1 /* BFD back-end for MIPS PE COFF files.
2 Copyright (C) 1990-2014 Free Software Foundation, Inc.
3 Modified from coff-i386.c by DJ Delorie, dj@cygnus.com
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 Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #define COFF_WITH_PE
23 /* pei-mips.c may have defined this to default off (0) before
24 including this file, so don't redefine if that's the case.
25 Otherwise we're generating objects, not executable images,
26 so we want to define it to default on. */
27 #ifndef COFF_LONG_SECTION_NAMES
28 #define COFF_LONG_SECTION_NAMES
29 #endif /* COFF_LONG_SECTION_NAMES */
30 #define PCRELOFFSET TRUE
31
32 #include "sysdep.h"
33 #include "bfd.h"
34 #include "libbfd.h"
35 #include "coff/mipspe.h"
36 #include "coff/internal.h"
37 #include "coff/pe.h"
38 #include "libcoff.h"
39
40 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 2
41 /* The page size is a guess based on ELF. */
42
43 #define COFF_PAGE_SIZE 0x1000
44
45 /* For some reason when using mips COFF the value stored in the .text
46 section for a reference to a common symbol is the value itself plus
47 any desired offset. Ian Taylor, Cygnus Support. */
48
49 /* If we are producing relocatable output, we need to do some
50 adjustments to the object file that are not done by the
51 bfd_perform_relocation function. This function is called by every
52 reloc type to make any required adjustments. */
53
54 static bfd_reloc_status_type
coff_mips_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section ATTRIBUTE_UNUSED,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)55 coff_mips_reloc (bfd *abfd,
56 arelent *reloc_entry,
57 asymbol *symbol,
58 void * data,
59 asection *input_section ATTRIBUTE_UNUSED,
60 bfd *output_bfd,
61 char **error_message ATTRIBUTE_UNUSED)
62 {
63 symvalue diff;
64
65 if (output_bfd == NULL)
66 return bfd_reloc_continue;
67
68 if (bfd_is_com_section (symbol->section))
69 {
70 #ifndef COFF_WITH_PE
71 /* We are relocating a common symbol. The current value in the
72 object file is ORIG + OFFSET, where ORIG is the value of the
73 common symbol as seen by the object file when it was compiled
74 (this may be zero if the symbol was undefined) and OFFSET is
75 the offset into the common symbol (normally zero, but may be
76 non-zero when referring to a field in a common structure).
77 ORIG is the negative of reloc_entry->addend, which is set by
78 the CALC_ADDEND macro below. We want to replace the value in
79 the object file with NEW + OFFSET, where NEW is the value of
80 the common symbol which we are going to put in the final
81 object file. NEW is symbol->value. */
82 diff = symbol->value + reloc_entry->addend;
83 #else
84 /* In PE mode, we do not offset the common symbol. */
85 diff = reloc_entry->addend;
86 #endif
87 }
88 else
89 /* For some reason bfd_perform_relocation always effectively
90 ignores the addend for a COFF target when producing
91 relocatable output. This seems to be always wrong for 386
92 COFF, so we handle the addend here instead. */
93 diff = reloc_entry->addend;
94
95 #define DOIT(x) \
96 x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + (diff >> howto->rightshift)) & howto->dst_mask))
97
98 if (diff != 0)
99 {
100 reloc_howto_type *howto = reloc_entry->howto;
101 unsigned char *addr = (unsigned char *) data + reloc_entry->address;
102
