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Add --no-dynamic-linker option to ld, for static PIE use
[thirdparty/binutils-gdb.git] / bfd / elf32-vax.c
1 /* VAX series support for 32-bit ELF
2 Copyright (C) 1993-2015 Free Software Foundation, Inc.
3 Contributed by Matt Thomas <matt@3am-software.com>.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/vax.h"
28
29 static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
30 static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
31 static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
32 struct bfd_hash_table *,
33 const char *);
34 static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
35 static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
36 asection *, const Elf_Internal_Rela *);
37 static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
38 struct elf_link_hash_entry *);
39 static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
40 static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
41 bfd *, asection *, bfd_byte *,
42 Elf_Internal_Rela *,
43 Elf_Internal_Sym *, asection **);
44 static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
45 struct elf_link_hash_entry *,
46 Elf_Internal_Sym *);
47 static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
48 struct bfd_link_info *);
49 static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *,
50 const arelent *);
51
52 static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
53 static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
54 static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, void *);
55
56 static reloc_howto_type howto_table[] = {
57 HOWTO (R_VAX_NONE, /* type */
58 0, /* rightshift */
59 3, /* size (0 = byte, 1 = short, 2 = long) */
60 0, /* bitsize */
61 FALSE, /* pc_relative */
62 0, /* bitpos */
63 complain_overflow_dont, /* complain_on_overflow */
64 bfd_elf_generic_reloc, /* special_function */
65 "R_VAX_NONE", /* name */
66 FALSE, /* partial_inplace */
67 0, /* src_mask */
68 0x00000000, /* dst_mask */
69 FALSE), /* pcrel_offset */
70
71 HOWTO (R_VAX_32, /* type */
72 0, /* rightshift */
73 2, /* size (0 = byte, 1 = short, 2 = long) */
74 32, /* bitsize */
75 FALSE, /* pc_relative */
76 0, /* bitpos */
77 complain_overflow_bitfield, /* complain_on_overflow */
78 bfd_elf_generic_reloc, /* special_function */
79 "R_VAX_32", /* name */
80 FALSE, /* partial_inplace */
81 0, /* src_mask */
82 0xffffffff, /* dst_mask */
83 FALSE), /* pcrel_offset */
84
85 HOWTO (R_VAX_16, /* type */
86 0, /* rightshift */
87 1, /* size (0 = byte, 1 = short, 2 = long) */
88 16, /* bitsize */
89 FALSE, /* pc_relative */
90 0, /* bitpos */
91 complain_overflow_bitfield, /* complain_on_overflow */
92 bfd_elf_generic_reloc, /* special_function */
93 "R_VAX_16", /* name */
94 FALSE, /* partial_inplace */
95 0, /* src_mask */
96 0x0000ffff, /* dst_mask */
97 FALSE), /* pcrel_offset */
98
99 HOWTO (R_VAX_8, /* type */
100 0, /* rightshift */
101 0, /* size (0 = byte, 1 = short, 2 = long) */
102 8, /* bitsize */
103 FALSE, /* pc_relative */
104 0, /* bitpos */
105 complain_overflow_bitfield, /* complain_on_overflow */
106 bfd_elf_generic_reloc, /* special_function */
107 "R_VAX_8", /* name */
108 FALSE, /* partial_inplace */
109 0, /* src_mask */
110 0x000000ff, /* dst_mask */
111 FALSE), /* pcrel_offset */
112
113 HOWTO (R_VAX_PC32, /* type */
114 0, /* rightshift */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
116 32, /* bitsize */
117 TRUE, /* pc_relative */
118 0, /* bitpos */
119 complain_overflow_bitfield, /* complain_on_overflow */
120 bfd_elf_generic_reloc, /* special_function */
121 "R_VAX_PC32", /* name */
122 FALSE, /* partial_inplace */
123 0, /* src_mask */
124 0xffffffff, /* dst_mask */
125 TRUE), /* pcrel_offset */
126
127 HOWTO (R_VAX_PC16, /* type */
128 0, /* rightshift */
129 1, /* size (0 = byte, 1 = short, 2 = long) */
130 16, /* bitsize */
131 TRUE, /* pc_relative */
132 0, /* bitpos */
133 complain_overflow_signed, /* complain_on_overflow */
134 bfd_elf_generic_reloc, /* special_function */
135 "R_VAX_PC16", /* name */
136 FALSE, /* partial_inplace */
137 0, /* src_mask */
138 0x0000ffff, /* dst_mask */
139 TRUE), /* pcrel_offset */
140
141 HOWTO (R_VAX_PC8, /* type */
142 0, /* rightshift */
143 0, /* size (0 = byte, 1 = short, 2 = long) */
144 8, /* bitsize */
145 TRUE, /* pc_relative */
146 0, /* bitpos */
147 complain_overflow_signed, /* complain_on_overflow */
148 bfd_elf_generic_reloc, /* special_function */
149 "R_VAX_PC8", /* name */
150 FALSE, /* partial_inplace */
151 0, /* src_mask */
152 0x000000ff, /* dst_mask */
153 TRUE), /* pcrel_offset */
154
155 HOWTO (R_VAX_GOT32, /* type */
156 0, /* rightshift */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
158 32, /* bitsize */
159 TRUE, /* pc_relative */
160 0, /* bitpos */
161 complain_overflow_bitfield, /* complain_on_overflow */
162 bfd_elf_generic_reloc, /* special_function */
163 "R_VAX_GOT32", /* name */
164 FALSE, /* partial_inplace */
165 0, /* src_mask */
166 0xffffffff, /* dst_mask */
167 TRUE), /* pcrel_offset */
168
169 EMPTY_HOWTO (-1),
170 EMPTY_HOWTO (-1),
171 EMPTY_HOWTO (-1),
172 EMPTY_HOWTO (-1),
173 EMPTY_HOWTO (-1),
174
175 HOWTO (R_VAX_PLT32, /* type */
176 0, /* rightshift */
177 2, /* size (0 = byte, 1 = short, 2 = long) */
178 32, /* bitsize */
179 TRUE, /* pc_relative */
180 0, /* bitpos */
181 complain_overflow_bitfield, /* complain_on_overflow */
182 bfd_elf_generic_reloc, /* special_function */
183 "R_VAX_PLT32", /* name */
184 FALSE, /* partial_inplace */
185 0, /* src_mask */
186 0xffffffff, /* dst_mask */
187 TRUE), /* pcrel_offset */
188
189 EMPTY_HOWTO (-1),
190 EMPTY_HOWTO (-1),
191 EMPTY_HOWTO (-1),
192 EMPTY_HOWTO (-1),
193 EMPTY_HOWTO (-1),
194
195 HOWTO (R_VAX_COPY, /* type */
196 0, /* rightshift */
197 0, /* size (0 = byte, 1 = short, 2 = long) */
198 0, /* bitsize */
199 FALSE, /* pc_relative */
200 0, /* bitpos */
201 complain_overflow_dont, /* complain_on_overflow */
202 bfd_elf_generic_reloc, /* special_function */
203 "R_VAX_COPY", /* name */
204 FALSE, /* partial_inplace */
205 0, /* src_mask */
206 0xffffffff, /* dst_mask */
207 FALSE), /* pcrel_offset */
208
209 HOWTO (R_VAX_GLOB_DAT, /* type */
210 0, /* rightshift */
211 2, /* size (0 = byte, 1 = short, 2 = long) */
212 32, /* bitsize */
213 FALSE, /* pc_relative */
214 0, /* bitpos */
215 complain_overflow_dont, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_VAX_GLOB_DAT", /* name */
218 FALSE, /* partial_inplace */
219 0, /* src_mask */
220 0xffffffff, /* dst_mask */
221 FALSE), /* pcrel_offset */
222
223 HOWTO (R_VAX_JMP_SLOT, /* type */
224 0, /* rightshift */
225 2, /* size (0 = byte, 1 = short, 2 = long) */
226 32, /* bitsize */
227 FALSE, /* pc_relative */
228 0, /* bitpos */
229 complain_overflow_dont, /* complain_on_overflow */
230 bfd_elf_generic_reloc, /* special_function */
231 "R_VAX_JMP_SLOT", /* name */
232 FALSE, /* partial_inplace */
233 0, /* src_mask */
234 0xffffffff, /* dst_mask */
235 FALSE), /* pcrel_offset */
236
237 HOWTO (R_VAX_RELATIVE, /* type */
238 0, /* rightshift */
239 2, /* size (0 = byte, 1 = short, 2 = long) */
240 32, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_dont, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_VAX_RELATIVE", /* name */
246 FALSE, /* partial_inplace */
247 0, /* src_mask */
248 0xffffffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* GNU extension to record C++ vtable hierarchy */
252 HOWTO (R_VAX_GNU_VTINHERIT, /* type */
253 0, /* rightshift */
254 2, /* size (0 = byte, 1 = short, 2 = long) */
255 0, /* bitsize */
