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* elf32-vax.c (elf_vax_check_relocs): Remove unused
[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
3 Free Software Foundation, Inc.
4 Contributed by Matt Thomas <matt@3am-software.com>.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21
22 #include "bfd.h"
23 #include "sysdep.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/vax.h"
28
29 static reloc_howto_type *reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31 static void rtype_to_howto
32 PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
33 static struct bfd_hash_entry *elf_vax_link_hash_newfunc
34 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
35 static struct bfd_link_hash_table *elf_vax_link_hash_table_create
36 PARAMS ((bfd *));
37 static boolean elf_vax_check_relocs
38 PARAMS ((bfd *, struct bfd_link_info *, asection *,
39 const Elf_Internal_Rela *));
40 static asection *elf_vax_gc_mark_hook
41 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
42 struct elf_link_hash_entry *, Elf_Internal_Sym *));
43 static boolean elf_vax_gc_sweep_hook
44 PARAMS ((bfd *, struct bfd_link_info *, asection *,
45 const Elf_Internal_Rela *));
46 static boolean elf_vax_adjust_dynamic_symbol
47 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
48 static boolean elf_vax_size_dynamic_sections
49 PARAMS ((bfd *, struct bfd_link_info *));
50 static boolean elf_vax_relocate_section
51 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
52 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
53 static boolean elf_vax_finish_dynamic_symbol
54 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
55 Elf_Internal_Sym *));
56 static boolean elf_vax_finish_dynamic_sections
57 PARAMS ((bfd *, struct bfd_link_info *));
58
59 static boolean elf32_vax_set_private_flags
60 PARAMS ((bfd *, flagword));
61 static boolean elf32_vax_merge_private_bfd_data
62 PARAMS ((bfd *, bfd *));
63 static boolean elf32_vax_print_private_bfd_data
64 PARAMS ((bfd *, PTR));
65
66 static reloc_howto_type howto_table[] = {
67 HOWTO (R_VAX_NONE, /* type */
68 0, /* rightshift */
69 0, /* size (0 = byte, 1 = short, 2 = long) */
70 0, /* bitsize */
71 false, /* pc_relative */
72 0, /* bitpos */
73 complain_overflow_dont, /* complain_on_overflow */
74 bfd_elf_generic_reloc, /* special_function */
75 "R_VAX_NONE", /* name */
76 false, /* partial_inplace */
77 0, /* src_mask */
78 0x00000000, /* dst_mask */
79 false), /* pcrel_offset */
80
81 HOWTO (R_VAX_32, /* type */
82 0, /* rightshift */
83 2, /* size (0 = byte, 1 = short, 2 = long) */
84 32, /* bitsize */
85 false, /* pc_relative */
86 0, /* bitpos */
87 complain_overflow_bitfield, /* complain_on_overflow */
88 bfd_elf_generic_reloc, /* special_function */
89 "R_VAX_32", /* name */
90 false, /* partial_inplace */
91 0, /* src_mask */
92 0xffffffff, /* dst_mask */
93 false), /* pcrel_offset */
94
95 HOWTO (R_VAX_16, /* type */
96 0, /* rightshift */
97 1, /* size (0 = byte, 1 = short, 2 = long) */
98 16, /* bitsize */
99 false, /* pc_relative */
100 0, /* bitpos */
101 complain_overflow_bitfield, /* complain_on_overflow */
102 bfd_elf_generic_reloc, /* special_function */
103 "R_VAX_16", /* name */
104 false, /* partial_inplace */
105 0, /* src_mask */
106 0x0000ffff, /* dst_mask */
107 false), /* pcrel_offset */
108
109 HOWTO (R_VAX_8, /* type */
110 0, /* rightshift */
111 0, /* size (0 = byte, 1 = short, 2 = long) */
112 8, /* bitsize */
113 false, /* pc_relative */
114 0, /* bitpos */
115 complain_overflow_bitfield, /* complain_on_overflow */
116 bfd_elf_generic_reloc, /* special_function */
117 "R_VAX_8", /* name */
118 false, /* partial_inplace */
119 0, /* src_mask */
120 0x000000ff, /* dst_mask */
121 false), /* pcrel_offset */
122
123 HOWTO (R_VAX_PC32, /* type */
124 0, /* rightshift */
125 2, /* size (0 = byte, 1 = short, 2 = long) */
126 32, /* bitsize */
127 true, /* pc_relative */
128 0, /* bitpos */
129 complain_overflow_bitfield, /* complain_on_overflow */
130 bfd_elf_generic_reloc, /* special_function */
131 "R_VAX_PC32", /* name */
132 false, /* partial_inplace */
133 0, /* src_mask */
134 0xffffffff, /* dst_mask */
135 true), /* pcrel_offset */
136
137 HOWTO (R_VAX_PC16, /* type */
138 0, /* rightshift */
139 1, /* size (0 = byte, 1 = short, 2 = long) */
140 16, /* bitsize */
141 true, /* pc_relative */
142 0, /* bitpos */
143 complain_overflow_signed, /* complain_on_overflow */
144 bfd_elf_generic_reloc, /* special_function */
145 "R_VAX_PC16", /* name */
146 false, /* partial_inplace */
147 0, /* src_mask */
148 0x0000ffff, /* dst_mask */
149 true), /* pcrel_offset */
150
151 HOWTO (R_VAX_PC8, /* type */
152 0, /* rightshift */
153 0, /* size (0 = byte, 1 = short, 2 = long) */
154 8, /* bitsize */
155 true, /* pc_relative */
156 0, /* bitpos */
157 complain_overflow_signed, /* complain_on_overflow */
158 bfd_elf_generic_reloc, /* special_function */
159 "R_VAX_PC8", /* name */
160 false, /* partial_inplace */
161 0, /* src_mask */
162 0x000000ff, /* dst_mask */
163 true), /* pcrel_offset */
164
165 HOWTO (R_VAX_GOT32, /* type */
166 0, /* rightshift */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
168 32, /* bitsize */
169 true, /* pc_relative */
170 0, /* bitpos */
171 complain_overflow_bitfield, /* complain_on_overflow */
172 bfd_elf_generic_reloc, /* special_function */
173 "R_VAX_GOT32", /* name */
174 false, /* partial_inplace */
175 0, /* src_mask */
176 0xffffffff, /* dst_mask */
177 true), /* pcrel_offset */
178
179 EMPTY_HOWTO (-1),
180 EMPTY_HOWTO (-1),
181 EMPTY_HOWTO (-1),
182 EMPTY_HOWTO (-1),
183 EMPTY_HOWTO (-1),
184
185 HOWTO (R_VAX_PLT32, /* type */
186 0, /* rightshift */
187 2, /* size (0 = byte, 1 = short, 2 = long) */
188 32, /* bitsize */
189 true, /* pc_relative */
190 0, /* bitpos */
191 complain_overflow_bitfield, /* complain_on_overflow */
192 bfd_elf_generic_reloc, /* special_function */
193 "R_VAX_PLT32", /* name */
194 false, /* partial_inplace */
195 0, /* src_mask */
196 0xffffffff, /* dst_mask */
197 true), /* pcrel_offset */
198
199 EMPTY_HOWTO (-1),
200 EMPTY_HOWTO (-1),
201 EMPTY_HOWTO (-1),
202 EMPTY_HOWTO (-1),
203 EMPTY_HOWTO (-1),
204
205 HOWTO (R_VAX_COPY, /* type */
206 0, /* rightshift */
207 0, /* size (0 = byte, 1 = short, 2 = long) */
208 0, /* bitsize */
209 false, /* pc_relative */
210 0, /* bitpos */
211 complain_overflow_dont, /* complain_on_overflow */
212 bfd_elf_generic_reloc, /* special_function */
213 "R_VAX_COPY", /* name */
214 false, /* partial_inplace */
215 0, /* src_mask */
216 0xffffffff, /* dst_mask */
217 false), /* pcrel_offset */
218
219 HOWTO (R_VAX_GLOB_DAT, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 false, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_dont, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_VAX_GLOB_DAT", /* name */
228 false, /* partial_inplace */
229 0, /* src_mask */
230 0xffffffff, /* dst_mask */
231 false), /* pcrel_offset */
232
233 HOWTO (R_VAX_JMP_SLOT, /* type */
234 0, /* rightshift */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
236 32, /* bitsize */
237 false, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_dont, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_VAX_JMP_SLOT", /* name */
242 false, /* partial_inplace */
243 0, /* src_mask */
244 0xffffffff, /* dst_mask */
245 false), /* pcrel_offset */
246
247 HOWTO (R_VAX_RELATIVE, /* type */
248 0, /* rightshift */
249 2, /* size (0 = byte, 1 = short, 2 = long) */
250 32, /* bitsize */
251 false, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_dont, /* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_VAX_RELATIVE", /* name */
256 false, /* partial_inplace */
257 0, /* src_mask */
258 0xffffffff, /* dst_mask */
259 false), /* pcrel_offset */
260
261 /* GNU extension to record C++ vtable hierarchy */
