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* elf.c (sym_is_global): Return a bfd_boolean.
[binutils.git] / bfd / elf32-vax.c
blobbf481e459e75d496cb1902f2e607ec991bffbe64
1 /* VAX series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006 Free Software Foundation, Inc.
4 Contributed by Matt Thomas <matt@3am-software.com>.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
21
22 #include "bfd.h"
23 #include "sysdep.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 asection *elf_vax_gc_mark_hook (asection *, struct bfd_link_info *,
38 Elf_Internal_Rela *,
39 struct elf_link_hash_entry *,
40 Elf_Internal_Sym *);
41 static bfd_boolean elf_vax_gc_sweep_hook (bfd *, struct bfd_link_info *,
42 asection *,
43 const Elf_Internal_Rela *);
44 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
45 struct elf_link_hash_entry *);
46 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
47 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
48 bfd *, asection *, bfd_byte *,
49 Elf_Internal_Rela *,
50 Elf_Internal_Sym *, asection **);
51 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
52 struct elf_link_hash_entry *,
53 Elf_Internal_Sym *);
54 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
55 struct bfd_link_info *);
56
57 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
58 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
59 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, PTR);
60
61 static reloc_howto_type howto_table[] = {
62 HOWTO (R_VAX_NONE, /* type */
63 0, /* rightshift */
64 0, /* size (0 = byte, 1 = short, 2 = long) */
65 0, /* bitsize */
66 FALSE, /* pc_relative */
67 0, /* bitpos */
68 complain_overflow_dont, /* complain_on_overflow */
69 bfd_elf_generic_reloc, /* special_function */
70 "R_VAX_NONE", /* name */
71 FALSE, /* partial_inplace */
72 0, /* src_mask */
73 0x00000000, /* dst_mask */
74 FALSE), /* pcrel_offset */
75
76 HOWTO (R_VAX_32, /* type */
77 0, /* rightshift */
78 2, /* size (0 = byte, 1 = short, 2 = long) */
79 32, /* bitsize */
80 FALSE, /* pc_relative */
81 0, /* bitpos */
82 complain_overflow_bitfield, /* complain_on_overflow */
83 bfd_elf_generic_reloc, /* special_function */
84 "R_VAX_32", /* name */
85 FALSE, /* partial_inplace */
86 0, /* src_mask */
87 0xffffffff, /* dst_mask */
88 FALSE), /* pcrel_offset */
89
90 HOWTO (R_VAX_16, /* type */
91 0, /* rightshift */
92 1, /* size (0 = byte, 1 = short, 2 = long) */
93 16, /* bitsize */
94 FALSE, /* pc_relative */
95 0, /* bitpos */
96 complain_overflow_bitfield, /* complain_on_overflow */
97 bfd_elf_generic_reloc, /* special_function */
98 "R_VAX_16", /* name */
99 FALSE, /* partial_inplace */
100 0, /* src_mask */
101 0x0000ffff, /* dst_mask */
102 FALSE), /* pcrel_offset */
103
104 HOWTO (R_VAX_8, /* type */
105 0, /* rightshift */
106 0, /* size (0 = byte, 1 = short, 2 = long) */
107 8, /* bitsize */
108 FALSE, /* pc_relative */
109 0, /* bitpos */
110 complain_overflow_bitfield, /* complain_on_overflow */
111 bfd_elf_generic_reloc, /* special_function */
112 "R_VAX_8", /* name */
113 FALSE, /* partial_inplace */
114 0, /* src_mask */
115 0x000000ff, /* dst_mask */
116 FALSE), /* pcrel_offset */
117
118 HOWTO (R_VAX_PC32, /* type */
119 0, /* rightshift */
120 2, /* size (0 = byte, 1 = short, 2 = long) */
121 32, /* bitsize */
122 TRUE, /* pc_relative */
123 0, /* bitpos */
124 complain_overflow_bitfield, /* complain_on_overflow */
125 bfd_elf_generic_reloc, /* special_function */
126 "R_VAX_PC32", /* name */
127 FALSE, /* partial_inplace */
128 0, /* src_mask */
129 0xffffffff, /* dst_mask */
130 TRUE), /* pcrel_offset */
131
132 HOWTO (R_VAX_PC16, /* type */
133 0, /* rightshift */
134 1, /* size (0 = byte, 1 = short, 2 = long) */
135 16, /* bitsize */
136 TRUE, /* pc_relative */
137 0, /* bitpos */
138 complain_overflow_signed, /* complain_on_overflow */
139 bfd_elf_generic_reloc, /* special_function */
140 "R_VAX_PC16", /* name */
141 FALSE, /* partial_inplace */
142 0, /* src_mask */
143 0x0000ffff, /* dst_mask */
144 TRUE), /* pcrel_offset */
145
146 HOWTO (R_VAX_PC8, /* type */
147 0, /* rightshift */
148 0, /* size (0 = byte, 1 = short, 2 = long) */
149 8, /* bitsize */
150 TRUE, /* pc_relative */
151 0, /* bitpos */
152 complain_overflow_signed, /* complain_on_overflow */
153 bfd_elf_generic_reloc, /* special_function */
154 "R_VAX_PC8", /* name */
155 FALSE, /* partial_inplace */
156 0, /* src_mask */
157 0x000000ff, /* dst_mask */
158 TRUE), /* pcrel_offset */
159
160 HOWTO (R_VAX_GOT32, /* type */
161 0, /* rightshift */
162 2, /* size (0 = byte, 1 = short, 2 = long) */
163 32, /* bitsize */
164 TRUE, /* pc_relative */
165 0, /* bitpos */
166 complain_overflow_bitfield, /* complain_on_overflow */
167 bfd_elf_generic_reloc, /* special_function */
168 "R_VAX_GOT32", /* name */
169 FALSE, /* partial_inplace */
170 0, /* src_mask */
171 0xffffffff, /* dst_mask */
172 TRUE), /* pcrel_offset */
173
174 EMPTY_HOWTO (-1),
175 EMPTY_HOWTO (-1),
176 EMPTY_HOWTO (-1),
177 EMPTY_HOWTO (-1),
178 EMPTY_HOWTO (-1),
179
180 HOWTO (R_VAX_PLT32, /* type */
181 0, /* rightshift */
182 2, /* size (0 = byte, 1 = short, 2 = long) */
183 32, /* bitsize */
184 TRUE, /* pc_relative */
185 0, /* bitpos */
186 complain_overflow_bitfield, /* complain_on_overflow */
187 bfd_elf_generic_reloc, /* special_function */
188 "R_VAX_PLT32", /* name */
189 FALSE, /* partial_inplace */
190 0, /* src_mask */
191 0xffffffff, /* dst_mask */
192 TRUE), /* pcrel_offset */
193
194 EMPTY_HOWTO (-1),
195 EMPTY_HOWTO (-1),
196 EMPTY_HOWTO (-1),
197 EMPTY_HOWTO (-1),
198 EMPTY_HOWTO (-1),
199
200 HOWTO (R_VAX_COPY, /* type */
201 0, /* rightshift */
202 0, /* size (0 = byte, 1 = short, 2 = long) */
203 0, /* bitsize */
204 FALSE, /* pc_relative */
205 0, /* bitpos */
206 complain_overflow_dont, /* complain_on_overflow */
207 bfd_elf_generic_reloc, /* special_function */
208 "R_VAX_COPY", /* name */
209 FALSE, /* partial_inplace */
210 0, /* src_mask */
211 0xffffffff, /* dst_mask */
212 FALSE), /* pcrel_offset */
213
214 HOWTO (R_VAX_GLOB_DAT, /* type */
215 0, /* rightshift */
216 2, /* size (0 = byte, 1 = short, 2 = long) */
217 32, /* bitsize */
218 FALSE, /* pc_relative */
219 0, /* bitpos */
220 complain_overflow_dont, /* complain_on_overflow */
221 bfd_elf_generic_reloc, /* special_function */
222 "R_VAX_GLOB_DAT", /* name */
223 FALSE, /* partial_inplace */
224 0, /* src_mask */
225 0xffffffff, /* dst_mask */
226 FALSE), /* pcrel_offset */
227
228 HOWTO (R_VAX_JMP_SLOT, /* type */
229 0, /* rightshift */
230 2, /* size (0 = byte, 1 = short, 2 = long) */
231 32, /* bitsize */
232 FALSE, /* pc_relative */
233 0, /* bitpos */
234 complain_overflow_dont, /* complain_on_overflow */
235 bfd_elf_generic_reloc, /* special_function */
236 "R_VAX_JMP_SLOT", /* name */
237 FALSE, /* partial_inplace */
238 0, /* src_mask */
239 0xffffffff, /* dst_mask */
240 FALSE), /* pcrel_offset */
241
242 HOWTO (R_VAX_RELATIVE, /* type */
243 0, /* rightshift */
244 2, /* size (0 = byte, 1 = short, 2 = long) */
245 32, /* bitsize */
246 FALSE, /* pc_relative */
247 0, /* bitpos */
248 complain_overflow_dont, /* complain_on_overflow */
249 bfd_elf_generic_reloc, /* special_function */
250 "R_VAX_RELATIVE", /* name */
251 FALSE, /* partial_inplace */
252 0, /* src_mask */
253 0xffffffff, /* dst_mask */
254 FALSE), /* pcrel_offset */
255
256 /* GNU extension to record C++ vtable hierarchy */
257 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
258 0, /* rightshift */
259 2, /* size (0 = byte, 1 = short, 2 = long) */
260 0, /* bitsize */
261 FALSE, /* pc_relative */
262 0, /* bitpos */
263 complain_overflow_dont, /* complain_on_overflow */
