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* bfd/elflink.c (_bfd_elf_merge_symbol): Tighten up the test for early
[deliverable/binutils-gdb.git] / bfd / elf32-vax.c
1 /* VAX series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010 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 3 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,
21 MA 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28 #include "elf/vax.h"
29
30 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
31 static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
32 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
33 struct bfd_hash_table *,
34 const char *);
35 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
36 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
37 asection *, const Elf_Internal_Rela *);
38 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
39 struct elf_link_hash_entry *);
40 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
41 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
42 bfd *, asection *, bfd_byte *,
43 Elf_Internal_Rela *,
44 Elf_Internal_Sym *, asection **);
45 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
46 struct elf_link_hash_entry *,
47 Elf_Internal_Sym *);
48 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
49 struct bfd_link_info *);
50 static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *,
51 const arelent *);
52
53 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
54 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
55 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, PTR);
56
57 static reloc_howto_type howto_table[] = {
58 HOWTO (R_VAX_NONE, /* type */
59 0, /* rightshift */
60 0, /* size (0 = byte, 1 = short, 2 = long) */
61 0, /* bitsize */
62 FALSE, /* pc_relative */
63 0, /* bitpos */
64 complain_overflow_dont, /* complain_on_overflow */
65 bfd_elf_generic_reloc, /* special_function */
66 "R_VAX_NONE", /* name */
67 FALSE, /* partial_inplace */
68 0, /* src_mask */
69 0x00000000, /* dst_mask */
70 FALSE), /* pcrel_offset */
71
72 HOWTO (R_VAX_32, /* type */
73 0, /* rightshift */
74 2, /* size (0 = byte, 1 = short, 2 = long) */
75 32, /* bitsize */
76 FALSE, /* pc_relative */
77 0, /* bitpos */
78 complain_overflow_bitfield, /* complain_on_overflow */
79 bfd_elf_generic_reloc, /* special_function */
80 "R_VAX_32", /* name */
81 FALSE, /* partial_inplace */
82 0, /* src_mask */
83 0xffffffff, /* dst_mask */
84 FALSE), /* pcrel_offset */
85
86 HOWTO (R_VAX_16, /* type */
87 0, /* rightshift */
88 1, /* size (0 = byte, 1 = short, 2 = long) */
89 16, /* bitsize */
90 FALSE, /* pc_relative */
91 0, /* bitpos */
92 complain_overflow_bitfield, /* complain_on_overflow */
93 bfd_elf_generic_reloc, /* special_function */
94 "R_VAX_16", /* name */
95 FALSE, /* partial_inplace */
96 0, /* src_mask */
97 0x0000ffff, /* dst_mask */
98 FALSE), /* pcrel_offset */
99
100 HOWTO (R_VAX_8, /* type */
101 0, /* rightshift */
102 0, /* size (0 = byte, 1 = short, 2 = long) */
103 8, /* bitsize */
104 FALSE, /* pc_relative */
105 0, /* bitpos */
106 complain_overflow_bitfield, /* complain_on_overflow */
107 bfd_elf_generic_reloc, /* special_function */
108 "R_VAX_8", /* name */
109 FALSE, /* partial_inplace */
110 0, /* src_mask */
111 0x000000ff, /* dst_mask */
112 FALSE), /* pcrel_offset */
113
114 HOWTO (R_VAX_PC32, /* type */
115 0, /* rightshift */
116 2, /* size (0 = byte, 1 = short, 2 = long) */
117 32, /* bitsize */
118 TRUE, /* pc_relative */
119 0, /* bitpos */
120 complain_overflow_bitfield, /* complain_on_overflow */
121 bfd_elf_generic_reloc, /* special_function */
122 "R_VAX_PC32", /* name */
123 FALSE, /* partial_inplace */
124 0, /* src_mask */
125 0xffffffff, /* dst_mask */
126 TRUE), /* pcrel_offset */
127
128 HOWTO (R_VAX_PC16, /* type */
129 0, /* rightshift */
130 1, /* size (0 = byte, 1 = short, 2 = long) */
131 16, /* bitsize */
132 TRUE, /* pc_relative */
133 0, /* bitpos */
134 complain_overflow_signed, /* complain_on_overflow */
135 bfd_elf_generic_reloc, /* special_function */
136 "R_VAX_PC16", /* name */
137 FALSE, /* partial_inplace */
138 0, /* src_mask */
139 0x0000ffff, /* dst_mask */
140 TRUE), /* pcrel_offset */
141
142 HOWTO (R_VAX_PC8, /* type */
143 0, /* rightshift */
144 0, /* size (0 = byte, 1 = short, 2 = long) */
145 8, /* bitsize */
146 TRUE, /* pc_relative */
147 0, /* bitpos */
148 complain_overflow_signed, /* complain_on_overflow */
149 bfd_elf_generic_reloc, /* special_function */
150 "R_VAX_PC8", /* name */
151 FALSE, /* partial_inplace */
152 0, /* src_mask */
153 0x000000ff, /* dst_mask */
154 TRUE), /* pcrel_offset */
155
156 HOWTO (R_VAX_GOT32, /* type */
157 0, /* rightshift */
158 2, /* size (0 = byte, 1 = short, 2 = long) */
159 32, /* bitsize */
160 TRUE, /* pc_relative */
161 0, /* bitpos */
162 complain_overflow_bitfield, /* complain_on_overflow */
163 bfd_elf_generic_reloc, /* special_function */
164 "R_VAX_GOT32", /* name */
165 FALSE, /* partial_inplace */
166 0, /* src_mask */
167 0xffffffff, /* dst_mask */
168 TRUE), /* pcrel_offset */
169
170 EMPTY_HOWTO (-1),
171 EMPTY_HOWTO (-1),
172 EMPTY_HOWTO (-1),
173 EMPTY_HOWTO (-1),
174 EMPTY_HOWTO (-1),
175
176 HOWTO (R_VAX_PLT32, /* type */
177 0, /* rightshift */
178 2, /* size (0 = byte, 1 = short, 2 = long) */
179 32, /* bitsize */
180 TRUE, /* pc_relative */
181 0, /* bitpos */
182 complain_overflow_bitfield, /* complain_on_overflow */
183 bfd_elf_generic_reloc, /* special_function */
184 "R_VAX_PLT32", /* name */
185 FALSE, /* partial_inplace */
186 0, /* src_mask */
187 0xffffffff, /* dst_mask */
188 TRUE), /* pcrel_offset */
189
190 EMPTY_HOWTO (-1),
191 EMPTY_HOWTO (-1),
192 EMPTY_HOWTO (-1),
193 EMPTY_HOWTO (-1),
194 EMPTY_HOWTO (-1),
195
196 HOWTO (R_VAX_COPY, /* type */
197 0, /* rightshift */
198 0, /* size (0 = byte, 1 = short, 2 = long) */
199 0, /* bitsize */
200 FALSE, /* pc_relative */
201 0, /* bitpos */
202 complain_overflow_dont, /* complain_on_overflow */
203 bfd_elf_generic_reloc, /* special_function */
204 "R_VAX_COPY", /* name */
205 FALSE, /* partial_inplace */
206 0, /* src_mask */
207 0xffffffff, /* dst_mask */
208 FALSE), /* pcrel_offset */
209
210 HOWTO (R_VAX_GLOB_DAT, /* type */
211 0, /* rightshift */
212 2, /* size (0 = byte, 1 = short, 2 = long) */
213 32, /* bitsize */
214 FALSE, /* pc_relative */
215 0, /* bitpos */
216 complain_overflow_dont, /* complain_on_overflow */
217 bfd_elf_generic_reloc, /* special_function */
218 "R_VAX_GLOB_DAT", /* name */
219 FALSE, /* partial_inplace */
220 0, /* src_mask */
221 0xffffffff, /* dst_mask */
222 FALSE), /* pcrel_offset */
223
224 HOWTO (R_VAX_JMP_SLOT, /* type */
225 0, /* rightshift */
226 2, /* size (0 = byte, 1 = short, 2 = long) */
227 32, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_dont, /* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_VAX_JMP_SLOT", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0xffffffff, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 HOWTO (R_VAX_RELATIVE, /* type */
239 0, /* rightshift */
240 2, /* size (0 = byte, 1 = short, 2 = long) */
241 32, /* bitsize */
242 FALSE, /* pc_relative */
243 0, /* bitpos */
244 complain_overflow_dont, /* complain_on_overflow */
245 bfd_elf_generic_reloc, /* special_function */
246 "R_VAX_RELATIVE", /* name */
247 FALSE, /* partial_inplace */
248 0, /* src_mask */
249 0xffffffff, /* dst_mask */
250 FALSE), /* pcrel_offset */
251
252 /* GNU extension to record C++ vtable hierarchy */
