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sim: bfin: only regen linux-fixed-code.h in maintainer mode
[deliverable/binutils-gdb.git] / bfd / elf32-vax.c
1 /* VAX series support for 32-bit ELF
2 Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
5 Contributed by Matt Thomas <matt@3am-software.com>.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
23
24 #include "sysdep.h"
25 #include "bfd.h"
26 #include "bfdlink.h"
27 #include "libbfd.h"
28 #include "elf-bfd.h"
29 #include "elf/vax.h"
30
31 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
32 static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
33 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
34 struct bfd_hash_table *,
35 const char *);
36 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
37 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
38 asection *, const Elf_Internal_Rela *);
39 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
40 struct elf_link_hash_entry *);
41 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
42 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
43 bfd *, asection *, bfd_byte *,
44 Elf_Internal_Rela *,
45 Elf_Internal_Sym *, asection **);
46 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
47 struct elf_link_hash_entry *,
48 Elf_Internal_Sym *);
49 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
50 struct bfd_link_info *);
51 static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *,
52 const arelent *);
53
54 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
55 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
56 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, void *);
57
58 static reloc_howto_type howto_table[] = {
59 HOWTO (R_VAX_NONE, /* type */
60 0, /* rightshift */
61 0, /* size (0 = byte, 1 = short, 2 = long) */
62 0, /* bitsize */
63 FALSE, /* pc_relative */
64 0, /* bitpos */
65 complain_overflow_dont, /* complain_on_overflow */
66 bfd_elf_generic_reloc, /* special_function */
67 "R_VAX_NONE", /* name */
68 FALSE, /* partial_inplace */
69 0, /* src_mask */
70 0x00000000, /* dst_mask */
71 FALSE), /* pcrel_offset */
72
73 HOWTO (R_VAX_32, /* type */
74 0, /* rightshift */
75 2, /* size (0 = byte, 1 = short, 2 = long) */
76 32, /* bitsize */
77 FALSE, /* pc_relative */
78 0, /* bitpos */
79 complain_overflow_bitfield, /* complain_on_overflow */
80 bfd_elf_generic_reloc, /* special_function */
81 "R_VAX_32", /* name */
82 FALSE, /* partial_inplace */
83 0, /* src_mask */
84 0xffffffff, /* dst_mask */
85 FALSE), /* pcrel_offset */
86
87 HOWTO (R_VAX_16, /* type */
88 0, /* rightshift */
89 1, /* size (0 = byte, 1 = short, 2 = long) */
90 16, /* bitsize */
91 FALSE, /* pc_relative */
92 0, /* bitpos */
93 complain_overflow_bitfield, /* complain_on_overflow */
94 bfd_elf_generic_reloc, /* special_function */
95 "R_VAX_16", /* name */
96 FALSE, /* partial_inplace */
97 0, /* src_mask */
98 0x0000ffff, /* dst_mask */
99 FALSE), /* pcrel_offset */
100
101 HOWTO (R_VAX_8, /* type */
102 0, /* rightshift */
103 0, /* size (0 = byte, 1 = short, 2 = long) */
104 8, /* bitsize */
105 FALSE, /* pc_relative */
106 0, /* bitpos */
107 complain_overflow_bitfield, /* complain_on_overflow */
108 bfd_elf_generic_reloc, /* special_function */
109 "R_VAX_8", /* name */
110 FALSE, /* partial_inplace */
111 0, /* src_mask */
112 0x000000ff, /* dst_mask */
113 FALSE), /* pcrel_offset */
114
115 HOWTO (R_VAX_PC32, /* type */
116 0, /* rightshift */
117 2, /* size (0 = byte, 1 = short, 2 = long) */
118 32, /* bitsize */
119 TRUE, /* pc_relative */
120 0, /* bitpos */
121 complain_overflow_bitfield, /* complain_on_overflow */
122 bfd_elf_generic_reloc, /* special_function */
123 "R_VAX_PC32", /* name */
124 FALSE, /* partial_inplace */
125 0, /* src_mask */
126 0xffffffff, /* dst_mask */
127 TRUE), /* pcrel_offset */
128
129 HOWTO (R_VAX_PC16, /* type */
130 0, /* rightshift */
131 1, /* size (0 = byte, 1 = short, 2 = long) */
132 16, /* bitsize */
133 TRUE, /* pc_relative */
134 0, /* bitpos */
135 complain_overflow_signed, /* complain_on_overflow */
136 bfd_elf_generic_reloc, /* special_function */
137 "R_VAX_PC16", /* name */
138 FALSE, /* partial_inplace */
139 0, /* src_mask */
140 0x0000ffff, /* dst_mask */
141 TRUE), /* pcrel_offset */
142
143 HOWTO (R_VAX_PC8, /* type */
144 0, /* rightshift */
145 0, /* size (0 = byte, 1 = short, 2 = long) */
146 8, /* bitsize */
147 TRUE, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_signed, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_VAX_PC8", /* name */
152 FALSE, /* partial_inplace */
153 0, /* src_mask */
154 0x000000ff, /* dst_mask */
155 TRUE), /* pcrel_offset */
156
157 HOWTO (R_VAX_GOT32, /* type */
158 0, /* rightshift */
159 2, /* size (0 = byte, 1 = short, 2 = long) */
160 32, /* bitsize */
161 TRUE, /* pc_relative */
162 0, /* bitpos */
163 complain_overflow_bitfield, /* complain_on_overflow */
164 bfd_elf_generic_reloc, /* special_function */
165 "R_VAX_GOT32", /* name */
166 FALSE, /* partial_inplace */
167 0, /* src_mask */
168 0xffffffff, /* dst_mask */
169 TRUE), /* pcrel_offset */
170
171 EMPTY_HOWTO (-1),
172 EMPTY_HOWTO (-1),
173 EMPTY_HOWTO (-1),
174 EMPTY_HOWTO (-1),
175 EMPTY_HOWTO (-1),
176
177 HOWTO (R_VAX_PLT32, /* type */
178 0, /* rightshift */
179 2, /* size (0 = byte, 1 = short, 2 = long) */
180 32, /* bitsize */
181 TRUE, /* pc_relative */
182 0, /* bitpos */
183 complain_overflow_bitfield, /* complain_on_overflow */
184 bfd_elf_generic_reloc, /* special_function */
185 "R_VAX_PLT32", /* name */
186 FALSE, /* partial_inplace */
187 0, /* src_mask */
188 0xffffffff, /* dst_mask */
189 TRUE), /* pcrel_offset */
190
191 EMPTY_HOWTO (-1),
192 EMPTY_HOWTO (-1),
193 EMPTY_HOWTO (-1),
194 EMPTY_HOWTO (-1),
195 EMPTY_HOWTO (-1),
196
197 HOWTO (R_VAX_COPY, /* type */
198 0, /* rightshift */
199 0, /* size (0 = byte, 1 = short, 2 = long) */
200 0, /* bitsize */
201 FALSE, /* pc_relative */
202 0, /* bitpos */
203 complain_overflow_dont, /* complain_on_overflow */
204 bfd_elf_generic_reloc, /* special_function */
205 "R_VAX_COPY", /* name */
206 FALSE, /* partial_inplace */
207 0, /* src_mask */
208 0xffffffff, /* dst_mask */
209 FALSE), /* pcrel_offset */
210
211 HOWTO (R_VAX_GLOB_DAT, /* type */
212 0, /* rightshift */
213 2, /* size (0 = byte, 1 = short, 2 = long) */
214 32, /* bitsize */
215 FALSE, /* pc_relative */
216 0, /* bitpos */
217 complain_overflow_dont, /* complain_on_overflow */
218 bfd_elf_generic_reloc, /* special_function */
219 "R_VAX_GLOB_DAT", /* name */
220 FALSE, /* partial_inplace */
221 0, /* src_mask */
222 0xffffffff, /* dst_mask */
223 FALSE), /* pcrel_offset */
224
225 HOWTO (R_VAX_JMP_SLOT, /* type */
226 0, /* rightshift */
227 2, /* size (0 = byte, 1 = short, 2 = long) */
228 32, /* bitsize */
229 FALSE, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_dont, /* complain_on_overflow */
232 bfd_elf_generic_reloc, /* special_function */
233 "R_VAX_JMP_SLOT", /* name */
234 FALSE, /* partial_inplace */
235 0, /* src_mask */
236 0xffffffff, /* dst_mask */
237 FALSE), /* pcrel_offset */
238
239 HOWTO (R_VAX_RELATIVE, /* type */
240 0, /* rightshift */
241 2, /* size (0 = byte, 1 = short, 2 = long) */
242 32, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_dont, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_VAX_RELATIVE", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffffffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* GNU extension to record C++ vtable hierarchy */
254 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
255 0, /* rightshift */
256 2, /* size (0 = byte, 1 = short, 2 = long) */
257 0, /* bitsize */
258 FALSE, /* pc_relative */
259 0, /* bitpos */
260 complain_overflow_dont, /* complain_on_overflow */
261 NULL, /* special_function */
262 "R_VAX_GNU_VTINHERIT", /* name */