256 FALSE, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_dont, /* complain_on_overflow */
259 NULL, /* special_function */
260 "R_VAX_GNU_VTINHERIT", /* name */
261 FALSE, /* partial_inplace */
262 0, /* src_mask */
263 0, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 /* GNU extension to record C++ vtable member usage */
267 HOWTO (R_VAX_GNU_VTENTRY, /* type */
268 0, /* rightshift */
269 2, /* size (0 = byte, 1 = short, 2 = long) */
270 0, /* bitsize */
271 FALSE, /* pc_relative */
272 0, /* bitpos */
273 complain_overflow_dont, /* complain_on_overflow */
274 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
275 "R_VAX_GNU_VTENTRY", /* name */
276 FALSE, /* partial_inplace */
277 0, /* src_mask */
278 0, /* dst_mask */
279 FALSE), /* pcrel_offset */
280 };
281
282 static void
283 rtype_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
284 {
285 unsigned int r_type;
286
287 r_type = ELF32_R_TYPE (dst->r_info);
288 if (r_type >= R_VAX_max)
289 {
290 (*_bfd_error_handler) (_("%B: unrecognised VAX reloc number: %d"),
291 abfd, r_type);
292 bfd_set_error (bfd_error_bad_value);
293 r_type = R_VAX_NONE;
294 }
295 cache_ptr->howto = &howto_table[r_type];
296 }
297
298 #define elf_info_to_howto rtype_to_howto
299
300 static const struct
301 {
302 bfd_reloc_code_real_type bfd_val;
303 int elf_val;
304 } reloc_map[] = {
305 { BFD_RELOC_NONE, R_VAX_NONE },
306 { BFD_RELOC_32, R_VAX_32 },
307 { BFD_RELOC_16, R_VAX_16 },
308 { BFD_RELOC_8, R_VAX_8 },
309 { BFD_RELOC_32_PCREL, R_VAX_PC32 },
310 { BFD_RELOC_16_PCREL, R_VAX_PC16 },
311 { BFD_RELOC_8_PCREL, R_VAX_PC8 },
312 { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
313 { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
314 { BFD_RELOC_NONE, R_VAX_COPY },
315 { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
316 { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
317 { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
318 { BFD_RELOC_CTOR, R_VAX_32 },
319 { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
320 { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
321 };
322
323 static reloc_howto_type *
324 reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
325 {
326 unsigned int i;
327 for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
328 {
329 if (reloc_map[i].bfd_val == code)
330 return &howto_table[reloc_map[i].elf_val];
331 }
332 return 0;
333 }
334
335 static reloc_howto_type *
336 reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
337 const char *r_name)
338 {
339 unsigned int i;
340
341 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
342 if (howto_table[i].name != NULL
343 && strcasecmp (howto_table[i].name, r_name) == 0)
344 return &howto_table[i];
345
346 return NULL;
347 }
348
349 #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
350 #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
351 #define ELF_ARCH bfd_arch_vax
352 /* end code generated by elf.el */
353 \f
354 /* Functions for the VAX ELF linker. */
355
356 /* The name of the dynamic interpreter. This is put in the .interp
357 section. */
358
359 #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
360
361 /* The size in bytes of an entry in the procedure linkage table. */
362
363 #define PLT_ENTRY_SIZE 12
364
365 /* The first entry in a procedure linkage table looks like this. See
366 the SVR4 ABI VAX supplement to see how this works. */
367
368 static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
369 {
370 0xdd, 0xef, /* pushl l^ */
371 0, 0, 0, 0, /* offset to .plt.got + 4 */
372 0x17, 0xff, /* jmp @L^(pc) */
373 0, 0, 0, 0, /* offset to .plt.got + 8 */
374 };
375
376 /* Subsequent entries in a procedure linkage table look like this. */
377
378 static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
379 {
380 0xfc, 0x0f, /* .word ^M<r11:r2> */
381 0x16, 0xef, /* jsb L^(pc) */
382 0, 0, 0, 0, /* replaced with offset to start of .plt */
383 0, 0, 0, 0, /* index into .rela.plt */
384 };
385
386 /* The VAX linker needs to keep track of the number of relocs that it
387 decides to copy in check_relocs for each symbol. This is so that it
388 can discard PC relative relocs if it doesn't need them when linking
389 with -Bsymbolic. We store the information in a field extending the
390 regular ELF linker hash table. */
391
392 /* This structure keeps track of the number of PC relative relocs we have
393 copied for a given symbol. */
394
395 struct elf_vax_pcrel_relocs_copied
396 {
397 /* Next section. */
398 struct elf_vax_pcrel_relocs_copied *next;
399 /* A section in dynobj. */
400 asection *section;
401 /* Number of relocs copied in this section. */
402 bfd_size_type count;
403 };
404
405 /* VAX ELF linker hash entry. */
406
407 struct elf_vax_link_hash_entry
408 {
409 struct elf_link_hash_entry root;
410
411 /* Number of PC relative relocs copied for this symbol. */
412 struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
413
414 bfd_vma got_addend;
415 };
416
417 /* Declare this now that the above structures are defined. */
418
419 static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
420 void *);
421
422 /* Declare this now that the above structures are defined. */
423
424 static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
425 void *);
426
427 /* Traverse an VAX ELF linker hash table. */
428
429 #define elf_vax_link_hash_traverse(table, func, info) \
430 (elf_link_hash_traverse \
431 ((table), \
432 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
433 (info)))
434
435 /* Create an entry in an VAX ELF linker hash table. */
436
437 static struct bfd_hash_entry *
438 elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
439 struct bfd_hash_table *table,
440 const char *string)
441 {
442 struct elf_vax_link_hash_entry *ret =
443 (struct elf_vax_link_hash_entry *) entry;
444
445 /* Allocate the structure if it has not already been allocated by a
446 subclass. */
447 if (ret == NULL)
448 ret = ((struct elf_vax_link_hash_entry *)
449 bfd_hash_allocate (table,
450 sizeof (struct elf_vax_link_hash_entry)));
451 if (ret == NULL)
452 return (struct bfd_hash_entry *) ret;
453
454 /* Call the allocation method of the superclass. */
455 ret = ((struct elf_vax_link_hash_entry *)
456 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
457 table, string));
458 if (ret != NULL)
459 {
460 ret->pcrel_relocs_copied = NULL;
461 }
462
463 return (struct bfd_hash_entry *) ret;
464 }
465
466 /* Create an VAX ELF linker hash table. */
467
468 static struct bfd_link_hash_table *
469 elf_vax_link_hash_table_create (bfd *abfd)
470 {
471 struct elf_link_hash_table *ret;
472 bfd_size_type amt = sizeof (struct elf_link_hash_table);
473
474 ret = bfd_zmalloc (amt);
475 if (ret == NULL)
476 return NULL;
477
478 if (!_bfd_elf_link_hash_table_init (ret, abfd,
479 elf_vax_link_hash_newfunc,
480 sizeof (struct elf_vax_link_hash_entry),
481 GENERIC_ELF_DATA))
482 {
483 free (ret);
484 return NULL;
485 }
486
487 return &ret->root;
488 }
489
490 /* Keep vax-specific flags in the ELF header */
491 static bfd_boolean
492 elf32_vax_set_private_flags (bfd *abfd, flagword flags)
493 {
494 elf_elfheader (abfd)->e_flags = flags;
495 elf_flags_init (abfd) = TRUE;
496 return TRUE;
497 }
498
499 /* Merge backend specific data from an object file to the output
500 object file when linking. */
501 static bfd_boolean
502 elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
503 {
504 flagword in_flags;
505
506 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
507 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
508 return TRUE;
509
510 in_flags = elf_elfheader (ibfd)->e_flags;
511
512 if (!elf_flags_init (obfd))
513 {