253 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
254 0, /* rightshift */
255 2, /* size (0 = byte, 1 = short, 2 = long) */
256 0, /* bitsize */
257 FALSE, /* pc_relative */
258 0, /* bitpos */
259 complain_overflow_dont, /* complain_on_overflow */
260 NULL, /* special_function */
261 "R_VAX_GNU_VTINHERIT", /* name */
262 FALSE, /* partial_inplace */
263 0, /* src_mask */
264 0, /* dst_mask */
265 FALSE), /* pcrel_offset */
266
267 /* GNU extension to record C++ vtable member usage */
268 HOWTO (R_VAX_GNU_VTENTRY, /* type */
269 0, /* rightshift */
270 2, /* size (0 = byte, 1 = short, 2 = long) */
271 0, /* bitsize */
272 FALSE, /* pc_relative */
273 0, /* bitpos */
274 complain_overflow_dont, /* complain_on_overflow */
275 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
276 "R_VAX_GNU_VTENTRY", /* name */
277 FALSE, /* partial_inplace */
278 0, /* src_mask */
279 0, /* dst_mask */
280 FALSE), /* pcrel_offset */
281 };
282
283 static void
284 rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
285 Elf_Internal_Rela *dst)
286 {
287 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
288 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
289 }
290
291 #define elf_info_to_howto rtype_to_howto
292
293 static const struct
294 {
295 bfd_reloc_code_real_type bfd_val;
296 int elf_val;
297 } reloc_map[] = {
298 { BFD_RELOC_NONE, R_VAX_NONE },
299 { BFD_RELOC_32, R_VAX_32 },
300 { BFD_RELOC_16, R_VAX_16 },
301 { BFD_RELOC_8, R_VAX_8 },
302 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
303 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
304 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
305 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
306 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
307 { BFD_RELOC_NONE, R_VAX_COPY },
308 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
309 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
310 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
311 { BFD_RELOC_CTOR, R_VAX_32 },
312 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
313 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
314 };
315
316 static reloc_howto_type *
317 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
318 {
319 unsigned int i;
320 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
321 {
322 if (reloc_map[i].bfd_val == code)
323 return &howto_table[reloc_map[i].elf_val];
324 }
325 return 0;
326 }
327
328 static reloc_howto_type *
329 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
330 const char *r_name)
331 {
332 unsigned int i;
333
334 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
335 if (howto_table[i].name != NULL
336 && strcasecmp (howto_table[i].name, r_name) == 0)
337 return &howto_table[i];
338
339 return NULL;
340 }
341
342 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
343 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
344 #define ELF_ARCH bfd_arch_vax
345 /* end code generated by elf.el */
346 \f
347 /* Functions for the VAX ELF linker. */
348
349 /* The name of the dynamic interpreter. This is put in the .interp
350 section. */
351
352 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
353
354 /* The size in bytes of an entry in the procedure linkage table. */
355
356 #define PLT_ENTRY_SIZE 12
357
358 /* The first entry in a procedure linkage table looks like this. See
359 the SVR4 ABI VAX supplement to see how this works. */
360
361 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
362 {
363 0xdd, 0xef, /* pushl l^ */
364 0, 0, 0, 0, /* offset to .plt.got + 4 */
365 0x17, 0xff, /* jmp @L^(pc) */
366 0, 0, 0, 0, /* offset to .plt.got + 8 */
367 };
368
369 /* Subsequent entries in a procedure linkage table look like this. */
370
371 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
372 {
373 0xfc, 0x0f, /* .word ^M<r11:r2> */
374 0x16, 0xef, /* jsb L^(pc) */
375 0, 0, 0, 0, /* replaced with offset to start of .plt */
376 0, 0, 0, 0, /* index into .rela.plt */
377 };
378
379 /* The VAX linker needs to keep track of the number of relocs that it
380 decides to copy in check_relocs for each symbol. This is so that it
381 can discard PC relative relocs if it doesn't need them when linking
382 with -Bsymbolic. We store the information in a field extending the
383 regular ELF linker hash table. */
384
385 /* This structure keeps track of the number of PC relative relocs we have
386 copied for a given symbol. */
387
388 struct elf_vax_pcrel_relocs_copied
389 {
390 /* Next section. */
391 struct elf_vax_pcrel_relocs_copied *next;
392 /* A section in dynobj. */
393 asection *section;
394 /* Number of relocs copied in this section. */
395 bfd_size_type count;
396 };
397
398 /* VAX ELF linker hash entry. */
399
400 struct elf_vax_link_hash_entry
401 {
402 struct elf_link_hash_entry root;
403
404 /* Number of PC relative relocs copied for this symbol. */
405 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
406
407 bfd_vma got_addend;
408 };
409
410 /* Declare this now that the above structures are defined. */
411
412 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
413 void *);
414
415 /* Declare this now that the above structures are defined. */
416
417 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
418 void *);
419
420 /* Traverse an VAX ELF linker hash table. */
421
422 #define elf_vax_link_hash_traverse(table, func, info) \
423 (elf_link_hash_traverse \
424 ((table), \
425 (bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \
426 (info)))
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_link_hash_table *ret;
465 bfd_size_type amt = sizeof (struct elf_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, abfd,
472 elf_vax_link_hash_newfunc,
473 sizeof (struct elf_vax_link_hash_entry),
474 GENERIC_ELF_DATA))
475 {
476 free (ret);
477 return NULL;
478 }
479
480 return &ret->root;
481 }
482
483 /* Keep vax-specific flags in the ELF header */
484 static bfd_boolean
485 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
486 {
487 elf_elfheader (abfd)->e_flags = flags;
488 elf_flags_init (abfd) = TRUE;
489 return TRUE;
490 }
491
492 /* Merge backend specific data from an object file to the output
493 object file when linking. */
494 static bfd_boolean
495 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
496 {
497 flagword out_flags;
498 flagword in_flags;
499
500 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
501 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
502 return TRUE;
503
504 in_flags = elf_elfheader (ibfd)->e_flags;
505 out_flags = elf_elfheader (obfd)->e_flags;
506
507 if (!elf_flags_init (obfd))
508 {
509 elf_flags_init (obfd) = TRUE;
510 elf_elfheader (obfd)->e_flags = in_flags;
511 }
512
513 return TRUE;
514 }
515
516 /* Display the flags field */
517 static bfd_boolean
518 elf32_vax_print_private_bfd_data (bfd *abfd, PTR ptr)
519 {
520 FILE *file = (FILE *) ptr;
521
522 BFD_ASSERT (abfd != NULL && ptr != NULL);
523
524 /* Print normal ELF private data. */
525 _bfd_elf_print_private_bfd_data (abfd, ptr);
526
527 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
528
529 /* xgettext:c-format */
530 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
531
532 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
533 fprintf (file, _(" [nonpic]"));
534
535 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
536 fprintf (file, _(" [d-float]"));
537
538 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
