?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
daily update
[binutils.git] / bfd / elf32-vax.c
blobef5ceb4c501512c7c59168e039adf49b7a960e01
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 Free Software Foundation, Inc.
4 Contributed by Matt Thomas <matt@3am-software.com>.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28 #include "elf/vax.h"
29
30 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
31 static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
32 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
33 struct bfd_hash_table *,
34 const char *);
35 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
36 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
37 asection *, const Elf_Internal_Rela *);
38 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
39 struct elf_link_hash_entry *);
40 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
41 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
42 bfd *, asection *, bfd_byte *,
43 Elf_Internal_Rela *,
44 Elf_Internal_Sym *, asection **);
45 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
46 struct elf_link_hash_entry *,
47 Elf_Internal_Sym *);
48 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
49 struct bfd_link_info *);
50 static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *,
51 const arelent *);
52
53 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
54 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
55 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, PTR);
56
57 static reloc_howto_type howto_table[] = {
58 HOWTO (R_VAX_NONE, /* type */
59 0, /* rightshift */
60 0, /* size (0 = byte, 1 = short, 2 = long) */
61 0, /* bitsize */
62 FALSE, /* pc_relative */
63 0, /* bitpos */
64 complain_overflow_dont, /* complain_on_overflow */
65 bfd_elf_generic_reloc, /* special_function */
66 "R_VAX_NONE", /* name */
67 FALSE, /* partial_inplace */
68 0, /* src_mask */
69 0x00000000, /* dst_mask */
70 FALSE), /* pcrel_offset */
71
72 HOWTO (R_VAX_32, /* type */
73 0, /* rightshift */
74 2, /* size (0 = byte, 1 = short, 2 = long) */
75 32, /* bitsize */
76 FALSE, /* pc_relative */
77 0, /* bitpos */
78 complain_overflow_bitfield, /* complain_on_overflow */
79 bfd_elf_generic_reloc, /* special_function */
80 "R_VAX_32", /* name */
81 FALSE, /* partial_inplace */
82 0, /* src_mask */
83 0xffffffff, /* dst_mask */
84 FALSE), /* pcrel_offset */
85
86 HOWTO (R_VAX_16, /* type */
87 0, /* rightshift */
88 1, /* size (0 = byte, 1 = short, 2 = long) */
89 16, /* bitsize */
90 FALSE, /* pc_relative */
91 0, /* bitpos */
92 complain_overflow_bitfield, /* complain_on_overflow */
93 bfd_elf_generic_reloc, /* special_function */
94 "R_VAX_16", /* name */
95 FALSE, /* partial_inplace */
96 0, /* src_mask */
97 0x0000ffff, /* dst_mask */
98 FALSE), /* pcrel_offset */
99
100 HOWTO (R_VAX_8, /* type */
101 0, /* rightshift */
102 0, /* size (0 = byte, 1 = short, 2 = long) */
103 8, /* bitsize */
104 FALSE, /* pc_relative */
105 0, /* bitpos */
106 complain_overflow_bitfield, /* complain_on_overflow */
107 bfd_elf_generic_reloc, /* special_function */
108 "R_VAX_8", /* name */
109 FALSE, /* partial_inplace */
110 0, /* src_mask */
111 0x000000ff, /* dst_mask */
112 FALSE), /* pcrel_offset */
113
114 HOWTO (R_VAX_PC32, /* type */
115 0, /* rightshift */
116 2, /* size (0 = byte, 1 = short, 2 = long) */
117 32, /* bitsize */
118 TRUE, /* pc_relative */
119 0, /* bitpos */
120 complain_overflow_bitfield, /* complain_on_overflow */
121 bfd_elf_generic_reloc, /* special_function */
122 "R_VAX_PC32", /* name */
123 FALSE, /* partial_inplace */
124 0, /* src_mask */
125 0xffffffff, /* dst_mask */
126 TRUE), /* pcrel_offset */
127
128 HOWTO (R_VAX_PC16, /* type */
129 0, /* rightshift */
130 1, /* size (0 = byte, 1 = short, 2 = long) */
131 16, /* bitsize */
132 TRUE, /* pc_relative */
133 0, /* bitpos */
134 complain_overflow_signed, /* complain_on_overflow */
135 bfd_elf_generic_reloc, /* special_function */
136 "R_VAX_PC16", /* name */
137 FALSE, /* partial_inplace */
138 0, /* src_mask */
139 0x0000ffff, /* dst_mask */
140 TRUE), /* pcrel_offset */
141
142 HOWTO (R_VAX_PC8, /* type */
143 0, /* rightshift */
144 0, /* size (0 = byte, 1 = short, 2 = long) */
145 8, /* bitsize */
146 TRUE, /* pc_relative */
147 0, /* bitpos */
148 complain_overflow_signed, /* complain_on_overflow */
149 bfd_elf_generic_reloc, /* special_function */
150 "R_VAX_PC8", /* name */
151 FALSE, /* partial_inplace */
152 0, /* src_mask */
153 0x000000ff, /* dst_mask */
154 TRUE), /* pcrel_offset */
155
156 HOWTO (R_VAX_GOT32, /* type */
157 0, /* rightshift */
158 2, /* size (0 = byte, 1 = short, 2 = long) */
159 32, /* bitsize */
160 TRUE, /* pc_relative */
161 0, /* bitpos */
162 complain_overflow_bitfield, /* complain_on_overflow */
163 bfd_elf_generic_reloc, /* special_function */
164 "R_VAX_GOT32", /* name */
165 FALSE, /* partial_inplace */
166 0, /* src_mask */
167 0xffffffff, /* dst_mask */
168 TRUE), /* pcrel_offset */
169
170 EMPTY_HOWTO (-1),
171 EMPTY_HOWTO (-1),
172 EMPTY_HOWTO (-1),
173 EMPTY_HOWTO (-1),
174 EMPTY_HOWTO (-1),
175
176 HOWTO (R_VAX_PLT32, /* type */
177 0, /* rightshift */
178 2, /* size (0 = byte, 1 = short, 2 = long) */
179 32, /* bitsize */
180 TRUE, /* pc_relative */
181 0, /* bitpos */
182 complain_overflow_bitfield, /* complain_on_overflow */
183 bfd_elf_generic_reloc, /* special_function */
184 "R_VAX_PLT32", /* name */
185 FALSE, /* partial_inplace */
186 0, /* src_mask */
187 0xffffffff, /* dst_mask */
188 TRUE), /* pcrel_offset */
189
190 EMPTY_HOWTO (-1),
191 EMPTY_HOWTO (-1),
192 EMPTY_HOWTO (-1),
193 EMPTY_HOWTO (-1),
194 EMPTY_HOWTO (-1),
195
196 HOWTO (R_VAX_COPY, /* type */
197 0, /* rightshift */
198 0, /* size (0 = byte, 1 = short, 2 = long) */
199 0, /* bitsize */
200 FALSE, /* pc_relative */
201 0, /* bitpos */
202 complain_overflow_dont, /* complain_on_overflow */
203 bfd_elf_generic_reloc, /* special_function */
204 "R_VAX_COPY", /* name */
205 FALSE, /* partial_inplace */
206 0, /* src_mask */
207 0xffffffff, /* dst_mask */
208 FALSE), /* pcrel_offset */
209
210 HOWTO (R_VAX_GLOB_DAT, /* type */
211 0, /* rightshift */
212 2, /* size (0 = byte, 1 = short, 2 = long) */
213 32, /* bitsize */
214 FALSE, /* pc_relative */
215 0, /* bitpos */
216 complain_overflow_dont, /* complain_on_overflow */
217 bfd_elf_generic_reloc, /* special_function */
218 "R_VAX_GLOB_DAT", /* name */
219 FALSE, /* partial_inplace */
220 0, /* src_mask */
221 0xffffffff, /* dst_mask */
222 FALSE), /* pcrel_offset */
223
224 HOWTO (R_VAX_JMP_SLOT, /* type */
225 0, /* rightshift */
226 2, /* size (0 = byte, 1 = short, 2 = long) */
227 32, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_dont, /* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_VAX_JMP_SLOT", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0xffffffff, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 HOWTO (R_VAX_RELATIVE, /* type */
239 0, /* rightshift */
240 2, /* size (0 = byte, 1 = short, 2 = long) */
241 32, /* bitsize */
242 FALSE, /* pc_relative */
243 0, /* bitpos */
244 complain_overflow_dont, /* complain_on_overflow */
245 bfd_elf_generic_reloc, /* special_function */
246 "R_VAX_RELATIVE", /* name */
247 FALSE, /* partial_inplace */
248 0, /* src_mask */
249 0xffffffff, /* dst_mask */
250 FALSE), /* pcrel_offset */
251
252 /* GNU extension to record C++ vtable hierarchy */
253 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
254 0, /* rightshift */
255 2, /* size (0 = byte, 1 = short, 2 = long) */
256 0, /* bitsize */
257 FALSE, /* pc_relative */
258 0, /* bitpos */
259 complain_overflow_dont, /* complain_on_overflow */
260 NULL, /* special_function */
261 "R_VAX_GNU_VTINHERIT", /* name */
262 FALSE, /* partial_inplace */
263 0, /* src_mask */
264 0, /* dst_mask */
265 FALSE), /* pcrel_offset */
266
267 /* GNU extension to record C++ vtable member usage */
