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* coffgen.c (coff_write_alien_symbol): Don't write
[binutils.git] / bfd / elf32-vax.c
blob643381c5c43b8311f232c272df395e8610c727a1
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
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_section_by_name (dynobj, ".got");
617 BFD_ASSERT (sgot != NULL);
618 }
619
620 if (srelgot == NULL
621 && (h != NULL || info->shared))
622 {
623 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
624 if (srelgot == NULL)
625 {
626 srelgot = bfd_make_section_with_flags (dynobj,
627 ".rela.got",
628 (SEC_ALLOC
629 | SEC_LOAD
630 | SEC_HAS_CONTENTS
631 | SEC_IN_MEMORY
632 | SEC_LINKER_CREATED
633 | SEC_READONLY));
634 if (srelgot == NULL
635 || !bfd_set_section_alignment (dynobj, srelgot, 2))
636 return FALSE;
637 }
638 }
639
640 if (h != NULL)
641 {
642 struct elf_vax_link_hash_entry *eh;
643
644 eh = (struct elf_vax_link_hash_entry *) h;
645 if (h->got.refcount == -1)
646 {
647 h->got.refcount = 1;
648 eh->got_addend = rel->r_addend;
649 }
650 else
651 {
652 h->got.refcount++;
653 if (eh->got_addend != (bfd_vma) rel->r_addend)
654 (*_bfd_error_handler)
655 (_("%s: warning: GOT addend of %ld to `%s' does"
656 " not match previous GOT addend of %ld"),
657 bfd_get_filename (abfd), rel->r_addend,
658 h->root.root.string,
659 eh->got_addend);
660
661 }
662 }
663 break;
664
665 case R_VAX_PLT32:
666 /* This symbol requires a procedure linkage table entry. We
667 actually build the entry in adjust_dynamic_symbol,
668 because this might be a case of linking PIC code which is
669 never referenced by a dynamic object, in which case we
670 don't need to generate a procedure linkage table entry
671 after all. */
672
673 /* If this is a local symbol, we resolve it directly without
674 creating a procedure linkage table entry. */
675 BFD_ASSERT (h != NULL);
676 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT || h->forced_local)
677 break;
678
679 h->needs_plt = 1;
680 if (h->plt.refcount == -1)
681 h->plt.refcount = 1;
682 else
683 h->plt.refcount++;
684 break;
685
686 case R_VAX_PC8:
687 case R_VAX_PC16:
688 case R_VAX_PC32:
689 /* If we are creating a shared library and this is not a local
690 symbol, we need to copy the reloc into the shared library.
691 However when linking with -Bsymbolic and this is a global
692 symbol which is defined in an object we are including in the
693 link (i.e., DEF_REGULAR is set), then we can resolve the
694 reloc directly. At this point we have not seen all the input
695 files, so it is possible that DEF_REGULAR is not set now but
696 will be set later (it is never cleared). We account for that
697 possibility below by storing information in the
698 pcrel_relocs_copied field of the hash table entry. */
699 if (!(info->shared
700 && (sec->flags & SEC_ALLOC) != 0
701 && h != NULL
702 && (!info->symbolic
703 || !h->def_regular)))
704 {
705 if (h != NULL
706 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
707 && !h->forced_local)
708 {
709 /* Make sure a plt entry is created for this symbol if
710 it turns out to be a function defined by a dynamic
711 object. */
712 if (h->plt.refcount == -1)
713 h->plt.refcount = 1;
714 else
715 h->plt.refcount++;
716 }
717 break;
718 }
719 /* If this is a local symbol, we can resolve it directly. */
720 if (h != NULL
721 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
722 || h->forced_local))
723 break;
724
725 /* Fall through. */
726 case R_VAX_8:
727 case R_VAX_16:
728 case R_VAX_32:
729 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
730 {
731 /* Make sure a plt entry is created for this symbol if it
732 turns out to be a function defined by a dynamic object. */
733 if (h->plt.refcount == -1)
734 h->plt.refcount = 1;
735 else
736 h->plt.refcount++;
737 }
738
739 /* If we are creating a shared library, we need to copy the
740 reloc into the shared library. */
741 if (info->shared
742 && (sec->flags & SEC_ALLOC) != 0)
743 {
744 /* When creating a shared object, we must copy these
745 reloc types into the output file. We create a reloc
746 section in dynobj and make room for this reloc. */
747 if (sreloc == NULL)
748 {
749 sreloc = _bfd_elf_make_dynamic_reloc_section
750 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
751
752 if (sreloc == NULL)
753 return FALSE;
754
755 if (sec->flags & SEC_READONLY)
756 info->flags |= DF_TEXTREL;
757 }
758
759 sreloc->size += sizeof (Elf32_External_Rela);
760
761 /* If we are linking with -Bsymbolic, we count the number of
762 PC relative relocations we have entered for this symbol,
763 so that we can discard them again if the symbol is later
764 defined by a regular object. Note that this function is
765 only called if we are using a vaxelf linker hash table,
766 which means that h is really a pointer to an
767 elf_vax_link_hash_entry. */
768 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
769 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
770 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
771 && info->symbolic)
772 {
773 struct elf_vax_link_hash_entry *eh;
774 struct elf_vax_pcrel_relocs_copied *p;
775
776 eh = (struct elf_vax_link_hash_entry *) h;
777
778 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
779 if (p->section == sreloc)
780 break;
781
782 if (p == NULL)
783 {
784 p = ((struct elf_vax_pcrel_relocs_copied *)
785 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
786 if (p == NULL)
787 return FALSE;
788 p->next = eh->pcrel_relocs_copied;
789 eh->pcrel_relocs_copied = p;
790 p->section = sreloc;
791 p->count = 0;
792 }
793
794 ++p->count;
795 }
796 }
797
798 break;
799
800 /* This relocation describes the C++ object vtable hierarchy.