264 NULL, /* special_function */
265 "R_VAX_GNU_VTINHERIT", /* name */
266 FALSE, /* partial_inplace */
267 0, /* src_mask */
268 0, /* dst_mask */
269 FALSE), /* pcrel_offset */
270
271 /* GNU extension to record C++ vtable member usage */
272 HOWTO (R_VAX_GNU_VTENTRY, /* type */
273 0, /* rightshift */
274 2, /* size (0 = byte, 1 = short, 2 = long) */
275 0, /* bitsize */
276 FALSE, /* pc_relative */
277 0, /* bitpos */
278 complain_overflow_dont, /* complain_on_overflow */
279 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
280 "R_VAX_GNU_VTENTRY", /* name */
281 FALSE, /* partial_inplace */
282 0, /* src_mask */
283 0, /* dst_mask */
284 FALSE), /* pcrel_offset */
285 };
286
287 static void
288 rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
289 Elf_Internal_Rela *dst)
290 {
291 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
292 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
293 }
294
295 #define elf_info_to_howto rtype_to_howto
296
297 static const struct
298 {
299 bfd_reloc_code_real_type bfd_val;
300 int elf_val;
301 } reloc_map[] = {
302 { BFD_RELOC_NONE, R_VAX_NONE },
303 { BFD_RELOC_32, R_VAX_32 },
304 { BFD_RELOC_16, R_VAX_16 },
305 { BFD_RELOC_8, R_VAX_8 },
306 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
307 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
308 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
309 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
310 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
311 { BFD_RELOC_NONE, R_VAX_COPY },
312 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
313 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
314 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
315 { BFD_RELOC_CTOR, R_VAX_32 },
316 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
317 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
318 };
319
320 static reloc_howto_type *
321 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
322 {
323 unsigned int i;
324 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
325 {
326 if (reloc_map[i].bfd_val == code)
327 return &howto_table[reloc_map[i].elf_val];
328 }
329 return 0;
330 }
331
332 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
333 #define ELF_ARCH bfd_arch_vax
334 /* end code generated by elf.el */
335 \f
336 /* Functions for the VAX ELF linker. */
337
338 /* The name of the dynamic interpreter. This is put in the .interp
339 section. */
340
341 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
342
343 /* The size in bytes of an entry in the procedure linkage table. */
344
345 #define PLT_ENTRY_SIZE 12
346
347 /* The first entry in a procedure linkage table looks like this. See
348 the SVR4 ABI VAX supplement to see how this works. */
349
350 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
351 {
352 0xdd, 0xef, /* pushl l^ */
353 0, 0, 0, 0, /* offset to .plt.got + 4 */
354 0x17, 0xff, /* jmp @L^(pc) */
355 0, 0, 0, 0, /* offset to .plt.got + 8 */
356 };
357
358 /* Subsequent entries in a procedure linkage table look like this. */
359
360 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
361 {
362 0x40, 0x00, /* .word ^M<r6> */
363 0x16, 0xef, /* jsb L^(pc) */
364 0, 0, 0, 0, /* replaced with offset to start of .plt */
365 0, 0, 0, 0, /* index into .rela.plt */
366 };
367
368 /* The VAX linker needs to keep track of the number of relocs that it
369 decides to copy in check_relocs for each symbol. This is so that it
370 can discard PC relative relocs if it doesn't need them when linking
371 with -Bsymbolic. We store the information in a field extending the
372 regular ELF linker hash table. */
373
374 /* This structure keeps track of the number of PC relative relocs we have
375 copied for a given symbol. */
376
377 struct elf_vax_pcrel_relocs_copied
378 {
379 /* Next section. */
380 struct elf_vax_pcrel_relocs_copied *next;
381 /* A section in dynobj. */
382 asection *section;
383 /* Number of relocs copied in this section. */
384 bfd_size_type count;
385 };
386
387 /* VAX ELF linker hash entry. */
388
389 struct elf_vax_link_hash_entry
390 {
391 struct elf_link_hash_entry root;
392
393 /* Number of PC relative relocs copied for this symbol. */
394 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
395
396 bfd_vma got_addend;
397 };
398
399 /* VAX ELF linker hash table. */
400
401 struct elf_vax_link_hash_table
402 {
403 struct elf_link_hash_table root;
404 };
405
406 /* Declare this now that the above structures are defined. */
407
408 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
409 PTR);
410
411 /* Declare this now that the above structures are defined. */
412
413 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
414 PTR);
415
416 /* Traverse an VAX ELF linker hash table. */
417
418 #define elf_vax_link_hash_traverse(table, func, info) \
419 (elf_link_hash_traverse \
420 (&(table)->root, \
421 (bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \
422 (info)))
423
424 /* Get the VAX ELF linker hash table from a link_info structure. */
425
426 #define elf_vax_hash_table(p) ((struct elf_vax_link_hash_table *) (p)->hash)
427
428 /* Create an entry in an VAX ELF linker hash table. */
429
430 static struct bfd_hash_entry *
431 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
432 struct bfd_hash_table *table,
433 const char *string)
434 {
435 struct elf_vax_link_hash_entry *ret =
436 (struct elf_vax_link_hash_entry *) entry;
437
438 /* Allocate the structure if it has not already been allocated by a
439 subclass. */
440 if (ret == NULL)
441 ret = ((struct elf_vax_link_hash_entry *)
442 bfd_hash_allocate (table,
443 sizeof (struct elf_vax_link_hash_entry)));
444 if (ret == NULL)
445 return (struct bfd_hash_entry *) ret;
446
447 /* Call the allocation method of the superclass. */
448 ret = ((struct elf_vax_link_hash_entry *)
449 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
450 table, string));
451 if (ret != NULL)
452 {
453 ret->pcrel_relocs_copied = NULL;
454 }
455
456 return (struct bfd_hash_entry *) ret;
457 }
458
459 /* Create an VAX ELF linker hash table. */
460
461 static struct bfd_link_hash_table *
462 elf_vax_link_hash_table_create (bfd *abfd)
463 {
464 struct elf_vax_link_hash_table *ret;
465 bfd_size_type amt = sizeof (struct elf_vax_link_hash_table);
466
467 ret = bfd_malloc (amt);
468 if (ret == NULL)
469 return NULL;
470
471 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
472 elf_vax_link_hash_newfunc,
473 sizeof (struct elf_vax_link_hash_entry)))
474 {
475 free (ret);
476 return NULL;
477 }
478
479 return &ret->root.root;
480 }
481
482 /* Keep vax-specific flags in the ELF header */
483 static bfd_boolean
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
494 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
495 {
496 flagword out_flags;
497 flagword in_flags;
498
499 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
500 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
501 return TRUE;
502
503 in_flags = elf_elfheader (ibfd)->e_flags;
504 out_flags = elf_elfheader (obfd)->e_flags;
505
506 if (!elf_flags_init (obfd))
507 {
508 elf_flags_init (obfd) = TRUE;
509 elf_elfheader (obfd)->e_flags = in_flags;
510 }
511
512 return TRUE;
513 }
514
515 /* Display the flags field */
516 static bfd_boolean
517 elf32_vax_print_private_bfd_data (bfd *abfd, PTR ptr)
518 {
519 FILE *file = (FILE *) ptr;
520
521 BFD_ASSERT (abfd != NULL && ptr != NULL);
522
523 /* Print normal ELF private data. */
524 _bfd_elf_print_private_bfd_data (abfd, ptr);
525
526 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
527
528 /* xgettext:c-format */
529 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