263 FALSE, /* partial_inplace */
264 0, /* src_mask */
265 0, /* dst_mask */
266 FALSE), /* pcrel_offset */
267
268 /* GNU extension to record C++ vtable member usage */
269 HOWTO (R_VAX_GNU_VTENTRY, /* type */
270 0, /* rightshift */
271 2, /* size (0 = byte, 1 = short, 2 = long) */
272 0, /* bitsize */
273 FALSE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
277 "R_VAX_GNU_VTENTRY", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0, /* dst_mask */
281 FALSE), /* pcrel_offset */
282 };
283
284 static void
285 rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
286 Elf_Internal_Rela *dst)
287 {
288 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
289 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
290 }
291
292 #define elf_info_to_howto rtype_to_howto
293
294 static const struct
295 {
296 bfd_reloc_code_real_type bfd_val;
297 int elf_val;
298 } reloc_map[] = {
299 { BFD_RELOC_NONE, R_VAX_NONE },
300 { BFD_RELOC_32, R_VAX_32 },
301 { BFD_RELOC_16, R_VAX_16 },
302 { BFD_RELOC_8, R_VAX_8 },
303 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
304 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
305 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
306 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
307 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
308 { BFD_RELOC_NONE, R_VAX_COPY },
309 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
310 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
311 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
312 { BFD_RELOC_CTOR, R_VAX_32 },
313 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
314 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
315 };
316
317 static reloc_howto_type *
318 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
319 {
320 unsigned int i;
321 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
322 {
323 if (reloc_map[i].bfd_val == code)
324 return &howto_table[reloc_map[i].elf_val];
325 }
326 return 0;
327 }
328
329 static reloc_howto_type *
330 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
331 const char *r_name)
332 {
333 unsigned int i;
334
335 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
336 if (howto_table[i].name != NULL
337 && strcasecmp (howto_table[i].name, r_name) == 0)
338 return &howto_table[i];
339
340 return NULL;
341 }
342
343 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
344 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
345 #define ELF_ARCH bfd_arch_vax
346 /* end code generated by elf.el */
347 \f
348 /* Functions for the VAX ELF linker. */
349
350 /* The name of the dynamic interpreter. This is put in the .interp
351 section. */
352
353 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
354
355 /* The size in bytes of an entry in the procedure linkage table. */
356
357 #define PLT_ENTRY_SIZE 12
358
359 /* The first entry in a procedure linkage table looks like this. See
360 the SVR4 ABI VAX supplement to see how this works. */
361
362 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
363 {
364 0xdd, 0xef, /* pushl l^ */
365 0, 0, 0, 0, /* offset to .plt.got + 4 */
366 0x17, 0xff, /* jmp @L^(pc) */
367 0, 0, 0, 0, /* offset to .plt.got + 8 */
368 };
369
370 /* Subsequent entries in a procedure linkage table look like this. */
371
372 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
373 {
374 0xfc, 0x0f, /* .word ^M<r11:r2> */
375 0x16, 0xef, /* jsb L^(pc) */
376 0, 0, 0, 0, /* replaced with offset to start of .plt */
377 0, 0, 0, 0, /* index into .rela.plt */
378 };
379
380 /* The VAX linker needs to keep track of the number of relocs that it
381 decides to copy in check_relocs for each symbol. This is so that it
382 can discard PC relative relocs if it doesn't need them when linking
383 with -Bsymbolic. We store the information in a field extending the
384 regular ELF linker hash table. */
385
386 /* This structure keeps track of the number of PC relative relocs we have
387 copied for a given symbol. */
388
389 struct elf_vax_pcrel_relocs_copied
390 {
391 /* Next section. */
392 struct elf_vax_pcrel_relocs_copied *next;
393 /* A section in dynobj. */
394 asection *section;
395 /* Number of relocs copied in this section. */
396 bfd_size_type count;
397 };
398
399 /* VAX ELF linker hash entry. */
400
401 struct elf_vax_link_hash_entry
402 {
403 struct elf_link_hash_entry root;
404
405 /* Number of PC relative relocs copied for this symbol. */
406 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
407
408 bfd_vma got_addend;
409 };
410
411 /* Declare this now that the above structures are defined. */
412
413 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
414 void *);
415
416 /* Declare this now that the above structures are defined. */
417
418 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
419 void *);
420
421 /* Traverse an VAX ELF linker hash table. */
422
423 #define elf_vax_link_hash_traverse(table, func, info) \
424 (elf_link_hash_traverse \
425 ((table), \
426 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
427 (info)))
428
429 /* Create an entry in an VAX ELF linker hash table. */
430
431 static struct bfd_hash_entry *
432 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
433 struct bfd_hash_table *table,
434 const char *string)
435 {
436 struct elf_vax_link_hash_entry *ret =
437 (struct elf_vax_link_hash_entry *) entry;
438
439 /* Allocate the structure if it has not already been allocated by a
440 subclass. */
441 if (ret == NULL)
442 ret = ((struct elf_vax_link_hash_entry *)
443 bfd_hash_allocate (table,
444 sizeof (struct elf_vax_link_hash_entry)));
445 if (ret == NULL)
446 return (struct bfd_hash_entry *) ret;
447
448 /* Call the allocation method of the superclass. */
449 ret = ((struct elf_vax_link_hash_entry *)
450 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
451 table, string));
452 if (ret != NULL)
453 {
454 ret->pcrel_relocs_copied = NULL;
455 }
456
457 return (struct bfd_hash_entry *) ret;
458 }
459
460 /* Create an VAX ELF linker hash table. */
461
462 static struct bfd_link_hash_table *
463 elf_vax_link_hash_table_create (bfd *abfd)
464 {
465 struct elf_link_hash_table *ret;
466 bfd_size_type amt = sizeof (struct elf_link_hash_table);
467
468 ret = bfd_zmalloc (amt);
469 if (ret == NULL)
470 return NULL;
471
472 if (!_bfd_elf_link_hash_table_init (ret, abfd,
473 elf_vax_link_hash_newfunc,
474 sizeof (struct elf_vax_link_hash_entry),
475 GENERIC_ELF_DATA))
476 {
477 free (ret);
478 return NULL;
479 }
480
481 return &ret->root;
482 }
483
484 /* Keep vax-specific flags in the ELF header */
485 static bfd_boolean
486 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
487 {
488 elf_elfheader (abfd)->e_flags = flags;
489 elf_flags_init (abfd) = TRUE;
490 return TRUE;
491 }
492
493 /* Merge backend specific data from an object file to the output
494 object file when linking. */
495 static bfd_boolean
496 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
497 {
498 flagword in_flags;
499
500 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
501 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
502 return TRUE;
503
504 in_flags = elf_elfheader (ibfd)->e_flags;
505
506 if (!elf_flags_init (obfd))
507 {
508 elf_flags_init (obfd) = TRUE;
509 elf_elfheader (obfd)->e_flags = in_flags;
510 }
511
512 return TRUE;
513 }
514
515 /* Display the flags field */
516 static bfd_boolean
517 elf32_vax_print_private_bfd_data (bfd *abfd, void * ptr)
518 {
519 FILE *file = (FILE *) ptr;
520
521 BFD_ASSERT (abfd != NULL && ptr != NULL);
522
523 /* Print normal ELF private data. */
524 _bfd_elf_print_private_bfd_data (abfd, ptr);
525
526 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
527
528 /* xgettext:c-format */
529 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
530
531 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