262 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
263 0, /* rightshift */
264 2, /* size (0 = byte, 1 = short, 2 = long) */
265 0, /* bitsize */
266 false, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_dont, /* complain_on_overflow */
269 NULL, /* special_function */
270 "R_VAX_GNU_VTINHERIT", /* name */
271 false, /* partial_inplace */
272 0, /* src_mask */
273 0, /* dst_mask */
274 false), /* pcrel_offset */
275
276 /* GNU extension to record C++ vtable member usage */
277 HOWTO (R_VAX_GNU_VTENTRY, /* type */
278 0, /* rightshift */
279 2, /* size (0 = byte, 1 = short, 2 = long) */
280 0, /* bitsize */
281 false, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_dont, /* complain_on_overflow */
284 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
285 "R_VAX_GNU_VTENTRY", /* name */
286 false, /* partial_inplace */
287 0, /* src_mask */
288 0, /* dst_mask */
289 false), /* pcrel_offset */
290 };
291
292 static void
293 rtype_to_howto (abfd, cache_ptr, dst)
294 bfd *abfd ATTRIBUTE_UNUSED;
295 arelent *cache_ptr;
296 Elf_Internal_Rela *dst;
297 {
298 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
299 cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
300 }
301
302 #define elf_info_to_howto rtype_to_howto
303
304 static const struct
305 {
306 bfd_reloc_code_real_type bfd_val;
307 int elf_val;
308 } reloc_map[] = {
309 { BFD_RELOC_NONE, R_VAX_NONE },
310 { BFD_RELOC_32, R_VAX_32 },
311 { BFD_RELOC_16, R_VAX_16 },
312 { BFD_RELOC_8, R_VAX_8 },
313 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
314 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
315 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
316 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
317 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
318 { BFD_RELOC_NONE, R_VAX_COPY },
319 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
320 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
321 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
322 { BFD_RELOC_CTOR, R_VAX_32 },
323 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
324 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
325 };
326
327 static reloc_howto_type *
328 reloc_type_lookup (abfd, code)
329 bfd *abfd ATTRIBUTE_UNUSED;
330 bfd_reloc_code_real_type code;
331 {
332 unsigned int i;
333 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
334 {
335 if (reloc_map[i].bfd_val == code)
336 return &howto_table[reloc_map[i].elf_val];
337 }
338 return 0;
339 }
340
341 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
342 #define ELF_ARCH bfd_arch_vax
343 /* end code generated by elf.el */
344 \f
345 /* Functions for the VAX ELF linker. */
346
347 /* The name of the dynamic interpreter. This is put in the .interp
348 section. */
349
350 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
351
352 /* The size in bytes of an entry in the procedure linkage table. */
353
354 #define PLT_ENTRY_SIZE 12
355
356 /* The first entry in a procedure linkage table looks like this. See
357 the SVR4 ABI VAX supplement to see how this works. */
358
359 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
360 {
361 0xdd, 0xef, /* pushl l^ */
362 0, 0, 0, 0, /* offset to .plt.got + 4 */
363 0x17, 0xff, /* jmp @L^(pc) */
364 0, 0, 0, 0, /* offset to .plt.got + 8 */
365 };
366
367 /* Subsequent entries in a procedure linkage table look like this. */
368
369 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
370 {
371 0x40, 0x00, /* .word ^M<r6> */
372 0x16, 0xef, /* jsb L^(pc) */
373 0, 0, 0, 0, /* replaced with offset to start of .plt */
374 0, 0, 0, 0, /* index into .rela.plt */
375 };
376
377 /* The VAX linker needs to keep track of the number of relocs that it
378 decides to copy in check_relocs for each symbol. This is so that it
379 can discard PC relative relocs if it doesn't need them when linking
380 with -Bsymbolic. We store the information in a field extending the
381 regular ELF linker hash table. */
382
383 /* This structure keeps track of the number of PC relative relocs we have
384 copied for a given symbol. */
385
386 struct elf_vax_pcrel_relocs_copied
387 {
388 /* Next section. */
389 struct elf_vax_pcrel_relocs_copied *next;
390 /* A section in dynobj. */
391 asection *section;
392 /* Number of relocs copied in this section. */
393 bfd_size_type count;
394 };
395
396 /* VAX ELF linker hash entry. */
397
398 struct elf_vax_link_hash_entry
399 {
400 struct elf_link_hash_entry root;
401
402 /* Number of PC relative relocs copied for this symbol. */
403 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
404
405 bfd_vma got_addend;
406 };
407
408 /* VAX ELF linker hash table. */
409
410 struct elf_vax_link_hash_table
411 {
412 struct elf_link_hash_table root;
413 };
414
415 /* Declare this now that the above structures are defined. */
416
417 static boolean elf_vax_discard_copies
418 PARAMS ((struct elf_vax_link_hash_entry *, PTR));
419
420 /* Declare this now that the above structures are defined. */
421
422 static boolean elf_vax_instantiate_got_entries
423 PARAMS ((struct elf_link_hash_entry *, PTR));
424
425 /* Traverse an VAX ELF linker hash table. */
426
427 #define elf_vax_link_hash_traverse(table, func, info) \
428 (elf_link_hash_traverse \
429 (&(table)->root, \
430 (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
431 (info)))
432
433 /* Get the VAX ELF linker hash table from a link_info structure. */
434
435 #define elf_vax_hash_table(p) \
436 ((struct elf_vax_link_hash_table *) (p)->hash)
437
438 /* Create an entry in an VAX ELF linker hash table. */
439
440 static struct bfd_hash_entry *
441 elf_vax_link_hash_newfunc (entry, table, string)
442 struct bfd_hash_entry *entry;
443 struct bfd_hash_table *table;
444 const char *string;
445 {
446 struct elf_vax_link_hash_entry *ret =
447 (struct elf_vax_link_hash_entry *) entry;
448
449 /* Allocate the structure if it has not already been allocated by a
450 subclass. */
451 if (ret == (struct elf_vax_link_hash_entry *) NULL)
452 ret = ((struct elf_vax_link_hash_entry *)
453 bfd_hash_allocate (table,
454 sizeof (struct elf_vax_link_hash_entry)));
455 if (ret == (struct elf_vax_link_hash_entry *) NULL)
456 return (struct bfd_hash_entry *) ret;
457
458 /* Call the allocation method of the superclass. */
459 ret = ((struct elf_vax_link_hash_entry *)
460 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
461 table, string));
462 if (ret != (struct elf_vax_link_hash_entry *) NULL)
463 {
464 ret->pcrel_relocs_copied = NULL;
465 }
466
467 return (struct bfd_hash_entry *) ret;
468 }
469
470 /* Create an VAX ELF linker hash table. */
471
472 static struct bfd_link_hash_table *
473 elf_vax_link_hash_table_create (abfd)
474 bfd *abfd;
475 {
476 struct elf_vax_link_hash_table *ret;
477 bfd_size_type amt = sizeof (struct elf_vax_link_hash_table);
478
479 ret = (struct elf_vax_link_hash_table *) bfd_malloc (amt);
480 if (ret == (struct elf_vax_link_hash_table *) NULL)
481 return NULL;
482
483 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
484 elf_vax_link_hash_newfunc))
485 {
486 free (ret);
487 return NULL;
488 }
489
490 return &ret->root.root;
491 }
492
493 /* Keep vax-specific flags in the ELF header */
494 static boolean
495 elf32_vax_set_private_flags (abfd, flags)
496 bfd *abfd;
497 flagword flags;
498 {
499 elf_elfheader (abfd)->e_flags = flags;
500 elf_flags_init (abfd) = true;
501 return true;
502 }
503
504 /* Merge backend specific data from an object file to the output
505 object file when linking. */
506 static boolean
507 elf32_vax_merge_private_bfd_data (ibfd, obfd)
508 bfd *ibfd;
509 bfd *obfd;
510 {
511 flagword out_flags;
512 flagword in_flags;
513
514 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
515 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
516 return true;
517