514 elf_flags_init (obfd) = TRUE;
515 elf_elfheader (obfd)->e_flags = in_flags;
516 }
517
518 return TRUE;
519 }
520
521 /* Display the flags field */
522 static bfd_boolean
523 elf32_vax_print_private_bfd_data (bfd *abfd, void * ptr)
524 {
525 FILE *file = (FILE *) ptr;
526
527 BFD_ASSERT (abfd != NULL && ptr != NULL);
528
529 /* Print normal ELF private data. */
530 _bfd_elf_print_private_bfd_data (abfd, ptr);
531
532 /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
533
534 /* xgettext:c-format */
535 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
536
537 if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
538 fprintf (file, _(" [nonpic]"));
539
540 if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
541 fprintf (file, _(" [d-float]"));
542
543 if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
544 fprintf (file, _(" [g-float]"));
545
546 fputc ('\n', file);
547
548 return TRUE;
549 }
550 /* Look through the relocs for a section during the first phase, and
551 allocate space in the global offset table or procedure linkage
552 table. */
553
554 static bfd_boolean
555 elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
556 const Elf_Internal_Rela *relocs)
557 {
558 bfd *dynobj;
559 Elf_Internal_Shdr *symtab_hdr;
560 struct elf_link_hash_entry **sym_hashes;
561 const Elf_Internal_Rela *rel;
562 const Elf_Internal_Rela *rel_end;
563 asection *sgot;
564 asection *srelgot;
565 asection *sreloc;
566
567 if (bfd_link_relocatable (info))
568 return TRUE;
569
570 dynobj = elf_hash_table (info)->dynobj;
571 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
572 sym_hashes = elf_sym_hashes (abfd);
573
574 sgot = NULL;
575 srelgot = NULL;
576 sreloc = NULL;
577
578 rel_end = relocs + sec->reloc_count;
579 for (rel = relocs; rel < rel_end; rel++)
580 {
581 unsigned long r_symndx;
582 struct elf_link_hash_entry *h;
583
584 r_symndx = ELF32_R_SYM (rel->r_info);
585
586 if (r_symndx < symtab_hdr->sh_info)
587 h = NULL;
588 else
589 {
590 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
591 while (h->root.type == bfd_link_hash_indirect
592 || h->root.type == bfd_link_hash_warning)
593 h = (struct elf_link_hash_entry *) h->root.u.i.link;
594
595 /* PR15323, ref flags aren't set for references in the same
596 object. */
597 h->root.non_ir_ref = 1;
598 }
599
600 switch (ELF32_R_TYPE (rel->r_info))
601 {
602 case R_VAX_GOT32:
603 BFD_ASSERT (h != NULL);
604
605 /* If this is a local symbol, we resolve it directly without
606 creating a global offset table entry. */
607 if (h->forced_local
608 || h == elf_hash_table (info)->hgot
609 || h == elf_hash_table (info)->hplt)
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_linker_section (dynobj, ".got");
625 BFD_ASSERT (sgot != NULL);
626 }
627
628 if (srelgot == NULL
629 && (h != NULL || bfd_link_pic (info)))
630 {
631 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
632 if (srelgot == NULL)
633 {
634 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
635 | SEC_IN_MEMORY | SEC_LINKER_CREATED
636 | SEC_READONLY);
637
638 srelgot = bfd_make_section_anyway_with_flags (dynobj,
639 ".rela.got",
640 flags);
641 if (srelgot == NULL
642 || !bfd_set_section_alignment (dynobj, srelgot, 2))
643 return FALSE;
644 }
645 }
646
647 if (h != NULL)
648 {
649 struct elf_vax_link_hash_entry *eh;
650
651 eh = (struct elf_vax_link_hash_entry *) h;
652 if (h->got.refcount == -1)
653 {
654 h->got.refcount = 1;
655 eh->got_addend = rel->r_addend;
656 }
657 else
658 {
659 h->got.refcount++;
660 if (eh->got_addend != (bfd_vma) rel->r_addend)
661 (*_bfd_error_handler)
662 (_("%s: warning: GOT addend of %ld to `%s' does"
663 " 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 BFD_ASSERT (h != NULL);
680
681 /* If this is a local symbol, we resolve it directly without
682 creating a procedure linkage table entry. */
683 if (h->forced_local)
684 break;
685
686 h->needs_plt = 1;
687 if (h->plt.refcount == -1)
688 h->plt.refcount = 1;
689 else
690 h->plt.refcount++;
691 break;
692
693 case R_VAX_PC8:
694 case R_VAX_PC16:
695 case R_VAX_PC32:
696 /* If we are creating a shared library and this is not a local
697 symbol, we need to copy the reloc into the shared library.
698 However when linking with -Bsymbolic and this is a global
699 symbol which is defined in an object we are including in the
700 link (i.e., DEF_REGULAR is set), then we can resolve the
701 reloc directly. At this point we have not seen all the input
702 files, so it is possible that DEF_REGULAR is not set now but
703 will be set later (it is never cleared). We account for that
704 possibility below by storing information in the
705 pcrel_relocs_copied field of the hash table entry. */
706 if (!(bfd_link_pic (info)
707 && (sec->flags & SEC_ALLOC) != 0
708 && h != NULL
709 && (!info->symbolic
710 || !h->def_regular)))
711 {
712 if (h != NULL
713 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
714 && !h->forced_local)
715 {
716 /* Make sure a plt entry is created for this symbol if
717 it turns out to be a function defined by a dynamic
718 object. */
719 if (h->plt.refcount == -1)
720 h->plt.refcount = 1;
721 else
722 h->plt.refcount++;
723 }
724 break;
725 }
726 /* If this is a local symbol, we can resolve it directly. */
727 if (h != NULL
728 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
729 || h->forced_local))
730 break;
731
732 /* Fall through. */
733 case R_VAX_8:
734 case R_VAX_16:
735 case R_VAX_32:
736 if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
737 {
738 /* Make sure a plt entry is created for this symbol if it
739 turns out to be a function defined by a dynamic object. */
740 if (h->plt.refcount == -1)
741 h->plt.refcount = 1;
742 else
743 h->plt.refcount++;
744 }
745
746 /* If we are creating a shared library, we need to copy the
747 reloc into the shared library. */
748 if (bfd_link_pic (info)
749 && (sec->flags & SEC_ALLOC) != 0)
750 {
751 /* When creating a shared object, we must copy these
752 reloc types into the output file. We create a reloc
753 section in dynobj and make room for this reloc. */
754 if (sreloc == NULL)
755 {
756 sreloc = _bfd_elf_make_dynamic_reloc_section
757 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
758
759 if (sreloc == NULL)
760 return FALSE;
761
762 if (sec->flags & SEC_READONLY)
763 info->flags |= DF_TEXTREL;
764 }
765
766 sreloc->size += sizeof (Elf32_External_Rela);
767
768 /* If we are linking with -Bsymbolic, we count the number of
769 PC relative relocations we have entered for this symbol,
770 so that we can discard them again if the symbol is later
771 defined by a regular object. Note that this function is
772 only called if we are using a vaxelf linker hash table,
773 which means that h is really a pointer to an
774 elf_vax_link_hash_entry. */
775 if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
776 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
777 || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
778 && info->symbolic)
779 {
780 struct elf_vax_link_hash_entry *eh;
781 struct elf_vax_pcrel_relocs_copied *p;
782
783 eh = (struct elf_vax_link_hash_entry *) h;
784
785 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
786 if (p->section == sreloc)
787 break;
788
789 if (p == NULL)
790 {
791 p = ((struct elf_vax_pcrel_relocs_copied *)
792 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
793 if (p == NULL)
794 return FALSE;
795 p->next = eh->pcrel_relocs_copied;
796 eh->pcrel_relocs_copied = p;
797 p->section = sreloc;
798 p->count = 0;
799 }
800
801 ++p->count;
802 }
803 }
804
805 break;
806
807 /* This relocation describes the C++ object vtable hierarchy.
