1 /* VAX series support for 32-bit ELF
2 Copyright (C) 1993-2014 Free Software Foundation, Inc.
3 Contributed by Matt Thomas <matt@3am-software.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 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/vax.h"
28
29 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
30 static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
31 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
32 struct bfd_hash_table *,
33 const char *);
34 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
35 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
36 asection *, const Elf_Internal_Rela *);
37 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
38 struct elf_link_hash_entry *);
39 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
40 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
41 bfd *, asection *, bfd_byte *,
42 Elf_Internal_Rela *,
43 Elf_Internal_Sym *, asection **);
44 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
45 struct elf_link_hash_entry *,
46 Elf_Internal_Sym *);
47 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
48 struct bfd_link_info *);
49 static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *,
50 const arelent *);
51
52 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
53 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
54 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, void *);
55
56 static reloc_howto_type howto_table[] = {
57 HOWTO (R_VAX_NONE, /* type */
58 0, /* rightshift */
59 0, /* size (0 = byte, 1 = short, 2 = long) */
60 0, /* bitsize */
61 FALSE, /* pc_relative */
62 0, /* bitpos */
63 complain_overflow_dont, /* complain_on_overflow */
64 bfd_elf_generic_reloc, /* special_function */
65 "R_VAX_NONE", /* name */
66 FALSE, /* partial_inplace */
67 0, /* src_mask */
68 0x00000000, /* dst_mask */
69 FALSE), /* pcrel_offset */
70
71 HOWTO (R_VAX_32, /* type */
72 0, /* rightshift */
73 2, /* size (0 = byte, 1 = short, 2 = long) */
74 32, /* bitsize */
75 FALSE, /* pc_relative */
76 0, /* bitpos */
77 complain_overflow_bitfield, /* complain_on_overflow */
78 bfd_elf_generic_reloc, /* special_function */
79 "R_VAX_32", /* name */
80 FALSE, /* partial_inplace */
81 0, /* src_mask */
82 0xffffffff, /* dst_mask */
83 FALSE), /* pcrel_offset */
84
85 HOWTO (R_VAX_16, /* type */
86 0, /* rightshift */
87 1, /* size (0 = byte, 1 = short, 2 = long) */
88 16, /* bitsize */
89 FALSE, /* pc_relative */
90 0, /* bitpos */
91 complain_overflow_bitfield, /* complain_on_overflow */
92 bfd_elf_generic_reloc, /* special_function */
93 "R_VAX_16", /* name */
94 FALSE, /* partial_inplace */
95 0, /* src_mask */
96 0x0000ffff, /* dst_mask */
97 FALSE), /* pcrel_offset */
98
99 HOWTO (R_VAX_8, /* type */
100 0, /* rightshift */
101 0, /* size (0 = byte, 1 = short, 2 = long) */
102 8, /* bitsize */
103 FALSE, /* pc_relative */
104 0, /* bitpos */
105 complain_overflow_bitfield, /* complain_on_overflow */
106 bfd_elf_generic_reloc, /* special_function */
107 "R_VAX_8", /* name */
108 FALSE, /* partial_inplace */
109 0, /* src_mask */
110 0x000000ff, /* dst_mask */
111 FALSE), /* pcrel_offset */
112
113 HOWTO (R_VAX_PC32, /* type */
114 0, /* rightshift */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
116 32, /* bitsize */
117 TRUE, /* pc_relative */
118 0, /* bitpos */
119 complain_overflow_bitfield, /* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_VAX_PC32", /* name */
122 FALSE, /* partial_inplace */
123 0, /* src_mask */
124 0xffffffff, /* dst_mask */
125 TRUE), /* pcrel_offset */
126
127 HOWTO (R_VAX_PC16, /* type */
128 0, /* rightshift */
129 1, /* size (0 = byte, 1 = short, 2 = long) */
130 16, /* bitsize */
131 TRUE, /* pc_relative */
132 0, /* bitpos */
133 complain_overflow_signed, /* complain_on_overflow */
134 bfd_elf_generic_reloc, /* special_function */
135 "R_VAX_PC16", /* name */
136 FALSE, /* partial_inplace */
137 0, /* src_mask */
138 0x0000ffff, /* dst_mask */
139 TRUE), /* pcrel_offset */
140
141 HOWTO (R_VAX_PC8, /* type */
142 0, /* rightshift */
143 0, /* size (0 = byte, 1 = short, 2 = long) */
144 8, /* bitsize */
145 TRUE, /* pc_relative */
146 0, /* bitpos */
147 complain_overflow_signed, /* complain_on_overflow */
148 bfd_elf_generic_reloc, /* special_function */
149 "R_VAX_PC8", /* name */
150 FALSE, /* partial_inplace */
151 0, /* src_mask */
152 0x000000ff, /* dst_mask */
153 TRUE), /* pcrel_offset */
154
155 HOWTO (R_VAX_GOT32, /* type */
156 0, /* rightshift */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
158 32, /* bitsize */
159 TRUE, /* pc_relative */
160 0, /* bitpos */
161 complain_overflow_bitfield, /* complain_on_overflow */
162 bfd_elf_generic_reloc, /* special_function */
163 "R_VAX_GOT32", /* name */
164 FALSE, /* partial_inplace */
165 0, /* src_mask */
166 0xffffffff, /* dst_mask */
167 TRUE), /* pcrel_offset */
168
169 EMPTY_HOWTO (-1),
170 EMPTY_HOWTO (-1),
171 EMPTY_HOWTO (-1),
172 EMPTY_HOWTO (-1),
173 EMPTY_HOWTO (-1),
174
175 HOWTO (R_VAX_PLT32, /* type */
176 0, /* rightshift */
177 2, /* size (0 = byte, 1 = short, 2 = long) */
178 32, /* bitsize */
179 TRUE, /* pc_relative */
180 0, /* bitpos */
181 complain_overflow_bitfield, /* complain_on_overflow */
182 bfd_elf_generic_reloc, /* special_function */
183 "R_VAX_PLT32", /* name */
184 FALSE, /* partial_inplace */
185 0, /* src_mask */
186 0xffffffff, /* dst_mask */
187 TRUE), /* pcrel_offset */
188
189 EMPTY_HOWTO (-1),
190 EMPTY_HOWTO (-1),
191 EMPTY_HOWTO (-1),
192 EMPTY_HOWTO (-1),
193 EMPTY_HOWTO (-1),
194
195 HOWTO (R_VAX_COPY, /* type */
196 0, /* rightshift */
197 0, /* size (0 = byte, 1 = short, 2 = long) */
198 0, /* bitsize */
199 FALSE, /* pc_relative */
200 0, /* bitpos */
201 complain_overflow_dont, /* complain_on_overflow */
202 bfd_elf_generic_reloc, /* special_function */
203 "R_VAX_COPY", /* name */
204 FALSE, /* partial_inplace */
205 0, /* src_mask */
206 0xffffffff, /* dst_mask */
207 FALSE), /* pcrel_offset */
208
209 HOWTO (R_VAX_GLOB_DAT, /* type */
210 0, /* rightshift */
211 2, /* size (0 = byte, 1 = short, 2 = long) */
212 32, /* bitsize */
213 FALSE, /* pc_relative */
214 0, /* bitpos */
215 complain_overflow_dont, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_VAX_GLOB_DAT", /* name */
218 FALSE, /* partial_inplace */
219 0, /* src_mask */
220 0xffffffff, /* dst_mask */
221 FALSE), /* pcrel_offset */
222
223 HOWTO (R_VAX_JMP_SLOT, /* type */
224 0, /* rightshift */
225 2, /* size (0 = byte, 1 = short, 2 = long) */
226 32, /* bitsize */
227 FALSE, /* pc_relative */
228 0, /* bitpos */
229 complain_overflow_dont, /* complain_on_overflow */
230 bfd_elf_generic_reloc, /* special_function */
231 "R_VAX_JMP_SLOT", /* name */
232 FALSE, /* partial_inplace */
233 0, /* src_mask */
234 0xffffffff, /* dst_mask */
235 FALSE), /* pcrel_offset */
236
237 HOWTO (R_VAX_RELATIVE, /* type */
238 0, /* rightshift */
239 2, /* size (0 = byte, 1 = short, 2 = long) */
240 32, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_dont, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_VAX_RELATIVE", /* name */
246 FALSE, /* partial_inplace */
247 0, /* src_mask */
248 0xffffffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* GNU extension to record C++ vtable hierarchy */
252 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
253 0, /* rightshift */
254 2, /* size (0 = byte, 1 = short, 2 = long) */
255 0, /* bitsize */
256 FALSE, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_dont, /* complain_on_overflow */
259 NULL, /* special_function */
260 "R_VAX_GNU_VTINHERIT", /* name */
261 FALSE, /* partial_inplace */
262 0, /* src_mask */
263 0, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 /* GNU extension to record C++ vtable member usage */
267 HOWTO (R_VAX_GNU_VTENTRY, /* type */
268 0, /* rightshift */
269 2, /* size (0 = byte, 1 = short, 2 = long) */
270 0, /* bitsize */
271 FALSE, /* pc_relative */
