projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
* elf32-vax.c (elf_vax_discard_got_entries): New function.
[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 if (h->forced_local
599 || h == elf_hash_table (info)->hgot
600 || h == elf_hash_table (info)->hplt)
601 break;
602
603 /* If this is a local symbol, we resolve it directly without
604 creating a global offset table entry. */
605 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
606 break;
607
608 /* This symbol requires a global offset table entry. */
609
610 if (dynobj == NULL)
611 {
612 /* Create the .got section. */
613 elf_hash_table (info)->dynobj = dynobj = abfd;
614 if (!_bfd_elf_create_got_section (dynobj, info))
615 return FALSE;
616 }
617
618 if (sgot == NULL)
619 {
620 sgot = bfd_get_linker_section (dynobj, ".got");
621 BFD_ASSERT (sgot != NULL);
622 }
623
624 if (srelgot == NULL
625 && (h != NULL || info->shared))
626 {
627 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
628 if (srelgot == NULL)
629 {
630 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
631 | SEC_IN_MEMORY | SEC_LINKER_CREATED
632 | SEC_READONLY);
633
634 srelgot = bfd_make_section_anyway_with_flags (dynobj,
635 ".rela.got",
636 flags);
637 if (srelgot == NULL
638 || !bfd_set_section_alignment (dynobj, srelgot, 2))
639 return FALSE;
640 }
641 }
642
643 if (h != NULL)
644 {
645 struct elf_vax_link_hash_entry *eh;
646
647 eh = (struct elf_vax_link_hash_entry *) h;
648 if (h->got.refcount == -1)
649 {
650 h->got.refcount = 1;
651 eh->got_addend = rel->r_addend;
652 }
653 else
654 {
655 h->got.refcount++;
656 if (eh->got_addend != (bfd_vma) rel->r_addend)
657 (*_bfd_error_handler)
658 (_("%s: warning: GOT addend of %ld to `%s' does"
659 " not match previous GOT addend of %ld"),
660 bfd_get_filename (abfd), rel->r_addend,
661 h->root.root.string,
662 eh->got_addend);
663
664 }
665 }
666 break;
667
668 case R_VAX_PLT32:
669 /* This symbol requires a procedure linkage table entry. We
670 actually build the entry in adjust_dynamic_symbol,
671 because this might be a case of linking PIC code which is
672 never referenced by a dynamic object, in which case we
673 don't need to generate a procedure linkage table entry
674 after all. */
675
676 /* If this is a local symbol, we resolve it directly without
677 creating a procedure linkage table entry. */
678 BFD_ASSERT (h != NULL);
679 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT || h->forced_local)
680 break;
681
682 h->needs_plt = 1;
683 if (h->plt.refcount == -1)
684 h->plt.refcount = 1;
685 else
686 h->plt.refcount++;
687 break;
688
689 case R_VAX_PC8:
690 case R_VAX_PC16:
691 case R_VAX_PC32:
692 /* If we are creating a shared library and this is not a local
693 symbol, we need to copy the reloc into the shared library.
694 However when linking with -Bsymbolic and this is a global
695 symbol which is defined in an object we are including in the
696 link (i.e., DEF_REGULAR is set), then we can resolve the
697 reloc directly. At this point we have not seen all the input
698 files, so it is possible that DEF_REGULAR is not set now but
699 will be set later (it is never cleared). We account for that
700 possibility below by storing information in the
701 pcrel_relocs_copied field of the hash table entry. */
702 if (!(info->shared
703 && (sec->flags & SEC_ALLOC) != 0
704 && h != NULL
705 && (!info->symbolic
706 || !h->def_regular)))
707 {
708 if (h != NULL
709 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
710 && !h->forced_local)
711 {
712 /* Make sure a plt entry is created for this symbol if
713 it turns out to be a function defined by a dynamic
714 object. */
715 if (h->plt.refcount == -1)
716 h->plt.refcount = 1;
717 else
718 h->plt.refcount++;
719 }
720 break;
721 }
722 /* If this is a local symbol, we can resolve it directly. */
723 if (h != NULL
724 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
725 || h->forced_local))
726 break;
727
728 /* Fall through. */
729 case R_VAX_8:
730 case R_VAX_16:
731 case R_VAX_32:
732 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
733 {
734 /* Make sure a plt entry is created for this symbol if it
735 turns out to be a function defined by a dynamic object. */
736 if (h->plt.refcount == -1)
737 h->plt.refcount = 1;
738 else
739 h->plt.refcount++;
740 }
741
742 /* If we are creating a shared library, we need to copy the
743 reloc into the shared library. */
744 if (info->shared
745 && (sec->flags & SEC_ALLOC) != 0)
746 {
747 /* When creating a shared object, we must copy these
748 reloc types into the output file. We create a reloc
749 section in dynobj and make room for this reloc. */
750 if (sreloc == NULL)
751 {
752 sreloc = _bfd_elf_make_dynamic_reloc_section
753 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
754
755 if (sreloc == NULL)
756 return FALSE;
757
758 if (sec->flags & SEC_READONLY)
759 info->flags |= DF_TEXTREL;
760 }
761
762 sreloc->size += sizeof (Elf32_External_Rela);
763
764 /* If we are linking with -Bsymbolic, we count the number of
765 PC relative relocations we have entered for this symbol,
766 so that we can discard them again if the symbol is later
767 defined by a regular object. Note that this function is
768 only called if we are using a vaxelf linker hash table,
769 which means that h is really a pointer to an
770 elf_vax_link_hash_entry. */
771 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
772 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
773 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
774 && info->symbolic)
775 {
776 struct elf_vax_link_hash_entry *eh;
777 struct elf_vax_pcrel_relocs_copied *p;
778
779 eh = (struct elf_vax_link_hash_entry *) h;
780
781 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
782 if (p->section == sreloc)
783 break;
784
785 if (p == NULL)
786 {
787 p = ((struct elf_vax_pcrel_relocs_copied *)
788 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
789 if (p == NULL)
790 return FALSE;
791 p->next = eh->pcrel_relocs_copied;
792 eh->pcrel_relocs_copied = p;
793 p->section = sreloc;
794 p->count = 0;
795 }
796
797 ++p->count;
798 }
799 }
800
801 break;
802
803 /* This relocation describes the C++ object vtable hierarchy.
