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Pass ignored unresolved relocations to ld backend
[deliverable/binutils-gdb.git] / bfd / elf32-vax.c
1 /* VAX series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
5 Contributed by Matt Thomas <matt@3am-software.com>.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
23
24 #include "sysdep.h"
25 #include "bfd.h"
26 #include "bfdlink.h"
27 #include "libbfd.h"
28 #include "elf-bfd.h"
29 #include "elf/vax.h"
30
31 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
32 static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
33 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
34 struct bfd_hash_table *,
35 const char *);
36 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
37 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
38 asection *, const Elf_Internal_Rela *);
39 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
40 struct elf_link_hash_entry *);
41 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
42 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
43 bfd *, asection *, bfd_byte *,
44 Elf_Internal_Rela *,
45 Elf_Internal_Sym *, asection **);
46 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
47 struct elf_link_hash_entry *,
48 Elf_Internal_Sym *);
49 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
50 struct bfd_link_info *);
51 static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *,
52 const arelent *);
53
54 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
55 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
56 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, void *);
57
58 static reloc_howto_type howto_table[] = {
59 HOWTO (R_VAX_NONE, /* type */
60 0, /* rightshift */
61 0, /* size (0 = byte, 1 = short, 2 = long) */
62 0, /* bitsize */
63 FALSE, /* pc_relative */
64 0, /* bitpos */
65 complain_overflow_dont, /* complain_on_overflow */
66 bfd_elf_generic_reloc, /* special_function */
67 "R_VAX_NONE", /* name */
68 FALSE, /* partial_inplace */
69 0, /* src_mask */
70 0x00000000, /* dst_mask */
71 FALSE), /* pcrel_offset */
72
73 HOWTO (R_VAX_32, /* type */
74 0, /* rightshift */
75 2, /* size (0 = byte, 1 = short, 2 = long) */
76 32, /* bitsize */
77 FALSE, /* pc_relative */
78 0, /* bitpos */
79 complain_overflow_bitfield, /* complain_on_overflow */
80 bfd_elf_generic_reloc, /* special_function */
81 "R_VAX_32", /* name */
82 FALSE, /* partial_inplace */
83 0, /* src_mask */
84 0xffffffff, /* dst_mask */
85 FALSE), /* pcrel_offset */
86
87 HOWTO (R_VAX_16, /* type */
88 0, /* rightshift */
89 1, /* size (0 = byte, 1 = short, 2 = long) */
90 16, /* bitsize */
91 FALSE, /* pc_relative */
92 0, /* bitpos */
93 complain_overflow_bitfield, /* complain_on_overflow */
94 bfd_elf_generic_reloc, /* special_function */
95 "R_VAX_16", /* name */
96 FALSE, /* partial_inplace */
97 0, /* src_mask */
98 0x0000ffff, /* dst_mask */
99 FALSE), /* pcrel_offset */
100
101 HOWTO (R_VAX_8, /* type */
102 0, /* rightshift */
103 0, /* size (0 = byte, 1 = short, 2 = long) */
104 8, /* bitsize */
105 FALSE, /* pc_relative */
106 0, /* bitpos */
107 complain_overflow_bitfield, /* complain_on_overflow */
108 bfd_elf_generic_reloc, /* special_function */
109 "R_VAX_8", /* name */
110 FALSE, /* partial_inplace */
111 0, /* src_mask */
112 0x000000ff, /* dst_mask */
113 FALSE), /* pcrel_offset */
114
115 HOWTO (R_VAX_PC32, /* type */
116 0, /* rightshift */
117 2, /* size (0 = byte, 1 = short, 2 = long) */
118 32, /* bitsize */
119 TRUE, /* pc_relative */
120 0, /* bitpos */
121 complain_overflow_bitfield, /* complain_on_overflow */
122 bfd_elf_generic_reloc, /* special_function */
123 "R_VAX_PC32", /* name */
124 FALSE, /* partial_inplace */
125 0, /* src_mask */
126 0xffffffff, /* dst_mask */
127 TRUE), /* pcrel_offset */
128
129 HOWTO (R_VAX_PC16, /* type */
130 0, /* rightshift */
131 1, /* size (0 = byte, 1 = short, 2 = long) */
132 16, /* bitsize */
133 TRUE, /* pc_relative */
134 0, /* bitpos */
135 complain_overflow_signed, /* complain_on_overflow */
136 bfd_elf_generic_reloc, /* special_function */
137 "R_VAX_PC16", /* name */
138 FALSE, /* partial_inplace */
139 0, /* src_mask */
140 0x0000ffff, /* dst_mask */
141 TRUE), /* pcrel_offset */
142
143 HOWTO (R_VAX_PC8, /* type */
144 0, /* rightshift */
145 0, /* size (0 = byte, 1 = short, 2 = long) */
146 8, /* bitsize */
147 TRUE, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_signed, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_VAX_PC8", /* name */
152 FALSE, /* partial_inplace */
153 0, /* src_mask */
154 0x000000ff, /* dst_mask */
155 TRUE), /* pcrel_offset */
156
157 HOWTO (R_VAX_GOT32, /* type */
158 0, /* rightshift */
159 2, /* size (0 = byte, 1 = short, 2 = long) */
160 32, /* bitsize */
161 TRUE, /* pc_relative */
162 0, /* bitpos */
163 complain_overflow_bitfield, /* complain_on_overflow */
164 bfd_elf_generic_reloc, /* special_function */
165 "R_VAX_GOT32", /* name */
166 FALSE, /* partial_inplace */
167 0, /* src_mask */
168 0xffffffff, /* dst_mask */
169 TRUE), /* pcrel_offset */
170
171 EMPTY_HOWTO (-1),
172 EMPTY_HOWTO (-1),
173 EMPTY_HOWTO (-1),
174 EMPTY_HOWTO (-1),
175 EMPTY_HOWTO (-1),
176
177 HOWTO (R_VAX_PLT32, /* type */
178 0, /* rightshift */
179 2, /* size (0 = byte, 1 = short, 2 = long) */
180 32, /* bitsize */
181 TRUE, /* pc_relative */
182 0, /* bitpos */
183 complain_overflow_bitfield, /* complain_on_overflow */
184 bfd_elf_generic_reloc, /* special_function */
185 "R_VAX_PLT32", /* name */
186 FALSE, /* partial_inplace */
187 0, /* src_mask */
188 0xffffffff, /* dst_mask */
189 TRUE), /* pcrel_offset */
190
191 EMPTY_HOWTO (-1),
192 EMPTY_HOWTO (-1),
193 EMPTY_HOWTO (-1),
194 EMPTY_HOWTO (-1),
195 EMPTY_HOWTO (-1),
196
197 HOWTO (R_VAX_COPY, /* type */
198 0, /* rightshift */
199 0, /* size (0 = byte, 1 = short, 2 = long) */
200 0, /* bitsize */
201 FALSE, /* pc_relative */
202 0, /* bitpos */
203 complain_overflow_dont, /* complain_on_overflow */
204 bfd_elf_generic_reloc, /* special_function */
205 "R_VAX_COPY", /* name */
206 FALSE, /* partial_inplace */
207 0, /* src_mask */
208 0xffffffff, /* dst_mask */
209 FALSE), /* pcrel_offset */
210
211 HOWTO (R_VAX_GLOB_DAT, /* type */
212 0, /* rightshift */
213 2, /* size (0 = byte, 1 = short, 2 = long) */
214 32, /* bitsize */
215 FALSE, /* pc_relative */
216 0, /* bitpos */
217 complain_overflow_dont, /* complain_on_overflow */
218 bfd_elf_generic_reloc, /* special_function */
219 "R_VAX_GLOB_DAT", /* name */
220 FALSE, /* partial_inplace */
221 0, /* src_mask */
222 0xffffffff, /* dst_mask */
223 FALSE), /* pcrel_offset */
224
225 HOWTO (R_VAX_JMP_SLOT, /* type */
226 0, /* rightshift */
227 2, /* size (0 = byte, 1 = short, 2 = long) */
228 32, /* bitsize */
229 FALSE, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_dont, /* complain_on_overflow */
232 bfd_elf_generic_reloc, /* special_function */
233 "R_VAX_JMP_SLOT", /* name */
234 FALSE, /* partial_inplace */
235 0, /* src_mask */
236 0xffffffff, /* dst_mask */
237 FALSE), /* pcrel_offset */
238
239 HOWTO (R_VAX_RELATIVE, /* type */
240 0, /* rightshift */
241 2, /* size (0 = byte, 1 = short, 2 = long) */
242 32, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_dont, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_VAX_RELATIVE", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffffffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* GNU extension to record C++ vtable hierarchy */
254 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
255 0, /* rightshift */
256 2, /* size (0 = byte, 1 = short, 2 = long) */
