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Add translations for various sub-directories
[binutils-gdb.git] / bfd / elf32-vax.c
blob9d1fee86797bf41dfba34dfc2fe741fae3da7d66
1 /* VAX series support for 32-bit ELF
2 Copyright (C) 1993-2025 Free Software Foundation, Inc.
3 Contributed by Matt Thomas <matt@3am-software.com>.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/vax.h"
28
29 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
30 static bool rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
31 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
32 struct bfd_hash_table *,
33 const char *);
34 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
35 static bool elf_vax_check_relocs (bfd *, struct bfd_link_info *,
36 asection *, const Elf_Internal_Rela *);
37 static bool elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
38 struct elf_link_hash_entry *);
39 static int elf_vax_relocate_section (bfd *, struct bfd_link_info *,
40 bfd *, asection *, bfd_byte *,
41 Elf_Internal_Rela *,
42 Elf_Internal_Sym *, asection **);
43 static bool elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
44 struct elf_link_hash_entry *,
45 Elf_Internal_Sym *);
46 static bool elf_vax_finish_dynamic_sections (bfd *, struct bfd_link_info *);
47 static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *,
48 const arelent *);
49
50 static bool elf32_vax_set_private_flags (bfd *, flagword);
51 static bool elf32_vax_print_private_bfd_data (bfd *, void *);
52
53 static reloc_howto_type howto_table[] = {
54 HOWTO (R_VAX_NONE, /* type */
55 0, /* rightshift */
56 0, /* size */
57 0, /* bitsize */
58 false, /* pc_relative */
59 0, /* bitpos */
60 complain_overflow_dont, /* complain_on_overflow */
61 bfd_elf_generic_reloc, /* special_function */
62 "R_VAX_NONE", /* name */
63 false, /* partial_inplace */
64 0, /* src_mask */
65 0x00000000, /* dst_mask */
66 false), /* pcrel_offset */
67
68 HOWTO (R_VAX_32, /* type */
69 0, /* rightshift */
70 4, /* size */
71 32, /* bitsize */
72 false, /* pc_relative */
73 0, /* bitpos */
74 complain_overflow_bitfield, /* complain_on_overflow */
75 bfd_elf_generic_reloc, /* special_function */
76 "R_VAX_32", /* name */
77 false, /* partial_inplace */
78 0, /* src_mask */
79 0xffffffff, /* dst_mask */
80 false), /* pcrel_offset */
81
82 HOWTO (R_VAX_16, /* type */
83 0, /* rightshift */
84 2, /* size */
85 16, /* bitsize */
86 false, /* pc_relative */
87 0, /* bitpos */
88 complain_overflow_bitfield, /* complain_on_overflow */
89 bfd_elf_generic_reloc, /* special_function */
90 "R_VAX_16", /* name */
91 false, /* partial_inplace */
92 0, /* src_mask */
93 0x0000ffff, /* dst_mask */
94 false), /* pcrel_offset */
95
96 HOWTO (R_VAX_8, /* type */
97 0, /* rightshift */
98 1, /* size */
99 8, /* bitsize */
100 false, /* pc_relative */
101 0, /* bitpos */
102 complain_overflow_bitfield, /* complain_on_overflow */
103 bfd_elf_generic_reloc, /* special_function */
104 "R_VAX_8", /* name */
105 false, /* partial_inplace */
106 0, /* src_mask */
107 0x000000ff, /* dst_mask */
108 false), /* pcrel_offset */
109
110 HOWTO (R_VAX_PC32, /* type */
111 0, /* rightshift */
112 4, /* size */
113 32, /* bitsize */
114 true, /* pc_relative */
115 0, /* bitpos */
116 complain_overflow_bitfield, /* complain_on_overflow */
117 bfd_elf_generic_reloc, /* special_function */
118 "R_VAX_PC32", /* name */
119 false, /* partial_inplace */
120 0, /* src_mask */
121 0xffffffff, /* dst_mask */
122 true), /* pcrel_offset */
123
124 HOWTO (R_VAX_PC16, /* type */
125 0, /* rightshift */
126 2, /* size */
127 16, /* bitsize */
128 true, /* pc_relative */
129 0, /* bitpos */
130 complain_overflow_signed, /* complain_on_overflow */
131 bfd_elf_generic_reloc, /* special_function */
132 "R_VAX_PC16", /* name */
133 false, /* partial_inplace */
134 0, /* src_mask */
135 0x0000ffff, /* dst_mask */
136 true), /* pcrel_offset */
137
138 HOWTO (R_VAX_PC8, /* type */
139 0, /* rightshift */
140 1, /* size */
141 8, /* bitsize */
142 true, /* pc_relative */
143 0, /* bitpos */
144 complain_overflow_signed, /* complain_on_overflow */
145 bfd_elf_generic_reloc, /* special_function */
146 "R_VAX_PC8", /* name */
147 false, /* partial_inplace */
148 0, /* src_mask */
149 0x000000ff, /* dst_mask */
150 true), /* pcrel_offset */
151
152 HOWTO (R_VAX_GOT32, /* type */
153 0, /* rightshift */
154 4, /* size */
155 32, /* bitsize */
156 true, /* pc_relative */
157 0, /* bitpos */
158 complain_overflow_bitfield, /* complain_on_overflow */
159 bfd_elf_generic_reloc, /* special_function */
160 "R_VAX_GOT32", /* name */
161 false, /* partial_inplace */
162 0, /* src_mask */
163 0xffffffff, /* dst_mask */
164 true), /* pcrel_offset */
165
166 EMPTY_HOWTO (-1),
167 EMPTY_HOWTO (-1),
168 EMPTY_HOWTO (-1),
169 EMPTY_HOWTO (-1),
170 EMPTY_HOWTO (-1),
171
172 HOWTO (R_VAX_PLT32, /* type */
173 0, /* rightshift */
174 4, /* size */
175 32, /* bitsize */
176 true, /* pc_relative */
177 0, /* bitpos */
178 complain_overflow_bitfield, /* complain_on_overflow */
179 bfd_elf_generic_reloc, /* special_function */
180 "R_VAX_PLT32", /* name */
181 false, /* partial_inplace */
182 0, /* src_mask */
183 0xffffffff, /* dst_mask */
184 true), /* pcrel_offset */
185
186 EMPTY_HOWTO (-1),
187 EMPTY_HOWTO (-1),
188 EMPTY_HOWTO (-1),
189 EMPTY_HOWTO (-1),
190 EMPTY_HOWTO (-1),
191
192 HOWTO (R_VAX_COPY, /* type */
193 0, /* rightshift */
194 0, /* size */
195 0, /* bitsize */
196 false, /* pc_relative */
197 0, /* bitpos */
198 complain_overflow_dont, /* complain_on_overflow */
199 bfd_elf_generic_reloc, /* special_function */
200 "R_VAX_COPY", /* name */
201 false, /* partial_inplace */
202 0, /* src_mask */
203 0xffffffff, /* dst_mask */
204 false), /* pcrel_offset */
205
206 HOWTO (R_VAX_GLOB_DAT, /* type */
207 0, /* rightshift */
208 4, /* size */
209 32, /* bitsize */
210 false, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_dont, /* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_VAX_GLOB_DAT", /* name */
215 false, /* partial_inplace */
216 0, /* src_mask */
217 0xffffffff, /* dst_mask */
218 false), /* pcrel_offset */
219
220 HOWTO (R_VAX_JMP_SLOT, /* type */
221 0, /* rightshift */
222 4, /* size */
223 32, /* bitsize */
224 false, /* pc_relative */
225 0, /* bitpos */
226 complain_overflow_dont, /* complain_on_overflow */
227 bfd_elf_generic_reloc, /* special_function */
228 "R_VAX_JMP_SLOT", /* name */
229 false, /* partial_inplace */
230 0, /* src_mask */
231 0xffffffff, /* dst_mask */
232 false), /* pcrel_offset */
233
234 HOWTO (R_VAX_RELATIVE, /* type */
235 0, /* rightshift */
236 4, /* size */
237 32, /* bitsize */
238 false, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_dont, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_VAX_RELATIVE", /* name */
243 false, /* partial_inplace */
244 0, /* src_mask */
245 0xffffffff, /* dst_mask */
246 false), /* pcrel_offset */
247
248 /* GNU extension to record C++ vtable hierarchy */
249 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
250 0, /* rightshift */
251 4, /* size */
252 0, /* bitsize */
253 false, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont, /* complain_on_overflow */
256 NULL, /* special_function */
257 "R_VAX_GNU_VTINHERIT", /* name */
258 false, /* partial_inplace */
259 0, /* src_mask */
260 0, /* dst_mask */
261 false), /* pcrel_offset */
262
263 /* GNU extension to record C++ vtable member usage */
