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* elf.c (special_sections): Add .gnu.linkonce.b modelled on .bss.
[deliverable/binutils-gdb.git] / bfd / elf.c
CommitLineData
252b5132 1/* ELF executable support for BFD.
340b6d91
AC		 2
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004 Free Software Foundation, Inc.
252b5132 5
5e8d7549 6 This file is part of BFD, the Binary File Descriptor library.
252b5132 7
5e8d7549
NC		 8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
252b5132 12
5e8d7549
NC		 13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
252b5132 17
5e8d7549 18 You should have received a copy of the GNU General Public License
b34976b6 19 along with this program; if not, write to the Free Software
5e8d7549 20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
252b5132 21
661a3fd4 22/* SECTION
47d9a591 23
252b5132
RH		 24 ELF backends
25
26 BFD support for ELF formats is being worked on.
27 Currently, the best supported back ends are for sparc and i386
28 (running svr4 or Solaris 2).
29
30 Documentation of the internals of the support code still needs
31 to be written. The code is changing quickly enough that we
661a3fd4 32 haven't bothered yet. */
252b5132 33
7ee38065
MS		 34/* For sparc64-cross-sparc32. */
35#define _SYSCALL32
252b5132
RH		 36#include "bfd.h"
37#include "sysdep.h"
38#include "bfdlink.h"
39#include "libbfd.h"
40#define ARCH_SIZE 0
41#include "elf-bfd.h"
e0e8c97f 42#include "libiberty.h"
252b5132 43
217aa764 44static int elf_sort_sections (const void *, const void *);
c84fca4d 45static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
217aa764
AM		 46static bfd_boolean prep_headers (bfd *);
47static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
48static bfd_boolean elfcore_read_notes (bfd *, file_ptr, bfd_size_type) ;
50b2bdb7 49
252b5132
RH		 50/* Swap version information in and out. The version information is
51 currently size independent. If that ever changes, this code will
52 need to move into elfcode.h. */
53
54/* Swap in a Verdef structure. */
55
56void
217aa764
AM		 57_bfd_elf_swap_verdef_in (bfd *abfd,
58 const Elf_External_Verdef *src,
59 Elf_Internal_Verdef *dst)
252b5132 60{
dc810e39
AM		 61 dst->vd_version = H_GET_16 (abfd, src->vd_version);
62 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
63 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
64 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
65 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
66 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
67 dst->vd_next = H_GET_32 (abfd, src->vd_next);
252b5132
RH		 68}
69
70/* Swap out a Verdef structure. */
71
72void
217aa764
AM		 73_bfd_elf_swap_verdef_out (bfd *abfd,
74 const Elf_Internal_Verdef *src,
75 Elf_External_Verdef *dst)
252b5132 76{
dc810e39
AM		 77 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
78 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
79 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
80 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
81 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
82 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
83 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
252b5132
RH		 84}
85
86/* Swap in a Verdaux structure. */
87
88void
217aa764
AM		 89_bfd_elf_swap_verdaux_in (bfd *abfd,
90 const Elf_External_Verdaux *src,
91 Elf_Internal_Verdaux *dst)
252b5132 92{
dc810e39
AM		 93 dst->vda_name = H_GET_32 (abfd, src->vda_name);
94 dst->vda_next = H_GET_32 (abfd, src->vda_next);
252b5132
RH		 95}
96
97/* Swap out a Verdaux structure. */
98
99void
217aa764
AM		 100_bfd_elf_swap_verdaux_out (bfd *abfd,
101 const Elf_Internal_Verdaux *src,
102 Elf_External_Verdaux *dst)
252b5132 103{
dc810e39
AM		 104 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
105 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
252b5132
RH		 106}
107
108/* Swap in a Verneed structure. */
109
110void
217aa764
AM		 111_bfd_elf_swap_verneed_in (bfd *abfd,
112 const Elf_External_Verneed *src,
113 Elf_Internal_Verneed *dst)
252b5132 114{
dc810e39
AM		 115 dst->vn_version = H_GET_16 (abfd, src->vn_version);
