?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ld/
[binutils.git] / bfd / elf32-vax.c
blobfce01e21579a0120061d685e00729104104ae844
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 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 2 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, MA 02110-1301, USA. */
21
22 #include "bfd.h"
23 #include "sysdep.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/vax.h"
28
29 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
30 static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
31 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
32 struct bfd_hash_table *,
33 const char *);
34 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
35 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
36 asection *, const Elf_Internal_Rela *);
37 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
38 struct elf_link_hash_entry *);
39 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
40 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
41 bfd *, asection *, bfd_byte *,
42 Elf_Internal_Rela *,
43 Elf_Internal_Sym *, asection **);
44 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
45 struct elf_link_hash_entry *,
46 Elf_Internal_Sym *);
47 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
48 struct bfd_link_info *);
49
50 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
51 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
52 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, PTR);
53
54 static reloc_howto_type howto_table[] = {
55 HOWTO (R_VAX_NONE, /* type */
56 0, /* rightshift */
57 0, /* size (0 = byte, 1 = short, 2 = long) */
58 0, /* bitsize */
59 FALSE, /* pc_relative */
60 0, /* bitpos */
61 complain_overflow_dont, /* complain_on_overflow */
62 bfd_elf_generic_reloc, /* special_function */
63 "R_VAX_NONE", /* name */
64 FALSE, /* partial_inplace */
65 0, /* src_mask */
66 0x00000000, /* dst_mask */
67 FALSE), /* pcrel_offset */
68
69 HOWTO (R_VAX_32, /* type */
70 0, /* rightshift */
71 2, /* size (0 = byte, 1 = short, 2 = long) */
72 32, /* bitsize */
73 FALSE, /* pc_relative */
74 0, /* bitpos */
75 complain_overflow_bitfield, /* complain_on_overflow */
76 bfd_elf_generic_reloc, /* special_function */
77 "R_VAX_32", /* name */
78 FALSE, /* partial_inplace */
79 0, /* src_mask */
80 0xffffffff, /* dst_mask */
81 FALSE), /* pcrel_offset */
82
83 HOWTO (R_VAX_16, /* type */
84 0, /* rightshift */
85 1, /* size (0 = byte, 1 = short, 2 = long) */
86 16, /* bitsize */
87 FALSE, /* pc_relative */
88 0, /* bitpos */
89 complain_overflow_bitfield, /* complain_on_overflow */
90 bfd_elf_generic_reloc, /* special_function */
91 "R_VAX_16", /* name */
92 FALSE, /* partial_inplace */
93 0, /* src_mask */
94 0x0000ffff, /* dst_mask */
95 FALSE), /* pcrel_offset */
96
97 HOWTO (R_VAX_8, /* type */
98 0, /* rightshift */
99 0, /* size (0 = byte, 1 = short, 2 = long) */
100 8, /* bitsize */
101 FALSE, /* pc_relative */
102 0, /* bitpos */
103 complain_overflow_bitfield, /* complain_on_overflow */
104 bfd_elf_generic_reloc, /* special_function */
105 "R_VAX_8", /* name */
106 FALSE, /* partial_inplace */
107 0, /* src_mask */
108 0x000000ff, /* dst_mask */
109 FALSE), /* pcrel_offset */
110
111 HOWTO (R_VAX_PC32, /* type */
112 0, /* rightshift */
113 2, /* size (0 = byte, 1 = short, 2 = long) */
114 32, /* bitsize */
115 TRUE, /* pc_relative */
116 0, /* bitpos */
117 complain_overflow_bitfield, /* complain_on_overflow */
118 bfd_elf_generic_reloc, /* special_function */
119 "R_VAX_PC32", /* name */
120 FALSE, /* partial_inplace */
121 0, /* src_mask */
122 0xffffffff, /* dst_mask */
123 TRUE), /* pcrel_offset */
124
125 HOWTO (R_VAX_PC16, /* type */
126 0, /* rightshift */
127 1, /* size (0 = byte, 1 = short, 2 = long) */
128 16, /* bitsize */
129 TRUE, /* pc_relative */
130 0, /* bitpos */
131 complain_overflow_signed, /* complain_on_overflow */
132 bfd_elf_generic_reloc, /* special_function */
133 "R_VAX_PC16", /* name */
134 FALSE, /* partial_inplace */
135 0, /* src_mask */
136 0x0000ffff, /* dst_mask */
137 TRUE), /* pcrel_offset */
138
139 HOWTO (R_VAX_PC8, /* type */
140 0, /* rightshift */
141 0, /* size (0 = byte, 1 = short, 2 = long) */
142 8, /* bitsize */
143 TRUE, /* pc_relative */
144 0, /* bitpos */
145 complain_overflow_signed, /* complain_on_overflow */
146 bfd_elf_generic_reloc, /* special_function */
147 "R_VAX_PC8", /* name */
148 FALSE, /* partial_inplace */
149 0, /* src_mask */
150 0x000000ff, /* dst_mask */
151 TRUE), /* pcrel_offset */
152
153 HOWTO (R_VAX_GOT32, /* type */
154 0, /* rightshift */
155 2, /* size (0 = byte, 1 = short, 2 = long) */
156 32, /* bitsize */
157 TRUE, /* pc_relative */
158 0, /* bitpos */
159 complain_overflow_bitfield, /* complain_on_overflow */
160 bfd_elf_generic_reloc, /* special_function */
161 "R_VAX_GOT32", /* name */
162 FALSE, /* partial_inplace */
163 0, /* src_mask */
164 0xffffffff, /* dst_mask */
165 TRUE), /* pcrel_offset */
166
167 EMPTY_HOWTO (-1),
168 EMPTY_HOWTO (-1),
169 EMPTY_HOWTO (-1),
170 EMPTY_HOWTO (-1),
171 EMPTY_HOWTO (-1),
172
173 HOWTO (R_VAX_PLT32, /* type */
174 0, /* rightshift */
175 2, /* size (0 = byte, 1 = short, 2 = long) */
176 32, /* bitsize */
177 TRUE, /* pc_relative */
178 0, /* bitpos */
179 complain_overflow_bitfield, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_VAX_PLT32", /* name */
182 FALSE, /* partial_inplace */
183 0, /* src_mask */
184 0xffffffff, /* dst_mask */
185 TRUE), /* pcrel_offset */
186
187 EMPTY_HOWTO (-1),
188 EMPTY_HOWTO (-1),
189 EMPTY_HOWTO (-1),
190 EMPTY_HOWTO (-1),
191 EMPTY_HOWTO (-1),
192
193 HOWTO (R_VAX_COPY, /* type */
194 0, /* rightshift */
195 0, /* size (0 = byte, 1 = short, 2 = long) */
196 0, /* bitsize */
197 FALSE, /* pc_relative */
198 0, /* bitpos */
199 complain_overflow_dont, /* complain_on_overflow */
200 bfd_elf_generic_reloc, /* special_function */
201 "R_VAX_COPY", /* name */
202 FALSE, /* partial_inplace */
203 0, /* src_mask */
204 0xffffffff, /* dst_mask */
205 FALSE), /* pcrel_offset */
206
207 HOWTO (R_VAX_GLOB_DAT, /* type */
208 0, /* rightshift */
209 2, /* size (0 = byte, 1 = short, 2 = long) */
210 32, /* bitsize */
211 FALSE, /* pc_relative */
212 0, /* bitpos */
213 complain_overflow_dont, /* complain_on_overflow */
214 bfd_elf_generic_reloc, /* special_function */
215 "R_VAX_GLOB_DAT", /* name */
216 FALSE, /* partial_inplace */
217 0, /* src_mask */
218 0xffffffff, /* dst_mask */
219 FALSE), /* pcrel_offset */
220
221 HOWTO (R_VAX_JMP_SLOT, /* type */
222 0, /* rightshift */
223 2, /* size (0 = byte, 1 = short, 2 = long) */
224 32, /* bitsize */
225 FALSE, /* pc_relative */
226 0, /* bitpos */
227 complain_overflow_dont, /* complain_on_overflow */
228 bfd_elf_generic_reloc, /* special_function */
229 "R_VAX_JMP_SLOT", /* name */
230 FALSE, /* partial_inplace */
231 0, /* src_mask */
232 0xffffffff, /* dst_mask */
233 FALSE), /* pcrel_offset */
234
235 HOWTO (R_VAX_RELATIVE, /* type */
236 0, /* rightshift */
237 2, /* size (0 = byte, 1 = short, 2 = long) */
238 32, /* bitsize */
239 FALSE, /* pc_relative */
240 0, /* bitpos */
241 complain_overflow_dont, /* complain_on_overflow */
242 bfd_elf_generic_reloc, /* special_function */
243 "R_VAX_RELATIVE", /* name */
244 FALSE, /* partial_inplace */
245 0, /* src_mask */
246 0xffffffff, /* dst_mask */
247 FALSE), /* pcrel_offset */
248
249 /* GNU extension to record C++ vtable hierarchy */
250 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
251 0, /* rightshift */
252 2, /* size (0 = byte, 1 = short, 2 = long) */
253 0, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_dont, /* complain_on_overflow */
257 NULL, /* special_function */
258 "R_VAX_GNU_VTINHERIT", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* GNU extension to record C++ vtable member usage */
