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Mention PR ld/4701.
[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 Free Software Foundation, Inc.
4 Contributed by Matt Thomas <matt@3am-software.com>.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/vax.h"
28
29 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
30 static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
31 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
32 struct bfd_hash_table *,
33 const char *);
34 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
35 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
36 asection *, const Elf_Internal_Rela *);
37 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
38 struct elf_link_hash_entry *);
39 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
40 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
41 bfd *, asection *, bfd_byte *,
42 Elf_Internal_Rela *,
43 Elf_Internal_Sym *, asection **);
44 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
45 struct elf_link_hash_entry *,
46 Elf_Internal_Sym *);
47 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
48 struct bfd_link_info *);
49
50 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
51 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
52 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, PTR);
53
54 static reloc_howto_type howto_table[] = {
55 HOWTO (R_VAX_NONE, /* type */
56 0, /* rightshift */
57 0, /* size (0 = byte, 1 = short, 2 = long) */
58 0, /* bitsize */
59 FALSE, /* pc_relative */
60 0, /* bitpos */
61 complain_overflow_dont, /* complain_on_overflow */
62 bfd_elf_generic_reloc, /* special_function */
63 "R_VAX_NONE", /* name */
64 FALSE, /* partial_inplace */
65 0, /* src_mask */
66 0x00000000, /* dst_mask */
67 FALSE), /* pcrel_offset */
68
69 HOWTO (R_VAX_32, /* type */
70 0, /* rightshift */
71 2, /* size (0 = byte, 1 = short, 2 = long) */
72 32, /* bitsize */
73 FALSE, /* pc_relative */
74 0, /* bitpos */
75 complain_overflow_bitfield, /* complain_on_overflow */
76 bfd_elf_generic_reloc, /* special_function */
77 "R_VAX_32", /* name */
78 FALSE, /* partial_inplace */
79 0, /* src_mask */
80 0xffffffff, /* dst_mask */
81 FALSE), /* pcrel_offset */
82
83 HOWTO (R_VAX_16, /* type */
84 0, /* rightshift */
85 1, /* size (0 = byte, 1 = short, 2 = long) */
86 16, /* bitsize */
87 FALSE, /* pc_relative */
88 0, /* bitpos */
89 complain_overflow_bitfield, /* complain_on_overflow */
90 bfd_elf_generic_reloc, /* special_function */
91 "R_VAX_16", /* name */
92 FALSE, /* partial_inplace */
93 0, /* src_mask */
94 0x0000ffff, /* dst_mask */
95 FALSE), /* pcrel_offset */
96
97 HOWTO (R_VAX_8, /* type */
98 0, /* rightshift */
99 0, /* size (0 = byte, 1 = short, 2 = long) */
100 8, /* bitsize */
101 FALSE, /* pc_relative */
102 0, /* bitpos */
103 complain_overflow_bitfield, /* complain_on_overflow */
104 bfd_elf_generic_reloc, /* special_function */
105 "R_VAX_8", /* name */
106 FALSE, /* partial_inplace */
107 0, /* src_mask */
108 0x000000ff, /* dst_mask */
109 FALSE), /* pcrel_offset */
110
111 HOWTO (R_VAX_PC32, /* type */
112 0, /* rightshift */
113 2, /* size (0 = byte, 1 = short, 2 = long) */
114 32, /* bitsize */
115 TRUE, /* pc_relative */
116 0, /* bitpos */
117 complain_overflow_bitfield, /* complain_on_overflow */
118 bfd_elf_generic_reloc, /* special_function */
119 "R_VAX_PC32", /* name */
120 FALSE, /* partial_inplace */
121 0, /* src_mask */
122 0xffffffff, /* dst_mask */
123 TRUE), /* pcrel_offset */
124
125 HOWTO (R_VAX_PC16, /* type */
126 0, /* rightshift */
127 1, /* size (0 = byte, 1 = short, 2 = long) */
128 16, /* bitsize */
129 TRUE, /* pc_relative */
130 0, /* bitpos */
131 complain_overflow_signed, /* complain_on_overflow */
132 bfd_elf_generic_reloc, /* special_function */
133 "R_VAX_PC16", /* name */
134 FALSE, /* partial_inplace */
135 0, /* src_mask */
136 0x0000ffff, /* dst_mask */
137 TRUE), /* pcrel_offset */
138
139 HOWTO (R_VAX_PC8, /* type */
140 0, /* rightshift */
141 0, /* size (0 = byte, 1 = short, 2 = long) */
142 8, /* bitsize */
143 TRUE, /* pc_relative */
144 0, /* bitpos */
145 complain_overflow_signed, /* complain_on_overflow */
146 bfd_elf_generic_reloc, /* special_function */
147 "R_VAX_PC8", /* name */
148 FALSE, /* partial_inplace */
149 0, /* src_mask */
150 0x000000ff, /* dst_mask */
151 TRUE), /* pcrel_offset */
152
153 HOWTO (R_VAX_GOT32, /* type */
154 0, /* rightshift */
155 2, /* size (0 = byte, 1 = short, 2 = long) */
156 32, /* bitsize */
157 TRUE, /* pc_relative */
158 0, /* bitpos */
159 complain_overflow_bitfield, /* complain_on_overflow */
160 bfd_elf_generic_reloc, /* special_function */
161 "R_VAX_GOT32", /* name */
162 FALSE, /* partial_inplace */
163 0, /* src_mask */
164 0xffffffff, /* dst_mask */
165 TRUE), /* pcrel_offset */
166
167 EMPTY_HOWTO (-1),
168 EMPTY_HOWTO (-1),
169 EMPTY_HOWTO (-1),
170 EMPTY_HOWTO (-1),
171 EMPTY_HOWTO (-1),
172
173 HOWTO (R_VAX_PLT32, /* type */
174 0, /* rightshift */
175 2, /* size (0 = byte, 1 = short, 2 = long) */
176 32, /* bitsize */
177 TRUE, /* pc_relative */
178 0, /* bitpos */
179 complain_overflow_bitfield, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_VAX_PLT32", /* name */
182 FALSE, /* partial_inplace */
183 0, /* src_mask */
184 0xffffffff, /* dst_mask */
185 TRUE), /* pcrel_offset */
186
187 EMPTY_HOWTO (-1),
188 EMPTY_HOWTO (-1),
189 EMPTY_HOWTO (-1),
190 EMPTY_HOWTO (-1),
191 EMPTY_HOWTO (-1),
192
193 HOWTO (R_VAX_COPY, /* type */
194 0, /* rightshift */
195 0, /* size (0 = byte, 1 = short, 2 = long) */
196 0, /* bitsize */
197 FALSE, /* pc_relative */
198 0, /* bitpos */
199 complain_overflow_dont, /* complain_on_overflow */
200 bfd_elf_generic_reloc, /* special_function */
201 "R_VAX_COPY", /* name */
202 FALSE, /* partial_inplace */
203 0, /* src_mask */
204 0xffffffff, /* dst_mask */
205 FALSE), /* pcrel_offset */
206
207 HOWTO (R_VAX_GLOB_DAT, /* type */
208 0, /* rightshift */
209 2, /* size (0 = byte, 1 = short, 2 = long) */
210 32, /* bitsize */
211 FALSE, /* pc_relative */
212 0, /* bitpos */
213 complain_overflow_dont, /* complain_on_overflow */
214 bfd_elf_generic_reloc, /* special_function */
215 "R_VAX_GLOB_DAT", /* name */
216 FALSE, /* partial_inplace */
217 0, /* src_mask */
218 0xffffffff, /* dst_mask */
219 FALSE), /* pcrel_offset */
220
221 HOWTO (R_VAX_JMP_SLOT, /* type */
222 0, /* rightshift */
223 2, /* size (0 = byte, 1 = short, 2 = long) */
224 32, /* bitsize */
225 FALSE, /* pc_relative */
226 0, /* bitpos */
227 complain_overflow_dont, /* complain_on_overflow */
228 bfd_elf_generic_reloc, /* special_function */
229 "R_VAX_JMP_SLOT", /* name */
230 FALSE, /* partial_inplace */
231 0, /* src_mask */
232 0xffffffff, /* dst_mask */
233 FALSE), /* pcrel_offset */
234
235 HOWTO (R_VAX_RELATIVE, /* type */
236 0, /* rightshift */
237 2, /* size (0 = byte, 1 = short, 2 = long) */
238 32, /* bitsize */
239 FALSE, /* pc_relative */
240 0, /* bitpos */
241 complain_overflow_dont, /* complain_on_overflow */
242 bfd_elf_generic_reloc, /* special_function */
243 "R_VAX_RELATIVE", /* name */
244 FALSE, /* partial_inplace */
245 0, /* src_mask */
246 0xffffffff, /* dst_mask */
247 FALSE), /* pcrel_offset */
248
249 /* GNU extension to record C++ vtable hierarchy */
250 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
251 0, /* rightshift */
252 2, /* size (0 = byte, 1 = short, 2 = long) */
253 0, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_dont, /* complain_on_overflow */