272 0, /* bitpos */
273 complain_overflow_dont, /* complain_on_overflow */
274 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
275 "R_VAX_GNU_VTENTRY", /* name */
276 FALSE, /* partial_inplace */
277 0, /* src_mask */
278 0, /* dst_mask */
279 FALSE), /* pcrel_offset */
280 };
281
282 static void
rtype_to_howto(bfd * abfd ATTRIBUTE_UNUSED,arelent * cache_ptr,Elf_Internal_Rela * dst)283 rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
284 Elf_Internal_Rela *dst)
285 {
286 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
287 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
288 }
289
290 #define elf_info_to_howto rtype_to_howto
291
292 static const struct
293 {
294 bfd_reloc_code_real_type bfd_val;
295 int elf_val;
296 } reloc_map[] = {
297 { BFD_RELOC_NONE, R_VAX_NONE },
298 { BFD_RELOC_32, R_VAX_32 },
299 { BFD_RELOC_16, R_VAX_16 },
300 { BFD_RELOC_8, R_VAX_8 },
301 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
302 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
303 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
304 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
305 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
306 { BFD_RELOC_NONE, R_VAX_COPY },
307 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
308 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
309 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
310 { BFD_RELOC_CTOR, R_VAX_32 },
311 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
312 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
313 };
314
315 static reloc_howto_type *
reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)316 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
317 {
318 unsigned int i;
319 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
320 {
321 if (reloc_map[i].bfd_val == code)
322 return &howto_table[reloc_map[i].elf_val];
323 }
324 return 0;
325 }
326
327 static reloc_howto_type *
reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)328 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
329 const char *r_name)
330 {
331 unsigned int i;
332
333 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
334 if (howto_table[i].name != NULL
335 && strcasecmp (howto_table[i].name, r_name) == 0)
336 return &howto_table[i];
337
338 return NULL;
339 }
340
341 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
342 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
343 #define ELF_ARCH bfd_arch_vax
344 /* end code generated by elf.el */
345
346 /* Functions for the VAX ELF linker. */
347
348 /* The name of the dynamic interpreter. This is put in the .interp
349 section. */
350
351 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
352
353 /* The size in bytes of an entry in the procedure linkage table. */
354
355 #define PLT_ENTRY_SIZE 12
356
357 /* The first entry in a procedure linkage table looks like this. See
358 the SVR4 ABI VAX supplement to see how this works. */
359
360 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
361 {
362 0xdd, 0xef, /* pushl l^ */
363 0, 0, 0, 0, /* offset to .plt.got + 4 */
364 0x17, 0xff, /* jmp @L^(pc) */
365 0, 0, 0, 0, /* offset to .plt.got + 8 */
366 };
367
368 /* Subsequent entries in a procedure linkage table look like this. */
369
370 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
371 {
372 0xfc, 0x0f, /* .word ^M<r11:r2> */
373 0x16, 0xef, /* jsb L^(pc) */
374 0, 0, 0, 0, /* replaced with offset to start of .plt */
375 0, 0, 0, 0, /* index into .rela.plt */
376 };
377
378 /* The VAX linker needs to keep track of the number of relocs that it
379 decides to copy in check_relocs for each symbol. This is so that it
380 can discard PC relative relocs if it doesn't need them when linking
381 with -Bsymbolic. We store the information in a field extending the
382 regular ELF linker hash table. */
383
384 /* This structure keeps track of the number of PC relative relocs we have
385 copied for a given symbol. */
386
387 struct elf_vax_pcrel_relocs_copied
388 {
389 /* Next section. */
390 struct elf_vax_pcrel_relocs_copied *next;
391 /* A section in dynobj. */
392 asection *section;
393 /* Number of relocs copied in this section. */
394 bfd_size_type count;
395 };
396
397 /* VAX ELF linker hash entry. */
398
399 struct elf_vax_link_hash_entry
400 {
401 struct elf_link_hash_entry root;
402
403 /* Number of PC relative relocs copied for this symbol. */
404 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
405
406 bfd_vma got_addend;
407 };
408
409 /* Declare this now that the above structures are defined. */
410
411 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
412 void *);
413
414 /* Declare this now that the above structures are defined. */
415
416 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
417 void *);
418
419 /* Traverse an VAX ELF linker hash table. */
420
421 #define elf_vax_link_hash_traverse(table, func, info) \
422 (elf_link_hash_traverse \
423 ((table), \
424 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
425 (info)))
426
427 /* Create an entry in an VAX ELF linker hash table. */
428
429 static struct bfd_hash_entry *
elf_vax_link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)430 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
431 struct bfd_hash_table *table,
432 const char *string)
433 {
434 struct elf_vax_link_hash_entry *ret =
435 (struct elf_vax_link_hash_entry *) entry;
436
437 /* Allocate the structure if it has not already been allocated by a
438 subclass. */
439 if (ret == NULL)
440 ret = ((struct elf_vax_link_hash_entry *)
441 bfd_hash_allocate (table,
442 sizeof (struct elf_vax_link_hash_entry)));
443 if (ret == NULL)
444 return (struct bfd_hash_entry *) ret;
445
446 /* Call the allocation method of the superclass. */
447 ret = ((struct elf_vax_link_hash_entry *)
448 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
449 table, string));
450 if (ret != NULL)
451 {
452 ret->pcrel_relocs_copied = NULL;
453 }
454
455 return (struct bfd_hash_entry *) ret;
456 }
457
458 /* Create an VAX ELF linker hash table. */
459
460 static struct bfd_link_hash_table *
elf_vax_link_hash_table_create(bfd * abfd)461 elf_vax_link_hash_table_create (bfd *abfd)
462 {
463 struct elf_link_hash_table *ret;
464 bfd_size_type amt = sizeof (struct elf_link_hash_table);
465
466 ret = bfd_zmalloc (amt);
467 if (ret == NULL)
468 return NULL;
469
470 if (!_bfd_elf_link_hash_table_init (ret, abfd,
471 elf_vax_link_hash_newfunc,
472 sizeof (struct elf_vax_link_hash_entry),
473 GENERIC_ELF_DATA))
474 {
475 free (ret);
476 return NULL;
477 }
478
479 return &ret->root;
480 }
481
482 /* Keep vax-specific flags in the ELF header */
483 static bfd_boolean
elf32_vax_set_private_flags(bfd * abfd,flagword flags)484 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
485 {
486 elf_elfheader (abfd)->e_flags = flags;
487 elf_flags_init (abfd) = TRUE;
488 return TRUE;
489 }
490
491 /* Merge backend specific data from an object file to the output
492 object file when linking. */
493 static bfd_boolean
elf32_vax_merge_private_bfd_data(bfd * ibfd,bfd * obfd)494 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
495 {
496 flagword in_flags;
497
498 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
499 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
500 return TRUE;
501
502 in_flags = elf_elfheader (ibfd)->e_flags;
503
504 if (!elf_flags_init (obfd))
505 {
506 elf_flags_init (obfd) = TRUE;
507 elf_elfheader (obfd)->e_flags = in_flags;
508 }
509
510 return TRUE;
511 }
512
513 /* Display the flags field */
514 static bfd_boolean
elf32_vax_print_private_bfd_data(bfd * abfd,void * ptr)515 elf32_vax_print_private_bfd_data (bfd *abfd, void * ptr)
516 {
517 FILE *file = (FILE *) ptr;
518
519 BFD_ASSERT (abfd != NULL && ptr != NULL);
520
521 /* Print normal ELF private data. */
522 _bfd_elf_print_private_bfd_data (abfd, ptr);
523
524 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