116 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
117 dst->vn_file = H_GET_32 (abfd, src->vn_file);
118 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
119 dst->vn_next = H_GET_32 (abfd, src->vn_next);
252b5132
RH		 120}
121
122/* Swap out a Verneed structure. */
123
124void
217aa764
AM		 125_bfd_elf_swap_verneed_out (bfd *abfd,
126 const Elf_Internal_Verneed *src,
127 Elf_External_Verneed *dst)
252b5132 128{
dc810e39
AM		 129 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
130 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
131 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
132 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
133 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
252b5132
RH		 134}
135
136/* Swap in a Vernaux structure. */
137
138void
217aa764
AM		 139_bfd_elf_swap_vernaux_in (bfd *abfd,
140 const Elf_External_Vernaux *src,
141 Elf_Internal_Vernaux *dst)
252b5132 142{
dc810e39
AM		 143 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
144 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
145 dst->vna_other = H_GET_16 (abfd, src->vna_other);
146 dst->vna_name = H_GET_32 (abfd, src->vna_name);
147 dst->vna_next = H_GET_32 (abfd, src->vna_next);
252b5132
RH		 148}
149
150/* Swap out a Vernaux structure. */
151
152void
217aa764
AM		 153_bfd_elf_swap_vernaux_out (bfd *abfd,
154 const Elf_Internal_Vernaux *src,
155 Elf_External_Vernaux *dst)
252b5132 156{
dc810e39
AM		 157 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
158 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
159 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
160 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
161 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
252b5132
RH		 162}
163
164/* Swap in a Versym structure. */
165
166void
217aa764
AM		 167_bfd_elf_swap_versym_in (bfd *abfd,
168 const Elf_External_Versym *src,
169 Elf_Internal_Versym *dst)
252b5132 170{
dc810e39 171 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
252b5132
RH		 172}
173
174/* Swap out a Versym structure. */
175
176void
217aa764
AM		 177_bfd_elf_swap_versym_out (bfd *abfd,
178 const Elf_Internal_Versym *src,
179 Elf_External_Versym *dst)
252b5132 180{
dc810e39 181 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
252b5132
RH		 182}
183
184/* Standard ELF hash function. Do not change this function; you will
185 cause invalid hash tables to be generated. */
3a99b017 186
252b5132 187unsigned long
217aa764 188bfd_elf_hash (const char *namearg)
252b5132 189{
3a99b017 190 const unsigned char *name = (const unsigned char *) namearg;
252b5132
RH		 191 unsigned long h = 0;
192 unsigned long g;
193 int ch;
194
195 while ((ch = *name++) != '\0')
196 {
197 h = (h << 4) + ch;
198 if ((g = (h & 0xf0000000)) != 0)
199 {
200 h ^= g >> 24;
201 /* The ELF ABI says `h &= ~g', but this is equivalent in
202 this case and on some machines one insn instead of two. */
203 h ^= g;
204 }
205 }
32dfa85d 206 return h & 0xffffffff;
252b5132
RH		 207}
208
209/* Read a specified number of bytes at a specified offset in an ELF
210 file, into a newly allocated buffer, and return a pointer to the
c044fabd 211 buffer. */
252b5132
RH		 212
213static char *
217aa764 214elf_read (bfd *abfd, file_ptr offset, bfd_size_type size)
252b5132
RH		 215{
216 char *buf;
217
218 if ((buf = bfd_alloc (abfd, size)) == NULL)
219 return NULL;
dc810e39 220 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
252b5132 221 return NULL;
217aa764 222 if (bfd_bread (buf, size, abfd) != size)
252b5132
RH		 223 {
224 if (bfd_get_error () != bfd_error_system_call)
225 bfd_set_error (bfd_error_file_truncated);
226 return NULL;
227 }
228 return buf;
229}
230
b34976b6 231bfd_boolean
217aa764 232bfd_elf_mkobject (bfd *abfd)
252b5132 233{
c044fabd
KH		 234 /* This just does initialization. */
235 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
217aa764 236 elf_tdata (abfd) = bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
252b5132 237 if (elf_tdata (abfd) == 0)
b34976b6 238 return FALSE;
c044fabd
KH		 239 /* Since everything is done at close time, do we need any
