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[deliverable/binutils-gdb.git] / bfd / elf32-vax.c
1 /* VAX series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008 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 BFD_ASSERT (h != NULL);
603 if (h->forced_local
604 || h == elf_hash_table (info)->hgot
605 || h == elf_hash_table (info)->hplt)
606 break;
607
608 /* If this is a local symbol, we resolve it directly without
609 creating a global offset table entry. */
610 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
611 break;
612
613 /* This symbol requires a global offset table entry. */
614
615 if (dynobj == NULL)
616 {
617 /* Create the .got section. */
618 elf_hash_table (info)->dynobj = dynobj = abfd;
619 if (!_bfd_elf_create_got_section (dynobj, info))
620 return FALSE;
621 }
622
623 if (sgot == NULL)
624 {
625 sgot = bfd_get_section_by_name (dynobj, ".got");
626 BFD_ASSERT (sgot != NULL);
627 }
628
629 if (srelgot == NULL
630 && (h != NULL || info->shared))
631 {
632 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
633 if (srelgot == NULL)
634 {
635 srelgot = bfd_make_section_with_flags (dynobj,
636 ".rela.got",
637 (SEC_ALLOC
638 | SEC_LOAD
639 | SEC_HAS_CONTENTS
640 | SEC_IN_MEMORY
641 | SEC_LINKER_CREATED
642 | SEC_READONLY));
643 if (srelgot == NULL
644 || !bfd_set_section_alignment (dynobj, srelgot, 2))
645 return FALSE;
646 }
647 }
648
649 if (h != NULL)
650 {
651 struct elf_vax_link_hash_entry *eh;
652
653 eh = (struct elf_vax_link_hash_entry *) h;
654 if (h->got.refcount == -1)
655 {
656 h->got.refcount = 1;
657 eh->got_addend = rel->r_addend;
658 }
659 else
660 {
661 h->got.refcount++;
662 if (eh->got_addend != (bfd_vma) rel->r_addend)
663 (*_bfd_error_handler)
664 (_("%s: warning: GOT addend of %ld to `%s' does"
665 " not match previous GOT addend of %ld"),
666 bfd_get_filename (abfd), rel->r_addend,
667 h->root.root.string,
668 eh->got_addend);
669
670 }
671 }
672 break;
673
674 case R_VAX_PLT32:
675 /* This symbol requires a procedure linkage table entry. We
676 actually build the entry in adjust_dynamic_symbol,
677 because this might be a case of linking PIC code which is
678 never referenced by a dynamic object, in which case we
679 don't need to generate a procedure linkage table entry
680 after all. */
681
682 /* If this is a local symbol, we resolve it directly without
683 creating a procedure linkage table entry. */
684 BFD_ASSERT (h != NULL);
685 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT || h->forced_local)
686 break;
687
688 h->needs_plt = 1;
689 if (h->plt.refcount == -1)
690 h->plt.refcount = 1;
691 else
692 h->plt.refcount++;
693 break;
694
695 case R_VAX_PC8:
696 case R_VAX_PC16:
697 case R_VAX_PC32:
698 /* If we are creating a shared library and this is not a local
699 symbol, we need to copy the reloc into the shared library.
700 However when linking with -Bsymbolic and this is a global
701 symbol which is defined in an object we are including in the
702 link (i.e., DEF_REGULAR is set), then we can resolve the
703 reloc directly. At this point we have not seen all the input
704 files, so it is possible that DEF_REGULAR is not set now but
705 will be set later (it is never cleared). We account for that
706 possibility below by storing information in the
707 pcrel_relocs_copied field of the hash table entry. */
708 if (!(info->shared
709 && (sec->flags & SEC_ALLOC) != 0
710 && h != NULL
711 && (!info->symbolic
712 || !h->def_regular)))
713 {
714 if (h != NULL
715 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
716 && !h->forced_local)
717 {
718 /* Make sure a plt entry is created for this symbol if
719 it turns out to be a function defined by a dynamic
720 object. */
721 if (h->plt.refcount == -1)
722 h->plt.refcount = 1;
723 else
724 h->plt.refcount++;
725 }
726 break;
727 }
728 /* If this is a local symbol, we can resolve it directly. */
729 if (h != NULL
730 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
731 || h->forced_local))
732 break;
733
734 /* Fall through. */
735 case R_VAX_8:
736 case R_VAX_16:
737 case R_VAX_32:
738 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
739 {
740 /* Make sure a plt entry is created for this symbol if it
741 turns out to be a function defined by a dynamic object. */
742 if (h->plt.refcount == -1)
743 h->plt.refcount = 1;
744 else
745 h->plt.refcount++;
746 }
747
748 /* If we are creating a shared library, we need to copy the
749 reloc into the shared library. */
750 if (info->shared
751 && (sec->flags & SEC_ALLOC) != 0)
752 {
753 /* When creating a shared object, we must copy these
754 reloc types into the output file. We create a reloc
755 section in dynobj and make room for this reloc. */
756 if (sreloc == NULL)
757 {
758 sreloc = _bfd_elf_make_dynamic_reloc_section
759 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
760
761 if (sreloc == NULL)
762 return FALSE;
763
764 if (sec->flags & SEC_READONLY)
765 info->flags |= DF_TEXTREL;
766 }
767
768 sreloc->size += sizeof (Elf32_External_Rela);
769
770 /* If we are linking with -Bsymbolic, we count the number of
771 PC relative relocations we have entered for this symbol,
772 so that we can discard them again if the symbol is later
773 defined by a regular object. Note that this function is
774 only called if we are using a vaxelf linker hash table,
775 which means that h is really a pointer to an
776 elf_vax_link_hash_entry. */
777 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
778 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
779 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
780 && info->symbolic)
781 {
782 struct elf_vax_link_hash_entry *eh;
783 struct elf_vax_pcrel_relocs_copied *p;
784
785 eh = (struct elf_vax_link_hash_entry *) h;
786
787 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
788 if (p->section == sreloc)
789 break;
790
791 if (p == NULL)
792 {
793 p = ((struct elf_vax_pcrel_relocs_copied *)
794 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
795 if (p == NULL)
796 return FALSE;
797 p->next = eh->pcrel_relocs_copied;
798 eh->pcrel_relocs_copied = p;
799 p->section = sreloc;
800 p->count = 0;
801 }
802
803 ++p->count;
804 }
805 }
806
807 break;
808
809 /* This relocation describes the C++ object vtable hierarchy.
