projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
* elf32-vax.c (elf_vax_relocate_section)
[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 *, PTR);
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 *, PTR)) (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_malloc (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, PTR 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
590 switch (ELF32_R_TYPE (rel->r_info))
591 {
592 case R_VAX_GOT32:
593 BFD_ASSERT (h != NULL);
594 if (h->forced_local
595 || h == elf_hash_table (info)->hgot
596 || h == elf_hash_table (info)->hplt)
597 break;
598
599 /* If this is a local symbol, we resolve it directly without
600 creating a global offset table entry. */
601 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
602 break;
603
604 /* This symbol requires a global offset table entry. */
605
606 if (dynobj == NULL)
607 {
608 /* Create the .got section. */
609 elf_hash_table (info)->dynobj = dynobj = abfd;
610 if (!_bfd_elf_create_got_section (dynobj, info))
611 return FALSE;
612 }
613
614 if (sgot == NULL)
615 {
616 sgot = bfd_get_section_by_name (dynobj, ".got");
617 BFD_ASSERT (sgot != NULL);
618 }
619
620 if (srelgot == NULL
621 && (h != NULL || info->shared))
622 {
623 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
624 if (srelgot == NULL)
625 {
626 srelgot = bfd_make_section_with_flags (dynobj,
627 ".rela.got",
628 (SEC_ALLOC
629 | SEC_LOAD
630 | SEC_HAS_CONTENTS
631 | SEC_IN_MEMORY
632 | SEC_LINKER_CREATED
633 | SEC_READONLY));
634 if (srelgot == NULL
635 || !bfd_set_section_alignment (dynobj, srelgot, 2))
636 return FALSE;
637 }
638 }
639
640 if (h != NULL)
641 {
642 struct elf_vax_link_hash_entry *eh;
643
644 eh = (struct elf_vax_link_hash_entry *) h;
645 if (h->got.refcount == -1)
646 {
647 h->got.refcount = 1;
648 eh->got_addend = rel->r_addend;
649 }
650 else
651 {
652 h->got.refcount++;
653 if (eh->got_addend != (bfd_vma) rel->r_addend)
654 (*_bfd_error_handler)
655 (_("%s: warning: GOT addend of %ld to `%s' does"
656 " not match previous GOT addend of %ld"),
657 bfd_get_filename (abfd), rel->r_addend,
658 h->root.root.string,
659 eh->got_addend);
660
661 }
662 }
663 break;
664
665 case R_VAX_PLT32:
666 /* This symbol requires a procedure linkage table entry. We
667 actually build the entry in adjust_dynamic_symbol,
668 because this might be a case of linking PIC code which is
669 never referenced by a dynamic object, in which case we
670 don't need to generate a procedure linkage table entry
671 after all. */
672
673 /* If this is a local symbol, we resolve it directly without
674 creating a procedure linkage table entry. */
675 BFD_ASSERT (h != NULL);
676 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT || h->forced_local)
677 break;
678
679 h->needs_plt = 1;
680 if (h->plt.refcount == -1)
681 h->plt.refcount = 1;
682 else
683 h->plt.refcount++;
684 break;
685
686 case R_VAX_PC8:
687 case R_VAX_PC16:
688 case R_VAX_PC32:
689 /* If we are creating a shared library and this is not a local
690 symbol, we need to copy the reloc into the shared library.
691 However when linking with -Bsymbolic and this is a global
692 symbol which is defined in an object we are including in the
693 link (i.e., DEF_REGULAR is set), then we can resolve the
694 reloc directly. At this point we have not seen all the input
695 files, so it is possible that DEF_REGULAR is not set now but
696 will be set later (it is never cleared). We account for that
697 possibility below by storing information in the
698 pcrel_relocs_copied field of the hash table entry. */
699 if (!(info->shared
700 && (sec->flags & SEC_ALLOC) != 0
701 && h != NULL
702 && (!info->symbolic
703 || !h->def_regular)))
704 {
705 if (h != NULL
706 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
707 && !h->forced_local)
708 {
709 /* Make sure a plt entry is created for this symbol if
710 it turns out to be a function defined by a dynamic
711 object. */
712 if (h->plt.refcount == -1)
713 h->plt.refcount = 1;
714 else
715 h->plt.refcount++;
716 }
717 break;
718 }
719 /* If this is a local symbol, we can resolve it directly. */
720 if (h != NULL
721 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
722 || h->forced_local))
723 break;
724
725 /* Fall through. */
726 case R_VAX_8:
727 case R_VAX_16:
728 case R_VAX_32:
729 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
730 {
731 /* Make sure a plt entry is created for this symbol if it
732 turns out to be a function defined by a dynamic object. */
733 if (h->plt.refcount == -1)
734 h->plt.refcount = 1;
735 else
736 h->plt.refcount++;
737 }
738
739 /* If we are creating a shared library, we need to copy the
740 reloc into the shared library. */
741 if (info->shared
742 && (sec->flags & SEC_ALLOC) != 0)
743 {
744 /* When creating a shared object, we must copy these
745 reloc types into the output file. We create a reloc
746 section in dynobj and make room for this reloc. */
747 if (sreloc == NULL)
748 {
749 sreloc = _bfd_elf_make_dynamic_reloc_section
750 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
751
752 if (sreloc == NULL)
753 return FALSE;
754
755 if (sec->flags & SEC_READONLY)
756 info->flags |= DF_TEXTREL;
757 }
758
759 sreloc->size += sizeof (Elf32_External_Rela);
760
761 /* If we are linking with -Bsymbolic, we count the number of
762 PC relative relocations we have entered for this symbol,
763 so that we can discard them again if the symbol is later
764 defined by a regular object. Note that this function is
765 only called if we are using a vaxelf linker hash table,
766 which means that h is really a pointer to an
767 elf_vax_link_hash_entry. */
768 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
769 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
770 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
771 && info->symbolic)
772 {
773 struct elf_vax_link_hash_entry *eh;
774 struct elf_vax_pcrel_relocs_copied *p;
775
776 eh = (struct elf_vax_link_hash_entry *) h;
777
778 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
779 if (p->section == sreloc)
780 break;
781
782 if (p == NULL)
783 {
784 p = ((struct elf_vax_pcrel_relocs_copied *)
785 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
786 if (p == NULL)
787 return FALSE;
788 p->next = eh->pcrel_relocs_copied;
789 eh->pcrel_relocs_copied = p;
790 p->section = sreloc;
791 p->count = 0;
792 }
793
794 ++p->count;
795 }
796 }
797
798 break;
799
800 /* This relocation describes the C++ object vtable hierarchy.