240 initialization? */
252b5132 241
b34976b6 242 return TRUE;
252b5132
RH		 243}
244
b34976b6 245bfd_boolean
217aa764 246bfd_elf_mkcorefile (bfd *abfd)
252b5132 247{
c044fabd 248 /* I think this can be done just like an object file. */
252b5132
RH		 249 return bfd_elf_mkobject (abfd);
250}
251
252char *
217aa764 253bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
252b5132
RH		 254{
255 Elf_Internal_Shdr **i_shdrp;
256 char *shstrtab = NULL;
dc810e39
AM		 257 file_ptr offset;
258 bfd_size_type shstrtabsize;
252b5132
RH		 259
260 i_shdrp = elf_elfsections (abfd);
261 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
262 return 0;
263
264 shstrtab = (char *) i_shdrp[shindex]->contents;
265 if (shstrtab == NULL)
266 {
c044fabd 267 /* No cached one, attempt to read, and cache what we read. */
252b5132
RH		 268 offset = i_shdrp[shindex]->sh_offset;
269 shstrtabsize = i_shdrp[shindex]->sh_size;
270 shstrtab = elf_read (abfd, offset, shstrtabsize);
217aa764 271 i_shdrp[shindex]->contents = shstrtab;
252b5132
RH		 272 }
273 return shstrtab;
274}
275
276char *
217aa764
AM		 277bfd_elf_string_from_elf_section (bfd *abfd,
278 unsigned int shindex,
279 unsigned int strindex)
252b5132
RH		 280{
281 Elf_Internal_Shdr *hdr;
282
283 if (strindex == 0)
284 return "";
285
286 hdr = elf_elfsections (abfd)[shindex];
287
288 if (hdr->contents == NULL
289 && bfd_elf_get_str_section (abfd, shindex) == NULL)
290 return NULL;
291
292 if (strindex >= hdr->sh_size)
293 {
294 (*_bfd_error_handler)
d003868e
AM		 295 (_("%B: invalid string offset %u >= %lu for section `%s'"),
296 abfd, strindex, (unsigned long) hdr->sh_size,
252b5132
RH		 297 ((shindex == elf_elfheader(abfd)->e_shstrndx
298 && strindex == hdr->sh_name)
299 ? ".shstrtab"
300 : elf_string_from_elf_strtab (abfd, hdr->sh_name)));
301 return "";
302 }
303
304 return ((char *) hdr->contents) + strindex;
305}
306
6cdc0ccc
AM		 307/* Read and convert symbols to internal format.
308 SYMCOUNT specifies the number of symbols to read, starting from
309 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
310 are non-NULL, they are used to store the internal symbols, external
311 symbols, and symbol section index extensions, respectively. */
312
313Elf_Internal_Sym *
217aa764
AM		 314bfd_elf_get_elf_syms (bfd *ibfd,
315 Elf_Internal_Shdr *symtab_hdr,
316 size_t symcount,
317 size_t symoffset,
318 Elf_Internal_Sym *intsym_buf,
319 void *extsym_buf,
320 Elf_External_Sym_Shndx *extshndx_buf)
6cdc0ccc
AM		 321{
322 Elf_Internal_Shdr *shndx_hdr;
217aa764 323 void *alloc_ext;
df622259 324 const bfd_byte *esym;
6cdc0ccc
AM		 325 Elf_External_Sym_Shndx *alloc_extshndx;
326 Elf_External_Sym_Shndx *shndx;
327 Elf_Internal_Sym *isym;
328 Elf_Internal_Sym *isymend;
9c5bfbb7 329 const struct elf_backend_data *bed;
6cdc0ccc
AM		 330 size_t extsym_size;
331 bfd_size_type amt;
332 file_ptr pos;
333
334 if (symcount == 0)
335 return intsym_buf;
336
337 /* Normal syms might have section extension entries. */
338 shndx_hdr = NULL;
339 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
340 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
341
342 /* Read the symbols. */
343 alloc_ext = NULL;
344 alloc_extshndx = NULL;
345 bed = get_elf_backend_data (ibfd);
346 extsym_size = bed->s->sizeof_sym;
347 amt = symcount * extsym_size;
348 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
349 if (extsym_buf == NULL)
350 {
351 alloc_ext = bfd_malloc (amt);
352 extsym_buf = alloc_ext;
353 }
354 if (extsym_buf == NULL
355 || bfd_seek (ibfd, pos, SEEK_SET) != 0
356 || bfd_bread (extsym_buf, amt, ibfd) != amt)
357 {
358 intsym_buf = NULL;
359 goto out;
360 }
361
362 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
363 extshndx_buf = NULL;
364 else
365 {
366 amt = symcount * sizeof (Elf_External_Sym_Shndx);
367 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
368 if (extshndx_buf == NULL)
369 {
217aa764 370 alloc_extshndx = bfd_malloc (amt);
6cdc0ccc
AM		 371 extshndx_buf = alloc_extshndx;
372 }
373 if (extshndx_buf == NULL
374 || bfd_seek (ibfd, pos, SEEK_SET) != 0
375 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
