source: trunk/binutils/bfd/elf32-vax.c@ 3830

Last change on this file since 3830 was 607, checked in by bird, 22 years ago

Initial revision
  • Property cvs2svn:cvs-rev set to 1.1
  • Property svn:eol-style set to native
  • Property svn:executable set to *
File size: 63.6 KB
Line 
1/* VAX series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
4 Contributed by Matt Thomas <matt@3am-software.com>.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21
22#include "bfd.h"
23#include "sysdep.h"
24#include "bfdlink.h"
25#include "libbfd.h"
26#include "elf-bfd.h"
27#include "elf/vax.h"
28
29static reloc_howto_type *reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31static void rtype_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33static struct bfd_hash_entry *elf_vax_link_hash_newfunc
34 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
35static struct bfd_link_hash_table *elf_vax_link_hash_table_create
36 PARAMS ((bfd *));
37static bfd_boolean elf_vax_check_relocs
38 PARAMS ((bfd *, struct bfd_link_info *, asection *,
39 const Elf_Internal_Rela *));
40static asection *elf_vax_gc_mark_hook
41 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
42 struct elf_link_hash_entry *, Elf_Internal_Sym *));
43static bfd_boolean elf_vax_gc_sweep_hook
44 PARAMS ((bfd *, struct bfd_link_info *, asection *,
45 const Elf_Internal_Rela *));
46static bfd_boolean elf_vax_adjust_dynamic_symbol
47 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
48static bfd_boolean elf_vax_size_dynamic_sections
49 PARAMS ((bfd *, struct bfd_link_info *));
50static bfd_boolean elf_vax_relocate_section
51 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
52 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
53static bfd_boolean elf_vax_finish_dynamic_symbol
54 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
55 Elf_Internal_Sym *));
56static bfd_boolean elf_vax_finish_dynamic_sections
57 PARAMS ((bfd *, struct bfd_link_info *));
58
59static bfd_boolean elf32_vax_set_private_flags
60 PARAMS ((bfd *, flagword));
61static bfd_boolean elf32_vax_merge_private_bfd_data
62 PARAMS ((bfd *, bfd *));
63static bfd_boolean elf32_vax_print_private_bfd_data
64 PARAMS ((bfd *, PTR));
65
66static reloc_howto_type howto_table[] = {
67 HOWTO (R_VAX_NONE, /* type */
68 0, /* rightshift */
69 0, /* size (0 = byte, 1 = short, 2 = long) */
70 0, /* bitsize */
71 FALSE, /* pc_relative */
72 0, /* bitpos */
73 complain_overflow_dont, /* complain_on_overflow */
74 bfd_elf_generic_reloc, /* special_function */
75 "R_VAX_NONE", /* name */
76 FALSE, /* partial_inplace */
77 0, /* src_mask */
78 0x00000000, /* dst_mask */
79 FALSE), /* pcrel_offset */
80
81 HOWTO (R_VAX_32, /* type */
82 0, /* rightshift */
83 2, /* size (0 = byte, 1 = short, 2 = long) */
84 32, /* bitsize */
85 FALSE, /* pc_relative */
86 0, /* bitpos */
87 complain_overflow_bitfield, /* complain_on_overflow */
88 bfd_elf_generic_reloc, /* special_function */
89 "R_VAX_32", /* name */
90 FALSE, /* partial_inplace */
91 0, /* src_mask */
92 0xffffffff, /* dst_mask */
93 FALSE), /* pcrel_offset */
94
95 HOWTO (R_VAX_16, /* type */
96 0, /* rightshift */
97 1, /* size (0 = byte, 1 = short, 2 = long) */
98 16, /* bitsize */
99 FALSE, /* pc_relative */
100 0, /* bitpos */
101 complain_overflow_bitfield, /* complain_on_overflow */
102 bfd_elf_generic_reloc, /* special_function */
103 "R_VAX_16", /* name */
104 FALSE, /* partial_inplace */
105 0, /* src_mask */
106 0x0000ffff, /* dst_mask */
107 FALSE), /* pcrel_offset */
108
109 HOWTO (R_VAX_8, /* type */
110 0, /* rightshift */
111 0, /* size (0 = byte, 1 = short, 2 = long) */
112 8, /* bitsize */
113 FALSE, /* pc_relative */
114 0, /* bitpos */
115 complain_overflow_bitfield, /* complain_on_overflow */
116 bfd_elf_generic_reloc, /* special_function */
117 "R_VAX_8", /* name */
118 FALSE, /* partial_inplace */
119 0, /* src_mask */
120 0x000000ff, /* dst_mask */
121 FALSE), /* pcrel_offset */
122
123 HOWTO (R_VAX_PC32, /* type */
124 0, /* rightshift */
125 2, /* size (0 = byte, 1 = short, 2 = long) */
126 32, /* bitsize */
127 TRUE, /* pc_relative */
128 0, /* bitpos */
129 complain_overflow_bitfield, /* complain_on_overflow */
130 bfd_elf_generic_reloc, /* special_function */
131 "R_VAX_PC32", /* name */
132 FALSE, /* partial_inplace */
133 0, /* src_mask */
134 0xffffffff, /* dst_mask */
135 TRUE), /* pcrel_offset */
136
137 HOWTO (R_VAX_PC16, /* type */
138 0, /* rightshift */
139 1, /* size (0 = byte, 1 = short, 2 = long) */
140 16, /* bitsize */
141 TRUE, /* pc_relative */
142 0, /* bitpos */
143 complain_overflow_signed, /* complain_on_overflow */
144 bfd_elf_generic_reloc, /* special_function */
145 "R_VAX_PC16", /* name */
146 FALSE, /* partial_inplace */
147 0, /* src_mask */
148 0x0000ffff, /* dst_mask */
149 TRUE), /* pcrel_offset */
150
151 HOWTO (R_VAX_PC8, /* type */
152 0, /* rightshift */
153 0, /* size (0 = byte, 1 = short, 2 = long) */
154 8, /* bitsize */
155 TRUE, /* pc_relative */
156 0, /* bitpos */
157 complain_overflow_signed, /* complain_on_overflow */
158 bfd_elf_generic_reloc, /* special_function */
159 "R_VAX_PC8", /* name */
160 FALSE, /* partial_inplace */
161 0, /* src_mask */
162 0x000000ff, /* dst_mask */
163 TRUE), /* pcrel_offset */
164
165 HOWTO (R_VAX_GOT32, /* type */
166 0, /* rightshift */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
168 32, /* bitsize */
169 TRUE, /* pc_relative */
170 0, /* bitpos */
171 complain_overflow_bitfield, /* complain_on_overflow */
172 bfd_elf_generic_reloc, /* special_function */
173 "R_VAX_GOT32", /* name */
174 FALSE, /* partial_inplace */
175 0, /* src_mask */
176 0xffffffff, /* dst_mask */
177 TRUE), /* pcrel_offset */
178
179 EMPTY_HOWTO (-1),
180 EMPTY_HOWTO (-1),
181 EMPTY_HOWTO (-1),
182 EMPTY_HOWTO (-1),
183 EMPTY_HOWTO (-1),
184
185 HOWTO (R_VAX_PLT32, /* type */
186 0, /* rightshift */
187 2, /* size (0 = byte, 1 = short, 2 = long) */
188 32, /* bitsize */
189 TRUE, /* pc_relative */
190 0, /* bitpos */
191 complain_overflow_bitfield, /* complain_on_overflow */
192 bfd_elf_generic_reloc, /* special_function */
193 "R_VAX_PLT32", /* name */
194 FALSE, /* partial_inplace */
195 0, /* src_mask */
196 0xffffffff, /* dst_mask */
197 TRUE), /* pcrel_offset */
198
199 EMPTY_HOWTO (-1),
200 EMPTY_HOWTO (-1),
201 EMPTY_HOWTO (-1),
202 EMPTY_HOWTO (-1),
203 EMPTY_HOWTO (-1),
204
205 HOWTO (R_VAX_COPY, /* type */
206 0, /* rightshift */
207 0, /* size (0 = byte, 1 = short, 2 = long) */
208 0, /* bitsize */
209 FALSE, /* pc_relative */
210 0, /* bitpos */
211 complain_overflow_dont, /* complain_on_overflow */
212 bfd_elf_generic_reloc, /* special_function */
213 "R_VAX_COPY", /* name */
214 FALSE, /* partial_inplace */
215 0, /* src_mask */
216 0xffffffff, /* dst_mask */
217 FALSE), /* pcrel_offset */
218
219 HOWTO (R_VAX_GLOB_DAT, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_dont, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_VAX_GLOB_DAT", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0xffffffff, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 HOWTO (R_VAX_JMP_SLOT, /* type */
234 0, /* rightshift */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
236 32, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_dont, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_VAX_JMP_SLOT", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0xffffffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 HOWTO (R_VAX_RELATIVE, /* type */
248 0, /* rightshift */
249 2, /* size (0 = byte, 1 = short, 2 = long) */
250 32, /* bitsize */
251 FALSE, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_dont, /* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_VAX_RELATIVE", /* name */
