5041 case R_PPC_ADDR16:
5042 case R_PPC_ADDR16_LO:
5043 case R_PPC_ADDR16_HI:
5044 case R_PPC_ADDR16_HA:
5045 case R_PPC_ADDR14:
5046 case R_PPC_ADDR14_BRTAKEN:
5047 case R_PPC_ADDR14_BRNTAKEN:
5048 case R_PPC_UADDR32:
5049 case R_PPC_UADDR16:
5050 if (info->shared)
5051 break;
5052
5053 case R_PPC_PLT32:
5054 case R_PPC_PLTREL24:
5055 case R_PPC_PLTREL32:
5056 case R_PPC_PLT16_LO:
5057 case R_PPC_PLT16_HI:
5058 case R_PPC_PLT16_HA:
5059 if (h != NULL)
5060 {
5061 bfd_vma addend = 0;
5062 struct plt_entry *ent;
5063
5064 if (r_type == R_PPC_PLTREL24 && info->shared)
5065 addend = rel->r_addend;
5066 ent = find_plt_ent (&h->plt.plist, got2, addend);
5067 if (ent != NULL && ent->plt.refcount > 0)
5068 ent->plt.refcount -= 1;
5069 }
5070 break;
5071
5072 default:
5073 break;
5074 }
5075 }
5076 return TRUE;
5077 }
5078
5079 /* Set plt output section type, htab->tls_get_addr, and call the
5080 generic ELF tls_setup function. */
5081
5082 asection *
ppc_elf_tls_setup(bfd * obfd,struct bfd_link_info * info)5083 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5084 {
5085 struct ppc_elf_link_hash_table *htab;
5086
5087 htab = ppc_elf_hash_table (info);
5088 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5089 FALSE, FALSE, TRUE);
5090 if (!htab->params->no_tls_get_addr_opt)
5091 {
5092 struct elf_link_hash_entry *opt, *tga;
5093 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5094 FALSE, FALSE, TRUE);
5095 if (opt != NULL
5096 && (opt->root.type == bfd_link_hash_defined
5097 || opt->root.type == bfd_link_hash_defweak))
5098 {
5099 /* If glibc supports an optimized __tls_get_addr call stub,
5100 signalled by the presence of __tls_get_addr_opt, and we'll
5101 be calling __tls_get_addr via a plt call stub, then
5102 make __tls_get_addr point to __tls_get_addr_opt. */
5103 tga = htab->tls_get_addr;
5104 if (htab->elf.dynamic_sections_created
5105 && tga != NULL
5106 && (tga->type == STT_FUNC
5107 || tga->needs_plt)
5108 && !(SYMBOL_CALLS_LOCAL (info, tga)
5109 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5110 && tga->root.type == bfd_link_hash_undefweak)))
5111 {
5112 struct plt_entry *ent;
5113 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5114 if (ent->plt.refcount > 0)
5115 break;
5116 if (ent != NULL)
5117 {
5118 tga->root.type = bfd_link_hash_indirect;
5119 tga->root.u.i.link = &opt->root;
5120 ppc_elf_copy_indirect_symbol (info, opt, tga);
5121 if (opt->dynindx != -1)
5122 {
5123 /* Use __tls_get_addr_opt in dynamic relocations. */
5124 opt->dynindx = -1;
5125 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5126 opt->dynstr_index);
5127 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5128 return FALSE;
5129 }
5130 htab->tls_get_addr = opt;
5131 }
5132 }
5133 }
5134 else
5135 htab->params->no_tls_get_addr_opt = TRUE;
5136 }
5137 if (htab->plt_type == PLT_NEW
5138 && htab->plt != NULL
5139 && htab->plt->output_section != NULL)
5140 {
5141 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5142 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5143 }
5144
5145 return _bfd_elf_tls_setup (obfd, info);
5146 }
5147
5148 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5149 HASH. */
5150
5151 static bfd_boolean
branch_reloc_hash_match(const bfd * ibfd,const Elf_Internal_Rela * rel,const struct elf_link_hash_entry * hash)5152 branch_reloc_hash_match (const bfd *ibfd,
5153 const Elf_Internal_Rela *rel,
5154 const struct elf_link_hash_entry *hash)
5155 {
5156 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5157 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5158 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5159
5160 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5161 {
5162 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5163 struct elf_link_hash_entry *h;
5164
5165 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5166 while (h->root.type == bfd_link_hash_indirect
5167 || h->root.type == bfd_link_hash_warning)
5168 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5169 if (h == hash)
5170 return TRUE;
5171 }
5172 return FALSE;
5173 }
5174
5175 /* Run through all the TLS relocs looking for optimization
5176 opportunities. */
5177
5178 bfd_boolean
ppc_elf_tls_optimize(bfd * obfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)5179 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5180 struct bfd_link_info *info)
5181 {
5182 bfd *ibfd;
5183 asection *sec;
5184 struct ppc_elf_link_hash_table *htab;
5185 int pass;
5186
5187 if (info->relocatable || !info->executable)
5188 return TRUE;
5189
5190 htab = ppc_elf_hash_table (info);
5191 if (htab == NULL)
5192 return FALSE;
5193
5194 /* Make two passes through the relocs. First time check that tls
5195 relocs involved in setting up a tls_get_addr call are indeed
5196 followed by such a call. If they are not, don't do any tls
5197 optimization. On the second pass twiddle tls_mask flags to
5198 notify relocate_section that optimization can be done, and
5199 adjust got and plt refcounts. */
5200 for (pass = 0; pass < 2; ++pass)
5201 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5202 {
5203 Elf_Internal_Sym *locsyms = NULL;
5204 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5205 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5206
5207 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5208 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5209 {
5210 Elf_Internal_Rela *relstart, *rel, *relend;
5211 int expecting_tls_get_addr = 0;
5212
5213 /* Read the relocations. */
5214 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5215 info->keep_memory);
5216 if (relstart == NULL)
5217 return FALSE;
5218
5219 relend = relstart + sec->reloc_count;
5220 for (rel = relstart; rel < relend; rel++)
5221 {
5222 enum elf_ppc_reloc_type r_type;
5223 unsigned long r_symndx;
5224 struct elf_link_hash_entry *h = NULL;
5225 char *tls_mask;
5226 char tls_set, tls_clear;
5227 bfd_boolean is_local;
5228 bfd_signed_vma *got_count;
5229
5230 r_symndx = ELF32_R_SYM (rel->r_info);
5231 if (r_symndx >= symtab_hdr->sh_info)
5232 {
5233 struct elf_link_hash_entry **sym_hashes;
5234
5235 sym_hashes = elf_sym_hashes (ibfd);
5236 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5237 while (h->root.type == bfd_link_hash_indirect
5238 || h->root.type == bfd_link_hash_warning)
5239 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5240 }
5241
5242 is_local = FALSE;
5243 if (h == NULL
5244 || !h->def_dynamic)
5245 is_local = TRUE;
5246
5247 r_type = ELF32_R_TYPE (rel->r_info);
5248 /* If this section has old-style __tls_get_addr calls
5249 without marker relocs, then check that each
5250 __tls_get_addr call reloc is preceded by a reloc
5251 that conceivably belongs to the __tls_get_addr arg
5252 setup insn. If we don't find matching arg setup
5253 relocs, don't do any tls optimization. */
5254 if (pass == 0
5255 && sec->has_tls_get_addr_call
5256 && h != NULL
5257 && h == htab->tls_get_addr
5258 && !expecting_tls_get_addr
5259 && is_branch_reloc (r_type))
5260 {
5261 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5262 "TLS optimization disabled\n",
5263 ibfd, sec, rel->r_offset);
5264 if (elf_section_data (sec)->relocs != relstart)
5265 free (relstart);
5266 return TRUE;
5267 }
5268
5269 expecting_tls_get_addr = 0;
5270 switch (r_type)
5271 {
5272 case R_PPC_GOT_TLSLD16:
5273 case R_PPC_GOT_TLSLD16_LO:
5274 expecting_tls_get_addr = 1;
5275 /* Fall thru */
5276
5277 case R_PPC_GOT_TLSLD16_HI:
5278 case R_PPC_GOT_TLSLD16_HA:
5279 /* These relocs should never be against a symbol
5280 defined in a shared lib. Leave them alone if
5281 that turns out to be the case. */
5282 if (!is_local)
5283 continue;
5284
5285 /* LD -> LE */
5286 tls_set = 0;
5287 tls_clear = TLS_LD;
5288 break;
5289
5290 case R_PPC_GOT_TLSGD16:
5291 case R_PPC_GOT_TLSGD16_LO:
5292 expecting_tls_get_addr = 1;
5293 /* Fall thru */
5294
5295 case R_PPC_GOT_TLSGD16_HI:
5296 case R_PPC_GOT_TLSGD16_HA:
5297 if (is_local)
5298 /* GD -> LE */
5299 tls_set = 0;
5300 else
5301 /* GD -> IE */
5302 tls_set = TLS_TLS | TLS_TPRELGD;
5303 tls_clear = TLS_GD;
5304 break;
5305
5306 case R_PPC_GOT_TPREL16:
5307 case R_PPC_GOT_TPREL16_LO:
5308 case R_PPC_GOT_TPREL16_HI:
5309 case R_PPC_GOT_TPREL16_HA:
5310 if (is_local)
5311 {
5312 /* IE -> LE */
5313 tls_set = 0;
5314 tls_clear = TLS_TPREL;
5315 break;
5316 }
5317 else
5318 continue;
5319
5320 case R_PPC_TLSGD:
5321 case R_PPC_TLSLD:
5322 expecting_tls_get_addr = 2;
5323 tls_set = 0;
5324 tls_clear = 0;
5325 break;
5326
5327 default:
5328 continue;
5329 }
5330
5331 if (pass == 0)
5332 {
5333 if (!expecting_tls_get_addr
5334 || (expecting_tls_get_addr == 1
5335 && !sec->has_tls_get_addr_call))
5336 continue;
5337
5338 if (rel + 1 < relend
5339 && branch_reloc_hash_match (ibfd, rel + 1,
5340 htab->tls_get_addr))
5341 continue;
5342
5343 /* Uh oh, we didn't find the expected call. We
5344 could just mark this symbol to exclude it
5345 from tls optimization but it's safer to skip
5346 the entire optimization. */
5347 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5348 "TLS optimization disabled\n"),
5349 ibfd, sec, rel->r_offset);
5350 if (elf_section_data (sec)->relocs != relstart)
5351 free (relstart);
5352 return TRUE;
5353 }
5354
5355 if (expecting_tls_get_addr)
5356 {
5357 struct plt_entry *ent;
5358 bfd_vma addend = 0;
5359
5360 if (info->shared
5361 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5362 addend = rel[1].r_addend;
5363 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5364 got2, addend);
5365 if (ent != NULL && ent->plt.refcount > 0)
5366 ent->plt.refcount -= 1;
5367
5368 if (expecting_tls_get_addr == 2)
5369 continue;
5370 }
5371
5372 if (h != NULL)
5373 {
5374 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5375 got_count = &h->got.refcount;
5376 }
5377 else
5378 {
5379 bfd_signed_vma *lgot_refs;
5380 struct plt_entry **local_plt;
5381 char *lgot_masks;
5382
5383 if (locsyms == NULL)
5384 {
5385 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5386 if (locsyms == NULL)
5387 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5388 symtab_hdr->sh_info,
5389 0, NULL, NULL, NULL);
5390 if (locsyms == NULL)
5391 {
5392 if (elf_section_data (sec)->relocs != relstart)
5393 free (relstart);
5394 return FALSE;
5395 }
5396 }
5397 lgot_refs = elf_local_got_refcounts (ibfd);
5398 if (lgot_refs == NULL)
5399 abort ();
5400 local_plt = (struct plt_entry **)
5401 (lgot_refs + symtab_hdr->sh_info);
5402 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5403 tls_mask = &lgot_masks[r_symndx];
5404 got_count = &lgot_refs[r_symndx];
5405 }
5406
5407 if (tls_set == 0)
5408 {
5409 /* We managed to get rid of a got entry. */
5410 if (*got_count > 0)
5411 *got_count -= 1;
5412 }
5413
5414 *tls_mask |= tls_set;
5415 *tls_mask &= ~tls_clear;
5416 }
5417
5418 if (elf_section_data (sec)->relocs != relstart)
5419 free (relstart);
5420 }
5421
5422 if (locsyms != NULL
5423 && (symtab_hdr->contents != (unsigned char *) locsyms))
5424 {
5425 if (!info->keep_memory)
5426 free (locsyms);
5427 else
5428 symtab_hdr->contents = (unsigned char *) locsyms;
5429 }
5430 }
5431 return TRUE;
5432 }
5433
5434 /* Return true if we have dynamic relocs that apply to read-only sections. */
5435
5436 static bfd_boolean
readonly_dynrelocs(struct elf_link_hash_entry * h)5437 readonly_dynrelocs (struct elf_link_hash_entry *h)
5438 {
5439 struct elf_dyn_relocs *p;
5440
5441 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5442 {
5443 asection *s = p->sec->output_section;
5444
5445 if (s != NULL
5446 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5447 == (SEC_READONLY | SEC_ALLOC)))
5448 return TRUE;
5449 }
5450 return FALSE;
5451 }
5452
5453 /* Adjust a symbol defined by a dynamic object and referenced by a
5454 regular object. The current definition is in some section of the
5455 dynamic object, but we're not including those sections. We have to
5456 change the definition to something the rest of the link can
5457 understand. */
5458
5459 static bfd_boolean
ppc_elf_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)5460 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5461 struct elf_link_hash_entry *h)
5462 {
5463 struct ppc_elf_link_hash_table *htab;
5464 asection *s;
5465
5466 #ifdef DEBUG
5467 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5468 h->root.root.string);
5469 #endif
5470
5471 /* Make sure we know what is going on here. */
5472 htab = ppc_elf_hash_table (info);
5473 BFD_ASSERT (htab->elf.dynobj != NULL
5474 && (h->needs_plt
5475 || h->type == STT_GNU_IFUNC
5476 || h->u.weakdef != NULL
5477 || (h->def_dynamic
5478 && h->ref_regular
5479 && !h->def_regular)));
5480
5481 /* Deal with function syms. */
5482 if (h->type == STT_FUNC
5483 || h->type == STT_GNU_IFUNC
5484 || h->needs_plt)
5485 {
5486 /* Clear procedure linkage table information for any symbol that
5487 won't need a .plt entry. */
5488 struct plt_entry *ent;
5489 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5490 if (ent->plt.refcount > 0)
5491 break;
5492 if (ent == NULL
5493 || (h->type != STT_GNU_IFUNC
5494 && (SYMBOL_CALLS_LOCAL (info, h)
5495 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5496 && h->root.type == bfd_link_hash_undefweak))))
5497 {
5498 /* A PLT entry is not required/allowed when:
5499
5500 1. We are not using ld.so; because then the PLT entry
5501 can't be set up, so we can't use one. In this case,
5502 ppc_elf_adjust_dynamic_symbol won't even be called.
5503
5504 2. GC has rendered the entry unused.
5505
5506 3. We know for certain that a call to this symbol
5507 will go to this object, or will remain undefined. */
5508 h->plt.plist = NULL;
5509 h->needs_plt = 0;
5510 h->pointer_equality_needed = 0;
5511 }
5512 else
5513 {
5514 /* Taking a function's address in a read/write section
5515 doesn't require us to define the function symbol in the
5516 executable on a plt call stub. A dynamic reloc can
5517 be used instead. */
5518 if (h->pointer_equality_needed
5519 && h->type != STT_GNU_IFUNC
5520 && !htab->is_vxworks
5521 && !ppc_elf_hash_entry (h)->has_sda_refs
5522 && !readonly_dynrelocs (h))
5523 {
5524 h->pointer_equality_needed = 0;
5525 h->non_got_ref = 0;
5526 }
5527
5528 /* After adjust_dynamic_symbol, non_got_ref set in the
5529 non-shared case means that we have allocated space in
5530 .dynbss for the symbol and thus dyn_relocs for this
5531 symbol should be discarded.
5532 If we get here we know we are making a PLT entry for this
5533 symbol, and in an executable we'd normally resolve
5534 relocations against this symbol to the PLT entry. Allow
5535 dynamic relocs if the reference is weak, and the dynamic
5536 relocs will not cause text relocation. */
5537 else if (!h->ref_regular_nonweak
5538 && h->non_got_ref
5539 && h->type != STT_GNU_IFUNC
5540 && !htab->is_vxworks
5541 && !ppc_elf_hash_entry (h)->has_sda_refs
5542 && !readonly_dynrelocs (h))
5543 h->non_got_ref = 0;
5544 }
5545 return TRUE;
5546 }
5547 else
5548 h->plt.plist = NULL;
5549
5550 /* If this is a weak symbol, and there is a real definition, the
5551 processor independent code will have arranged for us to see the
5552 real definition first, and we can just use the same value. */
5553 if (h->u.weakdef != NULL)
5554 {
5555 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5556 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5557 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5558 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5559 if (ELIMINATE_COPY_RELOCS)
5560 h->non_got_ref = h->u.weakdef->non_got_ref;
5561 return TRUE;
5562 }
5563
5564 /* This is a reference to a symbol defined by a dynamic object which
5565 is not a function. */
5566
5567 /* If we are creating a shared library, we must presume that the
5568 only references to the symbol are via the global offset table.
5569 For such cases we need not do anything here; the relocations will
5570 be handled correctly by relocate_section. */
5571 if (info->shared)
5572 return TRUE;
5573
5574 /* If there are no references to this symbol that do not use the
5575 GOT, we don't need to generate a copy reloc. */
5576 if (!h->non_got_ref)
5577 return TRUE;
5578
5579 /* If we didn't find any dynamic relocs in read-only sections, then
5580 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5581 We can't do this if there are any small data relocations. This
5582 doesn't work on VxWorks, where we can not have dynamic
5583 relocations (other than copy and jump slot relocations) in an
5584 executable. */
5585 if (ELIMINATE_COPY_RELOCS
5586 && !ppc_elf_hash_entry (h)->has_sda_refs
5587 && !htab->is_vxworks
5588 && !h->def_regular
5589 && !readonly_dynrelocs (h))
5590 {
5591 h->non_got_ref = 0;
5592 return TRUE;
5593 }
5594
5595 /* We must allocate the symbol in our .dynbss section, which will
5596 become part of the .bss section of the executable. There will be
5597 an entry for this symbol in the .dynsym section. The dynamic
5598 object will contain position independent code, so all references
5599 from the dynamic object to this symbol will go through the global
5600 offset table. The dynamic linker will use the .dynsym entry to
5601 determine the address it must put in the global offset table, so
5602 both the dynamic object and the regular object will refer to the
5603 same memory location for the variable.
5604
5605 Of course, if the symbol is referenced using SDAREL relocs, we
5606 must instead allocate it in .sbss. */
5607
5608 if (ppc_elf_hash_entry (h)->has_sda_refs)
5609 s = htab->dynsbss;
5610 else
5611 s = htab->dynbss;
5612 BFD_ASSERT (s != NULL);
5613
5614 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5615 copy the initial value out of the dynamic object and into the
5616 runtime process image. We need to remember the offset into the
5617 .rela.bss section we are going to use. */
5618 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5619 {
5620 asection *srel;
5621
5622 if (ppc_elf_hash_entry (h)->has_sda_refs)
5623 srel = htab->relsbss;
5624 else
5625 srel = htab->relbss;
5626 BFD_ASSERT (srel != NULL);
5627 srel->size += sizeof (Elf32_External_Rela);
5628 h->needs_copy = 1;
5629 }
5630
5631 return _bfd_elf_adjust_dynamic_copy (h, s);
5632 }
5633
5634 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5635 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5636 specifying the addend on the plt relocation. For -fpic code, the sym
5637 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5638 xxxxxxxx.got2.plt_pic32.<callee>. */
5639
5640 static bfd_boolean
add_stub_sym(struct plt_entry * ent,struct elf_link_hash_entry * h,struct bfd_link_info * info)5641 add_stub_sym (struct plt_entry *ent,
5642 struct elf_link_hash_entry *h,
5643 struct bfd_link_info *info)
5644 {
5645 struct elf_link_hash_entry *sh;
5646 size_t len1, len2, len3;
5647 char *name;
5648 const char *stub;
5649 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5650
5651 if (info->shared)
5652 stub = ".plt_pic32.";
5653 else
5654 stub = ".plt_call32.";
5655
5656 len1 = strlen (h->root.root.string);
5657 len2 = strlen (stub);
5658 len3 = 0;
5659 if (ent->sec)
5660 len3 = strlen (ent->sec->name);
5661 name = bfd_malloc (len1 + len2 + len3 + 9);
5662 if (name == NULL)
5663 return FALSE;
5664 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5665 if (ent->sec)
5666 memcpy (name + 8, ent->sec->name, len3);
5667 memcpy (name + 8 + len3, stub, len2);
5668 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5669 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5670 if (sh == NULL)
5671 return FALSE;
5672 if (sh->root.type == bfd_link_hash_new)
5673 {
5674 sh->root.type = bfd_link_hash_defined;
5675 sh->root.u.def.section = htab->glink;
5676 sh->root.u.def.value = ent->glink_offset;
5677 sh->ref_regular = 1;
5678 sh->def_regular = 1;
5679 sh->ref_regular_nonweak = 1;
5680 sh->forced_local = 1;
5681 sh->non_elf = 0;
5682 }
5683 return TRUE;
5684 }
5685
5686 /* Allocate NEED contiguous space in .got, and return the offset.