810 Reconstruct it for later use during GC. */
811 case R_VAX_GNU_VTINHERIT:
812 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
813 return FALSE;
814 break;
815
816 /* This relocation describes which C++ vtable entries are actually
817 used. Record for later use during GC. */
818 case R_VAX_GNU_VTENTRY:
819 BFD_ASSERT (h != NULL);
820 if (h != NULL
821 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
822 return FALSE;
823 break;
824
825 default:
826 break;
827 }
828 }
829
830 return TRUE;
831 }
832
833 /* Return the section that should be marked against GC for a given
834 relocation. */
835
836 static asection *
837 elf_vax_gc_mark_hook (asection *sec,
838 struct bfd_link_info *info,
839 Elf_Internal_Rela *rel,
840 struct elf_link_hash_entry *h,
841 Elf_Internal_Sym *sym)
842 {
843 if (h != NULL)
844 switch (ELF32_R_TYPE (rel->r_info))
845 {
846 case R_VAX_GNU_VTINHERIT:
847 case R_VAX_GNU_VTENTRY:
848 return NULL;
849 }
850
851 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
852 }
853
854 /* Update the got entry reference counts for the section being removed. */
855
856 static bfd_boolean
857 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
858 const Elf_Internal_Rela *relocs)
859 {
860 Elf_Internal_Shdr *symtab_hdr;
861 struct elf_link_hash_entry **sym_hashes;
862 const Elf_Internal_Rela *rel, *relend;
863 bfd *dynobj;
864
865 if (info->relocatable)
866 return TRUE;
867
868 dynobj = elf_hash_table (info)->dynobj;
869 if (dynobj == NULL)
870 return TRUE;
871
872 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
873 sym_hashes = elf_sym_hashes (abfd);
874
875 relend = relocs + sec->reloc_count;
876 for (rel = relocs; rel < relend; rel++)
877 {
878 unsigned long r_symndx;
879 struct elf_link_hash_entry *h = NULL;
880
881 r_symndx = ELF32_R_SYM (rel->r_info);
882 if (r_symndx >= symtab_hdr->sh_info)
883 {
884 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
885 while (h->root.type == bfd_link_hash_indirect
886 || h->root.type == bfd_link_hash_warning)
887 h = (struct elf_link_hash_entry *) h->root.u.i.link;
888 }
889
890 switch (ELF32_R_TYPE (rel->r_info))
891 {
892 case R_VAX_GOT32:
893 if (h != NULL && h->got.refcount > 0)
894 --h->got.refcount;
895 break;
896
897 case R_VAX_PLT32:
898 case R_VAX_PC8:
899 case R_VAX_PC16:
900 case R_VAX_PC32:
901 case R_VAX_8:
902 case R_VAX_16:
903 case R_VAX_32:
904 if (h != NULL && h->plt.refcount > 0)
905 --h->plt.refcount;
906 break;
907
908 default:
909 break;
910 }
911 }
912
913 return TRUE;
914 }
915
916 /* Adjust a symbol defined by a dynamic object and referenced by a
917 regular object. The current definition is in some section of the
918 dynamic object, but we're not including those sections. We have to
919 change the definition to something the rest of the link can
920 understand. */
921
922 static bfd_boolean
923 elf_vax_adjust_dynamic_symbol (info, h)
924 struct bfd_link_info *info;
925 struct elf_link_hash_entry *h;
926 {
927 bfd *dynobj;
928 asection *s;
929
930 dynobj = elf_hash_table (info)->dynobj;
931
932 /* Make sure we know what is going on here. */
933 BFD_ASSERT (dynobj != NULL
934 && (h->needs_plt
935 || h->u.weakdef != NULL
936 || (h->def_dynamic
937 && h->ref_regular
938 && !h->def_regular)));
939
940 /* If this is a function, put it in the procedure linkage table. We
941 will fill in the contents of the procedure linkage table later,
942 when we know the address of the .got section. */
943 if (h->type == STT_FUNC
944 || h->needs_plt)
945 {
946 if (! info->shared
947 && !h->def_dynamic
948 && !h->ref_dynamic
949 /* We must always create the plt entry if it was referenced
950 by a PLTxxO relocation. In this case we already recorded
951 it as a dynamic symbol. */
952 && h->dynindx == -1)
953 {
954 /* This case can occur if we saw a PLTxx reloc in an input
955 file, but the symbol was never referred to by a dynamic
956 object. In such a case, we don't actually need to build
957 a procedure linkage table, and we can just do a PCxx
958 reloc instead. */
959 BFD_ASSERT (h->needs_plt);
960 h->plt.offset = (bfd_vma) -1;
961 return TRUE;
962 }
963
964 /* GC may have rendered this entry unused. */
965 if (h->plt.refcount <= 0)
966 {
967 h->needs_plt = 0;
968 h->plt.offset = (bfd_vma) -1;
969 return TRUE;
970 }
971
972 /* Make sure this symbol is output as a dynamic symbol. */
973 if (h->dynindx == -1)
974 {
975 if (! bfd_elf_link_record_dynamic_symbol (info, h))
976 return FALSE;
977 }
978
979 s = bfd_get_section_by_name (dynobj, ".plt");
980 BFD_ASSERT (s != NULL);
981
982 /* If this is the first .plt entry, make room for the special
983 first entry. */
984 if (s->size == 0)
985 {
986 s->size += PLT_ENTRY_SIZE;
987 }
988
989 /* If this symbol is not defined in a regular file, and we are
990 not generating a shared library, then set the symbol to this
991 location in the .plt. This is required to make function
992 pointers compare as equal between the normal executable and
993 the shared library. */
994 if (!info->shared
995 && !h->def_regular)
996 {
997 h->root.u.def.section = s;
998 h->root.u.def.value = s->size;
999 }
1000
1001 h->plt.offset = s->size;
1002
1003 /* Make room for this entry. */
1004 s->size += PLT_ENTRY_SIZE;
1005
1006 /* We also need to make an entry in the .got.plt section, which
1007 will be placed in the .got section by the linker script. */
1008
1009 s = bfd_get_section_by_name (dynobj, ".got.plt");
1010 BFD_ASSERT (s != NULL);
1011 s->size += 4;
1012
1013 /* We also need to make an entry in the .rela.plt section. */
1014
1015 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1016 BFD_ASSERT (s != NULL);
1017 s->size += sizeof (Elf32_External_Rela);
1018
1019 return TRUE;
1020 }
1021
1022 /* Reinitialize the plt offset now that it is not used as a reference
1023 count any more. */
1024 h->plt.offset = (bfd_vma) -1;
1025
1026 /* If this is a weak symbol, and there is a real definition, the
1027 processor independent code will have arranged for us to see the
1028 real definition first, and we can just use the same value. */
1029 if (h->u.weakdef != NULL)
1030 {
1031 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1032 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1033 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1034 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1035 return TRUE;
1036 }
1037
1038 /* This is a reference to a symbol defined by a dynamic object which
1039 is not a function. */
1040
1041 /* If we are creating a shared library, we must presume that the
1042 only references to the symbol are via the global offset table.
