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* elf64-ppc.c (ppc64_elf_size_dynamic_sections): Don't allocate
[deliverable/binutils-gdb.git] / bfd / elf32-vax.c
CommitLineData
90ace9e9
JT		 1/* VAX series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
4 Contributed by Matt Thomas <matt@3am-software.com>.
5
6This file is part of BFD, the Binary File Descriptor library.
7
8This program is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 2 of the License, or
11(at your option) any later version.
12
13This program is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with this program; if not, write to the Free Software
20Foundation, 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 *, Elf32_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 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 ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
42 struct elf_link_hash_entry *, Elf_Internal_Sym *));
43static boolean elf_vax_gc_sweep_hook
44 PARAMS ((bfd *, struct bfd_link_info *, asection *,
45 const Elf_Internal_Rela *));
46static boolean elf_vax_adjust_dynamic_symbol
47 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
48static boolean elf_vax_size_dynamic_sections
49 PARAMS ((bfd *, struct bfd_link_info *));
50static 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 boolean elf_vax_finish_dynamic_symbol
54 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
55 Elf_Internal_Sym *));
56static boolean elf_vax_finish_dynamic_sections
57 PARAMS ((bfd *, struct bfd_link_info *));
58
59static boolean elf32_vax_set_private_flags
60 PARAMS ((bfd *, flagword));
61static boolean elf32_vax_merge_private_bfd_data
62 PARAMS ((bfd *, bfd *));
63static 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#define USE_RELA
346\f
347/* Functions for the VAX ELF linker. */
348
349/* The name of the dynamic interpreter. This is put in the .interp
350 section. */
351
352#define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
353
354/* The size in bytes of an entry in the procedure linkage table. */
355
356#define PLT_ENTRY_SIZE 12
357
358/* The first entry in a procedure linkage table looks like this. See
359 the SVR4 ABI VAX supplement to see how this works. */
360
361static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
362{
363 0xdd, 0xef, /* pushl l^ */
364 0, 0, 0, 0, /* offset to .plt.got + 4 */
365 0x17, 0xff, /* jmp @L^(pc) */
366 0, 0, 0, 0, /* offset to .plt.got + 8 */
367};
368
369/* Subsequent entries in a procedure linkage table look like this. */
370
371static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
372{
373 0x40, 0x00, /* .word ^M<r6> */
374 0x16, 0xef, /* jsb L^(pc) */
375 0, 0, 0, 0, /* replaced with offset to start of .plt */
376 0, 0, 0, 0, /* index into .rela.plt */
377};
378
379/* The VAX linker needs to keep track of the number of relocs that it
380 decides to copy in check_relocs for each symbol. This is so that it
381 can discard PC relative relocs if it doesn't need them when linking
382 with -Bsymbolic. We store the information in a field extending the
383 regular ELF linker hash table. */
384
385/* This structure keeps track of the number of PC relative relocs we have
386 copied for a given symbol. */
387
388struct elf_vax_pcrel_relocs_copied
389{
390 /* Next section. */
391 struct elf_vax_pcrel_relocs_copied *next;
392 /* A section in dynobj. */
393 asection *section;
394 /* Number of relocs copied in this section. */
395 bfd_size_type count;
396};
397
398/* VAX ELF linker hash entry. */
399
400struct elf_vax_link_hash_entry
401{
402 struct elf_link_hash_entry root;
403
404 /* Number of PC relative relocs copied for this symbol. */
405 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
406
407 bfd_vma got_addend;
408};
409
410/* VAX ELF linker hash table. */
411
412struct elf_vax_link_hash_table
413{
414 struct elf_link_hash_table root;
415};
416
417/* Declare this now that the above structures are defined. */
418
419static boolean elf_vax_discard_copies
420 PARAMS ((struct elf_vax_link_hash_entry *, PTR));
421
422/* Traverse an VAX ELF linker hash table. */
423
424#define elf_vax_link_hash_traverse(table, func, info) \
425 (elf_link_hash_traverse \
426 (&(table)->root, \
427 (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
428 (info)))
429
430/* Get the VAX ELF linker hash table from a link_info structure. */
431
432#define elf_vax_hash_table(p) \
433 ((struct elf_vax_link_hash_table *) (p)->hash)
434
435/* Create an entry in an VAX ELF linker hash table. */
436
437static struct bfd_hash_entry *
438elf_vax_link_hash_newfunc (entry, table, string)
439 struct bfd_hash_entry *entry;
440 struct bfd_hash_table *table;
441 const char *string;
442{
443 struct elf_vax_link_hash_entry *ret =
444 (struct elf_vax_link_hash_entry *) entry;
445
446 /* Allocate the structure if it has not already been allocated by a
447 subclass. */
448 if (ret == (struct elf_vax_link_hash_entry *) NULL)
449 ret = ((struct elf_vax_link_hash_entry *)
450 bfd_hash_allocate (table,
451 sizeof (struct elf_vax_link_hash_entry)));
452 if (ret == (struct elf_vax_link_hash_entry *) NULL)
453 return (struct bfd_hash_entry *) ret;
454
455 /* Call the allocation method of the superclass. */
456 ret = ((struct elf_vax_link_hash_entry *)
457 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
458 table, string));
459 if (ret != (struct elf_vax_link_hash_entry *) NULL)
460 {
461 ret->pcrel_relocs_copied = NULL;
462 }
463
464 return (struct bfd_hash_entry *) ret;
465}
466
467/* Create an VAX ELF linker hash table. */
468
469static struct bfd_link_hash_table *
470elf_vax_link_hash_table_create (abfd)
471 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 = (struct elf_vax_link_hash_table *) bfd_malloc (amt);
477 if (ret == (struct elf_vax_link_hash_table *) NULL)
478 return NULL;
479
480 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
481 elf_vax_link_hash_newfunc))
482 {
483 free (ret);
484 return NULL;
485 }
486
487 return &ret->root.root;
488}
489
490/* Keep vax-specific flags in the ELF header */
491static boolean
492elf32_vax_set_private_flags (abfd, flags)
493 bfd *abfd;
494 flagword flags;
495{
496 elf_elfheader (abfd)->e_flags = flags;
497 elf_flags_init (abfd) = true;
498 return true;
499}
500
501/* Merge backend specific data from an object file to the output
502 object file when linking. */
503static boolean
504elf32_vax_merge_private_bfd_data (ibfd, obfd)
505 bfd *ibfd;
506 bfd *obfd;
507{
508 flagword out_flags;
509 flagword in_flags;
510
511 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
512 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
513 return true;
514
515 in_flags = elf_elfheader (ibfd)->e_flags;
516 out_flags = elf_elfheader (obfd)->e_flags;
517
518 if (!elf_flags_init (obfd))
519 {
520 elf_flags_init (obfd) = true;
521 elf_elfheader (obfd)->e_flags = in_flags;
522 }
523
524 return true;
525}
526
527/* Display the flags field */
528static boolean
529elf32_vax_print_private_bfd_data (abfd, ptr)
530 bfd *abfd;
531 PTR ptr;
532{
533 FILE *file = (FILE *) ptr;
534
535 BFD_ASSERT (abfd != NULL && ptr != NULL);
536
537 /* Print normal ELF private data. */
538 _bfd_elf_print_private_bfd_data (abfd, ptr);
539
540 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
541
542 /* xgettext:c-format */
543 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
544
545 if (elf_elfheader (abfd)->e_flags & EF_NONPIC)
546 fprintf (file, _(" [nonpic]"));
547
548 if (elf_elfheader (abfd)->e_flags & EF_DFLOAT)
549 fprintf (file, _(" [d-float]"));
550
551 if (elf_elfheader (abfd)->e_flags & EF_GFLOAT)
552 fprintf (file, _(" [g-float]"));
553
554 fputc ('\n', file);
555
556 return true;
557}
558/* Look through the relocs for a section during the first phase, and