539 fprintf (file, _(" [g-float]"));
540
541 fputc ('\n', file);
542
543 return TRUE;
544 }
545 /* Look through the relocs for a section during the first phase, and
546 allocate space in the global offset table or procedure linkage
547 table. */
548
549 static bfd_boolean
550 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
551 const Elf_Internal_Rela *relocs)
552 {
553 bfd *dynobj;
554 Elf_Internal_Shdr *symtab_hdr;
555 struct elf_link_hash_entry **sym_hashes;
556 const Elf_Internal_Rela *rel;
557 const Elf_Internal_Rela *rel_end;
558 asection *sgot;
559 asection *srelgot;
560 asection *sreloc;
561
562 if (info->relocatable)
563 return TRUE;
564
565 dynobj = elf_hash_table (info)->dynobj;
566 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
567 sym_hashes = elf_sym_hashes (abfd);
568
569 sgot = NULL;
570 srelgot = NULL;
571 sreloc = NULL;
572
573 rel_end = relocs + sec->reloc_count;
574 for (rel = relocs; rel < rel_end; rel++)
575 {
576 unsigned long r_symndx;
577 struct elf_link_hash_entry *h;
578
579 r_symndx = ELF32_R_SYM (rel->r_info);
580
581 if (r_symndx < symtab_hdr->sh_info)
582 h = NULL;
583 else
584 {
585 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
586 while (h->root.type == bfd_link_hash_indirect
587 || h->root.type == bfd_link_hash_warning)
588 h = (struct elf_link_hash_entry *) h->root.u.i.link;
589 }
590
591 switch (ELF32_R_TYPE (rel->r_info))
592 {
593 case R_VAX_GOT32:
594 BFD_ASSERT (h != NULL);
595 if (h->forced_local
596 || h == elf_hash_table (info)->hgot
597 || h == elf_hash_table (info)->hplt)
598 break;
599
600 /* If this is a local symbol, we resolve it directly without
601 creating a global offset table entry. */
602 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
603 break;
604
605 /* This symbol requires a global offset table entry. */
606
607 if (dynobj == NULL)
608 {
609 /* Create the .got section. */
610 elf_hash_table (info)->dynobj = dynobj = abfd;
611 if (!_bfd_elf_create_got_section (dynobj, info))
612 return FALSE;
613 }
614
615 if (sgot == NULL)
616 {
617 sgot = bfd_get_section_by_name (dynobj, ".got");
618 BFD_ASSERT (sgot != NULL);
619 }
620
621 if (srelgot == NULL
622 && (h != NULL || info->shared))
623 {
624 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
625 if (srelgot == NULL)
626 {
627 srelgot = bfd_make_section_with_flags (dynobj,
628 ".rela.got",
629 (SEC_ALLOC
630 | SEC_LOAD
631 | SEC_HAS_CONTENTS
632 | SEC_IN_MEMORY
633 | SEC_LINKER_CREATED
634 | SEC_READONLY));
635 if (srelgot == NULL
636 || !bfd_set_section_alignment (dynobj, srelgot, 2))
637 return FALSE;
638 }
639 }
640
641 if (h != NULL)
642 {
643 struct elf_vax_link_hash_entry *eh;
644
645 eh = (struct elf_vax_link_hash_entry *) h;
646 if (h->got.refcount == -1)
647 {
648 h->got.refcount = 1;
649 eh->got_addend = rel->r_addend;
650 }
651 else
652 {
653 h->got.refcount++;
654 if (eh->got_addend != (bfd_vma) rel->r_addend)
655 (*_bfd_error_handler)
656 (_("%s: warning: GOT addend of %ld to `%s' does"
657 " not match previous GOT addend of %ld"),
658 bfd_get_filename (abfd), rel->r_addend,
659 h->root.root.string,
660 eh->got_addend);
661
662 }
663 }
664 break;
665
666 case R_VAX_PLT32:
667 /* This symbol requires a procedure linkage table entry. We
668 actually build the entry in adjust_dynamic_symbol,
669 because this might be a case of linking PIC code which is
670 never referenced by a dynamic object, in which case we
671 don't need to generate a procedure linkage table entry
672 after all. */
673
674 /* If this is a local symbol, we resolve it directly without
675 creating a procedure linkage table entry. */
676 BFD_ASSERT (h != NULL);
677 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT || h->forced_local)
678 break;
679
680 h->needs_plt = 1;
681 if (h->plt.refcount == -1)
682 h->plt.refcount = 1;
683 else
684 h->plt.refcount++;
685 break;
686
687 case R_VAX_PC8:
688 case R_VAX_PC16:
689 case R_VAX_PC32:
690 /* If we are creating a shared library and this is not a local
691 symbol, we need to copy the reloc into the shared library.
692 However when linking with -Bsymbolic and this is a global
693 symbol which is defined in an object we are including in the
694 link (i.e., DEF_REGULAR is set), then we can resolve the
695 reloc directly. At this point we have not seen all the input
696 files, so it is possible that DEF_REGULAR is not set now but
697 will be set later (it is never cleared). We account for that
698 possibility below by storing information in the
699 pcrel_relocs_copied field of the hash table entry. */
700 if (!(info->shared
701 && (sec->flags & SEC_ALLOC) != 0
702 && h != NULL
703 && (!info->symbolic
704 || !h->def_regular)))
705 {
706 if (h != NULL
707 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
708 && !h->forced_local)
709 {
710 /* Make sure a plt entry is created for this symbol if
711 it turns out to be a function defined by a dynamic
712 object. */
713 if (h->plt.refcount == -1)
714 h->plt.refcount = 1;
715 else
716 h->plt.refcount++;
717 }
718 break;
719 }
720 /* If this is a local symbol, we can resolve it directly. */
721 if (h != NULL
722 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
723 || h->forced_local))
724 break;
725
726 /* Fall through. */
727 case R_VAX_8:
728 case R_VAX_16:
729 case R_VAX_32:
730 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
731 {
732 /* Make sure a plt entry is created for this symbol if it
733 turns out to be a function defined by a dynamic object. */
734 if (h->plt.refcount == -1)
735 h->plt.refcount = 1;
736 else
737 h->plt.refcount++;
738 }
739
740 /* If we are creating a shared library, we need to copy the
741 reloc into the shared library. */
742 if (info->shared
743 && (sec->flags & SEC_ALLOC) != 0)
744 {
745 /* When creating a shared object, we must copy these
746 reloc types into the output file. We create a reloc
747 section in dynobj and make room for this reloc. */
748 if (sreloc == NULL)
749 {
750 sreloc = _bfd_elf_make_dynamic_reloc_section
751 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
752
753 if (sreloc == NULL)
754 return FALSE;
755
756 if (sec->flags & SEC_READONLY)
757 info->flags |= DF_TEXTREL;
758 }
759
760 sreloc->size += sizeof (Elf32_External_Rela);
761
762 /* If we are linking with -Bsymbolic, we count the number of
763 PC relative relocations we have entered for this symbol,
764 so that we can discard them again if the symbol is later
765 defined by a regular object. Note that this function is
766 only called if we are using a vaxelf linker hash table,
767 which means that h is really a pointer to an
768 elf_vax_link_hash_entry. */
769 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
770 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
771 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
772 && info->symbolic)
773 {
774 struct elf_vax_link_hash_entry *eh;
775 struct elf_vax_pcrel_relocs_copied *p;
776
777 eh = (struct elf_vax_link_hash_entry *) h;
778
779 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
780 if (p->section == sreloc)
781 break;
782
783 if (p == NULL)
784 {
785 p = ((struct elf_vax_pcrel_relocs_copied *)
786 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
787 if (p == NULL)
788 return FALSE;
789 p->next = eh->pcrel_relocs_copied;
790 eh->pcrel_relocs_copied = p;
791 p->section = sreloc;
792 p->count = 0;
793 }
794
795 ++p->count;
796 }
797 }
798
799 break;
800
801 /* This relocation describes the C++ object vtable hierarchy.