1043 For such cases we need not do anything here; the relocations will
1044 be handled correctly by relocate_section. */
1045 if (info->shared)
1046 return TRUE;
1047
1048 if (h->size == 0)
1049 {
1050 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1051 h->root.root.string);
1052 return TRUE;
1053 }
1054
1055 /* We must allocate the symbol in our .dynbss section, which will
1056 become part of the .bss section of the executable. There will be
1057 an entry for this symbol in the .dynsym section. The dynamic
1058 object will contain position independent code, so all references
1059 from the dynamic object to this symbol will go through the global
1060 offset table. The dynamic linker will use the .dynsym entry to
1061 determine the address it must put in the global offset table, so
1062 both the dynamic object and the regular object will refer to the
1063 same memory location for the variable. */
1064
1065 s = bfd_get_section_by_name (dynobj, ".dynbss");
1066 BFD_ASSERT (s != NULL);
1067
1068 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1069 copy the initial value out of the dynamic object and into the
1070 runtime process image. We need to remember the offset into the
1071 .rela.bss section we are going to use. */
1072 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1073 {
1074 asection *srel;
1075
1076 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1077 BFD_ASSERT (srel != NULL);
1078 srel->size += sizeof (Elf32_External_Rela);
1079 h->needs_copy = 1;
1080 }
1081
1082 return _bfd_elf_adjust_dynamic_copy (h, s);
1083 }
1084
1085 /* Set the sizes of the dynamic sections. */
1086
1087 static bfd_boolean
1088 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1089 {
1090 bfd *dynobj;
1091 asection *s;
1092 bfd_boolean plt;
1093 bfd_boolean relocs;
1094 bfd_boolean reltext;
1095
1096 dynobj = elf_hash_table (info)->dynobj;
1097 BFD_ASSERT (dynobj != NULL);
1098
1099 if (elf_hash_table (info)->dynamic_sections_created)
1100 {
1101 /* Set the contents of the .interp section to the interpreter. */
1102 if (info->executable)
1103 {
1104 s = bfd_get_section_by_name (dynobj, ".interp");
1105 BFD_ASSERT (s != NULL);
1106 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1107 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1108 }
1109 }
1110 else
1111 {
1112 /* We may have created entries in the .rela.got and .got sections.
1113 However, if we are not creating the dynamic sections, we will
1114 not actually use these entries. Reset the size of .rela.got
1115 and .got, which will cause it to get stripped from the output
1116 file below. */
1117 s = bfd_get_section_by_name (dynobj, ".rela.got");
1118 if (s != NULL)
1119 s->size = 0;
1120 s = bfd_get_section_by_name (dynobj, ".got.plt");
1121 if (s != NULL)
1122 s->size = 0;
1123 s = bfd_get_section_by_name (dynobj, ".got");
1124 if (s != NULL)
1125 s->size = 0;
1126 }
1127
1128 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1129 relative relocs against symbols defined in a regular object. We
1130 allocated space for them in the check_relocs routine, but we will not
1131 fill them in in the relocate_section routine. */
1132 if (info->shared && info->symbolic)
1133 elf_vax_link_hash_traverse (elf_vax_hash_table (info),
1134 elf_vax_discard_copies,
1135 NULL);
1136
1137 /* If this is a -Bsymbolic shared link or a static link, we need to
1138 discard all the got entries we've recorded. Otherwise, we need to
1139 instantiate (allocate space for them). */
1140 elf_link_hash_traverse (elf_hash_table (info),
1141 elf_vax_instantiate_got_entries,
1142 (PTR) info);
1143
1144 /* The check_relocs and adjust_dynamic_symbol entry points have
1145 determined the sizes of the various dynamic sections. Allocate
1146 memory for them. */
1147 plt = FALSE;
1148 relocs = FALSE;
1149 reltext = FALSE;
1150 for (s = dynobj->sections; s != NULL; s = s->next)
1151 {
1152 const char *name;
1153
1154 if ((s->flags & SEC_LINKER_CREATED) == 0)
1155 continue;
1156
1157 /* It's OK to base decisions on the section name, because none
1158 of the dynobj section names depend upon the input files. */
1159 name = bfd_get_section_name (dynobj, s);
1160
1161 if (strcmp (name, ".plt") == 0)
1162 {
1163 /* Remember whether there is a PLT. */
1164 plt = s->size != 0;
1165 }
1166 else if (CONST_STRNEQ (name, ".rela"))
1167 {
1168 if (s->size != 0)
1169 {
1170 asection *target;
1171
1172 /* Remember whether there are any reloc sections other
1173 than .rela.plt. */
1174 if (strcmp (name, ".rela.plt") != 0)
1175 {
1176 const char *outname;
1177
1178 relocs = TRUE;
1179
1180 /* If this relocation section applies to a read only
1181 section, then we probably need a DT_TEXTREL
1182 entry. .rela.plt is actually associated with
1183 .got.plt, which is never readonly. */
1184 outname = bfd_get_section_name (output_bfd,
1185 s->output_section);
1186 target = bfd_get_section_by_name (output_bfd, outname + 5);