530
531 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
532 fprintf (file, _(" [nonpic]"));
533
534 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
535 fprintf (file, _(" [d-float]"));
536
537 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
538 fprintf (file, _(" [g-float]"));
539
540 fputc ('\n', file);
541
542 return TRUE;
543 }
544 /* Look through the relocs for a section during the first phase, and
545 allocate space in the global offset table or procedure linkage
546 table. */
547
548 static bfd_boolean
549 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
550 const Elf_Internal_Rela *relocs)
551 {
552 bfd *dynobj;
553 Elf_Internal_Shdr *symtab_hdr;
554 struct elf_link_hash_entry **sym_hashes;
555 const Elf_Internal_Rela *rel;
556 const Elf_Internal_Rela *rel_end;
557 asection *sgot;
558 asection *srelgot;
559 asection *sreloc;
560
561 if (info->relocatable)
562 return TRUE;
563
564 dynobj = elf_hash_table (info)->dynobj;
565 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
566 sym_hashes = elf_sym_hashes (abfd);
567
568 sgot = NULL;
569 srelgot = NULL;
570 sreloc = NULL;
571
572 rel_end = relocs + sec->reloc_count;
573 for (rel = relocs; rel < rel_end; rel++)
574 {
575 unsigned long r_symndx;
576 struct elf_link_hash_entry *h;
577
578 r_symndx = ELF32_R_SYM (rel->r_info);
579
580 if (r_symndx < symtab_hdr->sh_info)
581 h = NULL;
582 else
583 {
584 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
585 while (h->root.type == bfd_link_hash_indirect
586 || h->root.type == bfd_link_hash_warning)
587 h = (struct elf_link_hash_entry *) h->root.u.i.link;
588 }
589
590 switch (ELF32_R_TYPE (rel->r_info))
591 {
592 case R_VAX_GOT32:
593 if (h != NULL
594 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
595 break;
596
597 /* This symbol requires a global offset table entry. */
598
599 if (dynobj == NULL)
600 {
601 /* Create the .got section. */
602 elf_hash_table (info)->dynobj = dynobj = abfd;
603 if (!_bfd_elf_create_got_section (dynobj, info))
604 return FALSE;
605 }
606
607 if (sgot == NULL)
608 {
609 sgot = bfd_get_section_by_name (dynobj, ".got");
610 BFD_ASSERT (sgot != NULL);
611 }
612
613 if (srelgot == NULL
614 && (h != NULL || info->shared))
615 {
616 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
617 if (srelgot == NULL)
618 {
619 srelgot = bfd_make_section_with_flags (dynobj,
620 ".rela.got",
621 (SEC_ALLOC
622 | SEC_LOAD
623 | SEC_HAS_CONTENTS
624 | SEC_IN_MEMORY
625 | SEC_LINKER_CREATED
626 | SEC_READONLY));
627 if (srelgot == NULL
628 || !bfd_set_section_alignment (dynobj, srelgot, 2))
629 return FALSE;
630 }
631 }
632
633 if (h != NULL)
634 {
635 struct elf_vax_link_hash_entry *eh;
636
637 eh = (struct elf_vax_link_hash_entry *) h;
638 if (h->got.refcount == -1)
639 {
640 h->got.refcount = 1;
641 eh->got_addend = rel->r_addend;
642 }
643 else
644 {
645 h->got.refcount++;
646 if (eh->got_addend != (bfd_vma) rel->r_addend)
647 (*_bfd_error_handler)
648 (_("%s: warning: GOT addend of %ld to `%s' does not match previous GOT addend of %ld"),
649 bfd_get_filename (abfd), rel->r_addend,
650 h->root.root.string,
651 eh->got_addend);
652
653 }
654 }
655 break;
656
657 case R_VAX_PLT32:
658 /* This symbol requires a procedure linkage table entry. We
659 actually build the entry in adjust_dynamic_symbol,
660 because this might be a case of linking PIC code which is
661 never referenced by a dynamic object, in which case we
662 don't need to generate a procedure linkage table entry
663 after all. */
664
665 /* If this is a local symbol, we resolve it directly without
666 creating a procedure linkage table entry. */
667 if (h == NULL)
668 continue;
669
670 h->needs_plt = 1;
671 if (h->plt.refcount == -1)
672 h->plt.refcount = 1;
673 else
674 h->plt.refcount++;
675 break;
676
677 case R_VAX_PC8:
678 case R_VAX_PC16:
679 case R_VAX_PC32:
680 /* If we are creating a shared library and this is not a local
681 symbol, we need to copy the reloc into the shared library.
682 However when linking with -Bsymbolic and this is a global
683 symbol which is defined in an object we are including in the
684 link (i.e., DEF_REGULAR is set), then we can resolve the
685 reloc directly. At this point we have not seen all the input
686 files, so it is possible that DEF_REGULAR is not set now but
687 will be set later (it is never cleared). We account for that
688 possibility below by storing information in the
689 pcrel_relocs_copied field of the hash table entry. */
690 if (!(info->shared
691 && (sec->flags & SEC_ALLOC) != 0
692 && h != NULL
693 && (!info->symbolic
694 || !h->def_regular)))
695 {
696 if (h != NULL)
697 {
698 /* Make sure a plt entry is created for this symbol if
699 it turns out to be a function defined by a dynamic
700 object. */
701 if (h->plt.refcount == -1)
702 h->plt.refcount = 1;
703 else
704 h->plt.refcount++;
705 }
706 break;
707 }
708 /* Fall through. */
709 case R_VAX_8:
710 case R_VAX_16:
711 case R_VAX_32:
712 if (h != NULL)
713 {
714 /* Make sure a plt entry is created for this symbol if it
715 turns out to be a function defined by a dynamic object. */
716 if (h->plt.refcount == -1)
717 h->plt.refcount = 1;
718 else
719 h->plt.refcount++;
720 }
721
722 /* If we are creating a shared library, we need to copy the
723 reloc into the shared library. */
724 if (info->shared
725 && (sec->flags & SEC_ALLOC) != 0)
726 {
727 /* When creating a shared object, we must copy these
728 reloc types into the output file. We create a reloc
729 section in dynobj and make room for this reloc. */
730 if (sreloc == NULL)
731 {
732 const char *name;
733
734 name = (bfd_elf_string_from_elf_section
735 (abfd,
736 elf_elfheader (abfd)->e_shstrndx,
737 elf_section_data (sec)->rel_hdr.sh_name));
738 if (name == NULL)
739 return FALSE;
740
741 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
742 && strcmp (bfd_get_section_name (abfd, sec),
743 name + 5) == 0);
744
745 sreloc = bfd_get_section_by_name (dynobj, name);
746 if (sreloc == NULL)
747 {
748 sreloc = bfd_make_section_with_flags (dynobj,
749 name,
750 (SEC_ALLOC
751 | SEC_LOAD
752 | SEC_HAS_CONTENTS
753 | SEC_IN_MEMORY
754 | SEC_LINKER_CREATED
755 | SEC_READONLY));
756 if (sreloc == NULL
757 || !bfd_set_section_alignment (dynobj, sreloc, 2))
758 return FALSE;
759 }
760 if (sec->flags & SEC_READONLY)
761 info->flags |= DF_TEXTREL;
762 }
763
764 sreloc->size += sizeof (Elf32_External_Rela);
765
766 /* If we are linking with -Bsymbolic, we count the number of
767 PC relative relocations we have entered for this symbol,
768 so that we can discard them again if the symbol is later
769 defined by a regular object. Note that this function is
770 only called if we are using a vaxelf linker hash table,
771 which means that h is really a pointer to an
772 elf_vax_link_hash_entry. */
773 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
774 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
775 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
776 && info->symbolic)
777 {
778 struct elf_vax_link_hash_entry *eh;
779 struct elf_vax_pcrel_relocs_copied *p;
780
781 eh = (struct elf_vax_link_hash_entry *) h;
782
783 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
784 if (p->section == sreloc)
785 break;
786
787 if (p == NULL)
788 {
789 p = ((struct elf_vax_pcrel_relocs_copied *)
790 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
791 if (p == NULL)
792 return FALSE;
793 p->next = eh->pcrel_relocs_copied;
794 eh->pcrel_relocs_copied = p;
795 p->section = sreloc;
796 p->count = 0;
797 }
798
799 ++p->count;
800 }
801 }
802
803 break;
804
805 /* This relocation describes the C++ object vtable hierarchy.