268 HOWTO (R_VAX_GNU_VTENTRY, /* type */
269 0, /* rightshift */
270 2, /* size (0 = byte, 1 = short, 2 = long) */
271 0, /* bitsize */
272 FALSE, /* pc_relative */
273 0, /* bitpos */
274 complain_overflow_dont, /* complain_on_overflow */
275 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
276 "R_VAX_GNU_VTENTRY", /* name */
277 FALSE, /* partial_inplace */
278 0, /* src_mask */
279 0, /* dst_mask */
280 FALSE), /* pcrel_offset */
281 };
282
283 static void
284 rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
285 Elf_Internal_Rela *dst)
286 {
287 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
288 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
289 }
290
291 #define elf_info_to_howto rtype_to_howto
292
293 static const struct
294 {
295 bfd_reloc_code_real_type bfd_val;
296 int elf_val;
297 } reloc_map[] = {
298 { BFD_RELOC_NONE, R_VAX_NONE },
299 { BFD_RELOC_32, R_VAX_32 },
300 { BFD_RELOC_16, R_VAX_16 },
301 { BFD_RELOC_8, R_VAX_8 },
302 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
303 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
304 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
305 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
306 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
307 { BFD_RELOC_NONE, R_VAX_COPY },
308 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
309 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
310 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
311 { BFD_RELOC_CTOR, R_VAX_32 },
312 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
313 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
314 };
315
316 static reloc_howto_type *
317 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
318 {
319 unsigned int i;
320 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
321 {
322 if (reloc_map[i].bfd_val == code)
323 return &howto_table[reloc_map[i].elf_val];
324 }
325 return 0;
326 }
327
328 static reloc_howto_type *
329 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
330 const char *r_name)
331 {
332 unsigned int i;
333
334 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
335 if (howto_table[i].name != NULL
336 && strcasecmp (howto_table[i].name, r_name) == 0)
337 return &howto_table[i];
338
339 return NULL;
340 }
341
342 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
343 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
344 #define ELF_ARCH bfd_arch_vax
345 /* end code generated by elf.el */
346 \f
347 /* Functions for the VAX ELF linker. */
348
349 /* The name of the dynamic interpreter. This is put in the .interp
350 section. */
351
352 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
353
354 /* The size in bytes of an entry in the procedure linkage table. */
355
356 #define PLT_ENTRY_SIZE 12
357
358 /* The first entry in a procedure linkage table looks like this. See
359 the SVR4 ABI VAX supplement to see how this works. */
360
361 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
362 {
363 0xdd, 0xef, /* pushl l^ */
364 0, 0, 0, 0, /* offset to .plt.got + 4 */
365 0x17, 0xff, /* jmp @L^(pc) */
366 0, 0, 0, 0, /* offset to .plt.got + 8 */
367 };
368
369 /* Subsequent entries in a procedure linkage table look like this. */
370
371 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
372 {
373 0xfc, 0x0f, /* .word ^M<r11:r2> */
374 0x16, 0xef, /* jsb L^(pc) */
375 0, 0, 0, 0, /* replaced with offset to start of .plt */
376 0, 0, 0, 0, /* index into .rela.plt */
377 };
378
379 /* The VAX linker needs to keep track of the number of relocs that it
380 decides to copy in check_relocs for each symbol. This is so that it
381 can discard PC relative relocs if it doesn't need them when linking
382 with -Bsymbolic. We store the information in a field extending the
383 regular ELF linker hash table. */
384
385 /* This structure keeps track of the number of PC relative relocs we have
386 copied for a given symbol. */
387
388 struct elf_vax_pcrel_relocs_copied
389 {
390 /* Next section. */
391 struct elf_vax_pcrel_relocs_copied *next;
392 /* A section in dynobj. */
393 asection *section;
394 /* Number of relocs copied in this section. */
395 bfd_size_type count;
396 };
397
398 /* VAX ELF linker hash entry. */
399
400 struct elf_vax_link_hash_entry
401 {
402 struct elf_link_hash_entry root;
403
404 /* Number of PC relative relocs copied for this symbol. */
405 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
406
407 bfd_vma got_addend;
408 };
409
410 /* VAX ELF linker hash table. */
411
412 struct elf_vax_link_hash_table
413 {
414 struct elf_link_hash_table root;
415 };
416
417 /* Declare this now that the above structures are defined. */
418
419 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
420 PTR);
421
422 /* Declare this now that the above structures are defined. */
423
424 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
425 PTR);
426
427 /* Traverse an VAX ELF linker hash table. */
428
429 #define elf_vax_link_hash_traverse(table, func, info) \
430 (elf_link_hash_traverse \
431 (&(table)->root, \
432 (bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \
433 (info)))
434
435 /* Get the VAX ELF linker hash table from a link_info structure. */
436
437 #define elf_vax_hash_table(p) ((struct elf_vax_link_hash_table *) (p)->hash)
438
439 /* Create an entry in an VAX ELF linker hash table. */
440
441 static struct bfd_hash_entry *
442 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
443 struct bfd_hash_table *table,
444 const char *string)
445 {
446 struct elf_vax_link_hash_entry *ret =
447 (struct elf_vax_link_hash_entry *) entry;
448
449 /* Allocate the structure if it has not already been allocated by a
450 subclass. */
451 if (ret == NULL)
452 ret = ((struct elf_vax_link_hash_entry *)
453 bfd_hash_allocate (table,
454 sizeof (struct elf_vax_link_hash_entry)));
455 if (ret == NULL)
456 return (struct bfd_hash_entry *) ret;
457
458 /* Call the allocation method of the superclass. */
459 ret = ((struct elf_vax_link_hash_entry *)
460 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
461 table, string));
462 if (ret != NULL)
463 {
464 ret->pcrel_relocs_copied = NULL;
465 }
466
467 return (struct bfd_hash_entry *) ret;
468 }
469
470 /* Create an VAX ELF linker hash table. */
471
472 static struct bfd_link_hash_table *
473 elf_vax_link_hash_table_create (bfd *abfd)
474 {
475 struct elf_vax_link_hash_table *ret;
476 bfd_size_type amt = sizeof (struct elf_vax_link_hash_table);
477
478 ret = bfd_malloc (amt);
479 if (ret == NULL)
480 return NULL;
481
482 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
483 elf_vax_link_hash_newfunc,
484 sizeof (struct elf_vax_link_hash_entry)))
485 {
486 free (ret);
487 return NULL;
488 }
489
490 return &ret->root.root;
491 }
492
493 /* Keep vax-specific flags in the ELF header */
494 static bfd_boolean
495 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
496 {
497 elf_elfheader (abfd)->e_flags = flags;
498 elf_flags_init (abfd) = TRUE;
499 return TRUE;
500 }
501
502 /* Merge backend specific data from an object file to the output
503 object file when linking. */
504 static bfd_boolean
505 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
506 {
507 flagword out_flags;
508 flagword in_flags;
509
510 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
511 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
512 return TRUE;
513
514 in_flags = elf_elfheader (ibfd)->e_flags;
515 out_flags = elf_elfheader (obfd)->e_flags;
516
517 if (!elf_flags_init (obfd))
518 {
519 elf_flags_init (obfd) = TRUE;
520 elf_elfheader (obfd)->e_flags = in_flags;
521 }
522
523 return TRUE;
524 }
525
526 /* Display the flags field */
527 static bfd_boolean
528 elf32_vax_print_private_bfd_data (bfd *abfd, PTR ptr)
529 {
530 FILE *file = (FILE *) ptr;
531
532 BFD_ASSERT (abfd != NULL && ptr != NULL);
533
534 /* Print normal ELF private data. */
535 _bfd_elf_print_private_bfd_data (abfd, ptr);