1187 if (target != NULL
1188 && (target->flags & SEC_READONLY) != 0
1189 && (target->flags & SEC_ALLOC) != 0)
1190 reltext = TRUE;
1191 }
1192
1193 /* We use the reloc_count field as a counter if we need
1194 to copy relocs into the output file. */
1195 s->reloc_count = 0;
1196 }
1197 }
1198 else if (! CONST_STRNEQ (name, ".got")
1199 && strcmp (name, ".dynbss") != 0)
1200 {
1201 /* It's not one of our sections, so don't allocate space. */
1202 continue;
1203 }
1204
1205 if (s->size == 0)
1206 {
1207 /* If we don't need this section, strip it from the
1208 output file. This is mostly to handle .rela.bss and
1209 .rela.plt. We must create both sections in
1210 create_dynamic_sections, because they must be created
1211 before the linker maps input sections to output
1212 sections. The linker does that before
1213 adjust_dynamic_symbol is called, and it is that
1214 function which decides whether anything needs to go
1215 into these sections. */
1216 s->flags |= SEC_EXCLUDE;
1217 continue;
1218 }
1219
1220 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1221 continue;
1222
1223 /* Allocate memory for the section contents. */
1224 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1225 if (s->contents == NULL)
1226 return FALSE;
1227 }
1228
1229 if (elf_hash_table (info)->dynamic_sections_created)
1230 {
1231 /* Add some entries to the .dynamic section. We fill in the
1232 values later, in elf_vax_finish_dynamic_sections, but we
1233 must add the entries now so that we get the correct size for
1234 the .dynamic section. The DT_DEBUG entry is filled in by the
1235 dynamic linker and used by the debugger. */
1236 #define add_dynamic_entry(TAG, VAL) \
1237 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1238
1239 if (!info->shared)
1240 {
1241 if (!add_dynamic_entry (DT_DEBUG, 0))
1242 return FALSE;
1243 }
1244
1245 if (plt)
1246 {
1247 if (!add_dynamic_entry (DT_PLTGOT, 0)
1248 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1249 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1250 || !add_dynamic_entry (DT_JMPREL, 0))
1251 return FALSE;
1252 }
1253
1254 if (relocs)
1255 {
1256 if (!add_dynamic_entry (DT_RELA, 0)
1257 || !add_dynamic_entry (DT_RELASZ, 0)
1258 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1259 return FALSE;
1260 }
1261
1262 if (reltext || (info->flags & DF_TEXTREL) != 0)
1263 {
1264 if (!add_dynamic_entry (DT_TEXTREL, 0))
1265 return FALSE;
1266 }
1267 }
1268 #undef add_dynamic_entry
1269
1270 return TRUE;
1271 }
1272
1273 /* This function is called via elf_vax_link_hash_traverse if we are
1274 creating a shared object with -Bsymbolic. It discards the space
1275 allocated to copy PC relative relocs against symbols which are defined
1276 in regular objects. We allocated space for them in the check_relocs
1277 routine, but we won't fill them in in the relocate_section routine. */
1278
1279 static bfd_boolean
1280 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1281 PTR ignore ATTRIBUTE_UNUSED)
1282 {
1283 struct elf_vax_pcrel_relocs_copied *s;
1284
1285 if (h->root.root.type == bfd_link_hash_warning)
1286 h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
1287
1288 /* We only discard relocs for symbols defined in a regular object. */
1289 if (!h->root.def_regular)
1290 return TRUE;
1291
1292 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1293 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1294
1295 return TRUE;
1296 }
1297
1298 /* This function is called via elf_link_hash_traverse. It looks for entries
1299 that have GOT or PLT (.GOT) references. If creating a static object or a
1300 shared object with -Bsymbolic, it resets the reference count back to 0
1301 and sets the offset to -1 so normal PC32 relocation will be done. If
1302 creating a shared object or executable, space in the .got and .rela.got
1303 will be reserved for the symbol. */
1304
1305 static bfd_boolean
1306 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, PTR infoptr)
1307 {
1308 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1309 bfd *dynobj;
1310 asection *sgot;
1311 asection *srelgot;
1312
1313 /* We don't care about non-GOT (and non-PLT) entries. */
1314 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1315 return TRUE;
1316
1317 dynobj = elf_hash_table (info)->dynobj;
1318 if (dynobj == NULL)
1319 return TRUE;
1320
1321 sgot = bfd_get_section_by_name (dynobj, ".got");
1322 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1323
1324 if (!elf_hash_table (info)->dynamic_sections_created
1325 || (info->shared && info->symbolic)
1326 || h->forced_local)
1327 {
1328 h->got.refcount = 0;
1329 h->got.offset = (bfd_vma) -1;
1330 h->plt.refcount = 0;
1331 h->plt.offset = (bfd_vma) -1;
1332 }
1333 else if (h->got.refcount > 0)
1334 {
1335 /* Make sure this symbol is output as a dynamic symbol. */
1336 if (h->dynindx == -1)
1337 {
1338 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1339 return FALSE;