804 Reconstruct it for later use during GC. */
805 case R_VAX_GNU_VTINHERIT:
806 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
807 return FALSE;
808 break;
809
810 /* This relocation describes which C++ vtable entries are actually
811 used. Record for later use during GC. */
812 case R_VAX_GNU_VTENTRY:
813 BFD_ASSERT (h != NULL);
814 if (h != NULL
815 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
816 return FALSE;
817 break;
818
819 default:
820 break;
821 }
822 }
823
824 return TRUE;
825 }
826
827 /* Return the section that should be marked against GC for a given
828 relocation. */
829
830 static asection *
831 elf_vax_gc_mark_hook (asection *sec,
832 struct bfd_link_info *info,
833 Elf_Internal_Rela *rel,
834 struct elf_link_hash_entry *h,
835 Elf_Internal_Sym *sym)
836 {
837 if (h != NULL)
838 switch (ELF32_R_TYPE (rel->r_info))
839 {
840 case R_VAX_GNU_VTINHERIT:
841 case R_VAX_GNU_VTENTRY:
842 return NULL;
843 }
844
845 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
846 }
847
848 /* Update the got entry reference counts for the section being removed. */
849
850 static bfd_boolean
851 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
852 const Elf_Internal_Rela *relocs)
853 {
854 Elf_Internal_Shdr *symtab_hdr;
855 struct elf_link_hash_entry **sym_hashes;
856 const Elf_Internal_Rela *rel, *relend;
857 bfd *dynobj;
858
859 if (info->relocatable)
860 return TRUE;
861
862 dynobj = elf_hash_table (info)->dynobj;
863 if (dynobj == NULL)
864 return TRUE;
865
866 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
867 sym_hashes = elf_sym_hashes (abfd);
868
869 relend = relocs + sec->reloc_count;
870 for (rel = relocs; rel < relend; rel++)
871 {
872 unsigned long r_symndx;
873 struct elf_link_hash_entry *h = NULL;
874
875 r_symndx = ELF32_R_SYM (rel->r_info);
876 if (r_symndx >= symtab_hdr->sh_info)
877 {
878 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
879 while (h->root.type == bfd_link_hash_indirect
880 || h->root.type == bfd_link_hash_warning)
881 h = (struct elf_link_hash_entry *) h->root.u.i.link;
882 }
883
884 switch (ELF32_R_TYPE (rel->r_info))
885 {
886 case R_VAX_GOT32:
887 if (h != NULL && h->got.refcount > 0)
888 --h->got.refcount;
889 break;
890
891 case R_VAX_PLT32:
892 case R_VAX_PC8:
893 case R_VAX_PC16:
894 case R_VAX_PC32:
895 case R_VAX_8:
896 case R_VAX_16:
897 case R_VAX_32:
898 if (h != NULL && h->plt.refcount > 0)
899 --h->plt.refcount;
900 break;
901
902 default:
903 break;
904 }
905 }
906
907 return TRUE;
908 }
909
910 /* Adjust a symbol defined by a dynamic object and referenced by a
911 regular object. The current definition is in some section of the
912 dynamic object, but we're not including those sections. We have to
913 change the definition to something the rest of the link can
914 understand. */
915
916 static bfd_boolean
917 elf_vax_adjust_dynamic_symbol (struct bfd_link_info *info,
918 struct elf_link_hash_entry *h)
919 {
920 bfd *dynobj;
921 asection *s;
922
923 dynobj = elf_hash_table (info)->dynobj;
924
925 /* Make sure we know what is going on here. */
926 BFD_ASSERT (dynobj != NULL
927 && (h->needs_plt
928 || h->u.weakdef != NULL
929 || (h->def_dynamic
930 && h->ref_regular
931 && !h->def_regular)));
932
933 /* If this is a function, put it in the procedure linkage table. We
934 will fill in the contents of the procedure linkage table later,
935 when we know the address of the .got section. */
936 if (h->type == STT_FUNC
937 || h->needs_plt)
938 {
939 if (h->plt.refcount <= 0
940 || SYMBOL_CALLS_LOCAL (info, h)
941 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
942 && h->root.type == bfd_link_hash_undefweak))
943 {
944 /* This case can occur if we saw a PLTxx reloc in an input
945 file, but the symbol was never referred to by a dynamic
946 object, or if all references were garbage collected. In
947 such a case, we don't actually need to build a procedure
948 linkage table, and we can just do a PCxx reloc instead. */
949 h->plt.offset = (bfd_vma) -1;
950 h->needs_plt = 0;
951 return TRUE;
952 }
953
954 s = bfd_get_linker_section (dynobj, ".plt");
955 BFD_ASSERT (s != NULL);
956
957 /* If this is the first .plt entry, make room for the special
958 first entry. */
959 if (s->size == 0)
960 {
961 s->size += PLT_ENTRY_SIZE;
962 }
963
964 /* If this symbol is not defined in a regular file, and we are
965 not generating a shared library, then set the symbol to this
966 location in the .plt. This is required to make function
967 pointers compare as equal between the normal executable and
968 the shared library. */
969 if (!info->shared
970 && !h->def_regular)
971 {
972 h->root.u.def.section = s;
973 h->root.u.def.value = s->size;
974 }
975
976 h->plt.offset = s->size;
977
978 /* Make room for this entry. */
979 s->size += PLT_ENTRY_SIZE;
980
981 /* We also need to make an entry in the .got.plt section, which
982 will be placed in the .got section by the linker script. */
983
984 s = bfd_get_linker_section (dynobj, ".got.plt");
985 BFD_ASSERT (s != NULL);
986 s->size += 4;
987
988 /* We also need to make an entry in the .rela.plt section. */
989
990 s = bfd_get_linker_section (dynobj, ".rela.plt");
991 BFD_ASSERT (s != NULL);
992 s->size += sizeof (Elf32_External_Rela);
993
994 return TRUE;
995 }
996
997 /* Reinitialize the plt offset now that it is not used as a reference
998 count any more. */
999 h->plt.offset = (bfd_vma) -1;
1000
1001 /* If this is a weak symbol, and there is a real definition, the
1002 processor independent code will have arranged for us to see the
1003 real definition first, and we can just use the same value. */
1004 if (h->u.weakdef != NULL)
1005 {
1006 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1007 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1008 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1009 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1010 return TRUE;
1011 }
1012
1013 /* This is a reference to a symbol defined by a dynamic object which
1014 is not a function. */
1015
1016 /* If we are creating a shared library, we must presume that the
1017 only references to the symbol are via the global offset table.