802 Reconstruct it for later use during GC. */
803 case R_VAX_GNU_VTINHERIT:
804 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
805 return FALSE;
806 break;
807
808 /* This relocation describes which C++ vtable entries are actually
809 used. Record for later use during GC. */
810 case R_VAX_GNU_VTENTRY:
811 BFD_ASSERT (h != NULL);
812 if (h != NULL
813 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
814 return FALSE;
815 break;
816
817 default:
818 break;
819 }
820 }
821
822 return TRUE;
823 }
824
825 /* Return the section that should be marked against GC for a given
826 relocation. */
827
828 static asection *
829 elf_vax_gc_mark_hook (asection *sec,
830 struct bfd_link_info *info,
831 Elf_Internal_Rela *rel,
832 struct elf_link_hash_entry *h,
833 Elf_Internal_Sym *sym)
834 {
835 if (h != NULL)
836 switch (ELF32_R_TYPE (rel->r_info))
837 {
838 case R_VAX_GNU_VTINHERIT:
839 case R_VAX_GNU_VTENTRY:
840 return NULL;
841 }
842
843 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
844 }
845
846 /* Update the got entry reference counts for the section being removed. */
847
848 static bfd_boolean
849 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
850 const Elf_Internal_Rela *relocs)
851 {
852 Elf_Internal_Shdr *symtab_hdr;
853 struct elf_link_hash_entry **sym_hashes;
854 const Elf_Internal_Rela *rel, *relend;
855 bfd *dynobj;
856
857 if (info->relocatable)
858 return TRUE;
859
860 dynobj = elf_hash_table (info)->dynobj;
861 if (dynobj == NULL)
862 return TRUE;
863
864 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
865 sym_hashes = elf_sym_hashes (abfd);
866
867 relend = relocs + sec->reloc_count;
868 for (rel = relocs; rel < relend; rel++)
869 {
870 unsigned long r_symndx;
871 struct elf_link_hash_entry *h = NULL;
872
873 r_symndx = ELF32_R_SYM (rel->r_info);
874 if (r_symndx >= symtab_hdr->sh_info)
875 {
876 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
877 while (h->root.type == bfd_link_hash_indirect
878 || h->root.type == bfd_link_hash_warning)
879 h = (struct elf_link_hash_entry *) h->root.u.i.link;
880 }
881
882 switch (ELF32_R_TYPE (rel->r_info))
883 {
884 case R_VAX_GOT32:
885 if (h != NULL && h->got.refcount > 0)
886 --h->got.refcount;
887 break;
888
889 case R_VAX_PLT32:
890 case R_VAX_PC8:
891 case R_VAX_PC16:
892 case R_VAX_PC32:
893 case R_VAX_8:
894 case R_VAX_16:
895 case R_VAX_32:
896 if (h != NULL && h->plt.refcount > 0)
897 --h->plt.refcount;
898 break;
899
900 default:
901 break;
902 }
903 }
904
905 return TRUE;
906 }
907
908 /* Adjust a symbol defined by a dynamic object and referenced by a
909 regular object. The current definition is in some section of the
910 dynamic object, but we're not including those sections. We have to
911 change the definition to something the rest of the link can
912 understand. */
913
914 static bfd_boolean
915 elf_vax_adjust_dynamic_symbol (info, h)
916 struct bfd_link_info *info;
917 struct elf_link_hash_entry *h;
918 {
919 bfd *dynobj;
920 asection *s;
921
922 dynobj = elf_hash_table (info)->dynobj;
923
924 /* Make sure we know what is going on here. */
925 BFD_ASSERT (dynobj != NULL
926 && (h->needs_plt
927 || h->u.weakdef != NULL
928 || (h->def_dynamic
929 && h->ref_regular
930 && !h->def_regular)));
931
932 /* If this is a function, put it in the procedure linkage table. We
933 will fill in the contents of the procedure linkage table later,
934 when we know the address of the .got section. */
935 if (h->type == STT_FUNC
936 || h->needs_plt)
937 {
938 if (! info->shared
939 && !h->def_dynamic
940 && !h->ref_dynamic
941 /* We must always create the plt entry if it was referenced
942 by a PLTxxO relocation. In this case we already recorded
943 it as a dynamic symbol. */
944 && h->dynindx == -1)
945 {
946 /* This case can occur if we saw a PLTxx reloc in an input
947 file, but the symbol was never referred to by a dynamic
948 object. In such a case, we don't actually need to build
949 a procedure linkage table, and we can just do a PCxx
950 reloc instead. */
951 BFD_ASSERT (h->needs_plt);
952 h->plt.offset = (bfd_vma) -1;
953 return TRUE;
954 }
955
956 /* GC may have rendered this entry unused. */
957 if (h->plt.refcount <= 0)
958 {
959 h->needs_plt = 0;
960 h->plt.offset = (bfd_vma) -1;
961 return TRUE;
962 }
963
964 /* Make sure this symbol is output as a dynamic symbol. */
965 if (h->dynindx == -1)
966 {
967 if (! bfd_elf_link_record_dynamic_symbol (info, h))
968 return FALSE;
969 }
970
971 s = bfd_get_section_by_name (dynobj, ".plt");
972 BFD_ASSERT (s != NULL);
973
974 /* If this is the first .plt entry, make room for the special
975 first entry. */
976 if (s->size == 0)
977 {
978 s->size += PLT_ENTRY_SIZE;
979 }
980
981 /* If this symbol is not defined in a regular file, and we are
982 not generating a shared library, then set the symbol to this
983 location in the .plt. This is required to make function
984 pointers compare as equal between the normal executable and
985 the shared library. */
986 if (!info->shared
987 && !h->def_regular)
988 {
989 h->root.u.def.section = s;
990 h->root.u.def.value = s->size;
991 }
992
993 h->plt.offset = s->size;
994
995 /* Make room for this entry. */
996 s->size += PLT_ENTRY_SIZE;
997
998 /* We also need to make an entry in the .got.plt section, which
999 will be placed in the .got section by the linker script. */
1000
1001 s = bfd_get_section_by_name (dynobj, ".got.plt");
1002 BFD_ASSERT (s != NULL);
1003 s->size += 4;
1004
1005 /* We also need to make an entry in the .rela.plt section. */
1006
1007 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1008 BFD_ASSERT (s != NULL);
1009 s->size += sizeof (Elf32_External_Rela);
1010
1011 return TRUE;
1012 }
1013
1014 /* Reinitialize the plt offset now that it is not used as a reference
1015 count any more. */
1016 h->plt.offset = (bfd_vma) -1;
1017
1018 /* If this is a weak symbol, and there is a real definition, the
1019 processor independent code will have arranged for us to see the
1020 real definition first, and we can just use the same value. */
1021 if (h->u.weakdef != NULL)
1022 {
1023 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1024 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1025 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1026 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1027 return TRUE;
1028 }
1029
1030 /* This is a reference to a symbol defined by a dynamic object which
1031 is not a function. */
1032
1033 /* If we are creating a shared library, we must presume that the
1034 only references to the symbol are via the global offset table.
1035 For such cases we need not do anything here; the relocations will
1036 be handled correctly by relocate_section. */
1037 if (info->shared)
1038 return TRUE;
1039
1040 if (h->size == 0)
1041 {
1042 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1043 h->root.root.string);
1044 return TRUE;
1045 }
1046
1047 /* We must allocate the symbol in our .dynbss section, which will
1048 become part of the .bss section of the executable. There will be
1049 an entry for this symbol in the .dynsym section. The dynamic
1050 object will contain position independent code, so all references
1051 from the dynamic object to this symbol will go through the global
1052 offset table. The dynamic linker will use the .dynsym entry to
1053 determine the address it must put in the global offset table, so
1054 both the dynamic object and the regular object will refer to the
1055 same memory location for the variable. */
1056
1057 s = bfd_get_section_by_name (dynobj, ".dynbss");
1058 BFD_ASSERT (s != NULL);
1059
1060 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1061 copy the initial value out of the dynamic object and into the
1062 runtime process image. We need to remember the offset into the
1063 .rela.bss section we are going to use. */
1064 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1065 {
1066 asection *srel;
1067
1068 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1069 BFD_ASSERT (srel != NULL);
1070 srel->size += sizeof (Elf32_External_Rela);
1071 h->needs_copy = 1;
1072 }
1073
1074 return _bfd_elf_adjust_dynamic_copy (h, s);
1075 }
1076
1077 /* Set the sizes of the dynamic sections. */
1078
1079 static bfd_boolean
1080 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1081 {
1082 bfd *dynobj;
1083 asection *s;
1084 bfd_boolean plt;
1085 bfd_boolean relocs;
1086 bfd_boolean reltext;
1087
1088 dynobj = elf_hash_table (info)->dynobj;
1089 BFD_ASSERT (dynobj != NULL);
1090
1091 if (elf_hash_table (info)->dynamic_sections_created)
1092 {
1093 /* Set the contents of the .interp section to the interpreter. */
1094 if (info->executable)
1095 {
1096 s = bfd_get_section_by_name (dynobj, ".interp");
1097 BFD_ASSERT (s != NULL);
1098 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1099 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1100 }
1101 }
1102 else
1103 {
1104 /* We may have created entries in the .rela.got and .got sections.