801 Reconstruct it for later use during GC. */
802 case R_VAX_GNU_VTINHERIT:
803 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
804 return FALSE;
805 break;
806
807 /* This relocation describes which C++ vtable entries are actually
808 used. Record for later use during GC. */
809 case R_VAX_GNU_VTENTRY:
810 BFD_ASSERT (h != NULL);
811 if (h != NULL
812 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
813 return FALSE;
814 break;
815
816 default:
817 break;
818 }
819 }
820
821 return TRUE;
822 }
823
824 /* Return the section that should be marked against GC for a given
825 relocation. */
826
827 static asection *
828 elf_vax_gc_mark_hook (asection *sec,
829 struct bfd_link_info *info,
830 Elf_Internal_Rela *rel,
831 struct elf_link_hash_entry *h,
832 Elf_Internal_Sym *sym)
833 {
834 if (h != NULL)
835 switch (ELF32_R_TYPE (rel->r_info))
836 {
837 case R_VAX_GNU_VTINHERIT:
838 case R_VAX_GNU_VTENTRY:
839 return NULL;
840 }
841
842 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
843 }
844
845 /* Update the got entry reference counts for the section being removed. */
846
847 static bfd_boolean
848 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
849 const Elf_Internal_Rela *relocs)
850 {
851 Elf_Internal_Shdr *symtab_hdr;
852 struct elf_link_hash_entry **sym_hashes;
853 const Elf_Internal_Rela *rel, *relend;
854 bfd *dynobj;
855
856 if (info->relocatable)
857 return TRUE;
858
859 dynobj = elf_hash_table (info)->dynobj;
860 if (dynobj == NULL)
861 return TRUE;
862
863 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
864 sym_hashes = elf_sym_hashes (abfd);
865
866 relend = relocs + sec->reloc_count;
867 for (rel = relocs; rel < relend; rel++)
868 {
869 unsigned long r_symndx;
870 struct elf_link_hash_entry *h = NULL;
871
872 r_symndx = ELF32_R_SYM (rel->r_info);
873 if (r_symndx >= symtab_hdr->sh_info)
874 {
875 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
876 while (h->root.type == bfd_link_hash_indirect
877 || h->root.type == bfd_link_hash_warning)
878 h = (struct elf_link_hash_entry *) h->root.u.i.link;
879 }
880
881 switch (ELF32_R_TYPE (rel->r_info))
882 {
883 case R_VAX_GOT32:
884 if (h != NULL && h->got.refcount > 0)
885 --h->got.refcount;
886 break;
887
888 case R_VAX_PLT32:
889 case R_VAX_PC8:
890 case R_VAX_PC16:
891 case R_VAX_PC32:
892 case R_VAX_8:
893 case R_VAX_16:
894 case R_VAX_32:
895 if (h != NULL && h->plt.refcount > 0)
896 --h->plt.refcount;
897 break;
898
899 default:
900 break;
901 }
902 }
903
904 return TRUE;
905 }
906
907 /* Adjust a symbol defined by a dynamic object and referenced by a
908 regular object. The current definition is in some section of the
909 dynamic object, but we're not including those sections. We have to
910 change the definition to something the rest of the link can
911 understand. */
912
913 static bfd_boolean
914 elf_vax_adjust_dynamic_symbol (info, h)
915 struct bfd_link_info *info;
916 struct elf_link_hash_entry *h;
917 {
918 bfd *dynobj;
919 asection *s;
920
921 dynobj = elf_hash_table (info)->dynobj;
922
923 /* Make sure we know what is going on here. */
924 BFD_ASSERT (dynobj != NULL
925 && (h->needs_plt
926 || h->u.weakdef != NULL
927 || (h->def_dynamic
928 && h->ref_regular
929 && !h->def_regular)));
930
931 /* If this is a function, put it in the procedure linkage table. We
932 will fill in the contents of the procedure linkage table later,
933 when we know the address of the .got section. */
934 if (h->type == STT_FUNC
935 || h->needs_plt)
936 {
937 if (! info->shared
938 && !h->def_dynamic
939 && !h->ref_dynamic
940 /* We must always create the plt entry if it was referenced
941 by a PLTxxO relocation. In this case we already recorded
942 it as a dynamic symbol. */
943 && h->dynindx == -1)
944 {
945 /* This case can occur if we saw a PLTxx reloc in an input
946 file, but the symbol was never referred to by a dynamic
947 object. In such a case, we don't actually need to build
948 a procedure linkage table, and we can just do a PCxx
949 reloc instead. */
950 BFD_ASSERT (h->needs_plt);
951 h->plt.offset = (bfd_vma) -1;
952 return TRUE;
953 }
954
955 /* GC may have rendered this entry unused. */
956 if (h->plt.refcount <= 0)
957 {
958 h->needs_plt = 0;
959 h->plt.offset = (bfd_vma) -1;
960 return TRUE;
961 }
962
963 /* Make sure this symbol is output as a dynamic symbol. */
964 if (h->dynindx == -1)
965 {
966 if (! bfd_elf_link_record_dynamic_symbol (info, h))
967 return FALSE;
968 }
969
970 s = bfd_get_section_by_name (dynobj, ".plt");
971 BFD_ASSERT (s != NULL);
972
973 /* If this is the first .plt entry, make room for the special
974 first entry. */
975 if (s->size == 0)
976 {
977 s->size += PLT_ENTRY_SIZE;
978 }
979
980 /* If this symbol is not defined in a regular file, and we are
981 not generating a shared library, then set the symbol to this
982 location in the .plt. This is required to make function
983 pointers compare as equal between the normal executable and
984 the shared library. */
985 if (!info->shared
986 && !h->def_regular)
987 {
988 h->root.u.def.section = s;
989 h->root.u.def.value = s->size;
990 }
991
992 h->plt.offset = s->size;
993
994 /* Make room for this entry. */
995 s->size += PLT_ENTRY_SIZE;
996
997 /* We also need to make an entry in the .got.plt section, which
998 will be placed in the .got section by the linker script. */
999
1000 s = bfd_get_section_by_name (dynobj, ".got.plt");
1001 BFD_ASSERT (s != NULL);
1002 s->size += 4;
1003
1004 /* We also need to make an entry in the .rela.plt section. */
1005
1006 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1007 BFD_ASSERT (s != NULL);
1008 s->size += sizeof (Elf32_External_Rela);
1009
1010 return TRUE;
1011 }
1012
1013 /* Reinitialize the plt offset now that it is not used as a reference
1014 count any more. */
1015 h->plt.offset = (bfd_vma) -1;
1016
1017 /* If this is a weak symbol, and there is a real definition, the
1018 processor independent code will have arranged for us to see the
1019 real definition first, and we can just use the same value. */
1020 if (h->u.weakdef != NULL)
1021 {
1022 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1023 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1024 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1025 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1026 return TRUE;
1027 }
1028
1029 /* This is a reference to a symbol defined by a dynamic object which
1030 is not a function. */
1031
1032 /* If we are creating a shared library, we must presume that the
1033 only references to the symbol are via the global offset table.