1018 For such cases we need not do anything here; the relocations will
1019 be handled correctly by relocate_section. */
1020 if (info->shared)
1021 return TRUE;
1022
1023 /* We must allocate the symbol in our .dynbss section, which will
1024 become part of the .bss section of the executable. There will be
1025 an entry for this symbol in the .dynsym section. The dynamic
1026 object will contain position independent code, so all references
1027 from the dynamic object to this symbol will go through the global
1028 offset table. The dynamic linker will use the .dynsym entry to
1029 determine the address it must put in the global offset table, so
1030 both the dynamic object and the regular object will refer to the
1031 same memory location for the variable. */
1032
1033 s = bfd_get_linker_section (dynobj, ".dynbss");
1034 BFD_ASSERT (s != NULL);
1035
1036 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1037 copy the initial value out of the dynamic object and into the
1038 runtime process image. We need to remember the offset into the
1039 .rela.bss section we are going to use. */
1040 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1041 {
1042 asection *srel;
1043
1044 srel = bfd_get_linker_section (dynobj, ".rela.bss");
1045 BFD_ASSERT (srel != NULL);
1046 srel->size += sizeof (Elf32_External_Rela);
1047 h->needs_copy = 1;
1048 }
1049
1050 return _bfd_elf_adjust_dynamic_copy (h, s);
1051 }
1052
1053 /* This function is called via elf_link_hash_traverse. It resets GOT
1054 and PLT (.GOT) reference counts back to -1 so normal PC32 relocation
1055 will be done. */
1056
1057 static bfd_boolean
1058 elf_vax_discard_got_entries (struct elf_link_hash_entry *h,
1059 void *infoptr ATTRIBUTE_UNUSED)
1060 {
1061 h->got.refcount = -1;
1062 h->plt.refcount = -1;
1063
1064 return TRUE;
1065 }
1066
1067 /* Discard unused dynamic data if this is a static link. */
1068
1069 static bfd_boolean
1070 elf_vax_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1071 struct bfd_link_info *info)
1072 {
1073 bfd *dynobj;
1074 asection *s;
1075
1076 dynobj = elf_hash_table (info)->dynobj;
1077
1078 if (dynobj && !elf_hash_table (info)->dynamic_sections_created)
1079 {
1080 /* We may have created entries in the .rela.got and .got sections.
1081 However, if we are not creating the dynamic sections, we will
1082 not actually use these entries. Reset the size of .rela.got
1083 and .got, which will cause it to get stripped from the output
1084 file below. */
1085 s = bfd_get_linker_section (dynobj, ".rela.got");
1086 if (s != NULL)
1087 s->size = 0;
1088 s = bfd_get_linker_section (dynobj, ".got.plt");
1089 if (s != NULL)
1090 s->size = 0;
1091 s = bfd_get_linker_section (dynobj, ".got");
1092 if (s != NULL)
1093 s->size = 0;
1094 }
1095
1096 /* If this is a static link, we need to discard all the got entries we've
1097 recorded. */
1098 if (!dynobj || !elf_hash_table (info)->dynamic_sections_created)
1099 elf_link_hash_traverse (elf_hash_table (info),
1100 elf_vax_discard_got_entries,
1101 info);
1102
1103 return TRUE;
1104 }
1105
1106 /* Set the sizes of the dynamic sections. */
1107
1108 static bfd_boolean
1109 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1110 {
1111 bfd *dynobj;
1112 asection *s;
1113 bfd_boolean plt;
1114 bfd_boolean relocs;
1115 bfd_boolean reltext;
1116
1117 dynobj = elf_hash_table (info)->dynobj;
1118 BFD_ASSERT (dynobj != NULL);
1119
1120 if (elf_hash_table (info)->dynamic_sections_created)
1121 {
1122 /* Set the contents of the .interp section to the interpreter. */
1123 if (info->executable)
1124 {
1125 s = bfd_get_linker_section (dynobj, ".interp");
1126 BFD_ASSERT (s != NULL);
1127 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1128 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1129 }
1130 }
1131
1132 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1133 relative relocs against symbols defined in a regular object. We
1134 allocated space for them in the check_relocs routine, but we will not
1135 fill them in in the relocate_section routine. */
1136 if (info->shared && info->symbolic)
1137 elf_vax_link_hash_traverse (elf_hash_table (info),
1138 elf_vax_discard_copies,
1139 NULL);
1140
1141 /* If this is a -Bsymbolic shared link, we need to discard all the got
1142 entries we've recorded. Otherwise, we need to instantiate (allocate
1143 space for them). */
1144 elf_link_hash_traverse (elf_hash_table (info),
1145 elf_vax_instantiate_got_entries,
1146 info);
1147
1148 /* The check_relocs and adjust_dynamic_symbol entry points have
1149 determined the sizes of the various dynamic sections. Allocate
1150 memory for them. */
1151 plt = FALSE;
1152 relocs = FALSE;
1153 reltext = FALSE;
1154 for (s = dynobj->sections; s != NULL; s = s->next)
1155 {
1156 const char *name;
1157
1158 if ((s->flags & SEC_LINKER_CREATED) == 0)
1159 continue;
1160
1161 /* It's OK to base decisions on the section name, because none
1162 of the dynobj section names depend upon the input files. */
1163 name = bfd_get_section_name (dynobj, s);
1164
1165 if (strcmp (name, ".plt") == 0)
1166 {
1167 /* Remember whether there is a PLT. */
1168 plt = s->size != 0;
1169 }
1170 else if (CONST_STRNEQ (name, ".rela"))
1171 {
1172 if (s->size != 0)
1173 {
1174 asection *target;
1175
1176 /* Remember whether there are any reloc sections other
1177 than .rela.plt. */
1178 if (strcmp (name, ".rela.plt") != 0)
1179 {
1180 const char *outname;
1181
1182 relocs = TRUE;
1183
1184 /* If this relocation section applies to a read only
1185 section, then we probably need a DT_TEXTREL
1186 entry. .rela.plt is actually associated with
1187 .got.plt, which is never readonly. */
1188 outname = bfd_get_section_name (output_bfd,
1189 s->output_section);
1190 target = bfd_get_section_by_name (output_bfd, outname + 5);
1191 if (target != NULL