257 0, /* bitsize */
258 FALSE, /* pc_relative */
259 0, /* bitpos */
260 complain_overflow_dont, /* complain_on_overflow */
261 NULL, /* special_function */
262 "R_VAX_GNU_VTINHERIT", /* name */
263 FALSE, /* partial_inplace */
264 0, /* src_mask */
265 0, /* dst_mask */
266 FALSE), /* pcrel_offset */
267
268 /* GNU extension to record C++ vtable member usage */
269 HOWTO (R_VAX_GNU_VTENTRY, /* type */
270 0, /* rightshift */
271 2, /* size (0 = byte, 1 = short, 2 = long) */
272 0, /* bitsize */
273 FALSE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
277 "R_VAX_GNU_VTENTRY", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0, /* dst_mask */
281 FALSE), /* pcrel_offset */
282 };
283
284 static void
285 rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
286 Elf_Internal_Rela *dst)
287 {
288 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
289 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
290 }
291
292 #define elf_info_to_howto rtype_to_howto
293
294 static const struct
295 {
296 bfd_reloc_code_real_type bfd_val;
297 int elf_val;
298 } reloc_map[] = {
299 { BFD_RELOC_NONE, R_VAX_NONE },
300 { BFD_RELOC_32, R_VAX_32 },
301 { BFD_RELOC_16, R_VAX_16 },
302 { BFD_RELOC_8, R_VAX_8 },
303 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
304 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
305 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
306 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
307 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
308 { BFD_RELOC_NONE, R_VAX_COPY },
309 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
310 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
311 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
312 { BFD_RELOC_CTOR, R_VAX_32 },
313 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
314 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
315 };
316
317 static reloc_howto_type *
318 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
319 {
320 unsigned int i;
321 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
322 {
323 if (reloc_map[i].bfd_val == code)
324 return &howto_table[reloc_map[i].elf_val];
325 }
326 return 0;
327 }
328
329 static reloc_howto_type *
330 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
331 const char *r_name)
332 {
333 unsigned int i;
334
335 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
336 if (howto_table[i].name != NULL
337 && strcasecmp (howto_table[i].name, r_name) == 0)
338 return &howto_table[i];
339
340 return NULL;
341 }
342
343 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
344 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
345 #define ELF_ARCH bfd_arch_vax
346 /* end code generated by elf.el */
347 \f
348 /* Functions for the VAX ELF linker. */
349
350 /* The name of the dynamic interpreter. This is put in the .interp
351 section. */
352
353 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
354
355 /* The size in bytes of an entry in the procedure linkage table. */
356
357 #define PLT_ENTRY_SIZE 12
358
359 /* The first entry in a procedure linkage table looks like this. See
360 the SVR4 ABI VAX supplement to see how this works. */
361
362 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
363 {
364 0xdd, 0xef, /* pushl l^ */
365 0, 0, 0, 0, /* offset to .plt.got + 4 */
366 0x17, 0xff, /* jmp @L^(pc) */
367 0, 0, 0, 0, /* offset to .plt.got + 8 */
368 };
369
370 /* Subsequent entries in a procedure linkage table look like this. */
371
372 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
373 {
374 0xfc, 0x0f, /* .word ^M<r11:r2> */
375 0x16, 0xef, /* jsb L^(pc) */
376 0, 0, 0, 0, /* replaced with offset to start of .plt */
377 0, 0, 0, 0, /* index into .rela.plt */
378 };
379
380 /* The VAX linker needs to keep track of the number of relocs that it
381 decides to copy in check_relocs for each symbol. This is so that it
382 can discard PC relative relocs if it doesn't need them when linking
383 with -Bsymbolic. We store the information in a field extending the
384 regular ELF linker hash table. */
385
386 /* This structure keeps track of the number of PC relative relocs we have
387 copied for a given symbol. */
388
389 struct elf_vax_pcrel_relocs_copied
390 {
391 /* Next section. */
392 struct elf_vax_pcrel_relocs_copied *next;
393 /* A section in dynobj. */
394 asection *section;
395 /* Number of relocs copied in this section. */
396 bfd_size_type count;
397 };
398
399 /* VAX ELF linker hash entry. */
400
401 struct elf_vax_link_hash_entry
402 {
403 struct elf_link_hash_entry root;
404
405 /* Number of PC relative relocs copied for this symbol. */
406 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
407
408 bfd_vma got_addend;
409 };
410
411 /* Declare this now that the above structures are defined. */
412
413 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
414 void *);
415
416 /* Declare this now that the above structures are defined. */
417
418 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
419 void *);
420
421 /* Traverse an VAX ELF linker hash table. */
422
423 #define elf_vax_link_hash_traverse(table, func, info) \
424 (elf_link_hash_traverse \
425 ((table), \
426 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
427 (info)))
428
429 /* Create an entry in an VAX ELF linker hash table. */
430
431 static struct bfd_hash_entry *
432 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
433 struct bfd_hash_table *table,
434 const char *string)
435 {
436 struct elf_vax_link_hash_entry *ret =
437 (struct elf_vax_link_hash_entry *) entry;
438
439 /* Allocate the structure if it has not already been allocated by a
440 subclass. */
441 if (ret == NULL)
442 ret = ((struct elf_vax_link_hash_entry *)
443 bfd_hash_allocate (table,
444 sizeof (struct elf_vax_link_hash_entry)));
445 if (ret == NULL)
446 return (struct bfd_hash_entry *) ret;
447
448 /* Call the allocation method of the superclass. */
449 ret = ((struct elf_vax_link_hash_entry *)
450 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
451 table, string));
452 if (ret != NULL)
453 {
454 ret->pcrel_relocs_copied = NULL;
455 }
456
457 return (struct bfd_hash_entry *) ret;
458 }
459
460 /* Create an VAX ELF linker hash table. */
461
462 static struct bfd_link_hash_table *
463 elf_vax_link_hash_table_create (bfd *abfd)
464 {
465 struct elf_link_hash_table *ret;
466 bfd_size_type amt = sizeof (struct elf_link_hash_table);
467
468 ret = bfd_zmalloc (amt);
469 if (ret == NULL)
470 return NULL;
471
472 if (!_bfd_elf_link_hash_table_init (ret, abfd,
473 elf_vax_link_hash_newfunc,
474 sizeof (struct elf_vax_link_hash_entry),
475 GENERIC_ELF_DATA))
476 {
477 free (ret);
478 return NULL;
479 }
480
481 return &ret->root;
482 }
483
484 /* Keep vax-specific flags in the ELF header */
485 static bfd_boolean
486 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
487 {
488 elf_elfheader (abfd)->e_flags = flags;
489 elf_flags_init (abfd) = TRUE;
490 return TRUE;
491 }
492
493 /* Merge backend specific data from an object file to the output
494 object file when linking. */
495 static bfd_boolean
496 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
497 {
498 flagword in_flags;
499
500 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
501 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
502 return TRUE;
503
504 in_flags = elf_elfheader (ibfd)->e_flags;
505
506 if (!elf_flags_init (obfd))
507 {
508 elf_flags_init (obfd) = TRUE;
509 elf_elfheader (obfd)->e_flags = in_flags;
510 }
511
512 return TRUE;
513 }
514
515 /* Display the flags field */
516 static bfd_boolean
