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2008-01-11 Tristan Gingold <gingold@adacore.com>
[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 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28 #include "elf/vax.h"
29
30 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
31 static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
32 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
33 struct bfd_hash_table *,
34 const char *);
35 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
36 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
37 asection *, const Elf_Internal_Rela *);
38 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
39 struct elf_link_hash_entry *);
40 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
41 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
42 bfd *, asection *, bfd_byte *,
43 Elf_Internal_Rela *,
44 Elf_Internal_Sym *, asection **);
45 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
46 struct elf_link_hash_entry *,
47 Elf_Internal_Sym *);
48 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
49 struct bfd_link_info *);
50
51 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
52 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
53 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, PTR);
54
55 static reloc_howto_type howto_table[] = {
56 HOWTO (R_VAX_NONE, /* type */
57 0, /* rightshift */
58 0, /* size (0 = byte, 1 = short, 2 = long) */
59 0, /* bitsize */
60 FALSE, /* pc_relative */
61 0, /* bitpos */
62 complain_overflow_dont, /* complain_on_overflow */
63 bfd_elf_generic_reloc, /* special_function */
64 "R_VAX_NONE", /* name */
65 FALSE, /* partial_inplace */
66 0, /* src_mask */
67 0x00000000, /* dst_mask */
68 FALSE), /* pcrel_offset */
69
70 HOWTO (R_VAX_32, /* type */
71 0, /* rightshift */
72 2, /* size (0 = byte, 1 = short, 2 = long) */
73 32, /* bitsize */
74 FALSE, /* pc_relative */
75 0, /* bitpos */
76 complain_overflow_bitfield, /* complain_on_overflow */
77 bfd_elf_generic_reloc, /* special_function */
78 "R_VAX_32", /* name */
79 FALSE, /* partial_inplace */
80 0, /* src_mask */
81 0xffffffff, /* dst_mask */
82 FALSE), /* pcrel_offset */
83
84 HOWTO (R_VAX_16, /* type */
85 0, /* rightshift */
86 1, /* size (0 = byte, 1 = short, 2 = long) */
87 16, /* bitsize */
88 FALSE, /* pc_relative */
89 0, /* bitpos */
90 complain_overflow_bitfield, /* complain_on_overflow */
91 bfd_elf_generic_reloc, /* special_function */
92 "R_VAX_16", /* name */
93 FALSE, /* partial_inplace */
94 0, /* src_mask */
95 0x0000ffff, /* dst_mask */
96 FALSE), /* pcrel_offset */
97
98 HOWTO (R_VAX_8, /* type */
99 0, /* rightshift */
100 0, /* size (0 = byte, 1 = short, 2 = long) */
101 8, /* bitsize */
102 FALSE, /* pc_relative */
103 0, /* bitpos */
104 complain_overflow_bitfield, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_VAX_8", /* name */
107 FALSE, /* partial_inplace */
108 0, /* src_mask */
109 0x000000ff, /* dst_mask */
110 FALSE), /* pcrel_offset */
111
112 HOWTO (R_VAX_PC32, /* type */
113 0, /* rightshift */
114 2, /* size (0 = byte, 1 = short, 2 = long) */
115 32, /* bitsize */
116 TRUE, /* pc_relative */
117 0, /* bitpos */
118 complain_overflow_bitfield, /* complain_on_overflow */
119 bfd_elf_generic_reloc, /* special_function */
120 "R_VAX_PC32", /* name */
121 FALSE, /* partial_inplace */
122 0, /* src_mask */
123 0xffffffff, /* dst_mask */
124 TRUE), /* pcrel_offset */
125
126 HOWTO (R_VAX_PC16, /* type */
127 0, /* rightshift */
128 1, /* size (0 = byte, 1 = short, 2 = long) */
129 16, /* bitsize */
130 TRUE, /* pc_relative */
131 0, /* bitpos */
132 complain_overflow_signed, /* complain_on_overflow */
133 bfd_elf_generic_reloc, /* special_function */
134 "R_VAX_PC16", /* name */
135 FALSE, /* partial_inplace */
136 0, /* src_mask */
137 0x0000ffff, /* dst_mask */
138 TRUE), /* pcrel_offset */
139
140 HOWTO (R_VAX_PC8, /* type */
141 0, /* rightshift */
142 0, /* size (0 = byte, 1 = short, 2 = long) */
143 8, /* bitsize */
144 TRUE, /* pc_relative */
145 0, /* bitpos */
146 complain_overflow_signed, /* complain_on_overflow */
147 bfd_elf_generic_reloc, /* special_function */
148 "R_VAX_PC8", /* name */
149 FALSE, /* partial_inplace */
150 0, /* src_mask */
151 0x000000ff, /* dst_mask */
152 TRUE), /* pcrel_offset */
153
154 HOWTO (R_VAX_GOT32, /* type */
155 0, /* rightshift */
156 2, /* size (0 = byte, 1 = short, 2 = long) */
157 32, /* bitsize */
158 TRUE, /* pc_relative */
159 0, /* bitpos */
160 complain_overflow_bitfield, /* complain_on_overflow */
161 bfd_elf_generic_reloc, /* special_function */
162 "R_VAX_GOT32", /* name */
163 FALSE, /* partial_inplace */
164 0, /* src_mask */
165 0xffffffff, /* dst_mask */
166 TRUE), /* pcrel_offset */
167
168 EMPTY_HOWTO (-1),
169 EMPTY_HOWTO (-1),
170 EMPTY_HOWTO (-1),
171 EMPTY_HOWTO (-1),
172 EMPTY_HOWTO (-1),
173
174 HOWTO (R_VAX_PLT32, /* type */
175 0, /* rightshift */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
177 32, /* bitsize */
178 TRUE, /* pc_relative */
179 0, /* bitpos */
180 complain_overflow_bitfield, /* complain_on_overflow */
181 bfd_elf_generic_reloc, /* special_function */
182 "R_VAX_PLT32", /* name */
183 FALSE, /* partial_inplace */
184 0, /* src_mask */
185 0xffffffff, /* dst_mask */
186 TRUE), /* pcrel_offset */
187
188 EMPTY_HOWTO (-1),
189 EMPTY_HOWTO (-1),
190 EMPTY_HOWTO (-1),
191 EMPTY_HOWTO (-1),
192 EMPTY_HOWTO (-1),
193
194 HOWTO (R_VAX_COPY, /* type */
195 0, /* rightshift */
196 0, /* size (0 = byte, 1 = short, 2 = long) */
197 0, /* bitsize */
198 FALSE, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_dont, /* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_VAX_COPY", /* name */
203 FALSE, /* partial_inplace */
204 0, /* src_mask */
205 0xffffffff, /* dst_mask */
206 FALSE), /* pcrel_offset */
207
208 HOWTO (R_VAX_GLOB_DAT, /* type */
209 0, /* rightshift */
210 2, /* size (0 = byte, 1 = short, 2 = long) */
211 32, /* bitsize */
212 FALSE, /* pc_relative */
213 0, /* bitpos */
214 complain_overflow_dont, /* complain_on_overflow */
215 bfd_elf_generic_reloc, /* special_function */
216 "R_VAX_GLOB_DAT", /* name */
217 FALSE, /* partial_inplace */
218 0, /* src_mask */
219 0xffffffff, /* dst_mask */
220 FALSE), /* pcrel_offset */
221
222 HOWTO (R_VAX_JMP_SLOT, /* type */
223 0, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 32, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_dont, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_VAX_JMP_SLOT", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0xffffffff, /* dst_mask */
234 FALSE), /* pcrel_offset */
235
236 HOWTO (R_VAX_RELATIVE, /* type */
237 0, /* rightshift */
238 2, /* size (0 = byte, 1 = short, 2 = long) */
239 32, /* bitsize */
240 FALSE, /* pc_relative */
241 0, /* bitpos */
242 complain_overflow_dont, /* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_VAX_RELATIVE", /* name */
245 FALSE, /* partial_inplace */
246 0, /* src_mask */
247 0xffffffff, /* dst_mask */
248 FALSE), /* pcrel_offset */
249
250 /* GNU extension to record C++ vtable hierarchy */
251 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
252 0, /* rightshift */
253 2, /* size (0 = byte, 1 = short, 2 = long) */
254 0, /* bitsize */
255 FALSE, /* pc_relative */
256 0, /* bitpos */
257 complain_overflow_dont, /* complain_on_overflow */
258 NULL, /* special_function */
259 "R_VAX_GNU_VTINHERIT", /* name */
260 FALSE, /* partial_inplace */
261 0, /* src_mask */
262 0, /* dst_mask */
263 FALSE), /* pcrel_offset */
264
265 /* GNU extension to record C++ vtable member usage */
266 HOWTO (R_VAX_GNU_VTENTRY, /* type */
267 0, /* rightshift */
268 2, /* size (0 = byte, 1 = short, 2 = long) */
269 0, /* bitsize */
270 FALSE, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_dont, /* complain_on_overflow */
273 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
274 "R_VAX_GNU_VTENTRY", /* name */
275 FALSE, /* partial_inplace */
276 0, /* src_mask */
277 0, /* dst_mask */
278 FALSE), /* pcrel_offset */
279 };
280
281 static void
282 rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
283 Elf_Internal_Rela *dst)
284 {
285 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
286 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
287 }
288
289 #define elf_info_to_howto rtype_to_howto
290
291 static const struct
292 {
293 bfd_reloc_code_real_type bfd_val;
294 int elf_val;
295 } reloc_map[] = {
296 { BFD_RELOC_NONE, R_VAX_NONE },
297 { BFD_RELOC_32, R_VAX_32 },
298 { BFD_RELOC_16, R_VAX_16 },
299 { BFD_RELOC_8, R_VAX_8 },