1192 && (target->flags & SEC_READONLY) != 0
1193 && (target->flags & SEC_ALLOC) != 0)
1194 reltext = TRUE;
1195 }
1196
1197 /* We use the reloc_count field as a counter if we need
1198 to copy relocs into the output file. */
1199 s->reloc_count = 0;
1200 }
1201 }
1202 else if (! CONST_STRNEQ (name, ".got")
1203 && strcmp (name, ".dynbss") != 0)
1204 {
1205 /* It's not one of our sections, so don't allocate space. */
1206 continue;
1207 }
1208
1209 if (s->size == 0)
1210 {
1211 /* If we don't need this section, strip it from the
1212 output file. This is mostly to handle .rela.bss and
1213 .rela.plt. We must create both sections in
1214 create_dynamic_sections, because they must be created
1215 before the linker maps input sections to output
1216 sections. The linker does that before
1217 adjust_dynamic_symbol is called, and it is that
1218 function which decides whether anything needs to go
1219 into these sections. */
1220 s->flags |= SEC_EXCLUDE;
1221 continue;
1222 }
1223
1224 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1225 continue;
1226
1227 /* Allocate memory for the section contents. */
1228 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1229 if (s->contents == NULL)
1230 return FALSE;
1231 }
1232
1233 if (elf_hash_table (info)->dynamic_sections_created)
1234 {
1235 /* Add some entries to the .dynamic section. We fill in the
1236 values later, in elf_vax_finish_dynamic_sections, but we
1237 must add the entries now so that we get the correct size for
1238 the .dynamic section. The DT_DEBUG entry is filled in by the
1239 dynamic linker and used by the debugger. */
1240 #define add_dynamic_entry(TAG, VAL) \
1241 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1242
1243 if (!info->shared)
1244 {
1245 if (!add_dynamic_entry (DT_DEBUG, 0))
1246 return FALSE;
1247 }
1248
1249 if (plt)
1250 {
1251 if (!add_dynamic_entry (DT_PLTGOT, 0)
1252 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1253 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1254 || !add_dynamic_entry (DT_JMPREL, 0))
1255 return FALSE;
1256 }
1257
1258 if (relocs)
1259 {
1260 if (!add_dynamic_entry (DT_RELA, 0)
1261 || !add_dynamic_entry (DT_RELASZ, 0)
1262 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1263 return FALSE;
1264 }
1265
1266 if (reltext || (info->flags & DF_TEXTREL) != 0)
1267 {
1268 if (!add_dynamic_entry (DT_TEXTREL, 0))
1269 return FALSE;
1270 }
1271 }
1272 #undef add_dynamic_entry
1273
1274 return TRUE;
1275 }
1276
1277 /* This function is called via elf_vax_link_hash_traverse if we are
1278 creating a shared object with -Bsymbolic. It discards the space
1279 allocated to copy PC relative relocs against symbols which are defined
1280 in regular objects. We allocated space for them in the check_relocs
1281 routine, but we won't fill them in in the relocate_section routine. */
1282
1283 static bfd_boolean
1284 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1285 void * ignore ATTRIBUTE_UNUSED)
1286 {
1287 struct elf_vax_pcrel_relocs_copied *s;
1288
1289 /* We only discard relocs for symbols defined in a regular object. */
1290 if (!h->root.def_regular)
1291 return TRUE;
1292
1293 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1294 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1295
1296 return TRUE;
1297 }
1298
1299 /* This function is called via elf_link_hash_traverse. It looks for
1300 entries that have GOT or PLT (.GOT) references. If creating a shared
1301 object with -Bsymbolic, or the symbol has been forced local, then it
1302 resets the reference count back to -1 so normal PC32 relocation will
1303 be done. Otherwise space in the .got and .rela.got will be reserved
1304 for the symbol. */
1305
1306 static bfd_boolean
1307 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr)
1308 {
1309 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1310 bfd *dynobj;
1311 asection *sgot;
1312 asection *srelgot;
1313
1314 /* We don't care about non-GOT (and non-PLT) entries. */
1315 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1316 return TRUE;
1317
1318 dynobj = elf_hash_table (info)->dynobj;
1319 BFD_ASSERT (dynobj != NULL);
1320
1321 sgot = bfd_get_linker_section (dynobj, ".got");
1322 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1323
1324 if ((info->shared && info->symbolic)
1325 || h->forced_local)
1326 {
1327 h->got.refcount = -1;
1328 h->plt.refcount = -1;
1329 }
1330 else if (h->got.refcount > 0)
1331 {
1332 bfd_boolean dyn;
1333
1334 /* Make sure this symbol is output as a dynamic symbol. */
1335 if (h->dynindx == -1)
1336 {
1337 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1338 return FALSE;
1339 }
1340
1341 dyn = elf_hash_table (info)->dynamic_sections_created;
1342 /* Allocate space in the .got and .rela.got sections. */
1343 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1344 && (info->shared
1345 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1346 {
1347 sgot->size += 4;
1348 srelgot->size += sizeof (Elf32_External_Rela);
1349 }
1350 }
1351
1352 return TRUE;
1353 }
1354
1355 /* Relocate an VAX ELF section. */
1356
1357 static bfd_boolean
1358 elf_vax_relocate_section (bfd *output_bfd,
1359 struct bfd_link_info *info,
1360 bfd *input_bfd,
1361 asection *input_section,
1362 bfd_byte *contents,
1363 Elf_Internal_Rela *relocs,
1364 Elf_Internal_Sym *local_syms,
1365 asection **local_sections)
1366 {
1367 bfd *dynobj;
1368 Elf_Internal_Shdr *symtab_hdr;
1369 struct elf_link_hash_entry **sym_hashes;
1370 bfd_vma plt_index;
1371 bfd_vma got_offset;
1372 asection *sgot;
1373 asection *splt;
1374 asection *sgotplt;
1375 asection *sreloc;
1376 Elf_Internal_Rela *rel;
1377 Elf_Internal_Rela *relend;
1378
1379 dynobj = elf_hash_table (info)->dynobj;
1380 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1381 sym_hashes = elf_sym_hashes (input_bfd);