265 HOWTO (R_VAX_GNU_VTENTRY, /* type */
266 0, /* rightshift */
267 2, /* size (0 = byte, 1 = short, 2 = long) */
268 0, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_dont, /* complain_on_overflow */
272 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
273 "R_VAX_GNU_VTENTRY", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0, /* dst_mask */
277 FALSE), /* pcrel_offset */
278 };
279
280 static void
281 rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
282 Elf_Internal_Rela *dst)
283 {
284 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
285 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
286 }
287
288 #define elf_info_to_howto rtype_to_howto
289
290 static const struct
291 {
292 bfd_reloc_code_real_type bfd_val;
293 int elf_val;
294 } reloc_map[] = {
295 { BFD_RELOC_NONE, R_VAX_NONE },
296 { BFD_RELOC_32, R_VAX_32 },
297 { BFD_RELOC_16, R_VAX_16 },
298 { BFD_RELOC_8, R_VAX_8 },
299 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
300 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
301 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
302 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
303 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
304 { BFD_RELOC_NONE, R_VAX_COPY },
305 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
306 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
307 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
308 { BFD_RELOC_CTOR, R_VAX_32 },
309 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
310 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
311 };
312
313 static reloc_howto_type *
314 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
315 {
316 unsigned int i;
317 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
318 {
319 if (reloc_map[i].bfd_val == code)
320 return &howto_table[reloc_map[i].elf_val];
321 }
322 return 0;
323 }
324
325 static reloc_howto_type *
326 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
327 const char *r_name)
328 {
329 unsigned int i;
330
331 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
332 if (howto_table[i].name != NULL
333 && strcasecmp (howto_table[i].name, r_name) == 0)
334 return &howto_table[i];
335
336 return NULL;
337 }
338
339 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
340 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
341 #define ELF_ARCH bfd_arch_vax
342 /* end code generated by elf.el */
343 \f
344 /* Functions for the VAX ELF linker. */
345
346 /* The name of the dynamic interpreter. This is put in the .interp
347 section. */
348
349 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
350
351 /* The size in bytes of an entry in the procedure linkage table. */
352
353 #define PLT_ENTRY_SIZE 12
354
355 /* The first entry in a procedure linkage table looks like this. See
356 the SVR4 ABI VAX supplement to see how this works. */
357
358 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
359 {
360 0xdd, 0xef, /* pushl l^ */
361 0, 0, 0, 0, /* offset to .plt.got + 4 */
362 0x17, 0xff, /* jmp @L^(pc) */
363 0, 0, 0, 0, /* offset to .plt.got + 8 */
364 };
365
366 /* Subsequent entries in a procedure linkage table look like this. */
367
368 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
369 {
370 0x40, 0x00, /* .word ^M<r6> */
371 0x16, 0xef, /* jsb L^(pc) */
372 0, 0, 0, 0, /* replaced with offset to start of .plt */
373 0, 0, 0, 0, /* index into .rela.plt */
374 };
375
376 /* The VAX linker needs to keep track of the number of relocs that it
377 decides to copy in check_relocs for each symbol. This is so that it
378 can discard PC relative relocs if it doesn't need them when linking
379 with -Bsymbolic. We store the information in a field extending the
380 regular ELF linker hash table. */
381
382 /* This structure keeps track of the number of PC relative relocs we have
383 copied for a given symbol. */
384
385 struct elf_vax_pcrel_relocs_copied
386 {
387 /* Next section. */
388 struct elf_vax_pcrel_relocs_copied *next;
389 /* A section in dynobj. */
390 asection *section;
391 /* Number of relocs copied in this section. */
392 bfd_size_type count;
393 };
394
395 /* VAX ELF linker hash entry. */
396
397 struct elf_vax_link_hash_entry
398 {
399 struct elf_link_hash_entry root;
400
401 /* Number of PC relative relocs copied for this symbol. */
402 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
403
404 bfd_vma got_addend;
405 };
406
407 /* VAX ELF linker hash table. */
408
409 struct elf_vax_link_hash_table
410 {
411 struct elf_link_hash_table root;
412 };
413
414 /* Declare this now that the above structures are defined. */
415
416 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
417 PTR);
418
419 /* Declare this now that the above structures are defined. */
420
421 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
422 PTR);
423
424 /* Traverse an VAX ELF linker hash table. */
425
426 #define elf_vax_link_hash_traverse(table, func, info) \
427 (elf_link_hash_traverse \
428 (&(table)->root, \
429 (bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \
430 (info)))
431
432 /* Get the VAX ELF linker hash table from a link_info structure. */
433
434 #define elf_vax_hash_table(p) ((struct elf_vax_link_hash_table *) (p)->hash)
435
436 /* Create an entry in an VAX ELF linker hash table. */
437
438 static struct bfd_hash_entry *
439 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
440 struct bfd_hash_table *table,
441 const char *string)
442 {
443 struct elf_vax_link_hash_entry *ret =
444 (struct elf_vax_link_hash_entry *) entry;
445
446 /* Allocate the structure if it has not already been allocated by a
447 subclass. */
448 if (ret == NULL)
449 ret = ((struct elf_vax_link_hash_entry *)
450 bfd_hash_allocate (table,
451 sizeof (struct elf_vax_link_hash_entry)));
452 if (ret == NULL)
453 return (struct bfd_hash_entry *) ret;
454
455 /* Call the allocation method of the superclass. */
456 ret = ((struct elf_vax_link_hash_entry *)
457 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
458 table, string));
459 if (ret != NULL)
460 {
461 ret->pcrel_relocs_copied = NULL;
462 }
463
464 return (struct bfd_hash_entry *) ret;
465 }
466
467 /* Create an VAX ELF linker hash table. */
468
469 static struct bfd_link_hash_table *
470 elf_vax_link_hash_table_create (bfd *abfd)
471 {
472 struct elf_vax_link_hash_table *ret;
473 bfd_size_type amt = sizeof (struct elf_vax_link_hash_table);
474
475 ret = bfd_malloc (amt);
476 if (ret == NULL)
477 return NULL;
478
479 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
480 elf_vax_link_hash_newfunc,
481 sizeof (struct elf_vax_link_hash_entry)))
482 {
483 free (ret);
484 return NULL;
485 }
486
487 return &ret->root.root;
488 }
489
490 /* Keep vax-specific flags in the ELF header */
491 static bfd_boolean
492 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
493 {
494 elf_elfheader (abfd)->e_flags = flags;
495 elf_flags_init (abfd) = TRUE;
496 return TRUE;
497 }
498
499 /* Merge backend specific data from an object file to the output
500 object file when linking. */
501 static bfd_boolean
502 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
503 {
504 flagword out_flags;
505 flagword in_flags;
506
507 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
508 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
509 return TRUE;
510
511 in_flags = elf_elfheader (ibfd)->e_flags;
512 out_flags = elf_elfheader (obfd)->e_flags;
513
514 if (!elf_flags_init (obfd))
515 {
516 elf_flags_init (obfd) = TRUE;
517 elf_elfheader (obfd)->e_flags = in_flags;
518 }
519
520 return TRUE;
521 }
522
523 /* Display the flags field */
524 static bfd_boolean
525 elf32_vax_print_private_bfd_data (bfd *abfd, PTR ptr)
526 {
527 FILE *file = (FILE *) ptr;
528
529 BFD_ASSERT (abfd != NULL && ptr != NULL);
530
531 /* Print normal ELF private data. */