808 Reconstruct it for later use during GC. */
809 case R_VAX_GNU_VTINHERIT:
810 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
811 return FALSE;
812 break;
813
814 /* This relocation describes which C++ vtable entries are actually
815 used. Record for later use during GC. */
816 case R_VAX_GNU_VTENTRY:
817 BFD_ASSERT (h != NULL);
818 if (h != NULL
819 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
820 return FALSE;
821 break;
822
823 default:
824 break;
825 }
826 }
827
828 return TRUE;
829 }
830
831 /* Return the section that should be marked against GC for a given
832 relocation. */
833
834 static asection *
835 elf_vax_gc_mark_hook (asection *sec,
836 struct bfd_link_info *info,
837 Elf_Internal_Rela *rel,
838 struct elf_link_hash_entry *h,
839 Elf_Internal_Sym *sym)
840 {
841 if (h != NULL)
842 switch (ELF32_R_TYPE (rel->r_info))
843 {
844 case R_VAX_GNU_VTINHERIT:
845 case R_VAX_GNU_VTENTRY:
846 return NULL;
847 }
848
849 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
850 }
851
852 /* Update the got entry reference counts for the section being removed. */
853
854 static bfd_boolean
855 elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
856 const Elf_Internal_Rela *relocs)
857 {
858 Elf_Internal_Shdr *symtab_hdr;
859 struct elf_link_hash_entry **sym_hashes;
860 const Elf_Internal_Rela *rel, *relend;
861 bfd *dynobj;
862
863 if (bfd_link_relocatable (info))
864 return TRUE;
865
866 dynobj = elf_hash_table (info)->dynobj;
867 if (dynobj == NULL)
868 return TRUE;
869
870 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
871 sym_hashes = elf_sym_hashes (abfd);
872
873 relend = relocs + sec->reloc_count;
874 for (rel = relocs; rel < relend; rel++)
875 {
876 unsigned long r_symndx;
877 struct elf_link_hash_entry *h = NULL;
878
879 r_symndx = ELF32_R_SYM (rel->r_info);
880 if (r_symndx >= symtab_hdr->sh_info)
881 {
882 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
883 while (h->root.type == bfd_link_hash_indirect
884 || h->root.type == bfd_link_hash_warning)
885 h = (struct elf_link_hash_entry *) h->root.u.i.link;
886 }
887
888 switch (ELF32_R_TYPE (rel->r_info))
889 {
890 case R_VAX_GOT32:
891 if (h != NULL && h->got.refcount > 0)
892 --h->got.refcount;
893 break;
894
895 case R_VAX_PLT32:
896 case R_VAX_PC8:
897 case R_VAX_PC16:
898 case R_VAX_PC32:
899 case R_VAX_8:
900 case R_VAX_16:
901 case R_VAX_32:
902 if (h != NULL && h->plt.refcount > 0)
903 --h->plt.refcount;
904 break;
905
906 default:
907 break;
908 }
909 }
910
911 return TRUE;
912 }
913
914 /* Adjust a symbol defined by a dynamic object and referenced by a
915 regular object. The current definition is in some section of the
916 dynamic object, but we're not including those sections. We have to
917 change the definition to something the rest of the link can
918 understand. */
919
920 static bfd_boolean
921 elf_vax_adjust_dynamic_symbol (struct bfd_link_info *info,
922 struct elf_link_hash_entry *h)
923 {
924 bfd *dynobj;
925 asection *s;
926
927 dynobj = elf_hash_table (info)->dynobj;
928
929 /* Make sure we know what is going on here. */
930 BFD_ASSERT (dynobj != NULL
931 && (h->needs_plt
932 || h->u.weakdef != NULL
933 || (h->def_dynamic
934 && h->ref_regular
935 && !h->def_regular)));
936
937 /* If this is a function, put it in the procedure linkage table. We
938 will fill in the contents of the procedure linkage table later,
939 when we know the address of the .got section. */
940 if (h->type == STT_FUNC
941 || h->needs_plt)
942 {
943 if (h->plt.refcount <= 0
944 || SYMBOL_CALLS_LOCAL (info, h)
945 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
946 && h->root.type == bfd_link_hash_undefweak))
947 {
948 /* This case can occur if we saw a PLTxx reloc in an input
949 file, but the symbol was never referred to by a dynamic
950 object, or if all references were garbage collected. In
951 such a case, we don't actually need to build a procedure
952 linkage table, and we can just do a PCxx reloc instead. */
953 h->plt.offset = (bfd_vma) -1;
954 h->needs_plt = 0;
955 return TRUE;
956 }
957
958 s = bfd_get_linker_section (dynobj, ".plt");
959 BFD_ASSERT (s != NULL);
960
961 /* If this is the first .plt entry, make room for the special
962 first entry. */
963 if (s->size == 0)
964 {
965 s->size += PLT_ENTRY_SIZE;
966 }
967
968 /* If this symbol is not defined in a regular file, and we are
969 not generating a shared library, then set the symbol to this
970 location in the .plt. This is required to make function
971 pointers compare as equal between the normal executable and
972 the shared library. */
973 if (!bfd_link_pic (info)
974 && !h->def_regular)
975 {
976 h->root.u.def.section = s;
977 h->root.u.def.value = s->size;
978 }
979
980 h->plt.offset = s->size;
981
982 /* Make room for this entry. */
983 s->size += PLT_ENTRY_SIZE;
984
985 /* We also need to make an entry in the .got.plt section, which
986 will be placed in the .got section by the linker script. */
987
988 s = bfd_get_linker_section (dynobj, ".got.plt");
989 BFD_ASSERT (s != NULL);
990 s->size += 4;
991
992 /* We also need to make an entry in the .rela.plt section. */
993
994 s = bfd_get_linker_section (dynobj, ".rela.plt");
995 BFD_ASSERT (s != NULL);
996 s->size += sizeof (Elf32_External_Rela);
997
998 return TRUE;
999 }
1000
1001 /* Reinitialize the plt offset now that it is not used as a reference
1002 count any more. */
1003 h->plt.offset = (bfd_vma) -1;
1004
1005 /* If this is a weak symbol, and there is a real definition, the
1006 processor independent code will have arranged for us to see the
1007 real definition first, and we can just use the same value. */
1008 if (h->u.weakdef != NULL)
1009 {
1010 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1011 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1012 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1013 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1014 return TRUE;
1015 }
1016
1017 /* This is a reference to a symbol defined by a dynamic object which
1018 is not a function. */
1019
1020 /* If we are creating a shared library, we must presume that the
1021 only references to the symbol are via the global offset table.
1022 For such cases we need not do anything here; the relocations will
1023 be handled correctly by relocate_section. */
1024 if (bfd_link_pic (info))
1025 return TRUE;
1026
1027 /* We must allocate the symbol in our .dynbss section, which will
1028 become part of the .bss section of the executable. There will be
1029 an entry for this symbol in the .dynsym section. The dynamic
1030 object will contain position independent code, so all references
1031 from the dynamic object to this symbol will go through the global
1032 offset table. The dynamic linker will use the .dynsym entry to
1033 determine the address it must put in the global offset table, so
1034 both the dynamic object and the regular object will refer to the
1035 same memory location for the variable. */
1036
1037 s = bfd_get_linker_section (dynobj, ".dynbss");
1038 BFD_ASSERT (s != NULL);
1039
1040 /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
1041 copy the initial value out of the dynamic object and into the
1042 runtime process image. We need to remember the offset into the
1043 .rela.bss section we are going to use. */
1044 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1045 {
1046 asection *srel;
1047
1048 srel = bfd_get_linker_section (dynobj, ".rela.bss");
1049 BFD_ASSERT (srel != NULL);
1050 srel->size += sizeof (Elf32_External_Rela);
1051 h->needs_copy = 1;
1052 }
1053
1054 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1055 }
1056
1057 /* This function is called via elf_link_hash_traverse. It resets GOT
1058 and PLT (.GOT) reference counts back to -1 so normal PC32 relocation
1059 will be done. */
1060
1061 static bfd_boolean
1062 elf_vax_discard_got_entries (struct elf_link_hash_entry *h,
1063 void *infoptr ATTRIBUTE_UNUSED)
1064 {
1065 h->got.refcount = -1;
1066 h->plt.refcount = -1;
1067
1068 return TRUE;
1069 }
1070
1071 /* Discard unused dynamic data if this is a static link. */
1072
1073 static bfd_boolean
1074 elf_vax_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1075 struct bfd_link_info *info)
1076 {
1077 bfd *dynobj;
1078 asection *s;
1079
1080 dynobj = elf_hash_table (info)->dynobj;
1081
1082 if (dynobj && !elf_hash_table (info)->dynamic_sections_created)
1083 {
1084 /* We may have created entries in the .rela.got and .got sections.