536
537 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
538
539 /* xgettext:c-format */
540 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
541
542 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
543 fprintf (file, _(" [nonpic]"));
544
545 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
546 fprintf (file, _(" [d-float]"));
547
548 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
549 fprintf (file, _(" [g-float]"));
550
551 fputc ('\n', file);
552
553 return TRUE;
554 }
555 /* Look through the relocs for a section during the first phase, and
556 allocate space in the global offset table or procedure linkage
557 table. */
558
559 static bfd_boolean
560 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
561 const Elf_Internal_Rela *relocs)
562 {
563 bfd *dynobj;
564 Elf_Internal_Shdr *symtab_hdr;
565 struct elf_link_hash_entry **sym_hashes;
566 const Elf_Internal_Rela *rel;
567 const Elf_Internal_Rela *rel_end;
568 asection *sgot;
569 asection *srelgot;
570 asection *sreloc;
571
572 if (info->relocatable)
573 return TRUE;
574
575 dynobj = elf_hash_table (info)->dynobj;
576 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
577 sym_hashes = elf_sym_hashes (abfd);
578
579 sgot = NULL;
580 srelgot = NULL;
581 sreloc = NULL;
582
583 rel_end = relocs + sec->reloc_count;
584 for (rel = relocs; rel < rel_end; rel++)
585 {
586 unsigned long r_symndx;
587 struct elf_link_hash_entry *h;
588
589 r_symndx = ELF32_R_SYM (rel->r_info);
590
591 if (r_symndx < symtab_hdr->sh_info)
592 h = NULL;
593 else
594 {
595 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
596 while (h->root.type == bfd_link_hash_indirect
597 || h->root.type == bfd_link_hash_warning)
598 h = (struct elf_link_hash_entry *) h->root.u.i.link;
599 }
600
601 switch (ELF32_R_TYPE (rel->r_info))
602 {
603 case R_VAX_GOT32:
604 BFD_ASSERT (h != NULL);
605 if (h->forced_local
606 || h == elf_hash_table (info)->hgot
607 || h == elf_hash_table (info)->hplt)
608 break;
609
610 /* If this is a local symbol, we resolve it directly without
611 creating a global offset table entry. */
612 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
613 break;
614
615 /* This symbol requires a global offset table entry. */
616
617 if (dynobj == NULL)
618 {
619 /* Create the .got section. */
620 elf_hash_table (info)->dynobj = dynobj = abfd;
621 if (!_bfd_elf_create_got_section (dynobj, info))
622 return FALSE;
623 }
624
625 if (sgot == NULL)
626 {
627 sgot = bfd_get_section_by_name (dynobj, ".got");
628 BFD_ASSERT (sgot != NULL);
629 }
630
631 if (srelgot == NULL
632 && (h != NULL || info->shared))
633 {
634 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
635 if (srelgot == NULL)
636 {
637 srelgot = bfd_make_section_with_flags (dynobj,
638 ".rela.got",
639 (SEC_ALLOC
640 | SEC_LOAD
641 | SEC_HAS_CONTENTS
642 | SEC_IN_MEMORY
643 | SEC_LINKER_CREATED
644 | SEC_READONLY));
645 if (srelgot == NULL
646 || !bfd_set_section_alignment (dynobj, srelgot, 2))
647 return FALSE;
648 }
649 }
650
651 if (h != NULL)
652 {
653 struct elf_vax_link_hash_entry *eh;
654
655 eh = (struct elf_vax_link_hash_entry *) h;
656 if (h->got.refcount == -1)
657 {
658 h->got.refcount = 1;
659 eh->got_addend = rel->r_addend;
660 }
661 else
662 {
663 h->got.refcount++;
664 if (eh->got_addend != (bfd_vma) rel->r_addend)
665 (*_bfd_error_handler)
666 (_("%s: warning: GOT addend of %ld to `%s' does"
667 " not match previous GOT addend of %ld"),
668 bfd_get_filename (abfd), rel->r_addend,
669 h->root.root.string,
670 eh->got_addend);
671
672 }
673 }
674 break;
675
676 case R_VAX_PLT32:
677 /* This symbol requires a procedure linkage table entry. We
678 actually build the entry in adjust_dynamic_symbol,
679 because this might be a case of linking PIC code which is
680 never referenced by a dynamic object, in which case we
681 don't need to generate a procedure linkage table entry
682 after all. */
683
684 /* If this is a local symbol, we resolve it directly without
685 creating a procedure linkage table entry. */
686 BFD_ASSERT (h != NULL);
687 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT || h->forced_local)
688 break;
689
690 h->needs_plt = 1;
691 if (h->plt.refcount == -1)
692 h->plt.refcount = 1;
693 else
694 h->plt.refcount++;
695 break;
696
697 case R_VAX_PC8:
698 case R_VAX_PC16:
699 case R_VAX_PC32:
700 /* If we are creating a shared library and this is not a local
701 symbol, we need to copy the reloc into the shared library.
702 However when linking with -Bsymbolic and this is a global
703 symbol which is defined in an object we are including in the
704 link (i.e., DEF_REGULAR is set), then we can resolve the
705 reloc directly. At this point we have not seen all the input
706 files, so it is possible that DEF_REGULAR is not set now but
707 will be set later (it is never cleared). We account for that
708 possibility below by storing information in the
709 pcrel_relocs_copied field of the hash table entry. */
710 if (!(info->shared
711 && (sec->flags & SEC_ALLOC) != 0
712 && h != NULL
713 && (!info->symbolic
714 || !h->def_regular)))
715 {
716 if (h != NULL
717 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
718 && !h->forced_local)
719 {
720 /* Make sure a plt entry is created for this symbol if
721 it turns out to be a function defined by a dynamic
722 object. */
723 if (h->plt.refcount == -1)
724 h->plt.refcount = 1;
725 else
726 h->plt.refcount++;
727 }
728 break;
729 }
730 /* If this is a local symbol, we can resolve it directly. */
731 if (h != NULL
732 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
733 || h->forced_local))
734 break;
735
736 /* Fall through. */
737 case R_VAX_8:
738 case R_VAX_16:
739 case R_VAX_32:
740 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
741 {
742 /* Make sure a plt entry is created for this symbol if it
743 turns out to be a function defined by a dynamic object. */
744 if (h->plt.refcount == -1)
745 h->plt.refcount = 1;
746 else
747 h->plt.refcount++;
748 }
749
750 /* If we are creating a shared library, we need to copy the
751 reloc into the shared library. */
752 if (info->shared
753 && (sec->flags & SEC_ALLOC) != 0)
754 {
755 /* When creating a shared object, we must copy these
756 reloc types into the output file. We create a reloc
757 section in dynobj and make room for this reloc. */
758 if (sreloc == NULL)
759 {
760 sreloc = _bfd_elf_make_dynamic_reloc_section
761 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
762
763 if (sreloc == NULL)
764 return FALSE;
765
766 if (sec->flags & SEC_READONLY)
767 info->flags |= DF_TEXTREL;
768 }
769
770 sreloc->size += sizeof (Elf32_External_Rela);
771
772 /* If we are linking with -Bsymbolic, we count the number of
773 PC relative relocations we have entered for this symbol,
774 so that we can discard them again if the symbol is later
775 defined by a regular object. Note that this function is
776 only called if we are using a vaxelf linker hash table,
777 which means that h is really a pointer to an
778 elf_vax_link_hash_entry. */
779 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
780 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
781 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
782 && info->symbolic)
783 {
784 struct elf_vax_link_hash_entry *eh;
785 struct elf_vax_pcrel_relocs_copied *p;
786
787 eh = (struct elf_vax_link_hash_entry *) h;
788
789 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
790 if (p->section == sreloc)
791 break;
792
793 if (p == NULL)
794 {
795 p = ((struct elf_vax_pcrel_relocs_copied *)
796 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
797 if (p == NULL)
798 return FALSE;
799 p->next = eh->pcrel_relocs_copied;
800 eh->pcrel_relocs_copied = p;
801 p->section = sreloc;
802 p->count = 0;
803 }
804
805 ++p->count;
806 }
807 }
808
809 break;
810
811 /* This relocation describes the C++ object vtable hierarchy.