5687 Handles allocation of the got header when crossing 32k. */
5688
5689 static bfd_vma
allocate_got(struct ppc_elf_link_hash_table * htab,unsigned int need)5690 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5691 {
5692 bfd_vma where;
5693 unsigned int max_before_header;
5694
5695 if (htab->plt_type == PLT_VXWORKS)
5696 {
5697 where = htab->got->size;
5698 htab->got->size += need;
5699 }
5700 else
5701 {
5702 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5703 if (need <= htab->got_gap)
5704 {
5705 where = max_before_header - htab->got_gap;
5706 htab->got_gap -= need;
5707 }
5708 else
5709 {
5710 if (htab->got->size + need > max_before_header
5711 && htab->got->size <= max_before_header)
5712 {
5713 htab->got_gap = max_before_header - htab->got->size;
5714 htab->got->size = max_before_header + htab->got_header_size;
5715 }
5716 where = htab->got->size;
5717 htab->got->size += need;
5718 }
5719 }
5720 return where;
5721 }
5722
5723 /* Allocate space in associated reloc sections for dynamic relocs. */
5724
5725 static bfd_boolean
allocate_dynrelocs(struct elf_link_hash_entry * h,void * inf)5726 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5727 {
5728 struct bfd_link_info *info = inf;
5729 struct ppc_elf_link_hash_entry *eh;
5730 struct ppc_elf_link_hash_table *htab;
5731 struct elf_dyn_relocs *p;
5732
5733 if (h->root.type == bfd_link_hash_indirect)
5734 return TRUE;
5735
5736 htab = ppc_elf_hash_table (info);
5737 if (htab->elf.dynamic_sections_created
5738 || h->type == STT_GNU_IFUNC)
5739 {
5740 struct plt_entry *ent;
5741 bfd_boolean doneone = FALSE;
5742 bfd_vma plt_offset = 0, glink_offset = 0;
5743 bfd_boolean dyn;
5744
5745 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5746 if (ent->plt.refcount > 0)
5747 {
5748 /* Make sure this symbol is output as a dynamic symbol. */
5749 if (h->dynindx == -1
5750 && !h->forced_local
5751 && !h->def_regular
5752 && htab->elf.dynamic_sections_created)
5753 {
5754 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5755 return FALSE;
5756 }
5757
5758 dyn = htab->elf.dynamic_sections_created;
5759 if (info->shared
5760 || h->type == STT_GNU_IFUNC
5761 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5762 {
5763 asection *s = htab->plt;
5764 if (!dyn || h->dynindx == -1)
5765 s = htab->iplt;
5766
5767 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5768 {
5769 if (!doneone)
5770 {
5771 plt_offset = s->size;
5772 s->size += 4;
5773 }
5774 ent->plt.offset = plt_offset;
5775
5776 s = htab->glink;
5777 if (!doneone || info->shared)
5778 {
5779 glink_offset = s->size;
5780 s->size += GLINK_ENTRY_SIZE;
5781 if (h == htab->tls_get_addr
5782 && !htab->params->no_tls_get_addr_opt)
5783 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5784 }
5785 if (!doneone
5786 && !info->shared
5787 && h->def_dynamic
5788 && !h->def_regular)
5789 {
5790 h->root.u.def.section = s;
5791 h->root.u.def.value = glink_offset;
5792 }
5793 ent->glink_offset = glink_offset;
5794
5795 if (htab->params->emit_stub_syms
5796 && !add_stub_sym (ent, h, info))
5797 return FALSE;
5798 }
5799 else
5800 {
5801 if (!doneone)
5802 {
5803 /* If this is the first .plt entry, make room
5804 for the special first entry. */
5805 if (s->size == 0)
5806 s->size += htab->plt_initial_entry_size;
5807
5808 /* The PowerPC PLT is actually composed of two
5809 parts, the first part is 2 words (for a load
5810 and a jump), and then there is a remaining
5811 word available at the end. */
5812 plt_offset = (htab->plt_initial_entry_size
5813 + (htab->plt_slot_size
5814 * ((s->size
5815 - htab->plt_initial_entry_size)
5816 / htab->plt_entry_size)));
5817
5818 /* If this symbol is not defined in a regular
5819 file, and we are not generating a shared
5820 library, then set the symbol to this location
5821 in the .plt. This is to avoid text
5822 relocations, and is required to make
5823 function pointers compare as equal between
5824 the normal executable and the shared library. */
5825 if (! info->shared
5826 && h->def_dynamic
5827 && !h->def_regular)
5828 {
5829 h->root.u.def.section = s;
5830 h->root.u.def.value = plt_offset;
5831 }
5832
5833 /* Make room for this entry. */
5834 s->size += htab->plt_entry_size;
5835 /* After the 8192nd entry, room for two entries
5836 is allocated. */
5837 if (htab->plt_type == PLT_OLD
5838 && (s->size - htab->plt_initial_entry_size)
5839 / htab->plt_entry_size
5840 > PLT_NUM_SINGLE_ENTRIES)
5841 s->size += htab->plt_entry_size;
5842 }
5843 ent->plt.offset = plt_offset;
5844 }
5845
5846 /* We also need to make an entry in the .rela.plt section. */
5847 if (!doneone)
5848 {
5849 if (!htab->elf.dynamic_sections_created
5850 || h->dynindx == -1)
5851 htab->reliplt->size += sizeof (Elf32_External_Rela);
5852 else
5853 {
5854 htab->relplt->size += sizeof (Elf32_External_Rela);
5855
5856 if (htab->plt_type == PLT_VXWORKS)
5857 {
5858 /* Allocate space for the unloaded relocations. */
5859 if (!info->shared
5860 && htab->elf.dynamic_sections_created)
5861 {
5862 if (ent->plt.offset
5863 == (bfd_vma) htab->plt_initial_entry_size)
5864 {
5865 htab->srelplt2->size
5866 += (sizeof (Elf32_External_Rela)
5867 * VXWORKS_PLTRESOLVE_RELOCS);
5868 }
5869
5870 htab->srelplt2->size
5871 += (sizeof (Elf32_External_Rela)
5872 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5873 }
5874
5875 /* Every PLT entry has an associated GOT entry in
5876 .got.plt. */
5877 htab->sgotplt->size += 4;
5878 }
5879 }
5880 doneone = TRUE;
5881 }
5882 }
5883 else
5884 ent->plt.offset = (bfd_vma) -1;
5885 }
5886 else
5887 ent->plt.offset = (bfd_vma) -1;
5888
5889 if (!doneone)
5890 {
5891 h->plt.plist = NULL;
5892 h->needs_plt = 0;
5893 }
5894 }
5895 else
5896 {
5897 h->plt.plist = NULL;
5898 h->needs_plt = 0;
5899 }
5900
5901 eh = (struct ppc_elf_link_hash_entry *) h;
5902 if (eh->elf.got.refcount > 0)
5903 {
5904 bfd_boolean dyn;
5905 unsigned int need;
5906
5907 /* Make sure this symbol is output as a dynamic symbol. */
5908 if (eh->elf.dynindx == -1
5909 && !eh->elf.forced_local
5910 && eh->elf.type != STT_GNU_IFUNC
5911 && htab->elf.dynamic_sections_created)
5912 {
5913 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5914 return FALSE;
5915 }
5916
5917 need = 0;
5918 if ((eh->tls_mask & TLS_TLS) != 0)
5919 {
5920 if ((eh->tls_mask & TLS_LD) != 0)
5921 {
5922 if (!eh->elf.def_dynamic)
5923 /* We'll just use htab->tlsld_got.offset. This should
5924 always be the case. It's a little odd if we have
5925 a local dynamic reloc against a non-local symbol. */
5926 htab->tlsld_got.refcount += 1;
5927 else
5928 need += 8;
5929 }
5930 if ((eh->tls_mask & TLS_GD) != 0)
5931 need += 8;
5932 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5933 need += 4;
5934 if ((eh->tls_mask & TLS_DTPREL) != 0)
5935 need += 4;
5936 }
5937 else
5938 need += 4;
5939 if (need == 0)
5940 eh->elf.got.offset = (bfd_vma) -1;
5941 else
5942 {
5943 eh->elf.got.offset = allocate_got (htab, need);
5944 dyn = htab->elf.dynamic_sections_created;
5945 if ((info->shared
5946 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5947 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5948 || eh->elf.root.type != bfd_link_hash_undefweak))
5949 {
5950 asection *rsec = htab->relgot;
5951
5952 if (eh->elf.type == STT_GNU_IFUNC)
5953 rsec = htab->reliplt;
5954 /* All the entries we allocated need relocs.
5955 Except LD only needs one. */
5956 if ((eh->tls_mask & TLS_LD) != 0
5957 && eh->elf.def_dynamic)
5958 need -= 4;
5959 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5960 }
5961 }
5962 }
5963 else
5964 eh->elf.got.offset = (bfd_vma) -1;
5965
5966 if (eh->dyn_relocs == NULL
5967 || !htab->elf.dynamic_sections_created)
5968 return TRUE;
5969
5970 /* In the shared -Bsymbolic case, discard space allocated for
5971 dynamic pc-relative relocs against symbols which turn out to be
5972 defined in regular objects. For the normal shared case, discard
5973 space for relocs that have become local due to symbol visibility
5974 changes. */
5975
5976 if (info->shared)
5977 {
5978 /* Relocs that use pc_count are those that appear on a call insn,
5979 or certain REL relocs (see must_be_dyn_reloc) that can be
5980 generated via assembly. We want calls to protected symbols to
5981 resolve directly to the function rather than going via the plt.
5982 If people want function pointer comparisons to work as expected
5983 then they should avoid writing weird assembly. */
5984 if (SYMBOL_CALLS_LOCAL (info, h))
5985 {
5986 struct elf_dyn_relocs **pp;
5987
5988 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5989 {
5990 p->count -= p->pc_count;
5991 p->pc_count = 0;
5992 if (p->count == 0)
5993 *pp = p->next;
5994 else
5995 pp = &p->next;
5996 }
5997 }
5998
5999 if (htab->is_vxworks)
6000 {
6001 struct elf_dyn_relocs **pp;
6002
6003 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6004 {
6005 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6006 *pp = p->next;
6007 else
6008 pp = &p->next;
6009 }
6010 }
6011
6012 /* Discard relocs on undefined symbols that must be local. */
6013 if (eh->dyn_relocs != NULL
6014 && h->root.type == bfd_link_hash_undefined
6015 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6016 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6017 eh->dyn_relocs = NULL;
6018
6019 /* Also discard relocs on undefined weak syms with non-default
6020 visibility. */
6021 if (eh->dyn_relocs != NULL
6022 && h->root.type == bfd_link_hash_undefweak)
6023 {
6024 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6025 eh->dyn_relocs = NULL;
6026
6027 /* Make sure undefined weak symbols are output as a dynamic
6028 symbol in PIEs. */
6029 else if (h->dynindx == -1
6030 && !h->forced_local
6031 && !h->def_regular)
6032 {
6033 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6034 return FALSE;
6035 }
6036 }
6037 }
6038 else if (ELIMINATE_COPY_RELOCS)
6039 {
6040 /* For the non-shared case, discard space for relocs against
6041 symbols which turn out to need copy relocs or are not
6042 dynamic. */
6043
6044 if (!h->non_got_ref
6045 && !h->def_regular)
6046 {
6047 /* Make sure this symbol is output as a dynamic symbol.
6048 Undefined weak syms won't yet be marked as dynamic. */
6049 if (h->dynindx == -1
6050 && !h->forced_local)
6051 {
6052 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6053 return FALSE;
6054 }
6055
6056 /* If that succeeded, we know we'll be keeping all the
6057 relocs. */
6058 if (h->dynindx != -1)
6059 goto keep;
6060 }
6061
6062 eh->dyn_relocs = NULL;
6063
6064 keep: ;
6065 }
6066
6067 /* Finally, allocate space. */
6068 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6069 {
6070 asection *sreloc = elf_section_data (p->sec)->sreloc;
6071 if (eh->elf.type == STT_GNU_IFUNC)
6072 sreloc = htab->reliplt;
6073 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6074 }
6075
6076 return TRUE;
6077 }
6078
6079 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6080 read-only sections. */
6081
6082 static bfd_boolean
maybe_set_textrel(struct elf_link_hash_entry * h,void * info)6083 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6084 {
6085 if (h->root.type == bfd_link_hash_indirect)
6086 return TRUE;
6087
6088 if (readonly_dynrelocs (h))
6089 {
6090 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6091
6092 /* Not an error, just cut short the traversal. */
6093 return FALSE;
6094 }
6095 return TRUE;
6096 }
6097
6098 static const unsigned char glink_eh_frame_cie[] =
6099 {
6100 0, 0, 0, 16, /* length. */
6101 0, 0, 0, 0, /* id. */
6102 1, /* CIE version. */
6103 'z', 'R', 0, /* Augmentation string. */
6104 4, /* Code alignment. */
6105 0x7c, /* Data alignment. */
6106 65, /* RA reg. */
6107 1, /* Augmentation size. */
6108 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6109 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6110 };
6111
6112 /* Set the sizes of the dynamic sections. */
6113
6114 static bfd_boolean
ppc_elf_size_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)6115 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6116 struct bfd_link_info *info)
6117 {
6118 struct ppc_elf_link_hash_table *htab;
6119 asection *s;
6120 bfd_boolean relocs;
6121 bfd *ibfd;
6122
6123 #ifdef DEBUG
6124 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6125 #endif
6126
6127 htab = ppc_elf_hash_table (info);
6128 BFD_ASSERT (htab->elf.dynobj != NULL);
6129
6130 if (elf_hash_table (info)->dynamic_sections_created)
6131 {
6132 /* Set the contents of the .interp section to the interpreter. */
6133 if (info->executable)
6134 {
6135 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6136 BFD_ASSERT (s != NULL);
6137 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6138 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6139 }
6140 }
6141
6142 if (htab->plt_type == PLT_OLD)
6143 htab->got_header_size = 16;
6144 else if (htab->plt_type == PLT_NEW)
6145 htab->got_header_size = 12;
6146
6147 /* Set up .got offsets for local syms, and space for local dynamic
6148 relocs. */
6149 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6150 {
6151 bfd_signed_vma *local_got;
6152 bfd_signed_vma *end_local_got;
6153 struct plt_entry **local_plt;
6154 struct plt_entry **end_local_plt;
6155 char *lgot_masks;
6156 bfd_size_type locsymcount;
6157 Elf_Internal_Shdr *symtab_hdr;
6158
6159 if (!is_ppc_elf (ibfd))
6160 continue;
6161
6162 for (s = ibfd->sections; s != NULL; s = s->next)
6163 {
6164 struct ppc_dyn_relocs *p;
6165
6166 for (p = ((struct ppc_dyn_relocs *)
6167 elf_section_data (s)->local_dynrel);
6168 p != NULL;
6169 p = p->next)
6170 {
6171 if (!bfd_is_abs_section (p->sec)
6172 && bfd_is_abs_section (p->sec->output_section))
6173 {
6174 /* Input section has been discarded, either because
6175 it is a copy of a linkonce section or due to
6176 linker script /DISCARD/, so we'll be discarding
6177 the relocs too. */
6178 }
6179 else if (htab->is_vxworks
6180 && strcmp (p->sec->output_section->name,
6181 ".tls_vars") == 0)
6182 {
6183 /* Relocations in vxworks .tls_vars sections are
6184 handled specially by the loader. */
6185 }
6186 else if (p->count != 0)
6187 {
6188 asection *sreloc = elf_section_data (p->sec)->sreloc;
6189 if (p->ifunc)
6190 sreloc = htab->reliplt;
6191 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6192 if ((p->sec->output_section->flags
6193 & (SEC_READONLY | SEC_ALLOC))
6194 == (SEC_READONLY | SEC_ALLOC))
6195 info->flags |= DF_TEXTREL;
6196 }
6197 }
6198 }
6199
6200 local_got = elf_local_got_refcounts (ibfd);
6201 if (!local_got)
6202 continue;
6203
6204 symtab_hdr = &elf_symtab_hdr (ibfd);
6205 locsymcount = symtab_hdr->sh_info;
6206 end_local_got = local_got + locsymcount;
6207 local_plt = (struct plt_entry **) end_local_got;
6208 end_local_plt = local_plt + locsymcount;
6209 lgot_masks = (char *) end_local_plt;
6210
6211 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6212 if (*local_got > 0)
6213 {
6214 unsigned int need = 0;
6215 if ((*lgot_masks & TLS_TLS) != 0)
6216 {
6217 if ((*lgot_masks & TLS_GD) != 0)
6218 need += 8;
6219 if ((*lgot_masks & TLS_LD) != 0)
6220 htab->tlsld_got.refcount += 1;
6221 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6222 need += 4;
6223 if ((*lgot_masks & TLS_DTPREL) != 0)
6224 need += 4;
6225 }
6226 else
6227 need += 4;
6228 if (need == 0)
6229 *local_got = (bfd_vma) -1;
6230 else
6231 {
6232 *local_got = allocate_got (htab, need);
6233 if (info->shared)
6234 {
6235 asection *srel = htab->relgot;
6236 if ((*lgot_masks & PLT_IFUNC) != 0)
6237 srel = htab->reliplt;
6238 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6239 }
6240 }
6241 }
6242 else
6243 *local_got = (bfd_vma) -1;
6244
6245 if (htab->is_vxworks)
6246 continue;
6247
6248 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6249 for (; local_plt < end_local_plt; ++local_plt)
6250 {
6251 struct plt_entry *ent;
6252 bfd_boolean doneone = FALSE;
6253 bfd_vma plt_offset = 0, glink_offset = 0;
6254
6255 for (ent = *local_plt; ent != NULL; ent = ent->next)
6256 if (ent->plt.refcount > 0)
6257 {
6258 s = htab->iplt;
6259
6260 if (!doneone)
6261 {
6262 plt_offset = s->size;
6263 s->size += 4;
6264 }
6265 ent->plt.offset = plt_offset;
6266
6267 s = htab->glink;
6268 if (!doneone || info->shared)
6269 {
6270 glink_offset = s->size;
6271 s->size += GLINK_ENTRY_SIZE;
6272 }
6273 ent->glink_offset = glink_offset;
6274
6275 if (!doneone)
6276 {
6277 htab->reliplt->size += sizeof (Elf32_External_Rela);
6278 doneone = TRUE;
6279 }
6280 }
6281 else
6282 ent->plt.offset = (bfd_vma) -1;
6283 }
6284 }
6285
6286 /* Allocate space for global sym dynamic relocs. */
6287 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6288
6289 if (htab->tlsld_got.refcount > 0)
6290 {
6291 htab->tlsld_got.offset = allocate_got (htab, 8);
6292 if (info->shared)
6293 htab->relgot->size += sizeof (Elf32_External_Rela);
6294 }
6295 else
6296 htab->tlsld_got.offset = (bfd_vma) -1;
6297
6298 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6299 {
6300 unsigned int g_o_t = 32768;
6301
6302 /* If we haven't allocated the header, do so now. When we get here,
6303 for old plt/got the got size will be 0 to 32764 (not allocated),
6304 or 32780 to 65536 (header allocated). For new plt/got, the
6305 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6306 if (htab->got->size <= 32768)
6307 {
6308 g_o_t = htab->got->size;
6309 if (htab->plt_type == PLT_OLD)
6310 g_o_t += 4;
6311 htab->got->size += htab->got_header_size;
6312 }
6313
6314 htab->elf.hgot->root.u.def.value = g_o_t;
6315 }
6316 if (info->shared)
6317 {
6318 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6319
6320 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6321 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6322 }
6323 if (info->emitrelocations)
6324 {
6325 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6326
6327 if (sda != NULL && sda->ref_regular)
6328 sda->root.u.def.section->flags |= SEC_KEEP;
6329 sda = htab->sdata[1].sym;
6330 if (sda != NULL && sda->ref_regular)
6331 sda->root.u.def.section->flags |= SEC_KEEP;
6332 }
6333
6334 if (htab->glink != NULL
6335 && htab->glink->size != 0
6336 && htab->elf.dynamic_sections_created)
6337 {
6338 htab->glink_pltresolve = htab->glink->size;
6339 /* Space for the branch table. */
6340 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6341 /* Pad out to align the start of PLTresolve. */
6342 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6343 ? 63 : 15);
6344 htab->glink->size += GLINK_PLTRESOLVE;
6345
6346 if (htab->params->emit_stub_syms)
6347 {
6348 struct elf_link_hash_entry *sh;
6349 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6350 TRUE, FALSE, FALSE);
6351 if (sh == NULL)
6352 return FALSE;
6353 if (sh->root.type == bfd_link_hash_new)
6354 {
6355 sh->root.type = bfd_link_hash_defined;
6356 sh->root.u.def.section = htab->glink;
6357 sh->root.u.def.value = htab->glink_pltresolve;
6358 sh->ref_regular = 1;
6359 sh->def_regular = 1;
6360 sh->ref_regular_nonweak = 1;
6361 sh->forced_local = 1;
6362 sh->non_elf = 0;
6363 }
6364 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6365 TRUE, FALSE, FALSE);
6366 if (sh == NULL)
6367 return FALSE;
6368 if (sh->root.type == bfd_link_hash_new)
6369 {
6370 sh->root.type = bfd_link_hash_defined;
6371 sh->root.u.def.section = htab->glink;
6372 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6373 sh->ref_regular = 1;
6374 sh->def_regular = 1;
6375 sh->ref_regular_nonweak = 1;
6376 sh->forced_local = 1;
6377 sh->non_elf = 0;
6378 }
6379 }
6380 }
6381
6382 if (htab->glink != NULL
6383 && htab->glink->size != 0
6384 && htab->glink_eh_frame != NULL
6385 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6386 && _bfd_elf_eh_frame_present (info))
6387 {
6388 s = htab->glink_eh_frame;
6389 s->size = sizeof (glink_eh_frame_cie) + 20;
6390 if (info->shared)
6391 {
6392 s->size += 4;
6393 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6394 s->size += 4;
6395 }
6396 }
6397
6398 /* We've now determined the sizes of the various dynamic sections.