1340 }
1341
1342 /* Allocate space in the .got and .rela.got sections. */
1343 sgot->size += 4;
1344 srelgot->size += sizeof (Elf32_External_Rela);
1345 }
1346
1347 return TRUE;
1348 }
1349
1350 /* Relocate an VAX ELF section. */
1351
1352 static bfd_boolean
1353 elf_vax_relocate_section (bfd *output_bfd,
1354 struct bfd_link_info *info,
1355 bfd *input_bfd,
1356 asection *input_section,
1357 bfd_byte *contents,
1358 Elf_Internal_Rela *relocs,
1359 Elf_Internal_Sym *local_syms,
1360 asection **local_sections)
1361 {
1362 bfd *dynobj;
1363 Elf_Internal_Shdr *symtab_hdr;
1364 struct elf_link_hash_entry **sym_hashes;
1365 bfd_vma *local_got_offsets;
1366 bfd_vma plt_index;
1367 bfd_vma got_offset;
1368 asection *sgot;
1369 asection *splt;
1370 asection *sgotplt;
1371 asection *sreloc;
1372 Elf_Internal_Rela *rel;
1373 Elf_Internal_Rela *relend;
1374
1375 dynobj = elf_hash_table (info)->dynobj;
1376 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1377 sym_hashes = elf_sym_hashes (input_bfd);
1378 local_got_offsets = elf_local_got_offsets (input_bfd);
1379
1380 sgot = NULL;
1381 splt = NULL;
1382 sgotplt = NULL;
1383 sreloc = NULL;
1384
1385 rel = relocs;
1386 relend = relocs + input_section->reloc_count;
1387 for (; rel < relend; rel++)
1388 {
1389 int r_type;
1390 reloc_howto_type *howto;
1391 unsigned long r_symndx;
1392 struct elf_link_hash_entry *h;
1393 Elf_Internal_Sym *sym;
1394 asection *sec;
1395 bfd_vma relocation;
1396 bfd_reloc_status_type r;
1397
1398 r_type = ELF32_R_TYPE (rel->r_info);
1399 if (r_type < 0 || r_type >= (int) R_VAX_max)
1400 {
1401 bfd_set_error (bfd_error_bad_value);
1402 return FALSE;
1403 }
1404 howto = howto_table + r_type;
1405
1406 r_symndx = ELF32_R_SYM (rel->r_info);
1407 h = NULL;
1408 sym = NULL;
1409 sec = NULL;
1410 if (r_symndx < symtab_hdr->sh_info)
1411 {
1412 sym = local_syms + r_symndx;
1413 sec = local_sections[r_symndx];
1414 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1415 }
1416 else
1417 {
1418 bfd_boolean unresolved_reloc;
1419 bfd_boolean warned;
1420
1421 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1422 r_symndx, symtab_hdr, sym_hashes,
1423 h, sec, relocation,
1424 unresolved_reloc, warned);
1425
1426 if ((h->root.type == bfd_link_hash_defined
1427 || h->root.type == bfd_link_hash_defweak)
1428 && ((r_type == R_VAX_PLT32
1429 && h->plt.offset != (bfd_vma) -1
1430 && !h->forced_local
1431 && elf_hash_table (info)->dynamic_sections_created)
1432 || (r_type == R_VAX_GOT32
1433 && h->got.offset != (bfd_vma) -1
1434 && !h->forced_local
1435 && elf_hash_table (info)->dynamic_sections_created
1436 && (! info->shared
1437 || (! info->symbolic && h->dynindx != -1)
1438 || !h->def_regular))
1439 || (info->shared
1440 && ((! info->symbolic && h->dynindx != -1)
1441 || !h->def_regular)
1442 && ((input_section->flags & SEC_ALLOC) != 0
1443 /* DWARF will emit R_VAX_32 relocations in its
1444 sections against symbols defined externally
1445 in shared libraries. We can't do anything
1446 with them here. */
1447
1448 || ((input_section->flags & SEC_DEBUGGING) != 0
1449 && h->def_dynamic))
1450 && (r_type == R_VAX_8
1451 || r_type == R_VAX_16
1452 || r_type == R_VAX_32))))
1453 /* In these cases, we don't need the relocation
1454 value. We check specially because in some
1455 obscure cases sec->output_section will be NULL. */
1456 relocation = 0;
1457 }
1458
1459 if (sec != NULL && elf_discarded_section (sec))
1460 {
1461 /* For relocs against symbols from removed linkonce sections,
1462 or sections discarded by a linker script, we just want the
1463 section contents zeroed. Avoid any special processing. */
1464 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1465 rel->r_info = 0;
1466 rel->r_addend = 0;
1467 continue;
1468 }
1469
1470 if (info->relocatable)
1471 continue;
1472
1473 switch (r_type)
1474 {
1475 case R_VAX_GOT32:
1476 /* Relocation is to the address of the entry for this symbol
1477 in the global offset table. */
1478 if (h == NULL
1479 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1480 || h->got.offset == (bfd_vma) -1
1481 || h->forced_local)
1482 break;
1483
1484 /* Relocation is the offset of the entry for this symbol in
1485 the global offset table. */
1486
1487 {
1488 bfd_vma off;
1489
1490 if (sgot == NULL)
1491 {
1492 sgot = bfd_get_section_by_name (dynobj, ".got");
1493 BFD_ASSERT (sgot != NULL);
1494 }
1495
1496 BFD_ASSERT (h != NULL);
1497 off = h->got.offset;
1498 BFD_ASSERT (off != (bfd_vma) -1);
1499 BFD_ASSERT (off < sgot->size);
1500
1501 if (info->shared
1502 && h->dynindx == -1
1503 && h->def_regular)
1504 {
1505 /* The symbol was forced to be local
1506 because of a version file.. We must initialize
1507 this entry in the global offset table. Since
1508 the offset must always be a multiple of 4, we
1509 use the least significant bit to record whether
1510 we have initialized it already.
