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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 Free Software Foundation, Inc.
4 Contributed by Matt Thomas <matt@3am-software.com>.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21
22 #include "bfd.h"
23 #include "sysdep.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/vax.h"
28
29 static reloc_howto_type *reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31 static void rtype_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static struct bfd_hash_entry *elf_vax_link_hash_newfunc
34 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
35 static struct bfd_link_hash_table *elf_vax_link_hash_table_create
36 PARAMS ((bfd *));
37 static bfd_boolean elf_vax_check_relocs
38 PARAMS ((bfd *, struct bfd_link_info *, asection *,
39 const Elf_Internal_Rela *));
40 static asection *elf_vax_gc_mark_hook
41 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
42 struct elf_link_hash_entry *, Elf_Internal_Sym *));
43 static bfd_boolean elf_vax_gc_sweep_hook
44 PARAMS ((bfd *, struct bfd_link_info *, asection *,
45 const Elf_Internal_Rela *));
46 static bfd_boolean elf_vax_adjust_dynamic_symbol
47 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
48 static bfd_boolean elf_vax_size_dynamic_sections
49 PARAMS ((bfd *, struct bfd_link_info *));
50 static bfd_boolean elf_vax_relocate_section
51 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
52 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
53 static bfd_boolean elf_vax_finish_dynamic_symbol
54 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
55 Elf_Internal_Sym *));
56 static bfd_boolean elf_vax_finish_dynamic_sections
57 PARAMS ((bfd *, struct bfd_link_info *));
58
59 static bfd_boolean elf32_vax_set_private_flags
60 PARAMS ((bfd *, flagword));
61 static bfd_boolean elf32_vax_merge_private_bfd_data
62 PARAMS ((bfd *, bfd *));
63 static bfd_boolean elf32_vax_print_private_bfd_data
64 PARAMS ((bfd *, PTR));
65
66 static reloc_howto_type howto_table[] = {
67 HOWTO (R_VAX_NONE, /* type */
68 0, /* rightshift */
69 0, /* size (0 = byte, 1 = short, 2 = long) */
70 0, /* bitsize */
71 FALSE, /* pc_relative */
72 0, /* bitpos */
73 complain_overflow_dont, /* complain_on_overflow */
74 bfd_elf_generic_reloc, /* special_function */
75 "R_VAX_NONE", /* name */
76 FALSE, /* partial_inplace */
77 0, /* src_mask */
78 0x00000000, /* dst_mask */
79 FALSE), /* pcrel_offset */
80
81 HOWTO (R_VAX_32, /* type */
82 0, /* rightshift */
83 2, /* size (0 = byte, 1 = short, 2 = long) */
84 32, /* bitsize */
85 FALSE, /* pc_relative */
86 0, /* bitpos */
87 complain_overflow_bitfield, /* complain_on_overflow */
88 bfd_elf_generic_reloc, /* special_function */
89 "R_VAX_32", /* name */
90 FALSE, /* partial_inplace */
91 0, /* src_mask */
92 0xffffffff, /* dst_mask */
93 FALSE), /* pcrel_offset */
94
95 HOWTO (R_VAX_16, /* type */
96 0, /* rightshift */
97 1, /* size (0 = byte, 1 = short, 2 = long) */
98 16, /* bitsize */
99 FALSE, /* pc_relative */
100 0, /* bitpos */
101 complain_overflow_bitfield, /* complain_on_overflow */
102 bfd_elf_generic_reloc, /* special_function */
103 "R_VAX_16", /* name */
104 FALSE, /* partial_inplace */
105 0, /* src_mask */
106 0x0000ffff, /* dst_mask */
107 FALSE), /* pcrel_offset */
108
109 HOWTO (R_VAX_8, /* type */
110 0, /* rightshift */
111 0, /* size (0 = byte, 1 = short, 2 = long) */
112 8, /* bitsize */
113 FALSE, /* pc_relative */
114 0, /* bitpos */
115 complain_overflow_bitfield, /* complain_on_overflow */
116 bfd_elf_generic_reloc, /* special_function */
117 "R_VAX_8", /* name */
118 FALSE, /* partial_inplace */
119 0, /* src_mask */
120 0x000000ff, /* dst_mask */
121 FALSE), /* pcrel_offset */
122
123 HOWTO (R_VAX_PC32, /* type */
124 0, /* rightshift */
125 2, /* size (0 = byte, 1 = short, 2 = long) */
126 32, /* bitsize */
127 TRUE, /* pc_relative */
128 0, /* bitpos */
129 complain_overflow_bitfield, /* complain_on_overflow */
130 bfd_elf_generic_reloc, /* special_function */
131 "R_VAX_PC32", /* name */
132 FALSE, /* partial_inplace */
133 0, /* src_mask */
134 0xffffffff, /* dst_mask */
135 TRUE), /* pcrel_offset */
136
137 HOWTO (R_VAX_PC16, /* type */
138 0, /* rightshift */
139 1, /* size (0 = byte, 1 = short, 2 = long) */
140 16, /* bitsize */
141 TRUE, /* pc_relative */
142 0, /* bitpos */
143 complain_overflow_signed, /* complain_on_overflow */
144 bfd_elf_generic_reloc, /* special_function */
145 "R_VAX_PC16", /* name */
146 FALSE, /* partial_inplace */
147 0, /* src_mask */
148 0x0000ffff, /* dst_mask */
149 TRUE), /* pcrel_offset */
150
151 HOWTO (R_VAX_PC8, /* type */
152 0, /* rightshift */
153 0, /* size (0 = byte, 1 = short, 2 = long) */
154 8, /* bitsize */
155 TRUE, /* pc_relative */
156 0, /* bitpos */
157 complain_overflow_signed, /* complain_on_overflow */
158 bfd_elf_generic_reloc, /* special_function */
159 "R_VAX_PC8", /* name */
160 FALSE, /* partial_inplace */
161 0, /* src_mask */
162 0x000000ff, /* dst_mask */
163 TRUE), /* pcrel_offset */
164
165 HOWTO (R_VAX_GOT32, /* type */
166 0, /* rightshift */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
168 32, /* bitsize */
169 TRUE, /* pc_relative */
170 0, /* bitpos */
171 complain_overflow_bitfield, /* complain_on_overflow */
172 bfd_elf_generic_reloc, /* special_function */
173 "R_VAX_GOT32", /* name */
174 FALSE, /* partial_inplace */
175 0, /* src_mask */
176 0xffffffff, /* dst_mask */
177 TRUE), /* pcrel_offset */
178
179 EMPTY_HOWTO (-1),
180 EMPTY_HOWTO (-1),
181 EMPTY_HOWTO (-1),
182 EMPTY_HOWTO (-1),
183 EMPTY_HOWTO (-1),
184
185 HOWTO (R_VAX_PLT32, /* type */
186 0, /* rightshift */
187 2, /* size (0 = byte, 1 = short, 2 = long) */
188 32, /* bitsize */
189 TRUE, /* pc_relative */
190 0, /* bitpos */
191 complain_overflow_bitfield, /* complain_on_overflow */
192 bfd_elf_generic_reloc, /* special_function */
193 "R_VAX_PLT32", /* name */
194 FALSE, /* partial_inplace */
195 0, /* src_mask */
196 0xffffffff, /* dst_mask */
197 TRUE), /* pcrel_offset */
198
199 EMPTY_HOWTO (-1),
200 EMPTY_HOWTO (-1),
201 EMPTY_HOWTO (-1),
202 EMPTY_HOWTO (-1),
203 EMPTY_HOWTO (-1),
204
205 HOWTO (R_VAX_COPY, /* type */
206 0, /* rightshift */
207 0, /* size (0 = byte, 1 = short, 2 = long) */
208 0, /* bitsize */
209 FALSE, /* pc_relative */
210 0, /* bitpos */
211 complain_overflow_dont, /* complain_on_overflow */
212 bfd_elf_generic_reloc, /* special_function */
213 "R_VAX_COPY", /* name */
214 FALSE, /* partial_inplace */
215 0, /* src_mask */
216 0xffffffff, /* dst_mask */
217 FALSE), /* pcrel_offset */
218
219 HOWTO (R_VAX_GLOB_DAT, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_dont, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_VAX_GLOB_DAT", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0xffffffff, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 HOWTO (R_VAX_JMP_SLOT, /* type */
234 0, /* rightshift */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
236 32, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_dont, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_VAX_JMP_SLOT", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0xffffffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 HOWTO (R_VAX_RELATIVE, /* type */
248 0, /* rightshift */
249 2, /* size (0 = byte, 1 = short, 2 = long) */
250 32, /* bitsize */
251 FALSE, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_dont, /* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_VAX_RELATIVE", /* name */
256 FALSE, /* partial_inplace */
257 0, /* src_mask */
258 0xffffffff, /* dst_mask */
259 FALSE), /* pcrel_offset */
260
261 /* GNU extension to record C++ vtable hierarchy */
262 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
263 0, /* rightshift */
264 2, /* size (0 = byte, 1 = short, 2 = long) */
265 0, /* bitsize */
266 FALSE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_dont, /* complain_on_overflow */
269 NULL, /* special_function */