532 fprintf (file, _(" [nonpic]"));
533
534 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
535 fprintf (file, _(" [d-float]"));
536
537 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
538 fprintf (file, _(" [g-float]"));
539
540 fputc ('\n', file);
541
542 return TRUE;
543 }
544 /* Look through the relocs for a section during the first phase, and
545 allocate space in the global offset table or procedure linkage
546 table. */
547
548 static bfd_boolean
549 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
550 const Elf_Internal_Rela *relocs)
551 {
552 bfd *dynobj;
553 Elf_Internal_Shdr *symtab_hdr;
554 struct elf_link_hash_entry **sym_hashes;
555 const Elf_Internal_Rela *rel;
556 const Elf_Internal_Rela *rel_end;
557 asection *sgot;
558 asection *srelgot;
559 asection *sreloc;
560
561 if (info->relocatable)
562 return TRUE;
563
564 dynobj = elf_hash_table (info)->dynobj;
565 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
566 sym_hashes = elf_sym_hashes (abfd);
567
568 sgot = NULL;
569 srelgot = NULL;
570 sreloc = NULL;
571
572 rel_end = relocs + sec->reloc_count;
573 for (rel = relocs; rel < rel_end; rel++)
574 {
575 unsigned long r_symndx;
576 struct elf_link_hash_entry *h;
577
578 r_symndx = ELF32_R_SYM (rel->r_info);
579
580 if (r_symndx < symtab_hdr->sh_info)
581 h = NULL;
582 else
583 {
584 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
585 while (h->root.type == bfd_link_hash_indirect
586 || h->root.type == bfd_link_hash_warning)
587 h = (struct elf_link_hash_entry *) h->root.u.i.link;
588
589 /* PR15323, ref flags aren't set for references in the same
590 object. */
591 h->root.non_ir_ref = 1;
592 }
593
594 switch (ELF32_R_TYPE (rel->r_info))
595 {
596 case R_VAX_GOT32:
597 BFD_ASSERT (h != NULL);
598 if (h->forced_local
599 || h == elf_hash_table (info)->hgot
600 || h == elf_hash_table (info)->hplt)
601 break;
602
603 /* If this is a local symbol, we resolve it directly without
604 creating a global offset table entry. */
605 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
606 break;
607
608 /* This symbol requires a global offset table entry. */
609
610 if (dynobj == NULL)
611 {
612 /* Create the .got section. */
613 elf_hash_table (info)->dynobj = dynobj = abfd;
614 if (!_bfd_elf_create_got_section (dynobj, info))
615 return FALSE;
616 }
617
618 if (sgot == NULL)
619 {
620 sgot = bfd_get_linker_section (dynobj, ".got");
621 BFD_ASSERT (sgot != NULL);
622 }
623
624 if (srelgot == NULL
625 && (h != NULL || info->shared))
626 {
627 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
628 if (srelgot == NULL)
629 {
630 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
631 | SEC_IN_MEMORY | SEC_LINKER_CREATED
632 | SEC_READONLY);
633
634 srelgot = bfd_make_section_anyway_with_flags (dynobj,
635 ".rela.got",
636 flags);
637 if (srelgot == NULL
638 || !bfd_set_section_alignment (dynobj, srelgot, 2))
639 return FALSE;
640 }
641 }
642
643 if (h != NULL)
644 {
645 struct elf_vax_link_hash_entry *eh;
646
647 eh = (struct elf_vax_link_hash_entry *) h;
648 if (h->got.refcount == -1)
649 {
650 h->got.refcount = 1;
651 eh->got_addend = rel->r_addend;
652 }
653 else
654 {
655 h->got.refcount++;
656 if (eh->got_addend != (bfd_vma) rel->r_addend)
657 (*_bfd_error_handler)
658 (_("%s: warning: GOT addend of %ld to `%s' does"
659 " not match previous GOT addend of %ld"),
660 bfd_get_filename (abfd), rel->r_addend,
661 h->root.root.string,
662 eh->got_addend);
663
664 }
665 }
666 break;
667
668 case R_VAX_PLT32:
669 /* This symbol requires a procedure linkage table entry. We
670 actually build the entry in adjust_dynamic_symbol,
671 because this might be a case of linking PIC code which is
672 never referenced by a dynamic object, in which case we
673 don't need to generate a procedure linkage table entry
674 after all. */
675
676 /* If this is a local symbol, we resolve it directly without
677 creating a procedure linkage table entry. */
678 BFD_ASSERT (h != NULL);
679 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT || h->forced_local)
680 break;
681
682 h->needs_plt = 1;
683 if (h->plt.refcount == -1)
684 h->plt.refcount = 1;
685 else
686 h->plt.refcount++;
687 break;
688
689 case R_VAX_PC8:
690 case R_VAX_PC16:
691 case R_VAX_PC32:
692 /* If we are creating a shared library and this is not a local
693 symbol, we need to copy the reloc into the shared library.
694 However when linking with -Bsymbolic and this is a global
695 symbol which is defined in an object we are including in the
696 link (i.e., DEF_REGULAR is set), then we can resolve the
697 reloc directly. At this point we have not seen all the input
698 files, so it is possible that DEF_REGULAR is not set now but
699 will be set later (it is never cleared). We account for that
700 possibility below by storing information in the
701 pcrel_relocs_copied field of the hash table entry. */
702 if (!(info->shared
703 && (sec->flags & SEC_ALLOC) != 0
704 && h != NULL
705 && (!info->symbolic
706 || !h->def_regular)))
707 {
708 if (h != NULL
709 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
710 && !h->forced_local)
711 {
712 /* Make sure a plt entry is created for this symbol if
713 it turns out to be a function defined by a dynamic
714 object. */
715 if (h->plt.refcount == -1)
716 h->plt.refcount = 1;
717 else
718 h->plt.refcount++;
719 }
720 break;
721 }
722 /* If this is a local symbol, we can resolve it directly. */
723 if (h != NULL
724 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
725 || h->forced_local))
726 break;
727
728 /* Fall through. */
729 case R_VAX_8:
730 case R_VAX_16:
731 case R_VAX_32:
732 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
733 {
734 /* Make sure a plt entry is created for this symbol if it
735 turns out to be a function defined by a dynamic object. */
736 if (h->plt.refcount == -1)
737 h->plt.refcount = 1;
738 else
739 h->plt.refcount++;
740 }
741
742 /* If we are creating a shared library, we need to copy the
743 reloc into the shared library. */
744 if (info->shared
745 && (sec->flags & SEC_ALLOC) != 0)
746 {
747 /* When creating a shared object, we must copy these
748 reloc types into the output file. We create a reloc
749 section in dynobj and make room for this reloc. */
750 if (sreloc == NULL)
751 {
752 sreloc = _bfd_elf_make_dynamic_reloc_section
753 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
754
755 if (sreloc == NULL)
756 return FALSE;
757
758 if (sec->flags & SEC_READONLY)
759 info->flags |= DF_TEXTREL;
760 }
761
762 sreloc->size += sizeof (Elf32_External_Rela);
763
764 /* If we are linking with -Bsymbolic, we count the number of
765 PC relative relocations we have entered for this symbol,
766 so that we can discard them again if the symbol is later
767 defined by a regular object. Note that this function is
768 only called if we are using a vaxelf linker hash table,
769 which means that h is really a pointer to an
770 elf_vax_link_hash_entry. */
771 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
772 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
773 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
774 && info->symbolic)
775 {
776 struct elf_vax_link_hash_entry *eh;
777 struct elf_vax_pcrel_relocs_copied *p;
778
779 eh = (struct elf_vax_link_hash_entry *) h;
780
781 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
782 if (p->section == sreloc)
783 break;
784
785 if (p == NULL)
786 {
787 p = ((struct elf_vax_pcrel_relocs_copied *)
788 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
789 if (p == NULL)
790 return FALSE;
791 p->next = eh->pcrel_relocs_copied;
792 eh->pcrel_relocs_copied = p;
793 p->section = sreloc;
794 p->count = 0;
795 }
796
797 ++p->count;
798 }
799 }
800
801 break;
802
803 /* This relocation describes the C++ object vtable hierarchy.