525
526 /* xgettext:c-format */
527 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
528
529 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
530 fprintf (file, _(" [nonpic]"));
531
532 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
533 fprintf (file, _(" [d-float]"));
534
535 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
536 fprintf (file, _(" [g-float]"));
537
538 fputc ('\n', file);
539
540 return TRUE;
541 }
542 /* Look through the relocs for a section during the first phase, and
543 allocate space in the global offset table or procedure linkage
544 table. */
545
546 static bfd_boolean
elf_vax_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)547 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
548 const Elf_Internal_Rela *relocs)
549 {
550 bfd *dynobj;
551 Elf_Internal_Shdr *symtab_hdr;
552 struct elf_link_hash_entry **sym_hashes;
553 const Elf_Internal_Rela *rel;
554 const Elf_Internal_Rela *rel_end;
555 asection *sgot;
556 asection *srelgot;
557 asection *sreloc;
558
559 if (info->relocatable)
560 return TRUE;
561
562 dynobj = elf_hash_table (info)->dynobj;
563 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
564 sym_hashes = elf_sym_hashes (abfd);
565
566 sgot = NULL;
567 srelgot = NULL;
568 sreloc = NULL;
569
570 rel_end = relocs + sec->reloc_count;
571 for (rel = relocs; rel < rel_end; rel++)
572 {
573 unsigned long r_symndx;
574 struct elf_link_hash_entry *h;
575
576 r_symndx = ELF32_R_SYM (rel->r_info);
577
578 if (r_symndx < symtab_hdr->sh_info)
579 h = NULL;
580 else
581 {
582 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
583 while (h->root.type == bfd_link_hash_indirect
584 || h->root.type == bfd_link_hash_warning)
585 h = (struct elf_link_hash_entry *) h->root.u.i.link;
586
587 /* PR15323, ref flags aren't set for references in the same
588 object. */
589 h->root.non_ir_ref = 1;
590 }
591
592 switch (ELF32_R_TYPE (rel->r_info))
593 {
594 case R_VAX_GOT32:
595 BFD_ASSERT (h != NULL);
596
597 /* If this is a local symbol, we resolve it directly without
598 creating a global offset table entry. */
599 if (h->forced_local
600 || h == elf_hash_table (info)->hgot
601 || h == elf_hash_table (info)->hplt)
602 break;
603
604 /* This symbol requires a global offset table entry. */
605
606 if (dynobj == NULL)
607 {
608 /* Create the .got section. */
609 elf_hash_table (info)->dynobj = dynobj = abfd;
610 if (!_bfd_elf_create_got_section (dynobj, info))
611 return FALSE;
612 }
613
614 if (sgot == NULL)
615 {
616 sgot = bfd_get_linker_section (dynobj, ".got");
617 BFD_ASSERT (sgot != NULL);
618 }
619
620 if (srelgot == NULL
621 && (h != NULL || info->shared))
622 {
623 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
624 if (srelgot == NULL)
625 {
626 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
627 | SEC_IN_MEMORY | SEC_LINKER_CREATED
628 | SEC_READONLY);
629
630 srelgot = bfd_make_section_anyway_with_flags (dynobj,
631 ".rela.got",
632 flags);
633 if (srelgot == NULL
634 || !bfd_set_section_alignment (dynobj, srelgot, 2))
635 return FALSE;
636 }
637 }
638
639 if (h != NULL)
640 {
641 struct elf_vax_link_hash_entry *eh;
642
643 eh = (struct elf_vax_link_hash_entry *) h;
644 if (h->got.refcount == -1)
645 {
646 h->got.refcount = 1;
647 eh->got_addend = rel->r_addend;
648 }
649 else
650 {
651 h->got.refcount++;
652 if (eh->got_addend != (bfd_vma) rel->r_addend)
653 (*_bfd_error_handler)
654 (_("%s: warning: GOT addend of %ld to `%s' does"
655 " not match previous GOT addend of %ld"),
656 bfd_get_filename (abfd), rel->r_addend,
657 h->root.root.string,
658 eh->got_addend);
659
660 }
661 }
662 break;
663
664 case R_VAX_PLT32:
665 /* This symbol requires a procedure linkage table entry. We
666 actually build the entry in adjust_dynamic_symbol,
667 because this might be a case of linking PIC code which is
668 never referenced by a dynamic object, in which case we
669 don't need to generate a procedure linkage table entry
670 after all. */
671 BFD_ASSERT (h != NULL);
672
673 /* If this is a local symbol, we resolve it directly without
674 creating a procedure linkage table entry. */
675 if (h->forced_local)
676 break;
677
678 h->needs_plt = 1;
679 if (h->plt.refcount == -1)
680 h->plt.refcount = 1;
681 else
682 h->plt.refcount++;
683 break;
684
685 case R_VAX_PC8:
686 case R_VAX_PC16:
687 case R_VAX_PC32:
688 /* If we are creating a shared library and this is not a local
689 symbol, we need to copy the reloc into the shared library.
690 However when linking with -Bsymbolic and this is a global
691 symbol which is defined in an object we are including in the
692 link (i.e., DEF_REGULAR is set), then we can resolve the
693 reloc directly. At this point we have not seen all the input
694 files, so it is possible that DEF_REGULAR is not set now but
695 will be set later (it is never cleared). We account for that
696 possibility below by storing information in the
697 pcrel_relocs_copied field of the hash table entry. */
698 if (!(info->shared
699 && (sec->flags & SEC_ALLOC) != 0
700 && h != NULL
701 && (!info->symbolic
702 || !h->def_regular)))
703 {
704 if (h != NULL
705 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
706 && !h->forced_local)
707 {
708 /* Make sure a plt entry is created for this symbol if
709 it turns out to be a function defined by a dynamic
710 object. */
711 if (h->plt.refcount == -1)
712 h->plt.refcount = 1;
713 else
714 h->plt.refcount++;
715 }
716 break;
717 }
718 /* If this is a local symbol, we can resolve it directly. */
719 if (h != NULL
720 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
721 || h->forced_local))
722 break;
723
724 /* Fall through. */
725 case R_VAX_8:
726 case R_VAX_16:
727 case R_VAX_32:
728 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
729 {
730 /* Make sure a plt entry is created for this symbol if it
731 turns out to be a function defined by a dynamic object. */
732 if (h->plt.refcount == -1)
733 h->plt.refcount = 1;
734 else
735 h->plt.refcount++;
736 }
737
738 /* If we are creating a shared library, we need to copy the
739 reloc into the shared library. */
740 if (info->shared
741 && (sec->flags & SEC_ALLOC) != 0)
742 {
743 /* When creating a shared object, we must copy these
744 reloc types into the output file. We create a reloc
745 section in dynobj and make room for this reloc. */
746 if (sreloc == NULL)
747 {
748 sreloc = _bfd_elf_make_dynamic_reloc_section
749 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
750
751 if (sreloc == NULL)
752 return FALSE;
753
754 if (sec->flags & SEC_READONLY)
755 info->flags |= DF_TEXTREL;
756 }
757
758 sreloc->size += sizeof (Elf32_External_Rela);
759
760 /* If we are linking with -Bsymbolic, we count the number of
761 PC relative relocations we have entered for this symbol,
762 so that we can discard them again if the symbol is later
763 defined by a regular object. Note that this function is
764 only called if we are using a vaxelf linker hash table,
765 which means that h is really a pointer to an
766 elf_vax_link_hash_entry. */
767 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
768 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
769 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
770 && info->symbolic)
771 {
772 struct elf_vax_link_hash_entry *eh;
773 struct elf_vax_pcrel_relocs_copied *p;
774
775 eh = (struct elf_vax_link_hash_entry *) h;
776
777 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
778 if (p->section == sreloc)
779 break;
780
781 if (p == NULL)
782 {
783 p = ((struct elf_vax_pcrel_relocs_copied *)
784 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
785 if (p == NULL)
786 return FALSE;
787 p->next = eh->pcrel_relocs_copied;
788 eh->pcrel_relocs_copied = p;
789 p->section = sreloc;
790 p->count = 0;
791 }
792
793 ++p->count;
794 }
795 }
796
797 break;
798
799 /* This relocation describes the C++ object vtable hierarchy.