257 NULL, /* special_function */
258 "R_VAX_GNU_VTINHERIT", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* GNU extension to record C++ vtable member usage */
265 HOWTO (R_VAX_GNU_VTENTRY, /* type */
266 0, /* rightshift */
267 2, /* size (0 = byte, 1 = short, 2 = long) */
268 0, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_dont, /* complain_on_overflow */
272 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
273 "R_VAX_GNU_VTENTRY", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0, /* dst_mask */
277 FALSE), /* pcrel_offset */
278 };
279
280 static void
281 rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
282 Elf_Internal_Rela *dst)
283 {
284 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
285 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
286 }
287
288 #define elf_info_to_howto rtype_to_howto
289
290 static const struct
291 {
292 bfd_reloc_code_real_type bfd_val;
293 int elf_val;
294 } reloc_map[] = {
295 { BFD_RELOC_NONE, R_VAX_NONE },
296 { BFD_RELOC_32, R_VAX_32 },
297 { BFD_RELOC_16, R_VAX_16 },
298 { BFD_RELOC_8, R_VAX_8 },
299 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
300 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
301 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
302 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
303 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
304 { BFD_RELOC_NONE, R_VAX_COPY },
305 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
306 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
307 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
308 { BFD_RELOC_CTOR, R_VAX_32 },
309 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
310 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
311 };
312
313 static reloc_howto_type *
314 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
315 {
316 unsigned int i;
317 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
318 {
319 if (reloc_map[i].bfd_val == code)
320 return &howto_table[reloc_map[i].elf_val];
321 }
322 return 0;
323 }
324
325 static reloc_howto_type *
326 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
327 const char *r_name)
328 {
329 unsigned int i;
330
331 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
332 if (howto_table[i].name != NULL
333 && strcasecmp (howto_table[i].name, r_name) == 0)
334 return &howto_table[i];
335
336 return NULL;
337 }
338
339 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
340 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
341 #define ELF_ARCH bfd_arch_vax
342 /* end code generated by elf.el */
343 \f
344 /* Functions for the VAX ELF linker. */
345
346 /* The name of the dynamic interpreter. This is put in the .interp
347 section. */
348
349 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
350
351 /* The size in bytes of an entry in the procedure linkage table. */
352
353 #define PLT_ENTRY_SIZE 12
354
355 /* The first entry in a procedure linkage table looks like this. See
356 the SVR4 ABI VAX supplement to see how this works. */
357
358 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
359 {
360 0xdd, 0xef, /* pushl l^ */
361 0, 0, 0, 0, /* offset to .plt.got + 4 */
362 0x17, 0xff, /* jmp @L^(pc) */
363 0, 0, 0, 0, /* offset to .plt.got + 8 */
364 };
365
366 /* Subsequent entries in a procedure linkage table look like this. */
367
368 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
369 {
370 0x40, 0x00, /* .word ^M<r6> */
371 0x16, 0xef, /* jsb L^(pc) */
372 0, 0, 0, 0, /* replaced with offset to start of .plt */
373 0, 0, 0, 0, /* index into .rela.plt */
374 };
375
376 /* The VAX linker needs to keep track of the number of relocs that it
377 decides to copy in check_relocs for each symbol. This is so that it
378 can discard PC relative relocs if it doesn't need them when linking
379 with -Bsymbolic. We store the information in a field extending the
380 regular ELF linker hash table. */
381
382 /* This structure keeps track of the number of PC relative relocs we have
383 copied for a given symbol. */
384
385 struct elf_vax_pcrel_relocs_copied
386 {
387 /* Next section. */
388 struct elf_vax_pcrel_relocs_copied *next;
389 /* A section in dynobj. */
390 asection *section;
391 /* Number of relocs copied in this section. */
392 bfd_size_type count;
393 };
394
395 /* VAX ELF linker hash entry. */
396
397 struct elf_vax_link_hash_entry
398 {
399 struct elf_link_hash_entry root;
400
401 /* Number of PC relative relocs copied for this symbol. */
402 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
403
404 bfd_vma got_addend;
405 };
406
407 /* VAX ELF linker hash table. */
408
409 struct elf_vax_link_hash_table
410 {
411 struct elf_link_hash_table root;
412 };
413
414 /* Declare this now that the above structures are defined. */
415
416 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
417 PTR);
418
419 /* Declare this now that the above structures are defined. */
420
421 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
422 PTR);
423
424 /* Traverse an VAX ELF linker hash table. */
425
426 #define elf_vax_link_hash_traverse(table, func, info) \
427 (elf_link_hash_traverse \
428 (&(table)->root, \
429 (bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \
430 (info)))
431
432 /* Get the VAX ELF linker hash table from a link_info structure. */
433
434 #define elf_vax_hash_table(p) ((struct elf_vax_link_hash_table *) (p)->hash)
435
436 /* Create an entry in an VAX ELF linker hash table. */
437
438 static struct bfd_hash_entry *
439 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
440 struct bfd_hash_table *table,
441 const char *string)
442 {
443 struct elf_vax_link_hash_entry *ret =
444 (struct elf_vax_link_hash_entry *) entry;
445
446 /* Allocate the structure if it has not already been allocated by a
447 subclass. */
448 if (ret == NULL)
449 ret = ((struct elf_vax_link_hash_entry *)
450 bfd_hash_allocate (table,
451 sizeof (struct elf_vax_link_hash_entry)));
452 if (ret == NULL)
453 return (struct bfd_hash_entry *) ret;
454
455 /* Call the allocation method of the superclass. */
456 ret = ((struct elf_vax_link_hash_entry *)
457 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
458 table, string));
459 if (ret != NULL)
460 {
461 ret->pcrel_relocs_copied = NULL;
462 }
463
464 return (struct bfd_hash_entry *) ret;
465 }
466
467 /* Create an VAX ELF linker hash table. */
468
469 static struct bfd_link_hash_table *
470 elf_vax_link_hash_table_create (bfd *abfd)
471 {
472 struct elf_vax_link_hash_table *ret;
473 bfd_size_type amt = sizeof (struct elf_vax_link_hash_table);
474
475 ret = bfd_malloc (amt);
476 if (ret == NULL)
477 return NULL;
478
479 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
480 elf_vax_link_hash_newfunc,
481 sizeof (struct elf_vax_link_hash_entry)))
482 {
483 free (ret);
484 return NULL;
485 }
486
487 return &ret->root.root;
488 }
489
490 /* Keep vax-specific flags in the ELF header */
491 static bfd_boolean
492 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
493 {
494 elf_elfheader (abfd)->e_flags = flags;
495 elf_flags_init (abfd) = TRUE;
496 return TRUE;
497 }
498
499 /* Merge backend specific data from an object file to the output
500 object file when linking. */
501 static bfd_boolean
502 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
503 {
504 flagword out_flags;
505 flagword in_flags;
506
507 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
508 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