1085 However, if we are not creating the dynamic sections, we will
1086 not actually use these entries. Reset the size of .rela.got
1087 and .got, which will cause them to get stripped from the output
1088 file below. */
1089 s = bfd_get_linker_section (dynobj, ".rela.got");
1090 if (s != NULL)
1091 s->size = 0;
1092 s = bfd_get_linker_section (dynobj, ".got.plt");
1093 if (s != NULL)
1094 s->size = 0;
1095 s = bfd_get_linker_section (dynobj, ".got");
1096 if (s != NULL)
1097 s->size = 0;
1098 }
1099
1100 /* If this is a static link, we need to discard all the got entries we've
1101 recorded. */
1102 if (!dynobj || !elf_hash_table (info)->dynamic_sections_created)
1103 elf_link_hash_traverse (elf_hash_table (info),
1104 elf_vax_discard_got_entries,
1105 info);
1106
1107 return TRUE;
1108 }
1109
1110 /* Set the sizes of the dynamic sections. */
1111
1112 static bfd_boolean
1113 elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1114 {
1115 bfd *dynobj;
1116 asection *s;
1117 bfd_boolean plt;
1118 bfd_boolean relocs;
1119 bfd_boolean reltext;
1120
1121 dynobj = elf_hash_table (info)->dynobj;
1122 BFD_ASSERT (dynobj != NULL);
1123
1124 if (elf_hash_table (info)->dynamic_sections_created)
1125 {
1126 /* Set the contents of the .interp section to the interpreter. */
1127 if (bfd_link_executable (info) && !info->nointerp)
1128 {
1129 s = bfd_get_linker_section (dynobj, ".interp");
1130 BFD_ASSERT (s != NULL);
1131 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1132 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1133 }
1134 }
1135
1136 /* If this is a -Bsymbolic shared link, then we need to discard all PC
1137 relative relocs against symbols defined in a regular object. We
1138 allocated space for them in the check_relocs routine, but we will not
1139 fill them in in the relocate_section routine. */
1140 if (bfd_link_pic (info) && info->symbolic)
1141 elf_vax_link_hash_traverse (elf_hash_table (info),
1142 elf_vax_discard_copies,
1143 NULL);
1144
1145 /* If this is a -Bsymbolic shared link, we need to discard all the got
1146 entries we've recorded. Otherwise, we need to instantiate (allocate
1147 space for them). */
1148 elf_link_hash_traverse (elf_hash_table (info),
1149 elf_vax_instantiate_got_entries,
1150 info);
1151
1152 /* The check_relocs and adjust_dynamic_symbol entry points have
1153 determined the sizes of the various dynamic sections. Allocate
1154 memory for them. */
1155 plt = FALSE;
1156 relocs = FALSE;
1157 reltext = FALSE;
1158 for (s = dynobj->sections; s != NULL; s = s->next)
1159 {
1160 const char *name;
1161
1162 if ((s->flags & SEC_LINKER_CREATED) == 0)
1163 continue;
1164
1165 /* It's OK to base decisions on the section name, because none
1166 of the dynobj section names depend upon the input files. */
1167 name = bfd_get_section_name (dynobj, s);
1168
1169 if (strcmp (name, ".plt") == 0)
1170 {
1171 /* Remember whether there is a PLT. */
1172 plt = s->size != 0;
1173 }
1174 else if (CONST_STRNEQ (name, ".rela"))
1175 {
1176 if (s->size != 0)
1177 {
1178 asection *target;
1179
1180 /* Remember whether there are any reloc sections other
1181 than .rela.plt. */
1182 if (strcmp (name, ".rela.plt") != 0)
1183 {
1184 const char *outname;
1185
1186 relocs = TRUE;
1187
1188 /* If this relocation section applies to a read only
1189 section, then we probably need a DT_TEXTREL
1190 entry. .rela.plt is actually associated with
1191 .got.plt, which is never readonly. */
1192 outname = bfd_get_section_name (output_bfd,
1193 s->output_section);
1194 target = bfd_get_section_by_name (output_bfd, outname + 5);
1195 if (target != NULL
1196 && (target->flags & SEC_READONLY) != 0
1197 && (target->flags & SEC_ALLOC) != 0)
1198 reltext = TRUE;
1199 }
1200
1201 /* We use the reloc_count field as a counter if we need
1202 to copy relocs into the output file. */
1203 s->reloc_count = 0;
1204 }
1205 }
1206 else if (! CONST_STRNEQ (name, ".got")
1207 && strcmp (name, ".dynbss") != 0)
1208 {
1209 /* It's not one of our sections, so don't allocate space. */
1210 continue;
1211 }
1212
1213 if (s->size == 0)
1214 {
1215 /* If we don't need this section, strip it from the
1216 output file. This is mostly to handle .rela.bss and
1217 .rela.plt. We must create both sections in
1218 create_dynamic_sections, because they must be created
1219 before the linker maps input sections to output
1220 sections. The linker does that before
1221 adjust_dynamic_symbol is called, and it is that
1222 function which decides whether anything needs to go
1223 into these sections. */
1224 s->flags |= SEC_EXCLUDE;
1225 continue;
1226 }
1227
1228 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1229 continue;
1230
1231 /* Allocate memory for the section contents. */
1232 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1233 if (s->contents == NULL)
1234 return FALSE;
1235 }
1236
1237 if (elf_hash_table (info)->dynamic_sections_created)
1238 {
1239 /* Add some entries to the .dynamic section. We fill in the
1240 values later, in elf_vax_finish_dynamic_sections, but we
1241 must add the entries now so that we get the correct size for
1242 the .dynamic section. The DT_DEBUG entry is filled in by the
1243 dynamic linker and used by the debugger. */
1244 #define add_dynamic_entry(TAG, VAL) \
1245 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1246
1247 if (!bfd_link_pic (info))
1248 {
1249 if (!add_dynamic_entry (DT_DEBUG, 0))
1250 return FALSE;
1251 }
1252
1253 if (plt)
1254 {
1255 if (!add_dynamic_entry (DT_PLTGOT, 0)
1256 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1257 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1258 || !add_dynamic_entry (DT_JMPREL, 0))
1259 return FALSE;
1260 }
1261
1262 if (relocs)
1263 {
1264 if (!add_dynamic_entry (DT_RELA, 0)
1265 || !add_dynamic_entry (DT_RELASZ, 0)
1266 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
1267 return FALSE;
1268 }
1269
1270 if (reltext || (info->flags & DF_TEXTREL) != 0)
1271 {
1272 if (!add_dynamic_entry (DT_TEXTREL, 0))
1273 return FALSE;
1274 }
1275 }
1276 #undef add_dynamic_entry
1277
1278 return TRUE;
1279 }
1280
1281 /* This function is called via elf_vax_link_hash_traverse if we are
1282 creating a shared object with -Bsymbolic. It discards the space
1283 allocated to copy PC relative relocs against symbols which are defined
1284 in regular objects. We allocated space for them in the check_relocs
1285 routine, but we won't fill them in in the relocate_section routine. */
1286
1287 static bfd_boolean
1288 elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
1289 void * ignore ATTRIBUTE_UNUSED)
1290 {
1291 struct elf_vax_pcrel_relocs_copied *s;
1292
1293 /* We only discard relocs for symbols defined in a regular object. */
1294 if (!h->root.def_regular)
1295 return TRUE;
1296
1297 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