518 in_flags = elf_elfheader (ibfd)->e_flags;
519 out_flags = elf_elfheader (obfd)->e_flags;
520
521 if (!elf_flags_init (obfd))
522 {
523 elf_flags_init (obfd) = true;
524 elf_elfheader (obfd)->e_flags = in_flags;
525 }
526
527 return true;
528 }
529
530 /* Display the flags field */
531 static boolean
532 elf32_vax_print_private_bfd_data (abfd, ptr)
533 bfd *abfd;
534 PTR ptr;
535 {
536 FILE *file = (FILE *) ptr;
537
538 BFD_ASSERT (abfd != NULL && ptr != NULL);
539
540 /* Print normal ELF private data. */
541 _bfd_elf_print_private_bfd_data (abfd, ptr);
542
543 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
544
545 /* xgettext:c-format */
546 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
547
548 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
549 fprintf (file, _(" [nonpic]"));
550
551 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
552 fprintf (file, _(" [d-float]"));
553
554 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
555 fprintf (file, _(" [g-float]"));
556
557 fputc ('\n', file);
558
559 return true;
560 }
561 /* Look through the relocs for a section during the first phase, and
562 allocate space in the global offset table or procedure linkage
563 table. */
564
565 static boolean
566 elf_vax_check_relocs (abfd, info, sec, relocs)
567 bfd *abfd;
568 struct bfd_link_info *info;
569 asection *sec;
570 const Elf_Internal_Rela *relocs;
571 {
572 bfd *dynobj;
573 Elf_Internal_Shdr *symtab_hdr;
574 struct elf_link_hash_entry **sym_hashes;
575 const Elf_Internal_Rela *rel;
576 const Elf_Internal_Rela *rel_end;
577 asection *sgot;
578 asection *srelgot;
579 asection *sreloc;
580
581 if (info->relocateable)
582 return true;
583
584 dynobj = elf_hash_table (info)->dynobj;
585 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
586 sym_hashes = elf_sym_hashes (abfd);
587
588 sgot = NULL;
589 srelgot = NULL;
590 sreloc = NULL;
591
592 rel_end = relocs + sec->reloc_count;
593 for (rel = relocs; rel < rel_end; rel++)
594 {
595 unsigned long r_symndx;
596 struct elf_link_hash_entry *h;
597
598 r_symndx = ELF32_R_SYM (rel->r_info);
599
600 if (r_symndx < symtab_hdr->sh_info)
601 h = NULL;
602 else
603 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
604
605 switch (ELF32_R_TYPE (rel->r_info))
606 {
607 case R_VAX_GOT32:
608 if (h != NULL
609 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
610 break;
611
612 /* This symbol requires a global offset table entry. */
613
614 if (dynobj == NULL)
615 {
616 /* Create the .got section. */
617 elf_hash_table (info)->dynobj = dynobj = abfd;
618 if (!_bfd_elf_create_got_section (dynobj, info))
619 return false;
620 }
621
622 if (sgot == NULL)
623 {
624 sgot = bfd_get_section_by_name (dynobj, ".got");
625 BFD_ASSERT (sgot != NULL);
626 }
627
628 if (srelgot == NULL
629 && (h != NULL || info->shared))
630 {
631 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
632 if (srelgot == NULL)
633 {
634 srelgot = bfd_make_section (dynobj, ".rela.got");
635 if (srelgot == NULL
636 || !bfd_set_section_flags (dynobj, srelgot,
637 (SEC_ALLOC
638 | SEC_LOAD
639 | SEC_HAS_CONTENTS
640 | SEC_IN_MEMORY
641 | SEC_LINKER_CREATED
642 | SEC_READONLY))
643 || !bfd_set_section_alignment (dynobj, srelgot, 2))
644 return false;
645 }
646 }
647
648 if (h != NULL)
649 {
650 struct elf_vax_link_hash_entry *eh;
651
652 eh = (struct elf_vax_link_hash_entry *) h;
653 if (h->got.refcount == -1)
654 {
655 h->got.refcount = 1;
656 eh->got_addend = rel->r_addend;
657 }
658 else
659 {
660 h->got.refcount++;
661 if (eh->got_addend != (bfd_vma) rel->r_addend)
662 (*_bfd_error_handler)
663 (_("%s: warning: GOT addend of %ld to `%s' does not match previous GOT addend of %ld"),
664 bfd_get_filename (abfd), rel->r_addend,
665 h->root.root.string,
666 eh->got_addend);
667
668 }
669 }
670 break;
671
672 case R_VAX_PLT32:
673 /* This symbol requires a procedure linkage table entry. We
674 actually build the entry in adjust_dynamic_symbol,
675 because this might be a case of linking PIC code which is
676 never referenced by a dynamic object, in which case we
677 don't need to generate a procedure linkage table entry
678 after all. */
679
680 /* If this is a local symbol, we resolve it directly without
681 creating a procedure linkage table entry. */
682 if (h == NULL)
683 continue;
684
685 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
686 if (h->plt.refcount == -1)
687 h->plt.refcount = 1;
688 else
689 h->plt.refcount++;
690 break;
691
692 case R_VAX_PC8:
693 case R_VAX_PC16:
694 case R_VAX_PC32:
695 /* If we are creating a shared library and this is not a local
696 symbol, we need to copy the reloc into the shared library.
697 However when linking with -Bsymbolic and this is a global
698 symbol which is defined in an object we are including in the
699 link (i.e., DEF_REGULAR is set), then we can resolve the
700 reloc directly. At this point we have not seen all the input
701 files, so it is possible that DEF_REGULAR is not set now but
702 will be set later (it is never cleared). We account for that
703 possibility below by storing information in the
704 pcrel_relocs_copied field of the hash table entry. */
705 if (!(info->shared
706 && (sec->flags & SEC_ALLOC) != 0
707 && h != NULL
708 && (!info->symbolic
709 || (h->elf_link_hash_flags
710 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
711 {
712 if (h != NULL)
713 {
714 /* Make sure a plt entry is created for this symbol if
715 it turns out to be a function defined by a dynamic
716 object. */
717 if (h->plt.refcount == -1)
718 h->plt.refcount = 1;
719 else
720 h->plt.refcount++;
721 }
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)
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 const char *name;
749
750 name = (bfd_elf_string_from_elf_section
751 (abfd,
752 elf_elfheader (abfd)->e_shstrndx,
753 elf_section_data (sec)->rel_hdr.sh_name));
754 if (name == NULL)
755 return false;
756
757 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
758 && strcmp (bfd_get_section_name (abfd, sec),
759 name + 5) == 0);
760
761 sreloc = bfd_get_section_by_name (dynobj, name);
762 if (sreloc == NULL)
763 {
764 sreloc = bfd_make_section (dynobj, name);
765 if (sreloc == NULL
766 || !bfd_set_section_flags (dynobj, sreloc,
767 (SEC_ALLOC
768 | SEC_LOAD
769 | SEC_HAS_CONTENTS
770 | SEC_IN_MEMORY
771 | SEC_LINKER_CREATED
772 | SEC_READONLY))
773 || !bfd_set_section_alignment (dynobj, sreloc, 2))
774 return false;
775 }
776 if (sec->flags & SEC_READONLY)
777 info->flags |= DF_TEXTREL;
778 }
779
780 sreloc->_raw_size += sizeof (Elf32_External_Rela);
781
782 /* If we are linking with -Bsymbolic, we count the number of
783 PC relative relocations we have entered for this symbol,
784 so that we can discard them again if the symbol is later
785 defined by a regular object. Note that this function is
786 only called if we are using an vaxelf linker hash table,
787 which means that h is really a pointer to an
788 elf_vax_link_hash_entry. */
789 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
790 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
791 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
792 && info->symbolic)
793 {
794 struct elf_vax_link_hash_entry *eh;
795 struct elf_vax_pcrel_relocs_copied *p;
796
797 eh = (struct elf_vax_link_hash_entry *) h;
798
799 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
800 if (p->section == sreloc)
801 break;
802
803 if (p == NULL)
804 {
805 p = ((struct elf_vax_pcrel_relocs_copied *)
806 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
807 if (p == NULL)
808 return false;
809 p->next = eh->pcrel_relocs_copied;
810 eh->pcrel_relocs_copied = p;
811 p->section = sreloc;
812 p->count = 0;
813 }
814
815 ++p->count;
816 }
817 }
818
819 break;
820
821 /* This relocation describes the C++ object vtable hierarchy.