532 _bfd_elf_print_private_bfd_data (abfd, ptr);
533
534 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
535
536 /* xgettext:c-format */
537 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
538
539 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
540 fprintf (file, _(" [nonpic]"));
541
542 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
543 fprintf (file, _(" [d-float]"));
544
545 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
546 fprintf (file, _(" [g-float]"));
547
548 fputc ('\n', file);
549
550 return TRUE;
551 }
552 /* Look through the relocs for a section during the first phase, and
553 allocate space in the global offset table or procedure linkage
554 table. */
555
556 static bfd_boolean
557 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
558 const Elf_Internal_Rela *relocs)
559 {
560 bfd *dynobj;
561 Elf_Internal_Shdr *symtab_hdr;
562 struct elf_link_hash_entry **sym_hashes;
563 const Elf_Internal_Rela *rel;
564 const Elf_Internal_Rela *rel_end;
565 asection *sgot;
566 asection *srelgot;
567 asection *sreloc;
568
569 if (info->relocatable)
570 return TRUE;
571
572 dynobj = elf_hash_table (info)->dynobj;
573 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
574 sym_hashes = elf_sym_hashes (abfd);
575
576 sgot = NULL;
577 srelgot = NULL;
578 sreloc = NULL;
579
580 rel_end = relocs + sec->reloc_count;
581 for (rel = relocs; rel < rel_end; rel++)
582 {
583 unsigned long r_symndx;
584 struct elf_link_hash_entry *h;
585
586 r_symndx = ELF32_R_SYM (rel->r_info);
587
588 if (r_symndx < symtab_hdr->sh_info)
589 h = NULL;
590 else
591 {
592 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
593 while (h->root.type == bfd_link_hash_indirect
594 || h->root.type == bfd_link_hash_warning)
595 h = (struct elf_link_hash_entry *) h->root.u.i.link;
596 }
597
598 switch (ELF32_R_TYPE (rel->r_info))
599 {
600 case R_VAX_GOT32:
601 if (h != NULL
602 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
603 break;
604
605 /* This symbol requires a global offset table entry. */
606
607 if (dynobj == NULL)
608 {
609 /* Create the .got section. */
610 elf_hash_table (info)->dynobj = dynobj = abfd;
611 if (!_bfd_elf_create_got_section (dynobj, info))
612 return FALSE;
613 }
614
615 if (sgot == NULL)
616 {
617 sgot = bfd_get_section_by_name (dynobj, ".got");
618 BFD_ASSERT (sgot != NULL);
619 }
620
621 if (srelgot == NULL
622 && (h != NULL || info->shared))
623 {
624 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
625 if (srelgot == NULL)
626 {
627 srelgot = bfd_make_section_with_flags (dynobj,
628 ".rela.got",
629 (SEC_ALLOC
630 | SEC_LOAD
631 | SEC_HAS_CONTENTS
632 | SEC_IN_MEMORY
633 | SEC_LINKER_CREATED
634 | SEC_READONLY));
635 if (srelgot == NULL
636 || !bfd_set_section_alignment (dynobj, srelgot, 2))
637 return FALSE;
638 }
639 }
640
641 if (h != NULL)
642 {
643 struct elf_vax_link_hash_entry *eh;
644
645 eh = (struct elf_vax_link_hash_entry *) h;
646 if (h->got.refcount == -1)
647 {
648 h->got.refcount = 1;
649 eh->got_addend = rel->r_addend;
650 }
651 else
652 {
653 h->got.refcount++;
654 if (eh->got_addend != (bfd_vma) rel->r_addend)
655 (*_bfd_error_handler)
656 (_("%s: warning: GOT addend of %ld to `%s' does not match previous GOT addend of %ld"),
657 bfd_get_filename (abfd), rel->r_addend,
658 h->root.root.string,
659 eh->got_addend);
660
661 }
662 }
663 break;
664
665 case R_VAX_PLT32:
666 /* This symbol requires a procedure linkage table entry. We
667 actually build the entry in adjust_dynamic_symbol,
668 because this might be a case of linking PIC code which is
669 never referenced by a dynamic object, in which case we
670 don't need to generate a procedure linkage table entry
671 after all. */
672
673 /* If this is a local symbol, we resolve it directly without
674 creating a procedure linkage table entry. */
675 if (h == NULL)
676 continue;
677
678 h->needs_plt = 1;
679 if (h->plt.refcount == -1)
680 h->plt.refcount = 1;
681 else
682 h->plt.refcount++;
683 break;
684
685 case R_VAX_PC8:
686 case R_VAX_PC16:
687 case R_VAX_PC32:
688 /* If we are creating a shared library and this is not a local
689 symbol, we need to copy the reloc into the shared library.
690 However when linking with -Bsymbolic and this is a global
691 symbol which is defined in an object we are including in the
692 link (i.e., DEF_REGULAR is set), then we can resolve the
693 reloc directly. At this point we have not seen all the input
694 files, so it is possible that DEF_REGULAR is not set now but
695 will be set later (it is never cleared). We account for that
696 possibility below by storing information in the
697 pcrel_relocs_copied field of the hash table entry. */
698 if (!(info->shared
699 && (sec->flags & SEC_ALLOC) != 0
700 && h != NULL
701 && (!info->symbolic
702 || !h->def_regular)))
703 {
704 if (h != NULL)
705 {
706 /* Make sure a plt entry is created for this symbol if
707 it turns out to be a function defined by a dynamic
708 object. */
709 if (h->plt.refcount == -1)
710 h->plt.refcount = 1;
711 else
712 h->plt.refcount++;
713 }
714 break;
715 }
716 /* Fall through. */
717 case R_VAX_8:
718 case R_VAX_16:
719 case R_VAX_32:
720 if (h != NULL)
721 {
722 /* Make sure a plt entry is created for this symbol if it
723 turns out to be a function defined by a dynamic object. */
724 if (h->plt.refcount == -1)
725 h->plt.refcount = 1;
726 else
727 h->plt.refcount++;
728 }
729
730 /* If we are creating a shared library, we need to copy the
731 reloc into the shared library. */
732 if (info->shared
733 && (sec->flags & SEC_ALLOC) != 0)
734 {
735 /* When creating a shared object, we must copy these
736 reloc types into the output file. We create a reloc
737 section in dynobj and make room for this reloc. */
738 if (sreloc == NULL)
739 {
740 const char *name;
741
742 name = (bfd_elf_string_from_elf_section
743 (abfd,
744 elf_elfheader (abfd)->e_shstrndx,
745 elf_section_data (sec)->rel_hdr.sh_name));
746 if (name == NULL)
747 return FALSE;
748
749 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
750 && strcmp (bfd_get_section_name (abfd, sec),
751 name + 5) == 0);
752
753 sreloc = bfd_get_section_by_name (dynobj, name);
754 if (sreloc == NULL)
755 {
756 sreloc = bfd_make_section_with_flags (dynobj,
757 name,
758 (SEC_ALLOC
759 | SEC_LOAD
760 | SEC_HAS_CONTENTS
761 | SEC_IN_MEMORY
762 | SEC_LINKER_CREATED
763 | SEC_READONLY));
764 if (sreloc == NULL
765 || !bfd_set_section_alignment (dynobj, sreloc, 2))
766 return FALSE;
767 }
768 if (sec->flags & SEC_READONLY)
769 info->flags |= DF_TEXTREL;
770 }
771
772 sreloc->size += sizeof (Elf32_External_Rela);
773
774 /* If we are linking with -Bsymbolic, we count the number of
775 PC relative relocations we have entered for this symbol,
776 so that we can discard them again if the symbol is later
777 defined by a regular object. Note that this function is
778 only called if we are using a vaxelf linker hash table,
779 which means that h is really a pointer to an
780 elf_vax_link_hash_entry. */
781 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
782 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
783 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
784 && info->symbolic)
785 {
786 struct elf_vax_link_hash_entry *eh;
787 struct elf_vax_pcrel_relocs_copied *p;
788
789 eh = (struct elf_vax_link_hash_entry *) h;
790
791 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
792 if (p->section == sreloc)
793 break;
794
795 if (p == NULL)
796 {
797 p = ((struct elf_vax_pcrel_relocs_copied *)
798 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
799 if (p == NULL)
800 return FALSE;
801 p->next = eh->pcrel_relocs_copied;
802 eh->pcrel_relocs_copied = p;
803 p->section = sreloc;
804 p->count = 0;
805 }
806
807 ++p->count;
808 }
809 }
810
811 break;
812
813 /* This relocation describes the C++ object vtable hierarchy.