800 Reconstruct it for later use during GC. */
801 case R_VAX_GNU_VTINHERIT:
802 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
803 return FALSE;
804 break;
805
806 /* This relocation describes which C++ vtable entries are actually
807 used. Record for later use during GC. */
808 case R_VAX_GNU_VTENTRY:
809 BFD_ASSERT (h != NULL);
810 if (h != NULL
811 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
812 return FALSE;
813 break;
814
815 default:
816 break;
817 }
818 }
819
820 return TRUE;
821 }
822
823 /* Return the section that should be marked against GC for a given
824 relocation. */
825
826 static asection *
elf_vax_gc_mark_hook(asection * sec,struct bfd_link_info * info,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)827 elf_vax_gc_mark_hook (asection *sec,
828 struct bfd_link_info *info,
829 Elf_Internal_Rela *rel,
830 struct elf_link_hash_entry *h,
831 Elf_Internal_Sym *sym)
832 {
833 if (h != NULL)
834 switch (ELF32_R_TYPE (rel->r_info))
835 {
836 case R_VAX_GNU_VTINHERIT:
837 case R_VAX_GNU_VTENTRY:
838 return NULL;
839 }
840
841 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
842 }
843
844 /* Update the got entry reference counts for the section being removed. */
845
846 static bfd_boolean
elf_vax_gc_sweep_hook(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)847 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
848 const Elf_Internal_Rela *relocs)
849 {
850 Elf_Internal_Shdr *symtab_hdr;
851 struct elf_link_hash_entry **sym_hashes;
852 const Elf_Internal_Rela *rel, *relend;
853 bfd *dynobj;
854
855 if (info->relocatable)
856 return TRUE;
857
858 dynobj = elf_hash_table (info)->dynobj;
859 if (dynobj == NULL)
860 return TRUE;
861
862 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
863 sym_hashes = elf_sym_hashes (abfd);
864
865 relend = relocs + sec->reloc_count;
866 for (rel = relocs; rel < relend; rel++)
867 {
868 unsigned long r_symndx;
869 struct elf_link_hash_entry *h = NULL;
870
871 r_symndx = ELF32_R_SYM (rel->r_info);
872 if (r_symndx >= symtab_hdr->sh_info)
873 {
874 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
875 while (h->root.type == bfd_link_hash_indirect
876 || h->root.type == bfd_link_hash_warning)
877 h = (struct elf_link_hash_entry *) h->root.u.i.link;
878 }
879
880 switch (ELF32_R_TYPE (rel->r_info))
881 {
882 case R_VAX_GOT32:
883 if (h != NULL && h->got.refcount > 0)
884 --h->got.refcount;
885 break;
886
887 case R_VAX_PLT32:
888 case R_VAX_PC8:
889 case R_VAX_PC16:
890 case R_VAX_PC32:
891 case R_VAX_8:
892 case R_VAX_16:
893 case R_VAX_32:
894 if (h != NULL && h->plt.refcount > 0)
895 --h->plt.refcount;
896 break;
897
898 default:
899 break;
900 }
901 }
902
903 return TRUE;
904 }
905
906 /* Adjust a symbol defined by a dynamic object and referenced by a
907 regular object. The current definition is in some section of the
908 dynamic object, but we're not including those sections. We have to
909 change the definition to something the rest of the link can
910 understand. */
911
912 static bfd_boolean
elf_vax_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)913 elf_vax_adjust_dynamic_symbol (struct bfd_link_info *info,
914 struct elf_link_hash_entry *h)
915 {
916 bfd *dynobj;
917 asection *s;
918
919 dynobj = elf_hash_table (info)->dynobj;
920
921 /* Make sure we know what is going on here. */
922 BFD_ASSERT (dynobj != NULL
923 && (h->needs_plt
924 || h->u.weakdef != NULL
925 || (h->def_dynamic
926 && h->ref_regular
927 && !h->def_regular)));
928
929 /* If this is a function, put it in the procedure linkage table. We
930 will fill in the contents of the procedure linkage table later,
931 when we know the address of the .got section. */
932 if (h->type == STT_FUNC
933 || h->needs_plt)
934 {
935 if (h->plt.refcount <= 0
936 || SYMBOL_CALLS_LOCAL (info, h)
937 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
938 && h->root.type == bfd_link_hash_undefweak))
939 {
940 /* This case can occur if we saw a PLTxx reloc in an input
941 file, but the symbol was never referred to by a dynamic
942 object, or if all references were garbage collected. In
943 such a case, we don't actually need to build a procedure
944 linkage table, and we can just do a PCxx reloc instead. */
945 h->plt.offset = (bfd_vma) -1;
946 h->needs_plt = 0;
947 return TRUE;
948 }
949
950 s = bfd_get_linker_section (dynobj, ".plt");
951 BFD_ASSERT (s != NULL);
952
953 /* If this is the first .plt entry, make room for the special
954 first entry. */
955 if (s->size == 0)
956 {
957 s->size += PLT_ENTRY_SIZE;
958 }
959
960 /* If this symbol is not defined in a regular file, and we are
961 not generating a shared library, then set the symbol to this
962 location in the .plt. This is required to make function
963 pointers compare as equal between the normal executable and
964 the shared library. */
965 if (!info->shared
966 && !h->def_regular)
967 {
968 h->root.u.def.section = s;
969 h->root.u.def.value = s->size;
970 }
971
972 h->plt.offset = s->size;
973
974 /* Make room for this entry. */
975 s->size += PLT_ENTRY_SIZE;
976
977 /* We also need to make an entry in the .got.plt section, which
978 will be placed in the .got section by the linker script. */
979
980 s = bfd_get_linker_section (dynobj, ".got.plt");
981 BFD_ASSERT (s != NULL);
982 s->size += 4;
983
984 /* We also need to make an entry in the .rela.plt section. */
985
986 s = bfd_get_linker_section (dynobj, ".rela.plt");
987 BFD_ASSERT (s != NULL);
988 s->size += sizeof (Elf32_External_Rela);
989
990 return TRUE;
991 }
992
993 /* Reinitialize the plt offset now that it is not used as a reference
994 count any more. */
995 h->plt.offset = (bfd_vma) -1;
996
997 /* If this is a weak symbol, and there is a real definition, the
998 processor independent code will have arranged for us to see the
999 real definition first, and we can just use the same value. */
1000 if (h->u.weakdef != NULL)
1001 {
1002 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1003 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1004 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1005 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1006 return TRUE;
1007 }
1008
1009 /* This is a reference to a symbol defined by a dynamic object which
1010 is not a function. */
1011
1012 /* If we are creating a shared library, we must presume that the
1013 only references to the symbol are via the global offset table.
1014 For such cases we need not do anything here; the relocations will
1015 be handled correctly by relocate_section. */
1016 if (info->shared)
1017 return TRUE;
1018
1019 /* We must allocate the symbol in our .dynbss section, which will
1020 become part of the .bss section of the executable. There will be
1021 an entry for this symbol in the .dynsym section. The dynamic
1022 object will contain position independent code, so all references
1023 from the dynamic object to this symbol will go through the global
1024 offset table. The dynamic linker will use the .dynsym entry to
1025 determine the address it must put in the global offset table, so
1026 both the dynamic object and the regular object will refer to the
1027 same memory location for the variable. */
1028
1029 s = bfd_get_linker_section (dynobj, ".dynbss");
1030 BFD_ASSERT (s != NULL);
1031
1032 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1033 copy the initial value out of the dynamic object and into the
1034 runtime process image. We need to remember the offset into the
1035 .rela.bss section we are going to use. */
1036 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1037 {
1038 asection *srel;
1039
1040 srel = bfd_get_linker_section (dynobj, ".rela.bss");
1041 BFD_ASSERT (srel != NULL);
1042 srel->size += sizeof (Elf32_External_Rela);
1043 h->needs_copy = 1;
1044 }
1045
1046 return _bfd_elf_adjust_dynamic_copy (h, s);
1047 }
1048
1049 /* This function is called via elf_link_hash_traverse. It resets GOT
1050 and PLT (.GOT) reference counts back to -1 so normal PC32 relocation
1051 will be done. */
1052
1053 static bfd_boolean
elf_vax_discard_got_entries(struct elf_link_hash_entry * h,void * infoptr ATTRIBUTE_UNUSED)1054 elf_vax_discard_got_entries (struct elf_link_hash_entry *h,
1055 void *infoptr ATTRIBUTE_UNUSED)
1056 {
1057 h->got.refcount = -1;
1058 h->plt.refcount = -1;
1059
1060 return TRUE;
1061 }
1062
1063 /* Discard unused dynamic data if this is a static link. */
1064
1065 static bfd_boolean
elf_vax_always_size_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)1066 elf_vax_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1067 struct bfd_link_info *info)
1068 {
1069 bfd *dynobj;
1070 asection *s;
1071
1072 dynobj = elf_hash_table (info)->dynobj;
1073
1074 if (dynobj && !elf_hash_table (info)->dynamic_sections_created)
1075 {
1076 /* We may have created entries in the .rela.got and .got sections.