264 HOWTO (R_VAX_GNU_VTENTRY, /* type */
265 0, /* rightshift */
266 4, /* size */
267 0, /* bitsize */
268 false, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
272 "R_VAX_GNU_VTENTRY", /* name */
273 false, /* partial_inplace */
274 0, /* src_mask */
275 0, /* dst_mask */
276 false), /* pcrel_offset */
277 };
278
279 static bool
280 rtype_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
281 {
282 unsigned int r_type;
283
284 r_type = ELF32_R_TYPE (dst->r_info);
285 if (r_type >= R_VAX_max)
286 {
287 /* xgettext:c-format */
288 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
289 abfd, r_type);
290 bfd_set_error (bfd_error_bad_value);
291 return false;
292 }
293 cache_ptr->howto = &howto_table[r_type];
294 return true;
295 }
296
297 #define elf_info_to_howto rtype_to_howto
298
299 static const struct
300 {
301 bfd_reloc_code_real_type bfd_val;
302 int elf_val;
303 } reloc_map[] = {
304 { BFD_RELOC_NONE, R_VAX_NONE },
305 { BFD_RELOC_32, R_VAX_32 },
306 { BFD_RELOC_16, R_VAX_16 },
307 { BFD_RELOC_8, R_VAX_8 },
308 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
309 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
310 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
311 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
312 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
313 { BFD_RELOC_NONE, R_VAX_COPY },
314 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
315 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
316 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
317 { BFD_RELOC_CTOR, R_VAX_32 },
318 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
319 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
320 };
321
322 static reloc_howto_type *
323 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
324 {
325 unsigned int i;
326 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
327 {
328 if (reloc_map[i].bfd_val == code)
329 return &howto_table[reloc_map[i].elf_val];
330 }
331 return 0;
332 }
333
334 static reloc_howto_type *
335 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
336 const char *r_name)
337 {
338 unsigned int i;
339
340 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
341 if (howto_table[i].name != NULL
342 && strcasecmp (howto_table[i].name, r_name) == 0)
343 return &howto_table[i];
344
345 return NULL;
346 }
347
348 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
349 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
350 #define ELF_ARCH bfd_arch_vax
351 /* end code generated by elf.el */
352 \f
353 /* Functions for the VAX ELF linker. */
354
355 /* The name of the dynamic interpreter. This is put in the .interp
356 section. */
357
358 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
359
360 /* The size in bytes of an entry in the procedure linkage table. */
361
362 #define PLT_ENTRY_SIZE 12
363
364 /* The first entry in a procedure linkage table looks like this. See
365 the SVR4 ABI VAX supplement to see how this works. */
366
367 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
368 {
369 0xdd, 0xef, /* pushl l^ */
370 0, 0, 0, 0, /* offset to .plt.got + 4 */
371 0x17, 0xff, /* jmp @L^(pc) */
372 0, 0, 0, 0, /* offset to .plt.got + 8 */
373 };
374
375 /* Subsequent entries in a procedure linkage table look like this. */
376
377 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
378 {
379 0xfc, 0x0f, /* .word ^M<r11:r2> */
380 0x16, 0xef, /* jsb L^(pc) */
381 0, 0, 0, 0, /* replaced with offset to start of .plt */
382 0, 0, 0, 0, /* index into .rela.plt */
383 };
384
385 /* The VAX linker needs to keep track of the number of relocs that it
386 decides to copy in check_relocs for each symbol. This is so that it
387 can discard PC relative relocs if it doesn't need them when linking
388 with -Bsymbolic. We store the information in a field extending the
389 regular ELF linker hash table. */
390
391 /* This structure keeps track of the number of PC relative relocs we have
392 copied for a given symbol. */
393
394 struct elf_vax_pcrel_relocs_copied
395 {
396 /* Next section. */
397 struct elf_vax_pcrel_relocs_copied *next;
398 /* A section in dynobj. */
399 asection *section;
400 /* Number of relocs copied in this section. */
401 bfd_size_type count;
402 };
403
404 /* VAX ELF linker hash entry. */
405
406 struct elf_vax_link_hash_entry
407 {
408 struct elf_link_hash_entry root;
409
410 /* Number of PC relative relocs copied for this symbol. */
411 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
412
413 bfd_vma got_addend;
414 };
415
416 /* Declare this now that the above structures are defined. */
417
418 static bool elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
419 void *);
420
421 /* Declare this now that the above structures are defined. */
422
423 static bool elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
424 void *);
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), \
431 (bool (*) (struct elf_link_hash_entry *, void *)) (func), \
432 (info)))
433
434 /* Create an entry in an VAX ELF linker hash table. */
435
436 static struct bfd_hash_entry *
437 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
438 struct bfd_hash_table *table,
439 const char *string)
440 {
441 struct elf_vax_link_hash_entry *ret =
442 (struct elf_vax_link_hash_entry *) entry;
443
444 /* Allocate the structure if it has not already been allocated by a
445 subclass. */
446 if (ret == NULL)
447 ret = ((struct elf_vax_link_hash_entry *)
448 bfd_hash_allocate (table,
449 sizeof (struct elf_vax_link_hash_entry)));
450 if (ret == NULL)
451 return (struct bfd_hash_entry *) ret;
452
453 /* Call the allocation method of the superclass. */
454 ret = ((struct elf_vax_link_hash_entry *)
455 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
456 table, string));
457 if (ret != NULL)
458 {
459 ret->pcrel_relocs_copied = NULL;
460 }
461
462 return (struct bfd_hash_entry *) ret;
463 }
464
465 /* Create an VAX ELF linker hash table. */
466
467 static struct bfd_link_hash_table *
468 elf_vax_link_hash_table_create (bfd *abfd)
469 {
470 struct elf_link_hash_table *ret;
471 size_t amt = sizeof (struct elf_link_hash_table);
472
473 ret = bfd_zmalloc (amt);
474 if (ret == NULL)
475 return NULL;
476
477 if (!_bfd_elf_link_hash_table_init (ret, abfd,
478 elf_vax_link_hash_newfunc,
479 sizeof (struct elf_vax_link_hash_entry)))
480 {
481 free (ret);
482 return NULL;
483 }
484
485 return &ret->root;
486 }
487
488 /* Keep vax-specific flags in the ELF header */
489 static bool
490 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
491 {
492 elf_elfheader (abfd)->e_flags = flags;
493 elf_flags_init (abfd) = true;
494 return true;
495 }
496
497 /* Merge backend specific data from an object file to the output
498 object file when linking. */
499 static bool
500 elf32_vax_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
501 {
502 bfd *obfd = info->output_bfd;
503 flagword in_flags;
504
505 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
506 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
507 return true;
508
509 in_flags = elf_elfheader (ibfd)->e_flags;
510
511 if (!elf_flags_init (obfd))
512 {
513 elf_flags_init (obfd) = true;
514 elf_elfheader (obfd)->e_flags = in_flags;
515 }
516
517 return true;
518 }
519
520 /* Display the flags field */
521 static bool
522 elf32_vax_print_private_bfd_data (bfd *abfd, void * ptr)
523 {
524 FILE *file = (FILE *) ptr;
525