1034 For such cases we need not do anything here; the relocations will
1035 be handled correctly by relocate_section. */
1036 if (info->shared)
1037 return TRUE;
1038
1039 if (h->size == 0)
1040 {
1041 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1042 h->root.root.string);
1043 return TRUE;
1044 }
1045
1046 /* We must allocate the symbol in our .dynbss section, which will
1047 become part of the .bss section of the executable. There will be
1048 an entry for this symbol in the .dynsym section. The dynamic
1049 object will contain position independent code, so all references
1050 from the dynamic object to this symbol will go through the global
1051 offset table. The dynamic linker will use the .dynsym entry to
1052 determine the address it must put in the global offset table, so
1053 both the dynamic object and the regular object will refer to the
1054 same memory location for the variable. */
1055
1056 s = bfd_get_section_by_name (dynobj, ".dynbss");
1057 BFD_ASSERT (s != NULL);
1058
1059 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1060 copy the initial value out of the dynamic object and into the
1061 runtime process image. We need to remember the offset into the
1062 .rela.bss section we are going to use. */
1063 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1064 {
1065 asection *srel;
1066
1067 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1068 BFD_ASSERT (srel != NULL);
1069 srel->size += sizeof (Elf32_External_Rela);
1070 h->needs_copy = 1;
1071 }
1072
1073 return _bfd_elf_adjust_dynamic_copy (h, s);
1074 }
1075
1076 /* Set the sizes of the dynamic sections. */
1077
1078 static bfd_boolean
1079 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1080 {
1081 bfd *dynobj;
1082 asection *s;
1083 bfd_boolean plt;
1084 bfd_boolean relocs;
1085 bfd_boolean reltext;
1086
1087 dynobj = elf_hash_table (info)->dynobj;
1088 BFD_ASSERT (dynobj != NULL);
1089
1090 if (elf_hash_table (info)->dynamic_sections_created)
1091 {
1092 /* Set the contents of the .interp section to the interpreter. */
1093 if (info->executable)
1094 {
1095 s = bfd_get_section_by_name (dynobj, ".interp");
1096 BFD_ASSERT (s != NULL);
1097 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1098 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1099 }
1100 }
1101 else
1102 {
1103 /* We may have created entries in the .rela.got and .got sections.
1104 However, if we are not creating the dynamic sections, we will
1105 not actually use these entries. Reset the size of .rela.got
1106 and .got, which will cause it to get stripped from the output
1107 file below. */
1108 s = bfd_get_section_by_name (dynobj, ".rela.got");
1109 if (s != NULL)
1110 s->size = 0;
1111 s = bfd_get_section_by_name (dynobj, ".got.plt");
1112 if (s != NULL)
1113 s->size = 0;
1114 s = bfd_get_section_by_name (dynobj, ".got");
1115 if (s != NULL)
1116 s->size = 0;
1117 }
1118
1119 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1120 relative relocs against symbols defined in a regular object. We
1121 allocated space for them in the check_relocs routine, but we will not
1122 fill them in in the relocate_section routine. */
1123 if (info->shared && info->symbolic)
1124 elf_vax_link_hash_traverse (elf_hash_table (info),
1125 elf_vax_discard_copies,
1126 NULL);
1127
1128 /* If this is a -Bsymbolic shared link or a static link, we need to
1129 discard all the got entries we've recorded. Otherwise, we need to
1130 instantiate (allocate space for them). */
1131 elf_link_hash_traverse (elf_hash_table (info),
1132 elf_vax_instantiate_got_entries,
1133 (PTR) info);
1134
1135 /* The check_relocs and adjust_dynamic_symbol entry points have
1136 determined the sizes of the various dynamic sections. Allocate
1137 memory for them. */
1138 plt = FALSE;
1139 relocs = FALSE;
1140 reltext = FALSE;
1141 for (s = dynobj->sections; s != NULL; s = s->next)
1142 {
1143 const char *name;
1144
1145 if ((s->flags & SEC_LINKER_CREATED) == 0)
1146 continue;
1147
1148 /* It's OK to base decisions on the section name, because none
1149 of the dynobj section names depend upon the input files. */
1150 name = bfd_get_section_name (dynobj, s);
1151
1152 if (strcmp (name, ".plt") == 0)
1153 {
1154 /* Remember whether there is a PLT. */
1155 plt = s->size != 0;
1156 }
1157 else if (CONST_STRNEQ (name, ".rela"))
1158 {
1159 if (s->size != 0)
1160 {
1161 asection *target;
1162
1163 /* Remember whether there are any reloc sections other
1164 than .rela.plt. */
1165 if (strcmp (name, ".rela.plt") != 0)
1166 {
1167 const char *outname;
1168
1169 relocs = TRUE;
1170
1171 /* If this relocation section applies to a read only
1172 section, then we probably need a DT_TEXTREL
1173 entry. .rela.plt is actually associated with
1174 .got.plt, which is never readonly. */
1175 outname = bfd_get_section_name (output_bfd,
1176 s->output_section);
1177 target = bfd_get_section_by_name (output_bfd, outname + 5);
1178 if (target != NULL
1179 && (target->flags & SEC_READONLY) != 0
1180 && (target->flags & SEC_ALLOC) != 0)
1181 reltext = TRUE;
1182 }
1183
1184 /* We use the reloc_count field as a counter if we need
1185 to copy relocs into the output file. */
1186 s->reloc_count = 0;
1187 }
1188 }
1189 else if (! CONST_STRNEQ (name, ".got")
1190 && strcmp (name, ".dynbss") != 0)
1191 {
1192 /* It's not one of our sections, so don't allocate space. */
1193 continue;
1194 }
1195
1196 if (s->size == 0)
1197 {
1198 /* If we don't need this section, strip it from the
1199 output file. This is mostly to handle .rela.bss and
1200 .rela.plt. We must create both sections in