806 Reconstruct it for later use during GC. */
807 case R_VAX_GNU_VTINHERIT:
808 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
809 return FALSE;
810 break;
811
812 /* This relocation describes which C++ vtable entries are actually
813 used. Record for later use during GC. */
814 case R_VAX_GNU_VTENTRY:
815 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
816 return FALSE;
817 break;
818
819 default:
820 break;
821 }
822 }
823
824 return TRUE;
825 }
826
827 /* Return the section that should be marked against GC for a given
828 relocation. */
829
830 static asection *
831 elf_vax_gc_mark_hook (asection *sec,
832 struct bfd_link_info *info ATTRIBUTE_UNUSED,
833 Elf_Internal_Rela *rel,
834 struct elf_link_hash_entry *h,
835 Elf_Internal_Sym *sym)
836 {
837 if (h != NULL)
838 {
839 switch (ELF32_R_TYPE (rel->r_info))
840 {
841 case R_VAX_GNU_VTINHERIT:
842 case R_VAX_GNU_VTENTRY:
843 break;
844
845 default:
846 switch (h->root.type)
847 {
848 default:
849 break;
850
851 case bfd_link_hash_defined:
852 case bfd_link_hash_defweak:
853 return h->root.u.def.section;
854
855 case bfd_link_hash_common:
856 return h->root.u.c.p->section;
857 }
858 }
859 }
860 else
861 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
862
863 return NULL;
864 }
865
866 /* Update the got entry reference counts for the section being removed. */
867
868 static bfd_boolean
869 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
870 const Elf_Internal_Rela *relocs)
871 {
872 Elf_Internal_Shdr *symtab_hdr;
873 struct elf_link_hash_entry **sym_hashes;
874 const Elf_Internal_Rela *rel, *relend;
875 bfd *dynobj;
876
877 dynobj = elf_hash_table (info)->dynobj;
878 if (dynobj == NULL)
879 return TRUE;
880
881 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
882 sym_hashes = elf_sym_hashes (abfd);
883
884 relend = relocs + sec->reloc_count;
885 for (rel = relocs; rel < relend; rel++)
886 {
887 unsigned long r_symndx;
888 struct elf_link_hash_entry *h = NULL;
889
890 r_symndx = ELF32_R_SYM (rel->r_info);
891 if (r_symndx >= symtab_hdr->sh_info)
892 {
893 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
894 while (h->root.type == bfd_link_hash_indirect
895 || h->root.type == bfd_link_hash_warning)
896 h = (struct elf_link_hash_entry *) h->root.u.i.link;
897 }
898
899 switch (ELF32_R_TYPE (rel->r_info))
900 {
901 case R_VAX_GOT32:
902 if (h != NULL && h->got.refcount > 0)
903 --h->got.refcount;
904 break;
905
906 case R_VAX_PLT32:
907 case R_VAX_PC8:
908 case R_VAX_PC16:
909 case R_VAX_PC32:
910 case R_VAX_8:
911 case R_VAX_16:
912 case R_VAX_32:
913 if (h != NULL && h->plt.refcount > 0)
914 --h->plt.refcount;
915 break;
916
917 default:
918 break;
919 }
920 }
921
922 return TRUE;
923 }
924
925 /* Adjust a symbol defined by a dynamic object and referenced by a
926 regular object. The current definition is in some section of the
927 dynamic object, but we're not including those sections. We have to
928 change the definition to something the rest of the link can
929 understand. */
930
931 static bfd_boolean
932 elf_vax_adjust_dynamic_symbol (info, h)
933 struct bfd_link_info *info;
934 struct elf_link_hash_entry *h;
935 {
936 bfd *dynobj;
937 asection *s;
938 unsigned int power_of_two;
939
940 dynobj = elf_hash_table (info)->dynobj;
941
942 /* Make sure we know what is going on here. */
943 BFD_ASSERT (dynobj != NULL
944 && (h->needs_plt
945 || h->u.weakdef != NULL
946 || (h->def_dynamic
947 && h->ref_regular
948 && !h->def_regular)));
949
950 /* If this is a function, put it in the procedure linkage table. We
951 will fill in the contents of the procedure linkage table later,
952 when we know the address of the .got section. */
953 if (h->type == STT_FUNC
954 || h->needs_plt)
955 {
956 if (! info->shared
957 && !h->def_dynamic
958 && !h->ref_dynamic
959 /* We must always create the plt entry if it was referenced
960 by a PLTxxO relocation. In this case we already recorded
961 it as a dynamic symbol. */
962 && h->dynindx == -1)
963 {
964 /* This case can occur if we saw a PLTxx reloc in an input
965 file, but the symbol was never referred to by a dynamic
966 object. In such a case, we don't actually need to build
967 a procedure linkage table, and we can just do a PCxx
968 reloc instead. */
969 BFD_ASSERT (h->needs_plt);
970 h->plt.offset = (bfd_vma) -1;
971 return TRUE;
972 }
973
974 /* GC may have rendered this entry unused. */
975 if (h->plt.refcount <= 0)
976 {
977 h->needs_plt = 0;
978 h->plt.offset = (bfd_vma) -1;
979 return TRUE;
980 }
981
982 /* Make sure this symbol is output as a dynamic symbol. */
983 if (h->dynindx == -1)
984 {
985 if (! bfd_elf_link_record_dynamic_symbol (info, h))
986 return FALSE;
987 }
988
989 s = bfd_get_section_by_name (dynobj, ".plt");
990 BFD_ASSERT (s != NULL);
991
992 /* If this is the first .plt entry, make room for the special
993 first entry. */
994 if (s->size == 0)
995 {
996 s->size += PLT_ENTRY_SIZE;
997 }
998
999 /* If this symbol is not defined in a regular file, and we are
1000 not generating a shared library, then set the symbol to this
1001 location in the .plt. This is required to make function
1002 pointers compare as equal between the normal executable and
1003 the shared library. */
1004 if (!info->shared
1005 && !h->def_regular)
1006 {
1007 h->root.u.def.section = s;
1008 h->root.u.def.value = s->size;
1009 }
1010
1011 h->plt.offset = s->size;
1012
1013 /* Make room for this entry. */
1014 s->size += PLT_ENTRY_SIZE;
1015
1016 /* We also need to make an entry in the .got.plt section, which
1017 will be placed in the .got section by the linker script. */
1018
1019 s = bfd_get_section_by_name (dynobj, ".got.plt");
1020 BFD_ASSERT (s != NULL);
1021 s->size += 4;
1022
1023 /* We also need to make an entry in the .rela.plt section. */
1024
1025 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1026 BFD_ASSERT (s != NULL);
1027 s->size += sizeof (Elf32_External_Rela);
1028
1029 return TRUE;
1030 }
1031
1032 /* Reinitialize the plt offset now that it is not used as a reference
1033 count any more. */
1034 h->plt.offset = (bfd_vma) -1;
1035
1036 /* If this is a weak symbol, and there is a real definition, the
1037 processor independent code will have arranged for us to see the
1038 real definition first, and we can just use the same value. */
1039 if (h->u.weakdef != NULL)
1040 {
1041 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1042 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1043 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1044 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1045 return TRUE;
1046 }
1047
1048 /* This is a reference to a symbol defined by a dynamic object which
1049 is not a function. */
1050
1051 /* If we are creating a shared library, we must presume that the
1052 only references to the symbol are via the global offset table.