509 return TRUE;
510
511 in_flags = elf_elfheader (ibfd)->e_flags;
512 out_flags = elf_elfheader (obfd)->e_flags;
513
514 if (!elf_flags_init (obfd))
515 {
516 elf_flags_init (obfd) = TRUE;
517 elf_elfheader (obfd)->e_flags = in_flags;
518 }
519
520 return TRUE;
521 }
522
523 /* Display the flags field */
524 static bfd_boolean
525 elf32_vax_print_private_bfd_data (bfd *abfd, PTR ptr)
526 {
527 FILE *file = (FILE *) ptr;
528
529 BFD_ASSERT (abfd != NULL && ptr != NULL);
530
531 /* Print normal ELF private data. */
532 _bfd_elf_print_private_bfd_data (abfd, ptr);
533
534 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
535
536 /* xgettext:c-format */
537 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
538
539 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
540 fprintf (file, _(" [nonpic]"));
541
542 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
543 fprintf (file, _(" [d-float]"));
544
545 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
546 fprintf (file, _(" [g-float]"));
547
548 fputc ('\n', file);
549
550 return TRUE;
551 }
552 /* Look through the relocs for a section during the first phase, and
553 allocate space in the global offset table or procedure linkage
554 table. */
555
556 static bfd_boolean
557 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
558 const Elf_Internal_Rela *relocs)
559 {
560 bfd *dynobj;
561 Elf_Internal_Shdr *symtab_hdr;
562 struct elf_link_hash_entry **sym_hashes;
563 const Elf_Internal_Rela *rel;
564 const Elf_Internal_Rela *rel_end;
565 asection *sgot;
566 asection *srelgot;
567 asection *sreloc;
568
569 if (info->relocatable)
570 return TRUE;
571
572 dynobj = elf_hash_table (info)->dynobj;
573 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
574 sym_hashes = elf_sym_hashes (abfd);
575
576 sgot = NULL;
577 srelgot = NULL;
578 sreloc = NULL;
579
580 rel_end = relocs + sec->reloc_count;
581 for (rel = relocs; rel < rel_end; rel++)
582 {
583 unsigned long r_symndx;
584 struct elf_link_hash_entry *h;
585
586 r_symndx = ELF32_R_SYM (rel->r_info);
587
588 if (r_symndx < symtab_hdr->sh_info)
589 h = NULL;
590 else
591 {
592 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
593 while (h->root.type == bfd_link_hash_indirect
594 || h->root.type == bfd_link_hash_warning)
595 h = (struct elf_link_hash_entry *) h->root.u.i.link;
596 }
597
598 switch (ELF32_R_TYPE (rel->r_info))
599 {
600 case R_VAX_GOT32:
601 if (h != NULL
602 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
603 break;
604
605 /* This symbol requires a global offset table entry. */
606
607 if (dynobj == NULL)
608 {
609 /* Create the .got section. */
610 elf_hash_table (info)->dynobj = dynobj = abfd;
611 if (!_bfd_elf_create_got_section (dynobj, info))
612 return FALSE;
613 }
614
615 if (sgot == NULL)
616 {
617 sgot = bfd_get_section_by_name (dynobj, ".got");
618 BFD_ASSERT (sgot != NULL);
619 }
620
621 if (srelgot == NULL
622 && (h != NULL || info->shared))
623 {
624 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
625 if (srelgot == NULL)
626 {
627 srelgot = bfd_make_section_with_flags (dynobj,
628 ".rela.got",
629 (SEC_ALLOC
630 | SEC_LOAD
631 | SEC_HAS_CONTENTS
632 | SEC_IN_MEMORY
633 | SEC_LINKER_CREATED
634 | SEC_READONLY));
635 if (srelgot == NULL
636 || !bfd_set_section_alignment (dynobj, srelgot, 2))
637 return FALSE;
638 }
639 }
640
641 if (h != NULL)
642 {
643 struct elf_vax_link_hash_entry *eh;
644
645 eh = (struct elf_vax_link_hash_entry *) h;
646 if (h->got.refcount == -1)
647 {
648 h->got.refcount = 1;
649 eh->got_addend = rel->r_addend;
650 }
651 else
652 {
653 h->got.refcount++;
654 if (eh->got_addend != (bfd_vma) rel->r_addend)
655 (*_bfd_error_handler)
656 (_("%s: warning: GOT addend of %ld to `%s' does not match previous GOT addend of %ld"),
657 bfd_get_filename (abfd), rel->r_addend,
658 h->root.root.string,
659 eh->got_addend);
660
661 }
662 }
663 break;
664
665 case R_VAX_PLT32:
666 /* This symbol requires a procedure linkage table entry. We
667 actually build the entry in adjust_dynamic_symbol,
668 because this might be a case of linking PIC code which is
669 never referenced by a dynamic object, in which case we
670 don't need to generate a procedure linkage table entry
671 after all. */
672
673 /* If this is a local symbol, we resolve it directly without
674 creating a procedure linkage table entry. */
675 if (h == NULL)
676 continue;
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 {
706 /* Make sure a plt entry is created for this symbol if
707 it turns out to be a function defined by a dynamic
708 object. */
709 if (h->plt.refcount == -1)
710 h->plt.refcount = 1;
711 else
712 h->plt.refcount++;
713 }
714 break;
715 }
716 /* Fall through. */
717 case R_VAX_8:
718 case R_VAX_16:
719 case R_VAX_32:
720 if (h != NULL)
721 {
722 /* Make sure a plt entry is created for this symbol if it
723 turns out to be a function defined by a dynamic object. */
724 if (h->plt.refcount == -1)
725 h->plt.refcount = 1;
726 else
727 h->plt.refcount++;
728 }
729
730 /* If we are creating a shared library, we need to copy the
731 reloc into the shared library. */
732 if (info->shared
733 && (sec->flags & SEC_ALLOC) != 0)
734 {
735 /* When creating a shared object, we must copy these
736 reloc types into the output file. We create a reloc
737 section in dynobj and make room for this reloc. */
738 if (sreloc == NULL)
739 {
740 const char *name;
741
742 name = (bfd_elf_string_from_elf_section
743 (abfd,
744 elf_elfheader (abfd)->e_shstrndx,
745 elf_section_data (sec)->rel_hdr.sh_name));
746 if (name == NULL)
747 return FALSE;
748
749 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
750 && strcmp (bfd_get_section_name (abfd, sec),
751 name + 5) == 0);
752
753 sreloc = bfd_get_section_by_name (dynobj, name);
754 if (sreloc == NULL)
755 {
756 sreloc = bfd_make_section_with_flags (dynobj,
757 name,
758 (SEC_ALLOC
759 | SEC_LOAD
760 | SEC_HAS_CONTENTS
761 | SEC_IN_MEMORY
762 | SEC_LINKER_CREATED
763 | SEC_READONLY));
764 if (sreloc == NULL
765 || !bfd_set_section_alignment (dynobj, sreloc, 2))
766 return FALSE;
767 }
768 if (sec->flags & SEC_READONLY)
769 info->flags |= DF_TEXTREL;
770 }
771
772 sreloc->size += sizeof (Elf32_External_Rela);
773
774 /* If we are linking with -Bsymbolic, we count the number of
775 PC relative relocations we have entered for this symbol,
776 so that we can discard them again if the symbol is later
777 defined by a regular object. Note that this function is
778 only called if we are using a vaxelf linker hash table,
779 which means that h is really a pointer to an
780 elf_vax_link_hash_entry. */
781 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
782 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
783 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
784 && info->symbolic)
785 {
786 struct elf_vax_link_hash_entry *eh;
787 struct elf_vax_pcrel_relocs_copied *p;
788
789 eh = (struct elf_vax_link_hash_entry *) h;
790
791 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
792 if (p->section == sreloc)
793 break;
794
795 if (p == NULL)
796 {
797 p = ((struct elf_vax_pcrel_relocs_copied *)
798 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
799 if (p == NULL)
800 return FALSE;
801 p->next = eh->pcrel_relocs_copied;
802 eh->pcrel_relocs_copied = p;
803 p->section = sreloc;
804 p->count = 0;
805 }
806
807 ++p->count;
808 }
809 }
810
811 break;
812
813 /* This relocation describes the C++ object vtable hierarchy.