801 Reconstruct it for later use during GC. */
802 case R_VAX_GNU_VTINHERIT:
803 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
804 return FALSE;
805 break;
806
807 /* This relocation describes which C++ vtable entries are actually
808 used. Record for later use during GC. */
809 case R_VAX_GNU_VTENTRY:
810 BFD_ASSERT (h != NULL);
811 if (h != NULL
812 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
813 return FALSE;
814 break;
815
816 default:
817 break;
818 }
819 }
820
821 return TRUE;
822 }
823
824 /* Return the section that should be marked against GC for a given
825 relocation. */
826
827 static asection *
828 elf_vax_gc_mark_hook (asection *sec,
829 struct bfd_link_info *info,
830 Elf_Internal_Rela *rel,
831 struct elf_link_hash_entry *h,
832 Elf_Internal_Sym *sym)
833 {
834 if (h != NULL)
835 switch (ELF32_R_TYPE (rel->r_info))
836 {
837 case R_VAX_GNU_VTINHERIT:
838 case R_VAX_GNU_VTENTRY:
839 return NULL;
840 }
841
842 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
843 }
844
845 /* Update the got entry reference counts for the section being removed. */
846
847 static bfd_boolean
848 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
849 const Elf_Internal_Rela *relocs)
850 {
851 Elf_Internal_Shdr *symtab_hdr;
852 struct elf_link_hash_entry **sym_hashes;
853 const Elf_Internal_Rela *rel, *relend;
854 bfd *dynobj;
855
856 if (info->relocatable)
857 return TRUE;
858
859 dynobj = elf_hash_table (info)->dynobj;
860 if (dynobj == NULL)
861 return TRUE;
862
863 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
864 sym_hashes = elf_sym_hashes (abfd);
865
866 relend = relocs + sec->reloc_count;
867 for (rel = relocs; rel < relend; rel++)
868 {
869 unsigned long r_symndx;
870 struct elf_link_hash_entry *h = NULL;
871
872 r_symndx = ELF32_R_SYM (rel->r_info);
873 if (r_symndx >= symtab_hdr->sh_info)
874 {
875 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
876 while (h->root.type == bfd_link_hash_indirect
877 || h->root.type == bfd_link_hash_warning)
878 h = (struct elf_link_hash_entry *) h->root.u.i.link;
879 }
880
881 switch (ELF32_R_TYPE (rel->r_info))
882 {
883 case R_VAX_GOT32:
884 if (h != NULL && h->got.refcount > 0)
885 --h->got.refcount;
886 break;
887
888 case R_VAX_PLT32:
889 case R_VAX_PC8:
890 case R_VAX_PC16:
891 case R_VAX_PC32:
892 case R_VAX_8:
893 case R_VAX_16:
894 case R_VAX_32:
895 if (h != NULL && h->plt.refcount > 0)
896 --h->plt.refcount;
897 break;
898
899 default:
900 break;
901 }
902 }
903
904 return TRUE;
905 }
906
907 /* Adjust a symbol defined by a dynamic object and referenced by a
908 regular object. The current definition is in some section of the
909 dynamic object, but we're not including those sections. We have to
910 change the definition to something the rest of the link can
911 understand. */
912
913 static bfd_boolean
914 elf_vax_adjust_dynamic_symbol (info, h)
915 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 (! info->shared
938 && !h->def_dynamic
939 && !h->ref_dynamic
940 /* We must always create the plt entry if it was referenced
941 by a PLTxxO relocation. In this case we already recorded
942 it as a dynamic symbol. */
943 && h->dynindx == -1)
944 {
945 /* This case can occur if we saw a PLTxx reloc in an input
946 file, but the symbol was never referred to by a dynamic
947 object. In such a case, we don't actually need to build
948 a procedure linkage table, and we can just do a PCxx
949 reloc instead. */
950 BFD_ASSERT (h->needs_plt);
951 h->plt.offset = (bfd_vma) -1;
952 return TRUE;
953 }
954
955 /* GC may have rendered this entry unused. */
956 if (h->plt.refcount <= 0)
957 {
958 h->needs_plt = 0;
959 h->plt.offset = (bfd_vma) -1;
960 return TRUE;
961 }
962
963 /* Make sure this symbol is output as a dynamic symbol. */
964 if (h->dynindx == -1)
965 {
966 if (! bfd_elf_link_record_dynamic_symbol (info, h))
967 return FALSE;
968 }
969
970 s = bfd_get_section_by_name (dynobj, ".plt");
971 BFD_ASSERT (s != NULL);
972
973 /* If this is the first .plt entry, make room for the special
974 first entry. */
975 if (s->size == 0)
976 {
977 s->size += PLT_ENTRY_SIZE;
978 }
979
980 /* If this symbol is not defined in a regular file, and we are
981 not generating a shared library, then set the symbol to this
982 location in the .plt. This is required to make function
983 pointers compare as equal between the normal executable and
984 the shared library. */
985 if (!info->shared
986 && !h->def_regular)
987 {
988 h->root.u.def.section = s;
989 h->root.u.def.value = s->size;
990 }
991
992 h->plt.offset = s->size;
993
994 /* Make room for this entry. */
995 s->size += PLT_ENTRY_SIZE;
996
997 /* We also need to make an entry in the .got.plt section, which
998 will be placed in the .got section by the linker script. */
999
1000 s = bfd_get_section_by_name (dynobj, ".got.plt");
1001 BFD_ASSERT (s != NULL);
1002 s->size += 4;
1003
1004 /* We also need to make an entry in the .rela.plt section. */
1005
1006 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1007 BFD_ASSERT (s != NULL);
1008 s->size += sizeof (Elf32_External_Rela);
1009
1010 return TRUE;
1011 }
1012
1013 /* Reinitialize the plt offset now that it is not used as a reference
1014 count any more. */
1015 h->plt.offset = (bfd_vma) -1;
1016
1017 /* If this is a weak symbol, and there is a real definition, the
1018 processor independent code will have arranged for us to see the
1019 real definition first, and we can just use the same value. */
1020 if (h->u.weakdef != NULL)
1021 {
1022 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1023 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1024 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1025 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1026 return TRUE;
1027 }
1028
1029 /* This is a reference to a symbol defined by a dynamic object which
1030 is not a function. */
1031
1032 /* If we are creating a shared library, we must presume that the
1033 only references to the symbol are via the global offset table.
