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[thirdparty/binutils-gdb.git] / bfd / elf32-vax.c
1 /* VAX series support for 32-bit ELF
2 Copyright (C) 1993-2018 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 bfd_boolean 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 bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
36 asection *, const Elf_Internal_Rela *);
37 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
38 struct elf_link_hash_entry *);
39 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
40 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
41 bfd *, asection *, bfd_byte *,
42 Elf_Internal_Rela *,
43 Elf_Internal_Sym *, asection **);
44 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
45 struct elf_link_hash_entry *,
46 Elf_Internal_Sym *);
47 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
48 struct bfd_link_info *);
49 static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *,
50 const arelent *);
51
52 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
53 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, void *);
54
55 static reloc_howto_type howto_table[] = {
56 HOWTO (R_VAX_NONE, /* type */
57 0, /* rightshift */
58 3, /* size (0 = byte, 1 = short, 2 = long) */
59 0, /* bitsize */
60 FALSE, /* pc_relative */
61 0, /* bitpos */
62 complain_overflow_dont, /* complain_on_overflow */
63 bfd_elf_generic_reloc, /* special_function */
64 "R_VAX_NONE", /* name */
65 FALSE, /* partial_inplace */
66 0, /* src_mask */
67 0x00000000, /* dst_mask */
68 FALSE), /* pcrel_offset */
69
70 HOWTO (R_VAX_32, /* type */
71 0, /* rightshift */
72 2, /* size (0 = byte, 1 = short, 2 = long) */
73 32, /* bitsize */
74 FALSE, /* pc_relative */
75 0, /* bitpos */
76 complain_overflow_bitfield, /* complain_on_overflow */
77 bfd_elf_generic_reloc, /* special_function */
78 "R_VAX_32", /* name */
79 FALSE, /* partial_inplace */
80 0, /* src_mask */
81 0xffffffff, /* dst_mask */
82 FALSE), /* pcrel_offset */
83
84 HOWTO (R_VAX_16, /* type */
85 0, /* rightshift */
86 1, /* size (0 = byte, 1 = short, 2 = long) */
87 16, /* bitsize */
88 FALSE, /* pc_relative */
89 0, /* bitpos */
90 complain_overflow_bitfield, /* complain_on_overflow */
91 bfd_elf_generic_reloc, /* special_function */
92 "R_VAX_16", /* name */
93 FALSE, /* partial_inplace */
94 0, /* src_mask */
95 0x0000ffff, /* dst_mask */
96 FALSE), /* pcrel_offset */
97
98 HOWTO (R_VAX_8, /* type */
99 0, /* rightshift */
100 0, /* size (0 = byte, 1 = short, 2 = long) */
101 8, /* bitsize */
102 FALSE, /* pc_relative */
103 0, /* bitpos */
104 complain_overflow_bitfield, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_VAX_8", /* name */
107 FALSE, /* partial_inplace */
108 0, /* src_mask */
109 0x000000ff, /* dst_mask */
110 FALSE), /* pcrel_offset */
111
112 HOWTO (R_VAX_PC32, /* type */
113 0, /* rightshift */
114 2, /* size (0 = byte, 1 = short, 2 = long) */
115 32, /* bitsize */
116 TRUE, /* pc_relative */
117 0, /* bitpos */
118 complain_overflow_bitfield, /* complain_on_overflow */
119 bfd_elf_generic_reloc, /* special_function */
120 "R_VAX_PC32", /* name */
121 FALSE, /* partial_inplace */
122 0, /* src_mask */
123 0xffffffff, /* dst_mask */
124 TRUE), /* pcrel_offset */
125
126 HOWTO (R_VAX_PC16, /* type */
127 0, /* rightshift */
128 1, /* size (0 = byte, 1 = short, 2 = long) */
129 16, /* bitsize */
130 TRUE, /* pc_relative */
131 0, /* bitpos */
132 complain_overflow_signed, /* complain_on_overflow */
133 bfd_elf_generic_reloc, /* special_function */
134 "R_VAX_PC16", /* name */
135 FALSE, /* partial_inplace */
136 0, /* src_mask */
137 0x0000ffff, /* dst_mask */
138 TRUE), /* pcrel_offset */
139
140 HOWTO (R_VAX_PC8, /* type */
141 0, /* rightshift */
142 0, /* size (0 = byte, 1 = short, 2 = long) */
143 8, /* bitsize */
144 TRUE, /* pc_relative */
145 0, /* bitpos */
146 complain_overflow_signed, /* complain_on_overflow */
147 bfd_elf_generic_reloc, /* special_function */
148 "R_VAX_PC8", /* name */
149 FALSE, /* partial_inplace */
150 0, /* src_mask */
151 0x000000ff, /* dst_mask */
152 TRUE), /* pcrel_offset */
153
154 HOWTO (R_VAX_GOT32, /* type */
155 0, /* rightshift */
156 2, /* size (0 = byte, 1 = short, 2 = long) */
157 32, /* bitsize */
158 TRUE, /* pc_relative */
159 0, /* bitpos */
160 complain_overflow_bitfield, /* complain_on_overflow */
161 bfd_elf_generic_reloc, /* special_function */
162 "R_VAX_GOT32", /* name */
163 FALSE, /* partial_inplace */
164 0, /* src_mask */
165 0xffffffff, /* dst_mask */
166 TRUE), /* pcrel_offset */
167
168 EMPTY_HOWTO (-1),
169 EMPTY_HOWTO (-1),
170 EMPTY_HOWTO (-1),
171 EMPTY_HOWTO (-1),
172 EMPTY_HOWTO (-1),
173
174 HOWTO (R_VAX_PLT32, /* type */
175 0, /* rightshift */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
177 32, /* bitsize */
178 TRUE, /* pc_relative */
179 0, /* bitpos */
180 complain_overflow_bitfield, /* complain_on_overflow */
181 bfd_elf_generic_reloc, /* special_function */
182 "R_VAX_PLT32", /* name */
183 FALSE, /* partial_inplace */
184 0, /* src_mask */
185 0xffffffff, /* dst_mask */
186 TRUE), /* pcrel_offset */
187
188 EMPTY_HOWTO (-1),
189 EMPTY_HOWTO (-1),
190 EMPTY_HOWTO (-1),
191 EMPTY_HOWTO (-1),
192 EMPTY_HOWTO (-1),
193
194 HOWTO (R_VAX_COPY, /* type */
195 0, /* rightshift */
196 0, /* size (0 = byte, 1 = short, 2 = long) */
197 0, /* bitsize */
198 FALSE, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_dont, /* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_VAX_COPY", /* name */
203 FALSE, /* partial_inplace */
204 0, /* src_mask */
205 0xffffffff, /* dst_mask */
206 FALSE), /* pcrel_offset */
207
208 HOWTO (R_VAX_GLOB_DAT, /* type */
209 0, /* rightshift */
210 2, /* size (0 = byte, 1 = short, 2 = long) */
211 32, /* bitsize */
212 FALSE, /* pc_relative */
213 0, /* bitpos */
214 complain_overflow_dont, /* complain_on_overflow */
215 bfd_elf_generic_reloc, /* special_function */
216 "R_VAX_GLOB_DAT", /* name */
217 FALSE, /* partial_inplace */
218 0, /* src_mask */
219 0xffffffff, /* dst_mask */
220 FALSE), /* pcrel_offset */
221
222 HOWTO (R_VAX_JMP_SLOT, /* type */
223 0, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 32, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_dont, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_VAX_JMP_SLOT", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0xffffffff, /* dst_mask */
234 FALSE), /* pcrel_offset */
235
236 HOWTO (R_VAX_RELATIVE, /* type */
237 0, /* rightshift */
238 2, /* size (0 = byte, 1 = short, 2 = long) */
239 32, /* bitsize */
240 FALSE, /* pc_relative */
241 0, /* bitpos */
242 complain_overflow_dont, /* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_VAX_RELATIVE", /* name */
245 FALSE, /* partial_inplace */
246 0, /* src_mask */
247 0xffffffff, /* dst_mask */
248 FALSE), /* pcrel_offset */
249
250 /* GNU extension to record C++ vtable hierarchy */
251 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
252 0, /* rightshift */
253 2, /* size (0 = byte, 1 = short, 2 = long) */
254 0, /* bitsize */
255 FALSE, /* pc_relative */
256 0, /* bitpos */
257 complain_overflow_dont, /* complain_on_overflow */
258 NULL, /* special_function */
259 "R_VAX_GNU_VTINHERIT", /* name */
260 FALSE, /* partial_inplace */