559 allocate space in the global offset table or procedure linkage
560 table. */
561
562static boolean
563elf_vax_check_relocs (abfd, info, sec, relocs)
564 bfd *abfd;
565 struct bfd_link_info *info;
566 asection *sec;
567 const Elf_Internal_Rela *relocs;
568{
569 bfd *dynobj;
570 Elf_Internal_Shdr *symtab_hdr;
571 struct elf_link_hash_entry **sym_hashes;
572 bfd_signed_vma *local_got_refcounts;
573 const Elf_Internal_Rela *rel;
574 const Elf_Internal_Rela *rel_end;
575 asection *sgot;
576 asection *srelgot;
577 asection *sreloc;
578
579 if (info->relocateable)
580 return true;
581
582 dynobj = elf_hash_table (info)->dynobj;
583 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
584 sym_hashes = elf_sym_hashes (abfd);
585 local_got_refcounts = elf_local_got_refcounts (abfd);
586
587 sgot = NULL;
588 srelgot = NULL;
589 sreloc = NULL;
590
591 rel_end = relocs + sec->reloc_count;
592 for (rel = relocs; rel < rel_end; rel++)
593 {
594 unsigned long r_symndx;
595 struct elf_link_hash_entry *h;
596
597 r_symndx = ELF32_R_SYM (rel->r_info);
598
599 if (r_symndx < symtab_hdr->sh_info)
600 h = NULL;
601 else
602 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
603
604 switch (ELF32_R_TYPE (rel->r_info))
605 {
606 case R_VAX_GOT32:
607 if (h != NULL
608 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
609 break;
610
611 /* This symbol requires a global offset table entry. */
612
613 if (dynobj == NULL)
614 {
615 /* Create the .got section. */
616 elf_hash_table (info)->dynobj = dynobj = abfd;
617 if (!_bfd_elf_create_got_section (dynobj, info))
618 return false;
619 }
620
621 if (sgot == NULL)
622 {
623 sgot = bfd_get_section_by_name (dynobj, ".got");
624 BFD_ASSERT (sgot != NULL);
625 }
626
627 if (srelgot == NULL
628 && (h != NULL || info->shared))
629 {
630 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
631 if (srelgot == NULL)
632 {
633 srelgot = bfd_make_section (dynobj, ".rela.got");
634 if (srelgot == NULL
635 || !bfd_set_section_flags (dynobj, srelgot,
636 (SEC_ALLOC
637 | SEC_LOAD
638 | SEC_HAS_CONTENTS
639 | SEC_IN_MEMORY
640 | SEC_LINKER_CREATED
641 | SEC_READONLY))
642 || !bfd_set_section_alignment (dynobj, srelgot, 2))
643 return false;
644 }
645 }
646
647 if (h != NULL)
648 {
649 struct elf_vax_link_hash_entry *eh;
650
651 eh = (struct elf_vax_link_hash_entry *) h;
652 if (h->got.refcount == -1)
653 {
654 h->got.refcount = 1;
655 eh->got_addend = rel->r_addend;
656
657 /* Make sure this symbol is output as a dynamic symbol. */
658 if (h->dynindx == -1)
659 {
660 if (!bfd_elf32_link_record_dynamic_symbol (info, h))
661 return false;
662 }
663
664 /* Allocate space in the .got section. */
665 sgot->_raw_size += 4;
666 /* Allocate relocation space. */
667 srelgot->_raw_size += sizeof (Elf32_External_Rela);
668 }
669 else
670 {
671 h->got.refcount++;
672 if (eh->got_addend != (bfd_vma) rel->r_addend)
673 (*_bfd_error_handler)
674 (_("%s: warning: GOT addend of %ld to `%s' does not match previous GOT addend of %ld"),
675 bfd_get_filename (abfd), rel->r_addend,
676 h->root.root.string,
677 eh->got_addend);
678
679 }
680 }
681 break;
682
683 case R_VAX_PLT32:
684 /* This symbol requires a procedure linkage table entry. We
685 actually build the entry in adjust_dynamic_symbol,
686 because this might be a case of linking PIC code which is
687 never referenced by a dynamic object, in which case we
688 don't need to generate a procedure linkage table entry
689 after all. */
690
691 /* If this is a local symbol, we resolve it directly without
692 creating a procedure linkage table entry. */
693 if (h == NULL)
694 continue;
695
696 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
697 if (h->plt.refcount == -1)
698 h->plt.refcount = 1;
699 else
700 h->plt.refcount++;
701 break;
702
703 case R_VAX_PC8:
704 case R_VAX_PC16:
705 case R_VAX_PC32:
706 /* If we are creating a shared library and this is not a local
707 symbol, we need to copy the reloc into the shared library.
708 However when linking with -Bsymbolic and this is a global
709 symbol which is defined in an object we are including in the
710 link (i.e., DEF_REGULAR is set), then we can resolve the
711 reloc directly. At this point we have not seen all the input
712 files, so it is possible that DEF_REGULAR is not set now but
713 will be set later (it is never cleared). We account for that
714 possibility below by storing information in the
715 pcrel_relocs_copied field of the hash table entry. */
716 if (!(info->shared
717 && (sec->flags & SEC_ALLOC) != 0
718 && h != NULL
719 && (!info->symbolic
720 || (h->elf_link_hash_flags
721 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
722 {
723 if (h != NULL)
724 {
725 /* Make sure a plt entry is created for this symbol if
726 it turns out to be a function defined by a dynamic
727 object. */
728 if (h->plt.refcount == -1)
729 h->plt.refcount = 1;
730 else
731 h->plt.refcount++;
732 }
733 break;
734 }
735 /* Fall through. */
736 case R_VAX_8:
737 case R_VAX_16:
738 case R_VAX_32:
739 if (h != NULL)
740 {
741 /* Make sure a plt entry is created for this symbol if it
742 turns out to be a function defined by a dynamic object. */
743 if (h->plt.refcount == -1)
744 h->plt.refcount = 1;
745 else
746 h->plt.refcount++;
747 }
748
749 /* If we are creating a shared library, we need to copy the
750 reloc into the shared library. */
751 if (info->shared
752 && (sec->flags & SEC_ALLOC) != 0)
753 {
754 /* When creating a shared object, we must copy these
755 reloc types into the output file. We create a reloc
756 section in dynobj and make room for this reloc. */
757 if (sreloc == NULL)
758 {
759 const char *name;
760
761 name = (bfd_elf_string_from_elf_section
762 (abfd,
763 elf_elfheader (abfd)->e_shstrndx,
764 elf_section_data (sec)->rel_hdr.sh_name));
765 if (name == NULL)
766 return false;
767
768 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
769 && strcmp (bfd_get_section_name (abfd, sec),
770 name + 5) == 0);
771
772 sreloc = bfd_get_section_by_name (dynobj, name);
773 if (sreloc == NULL)
774 {
775 sreloc = bfd_make_section (dynobj, name);
776 if (sreloc == NULL
777 || !bfd_set_section_flags (dynobj, sreloc,
778 (SEC_ALLOC
779 | SEC_LOAD
780 | SEC_HAS_CONTENTS
781 | SEC_IN_MEMORY
782 | SEC_LINKER_CREATED
783 | SEC_READONLY))
784 || !bfd_set_section_alignment (dynobj, sreloc, 2))
785 return false;
786 }
787 if (sec->flags & SEC_READONLY)
788 info->flags |= DF_TEXTREL;
789 }
790
791 sreloc->_raw_size += sizeof (Elf32_External_Rela);
792
793 /* If we are linking with -Bsymbolic, we count the number of
794 PC relative relocations we have entered for this symbol,
795 so that we can discard them again if the symbol is later
796 defined by a regular object. Note that this function is
797 only called if we are using an vaxelf linker hash table,
798 which means that h is really a pointer to an
799 elf_vax_link_hash_entry. */
800 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
801 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
802 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
803 && info->symbolic)
804 {
805 struct elf_vax_link_hash_entry *eh;
806 struct elf_vax_pcrel_relocs_copied *p;
807
808 eh = (struct elf_vax_link_hash_entry *) h;
809
810 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
811 if (p->section == sreloc)
812 break;
813
814 if (p == NULL)
815 {
816 p = ((struct elf_vax_pcrel_relocs_copied *)
817 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
818 if (p == NULL)
819 return false;
820 p->next = eh->pcrel_relocs_copied;
821 eh->pcrel_relocs_copied = p;
822 p->section = sreloc;
823 p->count = 0;
824 }
825
826 ++p->count;
827 }
828 }
829
830 break;
831
832 /* This relocation describes the C++ object vtable hierarchy.