517 elf32_vax_print_private_bfd_data (bfd *abfd, void * ptr)
518 {
519 FILE *file = (FILE *) ptr;
520
521 BFD_ASSERT (abfd != NULL && ptr != NULL);
522
523 /* Print normal ELF private data. */
524 _bfd_elf_print_private_bfd_data (abfd, ptr);
525
526 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
527
528 /* xgettext:c-format */
529 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
530
531 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
532 fprintf (file, _(" [nonpic]"));
533
534 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
535 fprintf (file, _(" [d-float]"));
536
537 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
538 fprintf (file, _(" [g-float]"));
539
540 fputc ('\n', file);
541
542 return TRUE;
543 }
544 /* Look through the relocs for a section during the first phase, and
545 allocate space in the global offset table or procedure linkage
546 table. */
547
548 static bfd_boolean
549 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
550 const Elf_Internal_Rela *relocs)
551 {
552 bfd *dynobj;
553 Elf_Internal_Shdr *symtab_hdr;
554 struct elf_link_hash_entry **sym_hashes;
555 const Elf_Internal_Rela *rel;
556 const Elf_Internal_Rela *rel_end;
557 asection *sgot;
558 asection *srelgot;
559 asection *sreloc;
560
561 if (info->relocatable)
562 return TRUE;
563
564 dynobj = elf_hash_table (info)->dynobj;
565 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
566 sym_hashes = elf_sym_hashes (abfd);
567
568 sgot = NULL;
569 srelgot = NULL;
570 sreloc = NULL;
571
572 rel_end = relocs + sec->reloc_count;
573 for (rel = relocs; rel < rel_end; rel++)
574 {
575 unsigned long r_symndx;
576 struct elf_link_hash_entry *h;
577
578 r_symndx = ELF32_R_SYM (rel->r_info);
579
580 if (r_symndx < symtab_hdr->sh_info)
581 h = NULL;
582 else
583 {
584 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
585 while (h->root.type == bfd_link_hash_indirect
586 || h->root.type == bfd_link_hash_warning)
587 h = (struct elf_link_hash_entry *) h->root.u.i.link;
588
589 /* PR15323, ref flags aren't set for references in the same
590 object. */
591 h->root.non_ir_ref = 1;
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 (sgot == NULL)
617 {
618 sgot = bfd_get_linker_section (dynobj, ".got");
619 BFD_ASSERT (sgot != NULL);
620 }
621
622 if (srelgot == NULL
623 && (h != NULL || info->shared))
624 {
625 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
626 if (srelgot == NULL)
627 {
628 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
629 | SEC_IN_MEMORY | SEC_LINKER_CREATED
630 | SEC_READONLY);
631
632 srelgot = bfd_make_section_anyway_with_flags (dynobj,
633 ".rela.got",
634 flags);
635 if (srelgot == NULL
636 || !bfd_set_section_alignment (dynobj, srelgot, 2))
637 return FALSE;
638 }
639 }
640
641 if (h != NULL)
642 {
643 struct elf_vax_link_hash_entry *eh;
644
645 eh = (struct elf_vax_link_hash_entry *) h;
646 if (h->got.refcount == -1)
647 {
648 h->got.refcount = 1;
649 eh->got_addend = rel->r_addend;
650 }
651 else
652 {
653 h->got.refcount++;
654 if (eh->got_addend != (bfd_vma) rel->r_addend)
655 (*_bfd_error_handler)
656 (_("%s: warning: GOT addend of %ld to `%s' does"
657 " not match previous GOT addend of %ld"),
658 bfd_get_filename (abfd), rel->r_addend,
659 h->root.root.string,
660 eh->got_addend);
661
662 }
663 }
664 break;
665
666 case R_VAX_PLT32:
667 /* This symbol requires a procedure linkage table entry. We
668 actually build the entry in adjust_dynamic_symbol,
669 because this might be a case of linking PIC code which is
670 never referenced by a dynamic object, in which case we
671 don't need to generate a procedure linkage table entry
672 after all. */
673 BFD_ASSERT (h != NULL);
674
675 /* If this is a local symbol, we resolve it directly without
676 creating a procedure linkage table entry. */
677 if (h->forced_local)
678 break;
679
680 h->needs_plt = 1;
681 if (h->plt.refcount == -1)
682 h->plt.refcount = 1;
683 else
684 h->plt.refcount++;
685 break;
686
687 case R_VAX_PC8:
688 case R_VAX_PC16:
689 case R_VAX_PC32:
690 /* If we are creating a shared library and this is not a local
691 symbol, we need to copy the reloc into the shared library.
692 However when linking with -Bsymbolic and this is a global
693 symbol which is defined in an object we are including in the
694 link (i.e., DEF_REGULAR is set), then we can resolve the
695 reloc directly. At this point we have not seen all the input
696 files, so it is possible that DEF_REGULAR is not set now but
697 will be set later (it is never cleared). We account for that
698 possibility below by storing information in the
699 pcrel_relocs_copied field of the hash table entry. */
700 if (!(info->shared
701 && (sec->flags & SEC_ALLOC) != 0
702 && h != NULL
703 && (!info->symbolic
704 || !h->def_regular)))
705 {
706 if (h != NULL
707 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
708 && !h->forced_local)
709 {
710 /* Make sure a plt entry is created for this symbol if
711 it turns out to be a function defined by a dynamic
712 object. */
713 if (h->plt.refcount == -1)
714 h->plt.refcount = 1;
715 else
716 h->plt.refcount++;
717 }
718 break;
719 }
720 /* If this is a local symbol, we can resolve it directly. */
721 if (h != NULL
722 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
723 || h->forced_local))
724 break;
725
726 /* Fall through. */
727 case R_VAX_8:
728 case R_VAX_16:
729 case R_VAX_32:
730 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
731 {
732 /* Make sure a plt entry is created for this symbol if it
733 turns out to be a function defined by a dynamic object. */
734 if (h->plt.refcount == -1)
735 h->plt.refcount = 1;
736 else
737 h->plt.refcount++;
738 }
739
740 /* If we are creating a shared library, we need to copy the
741 reloc into the shared library. */
742 if (info->shared
743 && (sec->flags & SEC_ALLOC) != 0)
744 {
745 /* When creating a shared object, we must copy these
746 reloc types into the output file. We create a reloc
747 section in dynobj and make room for this reloc. */
748 if (sreloc == NULL)
749 {
750 sreloc = _bfd_elf_make_dynamic_reloc_section
751 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
752
753 if (sreloc == NULL)
754 return FALSE;
755
756 if (sec->flags & SEC_READONLY)
757 info->flags |= DF_TEXTREL;
758 }
759
760 sreloc->size += sizeof (Elf32_External_Rela);
761
762 /* If we are linking with -Bsymbolic, we count the number of
763 PC relative relocations we have entered for this symbol,
764 so that we can discard them again if the symbol is later
765 defined by a regular object. Note that this function is
766 only called if we are using a vaxelf linker hash table,
767 which means that h is really a pointer to an
768 elf_vax_link_hash_entry. */
769 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
770 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
771 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
772 && info->symbolic)
773 {
774 struct elf_vax_link_hash_entry *eh;
775 struct elf_vax_pcrel_relocs_copied *p;
776
777 eh = (struct elf_vax_link_hash_entry *) h;
778
779 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
780 if (p->section == sreloc)
781 break;
782
783 if (p == NULL)
784 {
785 p = ((struct elf_vax_pcrel_relocs_copied *)
786 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
787 if (p == NULL)
788 return FALSE;
789 p->next = eh->pcrel_relocs_copied;
790 eh->pcrel_relocs_copied = p;
791 p->section = sreloc;
792 p->count = 0;
793 }
794
795 ++p->count;
796 }
797 }
798
799 break;
800
801 /* This relocation describes the C++ object vtable hierarchy.