376 {
377 intsym_buf = NULL;
378 goto out;
379 }
380 }
381
382 if (intsym_buf == NULL)
383 {
384 bfd_size_type amt = symcount * sizeof (Elf_Internal_Sym);
217aa764 385 intsym_buf = bfd_malloc (amt);
6cdc0ccc
AM		 386 if (intsym_buf == NULL)
387 goto out;
388 }
389
390 /* Convert the symbols to internal form. */
391 isymend = intsym_buf + symcount;
392 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
393 isym < isymend;
394 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
217aa764 395 (*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym);
6cdc0ccc
AM		 396
397 out:
398 if (alloc_ext != NULL)
399 free (alloc_ext);
400 if (alloc_extshndx != NULL)
401 free (alloc_extshndx);
402
403 return intsym_buf;
404}
405
5cab59f6
AM		 406/* Look up a symbol name. */
407const char *
217aa764 408bfd_elf_local_sym_name (bfd *abfd, Elf_Internal_Sym *isym)
5cab59f6
AM		 409{
410 unsigned int iname = isym->st_name;
411 unsigned int shindex = elf_tdata (abfd)->symtab_hdr.sh_link;
412 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION)
413 {
414 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
415 shindex = elf_elfheader (abfd)->e_shstrndx;
416 }
417
418 return bfd_elf_string_from_elf_section (abfd, shindex, iname);
419}
420
dbb410c3
AM		 421/* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
422 sections. The first element is the flags, the rest are section
423 pointers. */
424
425typedef union elf_internal_group {
426 Elf_Internal_Shdr *shdr;
427 unsigned int flags;
428} Elf_Internal_Group;
429
b885599b
AM		 430/* Return the name of the group signature symbol. Why isn't the
431 signature just a string? */
432
433static const char *
217aa764 434group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
b885599b 435{
9dce4196 436 Elf_Internal_Shdr *hdr;
9dce4196
AM		 437 unsigned char esym[sizeof (Elf64_External_Sym)];
438 Elf_External_Sym_Shndx eshndx;
439 Elf_Internal_Sym isym;
b885599b
AM		 440
441 /* First we need to ensure the symbol table is available. */
442 if (! bfd_section_from_shdr (abfd, ghdr->sh_link))
443 return NULL;
444
9dce4196
AM		 445 /* Go read the symbol. */
446 hdr = &elf_tdata (abfd)->symtab_hdr;
6cdc0ccc
AM		 447 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
448 &isym, esym, &eshndx) == NULL)
b885599b 449 return NULL;
9dce4196 450
5cab59f6 451 return bfd_elf_local_sym_name (abfd, &isym);
b885599b
AM		 452}
453
dbb410c3
AM		 454/* Set next_in_group list pointer, and group name for NEWSECT. */
455
b34976b6 456static bfd_boolean
217aa764 457setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
dbb410c3
AM		 458{
459 unsigned int num_group = elf_tdata (abfd)->num_group;
460
461 /* If num_group is zero, read in all SHT_GROUP sections. The count
462 is set to -1 if there are no SHT_GROUP sections. */
463 if (num_group == 0)
464 {
465 unsigned int i, shnum;
466
467 /* First count the number of groups. If we have a SHT_GROUP
468 section with just a flag word (ie. sh_size is 4), ignore it. */
9ad5cbcf 469 shnum = elf_numsections (abfd);
dbb410c3
AM		 470 num_group = 0;
471 for (i = 0; i < shnum; i++)
472 {
473 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
474 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
475 num_group += 1;
476 }
477
478 if (num_group == 0)
973ffd63 479 num_group = (unsigned) -1;
dbb410c3
AM		 480 elf_tdata (abfd)->num_group = num_group;
481
482 if (num_group > 0)
483 {
484 /* We keep a list of elf section headers for group sections,
485 so we can find them quickly. */
486 bfd_size_type amt = num_group * sizeof (Elf_Internal_Shdr *);
487 elf_tdata (abfd)->group_sect_ptr = bfd_alloc (abfd, amt);
488 if (elf_tdata (abfd)->group_sect_ptr == NULL)
b34976b6 489 return FALSE;
dbb410c3
AM		 490
491 num_group = 0;
492 for (i = 0; i < shnum; i++)
493 {
494 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
495 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
496 {
973ffd63 497 unsigned char *src;
dbb410c3
AM		 498 Elf_Internal_Group *dest;
499
500 /* Add to list of sections. */
501 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
502 num_group += 1;
503
504 /* Read the raw contents. */