270 "R_VAX_GNU_VTINHERIT", /* name */
271 FALSE, /* partial_inplace */
272 0, /* src_mask */
273 0, /* dst_mask */
274 FALSE), /* pcrel_offset */
275
276 /* GNU extension to record C++ vtable member usage */
277 HOWTO (R_VAX_GNU_VTENTRY, /* type */
278 0, /* rightshift */
279 2, /* size (0 = byte, 1 = short, 2 = long) */
280 0, /* bitsize */
281 FALSE, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_dont, /* complain_on_overflow */
284 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
285 "R_VAX_GNU_VTENTRY", /* name */
286 FALSE, /* partial_inplace */
287 0, /* src_mask */
288 0, /* dst_mask */
289 FALSE), /* pcrel_offset */
290 };
291
292 static void
293 rtype_to_howto (abfd, cache_ptr, dst)
294 bfd *abfd ATTRIBUTE_UNUSED;
295 arelent *cache_ptr;
296 Elf_Internal_Rela *dst;
297 {
298 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
299 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
300 }
301
302 #define elf_info_to_howto rtype_to_howto
303
304 static const struct
305 {
306 bfd_reloc_code_real_type bfd_val;
307 int elf_val;
308 } reloc_map[] = {
309 { BFD_RELOC_NONE, R_VAX_NONE },
310 { BFD_RELOC_32, R_VAX_32 },
311 { BFD_RELOC_16, R_VAX_16 },
312 { BFD_RELOC_8, R_VAX_8 },
313 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
314 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
315 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
316 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
317 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
318 { BFD_RELOC_NONE, R_VAX_COPY },
319 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
320 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
321 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
322 { BFD_RELOC_CTOR, R_VAX_32 },
323 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
324 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
325 };
326
327 static reloc_howto_type *
328 reloc_type_lookup (abfd, code)
329 bfd *abfd ATTRIBUTE_UNUSED;
330 bfd_reloc_code_real_type code;
331 {
332 unsigned int i;
333 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
334 {
335 if (reloc_map[i].bfd_val == code)
336 return &howto_table[reloc_map[i].elf_val];
337 }
338 return 0;
339 }
340
341 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
342 #define ELF_ARCH bfd_arch_vax
343 /* end code generated by elf.el */
344 \f
345 /* Functions for the VAX ELF linker. */
346
347 /* The name of the dynamic interpreter. This is put in the .interp
348 section. */
349
350 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
351
352 /* The size in bytes of an entry in the procedure linkage table. */
353
354 #define PLT_ENTRY_SIZE 12
355
356 /* The first entry in a procedure linkage table looks like this. See
357 the SVR4 ABI VAX supplement to see how this works. */
358
359 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
360 {
361 0xdd, 0xef, /* pushl l^ */
362 0, 0, 0, 0, /* offset to .plt.got + 4 */
363 0x17, 0xff, /* jmp @L^(pc) */
364 0, 0, 0, 0, /* offset to .plt.got + 8 */
365 };
366
367 /* Subsequent entries in a procedure linkage table look like this. */
368
369 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
370 {
371 0x40, 0x00, /* .word ^M<r6> */
372 0x16, 0xef, /* jsb L^(pc) */
373 0, 0, 0, 0, /* replaced with offset to start of .plt */
374 0, 0, 0, 0, /* index into .rela.plt */
375 };
376
377 /* The VAX linker needs to keep track of the number of relocs that it
378 decides to copy in check_relocs for each symbol. This is so that it
379 can discard PC relative relocs if it doesn't need them when linking
380 with -Bsymbolic. We store the information in a field extending the
381 regular ELF linker hash table. */
382
383 /* This structure keeps track of the number of PC relative relocs we have
384 copied for a given symbol. */
385
386 struct elf_vax_pcrel_relocs_copied
387 {
388 /* Next section. */
389 struct elf_vax_pcrel_relocs_copied *next;
390 /* A section in dynobj. */
391 asection *section;
392 /* Number of relocs copied in this section. */
393 bfd_size_type count;
394 };
395
396 /* VAX ELF linker hash entry. */
397
398 struct elf_vax_link_hash_entry
399 {
400 struct elf_link_hash_entry root;
401
402 /* Number of PC relative relocs copied for this symbol. */
403 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
404
405 bfd_vma got_addend;
406 };
407
408 /* VAX ELF linker hash table. */
409
410 struct elf_vax_link_hash_table
411 {
412 struct elf_link_hash_table root;
413 };
414
415 /* Declare this now that the above structures are defined. */
416
417 static bfd_boolean elf_vax_discard_copies
418 PARAMS ((struct elf_vax_link_hash_entry *, PTR));
419
420 /* Declare this now that the above structures are defined. */
421
422 static bfd_boolean elf_vax_instantiate_got_entries
423 PARAMS ((struct elf_link_hash_entry *, PTR));
424
425 /* Traverse an VAX ELF linker hash table. */
426
427 #define elf_vax_link_hash_traverse(table, func, info) \
428 (elf_link_hash_traverse \
429 (&(table)->root, \
430 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
431 (info)))
432
433 /* Get the VAX ELF linker hash table from a link_info structure. */
434
435 #define elf_vax_hash_table(p) \
436 ((struct elf_vax_link_hash_table *) (p)->hash)
437
438 /* Create an entry in an VAX ELF linker hash table. */
439
440 static struct bfd_hash_entry *
441 elf_vax_link_hash_newfunc (entry, table, string)
442 struct bfd_hash_entry *entry;
443 struct bfd_hash_table *table;
444 const char *string;
445 {
446 struct elf_vax_link_hash_entry *ret =
447 (struct elf_vax_link_hash_entry *) entry;
448
449 /* Allocate the structure if it has not already been allocated by a
450 subclass. */
451 if (ret == (struct elf_vax_link_hash_entry *) NULL)
452 ret = ((struct elf_vax_link_hash_entry *)
453 bfd_hash_allocate (table,
454 sizeof (struct elf_vax_link_hash_entry)));
455 if (ret == (struct elf_vax_link_hash_entry *) NULL)
456 return (struct bfd_hash_entry *) ret;
457
458 /* Call the allocation method of the superclass. */
459 ret = ((struct elf_vax_link_hash_entry *)
460 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
461 table, string));
462 if (ret != (struct elf_vax_link_hash_entry *) NULL)
463 {
464 ret->pcrel_relocs_copied = NULL;
465 }
466
467 return (struct bfd_hash_entry *) ret;
468 }
469
470 /* Create an VAX ELF linker hash table. */
471
472 static struct bfd_link_hash_table *
473 elf_vax_link_hash_table_create (abfd)
474 bfd *abfd;
475 {
476 struct elf_vax_link_hash_table *ret;
477 bfd_size_type amt = sizeof (struct elf_vax_link_hash_table);
478
479 ret = (struct elf_vax_link_hash_table *) bfd_malloc (amt);
480 if (ret == (struct elf_vax_link_hash_table *) NULL)
481 return NULL;
482
483 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
484 elf_vax_link_hash_newfunc))
485 {
486 free (ret);
487 return NULL;
488 }
489
490 return &ret->root.root;
491 }
492
493 /* Keep vax-specific flags in the ELF header */
494 static bfd_boolean
495 elf32_vax_set_private_flags (abfd, flags)
496 bfd *abfd;
497 flagword flags;
498 {
499 elf_elfheader (abfd)->e_flags = flags;
500 elf_flags_init (abfd) = TRUE;
501 return TRUE;
502 }
503
504 /* Merge backend specific data from an object file to the output
505 object file when linking. */
506 static bfd_boolean
507 elf32_vax_merge_private_bfd_data (ibfd, obfd)
508 bfd *ibfd;
509 bfd *obfd;
510 {
511 flagword out_flags;
512 flagword in_flags;
513
514 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
515 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
516 return TRUE;
517
518 in_flags = elf_elfheader (ibfd)->e_flags;
519 out_flags = elf_elfheader (obfd)->e_flags;
520
521 if (!elf_flags_init (obfd))
522 {
523 elf_flags_init (obfd) = TRUE;
524 elf_elfheader (obfd)->e_flags = in_flags;
525 }
526
527 return TRUE;
528 }
529
530 /* Display the flags field */
531 static bfd_boolean
532 elf32_vax_print_private_bfd_data (abfd, ptr)
533 bfd *abfd;
534 PTR ptr;
535 {