6399 Allocate memory for them. */
6400 relocs = FALSE;
6401 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6402 {
6403 bfd_boolean strip_section = TRUE;
6404
6405 if ((s->flags & SEC_LINKER_CREATED) == 0)
6406 continue;
6407
6408 if (s == htab->plt
6409 || s == htab->got)
6410 {
6411 /* We'd like to strip these sections if they aren't needed, but if
6412 we've exported dynamic symbols from them we must leave them.
6413 It's too late to tell BFD to get rid of the symbols. */
6414 if (htab->elf.hplt != NULL)
6415 strip_section = FALSE;
6416 /* Strip this section if we don't need it; see the
6417 comment below. */
6418 }
6419 else if (s == htab->iplt
6420 || s == htab->glink
6421 || s == htab->glink_eh_frame
6422 || s == htab->sgotplt
6423 || s == htab->sbss
6424 || s == htab->dynbss
6425 || s == htab->dynsbss)
6426 {
6427 /* Strip these too. */
6428 }
6429 else if (s == htab->sdata[0].section
6430 || s == htab->sdata[1].section)
6431 {
6432 strip_section = (s->flags & SEC_KEEP) == 0;
6433 }
6434 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6435 ".rela"))
6436 {
6437 if (s->size != 0)
6438 {
6439 /* Remember whether there are any relocation sections. */
6440 relocs = TRUE;
6441
6442 /* We use the reloc_count field as a counter if we need
6443 to copy relocs into the output file. */
6444 s->reloc_count = 0;
6445 }
6446 }
6447 else
6448 {
6449 /* It's not one of our sections, so don't allocate space. */
6450 continue;
6451 }
6452
6453 if (s->size == 0 && strip_section)
6454 {
6455 /* If we don't need this section, strip it from the
6456 output file. This is mostly to handle .rela.bss and
6457 .rela.plt. We must create both sections in
6458 create_dynamic_sections, because they must be created
6459 before the linker maps input sections to output
6460 sections. The linker does that before
6461 adjust_dynamic_symbol is called, and it is that
6462 function which decides whether anything needs to go
6463 into these sections. */
6464 s->flags |= SEC_EXCLUDE;
6465 continue;
6466 }
6467
6468 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6469 continue;
6470
6471 /* Allocate memory for the section contents. */
6472 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6473 if (s->contents == NULL)
6474 return FALSE;
6475 }
6476
6477 if (htab->elf.dynamic_sections_created)
6478 {
6479 /* Add some entries to the .dynamic section. We fill in the
6480 values later, in ppc_elf_finish_dynamic_sections, but we
6481 must add the entries now so that we get the correct size for
6482 the .dynamic section. The DT_DEBUG entry is filled in by the
6483 dynamic linker and used by the debugger. */
6484 #define add_dynamic_entry(TAG, VAL) \
6485 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6486
6487 if (info->executable)
6488 {
6489 if (!add_dynamic_entry (DT_DEBUG, 0))
6490 return FALSE;
6491 }
6492
6493 if (htab->plt != NULL && htab->plt->size != 0)
6494 {
6495 if (!add_dynamic_entry (DT_PLTGOT, 0)
6496 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6497 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6498 || !add_dynamic_entry (DT_JMPREL, 0))
6499 return FALSE;
6500 }
6501
6502 if (htab->plt_type == PLT_NEW
6503 && htab->glink != NULL
6504 && htab->glink->size != 0)
6505 {
6506 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6507 return FALSE;
6508 if (!htab->params->no_tls_get_addr_opt
6509 && htab->tls_get_addr != NULL
6510 && htab->tls_get_addr->plt.plist != NULL
6511 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6512 return FALSE;
6513 }
6514
6515 if (relocs)
6516 {
6517 if (!add_dynamic_entry (DT_RELA, 0)
6518 || !add_dynamic_entry (DT_RELASZ, 0)
6519 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6520 return FALSE;
6521 }
6522
6523 /* If any dynamic relocs apply to a read-only section, then we
6524 need a DT_TEXTREL entry. */
6525 if ((info->flags & DF_TEXTREL) == 0)
6526 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6527 info);
6528
6529 if ((info->flags & DF_TEXTREL) != 0)
6530 {
6531 if (!add_dynamic_entry (DT_TEXTREL, 0))
6532 return FALSE;
6533 }
6534 if (htab->is_vxworks
6535 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6536 return FALSE;
6537 }
6538 #undef add_dynamic_entry
6539
6540 if (htab->glink_eh_frame != NULL
6541 && htab->glink_eh_frame->contents != NULL)
6542 {
6543 unsigned char *p = htab->glink_eh_frame->contents;
6544 bfd_vma val;
6545
6546 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6547 /* CIE length (rewrite in case little-endian). */
6548 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6549 p += sizeof (glink_eh_frame_cie);
6550 /* FDE length. */
6551 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6552 bfd_put_32 (htab->elf.dynobj, val, p);
6553 p += 4;
6554 /* CIE pointer. */
6555 val = p - htab->glink_eh_frame->contents;
6556 bfd_put_32 (htab->elf.dynobj, val, p);
6557 p += 4;
6558 /* Offset to .glink. Set later. */
6559 p += 4;
6560 /* .glink size. */
6561 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6562 p += 4;
6563 /* Augmentation. */
6564 p += 1;
6565
6566 if (info->shared
6567 && htab->elf.dynamic_sections_created)
6568 {
6569 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6570 if (adv < 64)
6571 *p++ = DW_CFA_advance_loc + adv;
6572 else if (adv < 256)
6573 {
6574 *p++ = DW_CFA_advance_loc1;
6575 *p++ = adv;
6576 }
6577 else if (adv < 65536)
6578 {
6579 *p++ = DW_CFA_advance_loc2;
6580 bfd_put_16 (htab->elf.dynobj, adv, p);
6581 p += 2;
6582 }
6583 else
6584 {
6585 *p++ = DW_CFA_advance_loc4;
6586 bfd_put_32 (htab->elf.dynobj, adv, p);
6587 p += 4;
6588 }
6589 *p++ = DW_CFA_register;
6590 *p++ = 65;
6591 p++;
6592 *p++ = DW_CFA_advance_loc + 4;
6593 *p++ = DW_CFA_restore_extended;
6594 *p++ = 65;
6595 }
6596 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6597 == htab->glink_eh_frame->size);
6598 }
6599
6600 return TRUE;
6601 }
6602
6603 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6604 if it looks like nothing is using them. */
6605
6606 static void
maybe_strip_sdasym(bfd * output_bfd,elf_linker_section_t * lsect)6607 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6608 {
6609 struct elf_link_hash_entry *sda = lsect->sym;
6610
6611 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6612 {
6613 asection *s;
6614
6615 s = bfd_get_section_by_name (output_bfd, lsect->name);
6616 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6617 {
6618 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6619 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6620 {
6621 sda->def_regular = 0;
6622 /* This is somewhat magic. See elf_link_output_extsym. */
6623 sda->ref_dynamic = 1;
6624 sda->forced_local = 0;
6625 }
6626 }
6627 }
6628 }
6629
6630 void
ppc_elf_maybe_strip_sdata_syms(struct bfd_link_info * info)6631 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6632 {
6633 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6634
6635 if (htab != NULL)
6636 {
6637 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6638 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6639 }
6640 }
6641
6642
6643 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6644
6645 static bfd_boolean
ppc_elf_hash_symbol(struct elf_link_hash_entry * h)6646 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6647 {
6648 if (h->plt.plist != NULL
6649 && !h->def_regular
6650 && (!h->pointer_equality_needed
6651 || !h->ref_regular_nonweak))
6652 return FALSE;
6653
6654 return _bfd_elf_hash_symbol (h);
6655 }
6656
6657 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6658
6659 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6660 used for some functions that are allowed to break the ABI). */
6661 static const int shared_stub_entry[] =
6662 {
6663 0x7c0802a6, /* mflr 0 */
6664 0x429f0005, /* bcl 20, 31, .Lxxx */
6665 0x7d8802a6, /* mflr 12 */
6666 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6667 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6668 0x7c0803a6, /* mtlr 0 */
6669 0x7d8903a6, /* mtctr 12 */
6670 0x4e800420, /* bctr */
6671 };
6672
6673 static const int stub_entry[] =
6674 {
6675 0x3d800000, /* lis 12,xxx@ha */
6676 0x398c0000, /* addi 12,12,xxx@l */
6677 0x7d8903a6, /* mtctr 12 */
6678 0x4e800420, /* bctr */
6679 };
6680
6681 struct ppc_elf_relax_info
6682 {
6683 unsigned int workaround_size;
6684 };
6685
6686 /* This function implements long branch trampolines, and the ppc476
6687 icache bug workaround. Any section needing trampolines or patch
6688 space for the workaround has its size extended so that we can
6689 add trampolines at the end of the section. */
6690
6691 static bfd_boolean
ppc_elf_relax_section(bfd * abfd,asection * isec,struct bfd_link_info * link_info,bfd_boolean * again)6692 ppc_elf_relax_section (bfd *abfd,
6693 asection *isec,
6694 struct bfd_link_info *link_info,
6695 bfd_boolean *again)
6696 {
6697 struct one_fixup
6698 {
6699 struct one_fixup *next;
6700 asection *tsec;
6701 /* Final link, can use the symbol offset. For a
6702 relocatable link we use the symbol's index. */
6703 bfd_vma toff;
6704 bfd_vma trampoff;
6705 };
6706
6707 Elf_Internal_Shdr *symtab_hdr;
6708 bfd_byte *contents = NULL;
6709 Elf_Internal_Sym *isymbuf = NULL;
6710 Elf_Internal_Rela *internal_relocs = NULL;
6711 Elf_Internal_Rela *irel, *irelend = NULL;
6712 struct one_fixup *fixups = NULL;
6713 struct ppc_elf_relax_info *relax_info = NULL;
6714 unsigned changes = 0;
6715 bfd_boolean workaround_change;
6716 struct ppc_elf_link_hash_table *htab;
6717 bfd_size_type trampbase, trampoff, newsize;
6718 asection *got2;
6719 bfd_boolean maybe_pasted;
6720
6721 *again = FALSE;
6722
6723 /* No need to do anything with non-alloc or non-code sections. */
6724 if ((isec->flags & SEC_ALLOC) == 0
6725 || (isec->flags & SEC_CODE) == 0
6726 || (isec->flags & SEC_LINKER_CREATED) != 0
6727 || isec->size < 4)
6728 return TRUE;
6729
6730 /* We cannot represent the required PIC relocs in the output, so don't
6731 do anything. The linker doesn't support mixing -shared and -r
6732 anyway. */
6733 if (link_info->relocatable && link_info->shared)
6734 return TRUE;
6735
6736 htab = ppc_elf_hash_table (link_info);
6737 if (htab == NULL)
6738 return TRUE;
6739
6740 isec->size = (isec->size + 3) & -4;
6741 if (isec->rawsize == 0)
6742 isec->rawsize = isec->size;
6743 trampbase = isec->size;
6744
6745 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6746 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6747 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6748
6749 if (htab->params->ppc476_workaround)
6750 {
6751 if (elf_section_data (isec)->sec_info == NULL)
6752 {
6753 elf_section_data (isec)->sec_info
6754 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6755 if (elf_section_data (isec)->sec_info == NULL)
6756 return FALSE;
6757 }
6758 relax_info = elf_section_data (isec)->sec_info;
6759 trampbase -= relax_info->workaround_size;
6760 }
6761
6762 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6763 || strcmp (isec->output_section->name, ".fini") == 0);
6764 /* Space for a branch around any trampolines. */
6765 trampoff = trampbase;
6766 if (maybe_pasted && trampbase == isec->rawsize)
6767 trampoff += 4;
6768
6769 symtab_hdr = &elf_symtab_hdr (abfd);
6770
6771 if (htab->params->branch_trampolines)
6772 {
6773 /* Get a copy of the native relocations. */
6774 if (isec->reloc_count != 0)
6775 {
6776 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6777 link_info->keep_memory);
6778 if (internal_relocs == NULL)
6779 goto error_return;
6780 }
6781
6782 got2 = bfd_get_section_by_name (abfd, ".got2");
6783
6784 irelend = internal_relocs + isec->reloc_count;
6785 for (irel = internal_relocs; irel < irelend; irel++)
6786 {
6787 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6788 bfd_vma toff, roff;
6789 asection *tsec;
6790 struct one_fixup *f;
6791 size_t insn_offset = 0;
6792 bfd_vma max_branch_offset, val;
6793 bfd_byte *hit_addr;
6794 unsigned long t0;
6795 struct elf_link_hash_entry *h;
6796 struct plt_entry **plist;
6797 unsigned char sym_type;
6798
6799 switch (r_type)
6800 {
6801 case R_PPC_REL24:
6802 case R_PPC_LOCAL24PC:
6803 case R_PPC_PLTREL24:
6804 max_branch_offset = 1 << 25;
6805 break;
6806
6807 case R_PPC_REL14:
6808 case R_PPC_REL14_BRTAKEN:
6809 case R_PPC_REL14_BRNTAKEN:
6810 max_branch_offset = 1 << 15;
6811 break;
6812
6813 default:
6814 continue;
6815 }
6816
6817 /* Get the value of the symbol referred to by the reloc. */
6818 h = NULL;
6819 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6820 {
6821 /* A local symbol. */
6822 Elf_Internal_Sym *isym;
6823
6824 /* Read this BFD's local symbols. */
6825 if (isymbuf == NULL)
6826 {
6827 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6828 if (isymbuf == NULL)
6829 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6830 symtab_hdr->sh_info, 0,
6831 NULL, NULL, NULL);
6832 if (isymbuf == 0)
6833 goto error_return;
6834 }
6835 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6836 if (isym->st_shndx == SHN_UNDEF)
6837 tsec = bfd_und_section_ptr;
6838 else if (isym->st_shndx == SHN_ABS)
6839 tsec = bfd_abs_section_ptr;
6840 else if (isym->st_shndx == SHN_COMMON)
6841 tsec = bfd_com_section_ptr;
6842 else
6843 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6844
6845 toff = isym->st_value;
6846 sym_type = ELF_ST_TYPE (isym->st_info);
6847 }
6848 else
6849 {
6850 /* Global symbol handling. */
6851 unsigned long indx;
6852
6853 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6854 h = elf_sym_hashes (abfd)[indx];
6855
6856 while (h->root.type == bfd_link_hash_indirect
6857 || h->root.type == bfd_link_hash_warning)
6858 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6859
6860 if (h->root.type == bfd_link_hash_defined
6861 || h->root.type == bfd_link_hash_defweak)
6862 {
6863 tsec = h->root.u.def.section;
6864 toff = h->root.u.def.value;
6865 }
6866 else if (h->root.type == bfd_link_hash_undefined
6867 || h->root.type == bfd_link_hash_undefweak)
6868 {
6869 tsec = bfd_und_section_ptr;
6870 toff = link_info->relocatable ? indx : 0;
6871 }
6872 else
6873 continue;
6874
6875 /* If this branch is to __tls_get_addr then we may later
6876 optimise away the call. We won't be needing a long-
6877 branch stub in that case. */
6878 if (link_info->executable
6879 && !link_info->relocatable
6880 && h == htab->tls_get_addr
6881 && irel != internal_relocs)
6882 {
6883 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6884 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6885 unsigned int tls_mask = 0;
6886
6887 /* The previous reloc should be one of R_PPC_TLSGD or
6888 R_PPC_TLSLD, or for older object files, a reloc
6889 on the __tls_get_addr arg setup insn. Get tls
6890 mask bits from the symbol on that reloc. */
6891 if (t_symndx < symtab_hdr->sh_info)
6892 {
6893 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6894
6895 if (local_got_offsets != NULL)
6896 {
6897 struct plt_entry **local_plt = (struct plt_entry **)
6898 (local_got_offsets + symtab_hdr->sh_info);
6899 char *lgot_masks = (char *)
6900 (local_plt + symtab_hdr->sh_info);
6901 tls_mask = lgot_masks[t_symndx];
6902 }
6903 }
6904 else
6905 {
6906 struct elf_link_hash_entry *th
6907 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6908
6909 while (th->root.type == bfd_link_hash_indirect
6910 || th->root.type == bfd_link_hash_warning)
6911 th = (struct elf_link_hash_entry *) th->root.u.i.link;
6912
6913 tls_mask
6914 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
6915 }
6916
6917 /* The mask bits tell us if the call will be
6918 optimised away. */
6919 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
6920 && (t_rtype == R_PPC_TLSGD
6921 || t_rtype == R_PPC_GOT_TLSGD16
6922 || t_rtype == R_PPC_GOT_TLSGD16_LO))
6923 continue;
6924 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
6925 && (t_rtype == R_PPC_TLSLD
6926 || t_rtype == R_PPC_GOT_TLSLD16
6927 || t_rtype == R_PPC_GOT_TLSLD16_LO))
6928 continue;
6929 }
6930
6931 sym_type = h->type;
6932 }
6933
6934 /* The condition here under which we call find_plt_ent must
6935 match that in relocate_section. If we call find_plt_ent here
6936 but not in relocate_section, or vice versa, then the branch
6937 destination used here may be incorrect. */
6938 plist = NULL;
6939 if (h != NULL)
6940 {
6941 /* We know is_branch_reloc (r_type) is true. */
6942 if (h->type == STT_GNU_IFUNC
6943 || r_type == R_PPC_PLTREL24)
6944 plist = &h->plt.plist;
6945 }
6946 else if (sym_type == STT_GNU_IFUNC
6947 && elf_local_got_offsets (abfd) != NULL)
6948 {
6949 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6950 struct plt_entry **local_plt = (struct plt_entry **)
6951 (local_got_offsets + symtab_hdr->sh_info);
6952 plist = local_plt + ELF32_R_SYM (irel->r_info);
6953 }
6954 if (plist != NULL)
6955 {
6956 bfd_vma addend = 0;
6957 struct plt_entry *ent;
6958
6959 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6960 addend = irel->r_addend;
6961 ent = find_plt_ent (plist, got2, addend);
6962 if (ent != NULL)
6963 {
6964 if (htab->plt_type == PLT_NEW
6965 || h == NULL
6966 || !htab->elf.dynamic_sections_created
6967 || h->dynindx == -1)
6968 {
6969 tsec = htab->glink;
6970 toff = ent->glink_offset;
6971 }
6972 else
6973 {
6974 tsec = htab->plt;
6975 toff = ent->plt.offset;
6976 }
6977 }
6978 }
6979
6980 /* If the branch and target are in the same section, you have
6981 no hope of adding stubs. We'll error out later should the
6982 branch overflow. */
6983 if (tsec == isec)
6984 continue;
6985
6986 /* There probably isn't any reason to handle symbols in
6987 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6988 attribute for a code section, and we are only looking at
6989 branches. However, implement it correctly here as a
6990 reference for other target relax_section functions. */
6991 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
6992 {
6993 /* At this stage in linking, no SEC_MERGE symbol has been
6994 adjusted, so all references to such symbols need to be
6995 passed through _bfd_merged_section_offset. (Later, in
6996 relocate_section, all SEC_MERGE symbols *except* for
6997 section symbols have been adjusted.)