802 Reconstruct it for later use during GC. */
803 case R_VAX_GNU_VTINHERIT:
804 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
805 return FALSE;
806 break;
807
808 /* This relocation describes which C++ vtable entries are actually
809 used. Record for later use during GC. */
810 case R_VAX_GNU_VTENTRY:
811 BFD_ASSERT (h != NULL);
812 if (h != NULL
813 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
814 return FALSE;
815 break;
816
817 default:
818 break;
819 }
820 }
821
822 return TRUE;
823 }
824
825 /* Return the section that should be marked against GC for a given
826 relocation. */
827
828 static asection *
829 elf_vax_gc_mark_hook (asection *sec,
830 struct bfd_link_info *info,
831 Elf_Internal_Rela *rel,
832 struct elf_link_hash_entry *h,
833 Elf_Internal_Sym *sym)
834 {
835 if (h != NULL)
836 switch (ELF32_R_TYPE (rel->r_info))
837 {
838 case R_VAX_GNU_VTINHERIT:
839 case R_VAX_GNU_VTENTRY:
840 return NULL;
841 }
842
843 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
844 }
845
846 /* Update the got entry reference counts for the section being removed. */
847
848 static bfd_boolean
849 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
850 const Elf_Internal_Rela *relocs)
851 {
852 Elf_Internal_Shdr *symtab_hdr;
853 struct elf_link_hash_entry **sym_hashes;
854 const Elf_Internal_Rela *rel, *relend;
855 bfd *dynobj;
856
857 if (info->relocatable)
858 return TRUE;
859
860 dynobj = elf_hash_table (info)->dynobj;
861 if (dynobj == NULL)
862 return TRUE;
863
864 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
865 sym_hashes = elf_sym_hashes (abfd);
866
867 relend = relocs + sec->reloc_count;
868 for (rel = relocs; rel < relend; rel++)
869 {
870 unsigned long r_symndx;
871 struct elf_link_hash_entry *h = NULL;
872
873 r_symndx = ELF32_R_SYM (rel->r_info);
874 if (r_symndx >= symtab_hdr->sh_info)
875 {
876 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
877 while (h->root.type == bfd_link_hash_indirect
878 || h->root.type == bfd_link_hash_warning)
879 h = (struct elf_link_hash_entry *) h->root.u.i.link;
880 }
881
882 switch (ELF32_R_TYPE (rel->r_info))
883 {
884 case R_VAX_GOT32:
885 if (h != NULL && h->got.refcount > 0)
886 --h->got.refcount;
887 break;
888
889 case R_VAX_PLT32:
890 case R_VAX_PC8:
891 case R_VAX_PC16:
892 case R_VAX_PC32:
893 case R_VAX_8:
894 case R_VAX_16:
895 case R_VAX_32:
896 if (h != NULL && h->plt.refcount > 0)
897 --h->plt.refcount;
898 break;
899
900 default:
901 break;
902 }
903 }
904
905 return TRUE;
906 }
907
908 /* Adjust a symbol defined by a dynamic object and referenced by a
909 regular object. The current definition is in some section of the
910 dynamic object, but we're not including those sections. We have to
911 change the definition to something the rest of the link can
912 understand. */
913
914 static bfd_boolean
915 elf_vax_adjust_dynamic_symbol (struct bfd_link_info *info,
916 struct elf_link_hash_entry *h)
917 {
918 bfd *dynobj;
919 asection *s;
920
921 dynobj = elf_hash_table (info)->dynobj;
922
923 /* Make sure we know what is going on here. */
924 BFD_ASSERT (dynobj != NULL
925 && (h->needs_plt
926 || h->u.weakdef != NULL
927 || (h->def_dynamic
928 && h->ref_regular
929 && !h->def_regular)));
930
931 /* If this is a function, put it in the procedure linkage table. We
932 will fill in the contents of the procedure linkage table later,
933 when we know the address of the .got section. */
934 if (h->type == STT_FUNC
935 || h->needs_plt)
936 {
937 if (h->plt.refcount <= 0
938 || SYMBOL_CALLS_LOCAL (info, h)
939 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
940 && h->root.type == bfd_link_hash_undefweak))
941 {
942 /* This case can occur if we saw a PLTxx reloc in an input
943 file, but the symbol was never referred to by a dynamic
944 object, or if all references were garbage collected. In
945 such a case, we don't actually need to build a procedure
946 linkage table, and we can just do a PCxx reloc instead. */
947 h->plt.offset = (bfd_vma) -1;
948 h->needs_plt = 0;
949 return TRUE;
950 }
951
952 s = bfd_get_linker_section (dynobj, ".plt");
953 BFD_ASSERT (s != NULL);
954
955 /* If this is the first .plt entry, make room for the special
956 first entry. */
957 if (s->size == 0)
958 {
959 s->size += PLT_ENTRY_SIZE;
960 }
961
962 /* If this symbol is not defined in a regular file, and we are
963 not generating a shared library, then set the symbol to this
964 location in the .plt. This is required to make function
965 pointers compare as equal between the normal executable and
966 the shared library. */
967 if (!info->shared
968 && !h->def_regular)
969 {
970 h->root.u.def.section = s;
971 h->root.u.def.value = s->size;
972 }
973
974 h->plt.offset = s->size;
975
976 /* Make room for this entry. */
977 s->size += PLT_ENTRY_SIZE;
978
979 /* We also need to make an entry in the .got.plt section, which
980 will be placed in the .got section by the linker script. */
981
982 s = bfd_get_linker_section (dynobj, ".got.plt");
983 BFD_ASSERT (s != NULL);
984 s->size += 4;
985
986 /* We also need to make an entry in the .rela.plt section. */
987
988 s = bfd_get_linker_section (dynobj, ".rela.plt");
989 BFD_ASSERT (s != NULL);
990 s->size += sizeof (Elf32_External_Rela);
991
992 return TRUE;
993 }
994
995 /* Reinitialize the plt offset now that it is not used as a reference
996 count any more. */
997 h->plt.offset = (bfd_vma) -1;
998
999 /* If this is a weak symbol, and there is a real definition, the
1000 processor independent code will have arranged for us to see the
1001 real definition first, and we can just use the same value. */
1002 if (h->u.weakdef != NULL)
1003 {
1004 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1005 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1006 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1007 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1008 return TRUE;
1009 }
1010
1011 /* This is a reference to a symbol defined by a dynamic object which
1012 is not a function. */
1013
1014 /* If we are creating a shared library, we must presume that the
1015 only references to the symbol are via the global offset table.
1016 For such cases we need not do anything here; the relocations will
1017 be handled correctly by relocate_section. */
1018 if (info->shared)
1019 return TRUE;
1020
1021 /* We must allocate the symbol in our .dynbss section, which will
1022 become part of the .bss section of the executable. There will be
1023 an entry for this symbol in the .dynsym section. The dynamic
1024 object will contain position independent code, so all references
1025 from the dynamic object to this symbol will go through the global
1026 offset table. The dynamic linker will use the .dynsym entry to
1027 determine the address it must put in the global offset table, so
1028 both the dynamic object and the regular object will refer to the
1029 same memory location for the variable. */
1030
1031 s = bfd_get_linker_section (dynobj, ".dynbss");
1032 BFD_ASSERT (s != NULL);
1033
1034 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1035 copy the initial value out of the dynamic object and into the
1036 runtime process image. We need to remember the offset into the
1037 .rela.bss section we are going to use. */
1038 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1039 {
1040 asection *srel;
1041
1042 srel = bfd_get_linker_section (dynobj, ".rela.bss");
1043 BFD_ASSERT (srel != NULL);
1044 srel->size += sizeof (Elf32_External_Rela);
1045 h->needs_copy = 1;
1046 }
1047
1048 return _bfd_elf_adjust_dynamic_copy (h, s);
1049 }
1050
1051 /* This function is called via elf_link_hash_traverse. It resets GOT
1052 and PLT (.GOT) reference counts back to -1 so normal PC32 relocation
1053 will be done. */
1054
1055 static bfd_boolean
1056 elf_vax_discard_got_entries (struct elf_link_hash_entry *h,
1057 void *infoptr ATTRIBUTE_UNUSED)
1058 {
1059 h->got.refcount = -1;
1060 h->plt.refcount = -1;
1061
1062 return TRUE;
1063 }
1064
1065 /* Discard unused dynamic data if this is a static link. */
1066
1067 static bfd_boolean
1068 elf_vax_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1069 struct bfd_link_info *info)
1070 {
1071 bfd *dynobj;
1072 asection *s;
1073
1074 dynobj = elf_hash_table (info)->dynobj;
1075
1076 if (dynobj && !elf_hash_table (info)->dynamic_sections_created)
1077 {
1078 /* We may have created entries in the .rela.got and .got sections.