505 BFD_ASSERT (sizeof (*dest) >= 4);
506 amt = shdr->sh_size * sizeof (*dest) / 4;
507 shdr->contents = bfd_alloc (abfd, amt);
508 if (shdr->contents == NULL
509 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
510 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
511 != shdr->sh_size))
b34976b6 512 return FALSE;
dbb410c3
AM		 513
514 /* Translate raw contents, a flag word followed by an
515 array of elf section indices all in target byte order,
516 to the flag word followed by an array of elf section
517 pointers. */
518 src = shdr->contents + shdr->sh_size;
519 dest = (Elf_Internal_Group *) (shdr->contents + amt);
520 while (1)
521 {
522 unsigned int idx;
523
524 src -= 4;
525 --dest;
526 idx = H_GET_32 (abfd, src);
527 if (src == shdr->contents)
528 {
529 dest->flags = idx;
b885599b
AM		 530 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
531 shdr->bfd_section->flags
532 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
dbb410c3
AM		 533 break;
534 }
535 if (idx >= shnum)
536 {
537 ((*_bfd_error_handler)
d003868e 538 (_("%B: invalid SHT_GROUP entry"), abfd));
dbb410c3
AM		 539 idx = 0;
540 }
541 dest->shdr = elf_elfsections (abfd)[idx];
542 }
543 }
544 }
545 }
546 }
547
548 if (num_group != (unsigned) -1)
549 {
550 unsigned int i;
551
552 for (i = 0; i < num_group; i++)
553 {
554 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
555 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
556 unsigned int n_elt = shdr->sh_size / 4;
557
558 /* Look through this group's sections to see if current
559 section is a member. */
560 while (--n_elt != 0)
561 if ((++idx)->shdr == hdr)
562 {
e0e8c97f 563 asection *s = NULL;
dbb410c3
AM		 564
565 /* We are a member of this group. Go looking through
566 other members to see if any others are linked via
567 next_in_group. */
568 idx = (Elf_Internal_Group *) shdr->contents;
569 n_elt = shdr->sh_size / 4;
570 while (--n_elt != 0)
571 if ((s = (++idx)->shdr->bfd_section) != NULL
945906ff 572 && elf_next_in_group (s) != NULL)
dbb410c3
AM		 573 break;
574 if (n_elt != 0)
575 {
dbb410c3
AM		 576 /* Snarf the group name from other member, and
577 insert current section in circular list. */
945906ff
AM		 578 elf_group_name (newsect) = elf_group_name (s);
579 elf_next_in_group (newsect) = elf_next_in_group (s);
580 elf_next_in_group (s) = newsect;
dbb410c3
AM		 581 }
582 else
583 {
dbb410c3
AM		 584 const char *gname;
585
b885599b
AM		 586 gname = group_signature (abfd, shdr);
587 if (gname == NULL)
b34976b6 588 return FALSE;
945906ff 589 elf_group_name (newsect) = gname;
dbb410c3
AM		 590
591 /* Start a circular list with one element. */
945906ff 592 elf_next_in_group (newsect) = newsect;
dbb410c3 593 }
b885599b 594
9dce4196
AM		 595 /* If the group section has been created, point to the
596 new member. */
dbb410c3 597 if (shdr->bfd_section != NULL)
945906ff 598 elf_next_in_group (shdr->bfd_section) = newsect;
b885599b 599
dbb410c3
AM		 600 i = num_group - 1;
601 break;
602 }
603 }
604 }
605
945906ff 606 if (elf_group_name (newsect) == NULL)
dbb410c3 607 {
d003868e
AM		 608 (*_bfd_error_handler) (_("%B: no group info for section %A"),
609 abfd, newsect);
dbb410c3 610 }
b34976b6 611 return TRUE;
dbb410c3
AM		 612}
613
3d7f7666
L		 614bfd_boolean
615_bfd_elf_setup_group_pointers (bfd *abfd)
616{
617 unsigned int i;
618 unsigned int num_group = elf_tdata (abfd)->num_group;
619 bfd_boolean result = TRUE;
620
621 if (num_group == (unsigned) -1)
622 return result;
623
624 for (i = 0; i < num_group; i++)
625 {
626 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
627 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
628 unsigned int n_elt = shdr->sh_size / 4;
629
630 while (--n_elt != 0)
631 if ((++idx)->shdr->bfd_section)
632 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
633 else if (idx->shdr->sh_type == SHT_RELA
634 || idx->shdr->sh_type == SHT_REL)
635 /* We won't include relocation sections in section groups in
636 output object files. We adjust the group section size here
637 so that relocatable link will work correctly when
638 relocation sections are in section group in input object