1511
1512 When doing a dynamic link, we create a .rela.got
1513 relocation entry to initialize the value. This
1514 is done in the finish_dynamic_symbol routine. */
1515 if ((off & 1) != 0)
1516 off &= ~1;
1517 else
1518 {
1519 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1520 sgot->contents + off);
1521 h->got.offset |= 1;
1522 }
1523 } else {
1524 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1525 }
1526
1527 relocation = sgot->output_offset + off;
1528 /* The GOT relocation uses the addend. */
1529 rel->r_addend = 0;
1530
1531 /* Change the reference to be indirect. */
1532 contents[rel->r_offset - 1] |= 0x10;
1533 relocation += sgot->output_section->vma;
1534 }
1535 break;
1536
1537 case R_VAX_PLT32:
1538 /* Relocation is to the entry for this symbol in the
1539 procedure linkage table. */
1540
1541 /* Resolve a PLTxx reloc against a local symbol directly,
1542 without using the procedure linkage table. */
1543 if (h == NULL
1544 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1545 || h->forced_local)
1546 break;
1547
1548 if (h->plt.offset == (bfd_vma) -1
1549 || !elf_hash_table (info)->dynamic_sections_created)
1550 {
1551 /* We didn't make a PLT entry for this symbol. This
1552 happens when statically linking PIC code, or when
1553 using -Bsymbolic. */
1554 break;
1555 }
1556
1557 if (splt == NULL)
1558 {
1559 splt = bfd_get_section_by_name (dynobj, ".plt");
1560 BFD_ASSERT (splt != NULL);
1561 }
1562
1563 if (sgotplt == NULL)
1564 {
1565 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1566 BFD_ASSERT (splt != NULL);
1567 }
1568
1569 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1570
1571 /* Get the offset into the .got table of the entry that
1572 corresponds to this function. Each .got entry is 4 bytes.
1573 The first two are reserved. */
1574 got_offset = (plt_index + 3) * 4;
1575
1576 /* We want the relocate to point into the .got.plt instead
1577 of the plt itself. */
1578 relocation = (sgotplt->output_section->vma
1579 + sgotplt->output_offset
1580 + got_offset);
1581 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1582 if (rel->r_addend == 2)
1583 {
1584 h->plt.offset |= 1;
1585 }
1586 else if (rel->r_addend != 0)
1587 (*_bfd_error_handler)
1588 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1589 bfd_get_filename (input_bfd), rel->r_addend,
1590 h->root.root.string,
1591 bfd_get_section_name (input_bfd, input_section));
1592 rel->r_addend = 0;
1593
1594 break;
1595
1596 case R_VAX_PC8:
1597 case R_VAX_PC16:
1598 case R_VAX_PC32:
1599 if (h == NULL
1600 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1601 || h->forced_local)
1602 break;
1603 /* Fall through. */
1604 case R_VAX_8:
1605 case R_VAX_16:
1606 case R_VAX_32:
1607 if (info->shared
1608 && r_symndx != 0
1609 && (input_section->flags & SEC_ALLOC) != 0
1610 && ((r_type != R_VAX_PC8
1611 && r_type != R_VAX_PC16
1612 && r_type != R_VAX_PC32)
1613 || ((input_section->flags & SEC_CODE)
1614 && (!info->symbolic
1615 || (!h->def_regular && h->type != STT_SECTION)))))
1616 {
1617 Elf_Internal_Rela outrel;
1618 bfd_byte *loc;
1619 bfd_boolean skip, relocate;
1620
1621 /* When generating a shared object, these relocations
1622 are copied into the output file to be resolved at run
1623 time. */
1624 if (sreloc == NULL)
1625 {
1626 sreloc = _bfd_elf_get_dynamic_reloc_section
1627 (input_bfd, input_section, /*rela?*/ TRUE);
1628 if (sreloc == NULL)
1629 return FALSE;
1630 }
1631
1632 skip = FALSE;
1633 relocate = FALSE;
1634
1635 outrel.r_offset =
1636 _bfd_elf_section_offset (output_bfd, info, input_section,
1637 rel->r_offset);
1638 if (outrel.r_offset == (bfd_vma) -1)
1639 skip = TRUE;
1640 if (outrel.r_offset == (bfd_vma) -2)
1641 skip = TRUE, relocate = TRUE;
1642 outrel.r_offset += (input_section->output_section->vma
1643 + input_section->output_offset);
1644
1645 if (skip)
1646 memset (&outrel, 0, sizeof outrel);
1647 /* h->dynindx may be -1 if the symbol was marked to
1648 become local. */
1649 else if (h != NULL
1650 && ((! info->symbolic && h->dynindx != -1)
1651 || !h->def_regular))
1652 {
1653 BFD_ASSERT (h->dynindx != -1);
1654 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1655 outrel.r_addend = relocation + rel->r_addend;
1656 }
1657 else
1658 {
1659 if (r_type == R_VAX_32)
1660 {
1661 relocate = TRUE;
1662 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1663 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1664 &contents[rel->r_offset]) == 0);
1665 outrel.r_addend = relocation + rel->r_addend;
1666 }
1667 else
1668 {
1669 long indx;
1670
1671 if (bfd_is_abs_section (sec))
1672 indx = 0;
1673 else if (sec == NULL || sec->owner == NULL)
1674 {
1675 bfd_set_error (bfd_error_bad_value);
1676 return FALSE;
1677 }
1678 else
1679 {
1680 asection *osec;
1681
1682 /* We are turning this relocation into one
1683 against a section symbol. It would be
1684 proper to subtract the symbol's value,
1685 osec->vma, from the emitted reloc addend,
1686 but ld.so expects buggy relocs. */
1687 osec = sec->output_section;
1688 indx = elf_section_data (osec)->dynindx;
1689 if (indx == 0)
1690 {
1691 struct elf_link_hash_table *htab;
1692 htab = elf_hash_table (info);
1693 osec = htab->text_index_section;
1694 indx = elf_section_data (osec)->dynindx;
1695 }
1696 BFD_ASSERT (indx != 0);
1697 }
1698
1699 outrel.r_info = ELF32_R_INFO (indx, r_type);
1700 outrel.r_addend = relocation + rel->r_addend;
1701 }
1702 }
1703
1704 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1705 ".text") != 0 ||
1706 (info->shared
1707 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1708 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1709 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1710 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1711 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1712 {
1713 if (h != NULL)
1714 (*_bfd_error_handler)
1715 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1716 bfd_get_filename (input_bfd), howto->name,
1717 h->root.root.string,
1718 bfd_get_section_name (input_bfd, input_section));
1719 else
1720 (*_bfd_error_handler)
1721 (_("%s: warning: %s relocation to 0x%x from %s section"),
1722 bfd_get_filename (input_bfd), howto->name,
1723 outrel.r_addend,
1724 bfd_get_section_name (input_bfd, input_section));
1725 }
1726 loc = sreloc->contents;
1727 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1728 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1729
1730 /* This reloc will be computed at runtime, so there's no
1731 need to do anything now, except for R_VAX_32
1732 relocations that have been turned into
1733 R_VAX_RELATIVE. */
1734 if (!relocate)
1735 continue;
1736 }
1737
1738 break;
1739
1740 case R_VAX_GNU_VTINHERIT:
1741 case R_VAX_GNU_VTENTRY:
1742 /* These are no-ops in the end. */
1743 continue;
1744
1745 default:
1746 break;
1747 }
1748
1749 /* VAX PCREL relocations are from the end of relocation, not the start.