822 Reconstruct it for later use during GC. */
823 case R_VAX_GNU_VTINHERIT:
824 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
825 return false;
826 break;
827
828 /* This relocation describes which C++ vtable entries are actually
829 used. Record for later use during GC. */
830 case R_VAX_GNU_VTENTRY:
831 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
832 return false;
833 break;
834
835 default:
836 break;
837 }
838 }
839
840 return true;
841 }
842
843 /* Return the section that should be marked against GC for a given
844 relocation. */
845
846 static asection *
847 elf_vax_gc_mark_hook (sec, info, rel, h, sym)
848 asection *sec;
849 struct bfd_link_info *info ATTRIBUTE_UNUSED;
850 Elf_Internal_Rela *rel;
851 struct elf_link_hash_entry *h;
852 Elf_Internal_Sym *sym;
853 {
854 if (h != NULL)
855 {
856 switch (ELF32_R_TYPE (rel->r_info))
857 {
858 case R_VAX_GNU_VTINHERIT:
859 case R_VAX_GNU_VTENTRY:
860 break;
861
862 default:
863 switch (h->root.type)
864 {
865 default:
866 break;
867
868 case bfd_link_hash_defined:
869 case bfd_link_hash_defweak:
870 return h->root.u.def.section;
871
872 case bfd_link_hash_common:
873 return h->root.u.c.p->section;
874 }
875 }
876 }
877 else
878 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
879
880 return NULL;
881 }
882
883 /* Update the got entry reference counts for the section being removed. */
884
885 static boolean
886 elf_vax_gc_sweep_hook (abfd, info, sec, relocs)
887 bfd *abfd;
888 struct bfd_link_info *info;
889 asection *sec;
890 const Elf_Internal_Rela *relocs;
891 {
892 Elf_Internal_Shdr *symtab_hdr;
893 struct elf_link_hash_entry **sym_hashes;
894 const Elf_Internal_Rela *rel, *relend;
895 unsigned long r_symndx;
896 struct elf_link_hash_entry *h;
897 bfd *dynobj;
898
899 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
900 sym_hashes = elf_sym_hashes (abfd);
901
902 dynobj = elf_hash_table (info)->dynobj;
903 if (dynobj == NULL)
904 return true;
905
906 relend = relocs + sec->reloc_count;
907 for (rel = relocs; rel < relend; rel++)
908 {
909 switch (ELF32_R_TYPE (rel->r_info))
910 {
911 case R_VAX_GOT32:
912 r_symndx = ELF32_R_SYM (rel->r_info);
913 if (r_symndx >= symtab_hdr->sh_info)
914 {
915 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
916 if (h->got.refcount > 0)
917 --h->got.refcount;
918 }
919 break;
920
921 case R_VAX_PLT32:
922 case R_VAX_PC8:
923 case R_VAX_PC16:
924 case R_VAX_PC32:
925 case R_VAX_8:
926 case R_VAX_16:
927 case R_VAX_32:
928 r_symndx = ELF32_R_SYM (rel->r_info);
929 if (r_symndx >= symtab_hdr->sh_info)
930 {
931 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
932 if (h->plt.refcount > 0)
933 --h->plt.refcount;
934 }
935 break;
936
937 default:
938 break;
939 }
940 }
941
942 return true;
943 }
944
945 /* Adjust a symbol defined by a dynamic object and referenced by a
946 regular object. The current definition is in some section of the
947 dynamic object, but we're not including those sections. We have to
948 change the definition to something the rest of the link can
949 understand. */
950
951 static boolean
952 elf_vax_adjust_dynamic_symbol (info, h)
953 struct bfd_link_info *info;
954 struct elf_link_hash_entry *h;
955 {
956 bfd *dynobj;
957 asection *s;
958 unsigned int power_of_two;
959
960 dynobj = elf_hash_table (info)->dynobj;
961
962 /* Make sure we know what is going on here. */
963 BFD_ASSERT (dynobj != NULL
964 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
965 || h->weakdef != NULL
966 || ((h->elf_link_hash_flags
967 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
968 && (h->elf_link_hash_flags
969 & ELF_LINK_HASH_REF_REGULAR) != 0
970 && (h->elf_link_hash_flags
971 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
972
973 /* If this is a function, put it in the procedure linkage table. We
974 will fill in the contents of the procedure linkage table later,
975 when we know the address of the .got section. */
976 if (h->type == STT_FUNC
977 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
978 {
979 if (! info->shared
980 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
981 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
982 /* We must always create the plt entry if it was referenced
983 by a PLTxxO relocation. In this case we already recorded
984 it as a dynamic symbol. */
985 && h->dynindx == -1)
986 {
987 /* This case can occur if we saw a PLTxx reloc in an input
988 file, but the symbol was never referred to by a dynamic
989 object. In such a case, we don't actually need to build
990 a procedure linkage table, and we can just do a PCxx
991 reloc instead. */
992 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
993 h->plt.offset = (bfd_vma) -1;
994 return true;
995 }
996
997 /* GC may have rendered this entry unused. */
998 if (h->plt.refcount <= 0)
999 {
1000 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1001 h->plt.offset = (bfd_vma) -1;
1002 return true;
1003 }
1004
1005 /* Make sure this symbol is output as a dynamic symbol. */
1006 if (h->dynindx == -1)
1007 {
1008 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1009 return false;
1010 }
1011
1012 s = bfd_get_section_by_name (dynobj, ".plt");
1013 BFD_ASSERT (s != NULL);
1014
1015 /* If this is the first .plt entry, make room for the special
1016 first entry. */
1017 if (s->_raw_size == 0)
1018 {
1019 s->_raw_size += PLT_ENTRY_SIZE;
1020 }
1021
1022 /* If this symbol is not defined in a regular file, and we are
1023 not generating a shared library, then set the symbol to this
1024 location in the .plt. This is required to make function
1025 pointers compare as equal between the normal executable and
1026 the shared library. */
1027 if (!info->shared
1028 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1029 {
1030 h->root.u.def.section = s;
1031 h->root.u.def.value = s->_raw_size;
1032 }
1033
1034 h->plt.offset = s->_raw_size;
1035
1036 /* Make room for this entry. */
1037 s->_raw_size += PLT_ENTRY_SIZE;
1038
1039 /* We also need to make an entry in the .got.plt section, which
1040 will be placed in the .got section by the linker script. */
1041
1042 s = bfd_get_section_by_name (dynobj, ".got.plt");
1043 BFD_ASSERT (s != NULL);
1044 s->_raw_size += 4;
1045
1046 /* We also need to make an entry in the .rela.plt section. */
1047
1048 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1049 BFD_ASSERT (s != NULL);
1050 s->_raw_size += sizeof (Elf32_External_Rela);
1051
1052 return true;
1053 }
1054
1055 /* Reinitialize the plt offset now that it is not used as a reference
1056 count any more. */
1057 h->plt.offset = (bfd_vma) -1;
1058
1059 /* If this is a weak symbol, and there is a real definition, the
1060 processor independent code will have arranged for us to see the
1061 real definition first, and we can just use the same value. */
1062 if (h->weakdef != NULL)
1063 {
1064 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1065 || h->weakdef->root.type == bfd_link_hash_defweak);
1066 h->root.u.def.section = h->weakdef->root.u.def.section;
1067 h->root.u.def.value = h->weakdef->root.u.def.value;
1068 return true;
1069 }
1070
1071 /* This is a reference to a symbol defined by a dynamic object which
1072 is not a function. */
1073
1074 /* If we are creating a shared library, we must presume that the
1075 only references to the symbol are via the global offset table.
1076 For such cases we need not do anything here; the relocations will
1077 be handled correctly by relocate_section. */
1078 if (info->shared)
1079 return true;
1080
1081 /* We must allocate the symbol in our .dynbss section, which will
1082 become part of the .bss section of the executable. There will be
1083 an entry for this symbol in the .dynsym section. The dynamic
1084 object will contain position independent code, so all references
1085 from the dynamic object to this symbol will go through the global
1086 offset table. The dynamic linker will use the .dynsym entry to
1087 determine the address it must put in the global offset table, so
1088 both the dynamic object and the regular object will refer to the
1089 same memory location for the variable. */
1090
1091 s = bfd_get_section_by_name (dynobj, ".dynbss");
1092 BFD_ASSERT (s != NULL);
1093
1094 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1095 copy the initial value out of the dynamic object and into the
1096 runtime process image. We need to remember the offset into the
1097 .rela.bss section we are going to use. */
1098 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1099 {
1100 asection *srel;
1101
1102 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1103 BFD_ASSERT (srel != NULL);
1104 srel->_raw_size += sizeof (Elf32_External_Rela);
1105 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1106 }
1107
1108 /* We need to figure out the alignment required for this symbol. I
1109 have no idea how ELF linkers handle this. */
1110 power_of_two = bfd_log2 (h->size);
1111 if (power_of_two > 3)
1112 power_of_two = 3;
1113
1114 /* Apply the required alignment. */
1115 s->_raw_size = BFD_ALIGN (s->_raw_size,
1116 (bfd_size_type) (1 << power_of_two));
1117 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1118 {
1119 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
1120 return false;
1121 }
1122
1123 /* Define the symbol as being at this point in the section. */
1124 h->root.u.def.section = s;
1125 h->root.u.def.value = s->_raw_size;
1126
1127 /* Increment the section size to make room for the symbol. */
1128 s->_raw_size += h->size;
1129
1130 return true;
1131 }
1132
1133 /* Set the sizes of the dynamic sections. */
1134
1135 static boolean
1136 elf_vax_size_dynamic_sections (output_bfd, info)
1137 bfd *output_bfd;
1138 struct bfd_link_info *info;
1139 {
1140 bfd *dynobj;
1141 asection *s;
1142 boolean plt;
1143 boolean relocs;
1144 boolean reltext;
1145
1146 dynobj = elf_hash_table (info)->dynobj;
1147 BFD_ASSERT (dynobj != NULL);
1148
1149 if (elf_hash_table (info)->dynamic_sections_created)
1150 {
1151 /* Set the contents of the .interp section to the interpreter. */
1152 if (!info->shared)
1153 {
1154 s = bfd_get_section_by_name (dynobj, ".interp");
1155 BFD_ASSERT (s != NULL);
1156 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1157 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1158 }
1159 }
1160 else
1161 {
1162 /* We may have created entries in the .rela.got and .got sections.