804 Reconstruct it for later use during GC. */
805 case R_VAX_GNU_VTINHERIT:
806 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
807 return FALSE;
808 break;
809
810 /* This relocation describes which C++ vtable entries are actually
811 used. Record for later use during GC. */
812 case R_VAX_GNU_VTENTRY:
813 BFD_ASSERT (h != NULL);
814 if (h != NULL
815 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
816 return FALSE;
817 break;
818
819 default:
820 break;
821 }
822 }
823
824 return TRUE;
825 }
826
827 /* Return the section that should be marked against GC for a given
828 relocation. */
829
830 static asection *
831 elf_vax_gc_mark_hook (asection *sec,
832 struct bfd_link_info *info,
833 Elf_Internal_Rela *rel,
834 struct elf_link_hash_entry *h,
835 Elf_Internal_Sym *sym)
836 {
837 if (h != NULL)
838 switch (ELF32_R_TYPE (rel->r_info))
839 {
840 case R_VAX_GNU_VTINHERIT:
841 case R_VAX_GNU_VTENTRY:
842 return NULL;
843 }
844
845 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
846 }
847
848 /* Update the got entry reference counts for the section being removed. */
849
850 static bfd_boolean
851 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
852 const Elf_Internal_Rela *relocs)
853 {
854 Elf_Internal_Shdr *symtab_hdr;
855 struct elf_link_hash_entry **sym_hashes;
856 const Elf_Internal_Rela *rel, *relend;
857 bfd *dynobj;
858
859 if (info->relocatable)
860 return TRUE;
861
862 dynobj = elf_hash_table (info)->dynobj;
863 if (dynobj == NULL)
864 return TRUE;
865
866 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
867 sym_hashes = elf_sym_hashes (abfd);
868
869 relend = relocs + sec->reloc_count;
870 for (rel = relocs; rel < relend; rel++)
871 {
872 unsigned long r_symndx;
873 struct elf_link_hash_entry *h = NULL;
874
875 r_symndx = ELF32_R_SYM (rel->r_info);
876 if (r_symndx >= symtab_hdr->sh_info)
877 {
878 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
879 while (h->root.type == bfd_link_hash_indirect
880 || h->root.type == bfd_link_hash_warning)
881 h = (struct elf_link_hash_entry *) h->root.u.i.link;
882 }
883
884 switch (ELF32_R_TYPE (rel->r_info))
885 {
886 case R_VAX_GOT32:
887 if (h != NULL && h->got.refcount > 0)
888 --h->got.refcount;
889 break;
890
891 case R_VAX_PLT32:
892 case R_VAX_PC8:
893 case R_VAX_PC16:
894 case R_VAX_PC32:
895 case R_VAX_8:
896 case R_VAX_16:
897 case R_VAX_32:
898 if (h != NULL && h->plt.refcount > 0)
899 --h->plt.refcount;
900 break;
901
902 default:
903 break;
904 }
905 }
906
907 return TRUE;
908 }
909
910 /* Adjust a symbol defined by a dynamic object and referenced by a
911 regular object. The current definition is in some section of the
912 dynamic object, but we're not including those sections. We have to
913 change the definition to something the rest of the link can
914 understand. */
915
916 static bfd_boolean
917 elf_vax_adjust_dynamic_symbol (struct bfd_link_info *info,
918 struct elf_link_hash_entry *h)
919 {
920 bfd *dynobj;
921 asection *s;
922
923 dynobj = elf_hash_table (info)->dynobj;
924
925 /* Make sure we know what is going on here. */
926 BFD_ASSERT (dynobj != NULL
927 && (h->needs_plt
928 || h->u.weakdef != NULL
929 || (h->def_dynamic
930 && h->ref_regular
931 && !h->def_regular)));
932
933 /* If this is a function, put it in the procedure linkage table. We
934 will fill in the contents of the procedure linkage table later,
935 when we know the address of the .got section. */
936 if (h->type == STT_FUNC
937 || h->needs_plt)
938 {
939 if (h->plt.refcount <= 0
940 || SYMBOL_CALLS_LOCAL (info, h)
941 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
942 && h->root.type == bfd_link_hash_undefweak))
943 {
944 /* This case can occur if we saw a PLTxx reloc in an input
945 file, but the symbol was never referred to by a dynamic
946 object, or if all references were garbage collected. In
947 such a case, we don't actually need to build a procedure
948 linkage table, and we can just do a PCxx reloc instead. */
949 h->plt.offset = (bfd_vma) -1;
950 h->needs_plt = 0;
951 return TRUE;
952 }
953
954 s = bfd_get_linker_section (dynobj, ".plt");
955 BFD_ASSERT (s != NULL);
956
957 /* If this is the first .plt entry, make room for the special
958 first entry. */
959 if (s->size == 0)
960 {
961 s->size += PLT_ENTRY_SIZE;
962 }
963
964 /* If this symbol is not defined in a regular file, and we are
965 not generating a shared library, then set the symbol to this
966 location in the .plt. This is required to make function
967 pointers compare as equal between the normal executable and
968 the shared library. */
969 if (!info->shared
970 && !h->def_regular)
971 {
972 h->root.u.def.section = s;
973 h->root.u.def.value = s->size;
974 }
975
976 h->plt.offset = s->size;
977
978 /* Make room for this entry. */
979 s->size += PLT_ENTRY_SIZE;
980
981 /* We also need to make an entry in the .got.plt section, which
982 will be placed in the .got section by the linker script. */
983
984 s = bfd_get_linker_section (dynobj, ".got.plt");
985 BFD_ASSERT (s != NULL);
986 s->size += 4;
987
988 /* We also need to make an entry in the .rela.plt section. */
989
990 s = bfd_get_linker_section (dynobj, ".rela.plt");
991 BFD_ASSERT (s != NULL);
992 s->size += sizeof (Elf32_External_Rela);
993
994 return TRUE;
995 }
996
997 /* Reinitialize the plt offset now that it is not used as a reference
998 count any more. */
999 h->plt.offset = (bfd_vma) -1;
1000
1001 /* If this is a weak symbol, and there is a real definition, the
1002 processor independent code will have arranged for us to see the
1003 real definition first, and we can just use the same value. */
1004 if (h->u.weakdef != NULL)
1005 {
1006 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1007 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1008 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1009 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1010 return TRUE;
1011 }
1012
1013 /* This is a reference to a symbol defined by a dynamic object which
1014 is not a function. */
1015
1016 /* If we are creating a shared library, we must presume that the
1017 only references to the symbol are via the global offset table.
1018 For such cases we need not do anything here; the relocations will
1019 be handled correctly by relocate_section. */
1020 if (info->shared)
1021 return TRUE;
1022
1023 /* We must allocate the symbol in our .dynbss section, which will
1024 become part of the .bss section of the executable. There will be
1025 an entry for this symbol in the .dynsym section. The dynamic
1026 object will contain position independent code, so all references
1027 from the dynamic object to this symbol will go through the global
1028 offset table. The dynamic linker will use the .dynsym entry to
1029 determine the address it must put in the global offset table, so
1030 both the dynamic object and the regular object will refer to the
1031 same memory location for the variable. */
1032
1033 s = bfd_get_linker_section (dynobj, ".dynbss");
1034 BFD_ASSERT (s != NULL);
1035
1036 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1037 copy the initial value out of the dynamic object and into the
1038 runtime process image. We need to remember the offset into the
1039 .rela.bss section we are going to use. */
1040 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1041 {
1042 asection *srel;
1043
1044 srel = bfd_get_linker_section (dynobj, ".rela.bss");
1045 BFD_ASSERT (srel != NULL);
1046 srel->size += sizeof (Elf32_External_Rela);
1047 h->needs_copy = 1;
1048 }
1049
1050 return _bfd_elf_adjust_dynamic_copy (h, s);
1051 }
1052
1053 /* Set the sizes of the dynamic sections. */
1054
1055 static bfd_boolean
1056 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1057 {
1058 bfd *dynobj;
1059 asection *s;
1060 bfd_boolean plt;
1061 bfd_boolean relocs;
1062 bfd_boolean reltext;
1063
1064 dynobj = elf_hash_table (info)->dynobj;
1065 BFD_ASSERT (dynobj != NULL);
1066
1067 if (elf_hash_table (info)->dynamic_sections_created)
1068 {
1069 /* Set the contents of the .interp section to the interpreter. */
1070 if (info->executable)
1071 {
1072 s = bfd_get_linker_section (dynobj, ".interp");
1073 BFD_ASSERT (s != NULL);
1074 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1075 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1076 }
1077 }
1078 else
1079 {
1080 /* We may have created entries in the .rela.got and .got sections.