536 FILE *file = (FILE *) ptr;
537
538 BFD_ASSERT (abfd != NULL && ptr != NULL);
539
540 /* Print normal ELF private data. */
541 _bfd_elf_print_private_bfd_data (abfd, ptr);
542
543 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
544
545 /* xgettext:c-format */
546 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
547
548 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
549 fprintf (file, _(" [nonpic]"));
550
551 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
552 fprintf (file, _(" [d-float]"));
553
554 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
555 fprintf (file, _(" [g-float]"));
556
557 fputc ('\n', file);
558
559 return TRUE;
560 }
561 /* Look through the relocs for a section during the first phase, and
562 allocate space in the global offset table or procedure linkage
563 table. */
564
565 static bfd_boolean
566 elf_vax_check_relocs (abfd, info, sec, relocs)
567 bfd *abfd;
568 struct bfd_link_info *info;
569 asection *sec;
570 const Elf_Internal_Rela *relocs;
571 {
572 bfd *dynobj;
573 Elf_Internal_Shdr *symtab_hdr;
574 struct elf_link_hash_entry **sym_hashes;
575 const Elf_Internal_Rela *rel;
576 const Elf_Internal_Rela *rel_end;
577 asection *sgot;
578 asection *srelgot;
579 asection *sreloc;
580
581 if (info->relocatable)
582 return TRUE;
583
584 dynobj = elf_hash_table (info)->dynobj;
585 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
586 sym_hashes = elf_sym_hashes (abfd);
587
588 sgot = NULL;
589 srelgot = NULL;
590 sreloc = NULL;
591
592 rel_end = relocs + sec->reloc_count;
593 for (rel = relocs; rel < rel_end; rel++)
594 {
595 unsigned long r_symndx;
596 struct elf_link_hash_entry *h;
597
598 r_symndx = ELF32_R_SYM (rel->r_info);
599
600 if (r_symndx < symtab_hdr->sh_info)
601 h = NULL;
602 else
603 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
604
605 switch (ELF32_R_TYPE (rel->r_info))
606 {
607 case R_VAX_GOT32:
608 if (h != NULL
609 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
610 break;
611
612 /* This symbol requires a global offset table entry. */
613
614 if (dynobj == NULL)
615 {
616 /* Create the .got section. */
617 elf_hash_table (info)->dynobj = dynobj = abfd;
618 if (!_bfd_elf_create_got_section (dynobj, info))
619 return FALSE;
620 }
621
622 if (sgot == NULL)
623 {
624 sgot = bfd_get_section_by_name (dynobj, ".got");
625 BFD_ASSERT (sgot != NULL);
626 }
627
628 if (srelgot == NULL
629 && (h != NULL || info->shared))
630 {
631 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
632 if (srelgot == NULL)
633 {
634 srelgot = bfd_make_section (dynobj, ".rela.got");
635 if (srelgot == NULL
636 || !bfd_set_section_flags (dynobj, srelgot,
637 (SEC_ALLOC
638 | SEC_LOAD
639 | SEC_HAS_CONTENTS
640 | SEC_IN_MEMORY
641 | SEC_LINKER_CREATED
642 | SEC_READONLY))
643 || !bfd_set_section_alignment (dynobj, srelgot, 2))
644 return FALSE;
645 }
646 }
647
648 if (h != NULL)
649 {
650 struct elf_vax_link_hash_entry *eh;
651
652 eh = (struct elf_vax_link_hash_entry *) h;
653 if (h->got.refcount == -1)
654 {
655 h->got.refcount = 1;
656 eh->got_addend = rel->r_addend;
657 }
658 else
659 {
660 h->got.refcount++;
661 if (eh->got_addend != (bfd_vma) rel->r_addend)
662 (*_bfd_error_handler)
663 (_("%s: warning: GOT addend of %ld to `%s' does not match previous GOT addend of %ld"),
664 bfd_get_filename (abfd), rel->r_addend,
665 h->root.root.string,
666 eh->got_addend);
667
668 }
669 }
670 break;
671
672 case R_VAX_PLT32:
673 /* This symbol requires a procedure linkage table entry. We
674 actually build the entry in adjust_dynamic_symbol,
675 because this might be a case of linking PIC code which is
676 never referenced by a dynamic object, in which case we
677 don't need to generate a procedure linkage table entry
678 after all. */
679
680 /* If this is a local symbol, we resolve it directly without
681 creating a procedure linkage table entry. */
682 if (h == NULL)
683 continue;
684
685 h->needs_plt = 1;
686 if (h->plt.refcount == -1)
687 h->plt.refcount = 1;
688 else
689 h->plt.refcount++;
690 break;
691
692 case R_VAX_PC8:
693 case R_VAX_PC16:
694 case R_VAX_PC32:
695 /* If we are creating a shared library and this is not a local
696 symbol, we need to copy the reloc into the shared library.
697 However when linking with -Bsymbolic and this is a global
698 symbol which is defined in an object we are including in the
699 link (i.e., DEF_REGULAR is set), then we can resolve the
700 reloc directly. At this point we have not seen all the input
701 files, so it is possible that DEF_REGULAR is not set now but
702 will be set later (it is never cleared). We account for that
703 possibility below by storing information in the
704 pcrel_relocs_copied field of the hash table entry. */
705 if (!(info->shared
706 && (sec->flags & SEC_ALLOC) != 0
707 && h != NULL
708 && (!info->symbolic
709 || !h->def_regular)))
710 {
711 if (h != NULL)
712 {
713 /* Make sure a plt entry is created for this symbol if
714 it turns out to be a function defined by a dynamic
715 object. */
716 if (h->plt.refcount == -1)
717 h->plt.refcount = 1;
718 else
719 h->plt.refcount++;
720 }
721 break;
722 }
723 /* Fall through. */
724 case R_VAX_8:
725 case R_VAX_16:
726 case R_VAX_32:
727 if (h != NULL)
728 {
729 /* Make sure a plt entry is created for this symbol if it
730 turns out to be a function defined by a dynamic object. */
731 if (h->plt.refcount == -1)
732 h->plt.refcount = 1;
733 else
734 h->plt.refcount++;
735 }
736
737 /* If we are creating a shared library, we need to copy the
738 reloc into the shared library. */
739 if (info->shared
740 && (sec->flags & SEC_ALLOC) != 0)
741 {
742 /* When creating a shared object, we must copy these
743 reloc types into the output file. We create a reloc
744 section in dynobj and make room for this reloc. */
745 if (sreloc == NULL)
746 {
747 const char *name;
748
749 name = (bfd_elf_string_from_elf_section
750 (abfd,
751 elf_elfheader (abfd)->e_shstrndx,
752 elf_section_data (sec)->rel_hdr.sh_name));
753 if (name == NULL)
754 return FALSE;
755
756 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
757 && strcmp (bfd_get_section_name (abfd, sec),
758 name + 5) == 0);
759
760 sreloc = bfd_get_section_by_name (dynobj, name);
761 if (sreloc == NULL)
762 {
763 sreloc = bfd_make_section (dynobj, name);
764 if (sreloc == NULL
765 || !bfd_set_section_flags (dynobj, sreloc,
766 (SEC_ALLOC
767 | SEC_LOAD
768 | SEC_HAS_CONTENTS
769 | SEC_IN_MEMORY
770 | SEC_LINKER_CREATED
771 | SEC_READONLY))
772 || !bfd_set_section_alignment (dynobj, sreloc, 2))
773 return FALSE;
774 }
775 if (sec->flags & SEC_READONLY)
776 info->flags |= DF_TEXTREL;
777 }
778
779 sreloc->size += sizeof (Elf32_External_Rela);
780
781 /* If we are linking with -Bsymbolic, we count the number of
782 PC relative relocations we have entered for this symbol,
783 so that we can discard them again if the symbol is later
784 defined by a regular object. Note that this function is
785 only called if we are using a vaxelf linker hash table,
786 which means that h is really a pointer to an
787 elf_vax_link_hash_entry. */
788 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
789 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
790 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
791 && info->symbolic)
792 {
793 struct elf_vax_link_hash_entry *eh;
794 struct elf_vax_pcrel_relocs_copied *p;
795
796 eh = (struct elf_vax_link_hash_entry *) h;
797
798 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
799 if (p->section == sreloc)
800 break;
801
802 if (p == NULL)
803 {
804 p = ((struct elf_vax_pcrel_relocs_copied *)
805 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
806 if (p == NULL)
807 return FALSE;
808 p->next = eh->pcrel_relocs_copied;
809 eh->pcrel_relocs_copied = p;
810 p->section = sreloc;
811 p->count = 0;
812 }
813
814 ++p->count;
815 }
816 }
817
818 break;
819
820 /* This relocation describes the C++ object vtable hierarchy.