1077 However, if we are not creating the dynamic sections, we will
1078 not actually use these entries. Reset the size of .rela.got
1079 and .got, which will cause them to get stripped from the output
1080 file below. */
1081 s = bfd_get_linker_section (dynobj, ".rela.got");
1082 if (s != NULL)
1083 s->size = 0;
1084 s = bfd_get_linker_section (dynobj, ".got.plt");
1085 if (s != NULL)
1086 s->size = 0;
1087 s = bfd_get_linker_section (dynobj, ".got");
1088 if (s != NULL)
1089 s->size = 0;
1090 }
1091
1092 /* If this is a static link, we need to discard all the got entries we've
1093 recorded. */
1094 if (!dynobj || !elf_hash_table (info)->dynamic_sections_created)
1095 elf_link_hash_traverse (elf_hash_table (info),
1096 elf_vax_discard_got_entries,
1097 info);
1098
1099 return TRUE;
1100 }
1101
1102 /* Set the sizes of the dynamic sections. */
1103
1104 static bfd_boolean
elf_vax_size_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)1105 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1106 {
1107 bfd *dynobj;
1108 asection *s;
1109 bfd_boolean plt;
1110 bfd_boolean relocs;
1111 bfd_boolean reltext;
1112
1113 dynobj = elf_hash_table (info)->dynobj;
1114 BFD_ASSERT (dynobj != NULL);
1115
1116 if (elf_hash_table (info)->dynamic_sections_created)
1117 {
1118 /* Set the contents of the .interp section to the interpreter. */
1119 if (info->executable)
1120 {
1121 s = bfd_get_linker_section (dynobj, ".interp");
1122 BFD_ASSERT (s != NULL);
1123 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1124 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1125 }
1126 }
1127
1128 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1129 relative relocs against symbols defined in a regular object. We
1130 allocated space for them in the check_relocs routine, but we will not
1131 fill them in in the relocate_section routine. */
1132 if (info->shared && info->symbolic)
1133 elf_vax_link_hash_traverse (elf_hash_table (info),
1134 elf_vax_discard_copies,
1135 NULL);
1136
1137 /* If this is a -Bsymbolic shared link, we need to discard all the got
1138 entries we've recorded. Otherwise, we need to instantiate (allocate
1139 space for them). */
1140 elf_link_hash_traverse (elf_hash_table (info),
1141 elf_vax_instantiate_got_entries,
1142 info);
1143
1144 /* The check_relocs and adjust_dynamic_symbol entry points have
1145 determined the sizes of the various dynamic sections. Allocate
1146 memory for them. */
1147 plt = FALSE;
1148 relocs = FALSE;
1149 reltext = FALSE;
1150 for (s = dynobj->sections; s != NULL; s = s->next)
1151 {
1152 const char *name;
1153
1154 if ((s->flags & SEC_LINKER_CREATED) == 0)
1155 continue;
1156
1157 /* It's OK to base decisions on the section name, because none
1158 of the dynobj section names depend upon the input files. */
1159 name = bfd_get_section_name (dynobj, s);
1160
1161 if (strcmp (name, ".plt") == 0)
1162 {
1163 /* Remember whether there is a PLT. */
1164 plt = s->size != 0;
1165 }
1166 else if (CONST_STRNEQ (name, ".rela"))
1167 {
1168 if (s->size != 0)
1169 {
1170 asection *target;
1171
1172 /* Remember whether there are any reloc sections other
1173 than .rela.plt. */
1174 if (strcmp (name, ".rela.plt") != 0)
1175 {
1176 const char *outname;
1177
1178 relocs = TRUE;
1179
1180 /* If this relocation section applies to a read only
1181 section, then we probably need a DT_TEXTREL
1182 entry. .rela.plt is actually associated with
1183 .got.plt, which is never readonly. */
1184 outname = bfd_get_section_name (output_bfd,
1185 s->output_section);
1186 target = bfd_get_section_by_name (output_bfd, outname + 5);
1187 if (target != NULL
1188 && (target->flags & SEC_READONLY) != 0
1189 && (target->flags & SEC_ALLOC) != 0)
1190 reltext = TRUE;
1191 }
1192
1193 /* We use the reloc_count field as a counter if we need
1194 to copy relocs into the output file. */
1195 s->reloc_count = 0;
1196 }
1197 }
1198 else if (! CONST_STRNEQ (name, ".got")
1199 && strcmp (name, ".dynbss") != 0)
1200 {
1201 /* It's not one of our sections, so don't allocate space. */
1202 continue;
1203 }
1204
1205 if (s->size == 0)
1206 {
1207 /* If we don't need this section, strip it from the
1208 output file. This is mostly to handle .rela.bss and
1209 .rela.plt. We must create both sections in
1210 create_dynamic_sections, because they must be created
1211 before the linker maps input sections to output
1212 sections. The linker does that before
1213 adjust_dynamic_symbol is called, and it is that
1214 function which decides whether anything needs to go
1215 into these sections. */
1216 s->flags |= SEC_EXCLUDE;
1217 continue;
1218 }
1219
1220 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1221 continue;
1222
1223 /* Allocate memory for the section contents. */
1224 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1225 if (s->contents == NULL)
1226 return FALSE;
1227 }
1228
1229 if (elf_hash_table (info)->dynamic_sections_created)
1230 {
1231 /* Add some entries to the .dynamic section. We fill in the
1232 values later, in elf_vax_finish_dynamic_sections, but we
1233 must add the entries now so that we get the correct size for
1234 the .dynamic section. The DT_DEBUG entry is filled in by the
1235 dynamic linker and used by the debugger. */
1236 #define add_dynamic_entry(TAG, VAL) \
1237 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1238
1239 if (!info->shared)
1240 {
1241 if (!add_dynamic_entry (DT_DEBUG, 0))
1242 return FALSE;
1243 }
1244
1245 if (plt)
1246 {
1247 if (!add_dynamic_entry (DT_PLTGOT, 0)
1248 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1249 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1250 || !add_dynamic_entry (DT_JMPREL, 0))
1251 return FALSE;
1252 }
1253
1254 if (relocs)
1255 {
1256 if (!add_dynamic_entry (DT_RELA, 0)
1257 || !add_dynamic_entry (DT_RELASZ, 0)
1258 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1259 return FALSE;
1260 }
1261
1262 if (reltext || (info->flags & DF_TEXTREL) != 0)
1263 {
1264 if (!add_dynamic_entry (DT_TEXTREL, 0))
1265 return FALSE;
1266 }
1267 }
1268 #undef add_dynamic_entry
1269
1270 return TRUE;
1271 }
1272
1273 /* This function is called via elf_vax_link_hash_traverse if we are
1274 creating a shared object with -Bsymbolic. It discards the space
1275 allocated to copy PC relative relocs against symbols which are defined
1276 in regular objects. We allocated space for them in the check_relocs
1277 routine, but we won't fill them in in the relocate_section routine. */
1278
1279 static bfd_boolean
elf_vax_discard_copies(struct elf_vax_link_hash_entry * h,void * ignore ATTRIBUTE_UNUSED)1280 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1281 void * ignore ATTRIBUTE_UNUSED)
1282 {
1283 struct elf_vax_pcrel_relocs_copied *s;
1284
1285 /* We only discard relocs for symbols defined in a regular object. */
1286 if (!h->root.def_regular)
1287 return TRUE;
1288
1289 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1290 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1291