1201 create_dynamic_sections, because they must be created
1202 before the linker maps input sections to output
1203 sections. The linker does that before
1204 adjust_dynamic_symbol is called, and it is that
1205 function which decides whether anything needs to go
1206 into these sections. */
1207 s->flags |= SEC_EXCLUDE;
1208 continue;
1209 }
1210
1211 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1212 continue;
1213
1214 /* Allocate memory for the section contents. */
1215 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1216 if (s->contents == NULL)
1217 return FALSE;
1218 }
1219
1220 if (elf_hash_table (info)->dynamic_sections_created)
1221 {
1222 /* Add some entries to the .dynamic section. We fill in the
1223 values later, in elf_vax_finish_dynamic_sections, but we
1224 must add the entries now so that we get the correct size for
1225 the .dynamic section. The DT_DEBUG entry is filled in by the
1226 dynamic linker and used by the debugger. */
1227 #define add_dynamic_entry(TAG, VAL) \
1228 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1229
1230 if (!info->shared)
1231 {
1232 if (!add_dynamic_entry (DT_DEBUG, 0))
1233 return FALSE;
1234 }
1235
1236 if (plt)
1237 {
1238 if (!add_dynamic_entry (DT_PLTGOT, 0)
1239 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1240 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1241 || !add_dynamic_entry (DT_JMPREL, 0))
1242 return FALSE;
1243 }
1244
1245 if (relocs)
1246 {
1247 if (!add_dynamic_entry (DT_RELA, 0)
1248 || !add_dynamic_entry (DT_RELASZ, 0)
1249 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1250 return FALSE;
1251 }
1252
1253 if (reltext || (info->flags & DF_TEXTREL) != 0)
1254 {
1255 if (!add_dynamic_entry (DT_TEXTREL, 0))
1256 return FALSE;
1257 }
1258 }
1259 #undef add_dynamic_entry
1260
1261 return TRUE;
1262 }
1263
1264 /* This function is called via elf_vax_link_hash_traverse if we are
1265 creating a shared object with -Bsymbolic. It discards the space
1266 allocated to copy PC relative relocs against symbols which are defined
1267 in regular objects. We allocated space for them in the check_relocs
1268 routine, but we won't fill them in in the relocate_section routine. */
1269
1270 static bfd_boolean
1271 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1272 PTR ignore ATTRIBUTE_UNUSED)
1273 {
1274 struct elf_vax_pcrel_relocs_copied *s;
1275
1276 /* We only discard relocs for symbols defined in a regular object. */
1277 if (!h->root.def_regular)
1278 return TRUE;
1279
1280 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1281 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1282
1283 return TRUE;
1284 }
1285
1286 /* This function is called via elf_link_hash_traverse. It looks for entries
1287 that have GOT or PLT (.GOT) references. If creating a static object or a
1288 shared object with -Bsymbolic, it resets the reference count back to 0
1289 and sets the offset to -1 so normal PC32 relocation will be done. If
1290 creating a shared object or executable, space in the .got and .rela.got
1291 will be reserved for the symbol. */
1292
1293 static bfd_boolean
1294 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, PTR infoptr)
1295 {
1296 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1297 bfd *dynobj;
1298 asection *sgot;
1299 asection *srelgot;
1300
1301 /* We don't care about non-GOT (and non-PLT) entries. */
1302 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1303 return TRUE;
1304
1305 dynobj = elf_hash_table (info)->dynobj;
1306 if (dynobj == NULL)
1307 return TRUE;
1308
1309 sgot = bfd_get_section_by_name (dynobj, ".got");
1310 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1311
1312 if (!elf_hash_table (info)->dynamic_sections_created
1313 || (info->shared && info->symbolic)
1314 || h->forced_local)
1315 {
1316 h->got.refcount = 0;
1317 h->got.offset = (bfd_vma) -1;
1318 h->plt.refcount = 0;
1319 h->plt.offset = (bfd_vma) -1;
1320 }
1321 else if (h->got.refcount > 0)
1322 {
1323 bfd_boolean dyn;
1324
1325 /* Make sure this symbol is output as a dynamic symbol. */
1326 if (h->dynindx == -1)
1327 {
1328 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1329 return FALSE;
1330 }
1331
1332 dyn = elf_hash_table (info)->dynamic_sections_created;
1333 /* Allocate space in the .got and .rela.got sections. */
1334 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1335 && (info->shared
1336 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1337 {
1338 sgot->size += 4;
1339 srelgot->size += sizeof (Elf32_External_Rela);
1340 }
1341 }
1342
1343 return TRUE;
1344 }
1345
1346 /* Relocate an VAX ELF section. */
1347
1348 static bfd_boolean
1349 elf_vax_relocate_section (bfd *output_bfd,
1350 struct bfd_link_info *info,
1351 bfd *input_bfd,
1352 asection *input_section,
1353 bfd_byte *contents,
1354 Elf_Internal_Rela *relocs,
1355 Elf_Internal_Sym *local_syms,
1356 asection **local_sections)
1357 {
1358 bfd *dynobj;
1359 Elf_Internal_Shdr *symtab_hdr;
1360 struct elf_link_hash_entry **sym_hashes;
1361 bfd_vma plt_index;
1362 bfd_vma got_offset;
1363 asection *sgot;
1364 asection *splt;
1365 asection *sgotplt;
1366 asection *sreloc;
1367 Elf_Internal_Rela *rel;
1368 Elf_Internal_Rela *relend;
1369
1370 dynobj = elf_hash_table (info)->dynobj;
1371 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1372 sym_hashes = elf_sym_hashes (input_bfd);
1373
1374 sgot = NULL;
1375 splt = NULL;
1376 sgotplt = NULL;
1377 sreloc = NULL;
1378
1379 rel = relocs;
1380 relend = relocs + input_section->reloc_count;
1381 for (; rel < relend; rel++)
1382 {
1383 int r_type;