103 switch (howto->size)
104 {
105 case 0:
106 {
107 char x = bfd_get_8 (abfd, addr);
108
109 DOIT (x);
110 bfd_put_8 (abfd, x, addr);
111 }
112 break;
113
114 case 1:
115 {
116 short x = bfd_get_16 (abfd, addr);
117
118 DOIT (x);
119 bfd_put_16 (abfd, (bfd_vma) x, addr);
120 }
121 break;
122
123 case 2:
124 {
125 long x = bfd_get_32 (abfd, addr);
126
127 DOIT (x);
128 bfd_put_32 (abfd, (bfd_vma) x, addr);
129 }
130 break;
131
132 default:
133 abort ();
134 }
135 }
136
137 /* Now let bfd_perform_relocation finish everything up. */
138 return bfd_reloc_continue;
139 }
140
141 #ifdef COFF_WITH_PE
142 /* Return TRUE if this relocation should
143 appear in the output .reloc section. */
144
145 static bfd_boolean
in_reloc_p(bfd * abfd ATTRIBUTE_UNUSED,reloc_howto_type * howto)146 in_reloc_p (bfd * abfd ATTRIBUTE_UNUSED, reloc_howto_type *howto)
147 {
148 return ! howto->pc_relative && howto->type != MIPS_R_RVA;
149 }
150 #endif
151
152 #ifndef PCRELOFFSET
153 #define PCRELOFFSET FALSE
154 #endif
155
156 static reloc_howto_type howto_table[] =
157 {
158 /* Reloc type 0 is ignored. The reloc reading code ensures that
159 this is a reference to the .abs section, which will cause
160 bfd_perform_relocation to do nothing. */
161 HOWTO (MIPS_R_ABSOLUTE, /* Type. */
162 0, /* Rightshift. */
163 0, /* Size (0 = byte, 1 = short, 2 = long). */
164 8, /* Bitsize. */
165 FALSE, /* PC_relative. */
166 0, /* Bitpos. */
167 complain_overflow_dont, /* Complain_on_overflow. */
168 0, /* Special_function. */
169 "IGNORE", /* Name. */
170 FALSE, /* Partial_inplace. */
171 0, /* Src_mask. */
172 0, /* Dst_mask. */
173 FALSE), /* Pcrel_offset. */
174
175 /* A 16 bit reference to a symbol, normally from a data section. */
176 HOWTO (MIPS_R_REFHALF, /* Type. */
177 0, /* Rightshift. */
178 1, /* Size (0 = byte, 1 = short, 2 = long). */
179 16, /* Bitsize. */
180 FALSE, /* PC_relative. */
181 0, /* Bitpos. */
182 complain_overflow_bitfield, /* Complain_on_overflow. */
183 coff_mips_reloc, /* Special_function. */
184 "REFHALF", /* Name. */
185 TRUE, /* Partial_inplace. */
186 0xffff, /* Src_mask. */
187 0xffff, /* Dst_mask. */
188 FALSE), /* Pcrel_offset. */
189
190 /* A 32 bit reference to a symbol, normally from a data section. */
191 HOWTO (MIPS_R_REFWORD, /* Type. */
192 0, /* Rightshift. */
193 2, /* Size (0 = byte, 1 = short, 2 = long). */
194 32, /* Bitsize. */
195 FALSE, /* PC_relative. */
196 0, /* Bitpos. */
197 complain_overflow_bitfield, /* Complain_on_overflow. */
198 coff_mips_reloc, /* Special_function. */
199 "REFWORD", /* Name. */
200 TRUE, /* Partial_inplace. */
201 0xffffffff, /* Src_mask. */
202 0xffffffff, /* Dst_mask. */
203 FALSE), /* Pcrel_offset. */
204
205 /* A 26 bit absolute jump address. */
206 HOWTO (MIPS_R_JMPADDR, /* Type. */
207 2, /* Rightshift. */
208 2, /* Size (0 = byte, 1 = short, 2 = long). */
209 26, /* Bitsize. */
210 FALSE, /* PC_relative. */
211 0, /* Bitpos. */
212 complain_overflow_dont, /* Complain_on_overflow. */
213 /* This needs complex overflow
214 detection, because the upper four
215 bits must match the PC. */
216 coff_mips_reloc, /* Special_function. */
217 "JMPADDR", /* Name. */
218 TRUE, /* Partial_inplace. */
219 0x3ffffff, /* Src_mask. */
220 0x3ffffff, /* Dst_mask. */
221 FALSE), /* Pcrel_offset. */
222
223 /* The high 16 bits of a symbol value. Handled by the function