261 0, /* src_mask */
262 0, /* dst_mask */
263 FALSE), /* pcrel_offset */
264
265 /* GNU extension to record C++ vtable member usage */
266 HOWTO (R_VAX_GNU_VTENTRY, /* type */
267 0, /* rightshift */
268 2, /* size (0 = byte, 1 = short, 2 = long) */
269 0, /* bitsize */
270 FALSE, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_dont, /* complain_on_overflow */
273 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
274 "R_VAX_GNU_VTENTRY", /* name */
275 FALSE, /* partial_inplace */
276 0, /* src_mask */
277 0, /* dst_mask */
278 FALSE), /* pcrel_offset */
279 };
280
281 static bfd_boolean
282 rtype_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
283 {
284 unsigned int r_type;
285
286 r_type = ELF32_R_TYPE (dst->r_info);
287 if (r_type >= R_VAX_max)
288 {
289 /* xgettext:c-format */
290 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
291 abfd, r_type);
292 bfd_set_error (bfd_error_bad_value);
293 return FALSE;
294 }
295 cache_ptr->howto = &howto_table[r_type];
296 return TRUE;
297 }
298
299 #define elf_info_to_howto rtype_to_howto
300
301 static const struct
302 {
303 bfd_reloc_code_real_type bfd_val;
304 int elf_val;
305 } reloc_map[] = {
306 { BFD_RELOC_NONE, R_VAX_NONE },
307 { BFD_RELOC_32, R_VAX_32 },
308 { BFD_RELOC_16, R_VAX_16 },
309 { BFD_RELOC_8, R_VAX_8 },
310 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
311 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
312 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
313 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
314 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
315 { BFD_RELOC_NONE, R_VAX_COPY },
316 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
317 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
318 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
319 { BFD_RELOC_CTOR, R_VAX_32 },
320 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
321 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
322 };
323
324 static reloc_howto_type *
325 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
326 {
327 unsigned int i;
328 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
329 {
330 if (reloc_map[i].bfd_val == code)
331 return &howto_table[reloc_map[i].elf_val];
332 }
333 return 0;
334 }
335
336 static reloc_howto_type *
337 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
338 const char *r_name)
339 {
340 unsigned int i;
341
342 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
343 if (howto_table[i].name != NULL
344 && strcasecmp (howto_table[i].name, r_name) == 0)
345 return &howto_table[i];
346
347 return NULL;
348 }
349
350 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
351 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
352 #define ELF_ARCH bfd_arch_vax
353 /* end code generated by elf.el */
354 \f
355 /* Functions for the VAX ELF linker. */
356
357 /* The name of the dynamic interpreter. This is put in the .interp
358 section. */
359
360 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
361
362 /* The size in bytes of an entry in the procedure linkage table. */
363
364 #define PLT_ENTRY_SIZE 12
365
366 /* The first entry in a procedure linkage table looks like this. See
367 the SVR4 ABI VAX supplement to see how this works. */
368
369 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
370 {
371 0xdd, 0xef, /* pushl l^ */
372 0, 0, 0, 0, /* offset to .plt.got + 4 */
373 0x17, 0xff, /* jmp @L^(pc) */
374 0, 0, 0, 0, /* offset to .plt.got + 8 */
375 };
376
377 /* Subsequent entries in a procedure linkage table look like this. */
378
379 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
380 {
381 0xfc, 0x0f, /* .word ^M<r11:r2> */
382 0x16, 0xef, /* jsb L^(pc) */
383 0, 0, 0, 0, /* replaced with offset to start of .plt */
384 0, 0, 0, 0, /* index into .rela.plt */
385 };
386
387 /* The VAX linker needs to keep track of the number of relocs that it
388 decides to copy in check_relocs for each symbol. This is so that it
389 can discard PC relative relocs if it doesn't need them when linking
390 with -Bsymbolic. We store the information in a field extending the
391 regular ELF linker hash table. */
392
393 /* This structure keeps track of the number of PC relative relocs we have
394 copied for a given symbol. */
395
396 struct elf_vax_pcrel_relocs_copied
397 {
398 /* Next section. */
399 struct elf_vax_pcrel_relocs_copied *next;
400 /* A section in dynobj. */
401 asection *section;
402 /* Number of relocs copied in this section. */
403 bfd_size_type count;
404 };
405
406 /* VAX ELF linker hash entry. */
407
408 struct elf_vax_link_hash_entry
409 {
410 struct elf_link_hash_entry root;
411
412 /* Number of PC relative relocs copied for this symbol. */
413 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
414
415 bfd_vma got_addend;
416 };
417
418 /* Declare this now that the above structures are defined. */
419
420 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
421 void *);
422
423 /* Declare this now that the above structures are defined. */
424
425 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
426 void *);
427
428 /* Traverse an VAX ELF linker hash table. */
429
430 #define elf_vax_link_hash_traverse(table, func, info) \
431 (elf_link_hash_traverse \
432 ((table), \
433 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
434 (info)))
435
436 /* Create an entry in an VAX ELF linker hash table. */
437
438 static struct bfd_hash_entry *
439 elf_vax_link_hash_newfunc (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 == 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 == 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 != 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
469 static struct bfd_link_hash_table *
470 elf_vax_link_hash_table_create (bfd *abfd)
471 {
472 struct elf_link_hash_table *ret;
473 bfd_size_type amt = sizeof (struct elf_link_hash_table);
474
475 ret = bfd_zmalloc (amt);
476 if (ret == NULL)
477 return NULL;
478
479 if (!_bfd_elf_link_hash_table_init (ret, abfd,
480 elf_vax_link_hash_newfunc,
481 sizeof (struct elf_vax_link_hash_entry),
482 GENERIC_ELF_DATA))
483 {
484 free (ret);
485 return NULL;
486 }
487
488 return &ret->root;
489 }
490
491 /* Keep vax-specific flags in the ELF header */
492 static bfd_boolean
493 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
494 {
495 elf_elfheader (abfd)->e_flags = flags;
496 elf_flags_init (abfd) = TRUE;
497 return TRUE;
498 }
499
500 /* Merge backend specific data from an object file to the output
501 object file when linking. */
502 static bfd_boolean
503 elf32_vax_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
504 {
505 bfd *obfd = info->output_bfd;
506 flagword in_flags;
507
508 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
509 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
510 return TRUE;
511
512 in_flags = elf_elfheader (ibfd)->e_flags;
513
514 if (!elf_flags_init (obfd))
515 {
516 elf_flags_init (obfd) = TRUE;
517 elf_elfheader (obfd)->e_flags = in_flags;
518 }
519
520 return TRUE;
521 }
522
523 /* Display the flags field */
524 static bfd_boolean
525 elf32_vax_print_private_bfd_data (bfd *abfd, void * ptr)
526 {
527 FILE *file = (FILE *) ptr;
528
529 BFD_ASSERT (abfd != NULL && ptr != NULL);
530