833 Reconstruct it for later use during GC. */
834 case R_VAX_GNU_VTINHERIT:
835 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
836 return false;
837 break;
838
839 /* This relocation describes which C++ vtable entries are actually
840 used. Record for later use during GC. */
841 case R_VAX_GNU_VTENTRY:
842 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
843 return false;
844 break;
845
846 default:
847 break;
848 }
849 }
850
851 return true;
852}
853
854/* Return the section that should be marked against GC for a given
855 relocation. */
856
857static asection *
858elf_vax_gc_mark_hook (abfd, info, rel, h, sym)
859 bfd *abfd;
860 struct bfd_link_info *info ATTRIBUTE_UNUSED;
861 Elf_Internal_Rela *rel;
862 struct elf_link_hash_entry *h;
863 Elf_Internal_Sym *sym;
864{
865 if (h != NULL)
866 {
867 switch (ELF32_R_TYPE (rel->r_info))
868 {
869 case R_VAX_GNU_VTINHERIT:
870 case R_VAX_GNU_VTENTRY:
871 break;
872
873 default:
874 switch (h->root.type)
875 {
876 default:
877 break;
878
879 case bfd_link_hash_defined:
880 case bfd_link_hash_defweak:
881 return h->root.u.def.section;
882
883 case bfd_link_hash_common:
884 return h->root.u.c.p->section;
885 }
886 }
887 }
888 else
889 {
890 if (!(elf_bad_symtab (abfd)
891 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
892 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
893 && sym->st_shndx != SHN_COMMON))
894 {
895 return bfd_section_from_elf_index (abfd, sym->st_shndx);
896 }
897 }
898
899 return NULL;
900}
901
902/* Update the got entry reference counts for the section being removed. */
903
904static boolean
905elf_vax_gc_sweep_hook (abfd, info, sec, relocs)
906 bfd *abfd;
907 struct bfd_link_info *info;
908 asection *sec;
909 const Elf_Internal_Rela *relocs;
910{
911 Elf_Internal_Shdr *symtab_hdr;
912 struct elf_link_hash_entry **sym_hashes;
913 bfd_signed_vma *local_got_refcounts;
914 const Elf_Internal_Rela *rel, *relend;
915 unsigned long r_symndx;
916 struct elf_link_hash_entry *h;
917 bfd *dynobj;
918 asection *sgot;
919 asection *srelgot;
920
921 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
922 sym_hashes = elf_sym_hashes (abfd);
923 local_got_refcounts = elf_local_got_refcounts (abfd);
924
925 dynobj = elf_hash_table (info)->dynobj;
926 if (dynobj == NULL)
927 return true;
928
929 sgot = bfd_get_section_by_name (dynobj, ".got");
930 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
931
932 relend = relocs + sec->reloc_count;
933 for (rel = relocs; rel < relend; rel++)
934 {
935 switch (ELF32_R_TYPE (rel->r_info))
936 {
937 case R_VAX_GOT32:
938 r_symndx = ELF32_R_SYM (rel->r_info);
939 if (r_symndx >= symtab_hdr->sh_info)
940 {
941 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
942 if (h->got.refcount > 0)
943 {
944 --h->got.refcount;
945 if (h->got.refcount == 0)
946 {
947 /* We don't need the .got entry any more. */
948 sgot->_raw_size -= 4;
949 srelgot->_raw_size -= sizeof (Elf32_External_Rela);
950 }
951 }
952 }
953 else if (local_got_refcounts != NULL)
954 {
955 if (local_got_refcounts[r_symndx] > 0)
956 {
957 --local_got_refcounts[r_symndx];
958 if (local_got_refcounts[r_symndx] == 0)
959 {
960 /* We don't need the .got entry any more. */
961 sgot->_raw_size -= 4;
962 if (info->shared)
963 srelgot->_raw_size -= sizeof (Elf32_External_Rela);
964 }
965 }
966 }
967 break;
968
969 case R_VAX_PLT32:
970 case R_VAX_PC8:
971 case R_VAX_PC16:
972 case R_VAX_PC32:
973 case R_VAX_8:
974 case R_VAX_16:
975 case R_VAX_32:
976 r_symndx = ELF32_R_SYM (rel->r_info);
977 if (r_symndx >= symtab_hdr->sh_info)
978 {
979 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
980 if (h->plt.refcount > 0)
981 --h->plt.refcount;
982 }
983 break;
984
985 default:
986 break;
987 }
988 }
989
990 return true;
991}
992
993/* Adjust a symbol defined by a dynamic object and referenced by a
994 regular object. The current definition is in some section of the
995 dynamic object, but we're not including those sections. We have to
996 change the definition to something the rest of the link can
997 understand. */
998
999static boolean
1000elf_vax_adjust_dynamic_symbol (info, h)
1001 struct bfd_link_info *info;
1002 struct elf_link_hash_entry *h;
1003{
1004 bfd *dynobj;
1005 asection *s;
1006 unsigned int power_of_two;
1007
1008 dynobj = elf_hash_table (info)->dynobj;
1009
1010 /* Make sure we know what is going on here. */
1011 BFD_ASSERT (dynobj != NULL
1012 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
1013 || h->weakdef != NULL
1014 || ((h->elf_link_hash_flags
1015 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1016 && (h->elf_link_hash_flags
1017 & ELF_LINK_HASH_REF_REGULAR) != 0
1018 && (h->elf_link_hash_flags
1019 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
1020
1021 /* If this is a function, put it in the procedure linkage table. We
1022 will fill in the contents of the procedure linkage table later,
1023 when we know the address of the .got section. */
1024 if (h->type == STT_FUNC
1025 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1026 {
1027 if (! info->shared
1028 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
1029 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
1030 /* We must always create the plt entry if it was referenced
1031 by a PLTxxO relocation. In this case we already recorded
1032 it as a dynamic symbol. */
1033 && h->dynindx == -1)
1034 {
1035 /* This case can occur if we saw a PLTxx reloc in an input
1036 file, but the symbol was never referred to by a dynamic
1037 object. In such a case, we don't actually need to build
1038 a procedure linkage table, and we can just do a PCxx
1039 reloc instead. */
1040 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