256 FALSE, /* partial_inplace */
257 0, /* src_mask */
258 0xffffffff, /* dst_mask */
259 FALSE), /* pcrel_offset */
260
261 /* GNU extension to record C++ vtable hierarchy */
262 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
263 0, /* rightshift */
264 2, /* size (0 = byte, 1 = short, 2 = long) */
265 0, /* bitsize */
266 FALSE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_dont, /* complain_on_overflow */
269 NULL, /* special_function */
270 "R_VAX_GNU_VTINHERIT", /* name */
271 FALSE, /* partial_inplace */
272 0, /* src_mask */
273 0, /* dst_mask */
274 FALSE), /* pcrel_offset */
275
276 /* GNU extension to record C++ vtable member usage */
277 HOWTO (R_VAX_GNU_VTENTRY, /* type */
278 0, /* rightshift */
279 2, /* size (0 = byte, 1 = short, 2 = long) */
280 0, /* bitsize */
281 FALSE, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_dont, /* complain_on_overflow */
284 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
285 "R_VAX_GNU_VTENTRY", /* name */
286 FALSE, /* partial_inplace */
287 0, /* src_mask */
288 0, /* dst_mask */
289 FALSE), /* pcrel_offset */
290};
291
292static void
293rtype_to_howto (abfd, cache_ptr, dst)
294 bfd *abfd ATTRIBUTE_UNUSED;
295 arelent *cache_ptr;
296 Elf_Internal_Rela *dst;
297{
298 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
299 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
300}
301
302#define elf_info_to_howto rtype_to_howto
303
304static const struct
305{
306 bfd_reloc_code_real_type bfd_val;
307 int elf_val;
308} reloc_map[] = {
309 { BFD_RELOC_NONE, R_VAX_NONE },
310 { BFD_RELOC_32, R_VAX_32 },
311 { BFD_RELOC_16, R_VAX_16 },
312 { BFD_RELOC_8, R_VAX_8 },
313 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
314 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
315 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
316 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
317 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
318 { BFD_RELOC_NONE, R_VAX_COPY },
319 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
320 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
321 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
322 { BFD_RELOC_CTOR, R_VAX_32 },
323 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
324 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
325};
326
327static reloc_howto_type *
328reloc_type_lookup (abfd, code)
329 bfd *abfd ATTRIBUTE_UNUSED;
330 bfd_reloc_code_real_type code;
331{
332 unsigned int i;
333 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
334 {
335 if (reloc_map[i].bfd_val == code)
336 return &howto_table[reloc_map[i].elf_val];
337 }
338 return 0;
339}
340
341#define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
342#define ELF_ARCH bfd_arch_vax
343/* end code generated by elf.el */
344
345
346/* Functions for the VAX ELF linker. */
347
348/* The name of the dynamic interpreter. This is put in the .interp
349 section. */
350
351#define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
352
353/* The size in bytes of an entry in the procedure linkage table. */
354
355#define PLT_ENTRY_SIZE 12
356
357/* The first entry in a procedure linkage table looks like this. See
358 the SVR4 ABI VAX supplement to see how this works. */
359
360static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
361{
362 0xdd, 0xef, /* pushl l^ */
363 0, 0, 0, 0, /* offset to .plt.got + 4 */
364 0x17, 0xff, /* jmp @L^(pc) */
365 0, 0, 0, 0, /* offset to .plt.got + 8 */
366};
367
368/* Subsequent entries in a procedure linkage table look like this. */
369
370static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
371{
372 0x40, 0x00, /* .word ^M<r6> */
373 0x16, 0xef, /* jsb L^(pc) */
374 0, 0, 0, 0, /* replaced with offset to start of .plt */
375 0, 0, 0, 0, /* index into .rela.plt */
376};
377
378/* The VAX linker needs to keep track of the number of relocs that it
379 decides to copy in check_relocs for each symbol. This is so that it
380 can discard PC relative relocs if it doesn't need them when linking
381 with -Bsymbolic. We store the information in a field extending the
382 regular ELF linker hash table. */
383
384/* This structure keeps track of the number of PC relative relocs we have
385 copied for a given symbol. */
386
387struct elf_vax_pcrel_relocs_copied
388{
389 /* Next section. */
390 struct elf_vax_pcrel_relocs_copied *next;
391 /* A section in dynobj. */
392 asection *section;
393 /* Number of relocs copied in this section. */
394 bfd_size_type count;
395};
396
397/* VAX ELF linker hash entry. */
398
399struct elf_vax_link_hash_entry
400{
401 struct elf_link_hash_entry root;
402
403 /* Number of PC relative relocs copied for this symbol. */
404 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
405
406 bfd_vma got_addend;
407};
408
409/* VAX ELF linker hash table. */
410
411struct elf_vax_link_hash_table
412{
413 struct elf_link_hash_table root;
414};
415
416/* Declare this now that the above structures are defined. */
417
418static bfd_boolean elf_vax_discard_copies
419 PARAMS ((struct elf_vax_link_hash_entry *, PTR));
420
421/* Declare this now that the above structures are defined. */
422
423static bfd_boolean elf_vax_instantiate_got_entries
424 PARAMS ((struct elf_link_hash_entry *, PTR));
425
426/* Traverse an VAX ELF linker hash table. */
427
428#define elf_vax_link_hash_traverse(table, func, info) \
429 (elf_link_hash_traverse \
430 (&(table)->root, \
431 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
432 (info)))
433
434/* Get the VAX ELF linker hash table from a link_info structure. */
435
436#define elf_vax_hash_table(p) \
437 ((struct elf_vax_link_hash_table *) (p)->hash)
438
439/* Create an entry in an VAX ELF linker hash table. */
440
441static struct bfd_hash_entry *
442elf_vax_link_hash_newfunc (entry, table, string)
443 struct bfd_hash_entry *entry;
444 struct bfd_hash_table *table;
445 const char *string;
446{
447 struct elf_vax_link_hash_entry *ret =
448 (struct elf_vax_link_hash_entry *) entry;
449
450 /* Allocate the structure if it has not already been allocated by a
451 subclass. */
452 if (ret == (struct elf_vax_link_hash_entry *) NULL)
453 ret = ((struct elf_vax_link_hash_entry *)
454 bfd_hash_allocate (table,
455 sizeof (struct elf_vax_link_hash_entry)));
456 if (ret == (struct elf_vax_link_hash_entry *) NULL)
457 return (struct bfd_hash_entry *) ret;
458
459 /* Call the allocation method of the superclass. */
460 ret = ((struct elf_vax_link_hash_entry *)
461 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
462 table, string));
463 if (ret != (struct elf_vax_link_hash_entry *) NULL)
464 {
465 ret->pcrel_relocs_copied = NULL;
466 }
467
468 return (struct bfd_hash_entry *) ret;
469}
470
471/* Create an VAX ELF linker hash table. */
472
473static struct bfd_link_hash_table *
474elf_vax_link_hash_table_create (abfd)
475 bfd *abfd;
476{
477 struct elf_vax_link_hash_table *ret;
478 bfd_size_type amt = sizeof (struct elf_vax_link_hash_table);
479
480 ret = (struct elf_vax_link_hash_table *) bfd_malloc (amt);
481 if (ret == (struct elf_vax_link_hash_table *) NULL)
482 return NULL;
483
484 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
485 elf_vax_link_hash_newfunc))
486 {
487 free (ret);
488 return NULL;
489 }
490
491 return &ret->root.root;
492}
493
494/* Keep vax-specific flags in the ELF header */
495static bfd_boolean
496elf32_vax_set_private_flags (abfd, flags)
497 bfd *abfd;
498 flagword flags;
499{
500 elf_elfheader (abfd)->e_flags = flags;
501 elf_flags_init (abfd) = TRUE;
502 return TRUE;
503}
504
505/* Merge backend specific data from an object file to the output
506 object file when linking. */
507static bfd_boolean
508elf32_vax_merge_private_bfd_data (ibfd, obfd)