531 /* Print normal ELF private data. */
532 _bfd_elf_print_private_bfd_data (abfd, ptr);
533
534 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
535
536 /* xgettext:c-format */
537 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
538
539 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
540 fprintf (file, _(" [nonpic]"));
541
542 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
543 fprintf (file, _(" [d-float]"));
544
545 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
546 fprintf (file, _(" [g-float]"));
547
548 fputc ('\n', file);
549
550 return TRUE;
551 }
552 /* Look through the relocs for a section during the first phase, and
553 allocate space in the global offset table or procedure linkage
554 table. */
555
556 static bfd_boolean
557 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
558 const Elf_Internal_Rela *relocs)
559 {
560 bfd *dynobj;
561 Elf_Internal_Shdr *symtab_hdr;
562 struct elf_link_hash_entry **sym_hashes;
563 const Elf_Internal_Rela *rel;
564 const Elf_Internal_Rela *rel_end;
565 asection *sreloc;
566
567 if (bfd_link_relocatable (info))
568 return TRUE;
569
570 dynobj = elf_hash_table (info)->dynobj;
571 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
572 sym_hashes = elf_sym_hashes (abfd);
573
574 sreloc = NULL;
575
576 rel_end = relocs + sec->reloc_count;
577 for (rel = relocs; rel < rel_end; rel++)
578 {
579 unsigned long r_symndx;
580 struct elf_link_hash_entry *h;
581
582 r_symndx = ELF32_R_SYM (rel->r_info);
583
584 if (r_symndx < symtab_hdr->sh_info)
585 h = NULL;
586 else
587 {
588 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
589 while (h->root.type == bfd_link_hash_indirect
590 || h->root.type == bfd_link_hash_warning)
591 h = (struct elf_link_hash_entry *) h->root.u.i.link;
592 }
593
594 switch (ELF32_R_TYPE (rel->r_info))
595 {
596 case R_VAX_GOT32:
597 BFD_ASSERT (h != NULL);
598
599 /* If this is a local symbol, we resolve it directly without
600 creating a global offset table entry. */
601 if (h->forced_local
602 || h == elf_hash_table (info)->hgot
603 || h == elf_hash_table (info)->hplt)
604 break;
605
606 /* This symbol requires a global offset table entry. */
607
608 if (dynobj == NULL)
609 {
610 /* Create the .got section. */
611 elf_hash_table (info)->dynobj = dynobj = abfd;
612 if (!_bfd_elf_create_got_section (dynobj, info))
613 return FALSE;
614 }
615
616 if (h != NULL)
617 {
618 struct elf_vax_link_hash_entry *eh;
619
620 eh = (struct elf_vax_link_hash_entry *) h;
621 if (h->got.refcount == -1)
622 {
623 h->got.refcount = 1;
624 eh->got_addend = rel->r_addend;
625 }
626 else
627 {
628 h->got.refcount++;
629 if (eh->got_addend != (bfd_vma) rel->r_addend)
630 _bfd_error_handler
631 /* xgettext:c-format */
632 (_("%pB: warning: GOT addend of %" PRId64 " to `%s' does"
633 " not match previous GOT addend of %" PRId64),
634 abfd, (int64_t) rel->r_addend, h->root.root.string,
635 (int64_t) eh->got_addend);
636
637 }
638 }
639 break;
640
641 case R_VAX_PLT32:
642 /* This symbol requires a procedure linkage table entry. We
643 actually build the entry in adjust_dynamic_symbol,
644 because this might be a case of linking PIC code which is
645 never referenced by a dynamic object, in which case we
646 don't need to generate a procedure linkage table entry
647 after all. */
648 BFD_ASSERT (h != NULL);
649
650 /* If this is a local symbol, we resolve it directly without
651 creating a procedure linkage table entry. */
652 if (h->forced_local)
653 break;
654
655 h->needs_plt = 1;
656 if (h->plt.refcount == -1)
657 h->plt.refcount = 1;
658 else
659 h->plt.refcount++;
660 break;
661
662 case R_VAX_PC8:
663 case R_VAX_PC16:
664 case R_VAX_PC32:
665 /* If we are creating a shared library and this is not a local
666 symbol, we need to copy the reloc into the shared library.
667 However when linking with -Bsymbolic and this is a global
668 symbol which is defined in an object we are including in the
669 link (i.e., DEF_REGULAR is set), then we can resolve the
670 reloc directly. At this point we have not seen all the input
671 files, so it is possible that DEF_REGULAR is not set now but
672 will be set later (it is never cleared). We account for that
673 possibility below by storing information in the
674 pcrel_relocs_copied field of the hash table entry. */
675 if (!(bfd_link_pic (info)
676 && (sec->flags & SEC_ALLOC) != 0
677 && h != NULL
678 && (!info->symbolic
679 || !h->def_regular)))
680 {
681 if (h != NULL
682 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
683 && !h->forced_local)
684 {
685 /* Make sure a plt entry is created for this symbol if
686 it turns out to be a function defined by a dynamic
687 object. */
688 if (h->plt.refcount == -1)
689 h->plt.refcount = 1;
690 else
691 h->plt.refcount++;
692 }
693 break;
694 }
695 /* If this is a local symbol, we can resolve it directly. */
696 if (h != NULL
697 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
698 || h->forced_local))
699 break;
700
701 /* Fall through. */
702 case R_VAX_8:
703 case R_VAX_16:
704 case R_VAX_32:
705 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
706 {
707 /* Make sure a plt entry is created for this symbol if it
708 turns out to be a function defined by a dynamic object. */
709 if (h->plt.refcount == -1)
710 h->plt.refcount = 1;
711 else
712 h->plt.refcount++;
713 }
714
715 /* If we are creating a shared library, we need to copy the
716 reloc into the shared library. */
717 if (bfd_link_pic (info)
718 && (sec->flags & SEC_ALLOC) != 0)
719 {
720 /* When creating a shared object, we must copy these
721 reloc types into the output file. We create a reloc
722 section in dynobj and make room for this reloc. */
723 if (sreloc == NULL)
724 {
725 sreloc = _bfd_elf_make_dynamic_reloc_section
726 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
727
728 if (sreloc == NULL)
729 return FALSE;
730
731 if (sec->flags & SEC_READONLY)
732 info->flags |= DF_TEXTREL;
733 }
734
735 sreloc->size += sizeof (Elf32_External_Rela);
736
737 /* If we are linking with -Bsymbolic, we count the number of
738 PC relative relocations we have entered for this symbol,
739 so that we can discard them again if the symbol is later
740 defined by a regular object. Note that this function is
741 only called if we are using a vaxelf linker hash table,
742 which means that h is really a pointer to an
743 elf_vax_link_hash_entry. */
744 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
745 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
746 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
747 && info->symbolic)
748 {
749 struct elf_vax_link_hash_entry *eh;
750 struct elf_vax_pcrel_relocs_copied *p;
751
752 eh = (struct elf_vax_link_hash_entry *) h;
753
754 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
755 if (p->section == sreloc)
756 break;
757
758 if (p == NULL)
759 {
760 p = ((struct elf_vax_pcrel_relocs_copied *)
761 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
762 if (p == NULL)
763 return FALSE;
764 p->next = eh->pcrel_relocs_copied;
765 eh->pcrel_relocs_copied = p;
766 p->section = sreloc;
767 p->count = 0;
768 }
769
770 ++p->count;
771 }
772 }
773
774 break;
775
776 /* This relocation describes the C++ object vtable hierarchy.