1298 s->section->size -= s->count * sizeof (Elf32_External_Rela);
1299
1300 return TRUE;
1301 }
1302
1303 /* This function is called via elf_link_hash_traverse. It looks for
1304 entries that have GOT or PLT (.GOT) references. If creating a shared
1305 object with -Bsymbolic, or the symbol has been forced local, then it
1306 resets the reference count back to -1 so normal PC32 relocation will
1307 be done. Otherwise space in the .got and .rela.got will be reserved
1308 for the symbol. */
1309
1310 static bfd_boolean
1311 elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr)
1312 {
1313 struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
1314 bfd *dynobj;
1315 asection *sgot;
1316 asection *srelgot;
1317
1318 /* We don't care about non-GOT (and non-PLT) entries. */
1319 if (h->got.refcount <= 0 && h->plt.refcount <= 0)
1320 return TRUE;
1321
1322 dynobj = elf_hash_table (info)->dynobj;
1323 BFD_ASSERT (dynobj != NULL);
1324
1325 sgot = bfd_get_linker_section (dynobj, ".got");
1326 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1327
1328 if (SYMBOL_REFERENCES_LOCAL (info, h))
1329 {
1330 h->got.refcount = -1;
1331 h->plt.refcount = -1;
1332 }
1333 else if (h->got.refcount > 0)
1334 {
1335 /* Make sure this symbol is output as a dynamic symbol. */
1336 if (h->dynindx == -1)
1337 {
1338 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1339 return FALSE;
1340 }
1341
1342 /* Allocate space in the .got and .rela.got sections. */
1343 sgot->size += 4;
1344 srelgot->size += sizeof (Elf32_External_Rela);
1345 }
1346
1347 return TRUE;
1348 }
1349
1350 /* Relocate an VAX ELF section. */
1351
1352 static bfd_boolean
1353 elf_vax_relocate_section (bfd *output_bfd,
1354 struct bfd_link_info *info,
1355 bfd *input_bfd,
1356 asection *input_section,
1357 bfd_byte *contents,
1358 Elf_Internal_Rela *relocs,
1359 Elf_Internal_Sym *local_syms,
1360 asection **local_sections)
1361 {
1362 bfd *dynobj;
1363 Elf_Internal_Shdr *symtab_hdr;
1364 struct elf_link_hash_entry **sym_hashes;
1365 bfd_vma plt_index;
1366 bfd_vma got_offset;
1367 asection *sgot;
1368 asection *splt;
1369 asection *sgotplt;
1370 asection *sreloc;
1371 Elf_Internal_Rela *rel;
1372 Elf_Internal_Rela *relend;
1373
1374 dynobj = elf_hash_table (info)->dynobj;
1375 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1376 sym_hashes = elf_sym_hashes (input_bfd);
1377
1378 sgot = NULL;
1379 splt = NULL;
1380 sgotplt = NULL;
1381 sreloc = NULL;
1382
1383 rel = relocs;
1384 relend = relocs + input_section->reloc_count;
1385 for (; rel < relend; rel++)
1386 {
1387 int r_type;
1388 reloc_howto_type *howto;
1389 unsigned long r_symndx;
1390 struct elf_link_hash_entry *h;
1391 Elf_Internal_Sym *sym;
1392 asection *sec;
1393 bfd_vma relocation;
1394 bfd_reloc_status_type r;
1395
1396 r_type = ELF32_R_TYPE (rel->r_info);
1397 if (r_type < 0 || r_type >= (int) R_VAX_max)
1398 {
1399 bfd_set_error (bfd_error_bad_value);
1400 return FALSE;
1401 }
1402 howto = howto_table + r_type;
1403
1404 r_symndx = ELF32_R_SYM (rel->r_info);
1405 h = NULL;
1406 sym = NULL;
1407 sec = NULL;
1408 if (r_symndx < symtab_hdr->sh_info)
1409 {
1410 sym = local_syms + r_symndx;
1411 sec = local_sections[r_symndx];
1412 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1413 }
1414 else
1415 {
1416 bfd_boolean unresolved_reloc;
1417 bfd_boolean warned, ignored;
1418
1419 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1420 r_symndx, symtab_hdr, sym_hashes,
1421 h, sec, relocation,
1422 unresolved_reloc, warned, ignored);
1423
1424 if ((h->root.type == bfd_link_hash_defined
1425 || h->root.type == bfd_link_hash_defweak)
1426 && ((r_type == R_VAX_PLT32
1427 && h->plt.offset != (bfd_vma) -1
1428 && !h->forced_local
1429 && elf_hash_table (info)->dynamic_sections_created)
1430 || (r_type == R_VAX_GOT32
1431 && h->got.offset != (bfd_vma) -1
1432 && !h->forced_local
1433 && elf_hash_table (info)->dynamic_sections_created
1434 && (! bfd_link_pic (info)
1435 || (! info->symbolic && h->dynindx != -1)
1436 || !h->def_regular))
1437 || (bfd_link_pic (info)
1438 && ((! info->symbolic && h->dynindx != -1)
1439 || !h->def_regular)
1440 && ((input_section->flags & SEC_ALLOC) != 0
1441 /* DWARF will emit R_VAX_32 relocations in its
1442 sections against symbols defined externally
1443 in shared libraries. We can't do anything
1444 with them here. */
1445
1446 || ((input_section->flags & SEC_DEBUGGING) != 0
1447 && h->def_dynamic))
1448 && (r_type == R_VAX_8
1449 || r_type == R_VAX_16
1450 || r_type == R_VAX_32))))
1451 /* In these cases, we don't need the relocation
1452 value. We check specially because in some
1453 obscure cases sec->output_section will be NULL. */
1454 relocation = 0;
1455 }
1456
1457 if (sec != NULL && discarded_section (sec))
1458 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1459 rel, 1, relend, howto, 0, contents);
1460
1461 if (bfd_link_relocatable (info))
1462 continue;
1463
1464 switch (r_type)
1465 {
1466 case R_VAX_GOT32:
1467 /* Relocation is to the address of the entry for this symbol
1468 in the global offset table. */
1469
1470 /* Resolve a GOTxx reloc against a local symbol directly,
1471 without using the global offset table. */
1472 if (h == NULL
1473 || h->got.offset == (bfd_vma) -1)
1474 break;
1475
1476 {
1477 bfd_vma off;
1478
1479 if (sgot == NULL)
1480 {
1481 sgot = bfd_get_linker_section (dynobj, ".got");
1482 BFD_ASSERT (sgot != NULL);
1483 }
1484
1485 off = h->got.offset;
1486 BFD_ASSERT (off < sgot->size);
1487
1488 bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
1489
1490 relocation = sgot->output_offset + off;
1491 /* The GOT relocation uses the addend. */
1492 rel->r_addend = 0;
1493
1494 /* Change the reference to be indirect. */
1495 contents[rel->r_offset - 1] |= 0x10;
1496 relocation += sgot->output_section->vma;
1497 }
1498 break;
1499
1500 case R_VAX_PC32:
1501 /* If we are creating an executable and the function this
1502 reloc refers to is in a shared lib, then we made a PLT
1503 entry for this symbol and need to handle the reloc like
1504 a PLT reloc. */
1505 if (bfd_link_pic (info))
1506 goto r_vax_pc32_shared;
1507 /* Fall through. */
1508 case R_VAX_PLT32:
1509 /* Relocation is to the entry for this symbol in the
1510 procedure linkage table. */
1511
1512 /* Resolve a PLTxx reloc against a local symbol directly,
1513 without using the procedure linkage table. */
1514 if (h == NULL
1515 || h->plt.offset == (bfd_vma) -1)
1516 break;
1517
1518 if (splt == NULL)
1519 {
1520 splt = bfd_get_linker_section (dynobj, ".plt");
1521 BFD_ASSERT (splt != NULL);
1522 }
1523
1524 if (sgotplt == NULL)
1525 {
1526 sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1527 BFD_ASSERT (sgotplt != NULL);
1528 }
1529
1530 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1531
1532 /* Get the offset into the .got table of the entry that
1533 corresponds to this function. Each .got entry is 4 bytes.