300 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
301 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
302 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
303 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
304 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
305 { BFD_RELOC_NONE, R_VAX_COPY },
306 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
307 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
308 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
309 { BFD_RELOC_CTOR, R_VAX_32 },
310 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
311 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
312 };
313
314 static reloc_howto_type *
315 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
316 {
317 unsigned int i;
318 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
319 {
320 if (reloc_map[i].bfd_val == code)
321 return &howto_table[reloc_map[i].elf_val];
322 }
323 return 0;
324 }
325
326 static reloc_howto_type *
327 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
328 const char *r_name)
329 {
330 unsigned int i;
331
332 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
333 if (howto_table[i].name != NULL
334 && strcasecmp (howto_table[i].name, r_name) == 0)
335 return &howto_table[i];
336
337 return NULL;
338 }
339
340 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
341 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_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 (struct elf_vax_link_hash_entry *,
418 PTR);
419
420 /* Declare this now that the above structures are defined. */
421
422 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
423 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 (*) (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) ((struct elf_vax_link_hash_table *) (p)->hash)
436
437 /* Create an entry in an VAX ELF linker hash table. */
438
439 static struct bfd_hash_entry *
440 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
441 struct bfd_hash_table *table,
442 const char *string)
443 {
444 struct elf_vax_link_hash_entry *ret =
445 (struct elf_vax_link_hash_entry *) entry;
446
447 /* Allocate the structure if it has not already been allocated by a
448 subclass. */
449 if (ret == NULL)
450 ret = ((struct elf_vax_link_hash_entry *)
451 bfd_hash_allocate (table,
452 sizeof (struct elf_vax_link_hash_entry)));
453 if (ret == NULL)
454 return (struct bfd_hash_entry *) ret;
455
456 /* Call the allocation method of the superclass. */
457 ret = ((struct elf_vax_link_hash_entry *)
458 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
459 table, string));
460 if (ret != NULL)
461 {
462 ret->pcrel_relocs_copied = NULL;
463 }
464
465 return (struct bfd_hash_entry *) ret;
466 }
467
468 /* Create an VAX ELF linker hash table. */
469
470 static struct bfd_link_hash_table *
471 elf_vax_link_hash_table_create (bfd *abfd)
472 {
473 struct elf_vax_link_hash_table *ret;
474 bfd_size_type amt = sizeof (struct elf_vax_link_hash_table);
475
476 ret = bfd_malloc (amt);
477 if (ret == NULL)
478 return NULL;
479
480 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
481 elf_vax_link_hash_newfunc,
482 sizeof (struct elf_vax_link_hash_entry)))
483 {
484 free (ret);
485 return NULL;
486 }
487
488 return &ret->root.root;
489 }
490
491 /* Keep vax-specific flags in the ELF header */
492 static bfd_boolean
493 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
494 {
495 elf_elfheader (abfd)->e_flags = flags;
496 elf_flags_init (abfd) = TRUE;
497 return TRUE;
498 }
499
500 /* Merge backend specific data from an object file to the output
501 object file when linking. */
502 static bfd_boolean
503 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
504 {
505 flagword out_flags;
506 flagword in_flags;
507
508 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
509 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
510 return TRUE;
511
512 in_flags = elf_elfheader (ibfd)->e_flags;
513 out_flags = elf_elfheader (obfd)->e_flags;
514
515 if (!elf_flags_init (obfd))
516 {
517 elf_flags_init (obfd) = TRUE;
518 elf_elfheader (obfd)->e_flags = in_flags;
519 }
520
521 return TRUE;
522 }
523
524 /* Display the flags field */
525 static bfd_boolean
526 elf32_vax_print_private_bfd_data (bfd *abfd, PTR ptr)
527 {
528 FILE *file = (FILE *) ptr;
529
530 BFD_ASSERT (abfd != NULL && ptr != NULL);
531
532 /* Print normal ELF private data. */
533 _bfd_elf_print_private_bfd_data (abfd, ptr);
534
535 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
536
537 /* xgettext:c-format */
538 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
539
540 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
541 fprintf (file, _(" [nonpic]"));
542
543 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
544 fprintf (file, _(" [d-float]"));
545
546 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
547 fprintf (file, _(" [g-float]"));
548
549 fputc ('\n', file);
550
551 return TRUE;
552 }
553 /* Look through the relocs for a section during the first phase, and
554 allocate space in the global offset table or procedure linkage
555 table. */
556
557 static bfd_boolean
558 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
559 const Elf_Internal_Rela *relocs)
560 {
561 bfd *dynobj;
562 Elf_Internal_Shdr *symtab_hdr;
563 struct elf_link_hash_entry **sym_hashes;
564 const Elf_Internal_Rela *rel;
565 const Elf_Internal_Rela *rel_end;
566 asection *sgot;
567 asection *srelgot;
568 asection *sreloc;
569
570 if (info->relocatable)
571 return TRUE;
572
573 dynobj = elf_hash_table (info)->dynobj;
574 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
575 sym_hashes = elf_sym_hashes (abfd);
576
577 sgot = NULL;
578 srelgot = NULL;
579 sreloc = NULL;
580
581 rel_end = relocs + sec->reloc_count;
582 for (rel = relocs; rel < rel_end; rel++)
583 {
584 unsigned long r_symndx;
585 struct elf_link_hash_entry *h;
586
587 r_symndx = ELF32_R_SYM (rel->r_info);
588
589 if (r_symndx < symtab_hdr->sh_info)
590 h = NULL;
591 else
592 {
593 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
594 while (h->root.type == bfd_link_hash_indirect
595 || h->root.type == bfd_link_hash_warning)
596 h = (struct elf_link_hash_entry *) h->root.u.i.link;
597 }
598
599 switch (ELF32_R_TYPE (rel->r_info))
600 {
601 case R_VAX_GOT32:
602 if (h != NULL
603 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
604 break;
605
606 /* This symbol requires a global offset table entry. */
607
608 if (dynobj == NULL)
609 {
610 /* Create the .got section. */
611 elf_hash_table (info)->dynobj = dynobj = abfd;
612 if (!_bfd_elf_create_got_section (dynobj, info))
613 return FALSE;
614 }
615
616 if (sgot == NULL)
617 {
618 sgot = bfd_get_section_by_name (dynobj, ".got");
619 BFD_ASSERT (sgot != NULL);
620 }
621
622 if (srelgot == NULL
623 && (h != NULL || info->shared))
624 {
625 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
626 if (srelgot == NULL)
627 {
628 srelgot = bfd_make_section_with_flags (dynobj,
629 ".rela.got",
630 (SEC_ALLOC
631 | SEC_LOAD
632 | SEC_HAS_CONTENTS
633 | SEC_IN_MEMORY
634 | SEC_LINKER_CREATED
635 | SEC_READONLY));
636 if (srelgot == NULL
637 || !bfd_set_section_alignment (dynobj, srelgot, 2))
638 return FALSE;
639 }
640 }
641
642 if (h != NULL)
643 {
644 struct elf_vax_link_hash_entry *eh;
645
646 eh = (struct elf_vax_link_hash_entry *) h;
647 if (h->got.refcount == -1)
648 {
649 h->got.refcount = 1;
650 eh->got_addend = rel->r_addend;
651 }
652 else
653 {
654 h->got.refcount++;
655 if (eh->got_addend != (bfd_vma) rel->r_addend)
656 (*_bfd_error_handler)
657 (_("%s: warning: GOT addend of %ld to `%s' does not match previous GOT addend of %ld"),
658 bfd_get_filename (abfd), rel->r_addend,
659 h->root.root.string,
660 eh->got_addend);
661
662 }
663 }
664 break;
665
666 case R_VAX_PLT32:
667 /* This symbol requires a procedure linkage table entry. We
668 actually build the entry in adjust_dynamic_symbol,
669 because this might be a case of linking PIC code which is
670 never referenced by a dynamic object, in which case we
671 don't need to generate a procedure linkage table entry
672 after all. */
673
674 /* If this is a local symbol, we resolve it directly without
675 creating a procedure linkage table entry. */
676 if (h == NULL)
677 continue;
678
679 h->needs_plt = 1;
680 if (h->plt.refcount == -1)
681 h->plt.refcount = 1;
682 else
683 h->plt.refcount++;
684 break;
685
686 case R_VAX_PC8:
687 case R_VAX_PC16:
688 case R_VAX_PC32:
689 /* If we are creating a shared library and this is not a local
690 symbol, we need to copy the reloc into the shared library.