821 Reconstruct it for later use during GC. */
822 case R_VAX_GNU_VTINHERIT:
823 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
824 return FALSE;
825 break;
826
827 /* This relocation describes which C++ vtable entries are actually
828 used. Record for later use during GC. */
829 case R_VAX_GNU_VTENTRY:
830 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
831 return FALSE;
832 break;
833
834 default:
835 break;
836 }
837 }
838
839 return TRUE;
840 }
841
842 /* Return the section that should be marked against GC for a given
843 relocation. */
844
845 static asection *
846 elf_vax_gc_mark_hook (sec, info, rel, h, sym)
847 asection *sec;
848 struct bfd_link_info *info ATTRIBUTE_UNUSED;
849 Elf_Internal_Rela *rel;
850 struct elf_link_hash_entry *h;
851 Elf_Internal_Sym *sym;
852 {
853 if (h != NULL)
854 {
855 switch (ELF32_R_TYPE (rel->r_info))
856 {
857 case R_VAX_GNU_VTINHERIT:
858 case R_VAX_GNU_VTENTRY:
859 break;
860
861 default:
862 switch (h->root.type)
863 {
864 default:
865 break;
866
867 case bfd_link_hash_defined:
868 case bfd_link_hash_defweak:
869 return h->root.u.def.section;
870
871 case bfd_link_hash_common:
872 return h->root.u.c.p->section;
873 }
874 }
875 }
876 else
877 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
878
879 return NULL;
880 }
881
882 /* Update the got entry reference counts for the section being removed. */
883
884 static bfd_boolean
885 elf_vax_gc_sweep_hook (abfd, info, sec, relocs)
886 bfd *abfd;
887 struct bfd_link_info *info;
888 asection *sec;
889 const Elf_Internal_Rela *relocs;
890 {
891 Elf_Internal_Shdr *symtab_hdr;
892 struct elf_link_hash_entry **sym_hashes;
893 const Elf_Internal_Rela *rel, *relend;
894 bfd *dynobj;
895
896 dynobj = elf_hash_table (info)->dynobj;
897 if (dynobj == NULL)
898 return TRUE;
899
900 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
901 sym_hashes = elf_sym_hashes (abfd);
902
903 relend = relocs + sec->reloc_count;
904 for (rel = relocs; rel < relend; rel++)
905 {
906 unsigned long r_symndx;
907 struct elf_link_hash_entry *h;
908
909 switch (ELF32_R_TYPE (rel->r_info))
910 {
911 case R_VAX_GOT32:
912 r_symndx = ELF32_R_SYM (rel->r_info);
913 if (r_symndx >= symtab_hdr->sh_info)
914 {
915 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
916 if (h->got.refcount > 0)
917 --h->got.refcount;
918 }
919 break;
920
921 case R_VAX_PLT32:
922 case R_VAX_PC8:
923 case R_VAX_PC16:
924 case R_VAX_PC32:
925 case R_VAX_8:
926 case R_VAX_16:
927 case R_VAX_32:
928 r_symndx = ELF32_R_SYM (rel->r_info);
929 if (r_symndx >= symtab_hdr->sh_info)
930 {
931 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
932 if (h->plt.refcount > 0)
933 --h->plt.refcount;
934 }
935 break;
936
937 default:
938 break;
939 }
940 }
941
942 return TRUE;
943 }
944
945 /* Adjust a symbol defined by a dynamic object and referenced by a
946 regular object. The current definition is in some section of the
947 dynamic object, but we're not including those sections. We have to
948 change the definition to something the rest of the link can
949 understand. */
950
951 static bfd_boolean
952 elf_vax_adjust_dynamic_symbol (info, h)
953 struct bfd_link_info *info;
954 struct elf_link_hash_entry *h;
955 {
956 bfd *dynobj;
957 asection *s;
958 unsigned int power_of_two;
959
960 dynobj = elf_hash_table (info)->dynobj;
961
962 /* Make sure we know what is going on here. */
963 BFD_ASSERT (dynobj != NULL
964 && (h->needs_plt
965 || h->u.weakdef != NULL
966 || (h->def_dynamic
967 && h->ref_regular
968 && !h->def_regular)));
969
970 /* If this is a function, put it in the procedure linkage table. We
971 will fill in the contents of the procedure linkage table later,
972 when we know the address of the .got section. */
973 if (h->type == STT_FUNC
974 || h->needs_plt)
975 {
976 if (! info->shared
977 && !h->def_dynamic
978 && !h->ref_dynamic
979 /* We must always create the plt entry if it was referenced
980 by a PLTxxO relocation. In this case we already recorded
981 it as a dynamic symbol. */
982 && h->dynindx == -1)
983 {
984 /* This case can occur if we saw a PLTxx reloc in an input
985 file, but the symbol was never referred to by a dynamic
986 object. In such a case, we don't actually need to build
987 a procedure linkage table, and we can just do a PCxx
988 reloc instead. */
989 BFD_ASSERT (h->needs_plt);
990 h->plt.offset = (bfd_vma) -1;
991 return TRUE;
992 }
993
994 /* GC may have rendered this entry unused. */
995 if (h->plt.refcount <= 0)
996 {
997 h->needs_plt = 0;
998 h->plt.offset = (bfd_vma) -1;
999 return TRUE;
1000 }
1001
1002 /* Make sure this symbol is output as a dynamic symbol. */
1003 if (h->dynindx == -1)
1004 {
1005 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1006 return FALSE;
1007 }
1008
1009 s = bfd_get_section_by_name (dynobj, ".plt");
1010 BFD_ASSERT (s != NULL);
1011
1012 /* If this is the first .plt entry, make room for the special
1013 first entry. */
1014 if (s->size == 0)
1015 {
1016 s->size += PLT_ENTRY_SIZE;
1017 }
1018
1019 /* If this symbol is not defined in a regular file, and we are
1020 not generating a shared library, then set the symbol to this
1021 location in the .plt. This is required to make function
1022 pointers compare as equal between the normal executable and
1023 the shared library. */
1024 if (!info->shared
1025 && !h->def_regular)
1026 {
1027 h->root.u.def.section = s;
1028 h->root.u.def.value = s->size;
1029 }
1030
1031 h->plt.offset = s->size;
1032
1033 /* Make room for this entry. */
1034 s->size += PLT_ENTRY_SIZE;
1035
1036 /* We also need to make an entry in the .got.plt section, which
1037 will be placed in the .got section by the linker script. */
1038
1039 s = bfd_get_section_by_name (dynobj, ".got.plt");
1040 BFD_ASSERT (s != NULL);
1041 s->size += 4;
1042
1043 /* We also need to make an entry in the .rela.plt section. */
1044
1045 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1046 BFD_ASSERT (s != NULL);
1047 s->size += sizeof (Elf32_External_Rela);
1048
1049 return TRUE;
1050 }
1051
1052 /* Reinitialize the plt offset now that it is not used as a reference
1053 count any more. */
1054 h->plt.offset = (bfd_vma) -1;
1055
1056 /* If this is a weak symbol, and there is a real definition, the
1057 processor independent code will have arranged for us to see the
1058 real definition first, and we can just use the same value. */
1059 if (h->u.weakdef != NULL)
1060 {
1061 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1062 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1063 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1064 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1065 return TRUE;
1066 }
1067
1068 /* This is a reference to a symbol defined by a dynamic object which
1069 is not a function. */
1070
1071 /* If we are creating a shared library, we must presume that the
1072 only references to the symbol are via the global offset table.