1081 However, if we are not creating the dynamic sections, we will
1082 not actually use these entries. Reset the size of .rela.got
1083 and .got, which will cause it to get stripped from the output
1084 file below. */
1085 s = bfd_get_linker_section (dynobj, ".rela.got");
1086 if (s != NULL)
1087 s->size = 0;
1088 s = bfd_get_linker_section (dynobj, ".got.plt");
1089 if (s != NULL)
1090 s->size = 0;
1091 s = bfd_get_linker_section (dynobj, ".got");
1092 if (s != NULL)
1093 s->size = 0;
1094 }
1095
1096 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1097 relative relocs against symbols defined in a regular object. We
1098 allocated space for them in the check_relocs routine, but we will not
1099 fill them in in the relocate_section routine. */
1100 if (info->shared && info->symbolic)
1101 elf_vax_link_hash_traverse (elf_hash_table (info),
1102 elf_vax_discard_copies,
1103 NULL);
1104
1105 /* If this is a -Bsymbolic shared link or a static link, we need to
1106 discard all the got entries we've recorded. Otherwise, we need to
1107 instantiate (allocate space for them). */
1108 elf_link_hash_traverse (elf_hash_table (info),
1109 elf_vax_instantiate_got_entries,
1110 info);
1111
1112 /* The check_relocs and adjust_dynamic_symbol entry points have
1113 determined the sizes of the various dynamic sections. Allocate
1114 memory for them. */
1115 plt = FALSE;
1116 relocs = FALSE;
1117 reltext = FALSE;
1118 for (s = dynobj->sections; s != NULL; s = s->next)
1119 {
1120 const char *name;
1121
1122 if ((s->flags & SEC_LINKER_CREATED) == 0)
1123 continue;
1124
1125 /* It's OK to base decisions on the section name, because none
1126 of the dynobj section names depend upon the input files. */
1127 name = bfd_get_section_name (dynobj, s);
1128
1129 if (strcmp (name, ".plt") == 0)
1130 {
1131 /* Remember whether there is a PLT. */
1132 plt = s->size != 0;
1133 }
1134 else if (CONST_STRNEQ (name, ".rela"))
1135 {
1136 if (s->size != 0)
1137 {
1138 asection *target;
1139
1140 /* Remember whether there are any reloc sections other
1141 than .rela.plt. */
1142 if (strcmp (name, ".rela.plt") != 0)
1143 {
1144 const char *outname;
1145
1146 relocs = TRUE;
1147
1148 /* If this relocation section applies to a read only
1149 section, then we probably need a DT_TEXTREL
1150 entry. .rela.plt is actually associated with
1151 .got.plt, which is never readonly. */
1152 outname = bfd_get_section_name (output_bfd,
1153 s->output_section);
1154 target = bfd_get_section_by_name (output_bfd, outname + 5);
1155 if (target != NULL
1156 && (target->flags & SEC_READONLY) != 0
1157 && (target->flags & SEC_ALLOC) != 0)
1158 reltext = TRUE;
1159 }
1160
1161 /* We use the reloc_count field as a counter if we need
1162 to copy relocs into the output file. */
1163 s->reloc_count = 0;
1164 }
1165 }
1166 else if (! CONST_STRNEQ (name, ".got")
1167 && strcmp (name, ".dynbss") != 0)
1168 {
1169 /* It's not one of our sections, so don't allocate space. */
1170 continue;
1171 }
1172
1173 if (s->size == 0)
1174 {
1175 /* If we don't need this section, strip it from the
1176 output file. This is mostly to handle .rela.bss and
1177 .rela.plt. We must create both sections in
1178 create_dynamic_sections, because they must be created
1179 before the linker maps input sections to output
1180 sections. The linker does that before
1181 adjust_dynamic_symbol is called, and it is that
1182 function which decides whether anything needs to go
1183 into these sections. */
1184 s->flags |= SEC_EXCLUDE;
1185 continue;
1186 }
1187
1188 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1189 continue;
1190
1191 /* Allocate memory for the section contents. */
1192 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1193 if (s->contents == NULL)
1194 return FALSE;
1195 }
1196
1197 if (elf_hash_table (info)->dynamic_sections_created)
1198 {
1199 /* Add some entries to the .dynamic section. We fill in the
1200 values later, in elf_vax_finish_dynamic_sections, but we
1201 must add the entries now so that we get the correct size for
1202 the .dynamic section. The DT_DEBUG entry is filled in by the
1203 dynamic linker and used by the debugger. */
1204 #define add_dynamic_entry(TAG, VAL) \
1205 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1206
1207 if (!info->shared)
1208 {
1209 if (!add_dynamic_entry (DT_DEBUG, 0))
1210 return FALSE;
1211 }
1212
1213 if (plt)
1214 {
1215 if (!add_dynamic_entry (DT_PLTGOT, 0)
1216 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1217 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1218 || !add_dynamic_entry (DT_JMPREL, 0))
1219 return FALSE;
1220 }
1221
1222 if (relocs)
1223 {
1224 if (!add_dynamic_entry (DT_RELA, 0)
1225 || !add_dynamic_entry (DT_RELASZ, 0)
1226 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1227 return FALSE;
1228 }
1229
1230 if (reltext || (info->flags & DF_TEXTREL) != 0)
1231 {
1232 if (!add_dynamic_entry (DT_TEXTREL, 0))
1233 return FALSE;
1234 }
1235 }
1236 #undef add_dynamic_entry
1237
1238 return TRUE;
1239 }
1240
1241 /* This function is called via elf_vax_link_hash_traverse if we are
1242 creating a shared object with -Bsymbolic. It discards the space
1243 allocated to copy PC relative relocs against symbols which are defined
1244 in regular objects. We allocated space for them in the check_relocs
1245 routine, but we won't fill them in in the relocate_section routine. */
1246
1247 static bfd_boolean
1248 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1249 void * ignore ATTRIBUTE_UNUSED)
1250 {
1251 struct elf_vax_pcrel_relocs_copied *s;
1252
1253 /* We only discard relocs for symbols defined in a regular object. */
1254 if (!h->root.def_regular)
1255 return TRUE;
1256
1257 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1258 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1259
1260 return TRUE;
1261 }
1262
1263 /* This function is called via elf_link_hash_traverse. It looks for entries
1264 that have GOT or PLT (.GOT) references. If creating a static object or a
1265 shared object with -Bsymbolic, or the symbol has been forced local, then
1266 it resets the reference count back to -1 so normal PC32 relocation will
1267 be done. Otherwise space in the .got and .rela.got will be reserved for
1268 the symbol. */
1269
1270 static bfd_boolean
1271 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr)
1272 {
1273 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1274 bfd *dynobj;
1275 asection *sgot;
1276 asection *srelgot;
1277
1278 /* We don't care about non-GOT (and non-PLT) entries. */
1279 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1280 return TRUE;
1281
1282 dynobj = elf_hash_table (info)->dynobj;
1283 if (dynobj == NULL)
1284 return TRUE;
1285
1286 sgot = bfd_get_linker_section (dynobj, ".got");
1287 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1288
1289 if (!elf_hash_table (info)->dynamic_sections_created
1290 || (info->shared && info->symbolic)
1291 || h->forced_local)
1292 {
1293 h->got.refcount = -1;
1294 h->plt.refcount = -1;
1295 }
1296 else if (h->got.refcount > 0)
1297 {
1298 bfd_boolean dyn;
1299