777 Reconstruct it for later use during GC. */
778 case R_VAX_GNU_VTINHERIT:
779 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
780 return FALSE;
781 break;
782
783 /* This relocation describes which C++ vtable entries are actually
784 used. Record for later use during GC. */
785 case R_VAX_GNU_VTENTRY:
786 BFD_ASSERT (h != NULL);
787 if (h != NULL
788 && !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 bfd_boolean
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 /* We must allocate the symbol in our .dynbss section, which will
935 become part of the .bss section of the executable. There will be
936 an entry for this symbol in the .dynsym section. The dynamic
937 object will contain position independent code, so all references
938 from the dynamic object to this symbol will go through the global
939 offset table. The dynamic linker will use the .dynsym entry to
940 determine the address it must put in the global offset table, so
941 both the dynamic object and the regular object will refer to the
942 same memory location for the variable. */
943
944 s = bfd_get_linker_section (dynobj, ".dynbss");
945 BFD_ASSERT (s != NULL);
946
947 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
948 copy the initial value out of the dynamic object and into the
949 runtime process image. We need to remember the offset into the
950 .rela.bss section we are going to use. */
951 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
952 {
953 asection *srel;
954
955 srel = bfd_get_linker_section (dynobj, ".rela.bss");
956 BFD_ASSERT (srel != NULL);
957 srel->size += sizeof (Elf32_External_Rela);
958 h->needs_copy = 1;
959 }
960
961 return _bfd_elf_adjust_dynamic_copy (info, h, s);
962 }
963
964 /* This function is called via elf_link_hash_traverse. It resets GOT
965 and PLT (.GOT) reference counts back to -1 so normal PC32 relocation
966 will be done. */
967
968 static bfd_boolean
969 elf_vax_discard_got_entries (struct elf_link_hash_entry *h,
970 void *infoptr ATTRIBUTE_UNUSED)
971 {
972 h->got.refcount = -1;
973 h->plt.refcount = -1;
974
975 return TRUE;
976 }
977
978 /* Discard unused dynamic data if this is a static link. */
979
980 static bfd_boolean
981 elf_vax_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
982 struct bfd_link_info *info)
983 {
984 bfd *dynobj;
985 asection *s;
986
987 dynobj = elf_hash_table (info)->dynobj;
988
989 if (dynobj && !elf_hash_table (info)->dynamic_sections_created)
990 {
991 /* We may have created entries in the .rela.got and .got sections.
992 However, if we are not creating the dynamic sections, we will
993 not actually use these entries. Reset the size of .rela.got
994 and .got, which will cause them to get stripped from the output
995 file below. */
996 s = elf_hash_table (info)->srelgot;
997 if (s != NULL)
998 s->size = 0;
999 s = elf_hash_table (info)->sgotplt;
1000 if (s != NULL)
1001 s->size = 0;
1002 s = elf_hash_table (info)->sgot;
1003 if (s != NULL)
1004 s->size = 0;
1005 }
1006
1007 /* If this is a static link, we need to discard all the got entries we've
1008 recorded. */
1009 if (!dynobj || !elf_hash_table (info)->dynamic_sections_created)
1010 elf_link_hash_traverse (elf_hash_table (info),
1011 elf_vax_discard_got_entries,
1012 info);
1013
1014 return TRUE;
1015 }
1016
1017 /* Set the sizes of the dynamic sections. */
1018
1019 static bfd_boolean
1020 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1021 {
1022 bfd *dynobj;
1023 asection *s;
1024 bfd_boolean plt;
1025 bfd_boolean relocs;
1026 bfd_boolean reltext;
1027
1028 dynobj = elf_hash_table (info)->dynobj;
1029 BFD_ASSERT (dynobj != NULL);
1030
1031 if (elf_hash_table (info)->dynamic_sections_created)
1032 {
1033 /* Set the contents of the .interp section to the interpreter. */
1034 if (bfd_link_executable (info) && !info->nointerp)
1035 {
1036 s = bfd_get_linker_section (dynobj, ".interp");
1037 BFD_ASSERT (s != NULL);
1038 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1039 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1040 }
1041 }
1042
1043 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1044 relative relocs against symbols defined in a regular object. We
1045 allocated space for them in the check_relocs routine, but we will not
1046 fill them in in the relocate_section routine. */
1047 if (bfd_link_pic (info) && info->symbolic)
1048 elf_vax_link_hash_traverse (elf_hash_table (info),
1049 elf_vax_discard_copies,
1050 NULL);
1051
1052 /* If this is a -Bsymbolic shared link, we need to discard all the got
1053 entries we've recorded. Otherwise, we need to instantiate (allocate
1054 space for them). */
1055 elf_link_hash_traverse (elf_hash_table (info),
1056 elf_vax_instantiate_got_entries,
1057 info);
1058
1059 /* The check_relocs and adjust_dynamic_symbol entry points have
1060 determined the sizes of the various dynamic sections. Allocate
1061 memory for them. */
1062 plt = FALSE;
1063 relocs = FALSE;
1064 reltext = FALSE;
1065 for (s = dynobj->sections; s != NULL; s = s->next)
1066 {
1067 const char *name;
1068
1069 if ((s->flags & SEC_LINKER_CREATED) == 0)
1070 continue;
1071
1072 /* It's OK to base decisions on the section name, because none
1073 of the dynobj section names depend upon the input files. */
1074 name = bfd_get_section_name (dynobj, s);
1075
1076 if (strcmp (name, ".plt") == 0)
1077 {
1078 /* Remember whether there is a PLT. */
1079 plt = s->size != 0;
1080 }
1081 else if (CONST_STRNEQ (name, ".rela"))
1082 {
1083 if (s->size != 0)
1084 {
1085 asection *target;
1086
1087 /* Remember whether there are any reloc sections other
1088 than .rela.plt. */
1089 if (strcmp (name, ".rela.plt") != 0)
1090 {
1091 const char *outname;
1092
1093 relocs = TRUE;
1094
1095 /* If this relocation section applies to a read only
1096 section, then we probably need a DT_TEXTREL
1097 entry. .rela.plt is actually associated with