526 BFD_ASSERT (abfd != NULL && ptr != NULL);
527
528 /* Print normal ELF private data. */
529 _bfd_elf_print_private_bfd_data (abfd, ptr);
530
531 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
532
533 /* xgettext:c-format */
534 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
535
536 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
537 fprintf (file, _(" [nonpic]"));
538
539 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
540 fprintf (file, _(" [d-float]"));
541
542 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
543 fprintf (file, _(" [g-float]"));
544
545 fputc ('\n', file);
546
547 return true;
548 }
549 /* Look through the relocs for a section during the first phase, and
550 allocate space in the global offset table or procedure linkage
551 table. */
552
553 static bool
554 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
555 const Elf_Internal_Rela *relocs)
556 {
557 bfd *dynobj;
558 Elf_Internal_Shdr *symtab_hdr;
559 struct elf_link_hash_entry **sym_hashes;
560 const Elf_Internal_Rela *rel;
561 const Elf_Internal_Rela *rel_end;
562 asection *sreloc;
563
564 if (bfd_link_relocatable (info))
565 return true;
566
567 dynobj = elf_hash_table (info)->dynobj;
568 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
569 sym_hashes = elf_sym_hashes (abfd);
570
571 sreloc = NULL;
572
573 rel_end = relocs + sec->reloc_count;
574 for (rel = relocs; rel < rel_end; rel++)
575 {
576 unsigned long r_symndx;
577 struct elf_link_hash_entry *h;
578
579 r_symndx = ELF32_R_SYM (rel->r_info);
580
581 if (r_symndx < symtab_hdr->sh_info)
582 h = NULL;
583 else
584 {
585 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
586 while (h->root.type == bfd_link_hash_indirect
587 || h->root.type == bfd_link_hash_warning)
588 h = (struct elf_link_hash_entry *) h->root.u.i.link;
589 }
590
591 switch (ELF32_R_TYPE (rel->r_info))
592 {
593 case R_VAX_GOT32:
594 BFD_ASSERT (h != NULL);
595
596 /* If this is a local symbol, we resolve it directly without
597 creating a global offset table entry. */
598 if (SYMBOL_REFERENCES_LOCAL (info, h)
599 || h == elf_hash_table (info)->hgot
600 || h == elf_hash_table (info)->hplt)
601 break;
602
603 /* This symbol requires a global offset table entry. */
604
605 if (dynobj == NULL)
606 {
607 /* Create the .got section. */
608 elf_hash_table (info)->dynobj = dynobj = abfd;
609 if (!_bfd_elf_create_got_section (dynobj, info))
610 return false;
611 }
612
613 if (h != NULL)
614 {
615 struct elf_vax_link_hash_entry *eh;
616
617 eh = (struct elf_vax_link_hash_entry *) h;
618 if (h->got.refcount == -1)
619 {
620 h->got.refcount = 1;
621 eh->got_addend = rel->r_addend;
622 }
623 else
624 {
625 h->got.refcount++;
626 if (eh->got_addend != (bfd_vma) rel->r_addend)
627 _bfd_error_handler
628 /* xgettext:c-format */
629 (_("%pB: warning: GOT addend of %" PRId64 " to `%s' does"
630 " not match previous GOT addend of %" PRId64),
631 abfd, (int64_t) rel->r_addend, h->root.root.string,
632 (int64_t) eh->got_addend);
633
634 }
635 }
636 break;
637
638 case R_VAX_PLT32:
639 /* This symbol requires a procedure linkage table entry. We
640 actually build the entry in adjust_dynamic_symbol,
641 because this might be a case of linking PIC code which is
642 never referenced by a dynamic object, in which case we
643 don't need to generate a procedure linkage table entry
644 after all. */
645 BFD_ASSERT (h != NULL);
646
647 /* If this is a local symbol, we resolve it directly without
648 creating a procedure linkage table entry. */
649 if (h->forced_local)
650 break;
651
652 h->needs_plt = 1;
653 if (h->plt.refcount == -1)
654 h->plt.refcount = 1;
655 else
656 h->plt.refcount++;
657 break;
658
659 case R_VAX_PC8:
660 case R_VAX_PC16:
661 case R_VAX_PC32:
662 /* If we are creating a shared library and this is not a local
663 symbol, we need to copy the reloc into the shared library.
664 However when linking with -Bsymbolic and this is a global
665 symbol which is defined in an object we are including in the
666 link (i.e., DEF_REGULAR is set), then we can resolve the
667 reloc directly. At this point we have not seen all the input
668 files, so it is possible that DEF_REGULAR is not set now but
669 will be set later (it is never cleared). We account for that
670 possibility below by storing information in the
671 pcrel_relocs_copied field of the hash table entry. */
672 if (!(bfd_link_pic (info)
673 && (sec->flags & SEC_ALLOC) != 0
674 && h != NULL
675 && (!info->symbolic
676 || !h->def_regular)))
677 {
678 if (h != NULL
679 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
680 && !h->forced_local)
681 {
682 /* Make sure a plt entry is created for this symbol if
683 it turns out to be a function defined by a dynamic
684 object. */
685 if (h->plt.refcount == -1)
686 h->plt.refcount = 1;
687 else
688 h->plt.refcount++;
689 }
690 break;
691 }
692 /* If this is a local symbol, we can resolve it directly. */
693 if (h != NULL
694 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
695 || h->forced_local))
696 break;
697
698 /* Fall through. */
699 case R_VAX_8:
700 case R_VAX_16:
701 case R_VAX_32:
702 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
703 {
704 /* Make sure a plt entry is created for this symbol if it
705 turns out to be a function defined by a dynamic object. */
706 if (h->plt.refcount == -1)
707 h->plt.refcount = 1;
708 else
709 h->plt.refcount++;
710 }
711
712 /* Non-GOT reference may need a copy reloc in executable or
713 a dynamic reloc in shared library. */
714 if (h != NULL)
715 h->non_got_ref = 1;
716
717 /* If we are creating a shared library, we need to copy the
718 reloc into the shared library. */
719 if (bfd_link_pic (info)
720 && (sec->flags & SEC_ALLOC) != 0)
721 {
722 /* When creating a shared object, we must copy these
723 reloc types into the output file. We create a reloc
724 section in dynobj and make room for this reloc. */
725 if (sreloc == NULL)
726 {
727 sreloc = _bfd_elf_make_dynamic_reloc_section
728 (sec, dynobj, 2, abfd, /*rela?*/ true);
729
730 if (sreloc == NULL)
731 return false;
732
733 if (sec->flags & SEC_READONLY)
734 info->flags |= DF_TEXTREL;
735 }
736
737 sreloc->size += sizeof (Elf32_External_Rela);
738
739 /* If we are linking with -Bsymbolic, we count the number of
740 PC relative relocations we have entered for this symbol,
741 so that we can discard them again if the symbol is later
742 defined by a regular object. Note that this function is
743 only called if we are using a vaxelf linker hash table,
744 which means that h is really a pointer to an
745 elf_vax_link_hash_entry. */
746 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
747 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
748 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
749 && info->symbolic)
750 {
751 struct elf_vax_link_hash_entry *eh;
752 struct elf_vax_pcrel_relocs_copied *p;
753
754 eh = (struct elf_vax_link_hash_entry *) h;
755
756 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
757 if (p->section == sreloc)
758 break;
759
760 if (p == NULL)
761 {
762 p = ((struct elf_vax_pcrel_relocs_copied *)
763 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
764 if (p == NULL)
765 return false;
766 p->next = eh->pcrel_relocs_copied;
767 eh->pcrel_relocs_copied = p;
768 p->section = sreloc;
769 p->count = 0;
770 }
771
772 ++p->count;
773 }
774 }
775
776 break;
777
778 /* This relocation describes the C++ object vtable hierarchy.