1384 reloc_howto_type *howto;
1385 unsigned long r_symndx;
1386 struct elf_link_hash_entry *h;
1387 Elf_Internal_Sym *sym;
1388 asection *sec;
1389 bfd_vma relocation;
1390 bfd_reloc_status_type r;
1391
1392 r_type = ELF32_R_TYPE (rel->r_info);
1393 if (r_type < 0 || r_type >= (int) R_VAX_max)
1394 {
1395 bfd_set_error (bfd_error_bad_value);
1396 return FALSE;
1397 }
1398 howto = howto_table + r_type;
1399
1400 r_symndx = ELF32_R_SYM (rel->r_info);
1401 h = NULL;
1402 sym = NULL;
1403 sec = NULL;
1404 if (r_symndx < symtab_hdr->sh_info)
1405 {
1406 sym = local_syms + r_symndx;
1407 sec = local_sections[r_symndx];
1408 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1409 }
1410 else
1411 {
1412 bfd_boolean unresolved_reloc;
1413 bfd_boolean warned;
1414
1415 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1416 r_symndx, symtab_hdr, sym_hashes,
1417 h, sec, relocation,
1418 unresolved_reloc, warned);
1419
1420 if ((h->root.type == bfd_link_hash_defined
1421 || h->root.type == bfd_link_hash_defweak)
1422 && ((r_type == R_VAX_PLT32
1423 && h->plt.offset != (bfd_vma) -1
1424 && !h->forced_local
1425 && elf_hash_table (info)->dynamic_sections_created)
1426 || (r_type == R_VAX_GOT32
1427 && h->got.offset != (bfd_vma) -1
1428 && !h->forced_local
1429 && elf_hash_table (info)->dynamic_sections_created
1430 && (! info->shared
1431 || (! info->symbolic && h->dynindx != -1)
1432 || !h->def_regular))
1433 || (info->shared
1434 && ((! info->symbolic && h->dynindx != -1)
1435 || !h->def_regular)
1436 && ((input_section->flags & SEC_ALLOC) != 0
1437 /* DWARF will emit R_VAX_32 relocations in its
1438 sections against symbols defined externally
1439 in shared libraries. We can't do anything
1440 with them here. */
1441
1442 || ((input_section->flags & SEC_DEBUGGING) != 0
1443 && h->def_dynamic))
1444 && (r_type == R_VAX_8
1445 || r_type == R_VAX_16
1446 || r_type == R_VAX_32))))
1447 /* In these cases, we don't need the relocation
1448 value. We check specially because in some
1449 obscure cases sec->output_section will be NULL. */
1450 relocation = 0;
1451 }
1452
1453 if (sec != NULL && elf_discarded_section (sec))
1454 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1455 rel, relend, howto, contents);
1456
1457 if (info->relocatable)
1458 continue;
1459
1460 switch (r_type)
1461 {
1462 case R_VAX_GOT32:
1463 /* Relocation is to the address of the entry for this symbol
1464 in the global offset table. */
1465 if (h == NULL
1466 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1467 || h->got.offset == (bfd_vma) -1
1468 || h->forced_local)
1469 break;
1470
1471 /* Relocation is the offset of the entry for this symbol in
1472 the global offset table. */
1473
1474 {
1475 bfd_boolean dyn;
1476 bfd_vma off;
1477
1478 if (sgot == NULL)
1479 {
1480 sgot = bfd_get_section_by_name (dynobj, ".got");
1481 BFD_ASSERT (sgot != NULL);
1482 }
1483
1484 BFD_ASSERT (h != NULL);
1485 off = h->got.offset;
1486 BFD_ASSERT (off != (bfd_vma) -1);
1487 BFD_ASSERT (off < sgot->size);
1488
1489 dyn = elf_hash_table (info)->dynamic_sections_created;
1490 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1491 || (info->shared
1492 && SYMBOL_REFERENCES_LOCAL (info, h)))
1493 {
1494 /* The symbol was forced to be local
1495 because of a version file.. We must initialize
1496 this entry in the global offset table. Since
1497 the offset must always be a multiple of 4, we
1498 use the least significant bit to record whether
1499 we have initialized it already.
1500
1501 When doing a dynamic link, we create a .rela.got
1502 relocation entry to initialize the value. This
1503 is done in the finish_dynamic_symbol routine. */
1504 if ((off & 1) != 0)
1505 off &= ~1;
1506 else
1507 {
1508 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1509 sgot->contents + off);
1510 h->got.offset |= 1;
1511 }
1512 } else {
1513 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1514 }
1515
1516 relocation = sgot->output_offset + off;
1517 /* The GOT relocation uses the addend. */
1518 rel->r_addend = 0;
1519
1520 /* Change the reference to be indirect. */
1521 contents[rel->r_offset - 1] |= 0x10;
1522 relocation += sgot->output_section->vma;
1523 }
1524 break;
1525
1526 case R_VAX_PC32:
1527 /* If we are creating an executable and the function this
1528 reloc refers to is in a shared lib, then we made a PLT
1529 entry for this symbol and need to handle the reloc like
1530 a PLT reloc. */
1531 if (info->shared)
1532 goto r_vax_pc32_shared;
1533 /* Fall through. */
1534 case R_VAX_PLT32:
1535 /* Relocation is to the entry for this symbol in the
1536 procedure linkage table. */
1537
1538 /* Resolve a PLTxx reloc against a local symbol directly,
1539 without using the procedure linkage table. */
1540 if (h == NULL
1541 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1542 || h->forced_local)
1543 break;
1544
1545 if (h->plt.offset == (bfd_vma) -1
1546 || !elf_hash_table (info)->dynamic_sections_created)
1547 {
1548 /* We didn't make a PLT entry for this symbol. This
1549 happens when statically linking PIC code, or when
1550 using -Bsymbolic. */
1551 break;
1552 }
1553
1554 if (splt == NULL)
1555 {
1556 splt = bfd_get_section_by_name (dynobj, ".plt");
1557 BFD_ASSERT (splt != NULL);
1558 }
1559
1560 if (sgotplt == NULL)
1561 {
1562 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1563 BFD_ASSERT (sgotplt != NULL);
1564 }
1565
1566 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1567
1568 /* Get the offset into the .got table of the entry that
1569 corresponds to this function. Each .got entry is 4 bytes.