814 Reconstruct it for later use during GC. */
815 case R_VAX_GNU_VTINHERIT:
816 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
817 return FALSE;
818 break;
819
820 /* This relocation describes which C++ vtable entries are actually
821 used. Record for later use during GC. */
822 case R_VAX_GNU_VTENTRY:
823 if (!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 dynobj = elf_hash_table (info)->dynobj;
868 if (dynobj == NULL)
869 return TRUE;
870
871 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
872 sym_hashes = elf_sym_hashes (abfd);
873
874 relend = relocs + sec->reloc_count;
875 for (rel = relocs; rel < relend; rel++)
876 {
877 unsigned long r_symndx;
878 struct elf_link_hash_entry *h = NULL;
879
880 r_symndx = ELF32_R_SYM (rel->r_info);
881 if (r_symndx >= symtab_hdr->sh_info)
882 {
883 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
884 while (h->root.type == bfd_link_hash_indirect
885 || h->root.type == bfd_link_hash_warning)
886 h = (struct elf_link_hash_entry *) h->root.u.i.link;
887 }
888
889 switch (ELF32_R_TYPE (rel->r_info))
890 {
891 case R_VAX_GOT32:
892 if (h != NULL && h->got.refcount > 0)
893 --h->got.refcount;
894 break;
895
896 case R_VAX_PLT32:
897 case R_VAX_PC8:
898 case R_VAX_PC16:
899 case R_VAX_PC32:
900 case R_VAX_8:
901 case R_VAX_16:
902 case R_VAX_32:
903 if (h != NULL && h->plt.refcount > 0)
904 --h->plt.refcount;
905 break;
906
907 default:
908 break;
909 }
910 }
911
912 return TRUE;
913 }
914
915 /* Adjust a symbol defined by a dynamic object and referenced by a
916 regular object. The current definition is in some section of the
917 dynamic object, but we're not including those sections. We have to
918 change the definition to something the rest of the link can
919 understand. */
920
921 static bfd_boolean
922 elf_vax_adjust_dynamic_symbol (info, h)
923 struct bfd_link_info *info;
924 struct elf_link_hash_entry *h;
925 {
926 bfd *dynobj;
927 asection *s;
928 unsigned int power_of_two;
929
930 dynobj = elf_hash_table (info)->dynobj;
931
932 /* Make sure we know what is going on here. */
933 BFD_ASSERT (dynobj != NULL
934 && (h->needs_plt
935 || h->u.weakdef != NULL
936 || (h->def_dynamic
937 && h->ref_regular
938 && !h->def_regular)));
939
940 /* If this is a function, put it in the procedure linkage table. We
941 will fill in the contents of the procedure linkage table later,
942 when we know the address of the .got section. */
943 if (h->type == STT_FUNC
944 || h->needs_plt)
945 {
946 if (! info->shared
947 && !h->def_dynamic
948 && !h->ref_dynamic
949 /* We must always create the plt entry if it was referenced
950 by a PLTxxO relocation. In this case we already recorded
951 it as a dynamic symbol. */
952 && h->dynindx == -1)
953 {
954 /* This case can occur if we saw a PLTxx reloc in an input
955 file, but the symbol was never referred to by a dynamic
956 object. In such a case, we don't actually need to build
957 a procedure linkage table, and we can just do a PCxx
958 reloc instead. */
959 BFD_ASSERT (h->needs_plt);
960 h->plt.offset = (bfd_vma) -1;
961 return TRUE;
962 }
963
964 /* GC may have rendered this entry unused. */
965 if (h->plt.refcount <= 0)
966 {
967 h->needs_plt = 0;
968 h->plt.offset = (bfd_vma) -1;
969 return TRUE;
970 }
971
972 /* Make sure this symbol is output as a dynamic symbol. */
973 if (h->dynindx == -1)
974 {
975 if (! bfd_elf_link_record_dynamic_symbol (info, h))
976 return FALSE;
977 }
978
979 s = bfd_get_section_by_name (dynobj, ".plt");
980 BFD_ASSERT (s != NULL);
981
982 /* If this is the first .plt entry, make room for the special
983 first entry. */
984 if (s->size == 0)
985 {
986 s->size += PLT_ENTRY_SIZE;
987 }
988
989 /* If this symbol is not defined in a regular file, and we are
990 not generating a shared library, then set the symbol to this
991 location in the .plt. This is required to make function
992 pointers compare as equal between the normal executable and
993 the shared library. */
994 if (!info->shared
995 && !h->def_regular)
996 {
997 h->root.u.def.section = s;
998 h->root.u.def.value = s->size;
999 }
1000
1001 h->plt.offset = s->size;
1002
1003 /* Make room for this entry. */
1004 s->size += PLT_ENTRY_SIZE;
1005
1006 /* We also need to make an entry in the .got.plt section, which
1007 will be placed in the .got section by the linker script. */
1008
1009 s = bfd_get_section_by_name (dynobj, ".got.plt");
1010 BFD_ASSERT (s != NULL);
1011 s->size += 4;
1012
1013 /* We also need to make an entry in the .rela.plt section. */
1014
1015 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1016 BFD_ASSERT (s != NULL);
1017 s->size += sizeof (Elf32_External_Rela);
1018
1019 return TRUE;
1020 }
1021
1022 /* Reinitialize the plt offset now that it is not used as a reference
1023 count any more. */
1024 h->plt.offset = (bfd_vma) -1;
1025
1026 /* If this is a weak symbol, and there is a real definition, the
1027 processor independent code will have arranged for us to see the
1028 real definition first, and we can just use the same value. */
1029 if (h->u.weakdef != NULL)
1030 {
1031 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1032 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1033 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1034 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1035 return TRUE;
1036 }
1037
1038 /* This is a reference to a symbol defined by a dynamic object which
1039 is not a function. */
1040
1041 /* If we are creating a shared library, we must presume that the
1042 only references to the symbol are via the global offset table.
1043 For such cases we need not do anything here; the relocations will
1044 be handled correctly by relocate_section. */
1045 if (info->shared)
1046 return TRUE;
1047
1048 if (h->size == 0)
1049 {
1050 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1051 h->root.root.string);
1052 return TRUE;
1053 }
1054
1055 /* We must allocate the symbol in our .dynbss section, which will
1056 become part of the .bss section of the executable. There will be
1057 an entry for this symbol in the .dynsym section. The dynamic
1058 object will contain position independent code, so all references
1059 from the dynamic object to this symbol will go through the global
1060 offset table. The dynamic linker will use the .dynsym entry to
1061 determine the address it must put in the global offset table, so
1062 both the dynamic object and the regular object will refer to the
1063 same memory location for the variable. */
1064
1065 s = bfd_get_section_by_name (dynobj, ".dynbss");
1066 BFD_ASSERT (s != NULL);
1067
1068 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1069 copy the initial value out of the dynamic object and into the
1070 runtime process image. We need to remember the offset into the
1071 .rela.bss section we are going to use. */
1072 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1073 {
1074 asection *srel;
1075
1076 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1077 BFD_ASSERT (srel != NULL);
1078 srel->size += sizeof (Elf32_External_Rela);
1079 h->needs_copy = 1;
1080 }
1081
1082 /* We need to figure out the alignment required for this symbol. I
1083 have no idea how ELF linkers handle this. */
1084 power_of_two = bfd_log2 (h->size);
1085 if (power_of_two > 3)
1086 power_of_two = 3;
1087
1088 /* Apply the required alignment. */
1089 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1090 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1091 {
1092 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
1093 return FALSE;
1094 }
1095
1096 /* Define the symbol as being at this point in the section. */
1097 h->root.u.def.section = s;
1098 h->root.u.def.value = s->size;
1099
1100 /* Increment the section size to make room for the symbol. */
1101 s->size += h->size;
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_section_by_name (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 else
1132 {
1133 /* We may have created entries in the .rela.got and .got sections.