1098 .got.plt, which is never readonly. */
1099 outname = bfd_get_section_name (output_bfd,
1100 s->output_section);
1101 target = bfd_get_section_by_name (output_bfd, outname + 5);
1102 if (target != NULL
1103 && (target->flags & SEC_READONLY) != 0
1104 && (target->flags & SEC_ALLOC) != 0)
1105 reltext = TRUE;
1106 }
1107
1108 /* We use the reloc_count field as a counter if we need
1109 to copy relocs into the output file. */
1110 s->reloc_count = 0;
1111 }
1112 }
1113 else if (! CONST_STRNEQ (name, ".got")
1114 && strcmp (name, ".dynbss") != 0)
1115 {
1116 /* It's not one of our sections, so don't allocate space. */
1117 continue;
1118 }
1119
1120 if (s->size == 0)
1121 {
1122 /* If we don't need this section, strip it from the
1123 output file. This is mostly to handle .rela.bss and
1124 .rela.plt. We must create both sections in
1125 create_dynamic_sections, because they must be created
1126 before the linker maps input sections to output
1127 sections. The linker does that before
1128 adjust_dynamic_symbol is called, and it is that
1129 function which decides whether anything needs to go
1130 into these sections. */
1131 s->flags |= SEC_EXCLUDE;
1132 continue;
1133 }
1134
1135 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1136 continue;
1137
1138 /* Allocate memory for the section contents. */
1139 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1140 if (s->contents == NULL)
1141 return FALSE;
1142 }
1143
1144 if (elf_hash_table (info)->dynamic_sections_created)
1145 {
1146 /* Add some entries to the .dynamic section. We fill in the
1147 values later, in elf_vax_finish_dynamic_sections, but we
1148 must add the entries now so that we get the correct size for
1149 the .dynamic section. The DT_DEBUG entry is filled in by the
1150 dynamic linker and used by the debugger. */
1151 #define add_dynamic_entry(TAG, VAL) \
1152 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1153
1154 if (!bfd_link_pic (info))
1155 {
1156 if (!add_dynamic_entry (DT_DEBUG, 0))
1157 return FALSE;
1158 }
1159
1160 if (plt)
1161 {
1162 if (!add_dynamic_entry (DT_PLTGOT, 0)
1163 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1164 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1165 || !add_dynamic_entry (DT_JMPREL, 0))
1166 return FALSE;
1167 }
1168
1169 if (relocs)
1170 {
1171 if (!add_dynamic_entry (DT_RELA, 0)
1172 || !add_dynamic_entry (DT_RELASZ, 0)
1173 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1174 return FALSE;
1175 }
1176
1177 if (reltext || (info->flags & DF_TEXTREL) != 0)
1178 {
1179 if (!add_dynamic_entry (DT_TEXTREL, 0))
1180 return FALSE;
1181 }
1182 }
1183 #undef add_dynamic_entry
1184
1185 return TRUE;
1186 }
1187
1188 /* This function is called via elf_vax_link_hash_traverse if we are
1189 creating a shared object with -Bsymbolic. It discards the space
1190 allocated to copy PC relative relocs against symbols which are defined
1191 in regular objects. We allocated space for them in the check_relocs
1192 routine, but we won't fill them in in the relocate_section routine. */
1193
1194 static bfd_boolean
1195 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1196 void * ignore ATTRIBUTE_UNUSED)
1197 {
1198 struct elf_vax_pcrel_relocs_copied *s;
1199
1200 /* We only discard relocs for symbols defined in a regular object. */
1201 if (!h->root.def_regular)
1202 return TRUE;
1203
1204 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1205 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1206
1207 return TRUE;
1208 }
1209
1210 /* This function is called via elf_link_hash_traverse. It looks for
1211 entries that have GOT or PLT (.GOT) references. If creating a shared
1212 object with -Bsymbolic, or the symbol has been forced local, then it
1213 resets the reference count back to -1 so normal PC32 relocation will
1214 be done. Otherwise space in the .got and .rela.got will be reserved
1215 for the symbol. */
1216
1217 static bfd_boolean
1218 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr)
1219 {
1220 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1221 bfd *dynobj;
1222 asection *sgot;
1223 asection *srelgot;
1224
1225 /* We don't care about non-GOT (and non-PLT) entries. */
1226 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1227 return TRUE;
1228
1229 dynobj = elf_hash_table (info)->dynobj;
1230 BFD_ASSERT (dynobj != NULL);
1231
1232 sgot = elf_hash_table (info)->sgot;
1233 srelgot = elf_hash_table (info)->srelgot;
1234
1235 if (SYMBOL_REFERENCES_LOCAL (info, h))
1236 {
1237 h->got.refcount = -1;
1238 h->plt.refcount = -1;
1239 }
1240 else if (h->got.refcount > 0)
1241 {
1242 /* Make sure this symbol is output as a dynamic symbol. */
1243 if (h->dynindx == -1)
1244 {
1245 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1246 return FALSE;
1247 }
1248
1249 /* Allocate space in the .got and .rela.got sections. */
1250 sgot->size += 4;
1251 srelgot->size += sizeof (Elf32_External_Rela);
1252 }
1253
1254 return TRUE;
1255 }
1256
1257 /* Relocate an VAX ELF section. */
1258
1259 static bfd_boolean
1260 elf_vax_relocate_section (bfd *output_bfd,
1261 struct bfd_link_info *info,
1262 bfd *input_bfd,
1263 asection *input_section,
1264 bfd_byte *contents,
1265 Elf_Internal_Rela *relocs,
1266 Elf_Internal_Sym *local_syms,
1267 asection **local_sections)
1268 {
1269 Elf_Internal_Shdr *symtab_hdr;
1270 struct elf_link_hash_entry **sym_hashes;
1271 bfd_vma plt_index;
1272 bfd_vma got_offset;
1273 asection *sgot;
1274 asection *splt;
1275 asection *sgotplt;
1276 asection *sreloc;
1277 Elf_Internal_Rela *rel;
1278 Elf_Internal_Rela *relend;
1279
1280 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1281 sym_hashes = elf_sym_hashes (input_bfd);
1282
1283 sgot = NULL;
1284 splt = NULL;
1285 sgotplt = NULL;
1286 sreloc = NULL;
1287
1288 rel = relocs;
1289 relend = relocs + input_section->reloc_count;
1290 for (; rel < relend; rel++)