1034 For such cases we need not do anything here; the relocations will
1035 be handled correctly by relocate_section. */
1036 if (info->shared)
1037 return TRUE;
1038
1039 /* We must allocate the symbol in our .dynbss section, which will
1040 become part of the .bss section of the executable. There will be
1041 an entry for this symbol in the .dynsym section. The dynamic
1042 object will contain position independent code, so all references
1043 from the dynamic object to this symbol will go through the global
1044 offset table. The dynamic linker will use the .dynsym entry to
1045 determine the address it must put in the global offset table, so
1046 both the dynamic object and the regular object will refer to the
1047 same memory location for the variable. */
1048
1049 s = bfd_get_section_by_name (dynobj, ".dynbss");
1050 BFD_ASSERT (s != NULL);
1051
1052 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1053 copy the initial value out of the dynamic object and into the
1054 runtime process image. We need to remember the offset into the
1055 .rela.bss section we are going to use. */
1056 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1057 {
1058 asection *srel;
1059
1060 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1061 BFD_ASSERT (srel != NULL);
1062 srel->size += sizeof (Elf32_External_Rela);
1063 h->needs_copy = 1;
1064 }
1065
1066 return _bfd_elf_adjust_dynamic_copy (h, s);
1067 }
1068
1069 /* Set the sizes of the dynamic sections. */
1070
1071 static bfd_boolean
1072 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1073 {
1074 bfd *dynobj;
1075 asection *s;
1076 bfd_boolean plt;
1077 bfd_boolean relocs;
1078 bfd_boolean reltext;
1079
1080 dynobj = elf_hash_table (info)->dynobj;
1081 BFD_ASSERT (dynobj != NULL);
1082
1083 if (elf_hash_table (info)->dynamic_sections_created)
1084 {
1085 /* Set the contents of the .interp section to the interpreter. */
1086 if (info->executable)
1087 {
1088 s = bfd_get_section_by_name (dynobj, ".interp");
1089 BFD_ASSERT (s != NULL);
1090 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1091 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1092 }
1093 }
1094 else
1095 {
1096 /* We may have created entries in the .rela.got and .got sections.
1097 However, if we are not creating the dynamic sections, we will
1098 not actually use these entries. Reset the size of .rela.got
1099 and .got, which will cause it to get stripped from the output
1100 file below. */
1101 s = bfd_get_section_by_name (dynobj, ".rela.got");
1102 if (s != NULL)
1103 s->size = 0;
1104 s = bfd_get_section_by_name (dynobj, ".got.plt");
1105 if (s != NULL)
1106 s->size = 0;
1107 s = bfd_get_section_by_name (dynobj, ".got");
1108 if (s != NULL)
1109 s->size = 0;
1110 }
1111
1112 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1113 relative relocs against symbols defined in a regular object. We
1114 allocated space for them in the check_relocs routine, but we will not
1115 fill them in in the relocate_section routine. */
1116 if (info->shared && info->symbolic)
1117 elf_vax_link_hash_traverse (elf_hash_table (info),
1118 elf_vax_discard_copies,
1119 NULL);
1120
1121 /* If this is a -Bsymbolic shared link or a static link, we need to
1122 discard all the got entries we've recorded. Otherwise, we need to
1123 instantiate (allocate space for them). */
1124 elf_link_hash_traverse (elf_hash_table (info),
1125 elf_vax_instantiate_got_entries,
1126 (PTR) info);
1127
1128 /* The check_relocs and adjust_dynamic_symbol entry points have
1129 determined the sizes of the various dynamic sections. Allocate
1130 memory for them. */
1131 plt = FALSE;
1132 relocs = FALSE;
1133 reltext = FALSE;
1134 for (s = dynobj->sections; s != NULL; s = s->next)
1135 {
1136 const char *name;
1137
1138 if ((s->flags & SEC_LINKER_CREATED) == 0)
1139 continue;
1140
1141 /* It's OK to base decisions on the section name, because none
1142 of the dynobj section names depend upon the input files. */
1143 name = bfd_get_section_name (dynobj, s);
1144
1145 if (strcmp (name, ".plt") == 0)
1146 {
1147 /* Remember whether there is a PLT. */
1148 plt = s->size != 0;
1149 }
1150 else if (CONST_STRNEQ (name, ".rela"))
1151 {
1152 if (s->size != 0)
1153 {
1154 asection *target;
1155
1156 /* Remember whether there are any reloc sections other
1157 than .rela.plt. */
1158 if (strcmp (name, ".rela.plt") != 0)
1159 {
1160 const char *outname;
1161
1162 relocs = TRUE;
1163
1164 /* If this relocation section applies to a read only
1165 section, then we probably need a DT_TEXTREL
1166 entry. .rela.plt is actually associated with
1167 .got.plt, which is never readonly. */
1168 outname = bfd_get_section_name (output_bfd,
1169 s->output_section);
1170 target = bfd_get_section_by_name (output_bfd, outname + 5);
1171 if (target != NULL
1172 && (target->flags & SEC_READONLY) != 0
1173 && (target->flags & SEC_ALLOC) != 0)
1174 reltext = TRUE;
1175 }
1176
1177 /* We use the reloc_count field as a counter if we need
1178 to copy relocs into the output file. */
1179 s->reloc_count = 0;
1180 }
1181 }
1182 else if (! CONST_STRNEQ (name, ".got")
1183 && strcmp (name, ".dynbss") != 0)
1184 {
1185 /* It's not one of our sections, so don't allocate space. */
1186 continue;
1187 }
1188
1189 if (s->size == 0)
1190 {
1191 /* If we don't need this section, strip it from the
1192 output file. This is mostly to handle .rela.bss and
1193 .rela.plt. We must create both sections in
1194 create_dynamic_sections, because they must be created
1195 before the linker maps input sections to output
