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