1134 However, if we are not creating the dynamic sections, we will
1135 not actually use these entries. Reset the size of .rela.got
1136 and .got, which will cause it to get stripped from the output
1137 file below. */
1138 s = bfd_get_section_by_name (dynobj, ".rela.got");
1139 if (s != NULL)
1140 s->size = 0;
1141 s = bfd_get_section_by_name (dynobj, ".got.plt");
1142 if (s != NULL)
1143 s->size = 0;
1144 s = bfd_get_section_by_name (dynobj, ".got");
1145 if (s != NULL)
1146 s->size = 0;
1147 }
1148
1149 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1150 relative relocs against symbols defined in a regular object. We
1151 allocated space for them in the check_relocs routine, but we will not
1152 fill them in in the relocate_section routine. */
1153 if (info->shared && info->symbolic)
1154 elf_vax_link_hash_traverse (elf_vax_hash_table (info),
1155 elf_vax_discard_copies,
1156 NULL);
1157
1158 /* If this is a -Bsymbolic shared link or a static link, we need to
1159 discard all the got entries we've recorded. Otherwise, we need to
1160 instantiate (allocate space for them). */
1161 elf_link_hash_traverse (elf_hash_table (info),
1162 elf_vax_instantiate_got_entries,
1163 (PTR) info);
1164
1165 /* The check_relocs and adjust_dynamic_symbol entry points have
1166 determined the sizes of the various dynamic sections. Allocate
1167 memory for them. */
1168 plt = FALSE;
1169 relocs = FALSE;
1170 reltext = FALSE;
1171 for (s = dynobj->sections; s != NULL; s = s->next)
1172 {
1173 const char *name;
1174
1175 if ((s->flags & SEC_LINKER_CREATED) == 0)
1176 continue;
1177
1178 /* It's OK to base decisions on the section name, because none
1179 of the dynobj section names depend upon the input files. */
1180 name = bfd_get_section_name (dynobj, s);
1181
1182 if (strcmp (name, ".plt") == 0)
1183 {
1184 /* Remember whether there is a PLT. */
1185 plt = s->size != 0;
1186 }
1187 else if (CONST_STRNEQ (name, ".rela"))
1188 {
1189 if (s->size != 0)
1190 {
1191 asection *target;
1192
1193 /* Remember whether there are any reloc sections other
1194 than .rela.plt. */
1195 if (strcmp (name, ".rela.plt") != 0)
1196 {
1197 const char *outname;
1198
1199 relocs = TRUE;
1200
1201 /* If this relocation section applies to a read only
1202 section, then we probably need a DT_TEXTREL
1203 entry. .rela.plt is actually associated with
1204 .got.plt, which is never readonly. */
1205 outname = bfd_get_section_name (output_bfd,
1206 s->output_section);
1207 target = bfd_get_section_by_name (output_bfd, outname + 5);
1208 if (target != NULL
1209 && (target->flags & SEC_READONLY) != 0
1210 && (target->flags & SEC_ALLOC) != 0)
1211 reltext = TRUE;
1212 }
1213
1214 /* We use the reloc_count field as a counter if we need
1215 to copy relocs into the output file. */
1216 s->reloc_count = 0;
1217 }
1218 }
1219 else if (! CONST_STRNEQ (name, ".got")
1220 && strcmp (name, ".dynbss") != 0)
1221 {
1222 /* It's not one of our sections, so don't allocate space. */
1223 continue;
1224 }
1225
1226 if (s->size == 0)
1227 {
1228 /* If we don't need this section, strip it from the
1229 output file. This is mostly to handle .rela.bss and
1230 .rela.plt. We must create both sections in
1231 create_dynamic_sections, because they must be created
1232 before the linker maps input sections to output
1233 sections. The linker does that before
1234 adjust_dynamic_symbol is called, and it is that
1235 function which decides whether anything needs to go
1236 into these sections. */
1237 s->flags |= SEC_EXCLUDE;
1238 continue;
1239 }
1240
1241 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1242 continue;
1243
1244 /* Allocate memory for the section contents. */
1245 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1246 if (s->contents == NULL)
1247 return FALSE;
1248 }
1249
1250 if (elf_hash_table (info)->dynamic_sections_created)
1251 {
1252 /* Add some entries to the .dynamic section. We fill in the
1253 values later, in elf_vax_finish_dynamic_sections, but we
1254 must add the entries now so that we get the correct size for
1255 the .dynamic section. The DT_DEBUG entry is filled in by the
1256 dynamic linker and used by the debugger. */
1257 #define add_dynamic_entry(TAG, VAL) \
1258 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1259
1260 if (!info->shared)
1261 {
1262 if (!add_dynamic_entry (DT_DEBUG, 0))
1263 return FALSE;
1264 }
1265
1266 if (plt)
1267 {
1268 if (!add_dynamic_entry (DT_PLTGOT, 0)
1269 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1270 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1271 || !add_dynamic_entry (DT_JMPREL, 0))
1272 return FALSE;
1273 }
1274
1275 if (relocs)
1276 {
1277 if (!add_dynamic_entry (DT_RELA, 0)
1278 || !add_dynamic_entry (DT_RELASZ, 0)
1279 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1280 return FALSE;
1281 }
1282
1283 if (reltext || (info->flags & DF_TEXTREL) != 0)
1284 {
1285 if (!add_dynamic_entry (DT_TEXTREL, 0))
1286 return FALSE;
1287 }
1288 }
1289 #undef add_dynamic_entry
1290
1291 return TRUE;
1292 }
1293
1294 /* This function is called via elf_vax_link_hash_traverse if we are
1295 creating a shared object with -Bsymbolic. It discards the space
1296 allocated to copy PC relative relocs against symbols which are defined
1297 in regular objects. We allocated space for them in the check_relocs
1298 routine, but we won't fill them in in the relocate_section routine. */
1299
1300 static bfd_boolean
1301 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1302 PTR ignore ATTRIBUTE_UNUSED)
1303 {
1304 struct elf_vax_pcrel_relocs_copied *s;
1305
1306 if (h->root.root.type == bfd_link_hash_warning)
1307 h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
1308
1309 /* We only discard relocs for symbols defined in a regular object. */
1310 if (!h->root.def_regular)
1311 return TRUE;
1312
1313 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1314 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1315
1316 return TRUE;
1317 }
1318
1319 /* This function is called via elf_link_hash_traverse. It looks for entries
1320 that have GOT or PLT (.GOT) references. If creating a static object or a
1321 shared object with -Bsymbolic, it resets the reference count back to 0
1322 and sets the offset to -1 so normal PC32 relocation will be done. If
1323 creating a shared object or executable, space in the .got and .rela.got
1324 will be reserved for the symbol. */
1325
1326 static bfd_boolean
1327 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, PTR infoptr)
1328 {
1329 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1330 bfd *dynobj;
1331 asection *sgot;
1332 asection *srelgot;
1333
1334 /* We don't care about non-GOT (and non-PLT) entries. */
1335 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1336 return TRUE;
1337
1338 dynobj = elf_hash_table (info)->dynobj;
1339 if (dynobj == NULL)
1340 return TRUE;
1341
1342 sgot = bfd_get_section_by_name (dynobj, ".got");
1343 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1344