1382
1383 sgot = NULL;
1384 splt = NULL;
1385 sgotplt = NULL;
1386 sreloc = NULL;
1387
1388 rel = relocs;
1389 relend = relocs + input_section->reloc_count;
1390 for (; rel < relend; rel++)
1391 {
1392 int r_type;
1393 reloc_howto_type *howto;
1394 unsigned long r_symndx;
1395 struct elf_link_hash_entry *h;
1396 Elf_Internal_Sym *sym;
1397 asection *sec;
1398 bfd_vma relocation;
1399 bfd_reloc_status_type r;
1400
1401 r_type = ELF32_R_TYPE (rel->r_info);
1402 if (r_type < 0 || r_type >= (int) R_VAX_max)
1403 {
1404 bfd_set_error (bfd_error_bad_value);
1405 return FALSE;
1406 }
1407 howto = howto_table + r_type;
1408
1409 r_symndx = ELF32_R_SYM (rel->r_info);
1410 h = NULL;
1411 sym = NULL;
1412 sec = NULL;
1413 if (r_symndx < symtab_hdr->sh_info)
1414 {
1415 sym = local_syms + r_symndx;
1416 sec = local_sections[r_symndx];
1417 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1418 }
1419 else
1420 {
1421 bfd_boolean unresolved_reloc;
1422 bfd_boolean warned;
1423
1424 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1425 r_symndx, symtab_hdr, sym_hashes,
1426 h, sec, relocation,
1427 unresolved_reloc, warned);
1428
1429 if ((h->root.type == bfd_link_hash_defined
1430 || h->root.type == bfd_link_hash_defweak)
1431 && ((r_type == R_VAX_PLT32
1432 && h->plt.offset != (bfd_vma) -1
1433 && !h->forced_local
1434 && elf_hash_table (info)->dynamic_sections_created)
1435 || (r_type == R_VAX_GOT32
1436 && h->got.offset != (bfd_vma) -1
1437 && !h->forced_local
1438 && elf_hash_table (info)->dynamic_sections_created
1439 && (! info->shared
1440 || (! info->symbolic && h->dynindx != -1)
1441 || !h->def_regular))
1442 || (info->shared
1443 && ((! info->symbolic && h->dynindx != -1)
1444 || !h->def_regular)
1445 && ((input_section->flags & SEC_ALLOC) != 0
1446 /* DWARF will emit R_VAX_32 relocations in its
1447 sections against symbols defined externally
1448 in shared libraries. We can't do anything
1449 with them here. */
1450
1451 || ((input_section->flags & SEC_DEBUGGING) != 0
1452 && h->def_dynamic))
1453 && (r_type == R_VAX_8
1454 || r_type == R_VAX_16
1455 || r_type == R_VAX_32))))
1456 /* In these cases, we don't need the relocation
1457 value. We check specially because in some
1458 obscure cases sec->output_section will be NULL. */
1459 relocation = 0;
1460 }
1461
1462 if (sec != NULL && discarded_section (sec))
1463 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1464 rel, 1, relend, howto, 0, contents);
1465
1466 if (info->relocatable)
1467 continue;
1468
1469 switch (r_type)
1470 {
1471 case R_VAX_GOT32:
1472 /* Relocation is to the address of the entry for this symbol
1473 in the global offset table. */
1474 if (h == NULL
1475 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1476 || h->got.offset == (bfd_vma) -1
1477 || h->forced_local)
1478 break;
1479
1480 /* Relocation is the offset of the entry for this symbol in
1481 the global offset table. */
1482
1483 {
1484 bfd_boolean dyn;
1485 bfd_vma off;
1486
1487 if (sgot == NULL)
1488 {
1489 sgot = bfd_get_linker_section (dynobj, ".got");
1490 BFD_ASSERT (sgot != NULL);
1491 }
1492
1493 BFD_ASSERT (h != NULL);
1494 off = h->got.offset;
1495 BFD_ASSERT (off != (bfd_vma) -1);
1496 BFD_ASSERT (off < sgot->size);
1497
1498 dyn = elf_hash_table (info)->dynamic_sections_created;
1499 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1500 || (info->shared
1501 && SYMBOL_REFERENCES_LOCAL (info, h)))
1502 {
1503 /* The symbol was forced to be local
1504 because of a version file.. We must initialize
1505 this entry in the global offset table. Since
1506 the offset must always be a multiple of 4, we
1507 use the least significant bit to record whether
1508 we have initialized it already.
1509
1510 When doing a dynamic link, we create a .rela.got
1511 relocation entry to initialize the value. This
1512 is done in the finish_dynamic_symbol routine. */
1513 if ((off & 1) != 0)
1514 off &= ~1;
1515 else
1516 {
1517 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1518 sgot->contents + off);
1519 h->got.offset |= 1;
1520 }
1521 } else {
1522 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1523 }
1524
1525 relocation = sgot->output_offset + off;
1526 /* The GOT relocation uses the addend. */
1527 rel->r_addend = 0;
1528
1529 /* Change the reference to be indirect. */
1530 contents[rel->r_offset - 1] |= 0x10;
1531 relocation += sgot->output_section->vma;
1532 }
1533 break;
1534
1535 case R_VAX_PC32:
1536 /* If we are creating an executable and the function this
1537 reloc refers to is in a shared lib, then we made a PLT
1538 entry for this symbol and need to handle the reloc like
1539 a PLT reloc. */
1540 if (info->shared)
1541 goto r_vax_pc32_shared;
1542 /* Fall through. */
1543 case R_VAX_PLT32:
1544 /* Relocation is to the entry for this symbol in the
1545 procedure linkage table. */
1546
1547 /* Resolve a PLTxx reloc against a local symbol directly,
1548 without using the procedure linkage table. */
1549 if (h == NULL
1550 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1551 || h->forced_local)
1552 break;
1553
1554 if (h->plt.offset == (bfd_vma) -1
1555 || !elf_hash_table (info)->dynamic_sections_created)
1556 {
1557 /* We didn't make a PLT entry for this symbol. This
1558 happens when statically linking PIC code, or when
1559 using -Bsymbolic. */
1560 break;
1561 }
1562
1563 if (splt == NULL)
1564 {
1565 splt = bfd_get_linker_section (dynobj, ".plt");
1566 BFD_ASSERT (splt != NULL);
1567 }
1568
1569 if (sgotplt == NULL)
1570 {
1571 sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1572 BFD_ASSERT (sgotplt != NULL);
1573 }
1574
1575 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1576
1577 /* Get the offset into the .got table of the entry that
1578 corresponds to this function. Each .got entry is 4 bytes.