509 bfd *ibfd;
510 bfd *obfd;
511{
512 flagword out_flags;
513 flagword in_flags;
514
515 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
516 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
517 return TRUE;
518
519 in_flags = elf_elfheader (ibfd)->e_flags;
520 out_flags = elf_elfheader (obfd)->e_flags;
521
522 if (!elf_flags_init (obfd))
523 {
524 elf_flags_init (obfd) = TRUE;
525 elf_elfheader (obfd)->e_flags = in_flags;
526 }
527
528 return TRUE;
529}
530
531/* Display the flags field */
532static bfd_boolean
533elf32_vax_print_private_bfd_data (abfd, ptr)
534 bfd *abfd;
535 PTR ptr;
536{
537 FILE *file = (FILE *) ptr;
538
539 BFD_ASSERT (abfd != NULL && ptr != NULL);
540
541 /* Print normal ELF private data. */
542 _bfd_elf_print_private_bfd_data (abfd, ptr);
543
544 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
545
546 /* xgettext:c-format */
547 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
548
549 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
550 fprintf (file, _(" [nonpic]"));
551
552 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
553 fprintf (file, _(" [d-float]"));
554
555 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
556 fprintf (file, _(" [g-float]"));
557
558 fputc ('\n', file);
559
560 return TRUE;
561}
562/* Look through the relocs for a section during the first phase, and
563 allocate space in the global offset table or procedure linkage
564 table. */
565
566static bfd_boolean
567elf_vax_check_relocs (abfd, info, sec, relocs)
568 bfd *abfd;
569 struct bfd_link_info *info;
570 asection *sec;
571 const Elf_Internal_Rela *relocs;
572{
573 bfd *dynobj;
574 Elf_Internal_Shdr *symtab_hdr;
575 struct elf_link_hash_entry **sym_hashes;
576 const Elf_Internal_Rela *rel;
577 const Elf_Internal_Rela *rel_end;
578 asection *sgot;
579 asection *srelgot;
580 asection *sreloc;
581
582 if (info->relocateable)
583 return TRUE;
584
585 dynobj = elf_hash_table (info)->dynobj;
586 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
587 sym_hashes = elf_sym_hashes (abfd);
588
589 sgot = NULL;
590 srelgot = NULL;
591 sreloc = NULL;
592
593 rel_end = relocs + sec->reloc_count;
594 for (rel = relocs; rel < rel_end; rel++)
595 {
596 unsigned long r_symndx;
597 struct elf_link_hash_entry *h;
598
599 r_symndx = ELF32_R_SYM (rel->r_info);
600
601 if (r_symndx < symtab_hdr->sh_info)
602 h = NULL;
603 else
604 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
605
606 switch (ELF32_R_TYPE (rel->r_info))
607 {
608 case R_VAX_GOT32:
609 if (h != NULL
610 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
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 (dynobj, ".rela.got");
636 if (srelgot == NULL
637 || !bfd_set_section_flags (dynobj, srelgot,
638 (SEC_ALLOC
639 | SEC_LOAD
640 | SEC_HAS_CONTENTS
641 | SEC_IN_MEMORY
642 | SEC_LINKER_CREATED
643 | SEC_READONLY))
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 not match previous GOT addend of %ld"),
665 bfd_get_filename (abfd), rel->r_addend,
666 h->root.root.string,
667 eh->got_addend);
668
669 }
670 }
671 break;
672
673 case R_VAX_PLT32:
674 /* This symbol requires a procedure linkage table entry. We
675 actually build the entry in adjust_dynamic_symbol,
676 because this might be a case of linking PIC code which is
677 never referenced by a dynamic object, in which case we
678 don't need to generate a procedure linkage table entry
679 after all. */
680
681 /* If this is a local symbol, we resolve it directly without
682 creating a procedure linkage table entry. */
683 if (h == NULL)
684 continue;
685
686 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
687 if (h->plt.refcount == -1)
688 h->plt.refcount = 1;
689 else
690 h->plt.refcount++;
691 break;
692
693 case R_VAX_PC8:
694 case R_VAX_PC16:
695 case R_VAX_PC32:
696 /* If we are creating a shared library and this is not a local
697 symbol, we need to copy the reloc into the shared library.
698 However when linking with -Bsymbolic and this is a global
699 symbol which is defined in an object we are including in the
700 link (i.e., DEF_REGULAR is set), then we can resolve the
701 reloc directly. At this point we have not seen all the input
702 files, so it is possible that DEF_REGULAR is not set now but
703 will be set later (it is never cleared). We account for that
704 possibility below by storing information in the
705 pcrel_relocs_copied field of the hash table entry. */
706 if (!(info->shared
707 && (sec->flags & SEC_ALLOC) != 0
708 && h != NULL
709 && (!info->symbolic
710 || (h->elf_link_hash_flags
711 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
712 {
713 if (h != NULL)
714 {
715 /* Make sure a plt entry is created for this symbol if
716 it turns out to be a function defined by a dynamic
717 object. */
718 if (h->plt.refcount == -1)
719 h->plt.refcount = 1;
720 else
721 h->plt.refcount++;
722 }
723 break;
724 }
725 /* Fall through. */
726 case R_VAX_8:
727 case R_VAX_16:
728 case R_VAX_32:
729 if (h != NULL)
730 {
731 /* Make sure a plt entry is created for this symbol if it
732 turns out to be a function defined by a dynamic object. */
733 if (h->plt.refcount == -1)
734 h->plt.refcount = 1;
735 else
736 h->plt.refcount++;
737 }
738
739 /* If we are creating a shared library, we need to copy the
740 reloc into the shared library. */
741 if (info->shared
742 && (sec->flags & SEC_ALLOC) != 0)
743 {
744 /* When creating a shared object, we must copy these
745 reloc types into the output file. We create a reloc
746 section in dynobj and make room for this reloc. */
747 if (sreloc == NULL)
748 {
749 const char *name;
750
751 name = (bfd_elf_string_from_elf_section
752 (abfd,
753 elf_elfheader (abfd)->e_shstrndx,
754 elf_section_data (sec)->rel_hdr.sh_name));
755 if (name == NULL)
756 return FALSE;
757
758 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
759 && strcmp (bfd_get_section_name (abfd, sec),
760 name + 5) == 0);
761
762 sreloc = bfd_get_section_by_name (dynobj, name);
763 if (sreloc == NULL)
764 {
765 sreloc = bfd_make_section (dynobj, name);
766 if (sreloc == NULL
767 || !bfd_set_section_flags (dynobj, sreloc,
768 (SEC_ALLOC
769 | SEC_LOAD
770 | SEC_HAS_CONTENTS
771 | SEC_IN_MEMORY
772 | SEC_LINKER_CREATED
773 | SEC_READONLY))
774 || !bfd_set_section_alignment (dynobj, sreloc, 2))
775 return FALSE;
776 }
777 if (sec->flags & SEC_READONLY)
778 info->flags |= DF_TEXTREL;
779 }
780
781 sreloc->_raw_size += sizeof (Elf32_External_Rela);
782
783 /* If we are linking with -Bsymbolic, we count the number of
784 PC relative relocations we have entered for this symbol,
785 so that we can discard them again if the symbol is later
786 defined by a regular object. Note that this function is
787 only called if we are using a vaxelf linker hash table,
788 which means that h is really a pointer to an
789 elf_vax_link_hash_entry. */
790 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
791 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
792 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
793 && info->symbolic)
794 {
795 struct elf_vax_link_hash_entry *eh;
796 struct elf_vax_pcrel_relocs_copied *p;
797
798 eh = (struct elf_vax_link_hash_entry *) h;
799
800 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
801 if (p->section == sreloc)
802 break;
803
804 if (p == NULL)
805 {
806 p = ((struct elf_vax_pcrel_relocs_copied *)
807 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
808 if (p == NULL)
809 return FALSE;
810 p->next = eh->pcrel_relocs_copied;
811 eh->pcrel_relocs_copied = p;
812 p->section = sreloc;
813 p->count = 0;
814 }
815
816 ++p->count;
817 }
818 }
819
820 break;
821
822 /* This relocation describes the C++ object vtable hierarchy.