1534 The first two are reserved. */
1535 got_offset = (plt_index + 3) * 4;
1536
1537 /* We want the relocation to point into the .got.plt instead
1538 of the plt itself. */
1539 relocation = (sgotplt->output_section->vma
1540 + sgotplt->output_offset
1541 + got_offset);
1542 contents[rel->r_offset-1] |= 0x10; /* make indirect */
1543 if (rel->r_addend == 2)
1544 {
1545 h->plt.offset |= 1;
1546 }
1547 else if (rel->r_addend != 0)
1548 (*_bfd_error_handler)
1549 (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
1550 bfd_get_filename (input_bfd), rel->r_addend,
1551 h->root.root.string,
1552 bfd_get_section_name (input_bfd, input_section));
1553 rel->r_addend = 0;
1554
1555 break;
1556
1557 case R_VAX_PC8:
1558 case R_VAX_PC16:
1559 r_vax_pc32_shared:
1560 if (h == NULL
1561 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1562 || h->forced_local)
1563 break;
1564 /* Fall through. */
1565 case R_VAX_8:
1566 case R_VAX_16:
1567 case R_VAX_32:
1568 if (bfd_link_pic (info)
1569 && r_symndx != STN_UNDEF
1570 && (input_section->flags & SEC_ALLOC) != 0
1571 && ((r_type != R_VAX_PC8
1572 && r_type != R_VAX_PC16
1573 && r_type != R_VAX_PC32)
1574 || ((input_section->flags & SEC_CODE)
1575 && (!info->symbolic
1576 || (!h->def_regular && h->type != STT_SECTION)))))
1577 {
1578 Elf_Internal_Rela outrel;
1579 bfd_byte *loc;
1580 bfd_boolean skip, relocate;
1581
1582 /* When generating a shared object, these relocations
1583 are copied into the output file to be resolved at run
1584 time. */
1585 if (sreloc == NULL)
1586 {
1587 sreloc = _bfd_elf_get_dynamic_reloc_section
1588 (input_bfd, input_section, /*rela?*/ TRUE);
1589 if (sreloc == NULL)
1590 return FALSE;
1591 }
1592
1593 skip = FALSE;
1594 relocate = FALSE;
1595
1596 outrel.r_offset =
1597 _bfd_elf_section_offset (output_bfd, info, input_section,
1598 rel->r_offset);
1599 if (outrel.r_offset == (bfd_vma) -1)
1600 skip = TRUE;
1601 if (outrel.r_offset == (bfd_vma) -2)
1602 skip = TRUE, relocate = TRUE;
1603 outrel.r_offset += (input_section->output_section->vma
1604 + input_section->output_offset);
1605
1606 if (skip)
1607 memset (&outrel, 0, sizeof outrel);
1608 /* h->dynindx may be -1 if the symbol was marked to
1609 become local. */
1610 else if (h != NULL
1611 && ((! info->symbolic && h->dynindx != -1)
1612 || !h->def_regular))
1613 {
1614 BFD_ASSERT (h->dynindx != -1);
1615 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1616 outrel.r_addend = relocation + rel->r_addend;
1617 }
1618 else
1619 {
1620 if (r_type == R_VAX_32)
1621 {
1622 relocate = TRUE;
1623 outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
1624 BFD_ASSERT (bfd_get_signed_32 (input_bfd,
1625 &contents[rel->r_offset]) == 0);
1626 outrel.r_addend = relocation + rel->r_addend;
1627 }
1628 else
1629 {
1630 long indx;
1631
1632 if (bfd_is_abs_section (sec))
1633 indx = 0;
1634 else if (sec == NULL || sec->owner == NULL)
1635 {
1636 bfd_set_error (bfd_error_bad_value);
1637 return FALSE;
1638 }
1639 else
1640 {
1641 asection *osec;
1642
1643 /* We are turning this relocation into one
1644 against a section symbol. It would be
1645 proper to subtract the symbol's value,
1646 osec->vma, from the emitted reloc addend,
1647 but ld.so expects buggy relocs. */
1648 osec = sec->output_section;
1649 indx = elf_section_data (osec)->dynindx;
1650 if (indx == 0)
1651 {
1652 struct elf_link_hash_table *htab;
1653 htab = elf_hash_table (info);
1654 osec = htab->text_index_section;
1655 indx = elf_section_data (osec)->dynindx;
1656 }
1657 BFD_ASSERT (indx != 0);
1658 }
1659
1660 outrel.r_info = ELF32_R_INFO (indx, r_type);
1661 outrel.r_addend = relocation + rel->r_addend;
1662 }
1663 }
1664
1665 if ((input_section->flags & SEC_CODE) != 0
1666 || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32
1667 && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE
1668 && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY
1669 && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT
1670 && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT))
1671 {
1672 if (h != NULL)
1673 (*_bfd_error_handler)
1674 (_("%s: warning: %s relocation against symbol `%s' from %s section"),
1675 bfd_get_filename (input_bfd), howto->name,
1676 h->root.root.string,
1677 bfd_get_section_name (input_bfd, input_section));
1678 else
1679 (*_bfd_error_handler)
1680 (_("%s: warning: %s relocation to 0x%x from %s section"),
1681 bfd_get_filename (input_bfd), howto->name,
1682 outrel.r_addend,
1683 bfd_get_section_name (input_bfd, input_section));
1684 }
1685 loc = sreloc->contents;
1686 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1687 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1688
1689 /* This reloc will be computed at runtime, so there's no
1690 need to do anything now, except for R_VAX_32
1691 relocations that have been turned into
1692 R_VAX_RELATIVE. */
1693 if (!relocate)
1694 continue;
1695 }
1696
1697 break;
1698
1699 case R_VAX_GNU_VTINHERIT:
1700 case R_VAX_GNU_VTENTRY:
1701 /* These are no-ops in the end. */
1702 continue;
1703
1704 default:
1705 break;
1706 }
1707
1708 /* VAX PCREL relocations are from the end of relocation, not the start.
1709 So subtract the difference from the relocation amount since we can't
1710 add it to the offset. */
1711 if (howto->pc_relative && howto->pcrel_offset)
1712 relocation -= bfd_get_reloc_size(howto);
1713
1714 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1715 contents, rel->r_offset,
1716 relocation, rel->r_addend);
1717
1718 if (r != bfd_reloc_ok)
1719 {
1720 switch (r)
1721 {
1722 default:
1723 case bfd_reloc_outofrange:
1724 abort ();
1725 case bfd_reloc_overflow:
1726 {
1727 const char *name;
1728
1729 if (h != NULL)
1730 name = NULL;
1731 else
1732 {
1733 name = bfd_elf_string_from_elf_section (input_bfd,
1734 symtab_hdr->sh_link,
1735 sym->st_name);
1736 if (name == NULL)
1737 return FALSE;
1738 if (*name == '\0')
1739 name = bfd_section_name (input_bfd, sec);
1740 }
1741 if (!(info->callbacks->reloc_overflow
1742 (info, (h ? &h->root : NULL), name, howto->name,
1743 (bfd_vma) 0, input_bfd, input_section,
1744 rel->r_offset)))
1745 return FALSE;
1746 }
1747 break;
1748 }
1749 }
1750 }
1751
1752 return TRUE;
1753 }
1754
1755 /* Finish up dynamic symbol handling. We set the contents of various
1756 dynamic sections here. */
1757
1758 static bfd_boolean
1759 elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
1760 struct elf_link_hash_entry *h,
1761 Elf_Internal_Sym *sym)
1762 {
1763 bfd *dynobj;
1764
1765 dynobj = elf_hash_table (info)->dynobj;
1766
1767 if (h->plt.offset != (bfd_vma) -1)
1768 {
1769 asection *splt;
1770 asection *sgot;
1771 asection *srela;
1772 bfd_vma plt_index;
1773 bfd_vma got_offset;
1774 bfd_vma addend;
1775 Elf_Internal_Rela rela;
1776 bfd_byte *loc;
1777
1778 /* This symbol has an entry in the procedure linkage table. Set
1779 it up. */
1780 BFD_ASSERT (h->dynindx != -1);
1781
1782 splt = bfd_get_linker_section (dynobj, ".plt");
1783 sgot = bfd_get_linker_section (dynobj, ".got.plt");
1784 srela = bfd_get_linker_section (dynobj, ".rela.plt");
1785 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
1786
1787 addend = 2 * (h->plt.offset & 1);
1788 h->plt.offset &= ~1;
1789
1790 /* Get the index in the procedure linkage table which
1791 corresponds to this symbol. This is the index of this symbol
1792 in all the symbols for which we are making plt entries. The
1793 first entry in the procedure linkage table is reserved. */
1794 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1795
1796 /* Get the offset into the .got table of the entry that
1797 corresponds to this function. Each .got entry is 4 bytes.