814 Reconstruct it for later use during GC. */
815 case R_VAX_GNU_VTINHERIT:
816 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
817 return FALSE;
818 break;
819
820 /* This relocation describes which C++ vtable entries are actually
821 used. Record for later use during GC. */
822 case R_VAX_GNU_VTENTRY:
823 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
824 return FALSE;
825 break;
826
827 default:
828 break;
829 }
830 }
831
832 return TRUE;
833 }
834
835 /* Return the section that should be marked against GC for a given
836 relocation. */
837
838 static asection *
839 elf_vax_gc_mark_hook (asection *sec,
840 struct bfd_link_info *info,
841 Elf_Internal_Rela *rel,
842 struct elf_link_hash_entry *h,
843 Elf_Internal_Sym *sym)
844 {
845 if (h != NULL)
846 switch (ELF32_R_TYPE (rel->r_info))
847 {
848 case R_VAX_GNU_VTINHERIT:
849 case R_VAX_GNU_VTENTRY:
850 return NULL;
851 }
852
853 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
854 }
855
856 /* Update the got entry reference counts for the section being removed. */
857
858 static bfd_boolean
859 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
860 const Elf_Internal_Rela *relocs)
861 {
862 Elf_Internal_Shdr *symtab_hdr;
863 struct elf_link_hash_entry **sym_hashes;
864 const Elf_Internal_Rela *rel, *relend;
865 bfd *dynobj;
866
867 dynobj = elf_hash_table (info)->dynobj;
868 if (dynobj == NULL)
869 return TRUE;
870
871 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
872 sym_hashes = elf_sym_hashes (abfd);
873
874 relend = relocs + sec->reloc_count;
875 for (rel = relocs; rel < relend; rel++)
876 {
877 unsigned long r_symndx;
878 struct elf_link_hash_entry *h = NULL;
879
880 r_symndx = ELF32_R_SYM (rel->r_info);
881 if (r_symndx >= symtab_hdr->sh_info)
882 {
883 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
884 while (h->root.type == bfd_link_hash_indirect
885 || h->root.type == bfd_link_hash_warning)
886 h = (struct elf_link_hash_entry *) h->root.u.i.link;
887 }
888
889 switch (ELF32_R_TYPE (rel->r_info))
890 {
891 case R_VAX_GOT32:
892 if (h != NULL && h->got.refcount > 0)
893 --h->got.refcount;
894 break;
895
896 case R_VAX_PLT32:
897 case R_VAX_PC8:
898 case R_VAX_PC16:
899 case R_VAX_PC32:
900 case R_VAX_8:
901 case R_VAX_16:
902 case R_VAX_32:
903 if (h != NULL && h->plt.refcount > 0)
904 --h->plt.refcount;
905 break;
906
907 default:
908 break;
909 }
910 }
911
912 return TRUE;
913 }
914
915 /* Adjust a symbol defined by a dynamic object and referenced by a
916 regular object. The current definition is in some section of the
917 dynamic object, but we're not including those sections. We have to
918 change the definition to something the rest of the link can
919 understand. */
920
921 static bfd_boolean
922 elf_vax_adjust_dynamic_symbol (info, h)
923 struct bfd_link_info *info;
924 struct elf_link_hash_entry *h;
925 {
926 bfd *dynobj;
927 asection *s;
928
929 dynobj = elf_hash_table (info)->dynobj;
930
931 /* Make sure we know what is going on here. */
932 BFD_ASSERT (dynobj != NULL
933 && (h->needs_plt
934 || h->u.weakdef != NULL
935 || (h->def_dynamic
936 && h->ref_regular
937 && !h->def_regular)));
938
939 /* If this is a function, put it in the procedure linkage table. We
940 will fill in the contents of the procedure linkage table later,
941 when we know the address of the .got section. */
942 if (h->type == STT_FUNC
943 || h->needs_plt)
944 {
945 if (! info->shared
946 && !h->def_dynamic
947 && !h->ref_dynamic
948 /* We must always create the plt entry if it was referenced
949 by a PLTxxO relocation. In this case we already recorded
950 it as a dynamic symbol. */
951 && h->dynindx == -1)
952 {
953 /* This case can occur if we saw a PLTxx reloc in an input
954 file, but the symbol was never referred to by a dynamic
955 object. In such a case, we don't actually need to build
956 a procedure linkage table, and we can just do a PCxx
957 reloc instead. */
958 BFD_ASSERT (h->needs_plt);
959 h->plt.offset = (bfd_vma) -1;
960 return TRUE;
961 }
962
963 /* GC may have rendered this entry unused. */
964 if (h->plt.refcount <= 0)
965 {
966 h->needs_plt = 0;
967 h->plt.offset = (bfd_vma) -1;
968 return TRUE;
969 }
970
971 /* Make sure this symbol is output as a dynamic symbol. */
972 if (h->dynindx == -1)
973 {
974 if (! bfd_elf_link_record_dynamic_symbol (info, h))
975 return FALSE;
976 }
977
978 s = bfd_get_section_by_name (dynobj, ".plt");
979 BFD_ASSERT (s != NULL);
980
981 /* If this is the first .plt entry, make room for the special
982 first entry. */
983 if (s->size == 0)
984 {
985 s->size += PLT_ENTRY_SIZE;
986 }
987
988 /* If this symbol is not defined in a regular file, and we are
989 not generating a shared library, then set the symbol to this
990 location in the .plt. This is required to make function
991 pointers compare as equal between the normal executable and
992 the shared library. */
993 if (!info->shared
994 && !h->def_regular)
995 {
996 h->root.u.def.section = s;
997 h->root.u.def.value = s->size;
998 }
999
1000 h->plt.offset = s->size;
1001
1002 /* Make room for this entry. */
1003 s->size += PLT_ENTRY_SIZE;
1004
1005 /* We also need to make an entry in the .got.plt section, which
1006 will be placed in the .got section by the linker script. */
1007
1008 s = bfd_get_section_by_name (dynobj, ".got.plt");
1009 BFD_ASSERT (s != NULL);
1010 s->size += 4;
1011
1012 /* We also need to make an entry in the .rela.plt section. */
1013
1014 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1015 BFD_ASSERT (s != NULL);
1016 s->size += sizeof (Elf32_External_Rela);
1017
1018 return TRUE;
1019 }
1020
1021 /* Reinitialize the plt offset now that it is not used as a reference
1022 count any more. */
1023 h->plt.offset = (bfd_vma) -1;
1024
1025 /* If this is a weak symbol, and there is a real definition, the
1026 processor independent code will have arranged for us to see the
1027 real definition first, and we can just use the same value. */
1028 if (h->u.weakdef != NULL)
1029 {
1030 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1031 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1032 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1033 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1034 return TRUE;
1035 }
1036
1037 /* This is a reference to a symbol defined by a dynamic object which
1038 is not a function. */
1039
1040 /* If we are creating a shared library, we must presume that the
1041 only references to the symbol are via the global offset table.
1042 For such cases we need not do anything here; the relocations will
1043 be handled correctly by relocate_section. */
1044 if (info->shared)
1045 return TRUE;
1046
1047 if (h->size == 0)
1048 {
1049 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1050 h->root.root.string);
1051 return TRUE;
1052 }
1053
1054 /* We must allocate the symbol in our .dynbss section, which will
1055 become part of the .bss section of the executable. There will be
1056 an entry for this symbol in the .dynsym section. The dynamic
1057 object will contain position independent code, so all references
1058 from the dynamic object to this symbol will go through the global
1059 offset table. The dynamic linker will use the .dynsym entry to
1060 determine the address it must put in the global offset table, so
1061 both the dynamic object and the regular object will refer to the
1062 same memory location for the variable. */
1063
1064 s = bfd_get_section_by_name (dynobj, ".dynbss");
1065 BFD_ASSERT (s != NULL);
1066
1067 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1068 copy the initial value out of the dynamic object and into the
1069 runtime process image. We need to remember the offset into the
1070 .rela.bss section we are going to use. */
1071 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1072 {
1073 asection *srel;
1074
1075 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1076 BFD_ASSERT (srel != NULL);
1077 srel->size += sizeof (Elf32_External_Rela);
1078 h->needs_copy = 1;
1079 }
1080
1081 return _bfd_elf_adjust_dynamic_copy (h, s);
1082 }
1083
1084 /* Set the sizes of the dynamic sections. */
1085
1086 static bfd_boolean
1087 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1088 {
1089 bfd *dynobj;
1090 asection *s;
1091 bfd_boolean plt;
1092 bfd_boolean relocs;
1093 bfd_boolean reltext;
1094
1095 dynobj = elf_hash_table (info)->dynobj;
1096 BFD_ASSERT (dynobj != NULL);
1097
1098 if (elf_hash_table (info)->dynamic_sections_created)
1099 {
1100 /* Set the contents of the .interp section to the interpreter. */
1101 if (info->executable)
1102 {
1103 s = bfd_get_section_by_name (dynobj, ".interp");
1104 BFD_ASSERT (s != NULL);
1105 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1106 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1107 }
1108 }
1109 else
1110 {
1111 /* We may have created entries in the .rela.got and .got sections.