1105 However, if we are not creating the dynamic sections, we will
1106 not actually use these entries. Reset the size of .rela.got
1107 and .got, which will cause it to get stripped from the output
1108 file below. */
1109 s = bfd_get_section_by_name (dynobj, ".rela.got");
1110 if (s != NULL)
1111 s->size = 0;
1112 s = bfd_get_section_by_name (dynobj, ".got.plt");
1113 if (s != NULL)
1114 s->size = 0;
1115 s = bfd_get_section_by_name (dynobj, ".got");
1116 if (s != NULL)
1117 s->size = 0;
1118 }
1119
1120 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1121 relative relocs against symbols defined in a regular object. We
1122 allocated space for them in the check_relocs routine, but we will not
1123 fill them in in the relocate_section routine. */
1124 if (info->shared && info->symbolic)
1125 elf_vax_link_hash_traverse (elf_hash_table (info),
1126 elf_vax_discard_copies,
1127 NULL);
1128
1129 /* If this is a -Bsymbolic shared link or a static link, we need to
1130 discard all the got entries we've recorded. Otherwise, we need to
1131 instantiate (allocate space for them). */
1132 elf_link_hash_traverse (elf_hash_table (info),
1133 elf_vax_instantiate_got_entries,
1134 (PTR) info);
1135
1136 /* The check_relocs and adjust_dynamic_symbol entry points have
1137 determined the sizes of the various dynamic sections. Allocate
1138 memory for them. */
1139 plt = FALSE;
1140 relocs = FALSE;
1141 reltext = FALSE;
1142 for (s = dynobj->sections; s != NULL; s = s->next)
1143 {
1144 const char *name;
1145
1146 if ((s->flags & SEC_LINKER_CREATED) == 0)
1147 continue;
1148
1149 /* It's OK to base decisions on the section name, because none
1150 of the dynobj section names depend upon the input files. */
1151 name = bfd_get_section_name (dynobj, s);
1152
1153 if (strcmp (name, ".plt") == 0)
1154 {
1155 /* Remember whether there is a PLT. */
1156 plt = s->size != 0;
1157 }
1158 else if (CONST_STRNEQ (name, ".rela"))
1159 {
1160 if (s->size != 0)
1161 {
1162 asection *target;
1163
1164 /* Remember whether there are any reloc sections other
1165 than .rela.plt. */
1166 if (strcmp (name, ".rela.plt") != 0)
1167 {
1168 const char *outname;
1169
1170 relocs = TRUE;
1171
1172 /* If this relocation section applies to a read only
1173 section, then we probably need a DT_TEXTREL
1174 entry. .rela.plt is actually associated with
1175 .got.plt, which is never readonly. */
1176 outname = bfd_get_section_name (output_bfd,
1177 s->output_section);
1178 target = bfd_get_section_by_name (output_bfd, outname + 5);
1179 if (target != NULL
1180 && (target->flags & SEC_READONLY) != 0
1181 && (target->flags & SEC_ALLOC) != 0)
1182 reltext = TRUE;
1183 }
1184
1185 /* We use the reloc_count field as a counter if we need
1186 to copy relocs into the output file. */
1187 s->reloc_count = 0;
1188 }
1189 }
1190 else if (! CONST_STRNEQ (name, ".got")
1191 && strcmp (name, ".dynbss") != 0)
1192 {
1193 /* It's not one of our sections, so don't allocate space. */
1194 continue;
1195 }
1196
1197 if (s->size == 0)
1198 {
1199 /* If we don't need this section, strip it from the
1200 output file. This is mostly to handle .rela.bss and
1201 .rela.plt. We must create both sections in
1202 create_dynamic_sections, because they must be created
1203 before the linker maps input sections to output
1204 sections. The linker does that before
1205 adjust_dynamic_symbol is called, and it is that
1206 function which decides whether anything needs to go
1207 into these sections. */
1208 s->flags |= SEC_EXCLUDE;
1209 continue;
1210 }
1211
1212 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1213 continue;
1214
1215 /* Allocate memory for the section contents. */
1216 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1217 if (s->contents == NULL)
1218 return FALSE;
1219 }
1220
1221 if (elf_hash_table (info)->dynamic_sections_created)
1222 {
1223 /* Add some entries to the .dynamic section. We fill in the
1224 values later, in elf_vax_finish_dynamic_sections, but we
1225 must add the entries now so that we get the correct size for
1226 the .dynamic section. The DT_DEBUG entry is filled in by the
1227 dynamic linker and used by the debugger. */
1228 #define add_dynamic_entry(TAG, VAL) \
1229 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1230
1231 if (!info->shared)
1232 {
1233 if (!add_dynamic_entry (DT_DEBUG, 0))
1234 return FALSE;
1235 }
1236
1237 if (plt)
1238 {
1239 if (!add_dynamic_entry (DT_PLTGOT, 0)
1240 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1241 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1242 || !add_dynamic_entry (DT_JMPREL, 0))
1243 return FALSE;
1244 }
1245
1246 if (relocs)
1247 {
1248 if (!add_dynamic_entry (DT_RELA, 0)
1249 || !add_dynamic_entry (DT_RELASZ, 0)
1250 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1251 return FALSE;
1252 }
1253
1254 if (reltext || (info->flags & DF_TEXTREL) != 0)
1255 {
1256 if (!add_dynamic_entry (DT_TEXTREL, 0))
1257 return FALSE;
1258 }
1259 }
1260 #undef add_dynamic_entry
1261
1262 return TRUE;
1263 }
1264
1265 /* This function is called via elf_vax_link_hash_traverse if we are
1266 creating a shared object with -Bsymbolic. It discards the space
1267 allocated to copy PC relative relocs against symbols which are defined
1268 in regular objects. We allocated space for them in the check_relocs
1269 routine, but we won't fill them in in the relocate_section routine. */
1270
1271 static bfd_boolean
1272 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1273 PTR ignore ATTRIBUTE_UNUSED)
1274 {
1275 struct elf_vax_pcrel_relocs_copied *s;
1276
1277 if (h->root.root.type == bfd_link_hash_warning)
1278 h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
1279
1280 /* We only discard relocs for symbols defined in a regular object. */
1281 if (!h->root.def_regular)
1282 return TRUE;
1283
1284 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1285 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1286
1287 return TRUE;
1288 }
1289
1290 /* This function is called via elf_link_hash_traverse. It looks for entries
1291 that have GOT or PLT (.GOT) references. If creating a static object or a
1292 shared object with -Bsymbolic, it resets the reference count back to 0
1293 and sets the offset to -1 so normal PC32 relocation will be done. If
1294 creating a shared object or executable, space in the .got and .rela.got
1295 will be reserved for the symbol. */
1296
1297 static bfd_boolean
1298 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, PTR infoptr)
1299 {
1300 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1301 bfd *dynobj;
1302 asection *sgot;
1303 asection *srelgot;
1304
1305 /* We don't care about non-GOT (and non-PLT) entries. */
1306 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1307 return TRUE;
1308
1309 dynobj = elf_hash_table (info)->dynobj;
1310 if (dynobj == NULL)
1311 return TRUE;
1312
1313 sgot = bfd_get_section_by_name (dynobj, ".got");
1314 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1315
1316 if (!elf_hash_table (info)->dynamic_sections_created
1317 || (info->shared && info->symbolic)
1318 || h->forced_local)
1319 {
1320 h->got.refcount = 0;
1321 h->got.offset = (bfd_vma) -1;
1322 h->plt.refcount = 0;
1323 h->plt.offset = (bfd_vma) -1;
1324 }
1325 else if (h->got.refcount > 0)
1326 {
1327 bfd_boolean dyn;
1328
1329 /* Make sure this symbol is output as a dynamic symbol. */
1330 if (h->dynindx == -1)