812 Reconstruct it for later use during GC. */
813 case R_VAX_GNU_VTINHERIT:
814 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
815 return FALSE;
816 break;
817
818 /* This relocation describes which C++ vtable entries are actually
819 used. Record for later use during GC. */
820 case R_VAX_GNU_VTENTRY:
821 BFD_ASSERT (h != NULL);
822 if (h != NULL
823 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
824 return FALSE;
825 break;
826
827 default:
828 break;
829 }
830 }
831
832 return TRUE;
833 }
834
835 /* Return the section that should be marked against GC for a given
836 relocation. */
837
838 static asection *
839 elf_vax_gc_mark_hook (asection *sec,
840 struct bfd_link_info *info,
841 Elf_Internal_Rela *rel,
842 struct elf_link_hash_entry *h,
843 Elf_Internal_Sym *sym)
844 {
845 if (h != NULL)
846 switch (ELF32_R_TYPE (rel->r_info))
847 {
848 case R_VAX_GNU_VTINHERIT:
849 case R_VAX_GNU_VTENTRY:
850 return NULL;
851 }
852
853 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
854 }
855
856 /* Update the got entry reference counts for the section being removed. */
857
858 static bfd_boolean
859 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
860 const Elf_Internal_Rela *relocs)
861 {
862 Elf_Internal_Shdr *symtab_hdr;
863 struct elf_link_hash_entry **sym_hashes;
864 const Elf_Internal_Rela *rel, *relend;
865 bfd *dynobj;
866
867 if (info->relocatable)
868 return TRUE;
869
870 dynobj = elf_hash_table (info)->dynobj;
871 if (dynobj == NULL)
872 return TRUE;
873
874 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
875 sym_hashes = elf_sym_hashes (abfd);
876
877 relend = relocs + sec->reloc_count;
878 for (rel = relocs; rel < relend; rel++)
879 {
880 unsigned long r_symndx;
881 struct elf_link_hash_entry *h = NULL;
882
883 r_symndx = ELF32_R_SYM (rel->r_info);
884 if (r_symndx >= symtab_hdr->sh_info)
885 {
886 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
887 while (h->root.type == bfd_link_hash_indirect
888 || h->root.type == bfd_link_hash_warning)
889 h = (struct elf_link_hash_entry *) h->root.u.i.link;
890 }
891
892 switch (ELF32_R_TYPE (rel->r_info))
893 {
894 case R_VAX_GOT32:
895 if (h != NULL && h->got.refcount > 0)
896 --h->got.refcount;
897 break;
898
899 case R_VAX_PLT32:
900 case R_VAX_PC8:
901 case R_VAX_PC16:
902 case R_VAX_PC32:
903 case R_VAX_8:
904 case R_VAX_16:
905 case R_VAX_32:
906 if (h != NULL && h->plt.refcount > 0)
907 --h->plt.refcount;
908 break;
909
910 default:
911 break;
912 }
913 }
914
915 return TRUE;
916 }
917
918 /* Adjust a symbol defined by a dynamic object and referenced by a
919 regular object. The current definition is in some section of the
920 dynamic object, but we're not including those sections. We have to
921 change the definition to something the rest of the link can
922 understand. */
923
924 static bfd_boolean
925 elf_vax_adjust_dynamic_symbol (info, h)
926 struct bfd_link_info *info;
927 struct elf_link_hash_entry *h;
928 {
929 bfd *dynobj;
930 asection *s;
931
932 dynobj = elf_hash_table (info)->dynobj;
933
934 /* Make sure we know what is going on here. */
935 BFD_ASSERT (dynobj != NULL
936 && (h->needs_plt
937 || h->u.weakdef != NULL
938 || (h->def_dynamic
939 && h->ref_regular
940 && !h->def_regular)));
941
942 /* If this is a function, put it in the procedure linkage table. We
943 will fill in the contents of the procedure linkage table later,
944 when we know the address of the .got section. */
945 if (h->type == STT_FUNC
946 || h->needs_plt)
947 {
948 if (! info->shared
949 && !h->def_dynamic
950 && !h->ref_dynamic
951 /* We must always create the plt entry if it was referenced
952 by a PLTxxO relocation. In this case we already recorded
953 it as a dynamic symbol. */
954 && h->dynindx == -1)
955 {
956 /* This case can occur if we saw a PLTxx reloc in an input
957 file, but the symbol was never referred to by a dynamic
958 object. In such a case, we don't actually need to build
959 a procedure linkage table, and we can just do a PCxx
960 reloc instead. */
961 BFD_ASSERT (h->needs_plt);
962 h->plt.offset = (bfd_vma) -1;
963 return TRUE;
964 }
965
966 /* GC may have rendered this entry unused. */
967 if (h->plt.refcount <= 0)
968 {
969 h->needs_plt = 0;
970 h->plt.offset = (bfd_vma) -1;
971 return TRUE;
972 }
973
974 /* Make sure this symbol is output as a dynamic symbol. */
975 if (h->dynindx == -1)
976 {
977 if (! bfd_elf_link_record_dynamic_symbol (info, h))
978 return FALSE;
979 }
980
981 s = bfd_get_section_by_name (dynobj, ".plt");
982 BFD_ASSERT (s != NULL);
983
984 /* If this is the first .plt entry, make room for the special
985 first entry. */
986 if (s->size == 0)
987 {
988 s->size += PLT_ENTRY_SIZE;
989 }
990
991 /* If this symbol is not defined in a regular file, and we are
992 not generating a shared library, then set the symbol to this
993 location in the .plt. This is required to make function
994 pointers compare as equal between the normal executable and
995 the shared library. */
996 if (!info->shared
997 && !h->def_regular)
998 {
999 h->root.u.def.section = s;
1000 h->root.u.def.value = s->size;
1001 }
1002
1003 h->plt.offset = s->size;
1004
1005 /* Make room for this entry. */
1006 s->size += PLT_ENTRY_SIZE;
1007
1008 /* We also need to make an entry in the .got.plt section, which
1009 will be placed in the .got section by the linker script. */
1010
1011 s = bfd_get_section_by_name (dynobj, ".got.plt");
1012 BFD_ASSERT (s != NULL);
1013 s->size += 4;
1014
1015 /* We also need to make an entry in the .rela.plt section. */
1016
1017 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1018 BFD_ASSERT (s != NULL);
1019 s->size += sizeof (Elf32_External_Rela);
1020
1021 return TRUE;
1022 }
1023
1024 /* Reinitialize the plt offset now that it is not used as a reference
1025 count any more. */
1026 h->plt.offset = (bfd_vma) -1;
1027
1028 /* If this is a weak symbol, and there is a real definition, the
1029 processor independent code will have arranged for us to see the
1030 real definition first, and we can just use the same value. */
1031 if (h->u.weakdef != NULL)
1032 {
1033 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1034 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1035 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1036 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1037 return TRUE;
1038 }
1039
1040 /* This is a reference to a symbol defined by a dynamic object which
1041 is not a function. */
1042
1043 /* If we are creating a shared library, we must presume that the
1044 only references to the symbol are via the global offset table.
1045 For such cases we need not do anything here; the relocations will
1046 be handled correctly by relocate_section. */
1047 if (info->shared)
1048 return TRUE;
1049
1050 if (h->size == 0)
1051 {
1052 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1053 h->root.root.string);
1054 return TRUE;
1055 }
1056
1057 /* We must allocate the symbol in our .dynbss section, which will
1058 become part of the .bss section of the executable. There will be
1059 an entry for this symbol in the .dynsym section. The dynamic
1060 object will contain position independent code, so all references
1061 from the dynamic object to this symbol will go through the global
1062 offset table. The dynamic linker will use the .dynsym entry to
1063 determine the address it must put in the global offset table, so
1064 both the dynamic object and the regular object will refer to the
1065 same memory location for the variable. */
1066
1067 s = bfd_get_section_by_name (dynobj, ".dynbss");
1068 BFD_ASSERT (s != NULL);
1069
1070 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1071 copy the initial value out of the dynamic object and into the
1072 runtime process image. We need to remember the offset into the
1073 .rela.bss section we are going to use. */
1074 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1075 {
1076 asection *srel;
1077
1078 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1079 BFD_ASSERT (srel != NULL);
1080 srel->size += sizeof (Elf32_External_Rela);
1081 h->needs_copy = 1;
1082 }
1083
1084 return _bfd_elf_adjust_dynamic_copy (h, s);
1085 }
1086
1087 /* Set the sizes of the dynamic sections. */
1088
1089 static bfd_boolean
1090 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1091 {
1092 bfd *dynobj;
1093 asection *s;
1094 bfd_boolean plt;
1095 bfd_boolean relocs;
1096 bfd_boolean reltext;
1097
1098 dynobj = elf_hash_table (info)->dynobj;
1099 BFD_ASSERT (dynobj != NULL);
1100
1101 if (elf_hash_table (info)->dynamic_sections_created)
1102 {
1103 /* Set the contents of the .interp section to the interpreter. */
1104 if (info->executable)
1105 {
1106 s = bfd_get_section_by_name (dynobj, ".interp");
1107 BFD_ASSERT (s != NULL);
1108 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1109 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1110 }
1111 }
1112 else
1113 {
1114 /* We may have created entries in the .rela.got and .got sections.