1292 return TRUE;
1293 }
1294
1295 /* This function is called via elf_link_hash_traverse. It looks for
1296 entries that have GOT or PLT (.GOT) references. If creating a shared
1297 object with -Bsymbolic, or the symbol has been forced local, then it
1298 resets the reference count back to -1 so normal PC32 relocation will
1299 be done. Otherwise space in the .got and .rela.got will be reserved
1300 for the symbol. */
1301
1302 static bfd_boolean
elf_vax_instantiate_got_entries(struct elf_link_hash_entry * h,void * infoptr)1303 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr)
1304 {
1305 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1306 bfd *dynobj;
1307 asection *sgot;
1308 asection *srelgot;
1309
1310 /* We don't care about non-GOT (and non-PLT) entries. */
1311 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1312 return TRUE;
1313
1314 dynobj = elf_hash_table (info)->dynobj;
1315 BFD_ASSERT (dynobj != NULL);
1316
1317 sgot = bfd_get_linker_section (dynobj, ".got");
1318 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1319
1320 if (SYMBOL_REFERENCES_LOCAL (info, h))
1321 {
1322 h->got.refcount = -1;
1323 h->plt.refcount = -1;
1324 }
1325 else if (h->got.refcount > 0)
1326 {
1327 /* Make sure this symbol is output as a dynamic symbol. */
1328 if (h->dynindx == -1)
1329 {
1330 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1331 return FALSE;
1332 }
1333
1334 /* Allocate space in the .got and .rela.got sections. */
1335 sgot->size += 4;
1336 srelgot->size += sizeof (Elf32_External_Rela);
1337 }
1338
1339 return TRUE;
1340 }
1341
1342 /* Relocate an VAX ELF section. */
1343
1344 static bfd_boolean
elf_vax_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)1345 elf_vax_relocate_section (bfd *output_bfd,
1346 struct bfd_link_info *info,
1347 bfd *input_bfd,
1348 asection *input_section,
1349 bfd_byte *contents,
1350 Elf_Internal_Rela *relocs,
1351 Elf_Internal_Sym *local_syms,
1352 asection **local_sections)
1353 {
1354 bfd *dynobj;
1355 Elf_Internal_Shdr *symtab_hdr;
1356 struct elf_link_hash_entry **sym_hashes;
1357 bfd_vma plt_index;
1358 bfd_vma got_offset;
1359 asection *sgot;
1360 asection *splt;
1361 asection *sgotplt;
1362 asection *sreloc;
1363 Elf_Internal_Rela *rel;
1364 Elf_Internal_Rela *relend;
1365
1366 dynobj = elf_hash_table (info)->dynobj;
1367 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1368 sym_hashes = elf_sym_hashes (input_bfd);
1369
1370 sgot = NULL;
1371 splt = NULL;
1372 sgotplt = NULL;
1373 sreloc = NULL;
1374
1375 rel = relocs;
1376 relend = relocs + input_section->reloc_count;
1377 for (; rel < relend; rel++)
1378 {
1379 int r_type;
1380 reloc_howto_type *howto;
1381 unsigned long r_symndx;
1382 struct elf_link_hash_entry *h;
1383 Elf_Internal_Sym *sym;
1384 asection *sec;
1385 bfd_vma relocation;
1386 bfd_reloc_status_type r;
1387
1388 r_type = ELF32_R_TYPE (rel->r_info);
1389 if (r_type < 0 || r_type >= (int) R_VAX_max)
1390 {
1391 bfd_set_error (bfd_error_bad_value);
1392 return FALSE;
1393 }
1394 howto = howto_table + r_type;
1395
1396 r_symndx = ELF32_R_SYM (rel->r_info);
1397 h = NULL;
1398 sym = NULL;
1399 sec = NULL;
1400 if (r_symndx < symtab_hdr->sh_info)
1401 {
1402 sym = local_syms + r_symndx;
1403 sec = local_sections[r_symndx];
1404 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1405 }
1406 else
1407 {
1408 bfd_boolean unresolved_reloc;
1409 bfd_boolean warned, ignored;
1410
1411 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1412 r_symndx, symtab_hdr, sym_hashes,
1413 h, sec, relocation,
1414 unresolved_reloc, warned, ignored);
1415
1416 if ((h->root.type == bfd_link_hash_defined
1417 || h->root.type == bfd_link_hash_defweak)
1418 && ((r_type == R_VAX_PLT32
1419 && h->plt.offset != (bfd_vma) -1
1420 && !h->forced_local
1421 && elf_hash_table (info)->dynamic_sections_created)
1422 || (r_type == R_VAX_GOT32
1423 && h->got.offset != (bfd_vma) -1
1424 && !h->forced_local
1425 && elf_hash_table (info)->dynamic_sections_created
1426 && (! info->shared
1427 || (! info->symbolic && h->dynindx != -1)
1428 || !h->def_regular))
1429 || (info->shared
1430 && ((! info->symbolic && h->dynindx != -1)
1431 || !h->def_regular)
1432 && ((input_section->flags & SEC_ALLOC) != 0
1433 /* DWARF will emit R_VAX_32 relocations in its
1434 sections against symbols defined externally
1435 in shared libraries. We can't do anything
1436 with them here. */
1437
1438 || ((input_section->flags & SEC_DEBUGGING) != 0
1439 && h->def_dynamic))
1440 && (r_type == R_VAX_8
1441 || r_type == R_VAX_16
1442 || r_type == R_VAX_32))))
1443 /* In these cases, we don't need the relocation
1444 value. We check specially because in some
1445 obscure cases sec->output_section will be NULL. */
1446 relocation = 0;
1447 }
1448
1449 if (sec != NULL && discarded_section (sec))
1450 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1451 rel, 1, relend, howto, 0, contents);
1452
1453 if (info->relocatable)
1454 continue;
1455
1456 switch (r_type)
1457 {
1458 case R_VAX_GOT32:
1459 /* Relocation is to the address of the entry for this symbol
1460 in the global offset table. */
1461
1462 /* Resolve a GOTxx reloc against a local symbol directly,
1463 without using the global offset table. */
1464 if (h == NULL
1465 || h->got.offset == (bfd_vma) -1)
1466 break;
1467
1468 {
1469 bfd_vma off;
1470
1471 if (sgot == NULL)
1472 {
1473 sgot = bfd_get_linker_section (dynobj, ".got");
1474 BFD_ASSERT (sgot != NULL);
1475 }
1476
1477 off = h->got.offset;
1478 BFD_ASSERT (off < sgot->size);
1479
1480 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1481
1482 relocation = sgot->output_offset + off;
1483 /* The GOT relocation uses the addend. */
1484 rel->r_addend = 0;
1485
1486 /* Change the reference to be indirect. */
1487 contents[rel->r_offset - 1] |= 0x10;
1488 relocation += sgot->output_section->vma;
1489 }
1490 break;
1491
1492 case R_VAX_PC32:
1493 /* If we are creating an executable and the function this
1494 reloc refers to is in a shared lib, then we made a PLT
1495 entry for this symbol and need to handle the reloc like
1496 a PLT reloc. */
1497 if (info->shared)
1498 goto r_vax_pc32_shared;
1499 /* Fall through. */
1500 case R_VAX_PLT32:
1501 /* Relocation is to the entry for this symbol in the
1502 procedure linkage table. */
1503
1504 /* Resolve a PLTxx reloc against a local symbol directly,
1505 without using the procedure linkage table. */
1506 if (h == NULL
1507 || h->plt.offset == (bfd_vma) -1)
1508 break;
1509
1510 if (splt == NULL)
1511 {
1512 splt = bfd_get_linker_section (dynobj, ".plt");
1513 BFD_ASSERT (splt != NULL);
1514 }
1515
1516 if (sgotplt == NULL)
1517 {
1518 sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1519 BFD_ASSERT (sgotplt != NULL);
1520 }
1521
1522 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1523
1524 /* Get the offset into the .got table of the entry that
1525 corresponds to this function. Each .got entry is 4 bytes.