691 However when linking with -Bsymbolic and this is a global
692 symbol which is defined in an object we are including in the
693 link (i.e., DEF_REGULAR is set), then we can resolve the
694 reloc directly. At this point we have not seen all the input
695 files, so it is possible that DEF_REGULAR is not set now but
696 will be set later (it is never cleared). We account for that
697 possibility below by storing information in the
698 pcrel_relocs_copied field of the hash table entry. */
699 if (!(info->shared
700 && (sec->flags & SEC_ALLOC) != 0
701 && h != NULL
702 && (!info->symbolic
703 || !h->def_regular)))
704 {
705 if (h != NULL)
706 {
707 /* Make sure a plt entry is created for this symbol if
708 it turns out to be a function defined by a dynamic
709 object. */
710 if (h->plt.refcount == -1)
711 h->plt.refcount = 1;
712 else
713 h->plt.refcount++;
714 }
715 break;
716 }
717 /* Fall through. */
718 case R_VAX_8:
719 case R_VAX_16:
720 case R_VAX_32:
721 if (h != NULL)
722 {
723 /* Make sure a plt entry is created for this symbol if it
724 turns out to be a function defined by a dynamic object. */
725 if (h->plt.refcount == -1)
726 h->plt.refcount = 1;
727 else
728 h->plt.refcount++;
729 }
730
731 /* If we are creating a shared library, we need to copy the
732 reloc into the shared library. */
733 if (info->shared
734 && (sec->flags & SEC_ALLOC) != 0)
735 {
736 /* When creating a shared object, we must copy these
737 reloc types into the output file. We create a reloc
738 section in dynobj and make room for this reloc. */
739 if (sreloc == NULL)
740 {
741 const char *name;
742
743 name = (bfd_elf_string_from_elf_section
744 (abfd,
745 elf_elfheader (abfd)->e_shstrndx,
746 elf_section_data (sec)->rel_hdr.sh_name));
747 if (name == NULL)
748 return FALSE;
749
750 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
751 && strcmp (bfd_get_section_name (abfd, sec),
752 name + 5) == 0);
753
754 sreloc = bfd_get_section_by_name (dynobj, name);
755 if (sreloc == NULL)
756 {
757 sreloc = bfd_make_section_with_flags (dynobj,
758 name,
759 (SEC_ALLOC
760 | SEC_LOAD
761 | SEC_HAS_CONTENTS
762 | SEC_IN_MEMORY
763 | SEC_LINKER_CREATED
764 | SEC_READONLY));
765 if (sreloc == NULL
766 || !bfd_set_section_alignment (dynobj, sreloc, 2))
767 return FALSE;
768 }
769 if (sec->flags & SEC_READONLY)
770 info->flags |= DF_TEXTREL;
771 }
772
773 sreloc->size += sizeof (Elf32_External_Rela);
774
775 /* If we are linking with -Bsymbolic, we count the number of
776 PC relative relocations we have entered for this symbol,
777 so that we can discard them again if the symbol is later
778 defined by a regular object. Note that this function is
779 only called if we are using a vaxelf linker hash table,
780 which means that h is really a pointer to an
781 elf_vax_link_hash_entry. */
782 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
783 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
784 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
785 && info->symbolic)
786 {
787 struct elf_vax_link_hash_entry *eh;
788 struct elf_vax_pcrel_relocs_copied *p;
789
790 eh = (struct elf_vax_link_hash_entry *) h;
791
792 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
793 if (p->section == sreloc)
794 break;
795
796 if (p == NULL)
797 {
798 p = ((struct elf_vax_pcrel_relocs_copied *)
799 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
800 if (p == NULL)
801 return FALSE;
802 p->next = eh->pcrel_relocs_copied;
803 eh->pcrel_relocs_copied = p;
804 p->section = sreloc;
805 p->count = 0;
806 }
807
808 ++p->count;
809 }
810 }
811
812 break;
813
814 /* This relocation describes the C++ object vtable hierarchy.