823 Reconstruct it for later use during GC. */
824 case R_VAX_GNU_VTINHERIT:
825 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
826 return FALSE;
827 break;
828
829 /* This relocation describes which C++ vtable entries are actually
830 used. Record for later use during GC. */
831 case R_VAX_GNU_VTENTRY:
832 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
833 return FALSE;
834 break;
835
836 default:
837 break;
838 }
839 }
840
841 return TRUE;
842}
843
844/* Return the section that should be marked against GC for a given
845 relocation. */
846
847static asection *
848elf_vax_gc_mark_hook (sec, info, rel, h, sym)
849 asection *sec;
850 struct bfd_link_info *info ATTRIBUTE_UNUSED;
851 Elf_Internal_Rela *rel;
852 struct elf_link_hash_entry *h;
853 Elf_Internal_Sym *sym;
854{
855 if (h != NULL)
856 {
857 switch (ELF32_R_TYPE (rel->r_info))
858 {
859 case R_VAX_GNU_VTINHERIT:
860 case R_VAX_GNU_VTENTRY:
861 break;
862
863 default:
864 switch (h->root.type)
865 {
866 default:
867 break;
868
869 case bfd_link_hash_defined:
870 case bfd_link_hash_defweak:
871 return h->root.u.def.section;
872
873 case bfd_link_hash_common:
874 return h->root.u.c.p->section;
875 }
876 }
877 }
878 else
879 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
880
881 return NULL;
882}
883
884/* Update the got entry reference counts for the section being removed. */
885
886static bfd_boolean
887elf_vax_gc_sweep_hook (abfd, info, sec, relocs)
888 bfd *abfd;
889 struct bfd_link_info *info;
890 asection *sec;
891 const Elf_Internal_Rela *relocs;
892{
893 Elf_Internal_Shdr *symtab_hdr;
894 struct elf_link_hash_entry **sym_hashes;
895 const Elf_Internal_Rela *rel, *relend;
896 unsigned long r_symndx;
897 struct elf_link_hash_entry *h;
898 bfd *dynobj;
899
900 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
901 sym_hashes = elf_sym_hashes (abfd);
902
903 dynobj = elf_hash_table (info)->dynobj;
904 if (dynobj == NULL)
905 return TRUE;
906
907 relend = relocs + sec->reloc_count;
908 for (rel = relocs; rel < relend; rel++)
909 {
910 switch (ELF32_R_TYPE (rel->r_info))
911 {
912 case R_VAX_GOT32:
913 r_symndx = ELF32_R_SYM (rel->r_info);
914 if (r_symndx >= symtab_hdr->sh_info)
915 {
916 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
917 if (h->got.refcount > 0)
918 --h->got.refcount;
919 }
920 break;
921
922 case R_VAX_PLT32:
923 case R_VAX_PC8:
924 case R_VAX_PC16:
925 case R_VAX_PC32:
926 case R_VAX_8:
927 case R_VAX_16:
928 case R_VAX_32:
929 r_symndx = ELF32_R_SYM (rel->r_info);
930 if (r_symndx >= symtab_hdr->sh_info)
931 {
932 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
933 if (h->plt.refcount > 0)
934 --h->plt.refcount;
935 }
936 break;
937
938 default:
939 break;
940 }
941 }
942
943 return TRUE;
944}
945
946/* Adjust a symbol defined by a dynamic object and referenced by a
947 regular object. The current definition is in some section of the
948 dynamic object, but we're not including those sections. We have to
949 change the definition to something the rest of the link can
950 understand. */
951
952static bfd_boolean
953elf_vax_adjust_dynamic_symbol (info, h)
954 struct bfd_link_info *info;
955 struct elf_link_hash_entry *h;
956{
957 bfd *dynobj;
958 asection *s;
959 unsigned int power_of_two;
960
961 dynobj = elf_hash_table (info)->dynobj;
962
963 /* Make sure we know what is going on here. */
964 BFD_ASSERT (dynobj != NULL
965 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
966 || h->weakdef != NULL
967 || ((h->elf_link_hash_flags
968 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
969 && (h->elf_link_hash_flags
970 & ELF_LINK_HASH_REF_REGULAR) != 0
971 && (h->elf_link_hash_flags
972 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
973
974 /* If this is a function, put it in the procedure linkage table. We
975 will fill in the contents of the procedure linkage table later,
976 when we know the address of the .got section. */
977 if (h->type == STT_FUNC
978 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
979 {
980 if (! info->shared
981 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
982 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
983 /* We must always create the plt entry if it was referenced
984 by a PLTxxO relocation. In this case we already recorded
985 it as a dynamic symbol. */
986 && h->dynindx == -1)
987 {
988 /* This case can occur if we saw a PLTxx reloc in an input
989 file, but the symbol was never referred to by a dynamic
990 object. In such a case, we don't actually need to build
991 a procedure linkage table, and we can just do a PCxx
992 reloc instead. */
993 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
994 h->plt.offset = (bfd_vma) -1;
995 return TRUE;
996 }
997
998 /* GC may have rendered this entry unused. */
999 if (h->plt.refcount <= 0)
1000 {
1001 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1002 h->plt.offset = (bfd_vma) -1;
1003 return TRUE;
1004 }
1005
1006 /* Make sure this symbol is output as a dynamic symbol. */
1007 if (h->dynindx == -1)
1008 {
1009 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1010 return FALSE;
1011 }
1012
1013 s = bfd_get_section_by_name (dynobj, ".plt");
1014 BFD_ASSERT (s != NULL);
1015
1016 /* If this is the first .plt entry, make room for the special
1017 first entry. */
1018 if (s->_raw_size == 0)
1019 {
1020 s->_raw_size += PLT_ENTRY_SIZE;
1021 }
1022
1023 /* If this symbol is not defined in a regular file, and we are
1024 not generating a shared library, then set the symbol to this
1025 location in the .plt. This is required to make function
1026 pointers compare as equal between the normal executable and
1027 the shared library. */
1028 if (!info->shared
1029 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1030 {
1031 h->root.u.def.section = s;
1032 h->root.u.def.value = s->_raw_size;
1033 }
1034
1035 h->plt.offset = s->_raw_size;
1036
1037 /* Make room for this entry. */
1038 s->_raw_size += PLT_ENTRY_SIZE;
1039
1040 /* We also need to make an entry in the .got.plt section, which
1041 will be placed in the .got section by the linker script. */
1042
1043 s = bfd_get_section_by_name (dynobj, ".got.plt");
1044 BFD_ASSERT (s != NULL);
1045 s->_raw_size += 4;
1046
1047 /* We also need to make an entry in the .rela.plt section. */
1048
1049 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1050 BFD_ASSERT (s != NULL);
1051 s->_raw_size += sizeof (Elf32_External_Rela);
1052
1053 return TRUE;
1054 }
1055
1056 /* Reinitialize the plt offset now that it is not used as a reference
1057 count any more. */
1058 h->plt.offset = (bfd_vma) -1;
1059
1060 /* If this is a weak symbol, and there is a real definition, the
1061 processor independent code will have arranged for us to see the
1062 real definition first, and we can just use the same value. */
1063 if (h->weakdef != NULL)
1064 {
1065 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1066 || h->weakdef->root.type == bfd_link_hash_defweak);
1067 h->root.u.def.section = h->weakdef->root.u.def.section;
1068 h->root.u.def.value = h->weakdef->root.u.def.value;
1069 return TRUE;
1070 }
1071
1072 /* This is a reference to a symbol defined by a dynamic object which
1073 is not a function. */
1074
1075 /* If we are creating a shared library, we must presume that the
1076 only references to the symbol are via the global offset table.
1077 For such cases we need not do anything here; the relocations will
1078 be handled correctly by relocate_section. */
1079 if (info->shared)
1080 return TRUE;
1081
1082 /* We must allocate the symbol in our .dynbss section, which will
1083 become part of the .bss section of the executable. There will be
1084 an entry for this symbol in the .dynsym section. The dynamic
1085 object will contain position independent code, so all references
1086 from the dynamic object to this symbol will go through the global
1087 offset table. The dynamic linker will use the .dynsym entry to
1088 determine the address it must put in the global offset table, so
1089 both the dynamic object and the regular object will refer to the
1090 same memory location for the variable. */
1091
1092 s = bfd_get_section_by_name (dynobj, ".dynbss");
1093 BFD_ASSERT (s != NULL);
1094
1095 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1096 copy the initial value out of the dynamic object and into the
1097 runtime process image. We need to remember the offset into the
1098 .rela.bss section we are going to use. */
1099 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1100 {
1101 asection *srel;
1102
1103 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1104 BFD_ASSERT (srel != NULL);
1105 srel->_raw_size += sizeof (Elf32_External_Rela);
1106 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1107 }
1108
1109 /* We need to figure out the alignment required for this symbol. I
1110 have no idea how ELF linkers handle this. */
1111 power_of_two = bfd_log2 (h->size);
1112 if (power_of_two > 3)
1113 power_of_two = 3;
1114
1115 /* Apply the required alignment. */
1116 s->_raw_size = BFD_ALIGN (s->_raw_size,
1117 (bfd_size_type) (1 << power_of_two));
1118 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1119 {
1120 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
1121 return FALSE;
1122 }
1123
1124 /* Define the symbol as being at this point in the section. */
1125 h->root.u.def.section = s;
1126 h->root.u.def.value = s->_raw_size;
1127
1128 /* Increment the section size to make room for the symbol. */
1129 s->_raw_size += h->size;
1130
1131 return TRUE;
1132}
1133
1134/* Set the sizes of the dynamic sections. */
1135
1136static bfd_boolean
1137elf_vax_size_dynamic_sections (output_bfd, info)
1138 bfd *output_bfd;
1139 struct bfd_link_info *info;
1140{
1141 bfd *dynobj;
1142 asection *s;
1143 bfd_boolean plt;
1144 bfd_boolean relocs;
1145 bfd_boolean reltext;
1146
1147 dynobj = elf_hash_table (info)->dynobj;
1148 BFD_ASSERT (dynobj != NULL);
1149
1150 if (elf_hash_table (info)->dynamic_sections_created)
1151 {
1152 /* Set the contents of the .interp section to the interpreter. */
1153 if (!info->shared)
1154 {
1155 s = bfd_get_section_by_name (dynobj, ".interp");
1156 BFD_ASSERT (s != NULL);
1157 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1158 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1159 }
1160 }
1161 else
1162 {
1163 /* We may have created entries in the .rela.got and .got sections.