224 mips_refhi_reloc. */
225 HOWTO (MIPS_R_REFHI, /* Type. */
226 16, /* Rightshift. */
227 2, /* Size (0 = byte, 1 = short, 2 = long). */
228 16, /* Bitsize. */
229 FALSE, /* PC_relative. */
230 0, /* Bitpos. */
231 complain_overflow_bitfield, /* Complain_on_overflow. */
232 coff_mips_reloc, /* Special_function. */
233 "REFHI", /* Name. */
234 TRUE, /* Partial_inplace. */
235 0xffff, /* Src_mask. */
236 0xffff, /* Dst_mask. */
237 FALSE), /* Pcrel_offset. */
238
239 /* The low 16 bits of a symbol value. */
240 HOWTO (MIPS_R_REFLO, /* Type. */
241 0, /* Rightshift. */
242 2, /* Size (0 = byte, 1 = short, 2 = long). */
243 16, /* Bitsize. */
244 FALSE, /* PC_relative. */
245 0, /* Bitpos. */
246 complain_overflow_dont, /* Complain_on_overflow. */
247 coff_mips_reloc, /* Special_function. */
248 "REFLO", /* Name. */
249 TRUE, /* Partial_inplace. */
250 0xffff, /* Src_mask. */
251 0xffff, /* Dst_mask. */
252 FALSE), /* Pcrel_offset. */
253
254 /* A reference to an offset from the gp register. Handled by the
255 function mips_gprel_reloc. */
256 HOWTO (MIPS_R_GPREL, /* Type. */
257 0, /* Rightshift. */
258 2, /* Size (0 = byte, 1 = short, 2 = long). */
259 16, /* Bitsize. */
260 FALSE, /* PC_relative. */
261 0, /* Bitpos. */
262 complain_overflow_signed, /* Complain_on_overflow. */
263 coff_mips_reloc, /* Special_function. */
264 "GPREL", /* Name. */
265 TRUE, /* Partial_inplace. */
266 0xffff, /* Src_mask. */
267 0xffff, /* Dst_mask. */
268 FALSE), /* Pcrel_offset. */
269
270 /* A reference to a literal using an offset from the gp register.
271 Handled by the function mips_gprel_reloc. */
272 HOWTO (MIPS_R_LITERAL, /* Type. */
273 0, /* Rightshift. */
274 2, /* Size (0 = byte, 1 = short, 2 = long). */
275 16, /* Bitsize. */
276 FALSE, /* PC_relative. */
277 0, /* Bitpos. */
278 complain_overflow_signed, /* Complain_on_overflow. */
279 coff_mips_reloc, /* Special_function. */
280 "LITERAL", /* Name. */
281 TRUE, /* Partial_inplace. */
282 0xffff, /* Src_mask. */
283 0xffff, /* Dst_mask. */
284 FALSE), /* Pcrel_offset. */
285
286 EMPTY_HOWTO (8),
287 EMPTY_HOWTO (9),
288 EMPTY_HOWTO (10),
289 EMPTY_HOWTO (11),
290 EMPTY_HOWTO (12),
291 EMPTY_HOWTO (13),
292 EMPTY_HOWTO (14),
293 EMPTY_HOWTO (15),
294 EMPTY_HOWTO (16),
295 EMPTY_HOWTO (17),
296 EMPTY_HOWTO (18),
297 EMPTY_HOWTO (19),
298 EMPTY_HOWTO (20),
299 EMPTY_HOWTO (21),
300 EMPTY_HOWTO (22),
301 EMPTY_HOWTO (23),
302 EMPTY_HOWTO (24),
303 EMPTY_HOWTO (25),
304 EMPTY_HOWTO (26),
305 EMPTY_HOWTO (27),
306 EMPTY_HOWTO (28),
307 EMPTY_HOWTO (29),
308 EMPTY_HOWTO (30),
309 EMPTY_HOWTO (31),
310 EMPTY_HOWTO (32),
311 EMPTY_HOWTO (33),
312 HOWTO (MIPS_R_RVA, /* Type. */
313 0, /* Rightshift. */
314 2, /* Size (0 = byte, 1 = short, 2 = long). */
315 32, /* Bitsize. */
316 FALSE, /* PC_relative. */
317 0, /* Bitpos. */
318 complain_overflow_bitfield, /* Complain_on_overflow. */
319 coff_mips_reloc, /* Special_function. */
320 "rva32", /* Name. */
321 TRUE, /* Partial_inplace. */
322 0xffffffff, /* Src_mask. */
323 0xffffffff, /* Dst_mask. */
324 FALSE), /* Pcrel_offset. */
325 EMPTY_HOWTO (35),
326 EMPTY_HOWTO (36),
327 HOWTO (MIPS_R_PAIR, /* Type. */
328 0, /* Rightshift. */
329 2, /* Size (0 = byte, 1 = short, 2 = long). */
330 32, /* Bitsize. */
331 FALSE, /* PC_relative. */
332 0, /* Bitpos. */
333 complain_overflow_bitfield, /* Complain_on_overflow. */