1041 h->plt.offset = (bfd_vma) -1;
1042 return true;
1043 }
1044
1045 /* GC may have rendered this entry unused. */
1046 if (h->plt.refcount <= 0)
1047 {
1048 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1049 h->plt.offset = (bfd_vma) -1;
1050 return true;
1051 }
1052
1053 /* Make sure this symbol is output as a dynamic symbol. */
1054 if (h->dynindx == -1)
1055 {
1056 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1057 return false;
1058 }
1059
1060 s = bfd_get_section_by_name (dynobj, ".plt");
1061 BFD_ASSERT (s != NULL);
1062
1063 /* If this is the first .plt entry, make room for the special
1064 first entry. */
1065 if (s->_raw_size == 0)
1066 {
1067 s->_raw_size += PLT_ENTRY_SIZE;
1068 }
1069
1070 /* If this symbol is not defined in a regular file, and we are
1071 not generating a shared library, then set the symbol to this
1072 location in the .plt. This is required to make function
1073 pointers compare as equal between the normal executable and
1074 the shared library. */
1075 if (!info->shared
1076 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1077 {
1078 h->root.u.def.section = s;
1079 h->root.u.def.value = s->_raw_size;
1080 }
1081
1082 h->plt.offset = s->_raw_size;
1083
1084 /* Make room for this entry. */
1085 s->_raw_size += PLT_ENTRY_SIZE;
1086
1087 /* We also need to make an entry in the .got.plt section, which
1088 will be placed in the .got section by the linker script. */
1089
1090 s = bfd_get_section_by_name (dynobj, ".got.plt");
1091 BFD_ASSERT (s != NULL);
1092 s->_raw_size += 4;
1093
1094 /* We also need to make an entry in the .rela.plt section. */
1095
1096 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1097 BFD_ASSERT (s != NULL);
1098 s->_raw_size += sizeof (Elf32_External_Rela);
1099
1100 return true;
1101 }
1102
1103 /* Reinitialize the plt offset now that it is not used as a reference
1104 count any more. */
1105 h->plt.offset = (bfd_vma) -1;
1106
1107 /* If this is a weak symbol, and there is a real definition, the
1108 processor independent code will have arranged for us to see the
1109 real definition first, and we can just use the same value. */
1110 if (h->weakdef != NULL)
1111 {
1112 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1113 || h->weakdef->root.type == bfd_link_hash_defweak);
1114 h->root.u.def.section = h->weakdef->root.u.def.section;
1115 h->root.u.def.value = h->weakdef->root.u.def.value;
1116 return true;
1117 }
1118
1119 /* This is a reference to a symbol defined by a dynamic object which
1120 is not a function. */
1121
1122 /* If we are creating a shared library, we must presume that the
1123 only references to the symbol are via the global offset table.
1124 For such cases we need not do anything here; the relocations will
1125 be handled correctly by relocate_section. */
1126 if (info->shared)
1127 return true;
1128
1129 /* We must allocate the symbol in our .dynbss section, which will
1130 become part of the .bss section of the executable. There will be
1131 an entry for this symbol in the .dynsym section. The dynamic
1132 object will contain position independent code, so all references
1133 from the dynamic object to this symbol will go through the global
1134 offset table. The dynamic linker will use the .dynsym entry to
1135 determine the address it must put in the global offset table, so
1136 both the dynamic object and the regular object will refer to the
1137 same memory location for the variable. */
1138
1139 s = bfd_get_section_by_name (dynobj, ".dynbss");
1140 BFD_ASSERT (s != NULL);
1141
1142 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1143 copy the initial value out of the dynamic object and into the
1144 runtime process image. We need to remember the offset into the
1145 .rela.bss section we are going to use. */
1146 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1147 {
1148 asection *srel;
1149
1150 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1151 BFD_ASSERT (srel != NULL);
1152 srel->_raw_size += sizeof (Elf32_External_Rela);
1153 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1154 }
1155
1156 /* We need to figure out the alignment required for this symbol. I
1157 have no idea how ELF linkers handle this. */
1158 power_of_two = bfd_log2 (h->size);
1159 if (power_of_two > 3)
1160 power_of_two = 3;
1161
1162 /* Apply the required alignment. */
1163 s->_raw_size = BFD_ALIGN (s->_raw_size,
1164 (bfd_size_type) (1 << power_of_two));
1165 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1166 {
1167 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
1168 return false;
1169 }
1170
1171 /* Define the symbol as being at this point in the section. */
1172 h->root.u.def.section = s;
1173 h->root.u.def.value = s->_raw_size;
1174
1175 /* Increment the section size to make room for the symbol. */
1176 s->_raw_size += h->size;
1177
1178 return true;
1179}
1180
1181/* Set the sizes of the dynamic sections. */
1182
1183static boolean
1184elf_vax_size_dynamic_sections (output_bfd, info)
1185 bfd *output_bfd;
1186 struct bfd_link_info *info;
1187{
1188 bfd *dynobj;
1189 asection *s;
1190 boolean plt;
1191 boolean relocs;
1192 boolean reltext;
1193
1194 dynobj = elf_hash_table (info)->dynobj;
1195 BFD_ASSERT (dynobj != NULL);
1196
1197 if (elf_hash_table (info)->dynamic_sections_created)
1198 {
1199 /* Set the contents of the .interp section to the interpreter. */
1200 if (!info->shared)
1201 {
1202 s = bfd_get_section_by_name (dynobj, ".interp");
1203 BFD_ASSERT (s != NULL);
1204 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1205 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1206 }
1207 }
1208 else
1209 {
1210 /* We may have created entries in the .rela.got and .got sections.