1579 The first two are reserved. */
1580 got_offset = (plt_index + 3) * 4;
1581
1582 /* We want the relocation to point into the .got.plt instead
1583 of the plt itself. */
1584 relocation = (sgotplt->output_section->vma
1585 + sgotplt->output_offset
1586 + got_offset);
1587 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1588 if (rel->r_addend == 2)
1589 {
1590 h->plt.offset |= 1;
1591 }
1592 else if (rel->r_addend != 0)
1593 (*_bfd_error_handler)
1594 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1595 bfd_get_filename (input_bfd), rel->r_addend,
1596 h->root.root.string,
1597 bfd_get_section_name (input_bfd, input_section));
1598 rel->r_addend = 0;
1599
1600 break;
1601
1602 case R_VAX_PC8:
1603 case R_VAX_PC16:
1604 r_vax_pc32_shared:
1605 if (h == NULL
1606 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1607 || h->forced_local)
1608 break;
1609 /* Fall through. */
1610 case R_VAX_8:
1611 case R_VAX_16:
1612 case R_VAX_32:
1613 if (info->shared
1614 && r_symndx != STN_UNDEF
1615 && (input_section->flags & SEC_ALLOC) != 0
1616 && ((r_type != R_VAX_PC8
1617 && r_type != R_VAX_PC16
1618 && r_type != R_VAX_PC32)
1619 || ((input_section->flags & SEC_CODE)
1620 && (!info->symbolic
1621 || (!h->def_regular && h->type != STT_SECTION)))))
1622 {
1623 Elf_Internal_Rela outrel;
1624 bfd_byte *loc;
1625 bfd_boolean skip, relocate;
1626
1627 /* When generating a shared object, these relocations
1628 are copied into the output file to be resolved at run
1629 time. */
1630 if (sreloc == NULL)
1631 {
1632 sreloc = _bfd_elf_get_dynamic_reloc_section
1633 (input_bfd, input_section, /*rela?*/ TRUE);
1634 if (sreloc == NULL)
1635 return FALSE;
1636 }
1637
1638 skip = FALSE;
1639 relocate = FALSE;
1640
1641 outrel.r_offset =
1642 _bfd_elf_section_offset (output_bfd, info, input_section,
1643 rel->r_offset);
1644 if (outrel.r_offset == (bfd_vma) -1)
1645 skip = TRUE;
1646 if (outrel.r_offset == (bfd_vma) -2)
1647 skip = TRUE, relocate = TRUE;
1648 outrel.r_offset += (input_section->output_section->vma
1649 + input_section->output_offset);
1650
1651 if (skip)
1652 memset (&outrel, 0, sizeof outrel);
1653 /* h->dynindx may be -1 if the symbol was marked to
1654 become local. */
1655 else if (h != NULL
1656 && ((! info->symbolic && h->dynindx != -1)
1657 || !h->def_regular))
1658 {
1659 BFD_ASSERT (h->dynindx != -1);
1660 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1661 outrel.r_addend = relocation + rel->r_addend;
1662 }
1663 else
1664 {
1665 if (r_type == R_VAX_32)
1666 {
1667 relocate = TRUE;
1668 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1669 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1670 &contents[rel->r_offset]) == 0);
1671 outrel.r_addend = relocation + rel->r_addend;
1672 }
1673 else
1674 {
1675 long indx;
1676
1677 if (bfd_is_abs_section (sec))
1678 indx = 0;
1679 else if (sec == NULL || sec->owner == NULL)
1680 {
1681 bfd_set_error (bfd_error_bad_value);
1682 return FALSE;
1683 }
1684 else
1685 {
1686 asection *osec;
1687
1688 /* We are turning this relocation into one
1689 against a section symbol. It would be
1690 proper to subtract the symbol's value,
1691 osec->vma, from the emitted reloc addend,
1692 but ld.so expects buggy relocs. */
1693 osec = sec->output_section;
1694 indx = elf_section_data (osec)->dynindx;
1695 if (indx == 0)
1696 {
1697 struct elf_link_hash_table *htab;
1698 htab = elf_hash_table (info);
1699 osec = htab->text_index_section;
1700 indx = elf_section_data (osec)->dynindx;
1701 }
1702 BFD_ASSERT (indx != 0);
1703 }
1704
1705 outrel.r_info = ELF32_R_INFO (indx, r_type);
1706 outrel.r_addend = relocation + rel->r_addend;
1707 }
1708 }
1709
1710 if ((input_section->flags & SEC_CODE) != 0
1711 || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32
1712 && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE
1713 && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY
1714 && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT
1715 && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT))
1716 {
1717 if (h != NULL)
1718 (*_bfd_error_handler)
1719 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1720 bfd_get_filename (input_bfd), howto->name,
1721 h->root.root.string,
1722 bfd_get_section_name (input_bfd, input_section));
1723 else
1724 (*_bfd_error_handler)
1725 (_("%s: warning: %s relocation to 0x%x from %s section"),
1726 bfd_get_filename (input_bfd), howto->name,
1727 outrel.r_addend,
1728 bfd_get_section_name (input_bfd, input_section));
1729 }
1730 loc = sreloc->contents;
1731 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1732 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1733
1734 /* This reloc will be computed at runtime, so there's no
1735 need to do anything now, except for R_VAX_32
1736 relocations that have been turned into
1737 R_VAX_RELATIVE. */
1738 if (!relocate)
1739 continue;
1740 }
1741
1742 break;
1743
1744 case R_VAX_GNU_VTINHERIT:
1745 case R_VAX_GNU_VTENTRY:
1746 /* These are no-ops in the end. */
1747 continue;
1748
1749 default:
1750 break;
1751 }
1752
1753 /* VAX PCREL relocations are from the end of relocation, not the start.