1053 For such cases we need not do anything here; the relocations will
1054 be handled correctly by relocate_section. */
1055 if (info->shared)
1056 return TRUE;
1057
1058 if (h->size == 0)
1059 {
1060 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1061 h->root.root.string);
1062 return TRUE;
1063 }
1064
1065 /* We must allocate the symbol in our .dynbss section, which will
1066 become part of the .bss section of the executable. There will be
1067 an entry for this symbol in the .dynsym section. The dynamic
1068 object will contain position independent code, so all references
1069 from the dynamic object to this symbol will go through the global
1070 offset table. The dynamic linker will use the .dynsym entry to
1071 determine the address it must put in the global offset table, so
1072 both the dynamic object and the regular object will refer to the
1073 same memory location for the variable. */
1074
1075 s = bfd_get_section_by_name (dynobj, ".dynbss");
1076 BFD_ASSERT (s != NULL);
1077
1078 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1079 copy the initial value out of the dynamic object and into the
1080 runtime process image. We need to remember the offset into the
1081 .rela.bss section we are going to use. */
1082 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1083 {
1084 asection *srel;
1085
1086 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1087 BFD_ASSERT (srel != NULL);
1088 srel->size += sizeof (Elf32_External_Rela);
1089 h->needs_copy = 1;
1090 }
1091
1092 /* We need to figure out the alignment required for this symbol. I
1093 have no idea how ELF linkers handle this. */
1094 power_of_two = bfd_log2 (h->size);
1095 if (power_of_two > 3)
1096 power_of_two = 3;
1097
1098 /* Apply the required alignment. */
1099 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1100 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1101 {
1102 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
1103 return FALSE;
1104 }
1105
1106 /* Define the symbol as being at this point in the section. */
1107 h->root.u.def.section = s;
1108 h->root.u.def.value = s->size;
1109
1110 /* Increment the section size to make room for the symbol. */
1111 s->size += h->size;
1112
1113 return TRUE;
1114 }
1115
1116 /* Set the sizes of the dynamic sections. */
1117
1118 static bfd_boolean
1119 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1120 {
1121 bfd *dynobj;
1122 asection *s;
1123 bfd_boolean plt;
1124 bfd_boolean relocs;
1125 bfd_boolean reltext;
1126
1127 dynobj = elf_hash_table (info)->dynobj;
1128 BFD_ASSERT (dynobj != NULL);
1129
1130 if (elf_hash_table (info)->dynamic_sections_created)
1131 {
1132 /* Set the contents of the .interp section to the interpreter. */
1133 if (info->executable)
1134 {
1135 s = bfd_get_section_by_name (dynobj, ".interp");
1136 BFD_ASSERT (s != NULL);
1137 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1138 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1139 }
1140 }
1141 else
1142 {
1143 /* We may have created entries in the .rela.got and .got sections.
1144 However, if we are not creating the dynamic sections, we will
1145 not actually use these entries. Reset the size of .rela.got
1146 and .got, which will cause it to get stripped from the output
1147 file below. */
1148 s = bfd_get_section_by_name (dynobj, ".rela.got");
1149 if (s != NULL)
1150 s->size = 0;
1151 s = bfd_get_section_by_name (dynobj, ".got.plt");
1152 if (s != NULL)
1153 s->size = 0;
1154 s = bfd_get_section_by_name (dynobj, ".got");
1155 if (s != NULL)
1156 s->size = 0;
1157 }
1158
1159 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1160 relative relocs against symbols defined in a regular object. We
1161 allocated space for them in the check_relocs routine, but we will not
1162 fill them in in the relocate_section routine. */
1163 if (info->shared && info->symbolic)
1164 elf_vax_link_hash_traverse (elf_vax_hash_table (info),
1165 elf_vax_discard_copies,
1166 NULL);
1167
1168 /* If this is a -Bsymbolic shared link or a static link, we need to
1169 discard all the got entries we've recorded. Otherwise, we need to
1170 instantiate (allocate space for them). */
1171 elf_link_hash_traverse (elf_hash_table (info),
1172 elf_vax_instantiate_got_entries,
1173 (PTR) info);
1174
1175 /* The check_relocs and adjust_dynamic_symbol entry points have
1176 determined the sizes of the various dynamic sections. Allocate
1177 memory for them. */
1178 plt = FALSE;
1179 relocs = FALSE;
1180 reltext = FALSE;
1181 for (s = dynobj->sections; s != NULL; s = s->next)
1182 {
1183 const char *name;
1184
1185 if ((s->flags & SEC_LINKER_CREATED) == 0)
1186 continue;
1187
1188 /* It's OK to base decisions on the section name, because none
1189 of the dynobj section names depend upon the input files. */
1190 name = bfd_get_section_name (dynobj, s);
1191
1192 if (strcmp (name, ".plt") == 0)
1193 {
1194 /* Remember whether there is a PLT. */
1195 plt = s->size != 0;
1196 }
1197 else if (strncmp (name, ".rela", 5) == 0)
1198 {
1199 if (s->size != 0)
1200 {
1201 asection *target;
1202
1203 /* Remember whether there are any reloc sections other
1204 than .rela.plt. */
1205 if (strcmp (name, ".rela.plt") != 0)
1206 {
1207 const char *outname;
1208
1209 relocs = TRUE;
1210
1211 /* If this relocation section applies to a read only
1212 section, then we probably need a DT_TEXTREL
1213 entry. .rela.plt is actually associated with
1214 .got.plt, which is never readonly. */
1215 outname = bfd_get_section_name (output_bfd,
1216 s->output_section);
1217 target = bfd_get_section_by_name (output_bfd, outname + 5);
1218 if (target != NULL
1219 && (target->flags & SEC_READONLY) != 0
1220 && (target->flags & SEC_ALLOC) != 0)
1221 reltext = TRUE;
1222 }
1223
1224 /* We use the reloc_count field as a counter if we need
1225 to copy relocs into the output file. */
1226 s->reloc_count = 0;
1227 }
1228 }
1229 else if (strncmp (name, ".got", 4) != 0
1230 && strcmp (name, ".dynbss") != 0)
1231 {
1232 /* It's not one of our sections, so don't allocate space. */
1233 continue;
1234 }
1235
1236 if (s->size == 0)
1237 {
1238 /* If we don't need this section, strip it from the
1239 output file. This is mostly to handle .rela.bss and
1240 .rela.plt. We must create both sections in
1241 create_dynamic_sections, because they must be created
1242 before the linker maps input sections to output
1243 sections. The linker does that before
1244 adjust_dynamic_symbol is called, and it is that
1245 function which decides whether anything needs to go
1246 into these sections. */
1247 s->flags |= SEC_EXCLUDE;
1248 continue;
1249 }
1250
1251 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1252 continue;
1253
1254 /* Allocate memory for the section contents. */
1255 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1256 if (s->contents == NULL)
1257 return FALSE;
1258 }
1259
1260 if (elf_hash_table (info)->dynamic_sections_created)
1261 {
1262 /* Add some entries to the .dynamic section. We fill in the
1263 values later, in elf_vax_finish_dynamic_sections, but we
1264 must add the entries now so that we get the correct size for
1265 the .dynamic section. The DT_DEBUG entry is filled in by the
1266 dynamic linker and used by the debugger. */
1267 #define add_dynamic_entry(TAG, VAL) \
1268 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1269
1270 if (!info->shared)
1271 {
1272 if (!add_dynamic_entry (DT_DEBUG, 0))
1273 return FALSE;
1274 }
1275
1276 if (plt)
1277 {
1278 if (!add_dynamic_entry (DT_PLTGOT, 0)
1279 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1280 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1281 || !add_dynamic_entry (DT_JMPREL, 0))
1282 return FALSE;
1283 }
1284
1285 if (relocs)
1286 {
1287 if (!add_dynamic_entry (DT_RELA, 0)
1288 || !add_dynamic_entry (DT_RELASZ, 0)
1289 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1290 return FALSE;
1291 }
1292
1293 if (reltext || (info->flags & DF_TEXTREL) != 0)
1294 {
1295 if (!add_dynamic_entry (DT_TEXTREL, 0))
1296 return FALSE;
1297 }
1298 }
1299 #undef add_dynamic_entry
1300
1301 return TRUE;
1302 }
1303
1304 /* This function is called via elf_vax_link_hash_traverse if we are
1305 creating a shared object with -Bsymbolic. It discards the space
1306 allocated to copy PC relative relocs against symbols which are defined