1750 So subtract the difference from the relocation amount since we can't
1751 add it to the offset. */
1752 if (howto->pc_relative && howto->pcrel_offset)
1753 relocation -= bfd_get_reloc_size(howto);
1754
1755 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1756 contents, rel->r_offset,
1757 relocation, rel->r_addend);
1758
1759 if (r != bfd_reloc_ok)
1760 {
1761 switch (r)
1762 {
1763 default:
1764 case bfd_reloc_outofrange:
1765 abort ();
1766 case bfd_reloc_overflow:
1767 {
1768 const char *name;
1769
1770 if (h != NULL)
1771 name = NULL;
1772 else
1773 {
1774 name = bfd_elf_string_from_elf_section (input_bfd,
1775 symtab_hdr->sh_link,
1776 sym->st_name);
1777 if (name == NULL)
1778 return FALSE;
1779 if (*name == '\0')
1780 name = bfd_section_name (input_bfd, sec);
1781 }
1782 if (!(info->callbacks->reloc_overflow
1783 (info, (h ? &h->root : NULL), name, howto->name,
1784 (bfd_vma) 0, input_bfd, input_section,
1785 rel->r_offset)))
1786 return FALSE;
1787 }
1788 break;
1789 }
1790 }
1791 }
1792
1793 return TRUE;
1794 }
1795
1796 /* Finish up dynamic symbol handling. We set the contents of various
1797 dynamic sections here. */
1798
1799 static bfd_boolean
1800 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1801 struct elf_link_hash_entry *h,
1802 Elf_Internal_Sym *sym)
1803 {
1804 bfd *dynobj;
1805
1806 dynobj = elf_hash_table (info)->dynobj;
1807
1808 if (h->plt.offset != (bfd_vma) -1)
1809 {
1810 asection *splt;
1811 asection *sgot;
1812 asection *srela;
1813 bfd_vma plt_index;
1814 bfd_vma got_offset;
1815 bfd_vma addend;
1816 Elf_Internal_Rela rela;
1817 bfd_byte *loc;
1818
1819 /* This symbol has an entry in the procedure linkage table. Set
1820 it up. */
1821 BFD_ASSERT (h->dynindx != -1);
1822
1823 splt = bfd_get_section_by_name (dynobj, ".plt");
1824 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1825 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1826 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1827
1828 addend = 2 * (h->plt.offset & 1);
1829 h->plt.offset &= ~1;
1830
1831 /* Get the index in the procedure linkage table which
1832 corresponds to this symbol. This is the index of this symbol
1833 in all the symbols for which we are making plt entries. The
1834 first entry in the procedure linkage table is reserved. */
1835 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1836
1837 /* Get the offset into the .got table of the entry that
1838 corresponds to this function. Each .got entry is 4 bytes.
1839 The first two are reserved. */
1840 got_offset = (plt_index + 3) * 4;
1841
1842 /* Fill in the entry in the procedure linkage table. */
1843 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1844 PLT_ENTRY_SIZE);
1845
1846 /* The offset is relative to the first extension word. */
1847 bfd_put_32 (output_bfd,
1848 -(h->plt.offset + 8),
1849 splt->contents + h->plt.offset + 4);
1850
1851 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1852 splt->contents + h->plt.offset + 8);
1853
1854 /* Fill in the entry in the global offset table. */
1855 bfd_put_32 (output_bfd,
1856 (splt->output_section->vma
1857 + splt->output_offset
1858 + h->plt.offset) + addend,
1859 sgot->contents + got_offset);
1860
1861 /* Fill in the entry in the .rela.plt section. */
1862 rela.r_offset = (sgot->output_section->vma
1863 + sgot->output_offset
1864 + got_offset);
1865 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1866 rela.r_addend = addend;
1867 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1868 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1869
1870 if (!h->def_regular)
1871 {
1872 /* Mark the symbol as undefined, rather than as defined in
1873 the .plt section. Leave the value alone. */
1874 sym->st_shndx = SHN_UNDEF;
1875 }
1876 }
1877
1878 if (h->got.offset != (bfd_vma) -1)
1879 {
1880 asection *sgot;
1881 asection *srela;
1882 Elf_Internal_Rela rela;
1883 bfd_byte *loc;
1884
1885 /* This symbol has an entry in the global offset table. Set it
1886 up. */
1887 sgot = bfd_get_section_by_name (dynobj, ".got");
1888 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1889 BFD_ASSERT (sgot != NULL && srela != NULL);
1890
1891 rela.r_offset = (sgot->output_section->vma
1892 + sgot->output_offset
1893 + (h->got.offset &~ 1));
1894
1895 /* If the symbol was forced to be local because of a version file
1896 locally we just want to emit a RELATIVE reloc. The entry in
1897 the global offset table will already have been initialized in
1898 the relocate_section function. */
1899 if (info->shared
1900 && h->dynindx == -1
1901 && h->def_regular)
1902 {
1903 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1904 }
1905 else
1906 {
1907 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1908 }
1909 rela.r_addend = bfd_get_signed_32 (output_bfd,
1910 (sgot->contents
1911 + (h->got.offset & ~1)));
1912
1913 loc = srela->contents;
1914 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1915 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1916 }
1917
1918 if (h->needs_copy)
1919 {
1920 asection *s;
1921 Elf_Internal_Rela rela;
1922 bfd_byte *loc;
1923
1924 /* This symbol needs a copy reloc. Set it up. */
1925 BFD_ASSERT (h->dynindx != -1
1926 && (h->root.type == bfd_link_hash_defined
1927 || h->root.type == bfd_link_hash_defweak));
1928
1929 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1930 ".rela.bss");
1931 BFD_ASSERT (s != NULL);
1932
1933 rela.r_offset = (h->root.u.def.value