1196 sections. The linker does that before
1197 adjust_dynamic_symbol is called, and it is that
1198 function which decides whether anything needs to go
1199 into these sections. */
1200 s->flags |= SEC_EXCLUDE;
1201 continue;
1202 }
1203
1204 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1205 continue;
1206
1207 /* Allocate memory for the section contents. */
1208 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1209 if (s->contents == NULL)
1210 return FALSE;
1211 }
1212
1213 if (elf_hash_table (info)->dynamic_sections_created)
1214 {
1215 /* Add some entries to the .dynamic section. We fill in the
1216 values later, in elf_vax_finish_dynamic_sections, but we
1217 must add the entries now so that we get the correct size for
1218 the .dynamic section. The DT_DEBUG entry is filled in by the
1219 dynamic linker and used by the debugger. */
1220 #define add_dynamic_entry(TAG, VAL) \
1221 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1222
1223 if (!info->shared)
1224 {
1225 if (!add_dynamic_entry (DT_DEBUG, 0))
1226 return FALSE;
1227 }
1228
1229 if (plt)
1230 {
1231 if (!add_dynamic_entry (DT_PLTGOT, 0)
1232 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1233 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1234 || !add_dynamic_entry (DT_JMPREL, 0))
1235 return FALSE;
1236 }
1237
1238 if (relocs)
1239 {
1240 if (!add_dynamic_entry (DT_RELA, 0)
1241 || !add_dynamic_entry (DT_RELASZ, 0)
1242 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1243 return FALSE;
1244 }
1245
1246 if (reltext || (info->flags & DF_TEXTREL) != 0)
1247 {
1248 if (!add_dynamic_entry (DT_TEXTREL, 0))
1249 return FALSE;
1250 }
1251 }
1252 #undef add_dynamic_entry
1253
1254 return TRUE;
1255 }
1256
1257 /* This function is called via elf_vax_link_hash_traverse if we are
1258 creating a shared object with -Bsymbolic. It discards the space
1259 allocated to copy PC relative relocs against symbols which are defined
1260 in regular objects. We allocated space for them in the check_relocs
1261 routine, but we won't fill them in in the relocate_section routine. */
1262
1263 static bfd_boolean
1264 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1265 PTR ignore ATTRIBUTE_UNUSED)
1266 {
1267 struct elf_vax_pcrel_relocs_copied *s;
1268
1269 /* We only discard relocs for symbols defined in a regular object. */
1270 if (!h->root.def_regular)
1271 return TRUE;
1272
1273 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1274 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1275
1276 return TRUE;
1277 }
1278
1279 /* This function is called via elf_link_hash_traverse. It looks for entries
1280 that have GOT or PLT (.GOT) references. If creating a static object or a
1281 shared object with -Bsymbolic, it resets the reference count back to 0
1282 and sets the offset to -1 so normal PC32 relocation will be done. If
1283 creating a shared object or executable, space in the .got and .rela.got
1284 will be reserved for the symbol. */
1285
1286 static bfd_boolean
1287 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, PTR infoptr)
1288 {
1289 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1290 bfd *dynobj;
1291 asection *sgot;
1292 asection *srelgot;
1293
1294 /* We don't care about non-GOT (and non-PLT) entries. */
1295 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1296 return TRUE;
1297
1298 dynobj = elf_hash_table (info)->dynobj;
1299 if (dynobj == NULL)
1300 return TRUE;
1301
1302 sgot = bfd_get_section_by_name (dynobj, ".got");
1303 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1304
1305 if (!elf_hash_table (info)->dynamic_sections_created
1306 || (info->shared && info->symbolic)
1307 || h->forced_local)
1308 {
1309 h->got.refcount = 0;
1310 h->got.offset = (bfd_vma) -1;
1311 h->plt.refcount = 0;
1312 h->plt.offset = (bfd_vma) -1;
1313 }
1314 else if (h->got.refcount > 0)
1315 {
1316 bfd_boolean dyn;
1317
1318 /* Make sure this symbol is output as a dynamic symbol. */
1319 if (h->dynindx == -1)
1320 {
1321 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1322 return FALSE;
1323 }
1324
1325 dyn = elf_hash_table (info)->dynamic_sections_created;
1326 /* Allocate space in the .got and .rela.got sections. */
1327 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1328 && (info->shared
1329 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1330 {
1331 sgot->size += 4;
1332 srelgot->size += sizeof (Elf32_External_Rela);
1333 }
1334 }
1335
1336 return TRUE;
1337 }
1338
1339 /* Relocate an VAX ELF section. */
1340
1341 static bfd_boolean
1342 elf_vax_relocate_section (bfd *output_bfd,
1343 struct bfd_link_info *info,
1344 bfd *input_bfd,
1345 asection *input_section,
1346 bfd_byte *contents,
1347 Elf_Internal_Rela *relocs,
1348 Elf_Internal_Sym *local_syms,
1349 asection **local_sections)
1350 {
1351 bfd *dynobj;
1352 Elf_Internal_Shdr *symtab_hdr;
1353 struct elf_link_hash_entry **sym_hashes;
1354 bfd_vma plt_index;
1355 bfd_vma got_offset;
1356 asection *sgot;
1357 asection *splt;
1358 asection *sgotplt;
1359 asection *sreloc;
1360 Elf_Internal_Rela *rel;
1361 Elf_Internal_Rela *relend;
1362
1363 dynobj = elf_hash_table (info)->dynobj;
1364 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1365 sym_hashes = elf_sym_hashes (input_bfd);
1366
1367 sgot = NULL;
1368 splt = NULL;
1369 sgotplt = NULL;
1370 sreloc = NULL;
1371
1372 rel = relocs;
1373 relend = relocs + input_section->reloc_count;
1374 for (; rel < relend; rel++)
1375 {
1376 int r_type;
1377 reloc_howto_type *howto;
1378 unsigned long r_symndx;