1754 So subtract the difference from the relocation amount since we can't
1755 add it to the offset. */
1756 if (howto->pc_relative && howto->pcrel_offset)
1757 relocation -= bfd_get_reloc_size(howto);
1758
1759 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1760 contents, rel->r_offset,
1761 relocation, rel->r_addend);
1762
1763 if (r != bfd_reloc_ok)
1764 {
1765 switch (r)
1766 {
1767 default:
1768 case bfd_reloc_outofrange:
1769 abort ();
1770 case bfd_reloc_overflow:
1771 {
1772 const char *name;
1773
1774 if (h != NULL)
1775 name = NULL;
1776 else
1777 {
1778 name = bfd_elf_string_from_elf_section (input_bfd,
1779 symtab_hdr->sh_link,
1780 sym->st_name);
1781 if (name == NULL)
1782 return FALSE;
1783 if (*name == '\0')
1784 name = bfd_section_name (input_bfd, sec);
1785 }
1786 if (!(info->callbacks->reloc_overflow
1787 (info, (h ? &h->root : NULL), name, howto->name,
1788 (bfd_vma) 0, input_bfd, input_section,
1789 rel->r_offset)))
1790 return FALSE;
1791 }
1792 break;
1793 }
1794 }
1795 }
1796
1797 return TRUE;
1798 }
1799
1800 /* Finish up dynamic symbol handling. We set the contents of various
1801 dynamic sections here. */
1802
1803 static bfd_boolean
1804 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1805 struct elf_link_hash_entry *h,
1806 Elf_Internal_Sym *sym)
1807 {
1808 bfd *dynobj;
1809
1810 dynobj = elf_hash_table (info)->dynobj;
1811
1812 if (h->plt.offset != (bfd_vma) -1)
1813 {
1814 asection *splt;
1815 asection *sgot;
1816 asection *srela;
1817 bfd_vma plt_index;
1818 bfd_vma got_offset;
1819 bfd_vma addend;
1820 Elf_Internal_Rela rela;
1821 bfd_byte *loc;
1822
1823 /* This symbol has an entry in the procedure linkage table. Set
1824 it up. */
1825 BFD_ASSERT (h->dynindx != -1);
1826
1827 splt = bfd_get_linker_section (dynobj, ".plt");
1828 sgot = bfd_get_linker_section (dynobj, ".got.plt");
1829 srela = bfd_get_linker_section (dynobj, ".rela.plt");
1830 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1831
1832 addend = 2 * (h->plt.offset & 1);
1833 h->plt.offset &= ~1;
1834
1835 /* Get the index in the procedure linkage table which
1836 corresponds to this symbol. This is the index of this symbol
1837 in all the symbols for which we are making plt entries. The
1838 first entry in the procedure linkage table is reserved. */
1839 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1840
1841 /* Get the offset into the .got table of the entry that
1842 corresponds to this function. Each .got entry is 4 bytes.
1843 The first two are reserved. */
1844 got_offset = (plt_index + 3) * 4;
1845
1846 /* Fill in the entry in the procedure linkage table. */
1847 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1848 PLT_ENTRY_SIZE);
1849
1850 /* The offset is relative to the first extension word. */
1851 bfd_put_32 (output_bfd,
1852 -(h->plt.offset + 8),
1853 splt->contents + h->plt.offset + 4);
1854
1855 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1856 splt->contents + h->plt.offset + 8);
1857
1858 /* Fill in the entry in the global offset table. */
1859 bfd_put_32 (output_bfd,
1860 (splt->output_section->vma
1861 + splt->output_offset
1862 + h->plt.offset) + addend,
1863 sgot->contents + got_offset);
1864
1865 /* Fill in the entry in the .rela.plt section. */
1866 rela.r_offset = (sgot->output_section->vma
1867 + sgot->output_offset
1868 + got_offset);
1869 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1870 rela.r_addend = addend;
1871 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1872 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1873
1874 if (!h->def_regular)
1875 {
1876 /* Mark the symbol as undefined, rather than as defined in
1877 the .plt section. Leave the value alone. */
1878 sym->st_shndx = SHN_UNDEF;
1879 }
1880 }
1881
1882 if (h->got.offset != (bfd_vma) -1)
1883 {
1884 asection *sgot;
1885 asection *srela;
1886 Elf_Internal_Rela rela;
1887 bfd_byte *loc;
1888
1889 /* This symbol has an entry in the global offset table. Set it
1890 up. */
1891 sgot = bfd_get_linker_section (dynobj, ".got");
1892 srela = bfd_get_linker_section (dynobj, ".rela.got");
1893 BFD_ASSERT (sgot != NULL && srela != NULL);
1894
1895 rela.r_offset = (sgot->output_section->vma
1896 + sgot->output_offset
1897 + (h->got.offset &~ 1));
1898
1899 /* If the symbol was forced to be local because of a version file
1900 locally we just want to emit a RELATIVE reloc. The entry in
1901 the global offset table will already have been initialized in
1902 the relocate_section function. */
1903 if (info->shared
1904 && h->dynindx == -1
1905 && h->def_regular)
1906 {
1907 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1908 }
1909 else
1910 {
1911 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1912 }
1913 rela.r_addend = bfd_get_signed_32 (output_bfd,
1914 (sgot->contents
1915 + (h->got.offset & ~1)));
1916
1917 loc = srela->contents;
1918 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1919 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1920 }
1921
1922 if (h->needs_copy)
1923 {
1924 asection *s;
1925 Elf_Internal_Rela rela;
1926 bfd_byte *loc;
1927
1928 /* This symbol needs a copy reloc. Set it up. */
1929 BFD_ASSERT (h->dynindx != -1
1930 && (h->root.type == bfd_link_hash_defined
1931 || h->root.type == bfd_link_hash_defweak));
1932
1933 s = bfd_get_linker_section (dynobj, ".rela.bss");
1934 BFD_ASSERT (s != NULL);
1935
1936 rela.r_offset = (h->root.u.def.value
1937 + h->root.u.def.section->output_section->vma
1938 + h->root.u.def.section->output_offset);
1939 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1940 rela.r_addend = 0;
1941 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1942 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1943 }
1944
1945 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1946 if (h == elf_hash_table (info)->hdynamic
1947 || h == elf_hash_table (info)->hgot)