1570 The first two are reserved. */
1571 got_offset = (plt_index + 3) * 4;
1572
1573 /* We want the relocation to point into the .got.plt instead
1574 of the plt itself. */
1575 relocation = (sgotplt->output_section->vma
1576 + sgotplt->output_offset
1577 + got_offset);
1578 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1579 if (rel->r_addend == 2)
1580 {
1581 h->plt.offset |= 1;
1582 }
1583 else if (rel->r_addend != 0)
1584 (*_bfd_error_handler)
1585 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1586 bfd_get_filename (input_bfd), rel->r_addend,
1587 h->root.root.string,
1588 bfd_get_section_name (input_bfd, input_section));
1589 rel->r_addend = 0;
1590
1591 break;
1592
1593 case R_VAX_PC8:
1594 case R_VAX_PC16:
1595 r_vax_pc32_shared:
1596 if (h == NULL
1597 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1598 || h->forced_local)
1599 break;
1600 /* Fall through. */
1601 case R_VAX_8:
1602 case R_VAX_16:
1603 case R_VAX_32:
1604 if (info->shared
1605 && r_symndx != STN_UNDEF
1606 && (input_section->flags & SEC_ALLOC) != 0
1607 && ((r_type != R_VAX_PC8
1608 && r_type != R_VAX_PC16
1609 && r_type != R_VAX_PC32)
1610 || ((input_section->flags & SEC_CODE)
1611 && (!info->symbolic
1612 || (!h->def_regular && h->type != STT_SECTION)))))
1613 {
1614 Elf_Internal_Rela outrel;
1615 bfd_byte *loc;
1616 bfd_boolean skip, relocate;
1617
1618 /* When generating a shared object, these relocations
1619 are copied into the output file to be resolved at run
1620 time. */
1621 if (sreloc == NULL)
1622 {
1623 sreloc = _bfd_elf_get_dynamic_reloc_section
1624 (input_bfd, input_section, /*rela?*/ TRUE);
1625 if (sreloc == NULL)
1626 return FALSE;
1627 }
1628
1629 skip = FALSE;
1630 relocate = FALSE;
1631
1632 outrel.r_offset =
1633 _bfd_elf_section_offset (output_bfd, info, input_section,
1634 rel->r_offset);
1635 if (outrel.r_offset == (bfd_vma) -1)
1636 skip = TRUE;
1637 if (outrel.r_offset == (bfd_vma) -2)
1638 skip = TRUE, relocate = TRUE;
1639 outrel.r_offset += (input_section->output_section->vma
1640 + input_section->output_offset);
1641
1642 if (skip)
1643 memset (&outrel, 0, sizeof outrel);
1644 /* h->dynindx may be -1 if the symbol was marked to
1645 become local. */
1646 else if (h != NULL
1647 && ((! info->symbolic && h->dynindx != -1)
1648 || !h->def_regular))
1649 {
1650 BFD_ASSERT (h->dynindx != -1);
1651 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1652 outrel.r_addend = relocation + rel->r_addend;
1653 }
1654 else
1655 {
1656 if (r_type == R_VAX_32)
1657 {
1658 relocate = TRUE;
1659 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1660 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1661 &contents[rel->r_offset]) == 0);
1662 outrel.r_addend = relocation + rel->r_addend;
1663 }
1664 else
1665 {
1666 long indx;
1667
1668 if (bfd_is_abs_section (sec))
1669 indx = 0;
1670 else if (sec == NULL || sec->owner == NULL)
1671 {
1672 bfd_set_error (bfd_error_bad_value);
1673 return FALSE;
1674 }
1675 else
1676 {
1677 asection *osec;
1678
1679 /* We are turning this relocation into one
1680 against a section symbol. It would be
1681 proper to subtract the symbol's value,
1682 osec->vma, from the emitted reloc addend,
1683 but ld.so expects buggy relocs. */
1684 osec = sec->output_section;
1685 indx = elf_section_data (osec)->dynindx;
1686 if (indx == 0)
1687 {
1688 struct elf_link_hash_table *htab;
1689 htab = elf_hash_table (info);
1690 osec = htab->text_index_section;
1691 indx = elf_section_data (osec)->dynindx;
1692 }
1693 BFD_ASSERT (indx != 0);
1694 }
1695
1696 outrel.r_info = ELF32_R_INFO (indx, r_type);
1697 outrel.r_addend = relocation + rel->r_addend;
1698 }
1699 }
1700
1701 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1702 ".text") != 0 ||
1703 (info->shared
1704 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1705 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1706 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1707 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1708 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1709 {
1710 if (h != NULL)
1711 (*_bfd_error_handler)
1712 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1713 bfd_get_filename (input_bfd), howto->name,
1714 h->root.root.string,
1715 bfd_get_section_name (input_bfd, input_section));
1716 else
1717 (*_bfd_error_handler)
1718 (_("%s: warning: %s relocation to 0x%x from %s section"),
1719 bfd_get_filename (input_bfd), howto->name,
1720 outrel.r_addend,
1721 bfd_get_section_name (input_bfd, input_section));
1722 }
1723 loc = sreloc->contents;
1724 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1725 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1726
1727 /* This reloc will be computed at runtime, so there's no
1728 need to do anything now, except for R_VAX_32
1729 relocations that have been turned into
1730 R_VAX_RELATIVE. */
1731 if (!relocate)
1732 continue;
1733 }
1734
1735 break;
1736
1737 case R_VAX_GNU_VTINHERIT:
1738 case R_VAX_GNU_VTENTRY:
1739 /* These are no-ops in the end. */
1740 continue;
1741
1742 default:
1743 break;
1744 }
1745
1746 /* VAX PCREL relocations are from the end of relocation, not the start.