1291 {
1292 int r_type;
1293 reloc_howto_type *howto;
1294 unsigned long r_symndx;
1295 struct elf_link_hash_entry *h;
1296 Elf_Internal_Sym *sym;
1297 asection *sec;
1298 bfd_vma relocation;
1299 bfd_reloc_status_type r;
1300
1301 r_type = ELF32_R_TYPE (rel->r_info);
1302 if (r_type < 0 || r_type >= (int) R_VAX_max)
1303 {
1304 bfd_set_error (bfd_error_bad_value);
1305 return FALSE;
1306 }
1307 howto = howto_table + r_type;
1308
1309 r_symndx = ELF32_R_SYM (rel->r_info);
1310 h = NULL;
1311 sym = NULL;
1312 sec = NULL;
1313 if (r_symndx < symtab_hdr->sh_info)
1314 {
1315 sym = local_syms + r_symndx;
1316 sec = local_sections[r_symndx];
1317 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1318 }
1319 else
1320 {
1321 bfd_boolean unresolved_reloc;
1322 bfd_boolean warned, ignored;
1323
1324 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1325 r_symndx, symtab_hdr, sym_hashes,
1326 h, sec, relocation,
1327 unresolved_reloc, warned, ignored);
1328
1329 if ((h->root.type == bfd_link_hash_defined
1330 || h->root.type == bfd_link_hash_defweak)
1331 && ((r_type == R_VAX_PLT32
1332 && h->plt.offset != (bfd_vma) -1
1333 && !h->forced_local
1334 && elf_hash_table (info)->dynamic_sections_created)
1335 || (r_type == R_VAX_GOT32
1336 && h->got.offset != (bfd_vma) -1
1337 && !h->forced_local
1338 && elf_hash_table (info)->dynamic_sections_created
1339 && (! bfd_link_pic (info)
1340 || (! info->symbolic && h->dynindx != -1)
1341 || !h->def_regular))
1342 || (bfd_link_pic (info)
1343 && ((! info->symbolic && h->dynindx != -1)
1344 || !h->def_regular)
1345 && ((input_section->flags & SEC_ALLOC) != 0
1346 /* DWARF will emit R_VAX_32 relocations in its
1347 sections against symbols defined externally
1348 in shared libraries. We can't do anything
1349 with them here. */
1350
1351 || ((input_section->flags & SEC_DEBUGGING) != 0
1352 && h->def_dynamic))
1353 && (r_type == R_VAX_8
1354 || r_type == R_VAX_16
1355 || r_type == R_VAX_32))))
1356 /* In these cases, we don't need the relocation
1357 value. We check specially because in some
1358 obscure cases sec->output_section will be NULL. */
1359 relocation = 0;
1360 }
1361
1362 if (sec != NULL && discarded_section (sec))
1363 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1364 rel, 1, relend, howto, 0, contents);
1365
1366 if (bfd_link_relocatable (info))
1367 continue;
1368
1369 switch (r_type)
1370 {
1371 case R_VAX_GOT32:
1372 /* Relocation is to the address of the entry for this symbol
1373 in the global offset table. */
1374
1375 /* Resolve a GOTxx reloc against a local symbol directly,
1376 without using the global offset table. */
1377 if (h == NULL
1378 || h->got.offset == (bfd_vma) -1)
1379 break;
1380
1381 {
1382 bfd_vma off;
1383
1384 sgot = elf_hash_table (info)->sgot;
1385 BFD_ASSERT (sgot != NULL);
1386
1387 off = h->got.offset;
1388 BFD_ASSERT (off < sgot->size);
1389
1390 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1391
1392 relocation = sgot->output_offset + off;
1393 /* The GOT relocation uses the addend. */
1394 rel->r_addend = 0;
1395
1396 /* Change the reference to be indirect. */
1397 contents[rel->r_offset - 1] |= 0x10;
1398 relocation += sgot->output_section->vma;
1399 }
1400 break;
1401
1402 case R_VAX_PC32:
1403 /* If we are creating an executable and the function this
1404 reloc refers to is in a shared lib, then we made a PLT
1405 entry for this symbol and need to handle the reloc like
1406 a PLT reloc. */
1407 if (bfd_link_pic (info))
1408 goto r_vax_pc32_shared;
1409 /* Fall through. */
1410 case R_VAX_PLT32:
1411 /* Relocation is to the entry for this symbol in the
1412 procedure linkage table. */
1413
1414 /* Resolve a PLTxx reloc against a local symbol directly,
1415 without using the procedure linkage table. */
1416 if (h == NULL
1417 || h->plt.offset == (bfd_vma) -1)
1418 break;
1419
1420 splt = elf_hash_table (info)->splt;
1421 BFD_ASSERT (splt != NULL);
1422
1423 sgotplt = elf_hash_table (info)->sgotplt;
1424 BFD_ASSERT (sgotplt != NULL);
1425
1426 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1427
1428 /* Get the offset into the .got table of the entry that
1429 corresponds to this function. Each .got entry is 4 bytes.
1430 The first two are reserved. */
1431 got_offset = (plt_index + 3) * 4;
1432
1433 /* We want the relocation to point into the .got.plt instead
1434 of the plt itself. */
1435 relocation = (sgotplt->output_section->vma
1436 + sgotplt->output_offset
1437 + got_offset);
1438 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1439 if (rel->r_addend == 2)
1440 {
1441 h->plt.offset |= 1;
1442 }
1443 else if (rel->r_addend != 0)
1444 _bfd_error_handler
1445 /* xgettext:c-format */
1446 (_("%pB: warning: PLT addend of %" PRId64 " to `%s'"
1447 " from %pA section ignored"),
1448 input_bfd, (int64_t) rel->r_addend, h->root.root.string,
1449 input_section);
1450 rel->r_addend = 0;
1451
1452 break;
1453
1454 case R_VAX_PC8:
1455 case R_VAX_PC16:
1456 r_vax_pc32_shared:
1457 if (h == NULL
1458 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1459 || h->forced_local)
1460 break;
1461 /* Fall through. */
1462 case R_VAX_8:
1463 case R_VAX_16:
1464 case R_VAX_32:
1465 if (bfd_link_pic (info)
1466 && r_symndx != STN_UNDEF
1467 && (input_section->flags & SEC_ALLOC) != 0
1468 && ((r_type != R_VAX_PC8
1469 && r_type != R_VAX_PC16
1470 && r_type != R_VAX_PC32)
1471 || ((input_section->flags & SEC_CODE)
1472 && (!info->symbolic
1473 || (!h->def_regular && h->type != STT_SECTION)))))
1474 {
1475 Elf_Internal_Rela outrel;
1476 bfd_byte *loc;
1477 bfd_boolean skip, relocate;
1478
1479 /* When generating a shared object, these relocations
1480 are copied into the output file to be resolved at run
1481 time. */
1482 if (sreloc == NULL)
1483 {
1484 sreloc = _bfd_elf_get_dynamic_reloc_section
1485 (input_bfd, input_section, /*rela?*/ TRUE);
1486 if (sreloc == NULL)