1163 However, if we are not creating the dynamic sections, we will
1164 not actually use these entries. Reset the size of .rela.got
1165 and .got, which will cause it to get stripped from the output
1166 file below. */
1167 s = bfd_get_section_by_name (dynobj, ".rela.got");
1168 if (s != NULL)
1169 s->_raw_size = 0;
1170 s = bfd_get_section_by_name (dynobj, ".got.plt");
1171 if (s != NULL)
1172 s->_raw_size = 0;
1173 s = bfd_get_section_by_name (dynobj, ".got");
1174 if (s != NULL)
1175 s->_raw_size = 0;
1176 }
1177
1178 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1179 relative relocs against symbols defined in a regular object. We
1180 allocated space for them in the check_relocs routine, but we will not
1181 fill them in in the relocate_section routine. */
1182 if (info->shared && info->symbolic)
1183 elf_vax_link_hash_traverse (elf_vax_hash_table (info),
1184 elf_vax_discard_copies,
1185 (PTR) NULL);
1186
1187 /* If this is a -Bsymbolic shared link or a static link, we need to
1188 discard all the got entries we've recorded. Otherwise, we need to
1189 instantiate (allocate space for them). */
1190 elf_link_hash_traverse (elf_hash_table (info),
1191 elf_vax_instantiate_got_entries,
1192 (PTR) info);
1193
1194 /* The check_relocs and adjust_dynamic_symbol entry points have
1195 determined the sizes of the various dynamic sections. Allocate
1196 memory for them. */
1197 plt = false;
1198 relocs = false;
1199 reltext = false;
1200 for (s = dynobj->sections; s != NULL; s = s->next)
1201 {
1202 const char *name;
1203 boolean strip;
1204
1205 if ((s->flags & SEC_LINKER_CREATED) == 0)
1206 continue;
1207
1208 /* It's OK to base decisions on the section name, because none
1209 of the dynobj section names depend upon the input files. */
1210 name = bfd_get_section_name (dynobj, s);
1211
1212 strip = false;
1213
1214 if (strcmp (name, ".plt") == 0)
1215 {
1216 if (s->_raw_size == 0)
1217 {
1218 /* Strip this section if we don't need it; see the
1219 comment below. */
1220 strip = true;
1221 }
1222 else
1223 {
1224 /* Remember whether there is a PLT. */
1225 plt = true;
1226 }
1227 }
1228 else if (strncmp (name, ".rela", 5) == 0)
1229 {
1230 if (s->_raw_size == 0)
1231 {
1232 /* If we don't need this section, strip it from the
1233 output file. This is mostly to handle .rela.bss and
1234 .rela.plt. We must create both sections in
1235 create_dynamic_sections, because they must be created
1236 before the linker maps input sections to output
1237 sections. The linker does that before
1238 adjust_dynamic_symbol is called, and it is that
1239 function which decides whether anything needs to go
1240 into these sections. */
1241 strip = true;
1242 }
1243 else
1244 {
1245 asection *target;
1246
1247 /* Remember whether there are any reloc sections other
1248 than .rela.plt. */
1249 if (strcmp (name, ".rela.plt") != 0)
1250 {
1251 const char *outname;
1252
1253 relocs = true;
1254
1255 /* If this relocation section applies to a read only
1256 section, then we probably need a DT_TEXTREL
1257 entry. .rela.plt is actually associated with
1258 .got.plt, which is never readonly. */
1259 outname = bfd_get_section_name (output_bfd,
1260 s->output_section);
1261 target = bfd_get_section_by_name (output_bfd, outname + 5);
1262 if (target != NULL
1263 && (target->flags & SEC_READONLY) != 0
1264 && (target->flags & SEC_ALLOC) != 0)
1265 reltext = true;
1266 }
1267
1268 /* We use the reloc_count field as a counter if we need
1269 to copy relocs into the output file. */
1270 s->reloc_count = 0;
1271 }
1272 }
1273 else if (strncmp (name, ".got", 4) == 0)
1274 {
1275 if (s->_raw_size == 0)
1276 {
1277 /* Strip this section if we don't need it; see the
1278 comment below. */
1279 strip = true;
1280 }
1281 }
1282 else
1283 {
1284 /* It's not one of our sections, so don't allocate space. */
1285 continue;
1286 }
1287
1288 if (strip)
1289 {
1290 _bfd_strip_section_from_output (info, s);
1291 continue;
1292 }
1293
1294 /* Allocate memory for the section contents. */
1295 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
1296 if (s->contents == NULL && s->_raw_size != 0)
1297 return false;
1298 }
1299
1300 if (elf_hash_table (info)->dynamic_sections_created)
1301 {
1302 /* Add some entries to the .dynamic section. We fill in the
1303 values later, in elf_vax_finish_dynamic_sections, but we
1304 must add the entries now so that we get the correct size for
1305 the .dynamic section. The DT_DEBUG entry is filled in by the
1306 dynamic linker and used by the debugger. */
1307 #define add_dynamic_entry(TAG, VAL) \
1308 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1309
1310 if (!info->shared)
1311 {
1312 if (!add_dynamic_entry (DT_DEBUG, 0))
1313 return false;
1314 }
1315
1316 if (plt)
1317 {
1318 if (!add_dynamic_entry (DT_PLTGOT, 0)
1319 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1320 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1321 || !add_dynamic_entry (DT_JMPREL, 0))
1322 return false;
1323 }
1324
1325 if (relocs)
1326 {
1327 if (!add_dynamic_entry (DT_RELA, 0)
1328 || !add_dynamic_entry (DT_RELASZ, 0)
1329 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1330 return false;
1331 }
1332
1333 if (reltext || (info->flags & DF_TEXTREL) != 0)
1334 {
1335 if (!add_dynamic_entry (DT_TEXTREL, 0))
1336 return false;
1337 }
1338 }
1339 #undef add_dynamic_entry
1340
1341 return true;
1342 }
1343
1344 /* This function is called via elf_vax_link_hash_traverse if we are
1345 creating a shared object with -Bsymbolic. It discards the space
1346 allocated to copy PC relative relocs against symbols which are defined
1347 in regular objects. We allocated space for them in the check_relocs
1348 routine, but we won't fill them in in the relocate_section routine. */
1349
1350 /*ARGSUSED*/
1351 static boolean
1352 elf_vax_discard_copies (h, ignore)
1353 struct elf_vax_link_hash_entry *h;
1354 PTR ignore ATTRIBUTE_UNUSED;
1355 {
1356 struct elf_vax_pcrel_relocs_copied *s;
1357
1358 if (h->root.root.type == bfd_link_hash_warning)
1359 h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
1360
1361 /* We only discard relocs for symbols defined in a regular object. */
1362 if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1363 return true;
1364
1365 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1366 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela);
1367
1368 return true;
1369 }
1370
1371 /* This function is called via elf_link_hash_traverse. It looks for entries
1372 that have GOT or PLT (.GOT) references. If creating a static object or a
1373 shared object with -Bsymbolic, it resets the reference count back to 0
1374 and sets the offset to -1 so normal PC32 relocation will be done. If
1375 creating a shared object or executable, space in the .got and .rela.got
1376 will be reserved for the symbol. */
1377
1378 /*ARGSUSED*/
1379 static boolean
1380 elf_vax_instantiate_got_entries (h, infoptr)
1381 struct elf_link_hash_entry *h;
1382 PTR infoptr;
1383 {
1384 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1385 bfd *dynobj;
1386 asection *sgot;
1387 asection *srelgot;
1388
1389 /* We don't care about non-GOT (and non-PLT) entries. */
1390 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1391 return true;
1392
1393 dynobj = elf_hash_table (info)->dynobj;
1394 if (dynobj == NULL)
1395 return true;
1396
1397 sgot = bfd_get_section_by_name (dynobj, ".got");
1398 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1399
1400 if (!elf_hash_table (info)->dynamic_sections_created
1401 || (info->shared && info->symbolic))
1402 {