815 Reconstruct it for later use during GC. */
816 case R_VAX_GNU_VTINHERIT:
817 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
818 return FALSE;
819 break;
820
821 /* This relocation describes which C++ vtable entries are actually
822 used. Record for later use during GC. */
823 case R_VAX_GNU_VTENTRY:
824 BFD_ASSERT (h != NULL);
825 if (h != NULL
826 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
827 return FALSE;
828 break;
829
830 default:
831 break;
832 }
833 }
834
835 return TRUE;
836 }
837
838 /* Return the section that should be marked against GC for a given
839 relocation. */
840
841 static asection *
842 elf_vax_gc_mark_hook (asection *sec,
843 struct bfd_link_info *info,
844 Elf_Internal_Rela *rel,
845 struct elf_link_hash_entry *h,
846 Elf_Internal_Sym *sym)
847 {
848 if (h != NULL)
849 switch (ELF32_R_TYPE (rel->r_info))
850 {
851 case R_VAX_GNU_VTINHERIT:
852 case R_VAX_GNU_VTENTRY:
853 return NULL;
854 }
855
856 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
857 }
858
859 /* Update the got entry reference counts for the section being removed. */
860
861 static bfd_boolean
862 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
863 const Elf_Internal_Rela *relocs)
864 {
865 Elf_Internal_Shdr *symtab_hdr;
866 struct elf_link_hash_entry **sym_hashes;
867 const Elf_Internal_Rela *rel, *relend;
868 bfd *dynobj;
869
870 if (info->relocatable)
871 return TRUE;
872
873 dynobj = elf_hash_table (info)->dynobj;
874 if (dynobj == NULL)
875 return TRUE;
876
877 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
878 sym_hashes = elf_sym_hashes (abfd);
879
880 relend = relocs + sec->reloc_count;
881 for (rel = relocs; rel < relend; rel++)
882 {
883 unsigned long r_symndx;
884 struct elf_link_hash_entry *h = NULL;
885
886 r_symndx = ELF32_R_SYM (rel->r_info);
887 if (r_symndx >= symtab_hdr->sh_info)
888 {
889 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
890 while (h->root.type == bfd_link_hash_indirect
891 || h->root.type == bfd_link_hash_warning)
892 h = (struct elf_link_hash_entry *) h->root.u.i.link;
893 }
894
895 switch (ELF32_R_TYPE (rel->r_info))
896 {
897 case R_VAX_GOT32:
898 if (h != NULL && h->got.refcount > 0)
899 --h->got.refcount;
900 break;
901
902 case R_VAX_PLT32:
903 case R_VAX_PC8:
904 case R_VAX_PC16:
905 case R_VAX_PC32:
906 case R_VAX_8:
907 case R_VAX_16:
908 case R_VAX_32:
909 if (h != NULL && h->plt.refcount > 0)
910 --h->plt.refcount;
911 break;
912
913 default:
914 break;
915 }
916 }
917
918 return TRUE;
919 }
920
921 /* Adjust a symbol defined by a dynamic object and referenced by a
922 regular object. The current definition is in some section of the
923 dynamic object, but we're not including those sections. We have to
924 change the definition to something the rest of the link can
925 understand. */
926
927 static bfd_boolean
928 elf_vax_adjust_dynamic_symbol (info, h)
929 struct bfd_link_info *info;
930 struct elf_link_hash_entry *h;
931 {
932 bfd *dynobj;
933 asection *s;
934
935 dynobj = elf_hash_table (info)->dynobj;
936
937 /* Make sure we know what is going on here. */
938 BFD_ASSERT (dynobj != NULL
939 && (h->needs_plt
940 || h->u.weakdef != NULL
941 || (h->def_dynamic
942 && h->ref_regular
943 && !h->def_regular)));
944
945 /* If this is a function, put it in the procedure linkage table. We
946 will fill in the contents of the procedure linkage table later,
947 when we know the address of the .got section. */
948 if (h->type == STT_FUNC
949 || h->needs_plt)
950 {
951 if (! info->shared
952 && !h->def_dynamic
953 && !h->ref_dynamic
954 /* We must always create the plt entry if it was referenced
955 by a PLTxxO relocation. In this case we already recorded
956 it as a dynamic symbol. */
957 && h->dynindx == -1)
958 {
959 /* This case can occur if we saw a PLTxx reloc in an input
960 file, but the symbol was never referred to by a dynamic
961 object. In such a case, we don't actually need to build
962 a procedure linkage table, and we can just do a PCxx
963 reloc instead. */
964 BFD_ASSERT (h->needs_plt);
965 h->plt.offset = (bfd_vma) -1;
966 return TRUE;
967 }
968
969 /* GC may have rendered this entry unused. */
970 if (h->plt.refcount <= 0)
971 {
972 h->needs_plt = 0;
973 h->plt.offset = (bfd_vma) -1;
974 return TRUE;
975 }
976
977 /* Make sure this symbol is output as a dynamic symbol. */
978 if (h->dynindx == -1)
979 {
980 if (! bfd_elf_link_record_dynamic_symbol (info, h))
981 return FALSE;
982 }
983
984 s = bfd_get_section_by_name (dynobj, ".plt");
985 BFD_ASSERT (s != NULL);
986
987 /* If this is the first .plt entry, make room for the special
988 first entry. */
989 if (s->size == 0)
990 {
991 s->size += PLT_ENTRY_SIZE;
992 }
993
994 /* If this symbol is not defined in a regular file, and we are
995 not generating a shared library, then set the symbol to this
996 location in the .plt. This is required to make function
997 pointers compare as equal between the normal executable and
998 the shared library. */
999 if (!info->shared
1000 && !h->def_regular)
1001 {
1002 h->root.u.def.section = s;
1003 h->root.u.def.value = s->size;
1004 }
1005
1006 h->plt.offset = s->size;
1007
1008 /* Make room for this entry. */
1009 s->size += PLT_ENTRY_SIZE;
1010
1011 /* We also need to make an entry in the .got.plt section, which
1012 will be placed in the .got section by the linker script. */
1013
1014 s = bfd_get_section_by_name (dynobj, ".got.plt");
1015 BFD_ASSERT (s != NULL);
1016 s->size += 4;
1017
1018 /* We also need to make an entry in the .rela.plt section. */
1019
1020 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1021 BFD_ASSERT (s != NULL);
1022 s->size += sizeof (Elf32_External_Rela);
1023
1024 return TRUE;
1025 }
1026
1027 /* Reinitialize the plt offset now that it is not used as a reference
1028 count any more. */
1029 h->plt.offset = (bfd_vma) -1;
1030
1031 /* If this is a weak symbol, and there is a real definition, the
1032 processor independent code will have arranged for us to see the
1033 real definition first, and we can just use the same value. */
1034 if (h->u.weakdef != NULL)
1035 {
1036 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1037 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1038 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1039 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1040 return TRUE;
1041 }
1042
1043 /* This is a reference to a symbol defined by a dynamic object which
1044 is not a function. */
1045
1046 /* If we are creating a shared library, we must presume that the
1047 only references to the symbol are via the global offset table.
1048 For such cases we need not do anything here; the relocations will
1049 be handled correctly by relocate_section. */
1050 if (info->shared)
1051 return TRUE;
1052
1053 if (h->size == 0)
1054 {
1055 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1056 h->root.root.string);
1057 return TRUE;
1058 }
1059
1060 /* We must allocate the symbol in our .dynbss section, which will
1061 become part of the .bss section of the executable. There will be
1062 an entry for this symbol in the .dynsym section. The dynamic
1063 object will contain position independent code, so all references
1064 from the dynamic object to this symbol will go through the global
1065 offset table. The dynamic linker will use the .dynsym entry to
1066 determine the address it must put in the global offset table, so
1067 both the dynamic object and the regular object will refer to the
1068 same memory location for the variable. */
1069
1070 s = bfd_get_section_by_name (dynobj, ".dynbss");
1071 BFD_ASSERT (s != NULL);
1072
1073 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1074 copy the initial value out of the dynamic object and into the
1075 runtime process image. We need to remember the offset into the
1076 .rela.bss section we are going to use. */
1077 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1078 {
1079 asection *srel;
1080
1081 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1082 BFD_ASSERT (srel != NULL);
1083 srel->size += sizeof (Elf32_External_Rela);
1084 h->needs_copy = 1;
1085 }
1086
1087 return _bfd_elf_adjust_dynamic_copy (h, s);
1088 }
1089
1090 /* Set the sizes of the dynamic sections. */
1091
1092 static bfd_boolean
1093 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1094 {
1095 bfd *dynobj;
1096 asection *s;
1097 bfd_boolean plt;
1098 bfd_boolean relocs;
1099 bfd_boolean reltext;
1100
1101 dynobj = elf_hash_table (info)->dynobj;
1102 BFD_ASSERT (dynobj != NULL);
1103
1104 if (elf_hash_table (info)->dynamic_sections_created)
1105 {
1106 /* Set the contents of the .interp section to the interpreter. */
1107 if (info->executable)
1108 {
1109 s = bfd_get_section_by_name (dynobj, ".interp");
1110 BFD_ASSERT (s != NULL);
1111 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1112 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1113 }
1114 }
1115 else
1116 {
1117 /* We may have created entries in the .rela.got and .got sections.