1379 struct elf_link_hash_entry *h;
1380 Elf_Internal_Sym *sym;
1381 asection *sec;
1382 bfd_vma relocation;
1383 bfd_reloc_status_type r;
1384
1385 r_type = ELF32_R_TYPE (rel->r_info);
1386 if (r_type < 0 || r_type >= (int) R_VAX_max)
1387 {
1388 bfd_set_error (bfd_error_bad_value);
1389 return FALSE;
1390 }
1391 howto = howto_table + r_type;
1392
1393 r_symndx = ELF32_R_SYM (rel->r_info);
1394 h = NULL;
1395 sym = NULL;
1396 sec = NULL;
1397 if (r_symndx < symtab_hdr->sh_info)
1398 {
1399 sym = local_syms + r_symndx;
1400 sec = local_sections[r_symndx];
1401 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1402 }
1403 else
1404 {
1405 bfd_boolean unresolved_reloc;
1406 bfd_boolean warned;
1407
1408 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1409 r_symndx, symtab_hdr, sym_hashes,
1410 h, sec, relocation,
1411 unresolved_reloc, warned);
1412
1413 if ((h->root.type == bfd_link_hash_defined
1414 || h->root.type == bfd_link_hash_defweak)
1415 && ((r_type == R_VAX_PLT32
1416 && h->plt.offset != (bfd_vma) -1
1417 && !h->forced_local
1418 && elf_hash_table (info)->dynamic_sections_created)
1419 || (r_type == R_VAX_GOT32
1420 && h->got.offset != (bfd_vma) -1
1421 && !h->forced_local
1422 && elf_hash_table (info)->dynamic_sections_created
1423 && (! info->shared
1424 || (! info->symbolic && h->dynindx != -1)
1425 || !h->def_regular))
1426 || (info->shared
1427 && ((! info->symbolic && h->dynindx != -1)
1428 || !h->def_regular)
1429 && ((input_section->flags & SEC_ALLOC) != 0
1430 /* DWARF will emit R_VAX_32 relocations in its
1431 sections against symbols defined externally
1432 in shared libraries. We can't do anything
1433 with them here. */
1434
1435 || ((input_section->flags & SEC_DEBUGGING) != 0
1436 && h->def_dynamic))
1437 && (r_type == R_VAX_8
1438 || r_type == R_VAX_16
1439 || r_type == R_VAX_32))))
1440 /* In these cases, we don't need the relocation
1441 value. We check specially because in some
1442 obscure cases sec->output_section will be NULL. */
1443 relocation = 0;
1444 }
1445
1446 if (sec != NULL && discarded_section (sec))
1447 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1448 rel, 1, relend, howto, 0, contents);
1449
1450 if (info->relocatable)
1451 continue;
1452
1453 switch (r_type)
1454 {
1455 case R_VAX_GOT32:
1456 /* Relocation is to the address of the entry for this symbol
1457 in the global offset table. */
1458 if (h == NULL
1459 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1460 || h->got.offset == (bfd_vma) -1
1461 || h->forced_local)
1462 break;
1463
1464 /* Relocation is the offset of the entry for this symbol in
1465 the global offset table. */
1466
1467 {
1468 bfd_boolean dyn;
1469 bfd_vma off;
1470
1471 if (sgot == NULL)
1472 {
1473 sgot = bfd_get_section_by_name (dynobj, ".got");
1474 BFD_ASSERT (sgot != NULL);
1475 }
1476
1477 BFD_ASSERT (h != NULL);
1478 off = h->got.offset;
1479 BFD_ASSERT (off != (bfd_vma) -1);
1480 BFD_ASSERT (off < sgot->size);
1481
1482 dyn = elf_hash_table (info)->dynamic_sections_created;
1483 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1484 || (info->shared
1485 && SYMBOL_REFERENCES_LOCAL (info, h)))
1486 {
1487 /* The symbol was forced to be local
1488 because of a version file.. We must initialize
1489 this entry in the global offset table. Since
1490 the offset must always be a multiple of 4, we
1491 use the least significant bit to record whether
1492 we have initialized it already.
1493
1494 When doing a dynamic link, we create a .rela.got
1495 relocation entry to initialize the value. This
1496 is done in the finish_dynamic_symbol routine. */
1497 if ((off & 1) != 0)
1498 off &= ~1;
1499 else
1500 {
1501 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1502 sgot->contents + off);
1503 h->got.offset |= 1;
1504 }
1505 } else {
1506 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1507 }
1508
1509 relocation = sgot->output_offset + off;
1510 /* The GOT relocation uses the addend. */
1511 rel->r_addend = 0;
1512
1513 /* Change the reference to be indirect. */
1514 contents[rel->r_offset - 1] |= 0x10;
1515 relocation += sgot->output_section->vma;
1516 }
1517 break;
1518
1519 case R_VAX_PC32:
1520 /* If we are creating an executable and the function this
1521 reloc refers to is in a shared lib, then we made a PLT
1522 entry for this symbol and need to handle the reloc like
1523 a PLT reloc. */
1524 if (info->shared)
1525 goto r_vax_pc32_shared;
1526 /* Fall through. */
1527 case R_VAX_PLT32:
1528 /* Relocation is to the entry for this symbol in the
1529 procedure linkage table. */
1530
1531 /* Resolve a PLTxx reloc against a local symbol directly,
1532 without using the procedure linkage table. */
1533 if (h == NULL
1534 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1535 || h->forced_local)
1536 break;
1537
1538 if (h->plt.offset == (bfd_vma) -1
1539 || !elf_hash_table (info)->dynamic_sections_created)
1540 {
1541 /* We didn't make a PLT entry for this symbol. This
1542 happens when statically linking PIC code, or when
1543 using -Bsymbolic. */
1544 break;
1545 }
1546
1547 if (splt == NULL)
1548 {
1549 splt = bfd_get_section_by_name (dynobj, ".plt");
1550 BFD_ASSERT (splt != NULL);
1551 }
1552
1553 if (sgotplt == NULL)
1554 {
1555 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1556 BFD_ASSERT (sgotplt != NULL);
1557 }
1558
1559 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1560
1561 /* Get the offset into the .got table of the entry that
1562 corresponds to this function. Each .got entry is 4 bytes.