1403 h->got.refcount = 0;
1404 h->got.offset = (bfd_vma) -1;
1405 h->plt.refcount = 0;
1406 h->plt.offset = (bfd_vma) -1;
1407 }
1408 else if (h->got.refcount > 0)
1409 {
1410 /* Make sure this symbol is output as a dynamic symbol. */
1411 if (h->dynindx == -1)
1412 {
1413 if (!bfd_elf32_link_record_dynamic_symbol (info, h))
1414 return false;
1415 }
1416
1417 /* Allocate space in the .got and .rela.got sections. */
1418 sgot->_raw_size += 4;
1419 srelgot->_raw_size += sizeof (Elf32_External_Rela);
1420 }
1421
1422 return true;
1423 }
1424
1425 /* Relocate an VAX ELF section. */
1426
1427 static boolean
1428 elf_vax_relocate_section (output_bfd, info, input_bfd, input_section,
1429 contents, relocs, local_syms, local_sections)
1430 bfd *output_bfd;
1431 struct bfd_link_info *info;
1432 bfd *input_bfd;
1433 asection *input_section;
1434 bfd_byte *contents;
1435 Elf_Internal_Rela *relocs;
1436 Elf_Internal_Sym *local_syms;
1437 asection **local_sections;
1438 {
1439 bfd *dynobj;
1440 Elf_Internal_Shdr *symtab_hdr;
1441 struct elf_link_hash_entry **sym_hashes;
1442 bfd_vma *local_got_offsets;
1443 bfd_vma plt_index;
1444 bfd_vma got_offset;
1445 asection *sgot;
1446 asection *splt;
1447 asection *sgotplt;
1448 asection *sreloc;
1449 Elf_Internal_Rela *rel;
1450 Elf_Internal_Rela *relend;
1451
1452 if (info->relocateable)
1453 return true;
1454
1455 dynobj = elf_hash_table (info)->dynobj;
1456 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1457 sym_hashes = elf_sym_hashes (input_bfd);
1458 local_got_offsets = elf_local_got_offsets (input_bfd);
1459
1460 sgot = NULL;
1461 splt = NULL;
1462 sgotplt = NULL;
1463 sreloc = NULL;
1464
1465 rel = relocs;
1466 relend = relocs + input_section->reloc_count;
1467 for (; rel < relend; rel++)
1468 {
1469 int r_type;
1470 reloc_howto_type *howto;
1471 unsigned long r_symndx;
1472 struct elf_link_hash_entry *h;
1473 Elf_Internal_Sym *sym;
1474 asection *sec;
1475 bfd_vma relocation;
1476 bfd_reloc_status_type r;
1477
1478 r_type = ELF32_R_TYPE (rel->r_info);
1479 if (r_type < 0 || r_type >= (int) R_VAX_max)
1480 {
1481 bfd_set_error (bfd_error_bad_value);
1482 return false;
1483 }
1484 howto = howto_table + r_type;
1485
1486 /* This is a final link. */
1487 r_symndx = ELF32_R_SYM (rel->r_info);
1488 h = NULL;
1489 sym = NULL;
1490 sec = NULL;
1491 if (r_symndx < symtab_hdr->sh_info)
1492 {
1493 sym = local_syms + r_symndx;
1494 sec = local_sections[r_symndx];
1495 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
1496 }
1497 else
1498 {
1499 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1500 while (h->root.type == bfd_link_hash_indirect
1501 || h->root.type == bfd_link_hash_warning)
1502 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1503 if (h->root.type == bfd_link_hash_defined
1504 || h->root.type == bfd_link_hash_defweak)
1505 {
1506 sec = h->root.u.def.section;
1507 if ((r_type == R_VAX_PLT32
1508 && h->plt.offset != (bfd_vma) -1
1509 && elf_hash_table (info)->dynamic_sections_created)
1510 || (r_type == R_VAX_GOT32
1511 && strcmp (h->root.root.string,
1512 "_GLOBAL_OFFSET_TABLE_") != 0
1513 && elf_hash_table (info)->dynamic_sections_created
1514 && (! info->shared
1515 || (! info->symbolic && h->dynindx != -1)
1516 || (h->elf_link_hash_flags
1517 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1518 || (info->shared
1519 && ((! info->symbolic && h->dynindx != -1)
1520 || (h->elf_link_hash_flags
1521 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1522 && ((input_section->flags & SEC_ALLOC) != 0
1523 /* DWARF will emit R_VAX_32 relocations in its
1524 sections against symbols defined externally
1525 in shared libraries. We can't do anything
1526 with them here. */
1527
1528 || ((input_section->flags & SEC_DEBUGGING) != 0
1529 && (h->elf_link_hash_flags
1530 & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
1531 && (r_type == R_VAX_8
1532 || r_type == R_VAX_16
1533 || r_type == R_VAX_32
1534 || r_type == R_VAX_PC8
1535 || r_type == R_VAX_PC16
1536 || r_type == R_VAX_PC32)))
1537 {
1538 /* In these cases, we don't need the relocation
1539 value. We check specially because in some
1540 obscure cases sec->output_section will be NULL. */
1541 relocation = 0;
1542 }
1543 else
1544 relocation = (h->root.u.def.value
1545 + sec->output_section->vma
1546 + sec->output_offset);
1547 }
1548 else if (h->root.type == bfd_link_hash_undefweak)
1549 relocation = 0;
1550 else if (info->shared
1551 && (!info->symbolic || info->allow_shlib_undefined)
1552 && !info->no_undefined
1553 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
1554 relocation = 0;
1555 else
1556 {
1557 if (!(info->callbacks->undefined_symbol
1558 (info, h->root.root.string, input_bfd,
1559 input_section, rel->r_offset,
1560 (!info->shared || info->no_undefined
1561 || ELF_ST_VISIBILITY (h->other)))))
1562 return false;
1563 relocation = 0;
1564 }
1565 }
1566
1567 switch (r_type)
1568 {
1569 case R_VAX_GOT32:
1570 /* Relocation is to the address of the entry for this symbol
1571 in the global offset table. */
1572 if (h == NULL || h->got.offset == (bfd_vma) -1)
1573 break;
1574
1575 /* Relocation is the offset of the entry for this symbol in
1576 the global offset table. */
1577
1578 {
1579 bfd_vma off;
1580
1581 if (sgot == NULL)
1582 {
1583 sgot = bfd_get_section_by_name (dynobj, ".got");
1584 BFD_ASSERT (sgot != NULL);
1585 }
1586
1587 BFD_ASSERT (h != NULL);
1588 off = h->got.offset;
1589 BFD_ASSERT (off != (bfd_vma) -1);
1590 BFD_ASSERT (off < sgot->_raw_size);
1591
1592 if (info->shared
1593 && h->dynindx == -1
1594 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
1595 {
1596 /* The symbol was forced to be local
1597 because of a version file.. We must initialize
1598 this entry in the global offset table. Since
1599 the offset must always be a multiple of 4, we
1600 use the least significant bit to record whether
1601 we have initialized it already.
1602
1603 When doing a dynamic link, we create a .rela.got
1604 relocation entry to initialize the value. This
1605 is done in the finish_dynamic_symbol routine. */
1606 if ((off & 1) != 0)
1607 off &= ~1;
1608 else
1609 {
1610 bfd_put_32 (output_bfd, relocation + rel->r_addend,
1611 sgot->contents + off);
1612 h->got.offset |= 1;
1613 }
1614 } else {
1615 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1616 }
1617
1618 relocation = sgot->output_offset + off;
1619 /* The GOT relocation uses the addend. */
1620 rel->r_addend = 0;
1621
1622 /* Change the reference to be indirect. */
1623 contents[rel->r_offset - 1] |= 0x10;
1624 relocation += sgot->output_section->vma;
1625 }
1626 break;
1627
1628 case R_VAX_PLT32:
1629 /* Relocation is to the entry for this symbol in the
1630 procedure linkage table. */
1631
1632 /* Resolve a PLTxx reloc against a local symbol directly,
1633 without using the procedure linkage table. */
1634 if (h == NULL)
1635 break;
1636
1637 if (h->plt.offset == (bfd_vma) -1
1638 || !elf_hash_table (info)->dynamic_sections_created)
1639 {
1640 /* We didn't make a PLT entry for this symbol. This
1641 happens when statically linking PIC code, or when
1642 using -Bsymbolic. */
1643 break;
1644 }
1645
1646 if (splt == NULL)
1647 {
1648 splt = bfd_get_section_by_name (dynobj, ".plt");
1649 BFD_ASSERT (splt != NULL);
1650 }
1651
1652 if (sgotplt == NULL)
1653 {
1654 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1655 BFD_ASSERT (splt != NULL);
1656 }
1657
1658 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1659
1660 /* Get the offset into the .got table of the entry that
1661 corresponds to this function. Each .got entry is 4 bytes.