1211 However, if we are not creating the dynamic sections, we will
1212 not actually use these entries. Reset the size of .rela.got
1213 and .got, which will cause it to get stripped from the output
1214 file below. */
1215 s = bfd_get_section_by_name (dynobj, ".rela.got");
1216 if (s != NULL)
1217 s->_raw_size = 0;
1218 s = bfd_get_section_by_name (dynobj, ".got.plt");
1219 if (s != NULL)
1220 s->_raw_size = 0;
1221 s = bfd_get_section_by_name (dynobj, ".got");
1222 if (s != NULL)
1223 s->_raw_size = 0;
1224 }
1225
1226 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1227 relative relocs against symbols defined in a regular object. We
1228 allocated space for them in the check_relocs routine, but we will not
1229 fill them in in the relocate_section routine. */
1230 if (info->shared && info->symbolic)
1231 elf_vax_link_hash_traverse (elf_vax_hash_table (info),
1232 elf_vax_discard_copies,
1233 (PTR) NULL);
1234
1235 /* The check_relocs and adjust_dynamic_symbol entry points have
1236 determined the sizes of the various dynamic sections. Allocate
1237 memory for them. */
1238 plt = false;
1239 relocs = false;
1240 reltext = false;
1241 for (s = dynobj->sections; s != NULL; s = s->next)
1242 {
1243 const char *name;
1244 boolean strip;
1245
1246 if ((s->flags & SEC_LINKER_CREATED) == 0)
1247 continue;
1248
1249 /* It's OK to base decisions on the section name, because none
1250 of the dynobj section names depend upon the input files. */
1251 name = bfd_get_section_name (dynobj, s);
1252
1253 strip = false;
1254
1255 if (strcmp (name, ".plt") == 0)
1256 {
1257 if (s->_raw_size == 0)
1258 {
1259 /* Strip this section if we don't need it; see the
1260 comment below. */
1261 strip = true;
1262 }
1263 else
1264 {
1265 /* Remember whether there is a PLT. */
1266 plt = true;
1267 }
1268 }
1269 else if (strncmp (name, ".rela", 5) == 0)
1270 {
1271 if (s->_raw_size == 0)
1272 {
1273 /* If we don't need this section, strip it from the
1274 output file. This is mostly to handle .rela.bss and
1275 .rela.plt. We must create both sections in
1276 create_dynamic_sections, because they must be created
1277 before the linker maps input sections to output
1278 sections. The linker does that before
1279 adjust_dynamic_symbol is called, and it is that
1280 function which decides whether anything needs to go
1281 into these sections. */
1282 strip = true;
1283 }
1284 else
1285 {
1286 asection *target;
1287
1288 /* Remember whether there are any reloc sections other
1289 than .rela.plt. */
1290 if (strcmp (name, ".rela.plt") != 0)
1291 {
1292 const char *outname;
1293
1294 relocs = true;
1295
1296 /* If this relocation section applies to a read only
1297 section, then we probably need a DT_TEXTREL
1298 entry. .rela.plt is actually associated with
1299 .got.plt, which is never readonly. */
1300 outname = bfd_get_section_name (output_bfd,
1301 s->output_section);
1302 target = bfd_get_section_by_name (output_bfd, outname + 5);
1303 if (target != NULL
1304 && (target->flags & SEC_READONLY) != 0
1305 && (target->flags & SEC_ALLOC) != 0)
1306 reltext = true;
1307 }
1308
1309 /* We use the reloc_count field as a counter if we need
1310 to copy relocs into the output file. */
1311 s->reloc_count = 0;
1312 }
1313 }
1314 else if (strncmp (name, ".got", 4) != 0)
1315 {
1316 /* It's not one of our sections, so don't allocate space. */
1317 continue;
1318 }
1319
1320 if (strip)
1321 {
1322 _bfd_strip_section_from_output (info, s);
1323 continue;
1324 }
1325
1326 /* Allocate memory for the section contents. */
1327 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
1328 if (s->contents == NULL && s->_raw_size != 0)
1329 return false;
1330 }
1331
1332 if (elf_hash_table (info)->dynamic_sections_created)
1333 {
1334 /* Add some entries to the .dynamic section. We fill in the
1335 values later, in elf_vax_finish_dynamic_sections, but we
1336 must add the entries now so that we get the correct size for
1337 the .dynamic section. The DT_DEBUG entry is filled in by the
1338 dynamic linker and used by the debugger. */
1339#define add_dynamic_entry(TAG, VAL) \
1340 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1341
1342 if (!info->shared)
1343 {
1344 if (!add_dynamic_entry (DT_DEBUG, 0))
1345 return false;
1346 }
1347
1348 if (plt)
1349 {
1350 if (!add_dynamic_entry (DT_PLTGOT, 0)
1351 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1352 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1353 || !add_dynamic_entry (DT_JMPREL, 0))
1354 return false;
1355 }
1356
1357 if (relocs)
1358 {
1359 if (!add_dynamic_entry (DT_RELA, 0)
1360 || !add_dynamic_entry (DT_RELASZ, 0)
1361 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1362 return false;
1363 }
1364
1365 if (reltext || (info->flags & DF_TEXTREL) != 0)
1366 {
1367 if (!add_dynamic_entry (DT_TEXTREL, 0))
1368 return false;
1369 }
1370 }
1371#undef add_dynamic_entry
1372
1373 return true;
1374}
1375
1376/* This function is called via elf_vax_link_hash_traverse if we are
1377 creating a shared object with -Bsymbolic. It discards the space
1378 allocated to copy PC relative relocs against symbols which are defined
1379 in regular objects. We allocated space for them in the check_relocs
1380 routine, but we won't fill them in in the relocate_section routine. */
1381
1382/*ARGSUSED*/
1383static boolean
1384elf_vax_discard_copies (h, ignore)
1385 struct elf_vax_link_hash_entry *h;
1386 PTR ignore ATTRIBUTE_UNUSED;
1387{
1388 struct elf_vax_pcrel_relocs_copied *s;
1389
1390 if (h->root.root.type == bfd_link_hash_warning)
1391 h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
1392
1393 /* We only discard relocs for symbols defined in a regular object. */
1394 if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1395 return true;
1396
1397 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1398 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela);
1399
1400 return true;
1401}
1402
1403/* Relocate an VAX ELF section. */
1404
1405static boolean
1406elf_vax_relocate_section (output_bfd, info, input_bfd, input_section,
1407 contents, relocs, local_syms, local_sections)
1408 bfd *output_bfd;
1409 struct bfd_link_info *info;
1410 bfd *input_bfd;
1411 asection *input_section;
1412 bfd_byte *contents;
1413 Elf_Internal_Rela *relocs;
1414 Elf_Internal_Sym *local_syms;
1415 asection **local_sections;
1416{
1417 bfd *dynobj;
1418 Elf_Internal_Shdr *symtab_hdr;
1419 struct elf_link_hash_entry **sym_hashes;
1420 bfd_vma *local_got_offsets;
1421 bfd_vma plt_index;
1422 bfd_vma got_offset;
1423 asection *sgot;
1424 asection *splt;
1425 asection *sgotplt;
1426 asection *sreloc;
1427 Elf_Internal_Rela *rel;
1428 Elf_Internal_Rela *relend;
1429
1430 dynobj = elf_hash_table (info)->dynobj;
1431 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1432 sym_hashes = elf_sym_hashes (input_bfd);
1433 local_got_offsets = elf_local_got_offsets (input_bfd);
1434
1435 sgot = NULL;
1436 splt = NULL;
1437 sgotplt = NULL;
1438 sreloc = NULL;
1439
1440 rel = relocs;
1441 relend = relocs + input_section->reloc_count;
1442 for (; rel < relend; rel++)
1443 {
1444 int r_type;
1445 reloc_howto_type *howto;
1446 unsigned long r_symndx;
1447 struct elf_link_hash_entry *h;