1164 However, if we are not creating the dynamic sections, we will
1165 not actually use these entries. Reset the size of .rela.got
1166 and .got, which will cause it to get stripped from the output
1167 file below. */
1168 s = bfd_get_section_by_name (dynobj, ".rela.got");
1169 if (s != NULL)
1170 s->_raw_size = 0;
1171 s = bfd_get_section_by_name (dynobj, ".got.plt");
1172 if (s != NULL)
1173 s->_raw_size = 0;
1174 s = bfd_get_section_by_name (dynobj, ".got");
1175 if (s != NULL)
1176 s->_raw_size = 0;
1177 }
1178
1179 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1180 relative relocs against symbols defined in a regular object. We
1181 allocated space for them in the check_relocs routine, but we will not
1182 fill them in in the relocate_section routine. */
1183 if (info->shared && info->symbolic)
1184 elf_vax_link_hash_traverse (elf_vax_hash_table (info),
1185 elf_vax_discard_copies,
1186 (PTR) NULL);
1187
1188 /* If this is a -Bsymbolic shared link or a static link, we need to
1189 discard all the got entries we've recorded. Otherwise, we need to
1190 instantiate (allocate space for them). */
1191 elf_link_hash_traverse (elf_hash_table (info),
1192 elf_vax_instantiate_got_entries,
1193 (PTR) info);
1194
1195 /* The check_relocs and adjust_dynamic_symbol entry points have
1196 determined the sizes of the various dynamic sections. Allocate
1197 memory for them. */
1198 plt = FALSE;
1199 relocs = FALSE;
1200 reltext = FALSE;
1201 for (s = dynobj->sections; s != NULL; s = s->next)
1202 {
1203 const char *name;
1204 bfd_boolean strip;
1205
1206 if ((s->flags & SEC_LINKER_CREATED) == 0)
1207 continue;
1208
1209 /* It's OK to base decisions on the section name, because none
1210 of the dynobj section names depend upon the input files. */
1211 name = bfd_get_section_name (dynobj, s);
1212
1213 strip = FALSE;
1214
1215 if (strcmp (name, ".plt") == 0)
1216 {
1217 if (s->_raw_size == 0)
1218 {
1219 /* Strip this section if we don't need it; see the
1220 comment below. */
1221 strip = TRUE;
1222 }
1223 else
1224 {
1225 /* Remember whether there is a PLT. */
1226 plt = TRUE;
1227 }
1228 }
1229 else if (strncmp (name, ".rela", 5) == 0)
1230 {
1231 if (s->_raw_size == 0)
1232 {
1233 /* If we don't need this section, strip it from the
1234 output file. This is mostly to handle .rela.bss and
1235 .rela.plt. We must create both sections in
1236 create_dynamic_sections, because they must be created
1237 before the linker maps input sections to output
1238 sections. The linker does that before
1239 adjust_dynamic_symbol is called, and it is that
1240 function which decides whether anything needs to go
1241 into these sections. */
1242 strip = TRUE;
1243 }
1244 else
1245 {
1246 asection *target;
1247
1248 /* Remember whether there are any reloc sections other
1249 than .rela.plt. */
1250 if (strcmp (name, ".rela.plt") != 0)
1251 {
1252 const char *outname;
1253
1254 relocs = TRUE;
1255
1256 /* If this relocation section applies to a read only
1257 section, then we probably need a DT_TEXTREL
1258 entry. .rela.plt is actually associated with
1259 .got.plt, which is never readonly. */
1260 outname = bfd_get_section_name (output_bfd,
1261 s->output_section);
1262 target = bfd_get_section_by_name (output_bfd, outname + 5);
1263 if (target != NULL
1264 && (target->flags & SEC_READONLY) != 0
1265 && (target->flags & SEC_ALLOC) != 0)
1266 reltext = TRUE;
1267 }
1268
1269 /* We use the reloc_count field as a counter if we need
1270 to copy relocs into the output file. */
1271 s->reloc_count = 0;
1272 }
1273 }
1274 else if (strncmp (name, ".got", 4) != 0)
1275 {
1276 /* It's not one of our sections, so don't allocate space. */
1277 continue;
1278 }
1279
1280 if (strip)
1281 {
1282 _bfd_strip_section_from_output (info, s);
1283 continue;
1284 }
1285
1286 /* Allocate memory for the section contents. */
1287 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
1288 if (s->contents == NULL && s->_raw_size != 0)
1289 return FALSE;
1290 }
1291
1292 if (elf_hash_table (info)->dynamic_sections_created)
1293 {
1294 /* Add some entries to the .dynamic section. We fill in the
1295 values later, in elf_vax_finish_dynamic_sections, but we
1296 must add the entries now so that we get the correct size for
1297 the .dynamic section. The DT_DEBUG entry is filled in by the
1298 dynamic linker and used by the debugger. */
1299#define add_dynamic_entry(TAG, VAL) \
1300 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1301
1302 if (!info->shared)
1303 {
1304 if (!add_dynamic_entry (DT_DEBUG, 0))
1305 return FALSE;
1306 }
1307
1308 if (plt)
1309 {
1310 if (!add_dynamic_entry (DT_PLTGOT, 0)
1311 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1312 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1313 || !add_dynamic_entry (DT_JMPREL, 0))
1314 return FALSE;
1315 }
1316
1317 if (relocs)
1318 {
1319 if (!add_dynamic_entry (DT_RELA, 0)
1320 || !add_dynamic_entry (DT_RELASZ, 0)
1321 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1322 return FALSE;
1323 }
1324
1325 if (reltext || (info->flags & DF_TEXTREL) != 0)
1326 {
1327 if (!add_dynamic_entry (DT_TEXTREL, 0))
1328 return FALSE;
1329 }
1330 }
1331#undef add_dynamic_entry
1332
1333 return TRUE;
1334}
1335
1336/* This function is called via elf_vax_link_hash_traverse if we are
1337 creating a shared object with -Bsymbolic. It discards the space
1338 allocated to copy PC relative relocs against symbols which are defined
1339 in regular objects. We allocated space for them in the check_relocs
1340 routine, but we won't fill them in in the relocate_section routine. */
1341
1342/*ARGSUSED*/
1343static bfd_boolean
1344elf_vax_discard_copies (h, ignore)
1345 struct elf_vax_link_hash_entry *h;
1346 PTR ignore ATTRIBUTE_UNUSED;
1347{
1348 struct elf_vax_pcrel_relocs_copied *s;
1349
1350 if (h->root.root.type == bfd_link_hash_warning)
1351 h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
1352
1353 /* We only discard relocs for symbols defined in a regular object. */
1354 if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1355 return TRUE;
1356
1357 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1358 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela);
1359
1360 return TRUE;
1361}
1362
1363/* This function is called via elf_link_hash_traverse. It looks for entries
1364 that have GOT or PLT (.GOT) references. If creating a static object or a
1365 shared object with -Bsymbolic, it resets the reference count back to 0
1366 and sets the offset to -1 so normal PC32 relocation will be done. If
1367 creating a shared object or executable, space in the .got and .rela.got
1368 will be reserved for the symbol. */
1369
1370/*ARGSUSED*/
1371static bfd_boolean
1372elf_vax_instantiate_got_entries (h, infoptr)
1373 struct elf_link_hash_entry *h;
1374 PTR infoptr;
1375{
1376 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1377 bfd *dynobj;
1378 asection *sgot;
1379 asection *srelgot;
1380
1381 /* We don't care about non-GOT (and non-PLT) entries. */
1382 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1383 return TRUE;
1384
1385 dynobj = elf_hash_table (info)->dynobj;
1386 if (dynobj == NULL)
1387 return TRUE;
1388
1389 sgot = bfd_get_section_by_name (dynobj, ".got");
1390 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1391
1392 if (!elf_hash_table (info)->dynamic_sections_created
1393 || (info->shared && info->symbolic))
1394 {
1395 h->got.refcount = 0;
1396 h->got.offset = (bfd_vma) -1;