1079 However, if we are not creating the dynamic sections, we will
1080 not actually use these entries. Reset the size of .rela.got
1081 and .got, which will cause them to get stripped from the output
1082 file below. */
1083 s = bfd_get_linker_section (dynobj, ".rela.got");
1084 if (s != NULL)
1085 s->size = 0;
1086 s = bfd_get_linker_section (dynobj, ".got.plt");
1087 if (s != NULL)
1088 s->size = 0;
1089 s = bfd_get_linker_section (dynobj, ".got");
1090 if (s != NULL)
1091 s->size = 0;
1092 }
1093
1094 /* If this is a static link, we need to discard all the got entries we've
1095 recorded. */
1096 if (!dynobj || !elf_hash_table (info)->dynamic_sections_created)
1097 elf_link_hash_traverse (elf_hash_table (info),
1098 elf_vax_discard_got_entries,
1099 info);
1100
1101 return TRUE;
1102 }
1103
1104 /* Set the sizes of the dynamic sections. */
1105
1106 static bfd_boolean
1107 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1108 {
1109 bfd *dynobj;
1110 asection *s;
1111 bfd_boolean plt;
1112 bfd_boolean relocs;
1113 bfd_boolean reltext;
1114
1115 dynobj = elf_hash_table (info)->dynobj;
1116 BFD_ASSERT (dynobj != NULL);
1117
1118 if (elf_hash_table (info)->dynamic_sections_created)
1119 {
1120 /* Set the contents of the .interp section to the interpreter. */
1121 if (info->executable)
1122 {
1123 s = bfd_get_linker_section (dynobj, ".interp");
1124 BFD_ASSERT (s != NULL);
1125 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1126 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1127 }
1128 }
1129
1130 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1131 relative relocs against symbols defined in a regular object. We
1132 allocated space for them in the check_relocs routine, but we will not
1133 fill them in in the relocate_section routine. */
1134 if (info->shared && info->symbolic)
1135 elf_vax_link_hash_traverse (elf_hash_table (info),
1136 elf_vax_discard_copies,
1137 NULL);
1138
1139 /* If this is a -Bsymbolic shared link, we need to discard all the got
1140 entries we've recorded. Otherwise, we need to instantiate (allocate
1141 space for them). */
1142 elf_link_hash_traverse (elf_hash_table (info),
1143 elf_vax_instantiate_got_entries,
1144 info);
1145
1146 /* The check_relocs and adjust_dynamic_symbol entry points have
1147 determined the sizes of the various dynamic sections. Allocate
1148 memory for them. */
1149 plt = FALSE;
1150 relocs = FALSE;
1151 reltext = FALSE;
1152 for (s = dynobj->sections; s != NULL; s = s->next)
1153 {
1154 const char *name;
1155
1156 if ((s->flags & SEC_LINKER_CREATED) == 0)
1157 continue;
1158
1159 /* It's OK to base decisions on the section name, because none
1160 of the dynobj section names depend upon the input files. */
1161 name = bfd_get_section_name (dynobj, s);
1162
1163 if (strcmp (name, ".plt") == 0)
1164 {
1165 /* Remember whether there is a PLT. */
1166 plt = s->size != 0;
1167 }
1168 else if (CONST_STRNEQ (name, ".rela"))
1169 {
1170 if (s->size != 0)
1171 {
1172 asection *target;
1173
1174 /* Remember whether there are any reloc sections other
1175 than .rela.plt. */
1176 if (strcmp (name, ".rela.plt") != 0)
1177 {
1178 const char *outname;
1179
1180 relocs = TRUE;
1181
1182 /* If this relocation section applies to a read only
1183 section, then we probably need a DT_TEXTREL
1184 entry. .rela.plt is actually associated with
1185 .got.plt, which is never readonly. */
1186 outname = bfd_get_section_name (output_bfd,
1187 s->output_section);
1188 target = bfd_get_section_by_name (output_bfd, outname + 5);
1189 if (target != NULL
1190 && (target->flags & SEC_READONLY) != 0
1191 && (target->flags & SEC_ALLOC) != 0)
1192 reltext = TRUE;
1193 }
1194
1195 /* We use the reloc_count field as a counter if we need
1196 to copy relocs into the output file. */
1197 s->reloc_count = 0;
1198 }
1199 }
1200 else if (! CONST_STRNEQ (name, ".got")
1201 && strcmp (name, ".dynbss") != 0)
1202 {
1203 /* It's not one of our sections, so don't allocate space. */
1204 continue;
1205 }
1206
1207 if (s->size == 0)
1208 {
1209 /* If we don't need this section, strip it from the
1210 output file. This is mostly to handle .rela.bss and
1211 .rela.plt. We must create both sections in
1212 create_dynamic_sections, because they must be created
1213 before the linker maps input sections to output
1214 sections. The linker does that before
1215 adjust_dynamic_symbol is called, and it is that
1216 function which decides whether anything needs to go
1217 into these sections. */
1218 s->flags |= SEC_EXCLUDE;
1219 continue;
1220 }
1221
1222 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1223 continue;
1224
1225 /* Allocate memory for the section contents. */
1226 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1227 if (s->contents == NULL)
1228 return FALSE;
1229 }
1230
1231 if (elf_hash_table (info)->dynamic_sections_created)
1232 {
1233 /* Add some entries to the .dynamic section. We fill in the
1234 values later, in elf_vax_finish_dynamic_sections, but we
1235 must add the entries now so that we get the correct size for
1236 the .dynamic section. The DT_DEBUG entry is filled in by the
1237 dynamic linker and used by the debugger. */
1238 #define add_dynamic_entry(TAG, VAL) \
1239 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1240
1241 if (!info->shared)
1242 {
1243 if (!add_dynamic_entry (DT_DEBUG, 0))
1244 return FALSE;
1245 }
1246
1247 if (plt)
1248 {
1249 if (!add_dynamic_entry (DT_PLTGOT, 0)
1250 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1251 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1252 || !add_dynamic_entry (DT_JMPREL, 0))
1253 return FALSE;
1254 }
1255
1256 if (relocs)
1257 {
1258 if (!add_dynamic_entry (DT_RELA, 0)
1259 || !add_dynamic_entry (DT_RELASZ, 0)
1260 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1261 return FALSE;
1262 }
1263
1264 if (reltext || (info->flags & DF_TEXTREL) != 0)
1265 {
1266 if (!add_dynamic_entry (DT_TEXTREL, 0))
1267 return FALSE;
1268 }
1269 }
1270 #undef add_dynamic_entry
1271
1272 return TRUE;
1273 }
1274
1275 /* This function is called via elf_vax_link_hash_traverse if we are
1276 creating a shared object with -Bsymbolic. It discards the space
1277 allocated to copy PC relative relocs against symbols which are defined
1278 in regular objects. We allocated space for them in the check_relocs
1279 routine, but we won't fill them in in the relocate_section routine. */
1280
1281 static bfd_boolean
1282 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1283 void * ignore ATTRIBUTE_UNUSED)
1284 {
1285 struct elf_vax_pcrel_relocs_copied *s;
1286
1287 /* We only discard relocs for symbols defined in a regular object. */
1288 if (!h->root.def_regular)
1289 return TRUE;
1290
1291 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1292 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1293