1115 However, if we are not creating the dynamic sections, we will
1116 not actually use these entries. Reset the size of .rela.got
1117 and .got, which will cause it to get stripped from the output
1118 file below. */
1119 s = bfd_get_section_by_name (dynobj, ".rela.got");
1120 if (s != NULL)
1121 s->size = 0;
1122 s = bfd_get_section_by_name (dynobj, ".got.plt");
1123 if (s != NULL)
1124 s->size = 0;
1125 s = bfd_get_section_by_name (dynobj, ".got");
1126 if (s != NULL)
1127 s->size = 0;
1128 }
1129
1130 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1131 relative relocs against symbols defined in a regular object. We
1132 allocated space for them in the check_relocs routine, but we will not
1133 fill them in in the relocate_section routine. */
1134 if (info->shared && info->symbolic)
1135 elf_vax_link_hash_traverse (elf_vax_hash_table (info),
1136 elf_vax_discard_copies,
1137 NULL);
1138
1139 /* If this is a -Bsymbolic shared link or a static link, we need to
1140 discard all the got entries we've recorded. Otherwise, we need to
1141 instantiate (allocate space for them). */
1142 elf_link_hash_traverse (elf_hash_table (info),
1143 elf_vax_instantiate_got_entries,
1144 (PTR) info);
1145
1146 /* The check_relocs and adjust_dynamic_symbol entry points have
1147 determined the sizes of the various dynamic sections. Allocate
1148 memory for them. */
1149 plt = FALSE;
1150 relocs = FALSE;
1151 reltext = FALSE;
1152 for (s = dynobj->sections; s != NULL; s = s->next)
1153 {
1154 const char *name;
1155
1156 if ((s->flags & SEC_LINKER_CREATED) == 0)
1157 continue;
1158
1159 /* It's OK to base decisions on the section name, because none
1160 of the dynobj section names depend upon the input files. */
1161 name = bfd_get_section_name (dynobj, s);
1162
1163 if (strcmp (name, ".plt") == 0)
1164 {
1165 /* Remember whether there is a PLT. */
1166 plt = s->size != 0;
1167 }
1168 else if (CONST_STRNEQ (name, ".rela"))
1169 {
1170 if (s->size != 0)
1171 {
1172 asection *target;
1173
1174 /* Remember whether there are any reloc sections other
1175 than .rela.plt. */
1176 if (strcmp (name, ".rela.plt") != 0)
1177 {
1178 const char *outname;
1179
1180 relocs = TRUE;
1181
1182 /* If this relocation section applies to a read only
1183 section, then we probably need a DT_TEXTREL
1184 entry. .rela.plt is actually associated with
1185 .got.plt, which is never readonly. */
1186 outname = bfd_get_section_name (output_bfd,
1187 s->output_section);
1188 target = bfd_get_section_by_name (output_bfd, outname + 5);
1189 if (target != NULL
1190 && (target->flags & SEC_READONLY) != 0
1191 && (target->flags & SEC_ALLOC) != 0)
1192 reltext = TRUE;
1193 }
1194
1195 /* We use the reloc_count field as a counter if we need
1196 to copy relocs into the output file. */
1197 s->reloc_count = 0;
1198 }
1199 }
1200 else if (! CONST_STRNEQ (name, ".got")
1201 && strcmp (name, ".dynbss") != 0)
1202 {
1203 /* It's not one of our sections, so don't allocate space. */
1204 continue;
1205 }
1206
1207 if (s->size == 0)
1208 {
1209 /* If we don't need this section, strip it from the
1210 output file. This is mostly to handle .rela.bss and
1211 .rela.plt. We must create both sections in
1212 create_dynamic_sections, because they must be created
1213 before the linker maps input sections to output
1214 sections. The linker does that before
1215 adjust_dynamic_symbol is called, and it is that
1216 function which decides whether anything needs to go
1217 into these sections. */
1218 s->flags |= SEC_EXCLUDE;
1219 continue;
1220 }
1221
1222 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1223 continue;
1224
1225 /* Allocate memory for the section contents. */
1226 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1227 if (s->contents == NULL)
1228 return FALSE;
1229 }
1230
1231 if (elf_hash_table (info)->dynamic_sections_created)
1232 {
1233 /* Add some entries to the .dynamic section. We fill in the
1234 values later, in elf_vax_finish_dynamic_sections, but we
1235 must add the entries now so that we get the correct size for
1236 the .dynamic section. The DT_DEBUG entry is filled in by the
1237 dynamic linker and used by the debugger. */
1238 #define add_dynamic_entry(TAG, VAL) \
1239 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1240
1241 if (!info->shared)
1242 {
1243 if (!add_dynamic_entry (DT_DEBUG, 0))
1244 return FALSE;
1245 }
1246
1247 if (plt)
1248 {
1249 if (!add_dynamic_entry (DT_PLTGOT, 0)
1250 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1251 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1252 || !add_dynamic_entry (DT_JMPREL, 0))
1253 return FALSE;
1254 }
1255
1256 if (relocs)
1257 {
1258 if (!add_dynamic_entry (DT_RELA, 0)
1259 || !add_dynamic_entry (DT_RELASZ, 0)
1260 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1261 return FALSE;
1262 }
1263
1264 if (reltext || (info->flags & DF_TEXTREL) != 0)
1265 {
1266 if (!add_dynamic_entry (DT_TEXTREL, 0))
1267 return FALSE;
1268 }
1269 }
1270 #undef add_dynamic_entry
1271
1272 return TRUE;
1273 }
1274
1275 /* This function is called via elf_vax_link_hash_traverse if we are
1276 creating a shared object with -Bsymbolic. It discards the space
1277 allocated to copy PC relative relocs against symbols which are defined
1278 in regular objects. We allocated space for them in the check_relocs
1279 routine, but we won't fill them in in the relocate_section routine. */
1280
1281 static bfd_boolean
1282 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1283 PTR ignore ATTRIBUTE_UNUSED)
1284 {
1285 struct elf_vax_pcrel_relocs_copied *s;
1286
1287 if (h->root.root.type == bfd_link_hash_warning)
1288 h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
1289
1290 /* We only discard relocs for symbols defined in a regular object. */
1291 if (!h->root.def_regular)
1292 return TRUE;
1293
1294 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1295 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1296
1297 return TRUE;
1298 }
1299
1300 /* This function is called via elf_link_hash_traverse. It looks for entries
1301 that have GOT or PLT (.GOT) references. If creating a static object or a
1302 shared object with -Bsymbolic, it resets the reference count back to 0
1303 and sets the offset to -1 so normal PC32 relocation will be done. If
1304 creating a shared object or executable, space in the .got and .rela.got
1305 will be reserved for the symbol. */
1306
1307 static bfd_boolean
1308 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, PTR infoptr)
1309 {
1310 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1311 bfd *dynobj;
1312 asection *sgot;
1313 asection *srelgot;
1314
1315 /* We don't care about non-GOT (and non-PLT) entries. */
1316 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1317 return TRUE;
1318
1319 dynobj = elf_hash_table (info)->dynobj;
1320 if (dynobj == NULL)
1321 return TRUE;
1322
1323 sgot = bfd_get_section_by_name (dynobj, ".got");
1324 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1325
1326 if (!elf_hash_table (info)->dynamic_sections_created
1327 || (info->shared && info->symbolic)
1328 || h->forced_local)
1329 {
1330 h->got.refcount = 0;
1331 h->got.offset = (bfd_vma) -1;
1332 h->plt.refcount = 0;
1333 h->plt.offset = (bfd_vma) -1;
1334 }
1335 else if (h->got.refcount > 0)
1336 {
1337 bfd_boolean dyn;
1338
1339 /* Make sure this symbol is output as a dynamic symbol. */