1448 Elf_Internal_Sym *sym;
1449 asection *sec;
1450 bfd_vma relocation;
1451 bfd_reloc_status_type r;
1452
1453 r_type = ELF32_R_TYPE (rel->r_info);
1454 if (r_type < 0 || r_type >= (int) R_VAX_max)
1455 {
1456 bfd_set_error (bfd_error_bad_value);
1457 return false;
1458 }
1459 howto = howto_table + r_type;
1460
1461 r_symndx = ELF32_R_SYM (rel->r_info);
1462
1463 if (info->relocateable)
1464 {
1465 /* This is a relocateable link. We don't have to change
1466 anything, unless the reloc is against a section symbol,
1467 in which case we have to adjust according to where the
1468 section symbol winds up in the output section. */
1469 if (r_symndx < symtab_hdr->sh_info)
1470 {
1471 sym = local_syms + r_symndx;
1472 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1473 {
1474 sec = local_sections[r_symndx];
1475 rel->r_addend += sec->output_offset + sym->st_value;
1476 }
1477 }
1478
1479 continue;
1480 }
1481
1482 /* This is a final link. */
1483 h = NULL;
1484 sym = NULL;
1485 sec = NULL;
1486 if (r_symndx < symtab_hdr->sh_info)
1487 {
1488 sym = local_syms + r_symndx;
1489 sec = local_sections[r_symndx];
1490 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
1491 }
1492 else
1493 {
1494 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1495 while (h->root.type == bfd_link_hash_indirect
1496 || h->root.type == bfd_link_hash_warning)
1497 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1498 if (h->root.type == bfd_link_hash_defined
1499 || h->root.type == bfd_link_hash_defweak)
1500 {
1501 sec = h->root.u.def.section;
1502 if ((r_type == R_VAX_PLT32
1503 && h->plt.offset != (bfd_vma) -1
1504 && elf_hash_table (info)->dynamic_sections_created)
1505 || (r_type == R_VAX_GOT32
1506 && strcmp (h->root.root.string,
1507 "_GLOBAL_OFFSET_TABLE_") != 0
1508 && elf_hash_table (info)->dynamic_sections_created
1509 && (! info->shared
1510 || (! info->symbolic && h->dynindx != -1)
1511 || (h->elf_link_hash_flags
1512 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1513 || (info->shared
1514 && ((! info->symbolic && h->dynindx != -1)
1515 || (h->elf_link_hash_flags
1516 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1517 && ((input_section->flags & SEC_ALLOC) != 0
1518 /* DWARF will emit R_VAX_32 relocations in its
1519 sections against symbols defined externally
1520 in shared libraries. We can't do anything
1521 with them here. */
1522
1523 || ((input_section->flags & SEC_DEBUGGING) != 0
1524 && (h->elf_link_hash_flags
1525 & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
1526 && (r_type == R_VAX_8
1527 || r_type == R_VAX_16
1528 || r_type == R_VAX_32
1529 || r_type == R_VAX_PC8
1530 || r_type == R_VAX_PC16
1531 || r_type == R_VAX_PC32)))
1532 {
1533 /* In these cases, we don't need the relocation
1534 value. We check specially because in some
1535 obscure cases sec->output_section will be NULL. */
1536 relocation = 0;
1537 }
1538 else
1539 relocation = (h->root.u.def.value
1540 + sec->output_section->vma
1541 + sec->output_offset);
1542 }
1543 else if (h->root.type == bfd_link_hash_undefweak)
1544 relocation = 0;
1545 else if (info->shared
1546 && (!info->symbolic || info->allow_shlib_undefined)
1547 && !info->no_undefined
1548 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
1549 relocation = 0;
1550 else
1551 {
1552 if (!(info->callbacks->undefined_symbol
1553 (info, h->root.root.string, input_bfd,
1554 input_section, rel->r_offset,
1555 (!info->shared || info->no_undefined
1556 || ELF_ST_VISIBILITY (h->other)))))
1557 return false;
1558 relocation = 0;
1559 }
1560 }
1561
1562 switch (r_type)
1563 {
1564 case R_VAX_GOT32:
1565 /* Relocation is to the address of the entry for this symbol
1566 in the global offset table. */
1567 if (h != NULL
1568 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1569 break;
1570
1571 /* Relocation is the offset of the entry for this symbol in
1572 the global offset table. */
1573
1574 {
1575 bfd_vma off;
1576
1577 if (!elf_hash_table (info)->dynamic_sections_created
1578 || (h == NULL)
1579 || (info->shared
1580 && info->symbolic
1581 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1582 {
1583 /* This is actually a static link, or it is a -Bsymbolic link
1584 and the symbol is defined locally or there is no symbol.
1585 Change the GOT32 entry to a PC32 entry. */
1586 break;
1587 }
1588
1589 if (sgot == NULL)
1590 {
1591 sgot = bfd_get_section_by_name (dynobj, ".got");
1592 BFD_ASSERT (sgot != NULL);
1593 }
1594
1595 BFD_ASSERT (h != NULL);
1596 off = h->got.offset;
1597 BFD_ASSERT (off != (bfd_vma) -1);
1598
1599 if (info->shared
1600 && h->dynindx == -1
1601 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
1602 {
1603 /* The symbol was forced to be local
1604 because of a version file.. We must initialize
1605 this entry in the global offset table. Since
1606 the offset must always be a multiple of 4, we
1607 use the least significant bit to record whether
1608 we have initialized it already.
1609
1610 When doing a dynamic link, we create a .rela.got
1611 relocation entry to initialize the value. This
1612 is done in the finish_dynamic_symbol routine. */
1613 if ((off & 1) != 0)
1614 off &= ~1;
1615 else
1616 {
1617 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1618 sgot->contents + off);
1619 h->got.offset |= 1;
1620 }
1621 } else {
1622 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1623 }
1624
1625 relocation = sgot->output_offset + off;
1626 /* Neither GOT relocation uses the addend. */
1627 rel->r_addend = 0;
1628
1629 if (r_type == R_VAX_GOT32)
1630 {
1631 /* Change the reference to be indirect */
1632 contents[rel->r_offset - 1] |= 0x10;
1633 relocation += sgot->output_section->vma;
1634 }
1635 }
1636 break;
1637
1638 case R_VAX_PLT32:
1639 /* Relocation is to the entry for this symbol in the
1640 procedure linkage table. */
1641
1642 /* Resolve a PLTxx reloc against a local symbol directly,
1643 without using the procedure linkage table. */
1644 if (h == NULL)
1645 break;
1646
1647 if (h->plt.offset == (bfd_vma) -1
1648 || !elf_hash_table (info)->dynamic_sections_created)
1649 {
1650 /* We didn't make a PLT entry for this symbol. This
1651 happens when statically linking PIC code, or when
1652 using -Bsymbolic. */
1653 break;
1654 }
1655
1656 if (splt == NULL)
1657 {
1658 splt = bfd_get_section_by_name (dynobj, ".plt");
1659 BFD_ASSERT (splt != NULL);
1660 }
1661
1662 if (sgotplt == NULL)
1663 {
1664 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1665 BFD_ASSERT (splt != NULL);
1666 }
1667
1668 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1669
1670 /* Get the offset into the .got table of the entry that
1671 corresponds to this function. Each .got entry is 4 bytes.
1672 The first two are reserved. */
1673 got_offset = (plt_index + 3) * 4;
1674
1675 /* We want the relocate to point into the .got.plt instead
1676 of the plt itself. */
1677 relocation = (sgotplt->output_section->vma
1678 + sgotplt->output_offset
1679 + got_offset);
1680 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1681 if (rel->r_addend == 2)
1682 {
1683 h->plt.offset |= 1;
1684 }
1685 else if (rel->r_addend != 0)
1686 (*_bfd_error_handler)
