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