1073 For such cases we need not do anything here; the relocations will
1074 be handled correctly by relocate_section. */
1075 if (info->shared)
1076 return TRUE;
1077
1078 /* We must allocate the symbol in our .dynbss section, which will
1079 become part of the .bss section of the executable. There will be
1080 an entry for this symbol in the .dynsym section. The dynamic
1081 object will contain position independent code, so all references
1082 from the dynamic object to this symbol will go through the global
1083 offset table. The dynamic linker will use the .dynsym entry to
1084 determine the address it must put in the global offset table, so
1085 both the dynamic object and the regular object will refer to the
1086 same memory location for the variable. */
1087
1088 s = bfd_get_section_by_name (dynobj, ".dynbss");
1089 BFD_ASSERT (s != NULL);
1090
1091 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1092 copy the initial value out of the dynamic object and into the
1093 runtime process image. We need to remember the offset into the
1094 .rela.bss section we are going to use. */
1095 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1096 {
1097 asection *srel;
1098
1099 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1100 BFD_ASSERT (srel != NULL);
1101 srel->size += sizeof (Elf32_External_Rela);
1102 h->needs_copy = 1;
1103 }
1104
1105 /* We need to figure out the alignment required for this symbol. I
1106 have no idea how ELF linkers handle this. */
1107 power_of_two = bfd_log2 (h->size);
1108 if (power_of_two > 3)
1109 power_of_two = 3;
1110
1111 /* Apply the required alignment. */
1112 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1113 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1114 {
1115 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
1116 return FALSE;
1117 }
1118
1119 /* Define the symbol as being at this point in the section. */
1120 h->root.u.def.section = s;
1121 h->root.u.def.value = s->size;
1122
1123 /* Increment the section size to make room for the symbol. */
1124 s->size += h->size;
1125
1126 return TRUE;
1127 }
1128
1129 /* Set the sizes of the dynamic sections. */
1130
1131 static bfd_boolean
1132 elf_vax_size_dynamic_sections (output_bfd, info)
1133 bfd *output_bfd;
1134 struct bfd_link_info *info;
1135 {
1136 bfd *dynobj;
1137 asection *s;
1138 bfd_boolean plt;
1139 bfd_boolean relocs;
1140 bfd_boolean reltext;
1141
1142 dynobj = elf_hash_table (info)->dynobj;
1143 BFD_ASSERT (dynobj != NULL);
1144
1145 if (elf_hash_table (info)->dynamic_sections_created)
1146 {
1147 /* Set the contents of the .interp section to the interpreter. */
1148 if (info->executable)
1149 {
1150 s = bfd_get_section_by_name (dynobj, ".interp");
1151 BFD_ASSERT (s != NULL);
1152 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1153 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1154 }
1155 }
1156 else
1157 {
1158 /* We may have created entries in the .rela.got and .got sections.
1159 However, if we are not creating the dynamic sections, we will
1160 not actually use these entries. Reset the size of .rela.got
1161 and .got, which will cause it to get stripped from the output
1162 file below. */
1163 s = bfd_get_section_by_name (dynobj, ".rela.got");
1164 if (s != NULL)
1165 s->size = 0;
1166 s = bfd_get_section_by_name (dynobj, ".got.plt");
1167 if (s != NULL)
1168 s->size = 0;
1169 s = bfd_get_section_by_name (dynobj, ".got");
1170 if (s != NULL)
1171 s->size = 0;
1172 }
1173
1174 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1175 relative relocs against symbols defined in a regular object. We
1176 allocated space for them in the check_relocs routine, but we will not
1177 fill them in in the relocate_section routine. */
1178 if (info->shared && info->symbolic)
1179 elf_vax_link_hash_traverse (elf_vax_hash_table (info),
1180 elf_vax_discard_copies,
1181 (PTR) NULL);
1182
1183 /* If this is a -Bsymbolic shared link or a static link, we need to
1184 discard all the got entries we've recorded. Otherwise, we need to
1185 instantiate (allocate space for them). */
1186 elf_link_hash_traverse (elf_hash_table (info),
1187 elf_vax_instantiate_got_entries,
1188 (PTR) info);
1189
1190 /* The check_relocs and adjust_dynamic_symbol entry points have
1191 determined the sizes of the various dynamic sections. Allocate
1192 memory for them. */
1193 plt = FALSE;
1194 relocs = FALSE;
1195 reltext = FALSE;
1196 for (s = dynobj->sections; s != NULL; s = s->next)
1197 {
1198 const char *name;
1199 bfd_boolean strip;
1200
1201 if ((s->flags & SEC_LINKER_CREATED) == 0)
1202 continue;
1203
1204 /* It's OK to base decisions on the section name, because none
1205 of the dynobj section names depend upon the input files. */
1206 name = bfd_get_section_name (dynobj, s);
1207
1208 strip = FALSE;
1209
1210 if (strcmp (name, ".plt") == 0)
1211 {
1212 if (s->size == 0)
1213 {
1214 /* Strip this section if we don't need it; see the
1215 comment below. */
1216 strip = TRUE;
1217 }
1218 else
1219 {
1220 /* Remember whether there is a PLT. */
1221 plt = TRUE;
1222 }
1223 }
1224 else if (strncmp (name, ".rela", 5) == 0)
1225 {
1226 if (s->size == 0)
1227 {
1228 /* If we don't need this section, strip it from the
1229 output file. This is mostly to handle .rela.bss and
1230 .rela.plt. We must create both sections in
1231 create_dynamic_sections, because they must be created
1232 before the linker maps input sections to output
1233 sections. The linker does that before
1234 adjust_dynamic_symbol is called, and it is that
1235 function which decides whether anything needs to go
1236 into these sections. */
1237 strip = TRUE;
1238 }
1239 else
1240 {
1241 asection *target;
1242
1243 /* Remember whether there are any reloc sections other
1244 than .rela.plt. */
1245 if (strcmp (name, ".rela.plt") != 0)
1246 {
1247 const char *outname;
1248
1249 relocs = TRUE;
1250
1251 /* If this relocation section applies to a read only
1252 section, then we probably need a DT_TEXTREL
1253 entry. .rela.plt is actually associated with
1254 .got.plt, which is never readonly. */
1255 outname = bfd_get_section_name (output_bfd,
1256 s->output_section);
1257 target = bfd_get_section_by_name (output_bfd, outname + 5);
1258 if (target != NULL
1259 && (target->flags & SEC_READONLY) != 0
1260 && (target->flags & SEC_ALLOC) != 0)
1261 reltext = TRUE;
1262 }
1263
1264 /* We use the reloc_count field as a counter if we need
1265 to copy relocs into the output file. */
1266 s->reloc_count = 0;
1267 }
1268 }
1269 else if (strncmp (name, ".got", 4) != 0)
1270 {
1271 /* It's not one of our sections, so don't allocate space. */
1272 continue;
1273 }
1274
1275 if (strip)
1276 {
1277 _bfd_strip_section_from_output (info, s);
1278 continue;
1279 }
1280
1281 /* Allocate memory for the section contents. */
1282 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1283 if (s->contents == NULL && s->size != 0)
1284 return FALSE;
1285 }
1286
1287 if (elf_hash_table (info)->dynamic_sections_created)
1288 {
1289 /* Add some entries to the .dynamic section. We fill in the
1290 values later, in elf_vax_finish_dynamic_sections, but we
1291 must add the entries now so that we get the correct size for
1292 the .dynamic section. The DT_DEBUG entry is filled in by the
1293 dynamic linker and used by the debugger. */
1294 #define add_dynamic_entry(TAG, VAL) \
1295 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1296
1297 if (!info->shared)
1298 {
1299 if (!add_dynamic_entry (DT_DEBUG, 0))
1300 return FALSE;
1301 }
1302
1303 if (plt)
1304 {
1305 if (!add_dynamic_entry (DT_PLTGOT, 0)
1306 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1307 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1308 || !add_dynamic_entry (DT_JMPREL, 0))
1309 return FALSE;
1310 }
1311
1312 if (relocs)
1313 {
1314 if (!add_dynamic_entry (DT_RELA, 0)
1315 || !add_dynamic_entry (DT_RELASZ, 0)
1316 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1317 return FALSE;
1318 }
1319
1320 if (reltext || (info->flags & DF_TEXTREL) != 0)
1321 {
1322 if (!add_dynamic_entry (DT_TEXTREL, 0))
1323 return FALSE;
1324 }
1325 }
1326 #undef add_dynamic_entry
1327
1328 return TRUE;
1329 }
1330
1331 /* This function is called via elf_vax_link_hash_traverse if we are
1332 creating a shared object with -Bsymbolic. It discards the space
1333 allocated to copy PC relative relocs against symbols which are defined
1334 in regular objects. We allocated space for them in the check_relocs