1300 /* Make sure this symbol is output as a dynamic symbol. */
1301 if (h->dynindx == -1)
1302 {
1303 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1304 return FALSE;
1305 }
1306
1307 dyn = elf_hash_table (info)->dynamic_sections_created;
1308 /* Allocate space in the .got and .rela.got sections. */
1309 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1310 && (info->shared
1311 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1312 {
1313 sgot->size += 4;
1314 srelgot->size += sizeof (Elf32_External_Rela);
1315 }
1316 }
1317
1318 return TRUE;
1319 }
1320
1321 /* Relocate an VAX ELF section. */
1322
1323 static bfd_boolean
1324 elf_vax_relocate_section (bfd *output_bfd,
1325 struct bfd_link_info *info,
1326 bfd *input_bfd,
1327 asection *input_section,
1328 bfd_byte *contents,
1329 Elf_Internal_Rela *relocs,
1330 Elf_Internal_Sym *local_syms,
1331 asection **local_sections)
1332 {
1333 bfd *dynobj;
1334 Elf_Internal_Shdr *symtab_hdr;
1335 struct elf_link_hash_entry **sym_hashes;
1336 bfd_vma plt_index;
1337 bfd_vma got_offset;
1338 asection *sgot;
1339 asection *splt;
1340 asection *sgotplt;
1341 asection *sreloc;
1342 Elf_Internal_Rela *rel;
1343 Elf_Internal_Rela *relend;
1344
1345 dynobj = elf_hash_table (info)->dynobj;
1346 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1347 sym_hashes = elf_sym_hashes (input_bfd);
1348
1349 sgot = NULL;
1350 splt = NULL;
1351 sgotplt = NULL;
1352 sreloc = NULL;
1353
1354 rel = relocs;
1355 relend = relocs + input_section->reloc_count;
1356 for (; rel < relend; rel++)
1357 {
1358 int r_type;
1359 reloc_howto_type *howto;
1360 unsigned long r_symndx;
1361 struct elf_link_hash_entry *h;
1362 Elf_Internal_Sym *sym;
1363 asection *sec;
1364 bfd_vma relocation;
1365 bfd_reloc_status_type r;
1366
1367 r_type = ELF32_R_TYPE (rel->r_info);
1368 if (r_type < 0 || r_type >= (int) R_VAX_max)
1369 {
1370 bfd_set_error (bfd_error_bad_value);
1371 return FALSE;
1372 }
1373 howto = howto_table + r_type;
1374
1375 r_symndx = ELF32_R_SYM (rel->r_info);
1376 h = NULL;
1377 sym = NULL;
1378 sec = NULL;
1379 if (r_symndx < symtab_hdr->sh_info)
1380 {
1381 sym = local_syms + r_symndx;
1382 sec = local_sections[r_symndx];
1383 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1384 }
1385 else
1386 {
1387 bfd_boolean unresolved_reloc;
1388 bfd_boolean warned;
1389
1390 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1391 r_symndx, symtab_hdr, sym_hashes,
1392 h, sec, relocation,
1393 unresolved_reloc, warned);
1394
1395 if ((h->root.type == bfd_link_hash_defined
1396 || h->root.type == bfd_link_hash_defweak)
1397 && ((r_type == R_VAX_PLT32
1398 && h->plt.offset != (bfd_vma) -1
1399 && !h->forced_local
1400 && elf_hash_table (info)->dynamic_sections_created)
1401 || (r_type == R_VAX_GOT32
1402 && h->got.offset != (bfd_vma) -1
1403 && !h->forced_local
1404 && elf_hash_table (info)->dynamic_sections_created
1405 && (! info->shared
1406 || (! info->symbolic && h->dynindx != -1)
1407 || !h->def_regular))
1408 || (info->shared
1409 && ((! info->symbolic && h->dynindx != -1)
1410 || !h->def_regular)
1411 && ((input_section->flags & SEC_ALLOC) != 0
1412 /* DWARF will emit R_VAX_32 relocations in its
1413 sections against symbols defined externally
1414 in shared libraries. We can't do anything
1415 with them here. */
1416
1417 || ((input_section->flags & SEC_DEBUGGING) != 0
1418 && h->def_dynamic))
1419 && (r_type == R_VAX_8
1420 || r_type == R_VAX_16
1421 || r_type == R_VAX_32))))
1422 /* In these cases, we don't need the relocation
1423 value. We check specially because in some
1424 obscure cases sec->output_section will be NULL. */
1425 relocation = 0;
1426 }
1427
1428 if (sec != NULL && discarded_section (sec))
1429 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1430 rel, 1, relend, howto, 0, contents);
1431
1432 if (info->relocatable)
1433 continue;
1434
1435 switch (r_type)
1436 {
1437 case R_VAX_GOT32:
1438 /* Relocation is to the address of the entry for this symbol
1439 in the global offset table. */
1440 if (h == NULL
1441 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1442 || h->got.offset == (bfd_vma) -1
1443 || h->forced_local)
1444 break;
1445
1446 /* Relocation is the offset of the entry for this symbol in
1447 the global offset table. */
1448
1449 {
1450 bfd_boolean dyn;
1451 bfd_vma off;
1452
1453 if (sgot == NULL)
1454 {
1455 sgot = bfd_get_linker_section (dynobj, ".got");
1456 BFD_ASSERT (sgot != NULL);
1457 }
1458
1459 BFD_ASSERT (h != NULL);
1460 off = h->got.offset;
1461 BFD_ASSERT (off != (bfd_vma) -1);
1462 BFD_ASSERT (off < sgot->size);
1463
1464 dyn = elf_hash_table (info)->dynamic_sections_created;
1465 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1466 || (info->shared
1467 && SYMBOL_REFERENCES_LOCAL (info, h)))
1468 {
1469 /* The symbol was forced to be local
1470 because of a version file.. We must initialize
1471 this entry in the global offset table. Since
1472 the offset must always be a multiple of 4, we
1473 use the least significant bit to record whether
1474 we have initialized it already.
1475
1476 When doing a dynamic link, we create a .rela.got
1477 relocation entry to initialize the value. This
1478 is done in the finish_dynamic_symbol routine. */
1479 if ((off & 1) != 0)
1480 off &= ~1;
1481 else
1482 {
1483 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1484 sgot->contents + off);
1485 h->got.offset |= 1;
1486 }
1487 } else {
1488 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1489 }
1490
1491 relocation = sgot->output_offset + off;
1492 /* The GOT relocation uses the addend. */
1493 rel->r_addend = 0;
1494
1495 /* Change the reference to be indirect. */
1496 contents[rel->r_offset - 1] |= 0x10;
1497 relocation += sgot->output_section->vma;
1498 }
1499 break;
1500
1501 case R_VAX_PC32:
1502 /* If we are creating an executable and the function this
1503 reloc refers to is in a shared lib, then we made a PLT
1504 entry for this symbol and need to handle the reloc like
1505 a PLT reloc. */
1506 if (info->shared)
1507 goto r_vax_pc32_shared;
1508 /* Fall through. */
1509 case R_VAX_PLT32:
1510 /* Relocation is to the entry for this symbol in the
1511 procedure linkage table. */
1512
1513 /* Resolve a PLTxx reloc against a local symbol directly,
1514 without using the procedure linkage table. */
1515 if (h == NULL
1516 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1517 || h->forced_local)
1518 break;
1519
1520 if (h->plt.offset == (bfd_vma) -1
1521 || !elf_hash_table (info)->dynamic_sections_created)
1522 {
1523 /* We didn't make a PLT entry for this symbol. This
1524 happens when statically linking PIC code, or when
1525 using -Bsymbolic. */
1526 break;
1527 }
1528
1529 if (splt == NULL)
1530 {
1531 splt = bfd_get_linker_section (dynobj, ".plt");
1532 BFD_ASSERT (splt != NULL);
1533 }
1534
1535 if (sgotplt == NULL)
1536 {
1537 sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1538 BFD_ASSERT (sgotplt != NULL);
1539 }
1540
1541 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1542
1543 /* Get the offset into the .got table of the entry that
1544 corresponds to this function. Each .got entry is 4 bytes.