1294 return TRUE;
1295 }
1296
1297 /* This function is called via elf_link_hash_traverse. It looks for
1298 entries that have GOT or PLT (.GOT) references. If creating a shared
1299 object with -Bsymbolic, or the symbol has been forced local, then it
1300 resets the reference count back to -1 so normal PC32 relocation will
1301 be done. Otherwise space in the .got and .rela.got will be reserved
1302 for the symbol. */
1303
1304 static bfd_boolean
1305 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr)
1306 {
1307 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1308 bfd *dynobj;
1309 asection *sgot;
1310 asection *srelgot;
1311
1312 /* We don't care about non-GOT (and non-PLT) entries. */
1313 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1314 return TRUE;
1315
1316 dynobj = elf_hash_table (info)->dynobj;
1317 BFD_ASSERT (dynobj != NULL);
1318
1319 sgot = bfd_get_linker_section (dynobj, ".got");
1320 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1321
1322 if (SYMBOL_REFERENCES_LOCAL (info, h))
1323 {
1324 h->got.refcount = -1;
1325 h->plt.refcount = -1;
1326 }
1327 else if (h->got.refcount > 0)
1328 {
1329 /* Make sure this symbol is output as a dynamic symbol. */
1330 if (h->dynindx == -1)
1331 {
1332 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1333 return FALSE;
1334 }
1335
1336 /* Allocate space in the .got and .rela.got sections. */
1337 sgot->size += 4;
1338 srelgot->size += sizeof (Elf32_External_Rela);
1339 }
1340
1341 return TRUE;
1342 }
1343
1344 /* Relocate an VAX ELF section. */
1345
1346 static bfd_boolean
1347 elf_vax_relocate_section (bfd *output_bfd,
1348 struct bfd_link_info *info,
1349 bfd *input_bfd,
1350 asection *input_section,
1351 bfd_byte *contents,
1352 Elf_Internal_Rela *relocs,
1353 Elf_Internal_Sym *local_syms,
1354 asection **local_sections)
1355 {
1356 bfd *dynobj;
1357 Elf_Internal_Shdr *symtab_hdr;
1358 struct elf_link_hash_entry **sym_hashes;
1359 bfd_vma plt_index;
1360 bfd_vma got_offset;
1361 asection *sgot;
1362 asection *splt;
1363 asection *sgotplt;
1364 asection *sreloc;
1365 Elf_Internal_Rela *rel;
1366 Elf_Internal_Rela *relend;
1367
1368 dynobj = elf_hash_table (info)->dynobj;
1369 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1370 sym_hashes = elf_sym_hashes (input_bfd);
1371
1372 sgot = NULL;
1373 splt = NULL;
1374 sgotplt = NULL;
1375 sreloc = NULL;
1376
1377 rel = relocs;
1378 relend = relocs + input_section->reloc_count;
1379 for (; rel < relend; rel++)
1380 {
1381 int r_type;
1382 reloc_howto_type *howto;
1383 unsigned long r_symndx;
1384 struct elf_link_hash_entry *h;
1385 Elf_Internal_Sym *sym;
1386 asection *sec;
1387 bfd_vma relocation;
1388 bfd_reloc_status_type r;
1389
1390 r_type = ELF32_R_TYPE (rel->r_info);
1391 if (r_type < 0 || r_type >= (int) R_VAX_max)
1392 {
1393 bfd_set_error (bfd_error_bad_value);
1394 return FALSE;
1395 }
1396 howto = howto_table + r_type;
1397
1398 r_symndx = ELF32_R_SYM (rel->r_info);
1399 h = NULL;
1400 sym = NULL;
1401 sec = NULL;
1402 if (r_symndx < symtab_hdr->sh_info)
1403 {
1404 sym = local_syms + r_symndx;
1405 sec = local_sections[r_symndx];
1406 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1407 }
1408 else
1409 {
1410 bfd_boolean unresolved_reloc;
1411 bfd_boolean warned, ignored;
1412
1413 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1414 r_symndx, symtab_hdr, sym_hashes,
1415 h, sec, relocation,
1416 unresolved_reloc, warned, ignored);
1417
1418 if ((h->root.type == bfd_link_hash_defined
1419 || h->root.type == bfd_link_hash_defweak)
1420 && ((r_type == R_VAX_PLT32
1421 && h->plt.offset != (bfd_vma) -1
1422 && !h->forced_local
1423 && elf_hash_table (info)->dynamic_sections_created)
1424 || (r_type == R_VAX_GOT32
1425 && h->got.offset != (bfd_vma) -1
1426 && !h->forced_local
1427 && elf_hash_table (info)->dynamic_sections_created
1428 && (! info->shared
1429 || (! info->symbolic && h->dynindx != -1)
1430 || !h->def_regular))
1431 || (info->shared
1432 && ((! info->symbolic && h->dynindx != -1)
1433 || !h->def_regular)
1434 && ((input_section->flags & SEC_ALLOC) != 0
1435 /* DWARF will emit R_VAX_32 relocations in its
1436 sections against symbols defined externally
1437 in shared libraries. We can't do anything
1438 with them here. */
1439
1440 || ((input_section->flags & SEC_DEBUGGING) != 0
1441 && h->def_dynamic))
1442 && (r_type == R_VAX_8
1443 || r_type == R_VAX_16
1444 || r_type == R_VAX_32))))
1445 /* In these cases, we don't need the relocation
1446 value. We check specially because in some
1447 obscure cases sec->output_section will be NULL. */
1448 relocation = 0;
1449 }
1450
1451 if (sec != NULL && discarded_section (sec))
1452 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1453 rel, 1, relend, howto, 0, contents);
1454
1455 if (info->relocatable)
1456 continue;
1457
1458 switch (r_type)
1459 {
1460 case R_VAX_GOT32:
1461 /* Relocation is to the address of the entry for this symbol
1462 in the global offset table. */
1463
1464 /* Resolve a GOTxx reloc against a local symbol directly,
1465 without using the global offset table. */
1466 if (h == NULL
1467 || h->got.offset == (bfd_vma) -1)
1468 break;
1469
1470 {
1471 bfd_vma off;
1472
1473 if (sgot == NULL)
1474 {
1475 sgot = bfd_get_linker_section (dynobj, ".got");
1476 BFD_ASSERT (sgot != NULL);
1477 }
1478
1479 off = h->got.offset;
1480 BFD_ASSERT (off < sgot->size);
1481
1482 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1483
1484 relocation = sgot->output_offset + off;
1485 /* The GOT relocation uses the addend. */
1486 rel->r_addend = 0;
1487
1488 /* Change the reference to be indirect. */
1489 contents[rel->r_offset - 1] |= 0x10;
1490 relocation += sgot->output_section->vma;
1491 }
1492 break;
1493
1494 case R_VAX_PC32:
1495 /* If we are creating an executable and the function this
1496 reloc refers to is in a shared lib, then we made a PLT
1497 entry for this symbol and need to handle the reloc like
1498 a PLT reloc. */
1499 if (info->shared)
1500 goto r_vax_pc32_shared;
1501 /* Fall through. */
1502 case R_VAX_PLT32:
1503 /* Relocation is to the entry for this symbol in the
1504 procedure linkage table. */
1505
1506 /* Resolve a PLTxx reloc against a local symbol directly,
1507 without using the procedure linkage table. */
1508 if (h == NULL
1509 || h->plt.offset == (bfd_vma) -1)
1510 break;
1511
1512 if (splt == NULL)
1513 {
1514 splt = bfd_get_linker_section (dynobj, ".plt");
1515 BFD_ASSERT (splt != NULL);
1516 }
1517
1518 if (sgotplt == NULL)
1519 {
1520 sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1521 BFD_ASSERT (sgotplt != NULL);
1522 }
1523
1524 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1525
1526 /* Get the offset into the .got table of the entry that
1527 corresponds to this function. Each .got entry is 4 bytes.