1662 The first two are reserved. */
1663 got_offset = (plt_index + 3) * 4;
1664
1665 /* We want the relocate to point into the .got.plt instead
1666 of the plt itself. */
1667 relocation = (sgotplt->output_section->vma
1668 + sgotplt->output_offset
1669 + got_offset);
1670 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1671 if (rel->r_addend == 2)
1672 {
1673 h->plt.offset |= 1;
1674 }
1675 else if (rel->r_addend != 0)
1676 (*_bfd_error_handler)
1677 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1678 bfd_get_filename (input_bfd), rel->r_addend,
1679 h->root.root.string,
1680 bfd_get_section_name (input_bfd, input_section));
1681 rel->r_addend = 0;
1682
1683 break;
1684
1685 case R_VAX_PC8:
1686 case R_VAX_PC16:
1687 case R_VAX_PC32:
1688 if (h == NULL)
1689 break;
1690 /* Fall through. */
1691 case R_VAX_8:
1692 case R_VAX_16:
1693 case R_VAX_32:
1694 if (info->shared
1695 && r_symndx != 0
1696 && (input_section->flags & SEC_ALLOC) != 0
1697 && ((r_type != R_VAX_PC8
1698 && r_type != R_VAX_PC16
1699 && r_type != R_VAX_PC32)
1700 || (!info->symbolic
1701 || (h->elf_link_hash_flags
1702 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1703 {
1704 Elf_Internal_Rela outrel;
1705 boolean skip, relocate;
1706
1707 /* When generating a shared object, these relocations
1708 are copied into the output file to be resolved at run
1709 time. */
1710
1711 if (sreloc == NULL)
1712 {
1713 const char *name;
1714
1715 name = (bfd_elf_string_from_elf_section
1716 (input_bfd,
1717 elf_elfheader (input_bfd)->e_shstrndx,
1718 elf_section_data (input_section)->rel_hdr.sh_name));
1719 if (name == NULL)
1720 return false;
1721
1722 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1723 && strcmp (bfd_get_section_name (input_bfd,
1724 input_section),
1725 name + 5) == 0);
1726
1727 sreloc = bfd_get_section_by_name (dynobj, name);
1728 BFD_ASSERT (sreloc != NULL);
1729 }
1730
1731 skip = false;
1732 relocate = false;
1733
1734 outrel.r_offset =
1735 _bfd_elf_section_offset (output_bfd, info, input_section,
1736 rel->r_offset);
1737 if (outrel.r_offset == (bfd_vma) -1)
1738 skip = true;
1739 if (outrel.r_offset == (bfd_vma) -2)
1740 skip = true, relocate = true;
1741 outrel.r_offset += (input_section->output_section->vma
1742 + input_section->output_offset);
1743
1744 if (skip)
1745 memset (&outrel, 0, sizeof outrel);
1746 /* h->dynindx may be -1 if the symbol was marked to
1747 become local. */
1748 else if (h != NULL
1749 && ((! info->symbolic && h->dynindx != -1)
1750 || (h->elf_link_hash_flags
1751 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1752 {
1753 BFD_ASSERT (h->dynindx != -1);
1754 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1755 outrel.r_addend = relocation + rel->r_addend;
1756 }
1757 else
1758 {
1759 if (r_type == R_VAX_32)
1760 {
1761 relocate = true;
1762 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1763 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1764 &contents[rel->r_offset]) == 0);
1765 outrel.r_addend = relocation + rel->r_addend;
1766 }
1767 else
1768 {
1769 long indx;
1770
1771 if (h == NULL)
1772 sec = local_sections[r_symndx];
1773 else
1774 {
1775 BFD_ASSERT (h->root.type == bfd_link_hash_defined
1776 || (h->root.type
1777 == bfd_link_hash_defweak));
1778 sec = h->root.u.def.section;
1779 }
1780 if (sec != NULL && bfd_is_abs_section (sec))
1781 indx = 0;
1782 else if (sec == NULL || sec->owner == NULL)
1783 {
1784 bfd_set_error (bfd_error_bad_value);
1785 return false;
1786 }
1787 else
1788 {
1789 asection *osec;
1790
1791 osec = sec->output_section;
1792 indx = elf_section_data (osec)->dynindx;
1793 BFD_ASSERT (indx > 0);
1794 }
1795
1796 outrel.r_info = ELF32_R_INFO (indx, r_type);
1797 outrel.r_addend = relocation + rel->r_addend;
1798 }
1799 }
1800
1801 if (!strcmp (bfd_get_section_name (input_bfd, input_section),
1802 ".text") != 0 ||
1803 (info->shared
1804 && ELF32_R_TYPE(outrel.r_info) != R_VAX_32
1805 && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
1806 && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
1807 && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
1808 && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
1809 {
1810 if (h != NULL)
1811 (*_bfd_error_handler)
1812 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1813 bfd_get_filename (input_bfd), howto->name,
1814 h->root.root.string,
1815 bfd_get_section_name (input_bfd, input_section));
1816 else
1817 (*_bfd_error_handler)
1818 (_("%s: warning: %s relocation to 0x%x from %s section"),
1819 bfd_get_filename (input_bfd), howto->name,
1820 outrel.r_addend,
1821 bfd_get_section_name (input_bfd, input_section));
1822 }
1823 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1824 (((Elf32_External_Rela *)
1825 sreloc->contents)
1826 + sreloc->reloc_count));
1827 ++sreloc->reloc_count;
1828
1829 /* This reloc will be computed at runtime, so there's no
1830 need to do anything now, except for R_VAX_32
1831 relocations that have been turned into
1832 R_VAX_RELATIVE. */
1833 if (!relocate)
1834 continue;
1835 }
1836
1837 break;
1838
1839 case R_VAX_GNU_VTINHERIT:
1840 case R_VAX_GNU_VTENTRY:
1841 /* These are no-ops in the end. */
1842 continue;
1843
1844 default:
1845 break;
1846 }
1847
1848 /* VAX PCREL relocations are from the end of relocation, not the start.
1849 So subtract the difference from the relocation amount since we can't
1850 add it to the offset. */
1851 if (howto->pc_relative && howto->pcrel_offset)
1852 relocation -= bfd_get_reloc_size(howto);
1853
1854 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1855 contents, rel->r_offset,
1856 relocation, rel->r_addend);
1857
1858 if (r != bfd_reloc_ok)
1859 {
1860 switch (r)
1861 {
1862 default:
1863 case bfd_reloc_outofrange:
1864 abort ();
1865 case bfd_reloc_overflow:
1866 {
1867 const char *name;
1868
1869 if (h != NULL)
1870 name = h->root.root.string;
1871 else
1872 {
1873 name = bfd_elf_string_from_elf_section (input_bfd,
1874 symtab_hdr->sh_link,
1875 sym->st_name);
1876 if (name == NULL)
1877 return false;
1878 if (*name == '\0')
1879 name = bfd_section_name (input_bfd, sec);
1880 }
1881 if (!(info->callbacks->reloc_overflow
1882 (info, name, howto->name, (bfd_vma) 0,
1883 input_bfd, input_section, rel->r_offset)))
1884 return false;
1885 }
1886 break;
1887 }
1888 }
1889 }
1890
1891 return true;
1892 }
1893
1894 /* Finish up dynamic symbol handling. We set the contents of various
1895 dynamic sections here. */
1896
1897 static boolean
1898 elf_vax_finish_dynamic_symbol (output_bfd, info, h, sym)
1899 bfd *output_bfd;
1900 struct bfd_link_info *info;
1901 struct elf_link_hash_entry *h;
1902 Elf_Internal_Sym *sym;
1903 {
1904 bfd *dynobj;
1905
1906 dynobj = elf_hash_table (info)->dynobj;
1907
1908 if (h->plt.offset != (bfd_vma) -1)
1909 {
1910 asection *splt;
1911 asection *sgot;
1912 asection *srela;
1913 bfd_vma plt_index;
1914 bfd_vma got_offset;
1915 bfd_vma addend;
1916 Elf_Internal_Rela rela;
1917
1918 /* This symbol has an entry in the procedure linkage table. Set
1919 it up. */
1920
1921 BFD_ASSERT (h->dynindx != -1);
1922
1923 splt = bfd_get_section_by_name (dynobj, ".plt");
1924 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1925 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1926 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1927
1928 addend = 2 * (h->plt.offset & 1);
1929 h->plt.offset &= ~1;
1930
1931 /* Get the index in the procedure linkage table which
1932 corresponds to this symbol. This is the index of this symbol
1933 in all the symbols for which we are making plt entries. The
1934 first entry in the procedure linkage table is reserved. */
1935 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1936
1937 /* Get the offset into the .got table of the entry that
1938 corresponds to this function. Each .got entry is 4 bytes.