1335 routine, but we won't fill them in in the relocate_section routine. */
1336
1337 static bfd_boolean
1338 elf_vax_discard_copies (h, ignore)
1339 struct elf_vax_link_hash_entry *h;
1340 PTR ignore ATTRIBUTE_UNUSED;
1341 {
1342 struct elf_vax_pcrel_relocs_copied *s;
1343
1344 if (h->root.root.type == bfd_link_hash_warning)
1345 h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
1346
1347 /* We only discard relocs for symbols defined in a regular object. */
1348 if (!h->root.def_regular)
1349 return TRUE;
1350
1351 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1352 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1353
1354 return TRUE;
1355 }
1356
1357 /* This function is called via elf_link_hash_traverse. It looks for entries
1358 that have GOT or PLT (.GOT) references. If creating a static object or a
1359 shared object with -Bsymbolic, it resets the reference count back to 0
1360 and sets the offset to -1 so normal PC32 relocation will be done. If
1361 creating a shared object or executable, space in the .got and .rela.got
1362 will be reserved for the symbol. */
1363
1364 static bfd_boolean
1365 elf_vax_instantiate_got_entries (h, infoptr)
1366 struct elf_link_hash_entry *h;
1367 PTR infoptr;
1368 {
1369 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1370 bfd *dynobj;
1371 asection *sgot;
1372 asection *srelgot;
1373
1374 /* We don't care about non-GOT (and non-PLT) entries. */
1375 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1376 return TRUE;
1377
1378 dynobj = elf_hash_table (info)->dynobj;
1379 if (dynobj == NULL)
1380 return TRUE;
1381
1382 sgot = bfd_get_section_by_name (dynobj, ".got");
1383 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1384
1385 if (!elf_hash_table (info)->dynamic_sections_created
1386 || (info->shared && info->symbolic))
1387 {
1388 h->got.refcount = 0;
1389 h->got.offset = (bfd_vma) -1;
1390 h->plt.refcount = 0;
1391 h->plt.offset = (bfd_vma) -1;
1392 }
1393 else if (h->got.refcount > 0)
1394 {
1395 /* Make sure this symbol is output as a dynamic symbol. */
1396 if (h->dynindx == -1)
1397 {
1398 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1399 return FALSE;
1400 }
1401
1402 /* Allocate space in the .got and .rela.got sections. */
1403 sgot->size += 4;
1404 srelgot->size += sizeof (Elf32_External_Rela);
1405 }
1406
1407 return TRUE;
1408 }
1409
1410 /* Relocate an VAX ELF section. */
1411
1412 static bfd_boolean
1413 elf_vax_relocate_section (output_bfd, info, input_bfd, input_section,
1414 contents, relocs, local_syms, local_sections)
1415 bfd *output_bfd;
1416 struct bfd_link_info *info;
1417 bfd *input_bfd;
1418 asection *input_section;
1419 bfd_byte *contents;
1420 Elf_Internal_Rela *relocs;
1421 Elf_Internal_Sym *local_syms;
1422 asection **local_sections;
1423 {
1424 bfd *dynobj;
1425 Elf_Internal_Shdr *symtab_hdr;
1426 struct elf_link_hash_entry **sym_hashes;
1427 bfd_vma *local_got_offsets;
1428 bfd_vma plt_index;
1429 bfd_vma got_offset;
1430 asection *sgot;
1431 asection *splt;
1432 asection *sgotplt;
1433 asection *sreloc;
1434 Elf_Internal_Rela *rel;
1435 Elf_Internal_Rela *relend;
1436
1437 if (info->relocatable)
1438 return TRUE;
1439
1440 dynobj = elf_hash_table (info)->dynobj;
1441 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1442 sym_hashes = elf_sym_hashes (input_bfd);
1443 local_got_offsets = elf_local_got_offsets (input_bfd);
1444
1445 sgot = NULL;
1446 splt = NULL;
1447 sgotplt = NULL;
1448 sreloc = NULL;
1449
1450 rel = relocs;
1451 relend = relocs + input_section->reloc_count;
1452 for (; rel < relend; rel++)
1453 {
1454 int r_type;
1455 reloc_howto_type *howto;
1456 unsigned long r_symndx;
1457 struct elf_link_hash_entry *h;
1458 Elf_Internal_Sym *sym;
1459 asection *sec;
1460 bfd_vma relocation;
1461 bfd_reloc_status_type r;
1462
1463 r_type = ELF32_R_TYPE (rel->r_info);
1464 if (r_type < 0 || r_type >= (int) R_VAX_max)
1465 {
1466 bfd_set_error (bfd_error_bad_value);
1467 return FALSE;
1468 }
1469 howto = howto_table + r_type;
1470
1471 /* This is a final link. */
1472 r_symndx = ELF32_R_SYM (rel->r_info);
1473 h = NULL;
1474 sym = NULL;
1475 sec = NULL;
1476 if (r_symndx < symtab_hdr->sh_info)
1477 {
1478 sym = local_syms + r_symndx;
1479 sec = local_sections[r_symndx];
1480 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1481 }
1482 else
1483 {
1484 bfd_boolean unresolved_reloc;
1485 bfd_boolean warned;
1486
1487 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1488 r_symndx, symtab_hdr, sym_hashes,
1489 h, sec, relocation,
1490 unresolved_reloc, warned);
1491
1492 if ((h->root.type == bfd_link_hash_defined
1493 || h->root.type == bfd_link_hash_defweak)
1494 && ((r_type == R_VAX_PLT32
1495 && h->plt.offset != (bfd_vma) -1
1496 && elf_hash_table (info)->dynamic_sections_created)
1497 || (r_type == R_VAX_GOT32
1498 && strcmp (h->root.root.string,
1499 "_GLOBAL_OFFSET_TABLE_") != 0
1500 && elf_hash_table (info)->dynamic_sections_created
1501 && (! info->shared
1502 || (! info->symbolic && h->dynindx != -1)
1503 || !h->def_regular))
1504 || (info->shared
1505 && ((! info->symbolic && h->dynindx != -1)
1506 || !h->def_regular)
1507 && ((input_section->flags & SEC_ALLOC) != 0
1508 /* DWARF will emit R_VAX_32 relocations in its
1509 sections against symbols defined externally
1510 in shared libraries. We can't do anything
1511 with them here. */
1512
1513 || ((input_section->flags & SEC_DEBUGGING) != 0
1514 && h->def_dynamic))
1515 && (r_type == R_VAX_8
1516 || r_type == R_VAX_16
1517 || r_type == R_VAX_32
1518 || r_type == R_VAX_PC8
1519 || r_type == R_VAX_PC16
1520 || r_type == R_VAX_PC32))))
1521 /* In these cases, we don't need the relocation
1522 value. We check specially because in some
1523 obscure cases sec->output_section will be NULL. */
1524 relocation = 0;
1525 }
1526
1527 switch (r_type)
1528 {
1529 case R_VAX_GOT32:
1530 /* Relocation is to the address of the entry for this symbol
1531 in the global offset table. */
1532 if (h == NULL || h->got.offset == (bfd_vma) -1)
1533 break;
1534
1535 /* Relocation is the offset of the entry for this symbol in
1536 the global offset table. */
1537
1538 {
1539 bfd_vma off;
1540
1541 if (sgot == NULL)
1542 {
1543 sgot = bfd_get_section_by_name (dynobj, ".got");
1544 BFD_ASSERT (sgot != NULL);
1545 }
1546
1547 BFD_ASSERT (h != NULL);
1548 off = h->got.offset;
1549 BFD_ASSERT (off != (bfd_vma) -1);
1550 BFD_ASSERT (off < sgot->size);
1551
1552 if (info->shared
1553 && h->dynindx == -1
1554 && h->def_regular)
1555 {
1556 /* The symbol was forced to be local
1557 because of a version file.. We must initialize
1558 this entry in the global offset table. Since
1559 the offset must always be a multiple of 4, we
1560 use the least significant bit to record whether
1561 we have initialized it already.
1562
1563 When doing a dynamic link, we create a .rela.got
1564 relocation entry to initialize the value. This
1565 is done in the finish_dynamic_symbol routine. */
1566 if ((off & 1) != 0)
1567 off &= ~1;
1568 else
1569 {
1570 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1571 sgot->contents + off);
1572 h->got.offset |= 1;
1573 }
1574 } else {
1575 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1576 }
1577
1578 relocation = sgot->output_offset + off;
1579 /* The GOT relocation uses the addend. */
1580 rel->r_addend = 0;
1581
1582 /* Change the reference to be indirect. */
1583 contents[rel->r_offset - 1] |= 0x10;
1584 relocation += sgot->output_section->vma;
1585 }
1586 break;
1587
1588 case R_VAX_PLT32:
1589 /* Relocation is to the entry for this symbol in the
1590 procedure linkage table. */
1591
1592 /* Resolve a PLTxx reloc against a local symbol directly,
1593 without using the procedure linkage table. */
1594 if (h == NULL)
1595 break;
1596
1597 if (h->plt.offset == (bfd_vma) -1
1598 || !elf_hash_table (info)->dynamic_sections_created)
1599 {
1600 /* We didn't make a PLT entry for this symbol. This
1601 happens when statically linking PIC code, or when
1602 using -Bsymbolic. */
1603 break;
1604 }
1605
1606 if (splt == NULL)
1607 {
1608 splt = bfd_get_section_by_name (dynobj, ".plt");
1609 BFD_ASSERT (splt != NULL);
1610 }
1611
1612 if (sgotplt == NULL)
1613 {
1614 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1615 BFD_ASSERT (splt != NULL);
1616 }
1617
1618 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1619
1620 /* Get the offset into the .got table of the entry that
1621 corresponds to this function. Each .got entry is 4 bytes.