1340 if (h->dynindx == -1)
1341 {
1342 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1343 return FALSE;
1344 }
1345
1346 dyn = elf_hash_table (info)->dynamic_sections_created;
1347 /* Allocate space in the .got and .rela.got sections. */
1348 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1349 && (info->shared
1350 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1351 {
1352 sgot->size += 4;
1353 srelgot->size += sizeof (Elf32_External_Rela);
1354 }
1355 }
1356
1357 return TRUE;
1358 }
1359
1360 /* Relocate an VAX ELF section. */
1361
1362 static bfd_boolean
1363 elf_vax_relocate_section (bfd *output_bfd,
1364 struct bfd_link_info *info,
1365 bfd *input_bfd,
1366 asection *input_section,
1367 bfd_byte *contents,
1368 Elf_Internal_Rela *relocs,
1369 Elf_Internal_Sym *local_syms,
1370 asection **local_sections)
1371 {
1372 bfd *dynobj;
1373 Elf_Internal_Shdr *symtab_hdr;
1374 struct elf_link_hash_entry **sym_hashes;
1375 bfd_vma *local_got_offsets;
1376 bfd_vma plt_index;
1377 bfd_vma got_offset;
1378 asection *sgot;
1379 asection *splt;
1380 asection *sgotplt;
1381 asection *sreloc;
1382 Elf_Internal_Rela *rel;
1383 Elf_Internal_Rela *relend;
1384
1385 dynobj = elf_hash_table (info)->dynobj;
1386 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1387 sym_hashes = elf_sym_hashes (input_bfd);
1388 local_got_offsets = elf_local_got_offsets (input_bfd);
1389
1390 sgot = NULL;
1391 splt = NULL;
1392 sgotplt = NULL;
1393 sreloc = NULL;
1394
1395 rel = relocs;
1396 relend = relocs + input_section->reloc_count;
1397 for (; rel < relend; rel++)
1398 {
1399 int r_type;
1400 reloc_howto_type *howto;
1401 unsigned long r_symndx;
1402 struct elf_link_hash_entry *h;
1403 Elf_Internal_Sym *sym;
1404 asection *sec;
1405 bfd_vma relocation;
1406 bfd_reloc_status_type r;
1407
1408 r_type = ELF32_R_TYPE (rel->r_info);
1409 if (r_type < 0 || r_type >= (int) R_VAX_max)
1410 {
1411 bfd_set_error (bfd_error_bad_value);
1412 return FALSE;
1413 }
1414 howto = howto_table + r_type;
1415
1416 r_symndx = ELF32_R_SYM (rel->r_info);
1417 h = NULL;
1418 sym = NULL;
1419 sec = NULL;
1420 if (r_symndx < symtab_hdr->sh_info)
1421 {
1422 sym = local_syms + r_symndx;
1423 sec = local_sections[r_symndx];
1424 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1425 }
1426 else
1427 {
1428 bfd_boolean unresolved_reloc;
1429 bfd_boolean warned;
1430
1431 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1432 r_symndx, symtab_hdr, sym_hashes,
1433 h, sec, relocation,
1434 unresolved_reloc, warned);
1435
1436 if ((h->root.type == bfd_link_hash_defined
1437 || h->root.type == bfd_link_hash_defweak)
1438 && ((r_type == R_VAX_PLT32
1439 && h->plt.offset != (bfd_vma) -1
1440 && !h->forced_local
1441 && elf_hash_table (info)->dynamic_sections_created)
1442 || (r_type == R_VAX_GOT32
1443 && h->got.offset != (bfd_vma) -1
1444 && !h->forced_local
1445 && elf_hash_table (info)->dynamic_sections_created
1446 && (! info->shared
1447 || (! info->symbolic && h->dynindx != -1)
1448 || !h->def_regular))
1449 || (info->shared
1450 && ((! info->symbolic && h->dynindx != -1)
1451 || !h->def_regular)
1452 && ((input_section->flags & SEC_ALLOC) != 0
1453 /* DWARF will emit R_VAX_32 relocations in its
1454 sections against symbols defined externally
1455 in shared libraries. We can't do anything
1456 with them here. */
1457
1458 || ((input_section->flags & SEC_DEBUGGING) != 0
1459 && h->def_dynamic))
1460 && (r_type == R_VAX_8
1461 || r_type == R_VAX_16
1462 || r_type == R_VAX_32))))
1463 /* In these cases, we don't need the relocation
1464 value. We check specially because in some
1465 obscure cases sec->output_section will be NULL. */
1466 relocation = 0;
1467 }
1468
1469 if (sec != NULL && elf_discarded_section (sec))
1470 {
1471 /* For relocs against symbols from removed linkonce sections,
1472 or sections discarded by a linker script, we just want the
1473 section contents zeroed. Avoid any special processing. */
1474 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1475 rel->r_info = 0;
1476 rel->r_addend = 0;
1477 continue;
1478 }
1479
1480 if (info->relocatable)
1481 continue;
1482
1483 switch (r_type)
1484 {
1485 case R_VAX_GOT32:
1486 /* Relocation is to the address of the entry for this symbol
1487 in the global offset table. */
1488 if (h == NULL
1489 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1490 || h->got.offset == (bfd_vma) -1
1491 || h->forced_local)
1492 break;
1493
1494 /* Relocation is the offset of the entry for this symbol in
1495 the global offset table. */
1496
1497 {
1498 bfd_boolean dyn;
1499 bfd_vma off;
1500
1501 if (sgot == NULL)
1502 {
1503 sgot = bfd_get_section_by_name (dynobj, ".got");
1504 BFD_ASSERT (sgot != NULL);
1505 }
1506
1507 BFD_ASSERT (h != NULL);
1508 off = h->got.offset;
1509 BFD_ASSERT (off != (bfd_vma) -1);
1510 BFD_ASSERT (off < sgot->size);
1511
1512 dyn = elf_hash_table (info)->dynamic_sections_created;
1513 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1514 || (info->shared
1515 && SYMBOL_REFERENCES_LOCAL (info, h)))
1516 {
1517 /* The symbol was forced to be local
1518 because of a version file.. We must initialize
1519 this entry in the global offset table. Since
1520 the offset must always be a multiple of 4, we
1521 use the least significant bit to record whether
1522 we have initialized it already.
1523
1524 When doing a dynamic link, we create a .rela.got
1525 relocation entry to initialize the value. This
1526 is done in the finish_dynamic_symbol routine. */
1527 if ((off & 1) != 0)
1528 off &= ~1;
1529 else
1530 {
1531 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1532 sgot->contents + off);
1533 h->got.offset |= 1;
1534 }
1535 } else {
1536 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1537 }
1538
1539 relocation = sgot->output_offset + off;
1540 /* The GOT relocation uses the addend. */
1541 rel->r_addend = 0;
1542
1543 /* Change the reference to be indirect. */
1544 contents[rel->r_offset - 1] |= 0x10;
1545 relocation += sgot->output_section->vma;
1546 }
1547 break;
1548
1549 case R_VAX_PC32:
1550 /* If we are creating an executable and the function this
1551 reloc refers to is in a shared lib, then we made a PLT
1552 entry for this symbol and need to handle the reloc like
1553 a PLT reloc. */
1554 if (info->shared)
1555 goto r_vax_pc32_shared;
1556 /* Fall through. */
1557 case R_VAX_PLT32:
1558 /* Relocation is to the entry for this symbol in the
1559 procedure linkage table. */
1560
1561 /* Resolve a PLTxx reloc against a local symbol directly,
1562 without using the procedure linkage table. */
1563 if (h == NULL
1564 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1565 || h->forced_local)
1566 break;
1567
1568 if (h->plt.offset == (bfd_vma) -1
1569 || !elf_hash_table (info)->dynamic_sections_created)
1570 {
1571 /* We didn't make a PLT entry for this symbol. This
1572 happens when statically linking PIC code, or when
1573 using -Bsymbolic. */
1574 break;
1575 }
1576
1577 if (splt == NULL)
1578 {
1579 splt = bfd_get_section_by_name (dynobj, ".plt");
1580 BFD_ASSERT (splt != NULL);
1581 }
1582
1583 if (sgotplt == NULL)
1584 {
1585 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1586 BFD_ASSERT (splt != NULL);
1587 }
1588
1589 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1590
1591 /* Get the offset into the .got table of the entry that
1592 corresponds to this function. Each .got entry is 4 bytes.