1563 The first two are reserved. */
1564 got_offset = (plt_index + 3) * 4;
1565
1566 /* We want the relocation to point into the .got.plt instead
1567 of the plt itself. */
1568 relocation = (sgotplt->output_section->vma
1569 + sgotplt->output_offset
1570 + got_offset);
1571 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1572 if (rel->r_addend == 2)
1573 {
1574 h->plt.offset |= 1;
1575 }
1576 else if (rel->r_addend != 0)
1577 (*_bfd_error_handler)
1578 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1579 bfd_get_filename (input_bfd), rel->r_addend,
1580 h->root.root.string,
1581 bfd_get_section_name (input_bfd, input_section));
1582 rel->r_addend = 0;
1583
1584 break;
1585
1586 case R_VAX_PC8:
1587 case R_VAX_PC16:
1588 r_vax_pc32_shared:
1589 if (h == NULL
1590 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1591 || h->forced_local)
1592 break;
1593 /* Fall through. */
1594 case R_VAX_8:
1595 case R_VAX_16:
1596 case R_VAX_32:
1597 if (info->shared
1598 && r_symndx != STN_UNDEF
1599 && (input_section->flags & SEC_ALLOC) != 0
1600 && ((r_type != R_VAX_PC8
1601 && r_type != R_VAX_PC16
1602 && r_type != R_VAX_PC32)
1603 || ((input_section->flags & SEC_CODE)
1604 && (!info->symbolic
1605 || (!h->def_regular && h->type != STT_SECTION)))))
1606 {
1607 Elf_Internal_Rela outrel;
1608 bfd_byte *loc;
1609 bfd_boolean skip, relocate;
1610
1611 /* When generating a shared object, these relocations
1612 are copied into the output file to be resolved at run
1613 time. */
1614 if (sreloc == NULL)
1615 {
1616 sreloc = _bfd_elf_get_dynamic_reloc_section
1617 (input_bfd, input_section, /*rela?*/ TRUE);
1618 if (sreloc == NULL)
1619 return FALSE;
1620 }
1621
1622 skip = FALSE;
1623 relocate = FALSE;
1624
1625 outrel.r_offset =
1626 _bfd_elf_section_offset (output_bfd, info, input_section,
1627 rel->r_offset);
1628 if (outrel.r_offset == (bfd_vma) -1)
1629 skip = TRUE;
1630 if (outrel.r_offset == (bfd_vma) -2)
1631 skip = TRUE, relocate = TRUE;
1632 outrel.r_offset += (input_section->output_section->vma
1633 + input_section->output_offset);
1634
1635 if (skip)
1636 memset (&outrel, 0, sizeof outrel);
1637 /* h->dynindx may be -1 if the symbol was marked to
1638 become local. */
1639 else if (h != NULL
1640 && ((! info->symbolic && h->dynindx != -1)
1641 || !h->def_regular))
1642 {
1643 BFD_ASSERT (h->dynindx != -1);
1644 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1645 outrel.r_addend = relocation + rel->r_addend;
1646 }
1647 else
1648 {
1649 if (r_type == R_VAX_32)
1650 {
1651 relocate = TRUE;
1652 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1653 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1654 &contents[rel->r_offset]) == 0);
1655 outrel.r_addend = relocation + rel->r_addend;
1656 }
1657 else
1658 {
1659 long indx;
1660
1661 if (bfd_is_abs_section (sec))
1662 indx = 0;
1663 else if (sec == NULL || sec->owner == NULL)
1664 {
1665 bfd_set_error (bfd_error_bad_value);
1666 return FALSE;
1667 }
1668 else
1669 {
1670 asection *osec;
1671
1672 /* We are turning this relocation into one
1673 against a section symbol. It would be
1674 proper to subtract the symbol's value,
1675 osec->vma, from the emitted reloc addend,
1676 but ld.so expects buggy relocs. */
1677 osec = sec->output_section;
1678 indx = elf_section_data (osec)->dynindx;
1679 if (indx == 0)
1680 {
1681 struct elf_link_hash_table *htab;
1682 htab = elf_hash_table (info);
1683 osec = htab->text_index_section;
1684 indx = elf_section_data (osec)->dynindx;
1685 }
1686 BFD_ASSERT (indx != 0);
1687 }
1688
1689 outrel.r_info = ELF32_R_INFO (indx, r_type);
1690 outrel.r_addend = relocation + rel->r_addend;
1691 }
1692 }
1693
1694 if ((input_section->flags & SEC_CODE) != 0
1695 || (info->shared
1696 && ELF32_R_TYPE (outrel.r_info) != R_VAX_32
1697 && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE
1698 && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY
1699 && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT
1700 && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT))
1701 {
1702 if (h != NULL)
1703 (*_bfd_error_handler)
1704 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1705 bfd_get_filename (input_bfd), howto->name,
1706 h->root.root.string,
1707 bfd_get_section_name (input_bfd, input_section));
1708 else
1709 (*_bfd_error_handler)
1710 (_("%s: warning: %s relocation to 0x%x from %s section"),
1711 bfd_get_filename (input_bfd), howto->name,
1712 outrel.r_addend,
1713 bfd_get_section_name (input_bfd, input_section));
1714 }
1715 loc = sreloc->contents;
1716 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1717 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1718
1719 /* This reloc will be computed at runtime, so there's no
1720 need to do anything now, except for R_VAX_32
1721 relocations that have been turned into
1722 R_VAX_RELATIVE. */
1723 if (!relocate)
1724 continue;
1725 }
1726
1727 break;
1728
1729 case R_VAX_GNU_VTINHERIT:
1730 case R_VAX_GNU_VTENTRY:
1731 /* These are no-ops in the end. */
1732 continue;
1733
1734 default:
1735 break;
1736 }
1737
1738 /* VAX PCREL relocations are from the end of relocation, not the start.