1622 The first two are reserved. */
1623 got_offset = (plt_index + 3) * 4;
1624
1625 /* We want the relocate to point into the .got.plt instead
1626 of the plt itself. */
1627 relocation = (sgotplt->output_section->vma
1628 + sgotplt->output_offset
1629 + got_offset);
1630 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1631 if (rel->r_addend == 2)
1632 {
1633 h->plt.offset |= 1;
1634 }
1635 else if (rel->r_addend != 0)
1636 (*_bfd_error_handler)
1637 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1638 bfd_get_filename (input_bfd), rel->r_addend,
1639 h->root.root.string,
1640 bfd_get_section_name (input_bfd, input_section));
1641 rel->r_addend = 0;
1642
1643 break;
1644
1645 case R_VAX_PC8:
1646 case R_VAX_PC16:
1647 case R_VAX_PC32:
1648 if (h == NULL)
1649 break;
1650 /* Fall through. */
1651 case R_VAX_8:
1652 case R_VAX_16:
1653 case R_VAX_32:
1654 if (info->shared
1655 && r_symndx != 0
1656 && (input_section->flags & SEC_ALLOC) != 0
1657 && ((r_type != R_VAX_PC8
1658 && r_type != R_VAX_PC16
1659 && r_type != R_VAX_PC32)
1660 || (!info->symbolic
1661 || !h->def_regular)))
1662 {
1663 Elf_Internal_Rela outrel;
1664 bfd_byte *loc;
1665 bfd_boolean skip, relocate;
1666
1667 /* When generating a shared object, these relocations
1668 are copied into the output file to be resolved at run
1669 time. */
1670 if (sreloc == NULL)
1671 {
1672 const char *name;
1673
1674 name = (bfd_elf_string_from_elf_section
1675 (input_bfd,
1676 elf_elfheader (input_bfd)->e_shstrndx,
1677 elf_section_data (input_section)->rel_hdr.sh_name));
1678 if (name == NULL)
1679 return FALSE;
1680
1681 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1682 && strcmp (bfd_get_section_name (input_bfd,
1683 input_section),
1684 name + 5) == 0);
1685
1686 sreloc = bfd_get_section_by_name (dynobj, name);
1687 BFD_ASSERT (sreloc != NULL);
1688 }
1689
1690 skip = FALSE;
1691 relocate = FALSE;
1692
1693 outrel.r_offset =
1694 _bfd_elf_section_offset (output_bfd, info, input_section,
1695 rel->r_offset);
1696 if (outrel.r_offset == (bfd_vma) -1)
1697 skip = TRUE;
1698 if (outrel.r_offset == (bfd_vma) -2)
1699 skip = TRUE, relocate = TRUE;
1700 outrel.r_offset += (input_section->output_section->vma
1701 + input_section->output_offset);
1702
1703 if (skip)
1704 memset (&outrel, 0, sizeof outrel);
1705 /* h->dynindx may be -1 if the symbol was marked to
1706 become local. */
1707 else if (h != NULL
1708 && ((! info->symbolic && h->dynindx != -1)
1709 || !h->def_regular))
1710 {
1711 BFD_ASSERT (h->dynindx != -1);
1712 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1713 outrel.r_addend = relocation + rel->r_addend;
1714 }
1715 else
1716 {
1717 if (r_type == R_VAX_32)
1718 {
1719 relocate = TRUE;
1720 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1721 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1722 &contents[rel->r_offset]) == 0);
1723 outrel.r_addend = relocation + rel->r_addend;
1724 }
1725 else
1726 {
1727 long indx;
1728
1729 if (bfd_is_abs_section (sec))
1730 indx = 0;
1731 else if (sec == NULL || sec->owner == NULL)
1732 {
1733 bfd_set_error (bfd_error_bad_value);
1734 return FALSE;
1735 }
1736 else
1737 {
1738 asection *osec;
1739
1740 osec = sec->output_section;
1741 indx = elf_section_data (osec)->dynindx;
1742 BFD_ASSERT (indx > 0);
1743 }
1744
1745 outrel.r_info = ELF32_R_INFO (indx, r_type);
1746 outrel.r_addend = relocation + rel->r_addend;
1747 }
1748 }
1749
1750 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1751 ".text") != 0 ||
1752 (info->shared
1753 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1754 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1755 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1756 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1757 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1758 {
1759 if (h != NULL)
1760 (*_bfd_error_handler)
1761 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1762 bfd_get_filename (input_bfd), howto->name,
1763 h->root.root.string,
1764 bfd_get_section_name (input_bfd, input_section));
1765 else
1766 (*_bfd_error_handler)
1767 (_("%s: warning: %s relocation to 0x%x from %s section"),
1768 bfd_get_filename (input_bfd), howto->name,
1769 outrel.r_addend,
1770 bfd_get_section_name (input_bfd, input_section));
1771 }
1772 loc = sreloc->contents;
1773 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1774 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1775
1776 /* This reloc will be computed at runtime, so there's no
1777 need to do anything now, except for R_VAX_32
1778 relocations that have been turned into
1779 R_VAX_RELATIVE. */
1780 if (!relocate)
1781 continue;
1782 }
1783
1784 break;
1785
1786 case R_VAX_GNU_VTINHERIT:
1787 case R_VAX_GNU_VTENTRY:
1788 /* These are no-ops in the end. */
1789 continue;
1790
1791 default:
1792 break;
1793 }
1794
1795 /* VAX PCREL relocations are from the end of relocation, not the start.
1796 So subtract the difference from the relocation amount since we can't
1797 add it to the offset. */
1798 if (howto->pc_relative && howto->pcrel_offset)
1799 relocation -= bfd_get_reloc_size(howto);
1800
1801 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1802 contents, rel->r_offset,
1803 relocation, rel->r_addend);
1804
1805 if (r != bfd_reloc_ok)
1806 {
1807 switch (r)
1808 {
1809 default:
1810 case bfd_reloc_outofrange:
1811 abort ();
1812 case bfd_reloc_overflow:
1813 {
1814 const char *name;
1815
1816 if (h != NULL)
1817 name = h->root.root.string;
1818 else
1819 {
1820 name = bfd_elf_string_from_elf_section (input_bfd,
1821 symtab_hdr->sh_link,
1822 sym->st_name);
1823 if (name == NULL)
1824 return FALSE;
1825 if (*name == '\0')
1826 name = bfd_section_name (input_bfd, sec);
1827 }
1828 if (!(info->callbacks->reloc_overflow
1829 (info, name, howto->name, (bfd_vma) 0,
1830 input_bfd, input_section, rel->r_offset)))
1831 return FALSE;
1832 }
1833 break;
1834 }
1835 }
1836 }
1837
1838 return TRUE;
1839 }
1840
1841 /* Finish up dynamic symbol handling. We set the contents of various
1842 dynamic sections here. */
1843
1844 static bfd_boolean
1845 elf_vax_finish_dynamic_symbol (output_bfd, info, h, sym)
1846 bfd *output_bfd;
1847 struct bfd_link_info *info;
1848 struct elf_link_hash_entry *h;
1849 Elf_Internal_Sym *sym;
1850 {
1851 bfd *dynobj;
1852
1853 dynobj = elf_hash_table (info)->dynobj;
1854
1855 if (h->plt.offset != (bfd_vma) -1)
1856 {
1857 asection *splt;
1858 asection *sgot;
1859 asection *srela;
1860 bfd_vma plt_index;
1861 bfd_vma got_offset;
1862 bfd_vma addend;
1863 Elf_Internal_Rela rela;
1864 bfd_byte *loc;
1865
1866 /* This symbol has an entry in the procedure linkage table. Set
1867 it up. */
1868 BFD_ASSERT (h->dynindx != -1);
1869
1870 splt = bfd_get_section_by_name (dynobj, ".plt");
1871 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1872 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1873 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1874
1875 addend = 2 * (h->plt.offset & 1);
1876 h->plt.offset &= ~1;
1877
1878 /* Get the index in the procedure linkage table which
1879 corresponds to this symbol. This is the index of this symbol
1880 in all the symbols for which we are making plt entries. The
1881 first entry in the procedure linkage table is reserved. */
1882 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1883
1884 /* Get the offset into the .got table of the entry that
1885 corresponds to this function. Each .got entry is 4 bytes.