1112 However, if we are not creating the dynamic sections, we will
1113 not actually use these entries. Reset the size of .rela.got
1114 and .got, which will cause it to get stripped from the output
1115 file below. */
1116 s = bfd_get_section_by_name (dynobj, ".rela.got");
1117 if (s != NULL)
1118 s->size = 0;
1119 s = bfd_get_section_by_name (dynobj, ".got.plt");
1120 if (s != NULL)
1121 s->size = 0;
1122 s = bfd_get_section_by_name (dynobj, ".got");
1123 if (s != NULL)
1124 s->size = 0;
1125 }
1126
1127 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1128 relative relocs against symbols defined in a regular object. We
1129 allocated space for them in the check_relocs routine, but we will not
1130 fill them in in the relocate_section routine. */
1131 if (info->shared && info->symbolic)
1132 elf_vax_link_hash_traverse (elf_vax_hash_table (info),
1133 elf_vax_discard_copies,
1134 NULL);
1135
1136 /* If this is a -Bsymbolic shared link or a static link, we need to
1137 discard all the got entries we've recorded. Otherwise, we need to
1138 instantiate (allocate space for them). */
1139 elf_link_hash_traverse (elf_hash_table (info),
1140 elf_vax_instantiate_got_entries,
1141 (PTR) info);
1142
1143 /* The check_relocs and adjust_dynamic_symbol entry points have
1144 determined the sizes of the various dynamic sections. Allocate
1145 memory for them. */
1146 plt = FALSE;
1147 relocs = FALSE;
1148 reltext = FALSE;
1149 for (s = dynobj->sections; s != NULL; s = s->next)
1150 {
1151 const char *name;
1152
1153 if ((s->flags & SEC_LINKER_CREATED) == 0)
1154 continue;
1155
1156 /* It's OK to base decisions on the section name, because none
1157 of the dynobj section names depend upon the input files. */
1158 name = bfd_get_section_name (dynobj, s);
1159
1160 if (strcmp (name, ".plt") == 0)
1161 {
1162 /* Remember whether there is a PLT. */
1163 plt = s->size != 0;
1164 }
1165 else if (CONST_STRNEQ (name, ".rela"))
1166 {
1167 if (s->size != 0)
1168 {
1169 asection *target;
1170
1171 /* Remember whether there are any reloc sections other
1172 than .rela.plt. */
1173 if (strcmp (name, ".rela.plt") != 0)
1174 {
1175 const char *outname;
1176
1177 relocs = TRUE;
1178
1179 /* If this relocation section applies to a read only
1180 section, then we probably need a DT_TEXTREL
1181 entry. .rela.plt is actually associated with
1182 .got.plt, which is never readonly. */
1183 outname = bfd_get_section_name (output_bfd,
1184 s->output_section);
1185 target = bfd_get_section_by_name (output_bfd, outname + 5);
1186 if (target != NULL
1187 && (target->flags & SEC_READONLY) != 0
1188 && (target->flags & SEC_ALLOC) != 0)
1189 reltext = TRUE;
1190 }
1191
1192 /* We use the reloc_count field as a counter if we need
1193 to copy relocs into the output file. */
1194 s->reloc_count = 0;
1195 }
1196 }
1197 else if (! CONST_STRNEQ (name, ".got")
1198 && strcmp (name, ".dynbss") != 0)
1199 {
1200 /* It's not one of our sections, so don't allocate space. */
1201 continue;
1202 }
1203
1204 if (s->size == 0)
1205 {
1206 /* If we don't need this section, strip it from the
1207 output file. This is mostly to handle .rela.bss and
1208 .rela.plt. We must create both sections in
1209 create_dynamic_sections, because they must be created
1210 before the linker maps input sections to output
1211 sections. The linker does that before
1212 adjust_dynamic_symbol is called, and it is that
1213 function which decides whether anything needs to go
1214 into these sections. */
1215 s->flags |= SEC_EXCLUDE;
1216 continue;
1217 }
1218
1219 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1220 continue;
1221
1222 /* Allocate memory for the section contents. */
1223 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1224 if (s->contents == NULL)
1225 return FALSE;
1226 }
1227
1228 if (elf_hash_table (info)->dynamic_sections_created)
1229 {
1230 /* Add some entries to the .dynamic section. We fill in the
1231 values later, in elf_vax_finish_dynamic_sections, but we
1232 must add the entries now so that we get the correct size for
1233 the .dynamic section. The DT_DEBUG entry is filled in by the
1234 dynamic linker and used by the debugger. */
1235 #define add_dynamic_entry(TAG, VAL) \
1236 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1237
1238 if (!info->shared)
1239 {
1240 if (!add_dynamic_entry (DT_DEBUG, 0))
1241 return FALSE;
1242 }
1243
1244 if (plt)
1245 {
1246 if (!add_dynamic_entry (DT_PLTGOT, 0)
1247 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1248 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1249 || !add_dynamic_entry (DT_JMPREL, 0))
1250 return FALSE;
1251 }
1252
1253 if (relocs)
1254 {
1255 if (!add_dynamic_entry (DT_RELA, 0)
1256 || !add_dynamic_entry (DT_RELASZ, 0)
1257 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1258 return FALSE;
1259 }
1260
1261 if (reltext || (info->flags & DF_TEXTREL) != 0)
1262 {
1263 if (!add_dynamic_entry (DT_TEXTREL, 0))
1264 return FALSE;
1265 }
1266 }
1267 #undef add_dynamic_entry
1268
1269 return TRUE;
1270 }
1271
1272 /* This function is called via elf_vax_link_hash_traverse if we are
1273 creating a shared object with -Bsymbolic. It discards the space
1274 allocated to copy PC relative relocs against symbols which are defined
1275 in regular objects. We allocated space for them in the check_relocs
1276 routine, but we won't fill them in in the relocate_section routine. */
1277
1278 static bfd_boolean
1279 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1280 PTR ignore ATTRIBUTE_UNUSED)
1281 {
1282 struct elf_vax_pcrel_relocs_copied *s;
1283
1284 if (h->root.root.type == bfd_link_hash_warning)
1285 h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
1286
1287 /* We only discard relocs for symbols defined in a regular object. */
1288 if (!h->root.def_regular)
1289 return TRUE;
1290
1291 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1292 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1293
1294 return TRUE;
1295 }
1296
1297 /* This function is called via elf_link_hash_traverse. It looks for entries
1298 that have GOT or PLT (.GOT) references. If creating a static object or a
1299 shared object with -Bsymbolic, it resets the reference count back to 0
1300 and sets the offset to -1 so normal PC32 relocation will be done. If
1301 creating a shared object or executable, space in the .got and .rela.got
1302 will be reserved for the symbol. */
1303
1304 static bfd_boolean
1305 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, PTR infoptr)
1306 {
1307 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1308 bfd *dynobj;
1309 asection *sgot;
1310 asection *srelgot;
1311
1312 /* We don't care about non-GOT (and non-PLT) entries. */
1313 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1314 return TRUE;
1315