1528 The first two are reserved. */
1529 got_offset = (plt_index + 3) * 4;
1530
1531 /* We want the relocation to point into the .got.plt instead
1532 of the plt itself. */
1533 relocation = (sgotplt->output_section->vma
1534 + sgotplt->output_offset
1535 + got_offset);
1536 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1537 if (rel->r_addend == 2)
1538 {
1539 h->plt.offset |= 1;
1540 }
1541 else if (rel->r_addend != 0)
1542 (*_bfd_error_handler)
1543 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1544 bfd_get_filename (input_bfd), rel->r_addend,
1545 h->root.root.string,
1546 bfd_get_section_name (input_bfd, input_section));
1547 rel->r_addend = 0;
1548
1549 break;
1550
1551 case R_VAX_PC8:
1552 case R_VAX_PC16:
1553 r_vax_pc32_shared:
1554 if (h == NULL
1555 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1556 || h->forced_local)
1557 break;
1558 /* Fall through. */
1559 case R_VAX_8:
1560 case R_VAX_16:
1561 case R_VAX_32:
1562 if (info->shared
1563 && r_symndx != STN_UNDEF
1564 && (input_section->flags & SEC_ALLOC) != 0
1565 && ((r_type != R_VAX_PC8
1566 && r_type != R_VAX_PC16
1567 && r_type != R_VAX_PC32)
1568 || ((input_section->flags & SEC_CODE)
1569 && (!info->symbolic
1570 || (!h->def_regular && h->type != STT_SECTION)))))
1571 {
1572 Elf_Internal_Rela outrel;
1573 bfd_byte *loc;
1574 bfd_boolean skip, relocate;
1575
1576 /* When generating a shared object, these relocations
1577 are copied into the output file to be resolved at run
1578 time. */
1579 if (sreloc == NULL)
1580 {
1581 sreloc = _bfd_elf_get_dynamic_reloc_section
1582 (input_bfd, input_section, /*rela?*/ TRUE);
1583 if (sreloc == NULL)
1584 return FALSE;
1585 }
1586
1587 skip = FALSE;
1588 relocate = FALSE;
1589
1590 outrel.r_offset =
1591 _bfd_elf_section_offset (output_bfd, info, input_section,
1592 rel->r_offset);
1593 if (outrel.r_offset == (bfd_vma) -1)
1594 skip = TRUE;
1595 if (outrel.r_offset == (bfd_vma) -2)
1596 skip = TRUE, relocate = TRUE;
1597 outrel.r_offset += (input_section->output_section->vma
1598 + input_section->output_offset);
1599
1600 if (skip)
1601 memset (&outrel, 0, sizeof outrel);
1602 /* h->dynindx may be -1 if the symbol was marked to
1603 become local. */
1604 else if (h != NULL
1605 && ((! info->symbolic && h->dynindx != -1)
1606 || !h->def_regular))
1607 {
1608 BFD_ASSERT (h->dynindx != -1);
1609 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1610 outrel.r_addend = relocation + rel->r_addend;
1611 }
1612 else
1613 {
1614 if (r_type == R_VAX_32)
1615 {
1616 relocate = TRUE;
1617 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1618 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1619 &contents[rel->r_offset]) == 0);
1620 outrel.r_addend = relocation + rel->r_addend;
1621 }
1622 else
1623 {
1624 long indx;
1625
1626 if (bfd_is_abs_section (sec))
1627 indx = 0;
1628 else if (sec == NULL || sec->owner == NULL)
1629 {
1630 bfd_set_error (bfd_error_bad_value);
1631 return FALSE;
1632 }
1633 else
1634 {
1635 asection *osec;
1636
1637 /* We are turning this relocation into one
1638 against a section symbol. It would be
1639 proper to subtract the symbol's value,
1640 osec->vma, from the emitted reloc addend,
1641 but ld.so expects buggy relocs. */
1642 osec = sec->output_section;
1643 indx = elf_section_data (osec)->dynindx;
1644 if (indx == 0)
1645 {
1646 struct elf_link_hash_table *htab;
1647 htab = elf_hash_table (info);
1648 osec = htab->text_index_section;
1649 indx = elf_section_data (osec)->dynindx;
1650 }
1651 BFD_ASSERT (indx != 0);
1652 }
1653
1654 outrel.r_info = ELF32_R_INFO (indx, r_type);
1655 outrel.r_addend = relocation + rel->r_addend;
1656 }
1657 }
1658
1659 if ((input_section->flags & SEC_CODE) != 0
1660 || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32
1661 && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE
1662 && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY
1663 && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT
1664 && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT))
1665 {
1666 if (h != NULL)
1667 (*_bfd_error_handler)
1668 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1669 bfd_get_filename (input_bfd), howto->name,
1670 h->root.root.string,
1671 bfd_get_section_name (input_bfd, input_section));
1672 else
1673 (*_bfd_error_handler)
1674 (_("%s: warning: %s relocation to 0x%x from %s section"),
1675 bfd_get_filename (input_bfd), howto->name,
1676 outrel.r_addend,
1677 bfd_get_section_name (input_bfd, input_section));
1678 }
1679 loc = sreloc->contents;
1680 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1681 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1682
1683 /* This reloc will be computed at runtime, so there's no
1684 need to do anything now, except for R_VAX_32
1685 relocations that have been turned into
1686 R_VAX_RELATIVE. */
1687 if (!relocate)
1688 continue;
1689 }
1690
1691 break;
1692
1693 case R_VAX_GNU_VTINHERIT:
1694 case R_VAX_GNU_VTENTRY:
1695 /* These are no-ops in the end. */
1696 continue;
1697
1698 default:
1699 break;
1700 }
1701
1702 /* VAX PCREL relocations are from the end of relocation, not the start.
1703 So subtract the difference from the relocation amount since we can't
1704 add it to the offset. */
1705 if (howto->pc_relative && howto->pcrel_offset)
1706 relocation -= bfd_get_reloc_size(howto);
1707
1708 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1709 contents, rel->r_offset,
1710 relocation, rel->r_addend);
1711
1712 if (r != bfd_reloc_ok)
1713 {
1714 switch (r)
1715 {
1716 default:
1717 case bfd_reloc_outofrange:
1718 abort ();
1719 case bfd_reloc_overflow:
1720 {
1721 const char *name;
1722
1723 if (h != NULL)
1724 name = NULL;
1725 else
1726 {
1727 name = bfd_elf_string_from_elf_section (input_bfd,
1728 symtab_hdr->sh_link,
1729 sym->st_name);
1730 if (name == NULL)
1731 return FALSE;
1732 if (*name == '\0')
1733 name = bfd_section_name (input_bfd, sec);
1734 }
1735 if (!(info->callbacks->reloc_overflow
1736 (info, (h ? &h->root : NULL), name, howto->name,
1737 (bfd_vma) 0, input_bfd, input_section,
1738 rel->r_offset)))
1739 return FALSE;
1740 }
1741 break;
1742 }
1743 }
1744 }
1745
1746 return TRUE;
1747 }
1748
1749 /* Finish up dynamic symbol handling. We set the contents of various
1750 dynamic sections here. */
1751
1752 static bfd_boolean
1753 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1754 struct elf_link_hash_entry *h,
1755 Elf_Internal_Sym *sym)
1756 {
1757 bfd *dynobj;
1758
1759 dynobj = elf_hash_table (info)->dynobj;
1760
1761 if (h->plt.offset != (bfd_vma) -1)
1762 {
1763 asection *splt;
1764 asection *sgot;
1765 asection *srela;
1766 bfd_vma plt_index;
1767 bfd_vma got_offset;
1768 bfd_vma addend;
1769 Elf_Internal_Rela rela;
1770 bfd_byte *loc;
1771
1772 /* This symbol has an entry in the procedure linkage table. Set
1773 it up. */
1774 BFD_ASSERT (h->dynindx != -1);
1775
1776 splt = bfd_get_linker_section (dynobj, ".plt");
1777 sgot = bfd_get_linker_section (dynobj, ".got.plt");
1778 srela = bfd_get_linker_section (dynobj, ".rela.plt");
1779 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1780
1781 addend = 2 * (h->plt.offset & 1);
1782 h->plt.offset &= ~1;
1783
1784 /* Get the index in the procedure linkage table which
1785 corresponds to this symbol. This is the index of this symbol
1786 in all the symbols for which we are making plt entries. The
1787 first entry in the procedure linkage table is reserved. */
1788 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1789
1790 /* Get the offset into the .got table of the entry that
1791 corresponds to this function. Each .got entry is 4 bytes.