334 coff_mips_reloc, /* Special_function. */
335 "PAIR", /* Name. */
336 TRUE, /* Partial_inplace. */
337 0xffffffff, /* Src_mask. */
338 0xffffffff, /* Dst_mask. */
339 FALSE), /* Pcrel_offset. */
340 };
341
342 #define NUM_HOWTOS (sizeof (howto_table) / sizeof (howto_table[0]))
343
344 /* Turn a howto into a reloc nunmber. */
345
346 #define SELECT_RELOC(x, howto) { x.r_type = howto->type; }
347 #define BADMAG(x) MIPSBADMAG (x)
348
349 /* Customize coffcode.h. */
350 #define MIPS 1
351
352 #define RTYPE2HOWTO(cache_ptr, dst) \
353 (cache_ptr)->howto = howto_table + (dst)->r_type;
354
355 /* Compute the addend of a reloc. If the reloc is to a common symbol,
356 the object file contains the value of the common symbol. By the
357 time this is called, the linker may be using a different symbol
358 from a different object file with a different value. Therefore, we
359 hack wildly to locate the original symbol from this file so that we
360 can make the correct adjustment. This macro sets coffsym to the
361 symbol from the original file, and uses it to set the addend value
362 correctly. If this is not a common symbol, the usual addend
363 calculation is done, except that an additional tweak is needed for
364 PC relative relocs.
365 FIXME: This macro refers to symbols and asect; these are from the
366 calling function, not the macro arguments. */
367
368 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
369 { \
370 coff_symbol_type *coffsym = NULL; \
371 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
372 coffsym = (obj_symbols (abfd) \
373 + (cache_ptr->sym_ptr_ptr - symbols)); \
374 else if (ptr) \
375 coffsym = coff_symbol_from (abfd, ptr); \
376 if (coffsym != NULL \
377 && coffsym->native->u.syment.n_scnum == 0) \
378 cache_ptr->addend = - coffsym->native->u.syment.n_value; \
379 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
380 && ptr->section != NULL) \
381 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
382 else \
383 cache_ptr->addend = 0; \
384 if (ptr && reloc.r_type < NUM_HOWTOS \
385 && howto_table[reloc.r_type].pc_relative) \
386 cache_ptr->addend += asect->vma; \
387 }
388
389 /* Convert an rtype to howto for the COFF backend linker. */
390
391 static reloc_howto_type *
coff_mips_rtype_to_howto(bfd * abfd ATTRIBUTE_UNUSED,asection * sec,struct internal_reloc * rel,struct coff_link_hash_entry * h,struct internal_syment * sym,bfd_vma * addendp)392 coff_mips_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
393 asection *sec,
394 struct internal_reloc *rel,
395 struct coff_link_hash_entry *h,
396 struct internal_syment *sym,
397 bfd_vma *addendp)
398 {
399
400 reloc_howto_type *howto;
401
402 howto = howto_table + rel->r_type;
403
404 #ifdef COFF_WITH_PE
405 *addendp = 0;
406 #endif
407
408 if (howto->pc_relative)
409 *addendp += sec->vma;
410
411 if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
412 {
413 /* This is a common symbol. The section contents include the
414 size (sym->n_value) as an addend. The relocate_section
415 function will be adding in the final value of the symbol. We
416 need to subtract out the current size in order to get the
417 correct result. */
418
419 BFD_ASSERT (h != NULL);
420
421 #ifndef COFF_WITH_PE
422 /* I think we *do* want to bypass this. If we don't, I have
423 seen some data parameters get the wrong relocation address.