6998
6999 gas may reduce relocations against symbols in SEC_MERGE
7000 sections to a relocation against the section symbol when
7001 the original addend was zero. When the reloc is against
7002 a section symbol we should include the addend in the
7003 offset passed to _bfd_merged_section_offset, since the
7004 location of interest is the original symbol. On the
7005 other hand, an access to "sym+addend" where "sym" is not
7006 a section symbol should not include the addend; Such an
7007 access is presumed to be an offset from "sym"; The
7008 location of interest is just "sym". */
7009 if (sym_type == STT_SECTION)
7010 toff += irel->r_addend;
7011
7012 toff
7013 = _bfd_merged_section_offset (abfd, &tsec,
7014 elf_section_data (tsec)->sec_info,
7015 toff);
7016
7017 if (sym_type != STT_SECTION)
7018 toff += irel->r_addend;
7019 }
7020 /* PLTREL24 addends are special. */
7021 else if (r_type != R_PPC_PLTREL24)
7022 toff += irel->r_addend;
7023
7024 /* Attempted -shared link of non-pic code loses. */
7025 if ((!link_info->relocatable
7026 && tsec == bfd_und_section_ptr)
7027 || tsec->output_section == NULL
7028 || (tsec->owner != NULL
7029 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7030 continue;
7031
7032 roff = irel->r_offset;
7033
7034 /* If the branch is in range, no need to do anything. */
7035 if (tsec != bfd_und_section_ptr
7036 && (!link_info->relocatable
7037 /* A relocatable link may have sections moved during
7038 final link, so do not presume they remain in range. */
7039 || tsec->output_section == isec->output_section))
7040 {
7041 bfd_vma symaddr, reladdr;
7042
7043 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7044 reladdr = isec->output_section->vma + isec->output_offset + roff;
7045 if (symaddr - reladdr + max_branch_offset
7046 < 2 * max_branch_offset)
7047 continue;
7048 }
7049
7050 /* Look for an existing fixup to this address. */
7051 for (f = fixups; f ; f = f->next)
7052 if (f->tsec == tsec && f->toff == toff)
7053 break;
7054
7055 if (f == NULL)
7056 {
7057 size_t size;
7058 unsigned long stub_rtype;
7059
7060 val = trampoff - roff;
7061 if (val >= max_branch_offset)
7062 /* Oh dear, we can't reach a trampoline. Don't try to add
7063 one. We'll report an error later. */
7064 continue;
7065
7066 if (link_info->shared)
7067 {
7068 size = 4 * ARRAY_SIZE (shared_stub_entry);
7069 insn_offset = 12;
7070 }
7071 else
7072 {
7073 size = 4 * ARRAY_SIZE (stub_entry);
7074 insn_offset = 0;
7075 }
7076 stub_rtype = R_PPC_RELAX;
7077 if (tsec == htab->plt
7078 || tsec == htab->glink)
7079 {
7080 stub_rtype = R_PPC_RELAX_PLT;
7081 if (r_type == R_PPC_PLTREL24)
7082 stub_rtype = R_PPC_RELAX_PLTREL24;
7083 }
7084
7085 /* Hijack the old relocation. Since we need two
7086 relocations for this use a "composite" reloc. */
7087 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7088 stub_rtype);
7089 irel->r_offset = trampoff + insn_offset;
7090 if (r_type == R_PPC_PLTREL24
7091 && stub_rtype != R_PPC_RELAX_PLTREL24)
7092 irel->r_addend = 0;
7093
7094 /* Record the fixup so we don't do it again this section. */
7095 f = bfd_malloc (sizeof (*f));
7096 f->next = fixups;
7097 f->tsec = tsec;
7098 f->toff = toff;
7099 f->trampoff = trampoff;
7100 fixups = f;
7101
7102 trampoff += size;
7103 changes++;
7104 }
7105 else
7106 {
7107 val = f->trampoff - roff;
7108 if (val >= max_branch_offset)
7109 continue;
7110
7111 /* Nop out the reloc, since we're finalizing things here. */
7112 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7113 }
7114
7115 /* Get the section contents. */
7116 if (contents == NULL)
7117 {
7118 /* Get cached copy if it exists. */
7119 if (elf_section_data (isec)->this_hdr.contents != NULL)
7120 contents = elf_section_data (isec)->this_hdr.contents;
7121 /* Go get them off disk. */
7122 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7123 goto error_return;
7124 }
7125
7126 /* Fix up the existing branch to hit the trampoline. */
7127 hit_addr = contents + roff;
7128 switch (r_type)
7129 {
7130 case R_PPC_REL24:
7131 case R_PPC_LOCAL24PC:
7132 case R_PPC_PLTREL24:
7133 t0 = bfd_get_32 (abfd, hit_addr);
7134 t0 &= ~0x3fffffc;
7135 t0 |= val & 0x3fffffc;
7136 bfd_put_32 (abfd, t0, hit_addr);
7137 break;
7138
7139 case R_PPC_REL14:
7140 case R_PPC_REL14_BRTAKEN:
7141 case R_PPC_REL14_BRNTAKEN:
7142 t0 = bfd_get_32 (abfd, hit_addr);
7143 t0 &= ~0xfffc;
7144 t0 |= val & 0xfffc;
7145 bfd_put_32 (abfd, t0, hit_addr);
7146 break;
7147 }
7148 }
7149
7150 while (fixups != NULL)
7151 {
7152 struct one_fixup *f = fixups;
7153 fixups = fixups->next;
7154 free (f);
7155 }
7156 }
7157
7158 workaround_change = FALSE;
7159 newsize = trampoff;
7160 if (htab->params->ppc476_workaround
7161 && (!link_info->relocatable
7162 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7163 {
7164 bfd_vma addr, end_addr;
7165 unsigned int crossings;
7166 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7167
7168 addr = isec->output_section->vma + isec->output_offset;
7169 end_addr = addr + trampoff;
7170 addr &= -pagesize;
7171 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7172 if (crossings != 0)
7173 {
7174 /* Keep space aligned, to ensure the patch code itself does
7175 not cross a page. Don't decrease size calculated on a
7176 previous pass as otherwise we might never settle on a layout. */
7177 newsize = 15 - (end_addr & 15);
7178 newsize += crossings * 16;
7179 if (relax_info->workaround_size < newsize)
7180 {
7181 relax_info->workaround_size = newsize;
7182 workaround_change = TRUE;
7183 }
7184 /* Ensure relocate_section is called. */
7185 isec->flags |= SEC_RELOC;
7186 }
7187 newsize = trampoff + relax_info->workaround_size;
7188 }
7189
7190 if (changes || workaround_change)
7191 isec->size = newsize;
7192
7193 if (isymbuf != NULL
7194 && symtab_hdr->contents != (unsigned char *) isymbuf)
7195 {
7196 if (! link_info->keep_memory)
7197 free (isymbuf);
7198 else
7199 {
7200 /* Cache the symbols for elf_link_input_bfd. */
7201 symtab_hdr->contents = (unsigned char *) isymbuf;
7202 }
7203 }
7204
7205 if (contents != NULL
7206 && elf_section_data (isec)->this_hdr.contents != contents)
7207 {
7208 if (!changes && !link_info->keep_memory)
7209 free (contents);
7210 else
7211 {
7212 /* Cache the section contents for elf_link_input_bfd. */
7213 elf_section_data (isec)->this_hdr.contents = contents;
7214 }
7215 }
7216
7217 if (changes != 0)
7218 {
7219 /* Append sufficient NOP relocs so we can write out relocation
7220 information for the trampolines. */
7221 Elf_Internal_Shdr *rel_hdr;
7222 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7223 * sizeof (*new_relocs));
7224 unsigned ix;
7225
7226 if (!new_relocs)
7227 goto error_return;
7228 memcpy (new_relocs, internal_relocs,
7229 isec->reloc_count * sizeof (*new_relocs));
7230 for (ix = changes; ix--;)
7231 {
7232 irel = new_relocs + ix + isec->reloc_count;
7233
7234 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7235 }
7236 if (internal_relocs != elf_section_data (isec)->relocs)
7237 free (internal_relocs);
7238 elf_section_data (isec)->relocs = new_relocs;
7239 isec->reloc_count += changes;
7240 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7241 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7242 }
7243 else if (internal_relocs != NULL
7244 && elf_section_data (isec)->relocs != internal_relocs)
7245 free (internal_relocs);
7246
7247 *again = changes != 0 || workaround_change;
7248 return TRUE;
7249
7250 error_return:
7251 while (fixups != NULL)
7252 {
7253 struct one_fixup *f = fixups;
7254 fixups = fixups->next;
7255 free (f);
7256 }
7257 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7258 free (isymbuf);
7259 if (contents != NULL
7260 && elf_section_data (isec)->this_hdr.contents != contents)
7261 free (contents);
7262 if (internal_relocs != NULL
7263 && elf_section_data (isec)->relocs != internal_relocs)
7264 free (internal_relocs);
7265 return FALSE;
7266 }
7267
7268 /* What to do when ld finds relocations against symbols defined in
7269 discarded sections. */
7270
7271 static unsigned int
ppc_elf_action_discarded(asection * sec)7272 ppc_elf_action_discarded (asection *sec)
7273 {
7274 if (strcmp (".fixup", sec->name) == 0)
7275 return 0;
7276
7277 if (strcmp (".got2", sec->name) == 0)
7278 return 0;
7279
7280 return _bfd_elf_default_action_discarded (sec);
7281 }
7282
7283 /* Fill in the address for a pointer generated in a linker section. */
7284
7285 static bfd_vma
elf_finish_pointer_linker_section(bfd * input_bfd,elf_linker_section_t * lsect,struct elf_link_hash_entry * h,bfd_vma relocation,const Elf_Internal_Rela * rel)7286 elf_finish_pointer_linker_section (bfd *input_bfd,
7287 elf_linker_section_t *lsect,
7288 struct elf_link_hash_entry *h,
7289 bfd_vma relocation,
7290 const Elf_Internal_Rela *rel)
7291 {
7292 elf_linker_section_pointers_t *linker_section_ptr;
7293
7294 BFD_ASSERT (lsect != NULL);
7295
7296 if (h != NULL)
7297 {
7298 /* Handle global symbol. */
7299 struct ppc_elf_link_hash_entry *eh;
7300
7301 eh = (struct ppc_elf_link_hash_entry *) h;
7302 BFD_ASSERT (eh->elf.def_regular);
7303 linker_section_ptr = eh->linker_section_pointer;
7304 }
7305 else
7306 {
7307 /* Handle local symbol. */
7308 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7309
7310 BFD_ASSERT (is_ppc_elf (input_bfd));
7311 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7312 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7313 }
7314
7315 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7316 rel->r_addend,
7317 lsect);
7318 BFD_ASSERT (linker_section_ptr != NULL);
7319
7320 /* Offset will always be a multiple of four, so use the bottom bit
7321 as a "written" flag. */
7322 if ((linker_section_ptr->offset & 1) == 0)
7323 {
7324 bfd_put_32 (lsect->section->owner,
7325 relocation + linker_section_ptr->addend,
7326 lsect->section->contents + linker_section_ptr->offset);
7327 linker_section_ptr->offset += 1;
7328 }
7329
7330 relocation = (lsect->section->output_section->vma
7331 + lsect->section->output_offset
7332 + linker_section_ptr->offset - 1
7333 - SYM_VAL (lsect->sym));
7334
7335 #ifdef DEBUG
7336 fprintf (stderr,
7337 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7338 lsect->name, (long) relocation, (long) relocation);
7339 #endif
7340
7341 return relocation;
7342 }
7343
7344 #define PPC_LO(v) ((v) & 0xffff)
7345 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7346 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7347
7348 static void
write_glink_stub(struct plt_entry * ent,asection * plt_sec,unsigned char * p,struct bfd_link_info * info)7349 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7350 struct bfd_link_info *info)
7351 {
7352 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7353 bfd *output_bfd = info->output_bfd;
7354 bfd_vma plt;
7355
7356 plt = ((ent->plt.offset & ~1)
7357 + plt_sec->output_section->vma
7358 + plt_sec->output_offset);
7359
7360 if (info->shared)
7361 {
7362 bfd_vma got = 0;
7363
7364 if (ent->addend >= 32768)
7365 got = (ent->addend
7366 + ent->sec->output_section->vma
7367 + ent->sec->output_offset);
7368 else if (htab->elf.hgot != NULL)
7369 got = SYM_VAL (htab->elf.hgot);
7370
7371 plt -= got;
7372
7373 if (plt + 0x8000 < 0x10000)
7374 {
7375 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7376 p += 4;
7377 bfd_put_32 (output_bfd, MTCTR_11, p);
7378 p += 4;
7379 bfd_put_32 (output_bfd, BCTR, p);
7380 p += 4;
7381 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7382 p += 4;
7383 }
7384 else
7385 {
7386 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7387 p += 4;
7388 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7389 p += 4;
7390 bfd_put_32 (output_bfd, MTCTR_11, p);
7391 p += 4;
7392 bfd_put_32 (output_bfd, BCTR, p);
7393 p += 4;
7394 }
7395 }
7396 else
7397 {
7398 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7399 p += 4;
7400 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7401 p += 4;
7402 bfd_put_32 (output_bfd, MTCTR_11, p);
7403 p += 4;
7404 bfd_put_32 (output_bfd, BCTR, p);
7405 p += 4;
7406 }
7407 }
7408
7409 /* Return true if symbol is defined statically. */
7410
7411 static bfd_boolean
is_static_defined(struct elf_link_hash_entry * h)7412 is_static_defined (struct elf_link_hash_entry *h)
7413 {
7414 return ((h->root.type == bfd_link_hash_defined
7415 || h->root.type == bfd_link_hash_defweak)
7416 && h->root.u.def.section != NULL
7417 && h->root.u.def.section->output_section != NULL);
7418 }
7419
7420 /* If INSN is an opcode that may be used with an @tls operand, return
7421 the transformed insn for TLS optimisation, otherwise return 0. If
7422 REG is non-zero only match an insn with RB or RA equal to REG. */
7423
7424 unsigned int
_bfd_elf_ppc_at_tls_transform(unsigned int insn,unsigned int reg)7425 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7426 {
7427 unsigned int rtra;
7428
7429 if ((insn & (0x3f << 26)) != 31 << 26)
7430 return 0;
7431
7432 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7433 rtra = insn & ((1 << 26) - (1 << 16));
7434 else if (((insn >> 16) & 0x1f) == reg)
7435 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7436 else
7437 return 0;
7438
7439 if ((insn & (0x3ff << 1)) == 266 << 1)
7440 /* add -> addi. */
7441 insn = 14 << 26;
7442 else if ((insn & (0x1f << 1)) == 23 << 1
7443 && ((insn & (0x1f << 6)) < 14 << 6
7444 || ((insn & (0x1f << 6)) >= 16 << 6
7445 && (insn & (0x1f << 6)) < 24 << 6)))
7446 /* load and store indexed -> dform. */
7447 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7448 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7449 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7450 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7451 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7452 /* lwax -> lwa. */
7453 insn = (58 << 26) | 2;
7454 else
7455 return 0;
7456 insn |= rtra;
7457 return insn;
7458 }
7459
7460 /* If INSN is an opcode that may be used with an @tprel operand, return
7461 the transformed insn for an undefined weak symbol, ie. with the
7462 thread pointer REG operand removed. Otherwise return 0. */
7463
7464 unsigned int
_bfd_elf_ppc_at_tprel_transform(unsigned int insn,unsigned int reg)7465 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7466 {
7467 if ((insn & (0x1f << 16)) == reg << 16
7468 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7469 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7470 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7471 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7472 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7473 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7474 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7475 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7476 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7477 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7478 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7479 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7480 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7481 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7482 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7483 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7484 && (insn & 3) != 1)
7485 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7486 && ((insn & 3) == 0 || (insn & 3) == 3))))
7487 {
7488 insn &= ~(0x1f << 16);
7489 }
7490 else if ((insn & (0x1f << 21)) == reg << 21
7491 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7492 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7493 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7494 {
7495 insn &= ~(0x1f << 21);
7496 insn |= (insn & (0x1f << 16)) << 5;
7497 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7498 insn -= 2 >> 26; /* convert to ori,oris */
7499 }
7500 else
7501 insn = 0;
7502 return insn;
7503 }
7504
7505 static bfd_boolean
is_insn_ds_form(unsigned int insn)7506 is_insn_ds_form (unsigned int insn)
7507 {
7508 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7509 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7510 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7511 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7512 }
7513
7514 static bfd_boolean
is_insn_dq_form(unsigned int insn)7515 is_insn_dq_form (unsigned int insn)
7516 {
7517 return (insn & (0x3f << 26)) == 56u << 26; /* lq */
7518 }
7519
7520 /* The RELOCATE_SECTION function is called by the ELF backend linker
7521 to handle the relocations for a section.
7522
7523 The relocs are always passed as Rela structures; if the section
7524 actually uses Rel structures, the r_addend field will always be
7525 zero.
7526
7527 This function is responsible for adjust the section contents as
7528 necessary, and (if using Rela relocs and generating a
7529 relocatable output file) adjusting the reloc addend as
7530 necessary.
7531
7532 This function does not have to worry about setting the reloc
7533 address or the reloc symbol index.
7534
7535 LOCAL_SYMS is a pointer to the swapped in local symbols.
7536
7537 LOCAL_SECTIONS is an array giving the section in the input file
7538 corresponding to the st_shndx field of each local symbol.
7539
7540 The global hash table entry for the global symbols can be found
7541 via elf_sym_hashes (input_bfd).
7542
7543 When generating relocatable output, this function must handle
7544 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7545 going to be the section symbol corresponding to the output
7546 section, which means that the addend must be adjusted
7547 accordingly. */
7548
7549 static bfd_boolean
ppc_elf_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)7550 ppc_elf_relocate_section (bfd *output_bfd,
7551 struct bfd_link_info *info,
7552 bfd *input_bfd,
7553 asection *input_section,
7554 bfd_byte *contents,
7555 Elf_Internal_Rela *relocs,
7556 Elf_Internal_Sym *local_syms,
7557 asection **local_sections)
7558 {
7559 Elf_Internal_Shdr *symtab_hdr;
7560 struct elf_link_hash_entry **sym_hashes;
7561 struct ppc_elf_link_hash_table *htab;
7562 Elf_Internal_Rela *rel;
7563 Elf_Internal_Rela *relend;
7564 Elf_Internal_Rela outrel;
7565 asection *got2;
7566 bfd_vma *local_got_offsets;
7567 bfd_boolean ret = TRUE;
7568 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7569 bfd_boolean is_vxworks_tls;
7570
7571 #ifdef DEBUG
7572 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7573 "%ld relocations%s",
7574 input_bfd, input_section,
7575 (long) input_section->reloc_count,
7576 (info->relocatable) ? " (relocatable)" : "");
7577 #endif
7578
7579 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7580
7581 /* Initialize howto table if not already done. */
7582 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7583 ppc_elf_howto_init ();
7584
7585 htab = ppc_elf_hash_table (info);
7586 local_got_offsets = elf_local_got_offsets (input_bfd);
7587 symtab_hdr = &elf_symtab_hdr (input_bfd);
7588 sym_hashes = elf_sym_hashes (input_bfd);
7589 /* We have to handle relocations in vxworks .tls_vars sections
7590 specially, because the dynamic loader is 'weird'. */
7591 is_vxworks_tls = (htab->is_vxworks && info->shared
7592 && !strcmp (input_section->output_section->name,
7593 ".tls_vars"));
7594 rel = relocs;
7595 relend = relocs + input_section->reloc_count;
7596 for (; rel < relend; rel++)
7597 {
7598 enum elf_ppc_reloc_type r_type;
7599 bfd_vma addend;
7600 bfd_reloc_status_type r;
7601 Elf_Internal_Sym *sym;
7602 asection *sec;
7603 struct elf_link_hash_entry *h;
7604 const char *sym_name;
7605 reloc_howto_type *howto;
7606 unsigned long r_symndx;
7607 bfd_vma relocation;
7608 bfd_vma branch_bit, from;
7609 bfd_boolean unresolved_reloc;
7610 bfd_boolean warned;
7611 unsigned int tls_type, tls_mask, tls_gd;
7612 struct plt_entry **ifunc;
7613 struct reloc_howto_struct alt_howto;
7614
7615 r_type = ELF32_R_TYPE (rel->r_info);
7616 sym = NULL;
7617 sec = NULL;
7618 h = NULL;
7619 unresolved_reloc = FALSE;
7620 warned = FALSE;
7621 r_symndx = ELF32_R_SYM (rel->r_info);
7622
7623 if (r_symndx < symtab_hdr->sh_info)
7624 {
7625 sym = local_syms + r_symndx;
7626 sec = local_sections[r_symndx];
7627 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7628
7629 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7630 }
7631 else
7632 {
7633 bfd_boolean ignored;
7634
7635 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7636 r_symndx, symtab_hdr, sym_hashes,
7637 h, sec, relocation,
7638 unresolved_reloc, warned, ignored);
7639
7640 sym_name = h->root.root.string;
7641 }
7642
7643 if (sec != NULL && discarded_section (sec))
7644 {
7645 /* For relocs against symbols from removed linkonce sections,
7646 or sections discarded by a linker script, we just want the
7647 section contents zeroed. Avoid any special processing. */
7648 howto = NULL;
7649 if (r_type < R_PPC_max)
7650 howto = ppc_elf_howto_table[r_type];
7651 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
7652 rel, 1, relend, howto, 0, contents);
7653 }
7654
7655 if (info->relocatable)
7656 {
7657 if (got2 != NULL
7658 && r_type == R_PPC_PLTREL24
7659 && rel->r_addend != 0)
7660 {
7661 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7662 addend specifies the GOT pointer offset within .got2. */
7663 rel->r_addend += got2->output_offset;
7664 }
7665 if (r_type != R_PPC_RELAX_PLT
7666 && r_type != R_PPC_RELAX_PLTREL24
7667 && r_type != R_PPC_RELAX)
7668 continue;
7669 }
7670
7671 /* TLS optimizations. Replace instruction sequences and relocs
7672 based on information we collected in tls_optimize. We edit
7673 RELOCS so that --emit-relocs will output something sensible
7674 for the final instruction stream. */
7675 tls_mask = 0;
7676 tls_gd = 0;
7677 if (h != NULL)
7678 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7679 else if (local_got_offsets != NULL)
7680 {
7681 struct plt_entry **local_plt;
7682 char *lgot_masks;
7683 local_plt
7684 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7685 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7686 tls_mask = lgot_masks[r_symndx];
7687 }
7688
7689 /* Ensure reloc mapping code below stays sane. */