1316 dynobj = elf_hash_table (info)->dynobj;
1317 if (dynobj == NULL)
1318 return TRUE;
1319
1320 sgot = bfd_get_section_by_name (dynobj, ".got");
1321 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1322
1323 if (!elf_hash_table (info)->dynamic_sections_created
1324 || (info->shared && info->symbolic))
1325 {
1326 h->got.refcount = 0;
1327 h->got.offset = (bfd_vma) -1;
1328 h->plt.refcount = 0;
1329 h->plt.offset = (bfd_vma) -1;
1330 }
1331 else if (h->got.refcount > 0)
1332 {
1333 /* Make sure this symbol is output as a dynamic symbol. */
1334 if (h->dynindx == -1)
1335 {
1336 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1337 return FALSE;
1338 }
1339
1340 /* Allocate space in the .got and .rela.got sections. */
1341 sgot->size += 4;
1342 srelgot->size += sizeof (Elf32_External_Rela);
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 *local_got_offsets;
1364 bfd_vma plt_index;
1365 bfd_vma got_offset;
1366 asection *sgot;
1367 asection *splt;
1368 asection *sgotplt;
1369 asection *sreloc;
1370 Elf_Internal_Rela *rel;
1371 Elf_Internal_Rela *relend;
1372
1373 dynobj = elf_hash_table (info)->dynobj;
1374 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1375 sym_hashes = elf_sym_hashes (input_bfd);
1376 local_got_offsets = elf_local_got_offsets (input_bfd);
1377
1378 sgot = NULL;
1379 splt = NULL;
1380 sgotplt = NULL;
1381 sreloc = NULL;
1382
1383 rel = relocs;
1384 relend = relocs + input_section->reloc_count;
1385 for (; rel < relend; rel++)
1386 {
1387 int r_type;
1388 reloc_howto_type *howto;
1389 unsigned long r_symndx;
1390 struct elf_link_hash_entry *h;
1391 Elf_Internal_Sym *sym;
1392 asection *sec;
1393 bfd_vma relocation;
1394 bfd_reloc_status_type r;
1395
1396 r_type = ELF32_R_TYPE (rel->r_info);
1397 if (r_type < 0 || r_type >= (int) R_VAX_max)
1398 {
1399 bfd_set_error (bfd_error_bad_value);
1400 return FALSE;
1401 }
1402 howto = howto_table + r_type;
1403
1404 r_symndx = ELF32_R_SYM (rel->r_info);
1405 h = NULL;
1406 sym = NULL;
1407 sec = NULL;
1408 if (r_symndx < symtab_hdr->sh_info)
1409 {
1410 sym = local_syms + r_symndx;
1411 sec = local_sections[r_symndx];
1412 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1413 }
1414 else
1415 {
1416 bfd_boolean unresolved_reloc;
1417 bfd_boolean warned;
1418
1419 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1420 r_symndx, symtab_hdr, sym_hashes,
1421 h, sec, relocation,
1422 unresolved_reloc, warned);
1423
1424 if ((h->root.type == bfd_link_hash_defined
1425 || h->root.type == bfd_link_hash_defweak)
1426 && ((r_type == R_VAX_PLT32
1427 && h->plt.offset != (bfd_vma) -1
1428 && elf_hash_table (info)->dynamic_sections_created)
1429 || (r_type == R_VAX_GOT32
1430 && strcmp (h->root.root.string,
1431 "_GLOBAL_OFFSET_TABLE_") != 0
1432 && elf_hash_table (info)->dynamic_sections_created
1433 && (! info->shared
1434 || (! info->symbolic && h->dynindx != -1)
1435 || !h->def_regular))
1436 || (info->shared
1437 && ((! info->symbolic && h->dynindx != -1)
1438 || !h->def_regular)
1439 && ((input_section->flags & SEC_ALLOC) != 0
1440 /* DWARF will emit R_VAX_32 relocations in its
1441 sections against symbols defined externally
1442 in shared libraries. We can't do anything
1443 with them here. */
1444
1445 || ((input_section->flags & SEC_DEBUGGING) != 0
1446 && h->def_dynamic))
1447 && (r_type == R_VAX_8
1448 || r_type == R_VAX_16
1449 || r_type == R_VAX_32
1450 || r_type == R_VAX_PC8
1451 || r_type == R_VAX_PC16
1452 || r_type == R_VAX_PC32))))
1453 /* In these cases, we don't need the relocation
1454 value. We check specially because in some
1455 obscure cases sec->output_section will be NULL. */
1456 relocation = 0;
1457 }
1458
1459 if (sec != NULL && elf_discarded_section (sec))
1460 {
1461 /* For relocs against symbols from removed linkonce sections,
1462 or sections discarded by a linker script, we just want the
1463 section contents zeroed. Avoid any special processing. */
1464 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1465 rel->r_info = 0;
1466 rel->r_addend = 0;
1467 continue;
1468 }
1469
1470 if (info->relocatable)
1471 continue;
1472
1473 switch (r_type)
1474 {
1475 case R_VAX_GOT32:
1476 /* Relocation is to the address of the entry for this symbol
1477 in the global offset table. */
1478 if (h == NULL || h->got.offset == (bfd_vma) -1)
1479 break;
1480
1481 /* Relocation is the offset of the entry for this symbol in
1482 the global offset table. */
1483
1484 {
1485 bfd_vma off;
1486
1487 if (sgot == NULL)
1488 {
1489 sgot = bfd_get_section_by_name (dynobj, ".got");
1490 BFD_ASSERT (sgot != NULL);
1491 }
1492
1493 BFD_ASSERT (h != NULL);
1494 off = h->got.offset;
1495 BFD_ASSERT (off != (bfd_vma) -1);
1496 BFD_ASSERT (off < sgot->size);
1497
1498 if (info->shared
1499 && h->dynindx == -1
1500 && h->def_regular)
1501 {
1502 /* The symbol was forced to be local
1503 because of a version file.. We must initialize
1504 this entry in the global offset table. Since
1505 the offset must always be a multiple of 4, we
1506 use the least significant bit to record whether
1507 we have initialized it already.
1508
1509 When doing a dynamic link, we create a .rela.got
1510 relocation entry to initialize the value. This
1511 is done in the finish_dynamic_symbol routine. */
1512 if ((off & 1) != 0)
1513 off &= ~1;
1514 else
1515 {
1516 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1517 sgot->contents + off);
1518 h->got.offset |= 1;
1519 }
1520 } else {
1521 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1522 }
1523
1524 relocation = sgot->output_offset + off;
1525 /* The GOT relocation uses the addend. */
1526 rel->r_addend = 0;
1527
1528 /* Change the reference to be indirect. */
1529 contents[rel->r_offset - 1] |= 0x10;
1530 relocation += sgot->output_section->vma;
1531 }
1532 break;
1533
1534 case R_VAX_PLT32:
1535 /* Relocation is to the entry for this symbol in the
1536 procedure linkage table. */
1537
1538 /* Resolve a PLTxx reloc against a local symbol directly,
1539 without using the procedure linkage table. */
1540 if (h == NULL)
1541 break;
1542
1543 if (h->plt.offset == (bfd_vma) -1
1544 || !elf_hash_table (info)->dynamic_sections_created)
1545 {
1546 /* We didn't make a PLT entry for this symbol. This
1547 happens when statically linking PIC code, or when
1548 using -Bsymbolic. */
1549 break;
1550 }
1551
1552 if (splt == NULL)
1553 {
1554 splt = bfd_get_section_by_name (dynobj, ".plt");
1555 BFD_ASSERT (splt != NULL);
1556 }
1557
1558 if (sgotplt == NULL)
1559 {
1560 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1561 BFD_ASSERT (splt != NULL);
1562 }
1563
1564 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1565
1566 /* Get the offset into the .got table of the entry that
1567 corresponds to this function. Each .got entry is 4 bytes.