1345 if (!elf_hash_table (info)->dynamic_sections_created
1346 || (info->shared && info->symbolic))
1347 {
1348 h->got.refcount = 0;
1349 h->got.offset = (bfd_vma) -1;
1350 h->plt.refcount = 0;
1351 h->plt.offset = (bfd_vma) -1;
1352 }
1353 else if (h->got.refcount > 0)
1354 {
1355 /* Make sure this symbol is output as a dynamic symbol. */
1356 if (h->dynindx == -1)
1357 {
1358 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1359 return FALSE;
1360 }
1361
1362 /* Allocate space in the .got and .rela.got sections. */
1363 sgot->size += 4;
1364 srelgot->size += sizeof (Elf32_External_Rela);
1365 }
1366
1367 return TRUE;
1368 }
1369
1370 /* Relocate an VAX ELF section. */
1371
1372 static bfd_boolean
1373 elf_vax_relocate_section (bfd *output_bfd,
1374 struct bfd_link_info *info,
1375 bfd *input_bfd,
1376 asection *input_section,
1377 bfd_byte *contents,
1378 Elf_Internal_Rela *relocs,
1379 Elf_Internal_Sym *local_syms,
1380 asection **local_sections)
1381 {
1382 bfd *dynobj;
1383 Elf_Internal_Shdr *symtab_hdr;
1384 struct elf_link_hash_entry **sym_hashes;
1385 bfd_vma *local_got_offsets;
1386 bfd_vma plt_index;
1387 bfd_vma got_offset;
1388 asection *sgot;
1389 asection *splt;
1390 asection *sgotplt;
1391 asection *sreloc;
1392 Elf_Internal_Rela *rel;
1393 Elf_Internal_Rela *relend;
1394
1395 dynobj = elf_hash_table (info)->dynobj;
1396 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1397 sym_hashes = elf_sym_hashes (input_bfd);
1398 local_got_offsets = elf_local_got_offsets (input_bfd);
1399
1400 sgot = NULL;
1401 splt = NULL;
1402 sgotplt = NULL;
1403 sreloc = NULL;
1404
1405 rel = relocs;
1406 relend = relocs + input_section->reloc_count;
1407 for (; rel < relend; rel++)
1408 {
1409 int r_type;
1410 reloc_howto_type *howto;
1411 unsigned long r_symndx;
1412 struct elf_link_hash_entry *h;
1413 Elf_Internal_Sym *sym;
1414 asection *sec;
1415 bfd_vma relocation;
1416 bfd_reloc_status_type r;
1417
1418 r_type = ELF32_R_TYPE (rel->r_info);
1419 if (r_type < 0 || r_type >= (int) R_VAX_max)
1420 {
1421 bfd_set_error (bfd_error_bad_value);
1422 return FALSE;
1423 }
1424 howto = howto_table + r_type;
1425
1426 r_symndx = ELF32_R_SYM (rel->r_info);
1427 h = NULL;
1428 sym = NULL;
1429 sec = NULL;
1430 if (r_symndx < symtab_hdr->sh_info)
1431 {
1432 sym = local_syms + r_symndx;
1433 sec = local_sections[r_symndx];
1434 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1435 }
1436 else
1437 {
1438 bfd_boolean unresolved_reloc;
1439 bfd_boolean warned;
1440
1441 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1442 r_symndx, symtab_hdr, sym_hashes,
1443 h, sec, relocation,
1444 unresolved_reloc, warned);
1445
1446 if ((h->root.type == bfd_link_hash_defined
1447 || h->root.type == bfd_link_hash_defweak)
1448 && ((r_type == R_VAX_PLT32
1449 && h->plt.offset != (bfd_vma) -1
1450 && elf_hash_table (info)->dynamic_sections_created)
1451 || (r_type == R_VAX_GOT32
1452 && strcmp (h->root.root.string,
1453 "_GLOBAL_OFFSET_TABLE_") != 0
1454 && elf_hash_table (info)->dynamic_sections_created
1455 && (! info->shared
1456 || (! info->symbolic && h->dynindx != -1)
1457 || !h->def_regular))
1458 || (info->shared
1459 && ((! info->symbolic && h->dynindx != -1)
1460 || !h->def_regular)
1461 && ((input_section->flags & SEC_ALLOC) != 0
1462 /* DWARF will emit R_VAX_32 relocations in its
1463 sections against symbols defined externally
1464 in shared libraries. We can't do anything
1465 with them here. */
1466
1467 || ((input_section->flags & SEC_DEBUGGING) != 0
1468 && h->def_dynamic))
1469 && (r_type == R_VAX_8
1470 || r_type == R_VAX_16
1471 || r_type == R_VAX_32
1472 || r_type == R_VAX_PC8
1473 || r_type == R_VAX_PC16
1474 || r_type == R_VAX_PC32))))
1475 /* In these cases, we don't need the relocation
1476 value. We check specially because in some
1477 obscure cases sec->output_section will be NULL. */
1478 relocation = 0;
1479 }
1480
1481 if (sec != NULL && elf_discarded_section (sec))
1482 {
1483 /* For relocs against symbols from removed linkonce sections,
1484 or sections discarded by a linker script, we just want the
1485 section contents zeroed. Avoid any special processing. */
1486 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1487 rel->r_info = 0;
1488 rel->r_addend = 0;
1489 continue;
1490 }
1491
1492 if (info->relocatable)
1493 continue;
1494
1495 switch (r_type)
1496 {
1497 case R_VAX_GOT32:
1498 /* Relocation is to the address of the entry for this symbol
1499 in the global offset table. */
1500 if (h == NULL || h->got.offset == (bfd_vma) -1)
1501 break;
1502
1503 /* Relocation is the offset of the entry for this symbol in
1504 the global offset table. */
1505
1506 {
1507 bfd_vma off;
1508
1509 if (sgot == NULL)
1510 {
1511 sgot = bfd_get_section_by_name (dynobj, ".got");
1512 BFD_ASSERT (sgot != NULL);
1513 }
1514
1515 BFD_ASSERT (h != NULL);
1516 off = h->got.offset;
1517 BFD_ASSERT (off != (bfd_vma) -1);
1518 BFD_ASSERT (off < sgot->size);
1519
1520 if (info->shared
1521 && h->dynindx == -1
1522 && h->def_regular)
1523 {
1524 /* The symbol was forced to be local
1525 because of a version file.. We must initialize
1526 this entry in the global offset table. Since
1527 the offset must always be a multiple of 4, we
1528 use the least significant bit to record whether
1529 we have initialized it already.
1530
1531 When doing a dynamic link, we create a .rela.got
1532 relocation entry to initialize the value. This
1533 is done in the finish_dynamic_symbol routine. */
1534 if ((off & 1) != 0)
1535 off &= ~1;
1536 else
1537 {
1538 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1539 sgot->contents + off);
1540 h->got.offset |= 1;
1541 }
1542 } else {
1543 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1544 }
1545
1546 relocation = sgot->output_offset + off;
1547 /* The GOT relocation uses the addend. */
1548 rel->r_addend = 0;
1549
1550 /* Change the reference to be indirect. */
1551 contents[rel->r_offset - 1] |= 0x10;
1552 relocation += sgot->output_section->vma;
1553 }
1554 break;
1555
1556 case R_VAX_PLT32:
1557 /* Relocation is to the entry for this symbol in the
1558 procedure linkage table. */
1559
1560 /* Resolve a PLTxx reloc against a local symbol directly,
1561 without using the procedure linkage table. */
1562 if (h == NULL)
1563 break;
1564
1565 if (h->plt.offset == (bfd_vma) -1
1566 || !elf_hash_table (info)->dynamic_sections_created)
1567 {
1568 /* We didn't make a PLT entry for this symbol. This
1569 happens when statically linking PIC code, or when
1570 using -Bsymbolic. */
1571 break;
1572 }
1573
1574 if (splt == NULL)
1575 {
1576 splt = bfd_get_section_by_name (dynobj, ".plt");
1577 BFD_ASSERT (splt != NULL);
1578 }
1579
1580 if (sgotplt == NULL)
1581 {
1582 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1583 BFD_ASSERT (splt != NULL);
1584 }
1585
1586 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1587
1588 /* Get the offset into the .got table of the entry that
1589 corresponds to this function. Each .got entry is 4 bytes.