1118 However, if we are not creating the dynamic sections, we will
1119 not actually use these entries. Reset the size of .rela.got
1120 and .got, which will cause it to get stripped from the output
1121 file below. */
1122 s = bfd_get_section_by_name (dynobj, ".rela.got");
1123 if (s != NULL)
1124 s->size = 0;
1125 s = bfd_get_section_by_name (dynobj, ".got.plt");
1126 if (s != NULL)
1127 s->size = 0;
1128 s = bfd_get_section_by_name (dynobj, ".got");
1129 if (s != NULL)
1130 s->size = 0;
1131 }
1132
1133 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1134 relative relocs against symbols defined in a regular object. We
1135 allocated space for them in the check_relocs routine, but we will not
1136 fill them in in the relocate_section routine. */
1137 if (info->shared && info->symbolic)
1138 elf_vax_link_hash_traverse (elf_vax_hash_table (info),
1139 elf_vax_discard_copies,
1140 NULL);
1141
1142 /* If this is a -Bsymbolic shared link or a static link, we need to
1143 discard all the got entries we've recorded. Otherwise, we need to
1144 instantiate (allocate space for them). */
1145 elf_link_hash_traverse (elf_hash_table (info),
1146 elf_vax_instantiate_got_entries,
1147 (PTR) info);
1148
1149 /* The check_relocs and adjust_dynamic_symbol entry points have
1150 determined the sizes of the various dynamic sections. Allocate
1151 memory for them. */
1152 plt = FALSE;
1153 relocs = FALSE;
1154 reltext = FALSE;
1155 for (s = dynobj->sections; s != NULL; s = s->next)
1156 {
1157 const char *name;
1158
1159 if ((s->flags & SEC_LINKER_CREATED) == 0)
1160 continue;
1161
1162 /* It's OK to base decisions on the section name, because none
1163 of the dynobj section names depend upon the input files. */
1164 name = bfd_get_section_name (dynobj, s);
1165
1166 if (strcmp (name, ".plt") == 0)
1167 {
1168 /* Remember whether there is a PLT. */
1169 plt = s->size != 0;
1170 }
1171 else if (CONST_STRNEQ (name, ".rela"))
1172 {
1173 if (s->size != 0)
1174 {
1175 asection *target;
1176
1177 /* Remember whether there are any reloc sections other
1178 than .rela.plt. */
1179 if (strcmp (name, ".rela.plt") != 0)
1180 {
1181 const char *outname;
1182
1183 relocs = TRUE;
1184
1185 /* If this relocation section applies to a read only
1186 section, then we probably need a DT_TEXTREL
1187 entry. .rela.plt is actually associated with
1188 .got.plt, which is never readonly. */
1189 outname = bfd_get_section_name (output_bfd,
1190 s->output_section);
1191 target = bfd_get_section_by_name (output_bfd, outname + 5);
1192 if (target != NULL
1193 && (target->flags & SEC_READONLY) != 0
1194 && (target->flags & SEC_ALLOC) != 0)
1195 reltext = TRUE;
1196 }
1197
1198 /* We use the reloc_count field as a counter if we need
1199 to copy relocs into the output file. */
1200 s->reloc_count = 0;
1201 }
1202 }
1203 else if (! CONST_STRNEQ (name, ".got")
1204 && strcmp (name, ".dynbss") != 0)
1205 {
1206 /* It's not one of our sections, so don't allocate space. */
1207 continue;
1208 }
1209
1210 if (s->size == 0)
1211 {
1212 /* If we don't need this section, strip it from the
1213 output file. This is mostly to handle .rela.bss and
1214 .rela.plt. We must create both sections in
1215 create_dynamic_sections, because they must be created
1216 before the linker maps input sections to output
1217 sections. The linker does that before
1218 adjust_dynamic_symbol is called, and it is that
1219 function which decides whether anything needs to go
1220 into these sections. */
1221 s->flags |= SEC_EXCLUDE;
1222 continue;
1223 }
1224
1225 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1226 continue;
1227
1228 /* Allocate memory for the section contents. */
1229 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1230 if (s->contents == NULL)
1231 return FALSE;
1232 }
1233
1234 if (elf_hash_table (info)->dynamic_sections_created)
1235 {
1236 /* Add some entries to the .dynamic section. We fill in the
1237 values later, in elf_vax_finish_dynamic_sections, but we
1238 must add the entries now so that we get the correct size for
1239 the .dynamic section. The DT_DEBUG entry is filled in by the
1240 dynamic linker and used by the debugger. */
1241 #define add_dynamic_entry(TAG, VAL) \
1242 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1243
1244 if (!info->shared)
1245 {
1246 if (!add_dynamic_entry (DT_DEBUG, 0))
1247 return FALSE;
1248 }
1249
1250 if (plt)
1251 {
1252 if (!add_dynamic_entry (DT_PLTGOT, 0)
1253 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1254 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1255 || !add_dynamic_entry (DT_JMPREL, 0))
1256 return FALSE;
1257 }
1258
1259 if (relocs)
1260 {
1261 if (!add_dynamic_entry (DT_RELA, 0)
1262 || !add_dynamic_entry (DT_RELASZ, 0)
1263 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1264 return FALSE;
1265 }
1266
1267 if (reltext || (info->flags & DF_TEXTREL) != 0)
1268 {
1269 if (!add_dynamic_entry (DT_TEXTREL, 0))
1270 return FALSE;
1271 }
1272 }
1273 #undef add_dynamic_entry
1274
1275 return TRUE;
1276 }
1277
1278 /* This function is called via elf_vax_link_hash_traverse if we are
1279 creating a shared object with -Bsymbolic. It discards the space
1280 allocated to copy PC relative relocs against symbols which are defined
1281 in regular objects. We allocated space for them in the check_relocs
1282 routine, but we won't fill them in in the relocate_section routine. */
1283
1284 static bfd_boolean
1285 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1286 PTR ignore ATTRIBUTE_UNUSED)
1287 {
1288 struct elf_vax_pcrel_relocs_copied *s;
1289
1290 if (h->root.root.type == bfd_link_hash_warning)
1291 h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
1292
1293 /* We only discard relocs for symbols defined in a regular object. */
1294 if (!h->root.def_regular)
1295 return TRUE;
1296
1297 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1298 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1299
1300 return TRUE;
1301 }
1302
1303 /* This function is called via elf_link_hash_traverse. It looks for entries
1304 that have GOT or PLT (.GOT) references. If creating a static object or a
1305 shared object with -Bsymbolic, it resets the reference count back to 0
1306 and sets the offset to -1 so normal PC32 relocation will be done. If
1307 creating a shared object or executable, space in the .got and .rela.got
1308 will be reserved for the symbol. */
1309
1310 static bfd_boolean
1311 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, PTR infoptr)
1312 {
1313 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1314 bfd *dynobj;
1315 asection *sgot;
1316 asection *srelgot;
1317
1318 /* We don't care about non-GOT (and non-PLT) entries. */
1319 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1320 return TRUE;
1321
1322 dynobj = elf_hash_table (info)->dynobj;
1323 if (dynobj == NULL)
1324 return TRUE;
1325
1326 sgot = bfd_get_section_by_name (dynobj, ".got");
1327 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1328