779 Reconstruct it for later use during GC. */
780 case R_VAX_GNU_VTINHERIT:
781 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
782 return false;
783 break;
784
785 /* This relocation describes which C++ vtable entries are actually
786 used. Record for later use during GC. */
787 case R_VAX_GNU_VTENTRY:
788 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
789 return false;
790 break;
791
792 default:
793 break;
794 }
795 }
796
797 return true;
798 }
799
800 /* Return the section that should be marked against GC for a given
801 relocation. */
802
803 static asection *
804 elf_vax_gc_mark_hook (asection *sec,
805 struct bfd_link_info *info,
806 Elf_Internal_Rela *rel,
807 struct elf_link_hash_entry *h,
808 Elf_Internal_Sym *sym)
809 {
810 if (h != NULL)
811 switch (ELF32_R_TYPE (rel->r_info))
812 {
813 case R_VAX_GNU_VTINHERIT:
814 case R_VAX_GNU_VTENTRY:
815 return NULL;
816 }
817
818 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
819 }
820
821 /* Adjust a symbol defined by a dynamic object and referenced by a
822 regular object. The current definition is in some section of the
823 dynamic object, but we're not including those sections. We have to
824 change the definition to something the rest of the link can
825 understand. */
826
827 static bool
828 elf_vax_adjust_dynamic_symbol (struct bfd_link_info *info,
829 struct elf_link_hash_entry *h)
830 {
831 bfd *dynobj;
832 asection *s;
833
834 dynobj = elf_hash_table (info)->dynobj;
835
836 /* Make sure we know what is going on here. */
837 BFD_ASSERT (dynobj != NULL
838 && (h->needs_plt
839 || h->is_weakalias
840 || (h->def_dynamic
841 && h->ref_regular
842 && !h->def_regular)));
843
844 /* If this is a function, put it in the procedure linkage table. We
845 will fill in the contents of the procedure linkage table later,
846 when we know the address of the .got section. */
847 if (h->type == STT_FUNC
848 || h->needs_plt)
849 {
850 if (h->plt.refcount <= 0
851 || SYMBOL_CALLS_LOCAL (info, h)
852 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
853 && h->root.type == bfd_link_hash_undefweak))
854 {
855 /* This case can occur if we saw a PLTxx reloc in an input
856 file, but the symbol was never referred to by a dynamic
857 object, or if all references were garbage collected. In
858 such a case, we don't actually need to build a procedure
859 linkage table, and we can just do a PCxx reloc instead. */
860 h->plt.offset = (bfd_vma) -1;
861 h->needs_plt = 0;
862 return true;
863 }
864
865 s = elf_hash_table (info)->splt;
866 BFD_ASSERT (s != NULL);
867
868 /* If this is the first .plt entry, make room for the special
869 first entry. */
870 if (s->size == 0)
871 {
872 s->size += PLT_ENTRY_SIZE;
873 }
874
875 /* If this symbol is not defined in a regular file, and we are
876 not generating a shared library, then set the symbol to this
877 location in the .plt. This is required to make function
878 pointers compare as equal between the normal executable and
879 the shared library. */
880 if (!bfd_link_pic (info)
881 && !h->def_regular)
882 {
883 h->root.u.def.section = s;
884 h->root.u.def.value = s->size;
885 }
886
887 h->plt.offset = s->size;
888
889 /* Make room for this entry. */
890 s->size += PLT_ENTRY_SIZE;
891
892 /* We also need to make an entry in the .got.plt section, which
893 will be placed in the .got section by the linker script. */
894
895 s = elf_hash_table (info)->sgotplt;
896 BFD_ASSERT (s != NULL);
897 s->size += 4;
898
899 /* We also need to make an entry in the .rela.plt section. */
900
901 s = elf_hash_table (info)->srelplt;
902 BFD_ASSERT (s != NULL);
903 s->size += sizeof (Elf32_External_Rela);
904
905 return true;
906 }
907
908 /* Reinitialize the plt offset now that it is not used as a reference
909 count any more. */
910 h->plt.offset = (bfd_vma) -1;
911
912 /* If this is a weak symbol, and there is a real definition, the
913 processor independent code will have arranged for us to see the
914 real definition first, and we can just use the same value. */
915 if (h->is_weakalias)
916 {
917 struct elf_link_hash_entry *def = weakdef (h);
918 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
919 h->root.u.def.section = def->root.u.def.section;
920 h->root.u.def.value = def->root.u.def.value;
921 return true;
922 }
923
924 /* This is a reference to a symbol defined by a dynamic object which
925 is not a function. */
926
927 /* If we are creating a shared library, we must presume that the
928 only references to the symbol are via the global offset table.
929 For such cases we need not do anything here; the relocations will
930 be handled correctly by relocate_section. */
931 if (bfd_link_pic (info))
932 return true;
933
934 /* If there are no references to this symbol that do not use the
935 GOT relocation, we don't need to generate a copy reloc. */
936 if (!h->non_got_ref)
937 return true;
938
939 /* We must allocate the symbol in our .dynbss section, which will
940 become part of the .bss section of the executable. There will be
941 an entry for this symbol in the .dynsym section. The dynamic
942 object will contain position independent code, so all references
943 from the dynamic object to this symbol will go through the global
944 offset table. The dynamic linker will use the .dynsym entry to
945 determine the address it must put in the global offset table, so
946 both the dynamic object and the regular object will refer to the
947 same memory location for the variable. */
948
949 s = bfd_get_linker_section (dynobj, ".dynbss");
950 BFD_ASSERT (s != NULL);
951
952 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
953 copy the initial value out of the dynamic object and into the
954 runtime process image. We need to remember the offset into the
955 .rela.bss section we are going to use. */
956 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
957 {
958 asection *srel;
959
960 srel = bfd_get_linker_section (dynobj, ".rela.bss");
961 BFD_ASSERT (srel != NULL);
962 srel->size += sizeof (Elf32_External_Rela);
963 h->needs_copy = 1;
964 }
965
966 return _bfd_elf_adjust_dynamic_copy (info, h, s);
967 }
968
969 /* This function is called via elf_link_hash_traverse. It resets GOT
970 and PLT (.GOT) reference counts back to -1 so normal PC32 relocation
971 will be done. */
972
973 static bool
974 elf_vax_discard_got_entries (struct elf_link_hash_entry *h,
975 void *infoptr ATTRIBUTE_UNUSED)
976 {
977 h->got.refcount = -1;
978 h->plt.refcount = -1;
979
980 return true;
981 }
982
983 /* Discard unused dynamic data if this is a static link. */
984
985 static bool
986 elf_vax_early_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
987 struct bfd_link_info *info)
988 {
989 bfd *dynobj;
990 asection *s;
991
992 dynobj = elf_hash_table (info)->dynobj;
993
994 if (dynobj && !elf_hash_table (info)->dynamic_sections_created)
995 {
996 /* We may have created entries in the .rela.got and .got sections.