1526 The first two are reserved. */
1527 got_offset = (plt_index + 3) * 4;
1528
1529 /* We want the relocation to point into the .got.plt instead
1530 of the plt itself. */
1531 relocation = (sgotplt->output_section->vma
1532 + sgotplt->output_offset
1533 + got_offset);
1534 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1535 if (rel->r_addend == 2)
1536 {
1537 h->plt.offset |= 1;
1538 }
1539 else if (rel->r_addend != 0)
1540 (*_bfd_error_handler)
1541 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1542 bfd_get_filename (input_bfd), rel->r_addend,
1543 h->root.root.string,
1544 bfd_get_section_name (input_bfd, input_section));
1545 rel->r_addend = 0;
1546
1547 break;
1548
1549 case R_VAX_PC8:
1550 case R_VAX_PC16:
1551 r_vax_pc32_shared:
1552 if (h == NULL
1553 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1554 || h->forced_local)
1555 break;
1556 /* Fall through. */
1557 case R_VAX_8:
1558 case R_VAX_16:
1559 case R_VAX_32:
1560 if (info->shared
1561 && r_symndx != STN_UNDEF
1562 && (input_section->flags & SEC_ALLOC) != 0
1563 && ((r_type != R_VAX_PC8
1564 && r_type != R_VAX_PC16
1565 && r_type != R_VAX_PC32)
1566 || ((input_section->flags & SEC_CODE)
1567 && (!info->symbolic
1568 || (!h->def_regular && h->type != STT_SECTION)))))
1569 {
1570 Elf_Internal_Rela outrel;
1571 bfd_byte *loc;
1572 bfd_boolean skip, relocate;
1573
1574 /* When generating a shared object, these relocations
1575 are copied into the output file to be resolved at run
1576 time. */
1577 if (sreloc == NULL)
1578 {
1579 sreloc = _bfd_elf_get_dynamic_reloc_section
1580 (input_bfd, input_section, /*rela?*/ TRUE);
1581 if (sreloc == NULL)
1582 return FALSE;
1583 }
1584
1585 skip = FALSE;
1586 relocate = FALSE;
1587
1588 outrel.r_offset =
1589 _bfd_elf_section_offset (output_bfd, info, input_section,
1590 rel->r_offset);
1591 if (outrel.r_offset == (bfd_vma) -1)
1592 skip = TRUE;
1593 if (outrel.r_offset == (bfd_vma) -2)
1594 skip = TRUE, relocate = TRUE;
1595 outrel.r_offset += (input_section->output_section->vma
1596 + input_section->output_offset);
1597
1598 if (skip)
1599 memset (&outrel, 0, sizeof outrel);
1600 /* h->dynindx may be -1 if the symbol was marked to
1601 become local. */
1602 else if (h != NULL
1603 && ((! info->symbolic && h->dynindx != -1)
1604 || !h->def_regular))
1605 {
1606 BFD_ASSERT (h->dynindx != -1);
1607 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1608 outrel.r_addend = relocation + rel->r_addend;
1609 }
1610 else
1611 {
1612 if (r_type == R_VAX_32)
1613 {
1614 relocate = TRUE;
1615 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1616 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1617 &contents[rel->r_offset]) == 0);
1618 outrel.r_addend = relocation + rel->r_addend;
1619 }
1620 else
1621 {
1622 long indx;
1623
1624 if (bfd_is_abs_section (sec))
1625 indx = 0;
1626 else if (sec == NULL || sec->owner == NULL)
1627 {
1628 bfd_set_error (bfd_error_bad_value);
1629 return FALSE;
1630 }
1631 else
1632 {
1633 asection *osec;
1634
1635 /* We are turning this relocation into one
1636 against a section symbol. It would be
1637 proper to subtract the symbol's value,
1638 osec->vma, from the emitted reloc addend,
1639 but ld.so expects buggy relocs. */
1640 osec = sec->output_section;
1641 indx = elf_section_data (osec)->dynindx;
1642 if (indx == 0)
1643 {
1644 struct elf_link_hash_table *htab;
1645 htab = elf_hash_table (info);
1646 osec = htab->text_index_section;
1647 indx = elf_section_data (osec)->dynindx;
1648 }
1649 BFD_ASSERT (indx != 0);
1650 }
1651
1652 outrel.r_info = ELF32_R_INFO (indx, r_type);
1653 outrel.r_addend = relocation + rel->r_addend;
1654 }
1655 }
1656
1657 if ((input_section->flags & SEC_CODE) != 0
1658 || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32
1659 && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE
1660 && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY
1661 && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT
1662 && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT))
1663 {
1664 if (h != NULL)
1665 (*_bfd_error_handler)
1666 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1667 bfd_get_filename (input_bfd), howto->name,
1668 h->root.root.string,
1669 bfd_get_section_name (input_bfd, input_section));
1670 else
1671 (*_bfd_error_handler)
1672 (_("%s: warning: %s relocation to 0x%x from %s section"),
1673 bfd_get_filename (input_bfd), howto->name,
1674 outrel.r_addend,
1675 bfd_get_section_name (input_bfd, input_section));
1676 }
1677 loc = sreloc->contents;
1678 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1679 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1680
1681 /* This reloc will be computed at runtime, so there's no
1682 need to do anything now, except for R_VAX_32
1683 relocations that have been turned into
1684 R_VAX_RELATIVE. */
1685 if (!relocate)
1686 continue;
1687 }
1688
1689 break;
1690
1691 case R_VAX_GNU_VTINHERIT:
1692 case R_VAX_GNU_VTENTRY:
1693 /* These are no-ops in the end. */
1694 continue;
1695
1696 default:
1697 break;
1698 }
1699
1700 /* VAX PCREL relocations are from the end of relocation, not the start.
1701 So subtract the difference from the relocation amount since we can't
1702 add it to the offset. */
1703 if (howto->pc_relative && howto->pcrel_offset)
1704 relocation -= bfd_get_reloc_size(howto);
1705
1706 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1707 contents, rel->r_offset,
1708 relocation, rel->r_addend);
1709
1710 if (r != bfd_reloc_ok)
1711 {
1712 switch (r)
1713 {
1714 default:
1715 case bfd_reloc_outofrange:
1716 abort ();
1717 case bfd_reloc_overflow:
1718 {
1719 const char *name;
1720
1721 if (h != NULL)
1722 name = NULL;
1723 else
1724 {
1725 name = bfd_elf_string_from_elf_section (input_bfd,
1726 symtab_hdr->sh_link,
1727 sym->st_name);
1728 if (name == NULL)
1729 return FALSE;
1730 if (*name == '\0')
1731 name = bfd_section_name (input_bfd, sec);
1732 }
1733 if (!(info->callbacks->reloc_overflow
1734 (info, (h ? &h->root : NULL), name, howto->name,
1735 (bfd_vma) 0, input_bfd, input_section,
1736 rel->r_offset)))
1737 return FALSE;
1738 }
1739 break;
1740 }
1741 }
1742 }
1743
1744 return TRUE;
1745 }
1746
1747 /* Finish up dynamic symbol handling. We set the contents of various
1748 dynamic sections here. */
1749
1750 static bfd_boolean
elf_vax_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)1751 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1752 struct elf_link_hash_entry *h,
1753 Elf_Internal_Sym *sym)
1754 {
1755 bfd *dynobj;
1756
1757 dynobj = elf_hash_table (info)->dynobj;
1758
1759 if (h->plt.offset != (bfd_vma) -1)
1760 {
1761 asection *splt;
1762 asection *sgot;
1763 asection *srela;
1764 bfd_vma plt_index;
1765 bfd_vma got_offset;
1766 bfd_vma addend;
1767 Elf_Internal_Rela rela;
1768 bfd_byte *loc;
1769
1770 /* This symbol has an entry in the procedure linkage table. Set
1771 it up. */
1772 BFD_ASSERT (h->dynindx != -1);
1773
1774 splt = bfd_get_linker_section (dynobj, ".plt");
1775 sgot = bfd_get_linker_section (dynobj, ".got.plt");
1776 srela = bfd_get_linker_section (dynobj, ".rela.plt");
1777 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1778
1779 addend = 2 * (h->plt.offset & 1);
1780 h->plt.offset &= ~1;
1781
1782 /* Get the index in the procedure linkage table which
1783 corresponds to this symbol. This is the index of this symbol
1784 in all the symbols for which we are making plt entries. The
1785 first entry in the procedure linkage table is reserved. */
1786 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1787
1788 /* Get the offset into the .got table of the entry that
1789 corresponds to this function. Each .got entry is 4 bytes.