1568 The first two are reserved. */
1569 got_offset = (plt_index + 3) * 4;
1570
1571 /* We want the relocate to point into the .got.plt instead
1572 of the plt itself. */
1573 relocation = (sgotplt->output_section->vma
1574 + sgotplt->output_offset
1575 + got_offset);
1576 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1577 if (rel->r_addend == 2)
1578 {
1579 h->plt.offset |= 1;
1580 }
1581 else if (rel->r_addend != 0)
1582 (*_bfd_error_handler)
1583 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1584 bfd_get_filename (input_bfd), rel->r_addend,
1585 h->root.root.string,
1586 bfd_get_section_name (input_bfd, input_section));
1587 rel->r_addend = 0;
1588
1589 break;
1590
1591 case R_VAX_PC8:
1592 case R_VAX_PC16:
1593 case R_VAX_PC32:
1594 if (h == NULL)
1595 break;
1596 /* Fall through. */
1597 case R_VAX_8:
1598 case R_VAX_16:
1599 case R_VAX_32:
1600 if (info->shared
1601 && r_symndx != 0
1602 && (input_section->flags & SEC_ALLOC) != 0
1603 && ((r_type != R_VAX_PC8
1604 && r_type != R_VAX_PC16
1605 && r_type != R_VAX_PC32)
1606 || ((input_section->flags & SEC_CODE)
1607 && (!info->symbolic
1608 || (!h->def_regular && h->type != STT_SECTION)))))
1609 {
1610 Elf_Internal_Rela outrel;
1611 bfd_byte *loc;
1612 bfd_boolean skip, relocate;
1613
1614 /* When generating a shared object, these relocations
1615 are copied into the output file to be resolved at run
1616 time. */
1617 if (sreloc == NULL)
1618 {
1619 const char *name;
1620
1621 name = (bfd_elf_string_from_elf_section
1622 (input_bfd,
1623 elf_elfheader (input_bfd)->e_shstrndx,
1624 elf_section_data (input_section)->rel_hdr.sh_name));
1625 if (name == NULL)
1626 return FALSE;
1627
1628 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
1629 && strcmp (bfd_get_section_name (input_bfd,
1630 input_section),
1631 name + 5) == 0);
1632
1633 sreloc = bfd_get_section_by_name (dynobj, name);
1634 BFD_ASSERT (sreloc != NULL);
1635 }
1636
1637 skip = FALSE;
1638 relocate = FALSE;
1639
1640 outrel.r_offset =
1641 _bfd_elf_section_offset (output_bfd, info, input_section,
1642 rel->r_offset);
1643 if (outrel.r_offset == (bfd_vma) -1)
1644 skip = TRUE;
1645 if (outrel.r_offset == (bfd_vma) -2)
1646 skip = TRUE, relocate = TRUE;
1647 outrel.r_offset += (input_section->output_section->vma
1648 + input_section->output_offset);
1649
1650 if (skip)
1651 memset (&outrel, 0, sizeof outrel);
1652 /* h->dynindx may be -1 if the symbol was marked to
1653 become local. */
1654 else if (h != NULL
1655 && ((! info->symbolic && h->dynindx != -1)
1656 || !h->def_regular))
1657 {
1658 BFD_ASSERT (h->dynindx != -1);
1659 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1660 outrel.r_addend = relocation + rel->r_addend;
1661 }
1662 else
1663 {
1664 if (r_type == R_VAX_32)
1665 {
1666 relocate = TRUE;
1667 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1668 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1669 &contents[rel->r_offset]) == 0);
1670 outrel.r_addend = relocation + rel->r_addend;
1671 }
1672 else
1673 {
1674 long indx;
1675
1676 if (bfd_is_abs_section (sec))
1677 indx = 0;
1678 else if (sec == NULL || sec->owner == NULL)
1679 {
1680 bfd_set_error (bfd_error_bad_value);
1681 return FALSE;
1682 }
1683 else
1684 {
1685 asection *osec;
1686
1687 /* We are turning this relocation into one
1688 against a section symbol. It would be
1689 proper to subtract the symbol's value,
1690 osec->vma, from the emitted reloc addend,
1691 but ld.so expects buggy relocs. */
1692 osec = sec->output_section;
1693 indx = elf_section_data (osec)->dynindx;
1694 if (indx == 0)
1695 {
1696 struct elf_link_hash_table *htab;
1697 htab = elf_hash_table (info);
1698 osec = htab->text_index_section;
1699 indx = elf_section_data (osec)->dynindx;
1700 }
1701 BFD_ASSERT (indx != 0);
1702 }
1703
1704 outrel.r_info = ELF32_R_INFO (indx, r_type);
1705 outrel.r_addend = relocation + rel->r_addend;
1706 }
1707 }
1708
1709 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1710 ".text") != 0 ||
1711 (info->shared
1712 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1713 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1714 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1715 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1716 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1717 {
1718 if (h != NULL)
1719 (*_bfd_error_handler)
1720 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1721 bfd_get_filename (input_bfd), howto->name,
1722 h->root.root.string,
1723 bfd_get_section_name (input_bfd, input_section));
1724 else
1725 (*_bfd_error_handler)
1726 (_("%s: warning: %s relocation to 0x%x from %s section"),
1727 bfd_get_filename (input_bfd), howto->name,
1728 outrel.r_addend,
1729 bfd_get_section_name (input_bfd, input_section));
1730 }
1731 loc = sreloc->contents;
1732 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1733 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1734
1735 /* This reloc will be computed at runtime, so there's no
1736 need to do anything now, except for R_VAX_32
1737 relocations that have been turned into
1738 R_VAX_RELATIVE. */
1739 if (!relocate)
1740 continue;
1741 }
1742
1743 break;
1744
1745 case R_VAX_GNU_VTINHERIT:
1746 case R_VAX_GNU_VTENTRY:
1747 /* These are no-ops in the end. */
1748 continue;
1749
1750 default:
1751 break;
1752 }
1753
1754 /* VAX PCREL relocations are from the end of relocation, not the start.
1755 So subtract the difference from the relocation amount since we can't
1756 add it to the offset. */
1757 if (howto->pc_relative && howto->pcrel_offset)
1758 relocation -= bfd_get_reloc_size(howto);
1759
1760 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1761 contents, rel->r_offset,
1762 relocation, rel->r_addend);
1763
1764 if (r != bfd_reloc_ok)
1765 {
1766 switch (r)
1767 {
1768 default:
1769 case bfd_reloc_outofrange:
1770 abort ();
1771 case bfd_reloc_overflow:
1772 {
1773 const char *name;
1774
1775 if (h != NULL)
1776 name = NULL;
1777 else
1778 {
1779 name = bfd_elf_string_from_elf_section (input_bfd,
1780 symtab_hdr->sh_link,
1781 sym->st_name);
1782 if (name == NULL)
1783 return FALSE;
1784 if (*name == '\0')
1785 name = bfd_section_name (input_bfd, sec);
1786 }
1787 if (!(info->callbacks->reloc_overflow
1788 (info, (h ? &h->root : NULL), name, howto->name,
1789 (bfd_vma) 0, input_bfd, input_section,
1790 rel->r_offset)))
1791 return FALSE;
1792 }
1793 break;
1794 }
1795 }
1796 }
1797
1798 return TRUE;
1799 }
1800
1801 /* Finish up dynamic symbol handling. We set the contents of various
1802 dynamic sections here. */
1803
1804 static bfd_boolean
1805 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1806 struct elf_link_hash_entry *h,
1807 Elf_Internal_Sym *sym)
1808 {
1809 bfd *dynobj;
1810
1811 dynobj = elf_hash_table (info)->dynobj;
1812
1813 if (h->plt.offset != (bfd_vma) -1)
1814 {
1815 asection *splt;
1816 asection *sgot;
1817 asection *srela;
1818 bfd_vma plt_index;
1819 bfd_vma got_offset;
1820 bfd_vma addend;
1821 Elf_Internal_Rela rela;
1822 bfd_byte *loc;
1823
1824 /* This symbol has an entry in the procedure linkage table. Set
1825 it up. */
1826 BFD_ASSERT (h->dynindx != -1);
1827
1828 splt = bfd_get_section_by_name (dynobj, ".plt");
1829 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1830 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1831 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1832
1833 addend = 2 * (h->plt.offset & 1);
1834 h->plt.offset &= ~1;
1835
1836 /* Get the index in the procedure linkage table which
1837 corresponds to this symbol. This is the index of this symbol
1838 in all the symbols for which we are making plt entries. The
1839 first entry in the procedure linkage table is reserved. */
1840 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1841
1842 /* Get the offset into the .got table of the entry that
1843 corresponds to this function. Each .got entry is 4 bytes.