1798 The first two are reserved. */
1799 got_offset = (plt_index + 3) * 4;
1800
1801 /* Fill in the entry in the procedure linkage table. */
1802 memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
1803 PLT_ENTRY_SIZE);
1804
1805 /* The offset is relative to the first extension word. */
1806 bfd_put_32 (output_bfd,
1807 -(h->plt.offset + 8),
1808 splt->contents + h->plt.offset + 4);
1809
1810 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
1811 splt->contents + h->plt.offset + 8);
1812
1813 /* Fill in the entry in the global offset table. */
1814 bfd_put_32 (output_bfd,
1815 (splt->output_section->vma
1816 + splt->output_offset
1817 + h->plt.offset) + addend,
1818 sgot->contents + got_offset);
1819
1820 /* Fill in the entry in the .rela.plt section. */
1821 rela.r_offset = (sgot->output_section->vma
1822 + sgot->output_offset
1823 + got_offset);
1824 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
1825 rela.r_addend = addend;
1826 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
1827 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1828
1829 if (!h->def_regular)
1830 {
1831 /* Mark the symbol as undefined, rather than as defined in
1832 the .plt section. Leave the value alone. */
1833 sym->st_shndx = SHN_UNDEF;
1834 }
1835 }
1836
1837 if (h->got.offset != (bfd_vma) -1)
1838 {
1839 asection *sgot;
1840 asection *srela;
1841 Elf_Internal_Rela rela;
1842 bfd_byte *loc;
1843
1844 /* This symbol has an entry in the global offset table. Set it
1845 up. */
1846 sgot = bfd_get_linker_section (dynobj, ".got");
1847 srela = bfd_get_linker_section (dynobj, ".rela.got");
1848 BFD_ASSERT (sgot != NULL && srela != NULL);
1849
1850 rela.r_offset = (sgot->output_section->vma
1851 + sgot->output_offset
1852 + h->got.offset);
1853 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
1854 rela.r_addend = bfd_get_signed_32 (output_bfd,
1855 sgot->contents + h->got.offset);
1856
1857 loc = srela->contents;
1858 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1859 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1860 }
1861
1862 if (h->needs_copy)
1863 {
1864 asection *s;
1865 Elf_Internal_Rela rela;
1866 bfd_byte *loc;
1867
1868 /* This symbol needs a copy reloc. Set it up. */
1869 BFD_ASSERT (h->dynindx != -1
1870 && (h->root.type == bfd_link_hash_defined
1871 || h->root.type == bfd_link_hash_defweak));
1872
1873 s = bfd_get_linker_section (dynobj, ".rela.bss");
1874 BFD_ASSERT (s != NULL);
1875
1876 rela.r_offset = (h->root.u.def.value
1877 + h->root.u.def.section->output_section->vma
1878 + h->root.u.def.section->output_offset);
1879 rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
1880 rela.r_addend = 0;
1881 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1882 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1883 }
1884
1885 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1886 if (h == elf_hash_table (info)->hdynamic
1887 || h == elf_hash_table (info)->hgot)
1888 sym->st_shndx = SHN_ABS;
1889
1890 return TRUE;
1891 }
1892
1893 /* Finish up the dynamic sections. */
1894
1895 static bfd_boolean
1896 elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
1897 {
1898 bfd *dynobj;
1899 asection *sgot;
1900 asection *sdyn;
1901
1902 dynobj = elf_hash_table (info)->dynobj;
1903
1904 sgot = bfd_get_linker_section (dynobj, ".got.plt");
1905 BFD_ASSERT (sgot != NULL);
1906 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
1907
1908 if (elf_hash_table (info)->dynamic_sections_created)
1909 {
1910 asection *splt;
1911 Elf32_External_Dyn *dyncon, *dynconend;
1912
1913 splt = bfd_get_linker_section (dynobj, ".plt");
1914 BFD_ASSERT (splt != NULL && sdyn != NULL);
1915
1916 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1917 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1918 for (; dyncon < dynconend; dyncon++)
1919 {
1920 Elf_Internal_Dyn dyn;
1921 const char *name;
1922 asection *s;
1923
1924 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1925
1926 switch (dyn.d_tag)
1927 {
1928 default:
1929 break;
1930
1931 case DT_PLTGOT:
1932 name = ".got";
1933 goto get_vma;
1934 case DT_JMPREL:
1935 name = ".rela.plt";
1936 get_vma:
1937 s = bfd_get_section_by_name (output_bfd, name);
1938 BFD_ASSERT (s != NULL);
1939 dyn.d_un.d_ptr = s->vma;
1940 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1941 break;
1942
1943 case DT_PLTRELSZ:
1944 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1945 BFD_ASSERT (s != NULL);
1946 dyn.d_un.d_val = s->size;
1947 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1948 break;
1949
1950 case DT_RELASZ:
1951 /* The procedure linkage table relocs (DT_JMPREL) should
1952 not be included in the overall relocs (DT_RELA).
1953 Therefore, we override the DT_RELASZ entry here to
1954 make it not include the JMPREL relocs. Since the
1955 linker script arranges for .rela.plt to follow all
1956 other relocation sections, we don't have to worry
1957 about changing the DT_RELA entry. */
1958 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1959 if (s != NULL)
1960 dyn.d_un.d_val -= s->size;
1961 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1962 break;
1963 }
1964 }
1965
1966 /* Fill in the first entry in the procedure linkage table. */
1967 if (splt->size > 0)
1968 {
1969 memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
1970 bfd_put_32 (output_bfd,
1971 (sgot->output_section->vma
1972 + sgot->output_offset + 4
1973 - (splt->output_section->vma + 6)),
1974 splt->contents + 2);
1975 bfd_put_32 (output_bfd,
1976 (sgot->output_section->vma
1977 + sgot->output_offset + 8
1978 - (splt->output_section->vma + 12)),
1979 splt->contents + 8);
1980 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1981 = PLT_ENTRY_SIZE;
1982 }
1983 }
1984
1985 /* Fill in the first three entries in the global offset table. */
1986 if (sgot->size > 0)
1987 {
1988 if (sdyn == NULL)
1989 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1990 else
1991 bfd_put_32 (output_bfd,
1992 sdyn->output_section->vma + sdyn->output_offset,
1993 sgot->contents);
1994 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1995 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1996 }
1997
1998 if (elf_section_data (sgot->output_section) != NULL)
1999 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2000
2001 return TRUE;
2002 }
2003
2004 static enum elf_reloc_type_class
2005 elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
2006 const asection *rel_sec ATTRIBUTE_UNUSED,
2007 const Elf_Internal_Rela *rela)
2008 {
2009 switch ((int) ELF32_R_TYPE (rela->r_info))
2010 {
2011 case R_VAX_RELATIVE:
2012 return reloc_class_relative;
2013 case R_VAX_JMP_SLOT:
2014 return reloc_class_plt;
2015 case R_VAX_COPY:
2016 return reloc_class_copy;
2017 default:
2018 return reloc_class_normal;
2019 }
2020 }
2021
2022 static bfd_vma
2023 elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
2024 const arelent *rel ATTRIBUTE_UNUSED)
2025 {
2026 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
2027 }
2028
2029 #define TARGET_LITTLE_SYM vax_elf32_vec
2030 #define TARGET_LITTLE_NAME "elf32-vax"
2031 #define ELF_MACHINE_CODE EM_VAX
2032 #define ELF_MAXPAGESIZE 0x1000
2033
2034 #define elf_backend_create_dynamic_sections \
2035 _bfd_elf_create_dynamic_sections
2036 #define bfd_elf32_bfd_link_hash_table_create \
2037 elf_vax_link_hash_table_create
2038 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
2039
2040 #define elf_backend_check_relocs elf_vax_check_relocs
2041 #define elf_backend_adjust_dynamic_symbol \
2042 elf_vax_adjust_dynamic_symbol
2043 #define elf_backend_always_size_sections \
2044 elf_vax_always_size_sections
2045 #define elf_backend_size_dynamic_sections \
2046 elf_vax_size_dynamic_sections
2047 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
2048 #define elf_backend_relocate_section elf_vax_relocate_section
2049 #define elf_backend_finish_dynamic_symbol \
2050 elf_vax_finish_dynamic_symbol
2051 #define elf_backend_finish_dynamic_sections \
2052 elf_vax_finish_dynamic_sections
2053 #define elf_backend_reloc_type_class elf_vax_reloc_type_class
2054 #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
2055 #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
2056 #define elf_backend_plt_sym_val elf_vax_plt_sym_val
2057 #define bfd_elf32_bfd_merge_private_bfd_data \
2058 elf32_vax_merge_private_bfd_data
2059 #define bfd_elf32_bfd_set_private_flags \
2060 elf32_vax_set_private_flags
2061 #define bfd_elf32_bfd_print_private_bfd_data \
2062 elf32_vax_print_private_bfd_data
2063
2064 #define elf_backend_can_gc_sections 1
2065 #define elf_backend_want_got_plt 1
2066 #define elf_backend_plt_readonly 1
2067 #define elf_backend_want_plt_sym 0
2068 #define elf_backend_got_header_size 16
2069 #define elf_backend_rela_normal 1
2070
2071 #include "elf32-target.h"
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