1331 {
1332 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1333 return FALSE;
1334 }
1335
1336 dyn = elf_hash_table (info)->dynamic_sections_created;
1337 /* Allocate space in the .got and .rela.got sections. */
1338 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1339 && (info->shared
1340 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1341 {
1342 sgot->size += 4;
1343 srelgot->size += sizeof (Elf32_External_Rela);
1344 }
1345 }
1346
1347 return TRUE;
1348 }
1349
1350 /* Relocate an VAX ELF section. */
1351
1352 static bfd_boolean
1353 elf_vax_relocate_section (bfd *output_bfd,
1354 struct bfd_link_info *info,
1355 bfd *input_bfd,
1356 asection *input_section,
1357 bfd_byte *contents,
1358 Elf_Internal_Rela *relocs,
1359 Elf_Internal_Sym *local_syms,
1360 asection **local_sections)
1361 {
1362 bfd *dynobj;
1363 Elf_Internal_Shdr *symtab_hdr;
1364 struct elf_link_hash_entry **sym_hashes;
1365 bfd_vma *local_got_offsets;
1366 bfd_vma plt_index;
1367 bfd_vma got_offset;
1368 asection *sgot;
1369 asection *splt;
1370 asection *sgotplt;
1371 asection *sreloc;
1372 Elf_Internal_Rela *rel;
1373 Elf_Internal_Rela *relend;
1374
1375 dynobj = elf_hash_table (info)->dynobj;
1376 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1377 sym_hashes = elf_sym_hashes (input_bfd);
1378 local_got_offsets = elf_local_got_offsets (input_bfd);
1379
1380 sgot = NULL;
1381 splt = NULL;
1382 sgotplt = NULL;
1383 sreloc = NULL;
1384
1385 rel = relocs;
1386 relend = relocs + input_section->reloc_count;
1387 for (; rel < relend; rel++)
1388 {
1389 int r_type;
1390 reloc_howto_type *howto;
1391 unsigned long r_symndx;
1392 struct elf_link_hash_entry *h;
1393 Elf_Internal_Sym *sym;
1394 asection *sec;
1395 bfd_vma relocation;
1396 bfd_reloc_status_type r;
1397
1398 r_type = ELF32_R_TYPE (rel->r_info);
1399 if (r_type < 0 || r_type >= (int) R_VAX_max)
1400 {
1401 bfd_set_error (bfd_error_bad_value);
1402 return FALSE;
1403 }
1404 howto = howto_table + r_type;
1405
1406 r_symndx = ELF32_R_SYM (rel->r_info);
1407 h = NULL;
1408 sym = NULL;
1409 sec = NULL;
1410 if (r_symndx < symtab_hdr->sh_info)
1411 {
1412 sym = local_syms + r_symndx;
1413 sec = local_sections[r_symndx];
1414 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1415 }
1416 else
1417 {
1418 bfd_boolean unresolved_reloc;
1419 bfd_boolean warned;
1420
1421 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1422 r_symndx, symtab_hdr, sym_hashes,
1423 h, sec, relocation,
1424 unresolved_reloc, warned);
1425
1426 if ((h->root.type == bfd_link_hash_defined
1427 || h->root.type == bfd_link_hash_defweak)
1428 && ((r_type == R_VAX_PLT32
1429 && h->plt.offset != (bfd_vma) -1
1430 && !h->forced_local
1431 && elf_hash_table (info)->dynamic_sections_created)
1432 || (r_type == R_VAX_GOT32
1433 && h->got.offset != (bfd_vma) -1
1434 && !h->forced_local
1435 && elf_hash_table (info)->dynamic_sections_created
1436 && (! info->shared
1437 || (! info->symbolic && h->dynindx != -1)
1438 || !h->def_regular))
1439 || (info->shared
1440 && ((! info->symbolic && h->dynindx != -1)
1441 || !h->def_regular)
1442 && ((input_section->flags & SEC_ALLOC) != 0
1443 /* DWARF will emit R_VAX_32 relocations in its
1444 sections against symbols defined externally
1445 in shared libraries. We can't do anything
1446 with them here. */
1447
1448 || ((input_section->flags & SEC_DEBUGGING) != 0
1449 && h->def_dynamic))
1450 && (r_type == R_VAX_8
1451 || r_type == R_VAX_16
1452 || r_type == R_VAX_32))))
1453 /* In these cases, we don't need the relocation
1454 value. We check specially because in some
1455 obscure cases sec->output_section will be NULL. */
1456 relocation = 0;
1457 }
1458
1459 if (sec != NULL && elf_discarded_section (sec))
1460 {
1461 /* For relocs against symbols from removed linkonce sections,
1462 or sections discarded by a linker script, we just want the
1463 section contents zeroed. Avoid any special processing. */
1464 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1465 rel->r_info = 0;
1466 rel->r_addend = 0;
1467 continue;
1468 }
1469
1470 if (info->relocatable)
1471 continue;
1472
1473 switch (r_type)
1474 {
1475 case R_VAX_GOT32:
1476 /* Relocation is to the address of the entry for this symbol
1477 in the global offset table. */
1478 if (h == NULL
1479 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1480 || h->got.offset == (bfd_vma) -1
1481 || h->forced_local)
1482 break;
1483
1484 /* Relocation is the offset of the entry for this symbol in
1485 the global offset table. */
1486
1487 {
1488 bfd_boolean dyn;
1489 bfd_vma off;
1490
1491 if (sgot == NULL)
1492 {
1493 sgot = bfd_get_section_by_name (dynobj, ".got");
1494 BFD_ASSERT (sgot != NULL);
1495 }
1496
1497 BFD_ASSERT (h != NULL);
1498 off = h->got.offset;
1499 BFD_ASSERT (off != (bfd_vma) -1);
1500 BFD_ASSERT (off < sgot->size);
1501
1502 dyn = elf_hash_table (info)->dynamic_sections_created;
1503 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1504 || (info->shared
1505 && SYMBOL_REFERENCES_LOCAL (info, h)))
1506 {
1507 /* The symbol was forced to be local
1508 because of a version file.. We must initialize
1509 this entry in the global offset table. Since
1510 the offset must always be a multiple of 4, we
1511 use the least significant bit to record whether
1512 we have initialized it already.
1513
1514 When doing a dynamic link, we create a .rela.got
1515 relocation entry to initialize the value. This
1516 is done in the finish_dynamic_symbol routine. */
1517 if ((off & 1) != 0)
1518 off &= ~1;
1519 else
1520 {
1521 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1522 sgot->contents + off);
1523 h->got.offset |= 1;
1524 }
1525 } else {
1526 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1527 }
1528
1529 relocation = sgot->output_offset + off;
1530 /* The GOT relocation uses the addend. */
1531 rel->r_addend = 0;
1532
1533 /* Change the reference to be indirect. */
1534 contents[rel->r_offset - 1] |= 0x10;
1535 relocation += sgot->output_section->vma;
1536 }
1537 break;
1538
1539 case R_VAX_PC32:
1540 /* If we are creating an executable and the function this
1541 reloc refers to is in a shared lib, then we made a PLT
1542 entry for this symbol and need to handle the reloc like
1543 a PLT reloc. */
1544 if (info->shared)
1545 goto r_vax_pc32_shared;
1546 /* Fall through. */
1547 case R_VAX_PLT32:
1548 /* Relocation is to the entry for this symbol in the
1549 procedure linkage table. */
1550
1551 /* Resolve a PLTxx reloc against a local symbol directly,
1552 without using the procedure linkage table. */
1553 if (h == NULL
1554 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1555 || h->forced_local)
1556 break;
1557
1558 if (h->plt.offset == (bfd_vma) -1
1559 || !elf_hash_table (info)->dynamic_sections_created)
1560 {
1561 /* We didn't make a PLT entry for this symbol. This
1562 happens when statically linking PIC code, or when
1563 using -Bsymbolic. */
1564 break;
1565 }
1566
1567 if (splt == NULL)
1568 {
1569 splt = bfd_get_section_by_name (dynobj, ".plt");
1570 BFD_ASSERT (splt != NULL);
1571 }
1572
1573 if (sgotplt == NULL)
1574 {
1575 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1576 BFD_ASSERT (sgotplt != NULL);
1577 }
1578
1579 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1580
1581 /* Get the offset into the .got table of the entry that
1582 corresponds to this function. Each .got entry is 4 bytes.