1397 h->plt.refcount = 0;
1398 h->plt.offset = (bfd_vma) -1;
1399 }
1400 else if (h->got.refcount > 0)
1401 {
1402 /* Make sure this symbol is output as a dynamic symbol. */
1403 if (h->dynindx == -1)
1404 {
1405 if (!bfd_elf32_link_record_dynamic_symbol (info, h))
1406 return FALSE;
1407 }
1408
1409 /* Allocate space in the .got and .rela.got sections. */
1410 sgot->_raw_size += 4;
1411 srelgot->_raw_size += sizeof (Elf32_External_Rela);
1412 }
1413
1414 return TRUE;
1415}
1416
1417/* Relocate an VAX ELF section. */
1418
1419static bfd_boolean
1420elf_vax_relocate_section (output_bfd, info, input_bfd, input_section,
1421 contents, relocs, local_syms, local_sections)
1422 bfd *output_bfd;
1423 struct bfd_link_info *info;
1424 bfd *input_bfd;
1425 asection *input_section;
1426 bfd_byte *contents;
1427 Elf_Internal_Rela *relocs;
1428 Elf_Internal_Sym *local_syms;
1429 asection **local_sections;
1430{
1431 bfd *dynobj;
1432 Elf_Internal_Shdr *symtab_hdr;
1433 struct elf_link_hash_entry **sym_hashes;
1434 bfd_vma *local_got_offsets;
1435 bfd_vma plt_index;
1436 bfd_vma got_offset;
1437 asection *sgot;
1438 asection *splt;
1439 asection *sgotplt;
1440 asection *sreloc;
1441 Elf_Internal_Rela *rel;
1442 Elf_Internal_Rela *relend;
1443
1444 if (info->relocateable)
1445 return TRUE;
1446
1447 dynobj = elf_hash_table (info)->dynobj;
1448 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1449 sym_hashes = elf_sym_hashes (input_bfd);
1450 local_got_offsets = elf_local_got_offsets (input_bfd);
1451
1452 sgot = NULL;
1453 splt = NULL;
1454 sgotplt = NULL;
1455 sreloc = NULL;
1456
1457 rel = relocs;
1458 relend = relocs + input_section->reloc_count;
1459 for (; rel < relend; rel++)
1460 {
1461 int r_type;
1462 reloc_howto_type *howto;
1463 unsigned long r_symndx;
1464 struct elf_link_hash_entry *h;
1465 Elf_Internal_Sym *sym;
1466 asection *sec;
1467 bfd_vma relocation;
1468 bfd_reloc_status_type r;
1469
1470 r_type = ELF32_R_TYPE (rel->r_info);
1471 if (r_type < 0 || r_type >= (int) R_VAX_max)
1472 {
1473 bfd_set_error (bfd_error_bad_value);
1474 return FALSE;
1475 }
1476 howto = howto_table + r_type;
1477
1478 /* This is a final link. */
1479 r_symndx = ELF32_R_SYM (rel->r_info);
1480 h = NULL;
1481 sym = NULL;
1482 sec = NULL;
1483 if (r_symndx < symtab_hdr->sh_info)
1484 {
1485 sym = local_syms + r_symndx;
1486 sec = local_sections[r_symndx];
1487 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
1488 }
1489 else
1490 {
1491 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1492 while (h->root.type == bfd_link_hash_indirect
1493 || h->root.type == bfd_link_hash_warning)
1494 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1495 if (h->root.type == bfd_link_hash_defined
1496 || h->root.type == bfd_link_hash_defweak)
1497 {
1498 sec = h->root.u.def.section;
1499 if ((r_type == R_VAX_PLT32
1500 && h->plt.offset != (bfd_vma) -1
1501 && elf_hash_table (info)->dynamic_sections_created)
1502 || (r_type == R_VAX_GOT32
1503 && strcmp (h->root.root.string,
1504 "_GLOBAL_OFFSET_TABLE_") != 0
1505 && elf_hash_table (info)->dynamic_sections_created
1506 && (! info->shared
1507 || (! info->symbolic && h->dynindx != -1)
1508 || (h->elf_link_hash_flags
1509 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1510 || (info->shared
1511 && ((! info->symbolic && h->dynindx != -1)
1512 || (h->elf_link_hash_flags
1513 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1514 && ((input_section->flags & SEC_ALLOC) != 0
1515 /* DWARF will emit R_VAX_32 relocations in its
1516 sections against symbols defined externally
1517 in shared libraries. We can't do anything
1518 with them here. */
1519
1520 || ((input_section->flags & SEC_DEBUGGING) != 0
1521 && (h->elf_link_hash_flags
1522 & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
1523 && (r_type == R_VAX_8
1524 || r_type == R_VAX_16
1525 || r_type == R_VAX_32
1526 || r_type == R_VAX_PC8
1527 || r_type == R_VAX_PC16
1528 || r_type == R_VAX_PC32)))
1529 {
1530 /* In these cases, we don't need the relocation
1531 value. We check specially because in some
1532 obscure cases sec->output_section will be NULL. */
1533 relocation = 0;
1534 }
1535 else
1536 relocation = (h->root.u.def.value
1537 + sec->output_section->vma
1538 + sec->output_offset);
1539 }
1540 else if (h->root.type == bfd_link_hash_undefweak)
1541 relocation = 0;
1542 else if (info->shared
1543 && !info->no_undefined
1544 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
1545 relocation = 0;
1546 else
1547 {
1548 if (!(info->callbacks->undefined_symbol
1549 (info, h->root.root.string, input_bfd,
1550 input_section, rel->r_offset,
1551 (!info->shared || info->no_undefined
1552 || ELF_ST_VISIBILITY (h->other)))))
1553 return FALSE;
1554 relocation = 0;
1555 }
1556 }
1557
1558 switch (r_type)
1559 {
1560 case R_VAX_GOT32:
1561 /* Relocation is to the address of the entry for this symbol
1562 in the global offset table. */
1563 if (h == NULL || h->got.offset == (bfd_vma) -1)
1564 break;
1565
1566 /* Relocation is the offset of the entry for this symbol in
1567 the global offset table. */
1568
1569 {
1570 bfd_vma off;
1571
1572 if (sgot == NULL)
1573 {
1574 sgot = bfd_get_section_by_name (dynobj, ".got");
1575 BFD_ASSERT (sgot != NULL);
1576 }
1577
1578 BFD_ASSERT (h != NULL);
1579 off = h->got.offset;
1580 BFD_ASSERT (off != (bfd_vma) -1);
1581 BFD_ASSERT (off < sgot->_raw_size);
1582
1583 if (info->shared
1584 && h->dynindx == -1
1585 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
1586 {
1587 /* The symbol was forced to be local
1588 because of a version file.. We must initialize
1589 this entry in the global offset table. Since
1590 the offset must always be a multiple of 4, we
1591 use the least significant bit to record whether
1592 we have initialized it already.
1593
1594 When doing a dynamic link, we create a .rela.got
1595 relocation entry to initialize the value. This
1596 is done in the finish_dynamic_symbol routine. */
1597 if ((off & 1) != 0)
1598 off &= ~1;
1599 else
1600 {
1601 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1602 sgot->contents + off);
1603 h->got.offset |= 1;
1604 }
1605 } else {
1606 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1607 }
1608
1609 relocation = sgot->output_offset + off;
1610 /* The GOT relocation uses the addend. */
1611 rel->r_addend = 0;
1612
1613 /* Change the reference to be indirect. */
1614 contents[rel->r_offset - 1] |= 0x10;
1615 relocation += sgot->output_section->vma;
1616 }
1617 break;
1618
1619 case R_VAX_PLT32:
1620 /* Relocation is to the entry for this symbol in the
1621 procedure linkage table. */
1622
1623 /* Resolve a PLTxx reloc against a local symbol directly,
1624 without using the procedure linkage table. */
1625 if (h == NULL)
1626 break;
1627
1628 if (h->plt.offset == (bfd_vma) -1
1629 || !elf_hash_table (info)->dynamic_sections_created)
1630 {
1631 /* We didn't make a PLT entry for this symbol. This
1632 happens when statically linking PIC code, or when
1633 using -Bsymbolic. */
1634 break;
1635 }
1636
1637 if (splt == NULL)
1638 {
1639 splt = bfd_get_section_by_name (dynobj, ".plt");
1640 BFD_ASSERT (splt != NULL);
1641 }
1642
1643 if (sgotplt == NULL)
1644 {
1645 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1646 BFD_ASSERT (splt != NULL);
1647 }
1648
1649 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1650
1651 /* Get the offset into the .got table of the entry that
1652 corresponds to this function. Each .got entry is 4 bytes.