1329 if (!elf_hash_table (info)->dynamic_sections_created
1330 || (info->shared && info->symbolic))
1331 {
1332 h->got.refcount = 0;
1333 h->got.offset = (bfd_vma) -1;
1334 h->plt.refcount = 0;
1335 h->plt.offset = (bfd_vma) -1;
1336 }
1337 else if (h->got.refcount > 0)
1338 {
1339 /* Make sure this symbol is output as a dynamic symbol. */
1340 if (h->dynindx == -1)
1341 {
1342 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1343 return FALSE;
1344 }
1345
1346 /* Allocate space in the .got and .rela.got sections. */
1347 sgot->size += 4;
1348 srelgot->size += sizeof (Elf32_External_Rela);
1349 }
1350
1351 return TRUE;
1352 }
1353
1354 /* Relocate an VAX ELF section. */
1355
1356 static bfd_boolean
1357 elf_vax_relocate_section (bfd *output_bfd,
1358 struct bfd_link_info *info,
1359 bfd *input_bfd,
1360 asection *input_section,
1361 bfd_byte *contents,
1362 Elf_Internal_Rela *relocs,
1363 Elf_Internal_Sym *local_syms,
1364 asection **local_sections)
1365 {
1366 bfd *dynobj;
1367 Elf_Internal_Shdr *symtab_hdr;
1368 struct elf_link_hash_entry **sym_hashes;
1369 bfd_vma *local_got_offsets;
1370 bfd_vma plt_index;
1371 bfd_vma got_offset;
1372 asection *sgot;
1373 asection *splt;
1374 asection *sgotplt;
1375 asection *sreloc;
1376 Elf_Internal_Rela *rel;
1377 Elf_Internal_Rela *relend;
1378
1379 dynobj = elf_hash_table (info)->dynobj;
1380 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1381 sym_hashes = elf_sym_hashes (input_bfd);
1382 local_got_offsets = elf_local_got_offsets (input_bfd);
1383
1384 sgot = NULL;
1385 splt = NULL;
1386 sgotplt = NULL;
1387 sreloc = NULL;
1388
1389 rel = relocs;
1390 relend = relocs + input_section->reloc_count;
1391 for (; rel < relend; rel++)
1392 {
1393 int r_type;
1394 reloc_howto_type *howto;
1395 unsigned long r_symndx;
1396 struct elf_link_hash_entry *h;
1397 Elf_Internal_Sym *sym;
1398 asection *sec;
1399 bfd_vma relocation;
1400 bfd_reloc_status_type r;
1401
1402 r_type = ELF32_R_TYPE (rel->r_info);
1403 if (r_type < 0 || r_type >= (int) R_VAX_max)
1404 {
1405 bfd_set_error (bfd_error_bad_value);
1406 return FALSE;
1407 }
1408 howto = howto_table + r_type;
1409
1410 r_symndx = ELF32_R_SYM (rel->r_info);
1411 h = NULL;
1412 sym = NULL;
1413 sec = NULL;
1414 if (r_symndx < symtab_hdr->sh_info)
1415 {
1416 sym = local_syms + r_symndx;
1417 sec = local_sections[r_symndx];
1418 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1419 }
1420 else
1421 {
1422 bfd_boolean unresolved_reloc;
1423 bfd_boolean warned;
1424
1425 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1426 r_symndx, symtab_hdr, sym_hashes,
1427 h, sec, relocation,
1428 unresolved_reloc, warned);
1429
1430 if ((h->root.type == bfd_link_hash_defined
1431 || h->root.type == bfd_link_hash_defweak)
1432 && ((r_type == R_VAX_PLT32
1433 && h->plt.offset != (bfd_vma) -1
1434 && elf_hash_table (info)->dynamic_sections_created)
1435 || (r_type == R_VAX_GOT32
1436 && strcmp (h->root.root.string,
1437 "_GLOBAL_OFFSET_TABLE_") != 0
1438 && elf_hash_table (info)->dynamic_sections_created
1439 && (! info->shared
1440 || (! info->symbolic && h->dynindx != -1)
1441 || !h->def_regular))
1442 || (info->shared
1443 && ((! info->symbolic && h->dynindx != -1)
1444 || !h->def_regular)
1445 && ((input_section->flags & SEC_ALLOC) != 0
1446 /* DWARF will emit R_VAX_32 relocations in its
1447 sections against symbols defined externally
1448 in shared libraries. We can't do anything
1449 with them here. */
1450
1451 || ((input_section->flags & SEC_DEBUGGING) != 0
1452 && h->def_dynamic))
1453 && (r_type == R_VAX_8
1454 || r_type == R_VAX_16
1455 || r_type == R_VAX_32
1456 || r_type == R_VAX_PC8
1457 || r_type == R_VAX_PC16
1458 || r_type == R_VAX_PC32))))
1459 /* In these cases, we don't need the relocation
1460 value. We check specially because in some
1461 obscure cases sec->output_section will be NULL. */
1462 relocation = 0;
1463 }
1464
1465 if (sec != NULL && elf_discarded_section (sec))
1466 {
1467 /* For relocs against symbols from removed linkonce sections,
1468 or sections discarded by a linker script, we just want the
1469 section contents zeroed. Avoid any special processing. */
1470 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1471 rel->r_info = 0;
1472 rel->r_addend = 0;
1473 continue;
1474 }
1475
1476 if (info->relocatable)
1477 continue;
1478
1479 switch (r_type)
1480 {
1481 case R_VAX_GOT32:
1482 /* Relocation is to the address of the entry for this symbol
1483 in the global offset table. */
1484 if (h == NULL || h->got.offset == (bfd_vma) -1)
1485 break;
1486
1487 /* Relocation is the offset of the entry for this symbol in
1488 the global offset table. */
1489
1490 {
1491 bfd_vma off;
1492
1493 if (sgot == NULL)
1494 {
1495 sgot = bfd_get_section_by_name (dynobj, ".got");
1496 BFD_ASSERT (sgot != NULL);
1497 }
1498
1499 BFD_ASSERT (h != NULL);
1500 off = h->got.offset;
1501 BFD_ASSERT (off != (bfd_vma) -1);
1502 BFD_ASSERT (off < sgot->size);
1503
1504 if (info->shared
1505 && h->dynindx == -1
1506 && h->def_regular)
1507 {
1508 /* The symbol was forced to be local
1509 because of a version file.. We must initialize
1510 this entry in the global offset table. Since
1511 the offset must always be a multiple of 4, we
1512 use the least significant bit to record whether
1513 we have initialized it already.
1514
1515 When doing a dynamic link, we create a .rela.got
1516 relocation entry to initialize the value. This
1517 is done in the finish_dynamic_symbol routine. */
1518 if ((off & 1) != 0)
1519 off &= ~1;
1520 else
1521 {
1522 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1523 sgot->contents + off);
1524 h->got.offset |= 1;
1525 }
1526 } else {
1527 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1528 }
1529
1530 relocation = sgot->output_offset + off;
1531 /* The GOT relocation uses the addend. */
1532 rel->r_addend = 0;
1533
1534 /* Change the reference to be indirect. */
1535 contents[rel->r_offset - 1] |= 0x10;
1536 relocation += sgot->output_section->vma;
1537 }
1538 break;
1539
1540 case R_VAX_PLT32:
1541 /* Relocation is to the entry for this symbol in the
1542 procedure linkage table. */
1543
1544 /* Resolve a PLTxx reloc against a local symbol directly,
1545 without using the procedure linkage table. */
1546 if (h == NULL)
1547 break;
1548
1549 if (h->plt.offset == (bfd_vma) -1
1550 || !elf_hash_table (info)->dynamic_sections_created)
1551 {
1552 /* We didn't make a PLT entry for this symbol. This
1553 happens when statically linking PIC code, or when
1554 using -Bsymbolic. */
1555 break;
1556 }
1557
1558 if (splt == NULL)
1559 {
1560 splt = bfd_get_section_by_name (dynobj, ".plt");
1561 BFD_ASSERT (splt != NULL);
1562 }
1563
1564 if (sgotplt == NULL)
1565 {
1566 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1567 BFD_ASSERT (splt != NULL);
1568 }
1569
1570 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1571
1572 /* Get the offset into the .got table of the entry that
1573 corresponds to this function. Each .got entry is 4 bytes.