639 files. */
640 shdr->bfd_section->size -= 4;
641 else
642 {
643 /* There are some unknown sections in the group. */
644 (*_bfd_error_handler)
d003868e
AM		 645 (_("%B: unknown [%d] section `%s' in group [%s]"),
646 abfd,
3d7f7666
L		 647 (unsigned int) idx->shdr->sh_type,
648 elf_string_from_elf_strtab (abfd, idx->shdr->sh_name),
649 shdr->bfd_section->name);
650 result = FALSE;
651 }
652 }
653 return result;
654}
655
72adc230
AM		 656bfd_boolean
657bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
658{
659 return elf_next_in_group (sec) != NULL;
660}
661
b34976b6 662bfd_boolean
3d7f7666
L		 663bfd_elf_discard_group (bfd *abfd ATTRIBUTE_UNUSED,
664 asection *group ATTRIBUTE_UNUSED)
b885599b 665{
3d7f7666 666#if 0
b885599b
AM		 667 asection *first = elf_next_in_group (group);
668 asection *s = first;
669
670 while (s != NULL)
671 {
672 s->output_section = bfd_abs_section_ptr;
673 s = elf_next_in_group (s);
674 /* These lists are circular. */
675 if (s == first)
676 break;
677 }
3d7f7666
L		 678#else
679 /* FIXME: Never used. Remove it! */
680 abort ();
681#endif
b34976b6 682 return TRUE;
b885599b
AM		 683}
684
252b5132
RH		 685/* Make a BFD section from an ELF section. We store a pointer to the
686 BFD section in the bfd_section field of the header. */
687
b34976b6 688bfd_boolean
217aa764
AM		 689_bfd_elf_make_section_from_shdr (bfd *abfd,
690 Elf_Internal_Shdr *hdr,
691 const char *name)
252b5132
RH		 692{
693 asection *newsect;
694 flagword flags;
9c5bfbb7 695 const struct elf_backend_data *bed;
252b5132
RH		 696
697 if (hdr->bfd_section != NULL)
698 {
699 BFD_ASSERT (strcmp (name,
700 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
b34976b6 701 return TRUE;
252b5132
RH		 702 }
703
704 newsect = bfd_make_section_anyway (abfd, name);
705 if (newsect == NULL)
b34976b6 706 return FALSE;
252b5132 707
1829f4b2
AM		 708 hdr->bfd_section = newsect;
709 elf_section_data (newsect)->this_hdr = *hdr;
710
2f89ff8d
L		 711 /* Always use the real type/flags. */
712 elf_section_type (newsect) = hdr->sh_type;
713 elf_section_flags (newsect) = hdr->sh_flags;
714
252b5132
RH		 715 newsect->filepos = hdr->sh_offset;
716
717 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
718 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
719 || ! bfd_set_section_alignment (abfd, newsect,
dc810e39 720 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
b34976b6 721 return FALSE;
252b5132
RH		 722
723 flags = SEC_NO_FLAGS;
724 if (hdr->sh_type != SHT_NOBITS)
725 flags |= SEC_HAS_CONTENTS;
dbb410c3 726 if (hdr->sh_type == SHT_GROUP)
b3096250 727 flags |= SEC_GROUP | SEC_EXCLUDE;
252b5132
RH		 728 if ((hdr->sh_flags & SHF_ALLOC) != 0)
729 {
730 flags |= SEC_ALLOC;
731 if (hdr->sh_type != SHT_NOBITS)
732 flags |= SEC_LOAD;
733 }
734 if ((hdr->sh_flags & SHF_WRITE) == 0)
735 flags |= SEC_READONLY;
736 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
737 flags |= SEC_CODE;
738 else if ((flags & SEC_LOAD) != 0)
739 flags |= SEC_DATA;
f5fa8ca2
JJ		 740 if ((hdr->sh_flags & SHF_MERGE) != 0)
741 {
742 flags |= SEC_MERGE;
743 newsect->entsize = hdr->sh_entsize;
744 if ((hdr->sh_flags & SHF_STRINGS) != 0)
745 flags |= SEC_STRINGS;
746 }
dbb410c3
AM		 747 if (hdr->sh_flags & SHF_GROUP)
748 if (!setup_group (abfd, hdr, newsect))
b34976b6 749 return FALSE;
13ae64f3
JJ		 750 if ((hdr->sh_flags & SHF_TLS) != 0)
751 flags |= SEC_THREAD_LOCAL;
252b5132
RH		 752
753 /* The debugging sections appear to be recognized only by name, not
754 any sort of flag. */
7a6cc5fb 755 {
dbf48117 756 static const char *debug_sec_names [] =
7a6cc5fb
NC		 757 {
758 ".debug",
759 ".gnu.linkonce.wi.",
760 ".line",
761 ".stab"
762 };
763 int i;
764
e0e8c97f 765 for (i = ARRAY_SIZE (debug_sec_names); i--;)
7a6cc5fb
NC		 766 if (strncmp (name, debug_sec_names[i], strlen (debug_sec_names[i])) == 0)
767 break;
768
769 if (i >= 0)
770 flags |= SEC_DEBUGGING;
771 }
252b5132
RH		 772
773 /* As a GNU extension, if the name begins with .gnu.linkonce, we
774 only link a single copy of the section. This is used to support
775 g++. g++ will emit each template expansion in its own section.