1653 The first two are reserved. */
1654 got_offset = (plt_index + 3) * 4;
1655
1656 /* We want the relocate to point into the .got.plt instead
1657 of the plt itself. */
1658 relocation = (sgotplt->output_section->vma
1659 + sgotplt->output_offset
1660 + got_offset);
1661 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1662 if (rel->r_addend == 2)
1663 {
1664 h->plt.offset |= 1;
1665 }
1666 else if (rel->r_addend != 0)
1667 (*_bfd_error_handler)
1668 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1669 bfd_get_filename (input_bfd), rel->r_addend,
1670 h->root.root.string,
1671 bfd_get_section_name (input_bfd, input_section));
1672 rel->r_addend = 0;
1673
1674 break;
1675
1676 case R_VAX_PC8:
1677 case R_VAX_PC16:
1678 case R_VAX_PC32:
1679 if (h == NULL)
1680 break;
1681 /* Fall through. */
1682 case R_VAX_8:
1683 case R_VAX_16:
1684 case R_VAX_32:
1685 if (info->shared
1686 && r_symndx != 0
1687 && (input_section->flags & SEC_ALLOC) != 0
1688 && ((r_type != R_VAX_PC8
1689 && r_type != R_VAX_PC16
1690 && r_type != R_VAX_PC32)
1691 || (!info->symbolic
1692 || (h->elf_link_hash_flags
1693 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1694 {
1695 Elf_Internal_Rela outrel;
1696 bfd_byte *loc;
1697 bfd_boolean skip, relocate;
1698
1699 /* When generating a shared object, these relocations
1700 are copied into the output file to be resolved at run
1701 time. */
1702 if (sreloc == NULL)
1703 {
1704 const char *name;
1705
1706 name = (bfd_elf_string_from_elf_section
1707 (input_bfd,
1708 elf_elfheader (input_bfd)->e_shstrndx,
1709 elf_section_data (input_section)->rel_hdr.sh_name));
1710 if (name == NULL)
1711 return FALSE;
1712
1713 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1714 && strcmp (bfd_get_section_name (input_bfd,
1715 input_section),
1716 name + 5) == 0);
1717
1718 sreloc = bfd_get_section_by_name (dynobj, name);
1719 BFD_ASSERT (sreloc != NULL);
1720 }
1721
1722 skip = FALSE;
1723 relocate = FALSE;
1724
1725 outrel.r_offset =
1726 _bfd_elf_section_offset (output_bfd, info, input_section,
1727 rel->r_offset);
1728 if (outrel.r_offset == (bfd_vma) -1)
1729 skip = TRUE;
1730 if (outrel.r_offset == (bfd_vma) -2)
1731 skip = TRUE, relocate = TRUE;
1732 outrel.r_offset += (input_section->output_section->vma
1733 + input_section->output_offset);
1734
1735 if (skip)
1736 memset (&outrel, 0, sizeof outrel);
1737 /* h->dynindx may be -1 if the symbol was marked to
1738 become local. */
1739 else if (h != NULL
1740 && ((! info->symbolic && h->dynindx != -1)
1741 || (h->elf_link_hash_flags
1742 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1743 {
1744 BFD_ASSERT (h->dynindx != -1);
1745 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1746 outrel.r_addend = relocation + rel->r_addend;
1747 }
1748 else
1749 {
1750 if (r_type == R_VAX_32)
1751 {
1752 relocate = TRUE;
1753 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1754 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1755 &contents[rel->r_offset]) == 0);
1756 outrel.r_addend = relocation + rel->r_addend;
1757 }
1758 else
1759 {
1760 long indx;
1761
1762 if (h == NULL)
1763 sec = local_sections[r_symndx];
1764 else
1765 {
1766 BFD_ASSERT (h->root.type == bfd_link_hash_defined
1767 || (h->root.type
1768 == bfd_link_hash_defweak));
1769 sec = h->root.u.def.section;
1770 }
1771 if (sec != NULL && bfd_is_abs_section (sec))
1772 indx = 0;
1773 else if (sec == NULL || sec->owner == NULL)
1774 {
1775 bfd_set_error (bfd_error_bad_value);
1776 return FALSE;
1777 }
1778 else
1779 {
1780 asection *osec;
1781
1782 osec = sec->output_section;
1783 indx = elf_section_data (osec)->dynindx;
1784 BFD_ASSERT (indx > 0);
1785 }
1786
1787 outrel.r_info = ELF32_R_INFO (indx, r_type);
1788 outrel.r_addend = relocation + rel->r_addend;
1789 }
1790 }
1791
1792 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1793 ".text") != 0 ||
1794 (info->shared
1795 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1796 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1797 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1798 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1799 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1800 {
1801 if (h != NULL)
1802 (*_bfd_error_handler)
1803 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1804 bfd_get_filename (input_bfd), howto->name,
1805 h->root.root.string,
1806 bfd_get_section_name (input_bfd, input_section));
1807 else
1808 (*_bfd_error_handler)
1809 (_("%s: warning: %s relocation to 0x%x from %s section"),
1810 bfd_get_filename (input_bfd), howto->name,
1811 outrel.r_addend,
1812 bfd_get_section_name (input_bfd, input_section));
1813 }
1814 loc = sreloc->contents;
1815 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1816 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1817
1818 /* This reloc will be computed at runtime, so there's no
1819 need to do anything now, except for R_VAX_32
1820 relocations that have been turned into
1821 R_VAX_RELATIVE. */
1822 if (!relocate)
1823 continue;
1824 }
1825
1826 break;
1827
1828 case R_VAX_GNU_VTINHERIT:
1829 case R_VAX_GNU_VTENTRY:
1830 /* These are no-ops in the end. */
1831 continue;
1832
1833 default:
1834 break;
1835 }
1836
1837 /* VAX PCREL relocations are from the end of relocation, not the start.
1838 So subtract the difference from the relocation amount since we can't
1839 add it to the offset. */
1840 if (howto->pc_relative && howto->pcrel_offset)
1841 relocation -= bfd_get_reloc_size(howto);
1842
1843 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1844 contents, rel->r_offset,
1845 relocation, rel->r_addend);
1846
1847 if (r != bfd_reloc_ok)
1848 {
1849 switch (r)
1850 {
1851 default:
1852 case bfd_reloc_outofrange:
1853 abort ();
1854 case bfd_reloc_overflow:
1855 {
1856 const char *name;
1857
1858 if (h != NULL)
1859 name = h->root.root.string;
1860 else
1861 {
1862 name = bfd_elf_string_from_elf_section (input_bfd,
1863 symtab_hdr->sh_link,
1864 sym->st_name);
1865 if (name == NULL)
1866 return FALSE;
1867 if (*name == '\0')
1868 name = bfd_section_name (input_bfd, sec);
1869 }
1870 if (!(info->callbacks->reloc_overflow
1871 (info, name, howto->name, (bfd_vma) 0,
1872 input_bfd, input_section, rel->r_offset)))
1873 return FALSE;
1874 }
1875 break;
1876 }
1877 }
1878 }
1879
1880 return TRUE;
1881}
1882
1883/* Finish up dynamic symbol handling. We set the contents of various
1884 dynamic sections here. */
1885
1886static bfd_boolean
1887elf_vax_finish_dynamic_symbol (output_bfd, info, h, sym)
1888 bfd *output_bfd;
1889 struct bfd_link_info *info;
1890 struct elf_link_hash_entry *h;
1891 Elf_Internal_Sym *sym;
1892{
1893 bfd *dynobj;
1894
1895 dynobj = elf_hash_table (info)->dynobj;
1896
1897 if (h->plt.offset != (bfd_vma) -1)
1898 {
1899 asection *splt;
1900 asection *sgot;
1901 asection *srela;
1902 bfd_vma plt_index;
1903 bfd_vma got_offset;
1904 bfd_vma addend;
1905 Elf_Internal_Rela rela;
1906 bfd_byte *loc;
1907
1908 /* This symbol has an entry in the procedure linkage table. Set
1909 it up. */
1910 BFD_ASSERT (h->dynindx != -1);
1911
1912 splt = bfd_get_section_by_name (dynobj, ".plt");
1913 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1914 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1915 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1916
1917 addend = 2 * (h->plt.offset & 1);
1918 h->plt.offset &= ~1;
1919
1920 /* Get the index in the procedure linkage table which
1921 corresponds to this symbol. This is the index of this symbol
1922 in all the symbols for which we are making plt entries. The
1923 first entry in the procedure linkage table is reserved. */
1924 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1925
1926 /* Get the offset into the .got table of the entry that
1927 corresponds to this function. Each .got entry is 4 bytes.