1574 The first two are reserved. */
1575 got_offset = (plt_index + 3) * 4;
1576
1577 /* We want the relocate to point into the .got.plt instead
1578 of the plt itself. */
1579 relocation = (sgotplt->output_section->vma
1580 + sgotplt->output_offset
1581 + got_offset);
1582 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1583 if (rel->r_addend == 2)
1584 {
1585 h->plt.offset |= 1;
1586 }
1587 else if (rel->r_addend != 0)
1588 (*_bfd_error_handler)
1589 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1590 bfd_get_filename (input_bfd), rel->r_addend,
1591 h->root.root.string,
1592 bfd_get_section_name (input_bfd, input_section));
1593 rel->r_addend = 0;
1594
1595 break;
1596
1597 case R_VAX_PC8:
1598 case R_VAX_PC16:
1599 case R_VAX_PC32:
1600 if (h == NULL)
1601 break;
1602 /* Fall through. */
1603 case R_VAX_8:
1604 case R_VAX_16:
1605 case R_VAX_32:
1606 if (info->shared
1607 && r_symndx != 0
1608 && (input_section->flags & SEC_ALLOC) != 0
1609 && ((r_type != R_VAX_PC8
1610 && r_type != R_VAX_PC16
1611 && r_type != R_VAX_PC32)
1612 || ((input_section->flags & SEC_CODE)
1613 && (!info->symbolic
1614 || (!h->def_regular && h->type != STT_SECTION)))))
1615 {
1616 Elf_Internal_Rela outrel;
1617 bfd_byte *loc;
1618 bfd_boolean skip, relocate;
1619
1620 /* When generating a shared object, these relocations
1621 are copied into the output file to be resolved at run
1622 time. */
1623 if (sreloc == NULL)
1624 {
1625 const char *name;
1626
1627 name = (bfd_elf_string_from_elf_section
1628 (input_bfd,
1629 elf_elfheader (input_bfd)->e_shstrndx,
1630 elf_section_data (input_section)->rel_hdr.sh_name));
1631 if (name == NULL)
1632 return FALSE;
1633
1634 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
1635 && strcmp (bfd_get_section_name (input_bfd,
1636 input_section),
1637 name + 5) == 0);
1638
1639 sreloc = bfd_get_section_by_name (dynobj, name);
1640 BFD_ASSERT (sreloc != NULL);
1641 }
1642
1643 skip = FALSE;
1644 relocate = FALSE;
1645
1646 outrel.r_offset =
1647 _bfd_elf_section_offset (output_bfd, info, input_section,
1648 rel->r_offset);
1649 if (outrel.r_offset == (bfd_vma) -1)
1650 skip = TRUE;
1651 if (outrel.r_offset == (bfd_vma) -2)
1652 skip = TRUE, relocate = TRUE;
1653 outrel.r_offset += (input_section->output_section->vma
1654 + input_section->output_offset);
1655
1656 if (skip)
1657 memset (&outrel, 0, sizeof outrel);
1658 /* h->dynindx may be -1 if the symbol was marked to
1659 become local. */
1660 else if (h != NULL
1661 && ((! info->symbolic && h->dynindx != -1)
1662 || !h->def_regular))
1663 {
1664 BFD_ASSERT (h->dynindx != -1);
1665 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1666 outrel.r_addend = relocation + rel->r_addend;
1667 }
1668 else
1669 {
1670 if (r_type == R_VAX_32)
1671 {
1672 relocate = TRUE;
1673 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1674 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1675 &contents[rel->r_offset]) == 0);
1676 outrel.r_addend = relocation + rel->r_addend;
1677 }
1678 else
1679 {
1680 long indx;
1681
1682 if (bfd_is_abs_section (sec))
1683 indx = 0;
1684 else if (sec == NULL || sec->owner == NULL)
1685 {
1686 bfd_set_error (bfd_error_bad_value);
1687 return FALSE;
1688 }
1689 else
1690 {
1691 asection *osec;
1692
1693 /* We are turning this relocation into one
1694 against a section symbol. It would be
1695 proper to subtract the symbol's value,
1696 osec->vma, from the emitted reloc addend,
1697 but ld.so expects buggy relocs. */
1698 osec = sec->output_section;
1699 indx = elf_section_data (osec)->dynindx;
1700 if (indx == 0)
1701 {
1702 struct elf_link_hash_table *htab;
1703 htab = elf_hash_table (info);
1704 osec = htab->text_index_section;
1705 indx = elf_section_data (osec)->dynindx;
1706 }
1707 BFD_ASSERT (indx != 0);
1708 }
1709
1710 outrel.r_info = ELF32_R_INFO (indx, r_type);
1711 outrel.r_addend = relocation + rel->r_addend;
1712 }
1713 }
1714
1715 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1716 ".text") != 0 ||
1717 (info->shared
1718 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1719 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1720 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1721 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1722 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1723 {
1724 if (h != NULL)
1725 (*_bfd_error_handler)
1726 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1727 bfd_get_filename (input_bfd), howto->name,
1728 h->root.root.string,
1729 bfd_get_section_name (input_bfd, input_section));
1730 else
1731 (*_bfd_error_handler)
1732 (_("%s: warning: %s relocation to 0x%x from %s section"),
1733 bfd_get_filename (input_bfd), howto->name,
1734 outrel.r_addend,
1735 bfd_get_section_name (input_bfd, input_section));
1736 }
1737 loc = sreloc->contents;
1738 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1739 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1740
1741 /* This reloc will be computed at runtime, so there's no
1742 need to do anything now, except for R_VAX_32
1743 relocations that have been turned into
1744 R_VAX_RELATIVE. */
1745 if (!relocate)
1746 continue;
1747 }
1748
1749 break;
1750
1751 case R_VAX_GNU_VTINHERIT:
1752 case R_VAX_GNU_VTENTRY:
1753 /* These are no-ops in the end. */
1754 continue;
1755
1756 default:
1757 break;
1758 }
1759
1760 /* VAX PCREL relocations are from the end of relocation, not the start.
1761 So subtract the difference from the relocation amount since we can't
1762 add it to the offset. */
1763 if (howto->pc_relative && howto->pcrel_offset)
1764 relocation -= bfd_get_reloc_size(howto);
1765
1766 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1767 contents, rel->r_offset,
1768 relocation, rel->r_addend);
1769
1770 if (r != bfd_reloc_ok)
1771 {
1772 switch (r)
1773 {
1774 default:
1775 case bfd_reloc_outofrange:
1776 abort ();
1777 case bfd_reloc_overflow:
1778 {
1779 const char *name;
1780
1781 if (h != NULL)
1782 name = NULL;
1783 else
1784 {
1785 name = bfd_elf_string_from_elf_section (input_bfd,
1786 symtab_hdr->sh_link,
1787 sym->st_name);
1788 if (name == NULL)
1789 return FALSE;
1790 if (*name == '\0')
1791 name = bfd_section_name (input_bfd, sec);
1792 }
1793 if (!(info->callbacks->reloc_overflow
1794 (info, (h ? &h->root : NULL), name, howto->name,
1795 (bfd_vma) 0, input_bfd, input_section,
1796 rel->r_offset)))
1797 return FALSE;
1798 }
1799 break;
1800 }
1801 }
1802 }
1803
1804 return TRUE;
1805 }
1806
1807 /* Finish up dynamic symbol handling. We set the contents of various
1808 dynamic sections here. */
1809
1810 static bfd_boolean
1811 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1812 struct elf_link_hash_entry *h,
1813 Elf_Internal_Sym *sym)
1814 {
1815 bfd *dynobj;
1816
1817 dynobj = elf_hash_table (info)->dynobj;
1818
1819 if (h->plt.offset != (bfd_vma) -1)
1820 {
1821 asection *splt;
1822 asection *sgot;
1823 asection *srela;
1824 bfd_vma plt_index;
1825 bfd_vma got_offset;
1826 bfd_vma addend;
1827 Elf_Internal_Rela rela;
1828 bfd_byte *loc;
1829
1830 /* This symbol has an entry in the procedure linkage table. Set
1831 it up. */
1832 BFD_ASSERT (h->dynindx != -1);
1833
1834 splt = bfd_get_section_by_name (dynobj, ".plt");
1835 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1836 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1837 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1838
1839 addend = 2 * (h->plt.offset & 1);
1840 h->plt.offset &= ~1;
1841
1842 /* Get the index in the procedure linkage table which
1843 corresponds to this symbol. This is the index of this symbol
1844 in all the symbols for which we are making plt entries. The
1845 first entry in the procedure linkage table is reserved. */
1846 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1847
1848 /* Get the offset into the .got table of the entry that
1849 corresponds to this function. Each .got entry is 4 bytes.