1739 So subtract the difference from the relocation amount since we can't
1740 add it to the offset. */
1741 if (howto->pc_relative && howto->pcrel_offset)
1742 relocation -= bfd_get_reloc_size(howto);
1743
1744 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1745 contents, rel->r_offset,
1746 relocation, rel->r_addend);
1747
1748 if (r != bfd_reloc_ok)
1749 {
1750 switch (r)
1751 {
1752 default:
1753 case bfd_reloc_outofrange:
1754 abort ();
1755 case bfd_reloc_overflow:
1756 {
1757 const char *name;
1758
1759 if (h != NULL)
1760 name = NULL;
1761 else
1762 {
1763 name = bfd_elf_string_from_elf_section (input_bfd,
1764 symtab_hdr->sh_link,
1765 sym->st_name);
1766 if (name == NULL)
1767 return FALSE;
1768 if (*name == '\0')
1769 name = bfd_section_name (input_bfd, sec);
1770 }
1771 if (!(info->callbacks->reloc_overflow
1772 (info, (h ? &h->root : NULL), name, howto->name,
1773 (bfd_vma) 0, input_bfd, input_section,
1774 rel->r_offset)))
1775 return FALSE;
1776 }
1777 break;
1778 }
1779 }
1780 }
1781
1782 return TRUE;
1783 }
1784
1785 /* Finish up dynamic symbol handling. We set the contents of various
1786 dynamic sections here. */
1787
1788 static bfd_boolean
1789 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1790 struct elf_link_hash_entry *h,
1791 Elf_Internal_Sym *sym)
1792 {
1793 bfd *dynobj;
1794
1795 dynobj = elf_hash_table (info)->dynobj;
1796
1797 if (h->plt.offset != (bfd_vma) -1)
1798 {
1799 asection *splt;
1800 asection *sgot;
1801 asection *srela;
1802 bfd_vma plt_index;
1803 bfd_vma got_offset;
1804 bfd_vma addend;
1805 Elf_Internal_Rela rela;
1806 bfd_byte *loc;
1807
1808 /* This symbol has an entry in the procedure linkage table. Set
1809 it up. */
1810 BFD_ASSERT (h->dynindx != -1);
1811
1812 splt = bfd_get_section_by_name (dynobj, ".plt");
1813 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1814 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1815 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1816
1817 addend = 2 * (h->plt.offset & 1);
1818 h->plt.offset &= ~1;
1819
1820 /* Get the index in the procedure linkage table which
1821 corresponds to this symbol. This is the index of this symbol
1822 in all the symbols for which we are making plt entries. The
1823 first entry in the procedure linkage table is reserved. */
1824 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1825
1826 /* Get the offset into the .got table of the entry that
1827 corresponds to this function. Each .got entry is 4 bytes.
1828 The first two are reserved. */
1829 got_offset = (plt_index + 3) * 4;
1830
1831 /* Fill in the entry in the procedure linkage table. */
1832 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1833 PLT_ENTRY_SIZE);
1834
1835 /* The offset is relative to the first extension word. */
1836 bfd_put_32 (output_bfd,
1837 -(h->plt.offset + 8),
1838 splt->contents + h->plt.offset + 4);
1839
1840 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1841 splt->contents + h->plt.offset + 8);
1842
1843 /* Fill in the entry in the global offset table. */
1844 bfd_put_32 (output_bfd,
1845 (splt->output_section->vma
1846 + splt->output_offset
1847 + h->plt.offset) + addend,
1848 sgot->contents + got_offset);
1849
1850 /* Fill in the entry in the .rela.plt section. */
1851 rela.r_offset = (sgot->output_section->vma
1852 + sgot->output_offset
1853 + got_offset);
1854 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1855 rela.r_addend = addend;
1856 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1857 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1858
1859 if (!h->def_regular)
1860 {
1861 /* Mark the symbol as undefined, rather than as defined in
1862 the .plt section. Leave the value alone. */
1863 sym->st_shndx = SHN_UNDEF;
1864 }
1865 }
1866
1867 if (h->got.offset != (bfd_vma) -1)
1868 {
1869 asection *sgot;
1870 asection *srela;
1871 Elf_Internal_Rela rela;
1872 bfd_byte *loc;
1873
1874 /* This symbol has an entry in the global offset table. Set it
1875 up. */
1876 sgot = bfd_get_section_by_name (dynobj, ".got");
1877 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1878 BFD_ASSERT (sgot != NULL && srela != NULL);
1879
1880 rela.r_offset = (sgot->output_section->vma
1881 + sgot->output_offset
1882 + (h->got.offset &~ 1));
1883
1884 /* If the symbol was forced to be local because of a version file
1885 locally we just want to emit a RELATIVE reloc. The entry in
1886 the global offset table will already have been initialized in
1887 the relocate_section function. */
1888 if (info->shared
1889 && h->dynindx == -1
1890 && h->def_regular)
1891 {
1892 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1893 }
1894 else
1895 {
1896 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1897 }
1898 rela.r_addend = bfd_get_signed_32 (output_bfd,
1899 (sgot->contents
1900 + (h->got.offset & ~1)));
1901
1902 loc = srela->contents;
1903 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1904 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1905 }
1906
1907 if (h->needs_copy)
1908 {
1909 asection *s;
1910 Elf_Internal_Rela rela;
1911 bfd_byte *loc;
1912
1913 /* This symbol needs a copy reloc. Set it up. */
1914 BFD_ASSERT (h->dynindx != -1
1915 && (h->root.type == bfd_link_hash_defined
1916 || h->root.type == bfd_link_hash_defweak));
1917
1918 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1919 ".rela.bss");
1920 BFD_ASSERT (s != NULL);
1921
1922 rela.r_offset = (h->root.u.def.value
1923 + h->root.u.def.section->output_section->vma
1924 + h->root.u.def.section->output_offset);
1925 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1926 rela.r_addend = 0;
1927 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1928 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1929 }
1930