1545 The first two are reserved. */
1546 got_offset = (plt_index + 3) * 4;
1547
1548 /* We want the relocation to point into the .got.plt instead
1549 of the plt itself. */
1550 relocation = (sgotplt->output_section->vma
1551 + sgotplt->output_offset
1552 + got_offset);
1553 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1554 if (rel->r_addend == 2)
1555 {
1556 h->plt.offset |= 1;
1557 }
1558 else if (rel->r_addend != 0)
1559 (*_bfd_error_handler)
1560 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1561 bfd_get_filename (input_bfd), rel->r_addend,
1562 h->root.root.string,
1563 bfd_get_section_name (input_bfd, input_section));
1564 rel->r_addend = 0;
1565
1566 break;
1567
1568 case R_VAX_PC8:
1569 case R_VAX_PC16:
1570 r_vax_pc32_shared:
1571 if (h == NULL
1572 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1573 || h->forced_local)
1574 break;
1575 /* Fall through. */
1576 case R_VAX_8:
1577 case R_VAX_16:
1578 case R_VAX_32:
1579 if (info->shared
1580 && r_symndx != STN_UNDEF
1581 && (input_section->flags & SEC_ALLOC) != 0
1582 && ((r_type != R_VAX_PC8
1583 && r_type != R_VAX_PC16
1584 && r_type != R_VAX_PC32)
1585 || ((input_section->flags & SEC_CODE)
1586 && (!info->symbolic
1587 || (!h->def_regular && h->type != STT_SECTION)))))
1588 {
1589 Elf_Internal_Rela outrel;
1590 bfd_byte *loc;
1591 bfd_boolean skip, relocate;
1592
1593 /* When generating a shared object, these relocations
1594 are copied into the output file to be resolved at run
1595 time. */
1596 if (sreloc == NULL)
1597 {
1598 sreloc = _bfd_elf_get_dynamic_reloc_section
1599 (input_bfd, input_section, /*rela?*/ TRUE);
1600 if (sreloc == NULL)
1601 return FALSE;
1602 }
1603
1604 skip = FALSE;
1605 relocate = FALSE;
1606
1607 outrel.r_offset =
1608 _bfd_elf_section_offset (output_bfd, info, input_section,
1609 rel->r_offset);
1610 if (outrel.r_offset == (bfd_vma) -1)
1611 skip = TRUE;
1612 if (outrel.r_offset == (bfd_vma) -2)
1613 skip = TRUE, relocate = TRUE;
1614 outrel.r_offset += (input_section->output_section->vma
1615 + input_section->output_offset);
1616
1617 if (skip)
1618 memset (&outrel, 0, sizeof outrel);
1619 /* h->dynindx may be -1 if the symbol was marked to
1620 become local. */
1621 else if (h != NULL
1622 && ((! info->symbolic && h->dynindx != -1)
1623 || !h->def_regular))
1624 {
1625 BFD_ASSERT (h->dynindx != -1);
1626 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1627 outrel.r_addend = relocation + rel->r_addend;
1628 }
1629 else
1630 {
1631 if (r_type == R_VAX_32)
1632 {
1633 relocate = TRUE;
1634 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1635 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1636 &contents[rel->r_offset]) == 0);
1637 outrel.r_addend = relocation + rel->r_addend;
1638 }
1639 else
1640 {
1641 long indx;
1642
1643 if (bfd_is_abs_section (sec))
1644 indx = 0;
1645 else if (sec == NULL || sec->owner == NULL)
1646 {
1647 bfd_set_error (bfd_error_bad_value);
1648 return FALSE;
1649 }
1650 else
1651 {
1652 asection *osec;
1653
1654 /* We are turning this relocation into one
1655 against a section symbol. It would be
1656 proper to subtract the symbol's value,
1657 osec->vma, from the emitted reloc addend,
1658 but ld.so expects buggy relocs. */
1659 osec = sec->output_section;
1660 indx = elf_section_data (osec)->dynindx;
1661 if (indx == 0)
1662 {
1663 struct elf_link_hash_table *htab;
1664 htab = elf_hash_table (info);
1665 osec = htab->text_index_section;
1666 indx = elf_section_data (osec)->dynindx;
1667 }
1668 BFD_ASSERT (indx != 0);
1669 }
1670
1671 outrel.r_info = ELF32_R_INFO (indx, r_type);
1672 outrel.r_addend = relocation + rel->r_addend;
1673 }
1674 }
1675
1676 if ((input_section->flags & SEC_CODE) != 0
1677 || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32
1678 && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE
1679 && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY
1680 && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT
1681 && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT))
1682 {
1683 if (h != NULL)
1684 (*_bfd_error_handler)
1685 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1686 bfd_get_filename (input_bfd), howto->name,
1687 h->root.root.string,
1688 bfd_get_section_name (input_bfd, input_section));
1689 else
1690 (*_bfd_error_handler)
1691 (_("%s: warning: %s relocation to 0x%x from %s section"),
1692 bfd_get_filename (input_bfd), howto->name,
1693 outrel.r_addend,
1694 bfd_get_section_name (input_bfd, input_section));
1695 }
1696 loc = sreloc->contents;
1697 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1698 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1699
1700 /* This reloc will be computed at runtime, so there's no
1701 need to do anything now, except for R_VAX_32
1702 relocations that have been turned into
1703 R_VAX_RELATIVE. */
1704 if (!relocate)
1705 continue;
1706 }
1707
1708 break;
1709
1710 case R_VAX_GNU_VTINHERIT:
1711 case R_VAX_GNU_VTENTRY:
1712 /* These are no-ops in the end. */
1713 continue;
1714
1715 default:
1716 break;
1717 }
1718
1719 /* VAX PCREL relocations are from the end of relocation, not the start.
1720 So subtract the difference from the relocation amount since we can't
1721 add it to the offset. */
1722 if (howto->pc_relative && howto->pcrel_offset)
1723 relocation -= bfd_get_reloc_size(howto);
1724
1725 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1726 contents, rel->r_offset,
1727 relocation, rel->r_addend);
1728
1729 if (r != bfd_reloc_ok)
1730 {
1731 switch (r)
1732 {
1733 default:
1734 case bfd_reloc_outofrange:
1735 abort ();
1736 case bfd_reloc_overflow:
1737 {
1738 const char *name;
1739
1740 if (h != NULL)
1741 name = NULL;
1742 else
1743 {
1744 name = bfd_elf_string_from_elf_section (input_bfd,
1745 symtab_hdr->sh_link,
1746 sym->st_name);
1747 if (name == NULL)
1748 return FALSE;
1749 if (*name == '\0')
1750 name = bfd_section_name (input_bfd, sec);
1751 }
1752 if (!(info->callbacks->reloc_overflow
1753 (info, (h ? &h->root : NULL), name, howto->name,
1754 (bfd_vma) 0, input_bfd, input_section,
1755 rel->r_offset)))
1756 return FALSE;
1757 }
1758 break;
1759 }
1760 }
1761 }
1762
1763 return TRUE;
1764 }
1765
1766 /* Finish up dynamic symbol handling. We set the contents of various
1767 dynamic sections here. */
1768
1769 static bfd_boolean
1770 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1771 struct elf_link_hash_entry *h,
1772 Elf_Internal_Sym *sym)
1773 {
1774 bfd *dynobj;
1775
1776 dynobj = elf_hash_table (info)->dynobj;
1777
1778 if (h->plt.offset != (bfd_vma) -1)
1779 {
1780 asection *splt;
1781 asection *sgot;
1782 asection *srela;
1783 bfd_vma plt_index;
1784 bfd_vma got_offset;
1785 bfd_vma addend;
1786 Elf_Internal_Rela rela;
1787 bfd_byte *loc;
1788
1789 /* This symbol has an entry in the procedure linkage table. Set
1790 it up. */
1791 BFD_ASSERT (h->dynindx != -1);
1792
1793 splt = bfd_get_linker_section (dynobj, ".plt");
1794 sgot = bfd_get_linker_section (dynobj, ".got.plt");
1795 srela = bfd_get_linker_section (dynobj, ".rela.plt");
1796 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1797
1798 addend = 2 * (h->plt.offset & 1);
1799 h->plt.offset &= ~1;
1800
1801 /* Get the index in the procedure linkage table which
1802 corresponds to this symbol. This is the index of this symbol
1803 in all the symbols for which we are making plt entries. The
1804 first entry in the procedure linkage table is reserved. */
1805 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1806
1807 /* Get the offset into the .got table of the entry that
1808 corresponds to this function. Each .got entry is 4 bytes.