1687 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1688 bfd_get_filename (input_bfd), rel->r_addend,
1689 h->root.root.string,
1690 bfd_get_section_name (input_bfd, input_section));
1691 rel->r_addend = 0;
1692
1693 break;
1694
1695 case R_VAX_PC8:
1696 case R_VAX_PC16:
1697 case R_VAX_PC32:
1698 if (h == NULL)
1699 break;
1700 /* Fall through. */
1701 case R_VAX_8:
1702 case R_VAX_16:
1703 case R_VAX_32:
1704 if (info->shared
1705 && r_symndx != 0
1706 && (input_section->flags & SEC_ALLOC) != 0
1707 && ((r_type != R_VAX_PC8
1708 && r_type != R_VAX_PC16
1709 && r_type != R_VAX_PC32)
1710 || (!info->symbolic
1711 || (h->elf_link_hash_flags
1712 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1713 {
1714 Elf_Internal_Rela outrel;
1715 boolean skip, relocate;
1716
1717 /* When generating a shared object, these relocations
1718 are copied into the output file to be resolved at run
1719 time. */
1720
1721 if (sreloc == NULL)
1722 {
1723 const char *name;
1724
1725 name = (bfd_elf_string_from_elf_section
1726 (input_bfd,
1727 elf_elfheader (input_bfd)->e_shstrndx,
1728 elf_section_data (input_section)->rel_hdr.sh_name));
1729 if (name == NULL)
1730 return false;
1731
1732 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1733 && strcmp (bfd_get_section_name (input_bfd,
1734 input_section),
1735 name + 5) == 0);
1736
1737 sreloc = bfd_get_section_by_name (dynobj, name);
1738 BFD_ASSERT (sreloc != NULL);
1739 }
1740
1741 skip = false;
1742 relocate = false;
1743
1744 outrel.r_offset =
1745 _bfd_elf_section_offset (output_bfd, info, input_section,
1746 rel->r_offset);
1747 if (outrel.r_offset == (bfd_vma) -1)
1748 skip = true;
1749 if (outrel.r_offset == (bfd_vma) -2)
1750 skip = true, relocate = true;
1751 outrel.r_offset += (input_section->output_section->vma
1752 + input_section->output_offset);
1753
1754 if (skip)
1755 memset (&outrel, 0, sizeof outrel);
1756 /* h->dynindx may be -1 if the symbol was marked to
1757 become local. */
1758 else if (h != NULL
1759 && ((! info->symbolic && h->dynindx != -1)
1760 || (h->elf_link_hash_flags
1761 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1762 {
1763 BFD_ASSERT (h->dynindx != -1);
1764 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1765 outrel.r_addend = relocation + rel->r_addend;
1766 }
1767 else
1768 {
1769 if (r_type == R_VAX_32)
1770 {
1771 relocate = true;
1772 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1773 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1774 &contents[rel->r_offset]) == 0);
1775 outrel.r_addend = relocation + rel->r_addend;
1776 }
1777 else
1778 {
1779 long indx;
1780
1781 if (h == NULL)
1782 sec = local_sections[r_symndx];
1783 else
1784 {
1785 BFD_ASSERT (h->root.type == bfd_link_hash_defined
1786 || (h->root.type
1787 == bfd_link_hash_defweak));
1788 sec = h->root.u.def.section;
1789 }
1790 if (sec != NULL && bfd_is_abs_section (sec))
1791 indx = 0;
1792 else if (sec == NULL || sec->owner == NULL)
1793 {
1794 bfd_set_error (bfd_error_bad_value);
1795 return false;
1796 }
1797 else
1798 {
1799 asection *osec;
1800
1801 osec = sec->output_section;
1802 indx = elf_section_data (osec)->dynindx;
1803 BFD_ASSERT (indx > 0);
1804 }
1805
1806 outrel.r_info = ELF32_R_INFO (indx, r_type);
1807 outrel.r_addend = relocation + rel->r_addend;
1808 }
1809 }
1810
1811 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1812 ".text") != 0 ||
1813 (info->shared
1814 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1815 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1816 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1817 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1818 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1819 {
1820 if (h != NULL)
1821 (*_bfd_error_handler)
1822 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1823 bfd_get_filename (input_bfd), howto->name,
1824 h->root.root.string,
1825 bfd_get_section_name (input_bfd, input_section));
1826 else
1827 (*_bfd_error_handler)
1828 (_("%s: warning: %s relocation to 0x%x from %s section"),
1829 bfd_get_filename (input_bfd), howto->name,
1830 outrel.r_addend,
1831 bfd_get_section_name (input_bfd, input_section));
1832 }
1833 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1834 (((Elf32_External_Rela *)
1835 sreloc->contents)
1836 + sreloc->reloc_count));
1837 ++sreloc->reloc_count;
1838
1839 /* This reloc will be computed at runtime, so there's no
1840 need to do anything now, except for R_VAX_32
1841 relocations that have been turned into
1842 R_VAX_RELATIVE. */
1843 if (!relocate)
1844 continue;
1845 }
1846
1847 break;
1848
1849 case R_VAX_GNU_VTINHERIT:
1850 case R_VAX_GNU_VTENTRY:
1851 /* These are no-ops in the end. */
1852 continue;
1853
1854 default:
1855 break;
1856 }
1857
1858 /* VAX PCREL relocations are from the end of relocation, not the start */
1859 if (howto->pc_relative && howto->pcrel_offset)
1860 {
1861 relocation -= bfd_get_reloc_size(howto);
1862 }
1863
1864 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1865 contents, rel->r_offset,
1866 relocation, rel->r_addend);
1867
1868 if (r != bfd_reloc_ok)
1869 {
1870 switch (r)
1871 {
1872 default:
1873 case bfd_reloc_outofrange:
1874 abort ();
1875 case bfd_reloc_overflow:
1876 {
1877 const char *name;
1878
1879 if (h != NULL)
1880 name = h->root.root.string;
1881 else
1882 {
1883 name = bfd_elf_string_from_elf_section (input_bfd,
1884 symtab_hdr->sh_link,
1885 sym->st_name);
1886 if (name == NULL)
1887 return false;
1888 if (*name == '\0')
1889 name = bfd_section_name (input_bfd, sec);
1890 }
1891 if (!(info->callbacks->reloc_overflow
1892 (info, name, howto->name, (bfd_vma) 0,
1893 input_bfd, input_section, rel->r_offset)))
1894 return false;
1895 }
1896 break;
1897 }
1898 }
1899 }
1900
1901 return true;
1902}
1903
1904/* Finish up dynamic symbol handling. We set the contents of various
1905 dynamic sections here. */
1906
1907static boolean
1908elf_vax_finish_dynamic_symbol (output_bfd, info, h, sym)
1909 bfd *output_bfd;
1910 struct bfd_link_info *info;
1911 struct elf_link_hash_entry *h;
1912 Elf_Internal_Sym *sym;
1913{
1914 bfd *dynobj;
1915
1916 dynobj = elf_hash_table (info)->dynobj;
1917
1918 if (h->plt.offset != (bfd_vma) -1)
1919 {
1920 asection *splt;
1921 asection *sgot;
1922 asection *srela;
1923 bfd_vma plt_index;
1924 bfd_vma got_offset;
1925 bfd_vma addend;
1926 Elf_Internal_Rela rela;
1927
1928 /* This symbol has an entry in the procedure linkage table. Set
1929 it up. */
1930
1931 BFD_ASSERT (h->dynindx != -1);
1932
1933 splt = bfd_get_section_by_name (dynobj, ".plt");
1934 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1935 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1936 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1937
1938 addend = 2 * (h->plt.offset & 1);
1939 h->plt.offset &= ~1;
1940
1941 /* Get the index in the procedure linkage table which
1942 corresponds to this symbol. This is the index of this symbol
1943 in all the symbols for which we are making plt entries. The
1944 first entry in the procedure linkage table is reserved. */
1945 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1946
1947 /* Get the offset into the .got table of the entry that
1948 corresponds to this function. Each .got entry is 4 bytes.