1931 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1932 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1933 || h == elf_hash_table (info)->hgot)
1934 sym->st_shndx = SHN_ABS;
1935
1936 return TRUE;
1937 }
1938
1939 /* Finish up the dynamic sections. */
1940
1941 static bfd_boolean
1942 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1943 {
1944 bfd *dynobj;
1945 asection *sgot;
1946 asection *sdyn;
1947
1948 dynobj = elf_hash_table (info)->dynobj;
1949
1950 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1951 BFD_ASSERT (sgot != NULL);
1952 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1953
1954 if (elf_hash_table (info)->dynamic_sections_created)
1955 {
1956 asection *splt;
1957 Elf32_External_Dyn *dyncon, *dynconend;
1958
1959 splt = bfd_get_section_by_name (dynobj, ".plt");
1960 BFD_ASSERT (splt != NULL && sdyn != NULL);
1961
1962 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1963 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1964 for (; dyncon < dynconend; dyncon++)
1965 {
1966 Elf_Internal_Dyn dyn;
1967 const char *name;
1968 asection *s;
1969
1970 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1971
1972 switch (dyn.d_tag)
1973 {
1974 default:
1975 break;
1976
1977 case DT_PLTGOT:
1978 name = ".got";
1979 goto get_vma;
1980 case DT_JMPREL:
1981 name = ".rela.plt";
1982 get_vma:
1983 s = bfd_get_section_by_name (output_bfd, name);
1984 BFD_ASSERT (s != NULL);
1985 dyn.d_un.d_ptr = s->vma;
1986 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1987 break;
1988
1989 case DT_PLTRELSZ:
1990 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1991 BFD_ASSERT (s != NULL);
1992 dyn.d_un.d_val = s->size;
1993 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1994 break;
1995
1996 case DT_RELASZ:
1997 /* The procedure linkage table relocs (DT_JMPREL) should
1998 not be included in the overall relocs (DT_RELA).
1999 Therefore, we override the DT_RELASZ entry here to
2000 make it not include the JMPREL relocs. Since the
2001 linker script arranges for .rela.plt to follow all
2002 other relocation sections, we don't have to worry
2003 about changing the DT_RELA entry. */
2004 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2005 if (s != NULL)
2006 dyn.d_un.d_val -= s->size;
2007 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2008 break;
2009 }
2010 }
2011
2012 /* Fill in the first entry in the procedure linkage table. */
2013 if (splt->size > 0)
2014 {
2015 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2016 bfd_put_32 (output_bfd,
2017 (sgot->output_section->vma
2018 + sgot->output_offset + 4
2019 - (splt->output_section->vma + 6)),
2020 splt->contents + 2);
2021 bfd_put_32 (output_bfd,
2022 (sgot->output_section->vma
2023 + sgot->output_offset + 8
2024 - (splt->output_section->vma + 12)),
2025 splt->contents + 8);
2026 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2027 = PLT_ENTRY_SIZE;
2028 }
2029 }
2030
2031 /* Fill in the first three entries in the global offset table. */
2032 if (sgot->size > 0)
2033 {
2034 if (sdyn == NULL)
2035 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2036 else
2037 bfd_put_32 (output_bfd,
2038 sdyn->output_section->vma + sdyn->output_offset,
2039 sgot->contents);
2040 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2041 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2042 }
2043
2044 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2045
2046 return TRUE;
2047 }
2048
2049 static enum elf_reloc_type_class
2050 elf_vax_reloc_type_class (const Elf_Internal_Rela *rela)
2051 {
2052 switch ((int) ELF32_R_TYPE (rela->r_info))
2053 {
2054 case R_VAX_RELATIVE:
2055 return reloc_class_relative;
2056 case R_VAX_JMP_SLOT:
2057 return reloc_class_plt;
2058 case R_VAX_COPY:
2059 return reloc_class_copy;
2060 default:
2061 return reloc_class_normal;
2062 }
2063 }
2064
2065 static bfd_vma
2066 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
2067 const arelent *rel ATTRIBUTE_UNUSED)
2068 {
2069 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
2070 }
2071
2072 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2073 #define TARGET_LITTLE_NAME "elf32-vax"
2074 #define ELF_MACHINE_CODE EM_VAX
2075 #define ELF_MAXPAGESIZE 0x1000
2076
2077 #define elf_backend_create_dynamic_sections \
2078 _bfd_elf_create_dynamic_sections
2079 #define bfd_elf32_bfd_link_hash_table_create \
2080 elf_vax_link_hash_table_create
2081 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2082
2083 #define elf_backend_check_relocs elf_vax_check_relocs
2084 #define elf_backend_adjust_dynamic_symbol \
2085 elf_vax_adjust_dynamic_symbol
2086 #define elf_backend_size_dynamic_sections \
2087 elf_vax_size_dynamic_sections
2088 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2089 #define elf_backend_relocate_section elf_vax_relocate_section
2090 #define elf_backend_finish_dynamic_symbol \
2091 elf_vax_finish_dynamic_symbol
2092 #define elf_backend_finish_dynamic_sections \
2093 elf_vax_finish_dynamic_sections
2094 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2095 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2096 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2097 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2098 #define bfd_elf32_bfd_merge_private_bfd_data \
2099 elf32_vax_merge_private_bfd_data
2100 #define bfd_elf32_bfd_set_private_flags \
2101 elf32_vax_set_private_flags
2102 #define bfd_elf32_bfd_print_private_bfd_data \
2103 elf32_vax_print_private_bfd_data
2104
2105 #define elf_backend_can_gc_sections 1
2106 #define elf_backend_want_got_plt 1
2107 #define elf_backend_plt_readonly 1
2108 #define elf_backend_want_plt_sym 0
2109 #define elf_backend_got_header_size 16
2110 #define elf_backend_rela_normal 1
2111
2112 #include "elf32-target.h"
GDB Binutils - Deliverables
This page took 0.072241 seconds and 5 git commands to generate.