1307 in regular objects. We allocated space for them in the check_relocs
1308 routine, but we won't fill them in in the relocate_section routine. */
1309
1310 static bfd_boolean
1311 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1312 PTR ignore ATTRIBUTE_UNUSED)
1313 {
1314 struct elf_vax_pcrel_relocs_copied *s;
1315
1316 if (h->root.root.type == bfd_link_hash_warning)
1317 h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
1318
1319 /* We only discard relocs for symbols defined in a regular object. */
1320 if (!h->root.def_regular)
1321 return TRUE;
1322
1323 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1324 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1325
1326 return TRUE;
1327 }
1328
1329 /* This function is called via elf_link_hash_traverse. It looks for entries
1330 that have GOT or PLT (.GOT) references. If creating a static object or a
1331 shared object with -Bsymbolic, it resets the reference count back to 0
1332 and sets the offset to -1 so normal PC32 relocation will be done. If
1333 creating a shared object or executable, space in the .got and .rela.got
1334 will be reserved for the symbol. */
1335
1336 static bfd_boolean
1337 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, PTR infoptr)
1338 {
1339 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1340 bfd *dynobj;
1341 asection *sgot;
1342 asection *srelgot;
1343
1344 /* We don't care about non-GOT (and non-PLT) entries. */
1345 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1346 return TRUE;
1347
1348 dynobj = elf_hash_table (info)->dynobj;
1349 if (dynobj == NULL)
1350 return TRUE;
1351
1352 sgot = bfd_get_section_by_name (dynobj, ".got");
1353 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1354
1355 if (!elf_hash_table (info)->dynamic_sections_created
1356 || (info->shared && info->symbolic))
1357 {
1358 h->got.refcount = 0;
1359 h->got.offset = (bfd_vma) -1;
1360 h->plt.refcount = 0;
1361 h->plt.offset = (bfd_vma) -1;
1362 }
1363 else if (h->got.refcount > 0)
1364 {
1365 /* Make sure this symbol is output as a dynamic symbol. */
1366 if (h->dynindx == -1)
1367 {
1368 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1369 return FALSE;
1370 }
1371
1372 /* Allocate space in the .got and .rela.got sections. */
1373 sgot->size += 4;
1374 srelgot->size += sizeof (Elf32_External_Rela);
1375 }
1376
1377 return TRUE;
1378 }
1379
1380 /* Relocate an VAX ELF section. */
1381
1382 static bfd_boolean
1383 elf_vax_relocate_section (bfd *output_bfd,
1384 struct bfd_link_info *info,
1385 bfd *input_bfd,
1386 asection *input_section,
1387 bfd_byte *contents,
1388 Elf_Internal_Rela *relocs,
1389 Elf_Internal_Sym *local_syms,
1390 asection **local_sections)
1391 {
1392 bfd *dynobj;
1393 Elf_Internal_Shdr *symtab_hdr;
1394 struct elf_link_hash_entry **sym_hashes;
1395 bfd_vma *local_got_offsets;
1396 bfd_vma plt_index;
1397 bfd_vma got_offset;
1398 asection *sgot;
1399 asection *splt;
1400 asection *sgotplt;
1401 asection *sreloc;
1402 Elf_Internal_Rela *rel;
1403 Elf_Internal_Rela *relend;
1404
1405 if (info->relocatable)
1406 return TRUE;
1407
1408 dynobj = elf_hash_table (info)->dynobj;
1409 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1410 sym_hashes = elf_sym_hashes (input_bfd);
1411 local_got_offsets = elf_local_got_offsets (input_bfd);
1412
1413 sgot = NULL;
1414 splt = NULL;
1415 sgotplt = NULL;
1416 sreloc = NULL;
1417
1418 rel = relocs;
1419 relend = relocs + input_section->reloc_count;
1420 for (; rel < relend; rel++)
1421 {
1422 int r_type;
1423 reloc_howto_type *howto;
1424 unsigned long r_symndx;
1425 struct elf_link_hash_entry *h;
1426 Elf_Internal_Sym *sym;
1427 asection *sec;
1428 bfd_vma relocation;
1429 bfd_reloc_status_type r;
1430
1431 r_type = ELF32_R_TYPE (rel->r_info);
1432 if (r_type < 0 || r_type >= (int) R_VAX_max)
1433 {
1434 bfd_set_error (bfd_error_bad_value);
1435 return FALSE;
1436 }
1437 howto = howto_table + r_type;
1438
1439 /* This is a final link. */
1440 r_symndx = ELF32_R_SYM (rel->r_info);
1441 h = NULL;
1442 sym = NULL;
1443 sec = NULL;
1444 if (r_symndx < symtab_hdr->sh_info)
1445 {
1446 sym = local_syms + r_symndx;
1447 sec = local_sections[r_symndx];
1448 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1449 }
1450 else
1451 {
1452 bfd_boolean unresolved_reloc;
1453 bfd_boolean warned;
1454
1455 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1456 r_symndx, symtab_hdr, sym_hashes,
1457 h, sec, relocation,
1458 unresolved_reloc, warned);
1459
1460 if ((h->root.type == bfd_link_hash_defined
1461 || h->root.type == bfd_link_hash_defweak)
1462 && ((r_type == R_VAX_PLT32
1463 && h->plt.offset != (bfd_vma) -1
1464 && elf_hash_table (info)->dynamic_sections_created)
1465 || (r_type == R_VAX_GOT32
1466 && strcmp (h->root.root.string,
1467 "_GLOBAL_OFFSET_TABLE_") != 0
1468 && elf_hash_table (info)->dynamic_sections_created
1469 && (! info->shared
1470 || (! info->symbolic && h->dynindx != -1)
1471 || !h->def_regular))
1472 || (info->shared
1473 && ((! info->symbolic && h->dynindx != -1)
1474 || !h->def_regular)
1475 && ((input_section->flags & SEC_ALLOC) != 0
1476 /* DWARF will emit R_VAX_32 relocations in its
1477 sections against symbols defined externally
1478 in shared libraries. We can't do anything
1479 with them here. */
1480
1481 || ((input_section->flags & SEC_DEBUGGING) != 0
1482 && h->def_dynamic))
1483 && (r_type == R_VAX_8
1484 || r_type == R_VAX_16
1485 || r_type == R_VAX_32
1486 || r_type == R_VAX_PC8
1487 || r_type == R_VAX_PC16
1488 || r_type == R_VAX_PC32))))
1489 /* In these cases, we don't need the relocation
1490 value. We check specially because in some
1491 obscure cases sec->output_section will be NULL. */
1492 relocation = 0;
1493 }
1494
1495 switch (r_type)
1496 {
1497 case R_VAX_GOT32:
1498 /* Relocation is to the address of the entry for this symbol
1499 in the global offset table. */
1500 if (h == NULL || h->got.offset == (bfd_vma) -1)
1501 break;
1502
1503 /* Relocation is the offset of the entry for this symbol in
1504 the global offset table. */
1505
1506 {
1507 bfd_vma off;
1508
1509 if (sgot == NULL)
1510 {
1511 sgot = bfd_get_section_by_name (dynobj, ".got");
1512 BFD_ASSERT (sgot != NULL);
1513 }
1514
1515 BFD_ASSERT (h != NULL);
1516 off = h->got.offset;
1517 BFD_ASSERT (off != (bfd_vma) -1);
1518 BFD_ASSERT (off < sgot->size);
1519
1520 if (info->shared
1521 && h->dynindx == -1
1522 && h->def_regular)
1523 {
1524 /* The symbol was forced to be local
1525 because of a version file.. We must initialize
1526 this entry in the global offset table. Since
1527 the offset must always be a multiple of 4, we
1528 use the least significant bit to record whether
1529 we have initialized it already.
1530
1531 When doing a dynamic link, we create a .rela.got
1532 relocation entry to initialize the value. This
1533 is done in the finish_dynamic_symbol routine. */
1534 if ((off & 1) != 0)
1535 off &= ~1;
1536 else
1537 {
1538 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1539 sgot->contents + off);
1540 h->got.offset |= 1;
1541 }
1542 } else {
1543 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1544 }
1545
1546 relocation = sgot->output_offset + off;
1547 /* The GOT relocation uses the addend. */
1548 rel->r_addend = 0;
1549
1550 /* Change the reference to be indirect. */
1551 contents[rel->r_offset - 1] |= 0x10;
1552 relocation += sgot->output_section->vma;
1553 }
1554 break;
1555
1556 case R_VAX_PLT32:
1557 /* Relocation is to the entry for this symbol in the
1558 procedure linkage table. */
1559
1560 /* Resolve a PLTxx reloc against a local symbol directly,
1561 without using the procedure linkage table. */
1562 if (h == NULL)
1563 break;
1564
1565 if (h->plt.offset == (bfd_vma) -1
1566 || !elf_hash_table (info)->dynamic_sections_created)
1567 {
1568 /* We didn't make a PLT entry for this symbol. This
1569 happens when statically linking PIC code, or when
1570 using -Bsymbolic. */
1571 break;
1572 }
1573
1574 if (splt == NULL)
1575 {
1576 splt = bfd_get_section_by_name (dynobj, ".plt");
1577 BFD_ASSERT (splt != NULL);
1578 }
1579
1580 if (sgotplt == NULL)
1581 {
1582 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1583 BFD_ASSERT (splt != NULL);
1584 }
1585
1586 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1587
1588 /* Get the offset into the .got table of the entry that
1589 corresponds to this function. Each .got entry is 4 bytes.