1487 return FALSE;
1488 }
1489
1490 skip = FALSE;
1491 relocate = FALSE;
1492
1493 outrel.r_offset =
1494 _bfd_elf_section_offset (output_bfd, info, input_section,
1495 rel->r_offset);
1496 if (outrel.r_offset == (bfd_vma) -1)
1497 skip = TRUE;
1498 if (outrel.r_offset == (bfd_vma) -2)
1499 skip = TRUE, relocate = TRUE;
1500 outrel.r_offset += (input_section->output_section->vma
1501 + input_section->output_offset);
1502
1503 if (skip)
1504 memset (&outrel, 0, sizeof outrel);
1505 /* h->dynindx may be -1 if the symbol was marked to
1506 become local. */
1507 else if (h != NULL
1508 && ((! info->symbolic && h->dynindx != -1)
1509 || !h->def_regular))
1510 {
1511 BFD_ASSERT (h->dynindx != -1);
1512 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1513 outrel.r_addend = relocation + rel->r_addend;
1514 }
1515 else
1516 {
1517 if (r_type == R_VAX_32)
1518 {
1519 relocate = TRUE;
1520 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1521 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1522 &contents[rel->r_offset]) == 0);
1523 outrel.r_addend = relocation + rel->r_addend;
1524 }
1525 else
1526 {
1527 long indx;
1528
1529 if (bfd_is_abs_section (sec))
1530 indx = 0;
1531 else if (sec == NULL || sec->owner == NULL)
1532 {
1533 bfd_set_error (bfd_error_bad_value);
1534 return FALSE;
1535 }
1536 else
1537 {
1538 asection *osec;
1539
1540 /* We are turning this relocation into one
1541 against a section symbol. It would be
1542 proper to subtract the symbol's value,
1543 osec->vma, from the emitted reloc addend,
1544 but ld.so expects buggy relocs. */
1545 osec = sec->output_section;
1546 indx = elf_section_data (osec)->dynindx;
1547 if (indx == 0)
1548 {
1549 struct elf_link_hash_table *htab;
1550 htab = elf_hash_table (info);
1551 osec = htab->text_index_section;
1552 indx = elf_section_data (osec)->dynindx;
1553 }
1554 BFD_ASSERT (indx != 0);
1555 }
1556
1557 outrel.r_info = ELF32_R_INFO (indx, r_type);
1558 outrel.r_addend = relocation + rel->r_addend;
1559 }
1560 }
1561
1562 if ((input_section->flags & SEC_CODE) != 0
1563 || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32
1564 && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE
1565 && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY
1566 && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT
1567 && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT))
1568 {
1569 if (h != NULL)
1570 _bfd_error_handler
1571 /* xgettext:c-format */
1572 (_("%pB: warning: %s relocation against symbol `%s'"
1573 " from %pA section"),
1574 input_bfd, howto->name, h->root.root.string,
1575 input_section);
1576 else
1577 _bfd_error_handler
1578 /* xgettext:c-format */
1579 (_("%pB: warning: %s relocation to %#" PRIx64
1580 " from %pA section"),
1581 input_bfd, howto->name, (uint64_t) outrel.r_addend,
1582 input_section);
1583 }
1584 loc = sreloc->contents;
1585 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1586 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1587
1588 /* This reloc will be computed at runtime, so there's no
1589 need to do anything now, except for R_VAX_32
1590 relocations that have been turned into
1591 R_VAX_RELATIVE. */
1592 if (!relocate)
1593 continue;
1594 }
1595
1596 break;
1597
1598 case R_VAX_GNU_VTINHERIT:
1599 case R_VAX_GNU_VTENTRY:
1600 /* These are no-ops in the end. */
1601 continue;
1602
1603 default:
1604 break;
1605 }
1606
1607 /* VAX PCREL relocations are from the end of relocation, not the start.
1608 So subtract the difference from the relocation amount since we can't
1609 add it to the offset. */
1610 if (howto->pc_relative && howto->pcrel_offset)
1611 relocation -= bfd_get_reloc_size(howto);
1612
1613 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1614 contents, rel->r_offset,
1615 relocation, rel->r_addend);
1616
1617 if (r != bfd_reloc_ok)
1618 {
1619 switch (r)
1620 {
1621 default:
1622 case bfd_reloc_outofrange:
1623 abort ();
1624 case bfd_reloc_overflow:
1625 {
1626 const char *name;
1627
1628 if (h != NULL)
1629 name = NULL;
1630 else
1631 {
1632 name = bfd_elf_string_from_elf_section (input_bfd,
1633 symtab_hdr->sh_link,
1634 sym->st_name);
1635 if (name == NULL)
1636 return FALSE;
1637 if (*name == '\0')
1638 name = bfd_section_name (input_bfd, sec);
1639 }
1640 info->callbacks->reloc_overflow
1641 (info, (h ? &h->root : NULL), name, howto->name,
1642 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1643 }
1644 break;
1645 }
1646 }
1647 }
1648
1649 return TRUE;
1650 }
1651
1652 /* Finish up dynamic symbol handling. We set the contents of various
1653 dynamic sections here. */
1654
1655 static bfd_boolean
1656 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1657 struct elf_link_hash_entry *h,
1658 Elf_Internal_Sym *sym)
1659 {
1660 bfd *dynobj;
1661
1662 dynobj = elf_hash_table (info)->dynobj;
1663
1664 if (h->plt.offset != (bfd_vma) -1)
1665 {
1666 asection *splt;
1667 asection *sgot;
1668 asection *srela;
1669 bfd_vma plt_index;
1670 bfd_vma got_offset;
1671 bfd_vma addend;
1672 Elf_Internal_Rela rela;
1673 bfd_byte *loc;
1674
1675 /* This symbol has an entry in the procedure linkage table. Set
1676 it up. */
1677 BFD_ASSERT (h->dynindx != -1);
1678
1679 splt = elf_hash_table (info)->splt;
1680 sgot = elf_hash_table (info)->sgotplt;
1681 srela = elf_hash_table (info)->srelplt;
1682 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1683
1684 addend = 2 * (h->plt.offset & 1);
1685 h->plt.offset &= ~1;
1686
1687 /* Get the index in the procedure linkage table which
1688 corresponds to this symbol. This is the index of this symbol
1689 in all the symbols for which we are making plt entries. The
1690 first entry in the procedure linkage table is reserved. */
1691 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1692
1693 /* Get the offset into the .got table of the entry that
1694 corresponds to this function. Each .got entry is 4 bytes.