1747 So subtract the difference from the relocation amount since we can't
1748 add it to the offset. */
1749 if (howto->pc_relative && howto->pcrel_offset)
1750 relocation -= bfd_get_reloc_size(howto);
1751
1752 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1753 contents, rel->r_offset,
1754 relocation, rel->r_addend);
1755
1756 if (r != bfd_reloc_ok)
1757 {
1758 switch (r)
1759 {
1760 default:
1761 case bfd_reloc_outofrange:
1762 abort ();
1763 case bfd_reloc_overflow:
1764 {
1765 const char *name;
1766
1767 if (h != NULL)
1768 name = NULL;
1769 else
1770 {
1771 name = bfd_elf_string_from_elf_section (input_bfd,
1772 symtab_hdr->sh_link,
1773 sym->st_name);
1774 if (name == NULL)
1775 return FALSE;
1776 if (*name == '\0')
1777 name = bfd_section_name (input_bfd, sec);
1778 }
1779 if (!(info->callbacks->reloc_overflow
1780 (info, (h ? &h->root : NULL), name, howto->name,
1781 (bfd_vma) 0, input_bfd, input_section,
1782 rel->r_offset)))
1783 return FALSE;
1784 }
1785 break;
1786 }
1787 }
1788 }
1789
1790 return TRUE;
1791 }
1792
1793 /* Finish up dynamic symbol handling. We set the contents of various
1794 dynamic sections here. */
1795
1796 static bfd_boolean
1797 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1798 struct elf_link_hash_entry *h,
1799 Elf_Internal_Sym *sym)
1800 {
1801 bfd *dynobj;
1802
1803 dynobj = elf_hash_table (info)->dynobj;
1804
1805 if (h->plt.offset != (bfd_vma) -1)
1806 {
1807 asection *splt;
1808 asection *sgot;
1809 asection *srela;
1810 bfd_vma plt_index;
1811 bfd_vma got_offset;
1812 bfd_vma addend;
1813 Elf_Internal_Rela rela;
1814 bfd_byte *loc;
1815
1816 /* This symbol has an entry in the procedure linkage table. Set
1817 it up. */
1818 BFD_ASSERT (h->dynindx != -1);
1819
1820 splt = bfd_get_section_by_name (dynobj, ".plt");
1821 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1822 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1823 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1824
1825 addend = 2 * (h->plt.offset & 1);
1826 h->plt.offset &= ~1;
1827
1828 /* Get the index in the procedure linkage table which
1829 corresponds to this symbol. This is the index of this symbol
1830 in all the symbols for which we are making plt entries. The
1831 first entry in the procedure linkage table is reserved. */
1832 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1833
1834 /* Get the offset into the .got table of the entry that
1835 corresponds to this function. Each .got entry is 4 bytes.
1836 The first two are reserved. */
1837 got_offset = (plt_index + 3) * 4;
1838
1839 /* Fill in the entry in the procedure linkage table. */
1840 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1841 PLT_ENTRY_SIZE);
1842
1843 /* The offset is relative to the first extension word. */
1844 bfd_put_32 (output_bfd,
1845 -(h->plt.offset + 8),
1846 splt->contents + h->plt.offset + 4);
1847
1848 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1849 splt->contents + h->plt.offset + 8);
1850
1851 /* Fill in the entry in the global offset table. */
1852 bfd_put_32 (output_bfd,
1853 (splt->output_section->vma
1854 + splt->output_offset
1855 + h->plt.offset) + addend,
1856 sgot->contents + got_offset);
1857
1858 /* Fill in the entry in the .rela.plt section. */
1859 rela.r_offset = (sgot->output_section->vma
1860 + sgot->output_offset
1861 + got_offset);
1862 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1863 rela.r_addend = addend;
1864 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1865 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1866
1867 if (!h->def_regular)
1868 {
1869 /* Mark the symbol as undefined, rather than as defined in
1870 the .plt section. Leave the value alone. */
1871 sym->st_shndx = SHN_UNDEF;
1872 }
1873 }
1874
1875 if (h->got.offset != (bfd_vma) -1)
1876 {
1877 asection *sgot;
1878 asection *srela;
1879 Elf_Internal_Rela rela;
1880 bfd_byte *loc;
1881
1882 /* This symbol has an entry in the global offset table. Set it
1883 up. */
1884 sgot = bfd_get_section_by_name (dynobj, ".got");
1885 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1886 BFD_ASSERT (sgot != NULL && srela != NULL);
1887
1888 rela.r_offset = (sgot->output_section->vma
1889 + sgot->output_offset
1890 + (h->got.offset &~ 1));
1891
1892 /* If the symbol was forced to be local because of a version file
1893 locally we just want to emit a RELATIVE reloc. The entry in
1894 the global offset table will already have been initialized in
1895 the relocate_section function. */
1896 if (info->shared
1897 && h->dynindx == -1
1898 && h->def_regular)
1899 {
1900 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1901 }
1902 else
1903 {
1904 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1905 }
1906 rela.r_addend = bfd_get_signed_32 (output_bfd,
1907 (sgot->contents
1908 + (h->got.offset & ~1)));
1909
1910 loc = srela->contents;
1911 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1912 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1913 }
1914
1915 if (h->needs_copy)
1916 {
1917 asection *s;
1918 Elf_Internal_Rela rela;
1919 bfd_byte *loc;
1920
1921 /* This symbol needs a copy reloc. Set it up. */
1922 BFD_ASSERT (h->dynindx != -1
1923 && (h->root.type == bfd_link_hash_defined
1924 || h->root.type == bfd_link_hash_defweak));
1925
1926 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1927 ".rela.bss");
1928 BFD_ASSERT (s != NULL);
1929
1930 rela.r_offset = (h->root.u.def.value
1931 + h->root.u.def.section->output_section->vma
1932 + h->root.u.def.section->output_offset);
1933 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1934 rela.r_addend = 0;
1935 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1936 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1937 }
1938