997 However, if we are not creating the dynamic sections, we will
998 not actually use these entries. Reset the size of .rela.got
999 and .got, which will cause them to get stripped from the output
1000 file below. */
1001 s = elf_hash_table (info)->srelgot;
1002 if (s != NULL)
1003 s->size = 0;
1004 s = elf_hash_table (info)->sgotplt;
1005 if (s != NULL)
1006 s->size = 0;
1007 s = elf_hash_table (info)->sgot;
1008 if (s != NULL)
1009 s->size = 0;
1010 }
1011
1012 /* If this is a static link, we need to discard all the got entries we've
1013 recorded. */
1014 if (!dynobj || !elf_hash_table (info)->dynamic_sections_created)
1015 elf_link_hash_traverse (elf_hash_table (info),
1016 elf_vax_discard_got_entries,
1017 info);
1018
1019 return true;
1020 }
1021
1022 /* Set the sizes of the dynamic sections. */
1023
1024 static bool
1025 elf_vax_late_size_sections (bfd *output_bfd, struct bfd_link_info *info)
1026 {
1027 bfd *dynobj;
1028 asection *s;
1029 bool relocs;
1030
1031 dynobj = elf_hash_table (info)->dynobj;
1032 if (dynobj == NULL)
1033 return true;
1034
1035 if (elf_hash_table (info)->dynamic_sections_created)
1036 {
1037 /* Set the contents of the .interp section to the interpreter. */
1038 if (bfd_link_executable (info) && !info->nointerp)
1039 {
1040 s = bfd_get_linker_section (dynobj, ".interp");
1041 BFD_ASSERT (s != NULL);
1042 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1043 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1044 s->alloced = 1;
1045 }
1046 }
1047
1048 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1049 relative relocs against symbols defined in a regular object. We
1050 allocated space for them in the check_relocs routine, but we will not
1051 fill them in in the relocate_section routine. */
1052 if (bfd_link_pic (info) && info->symbolic)
1053 elf_vax_link_hash_traverse (elf_hash_table (info),
1054 elf_vax_discard_copies,
1055 NULL);
1056
1057 /* If this is a -Bsymbolic shared link, we need to discard all the got
1058 entries we've recorded. Otherwise, we need to instantiate (allocate
1059 space for them). */
1060 elf_link_hash_traverse (elf_hash_table (info),
1061 elf_vax_instantiate_got_entries,
1062 info);
1063
1064 /* The check_relocs and adjust_dynamic_symbol entry points have
1065 determined the sizes of the various dynamic sections. Allocate
1066 memory for them. */
1067 relocs = false;
1068 for (s = dynobj->sections; s != NULL; s = s->next)
1069 {
1070 const char *name;
1071
1072 if ((s->flags & SEC_LINKER_CREATED) == 0)
1073 continue;
1074
1075 /* It's OK to base decisions on the section name, because none
1076 of the dynobj section names depend upon the input files. */
1077 name = bfd_section_name (s);
1078
1079 if (strcmp (name, ".plt") == 0)
1080 {
1081 /* Remember whether there is a PLT. */
1082 ;
1083 }
1084 else if (startswith (name, ".rela"))
1085 {
1086 if (s->size != 0)
1087 {
1088 if (strcmp (name, ".rela.plt") != 0)
1089 relocs = true;
1090
1091 /* We use the reloc_count field as a counter if we need
1092 to copy relocs into the output file. */
1093 s->reloc_count = 0;
1094 }
1095 }
1096 else if (! startswith (name, ".got")
1097 && strcmp (name, ".dynbss") != 0)
1098 {
1099 /* It's not one of our sections, so don't allocate space. */
1100 continue;
1101 }
1102
1103 if (s->size == 0)
1104 {
1105 /* If we don't need this section, strip it from the
1106 output file. This is mostly to handle .rela.bss and
1107 .rela.plt. We must create both sections in
1108 create_dynamic_sections, because they must be created
1109 before the linker maps input sections to output
1110 sections. The linker does that before
1111 adjust_dynamic_symbol is called, and it is that
1112 function which decides whether anything needs to go
1113 into these sections. */
1114 s->flags |= SEC_EXCLUDE;
1115 continue;
1116 }
1117
1118 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1119 continue;
1120
1121 /* Allocate memory for the section contents. */
1122 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1123 if (s->contents == NULL)
1124 return false;
1125 s->alloced = 1;
1126 }
1127
1128 return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
1129 }
1130
1131 /* This function is called via elf_vax_link_hash_traverse if we are
1132 creating a shared object with -Bsymbolic. It discards the space
1133 allocated to copy PC relative relocs against symbols which are defined
1134 in regular objects. We allocated space for them in the check_relocs
1135 routine, but we won't fill them in in the relocate_section routine. */
1136
1137 static bool
1138 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1139 void * ignore ATTRIBUTE_UNUSED)
1140 {
1141 struct elf_vax_pcrel_relocs_copied *s;
1142
1143 /* We only discard relocs for symbols defined in a regular object. */
1144 if (!h->root.def_regular)
1145 return true;
1146
1147 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1148 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1149
1150 return true;
1151 }
1152
1153 /* This function is called via elf_link_hash_traverse. It looks for
1154 entries that have GOT or PLT (.GOT) references. If creating a shared
1155 object with -Bsymbolic, or the symbol has been forced local, then it
1156 resets the reference count back to -1 so normal PC32 relocation will
1157 be done. Otherwise space in the .got and .rela.got will be reserved
1158 for the symbol. */
1159
1160 static bool
1161 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr)
1162 {
1163 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1164 bfd *dynobj;
1165 asection *sgot;
1166 asection *srelgot;
1167
1168 /* We don't care about non-GOT (and non-PLT) entries. */
1169 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1170 return true;
1171