424 If I link two versions with and without this section bypassed
425 and then do a binary comparison, the addresses which are
426 different can be looked up in the map. The case in which
427 this section has been bypassed has addresses which correspond
428 to values I can find in the map. */
429 *addendp -= sym->n_value;
430 #endif
431 }
432
433 #ifndef COFF_WITH_PE
434 /* If the output symbol is common (in which case this must be a
435 relocatable link), we need to add in the final size of the
436 common symbol. */
437 if (h != NULL && h->root.type == bfd_link_hash_common)
438 *addendp += h->root.u.c.size;
439 #endif
440
441 #ifdef COFF_WITH_PE
442 if (howto->pc_relative)
443 {
444 *addendp -= 4;
445
446 /* If the symbol is defined, then the generic code is going to
447 add back the symbol value in order to cancel out an
448 adjustment it made to the addend. However, we set the addend
449 to 0 at the start of this function. We need to adjust here,
450 to avoid the adjustment the generic code will make. FIXME:
451 This is getting a bit hackish. */
452 if (sym != NULL && sym->n_scnum != 0)
453 *addendp -= sym->n_value;
454 }
455
456 if (rel->r_type == MIPS_R_RVA)
457 *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase;
458 #endif
459
460 return howto;
461 }
462
463 #define coff_rtype_to_howto coff_mips_rtype_to_howto
464 #define coff_bfd_reloc_type_lookup coff_mips_reloc_type_lookup
465 #define coff_bfd_reloc_name_lookup coff_mips_reloc_name_lookup
466
467 /* Get the howto structure for a generic reloc type. */
468
469 static reloc_howto_type *
coff_mips_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)470 coff_mips_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
471 bfd_reloc_code_real_type code)
472 {
473 int mips_type;
474
475 switch (code)
476 {
477 case BFD_RELOC_16:
478 mips_type = MIPS_R_REFHALF;
479 break;
480 case BFD_RELOC_32:
481 case BFD_RELOC_CTOR:
482 mips_type = MIPS_R_REFWORD;
483 break;
484 case BFD_RELOC_MIPS_JMP:
485 mips_type = MIPS_R_JMPADDR;
486 break;
487 case BFD_RELOC_HI16_S:
488 mips_type = MIPS_R_REFHI;
489 break;
490 case BFD_RELOC_LO16:
491 mips_type = MIPS_R_REFLO;
492 break;
493 case BFD_RELOC_GPREL16:
494 mips_type = MIPS_R_GPREL;
495 break;
496 case BFD_RELOC_MIPS_LITERAL:
497 mips_type = MIPS_R_LITERAL;
498 break;
499 case BFD_RELOC_RVA:
500 mips_type = MIPS_R_RVA;
501 break;
502 default:
503 return NULL;
504 }
505
506 return & howto_table [mips_type];
507 }
508
509 static reloc_howto_type *
coff_mips_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)510 coff_mips_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
511 const char *r_name)
512 {
513 unsigned int i;
514
515 for (i = 0; i < NUM_HOWTOS; i++)
516 if (howto_table[i].name != NULL
517 && strcasecmp (howto_table[i].name, r_name) == 0)
518 return &howto_table[i];
519
520 return NULL;
521 }
522
523 static void
mips_swap_reloc_in(bfd * abfd,void * src,void * dst)524 mips_swap_reloc_in (bfd * abfd, void * src, void * dst)
525 {
526 static struct internal_reloc pair_prev;
527 RELOC *reloc_src = (RELOC *) src;
528 struct internal_reloc *reloc_dst = (struct internal_reloc *) dst;
529
530 reloc_dst->r_vaddr = H_GET_32 (abfd, reloc_src->r_vaddr);
531 reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx);
532 reloc_dst->r_type = H_GET_16 (abfd, reloc_src->r_type);
533 reloc_dst->r_size = 0;
534 reloc_dst->r_extern = 0;
535 reloc_dst->r_offset = 0;
536
537 switch (reloc_dst->r_type)
538 {
539 case MIPS_R_REFHI:
540 pair_prev = *reloc_dst;
541 break;
542 case MIPS_R_PAIR:
543 reloc_dst->r_offset = reloc_dst->r_symndx;
544 if (reloc_dst->r_offset & 0x8000)
545 reloc_dst->r_offset -= 0x10000;
546 reloc_dst->r_symndx = pair_prev.r_symndx;
547 break;
548 }
549 }
550
551 static unsigned int
mips_swap_reloc_out(bfd * abfd,void * src,void * dst)552 mips_swap_reloc_out (bfd * abfd, void * src, void * dst)
553 {
554 static bfd_vma prev_addr = 0;
555 struct internal_reloc *reloc_src = (struct internal_reloc *)src;
556 struct external_reloc *reloc_dst = (struct external_reloc *)dst;
557
558 switch (reloc_src->r_type)
559 {
560 case MIPS_R_REFHI:
561 prev_addr = reloc_src->r_vaddr;
562 break;
563 case MIPS_R_REFLO:
564 if (reloc_src->r_vaddr == prev_addr)
565 {
566 /* FIXME: only slightly hackish. If we see a REFLO pointing to
567 the same address as a REFHI, we assume this is the matching
568 PAIR reloc and output it accordingly. The symndx is really
569 the low 16 bits of the addend */
570 H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr);
571 H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx);
572 H_PUT_16 (abfd, MIPS_R_PAIR, reloc_dst->r_type);
573 return RELSZ;
574 }
575 break;
576 }
577
578 H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr);
579 H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx);
580
581 H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type);
582 return RELSZ;
583 }
584
585 #define coff_swap_reloc_in mips_swap_reloc_in
586 #define coff_swap_reloc_out mips_swap_reloc_out
587 #define NO_COFF_RELOCS
588
589 static bfd_boolean
coff_pe_mips_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,struct internal_reloc * relocs,struct internal_syment * syms,asection ** sections)590 coff_pe_mips_relocate_section (bfd *output_bfd,
591 struct bfd_link_info *info,
592 bfd *input_bfd,
593 asection *input_section,
594 bfd_byte *contents,
595 struct internal_reloc *relocs,
596 struct internal_syment *syms,
597 asection **sections)
598 {
599 struct internal_reloc *rel;
600 struct internal_reloc *rel_end;
601 unsigned int i;
602
603 if (info->relocatable)
604 {
605 (*_bfd_error_handler)
606 (_("%B: `ld -r' not supported with PE MIPS objects\n"), input_bfd);
607 bfd_set_error (bfd_error_bad_value);
608 return FALSE;
609 }
610
611 BFD_ASSERT (input_bfd->xvec->byteorder
612 == output_bfd->xvec->byteorder);
613
614 rel = relocs;
615 rel_end = rel + input_section->reloc_count;
616
617 for (i = 0; rel < rel_end; rel++, i++)
618 {
619 long symndx;
620 struct coff_link_hash_entry *h;
621 struct internal_syment *sym;
622 bfd_vma addend = 0;
623 bfd_vma val, tmp, targ, src, low;
624 reloc_howto_type *howto;
625 unsigned char *mem = contents + rel->r_vaddr;
626
627 symndx = rel->r_symndx;
628
629 if (symndx == -1)
630 {
631 h = NULL;
632 sym = NULL;
633 }
634 else
635 {
636 h = obj_coff_sym_hashes (input_bfd)[symndx];
637 sym = syms + symndx;
638 }
639
640 /* COFF treats common symbols in one of two ways. Either the
641 size of the symbol is included in the section contents, or it
642 is not. We assume that the size is not included, and force
643 the rtype_to_howto function to adjust the addend as needed. */
644
645 if (sym != NULL && sym->n_scnum != 0)
646 addend = - sym->n_value;
647 else
648 addend = 0;
649
650 howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h,
651 sym, &addend);
652 if (howto == NULL)
653 return FALSE;
654
655 /* If we are doing a relocatable link, then we can just ignore
656 a PC relative reloc that is pcrel_offset. It will already