7690 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7691 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7692 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7693 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7694 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7695 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7696 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7697 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7698 abort ();
7699 switch (r_type)
7700 {
7701 default:
7702 break;
7703
7704 case R_PPC_GOT_TPREL16:
7705 case R_PPC_GOT_TPREL16_LO:
7706 if ((tls_mask & TLS_TLS) != 0
7707 && (tls_mask & TLS_TPREL) == 0)
7708 {
7709 bfd_vma insn;
7710
7711 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
7712 insn &= 31 << 21;
7713 insn |= 0x3c020000; /* addis 0,2,0 */
7714 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
7715 r_type = R_PPC_TPREL16_HA;
7716 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7717 }
7718 break;
7719
7720 case R_PPC_TLS:
7721 if ((tls_mask & TLS_TLS) != 0
7722 && (tls_mask & TLS_TPREL) == 0)
7723 {
7724 bfd_vma insn;
7725
7726 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7727 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7728 if (insn == 0)
7729 abort ();
7730 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7731 r_type = R_PPC_TPREL16_LO;
7732 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7733
7734 /* Was PPC_TLS which sits on insn boundary, now
7735 PPC_TPREL16_LO which is at low-order half-word. */
7736 rel->r_offset += d_offset;
7737 }
7738 break;
7739
7740 case R_PPC_GOT_TLSGD16_HI:
7741 case R_PPC_GOT_TLSGD16_HA:
7742 tls_gd = TLS_TPRELGD;
7743 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7744 goto tls_gdld_hi;
7745 break;
7746
7747 case R_PPC_GOT_TLSLD16_HI:
7748 case R_PPC_GOT_TLSLD16_HA:
7749 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7750 {
7751 tls_gdld_hi:
7752 if ((tls_mask & tls_gd) != 0)
7753 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7754 + R_PPC_GOT_TPREL16);
7755 else
7756 {
7757 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7758 rel->r_offset -= d_offset;
7759 r_type = R_PPC_NONE;
7760 }
7761 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7762 }
7763 break;
7764
7765 case R_PPC_GOT_TLSGD16:
7766 case R_PPC_GOT_TLSGD16_LO:
7767 tls_gd = TLS_TPRELGD;
7768 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7769 goto tls_ldgd_opt;
7770 break;
7771
7772 case R_PPC_GOT_TLSLD16:
7773 case R_PPC_GOT_TLSLD16_LO:
7774 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7775 {
7776 unsigned int insn1, insn2;
7777 bfd_vma offset;
7778
7779 tls_ldgd_opt:
7780 offset = (bfd_vma) -1;
7781 /* If not using the newer R_PPC_TLSGD/LD to mark
7782 __tls_get_addr calls, we must trust that the call
7783 stays with its arg setup insns, ie. that the next
7784 reloc is the __tls_get_addr call associated with
7785 the current reloc. Edit both insns. */
7786 if (input_section->has_tls_get_addr_call
7787 && rel + 1 < relend
7788 && branch_reloc_hash_match (input_bfd, rel + 1,
7789 htab->tls_get_addr))
7790 offset = rel[1].r_offset;
7791 if ((tls_mask & tls_gd) != 0)
7792 {
7793 /* IE */
7794 insn1 = bfd_get_32 (output_bfd,
7795 contents + rel->r_offset - d_offset);
7796 insn1 &= (1 << 26) - 1;
7797 insn1 |= 32 << 26; /* lwz */
7798 if (offset != (bfd_vma) -1)
7799 {
7800 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7801 insn2 = 0x7c631214; /* add 3,3,2 */
7802 bfd_put_32 (output_bfd, insn2, contents + offset);
7803 }
7804 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7805 + R_PPC_GOT_TPREL16);
7806 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7807 }
7808 else
7809 {
7810 /* LE */
7811 insn1 = 0x3c620000; /* addis 3,2,0 */
7812 if (tls_gd == 0)
7813 {
7814 /* Was an LD reloc. */
7815 for (r_symndx = 0;
7816 r_symndx < symtab_hdr->sh_info;
7817 r_symndx++)
7818 if (local_sections[r_symndx] == sec)
7819 break;
7820 if (r_symndx >= symtab_hdr->sh_info)
7821 r_symndx = STN_UNDEF;
7822 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7823 if (r_symndx != STN_UNDEF)
7824 rel->r_addend -= (local_syms[r_symndx].st_value
7825 + sec->output_offset
7826 + sec->output_section->vma);
7827 }
7828 r_type = R_PPC_TPREL16_HA;
7829 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7830 if (offset != (bfd_vma) -1)
7831 {
7832 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7833 rel[1].r_offset = offset + d_offset;
7834 rel[1].r_addend = rel->r_addend;
7835 insn2 = 0x38630000; /* addi 3,3,0 */
7836 bfd_put_32 (output_bfd, insn2, contents + offset);
7837 }
7838 }
7839 bfd_put_32 (output_bfd, insn1,
7840 contents + rel->r_offset - d_offset);
7841 if (tls_gd == 0)
7842 {
7843 /* We changed the symbol on an LD reloc. Start over
7844 in order to get h, sym, sec etc. right. */
7845 rel--;
7846 continue;
7847 }
7848 }
7849 break;
7850
7851 case R_PPC_TLSGD:
7852 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7853 {
7854 unsigned int insn2;
7855 bfd_vma offset = rel->r_offset;
7856
7857 if ((tls_mask & TLS_TPRELGD) != 0)
7858 {
7859 /* IE */
7860 r_type = R_PPC_NONE;
7861 insn2 = 0x7c631214; /* add 3,3,2 */
7862 }
7863 else
7864 {
7865 /* LE */
7866 r_type = R_PPC_TPREL16_LO;
7867 rel->r_offset += d_offset;
7868 insn2 = 0x38630000; /* addi 3,3,0 */
7869 }
7870 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7871 bfd_put_32 (output_bfd, insn2, contents + offset);
7872 /* Zap the reloc on the _tls_get_addr call too. */
7873 BFD_ASSERT (offset == rel[1].r_offset);
7874 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7875 }
7876 break;
7877
7878 case R_PPC_TLSLD:
7879 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7880 {
7881 unsigned int insn2;
7882
7883 for (r_symndx = 0;
7884 r_symndx < symtab_hdr->sh_info;
7885 r_symndx++)
7886 if (local_sections[r_symndx] == sec)
7887 break;
7888 if (r_symndx >= symtab_hdr->sh_info)
7889 r_symndx = STN_UNDEF;
7890 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7891 if (r_symndx != STN_UNDEF)
7892 rel->r_addend -= (local_syms[r_symndx].st_value
7893 + sec->output_offset
7894 + sec->output_section->vma);
7895
7896 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7897 rel->r_offset += d_offset;
7898 insn2 = 0x38630000; /* addi 3,3,0 */
7899 bfd_put_32 (output_bfd, insn2,
7900 contents + rel->r_offset - d_offset);
7901 /* Zap the reloc on the _tls_get_addr call too. */
7902 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7903 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7904 rel--;
7905 continue;
7906 }
7907 break;
7908 }
7909
7910 /* Handle other relocations that tweak non-addend part of insn. */
7911 branch_bit = 0;
7912 switch (r_type)
7913 {
7914 default:
7915 break;
7916
7917 /* Branch taken prediction relocations. */
7918 case R_PPC_ADDR14_BRTAKEN:
7919 case R_PPC_REL14_BRTAKEN:
7920 branch_bit = BRANCH_PREDICT_BIT;
7921 /* Fall thru */
7922
7923 /* Branch not taken prediction relocations. */
7924 case R_PPC_ADDR14_BRNTAKEN:
7925 case R_PPC_REL14_BRNTAKEN:
7926 {
7927 bfd_vma insn;
7928
7929 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7930 insn &= ~BRANCH_PREDICT_BIT;
7931 insn |= branch_bit;
7932
7933 from = (rel->r_offset
7934 + input_section->output_offset
7935 + input_section->output_section->vma);
7936
7937 /* Invert 'y' bit if not the default. */
7938 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7939 insn ^= BRANCH_PREDICT_BIT;
7940
7941 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7942 break;
7943 }
7944 }
7945
7946 ifunc = NULL;
7947 if (!htab->is_vxworks)
7948 {
7949 struct plt_entry *ent;
7950
7951 if (h != NULL)
7952 {
7953 if (h->type == STT_GNU_IFUNC)
7954 ifunc = &h->plt.plist;
7955 }
7956 else if (local_got_offsets != NULL
7957 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7958 {
7959 struct plt_entry **local_plt;
7960
7961 local_plt = (struct plt_entry **) (local_got_offsets
7962 + symtab_hdr->sh_info);
7963 ifunc = local_plt + r_symndx;
7964 }
7965
7966 ent = NULL;
7967 if (ifunc != NULL
7968 && (!info->shared
7969 || is_branch_reloc (r_type)))
7970 {
7971 addend = 0;
7972 if (r_type == R_PPC_PLTREL24 && info->shared)
7973 addend = rel->r_addend;
7974 ent = find_plt_ent (ifunc, got2, addend);
7975 }
7976 if (ent != NULL)
7977 {
7978 if (h == NULL && (ent->plt.offset & 1) == 0)
7979 {
7980 Elf_Internal_Rela rela;
7981 bfd_byte *loc;
7982
7983 rela.r_offset = (htab->iplt->output_section->vma
7984 + htab->iplt->output_offset
7985 + ent->plt.offset);
7986 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7987 rela.r_addend = relocation;
7988 loc = htab->reliplt->contents;
7989 loc += (htab->reliplt->reloc_count++
7990 * sizeof (Elf32_External_Rela));
7991 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7992
7993 ent->plt.offset |= 1;
7994 }
7995 if (h == NULL && (ent->glink_offset & 1) == 0)
7996 {
7997 unsigned char *p = ((unsigned char *) htab->glink->contents
7998 + ent->glink_offset);
7999 write_glink_stub (ent, htab->iplt, p, info);
8000 ent->glink_offset |= 1;
8001 }
8002
8003 unresolved_reloc = FALSE;
8004 if (htab->plt_type == PLT_NEW
8005 || !htab->elf.dynamic_sections_created
8006 || h == NULL
8007 || h->dynindx == -1)
8008 relocation = (htab->glink->output_section->vma
8009 + htab->glink->output_offset
8010 + (ent->glink_offset & ~1));
8011 else
8012 relocation = (htab->plt->output_section->vma
8013 + htab->plt->output_offset
8014 + ent->plt.offset);
8015 }
8016 }
8017
8018 addend = rel->r_addend;
8019 tls_type = 0;
8020 howto = NULL;
8021 if (r_type < R_PPC_max)
8022 howto = ppc_elf_howto_table[r_type];
8023 switch (r_type)
8024 {
8025 default:
8026 info->callbacks->einfo
8027 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8028 input_bfd, (int) r_type, sym_name);
8029
8030 bfd_set_error (bfd_error_bad_value);
8031 ret = FALSE;
8032 continue;
8033
8034 case R_PPC_NONE:
8035 case R_PPC_TLS:
8036 case R_PPC_TLSGD:
8037 case R_PPC_TLSLD:
8038 case R_PPC_EMB_MRKREF:
8039 case R_PPC_GNU_VTINHERIT:
8040 case R_PPC_GNU_VTENTRY:
8041 continue;
8042
8043 /* GOT16 relocations. Like an ADDR16 using the symbol's
8044 address in the GOT as relocation value instead of the
8045 symbol's value itself. Also, create a GOT entry for the
8046 symbol and put the symbol value there. */
8047 case R_PPC_GOT_TLSGD16:
8048 case R_PPC_GOT_TLSGD16_LO:
8049 case R_PPC_GOT_TLSGD16_HI:
8050 case R_PPC_GOT_TLSGD16_HA:
8051 tls_type = TLS_TLS | TLS_GD;
8052 goto dogot;
8053
8054 case R_PPC_GOT_TLSLD16:
8055 case R_PPC_GOT_TLSLD16_LO:
8056 case R_PPC_GOT_TLSLD16_HI:
8057 case R_PPC_GOT_TLSLD16_HA:
8058 tls_type = TLS_TLS | TLS_LD;
8059 goto dogot;
8060
8061 case R_PPC_GOT_TPREL16:
8062 case R_PPC_GOT_TPREL16_LO:
8063 case R_PPC_GOT_TPREL16_HI:
8064 case R_PPC_GOT_TPREL16_HA:
8065 tls_type = TLS_TLS | TLS_TPREL;
8066 goto dogot;
8067
8068 case R_PPC_GOT_DTPREL16:
8069 case R_PPC_GOT_DTPREL16_LO:
8070 case R_PPC_GOT_DTPREL16_HI:
8071 case R_PPC_GOT_DTPREL16_HA:
8072 tls_type = TLS_TLS | TLS_DTPREL;
8073 goto dogot;
8074
8075 case R_PPC_GOT16:
8076 case R_PPC_GOT16_LO:
8077 case R_PPC_GOT16_HI:
8078 case R_PPC_GOT16_HA:
8079 tls_mask = 0;
8080 dogot:
8081 {
8082 /* Relocation is to the entry for this symbol in the global
8083 offset table. */
8084 bfd_vma off;
8085 bfd_vma *offp;
8086 unsigned long indx;
8087
8088 if (htab->got == NULL)
8089 abort ();
8090
8091 indx = 0;
8092 if (tls_type == (TLS_TLS | TLS_LD)
8093 && (h == NULL
8094 || !h->def_dynamic))
8095 offp = &htab->tlsld_got.offset;
8096 else if (h != NULL)
8097 {
8098 bfd_boolean dyn;
8099 dyn = htab->elf.dynamic_sections_created;
8100 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8101 || (info->shared
8102 && SYMBOL_REFERENCES_LOCAL (info, h)))
8103 /* This is actually a static link, or it is a
8104 -Bsymbolic link and the symbol is defined
8105 locally, or the symbol was forced to be local
8106 because of a version file. */
8107 ;
8108 else
8109 {
8110 BFD_ASSERT (h->dynindx != -1);
8111 indx = h->dynindx;
8112 unresolved_reloc = FALSE;
8113 }
8114 offp = &h->got.offset;
8115 }
8116 else
8117 {
8118 if (local_got_offsets == NULL)
8119 abort ();
8120 offp = &local_got_offsets[r_symndx];
8121 }
8122
8123 /* The offset must always be a multiple of 4. We use the
8124 least significant bit to record whether we have already
8125 processed this entry. */
8126 off = *offp;
8127 if ((off & 1) != 0)
8128 off &= ~1;
8129 else
8130 {
8131 unsigned int tls_m = (tls_mask
8132 & (TLS_LD | TLS_GD | TLS_DTPREL
8133 | TLS_TPREL | TLS_TPRELGD));
8134
8135 if (offp == &htab->tlsld_got.offset)
8136 tls_m = TLS_LD;
8137 else if (h == NULL
8138 || !h->def_dynamic)
8139 tls_m &= ~TLS_LD;
8140
8141 /* We might have multiple got entries for this sym.
8142 Initialize them all. */
8143 do
8144 {
8145 int tls_ty = 0;
8146
8147 if ((tls_m & TLS_LD) != 0)
8148 {
8149 tls_ty = TLS_TLS | TLS_LD;
8150 tls_m &= ~TLS_LD;
8151 }
8152 else if ((tls_m & TLS_GD) != 0)
8153 {
8154 tls_ty = TLS_TLS | TLS_GD;
8155 tls_m &= ~TLS_GD;
8156 }
8157 else if ((tls_m & TLS_DTPREL) != 0)
8158 {
8159 tls_ty = TLS_TLS | TLS_DTPREL;
8160 tls_m &= ~TLS_DTPREL;
8161 }
8162 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8163 {
8164 tls_ty = TLS_TLS | TLS_TPREL;
8165 tls_m = 0;
8166 }
8167
8168 /* Generate relocs for the dynamic linker. */
8169 if ((info->shared || indx != 0)
8170 && (offp == &htab->tlsld_got.offset
8171 || h == NULL
8172 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8173 || h->root.type != bfd_link_hash_undefweak))
8174 {
8175 asection *rsec = htab->relgot;
8176 bfd_byte * loc;
8177
8178 if (ifunc != NULL)
8179 rsec = htab->reliplt;
8180 outrel.r_offset = (htab->got->output_section->vma
8181 + htab->got->output_offset
8182 + off);
8183 outrel.r_addend = 0;
8184 if (tls_ty & (TLS_LD | TLS_GD))
8185 {
8186 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8187 if (tls_ty == (TLS_TLS | TLS_GD))
8188 {
8189 loc = rsec->contents;
8190 loc += (rsec->reloc_count++
8191 * sizeof (Elf32_External_Rela));
8192 bfd_elf32_swap_reloca_out (output_bfd,
8193 &outrel, loc);
8194 outrel.r_offset += 4;
8195 outrel.r_info
8196 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8197 }
8198 }
8199 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8200 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8201 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8202 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8203 else if (indx != 0)
8204 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8205 else if (ifunc != NULL)
8206 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8207 else
8208 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8209 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8210 {
8211 outrel.r_addend += relocation;
8212 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8213 outrel.r_addend -= htab->elf.tls_sec->vma;
8214 }
8215 loc = rsec->contents;
8216 loc += (rsec->reloc_count++
8217 * sizeof (Elf32_External_Rela));
8218 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8219 }
8220
8221 /* Init the .got section contents if we're not
8222 emitting a reloc. */
8223 else
8224 {
8225 bfd_vma value = relocation;
8226
8227 if (tls_ty == (TLS_TLS | TLS_LD))
8228 value = 1;
8229 else if (tls_ty != 0)
8230 {
8231 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8232 if (tls_ty == (TLS_TLS | TLS_TPREL))
8233 value += DTP_OFFSET - TP_OFFSET;
8234
8235 if (tls_ty == (TLS_TLS | TLS_GD))
8236 {
8237 bfd_put_32 (output_bfd, value,
8238 htab->got->contents + off + 4);
8239 value = 1;
8240 }
8241 }
8242 bfd_put_32 (output_bfd, value,
8243 htab->got->contents + off);
8244 }
8245
8246 off += 4;
8247 if (tls_ty & (TLS_LD | TLS_GD))
8248 off += 4;
8249 }
8250 while (tls_m != 0);
8251
8252 off = *offp;
8253 *offp = off | 1;
8254 }
8255
8256 if (off >= (bfd_vma) -2)
8257 abort ();
8258
8259 if ((tls_type & TLS_TLS) != 0)
8260 {
8261 if (tls_type != (TLS_TLS | TLS_LD))
8262 {
8263 if ((tls_mask & TLS_LD) != 0
8264 && !(h == NULL
8265 || !h->def_dynamic))
8266 off += 8;
8267 if (tls_type != (TLS_TLS | TLS_GD))
8268 {
8269 if ((tls_mask & TLS_GD) != 0)
8270 off += 8;
8271 if (tls_type != (TLS_TLS | TLS_DTPREL))
8272 {
8273 if ((tls_mask & TLS_DTPREL) != 0)
8274 off += 4;
8275 }
8276 }
8277 }
8278 }
8279
8280 relocation = (htab->got->output_section->vma
8281 + htab->got->output_offset
8282 + off
8283 - SYM_VAL (htab->elf.hgot));
8284
8285 /* Addends on got relocations don't make much sense.
8286 x+off@got is actually x@got+off, and since the got is
8287 generated by a hash table traversal, the value in the
8288 got at entry m+n bears little relation to the entry m. */
8289 if (addend != 0)
8290 info->callbacks->einfo
8291 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8292 input_bfd, input_section, rel->r_offset,
8293 howto->name,
8294 sym_name);
8295 }
8296 break;
8297
8298 /* Relocations that need no special processing. */
8299 case R_PPC_LOCAL24PC:
8300 /* It makes no sense to point a local relocation
8301 at a symbol not in this object. */
8302 if (unresolved_reloc)
8303 {
8304 if (! (*info->callbacks->undefined_symbol) (info,
8305 h->root.root.string,
8306 input_bfd,
8307 input_section,
8308 rel->r_offset,
8309 TRUE))
8310 return FALSE;
8311 continue;
8312 }
8313 break;
8314
8315 case R_PPC_DTPREL16:
8316 case R_PPC_DTPREL16_LO:
8317 case R_PPC_DTPREL16_HI:
8318 case R_PPC_DTPREL16_HA:
8319 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8320 break;
8321
8322 /* Relocations that may need to be propagated if this is a shared
8323 object. */
8324 case R_PPC_TPREL16:
8325 case R_PPC_TPREL16_LO:
8326 case R_PPC_TPREL16_HI:
8327 case R_PPC_TPREL16_HA:
8328 if (h != NULL
8329 && h->root.type == bfd_link_hash_undefweak
8330 && h->dynindx == -1)
8331 {
8332 /* Make this relocation against an undefined weak symbol
8333 resolve to zero. This is really just a tweak, since
8334 code using weak externs ought to check that they are
8335 defined before using them. */
8336 bfd_byte *p = contents + rel->r_offset - d_offset;
8337 unsigned int insn = bfd_get_32 (output_bfd, p);
8338 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8339 if (insn != 0)
8340 bfd_put_32 (output_bfd, insn, p);
8341 break;
8342 }
8343 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8344 /* The TPREL16 relocs shouldn't really be used in shared
8345 libs as they will result in DT_TEXTREL being set, but
8346 support them anyway. */
8347 goto dodyn;
8348
8349 case R_PPC_TPREL32:
8350 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8351 goto dodyn;
8352
8353 case R_PPC_DTPREL32:
8354 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8355 goto dodyn;
8356
8357 case R_PPC_DTPMOD32:
8358 relocation = 1;
8359 addend = 0;
8360 goto dodyn;
8361
8362 case R_PPC_REL16:
8363 case R_PPC_REL16_LO:
8364 case R_PPC_REL16_HI:
8365 case R_PPC_REL16_HA:
8366 break;
8367
8368 case R_PPC_REL32:
8369 if (h == NULL || h == htab->elf.hgot)
8370 break;
8371 /* fall through */
8372
8373 case R_PPC_ADDR32:
8374 case R_PPC_ADDR16:
8375 case R_PPC_ADDR16_LO:
8376 case R_PPC_ADDR16_HI:
8377 case R_PPC_ADDR16_HA:
8378 case R_PPC_UADDR32:
8379 case R_PPC_UADDR16:
8380 goto dodyn;
8381
8382 case R_PPC_VLE_REL8:
8383 case R_PPC_VLE_REL15:
8384 case R_PPC_VLE_REL24:
8385 case R_PPC_REL24:
8386 case R_PPC_REL14:
8387 case R_PPC_REL14_BRTAKEN:
8388 case R_PPC_REL14_BRNTAKEN:
8389 /* If these relocations are not to a named symbol, they can be
8390 handled right here, no need to bother the dynamic linker. */
8391 if (SYMBOL_CALLS_LOCAL (info, h)
8392 || h == htab->elf.hgot)
8393 break;
8394 /* fall through */
8395
8396 case R_PPC_ADDR24:
8397 case R_PPC_ADDR14:
8398 case R_PPC_ADDR14_BRTAKEN:
8399 case R_PPC_ADDR14_BRNTAKEN:
8400 if (h != NULL && !info->shared)
8401 break;
8402 /* fall through */
8403
8404 dodyn:
8405 if ((input_section->flags & SEC_ALLOC) == 0
8406 || is_vxworks_tls)
8407 break;
8408
8409 if ((info->shared
8410 && !(h != NULL
8411 && ((h->root.type == bfd_link_hash_undefined
8412 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8413 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8414 || (h->root.type == bfd_link_hash_undefweak
8415 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8416 && (must_be_dyn_reloc (info, r_type)
8417 || !SYMBOL_CALLS_LOCAL (info, h)))
8418 || (ELIMINATE_COPY_RELOCS
8419 && !info->shared
8420 && h != NULL
8421 && h->dynindx != -1
8422 && !h->non_got_ref
8423 && !h->def_regular))
8424 {
8425 int skip;
8426 bfd_byte *loc;
8427 asection *sreloc;
8428 #ifdef DEBUG
8429 fprintf (stderr, "ppc_elf_relocate_section needs to "
8430 "create relocation for %s\n",
8431 (h && h->root.root.string
8432 ? h->root.root.string : "<unknown>"));
8433 #endif
8434
8435 /* When generating a shared object, these relocations
8436 are copied into the output file to be resolved at run
8437 time. */
8438 sreloc = elf_section_data (input_section)->sreloc;
8439 if (ifunc)
8440 sreloc = htab->reliplt;
8441 if (sreloc == NULL)
8442 return FALSE;
8443
8444 skip = 0;
8445 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8446 input_section,
8447 rel->r_offset);
8448 if (outrel.r_offset == (bfd_vma) -1
8449 || outrel.r_offset == (bfd_vma) -2)
8450 skip = (int) outrel.r_offset;
8451 outrel.r_offset += (input_section->output_section->vma
8452 + input_section->output_offset);
8453
8454 if (skip)
8455 memset (&outrel, 0, sizeof outrel);
8456 else if ((h != NULL
8457 && (h->root.type == bfd_link_hash_undefined
8458 || h->root.type == bfd_link_hash_undefweak))
8459 || !SYMBOL_REFERENCES_LOCAL (info, h))
8460 {
8461 BFD_ASSERT (h->dynindx != -1);
8462 unresolved_reloc = FALSE;
8463 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8464 outrel.r_addend = rel->r_addend;
8465 }
8466 else
8467 {
8468 outrel.r_addend = relocation + rel->r_addend;
8469
8470 if (r_type != R_PPC_ADDR32)
8471 {
8472 long indx = 0;
8473
8474 if (ifunc != NULL)
8475 {
8476 /* If we get here when building a static
8477 executable, then the libc startup function
8478 responsible for applying indirect function
8479 relocations is going to complain about
8480 the reloc type.