1172 dynobj = elf_hash_table (info)->dynobj;
1173 BFD_ASSERT (dynobj != NULL);
1174
1175 sgot = elf_hash_table (info)->sgot;
1176 srelgot = elf_hash_table (info)->srelgot;
1177
1178 if (SYMBOL_REFERENCES_LOCAL (info, h))
1179 {
1180 h->got.refcount = -1;
1181 h->plt.refcount = -1;
1182 }
1183 else if (h->got.refcount > 0)
1184 {
1185 /* Make sure this symbol is output as a dynamic symbol. */
1186 if (h->dynindx == -1)
1187 {
1188 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1189 return false;
1190 }
1191
1192 /* Allocate space in the .got and .rela.got sections. */
1193 sgot->size += 4;
1194 srelgot->size += sizeof (Elf32_External_Rela);
1195 }
1196
1197 return true;
1198 }
1199
1200 /* Relocate an VAX ELF section. */
1201
1202 static int
1203 elf_vax_relocate_section (bfd *output_bfd,
1204 struct bfd_link_info *info,
1205 bfd *input_bfd,
1206 asection *input_section,
1207 bfd_byte *contents,
1208 Elf_Internal_Rela *relocs,
1209 Elf_Internal_Sym *local_syms,
1210 asection **local_sections)
1211 {
1212 Elf_Internal_Shdr *symtab_hdr;
1213 struct elf_link_hash_entry **sym_hashes;
1214 bfd_vma plt_index;
1215 bfd_vma got_offset;
1216 asection *sgot;
1217 asection *splt;
1218 asection *sgotplt;
1219 asection *sreloc;
1220 Elf_Internal_Rela *rel;
1221 Elf_Internal_Rela *relend;
1222
1223 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1224 sym_hashes = elf_sym_hashes (input_bfd);
1225
1226 sgot = NULL;
1227 splt = NULL;
1228 sgotplt = NULL;
1229 sreloc = NULL;
1230
1231 rel = relocs;
1232 relend = relocs + input_section->reloc_count;
1233 for (; rel < relend; rel++)
1234 {
1235 int r_type;
1236 reloc_howto_type *howto;
1237 unsigned long r_symndx;
1238 struct elf_link_hash_entry *h;
1239 Elf_Internal_Sym *sym;
1240 asection *sec;
1241 bfd_vma relocation;
1242 bfd_reloc_status_type r;
1243
1244 r_type = ELF32_R_TYPE (rel->r_info);
1245 if (r_type < 0 || r_type >= (int) R_VAX_max)
1246 {
1247 bfd_set_error (bfd_error_bad_value);
1248 return false;
1249 }
1250 howto = howto_table + r_type;
1251
1252 r_symndx = ELF32_R_SYM (rel->r_info);
1253 h = NULL;
1254 sym = NULL;
1255 sec = NULL;
1256 if (r_symndx < symtab_hdr->sh_info)
1257 {
1258 sym = local_syms + r_symndx;
1259 sec = local_sections[r_symndx];
1260 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1261 }
1262 else
1263 {
1264 bool unresolved_reloc;
1265 bool warned, ignored;
1266
1267 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1268 r_symndx, symtab_hdr, sym_hashes,
1269 h, sec, relocation,
1270 unresolved_reloc, warned, ignored);
1271
1272 if ((h->root.type == bfd_link_hash_defined
1273 || h->root.type == bfd_link_hash_defweak)
1274 && ((r_type == R_VAX_PLT32
1275 && h->plt.offset != (bfd_vma) -1
1276 && !h->forced_local
1277 && elf_hash_table (info)->dynamic_sections_created)
1278 || (r_type == R_VAX_GOT32
1279 && h->got.offset != (bfd_vma) -1
1280 && !h->forced_local
1281 && elf_hash_table (info)->dynamic_sections_created
1282 && (! bfd_link_pic (info)
1283 || (! info->symbolic && h->dynindx != -1)
1284 || !h->def_regular))
1285 || (bfd_link_pic (info)
1286 && ((! info->symbolic && h->dynindx != -1)
1287 || !h->def_regular)
1288 && ((input_section->flags & SEC_ALLOC) != 0
1289 /* DWARF will emit R_VAX_32 relocations in its
1290 sections against symbols defined externally
1291 in shared libraries. We can't do anything
1292 with them here. */
1293
1294 || ((input_section->flags & SEC_DEBUGGING) != 0
1295 && h->def_dynamic))
1296 && (r_type == R_VAX_8
1297 || r_type == R_VAX_16
1298 || r_type == R_VAX_32))))
1299 /* In these cases, we don't need the relocation
1300 value. We check specially because in some
1301 obscure cases sec->output_section will be NULL. */
1302 relocation = 0;
1303 }
1304
1305 if (sec != NULL && discarded_section (sec))
1306 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1307 rel, 1, relend, howto, 0, contents);
1308
1309 if (bfd_link_relocatable (info))
1310 continue;
1311
1312 switch (r_type)
1313 {
1314 case R_VAX_GOT32:
1315 /* Relocation is to the address of the entry for this symbol
1316 in the global offset table. */
1317
1318 /* Resolve a GOTxx reloc against a local symbol directly,
1319 without using the global offset table. */
1320 if (h == NULL
1321 || h->got.offset == (bfd_vma) -1)
1322 break;
1323
1324 {
1325 bfd_vma off;
1326
1327 sgot = elf_hash_table (info)->sgot;
1328 BFD_ASSERT (sgot != NULL);
1329
1330 off = h->got.offset;
1331 BFD_ASSERT (off < sgot->size);
1332
1333 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1334
1335 relocation = sgot->output_offset + off;
1336 /* The GOT relocation uses the addend. */
1337 rel->r_addend = 0;
1338
1339 /* Change the reference to be indirect. */
1340 contents[rel->r_offset - 1] |= 0x10;
1341 relocation += sgot->output_section->vma;
1342 }
1343 break;
1344
1345 case R_VAX_PC32:
1346 /* If we are creating an executable and the function this
1347 reloc refers to is in a shared lib, then we made a PLT
1348 entry for this symbol and need to handle the reloc like
1349 a PLT reloc. */
1350 if (bfd_link_pic (info))
1351 goto r_vax_pc32_shared;
1352 /* Fall through. */
1353 case R_VAX_PLT32:
1354 /* Relocation is to the entry for this symbol in the
1355 procedure linkage table. */
1356
1357 /* Resolve a PLTxx reloc against a local symbol directly,
1358 without using the procedure linkage table. */
1359 if (h == NULL
1360 || h->plt.offset == (bfd_vma) -1)
1361 break;
1362
1363 splt = elf_hash_table (info)->splt;
1364 BFD_ASSERT (splt != NULL);
1365
1366 sgotplt = elf_hash_table (info)->sgotplt;
1367 BFD_ASSERT (sgotplt != NULL);
1368
1369 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1370
1371 /* Get the offset into the .got table of the entry that
1372 corresponds to this function. Each .got entry is 4 bytes.