1850 The first two are reserved. */
1851 got_offset = (plt_index + 3) * 4;
1852
1853 /* Fill in the entry in the procedure linkage table. */
1854 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1855 PLT_ENTRY_SIZE);
1856
1857 /* The offset is relative to the first extension word. */
1858 bfd_put_32 (output_bfd,
1859 -(h->plt.offset + 8),
1860 splt->contents + h->plt.offset + 4);
1861
1862 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1863 splt->contents + h->plt.offset + 8);
1864
1865 /* Fill in the entry in the global offset table. */
1866 bfd_put_32 (output_bfd,
1867 (splt->output_section->vma
1868 + splt->output_offset
1869 + h->plt.offset) + addend,
1870 sgot->contents + got_offset);
1871
1872 /* Fill in the entry in the .rela.plt section. */
1873 rela.r_offset = (sgot->output_section->vma
1874 + sgot->output_offset
1875 + got_offset);
1876 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1877 rela.r_addend = addend;
1878 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1879 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1880
1881 if (!h->def_regular)
1882 {
1883 /* Mark the symbol as undefined, rather than as defined in
1884 the .plt section. Leave the value alone. */
1885 sym->st_shndx = SHN_UNDEF;
1886 }
1887 }
1888
1889 if (h->got.offset != (bfd_vma) -1)
1890 {
1891 asection *sgot;
1892 asection *srela;
1893 Elf_Internal_Rela rela;
1894 bfd_byte *loc;
1895
1896 /* This symbol has an entry in the global offset table. Set it
1897 up. */
1898 sgot = bfd_get_section_by_name (dynobj, ".got");
1899 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1900 BFD_ASSERT (sgot != NULL && srela != NULL);
1901
1902 rela.r_offset = (sgot->output_section->vma
1903 + sgot->output_offset
1904 + (h->got.offset &~ 1));
1905
1906 /* If the symbol was forced to be local because of a version file
1907 locally we just want to emit a RELATIVE reloc. The entry in
1908 the global offset table will already have been initialized in
1909 the relocate_section function. */
1910 if (info->shared
1911 && h->dynindx == -1
1912 && h->def_regular)
1913 {
1914 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1915 }
1916 else
1917 {
1918 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1919 }
1920 rela.r_addend = bfd_get_signed_32 (output_bfd,
1921 (sgot->contents
1922 + (h->got.offset & ~1)));
1923
1924 loc = srela->contents;
1925 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1926 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1927 }
1928
1929 if (h->needs_copy)
1930 {
1931 asection *s;
1932 Elf_Internal_Rela rela;
1933 bfd_byte *loc;
1934
1935 /* This symbol needs a copy reloc. Set it up. */
1936 BFD_ASSERT (h->dynindx != -1
1937 && (h->root.type == bfd_link_hash_defined
1938 || h->root.type == bfd_link_hash_defweak));
1939
1940 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1941 ".rela.bss");
1942 BFD_ASSERT (s != NULL);
1943
1944 rela.r_offset = (h->root.u.def.value
1945 + h->root.u.def.section->output_section->vma
1946 + h->root.u.def.section->output_offset);
1947 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1948 rela.r_addend = 0;
1949 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1950 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1951 }
1952
1953 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1954 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1955 || h == elf_hash_table (info)->hgot)
1956 sym->st_shndx = SHN_ABS;
1957
1958 return TRUE;
1959 }
1960
1961 /* Finish up the dynamic sections. */
1962
1963 static bfd_boolean
1964 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1965 {
1966 bfd *dynobj;
1967 asection *sgot;
1968 asection *sdyn;
1969
1970 dynobj = elf_hash_table (info)->dynobj;
1971
1972 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1973 BFD_ASSERT (sgot != NULL);
1974 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1975
1976 if (elf_hash_table (info)->dynamic_sections_created)
1977 {
1978 asection *splt;
1979 Elf32_External_Dyn *dyncon, *dynconend;
1980
1981 splt = bfd_get_section_by_name (dynobj, ".plt");
1982 BFD_ASSERT (splt != NULL && sdyn != NULL);
1983
1984 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1985 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1986 for (; dyncon < dynconend; dyncon++)
1987 {
1988 Elf_Internal_Dyn dyn;
1989 const char *name;
1990 asection *s;
1991
1992 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1993
1994 switch (dyn.d_tag)
1995 {
1996 default:
1997 break;
1998
1999 case DT_PLTGOT:
2000 name = ".got";
2001 goto get_vma;
2002 case DT_JMPREL:
2003 name = ".rela.plt";
2004 get_vma:
2005 s = bfd_get_section_by_name (output_bfd, name);
2006 BFD_ASSERT (s != NULL);
2007 dyn.d_un.d_ptr = s->vma;
2008 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2009 break;
2010
2011 case DT_PLTRELSZ:
2012 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2013 BFD_ASSERT (s != NULL);
2014 dyn.d_un.d_val = s->size;
2015 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2016 break;
2017
2018 case DT_RELASZ:
2019 /* The procedure linkage table relocs (DT_JMPREL) should
2020 not be included in the overall relocs (DT_RELA).
2021 Therefore, we override the DT_RELASZ entry here to
2022 make it not include the JMPREL relocs. Since the
2023 linker script arranges for .rela.plt to follow all
2024 other relocation sections, we don't have to worry
2025 about changing the DT_RELA entry. */
2026 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2027 if (s != NULL)
2028 dyn.d_un.d_val -= s->size;
2029 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2030 break;
2031 }
2032 }
2033
2034 /* Fill in the first entry in the procedure linkage table. */
2035 if (splt->size > 0)
2036 {
2037 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2038 bfd_put_32 (output_bfd,
2039 (sgot->output_section->vma
2040 + sgot->output_offset + 4
2041 - (splt->output_section->vma + 6)),
2042 splt->contents + 2);
2043 bfd_put_32 (output_bfd,
2044 (sgot->output_section->vma
2045 + sgot->output_offset + 8
2046 - (splt->output_section->vma + 12)),
2047 splt->contents + 8);
2048 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2049 = PLT_ENTRY_SIZE;
2050 }
2051 }
2052
2053 /* Fill in the first three entries in the global offset table. */
2054 if (sgot->size > 0)
2055 {
2056 if (sdyn == NULL)
2057 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2058 else
2059 bfd_put_32 (output_bfd,
2060 sdyn->output_section->vma + sdyn->output_offset,
2061 sgot->contents);
2062 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2063 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2064 }
2065
2066 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2067
2068 return TRUE;
2069 }
2070
2071 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2072 #define TARGET_LITTLE_NAME "elf32-vax"
2073 #define ELF_MACHINE_CODE EM_VAX
2074 #define ELF_MAXPAGESIZE 0x1000
2075
2076 #define elf_backend_create_dynamic_sections \
2077 _bfd_elf_create_dynamic_sections
2078 #define bfd_elf32_bfd_link_hash_table_create \
2079 elf_vax_link_hash_table_create
2080 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2081
2082 #define elf_backend_check_relocs elf_vax_check_relocs
2083 #define elf_backend_adjust_dynamic_symbol \
2084 elf_vax_adjust_dynamic_symbol
2085 #define elf_backend_size_dynamic_sections \
2086 elf_vax_size_dynamic_sections
2087 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2088 #define elf_backend_relocate_section elf_vax_relocate_section
2089 #define elf_backend_finish_dynamic_symbol \
2090 elf_vax_finish_dynamic_symbol
2091 #define elf_backend_finish_dynamic_sections \
2092 elf_vax_finish_dynamic_sections
2093 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2094 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2095 #define bfd_elf32_bfd_merge_private_bfd_data \
2096 elf32_vax_merge_private_bfd_data
2097 #define bfd_elf32_bfd_set_private_flags \
2098 elf32_vax_set_private_flags
2099 #define bfd_elf32_bfd_print_private_bfd_data \
2100 elf32_vax_print_private_bfd_data
2101
2102 #define elf_backend_can_gc_sections 1
2103 #define elf_backend_want_got_plt 1
2104 #define elf_backend_plt_readonly 1
2105 #define elf_backend_want_plt_sym 0
2106 #define elf_backend_got_header_size 16
2107 #define elf_backend_rela_normal 1
2108
2109 #include "elf32-target.h"
GDB Binutils - Deliverables
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