1593 The first two are reserved. */
1594 got_offset = (plt_index + 3) * 4;
1595
1596 /* We want the relocate to point into the .got.plt instead
1597 of the plt itself. */
1598 relocation = (sgotplt->output_section->vma
1599 + sgotplt->output_offset
1600 + got_offset);
1601 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1602 if (rel->r_addend == 2)
1603 {
1604 h->plt.offset |= 1;
1605 }
1606 else if (rel->r_addend != 0)
1607 (*_bfd_error_handler)
1608 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1609 bfd_get_filename (input_bfd), rel->r_addend,
1610 h->root.root.string,
1611 bfd_get_section_name (input_bfd, input_section));
1612 rel->r_addend = 0;
1613
1614 break;
1615
1616 case R_VAX_PC8:
1617 case R_VAX_PC16:
1618 r_vax_pc32_shared:
1619 if (h == NULL
1620 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1621 || h->forced_local)
1622 break;
1623 /* Fall through. */
1624 case R_VAX_8:
1625 case R_VAX_16:
1626 case R_VAX_32:
1627 if (info->shared
1628 && r_symndx != 0
1629 && (input_section->flags & SEC_ALLOC) != 0
1630 && ((r_type != R_VAX_PC8
1631 && r_type != R_VAX_PC16
1632 && r_type != R_VAX_PC32)
1633 || ((input_section->flags & SEC_CODE)
1634 && (!info->symbolic
1635 || (!h->def_regular && h->type != STT_SECTION)))))
1636 {
1637 Elf_Internal_Rela outrel;
1638 bfd_byte *loc;
1639 bfd_boolean skip, relocate;
1640
1641 /* When generating a shared object, these relocations
1642 are copied into the output file to be resolved at run
1643 time. */
1644 if (sreloc == NULL)
1645 {
1646 sreloc = _bfd_elf_get_dynamic_reloc_section
1647 (input_bfd, input_section, /*rela?*/ TRUE);
1648 if (sreloc == NULL)
1649 return FALSE;
1650 }
1651
1652 skip = FALSE;
1653 relocate = FALSE;
1654
1655 outrel.r_offset =
1656 _bfd_elf_section_offset (output_bfd, info, input_section,
1657 rel->r_offset);
1658 if (outrel.r_offset == (bfd_vma) -1)
1659 skip = TRUE;
1660 if (outrel.r_offset == (bfd_vma) -2)
1661 skip = TRUE, relocate = TRUE;
1662 outrel.r_offset += (input_section->output_section->vma
1663 + input_section->output_offset);
1664
1665 if (skip)
1666 memset (&outrel, 0, sizeof outrel);
1667 /* h->dynindx may be -1 if the symbol was marked to
1668 become local. */
1669 else if (h != NULL
1670 && ((! info->symbolic && h->dynindx != -1)
1671 || !h->def_regular))
1672 {
1673 BFD_ASSERT (h->dynindx != -1);
1674 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1675 outrel.r_addend = relocation + rel->r_addend;
1676 }
1677 else
1678 {
1679 if (r_type == R_VAX_32)
1680 {
1681 relocate = TRUE;
1682 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1683 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1684 &contents[rel->r_offset]) == 0);
1685 outrel.r_addend = relocation + rel->r_addend;
1686 }
1687 else
1688 {
1689 long indx;
1690
1691 if (bfd_is_abs_section (sec))
1692 indx = 0;
1693 else if (sec == NULL || sec->owner == NULL)
1694 {
1695 bfd_set_error (bfd_error_bad_value);
1696 return FALSE;
1697 }
1698 else
1699 {
1700 asection *osec;
1701
1702 /* We are turning this relocation into one
1703 against a section symbol. It would be
1704 proper to subtract the symbol's value,
1705 osec->vma, from the emitted reloc addend,
1706 but ld.so expects buggy relocs. */
1707 osec = sec->output_section;
1708 indx = elf_section_data (osec)->dynindx;
1709 if (indx == 0)
1710 {
1711 struct elf_link_hash_table *htab;
1712 htab = elf_hash_table (info);
1713 osec = htab->text_index_section;
1714 indx = elf_section_data (osec)->dynindx;
1715 }
1716 BFD_ASSERT (indx != 0);
1717 }
1718
1719 outrel.r_info = ELF32_R_INFO (indx, r_type);
1720 outrel.r_addend = relocation + rel->r_addend;
1721 }
1722 }
1723
1724 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1725 ".text") != 0 ||
1726 (info->shared
1727 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1728 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1729 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1730 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1731 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1732 {
1733 if (h != NULL)
1734 (*_bfd_error_handler)
1735 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1736 bfd_get_filename (input_bfd), howto->name,
1737 h->root.root.string,
1738 bfd_get_section_name (input_bfd, input_section));
1739 else
1740 (*_bfd_error_handler)
1741 (_("%s: warning: %s relocation to 0x%x from %s section"),
1742 bfd_get_filename (input_bfd), howto->name,
1743 outrel.r_addend,
1744 bfd_get_section_name (input_bfd, input_section));
1745 }
1746 loc = sreloc->contents;
1747 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1748 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1749
1750 /* This reloc will be computed at runtime, so there's no
1751 need to do anything now, except for R_VAX_32
1752 relocations that have been turned into
1753 R_VAX_RELATIVE. */
1754 if (!relocate)
1755 continue;
1756 }
1757
1758 break;
1759
1760 case R_VAX_GNU_VTINHERIT:
1761 case R_VAX_GNU_VTENTRY:
1762 /* These are no-ops in the end. */
1763 continue;
1764
1765 default:
1766 break;
1767 }
1768
1769 /* VAX PCREL relocations are from the end of relocation, not the start.
1770 So subtract the difference from the relocation amount since we can't
1771 add it to the offset. */
1772 if (howto->pc_relative && howto->pcrel_offset)
1773 relocation -= bfd_get_reloc_size(howto);
1774
1775 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1776 contents, rel->r_offset,
1777 relocation, rel->r_addend);
1778
1779 if (r != bfd_reloc_ok)
1780 {
1781 switch (r)
1782 {
1783 default:
1784 case bfd_reloc_outofrange:
1785 abort ();
1786 case bfd_reloc_overflow:
1787 {
1788 const char *name;
1789
1790 if (h != NULL)
1791 name = NULL;
1792 else
1793 {
1794 name = bfd_elf_string_from_elf_section (input_bfd,
1795 symtab_hdr->sh_link,
1796 sym->st_name);
1797 if (name == NULL)
1798 return FALSE;
1799 if (*name == '\0')
1800 name = bfd_section_name (input_bfd, sec);
1801 }
1802 if (!(info->callbacks->reloc_overflow
1803 (info, (h ? &h->root : NULL), name, howto->name,
1804 (bfd_vma) 0, input_bfd, input_section,
1805 rel->r_offset)))
1806 return FALSE;
1807 }
1808 break;
1809 }
1810 }
1811 }
1812
1813 return TRUE;
1814 }
1815
1816 /* Finish up dynamic symbol handling. We set the contents of various
1817 dynamic sections here. */
1818
1819 static bfd_boolean
1820 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1821 struct elf_link_hash_entry *h,
1822 Elf_Internal_Sym *sym)
1823 {
1824 bfd *dynobj;
1825
1826 dynobj = elf_hash_table (info)->dynobj;
1827
1828 if (h->plt.offset != (bfd_vma) -1)
1829 {
1830 asection *splt;
1831 asection *sgot;
1832 asection *srela;
1833 bfd_vma plt_index;
1834 bfd_vma got_offset;
1835 bfd_vma addend;
1836 Elf_Internal_Rela rela;
1837 bfd_byte *loc;
1838
1839 /* This symbol has an entry in the procedure linkage table. Set
1840 it up. */
1841 BFD_ASSERT (h->dynindx != -1);
1842
1843 splt = bfd_get_section_by_name (dynobj, ".plt");
1844 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1845 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1846 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1847
1848 addend = 2 * (h->plt.offset & 1);
1849 h->plt.offset &= ~1;
1850
1851 /* Get the index in the procedure linkage table which
1852 corresponds to this symbol. This is the index of this symbol
1853 in all the symbols for which we are making plt entries. The
1854 first entry in the procedure linkage table is reserved. */
1855 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1856
1857 /* Get the offset into the .got table of the entry that
1858 corresponds to this function. Each .got entry is 4 bytes.