1590 The first two are reserved. */
1591 got_offset = (plt_index + 3) * 4;
1592
1593 /* We want the relocate to point into the .got.plt instead
1594 of the plt itself. */
1595 relocation = (sgotplt->output_section->vma
1596 + sgotplt->output_offset
1597 + got_offset);
1598 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1599 if (rel->r_addend == 2)
1600 {
1601 h->plt.offset |= 1;
1602 }
1603 else if (rel->r_addend != 0)
1604 (*_bfd_error_handler)
1605 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1606 bfd_get_filename (input_bfd), rel->r_addend,
1607 h->root.root.string,
1608 bfd_get_section_name (input_bfd, input_section));
1609 rel->r_addend = 0;
1610
1611 break;
1612
1613 case R_VAX_PC8:
1614 case R_VAX_PC16:
1615 case R_VAX_PC32:
1616 if (h == NULL)
1617 break;
1618 /* Fall through. */
1619 case R_VAX_8:
1620 case R_VAX_16:
1621 case R_VAX_32:
1622 if (info->shared
1623 && r_symndx != 0
1624 && (input_section->flags & SEC_ALLOC) != 0
1625 && ((r_type != R_VAX_PC8
1626 && r_type != R_VAX_PC16
1627 && r_type != R_VAX_PC32)
1628 || (!info->symbolic
1629 || !h->def_regular)))
1630 {
1631 Elf_Internal_Rela outrel;
1632 bfd_byte *loc;
1633 bfd_boolean skip, relocate;
1634
1635 /* When generating a shared object, these relocations
1636 are copied into the output file to be resolved at run
1637 time. */
1638 if (sreloc == NULL)
1639 {
1640 const char *name;
1641
1642 name = (bfd_elf_string_from_elf_section
1643 (input_bfd,
1644 elf_elfheader (input_bfd)->e_shstrndx,
1645 elf_section_data (input_section)->rel_hdr.sh_name));
1646 if (name == NULL)
1647 return FALSE;
1648
1649 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
1650 && strcmp (bfd_get_section_name (input_bfd,
1651 input_section),
1652 name + 5) == 0);
1653
1654 sreloc = bfd_get_section_by_name (dynobj, name);
1655 BFD_ASSERT (sreloc != NULL);
1656 }
1657
1658 skip = FALSE;
1659 relocate = FALSE;
1660
1661 outrel.r_offset =
1662 _bfd_elf_section_offset (output_bfd, info, input_section,
1663 rel->r_offset);
1664 if (outrel.r_offset == (bfd_vma) -1)
1665 skip = TRUE;
1666 if (outrel.r_offset == (bfd_vma) -2)
1667 skip = TRUE, relocate = TRUE;
1668 outrel.r_offset += (input_section->output_section->vma
1669 + input_section->output_offset);
1670
1671 if (skip)
1672 memset (&outrel, 0, sizeof outrel);
1673 /* h->dynindx may be -1 if the symbol was marked to
1674 become local. */
1675 else if (h != NULL
1676 && ((! info->symbolic && h->dynindx != -1)
1677 || !h->def_regular))
1678 {
1679 BFD_ASSERT (h->dynindx != -1);
1680 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1681 outrel.r_addend = relocation + rel->r_addend;
1682 }
1683 else
1684 {
1685 if (r_type == R_VAX_32)
1686 {
1687 relocate = TRUE;
1688 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1689 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1690 &contents[rel->r_offset]) == 0);
1691 outrel.r_addend = relocation + rel->r_addend;
1692 }
1693 else
1694 {
1695 long indx;
1696
1697 if (bfd_is_abs_section (sec))
1698 indx = 0;
1699 else if (sec == NULL || sec->owner == NULL)
1700 {
1701 bfd_set_error (bfd_error_bad_value);
1702 return FALSE;
1703 }
1704 else
1705 {
1706 asection *osec;
1707
1708 /* We are turning this relocation into one
1709 against a section symbol. It would be
1710 proper to subtract the symbol's value,
1711 osec->vma, from the emitted reloc addend,
1712 but ld.so expects buggy relocs. */
1713 osec = sec->output_section;
1714 indx = elf_section_data (osec)->dynindx;
1715 if (indx == 0)
1716 {
1717 struct elf_link_hash_table *htab;
1718 htab = elf_hash_table (info);
1719 osec = htab->text_index_section;
1720 indx = elf_section_data (osec)->dynindx;
1721 }
1722 BFD_ASSERT (indx != 0);
1723 }
1724
1725 outrel.r_info = ELF32_R_INFO (indx, r_type);
1726 outrel.r_addend = relocation + rel->r_addend;
1727 }
1728 }
1729
1730 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1731 ".text") != 0 ||
1732 (info->shared
1733 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1734 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1735 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1736 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1737 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1738 {
1739 if (h != NULL)
1740 (*_bfd_error_handler)
1741 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1742 bfd_get_filename (input_bfd), howto->name,
1743 h->root.root.string,
1744 bfd_get_section_name (input_bfd, input_section));
1745 else
1746 (*_bfd_error_handler)
1747 (_("%s: warning: %s relocation to 0x%x from %s section"),
1748 bfd_get_filename (input_bfd), howto->name,
1749 outrel.r_addend,
1750 bfd_get_section_name (input_bfd, input_section));
1751 }
1752 loc = sreloc->contents;
1753 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1754 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1755
1756 /* This reloc will be computed at runtime, so there's no
1757 need to do anything now, except for R_VAX_32
1758 relocations that have been turned into
1759 R_VAX_RELATIVE. */
1760 if (!relocate)
1761 continue;
1762 }
1763
1764 break;
1765
1766 case R_VAX_GNU_VTINHERIT:
1767 case R_VAX_GNU_VTENTRY:
1768 /* These are no-ops in the end. */
1769 continue;
1770
1771 default:
1772 break;
1773 }
1774
1775 /* VAX PCREL relocations are from the end of relocation, not the start.
1776 So subtract the difference from the relocation amount since we can't
1777 add it to the offset. */
1778 if (howto->pc_relative && howto->pcrel_offset)
1779 relocation -= bfd_get_reloc_size(howto);
1780
1781 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1782 contents, rel->r_offset,
1783 relocation, rel->r_addend);
1784
1785 if (r != bfd_reloc_ok)
1786 {
1787 switch (r)
1788 {
1789 default:
1790 case bfd_reloc_outofrange:
1791 abort ();
1792 case bfd_reloc_overflow:
1793 {
1794 const char *name;
1795
1796 if (h != NULL)
1797 name = NULL;
1798 else
1799 {
1800 name = bfd_elf_string_from_elf_section (input_bfd,
1801 symtab_hdr->sh_link,
1802 sym->st_name);
1803 if (name == NULL)
1804 return FALSE;
1805 if (*name == '\0')
1806 name = bfd_section_name (input_bfd, sec);
1807 }
1808 if (!(info->callbacks->reloc_overflow
1809 (info, (h ? &h->root : NULL), name, howto->name,
1810 (bfd_vma) 0, input_bfd, input_section,
1811 rel->r_offset)))
1812 return FALSE;
1813 }
1814 break;
1815 }
1816 }
1817 }
1818
1819 return TRUE;
1820 }
1821
1822 /* Finish up dynamic symbol handling. We set the contents of various
1823 dynamic sections here. */
1824
1825 static bfd_boolean
1826 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1827 struct elf_link_hash_entry *h,
1828 Elf_Internal_Sym *sym)
1829 {
1830 bfd *dynobj;
1831
1832 dynobj = elf_hash_table (info)->dynobj;
1833
1834 if (h->plt.offset != (bfd_vma) -1)
1835 {
1836 asection *splt;
1837 asection *sgot;
1838 asection *srela;
1839 bfd_vma plt_index;
1840 bfd_vma got_offset;
1841 bfd_vma addend;
1842 Elf_Internal_Rela rela;
1843 bfd_byte *loc;
1844
1845 /* This symbol has an entry in the procedure linkage table. Set
1846 it up. */
1847 BFD_ASSERT (h->dynindx != -1);
1848
1849 splt = bfd_get_section_by_name (dynobj, ".plt");
1850 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1851 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1852 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1853
1854 addend = 2 * (h->plt.offset & 1);
1855 h->plt.offset &= ~1;
1856
1857 /* Get the index in the procedure linkage table which
1858 corresponds to this symbol. This is the index of this symbol
1859 in all the symbols for which we are making plt entries. The
1860 first entry in the procedure linkage table is reserved. */
1861 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1862
1863 /* Get the offset into the .got table of the entry that
1864 corresponds to this function. Each .got entry is 4 bytes.