776 The symbols will be defined as weak, so that multiple definitions
777 are permitted. The GNU linker extension is to actually discard
778 all but one of the sections. */
b885599b
AM		 779 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
780 && elf_next_in_group (newsect) == NULL)
252b5132
RH		 781 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
782
fa152c49
JW		 783 bed = get_elf_backend_data (abfd);
784 if (bed->elf_backend_section_flags)
785 if (! bed->elf_backend_section_flags (&flags, hdr))
b34976b6 786 return FALSE;
fa152c49 787
252b5132 788 if (! bfd_set_section_flags (abfd, newsect, flags))
b34976b6 789 return FALSE;
252b5132
RH		 790
791 if ((flags & SEC_ALLOC) != 0)
792 {
793 Elf_Internal_Phdr *phdr;
794 unsigned int i;
795
796 /* Look through the phdrs to see if we need to adjust the lma.
797 If all the p_paddr fields are zero, we ignore them, since
798 some ELF linkers produce such output. */
799 phdr = elf_tdata (abfd)->phdr;
800 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
801 {
802 if (phdr->p_paddr != 0)
803 break;
804 }
805 if (i < elf_elfheader (abfd)->e_phnum)
806 {
807 phdr = elf_tdata (abfd)->phdr;
808 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
809 {
e0e8c97f
NC		 810 /* This section is part of this segment if its file
811 offset plus size lies within the segment's memory
812 span and, if the section is loaded, the extent of the
47d9a591 813 loaded data lies within the extent of the segment.
bf36db18
NC		 814
815 Note - we used to check the p_paddr field as well, and
816 refuse to set the LMA if it was 0. This is wrong
dba143ef 817 though, as a perfectly valid initialised segment can
bf36db18 818 have a p_paddr of zero. Some architectures, eg ARM,
dba143ef 819 place special significance on the address 0 and
bf36db18
NC		 820 executables need to be able to have a segment which
821 covers this address. */
252b5132 822 if (phdr->p_type == PT_LOAD
e0e8c97f
NC		 823 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
824 && (hdr->sh_offset + hdr->sh_size
825 <= phdr->p_offset + phdr->p_memsz)
252b5132 826 && ((flags & SEC_LOAD) == 0
d7866f04
AM		 827 || (hdr->sh_offset + hdr->sh_size
828 <= phdr->p_offset + phdr->p_filesz)))
252b5132 829 {
dba143ef 830 if ((flags & SEC_LOAD) == 0)
d7866f04
AM		 831 newsect->lma = (phdr->p_paddr
832 + hdr->sh_addr - phdr->p_vaddr);
dba143ef
AM		 833 else
834 /* We used to use the same adjustment for SEC_LOAD
835 sections, but that doesn't work if the segment
836 is packed with code from multiple VMAs.
837 Instead we calculate the section LMA based on
838 the segment LMA. It is assumed that the
839 segment will contain sections with contiguous
840 LMAs, even if the VMAs are not. */
841 newsect->lma = (phdr->p_paddr
842 + hdr->sh_offset - phdr->p_offset);
d7866f04
AM		 843
844 /* With contiguous segments, we can't tell from file
845 offsets whether a section with zero size should
846 be placed at the end of one segment or the
847 beginning of the next. Decide based on vaddr. */
848 if (hdr->sh_addr >= phdr->p_vaddr
849 && (hdr->sh_addr + hdr->sh_size
850 <= phdr->p_vaddr + phdr->p_memsz))
851 break;
252b5132
RH		 852 }
853 }
854 }
855 }
856
b34976b6 857 return TRUE;
252b5132
RH		 858}
859
860/*
861INTERNAL_FUNCTION
862 bfd_elf_find_section
863
864SYNOPSIS
865 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
866
867DESCRIPTION
868 Helper functions for GDB to locate the string tables.
869 Since BFD hides string tables from callers, GDB needs to use an
870 internal hook to find them. Sun's .stabstr, in particular,
871 isn't even pointed to by the .stab section, so ordinary
872 mechanisms wouldn't work to find it, even if we had some.