1859 The first two are reserved. */
1860 got_offset = (plt_index + 3) * 4;
1861
1862 /* Fill in the entry in the procedure linkage table. */
1863 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1864 PLT_ENTRY_SIZE);
1865
1866 /* The offset is relative to the first extension word. */
1867 bfd_put_32 (output_bfd,
1868 -(h->plt.offset + 8),
1869 splt->contents + h->plt.offset + 4);
1870
1871 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1872 splt->contents + h->plt.offset + 8);
1873
1874 /* Fill in the entry in the global offset table. */
1875 bfd_put_32 (output_bfd,
1876 (splt->output_section->vma
1877 + splt->output_offset
1878 + h->plt.offset) + addend,
1879 sgot->contents + got_offset);
1880
1881 /* Fill in the entry in the .rela.plt section. */
1882 rela.r_offset = (sgot->output_section->vma
1883 + sgot->output_offset
1884 + got_offset);
1885 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1886 rela.r_addend = addend;
1887 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1888 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1889
1890 if (!h->def_regular)
1891 {
1892 /* Mark the symbol as undefined, rather than as defined in
1893 the .plt section. Leave the value alone. */
1894 sym->st_shndx = SHN_UNDEF;
1895 }
1896 }
1897
1898 if (h->got.offset != (bfd_vma) -1)
1899 {
1900 asection *sgot;
1901 asection *srela;
1902 Elf_Internal_Rela rela;
1903 bfd_byte *loc;
1904
1905 /* This symbol has an entry in the global offset table. Set it
1906 up. */
1907 sgot = bfd_get_section_by_name (dynobj, ".got");
1908 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1909 BFD_ASSERT (sgot != NULL && srela != NULL);
1910
1911 rela.r_offset = (sgot->output_section->vma
1912 + sgot->output_offset
1913 + (h->got.offset &~ 1));
1914
1915 /* If the symbol was forced to be local because of a version file
1916 locally we just want to emit a RELATIVE reloc. The entry in
1917 the global offset table will already have been initialized in
1918 the relocate_section function. */
1919 if (info->shared
1920 && h->dynindx == -1
1921 && h->def_regular)
1922 {
1923 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1924 }
1925 else
1926 {
1927 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1928 }
1929 rela.r_addend = bfd_get_signed_32 (output_bfd,
1930 (sgot->contents
1931 + (h->got.offset & ~1)));
1932
1933 loc = srela->contents;
1934 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1935 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1936 }
1937
1938 if (h->needs_copy)
1939 {
1940 asection *s;
1941 Elf_Internal_Rela rela;
1942 bfd_byte *loc;
1943
1944 /* This symbol needs a copy reloc. Set it up. */
1945 BFD_ASSERT (h->dynindx != -1
1946 && (h->root.type == bfd_link_hash_defined
1947 || h->root.type == bfd_link_hash_defweak));
1948
1949 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1950 ".rela.bss");
1951 BFD_ASSERT (s != NULL);
1952
1953 rela.r_offset = (h->root.u.def.value
1954 + h->root.u.def.section->output_section->vma
1955 + h->root.u.def.section->output_offset);
1956 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1957 rela.r_addend = 0;
1958 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1959 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1960 }
1961
1962 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1963 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1964 || h == elf_hash_table (info)->hgot)
1965 sym->st_shndx = SHN_ABS;
1966
1967 return TRUE;
1968 }
1969
1970 /* Finish up the dynamic sections. */
1971
1972 static bfd_boolean
1973 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1974 {
1975 bfd *dynobj;
1976 asection *sgot;
1977 asection *sdyn;
1978
1979 dynobj = elf_hash_table (info)->dynobj;
1980
1981 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1982 BFD_ASSERT (sgot != NULL);
1983 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1984
1985 if (elf_hash_table (info)->dynamic_sections_created)
1986 {
1987 asection *splt;
1988 Elf32_External_Dyn *dyncon, *dynconend;
1989
1990 splt = bfd_get_section_by_name (dynobj, ".plt");
1991 BFD_ASSERT (splt != NULL && sdyn != NULL);
1992
1993 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1994 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1995 for (; dyncon < dynconend; dyncon++)
1996 {
1997 Elf_Internal_Dyn dyn;
1998 const char *name;
1999 asection *s;
2000
2001 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2002
2003 switch (dyn.d_tag)
2004 {
2005 default:
2006 break;
2007
2008 case DT_PLTGOT:
2009 name = ".got";
2010 goto get_vma;
2011 case DT_JMPREL:
2012 name = ".rela.plt";
2013 get_vma:
2014 s = bfd_get_section_by_name (output_bfd, name);
2015 BFD_ASSERT (s != NULL);
2016 dyn.d_un.d_ptr = s->vma;
2017 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2018 break;
2019
2020 case DT_PLTRELSZ:
2021 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2022 BFD_ASSERT (s != NULL);
2023 dyn.d_un.d_val = s->size;
2024 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2025 break;
2026
2027 case DT_RELASZ:
2028 /* The procedure linkage table relocs (DT_JMPREL) should
2029 not be included in the overall relocs (DT_RELA).
2030 Therefore, we override the DT_RELASZ entry here to
2031 make it not include the JMPREL relocs. Since the
2032 linker script arranges for .rela.plt to follow all
2033 other relocation sections, we don't have to worry
2034 about changing the DT_RELA entry. */
2035 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2036 if (s != NULL)
2037 dyn.d_un.d_val -= s->size;
2038 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2039 break;
2040 }
2041 }
2042
2043 /* Fill in the first entry in the procedure linkage table. */
2044 if (splt->size > 0)
2045 {
2046 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2047 bfd_put_32 (output_bfd,
2048 (sgot->output_section->vma
2049 + sgot->output_offset + 4
2050 - (splt->output_section->vma + 6)),
2051 splt->contents + 2);
2052 bfd_put_32 (output_bfd,
2053 (sgot->output_section->vma
2054 + sgot->output_offset + 8
2055 - (splt->output_section->vma + 12)),
2056 splt->contents + 8);
2057 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2058 = PLT_ENTRY_SIZE;
2059 }
2060 }
2061
2062 /* Fill in the first three entries in the global offset table. */
2063 if (sgot->size > 0)
2064 {
2065 if (sdyn == NULL)
2066 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2067 else
2068 bfd_put_32 (output_bfd,
2069 sdyn->output_section->vma + sdyn->output_offset,
2070 sgot->contents);
2071 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2072 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2073 }
2074
2075 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2076
2077 return TRUE;
2078 }
2079
2080 static enum elf_reloc_type_class
2081 elf_vax_reloc_type_class (const Elf_Internal_Rela *rela)
2082 {
2083 switch ((int) ELF32_R_TYPE (rela->r_info))
2084 {
2085 case R_VAX_RELATIVE:
2086 return reloc_class_relative;
2087 case R_VAX_JMP_SLOT:
2088 return reloc_class_plt;
2089 case R_VAX_COPY:
2090 return reloc_class_copy;
2091 default:
2092 return reloc_class_normal;
2093 }
2094 }
2095
2096 static bfd_vma
2097 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
2098 const arelent *rel ATTRIBUTE_UNUSED)
2099 {
2100 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
2101 }
2102
2103 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2104 #define TARGET_LITTLE_NAME "elf32-vax"
2105 #define ELF_MACHINE_CODE EM_VAX
2106 #define ELF_MAXPAGESIZE 0x1000
2107
2108 #define elf_backend_create_dynamic_sections \
2109 _bfd_elf_create_dynamic_sections
2110 #define bfd_elf32_bfd_link_hash_table_create \
2111 elf_vax_link_hash_table_create
2112 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2113
2114 #define elf_backend_check_relocs elf_vax_check_relocs
2115 #define elf_backend_adjust_dynamic_symbol \
2116 elf_vax_adjust_dynamic_symbol
2117 #define elf_backend_size_dynamic_sections \
2118 elf_vax_size_dynamic_sections
2119 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2120 #define elf_backend_relocate_section elf_vax_relocate_section
2121 #define elf_backend_finish_dynamic_symbol \
2122 elf_vax_finish_dynamic_symbol
2123 #define elf_backend_finish_dynamic_sections \
2124 elf_vax_finish_dynamic_sections
2125 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2126 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2127 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2128 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2129 #define bfd_elf32_bfd_merge_private_bfd_data \
2130 elf32_vax_merge_private_bfd_data
2131 #define bfd_elf32_bfd_set_private_flags \
2132 elf32_vax_set_private_flags
2133 #define bfd_elf32_bfd_print_private_bfd_data \
2134 elf32_vax_print_private_bfd_data
2135
2136 #define elf_backend_can_gc_sections 1
2137 #define elf_backend_want_got_plt 1
2138 #define elf_backend_plt_readonly 1
2139 #define elf_backend_want_plt_sym 0
2140 #define elf_backend_got_header_size 16
2141 #define elf_backend_rela_normal 1
2142
2143 #include "elf32-target.h"
git-cvsimport of binutils cvsroot