1928 The first two are reserved. */
1929 got_offset = (plt_index + 3) * 4;
1930
1931 /* Fill in the entry in the procedure linkage table. */
1932 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1933 PLT_ENTRY_SIZE);
1934
1935 /* The offset is relative to the first extension word. */
1936 bfd_put_32 (output_bfd,
1937 -(h->plt.offset + 8),
1938 splt->contents + h->plt.offset + 4);
1939
1940 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1941 splt->contents + h->plt.offset + 8);
1942
1943 /* Fill in the entry in the global offset table. */
1944 bfd_put_32 (output_bfd,
1945 (splt->output_section->vma
1946 + splt->output_offset
1947 + h->plt.offset) + addend,
1948 sgot->contents + got_offset);
1949
1950 /* Fill in the entry in the .rela.plt section. */
1951 rela.r_offset = (sgot->output_section->vma
1952 + sgot->output_offset
1953 + got_offset);
1954 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1955 rela.r_addend = addend;
1956 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1957 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1958
1959 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1960 {
1961 /* Mark the symbol as undefined, rather than as defined in
1962 the .plt section. Leave the value alone. */
1963 sym->st_shndx = SHN_UNDEF;
1964 }
1965 }
1966
1967 if (h->got.offset != (bfd_vma) -1)
1968 {
1969 asection *sgot;
1970 asection *srela;
1971 Elf_Internal_Rela rela;
1972 bfd_byte *loc;
1973
1974 /* This symbol has an entry in the global offset table. Set it
1975 up. */
1976 sgot = bfd_get_section_by_name (dynobj, ".got");
1977 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1978 BFD_ASSERT (sgot != NULL && srela != NULL);
1979
1980 rela.r_offset = (sgot->output_section->vma
1981 + sgot->output_offset
1982 + (h->got.offset &~ 1));
1983
1984 /* If the symbol was forced to be local because of a version file
1985 locally we just want to emit a RELATIVE reloc. The entry in
1986 the global offset table will already have been initialized in
1987 the relocate_section function. */
1988 if (info->shared
1989 && h->dynindx == -1
1990 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
1991 {
1992 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1993 }
1994 else
1995 {
1996 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1997 }
1998 rela.r_addend = bfd_get_signed_32 (output_bfd,
1999 (sgot->contents
2000 + (h->got.offset & ~1)));
2001
2002 loc = srela->contents;
2003 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2004 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2005 }
2006
2007 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2008 {
2009 asection *s;
2010 Elf_Internal_Rela rela;
2011 bfd_byte *loc;
2012
2013 /* This symbol needs a copy reloc. Set it up. */
2014 BFD_ASSERT (h->dynindx != -1
2015 && (h->root.type == bfd_link_hash_defined
2016 || h->root.type == bfd_link_hash_defweak));
2017
2018 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2019 ".rela.bss");
2020 BFD_ASSERT (s != NULL);
2021
2022 rela.r_offset = (h->root.u.def.value
2023 + h->root.u.def.section->output_section->vma
2024 + h->root.u.def.section->output_offset);
2025 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
2026 rela.r_addend = 0;
2027 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2028 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2029 }
2030
2031 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2032 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2033 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2034 sym->st_shndx = SHN_ABS;
2035
2036 return TRUE;
2037}
2038
2039/* Finish up the dynamic sections. */
2040
2041static bfd_boolean
2042elf_vax_finish_dynamic_sections (output_bfd, info)
2043 bfd *output_bfd;
2044 struct bfd_link_info *info;
2045{
2046 bfd *dynobj;
2047 asection *sgot;
2048 asection *sdyn;
2049
2050 dynobj = elf_hash_table (info)->dynobj;
2051
2052 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2053 BFD_ASSERT (sgot != NULL);
2054 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2055
2056 if (elf_hash_table (info)->dynamic_sections_created)
2057 {
2058 asection *splt;
2059 Elf32_External_Dyn *dyncon, *dynconend;
2060
2061 splt = bfd_get_section_by_name (dynobj, ".plt");
2062 BFD_ASSERT (splt != NULL && sdyn != NULL);
2063
2064 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2065 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2066 for (; dyncon < dynconend; dyncon++)
2067 {
2068 Elf_Internal_Dyn dyn;
2069 const char *name;
2070 asection *s;
2071
2072 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2073
2074 switch (dyn.d_tag)
2075 {
2076 default:
2077 break;
2078
2079 case DT_PLTGOT:
2080 name = ".got";
2081 goto get_vma;
2082 case DT_JMPREL:
2083 name = ".rela.plt";
2084 get_vma:
2085 s = bfd_get_section_by_name (output_bfd, name);
2086 BFD_ASSERT (s != NULL);
2087 dyn.d_un.d_ptr = s->vma;
2088 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2089 break;
2090
2091 case DT_PLTRELSZ:
2092 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2093 BFD_ASSERT (s != NULL);
2094 if (s->_cooked_size != 0)
2095 dyn.d_un.d_val = s->_cooked_size;
2096 else
2097 dyn.d_un.d_val = s->_raw_size;
2098 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2099 break;
2100
2101 case DT_RELASZ:
2102 /* The procedure linkage table relocs (DT_JMPREL) should
2103 not be included in the overall relocs (DT_RELA).
2104 Therefore, we override the DT_RELASZ entry here to
2105 make it not include the JMPREL relocs. Since the
2106 linker script arranges for .rela.plt to follow all
2107 other relocation sections, we don't have to worry
2108 about changing the DT_RELA entry. */
2109 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2110 if (s != NULL)
2111 {
2112 if (s->_cooked_size != 0)
2113 dyn.d_un.d_val -= s->_cooked_size;
2114 else
2115 dyn.d_un.d_val -= s->_raw_size;
2116 }
2117 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2118 break;
2119 }
2120 }
2121
2122 /* Fill in the first entry in the procedure linkage table. */
2123 if (splt->_raw_size > 0)
2124 {
2125 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2126 bfd_put_32 (output_bfd,
2127 (sgot->output_section->vma
2128 + sgot->output_offset + 4
2129 - (splt->output_section->vma + 6)),
2130 splt->contents + 2);
2131 bfd_put_32 (output_bfd,
2132 (sgot->output_section->vma
2133 + sgot->output_offset + 8
2134 - (splt->output_section->vma + 12)),
2135 splt->contents + 8);
2136 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2137 = PLT_ENTRY_SIZE;
2138 }
2139 }
2140
2141 /* Fill in the first three entries in the global offset table. */
2142 if (sgot->_raw_size > 0)
2143 {
2144 if (sdyn == NULL)
2145 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2146 else
2147 bfd_put_32 (output_bfd,
2148 sdyn->output_section->vma + sdyn->output_offset,
2149 sgot->contents);
2150 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2151 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2152 }
2153
2154 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2155
2156 return TRUE;
2157}
2158
2159#define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2160#define TARGET_LITTLE_NAME "elf32-vax"
2161#define ELF_MACHINE_CODE EM_VAX
2162#define ELF_MAXPAGESIZE 0x1000
2163
2164#define elf_backend_create_dynamic_sections \
2165 _bfd_elf_create_dynamic_sections
2166#define bfd_elf32_bfd_link_hash_table_create \
2167 elf_vax_link_hash_table_create
2168#define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
2169
2170#define elf_backend_check_relocs elf_vax_check_relocs
2171#define elf_backend_adjust_dynamic_symbol \
2172 elf_vax_adjust_dynamic_symbol
2173#define elf_backend_size_dynamic_sections \
2174 elf_vax_size_dynamic_sections
2175#define elf_backend_relocate_section elf_vax_relocate_section
2176#define elf_backend_finish_dynamic_symbol \
2177 elf_vax_finish_dynamic_symbol
2178#define elf_backend_finish_dynamic_sections \
2179 elf_vax_finish_dynamic_sections
2180#define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2181#define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2182#define bfd_elf32_bfd_merge_private_bfd_data \
2183 elf32_vax_merge_private_bfd_data
2184#define bfd_elf32_bfd_set_private_flags \
2185 elf32_vax_set_private_flags
2186#define bfd_elf32_bfd_print_private_bfd_data \
2187 elf32_vax_print_private_bfd_data
2188
2189#define elf_backend_can_gc_sections 1
2190#define elf_backend_want_got_plt 1
2191#define elf_backend_plt_readonly 1
2192#define elf_backend_want_plt_sym 0
2193#define elf_backend_got_header_size 16
2194#define elf_backend_rela_normal 1
2195
2196#include "elf32-target.h"
Note: See TracBrowser for help on using the repository browser.