1373 The first two are reserved. */
1374 got_offset = (plt_index + 3) * 4;
1375
1376 /* We want the relocation to point into the .got.plt instead
1377 of the plt itself. */
1378 relocation = (sgotplt->output_section->vma
1379 + sgotplt->output_offset
1380 + got_offset);
1381 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1382 if (rel->r_addend == 2)
1383 {
1384 h->plt.offset |= 1;
1385 }
1386 else if (rel->r_addend != 0)
1387 _bfd_error_handler
1388 /* xgettext:c-format */
1389 (_("%pB: warning: PLT addend of %" PRId64 " to `%s'"
1390 " from %pA section ignored"),
1391 input_bfd, (int64_t) rel->r_addend, h->root.root.string,
1392 input_section);
1393 rel->r_addend = 0;
1394
1395 break;
1396
1397 case R_VAX_PC8:
1398 case R_VAX_PC16:
1399 r_vax_pc32_shared:
1400 if (h == NULL
1401 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1402 || h->forced_local)
1403 break;
1404 /* Fall through. */
1405 case R_VAX_8:
1406 case R_VAX_16:
1407 case R_VAX_32:
1408 if (bfd_link_pic (info)
1409 && r_symndx != STN_UNDEF
1410 && (input_section->flags & SEC_ALLOC) != 0
1411 && ((r_type != R_VAX_PC8
1412 && r_type != R_VAX_PC16
1413 && r_type != R_VAX_PC32)
1414 || ((input_section->flags & SEC_CODE)
1415 && (!info->symbolic
1416 || (!h->def_regular && h->type != STT_SECTION)))))
1417 {
1418 Elf_Internal_Rela outrel;
1419 bfd_byte *loc;
1420 bool skip, relocate;
1421
1422 /* When generating a shared object, these relocations
1423 are copied into the output file to be resolved at run
1424 time. */
1425 if (sreloc == NULL)
1426 {
1427 sreloc = _bfd_elf_get_dynamic_reloc_section
1428 (input_bfd, input_section, /*rela?*/ true);
1429 if (sreloc == NULL)
1430 return false;
1431 }
1432
1433 skip = false;
1434 relocate = false;
1435
1436 outrel.r_offset =
1437 _bfd_elf_section_offset (output_bfd, info, input_section,
1438 rel->r_offset);
1439 if (outrel.r_offset == (bfd_vma) -1)
1440 skip = true;
1441 if (outrel.r_offset == (bfd_vma) -2)
1442 skip = true, relocate = true;
1443 outrel.r_offset += (input_section->output_section->vma
1444 + input_section->output_offset);
1445
1446 if (skip)
1447 memset (&outrel, 0, sizeof outrel);
1448 /* h->dynindx may be -1 if the symbol was marked to
1449 become local. */
1450 else if (h != NULL
1451 && ((! info->symbolic && h->dynindx != -1)
1452 || !h->def_regular))
1453 {
1454 BFD_ASSERT (h->dynindx != -1);
1455 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1456 outrel.r_addend = relocation + rel->r_addend;
1457 }
1458 else
1459 {
1460 if (r_type == R_VAX_32)
1461 {
1462 relocate = true;
1463 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1464 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1465 &contents[rel->r_offset]) == 0);
1466 outrel.r_addend = relocation + rel->r_addend;
1467 }
1468 else
1469 {
1470 long indx;
1471
1472 if (bfd_is_abs_section (sec))
1473 indx = 0;
1474 else if (sec == NULL || sec->owner == NULL)
1475 {
1476 bfd_set_error (bfd_error_bad_value);
1477 return false;
1478 }
1479 else
1480 {
1481 asection *osec;
1482
1483 /* We are turning this relocation into one
1484 against a section symbol. It would be
1485 proper to subtract the symbol's value,
1486 osec->vma, from the emitted reloc addend,
1487 but ld.so expects buggy relocs. */
1488 osec = sec->output_section;
1489 indx = elf_section_data (osec)->dynindx;
1490 if (indx == 0)
1491 {
1492 struct elf_link_hash_table *htab;
1493 htab = elf_hash_table (info);
1494 osec = htab->text_index_section;
1495 indx = elf_section_data (osec)->dynindx;
1496 }
1497 BFD_ASSERT (indx != 0);
1498 }
1499
1500 outrel.r_info = ELF32_R_INFO (indx, r_type);
1501 outrel.r_addend = relocation + rel->r_addend;
1502 }
1503 }
1504
1505 if ((input_section->flags & SEC_CODE) != 0
1506 || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32
1507 && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE
1508 && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY
1509 && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT
1510 && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT))
1511 {
1512 if (h != NULL)
1513 _bfd_error_handler
1514 /* xgettext:c-format */
1515 (_("%pB: warning: %s relocation against symbol `%s'"
1516 " from %pA section"),
1517 input_bfd, howto->name, h->root.root.string,
1518 input_section);
1519 else
1520 _bfd_error_handler
1521 /* xgettext:c-format */
1522 (_("%pB: warning: %s relocation to %#" PRIx64
1523 " from %pA section"),
1524 input_bfd, howto->name, (uint64_t) outrel.r_addend,
1525 input_section);
1526 }
1527 loc = sreloc->contents;
1528 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1529 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1530
1531 /* This reloc will be computed at runtime, so there's no
1532 need to do anything now, except for R_VAX_32
1533 relocations that have been turned into
1534 R_VAX_RELATIVE. */
1535 if (!relocate)
1536 continue;
1537 }
1538
1539 break;
1540
1541 case R_VAX_GNU_VTINHERIT:
1542 case R_VAX_GNU_VTENTRY:
1543 /* These are no-ops in the end. */
1544 continue;
1545
1546 default:
1547 break;
1548 }
1549
1550 /* VAX PCREL relocations are from the end of relocation, not the start.
1551 So subtract the difference from the relocation amount since we can't
1552 add it to the offset. */
1553 if (howto->pc_relative && howto->pcrel_offset)
1554 relocation -= bfd_get_reloc_size(howto);
1555
1556 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1557 contents, rel->r_offset,
1558 relocation, rel->r_addend);
1559
1560 if (r != bfd_reloc_ok)
1561 {
1562 switch (r)
1563 {
1564 default:
1565 case bfd_reloc_outofrange:
1566 abort ();
1567 case bfd_reloc_overflow:
1568 {
1569 const char *name;
1570
1571 if (h != NULL)
1572 name = NULL;
1573 else
1574 {
1575 name = bfd_elf_string_from_elf_section (input_bfd,
1576 symtab_hdr->sh_link,
1577 sym->st_name);
1578 if (name == NULL)
1579 return false;
1580 if (*name == '\0')
1581 name = bfd_section_name (sec);
1582 }
1583 info->callbacks->reloc_overflow
1584 (info, (h ? &h->root : NULL), name, howto->name,
1585 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1586 }
1587 break;
1588 }
1589 }
1590 }
1591
1592 return true;
1593 }
1594
1595 /* Finish up dynamic symbol handling. We set the contents of various
1596 dynamic sections here. */
1597
1598 static bool
1599 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1600 struct elf_link_hash_entry *h,
1601 Elf_Internal_Sym *sym)
1602 {
1603 bfd *dynobj;
1604
1605 dynobj = elf_hash_table (info)->dynobj;
1606
1607 if (h->plt.offset != (bfd_vma) -1)
1608 {
1609 asection *splt;
1610 asection *sgot;
1611 asection *srela;
1612 bfd_vma plt_index;
1613 bfd_vma got_offset;
1614 bfd_vma addend;
1615 Elf_Internal_Rela rela;
1616 bfd_byte *loc;
1617
1618 /* This symbol has an entry in the procedure linkage table. Set
1619 it up. */
1620 BFD_ASSERT (h->dynindx != -1);
1621
1622 splt = elf_hash_table (info)->splt;
1623 sgot = elf_hash_table (info)->sgotplt;
1624 srela = elf_hash_table (info)->srelplt;
1625 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1626
1627 addend = 2 * (h->plt.offset & 1);
1628 h->plt.offset &= ~1;
1629
1630 /* Get the index in the procedure linkage table which
1631 corresponds to this symbol. This is the index of this symbol
1632 in all the symbols for which we are making plt entries. The
1633 first entry in the procedure linkage table is reserved. */
1634 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1635
1636 /* Get the offset into the .got table of the entry that
1637 corresponds to this function. Each .got entry is 4 bytes.