1809 The first two are reserved. */
1810 got_offset = (plt_index + 3) * 4;
1811
1812 /* Fill in the entry in the procedure linkage table. */
1813 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1814 PLT_ENTRY_SIZE);
1815
1816 /* The offset is relative to the first extension word. */
1817 bfd_put_32 (output_bfd,
1818 -(h->plt.offset + 8),
1819 splt->contents + h->plt.offset + 4);
1820
1821 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1822 splt->contents + h->plt.offset + 8);
1823
1824 /* Fill in the entry in the global offset table. */
1825 bfd_put_32 (output_bfd,
1826 (splt->output_section->vma
1827 + splt->output_offset
1828 + h->plt.offset) + addend,
1829 sgot->contents + got_offset);
1830
1831 /* Fill in the entry in the .rela.plt section. */
1832 rela.r_offset = (sgot->output_section->vma
1833 + sgot->output_offset
1834 + got_offset);
1835 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1836 rela.r_addend = addend;
1837 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1838 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1839
1840 if (!h->def_regular)
1841 {
1842 /* Mark the symbol as undefined, rather than as defined in
1843 the .plt section. Leave the value alone. */
1844 sym->st_shndx = SHN_UNDEF;
1845 }
1846 }
1847
1848 if (h->got.offset != (bfd_vma) -1)
1849 {
1850 asection *sgot;
1851 asection *srela;
1852 Elf_Internal_Rela rela;
1853 bfd_byte *loc;
1854
1855 /* This symbol has an entry in the global offset table. Set it
1856 up. */
1857 sgot = bfd_get_linker_section (dynobj, ".got");
1858 srela = bfd_get_linker_section (dynobj, ".rela.got");
1859 BFD_ASSERT (sgot != NULL && srela != NULL);
1860
1861 rela.r_offset = (sgot->output_section->vma
1862 + sgot->output_offset
1863 + (h->got.offset &~ 1));
1864
1865 /* If the symbol was forced to be local because of a version file
1866 locally we just want to emit a RELATIVE reloc. The entry in
1867 the global offset table will already have been initialized in
1868 the relocate_section function. */
1869 if (info->shared
1870 && h->dynindx == -1
1871 && h->def_regular)
1872 {
1873 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1874 }
1875 else
1876 {
1877 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1878 }
1879 rela.r_addend = bfd_get_signed_32 (output_bfd,
1880 (sgot->contents
1881 + (h->got.offset & ~1)));
1882
1883 loc = srela->contents;
1884 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1885 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1886 }
1887
1888 if (h->needs_copy)
1889 {
1890 asection *s;
1891 Elf_Internal_Rela rela;
1892 bfd_byte *loc;
1893
1894 /* This symbol needs a copy reloc. Set it up. */
1895 BFD_ASSERT (h->dynindx != -1
1896 && (h->root.type == bfd_link_hash_defined
1897 || h->root.type == bfd_link_hash_defweak));
1898
1899 s = bfd_get_linker_section (dynobj, ".rela.bss");
1900 BFD_ASSERT (s != NULL);
1901
1902 rela.r_offset = (h->root.u.def.value
1903 + h->root.u.def.section->output_section->vma
1904 + h->root.u.def.section->output_offset);
1905 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1906 rela.r_addend = 0;
1907 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1908 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1909 }
1910
1911 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1912 if (h == elf_hash_table (info)->hdynamic
1913 || h == elf_hash_table (info)->hgot)
1914 sym->st_shndx = SHN_ABS;
1915
1916 return TRUE;
1917 }
1918
1919 /* Finish up the dynamic sections. */
1920
1921 static bfd_boolean
1922 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1923 {
1924 bfd *dynobj;
1925 asection *sgot;
1926 asection *sdyn;
1927
1928 dynobj = elf_hash_table (info)->dynobj;
1929
1930 sgot = bfd_get_linker_section (dynobj, ".got.plt");
1931 BFD_ASSERT (sgot != NULL);
1932 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
1933
1934 if (elf_hash_table (info)->dynamic_sections_created)
1935 {
1936 asection *splt;
1937 Elf32_External_Dyn *dyncon, *dynconend;
1938
1939 splt = bfd_get_linker_section (dynobj, ".plt");
1940 BFD_ASSERT (splt != NULL && sdyn != NULL);
1941
1942 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1943 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1944 for (; dyncon < dynconend; dyncon++)
1945 {
1946 Elf_Internal_Dyn dyn;
1947 const char *name;
1948 asection *s;
1949
1950 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1951
1952 switch (dyn.d_tag)
1953 {
1954 default:
1955 break;
1956
1957 case DT_PLTGOT:
1958 name = ".got";
1959 goto get_vma;
1960 case DT_JMPREL:
1961 name = ".rela.plt";
1962 get_vma:
1963 s = bfd_get_section_by_name (output_bfd, name);
1964 BFD_ASSERT (s != NULL);
1965 dyn.d_un.d_ptr = s->vma;
1966 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1967 break;
1968
1969 case DT_PLTRELSZ:
1970 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1971 BFD_ASSERT (s != NULL);
1972 dyn.d_un.d_val = s->size;
1973 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1974 break;
1975
1976 case DT_RELASZ:
1977 /* The procedure linkage table relocs (DT_JMPREL) should
1978 not be included in the overall relocs (DT_RELA).
1979 Therefore, we override the DT_RELASZ entry here to
1980 make it not include the JMPREL relocs. Since the
1981 linker script arranges for .rela.plt to follow all
1982 other relocation sections, we don't have to worry
1983 about changing the DT_RELA entry. */
1984 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1985 if (s != NULL)
1986 dyn.d_un.d_val -= s->size;
1987 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1988 break;
1989 }
1990 }
1991
1992 /* Fill in the first entry in the procedure linkage table. */
1993 if (splt->size > 0)
1994 {
1995 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
1996 bfd_put_32 (output_bfd,
1997 (sgot->output_section->vma
1998 + sgot->output_offset + 4
1999 - (splt->output_section->vma + 6)),
2000 splt->contents + 2);
2001 bfd_put_32 (output_bfd,
2002 (sgot->output_section->vma
2003 + sgot->output_offset + 8
2004 - (splt->output_section->vma + 12)),
2005 splt->contents + 8);
2006 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2007 = PLT_ENTRY_SIZE;
2008 }
2009 }
2010
2011 /* Fill in the first three entries in the global offset table. */
2012 if (sgot->size > 0)
2013 {
2014 if (sdyn == NULL)
2015 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2016 else
2017 bfd_put_32 (output_bfd,
2018 sdyn->output_section->vma + sdyn->output_offset,
2019 sgot->contents);
2020 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2021 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2022 }
2023
2024 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2025
2026 return TRUE;
2027 }
2028
2029 static enum elf_reloc_type_class
2030 elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
2031 const asection *rel_sec ATTRIBUTE_UNUSED,
2032 const Elf_Internal_Rela *rela)
2033 {
2034 switch ((int) ELF32_R_TYPE (rela->r_info))
2035 {
2036 case R_VAX_RELATIVE:
2037 return reloc_class_relative;
2038 case R_VAX_JMP_SLOT:
2039 return reloc_class_plt;
2040 case R_VAX_COPY:
2041 return reloc_class_copy;
2042 default:
2043 return reloc_class_normal;
2044 }
2045 }
2046
2047 static bfd_vma
2048 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
2049 const arelent *rel ATTRIBUTE_UNUSED)
2050 {
2051 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
2052 }
2053
2054 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2055 #define TARGET_LITTLE_NAME "elf32-vax"
2056 #define ELF_MACHINE_CODE EM_VAX
2057 #define ELF_MAXPAGESIZE 0x1000
2058
2059 #define elf_backend_create_dynamic_sections \
2060 _bfd_elf_create_dynamic_sections
2061 #define bfd_elf32_bfd_link_hash_table_create \
2062 elf_vax_link_hash_table_create
2063 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2064
2065 #define elf_backend_check_relocs elf_vax_check_relocs
2066 #define elf_backend_adjust_dynamic_symbol \
2067 elf_vax_adjust_dynamic_symbol
2068 #define elf_backend_size_dynamic_sections \
2069 elf_vax_size_dynamic_sections
2070 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2071 #define elf_backend_relocate_section elf_vax_relocate_section
2072 #define elf_backend_finish_dynamic_symbol \
2073 elf_vax_finish_dynamic_symbol
2074 #define elf_backend_finish_dynamic_sections \
2075 elf_vax_finish_dynamic_sections
2076 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2077 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2078 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2079 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2080 #define bfd_elf32_bfd_merge_private_bfd_data \
2081 elf32_vax_merge_private_bfd_data
2082 #define bfd_elf32_bfd_set_private_flags \
2083 elf32_vax_set_private_flags
2084 #define bfd_elf32_bfd_print_private_bfd_data \
2085 elf32_vax_print_private_bfd_data
2086
2087 #define elf_backend_can_gc_sections 1
2088 #define elf_backend_want_got_plt 1
2089 #define elf_backend_plt_readonly 1
2090 #define elf_backend_want_plt_sym 0
2091 #define elf_backend_got_header_size 16
2092 #define elf_backend_rela_normal 1
2093
2094 #include "elf32-target.h"
GDB Binutils - Deliverables
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