1948 sym->st_shndx = SHN_ABS;
1949
1950 return TRUE;
1951 }
1952
1953 /* Finish up the dynamic sections. */
1954
1955 static bfd_boolean
1956 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1957 {
1958 bfd *dynobj;
1959 asection *sgot;
1960 asection *sdyn;
1961
1962 dynobj = elf_hash_table (info)->dynobj;
1963
1964 sgot = bfd_get_linker_section (dynobj, ".got.plt");
1965 BFD_ASSERT (sgot != NULL);
1966 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
1967
1968 if (elf_hash_table (info)->dynamic_sections_created)
1969 {
1970 asection *splt;
1971 Elf32_External_Dyn *dyncon, *dynconend;
1972
1973 splt = bfd_get_linker_section (dynobj, ".plt");
1974 BFD_ASSERT (splt != NULL && sdyn != NULL);
1975
1976 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1977 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1978 for (; dyncon < dynconend; dyncon++)
1979 {
1980 Elf_Internal_Dyn dyn;
1981 const char *name;
1982 asection *s;
1983
1984 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1985
1986 switch (dyn.d_tag)
1987 {
1988 default:
1989 break;
1990
1991 case DT_PLTGOT:
1992 name = ".got";
1993 goto get_vma;
1994 case DT_JMPREL:
1995 name = ".rela.plt";
1996 get_vma:
1997 s = bfd_get_section_by_name (output_bfd, name);
1998 BFD_ASSERT (s != NULL);
1999 dyn.d_un.d_ptr = s->vma;
2000 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2001 break;
2002
2003 case DT_PLTRELSZ:
2004 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2005 BFD_ASSERT (s != NULL);
2006 dyn.d_un.d_val = s->size;
2007 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2008 break;
2009
2010 case DT_RELASZ:
2011 /* The procedure linkage table relocs (DT_JMPREL) should
2012 not be included in the overall relocs (DT_RELA).
2013 Therefore, we override the DT_RELASZ entry here to
2014 make it not include the JMPREL relocs. Since the
2015 linker script arranges for .rela.plt to follow all
2016 other relocation sections, we don't have to worry
2017 about changing the DT_RELA entry. */
2018 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2019 if (s != NULL)
2020 dyn.d_un.d_val -= s->size;
2021 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2022 break;
2023 }
2024 }
2025
2026 /* Fill in the first entry in the procedure linkage table. */
2027 if (splt->size > 0)
2028 {
2029 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2030 bfd_put_32 (output_bfd,
2031 (sgot->output_section->vma
2032 + sgot->output_offset + 4
2033 - (splt->output_section->vma + 6)),
2034 splt->contents + 2);
2035 bfd_put_32 (output_bfd,
2036 (sgot->output_section->vma
2037 + sgot->output_offset + 8
2038 - (splt->output_section->vma + 12)),
2039 splt->contents + 8);
2040 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2041 = PLT_ENTRY_SIZE;
2042 }
2043 }
2044
2045 /* Fill in the first three entries in the global offset table. */
2046 if (sgot->size > 0)
2047 {
2048 if (sdyn == NULL)
2049 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2050 else
2051 bfd_put_32 (output_bfd,
2052 sdyn->output_section->vma + sdyn->output_offset,
2053 sgot->contents);
2054 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2055 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2056 }
2057
2058 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2059
2060 return TRUE;
2061 }
2062
2063 static enum elf_reloc_type_class
2064 elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
2065 const asection *rel_sec ATTRIBUTE_UNUSED,
2066 const Elf_Internal_Rela *rela)
2067 {
2068 switch ((int) ELF32_R_TYPE (rela->r_info))
2069 {
2070 case R_VAX_RELATIVE:
2071 return reloc_class_relative;
2072 case R_VAX_JMP_SLOT:
2073 return reloc_class_plt;
2074 case R_VAX_COPY:
2075 return reloc_class_copy;
2076 default:
2077 return reloc_class_normal;
2078 }
2079 }
2080
2081 static bfd_vma
2082 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
2083 const arelent *rel ATTRIBUTE_UNUSED)
2084 {
2085 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
2086 }
2087
2088 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2089 #define TARGET_LITTLE_NAME "elf32-vax"
2090 #define ELF_MACHINE_CODE EM_VAX
2091 #define ELF_MAXPAGESIZE 0x1000
2092
2093 #define elf_backend_create_dynamic_sections \
2094 _bfd_elf_create_dynamic_sections
2095 #define bfd_elf32_bfd_link_hash_table_create \
2096 elf_vax_link_hash_table_create
2097 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2098
2099 #define elf_backend_check_relocs elf_vax_check_relocs
2100 #define elf_backend_adjust_dynamic_symbol \
2101 elf_vax_adjust_dynamic_symbol
2102 #define elf_backend_always_size_sections \
2103 elf_vax_always_size_sections
2104 #define elf_backend_size_dynamic_sections \
2105 elf_vax_size_dynamic_sections
2106 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2107 #define elf_backend_relocate_section elf_vax_relocate_section
2108 #define elf_backend_finish_dynamic_symbol \
2109 elf_vax_finish_dynamic_symbol
2110 #define elf_backend_finish_dynamic_sections \
2111 elf_vax_finish_dynamic_sections
2112 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2113 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2114 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2115 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2116 #define bfd_elf32_bfd_merge_private_bfd_data \
2117 elf32_vax_merge_private_bfd_data
2118 #define bfd_elf32_bfd_set_private_flags \
2119 elf32_vax_set_private_flags
2120 #define bfd_elf32_bfd_print_private_bfd_data \
2121 elf32_vax_print_private_bfd_data
2122
2123 #define elf_backend_can_gc_sections 1
2124 #define elf_backend_want_got_plt 1
2125 #define elf_backend_plt_readonly 1
2126 #define elf_backend_want_plt_sym 0
2127 #define elf_backend_got_header_size 16
2128 #define elf_backend_rela_normal 1
2129
2130 #include "elf32-target.h"
GDB Binutils - Deliverables
This page took 0.07405 seconds and 4 git commands to generate.