8481 If we get here when building a dynamic
8482 executable, it will be because we have
8483 a text relocation. The dynamic loader
8484 will set the text segment writable and
8485 non-executable to apply text relocations.
8486 So we'll segfault when trying to run the
8487 indirection function to resolve the reloc. */
8488 info->callbacks->einfo
8489 (_("%P: %H: relocation %s for indirect "
8490 "function %s unsupported\n"),
8491 input_bfd, input_section, rel->r_offset,
8492 howto->name,
8493 sym_name);
8494 ret = FALSE;
8495 }
8496 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8497 ;
8498 else if (sec == NULL || sec->owner == NULL)
8499 {
8500 bfd_set_error (bfd_error_bad_value);
8501 ret = FALSE;
8502 }
8503 else
8504 {
8505 asection *osec;
8506
8507 /* We are turning this relocation into one
8508 against a section symbol. It would be
8509 proper to subtract the symbol's value,
8510 osec->vma, from the emitted reloc addend,
8511 but ld.so expects buggy relocs.
8512 FIXME: Why not always use a zero index? */
8513 osec = sec->output_section;
8514 indx = elf_section_data (osec)->dynindx;
8515 if (indx == 0)
8516 {
8517 osec = htab->elf.text_index_section;
8518 indx = elf_section_data (osec)->dynindx;
8519 }
8520 BFD_ASSERT (indx != 0);
8521 #ifdef DEBUG
8522 if (indx == 0)
8523 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8524 indx, osec->name, osec->flags,
8525 h->root.root.string);
8526 #endif
8527 }
8528
8529 outrel.r_info = ELF32_R_INFO (indx, r_type);
8530 }
8531 else if (ifunc != NULL)
8532 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8533 else
8534 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8535 }
8536
8537 loc = sreloc->contents;
8538 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8539 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8540
8541 if (skip == -1)
8542 continue;
8543
8544 /* This reloc will be computed at runtime. We clear the memory
8545 so that it contains predictable value. */
8546 if (! skip
8547 && ((input_section->flags & SEC_ALLOC) != 0
8548 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8549 {
8550 relocation = howto->pc_relative ? outrel.r_offset : 0;
8551 addend = 0;
8552 break;
8553 }
8554 }
8555 break;
8556
8557 case R_PPC_RELAX_PLT:
8558 case R_PPC_RELAX_PLTREL24:
8559 if (h != NULL)
8560 {
8561 struct plt_entry *ent;
8562 bfd_vma got2_addend = 0;
8563
8564 if (r_type == R_PPC_RELAX_PLTREL24)
8565 {
8566 if (info->shared)
8567 got2_addend = addend;
8568 addend = 0;
8569 }
8570 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8571 if (htab->plt_type == PLT_NEW)
8572 relocation = (htab->glink->output_section->vma
8573 + htab->glink->output_offset
8574 + ent->glink_offset);
8575 else
8576 relocation = (htab->plt->output_section->vma
8577 + htab->plt->output_offset
8578 + ent->plt.offset);
8579 }
8580 /* Fall thru */
8581
8582 case R_PPC_RELAX:
8583 {
8584 const int *stub;
8585 size_t size;
8586 size_t insn_offset = rel->r_offset;
8587 unsigned int insn;
8588
8589 if (info->shared)
8590 {
8591 relocation -= (input_section->output_section->vma
8592 + input_section->output_offset
8593 + rel->r_offset - 4);
8594 stub = shared_stub_entry;
8595 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12);
8596 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8);
8597 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4);
8598 stub += 3;
8599 size = ARRAY_SIZE (shared_stub_entry) - 3;
8600 }
8601 else
8602 {
8603 stub = stub_entry;
8604 size = ARRAY_SIZE (stub_entry);
8605 }
8606
8607 relocation += addend;
8608 if (info->relocatable)
8609 relocation = 0;
8610
8611 /* First insn is HA, second is LO. */
8612 insn = *stub++;
8613 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8614 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8615 insn_offset += 4;
8616
8617 insn = *stub++;
8618 insn |= relocation & 0xffff;
8619 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8620 insn_offset += 4;
8621 size -= 2;
8622
8623 while (size != 0)
8624 {
8625 insn = *stub++;
8626 --size;
8627 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8628 insn_offset += 4;
8629 }
8630
8631 /* Rewrite the reloc and convert one of the trailing nop
8632 relocs to describe this relocation. */
8633 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8634 /* The relocs are at the bottom 2 bytes */
8635 rel[0].r_offset += d_offset;
8636 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8637 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8638 rel[1].r_offset += 4;
8639 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8640 rel++;
8641 }
8642 continue;
8643
8644 /* Indirect .sdata relocation. */
8645 case R_PPC_EMB_SDAI16:
8646 BFD_ASSERT (htab->sdata[0].section != NULL);
8647 if (!is_static_defined (htab->sdata[0].sym))
8648 {
8649 unresolved_reloc = TRUE;
8650 break;
8651 }
8652 relocation
8653 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8654 h, relocation, rel);
8655 addend = 0;
8656 break;
8657
8658 /* Indirect .sdata2 relocation. */
8659 case R_PPC_EMB_SDA2I16:
8660 BFD_ASSERT (htab->sdata[1].section != NULL);
8661 if (!is_static_defined (htab->sdata[1].sym))
8662 {
8663 unresolved_reloc = TRUE;
8664 break;
8665 }
8666 relocation
8667 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8668 h, relocation, rel);
8669 addend = 0;
8670 break;
8671
8672 /* Handle the TOC16 reloc. We want to use the offset within the .got
8673 section, not the actual VMA. This is appropriate when generating
8674 an embedded ELF object, for which the .got section acts like the
8675 AIX .toc section. */
8676 case R_PPC_TOC16: /* phony GOT16 relocations */
8677 if (sec == NULL || sec->output_section == NULL)
8678 {
8679 unresolved_reloc = TRUE;
8680 break;
8681 }
8682 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8683 ".got") == 0
8684 || strcmp (bfd_get_section_name (sec->owner, sec),
8685 ".cgot") == 0);
8686
8687 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8688 break;
8689
8690 case R_PPC_PLTREL24:
8691 if (h != NULL && ifunc == NULL)
8692 {
8693 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
8694 info->shared ? addend : 0);
8695 if (ent == NULL
8696 || htab->plt == NULL)
8697 {
8698 /* We didn't make a PLT entry for this symbol. This
8699 happens when statically linking PIC code, or when
8700 using -Bsymbolic. */
8701 }
8702 else
8703 {
8704 /* Relocation is to the entry for this symbol in the
8705 procedure linkage table. */
8706 unresolved_reloc = FALSE;
8707 if (htab->plt_type == PLT_NEW)
8708 relocation = (htab->glink->output_section->vma
8709 + htab->glink->output_offset
8710 + ent->glink_offset);
8711 else
8712 relocation = (htab->plt->output_section->vma
8713 + htab->plt->output_offset
8714 + ent->plt.offset);
8715 }
8716 }
8717
8718 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8719 addend specifies the GOT pointer offset within .got2.
8720 Don't apply it to the relocation field. */
8721 addend = 0;
8722 break;
8723
8724 /* Relocate against _SDA_BASE_. */
8725 case R_PPC_SDAREL16:
8726 {
8727 const char *name;
8728 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8729
8730 if (sec == NULL
8731 || sec->output_section == NULL
8732 || !is_static_defined (sda))
8733 {
8734 unresolved_reloc = TRUE;
8735 break;
8736 }
8737 addend -= SYM_VAL (sda);
8738
8739 name = bfd_get_section_name (output_bfd, sec->output_section);
8740 if (!(strcmp (name, ".sdata") == 0
8741 || strcmp (name, ".sbss") == 0))
8742 {
8743 info->callbacks->einfo
8744 (_("%P: %B: the target (%s) of a %s relocation is "
8745 "in the wrong output section (%s)\n"),
8746 input_bfd,
8747 sym_name,
8748 howto->name,
8749 name);
8750 }
8751 }
8752 break;
8753
8754 /* Relocate against _SDA2_BASE_. */
8755 case R_PPC_EMB_SDA2REL:
8756 {
8757 const char *name;
8758 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8759
8760 if (sec == NULL
8761 || sec->output_section == NULL
8762 || !is_static_defined (sda))
8763 {
8764 unresolved_reloc = TRUE;
8765 break;
8766 }
8767 addend -= SYM_VAL (sda);
8768
8769 name = bfd_get_section_name (output_bfd, sec->output_section);
8770 if (!(strcmp (name, ".sdata2") == 0
8771 || strcmp (name, ".sbss2") == 0))
8772 {
8773 info->callbacks->einfo
8774 (_("%P: %B: the target (%s) of a %s relocation is "
8775 "in the wrong output section (%s)\n"),
8776 input_bfd,
8777 sym_name,
8778 howto->name,
8779 name);
8780 }
8781 }
8782 break;
8783
8784 case R_PPC_VLE_LO16A:
8785 relocation = relocation + addend;
8786 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8787 relocation, split16a_type);
8788 continue;
8789
8790 case R_PPC_VLE_LO16D:
8791 relocation = relocation + addend;
8792 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8793 relocation, split16d_type);
8794 continue;
8795
8796 case R_PPC_VLE_HI16A:
8797 relocation = (relocation + addend) >> 16;
8798 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8799 relocation, split16a_type);
8800 continue;
8801
8802 case R_PPC_VLE_HI16D:
8803 relocation = (relocation + addend) >> 16;
8804 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8805 relocation, split16d_type);
8806 continue;
8807
8808 case R_PPC_VLE_HA16A:
8809 relocation = (relocation + addend + 0x8000) >> 16;
8810 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8811 relocation, split16a_type);
8812 continue;
8813
8814 case R_PPC_VLE_HA16D:
8815 relocation = (relocation + addend + 0x8000) >> 16;
8816 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8817 relocation, split16d_type);
8818 continue;
8819
8820 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8821 case R_PPC_EMB_SDA21:
8822 case R_PPC_VLE_SDA21:
8823 case R_PPC_EMB_RELSDA:
8824 case R_PPC_VLE_SDA21_LO:
8825 {
8826 const char *name;
8827 int reg;
8828 unsigned int insn;
8829 struct elf_link_hash_entry *sda = NULL;
8830
8831 if (sec == NULL || sec->output_section == NULL)
8832 {
8833 unresolved_reloc = TRUE;
8834 break;
8835 }
8836
8837 name = bfd_get_section_name (output_bfd, sec->output_section);
8838 if (strcmp (name, ".sdata") == 0
8839 || strcmp (name, ".sbss") == 0)
8840 {
8841 reg = 13;
8842 sda = htab->sdata[0].sym;
8843 }
8844 else if (strcmp (name, ".sdata2") == 0
8845 || strcmp (name, ".sbss2") == 0)
8846 {
8847 reg = 2;
8848 sda = htab->sdata[1].sym;
8849 }
8850 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8851 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8852 {
8853 reg = 0;
8854 }
8855 else
8856 {
8857 info->callbacks->einfo
8858 (_("%P: %B: the target (%s) of a %s relocation is "
8859 "in the wrong output section (%s)\n"),
8860 input_bfd,
8861 sym_name,
8862 howto->name,
8863 name);
8864
8865 bfd_set_error (bfd_error_bad_value);
8866 ret = FALSE;
8867 continue;
8868 }
8869
8870 if (sda != NULL)
8871 {
8872 if (!is_static_defined (sda))
8873 {
8874 unresolved_reloc = TRUE;
8875 break;
8876 }
8877 addend -= SYM_VAL (sda);
8878 }
8879
8880 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8881 if (reg == 0
8882 && (r_type == R_PPC_VLE_SDA21
8883 || r_type == R_PPC_VLE_SDA21_LO))
8884 {
8885 relocation = relocation + addend;
8886 addend = 0;
8887
8888 /* Force e_li insn, keeping RT from original insn. */
8889 insn &= 0x1f << 21;
8890 insn |= 28u << 26;
8891
8892 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
8893 /* Top 4 bits of value to 17..20. */
8894 insn |= (relocation & 0xf0000) >> 5;
8895 /* Next 5 bits of the value to 11..15. */
8896 insn |= (relocation & 0xf800) << 5;
8897 /* And the final 11 bits of the value to bits 21 to 31. */
8898 insn |= relocation & 0x7ff;
8899
8900 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8901
8902 if (r_type == R_PPC_VLE_SDA21
8903 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
8904 goto overflow;
8905 continue;
8906 }
8907 else if (r_type == R_PPC_EMB_SDA21
8908 || r_type == R_PPC_VLE_SDA21
8909 || r_type == R_PPC_VLE_SDA21_LO)
8910 {
8911 /* Fill in register field. */
8912 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8913 }
8914 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8915 }
8916 break;
8917
8918 case R_PPC_VLE_SDAREL_LO16A:
8919 case R_PPC_VLE_SDAREL_LO16D:
8920 case R_PPC_VLE_SDAREL_HI16A:
8921 case R_PPC_VLE_SDAREL_HI16D:
8922 case R_PPC_VLE_SDAREL_HA16A:
8923 case R_PPC_VLE_SDAREL_HA16D:
8924 {
8925 bfd_vma value;
8926 const char *name;
8927 //int reg;
8928 struct elf_link_hash_entry *sda = NULL;
8929
8930 if (sec == NULL || sec->output_section == NULL)
8931 {
8932 unresolved_reloc = TRUE;
8933 break;
8934 }
8935
8936 name = bfd_get_section_name (output_bfd, sec->output_section);
8937 if (strcmp (name, ".sdata") == 0
8938 || strcmp (name, ".sbss") == 0)
8939 {
8940 //reg = 13;
8941 sda = htab->sdata[0].sym;
8942 }
8943 else if (strcmp (name, ".sdata2") == 0
8944 || strcmp (name, ".sbss2") == 0)
8945 {
8946 //reg = 2;
8947 sda = htab->sdata[1].sym;
8948 }
8949 else
8950 {
8951 (*_bfd_error_handler)
8952 (_("%B: the target (%s) of a %s relocation is "
8953 "in the wrong output section (%s)"),
8954 input_bfd,
8955 sym_name,
8956 howto->name,
8957 name);
8958
8959 bfd_set_error (bfd_error_bad_value);
8960 ret = FALSE;
8961 continue;
8962 }
8963
8964 if (sda != NULL)
8965 {
8966 if (!is_static_defined (sda))
8967 {
8968 unresolved_reloc = TRUE;
8969 break;
8970 }
8971 }
8972
8973 value = (sda->root.u.def.section->output_section->vma
8974 + sda->root.u.def.section->output_offset
8975 + addend);
8976
8977 if (r_type == R_PPC_VLE_SDAREL_LO16A)
8978 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8979 value, split16a_type);
8980 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
8981 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8982 value, split16d_type);
8983 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
8984 {
8985 value = value >> 16;
8986 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8987 value, split16a_type);
8988 }
8989 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
8990 {
8991 value = value >> 16;
8992 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8993 value, split16d_type);
8994 }
8995 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
8996 {
8997 value = (value + 0x8000) >> 16;
8998 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8999 value, split16a_type);
9000 }
9001 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9002 {
9003 value = (value + 0x8000) >> 16;
9004 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9005 value, split16d_type);
9006 }
9007 }
9008 continue;
9009
9010 /* Relocate against the beginning of the section. */
9011 case R_PPC_SECTOFF:
9012 case R_PPC_SECTOFF_LO:
9013 case R_PPC_SECTOFF_HI:
9014 case R_PPC_SECTOFF_HA:
9015 if (sec == NULL || sec->output_section == NULL)
9016 {
9017 unresolved_reloc = TRUE;
9018 break;
9019 }
9020 addend -= sec->output_section->vma;
9021 break;
9022
9023 /* Negative relocations. */
9024 case R_PPC_EMB_NADDR32:
9025 case R_PPC_EMB_NADDR16:
9026 case R_PPC_EMB_NADDR16_LO:
9027 case R_PPC_EMB_NADDR16_HI:
9028 case R_PPC_EMB_NADDR16_HA:
9029 addend -= 2 * relocation;
9030 break;
9031
9032 case R_PPC_COPY:
9033 case R_PPC_GLOB_DAT:
9034 case R_PPC_JMP_SLOT:
9035 case R_PPC_RELATIVE:
9036 case R_PPC_IRELATIVE:
9037 case R_PPC_PLT32:
9038 case R_PPC_PLTREL32:
9039 case R_PPC_PLT16_LO:
9040 case R_PPC_PLT16_HI:
9041 case R_PPC_PLT16_HA:
9042 case R_PPC_ADDR30:
9043 case R_PPC_EMB_RELSEC16:
9044 case R_PPC_EMB_RELST_LO:
9045 case R_PPC_EMB_RELST_HI:
9046 case R_PPC_EMB_RELST_HA:
9047 case R_PPC_EMB_BIT_FLD:
9048 info->callbacks->einfo
9049 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9050 input_bfd,
9051 howto->name,
9052 sym_name);
9053
9054 bfd_set_error (bfd_error_invalid_operation);
9055 ret = FALSE;
9056 continue;
9057 }
9058
9059 /* Do any further special processing. */
9060 switch (r_type)
9061 {
9062 default:
9063 break;
9064
9065 case R_PPC_ADDR16_HA:
9066 case R_PPC_REL16_HA:
9067 case R_PPC_SECTOFF_HA:
9068 case R_PPC_TPREL16_HA:
9069 case R_PPC_DTPREL16_HA:
9070 case R_PPC_EMB_NADDR16_HA:
9071 case R_PPC_EMB_RELST_HA:
9072 /* It's just possible that this symbol is a weak symbol
9073 that's not actually defined anywhere. In that case,
9074 'sec' would be NULL, and we should leave the symbol
9075 alone (it will be set to zero elsewhere in the link). */
9076 if (sec == NULL)
9077 break;
9078 /* Fall thru */
9079
9080 case R_PPC_PLT16_HA:
9081 case R_PPC_GOT16_HA:
9082 case R_PPC_GOT_TLSGD16_HA:
9083 case R_PPC_GOT_TLSLD16_HA:
9084 case R_PPC_GOT_TPREL16_HA:
9085 case R_PPC_GOT_DTPREL16_HA:
9086 /* Add 0x10000 if sign bit in 0:15 is set.