1792 The first two are reserved. */
1793 got_offset = (plt_index + 3) * 4;
1794
1795 /* Fill in the entry in the procedure linkage table. */
1796 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1797 PLT_ENTRY_SIZE);
1798
1799 /* The offset is relative to the first extension word. */
1800 bfd_put_32 (output_bfd,
1801 -(h->plt.offset + 8),
1802 splt->contents + h->plt.offset + 4);
1803
1804 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1805 splt->contents + h->plt.offset + 8);
1806
1807 /* Fill in the entry in the global offset table. */
1808 bfd_put_32 (output_bfd,
1809 (splt->output_section->vma
1810 + splt->output_offset
1811 + h->plt.offset) + addend,
1812 sgot->contents + got_offset);
1813
1814 /* Fill in the entry in the .rela.plt section. */
1815 rela.r_offset = (sgot->output_section->vma
1816 + sgot->output_offset
1817 + got_offset);
1818 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1819 rela.r_addend = addend;
1820 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1821 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1822
1823 if (!h->def_regular)
1824 {
1825 /* Mark the symbol as undefined, rather than as defined in
1826 the .plt section. Leave the value alone. */
1827 sym->st_shndx = SHN_UNDEF;
1828 }
1829 }
1830
1831 if (h->got.offset != (bfd_vma) -1)
1832 {
1833 asection *sgot;
1834 asection *srela;
1835 Elf_Internal_Rela rela;
1836 bfd_byte *loc;
1837
1838 /* This symbol has an entry in the global offset table. Set it
1839 up. */
1840 sgot = bfd_get_linker_section (dynobj, ".got");
1841 srela = bfd_get_linker_section (dynobj, ".rela.got");
1842 BFD_ASSERT (sgot != NULL && srela != NULL);
1843
1844 rela.r_offset = (sgot->output_section->vma
1845 + sgot->output_offset
1846 + h->got.offset);
1847 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1848 rela.r_addend = bfd_get_signed_32 (output_bfd,
1849 sgot->contents + h->got.offset);
1850
1851 loc = srela->contents;
1852 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1853 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1854 }
1855
1856 if (h->needs_copy)
1857 {
1858 asection *s;
1859 Elf_Internal_Rela rela;
1860 bfd_byte *loc;
1861
1862 /* This symbol needs a copy reloc. Set it up. */
1863 BFD_ASSERT (h->dynindx != -1
1864 && (h->root.type == bfd_link_hash_defined
1865 || h->root.type == bfd_link_hash_defweak));
1866
1867 s = bfd_get_linker_section (dynobj, ".rela.bss");
1868 BFD_ASSERT (s != NULL);
1869
1870 rela.r_offset = (h->root.u.def.value
1871 + h->root.u.def.section->output_section->vma
1872 + h->root.u.def.section->output_offset);
1873 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1874 rela.r_addend = 0;
1875 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1876 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1877 }
1878
1879 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1880 if (h == elf_hash_table (info)->hdynamic
1881 || h == elf_hash_table (info)->hgot)
1882 sym->st_shndx = SHN_ABS;
1883
1884 return TRUE;
1885 }
1886
1887 /* Finish up the dynamic sections. */
1888
1889 static bfd_boolean
1890 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1891 {
1892 bfd *dynobj;
1893 asection *sgot;
1894 asection *sdyn;
1895
1896 dynobj = elf_hash_table (info)->dynobj;
1897
1898 sgot = bfd_get_linker_section (dynobj, ".got.plt");
1899 BFD_ASSERT (sgot != NULL);
1900 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
1901
1902 if (elf_hash_table (info)->dynamic_sections_created)
1903 {
1904 asection *splt;
1905 Elf32_External_Dyn *dyncon, *dynconend;
1906
1907 splt = bfd_get_linker_section (dynobj, ".plt");
1908 BFD_ASSERT (splt != NULL && sdyn != NULL);
1909
1910 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1911 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1912 for (; dyncon < dynconend; dyncon++)
1913 {
1914 Elf_Internal_Dyn dyn;
1915 const char *name;
1916 asection *s;
1917
1918 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1919
1920 switch (dyn.d_tag)
1921 {
1922 default:
1923 break;
1924
1925 case DT_PLTGOT:
1926 name = ".got";
1927 goto get_vma;
1928 case DT_JMPREL:
1929 name = ".rela.plt";
1930 get_vma:
1931 s = bfd_get_section_by_name (output_bfd, name);
1932 BFD_ASSERT (s != NULL);
1933 dyn.d_un.d_ptr = s->vma;
1934 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1935 break;
1936
1937 case DT_PLTRELSZ:
1938 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1939 BFD_ASSERT (s != NULL);
1940 dyn.d_un.d_val = s->size;
1941 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1942 break;
1943
1944 case DT_RELASZ:
1945 /* The procedure linkage table relocs (DT_JMPREL) should
1946 not be included in the overall relocs (DT_RELA).
1947 Therefore, we override the DT_RELASZ entry here to
1948 make it not include the JMPREL relocs. Since the
1949 linker script arranges for .rela.plt to follow all
1950 other relocation sections, we don't have to worry
1951 about changing the DT_RELA entry. */
1952 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1953 if (s != NULL)
1954 dyn.d_un.d_val -= s->size;
1955 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1956 break;
1957 }
1958 }
1959
1960 /* Fill in the first entry in the procedure linkage table. */
1961 if (splt->size > 0)
1962 {
1963 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
1964 bfd_put_32 (output_bfd,
1965 (sgot->output_section->vma
1966 + sgot->output_offset + 4
1967 - (splt->output_section->vma + 6)),
1968 splt->contents + 2);
1969 bfd_put_32 (output_bfd,
1970 (sgot->output_section->vma
1971 + sgot->output_offset + 8
1972 - (splt->output_section->vma + 12)),
1973 splt->contents + 8);
1974 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1975 = PLT_ENTRY_SIZE;
1976 }
1977 }
1978
1979 /* Fill in the first three entries in the global offset table. */
1980 if (sgot->size > 0)
1981 {
1982 if (sdyn == NULL)
1983 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1984 else
1985 bfd_put_32 (output_bfd,
1986 sdyn->output_section->vma + sdyn->output_offset,
1987 sgot->contents);
1988 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1989 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1990 }
1991
1992 if (elf_section_data (sgot->output_section) != NULL)
1993 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1994
1995 return TRUE;
1996 }
1997
1998 static enum elf_reloc_type_class
1999 elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
2000 const asection *rel_sec ATTRIBUTE_UNUSED,
2001 const Elf_Internal_Rela *rela)
2002 {
2003 switch ((int) ELF32_R_TYPE (rela->r_info))
2004 {
2005 case R_VAX_RELATIVE:
2006 return reloc_class_relative;
2007 case R_VAX_JMP_SLOT:
2008 return reloc_class_plt;
2009 case R_VAX_COPY:
2010 return reloc_class_copy;
2011 default:
2012 return reloc_class_normal;
2013 }
2014 }
2015
2016 static bfd_vma
2017 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
2018 const arelent *rel ATTRIBUTE_UNUSED)
2019 {
2020 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
2021 }
2022
2023 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2024 #define TARGET_LITTLE_NAME "elf32-vax"
2025 #define ELF_MACHINE_CODE EM_VAX
2026 #define ELF_MAXPAGESIZE 0x1000
2027
2028 #define elf_backend_create_dynamic_sections \
2029 _bfd_elf_create_dynamic_sections
2030 #define bfd_elf32_bfd_link_hash_table_create \
2031 elf_vax_link_hash_table_create
2032 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2033
2034 #define elf_backend_check_relocs elf_vax_check_relocs
2035 #define elf_backend_adjust_dynamic_symbol \
2036 elf_vax_adjust_dynamic_symbol
2037 #define elf_backend_always_size_sections \
2038 elf_vax_always_size_sections
2039 #define elf_backend_size_dynamic_sections \
2040 elf_vax_size_dynamic_sections
2041 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2042 #define elf_backend_relocate_section elf_vax_relocate_section
2043 #define elf_backend_finish_dynamic_symbol \
2044 elf_vax_finish_dynamic_symbol
2045 #define elf_backend_finish_dynamic_sections \
2046 elf_vax_finish_dynamic_sections
2047 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2048 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2049 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2050 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2051 #define bfd_elf32_bfd_merge_private_bfd_data \
2052 elf32_vax_merge_private_bfd_data
2053 #define bfd_elf32_bfd_set_private_flags \
2054 elf32_vax_set_private_flags
2055 #define bfd_elf32_bfd_print_private_bfd_data \
2056 elf32_vax_print_private_bfd_data
2057
2058 #define elf_backend_can_gc_sections 1
2059 #define elf_backend_want_got_plt 1
2060 #define elf_backend_plt_readonly 1
2061 #define elf_backend_want_plt_sym 0
2062 #define elf_backend_got_header_size 16
2063 #define elf_backend_rela_normal 1
2064
2065 #include "elf32-target.h"
GDB Binutils - Deliverables
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