1934 + h->root.u.def.section->output_section->vma
1935 + h->root.u.def.section->output_offset);
1936 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1937 rela.r_addend = 0;
1938 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1939 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1940 }
1941
1942 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1943 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1944 || h == elf_hash_table (info)->hgot)
1945 sym->st_shndx = SHN_ABS;
1946
1947 return TRUE;
1948 }
1949
1950 /* Finish up the dynamic sections. */
1951
1952 static bfd_boolean
1953 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1954 {
1955 bfd *dynobj;
1956 asection *sgot;
1957 asection *sdyn;
1958
1959 dynobj = elf_hash_table (info)->dynobj;
1960
1961 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1962 BFD_ASSERT (sgot != NULL);
1963 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1964
1965 if (elf_hash_table (info)->dynamic_sections_created)
1966 {
1967 asection *splt;
1968 Elf32_External_Dyn *dyncon, *dynconend;
1969
1970 splt = bfd_get_section_by_name (dynobj, ".plt");
1971 BFD_ASSERT (splt != NULL && sdyn != NULL);
1972
1973 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1974 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1975 for (; dyncon < dynconend; dyncon++)
1976 {
1977 Elf_Internal_Dyn dyn;
1978 const char *name;
1979 asection *s;
1980
1981 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1982
1983 switch (dyn.d_tag)
1984 {
1985 default:
1986 break;
1987
1988 case DT_PLTGOT:
1989 name = ".got";
1990 goto get_vma;
1991 case DT_JMPREL:
1992 name = ".rela.plt";
1993 get_vma:
1994 s = bfd_get_section_by_name (output_bfd, name);
1995 BFD_ASSERT (s != NULL);
1996 dyn.d_un.d_ptr = s->vma;
1997 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1998 break;
1999
2000 case DT_PLTRELSZ:
2001 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2002 BFD_ASSERT (s != NULL);
2003 dyn.d_un.d_val = s->size;
2004 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2005 break;
2006
2007 case DT_RELASZ:
2008 /* The procedure linkage table relocs (DT_JMPREL) should
2009 not be included in the overall relocs (DT_RELA).
2010 Therefore, we override the DT_RELASZ entry here to
2011 make it not include the JMPREL relocs. Since the
2012 linker script arranges for .rela.plt to follow all
2013 other relocation sections, we don't have to worry
2014 about changing the DT_RELA entry. */
2015 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2016 if (s != NULL)
2017 dyn.d_un.d_val -= s->size;
2018 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2019 break;
2020 }
2021 }
2022
2023 /* Fill in the first entry in the procedure linkage table. */
2024 if (splt->size > 0)
2025 {
2026 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2027 bfd_put_32 (output_bfd,
2028 (sgot->output_section->vma
2029 + sgot->output_offset + 4
2030 - (splt->output_section->vma + 6)),
2031 splt->contents + 2);
2032 bfd_put_32 (output_bfd,
2033 (sgot->output_section->vma
2034 + sgot->output_offset + 8
2035 - (splt->output_section->vma + 12)),
2036 splt->contents + 8);
2037 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2038 = PLT_ENTRY_SIZE;
2039 }
2040 }
2041
2042 /* Fill in the first three entries in the global offset table. */
2043 if (sgot->size > 0)
2044 {
2045 if (sdyn == NULL)
2046 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2047 else
2048 bfd_put_32 (output_bfd,
2049 sdyn->output_section->vma + sdyn->output_offset,
2050 sgot->contents);
2051 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2052 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2053 }
2054
2055 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2056
2057 return TRUE;
2058 }
2059
2060 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2061 #define TARGET_LITTLE_NAME "elf32-vax"
2062 #define ELF_MACHINE_CODE EM_VAX
2063 #define ELF_MAXPAGESIZE 0x1000
2064
2065 #define elf_backend_create_dynamic_sections \
2066 _bfd_elf_create_dynamic_sections
2067 #define bfd_elf32_bfd_link_hash_table_create \
2068 elf_vax_link_hash_table_create
2069 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2070
2071 #define elf_backend_check_relocs elf_vax_check_relocs
2072 #define elf_backend_adjust_dynamic_symbol \
2073 elf_vax_adjust_dynamic_symbol
2074 #define elf_backend_size_dynamic_sections \
2075 elf_vax_size_dynamic_sections
2076 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2077 #define elf_backend_relocate_section elf_vax_relocate_section
2078 #define elf_backend_finish_dynamic_symbol \
2079 elf_vax_finish_dynamic_symbol
2080 #define elf_backend_finish_dynamic_sections \
2081 elf_vax_finish_dynamic_sections
2082 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2083 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2084 #define bfd_elf32_bfd_merge_private_bfd_data \
2085 elf32_vax_merge_private_bfd_data
2086 #define bfd_elf32_bfd_set_private_flags \
2087 elf32_vax_set_private_flags
2088 #define bfd_elf32_bfd_print_private_bfd_data \
2089 elf32_vax_print_private_bfd_data
2090
2091 #define elf_backend_can_gc_sections 1
2092 #define elf_backend_want_got_plt 1
2093 #define elf_backend_plt_readonly 1
2094 #define elf_backend_want_plt_sym 0
2095 #define elf_backend_got_header_size 16
2096 #define elf_backend_rela_normal 1
2097
2098 #include "elf32-target.h"
GDB Binutils - Deliverables
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