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