1949 The first two are reserved. */
1950 got_offset = (plt_index + 3) * 4;
1951
1952 /* Fill in the entry in the procedure linkage table. */
1953 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1954 PLT_ENTRY_SIZE);
1955
1956 /* The offset is relative to the first extension word. */
1957 bfd_put_32 (output_bfd,
1958 -(h->plt.offset + 8),
1959 splt->contents + h->plt.offset + 4);
1960
1961 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1962 splt->contents + h->plt.offset + 8);
1963
1964 /* Fill in the entry in the global offset table. */
1965 bfd_put_32 (output_bfd,
1966 (splt->output_section->vma
1967 + splt->output_offset
1968 + h->plt.offset) + addend,
1969 sgot->contents + got_offset);
1970
1971 /* Fill in the entry in the .rela.plt section. */
1972 rela.r_offset = (sgot->output_section->vma
1973 + sgot->output_offset
1974 + got_offset);
1975 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1976 rela.r_addend = addend;
1977 bfd_elf32_swap_reloca_out (output_bfd, &rela,
1978 ((Elf32_External_Rela *) srela->contents
1979 + plt_index));
1980
1981 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1982 {
1983 /* Mark the symbol as undefined, rather than as defined in
1984 the .plt section. Leave the value alone. */
1985 sym->st_shndx = SHN_UNDEF;
1986 }
1987 }
1988
1989 if (h->got.offset != (bfd_vma) -1)
1990 {
1991 asection *sgot;
1992 asection *srela;
1993 Elf_Internal_Rela rela;
1994
1995 /* This symbol has an entry in the global offset table. Set it
1996 up. */
1997
1998 sgot = bfd_get_section_by_name (dynobj, ".got");
1999 srela = bfd_get_section_by_name (dynobj, ".rela.got");
2000 BFD_ASSERT (sgot != NULL && srela != NULL);
2001
2002 rela.r_offset = (sgot->output_section->vma
2003 + sgot->output_offset
2004 + (h->got.offset &~ 1));
2005
2006 /* If the symbol was forced to be local because of a version file
2007 locally we just want to emit a RELATIVE reloc. The entry in
2008 the global offset table will already have been initialized in
2009 the relocate_section function. */
2010 if (info->shared
2011 && h->dynindx == -1
2012 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2013 {
2014 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
2015 }
2016 else
2017 {
2018 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
2019 }
2020 rela.r_addend = bfd_get_signed_32 (output_bfd,
2021 (sgot->contents
2022 + (h->got.offset & ~1)));
2023
2024 bfd_elf32_swap_reloca_out (output_bfd, &rela,
2025 ((Elf32_External_Rela *) srela->contents
2026 + srela->reloc_count));
2027 ++srela->reloc_count;
2028 }
2029
2030 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2031 {
2032 asection *s;
2033 Elf_Internal_Rela rela;
2034
2035 /* This symbol needs a copy reloc. Set it up. */
2036
2037 BFD_ASSERT (h->dynindx != -1
2038 && (h->root.type == bfd_link_hash_defined
2039 || h->root.type == bfd_link_hash_defweak));
2040
2041 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2042 ".rela.bss");
2043 BFD_ASSERT (s != NULL);
2044
2045 rela.r_offset = (h->root.u.def.value
2046 + h->root.u.def.section->output_section->vma
2047 + h->root.u.def.section->output_offset);
2048 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
2049 rela.r_addend = 0;
2050 bfd_elf32_swap_reloca_out (output_bfd, &rela,
2051 ((Elf32_External_Rela *) s->contents
2052 + s->reloc_count));
2053 ++s->reloc_count;
2054 }
2055
2056 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2057 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2058 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2059 sym->st_shndx = SHN_ABS;
2060
2061 return true;
2062}
2063
2064/* Finish up the dynamic sections. */
2065
2066static boolean
2067elf_vax_finish_dynamic_sections (output_bfd, info)
2068 bfd *output_bfd;
2069 struct bfd_link_info *info;
2070{
2071 bfd *dynobj;
2072 asection *sgot;
2073 asection *sdyn;
2074
2075 dynobj = elf_hash_table (info)->dynobj;
2076
2077 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2078 BFD_ASSERT (sgot != NULL);
2079 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2080
2081 if (elf_hash_table (info)->dynamic_sections_created)
2082 {
2083 asection *splt;
2084 Elf32_External_Dyn *dyncon, *dynconend;
2085
2086 splt = bfd_get_section_by_name (dynobj, ".plt");
2087 BFD_ASSERT (splt != NULL && sdyn != NULL);
2088
2089 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2090 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2091 for (; dyncon < dynconend; dyncon++)
2092 {
2093 Elf_Internal_Dyn dyn;
2094 const char *name;
2095 asection *s;
2096
2097 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2098
2099 switch (dyn.d_tag)
2100 {
2101 default:
2102 break;
2103
2104 case DT_PLTGOT:
2105 name = ".got";
2106 goto get_vma;
2107 case DT_JMPREL:
2108 name = ".rela.plt";
2109 get_vma:
2110 s = bfd_get_section_by_name (output_bfd, name);
2111 BFD_ASSERT (s != NULL);
2112 dyn.d_un.d_ptr = s->vma;
2113 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2114 break;
2115
2116 case DT_PLTRELSZ:
2117 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2118 BFD_ASSERT (s != NULL);
2119 if (s->_cooked_size != 0)
2120 dyn.d_un.d_val = s->_cooked_size;
2121 else
2122 dyn.d_un.d_val = s->_raw_size;
2123 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2124 break;
2125
2126 case DT_RELASZ:
2127 /* The procedure linkage table relocs (DT_JMPREL) should
2128 not be included in the overall relocs (DT_RELA).
2129 Therefore, we override the DT_RELASZ entry here to
2130 make it not include the JMPREL relocs. Since the
2131 linker script arranges for .rela.plt to follow all
2132 other relocation sections, we don't have to worry
2133 about changing the DT_RELA entry. */
2134 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2135 if (s != NULL)
2136 {
2137 if (s->_cooked_size != 0)
2138 dyn.d_un.d_val -= s->_cooked_size;
2139 else
2140 dyn.d_un.d_val -= s->_raw_size;
2141 }
2142 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2143 break;
2144 }
2145 }
2146
2147 /* Fill in the first entry in the procedure linkage table. */
2148 if (splt->_raw_size > 0)
2149 {
2150 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2151 bfd_put_32 (output_bfd,
2152 (sgot->output_section->vma
2153 + sgot->output_offset + 4
2154 - (splt->output_section->vma + 6)),
2155 splt->contents + 2);
2156 bfd_put_32 (output_bfd,
2157 (sgot->output_section->vma
2158 + sgot->output_offset + 8
2159 - (splt->output_section->vma + 12)),
2160 splt->contents + 8);
2161 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2162 = PLT_ENTRY_SIZE;
2163 }
2164 }
2165
2166 /* Fill in the first three entries in the global offset table. */
2167 if (sgot->_raw_size > 0)
2168 {
2169 if (sdyn == NULL)
2170 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2171 else
2172 bfd_put_32 (output_bfd,
2173 sdyn->output_section->vma + sdyn->output_offset,
2174 sgot->contents);
2175 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2176 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2177 }
2178
2179 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2180
2181 return true;
2182}
2183
2184#define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2185#define TARGET_LITTLE_NAME "elf32-vax"
2186#define ELF_MACHINE_CODE EM_VAX
2187#define ELF_MAXPAGESIZE 0x1000
2188
2189#define elf_backend_create_dynamic_sections \
2190 _bfd_elf_create_dynamic_sections
2191#define bfd_elf32_bfd_link_hash_table_create \
2192 elf_vax_link_hash_table_create
2193#define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
2194
2195#define elf_backend_check_relocs elf_vax_check_relocs
2196#define elf_backend_adjust_dynamic_symbol \
2197 elf_vax_adjust_dynamic_symbol
2198#define elf_backend_size_dynamic_sections \
2199 elf_vax_size_dynamic_sections
2200#define elf_backend_relocate_section elf_vax_relocate_section
2201#define elf_backend_finish_dynamic_symbol \
2202 elf_vax_finish_dynamic_symbol
2203#define elf_backend_finish_dynamic_sections \
2204 elf_vax_finish_dynamic_sections
2205#define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2206#define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2207#define bfd_elf32_bfd_merge_private_bfd_data \
2208 elf32_vax_merge_private_bfd_data
2209#define bfd_elf32_bfd_set_private_flags \
2210 elf32_vax_set_private_flags
2211#define bfd_elf32_bfd_print_private_bfd_data \
2212 elf32_vax_print_private_bfd_data
2213
2214#define elf_backend_can_gc_sections 1
2215#define elf_backend_want_got_plt 1
2216#define elf_backend_plt_readonly 1
2217#define elf_backend_want_plt_sym 0
2218#define elf_backend_got_header_size 16
2219
2220#include "elf32-target.h"
GDB Binutils - Deliverables
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