1583 The first two are reserved. */
1584 got_offset = (plt_index + 3) * 4;
1585
1586 /* We want the relocation to point into the .got.plt instead
1587 of the plt itself. */
1588 relocation = (sgotplt->output_section->vma
1589 + sgotplt->output_offset
1590 + got_offset);
1591 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1592 if (rel->r_addend == 2)
1593 {
1594 h->plt.offset |= 1;
1595 }
1596 else if (rel->r_addend != 0)
1597 (*_bfd_error_handler)
1598 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1599 bfd_get_filename (input_bfd), rel->r_addend,
1600 h->root.root.string,
1601 bfd_get_section_name (input_bfd, input_section));
1602 rel->r_addend = 0;
1603
1604 break;
1605
1606 case R_VAX_PC8:
1607 case R_VAX_PC16:
1608 r_vax_pc32_shared:
1609 if (h == NULL
1610 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1611 || h->forced_local)
1612 break;
1613 /* Fall through. */
1614 case R_VAX_8:
1615 case R_VAX_16:
1616 case R_VAX_32:
1617 if (info->shared
1618 && r_symndx != 0
1619 && (input_section->flags & SEC_ALLOC) != 0
1620 && ((r_type != R_VAX_PC8
1621 && r_type != R_VAX_PC16
1622 && r_type != R_VAX_PC32)
1623 || ((input_section->flags & SEC_CODE)
1624 && (!info->symbolic
1625 || (!h->def_regular && h->type != STT_SECTION)))))
1626 {
1627 Elf_Internal_Rela outrel;
1628 bfd_byte *loc;
1629 bfd_boolean skip, relocate;
1630
1631 /* When generating a shared object, these relocations
1632 are copied into the output file to be resolved at run
1633 time. */
1634 if (sreloc == NULL)
1635 {
1636 sreloc = _bfd_elf_get_dynamic_reloc_section
1637 (input_bfd, input_section, /*rela?*/ TRUE);
1638 if (sreloc == NULL)
1639 return FALSE;
1640 }
1641
1642 skip = FALSE;
1643 relocate = FALSE;
1644
1645 outrel.r_offset =
1646 _bfd_elf_section_offset (output_bfd, info, input_section,
1647 rel->r_offset);
1648 if (outrel.r_offset == (bfd_vma) -1)
1649 skip = TRUE;
1650 if (outrel.r_offset == (bfd_vma) -2)
1651 skip = TRUE, relocate = TRUE;
1652 outrel.r_offset += (input_section->output_section->vma
1653 + input_section->output_offset);
1654
1655 if (skip)
1656 memset (&outrel, 0, sizeof outrel);
1657 /* h->dynindx may be -1 if the symbol was marked to
1658 become local. */
1659 else if (h != NULL
1660 && ((! info->symbolic && h->dynindx != -1)
1661 || !h->def_regular))
1662 {
1663 BFD_ASSERT (h->dynindx != -1);
1664 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1665 outrel.r_addend = relocation + rel->r_addend;
1666 }
1667 else
1668 {
1669 if (r_type == R_VAX_32)
1670 {
1671 relocate = TRUE;
1672 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1673 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1674 &contents[rel->r_offset]) == 0);
1675 outrel.r_addend = relocation + rel->r_addend;
1676 }
1677 else
1678 {
1679 long indx;
1680
1681 if (bfd_is_abs_section (sec))
1682 indx = 0;
1683 else if (sec == NULL || sec->owner == NULL)
1684 {
1685 bfd_set_error (bfd_error_bad_value);
1686 return FALSE;
1687 }
1688 else
1689 {
1690 asection *osec;
1691
1692 /* We are turning this relocation into one
1693 against a section symbol. It would be
1694 proper to subtract the symbol's value,
1695 osec->vma, from the emitted reloc addend,
1696 but ld.so expects buggy relocs. */
1697 osec = sec->output_section;
1698 indx = elf_section_data (osec)->dynindx;
1699 if (indx == 0)
1700 {
1701 struct elf_link_hash_table *htab;
1702 htab = elf_hash_table (info);
1703 osec = htab->text_index_section;
1704 indx = elf_section_data (osec)->dynindx;
1705 }
1706 BFD_ASSERT (indx != 0);
1707 }
1708
1709 outrel.r_info = ELF32_R_INFO (indx, r_type);
1710 outrel.r_addend = relocation + rel->r_addend;
1711 }
1712 }
1713
1714 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1715 ".text") != 0 ||
1716 (info->shared
1717 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1718 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1719 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1720 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1721 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1722 {
1723 if (h != NULL)
1724 (*_bfd_error_handler)
1725 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1726 bfd_get_filename (input_bfd), howto->name,
1727 h->root.root.string,
1728 bfd_get_section_name (input_bfd, input_section));
1729 else
1730 (*_bfd_error_handler)
1731 (_("%s: warning: %s relocation to 0x%x from %s section"),
1732 bfd_get_filename (input_bfd), howto->name,
1733 outrel.r_addend,
1734 bfd_get_section_name (input_bfd, input_section));
1735 }
1736 loc = sreloc->contents;
1737 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1738 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1739
1740 /* This reloc will be computed at runtime, so there's no
1741 need to do anything now, except for R_VAX_32
1742 relocations that have been turned into
1743 R_VAX_RELATIVE. */
1744 if (!relocate)
1745 continue;
1746 }
1747
1748 break;
1749
1750 case R_VAX_GNU_VTINHERIT:
1751 case R_VAX_GNU_VTENTRY:
1752 /* These are no-ops in the end. */
1753 continue;
1754
1755 default:
1756 break;
1757 }
1758
1759 /* VAX PCREL relocations are from the end of relocation, not the start.
1760 So subtract the difference from the relocation amount since we can't
1761 add it to the offset. */
1762 if (howto->pc_relative && howto->pcrel_offset)
1763 relocation -= bfd_get_reloc_size(howto);
1764
1765 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1766 contents, rel->r_offset,
1767 relocation, rel->r_addend);
1768
1769 if (r != bfd_reloc_ok)
1770 {
1771 switch (r)
1772 {
1773 default:
1774 case bfd_reloc_outofrange:
1775 abort ();
1776 case bfd_reloc_overflow:
1777 {
1778 const char *name;
1779
1780 if (h != NULL)
1781 name = NULL;
1782 else
1783 {
1784 name = bfd_elf_string_from_elf_section (input_bfd,
1785 symtab_hdr->sh_link,
1786 sym->st_name);
1787 if (name == NULL)
1788 return FALSE;
1789 if (*name == '\0')
1790 name = bfd_section_name (input_bfd, sec);
1791 }
1792 if (!(info->callbacks->reloc_overflow
1793 (info, (h ? &h->root : NULL), name, howto->name,
1794 (bfd_vma) 0, input_bfd, input_section,
1795 rel->r_offset)))
1796 return FALSE;
1797 }
1798 break;
1799 }
1800 }
1801 }
1802
1803 return TRUE;
1804 }
1805
1806 /* Finish up dynamic symbol handling. We set the contents of various
1807 dynamic sections here. */
1808
1809 static bfd_boolean
1810 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1811 struct elf_link_hash_entry *h,
1812 Elf_Internal_Sym *sym)
1813 {
1814 bfd *dynobj;
1815
1816 dynobj = elf_hash_table (info)->dynobj;
1817
1818 if (h->plt.offset != (bfd_vma) -1)
1819 {
1820 asection *splt;
1821 asection *sgot;
1822 asection *srela;
1823 bfd_vma plt_index;
1824 bfd_vma got_offset;
1825 bfd_vma addend;
1826 Elf_Internal_Rela rela;
1827 bfd_byte *loc;
1828
1829 /* This symbol has an entry in the procedure linkage table. Set
1830 it up. */
1831 BFD_ASSERT (h->dynindx != -1);
1832
1833 splt = bfd_get_section_by_name (dynobj, ".plt");
1834 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1835 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1836 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1837
1838 addend = 2 * (h->plt.offset & 1);
1839 h->plt.offset &= ~1;
1840
1841 /* Get the index in the procedure linkage table which
1842 corresponds to this symbol. This is the index of this symbol
1843 in all the symbols for which we are making plt entries. The
1844 first entry in the procedure linkage table is reserved. */
1845 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1846
1847 /* Get the offset into the .got table of the entry that
1848 corresponds to this function. Each .got entry is 4 bytes.