1939 The first two are reserved. */
1940 got_offset = (plt_index + 3) * 4;
1941
1942 /* Fill in the entry in the procedure linkage table. */
1943 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1944 PLT_ENTRY_SIZE);
1945
1946 /* The offset is relative to the first extension word. */
1947 bfd_put_32 (output_bfd,
1948 -(h->plt.offset + 8),
1949 splt->contents + h->plt.offset + 4);
1950
1951 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1952 splt->contents + h->plt.offset + 8);
1953
1954 /* Fill in the entry in the global offset table. */
1955 bfd_put_32 (output_bfd,
1956 (splt->output_section->vma
1957 + splt->output_offset
1958 + h->plt.offset) + addend,
1959 sgot->contents + got_offset);
1960
1961 /* Fill in the entry in the .rela.plt section. */
1962 rela.r_offset = (sgot->output_section->vma
1963 + sgot->output_offset
1964 + got_offset);
1965 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1966 rela.r_addend = addend;
1967 bfd_elf32_swap_reloca_out (output_bfd, &rela,
1968 ((Elf32_External_Rela *) srela->contents
1969 + plt_index));
1970
1971 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1972 {
1973 /* Mark the symbol as undefined, rather than as defined in
1974 the .plt section. Leave the value alone. */
1975 sym->st_shndx = SHN_UNDEF;
1976 }
1977 }
1978
1979 if (h->got.offset != (bfd_vma) -1)
1980 {
1981 asection *sgot;
1982 asection *srela;
1983 Elf_Internal_Rela rela;
1984
1985 /* This symbol has an entry in the global offset table. Set it
1986 up. */
1987
1988 sgot = bfd_get_section_by_name (dynobj, ".got");
1989 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1990 BFD_ASSERT (sgot != NULL && srela != NULL);
1991
1992 rela.r_offset = (sgot->output_section->vma
1993 + sgot->output_offset
1994 + (h->got.offset &~ 1));
1995
1996 /* If the symbol was forced to be local because of a version file
1997 locally we just want to emit a RELATIVE reloc. The entry in
1998 the global offset table will already have been initialized in
1999 the relocate_section function. */
2000 if (info->shared
2001 && h->dynindx == -1
2002 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2003 {
2004 rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
2005 }
2006 else
2007 {
2008 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
2009 }
2010 rela.r_addend = bfd_get_signed_32 (output_bfd,
2011 (sgot->contents
2012 + (h->got.offset & ~1)));
2013
2014 bfd_elf32_swap_reloca_out (output_bfd, &rela,
2015 ((Elf32_External_Rela *) srela->contents
2016 + srela->reloc_count));
2017 ++srela->reloc_count;
2018 }
2019
2020 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2021 {
2022 asection *s;
2023 Elf_Internal_Rela rela;
2024
2025 /* This symbol needs a copy reloc. Set it up. */
2026
2027 BFD_ASSERT (h->dynindx != -1
2028 && (h->root.type == bfd_link_hash_defined
2029 || h->root.type == bfd_link_hash_defweak));
2030
2031 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2032 ".rela.bss");
2033 BFD_ASSERT (s != NULL);
2034
2035 rela.r_offset = (h->root.u.def.value
2036 + h->root.u.def.section->output_section->vma
2037 + h->root.u.def.section->output_offset);
2038 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
2039 rela.r_addend = 0;
2040 bfd_elf32_swap_reloca_out (output_bfd, &rela,
2041 ((Elf32_External_Rela *) s->contents
2042 + s->reloc_count));
2043 ++s->reloc_count;
2044 }
2045
2046 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2047 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2048 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2049 sym->st_shndx = SHN_ABS;
2050
2051 return true;
2052 }
2053
2054 /* Finish up the dynamic sections. */
2055
2056 static boolean
2057 elf_vax_finish_dynamic_sections (output_bfd, info)
2058 bfd *output_bfd;
2059 struct bfd_link_info *info;
2060 {
2061 bfd *dynobj;
2062 asection *sgot;
2063 asection *sdyn;
2064
2065 dynobj = elf_hash_table (info)->dynobj;
2066
2067 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2068 BFD_ASSERT (sgot != NULL);
2069 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2070
2071 if (elf_hash_table (info)->dynamic_sections_created)
2072 {
2073 asection *splt;
2074 Elf32_External_Dyn *dyncon, *dynconend;
2075
2076 splt = bfd_get_section_by_name (dynobj, ".plt");
2077 BFD_ASSERT (splt != NULL && sdyn != NULL);
2078
2079 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2080 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2081 for (; dyncon < dynconend; dyncon++)
2082 {
2083 Elf_Internal_Dyn dyn;
2084 const char *name;
2085 asection *s;
2086
2087 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2088
2089 switch (dyn.d_tag)
2090 {
2091 default:
2092 break;
2093
2094 case DT_PLTGOT:
2095 name = ".got";
2096 goto get_vma;
2097 case DT_JMPREL:
2098 name = ".rela.plt";
2099 get_vma:
2100 s = bfd_get_section_by_name (output_bfd, name);
2101 BFD_ASSERT (s != NULL);
2102 dyn.d_un.d_ptr = s->vma;
2103 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2104 break;
2105
2106 case DT_PLTRELSZ:
2107 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2108 BFD_ASSERT (s != NULL);
2109 if (s->_cooked_size != 0)
2110 dyn.d_un.d_val = s->_cooked_size;
2111 else
2112 dyn.d_un.d_val = s->_raw_size;
2113 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2114 break;
2115
2116 case DT_RELASZ:
2117 /* The procedure linkage table relocs (DT_JMPREL) should
2118 not be included in the overall relocs (DT_RELA).
2119 Therefore, we override the DT_RELASZ entry here to
2120 make it not include the JMPREL relocs. Since the
2121 linker script arranges for .rela.plt to follow all
2122 other relocation sections, we don't have to worry
2123 about changing the DT_RELA entry. */
2124 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2125 if (s != NULL)
2126 {
2127 if (s->_cooked_size != 0)
2128 dyn.d_un.d_val -= s->_cooked_size;
2129 else
2130 dyn.d_un.d_val -= s->_raw_size;
2131 }
2132 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2133 break;
2134 }
2135 }
2136
2137 /* Fill in the first entry in the procedure linkage table. */
2138 if (splt->_raw_size > 0)
2139 {
2140 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
2141 bfd_put_32 (output_bfd,
2142 (sgot->output_section->vma
2143 + sgot->output_offset + 4
2144 - (splt->output_section->vma + 6)),
2145 splt->contents + 2);
2146 bfd_put_32 (output_bfd,
2147 (sgot->output_section->vma
2148 + sgot->output_offset + 8
2149 - (splt->output_section->vma + 12)),
2150 splt->contents + 8);
2151 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2152 = PLT_ENTRY_SIZE;
2153 }
2154 }
2155
2156 /* Fill in the first three entries in the global offset table. */
2157 if (sgot->_raw_size > 0)
2158 {
2159 if (sdyn == NULL)
2160 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2161 else
2162 bfd_put_32 (output_bfd,
2163 sdyn->output_section->vma + sdyn->output_offset,
2164 sgot->contents);
2165 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2166 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2167 }
2168
2169 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2170
2171 return true;
2172 }
2173
2174 #define TARGET_LITTLE_SYM bfd_elf32_vax_vec
2175 #define TARGET_LITTLE_NAME "elf32-vax"
2176 #define ELF_MACHINE_CODE EM_VAX
2177 #define ELF_MAXPAGESIZE 0x1000
2178
2179 #define elf_backend_create_dynamic_sections \
2180 _bfd_elf_create_dynamic_sections
2181 #define bfd_elf32_bfd_link_hash_table_create \
2182 elf_vax_link_hash_table_create
2183 #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
2184
2185 #define elf_backend_check_relocs elf_vax_check_relocs
2186 #define elf_backend_adjust_dynamic_symbol \
2187 elf_vax_adjust_dynamic_symbol
2188 #define elf_backend_size_dynamic_sections \
2189 elf_vax_size_dynamic_sections
2190 #define elf_backend_relocate_section elf_vax_relocate_section
2191 #define elf_backend_finish_dynamic_symbol \
2192 elf_vax_finish_dynamic_symbol
2193 #define elf_backend_finish_dynamic_sections \
2194 elf_vax_finish_dynamic_sections
2195 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2196 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2197 #define bfd_elf32_bfd_merge_private_bfd_data \
2198 elf32_vax_merge_private_bfd_data
2199 #define bfd_elf32_bfd_set_private_flags \
2200 elf32_vax_set_private_flags
2201 #define bfd_elf32_bfd_print_private_bfd_data \
2202 elf32_vax_print_private_bfd_data
2203
2204 #define elf_backend_can_gc_sections 1
2205 #define elf_backend_want_got_plt 1
2206 #define elf_backend_plt_readonly 1
2207 #define elf_backend_want_plt_sym 0
2208 #define elf_backend_got_header_size 16
2209 #define elf_backend_rela_normal 1
2210
2211 #include "elf32-target.h"