1844 The first two are reserved. */
1845 got_offset = (plt_index + 3) * 4;
1846
1847 /* Fill in the entry in the procedure linkage table. */
1848 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1849 PLT_ENTRY_SIZE);
1850
1851 /* The offset is relative to the first extension word. */
1852 bfd_put_32 (output_bfd,
1853 -(h->plt.offset + 8),
1854 splt->contents + h->plt.offset + 4);
1855
1856 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1857 splt->contents + h->plt.offset + 8);
1858
1859 /* Fill in the entry in the global offset table. */
1860 bfd_put_32 (output_bfd,
1861 (splt->output_section->vma
1862 + splt->output_offset
1863 + h->plt.offset) + addend,
1864 sgot->contents + got_offset);
1865
1866 /* Fill in the entry in the .rela.plt section. */
1867 rela.r_offset = (sgot->output_section->vma
1868 + sgot->output_offset
1869 + got_offset);
1870 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1871 rela.r_addend = addend;
1872 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1873 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1874
1875 if (!h->def_regular)
1876 {
1877 /* Mark the symbol as undefined, rather than as defined in
1878 the .plt section. Leave the value alone. */
1879 sym->st_shndx = SHN_UNDEF;
1880 }
1881 }
1882
1883 if (h->got.offset != (bfd_vma) -1)
1884 {
1885 asection *sgot;
1886 asection *srela;
1887 Elf_Internal_Rela rela;
1888 bfd_byte *loc;
1889
1890 /* This symbol has an entry in the global offset table. Set it
1891 up. */
1892 sgot = bfd_get_section_by_name (dynobj, ".got");
1893 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1894 BFD_ASSERT (sgot != NULL && srela != NULL);
1895
1896 rela.r_offset = (sgot->output_section->vma
1897 + sgot->output_offset
1898 + (h->got.offset &~ 1));
1899
1900 /* If the symbol was forced to be local because of a version file
1901 locally we just want to emit a RELATIVE reloc. The entry in
1902 the global offset table will already have been initialized in
1903 the relocate_section function. */
1904 if (info->shared
1905 && h->dynindx == -1
1906 && h->def_regular)
1907 {
1908 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1909 }
1910 else
1911 {
1912 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1913 }
1914 rela.r_addend = bfd_get_signed_32 (output_bfd,
1915 (sgot->contents
1916 + (h->got.offset & ~1)));
1917
1918 loc = srela->contents;
1919 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1920 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1921 }
1922
1923 if (h->needs_copy)
1924 {
1925 asection *s;
1926 Elf_Internal_Rela rela;
1927 bfd_byte *loc;
1928
1929 /* This symbol needs a copy reloc. Set it up. */
1930 BFD_ASSERT (h->dynindx != -1
1931 && (h->root.type == bfd_link_hash_defined
1932 || h->root.type == bfd_link_hash_defweak));
1933
1934 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1935 ".rela.bss");
1936 BFD_ASSERT (s != NULL);
1937
1938 rela.r_offset = (h->root.u.def.value
1939 + h->root.u.def.section->output_section->vma
1940 + h->root.u.def.section->output_offset);
1941 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1942 rela.r_addend = 0;
1943 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1944 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1945 }
1946
1947 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1948 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1949 || h == elf_hash_table (info)->hgot)
1950 sym->st_shndx = SHN_ABS;
1951
1952 return TRUE;
1953 }
1954
1955 /* Finish up the dynamic sections. */
1956
1957 static bfd_boolean
1958 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1959 {
1960 bfd *dynobj;
1961 asection *sgot;
1962 asection *sdyn;
1963
1964 dynobj = elf_hash_table (info)->dynobj;
1965
1966 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1967 BFD_ASSERT (sgot != NULL);
1968 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1969
1970 if (elf_hash_table (info)->dynamic_sections_created)
1971 {
1972 asection *splt;
1973 Elf32_External_Dyn *dyncon, *dynconend;
1974
1975 splt = bfd_get_section_by_name (dynobj, ".plt");
1976 BFD_ASSERT (splt != NULL && sdyn != NULL);
1977
1978 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1979 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1980 for (; dyncon < dynconend; dyncon++)
1981 {
1982 Elf_Internal_Dyn dyn;
1983 const char *name;
1984 asection *s;
1985
1986 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1987
1988 switch (dyn.d_tag)
1989 {
1990 default:
1991 break;
1992
1993 case DT_PLTGOT:
1994 name = ".got";
1995 goto get_vma;
1996 case DT_JMPREL:
1997 name = ".rela.plt";
1998 get_vma:
1999 s = bfd_get_section_by_name (output_bfd, name);
2000 BFD_ASSERT (s != NULL);
2001 dyn.d_un.d_ptr = s->vma;
2002 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2003 break;
2004
2005 case DT_PLTRELSZ:
2006 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2007 BFD_ASSERT (s != NULL);
2008 dyn.d_un.d_val = s->size;
2009 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2010 break;
2011
2012 case DT_RELASZ:
2013 /* The procedure linkage table relocs (DT_JMPREL) should
2014 not be included in the overall relocs (DT_RELA).
2015 Therefore, we override the DT_RELASZ entry here to
2016 make it not include the JMPREL relocs. Since the
2017 linker script arranges for .rela.plt to follow all
2018 other relocation sections, we don't have to worry
2019 about changing the DT_RELA entry. */
2020 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2021 if (s != NULL)
2022 dyn.d_un.d_val -= s->size;
2023 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2024 break;
2025 }
2026 }
2027
2028 /* Fill in the first entry in the procedure linkage table. */
2029 if (splt->size > 0)
2030 {
2031 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2032 bfd_put_32 (output_bfd,
2033 (sgot->output_section->vma
2034 + sgot->output_offset + 4
2035 - (splt->output_section->vma + 6)),
2036 splt->contents + 2);
2037 bfd_put_32 (output_bfd,
2038 (sgot->output_section->vma
2039 + sgot->output_offset + 8
2040 - (splt->output_section->vma + 12)),
2041 splt->contents + 8);
2042 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2043 = PLT_ENTRY_SIZE;
2044 }
2045 }
2046
2047 /* Fill in the first three entries in the global offset table. */
2048 if (sgot->size > 0)
2049 {
2050 if (sdyn == NULL)
2051 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2052 else
2053 bfd_put_32 (output_bfd,
2054 sdyn->output_section->vma + sdyn->output_offset,
2055 sgot->contents);
2056 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2057 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2058 }
2059
2060 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2061
2062 return TRUE;
2063 }
2064
2065 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2066 #define TARGET_LITTLE_NAME "elf32-vax"
2067 #define ELF_MACHINE_CODE EM_VAX
2068 #define ELF_MAXPAGESIZE 0x1000
2069
2070 #define elf_backend_create_dynamic_sections \
2071 _bfd_elf_create_dynamic_sections
2072 #define bfd_elf32_bfd_link_hash_table_create \
2073 elf_vax_link_hash_table_create
2074 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2075
2076 #define elf_backend_check_relocs elf_vax_check_relocs
2077 #define elf_backend_adjust_dynamic_symbol \
2078 elf_vax_adjust_dynamic_symbol
2079 #define elf_backend_size_dynamic_sections \
2080 elf_vax_size_dynamic_sections
2081 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2082 #define elf_backend_relocate_section elf_vax_relocate_section
2083 #define elf_backend_finish_dynamic_symbol \
2084 elf_vax_finish_dynamic_symbol
2085 #define elf_backend_finish_dynamic_sections \
2086 elf_vax_finish_dynamic_sections
2087 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2088 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2089 #define bfd_elf32_bfd_merge_private_bfd_data \
2090 elf32_vax_merge_private_bfd_data
2091 #define bfd_elf32_bfd_set_private_flags \
2092 elf32_vax_set_private_flags
2093 #define bfd_elf32_bfd_print_private_bfd_data \
2094 elf32_vax_print_private_bfd_data
2095
2096 #define elf_backend_can_gc_sections 1
2097 #define elf_backend_want_got_plt 1
2098 #define elf_backend_plt_readonly 1
2099 #define elf_backend_want_plt_sym 0
2100 #define elf_backend_got_header_size 16
2101 #define elf_backend_rela_normal 1
2102
2103 #include "elf32-target.h"
GDB Binutils - Deliverables
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