1590 The first two are reserved. */
1591 got_offset = (plt_index + 3) * 4;
1592
1593 /* We want the relocate to point into the .got.plt instead
1594 of the plt itself. */
1595 relocation = (sgotplt->output_section->vma
1596 + sgotplt->output_offset
1597 + got_offset);
1598 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1599 if (rel->r_addend == 2)
1600 {
1601 h->plt.offset |= 1;
1602 }
1603 else if (rel->r_addend != 0)
1604 (*_bfd_error_handler)
1605 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1606 bfd_get_filename (input_bfd), rel->r_addend,
1607 h->root.root.string,
1608 bfd_get_section_name (input_bfd, input_section));
1609 rel->r_addend = 0;
1610
1611 break;
1612
1613 case R_VAX_PC8:
1614 case R_VAX_PC16:
1615 case R_VAX_PC32:
1616 if (h == NULL)
1617 break;
1618 /* Fall through. */
1619 case R_VAX_8:
1620 case R_VAX_16:
1621 case R_VAX_32:
1622 if (info->shared
1623 && r_symndx != 0
1624 && (input_section->flags & SEC_ALLOC) != 0
1625 && ((r_type != R_VAX_PC8
1626 && r_type != R_VAX_PC16
1627 && r_type != R_VAX_PC32)
1628 || (!info->symbolic
1629 || !h->def_regular)))
1630 {
1631 Elf_Internal_Rela outrel;
1632 bfd_byte *loc;
1633 bfd_boolean skip, relocate;
1634
1635 /* When generating a shared object, these relocations
1636 are copied into the output file to be resolved at run
1637 time. */
1638 if (sreloc == NULL)
1639 {
1640 const char *name;
1641
1642 name = (bfd_elf_string_from_elf_section
1643 (input_bfd,
1644 elf_elfheader (input_bfd)->e_shstrndx,
1645 elf_section_data (input_section)->rel_hdr.sh_name));
1646 if (name == NULL)
1647 return FALSE;
1648
1649 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1650 && strcmp (bfd_get_section_name (input_bfd,
1651 input_section),
1652 name + 5) == 0);
1653
1654 sreloc = bfd_get_section_by_name (dynobj, name);
1655 BFD_ASSERT (sreloc != NULL);
1656 }
1657
1658 skip = FALSE;
1659 relocate = FALSE;
1660
1661 outrel.r_offset =
1662 _bfd_elf_section_offset (output_bfd, info, input_section,
1663 rel->r_offset);
1664 if (outrel.r_offset == (bfd_vma) -1)
1665 skip = TRUE;
1666 if (outrel.r_offset == (bfd_vma) -2)
1667 skip = TRUE, relocate = TRUE;
1668 outrel.r_offset += (input_section->output_section->vma
1669 + input_section->output_offset);
1670
1671 if (skip)
1672 memset (&outrel, 0, sizeof outrel);
1673 /* h->dynindx may be -1 if the symbol was marked to
1674 become local. */
1675 else if (h != NULL
1676 && ((! info->symbolic && h->dynindx != -1)
1677 || !h->def_regular))
1678 {
1679 BFD_ASSERT (h->dynindx != -1);
1680 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1681 outrel.r_addend = relocation + rel->r_addend;
1682 }
1683 else
1684 {
1685 if (r_type == R_VAX_32)
1686 {
1687 relocate = TRUE;
1688 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1689 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1690 &contents[rel->r_offset]) == 0);
1691 outrel.r_addend = relocation + rel->r_addend;
1692 }
1693 else
1694 {
1695 long indx;
1696
1697 if (bfd_is_abs_section (sec))
1698 indx = 0;
1699 else if (sec == NULL || sec->owner == NULL)
1700 {
1701 bfd_set_error (bfd_error_bad_value);
1702 return FALSE;
1703 }
1704 else
1705 {
1706 asection *osec;
1707
1708 osec = sec->output_section;
1709 indx = elf_section_data (osec)->dynindx;
1710 BFD_ASSERT (indx > 0);
1711 }
1712
1713 outrel.r_info = ELF32_R_INFO (indx, r_type);
1714 outrel.r_addend = relocation + rel->r_addend;
1715 }
1716 }
1717
1718 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1719 ".text") != 0 ||
1720 (info->shared
1721 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1722 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1723 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1724 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1725 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1726 {
1727 if (h != NULL)
1728 (*_bfd_error_handler)
1729 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1730 bfd_get_filename (input_bfd), howto->name,
1731 h->root.root.string,
1732 bfd_get_section_name (input_bfd, input_section));
1733 else
1734 (*_bfd_error_handler)
1735 (_("%s: warning: %s relocation to 0x%x from %s section"),
1736 bfd_get_filename (input_bfd), howto->name,
1737 outrel.r_addend,
1738 bfd_get_section_name (input_bfd, input_section));
1739 }
1740 loc = sreloc->contents;
1741 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1742 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1743
1744 /* This reloc will be computed at runtime, so there's no
1745 need to do anything now, except for R_VAX_32
1746 relocations that have been turned into
1747 R_VAX_RELATIVE. */
1748 if (!relocate)
1749 continue;
1750 }
1751
1752 break;
1753
1754 case R_VAX_GNU_VTINHERIT:
1755 case R_VAX_GNU_VTENTRY:
1756 /* These are no-ops in the end. */
1757 continue;
1758
1759 default:
1760 break;
1761 }
1762
1763 /* VAX PCREL relocations are from the end of relocation, not the start.
1764 So subtract the difference from the relocation amount since we can't
1765 add it to the offset. */
1766 if (howto->pc_relative && howto->pcrel_offset)
1767 relocation -= bfd_get_reloc_size(howto);
1768
1769 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1770 contents, rel->r_offset,
1771 relocation, rel->r_addend);
1772
1773 if (r != bfd_reloc_ok)
1774 {
1775 switch (r)
1776 {
1777 default:
1778 case bfd_reloc_outofrange:
1779 abort ();
1780 case bfd_reloc_overflow:
1781 {
1782 const char *name;
1783
1784 if (h != NULL)
1785 name = NULL;
1786 else
1787 {
1788 name = bfd_elf_string_from_elf_section (input_bfd,
1789 symtab_hdr->sh_link,
1790 sym->st_name);
1791 if (name == NULL)
1792 return FALSE;
1793 if (*name == '\0')
1794 name = bfd_section_name (input_bfd, sec);
1795 }
1796 if (!(info->callbacks->reloc_overflow
1797 (info, (h ? &h->root : NULL), name, howto->name,
1798 (bfd_vma) 0, input_bfd, input_section,
1799 rel->r_offset)))
1800 return FALSE;
1801 }
1802 break;
1803 }
1804 }
1805 }
1806
1807 return TRUE;
1808 }
1809
1810 /* Finish up dynamic symbol handling. We set the contents of various
1811 dynamic sections here. */
1812
1813 static bfd_boolean
1814 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1815 struct elf_link_hash_entry *h,
1816 Elf_Internal_Sym *sym)
1817 {
1818 bfd *dynobj;
1819
1820 dynobj = elf_hash_table (info)->dynobj;
1821
1822 if (h->plt.offset != (bfd_vma) -1)
1823 {
1824 asection *splt;
1825 asection *sgot;
1826 asection *srela;
1827 bfd_vma plt_index;
1828 bfd_vma got_offset;
1829 bfd_vma addend;
1830 Elf_Internal_Rela rela;
1831 bfd_byte *loc;
1832
1833 /* This symbol has an entry in the procedure linkage table. Set
1834 it up. */
1835 BFD_ASSERT (h->dynindx != -1);
1836
1837 splt = bfd_get_section_by_name (dynobj, ".plt");
1838 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1839 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1840 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1841
1842 addend = 2 * (h->plt.offset & 1);
1843 h->plt.offset &= ~1;
1844
1845 /* Get the index in the procedure linkage table which
1846 corresponds to this symbol. This is the index of this symbol
1847 in all the symbols for which we are making plt entries. The
1848 first entry in the procedure linkage table is reserved. */
1849 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1850
1851 /* Get the offset into the .got table of the entry that
1852 corresponds to this function. Each .got entry is 4 bytes.