1849 The first two are reserved. */
1850 got_offset = (plt_index + 3) * 4;
1851
1852 /* Fill in the entry in the procedure linkage table. */
1853 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1854 PLT_ENTRY_SIZE);
1855
1856 /* The offset is relative to the first extension word. */
1857 bfd_put_32 (output_bfd,
1858 -(h->plt.offset + 8),
1859 splt->contents + h->plt.offset + 4);
1860
1861 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1862 splt->contents + h->plt.offset + 8);
1863
1864 /* Fill in the entry in the global offset table. */
1865 bfd_put_32 (output_bfd,
1866 (splt->output_section->vma
1867 + splt->output_offset
1868 + h->plt.offset) + addend,
1869 sgot->contents + got_offset);
1870
1871 /* Fill in the entry in the .rela.plt section. */
1872 rela.r_offset = (sgot->output_section->vma
1873 + sgot->output_offset
1874 + got_offset);
1875 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1876 rela.r_addend = addend;
1877 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1878 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1879
1880 if (!h->def_regular)
1881 {
1882 /* Mark the symbol as undefined, rather than as defined in
1883 the .plt section. Leave the value alone. */
1884 sym->st_shndx = SHN_UNDEF;
1885 }
1886 }
1887
1888 if (h->got.offset != (bfd_vma) -1)
1889 {
1890 asection *sgot;
1891 asection *srela;
1892 Elf_Internal_Rela rela;
1893 bfd_byte *loc;
1894
1895 /* This symbol has an entry in the global offset table. Set it
1896 up. */
1897 sgot = bfd_get_section_by_name (dynobj, ".got");
1898 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1899 BFD_ASSERT (sgot != NULL && srela != NULL);
1900
1901 rela.r_offset = (sgot->output_section->vma
1902 + sgot->output_offset
1903 + (h->got.offset &~ 1));
1904
1905 /* If the symbol was forced to be local because of a version file
1906 locally we just want to emit a RELATIVE reloc. The entry in
1907 the global offset table will already have been initialized in
1908 the relocate_section function. */
1909 if (info->shared
1910 && h->dynindx == -1
1911 && h->def_regular)
1912 {
1913 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1914 }
1915 else
1916 {
1917 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1918 }
1919 rela.r_addend = bfd_get_signed_32 (output_bfd,
1920 (sgot->contents
1921 + (h->got.offset & ~1)));
1922
1923 loc = srela->contents;
1924 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1925 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1926 }
1927
1928 if (h->needs_copy)
1929 {
1930 asection *s;
1931 Elf_Internal_Rela rela;
1932 bfd_byte *loc;
1933
1934 /* This symbol needs a copy reloc. Set it up. */
1935 BFD_ASSERT (h->dynindx != -1
1936 && (h->root.type == bfd_link_hash_defined
1937 || h->root.type == bfd_link_hash_defweak));
1938
1939 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1940 ".rela.bss");
1941 BFD_ASSERT (s != NULL);
1942
1943 rela.r_offset = (h->root.u.def.value
1944 + h->root.u.def.section->output_section->vma
1945 + h->root.u.def.section->output_offset);
1946 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1947 rela.r_addend = 0;
1948 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1949 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1950 }
1951
1952 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1953 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1954 || h == elf_hash_table (info)->hgot)
1955 sym->st_shndx = SHN_ABS;
1956
1957 return TRUE;
1958 }
1959
1960 /* Finish up the dynamic sections. */
1961
1962 static bfd_boolean
1963 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1964 {
1965 bfd *dynobj;
1966 asection *sgot;
1967 asection *sdyn;
1968
1969 dynobj = elf_hash_table (info)->dynobj;
1970
1971 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1972 BFD_ASSERT (sgot != NULL);
1973 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1974
1975 if (elf_hash_table (info)->dynamic_sections_created)
1976 {
1977 asection *splt;
1978 Elf32_External_Dyn *dyncon, *dynconend;
1979
1980 splt = bfd_get_section_by_name (dynobj, ".plt");
1981 BFD_ASSERT (splt != NULL && sdyn != NULL);
1982
1983 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1984 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1985 for (; dyncon < dynconend; dyncon++)
1986 {
1987 Elf_Internal_Dyn dyn;
1988 const char *name;
1989 asection *s;
1990
1991 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1992
1993 switch (dyn.d_tag)
1994 {
1995 default:
1996 break;
1997
1998 case DT_PLTGOT:
1999 name = ".got";
2000 goto get_vma;
2001 case DT_JMPREL:
2002 name = ".rela.plt";
2003 get_vma:
2004 s = bfd_get_section_by_name (output_bfd, name);
2005 BFD_ASSERT (s != NULL);
2006 dyn.d_un.d_ptr = s->vma;
2007 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2008 break;
2009
2010 case DT_PLTRELSZ:
2011 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2012 BFD_ASSERT (s != NULL);
2013 dyn.d_un.d_val = s->size;
2014 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2015 break;
2016
2017 case DT_RELASZ:
2018 /* The procedure linkage table relocs (DT_JMPREL) should
2019 not be included in the overall relocs (DT_RELA).
2020 Therefore, we override the DT_RELASZ entry here to
2021 make it not include the JMPREL relocs. Since the
2022 linker script arranges for .rela.plt to follow all
2023 other relocation sections, we don't have to worry
2024 about changing the DT_RELA entry. */
2025 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2026 if (s != NULL)
2027 dyn.d_un.d_val -= s->size;
2028 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2029 break;
2030 }
2031 }
2032
2033 /* Fill in the first entry in the procedure linkage table. */
2034 if (splt->size > 0)
2035 {
2036 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2037 bfd_put_32 (output_bfd,
2038 (sgot->output_section->vma
2039 + sgot->output_offset + 4
2040 - (splt->output_section->vma + 6)),
2041 splt->contents + 2);
2042 bfd_put_32 (output_bfd,
2043 (sgot->output_section->vma
2044 + sgot->output_offset + 8
2045 - (splt->output_section->vma + 12)),
2046 splt->contents + 8);
2047 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2048 = PLT_ENTRY_SIZE;
2049 }
2050 }
2051
2052 /* Fill in the first three entries in the global offset table. */
2053 if (sgot->size > 0)
2054 {
2055 if (sdyn == NULL)
2056 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2057 else
2058 bfd_put_32 (output_bfd,
2059 sdyn->output_section->vma + sdyn->output_offset,
2060 sgot->contents);
2061 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2062 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2063 }
2064
2065 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2066
2067 return TRUE;
2068 }
2069
2070 static enum elf_reloc_type_class
2071 elf_vax_reloc_type_class (const Elf_Internal_Rela *rela)
2072 {
2073 switch ((int) ELF32_R_TYPE (rela->r_info))
2074 {
2075 case R_VAX_RELATIVE:
2076 return reloc_class_relative;
2077 case R_VAX_JMP_SLOT:
2078 return reloc_class_plt;
2079 case R_VAX_COPY:
2080 return reloc_class_copy;
2081 default:
2082 return reloc_class_normal;
2083 }
2084 }
2085
2086 static bfd_vma
2087 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
2088 const arelent *rel ATTRIBUTE_UNUSED)
2089 {
2090 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
2091 }
2092
2093 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2094 #define TARGET_LITTLE_NAME "elf32-vax"
2095 #define ELF_MACHINE_CODE EM_VAX
2096 #define ELF_MAXPAGESIZE 0x1000
2097
2098 #define elf_backend_create_dynamic_sections \
2099 _bfd_elf_create_dynamic_sections
2100 #define bfd_elf32_bfd_link_hash_table_create \
2101 elf_vax_link_hash_table_create
2102 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2103
2104 #define elf_backend_check_relocs elf_vax_check_relocs
2105 #define elf_backend_adjust_dynamic_symbol \
2106 elf_vax_adjust_dynamic_symbol
2107 #define elf_backend_size_dynamic_sections \
2108 elf_vax_size_dynamic_sections
2109 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2110 #define elf_backend_relocate_section elf_vax_relocate_section
2111 #define elf_backend_finish_dynamic_symbol \
2112 elf_vax_finish_dynamic_symbol
2113 #define elf_backend_finish_dynamic_sections \
2114 elf_vax_finish_dynamic_sections
2115 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2116 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2117 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2118 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2119 #define bfd_elf32_bfd_merge_private_bfd_data \
2120 elf32_vax_merge_private_bfd_data
2121 #define bfd_elf32_bfd_set_private_flags \
2122 elf32_vax_set_private_flags
2123 #define bfd_elf32_bfd_print_private_bfd_data \
2124 elf32_vax_print_private_bfd_data
2125
2126 #define elf_backend_can_gc_sections 1
2127 #define elf_backend_want_got_plt 1
2128 #define elf_backend_plt_readonly 1
2129 #define elf_backend_want_plt_sym 0
2130 #define elf_backend_got_header_size 16
2131 #define elf_backend_rela_normal 1
2132
2133 #include "elf32-target.h"
GDB Binutils - Deliverables
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