1939 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1940 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1941 || h == elf_hash_table (info)->hgot)
1942 sym->st_shndx = SHN_ABS;
1943
1944 return TRUE;
1945 }
1946
1947 /* Finish up the dynamic sections. */
1948
1949 static bfd_boolean
1950 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1951 {
1952 bfd *dynobj;
1953 asection *sgot;
1954 asection *sdyn;
1955
1956 dynobj = elf_hash_table (info)->dynobj;
1957
1958 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1959 BFD_ASSERT (sgot != NULL);
1960 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1961
1962 if (elf_hash_table (info)->dynamic_sections_created)
1963 {
1964 asection *splt;
1965 Elf32_External_Dyn *dyncon, *dynconend;
1966
1967 splt = bfd_get_section_by_name (dynobj, ".plt");
1968 BFD_ASSERT (splt != NULL && sdyn != NULL);
1969
1970 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1971 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1972 for (; dyncon < dynconend; dyncon++)
1973 {
1974 Elf_Internal_Dyn dyn;
1975 const char *name;
1976 asection *s;
1977
1978 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1979
1980 switch (dyn.d_tag)
1981 {
1982 default:
1983 break;
1984
1985 case DT_PLTGOT:
1986 name = ".got";
1987 goto get_vma;
1988 case DT_JMPREL:
1989 name = ".rela.plt";
1990 get_vma:
1991 s = bfd_get_section_by_name (output_bfd, name);
1992 BFD_ASSERT (s != NULL);
1993 dyn.d_un.d_ptr = s->vma;
1994 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1995 break;
1996
1997 case DT_PLTRELSZ:
1998 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1999 BFD_ASSERT (s != NULL);
2000 dyn.d_un.d_val = s->size;
2001 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2002 break;
2003
2004 case DT_RELASZ:
2005 /* The procedure linkage table relocs (DT_JMPREL) should
2006 not be included in the overall relocs (DT_RELA).
2007 Therefore, we override the DT_RELASZ entry here to
2008 make it not include the JMPREL relocs. Since the
2009 linker script arranges for .rela.plt to follow all
2010 other relocation sections, we don't have to worry
2011 about changing the DT_RELA entry. */
2012 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2013 if (s != NULL)
2014 dyn.d_un.d_val -= s->size;
2015 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2016 break;
2017 }
2018 }
2019
2020 /* Fill in the first entry in the procedure linkage table. */
2021 if (splt->size > 0)
2022 {
2023 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2024 bfd_put_32 (output_bfd,
2025 (sgot->output_section->vma
2026 + sgot->output_offset + 4
2027 - (splt->output_section->vma + 6)),
2028 splt->contents + 2);
2029 bfd_put_32 (output_bfd,
2030 (sgot->output_section->vma
2031 + sgot->output_offset + 8
2032 - (splt->output_section->vma + 12)),
2033 splt->contents + 8);
2034 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2035 = PLT_ENTRY_SIZE;
2036 }
2037 }
2038
2039 /* Fill in the first three entries in the global offset table. */
2040 if (sgot->size > 0)
2041 {
2042 if (sdyn == NULL)
2043 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2044 else
2045 bfd_put_32 (output_bfd,
2046 sdyn->output_section->vma + sdyn->output_offset,
2047 sgot->contents);
2048 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2049 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2050 }
2051
2052 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2053
2054 return TRUE;
2055 }
2056
2057 static enum elf_reloc_type_class
2058 elf_vax_reloc_type_class (const Elf_Internal_Rela *rela)
2059 {
2060 switch ((int) ELF32_R_TYPE (rela->r_info))
2061 {
2062 case R_VAX_RELATIVE:
2063 return reloc_class_relative;
2064 case R_VAX_JMP_SLOT:
2065 return reloc_class_plt;
2066 case R_VAX_COPY:
2067 return reloc_class_copy;
2068 default:
2069 return reloc_class_normal;
2070 }
2071 }
2072
2073 static bfd_vma
2074 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
2075 const arelent *rel ATTRIBUTE_UNUSED)
2076 {
2077 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
2078 }
2079
2080 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2081 #define TARGET_LITTLE_NAME "elf32-vax"
2082 #define ELF_MACHINE_CODE EM_VAX
2083 #define ELF_MAXPAGESIZE 0x1000
2084
2085 #define elf_backend_create_dynamic_sections \
2086 _bfd_elf_create_dynamic_sections
2087 #define bfd_elf32_bfd_link_hash_table_create \
2088 elf_vax_link_hash_table_create
2089 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2090
2091 #define elf_backend_check_relocs elf_vax_check_relocs
2092 #define elf_backend_adjust_dynamic_symbol \
2093 elf_vax_adjust_dynamic_symbol
2094 #define elf_backend_size_dynamic_sections \
2095 elf_vax_size_dynamic_sections
2096 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2097 #define elf_backend_relocate_section elf_vax_relocate_section
2098 #define elf_backend_finish_dynamic_symbol \
2099 elf_vax_finish_dynamic_symbol
2100 #define elf_backend_finish_dynamic_sections \
2101 elf_vax_finish_dynamic_sections
2102 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2103 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2104 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2105 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2106 #define bfd_elf32_bfd_merge_private_bfd_data \
2107 elf32_vax_merge_private_bfd_data
2108 #define bfd_elf32_bfd_set_private_flags \
2109 elf32_vax_set_private_flags
2110 #define bfd_elf32_bfd_print_private_bfd_data \
2111 elf32_vax_print_private_bfd_data
2112
2113 #define elf_backend_can_gc_sections 1
2114 #define elf_backend_want_got_plt 1
2115 #define elf_backend_plt_readonly 1
2116 #define elf_backend_want_plt_sym 0
2117 #define elf_backend_got_header_size 16
2118 #define elf_backend_rela_normal 1
2119
2120 #include "elf32-target.h"
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