1853 The first two are reserved. */
1854 got_offset = (plt_index + 3) * 4;
1855
1856 /* Fill in the entry in the procedure linkage table. */
1857 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1858 PLT_ENTRY_SIZE);
1859
1860 /* The offset is relative to the first extension word. */
1861 bfd_put_32 (output_bfd,
1862 -(h->plt.offset + 8),
1863 splt->contents + h->plt.offset + 4);
1864
1865 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1866 splt->contents + h->plt.offset + 8);
1867
1868 /* Fill in the entry in the global offset table. */
1869 bfd_put_32 (output_bfd,
1870 (splt->output_section->vma
1871 + splt->output_offset
1872 + h->plt.offset) + addend,
1873 sgot->contents + got_offset);
1874
1875 /* Fill in the entry in the .rela.plt section. */
1876 rela.r_offset = (sgot->output_section->vma
1877 + sgot->output_offset
1878 + got_offset);
1879 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1880 rela.r_addend = addend;
1881 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1882 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1883
1884 if (!h->def_regular)
1885 {
1886 /* Mark the symbol as undefined, rather than as defined in
1887 the .plt section. Leave the value alone. */
1888 sym->st_shndx = SHN_UNDEF;
1889 }
1890 }
1891
1892 if (h->got.offset != (bfd_vma) -1)
1893 {
1894 asection *sgot;
1895 asection *srela;
1896 Elf_Internal_Rela rela;
1897 bfd_byte *loc;
1898
1899 /* This symbol has an entry in the global offset table. Set it
1900 up. */
1901 sgot = bfd_get_section_by_name (dynobj, ".got");
1902 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1903 BFD_ASSERT (sgot != NULL && srela != NULL);
1904
1905 rela.r_offset = (sgot->output_section->vma
1906 + sgot->output_offset
1907 + (h->got.offset &~ 1));
1908
1909 /* If the symbol was forced to be local because of a version file
1910 locally we just want to emit a RELATIVE reloc. The entry in
1911 the global offset table will already have been initialized in
1912 the relocate_section function. */
1913 if (info->shared
1914 && h->dynindx == -1
1915 && h->def_regular)
1916 {
1917 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1918 }
1919 else
1920 {
1921 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1922 }
1923 rela.r_addend = bfd_get_signed_32 (output_bfd,
1924 (sgot->contents
1925 + (h->got.offset & ~1)));
1926
1927 loc = srela->contents;
1928 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1929 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1930 }
1931
1932 if (h->needs_copy)
1933 {
1934 asection *s;
1935 Elf_Internal_Rela rela;
1936 bfd_byte *loc;
1937
1938 /* This symbol needs a copy reloc. Set it up. */
1939 BFD_ASSERT (h->dynindx != -1
1940 && (h->root.type == bfd_link_hash_defined
1941 || h->root.type == bfd_link_hash_defweak));
1942
1943 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1944 ".rela.bss");
1945 BFD_ASSERT (s != NULL);
1946
1947 rela.r_offset = (h->root.u.def.value
1948 + h->root.u.def.section->output_section->vma
1949 + h->root.u.def.section->output_offset);
1950 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1951 rela.r_addend = 0;
1952 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1953 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1954 }
1955
1956 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1957 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1958 || h == elf_hash_table (info)->hgot)
1959 sym->st_shndx = SHN_ABS;
1960
1961 return TRUE;
1962 }
1963
1964 /* Finish up the dynamic sections. */
1965
1966 static bfd_boolean
1967 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1968 {
1969 bfd *dynobj;
1970 asection *sgot;
1971 asection *sdyn;
1972
1973 dynobj = elf_hash_table (info)->dynobj;
1974
1975 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1976 BFD_ASSERT (sgot != NULL);
1977 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1978
1979 if (elf_hash_table (info)->dynamic_sections_created)
1980 {
1981 asection *splt;
1982 Elf32_External_Dyn *dyncon, *dynconend;
1983
1984 splt = bfd_get_section_by_name (dynobj, ".plt");
1985 BFD_ASSERT (splt != NULL && sdyn != NULL);
1986
1987 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1988 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1989 for (; dyncon < dynconend; dyncon++)
1990 {
1991 Elf_Internal_Dyn dyn;
1992 const char *name;
1993 asection *s;
1994
1995 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1996
1997 switch (dyn.d_tag)
1998 {
1999 default:
2000 break;
2001
2002 case DT_PLTGOT:
2003 name = ".got";
2004 goto get_vma;
2005 case DT_JMPREL:
2006 name = ".rela.plt";
2007 get_vma:
2008 s = bfd_get_section_by_name (output_bfd, name);
2009 BFD_ASSERT (s != NULL);
2010 dyn.d_un.d_ptr = s->vma;
2011 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2012 break;
2013
2014 case DT_PLTRELSZ:
2015 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2016 BFD_ASSERT (s != NULL);
2017 dyn.d_un.d_val = s->size;
2018 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2019 break;
2020
2021 case DT_RELASZ:
2022 /* The procedure linkage table relocs (DT_JMPREL) should
2023 not be included in the overall relocs (DT_RELA).
2024 Therefore, we override the DT_RELASZ entry here to
2025 make it not include the JMPREL relocs. Since the
2026 linker script arranges for .rela.plt to follow all
2027 other relocation sections, we don't have to worry
2028 about changing the DT_RELA entry. */
2029 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2030 if (s != NULL)
2031 dyn.d_un.d_val -= s->size;
2032 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2033 break;
2034 }
2035 }
2036
2037 /* Fill in the first entry in the procedure linkage table. */
2038 if (splt->size > 0)
2039 {
2040 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2041 bfd_put_32 (output_bfd,
2042 (sgot->output_section->vma
2043 + sgot->output_offset + 4
2044 - (splt->output_section->vma + 6)),
2045 splt->contents + 2);
2046 bfd_put_32 (output_bfd,
2047 (sgot->output_section->vma
2048 + sgot->output_offset + 8
2049 - (splt->output_section->vma + 12)),
2050 splt->contents + 8);
2051 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2052 = PLT_ENTRY_SIZE;
2053 }
2054 }
2055
2056 /* Fill in the first three entries in the global offset table. */
2057 if (sgot->size > 0)
2058 {
2059 if (sdyn == NULL)
2060 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2061 else
2062 bfd_put_32 (output_bfd,
2063 sdyn->output_section->vma + sdyn->output_offset,
2064 sgot->contents);
2065 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2066 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2067 }
2068
2069 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2070
2071 return TRUE;
2072 }
2073
2074 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2075 #define TARGET_LITTLE_NAME "elf32-vax"
2076 #define ELF_MACHINE_CODE EM_VAX
2077 #define ELF_MAXPAGESIZE 0x1000
2078
2079 #define elf_backend_create_dynamic_sections \
2080 _bfd_elf_create_dynamic_sections
2081 #define bfd_elf32_bfd_link_hash_table_create \
2082 elf_vax_link_hash_table_create
2083 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2084
2085 #define elf_backend_check_relocs elf_vax_check_relocs
2086 #define elf_backend_adjust_dynamic_symbol \
2087 elf_vax_adjust_dynamic_symbol
2088 #define elf_backend_size_dynamic_sections \
2089 elf_vax_size_dynamic_sections
2090 #define elf_backend_relocate_section elf_vax_relocate_section
2091 #define elf_backend_finish_dynamic_symbol \
2092 elf_vax_finish_dynamic_symbol
2093 #define elf_backend_finish_dynamic_sections \
2094 elf_vax_finish_dynamic_sections
2095 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2096 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2097 #define bfd_elf32_bfd_merge_private_bfd_data \
2098 elf32_vax_merge_private_bfd_data
2099 #define bfd_elf32_bfd_set_private_flags \
2100 elf32_vax_set_private_flags
2101 #define bfd_elf32_bfd_print_private_bfd_data \
2102 elf32_vax_print_private_bfd_data
2103
2104 #define elf_backend_can_gc_sections 1
2105 #define elf_backend_want_got_plt 1
2106 #define elf_backend_plt_readonly 1
2107 #define elf_backend_want_plt_sym 0
2108 #define elf_backend_got_header_size 16
2109 #define elf_backend_rela_normal 1
2110
2111 #include "elf32-target.h"
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