1638 The first two are reserved. */
1639 got_offset = (plt_index + 3) * 4;
1640
1641 /* Fill in the entry in the procedure linkage table. */
1642 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1643 PLT_ENTRY_SIZE);
1644
1645 /* The offset is relative to the first extension word. */
1646 bfd_put_32 (output_bfd,
1647 -(h->plt.offset + 8),
1648 splt->contents + h->plt.offset + 4);
1649
1650 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1651 splt->contents + h->plt.offset + 8);
1652
1653 /* Fill in the entry in the global offset table. */
1654 bfd_put_32 (output_bfd,
1655 (splt->output_section->vma
1656 + splt->output_offset
1657 + h->plt.offset) + addend,
1658 sgot->contents + got_offset);
1659
1660 /* Fill in the entry in the .rela.plt section. */
1661 rela.r_offset = (sgot->output_section->vma
1662 + sgot->output_offset
1663 + got_offset);
1664 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1665 rela.r_addend = addend;
1666 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1667 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1668
1669 if (!h->def_regular)
1670 {
1671 /* Mark the symbol as undefined, rather than as defined in
1672 the .plt section. Leave the value alone. */
1673 sym->st_shndx = SHN_UNDEF;
1674 }
1675 }
1676
1677 if (h->got.offset != (bfd_vma) -1)
1678 {
1679 asection *sgot;
1680 asection *srela;
1681 Elf_Internal_Rela rela;
1682 bfd_byte *loc;
1683
1684 /* This symbol has an entry in the global offset table. Set it
1685 up. */
1686 sgot = elf_hash_table (info)->sgot;
1687 srela = elf_hash_table (info)->srelgot;
1688 BFD_ASSERT (sgot != NULL && srela != NULL);
1689
1690 rela.r_offset = (sgot->output_section->vma
1691 + sgot->output_offset
1692 + h->got.offset);
1693 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1694 rela.r_addend = bfd_get_signed_32 (output_bfd,
1695 sgot->contents + h->got.offset);
1696
1697 loc = srela->contents;
1698 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1699 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1700 }
1701
1702 if (h->needs_copy)
1703 {
1704 asection *s;
1705 Elf_Internal_Rela rela;
1706 bfd_byte *loc;
1707
1708 /* This symbol needs a copy reloc. Set it up. */
1709 BFD_ASSERT (h->dynindx != -1
1710 && (h->root.type == bfd_link_hash_defined
1711 || h->root.type == bfd_link_hash_defweak));
1712
1713 s = bfd_get_linker_section (dynobj, ".rela.bss");
1714 BFD_ASSERT (s != NULL);
1715
1716 rela.r_offset = (h->root.u.def.value
1717 + h->root.u.def.section->output_section->vma
1718 + h->root.u.def.section->output_offset);
1719 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1720 rela.r_addend = 0;
1721 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1722 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1723 }
1724
1725 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1726 if (h == elf_hash_table (info)->hdynamic
1727 || h == elf_hash_table (info)->hgot)
1728 sym->st_shndx = SHN_ABS;
1729
1730 return true;
1731 }
1732
1733 /* Finish up the dynamic sections. */
1734
1735 static bool
1736 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1737 {
1738 bfd *dynobj;
1739 asection *sgot;
1740 asection *sdyn;
1741
1742 dynobj = elf_hash_table (info)->dynobj;
1743
1744 sgot = elf_hash_table (info)->sgotplt;
1745 BFD_ASSERT (sgot != NULL);
1746 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
1747
1748 if (elf_hash_table (info)->dynamic_sections_created)
1749 {
1750 asection *splt;
1751 Elf32_External_Dyn *dyncon, *dynconend;
1752
1753 splt = elf_hash_table (info)->splt;
1754 BFD_ASSERT (splt != NULL && sdyn != NULL);
1755
1756 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1757 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1758 for (; dyncon < dynconend; dyncon++)
1759 {
1760 Elf_Internal_Dyn dyn;
1761 asection *s;
1762
1763 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1764
1765 switch (dyn.d_tag)
1766 {
1767 default:
1768 break;
1769
1770 case DT_PLTGOT:
1771 s = elf_hash_table (info)->sgotplt;
1772 goto get_vma;
1773 case DT_JMPREL:
1774 s = elf_hash_table (info)->srelplt;
1775 get_vma:
1776 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
1777 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1778 break;
1779
1780 case DT_PLTRELSZ:
1781 s = elf_hash_table (info)->srelplt;
1782 dyn.d_un.d_val = s->size;
1783 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1784 break;
1785 }
1786 }
1787
1788 /* Fill in the first entry in the procedure linkage table. */
1789 if (splt->size > 0)
1790 {
1791 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
1792 bfd_put_32 (output_bfd,
1793 (sgot->output_section->vma
1794 + sgot->output_offset + 4
1795 - (splt->output_section->vma + 6)),
1796 splt->contents + 2);
1797 bfd_put_32 (output_bfd,
1798 (sgot->output_section->vma
1799 + sgot->output_offset + 8
1800 - (splt->output_section->vma + 12)),
1801 splt->contents + 8);
1802 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1803 = PLT_ENTRY_SIZE;
1804 }
1805 }
1806
1807 /* Fill in the first three entries in the global offset table. */
1808 if (sgot->size > 0)
1809 {
1810 if (sdyn == NULL)
1811 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1812 else
1813 bfd_put_32 (output_bfd,
1814 sdyn->output_section->vma + sdyn->output_offset,
1815 sgot->contents);
1816 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1817 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1818 }
1819
1820 if (elf_section_data (sgot->output_section) != NULL)
1821 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1822
1823 return true;
1824 }
1825
1826 static enum elf_reloc_type_class
1827 elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
1828 const asection *rel_sec ATTRIBUTE_UNUSED,
1829 const Elf_Internal_Rela *rela)
1830 {
1831 switch ((int) ELF32_R_TYPE (rela->r_info))
1832 {
1833 case R_VAX_RELATIVE:
1834 return reloc_class_relative;
1835 case R_VAX_JMP_SLOT:
1836 return reloc_class_plt;
1837 case R_VAX_COPY:
1838 return reloc_class_copy;
1839 default:
1840 return reloc_class_normal;
1841 }
1842 }
1843
1844 static bfd_vma
1845 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
1846 const arelent *rel ATTRIBUTE_UNUSED)
1847 {
1848 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
1849 }
1850
1851 #define TARGET_LITTLE_SYM vax_elf32_vec
1852 #define TARGET_LITTLE_NAME "elf32-vax"
1853 #define ELF_TARGET_ID VAX_ELF_DATA
1854 #define ELF_MACHINE_CODE EM_VAX
1855 #define ELF_MAXPAGESIZE 0x1000
1856
1857 #define elf_backend_create_dynamic_sections \
1858 _bfd_elf_create_dynamic_sections
1859 #define bfd_elf32_bfd_link_hash_table_create \
1860 elf_vax_link_hash_table_create
1861 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
1862
1863 #define elf_backend_check_relocs elf_vax_check_relocs
1864 #define elf_backend_adjust_dynamic_symbol \
1865 elf_vax_adjust_dynamic_symbol
1866 #define elf_backend_early_size_sections elf_vax_early_size_sections
1867 #define elf_backend_late_size_sections elf_vax_late_size_sections
1868 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
1869 #define elf_backend_relocate_section elf_vax_relocate_section
1870 #define elf_backend_finish_dynamic_symbol \
1871 elf_vax_finish_dynamic_symbol
1872 #define elf_backend_finish_dynamic_sections \
1873 elf_vax_finish_dynamic_sections
1874 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
1875 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
1876 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
1877 #define bfd_elf32_bfd_merge_private_bfd_data \
1878 elf32_vax_merge_private_bfd_data
1879 #define bfd_elf32_bfd_set_private_flags \
1880 elf32_vax_set_private_flags
1881 #define bfd_elf32_bfd_print_private_bfd_data \
1882 elf32_vax_print_private_bfd_data
1883
1884 #define elf_backend_can_gc_sections 1
1885 #define elf_backend_want_got_plt 1
1886 #define elf_backend_plt_readonly 1
1887 #define elf_backend_want_plt_sym 0
1888 #define elf_backend_got_header_size 16
1889 #define elf_backend_rela_normal 1
1890 #define elf_backend_dtrel_excludes_plt 1
1891
1892 #include "elf32-target.h"
The GNU Binutils are a collection of binary tools.