1695 The first two are reserved. */
1696 got_offset = (plt_index + 3) * 4;
1697
1698 /* Fill in the entry in the procedure linkage table. */
1699 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1700 PLT_ENTRY_SIZE);
1701
1702 /* The offset is relative to the first extension word. */
1703 bfd_put_32 (output_bfd,
1704 -(h->plt.offset + 8),
1705 splt->contents + h->plt.offset + 4);
1706
1707 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1708 splt->contents + h->plt.offset + 8);
1709
1710 /* Fill in the entry in the global offset table. */
1711 bfd_put_32 (output_bfd,
1712 (splt->output_section->vma
1713 + splt->output_offset
1714 + h->plt.offset) + addend,
1715 sgot->contents + got_offset);
1716
1717 /* Fill in the entry in the .rela.plt section. */
1718 rela.r_offset = (sgot->output_section->vma
1719 + sgot->output_offset
1720 + got_offset);
1721 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1722 rela.r_addend = addend;
1723 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1724 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1725
1726 if (!h->def_regular)
1727 {
1728 /* Mark the symbol as undefined, rather than as defined in
1729 the .plt section. Leave the value alone. */
1730 sym->st_shndx = SHN_UNDEF;
1731 }
1732 }
1733
1734 if (h->got.offset != (bfd_vma) -1)
1735 {
1736 asection *sgot;
1737 asection *srela;
1738 Elf_Internal_Rela rela;
1739 bfd_byte *loc;
1740
1741 /* This symbol has an entry in the global offset table. Set it
1742 up. */
1743 sgot = elf_hash_table (info)->sgot;
1744 srela = elf_hash_table (info)->srelgot;
1745 BFD_ASSERT (sgot != NULL && srela != NULL);
1746
1747 rela.r_offset = (sgot->output_section->vma
1748 + sgot->output_offset
1749 + h->got.offset);
1750 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1751 rela.r_addend = bfd_get_signed_32 (output_bfd,
1752 sgot->contents + h->got.offset);
1753
1754 loc = srela->contents;
1755 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1756 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1757 }
1758
1759 if (h->needs_copy)
1760 {
1761 asection *s;
1762 Elf_Internal_Rela rela;
1763 bfd_byte *loc;
1764
1765 /* This symbol needs a copy reloc. Set it up. */
1766 BFD_ASSERT (h->dynindx != -1
1767 && (h->root.type == bfd_link_hash_defined
1768 || h->root.type == bfd_link_hash_defweak));
1769
1770 s = bfd_get_linker_section (dynobj, ".rela.bss");
1771 BFD_ASSERT (s != NULL);
1772
1773 rela.r_offset = (h->root.u.def.value
1774 + h->root.u.def.section->output_section->vma
1775 + h->root.u.def.section->output_offset);
1776 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1777 rela.r_addend = 0;
1778 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1779 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1780 }
1781
1782 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1783 if (h == elf_hash_table (info)->hdynamic
1784 || h == elf_hash_table (info)->hgot)
1785 sym->st_shndx = SHN_ABS;
1786
1787 return TRUE;
1788 }
1789
1790 /* Finish up the dynamic sections. */
1791
1792 static bfd_boolean
1793 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1794 {
1795 bfd *dynobj;
1796 asection *sgot;
1797 asection *sdyn;
1798
1799 dynobj = elf_hash_table (info)->dynobj;
1800
1801 sgot = elf_hash_table (info)->sgotplt;
1802 BFD_ASSERT (sgot != NULL);
1803 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
1804
1805 if (elf_hash_table (info)->dynamic_sections_created)
1806 {
1807 asection *splt;
1808 Elf32_External_Dyn *dyncon, *dynconend;
1809
1810 splt = elf_hash_table (info)->splt;
1811 BFD_ASSERT (splt != NULL && sdyn != NULL);
1812
1813 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1814 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1815 for (; dyncon < dynconend; dyncon++)
1816 {
1817 Elf_Internal_Dyn dyn;
1818 asection *s;
1819
1820 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1821
1822 switch (dyn.d_tag)
1823 {
1824 default:
1825 break;
1826
1827 case DT_PLTGOT:
1828 s = elf_hash_table (info)->sgotplt;
1829 goto get_vma;
1830 case DT_JMPREL:
1831 s = elf_hash_table (info)->srelplt;
1832 get_vma:
1833 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
1834 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1835 break;
1836
1837 case DT_PLTRELSZ:
1838 s = elf_hash_table (info)->srelplt;
1839 dyn.d_un.d_val = s->size;
1840 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1841 break;
1842 }
1843 }
1844
1845 /* Fill in the first entry in the procedure linkage table. */
1846 if (splt->size > 0)
1847 {
1848 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
1849 bfd_put_32 (output_bfd,
1850 (sgot->output_section->vma
1851 + sgot->output_offset + 4
1852 - (splt->output_section->vma + 6)),
1853 splt->contents + 2);
1854 bfd_put_32 (output_bfd,
1855 (sgot->output_section->vma
1856 + sgot->output_offset + 8
1857 - (splt->output_section->vma + 12)),
1858 splt->contents + 8);
1859 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1860 = PLT_ENTRY_SIZE;
1861 }
1862 }
1863
1864 /* Fill in the first three entries in the global offset table. */
1865 if (sgot->size > 0)
1866 {
1867 if (sdyn == NULL)
1868 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1869 else
1870 bfd_put_32 (output_bfd,
1871 sdyn->output_section->vma + sdyn->output_offset,
1872 sgot->contents);
1873 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1874 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1875 }
1876
1877 if (elf_section_data (sgot->output_section) != NULL)
1878 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1879
1880 return TRUE;
1881 }
1882
1883 static enum elf_reloc_type_class
1884 elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
1885 const asection *rel_sec ATTRIBUTE_UNUSED,
1886 const Elf_Internal_Rela *rela)
1887 {
1888 switch ((int) ELF32_R_TYPE (rela->r_info))
1889 {
1890 case R_VAX_RELATIVE:
1891 return reloc_class_relative;
1892 case R_VAX_JMP_SLOT:
1893 return reloc_class_plt;
1894 case R_VAX_COPY:
1895 return reloc_class_copy;
1896 default:
1897 return reloc_class_normal;
1898 }
1899 }
1900
1901 static bfd_vma
1902 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
1903 const arelent *rel ATTRIBUTE_UNUSED)
1904 {
1905 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
1906 }
1907
1908 #define TARGET_LITTLE_SYM vax_elf32_vec
1909 #define TARGET_LITTLE_NAME "elf32-vax"
1910 #define ELF_MACHINE_CODE EM_VAX
1911 #define ELF_MAXPAGESIZE 0x1000
1912
1913 #define elf_backend_create_dynamic_sections \
1914 _bfd_elf_create_dynamic_sections
1915 #define bfd_elf32_bfd_link_hash_table_create \
1916 elf_vax_link_hash_table_create
1917 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
1918
1919 #define elf_backend_check_relocs elf_vax_check_relocs
1920 #define elf_backend_adjust_dynamic_symbol \
1921 elf_vax_adjust_dynamic_symbol
1922 #define elf_backend_always_size_sections \
1923 elf_vax_always_size_sections
1924 #define elf_backend_size_dynamic_sections \
1925 elf_vax_size_dynamic_sections
1926 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
1927 #define elf_backend_relocate_section elf_vax_relocate_section
1928 #define elf_backend_finish_dynamic_symbol \
1929 elf_vax_finish_dynamic_symbol
1930 #define elf_backend_finish_dynamic_sections \
1931 elf_vax_finish_dynamic_sections
1932 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
1933 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
1934 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
1935 #define bfd_elf32_bfd_merge_private_bfd_data \
1936 elf32_vax_merge_private_bfd_data
1937 #define bfd_elf32_bfd_set_private_flags \
1938 elf32_vax_set_private_flags
1939 #define bfd_elf32_bfd_print_private_bfd_data \
1940 elf32_vax_print_private_bfd_data
1941
1942 #define elf_backend_can_gc_sections 1
1943 #define elf_backend_want_got_plt 1
1944 #define elf_backend_plt_readonly 1
1945 #define elf_backend_want_plt_sym 0
1946 #define elf_backend_got_header_size 16
1947 #define elf_backend_rela_normal 1
1948 #define elf_backend_dtrel_excludes_plt 1
1949
1950 #include "elf32-target.h"
A mirror of the official binutils-gdb repository