1865 The first two are reserved. */
1866 got_offset = (plt_index + 3) * 4;
1867
1868 /* Fill in the entry in the procedure linkage table. */
1869 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1870 PLT_ENTRY_SIZE);
1871
1872 /* The offset is relative to the first extension word. */
1873 bfd_put_32 (output_bfd,
1874 -(h->plt.offset + 8),
1875 splt->contents + h->plt.offset + 4);
1876
1877 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1878 splt->contents + h->plt.offset + 8);
1879
1880 /* Fill in the entry in the global offset table. */
1881 bfd_put_32 (output_bfd,
1882 (splt->output_section->vma
1883 + splt->output_offset
1884 + h->plt.offset) + addend,
1885 sgot->contents + got_offset);
1886
1887 /* Fill in the entry in the .rela.plt section. */
1888 rela.r_offset = (sgot->output_section->vma
1889 + sgot->output_offset
1890 + got_offset);
1891 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1892 rela.r_addend = addend;
1893 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1894 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1895
1896 if (!h->def_regular)
1897 {
1898 /* Mark the symbol as undefined, rather than as defined in
1899 the .plt section. Leave the value alone. */
1900 sym->st_shndx = SHN_UNDEF;
1901 }
1902 }
1903
1904 if (h->got.offset != (bfd_vma) -1)
1905 {
1906 asection *sgot;
1907 asection *srela;
1908 Elf_Internal_Rela rela;
1909 bfd_byte *loc;
1910
1911 /* This symbol has an entry in the global offset table. Set it
1912 up. */
1913 sgot = bfd_get_section_by_name (dynobj, ".got");
1914 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1915 BFD_ASSERT (sgot != NULL && srela != NULL);
1916
1917 rela.r_offset = (sgot->output_section->vma
1918 + sgot->output_offset
1919 + (h->got.offset &~ 1));
1920
1921 /* If the symbol was forced to be local because of a version file
1922 locally we just want to emit a RELATIVE reloc. The entry in
1923 the global offset table will already have been initialized in
1924 the relocate_section function. */
1925 if (info->shared
1926 && h->dynindx == -1
1927 && h->def_regular)
1928 {
1929 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1930 }
1931 else
1932 {
1933 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1934 }
1935 rela.r_addend = bfd_get_signed_32 (output_bfd,
1936 (sgot->contents
1937 + (h->got.offset & ~1)));
1938
1939 loc = srela->contents;
1940 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1941 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1942 }
1943
1944 if (h->needs_copy)
1945 {
1946 asection *s;
1947 Elf_Internal_Rela rela;
1948 bfd_byte *loc;
1949
1950 /* This symbol needs a copy reloc. Set it up. */
1951 BFD_ASSERT (h->dynindx != -1
1952 && (h->root.type == bfd_link_hash_defined
1953 || h->root.type == bfd_link_hash_defweak));
1954
1955 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1956 ".rela.bss");
1957 BFD_ASSERT (s != NULL);
1958
1959 rela.r_offset = (h->root.u.def.value
1960 + h->root.u.def.section->output_section->vma
1961 + h->root.u.def.section->output_offset);
1962 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1963 rela.r_addend = 0;
1964 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1965 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1966 }
1967
1968 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1969 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1970 || h == elf_hash_table (info)->hgot)
1971 sym->st_shndx = SHN_ABS;
1972
1973 return TRUE;
1974 }
1975
1976 /* Finish up the dynamic sections. */
1977
1978 static bfd_boolean
1979 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1980 {
1981 bfd *dynobj;
1982 asection *sgot;
1983 asection *sdyn;
1984
1985 dynobj = elf_hash_table (info)->dynobj;
1986
1987 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1988 BFD_ASSERT (sgot != NULL);
1989 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1990
1991 if (elf_hash_table (info)->dynamic_sections_created)
1992 {
1993 asection *splt;
1994 Elf32_External_Dyn *dyncon, *dynconend;
1995
1996 splt = bfd_get_section_by_name (dynobj, ".plt");
1997 BFD_ASSERT (splt != NULL && sdyn != NULL);
1998
1999 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2000 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2001 for (; dyncon < dynconend; dyncon++)
2002 {
2003 Elf_Internal_Dyn dyn;
2004 const char *name;
2005 asection *s;
2006
2007 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2008
2009 switch (dyn.d_tag)
2010 {
2011 default:
2012 break;
2013
2014 case DT_PLTGOT:
2015 name = ".got";
2016 goto get_vma;
2017 case DT_JMPREL:
2018 name = ".rela.plt";
2019 get_vma:
2020 s = bfd_get_section_by_name (output_bfd, name);
2021 BFD_ASSERT (s != NULL);
2022 dyn.d_un.d_ptr = s->vma;
2023 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2024 break;
2025
2026 case DT_PLTRELSZ:
2027 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2028 BFD_ASSERT (s != NULL);
2029 dyn.d_un.d_val = s->size;
2030 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2031 break;
2032
2033 case DT_RELASZ:
2034 /* The procedure linkage table relocs (DT_JMPREL) should
2035 not be included in the overall relocs (DT_RELA).
2036 Therefore, we override the DT_RELASZ entry here to
2037 make it not include the JMPREL relocs. Since the
2038 linker script arranges for .rela.plt to follow all
2039 other relocation sections, we don't have to worry
2040 about changing the DT_RELA entry. */
2041 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2042 if (s != NULL)
2043 dyn.d_un.d_val -= s->size;
2044 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2045 break;
2046 }
2047 }
2048
2049 /* Fill in the first entry in the procedure linkage table. */
2050 if (splt->size > 0)
2051 {
2052 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2053 bfd_put_32 (output_bfd,
2054 (sgot->output_section->vma
2055 + sgot->output_offset + 4
2056 - (splt->output_section->vma + 6)),
2057 splt->contents + 2);
2058 bfd_put_32 (output_bfd,
2059 (sgot->output_section->vma
2060 + sgot->output_offset + 8
2061 - (splt->output_section->vma + 12)),
2062 splt->contents + 8);
2063 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2064 = PLT_ENTRY_SIZE;
2065 }
2066 }
2067
2068 /* Fill in the first three entries in the global offset table. */
2069 if (sgot->size > 0)
2070 {
2071 if (sdyn == NULL)
2072 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2073 else
2074 bfd_put_32 (output_bfd,
2075 sdyn->output_section->vma + sdyn->output_offset,
2076 sgot->contents);
2077 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2078 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2079 }
2080
2081 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2082
2083 return TRUE;
2084 }
2085
2086 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2087 #define TARGET_LITTLE_NAME "elf32-vax"
2088 #define ELF_MACHINE_CODE EM_VAX
2089 #define ELF_MAXPAGESIZE 0x1000
2090
2091 #define elf_backend_create_dynamic_sections \
2092 _bfd_elf_create_dynamic_sections
2093 #define bfd_elf32_bfd_link_hash_table_create \
2094 elf_vax_link_hash_table_create
2095 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2096
2097 #define elf_backend_check_relocs elf_vax_check_relocs
2098 #define elf_backend_adjust_dynamic_symbol \
2099 elf_vax_adjust_dynamic_symbol
2100 #define elf_backend_size_dynamic_sections \
2101 elf_vax_size_dynamic_sections
2102 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2103 #define elf_backend_relocate_section elf_vax_relocate_section
2104 #define elf_backend_finish_dynamic_symbol \
2105 elf_vax_finish_dynamic_symbol
2106 #define elf_backend_finish_dynamic_sections \
2107 elf_vax_finish_dynamic_sections
2108 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2109 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2110 #define bfd_elf32_bfd_merge_private_bfd_data \
2111 elf32_vax_merge_private_bfd_data
2112 #define bfd_elf32_bfd_set_private_flags \
2113 elf32_vax_set_private_flags
2114 #define bfd_elf32_bfd_print_private_bfd_data \
2115 elf32_vax_print_private_bfd_data
2116
2117 #define elf_backend_can_gc_sections 1
2118 #define elf_backend_want_got_plt 1
2119 #define elf_backend_plt_readonly 1
2120 #define elf_backend_want_plt_sym 0
2121 #define elf_backend_got_header_size 16
2122 #define elf_backend_rela_normal 1
2123
2124 #include "elf32-target.h"
git-cvsimport of binutils cvsroot