1886 The first two are reserved. */
1887 got_offset = (plt_index + 3) * 4;
1888
1889 /* Fill in the entry in the procedure linkage table. */
1890 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1891 PLT_ENTRY_SIZE);
1892
1893 /* The offset is relative to the first extension word. */
1894 bfd_put_32 (output_bfd,
1895 -(h->plt.offset + 8),
1896 splt->contents + h->plt.offset + 4);
1897
1898 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1899 splt->contents + h->plt.offset + 8);
1900
1901 /* Fill in the entry in the global offset table. */
1902 bfd_put_32 (output_bfd,
1903 (splt->output_section->vma
1904 + splt->output_offset
1905 + h->plt.offset) + addend,
1906 sgot->contents + got_offset);
1907
1908 /* Fill in the entry in the .rela.plt section. */
1909 rela.r_offset = (sgot->output_section->vma
1910 + sgot->output_offset
1911 + got_offset);
1912 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1913 rela.r_addend = addend;
1914 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1915 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1916
1917 if (!h->def_regular)
1918 {
1919 /* Mark the symbol as undefined, rather than as defined in
1920 the .plt section. Leave the value alone. */
1921 sym->st_shndx = SHN_UNDEF;
1922 }
1923 }
1924
1925 if (h->got.offset != (bfd_vma) -1)
1926 {
1927 asection *sgot;
1928 asection *srela;
1929 Elf_Internal_Rela rela;
1930 bfd_byte *loc;
1931
1932 /* This symbol has an entry in the global offset table. Set it
1933 up. */
1934 sgot = bfd_get_section_by_name (dynobj, ".got");
1935 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1936 BFD_ASSERT (sgot != NULL && srela != NULL);
1937
1938 rela.r_offset = (sgot->output_section->vma
1939 + sgot->output_offset
1940 + (h->got.offset &~ 1));
1941
1942 /* If the symbol was forced to be local because of a version file
1943 locally we just want to emit a RELATIVE reloc. The entry in
1944 the global offset table will already have been initialized in
1945 the relocate_section function. */
1946 if (info->shared
1947 && h->dynindx == -1
1948 && h->def_regular)
1949 {
1950 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1951 }
1952 else
1953 {
1954 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1955 }
1956 rela.r_addend = bfd_get_signed_32 (output_bfd,
1957 (sgot->contents
1958 + (h->got.offset & ~1)));
1959
1960 loc = srela->contents;
1961 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1962 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1963 }
1964
1965 if (h->needs_copy)
1966 {
1967 asection *s;
1968 Elf_Internal_Rela rela;
1969 bfd_byte *loc;
1970
1971 /* This symbol needs a copy reloc. Set it up. */
1972 BFD_ASSERT (h->dynindx != -1
1973 && (h->root.type == bfd_link_hash_defined
1974 || h->root.type == bfd_link_hash_defweak));
1975
1976 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1977 ".rela.bss");
1978 BFD_ASSERT (s != NULL);
1979
1980 rela.r_offset = (h->root.u.def.value
1981 + h->root.u.def.section->output_section->vma
1982 + h->root.u.def.section->output_offset);
1983 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1984 rela.r_addend = 0;
1985 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1986 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1987 }
1988
1989 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1990 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1991 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1992 sym->st_shndx = SHN_ABS;
1993
1994 return TRUE;
1995 }
1996
1997 /* Finish up the dynamic sections. */
1998
1999 static bfd_boolean
2000 elf_vax_finish_dynamic_sections (output_bfd, info)
2001 bfd *output_bfd;
2002 struct bfd_link_info *info;
2003 {
2004 bfd *dynobj;
2005 asection *sgot;
2006 asection *sdyn;
2007
2008 dynobj = elf_hash_table (info)->dynobj;
2009
2010 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2011 BFD_ASSERT (sgot != NULL);
2012 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2013
2014 if (elf_hash_table (info)->dynamic_sections_created)
2015 {
2016 asection *splt;
2017 Elf32_External_Dyn *dyncon, *dynconend;
2018
2019 splt = bfd_get_section_by_name (dynobj, ".plt");
2020 BFD_ASSERT (splt != NULL && sdyn != NULL);
2021
2022 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2023 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2024 for (; dyncon < dynconend; dyncon++)
2025 {
2026 Elf_Internal_Dyn dyn;
2027 const char *name;
2028 asection *s;
2029
2030 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2031
2032 switch (dyn.d_tag)
2033 {
2034 default:
2035 break;
2036
2037 case DT_PLTGOT:
2038 name = ".got";
2039 goto get_vma;
2040 case DT_JMPREL:
2041 name = ".rela.plt";
2042 get_vma:
2043 s = bfd_get_section_by_name (output_bfd, name);
2044 BFD_ASSERT (s != NULL);
2045 dyn.d_un.d_ptr = s->vma;
2046 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2047 break;
2048
2049 case DT_PLTRELSZ:
2050 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2051 BFD_ASSERT (s != NULL);
2052 dyn.d_un.d_val = s->size;
2053 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2054 break;
2055
2056 case DT_RELASZ:
2057 /* The procedure linkage table relocs (DT_JMPREL) should
2058 not be included in the overall relocs (DT_RELA).
2059 Therefore, we override the DT_RELASZ entry here to
2060 make it not include the JMPREL relocs. Since the
2061 linker script arranges for .rela.plt to follow all
2062 other relocation sections, we don't have to worry
2063 about changing the DT_RELA entry. */
2064 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2065 if (s != NULL)
2066 dyn.d_un.d_val -= s->size;
2067 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2068 break;
2069 }
2070 }
2071
2072 /* Fill in the first entry in the procedure linkage table. */
2073 if (splt->size > 0)
2074 {
2075 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2076 bfd_put_32 (output_bfd,
2077 (sgot->output_section->vma
2078 + sgot->output_offset + 4
2079 - (splt->output_section->vma + 6)),
2080 splt->contents + 2);
2081 bfd_put_32 (output_bfd,
2082 (sgot->output_section->vma
2083 + sgot->output_offset + 8
2084 - (splt->output_section->vma + 12)),
2085 splt->contents + 8);
2086 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2087 = PLT_ENTRY_SIZE;
2088 }
2089 }
2090
2091 /* Fill in the first three entries in the global offset table. */
2092 if (sgot->size > 0)
2093 {
2094 if (sdyn == NULL)
2095 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2096 else
2097 bfd_put_32 (output_bfd,
2098 sdyn->output_section->vma + sdyn->output_offset,
2099 sgot->contents);
2100 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2101 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2102 }
2103
2104 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2105
2106 return TRUE;
2107 }
2108
2109 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2110 #define TARGET_LITTLE_NAME "elf32-vax"
2111 #define ELF_MACHINE_CODE EM_VAX
2112 #define ELF_MAXPAGESIZE 0x1000
2113
2114 #define elf_backend_create_dynamic_sections \
2115 _bfd_elf_create_dynamic_sections
2116 #define bfd_elf32_bfd_link_hash_table_create \
2117 elf_vax_link_hash_table_create
2118 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2119
2120 #define elf_backend_check_relocs elf_vax_check_relocs
2121 #define elf_backend_adjust_dynamic_symbol \
2122 elf_vax_adjust_dynamic_symbol
2123 #define elf_backend_size_dynamic_sections \
2124 elf_vax_size_dynamic_sections
2125 #define elf_backend_relocate_section elf_vax_relocate_section
2126 #define elf_backend_finish_dynamic_symbol \
2127 elf_vax_finish_dynamic_symbol
2128 #define elf_backend_finish_dynamic_sections \
2129 elf_vax_finish_dynamic_sections
2130 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2131 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2132 #define bfd_elf32_bfd_merge_private_bfd_data \
2133 elf32_vax_merge_private_bfd_data
2134 #define bfd_elf32_bfd_set_private_flags \
2135 elf32_vax_set_private_flags
2136 #define bfd_elf32_bfd_print_private_bfd_data \
2137 elf32_vax_print_private_bfd_data
2138
2139 #define elf_backend_can_gc_sections 1
2140 #define elf_backend_want_got_plt 1
2141 #define elf_backend_plt_readonly 1
2142 #define elf_backend_want_plt_sym 0
2143 #define elf_backend_got_header_size 16
2144 #define elf_backend_rela_normal 1
2145
2146 #include "elf32-target.h"
GDB Binutils - Deliverables
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