657 have the correct value. If this is not a relocatable link,
658 then we should ignore the symbol value. */
659 if (howto->pc_relative && howto->pcrel_offset)
660 {
661 if (info->relocatable)
662 continue;
663 if (sym != NULL && sym->n_scnum != 0)
664 addend += sym->n_value;
665 }
666
667 val = 0;
668
669 if (h == NULL)
670 {
671 asection *sec;
672
673 if (symndx == -1)
674 {
675 sec = bfd_abs_section_ptr;
676 val = 0;
677 }
678 else
679 {
680 sec = sections[symndx];
681 val = (sec->output_section->vma
682 + sec->output_offset
683 + sym->n_value);
684 if (! obj_pe (input_bfd))
685 val -= sec->vma;
686 }
687 }
688 else
689 {
690 if (h->root.type == bfd_link_hash_defined
691 || h->root.type == bfd_link_hash_defweak)
692 {
693 asection *sec;
694
695 sec = h->root.u.def.section;
696 val = (h->root.u.def.value
697 + sec->output_section->vma
698 + sec->output_offset);
699 }
700
701 else if (! info->relocatable)
702 {
703 if (! ((*info->callbacks->undefined_symbol)
704 (info, h->root.root.string, input_bfd, input_section,
705 rel->r_vaddr - input_section->vma, TRUE)))
706 return FALSE;
707 }
708 }
709
710 src = rel->r_vaddr + input_section->output_section->vma
711 + input_section->output_offset;
712
713 /* OK, at this point the following variables are set up:
714 src = VMA of the memory we're fixing up
715 mem = pointer to memory we're fixing up
716 val = VMA of what we need to refer to. */
717
718 #define UI(x) (*_bfd_error_handler) (_("%B: unimplemented %s\n"), \
719 input_bfd, x); \
720 bfd_set_error (bfd_error_bad_value);
721
722 switch (rel->r_type)
723 {
724 case MIPS_R_ABSOLUTE:
725 /* Ignore these. */
726 break;
727
728 case MIPS_R_REFHALF:
729 UI ("refhalf");
730 break;
731
732 case MIPS_R_REFWORD:
733 tmp = bfd_get_32 (input_bfd, mem);
734 /* printf ("refword: src=%08x targ=%08x+%08x\n", src, tmp, val); */
735 tmp += val;
736 bfd_put_32 (input_bfd, tmp, mem);
737 break;
738
739 case MIPS_R_JMPADDR:
740 tmp = bfd_get_32 (input_bfd, mem);
741 targ = val + (tmp & 0x03ffffff) * 4;
742 if ((src & 0xf0000000) != (targ & 0xf0000000))
743 {
744 (*_bfd_error_handler) (_("%B: jump too far away\n"), input_bfd);
745 bfd_set_error (bfd_error_bad_value);
746 return FALSE;
747 }
748 tmp &= 0xfc000000;
749 tmp |= (targ / 4) & 0x3ffffff;
750 bfd_put_32 (input_bfd, tmp, mem);
751 break;
752
753 case MIPS_R_REFHI:
754 tmp = bfd_get_32 (input_bfd, mem);
755 switch (rel[1].r_type)
756 {
757 case MIPS_R_PAIR:
758 /* MS PE object */
759 targ = val + rel[1].r_offset + ((tmp & 0xffff) << 16);
760 break;
761 case MIPS_R_REFLO:
762 /* GNU COFF object */
763 low = bfd_get_32 (input_bfd, contents + rel[1].r_vaddr);
764 low &= 0xffff;
765 if (low & 0x8000)
766 low -= 0x10000;
767 targ = val + low + ((tmp & 0xffff) << 16);
768 break;
769 default:
770 (*_bfd_error_handler) (_("%B: bad pair/reflo after refhi\n"),
771 input_bfd);
772 bfd_set_error (bfd_error_bad_value);
773 return FALSE;
774 }
775 tmp &= 0xffff0000;
776 tmp |= (targ >> 16) & 0xffff;
777 bfd_put_32 (input_bfd, tmp, mem);
778 break;
779
780 case MIPS_R_REFLO:
781 tmp = bfd_get_32 (input_bfd, mem);
782 targ = val + (tmp & 0xffff);
783 /* printf ("refword: src=%08x targ=%08x\n", src, targ); */
784 tmp &= 0xffff0000;
785 tmp |= targ & 0xffff;
786 bfd_put_32 (input_bfd, tmp, mem);
787 break;
788
789 case MIPS_R_GPREL:
790 case MIPS_R_LITERAL:
791 UI ("gprel");
792 break;
793
794 case MIPS_R_SECTION:
795 UI ("section");
796 break;
797
798 case MIPS_R_SECREL:
799 UI ("secrel");