9087 Bits 0:15 are not used. */
9088 addend += 0x8000;
9089 break;
9090
9091 case R_PPC_ADDR16:
9092 case R_PPC_ADDR16_LO:
9093 case R_PPC_GOT16:
9094 case R_PPC_GOT16_LO:
9095 case R_PPC_SDAREL16:
9096 case R_PPC_SECTOFF:
9097 case R_PPC_SECTOFF_LO:
9098 case R_PPC_DTPREL16:
9099 case R_PPC_DTPREL16_LO:
9100 case R_PPC_TPREL16:
9101 case R_PPC_TPREL16_LO:
9102 case R_PPC_GOT_TLSGD16:
9103 case R_PPC_GOT_TLSGD16_LO:
9104 case R_PPC_GOT_TLSLD16:
9105 case R_PPC_GOT_TLSLD16_LO:
9106 case R_PPC_GOT_DTPREL16:
9107 case R_PPC_GOT_DTPREL16_LO:
9108 case R_PPC_GOT_TPREL16:
9109 case R_PPC_GOT_TPREL16_LO:
9110 {
9111 /* The 32-bit ABI lacks proper relocations to deal with
9112 certain 64-bit instructions. Prevent damage to bits
9113 that make up part of the insn opcode. */
9114 unsigned int insn, mask, lobit;
9115
9116 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
9117 mask = 0;
9118 if (is_insn_ds_form (insn))
9119 mask = 3;
9120 else if (is_insn_dq_form (insn))
9121 mask = 15;
9122 else
9123 break;
9124 lobit = mask & (relocation + addend);
9125 if (lobit != 0)
9126 {
9127 addend -= lobit;
9128 info->callbacks->einfo
9129 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9130 input_bfd, input_section, rel->r_offset,
9131 howto->name, sym_name, mask + 1);
9132 bfd_set_error (bfd_error_bad_value);
9133 ret = FALSE;
9134 }
9135 addend += insn & mask;
9136 }
9137 break;
9138 }
9139
9140 #ifdef DEBUG
9141 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9142 "offset = %ld, addend = %ld\n",
9143 howto->name,
9144 (int) r_type,
9145 sym_name,
9146 r_symndx,
9147 (long) rel->r_offset,
9148 (long) addend);
9149 #endif
9150
9151 if (unresolved_reloc
9152 && !((input_section->flags & SEC_DEBUGGING) != 0
9153 && h->def_dynamic)
9154 && _bfd_elf_section_offset (output_bfd, info, input_section,
9155 rel->r_offset) != (bfd_vma) -1)
9156 {
9157 info->callbacks->einfo
9158 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9159 input_bfd, input_section, rel->r_offset,
9160 howto->name,
9161 sym_name);
9162 ret = FALSE;
9163 }
9164
9165 /* 16-bit fields in insns mostly have signed values, but a
9166 few insns have 16-bit unsigned values. Really, we should
9167 have different reloc types. */
9168 if (howto->complain_on_overflow != complain_overflow_dont
9169 && howto->dst_mask == 0xffff
9170 && (input_section->flags & SEC_CODE) != 0)
9171 {
9172 enum complain_overflow complain = complain_overflow_signed;
9173
9174 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9175 {
9176 unsigned int insn;
9177
9178 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9179 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9180 complain = complain_overflow_bitfield;
9181 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9182 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9183 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9184 complain = complain_overflow_unsigned;
9185 }
9186 if (howto->complain_on_overflow != complain)
9187 {
9188 alt_howto = *howto;
9189 alt_howto.complain_on_overflow = complain;
9190 howto = &alt_howto;
9191 }
9192 }
9193
9194 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9195 rel->r_offset, relocation, addend);
9196
9197 if (r != bfd_reloc_ok)
9198 {
9199 if (r == bfd_reloc_overflow)
9200 {
9201 overflow:
9202 if (warned)
9203 continue;
9204 if (h != NULL
9205 && h->root.type == bfd_link_hash_undefweak
9206 && howto->pc_relative)
9207 {
9208 /* Assume this is a call protected by other code that
9209 detect the symbol is undefined. If this is the case,
9210 we can safely ignore the overflow. If not, the
9211 program is hosed anyway, and a little warning isn't
9212 going to help. */
9213
9214 continue;
9215 }
9216
9217 if (! (*info->callbacks->reloc_overflow) (info,
9218 (h ? &h->root : NULL),
9219 sym_name,
9220 howto->name,
9221 rel->r_addend,
9222 input_bfd,
9223 input_section,
9224 rel->r_offset))
9225 return FALSE;
9226 }
9227 else
9228 {
9229 info->callbacks->einfo
9230 (_("%P: %H: %s reloc against `%s': error %d\n"),
9231 input_bfd, input_section, rel->r_offset,
9232 howto->name, sym_name, (int) r);
9233 ret = FALSE;
9234 }
9235 }
9236 }
9237
9238 #ifdef DEBUG
9239 fprintf (stderr, "\n");
9240 #endif
9241
9242 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9243 && input_section->size != input_section->rawsize
9244 && (strcmp (input_section->output_section->name, ".init") == 0
9245 || strcmp (input_section->output_section->name, ".fini") == 0))
9246 {
9247 /* Branch around the trampolines. */
9248 unsigned int insn = B + input_section->size - input_section->rawsize;
9249 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9250 }
9251
9252 if (htab->params->ppc476_workaround
9253 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9254 && (!info->relocatable
9255 || (input_section->output_section->alignment_power
9256 >= htab->params->pagesize_p2)))
9257 {
9258 struct ppc_elf_relax_info *relax_info;
9259 bfd_vma start_addr, end_addr, addr;
9260 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9261
9262 relax_info = elf_section_data (input_section)->sec_info;
9263 if (relax_info->workaround_size != 0)
9264 {
9265 bfd_byte *p;
9266 unsigned int n;
9267 bfd_byte fill[4];
9268
9269 bfd_put_32 (input_bfd, BA, fill);
9270 p = contents + input_section->size - relax_info->workaround_size;
9271 n = relax_info->workaround_size >> 2;
9272 while (n--)
9273 {
9274 memcpy (p, fill, 4);
9275 p += 4;
9276 }
9277 }
9278
9279 /* The idea is: Replace the last instruction on a page with a
9280 branch to a patch area. Put the insn there followed by a
9281 branch back to the next page. Complicated a little by
9282 needing to handle moved conditional branches, and by not
9283 wanting to touch data-in-text. */
9284
9285 start_addr = (input_section->output_section->vma
9286 + input_section->output_offset);
9287 end_addr = (start_addr + input_section->size
9288 - relax_info->workaround_size);
9289 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9290 addr < end_addr;
9291 addr += pagesize)
9292 {
9293 bfd_vma offset = addr - start_addr;
9294 Elf_Internal_Rela *lo, *hi;
9295 bfd_boolean is_data;
9296 bfd_vma patch_off, patch_addr;
9297 unsigned int insn;
9298
9299 /* Do we have a data reloc at this offset? If so, leave
9300 the word alone. */
9301 is_data = FALSE;
9302 lo = relocs;
9303 hi = relend;
9304 rel = NULL;
9305 while (lo < hi)
9306 {
9307 rel = lo + (hi - lo) / 2;
9308 if (rel->r_offset < offset)
9309 lo = rel + 1;
9310 else if (rel->r_offset > offset + 3)
9311 hi = rel;
9312 else
9313 {
9314 switch (ELF32_R_TYPE (rel->r_info))
9315 {
9316 case R_PPC_ADDR32:
9317 case R_PPC_UADDR32:
9318 case R_PPC_REL32:
9319 case R_PPC_ADDR30:
9320 is_data = TRUE;
9321 break;
9322 default:
9323 break;
9324 }
9325 break;
9326 }
9327 }
9328 if (is_data)
9329 continue;
9330
9331 /* Some instructions can be left alone too. Unconditional
9332 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9333 avoid the icache failure.
9334
9335 The problem occurs due to prefetch across a page boundary
9336 where stale instructions can be fetched from the next
9337 page, and the mechanism for flushing these bad
9338 instructions fails under certain circumstances. The
9339 unconditional branches:
9340 1) Branch: b, bl, ba, bla,
9341 2) Branch Conditional: bc, bca, bcl, bcla,
9342 3) Branch Conditional to Link Register: bclr, bclrl,
9343 where (2) and (3) have BO=0x14 making them unconditional,
9344 prevent the bad prefetch because the prefetch itself is
9345 affected by these instructions. This happens even if the
9346 instruction is not executed.
9347
9348 A bctr example:
9349 .
9350 . lis 9,new_page@ha
9351 . addi 9,9,new_page@l
9352 . mtctr 9
9353 . bctr
9354 . nop
9355 . nop
9356 . new_page:
9357 .
9358 The bctr is not predicted taken due to ctr not being
9359 ready, so prefetch continues on past the bctr into the
9360 new page which might have stale instructions. If they
9361 fail to be flushed, then they will be executed after the
9362 bctr executes. Either of the following modifications
9363 prevent the bad prefetch from happening in the first
9364 place:
9365 .
9366 . lis 9,new_page@ha lis 9,new_page@ha
9367 . addi 9,9,new_page@l addi 9,9,new_page@l
9368 . mtctr 9 mtctr 9
9369 . bctr bctr
9370 . nop b somewhere_else
9371 . b somewhere_else nop
9372 . new_page: new_page:
9373 . */
9374 insn = bfd_get_32 (input_bfd, contents + offset);
9375 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9376 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9377 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9378 || ((insn & (0x3f << 26)) == (19u << 26)
9379 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9380 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9381 continue;
9382
9383 patch_addr = (start_addr + input_section->size
9384 - relax_info->workaround_size);
9385 patch_addr = (patch_addr + 15) & -16;
9386 patch_off = patch_addr - start_addr;
9387 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9388
9389 if (rel != NULL
9390 && rel->r_offset >= offset
9391 && rel->r_offset < offset + 4)
9392 {
9393 /* If the insn we are patching had a reloc, adjust the
9394 reloc r_offset so that the reloc applies to the moved
9395 location. This matters for -r and --emit-relocs. */
9396 if (rel + 1 != relend)
9397 {
9398 Elf_Internal_Rela tmp = *rel;
9399
9400 /* Keep the relocs sorted by r_offset. */
9401 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9402 relend[-1] = tmp;
9403 }
9404 relend[-1].r_offset += patch_off - offset;
9405 }
9406 else
9407 rel = NULL;
9408
9409 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9410 && (insn & 2) == 0 /* relative */)
9411 {
9412 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9413
9414 delta += offset - patch_off;
9415 if (info->relocatable && rel != NULL)
9416 delta = 0;
9417 if (!info->relocatable && rel != NULL)
9418 {
9419 enum elf_ppc_reloc_type r_type;
9420
9421 r_type = ELF32_R_TYPE (relend[-1].r_info);
9422 if (r_type == R_PPC_REL14_BRTAKEN)
9423 insn |= BRANCH_PREDICT_BIT;
9424 else if (r_type == R_PPC_REL14_BRNTAKEN)
9425 insn &= ~BRANCH_PREDICT_BIT;
9426 else
9427 BFD_ASSERT (r_type == R_PPC_REL14);
9428
9429 if ((r_type == R_PPC_REL14_BRTAKEN
9430 || r_type == R_PPC_REL14_BRNTAKEN)
9431 && delta + 0x8000 < 0x10000
9432 && (bfd_signed_vma) delta < 0)
9433 insn ^= BRANCH_PREDICT_BIT;
9434 }
9435 if (delta + 0x8000 < 0x10000)
9436 {
9437 bfd_put_32 (input_bfd,
9438 (insn & ~0xfffc) | (delta & 0xfffc),
9439 contents + patch_off);
9440 patch_off += 4;
9441 bfd_put_32 (input_bfd,
9442 B | ((offset + 4 - patch_off) & 0x3fffffc),
9443 contents + patch_off);
9444 patch_off += 4;
9445 }
9446 else
9447 {
9448 if (rel != NULL)
9449 {
9450 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9451
9452 relend[-1].r_offset += 8;
9453 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9454 }
9455 bfd_put_32 (input_bfd,
9456 (insn & ~0xfffc) | 8,
9457 contents + patch_off);
9458 patch_off += 4;
9459 bfd_put_32 (input_bfd,
9460 B | ((offset + 4 - patch_off) & 0x3fffffc),
9461 contents + patch_off);
9462 patch_off += 4;
9463 bfd_put_32 (input_bfd,
9464 B | ((delta - 8) & 0x3fffffc),
9465 contents + patch_off);
9466 patch_off += 4;
9467 }
9468 }
9469 else
9470 {
9471 bfd_put_32 (input_bfd, insn, contents + patch_off);
9472 patch_off += 4;
9473 bfd_put_32 (input_bfd,
9474 B | ((offset + 4 - patch_off) & 0x3fffffc),
9475 contents + patch_off);
9476 patch_off += 4;
9477 }
9478 BFD_ASSERT (patch_off <= input_section->size);
9479 relax_info->workaround_size = input_section->size - patch_off;
9480 }
9481 }
9482
9483 return ret;
9484 }
9485
9486 /* Finish up dynamic symbol handling. We set the contents of various
9487 dynamic sections here. */
9488
9489 static bfd_boolean
ppc_elf_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)9490 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9491 struct bfd_link_info *info,
9492 struct elf_link_hash_entry *h,
9493 Elf_Internal_Sym *sym)
9494 {
9495 struct ppc_elf_link_hash_table *htab;
9496 struct plt_entry *ent;
9497 bfd_boolean doneone;
9498
9499 #ifdef DEBUG
9500 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9501 h->root.root.string);
9502 #endif
9503
9504 htab = ppc_elf_hash_table (info);
9505 BFD_ASSERT (htab->elf.dynobj != NULL);
9506
9507 doneone = FALSE;
9508 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9509 if (ent->plt.offset != (bfd_vma) -1)
9510 {
9511 if (!doneone)
9512 {
9513 Elf_Internal_Rela rela;
9514 bfd_byte *loc;
9515 bfd_vma reloc_index;
9516
9517 if (htab->plt_type == PLT_NEW
9518 || !htab->elf.dynamic_sections_created
9519 || h->dynindx == -1)
9520 reloc_index = ent->plt.offset / 4;
9521 else
9522 {
9523 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9524 / htab->plt_slot_size);
9525 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9526 && htab->plt_type == PLT_OLD)
9527 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9528 }
9529
9530 /* This symbol has an entry in the procedure linkage table.
9531 Set it up. */
9532 if (htab->plt_type == PLT_VXWORKS
9533 && htab->elf.dynamic_sections_created
9534 && h->dynindx != -1)
9535 {
9536 bfd_vma got_offset;
9537 const bfd_vma *plt_entry;
9538
9539 /* The first three entries in .got.plt are reserved. */
9540 got_offset = (reloc_index + 3) * 4;
9541
9542 /* Use the right PLT. */
9543 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
9544 : ppc_elf_vxworks_plt_entry;
9545
9546 /* Fill in the .plt on VxWorks. */
9547 if (info->shared)
9548 {
9549 bfd_put_32 (output_bfd,
9550 plt_entry[0] | PPC_HA (got_offset),
9551 htab->plt->contents + ent->plt.offset + 0);
9552 bfd_put_32 (output_bfd,
9553 plt_entry[1] | PPC_LO (got_offset),
9554 htab->plt->contents + ent->plt.offset + 4);
9555 }
9556 else
9557 {
9558 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9559
9560 bfd_put_32 (output_bfd,
9561 plt_entry[0] | PPC_HA (got_loc),
9562 htab->plt->contents + ent->plt.offset + 0);
9563 bfd_put_32 (output_bfd,
9564 plt_entry[1] | PPC_LO (got_loc),
9565 htab->plt->contents + ent->plt.offset + 4);
9566 }
9567
9568 bfd_put_32 (output_bfd, plt_entry[2],
9569 htab->plt->contents + ent->plt.offset + 8);
9570 bfd_put_32 (output_bfd, plt_entry[3],
9571 htab->plt->contents + ent->plt.offset + 12);
9572
9573 /* This instruction is an immediate load. The value loaded is
9574 the byte offset of the R_PPC_JMP_SLOT relocation from the
9575 start of the .rela.plt section. The value is stored in the
9576 low-order 16 bits of the load instruction. */
9577 /* NOTE: It appears that this is now an index rather than a
9578 prescaled offset. */
9579 bfd_put_32 (output_bfd,
9580 plt_entry[4] | reloc_index,
9581 htab->plt->contents + ent->plt.offset + 16);
9582 /* This instruction is a PC-relative branch whose target is
9583 the start of the PLT section. The address of this branch
9584 instruction is 20 bytes beyond the start of this PLT entry.
9585 The address is encoded in bits 6-29, inclusive. The value
9586 stored is right-shifted by two bits, permitting a 26-bit
9587 offset. */
9588 bfd_put_32 (output_bfd,
9589 (plt_entry[5]
9590 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9591 htab->plt->contents + ent->plt.offset + 20);
9592 bfd_put_32 (output_bfd, plt_entry[6],
9593 htab->plt->contents + ent->plt.offset + 24);
9594 bfd_put_32 (output_bfd, plt_entry[7],
9595 htab->plt->contents + ent->plt.offset + 28);
9596
9597 /* Fill in the GOT entry corresponding to this PLT slot with
9598 the address immediately after the "bctr" instruction
9599 in this PLT entry. */
9600 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
9601 + htab->plt->output_offset
9602 + ent->plt.offset + 16),
9603 htab->sgotplt->contents + got_offset);
9604
9605 if (!info->shared)
9606 {
9607 /* Fill in a couple of entries in .rela.plt.unloaded. */
9608 loc = htab->srelplt2->contents
9609 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9610 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9611 * sizeof (Elf32_External_Rela));
9612
9613 /* Provide the @ha relocation for the first instruction. */
9614 rela.r_offset = (htab->plt->output_section->vma
9615 + htab->plt->output_offset
9616 + ent->plt.offset + 2);
9617 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9618 R_PPC_ADDR16_HA);
9619 rela.r_addend = got_offset;
9620 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9621 loc += sizeof (Elf32_External_Rela);
9622
9623 /* Provide the @l relocation for the second instruction. */
9624 rela.r_offset = (htab->plt->output_section->vma
9625 + htab->plt->output_offset
9626 + ent->plt.offset + 6);
9627 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9628 R_PPC_ADDR16_LO);
9629 rela.r_addend = got_offset;
9630 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9631 loc += sizeof (Elf32_External_Rela);
9632
9633 /* Provide a relocation for the GOT entry corresponding to this
9634 PLT slot. Point it at the middle of the .plt entry. */
9635 rela.r_offset = (htab->sgotplt->output_section->vma
9636 + htab->sgotplt->output_offset
9637 + got_offset);
9638 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9639 R_PPC_ADDR32);
9640 rela.r_addend = ent->plt.offset + 16;
9641 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9642 }
9643
9644 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9645 In particular, the offset for the relocation is not the
9646 address of the PLT entry for this function, as specified
9647 by the ABI. Instead, the offset is set to the address of
9648 the GOT slot for this function. See EABI 4.4.4.1. */
9649 rela.r_offset = (htab->sgotplt->output_section->vma
9650 + htab->sgotplt->output_offset
9651 + got_offset);
9652
9653 }
9654 else
9655 {
9656 asection *splt = htab->plt;
9657 if (!htab->elf.dynamic_sections_created
9658 || h->dynindx == -1)
9659 splt = htab->iplt;
9660
9661 rela.r_offset = (splt->output_section->vma
9662 + splt->output_offset
9663 + ent->plt.offset);
9664 if (htab->plt_type == PLT_OLD
9665 || !htab->elf.dynamic_sections_created
9666 || h->dynindx == -1)
9667 {
9668 /* We don't need to fill in the .plt. The ppc dynamic
9669 linker will fill it in. */
9670 }
9671 else
9672 {
9673 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9674 + htab->glink->output_section->vma
9675 + htab->glink->output_offset);
9676 bfd_put_32 (output_bfd, val,
9677 splt->contents + ent->plt.offset);
9678 }
9679 }
9680
9681 /* Fill in the entry in the .rela.plt section. */
9682 rela.r_addend = 0;
9683 if (!htab->elf.dynamic_sections_created
9684 || h->dynindx == -1)
9685 {
9686 BFD_ASSERT (h->type == STT_GNU_IFUNC
9687 && h->def_regular
9688 && (h->root.type == bfd_link_hash_defined
9689 || h->root.type == bfd_link_hash_defweak));
9690 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9691 rela.r_addend = SYM_VAL (h);
9692 }
9693 else
9694 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9695
9696 if (!htab->elf.dynamic_sections_created
9697 || h->dynindx == -1)
9698 loc = (htab->reliplt->contents
9699 + (htab->reliplt->reloc_count++
9700 * sizeof (Elf32_External_Rela)));
9701 else
9702 loc = (htab->relplt->contents
9703 + reloc_index * sizeof (Elf32_External_Rela));
9704 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9705
9706 if (!h->def_regular)
9707 {
9708 /* Mark the symbol as undefined, rather than as
9709 defined in the .plt section. Leave the value if
9710 there were any relocations where pointer equality
9711 matters (this is a clue for the dynamic linker, to
9712 make function pointer comparisons work between an
9713 application and shared library), otherwise set it
9714 to zero. */
9715 sym->st_shndx = SHN_UNDEF;
9716 if (!h->pointer_equality_needed)
9717 sym->st_value = 0;
9718 else if (!h->ref_regular_nonweak)
9719 {
9720 /* This breaks function pointer comparisons, but
9721 that is better than breaking tests for a NULL
9722 function pointer. */
9723 sym->st_value = 0;
9724 }
9725 }
9726 else if (h->type == STT_GNU_IFUNC
9727 && !info->shared)
9728 {
9729 /* Set the value of ifunc symbols in a non-pie
9730 executable to the glink entry. This is to avoid
9731 text relocations. We can't do this for ifunc in
9732 allocate_dynrelocs, as we do for normal dynamic
9733 function symbols with plt entries, because we need
9734 to keep the original value around for the ifunc
9735 relocation. */
9736 sym->st_shndx = (_bfd_elf_section_from_bfd_section
9737 (output_bfd, htab->glink->output_section));
9738 sym->st_value = (ent->glink_offset
9739 + htab->glink->output_offset
9740 + htab->glink->output_section->vma);
9741 }
9742 doneone = TRUE;
9743 }
9744
9745 if (htab->plt_type == PLT_NEW
9746 || !htab->elf.dynamic_sections_created
9747 || h->dynindx == -1)
9748 {
9749 unsigned char *p;
9750 asection *splt = htab->plt;
9751 if (!htab->elf.dynamic_sections_created
9752 || h->dynindx == -1)
9753 splt = htab->iplt;
9754
9755 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9756
9757 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
9758 {
9759 bfd_put_32 (output_bfd, LWZ_11_3, p);
9760 p += 4;
9761 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
9762 p += 4;
9763 bfd_put_32 (output_bfd, MR_0_3, p);
9764 p += 4;
9765 bfd_put_32 (output_bfd, CMPWI_11_0, p);
9766 p += 4;
9767 bfd_put_32 (output_bfd, ADD_3_12_2, p);
9768 p += 4;
9769 bfd_put_32 (output_bfd, BEQLR, p);
9770 p += 4;
9771 bfd_put_32 (output_bfd, MR_3_0, p);
9772 p += 4;
9773 bfd_put_32 (output_bfd, NOP, p);
9774 p += 4;
9775 }
9776
9777 write_glink_stub (ent, splt, p, info);
9778
9779 if (!info->shared)
9780 /* We only need one non-PIC glink stub. */
9781 break;
9782 }
9783 else
9784 break;
9785 }
9786
9787 if (h->needs_copy)
9788 {
9789 asection *s;
9790 Elf_Internal_Rela rela;
9791 bfd_byte *loc;
9792
9793 /* This symbols needs a copy reloc. Set it up. */
9794
9795 #ifdef DEBUG
9796 fprintf (stderr, ", copy");
9797 #endif
9798
9799 BFD_ASSERT (h->dynindx != -1);
9800
9801 if (ppc_elf_hash_entry (h)->has_sda_refs)
9802 s = htab->relsbss;
9803 else
9804 s = htab->relbss;
9805 BFD_ASSERT (s != NULL);
9806
9807 rela.r_offset = SYM_VAL (h);
9808 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9809 rela.r_addend = 0;
9810 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9811 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9812 }
9813
9814 #ifdef DEBUG
9815 fprintf (stderr, "\n");
9816 #endif
9817
9818 return TRUE;
9819 }
9820