1790 The first two are reserved. */
1791 got_offset = (plt_index + 3) * 4;
1792
1793 /* Fill in the entry in the procedure linkage table. */
1794 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1795 PLT_ENTRY_SIZE);
1796
1797 /* The offset is relative to the first extension word. */
1798 bfd_put_32 (output_bfd,
1799 -(h->plt.offset + 8),
1800 splt->contents + h->plt.offset + 4);
1801
1802 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1803 splt->contents + h->plt.offset + 8);
1804
1805 /* Fill in the entry in the global offset table. */
1806 bfd_put_32 (output_bfd,
1807 (splt->output_section->vma
1808 + splt->output_offset
1809 + h->plt.offset) + addend,
1810 sgot->contents + got_offset);
1811
1812 /* Fill in the entry in the .rela.plt section. */
1813 rela.r_offset = (sgot->output_section->vma
1814 + sgot->output_offset
1815 + got_offset);
1816 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1817 rela.r_addend = addend;
1818 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1819 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1820
1821 if (!h->def_regular)
1822 {
1823 /* Mark the symbol as undefined, rather than as defined in
1824 the .plt section. Leave the value alone. */
1825 sym->st_shndx = SHN_UNDEF;
1826 }
1827 }
1828
1829 if (h->got.offset != (bfd_vma) -1)
1830 {
1831 asection *sgot;
1832 asection *srela;
1833 Elf_Internal_Rela rela;
1834 bfd_byte *loc;
1835
1836 /* This symbol has an entry in the global offset table. Set it
1837 up. */
1838 sgot = bfd_get_linker_section (dynobj, ".got");
1839 srela = bfd_get_linker_section (dynobj, ".rela.got");
1840 BFD_ASSERT (sgot != NULL && srela != NULL);
1841
1842 rela.r_offset = (sgot->output_section->vma
1843 + sgot->output_offset
1844 + h->got.offset);
1845 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1846 rela.r_addend = bfd_get_signed_32 (output_bfd,
1847 sgot->contents + h->got.offset);
1848
1849 loc = srela->contents;
1850 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1851 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1852 }
1853
1854 if (h->needs_copy)
1855 {
1856 asection *s;
1857 Elf_Internal_Rela rela;
1858 bfd_byte *loc;
1859
1860 /* This symbol needs a copy reloc. Set it up. */
1861 BFD_ASSERT (h->dynindx != -1
1862 && (h->root.type == bfd_link_hash_defined
1863 || h->root.type == bfd_link_hash_defweak));
1864
1865 s = bfd_get_linker_section (dynobj, ".rela.bss");
1866 BFD_ASSERT (s != NULL);
1867
1868 rela.r_offset = (h->root.u.def.value
1869 + h->root.u.def.section->output_section->vma
1870 + h->root.u.def.section->output_offset);
1871 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1872 rela.r_addend = 0;
1873 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1874 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1875 }
1876
1877 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1878 if (h == elf_hash_table (info)->hdynamic
1879 || h == elf_hash_table (info)->hgot)
1880 sym->st_shndx = SHN_ABS;
1881
1882 return TRUE;
1883 }
1884
1885 /* Finish up the dynamic sections. */
1886
1887 static bfd_boolean
elf_vax_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)1888 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1889 {
1890 bfd *dynobj;
1891 asection *sgot;
1892 asection *sdyn;
1893
1894 dynobj = elf_hash_table (info)->dynobj;
1895
1896 sgot = bfd_get_linker_section (dynobj, ".got.plt");
1897 BFD_ASSERT (sgot != NULL);
1898 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
1899
1900 if (elf_hash_table (info)->dynamic_sections_created)
1901 {
1902 asection *splt;
1903 Elf32_External_Dyn *dyncon, *dynconend;
1904
1905 splt = bfd_get_linker_section (dynobj, ".plt");
1906 BFD_ASSERT (splt != NULL && sdyn != NULL);
1907
1908 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1909 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1910 for (; dyncon < dynconend; dyncon++)
1911 {
1912 Elf_Internal_Dyn dyn;
1913 const char *name;
1914 asection *s;
1915
1916 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1917
1918 switch (dyn.d_tag)
1919 {
1920 default:
1921 break;
1922
1923 case DT_PLTGOT:
1924 name = ".got";
1925 goto get_vma;
1926 case DT_JMPREL:
1927 name = ".rela.plt";
1928 get_vma:
1929 s = bfd_get_section_by_name (output_bfd, name);
1930 BFD_ASSERT (s != NULL);
1931 dyn.d_un.d_ptr = s->vma;
1932 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1933 break;
1934
1935 case DT_PLTRELSZ:
1936 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1937 BFD_ASSERT (s != NULL);
1938 dyn.d_un.d_val = s->size;
1939 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1940 break;
1941
1942 case DT_RELASZ:
1943 /* The procedure linkage table relocs (DT_JMPREL) should
1944 not be included in the overall relocs (DT_RELA).
1945 Therefore, we override the DT_RELASZ entry here to
1946 make it not include the JMPREL relocs. Since the
1947 linker script arranges for .rela.plt to follow all
1948 other relocation sections, we don't have to worry
1949 about changing the DT_RELA entry. */
1950 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1951 if (s != NULL)
1952 dyn.d_un.d_val -= s->size;
1953 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1954 break;
1955 }
1956 }
1957
1958 /* Fill in the first entry in the procedure linkage table. */
1959 if (splt->size > 0)
1960 {
1961 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
1962 bfd_put_32 (output_bfd,
1963 (sgot->output_section->vma
1964 + sgot->output_offset + 4
1965 - (splt->output_section->vma + 6)),
1966 splt->contents + 2);
1967 bfd_put_32 (output_bfd,
1968 (sgot->output_section->vma
1969 + sgot->output_offset + 8
1970 - (splt->output_section->vma + 12)),
1971 splt->contents + 8);
1972 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1973 = PLT_ENTRY_SIZE;
1974 }
1975 }
1976
1977 /* Fill in the first three entries in the global offset table. */
1978 if (sgot->size > 0)
1979 {
1980 if (sdyn == NULL)
1981 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1982 else
1983 bfd_put_32 (output_bfd,
1984 sdyn->output_section->vma + sdyn->output_offset,
1985 sgot->contents);
1986 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1987 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1988 }
1989
1990 if (elf_section_data (sgot->output_section) != NULL)
1991 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1992
1993 return TRUE;
1994 }
1995
1996 static enum elf_reloc_type_class
elf_vax_reloc_type_class(const struct bfd_link_info * info ATTRIBUTE_UNUSED,const asection * rel_sec ATTRIBUTE_UNUSED,const Elf_Internal_Rela * rela)1997 elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
1998 const asection *rel_sec ATTRIBUTE_UNUSED,
1999 const Elf_Internal_Rela *rela)
2000 {
2001 switch ((int) ELF32_R_TYPE (rela->r_info))
2002 {
2003 case R_VAX_RELATIVE:
2004 return reloc_class_relative;
2005 case R_VAX_JMP_SLOT:
2006 return reloc_class_plt;
2007 case R_VAX_COPY:
2008 return reloc_class_copy;
2009 default:
2010 return reloc_class_normal;
2011 }
2012 }
2013
2014 static bfd_vma
elf_vax_plt_sym_val(bfd_vma i,const asection * plt,const arelent * rel ATTRIBUTE_UNUSED)2015 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
2016 const arelent *rel ATTRIBUTE_UNUSED)
2017 {
2018 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
2019 }
2020
2021 #define TARGET_LITTLE_SYM vax_elf32_vec
2022 #define TARGET_LITTLE_NAME "elf32-vax"
2023 #define ELF_MACHINE_CODE EM_VAX
2024 #define ELF_MAXPAGESIZE 0x1000
2025
2026 #define elf_backend_create_dynamic_sections \
2027 _bfd_elf_create_dynamic_sections
2028 #define bfd_elf32_bfd_link_hash_table_create \
2029 elf_vax_link_hash_table_create
2030 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2031
2032 #define elf_backend_check_relocs elf_vax_check_relocs
2033 #define elf_backend_adjust_dynamic_symbol \
2034 elf_vax_adjust_dynamic_symbol
2035 #define elf_backend_always_size_sections \
2036 elf_vax_always_size_sections
2037 #define elf_backend_size_dynamic_sections \
2038 elf_vax_size_dynamic_sections
2039 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2040 #define elf_backend_relocate_section elf_vax_relocate_section
2041 #define elf_backend_finish_dynamic_symbol \
2042 elf_vax_finish_dynamic_symbol
2043 #define elf_backend_finish_dynamic_sections \
2044 elf_vax_finish_dynamic_sections
2045 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2046 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2047 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2048 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2049 #define bfd_elf32_bfd_merge_private_bfd_data \
2050 elf32_vax_merge_private_bfd_data
2051 #define bfd_elf32_bfd_set_private_flags \
2052 elf32_vax_set_private_flags
2053 #define bfd_elf32_bfd_print_private_bfd_data \
2054 elf32_vax_print_private_bfd_data
2055
2056 #define elf_backend_can_gc_sections 1
2057 #define elf_backend_want_got_plt 1
2058 #define elf_backend_plt_readonly 1
2059 #define elf_backend_want_plt_sym 0
2060 #define elf_backend_got_header_size 16
2061 #define elf_backend_rela_normal 1
2062
2063 #include "elf32-target.h"
2064