800 break;
801
802 case MIPS_R_SECRELLO:
803 UI ("secrello");
804 break;
805
806 case MIPS_R_SECRELHI:
807 UI ("secrelhi");
808 break;
809
810 case MIPS_R_RVA:
811 tmp = bfd_get_32 (input_bfd, mem);
812 /* printf ("rva: src=%08x targ=%08x+%08x\n", src, tmp, val); */
813 tmp += val
814 - pe_data (input_section->output_section->owner)->pe_opthdr.ImageBase;
815 bfd_put_32 (input_bfd, tmp, mem);
816 break;
817
818 case MIPS_R_PAIR:
819 /* ignore these */
820 break;
821 }
822 }
823
824 return TRUE;
825 }
826
827 #define coff_relocate_section coff_pe_mips_relocate_section
828
829 #ifdef TARGET_UNDERSCORE
830
831 /* If mips gcc uses underscores for symbol names, then it does not use
832 a leading dot for local labels, so if TARGET_UNDERSCORE is defined
833 we treat all symbols starting with L as local. */
834
835 static bfd_boolean
coff_mips_is_local_label_name(bfd * abfd,const char * name)836 coff_mips_is_local_label_name (bfd *abfd, const char *name)
837 {
838 if (name[0] == 'L')
839 return TRUE;
840
841 return _bfd_coff_is_local_label_name (abfd, name);
842 }
843
844 #define coff_bfd_is_local_label_name coff_mips_is_local_label_name
845
846 #endif /* TARGET_UNDERSCORE */
847
848 #define COFF_NO_HACK_SCNHDR_SIZE
849
850 #ifndef bfd_pe_print_pdata
851 #define bfd_pe_print_pdata NULL
852 #endif
853
854 #include "coffcode.h"
855
856 const bfd_target
857 #ifdef TARGET_SYM
858 TARGET_SYM =
859 #else
860 mips_pe_le_vec =
861 #endif
862 {
863 #ifdef TARGET_NAME
864 TARGET_NAME,
865 #else
866 "pe-mips", /* Name. */
867 #endif
868 bfd_target_coff_flavour,
869 BFD_ENDIAN_LITTLE, /* Data byte order is little. */
870 BFD_ENDIAN_LITTLE, /* Header byte order is little. */
871
872 (HAS_RELOC | EXEC_P | /* Object flags. */
873 HAS_LINENO | HAS_DEBUG |
874 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
875
876 #ifndef COFF_WITH_PE
877 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */
878 | SEC_CODE | SEC_DATA),
879 #else
880 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */
881 | SEC_CODE | SEC_DATA
882 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES),
883 #endif
884
885 #ifdef TARGET_UNDERSCORE
886 TARGET_UNDERSCORE, /* Leading underscore. */
887 #else
888 0, /* leading underscore */
889 #endif
890 '/', /* AR_pad_char. */
891 15, /* AR_max_namelen. */
892 0, /* match priority. */
893
894 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
895 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
896 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */
897 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
898 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
899 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Headers. */
900
901 /* Note that we allow an object file to be treated as a core file as well. */
902 {_bfd_dummy_target, coff_object_p, /* bfd_check_format. */
903 bfd_generic_archive_p, coff_object_p},
904 {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format. */
905 bfd_false},
906 {bfd_false, coff_write_object_contents, /* bfd_write_contents. */
907 _bfd_write_archive_contents, bfd_false},
908
909 BFD_JUMP_TABLE_GENERIC (coff),
910 BFD_JUMP_TABLE_COPY (coff),
911 BFD_JUMP_TABLE_CORE (_bfd_nocore),
912 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
913 BFD_JUMP_TABLE_SYMBOLS (coff),
914 BFD_JUMP_TABLE_RELOCS (coff),
915 BFD_JUMP_TABLE_WRITE (coff),
916 BFD_JUMP_TABLE_LINK (coff),
917 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
918
919 NULL,
920
921 COFF_SWAP_TABLE
922 };
923