9821 static enum elf_reloc_type_class
ppc_elf_reloc_type_class(const struct bfd_link_info * info,const asection * rel_sec,const Elf_Internal_Rela * rela)9822 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9823 const asection *rel_sec,
9824 const Elf_Internal_Rela *rela)
9825 {
9826 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9827
9828 if (rel_sec == htab->reliplt)
9829 return reloc_class_ifunc;
9830
9831 switch (ELF32_R_TYPE (rela->r_info))
9832 {
9833 case R_PPC_RELATIVE:
9834 return reloc_class_relative;
9835 case R_PPC_JMP_SLOT:
9836 return reloc_class_plt;
9837 case R_PPC_COPY:
9838 return reloc_class_copy;
9839 default:
9840 return reloc_class_normal;
9841 }
9842 }
9843
9844 /* Finish up the dynamic sections. */
9845
9846 static bfd_boolean
ppc_elf_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)9847 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9848 struct bfd_link_info *info)
9849 {
9850 asection *sdyn;
9851 asection *splt;
9852 struct ppc_elf_link_hash_table *htab;
9853 bfd_vma got;
9854 bfd *dynobj;
9855 bfd_boolean ret = TRUE;
9856
9857 #ifdef DEBUG
9858 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9859 #endif
9860
9861 htab = ppc_elf_hash_table (info);
9862 dynobj = elf_hash_table (info)->dynobj;
9863 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9864 if (htab->is_vxworks)
9865 splt = bfd_get_linker_section (dynobj, ".plt");
9866 else
9867 splt = NULL;
9868
9869 got = 0;
9870 if (htab->elf.hgot != NULL)
9871 got = SYM_VAL (htab->elf.hgot);
9872
9873 if (htab->elf.dynamic_sections_created)
9874 {
9875 Elf32_External_Dyn *dyncon, *dynconend;
9876
9877 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
9878
9879 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9880 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9881 for (; dyncon < dynconend; dyncon++)
9882 {
9883 Elf_Internal_Dyn dyn;
9884 asection *s;
9885
9886 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9887
9888 switch (dyn.d_tag)
9889 {
9890 case DT_PLTGOT:
9891 if (htab->is_vxworks)
9892 s = htab->sgotplt;
9893 else
9894 s = htab->plt;
9895 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9896 break;
9897
9898 case DT_PLTRELSZ:
9899 dyn.d_un.d_val = htab->relplt->size;
9900 break;
9901
9902 case DT_JMPREL:
9903 s = htab->relplt;
9904 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9905 break;
9906
9907 case DT_PPC_GOT:
9908 dyn.d_un.d_ptr = got;
9909 break;
9910
9911 case DT_RELASZ:
9912 if (htab->is_vxworks)
9913 {
9914 if (htab->relplt)
9915 dyn.d_un.d_ptr -= htab->relplt->size;
9916 break;
9917 }
9918 continue;
9919
9920 default:
9921 if (htab->is_vxworks
9922 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9923 break;
9924 continue;
9925 }
9926
9927 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9928 }
9929 }
9930
9931 if (htab->got != NULL)
9932 {
9933 if (htab->elf.hgot->root.u.def.section == htab->got
9934 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
9935 {
9936 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9937
9938 p += htab->elf.hgot->root.u.def.value;
9939 if (htab->plt_type == PLT_OLD)
9940 {
9941 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
9942 so that a function can easily find the address of
9943 _GLOBAL_OFFSET_TABLE_. */
9944 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
9945 < htab->elf.hgot->root.u.def.section->size);
9946 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
9947 }
9948
9949 if (sdyn != NULL)
9950 {
9951 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
9952 BFD_ASSERT (htab->elf.hgot->root.u.def.value
9953 < htab->elf.hgot->root.u.def.section->size);
9954 bfd_put_32 (output_bfd, val, p);
9955 }
9956 }
9957 else
9958 {
9959 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
9960 htab->elf.hgot->root.root.string,
9961 (htab->sgotplt != NULL
9962 ? htab->sgotplt->name : htab->got->name));
9963 bfd_set_error (bfd_error_bad_value);
9964 ret = FALSE;
9965 }
9966
9967 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
9968 }
9969
9970 /* Fill in the first entry in the VxWorks procedure linkage table. */
9971 if (splt && splt->size > 0)
9972 {
9973 /* Use the right PLT. */
9974 const bfd_vma *plt_entry = (info->shared
9975 ? ppc_elf_vxworks_pic_plt0_entry
9976 : ppc_elf_vxworks_plt0_entry);
9977
9978 if (!info->shared)
9979 {
9980 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
9981
9982 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
9983 splt->contents + 0);
9984 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
9985 splt->contents + 4);
9986 }
9987 else
9988 {
9989 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
9990 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
9991 }
9992 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
9993 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
9994 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
9995 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
9996 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
9997 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
9998
9999 if (! info->shared)
10000 {
10001 Elf_Internal_Rela rela;
10002 bfd_byte *loc;
10003
10004 loc = htab->srelplt2->contents;
10005
10006 /* Output the @ha relocation for the first instruction. */
10007 rela.r_offset = (htab->plt->output_section->vma
10008 + htab->plt->output_offset
10009 + 2);
10010 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10011 rela.r_addend = 0;
10012 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10013 loc += sizeof (Elf32_External_Rela);
10014
10015 /* Output the @l relocation for the second instruction. */
10016 rela.r_offset = (htab->plt->output_section->vma
10017 + htab->plt->output_offset
10018 + 6);
10019 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10020 rela.r_addend = 0;
10021 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10022 loc += sizeof (Elf32_External_Rela);
10023
10024 /* Fix up the remaining relocations. They may have the wrong
10025 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10026 in which symbols were output. */
10027 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10028 {
10029 Elf_Internal_Rela rel;
10030
10031 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10032 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10033 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10034 loc += sizeof (Elf32_External_Rela);
10035
10036 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10037 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10038 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10039 loc += sizeof (Elf32_External_Rela);
10040
10041 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10042 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10043 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10044 loc += sizeof (Elf32_External_Rela);
10045 }
10046 }
10047 }
10048
10049 if (htab->glink != NULL
10050 && htab->glink->contents != NULL
10051 && htab->elf.dynamic_sections_created)
10052 {
10053 unsigned char *p;
10054 unsigned char *endp;
10055 bfd_vma res0;
10056 unsigned int i;
10057
10058 /*
10059 * PIC glink code is the following:
10060 *
10061 * # ith PLT code stub.
10062 * addis 11,30,(plt+(i-1)*4-got)@ha
10063 * lwz 11,(plt+(i-1)*4-got)@l(11)
10064 * mtctr 11
10065 * bctr
10066 *
10067 * # A table of branches, one for each plt entry.
10068 * # The idea is that the plt call stub loads ctr and r11 with these
10069 * # addresses, so (r11 - res_0) gives the plt index * 4.
10070 * res_0: b PLTresolve
10071 * res_1: b PLTresolve
10072 * .
10073 * # Some number of entries towards the end can be nops
10074 * res_n_m3: nop
10075 * res_n_m2: nop
10076 * res_n_m1:
10077 *
10078 * PLTresolve:
10079 * addis 11,11,(1f-res_0)@ha
10080 * mflr 0
10081 * bcl 20,31,1f
10082 * 1: addi 11,11,(1b-res_0)@l
10083 * mflr 12
10084 * mtlr 0
10085 * sub 11,11,12 # r11 = index * 4
10086 * addis 12,12,(got+4-1b)@ha
10087 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10088 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10089 * mtctr 0
10090 * add 0,11,11
10091 * add 11,0,11 # r11 = index * 12 = reloc offset.
10092 * bctr
10093 */
10094 static const unsigned int pic_plt_resolve[] =
10095 {
10096 ADDIS_11_11,
10097 MFLR_0,
10098 BCL_20_31,
10099 ADDI_11_11,
10100 MFLR_12,
10101 MTLR_0,
10102 SUB_11_11_12,
10103 ADDIS_12_12,
10104 LWZ_0_12,
10105 LWZ_12_12,
10106 MTCTR_0,
10107 ADD_0_11_11,
10108 ADD_11_0_11,
10109 BCTR,
10110 NOP,
10111 NOP
10112 };
10113
10114 /*
10115 * Non-PIC glink code is a little simpler.
10116 *
10117 * # ith PLT code stub.
10118 * lis 11,(plt+(i-1)*4)@ha
10119 * lwz 11,(plt+(i-1)*4)@l(11)
10120 * mtctr 11
10121 * bctr
10122 *
10123 * The branch table is the same, then comes
10124 *
10125 * PLTresolve:
10126 * lis 12,(got+4)@ha
10127 * addis 11,11,(-res_0)@ha
10128 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10129 * addi 11,11,(-res_0)@l # r11 = index * 4
10130 * mtctr 0
10131 * add 0,11,11
10132 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10133 * add 11,0,11 # r11 = index * 12 = reloc offset.
10134 * bctr
10135 */
10136 static const unsigned int plt_resolve[] =
10137 {
10138 LIS_12,
10139 ADDIS_11_11,
10140 LWZ_0_12,
10141 ADDI_11_11,
10142 MTCTR_0,
10143 ADD_0_11_11,
10144 LWZ_12_12,
10145 ADD_11_0_11,
10146 BCTR,
10147 NOP,
10148 NOP,
10149 NOP,
10150 NOP,
10151 NOP,
10152 NOP,
10153 NOP
10154 };
10155
10156 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10157 abort ();
10158 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10159 abort ();
10160
10161 /* Build the branch table, one for each plt entry (less one),
10162 and perhaps some padding. */
10163 p = htab->glink->contents;
10164 p += htab->glink_pltresolve;
10165 endp = htab->glink->contents;
10166 endp += htab->glink->size - GLINK_PLTRESOLVE;
10167 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10168 {
10169 bfd_put_32 (output_bfd, B + endp - p, p);
10170 p += 4;
10171 }
10172 while (p < endp)
10173 {
10174 bfd_put_32 (output_bfd, NOP, p);
10175 p += 4;
10176 }
10177
10178 res0 = (htab->glink_pltresolve
10179 + htab->glink->output_section->vma
10180 + htab->glink->output_offset);
10181
10182 if (htab->params->ppc476_workaround)
10183 {
10184 /* Ensure that a call stub at the end of a page doesn't
10185 result in prefetch over the end of the page into the
10186 glink branch table. */
10187 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10188 bfd_vma page_addr;
10189 bfd_vma glink_start = (htab->glink->output_section->vma
10190 + htab->glink->output_offset);
10191
10192 for (page_addr = res0 & -pagesize;
10193 page_addr > glink_start;
10194 page_addr -= pagesize)
10195 {
10196 /* We have a plt call stub that may need fixing. */
10197 bfd_byte *loc;
10198 unsigned int insn;
10199
10200 loc = htab->glink->contents + page_addr - 4 - glink_start;
10201 insn = bfd_get_32 (output_bfd, loc);
10202 if (insn == BCTR)
10203 {
10204 /* By alignment, we know that there must be at least
10205 one other call stub before this one. */
10206 insn = bfd_get_32 (output_bfd, loc - 16);
10207 if (insn == BCTR)
10208 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10209 else
10210 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10211 }
10212 }
10213 }
10214
10215 /* Last comes the PLTresolve stub. */
10216 if (info->shared)
10217 {
10218 bfd_vma bcl;
10219
10220 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10221 {
10222 unsigned int insn = pic_plt_resolve[i];
10223
10224 if (htab->params->ppc476_workaround && insn == NOP)
10225 insn = BA + 0;
10226 bfd_put_32 (output_bfd, insn, p);
10227 p += 4;
10228 }
10229 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10230
10231 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10232 + htab->glink->output_section->vma
10233 + htab->glink->output_offset);
10234
10235 bfd_put_32 (output_bfd,
10236 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10237 bfd_put_32 (output_bfd,
10238 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10239 bfd_put_32 (output_bfd,
10240 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10241 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10242 {
10243 bfd_put_32 (output_bfd,
10244 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10245 bfd_put_32 (output_bfd,
10246 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10247 }
10248 else
10249 {
10250 bfd_put_32 (output_bfd,
10251 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10252 bfd_put_32 (output_bfd,
10253 LWZ_12_12 + 4, p + 9*4);
10254 }
10255 }
10256 else
10257 {
10258 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10259 {
10260 unsigned int insn = plt_resolve[i];
10261
10262 if (htab->params->ppc476_workaround && insn == NOP)
10263 insn = BA + 0;
10264 bfd_put_32 (output_bfd, insn, p);
10265 p += 4;
10266 }
10267 p -= 4 * ARRAY_SIZE (plt_resolve);
10268
10269 bfd_put_32 (output_bfd,
10270 LIS_12 + PPC_HA (got + 4), p + 0*4);
10271 bfd_put_32 (output_bfd,
10272 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10273 bfd_put_32 (output_bfd,
10274 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10275 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10276 {
10277 bfd_put_32 (output_bfd,
10278 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10279 bfd_put_32 (output_bfd,
10280 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10281 }
10282 else
10283 {
10284 bfd_put_32 (output_bfd,
10285 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10286 bfd_put_32 (output_bfd,
10287 LWZ_12_12 + 4, p + 6*4);
10288 }
10289 }
10290 }
10291
10292 if (htab->glink_eh_frame != NULL
10293 && htab->glink_eh_frame->contents != NULL)
10294 {
10295 unsigned char *p = htab->glink_eh_frame->contents;
10296 bfd_vma val;
10297
10298 p += sizeof (glink_eh_frame_cie);
10299 /* FDE length. */
10300 p += 4;
10301 /* CIE pointer. */
10302 p += 4;
10303 /* Offset to .glink. */
10304 val = (htab->glink->output_section->vma
10305 + htab->glink->output_offset);
10306 val -= (htab->glink_eh_frame->output_section->vma
10307 + htab->glink_eh_frame->output_offset);
10308 val -= p - htab->glink_eh_frame->contents;
10309 bfd_put_32 (htab->elf.dynobj, val, p);
10310
10311 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10312 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10313 htab->glink_eh_frame,
10314 htab->glink_eh_frame->contents))
10315 return FALSE;
10316 }
10317
10318 return ret;
10319 }
10320
10321 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10322 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10323 #define TARGET_BIG_SYM powerpc_elf32_vec
10324 #define TARGET_BIG_NAME "elf32-powerpc"
10325 #define ELF_ARCH bfd_arch_powerpc
10326 #define ELF_TARGET_ID PPC32_ELF_DATA
10327 #define ELF_MACHINE_CODE EM_PPC
10328 #ifdef __QNXTARGET__
10329 #define ELF_MAXPAGESIZE 0x1000
10330 #else
10331 #define ELF_MAXPAGESIZE 0x10000
10332 #endif
10333 #define ELF_MINPAGESIZE 0x1000
10334 #define ELF_COMMONPAGESIZE 0x1000
10335 #define elf_info_to_howto ppc_elf_info_to_howto
10336
10337 #ifdef EM_CYGNUS_POWERPC
10338 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10339 #endif
10340
10341 #ifdef EM_PPC_OLD
10342 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10343 #endif
10344
10345 #define elf_backend_plt_not_loaded 1
10346 #define elf_backend_can_gc_sections 1
10347 #define elf_backend_can_refcount 1
10348 #define elf_backend_rela_normal 1
10349 #define elf_backend_caches_rawsize 1
10350
10351 #define bfd_elf32_mkobject ppc_elf_mkobject
10352 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10353 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10354 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10355 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10356 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10357 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10358 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10359
10360 #define elf_backend_object_p ppc_elf_object_p
10361 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10362 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10363 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10364 #define elf_backend_relocate_section ppc_elf_relocate_section
10365 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10366 #define elf_backend_check_relocs ppc_elf_check_relocs
10367 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10368 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10369 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10370 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10371 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10372 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10373 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10374 #define elf_backend_fake_sections ppc_elf_fake_sections
10375 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10376 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10377 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10378 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10379 #define elf_backend_write_core_note ppc_elf_write_core_note
10380 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10381 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10382 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10383 #define elf_backend_write_section ppc_elf_write_section
10384 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10385 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10386 #define elf_backend_action_discarded ppc_elf_action_discarded
10387 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10388 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10389 #define elf_backend_section_processing ppc_elf_section_processing
10390
10391 #include "elf32-target.h"
10392
10393 /* FreeBSD Target */
10394
10395 #undef TARGET_LITTLE_SYM
10396 #undef TARGET_LITTLE_NAME
10397
10398 #undef TARGET_BIG_SYM
10399 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10400 #undef TARGET_BIG_NAME
10401 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10402
10403 #undef ELF_OSABI
10404 #define ELF_OSABI ELFOSABI_FREEBSD
10405
10406 #undef elf32_bed
10407 #define elf32_bed elf32_powerpc_fbsd_bed
10408
10409 #include "elf32-target.h"
10410
10411 /* VxWorks Target */
10412
10413 #undef TARGET_LITTLE_SYM
10414 #undef TARGET_LITTLE_NAME
10415
10416 #undef TARGET_BIG_SYM
10417 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10418 #undef TARGET_BIG_NAME
10419 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10420
10421 #undef ELF_OSABI
10422
10423 /* VxWorks uses the elf default section flags for .plt. */
10424 static const struct bfd_elf_special_section *
ppc_elf_vxworks_get_sec_type_attr(bfd * abfd ATTRIBUTE_UNUSED,asection * sec)10425 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10426 {
10427 if (sec->name == NULL)
10428 return NULL;
10429
10430 if (strcmp (sec->name, ".plt") == 0)
10431 return _bfd_elf_get_sec_type_attr (abfd, sec);
10432
10433 return ppc_elf_get_sec_type_attr (abfd, sec);
10434 }
10435
10436 /* Like ppc_elf_link_hash_table_create, but overrides
10437 appropriately for VxWorks. */
10438 static struct bfd_link_hash_table *
ppc_elf_vxworks_link_hash_table_create(bfd * abfd)10439 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10440 {
10441 struct bfd_link_hash_table *ret;
10442
10443 ret = ppc_elf_link_hash_table_create (abfd);
10444 if (ret)
10445 {
10446 struct ppc_elf_link_hash_table *htab
10447 = (struct ppc_elf_link_hash_table *)ret;
10448 htab->is_vxworks = 1;
10449 htab->plt_type = PLT_VXWORKS;
10450 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10451 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10452 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10453 }
10454 return ret;
10455 }
10456
10457 /* Tweak magic VxWorks symbols as they are loaded. */
10458 static bfd_boolean
ppc_elf_vxworks_add_symbol_hook(bfd * abfd,struct bfd_link_info * info,Elf_Internal_Sym * sym,const char ** namep ATTRIBUTE_UNUSED,flagword * flagsp ATTRIBUTE_UNUSED,asection ** secp,bfd_vma * valp)10459 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10460 struct bfd_link_info *info,
10461 Elf_Internal_Sym *sym,
10462 const char **namep ATTRIBUTE_UNUSED,
10463 flagword *flagsp ATTRIBUTE_UNUSED,
10464 asection **secp,
10465 bfd_vma *valp)
10466 {
10467 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10468 valp))
10469 return FALSE;
10470
10471 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10472 }
10473
10474 static void
ppc_elf_vxworks_final_write_processing(bfd * abfd,bfd_boolean linker)10475 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10476 {
10477 ppc_elf_final_write_processing(abfd, linker);
10478 elf_vxworks_final_write_processing(abfd, linker);
10479 }
10480
10481 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10482 define it. */
10483 #undef elf_backend_want_plt_sym
10484 #define elf_backend_want_plt_sym 1
10485 #undef elf_backend_want_got_plt
10486 #define elf_backend_want_got_plt 1
10487 #undef elf_backend_got_symbol_offset
10488 #define elf_backend_got_symbol_offset 0
10489 #undef elf_backend_plt_not_loaded
10490 #define elf_backend_plt_not_loaded 0
10491 #undef elf_backend_plt_readonly
10492 #define elf_backend_plt_readonly 1
10493 #undef elf_backend_got_header_size
10494 #define elf_backend_got_header_size 12
10495
10496 #undef bfd_elf32_get_synthetic_symtab
10497
10498 #undef bfd_elf32_bfd_link_hash_table_create
10499 #define bfd_elf32_bfd_link_hash_table_create \
10500 ppc_elf_vxworks_link_hash_table_create
10501 #undef elf_backend_add_symbol_hook
10502 #define elf_backend_add_symbol_hook \
10503 ppc_elf_vxworks_add_symbol_hook
10504 #undef elf_backend_link_output_symbol_hook
10505 #define elf_backend_link_output_symbol_hook \
10506 elf_vxworks_link_output_symbol_hook
10507 #undef elf_backend_final_write_processing
10508 #define elf_backend_final_write_processing \
10509 ppc_elf_vxworks_final_write_processing
10510 #undef elf_backend_get_sec_type_attr
10511 #define elf_backend_get_sec_type_attr \
10512 ppc_elf_vxworks_get_sec_type_attr
10513 #undef elf_backend_emit_relocs
10514 #define elf_backend_emit_relocs \
10515 elf_vxworks_emit_relocs
10516
10517 #undef elf32_bed
10518 #define elf32_bed ppc_elf_vxworks_bed
10519 #undef elf_backend_post_process_headers
10520
10521 #include "elf32-target.h"
10522