873*/
874
875struct elf_internal_shdr *
217aa764 876bfd_elf_find_section (bfd *abfd, char *name)
252b5132
RH		 877{
878 Elf_Internal_Shdr **i_shdrp;
879 char *shstrtab;
880 unsigned int max;
881 unsigned int i;
882
883 i_shdrp = elf_elfsections (abfd);
884 if (i_shdrp != NULL)
885 {
9ad5cbcf
AM		 886 shstrtab = bfd_elf_get_str_section (abfd,
887 elf_elfheader (abfd)->e_shstrndx);
252b5132
RH		 888 if (shstrtab != NULL)
889 {
9ad5cbcf 890 max = elf_numsections (abfd);
252b5132
RH		 891 for (i = 1; i < max; i++)
892 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
893 return i_shdrp[i];
894 }
895 }
896 return 0;
897}
898
899const char *const bfd_elf_section_type_names[] = {
900 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
901 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
902 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
903};
904
1049f94e 905/* ELF relocs are against symbols. If we are producing relocatable
252b5132
RH		 906 output, and the reloc is against an external symbol, and nothing
907 has given us any additional addend, the resulting reloc will also
908 be against the same symbol. In such a case, we don't want to
909 change anything about the way the reloc is handled, since it will
910 all be done at final link time. Rather than put special case code
911 into bfd_perform_relocation, all the reloc types use this howto
912 function. It just short circuits the reloc if producing
1049f94e 913 relocatable output against an external symbol. */
252b5132 914
252b5132 915bfd_reloc_status_type
217aa764
AM		 916bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
917 arelent *reloc_entry,
918 asymbol *symbol,
919 void *data ATTRIBUTE_UNUSED,
920 asection *input_section,
921 bfd *output_bfd,
922 char **error_message ATTRIBUTE_UNUSED)
923{
924 if (output_bfd != NULL
252b5132
RH		 925 && (symbol->flags & BSF_SECTION_SYM) == 0
926 && (! reloc_entry->howto->partial_inplace
927 || reloc_entry->addend == 0))
928 {
929 reloc_entry->address += input_section->output_offset;
930 return bfd_reloc_ok;
931 }
932
933 return bfd_reloc_continue;
934}
935\f
d3c456e9
JJ		 936/* Make sure sec_info_type is cleared if sec_info is cleared too. */
937
938static void
217aa764
AM		 939merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED,
940 asection *sec)
d3c456e9 941{
68bfbfcc
AM		 942 BFD_ASSERT (sec->sec_info_type == ELF_INFO_TYPE_MERGE);
943 sec->sec_info_type = ELF_INFO_TYPE_NONE;
d3c456e9
JJ		 944}
945
8550eb6e
JJ		 946/* Finish SHF_MERGE section merging. */
947
b34976b6 948bfd_boolean
217aa764 949_bfd_elf_merge_sections (bfd *abfd, struct bfd_link_info *info)
8550eb6e 950{
57ceae94
AM		 951 bfd *ibfd;
952 asection *sec;
953
0eddce27 954 if (!is_elf_hash_table (info->hash))
b34976b6 955 return FALSE;
57ceae94
AM		 956
957 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
958 if ((ibfd->flags & DYNAMIC) == 0)
959 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
960 if ((sec->flags & SEC_MERGE) != 0
961 && !bfd_is_abs_section (sec->output_section))
962 {
963 struct bfd_elf_section_data *secdata;
964
965 secdata = elf_section_data (sec);
966 if (! _bfd_add_merge_section (abfd,
967 &elf_hash_table (info)->merge_info,
968 sec, &secdata->sec_info))
969 return FALSE;
970 else if (secdata->sec_info)
971 sec->sec_info_type = ELF_INFO_TYPE_MERGE;
972 }
973
974 if (elf_hash_table (info)->merge_info != NULL)
975 _bfd_merge_sections (abfd, info, elf_hash_table (info)->merge_info,
d3c456e9 976 merge_sections_remove_hook);
b34976b6 977 return TRUE;
8550eb6e 978}
2d653fc7
AM		 979
980void
217aa764 981_bfd_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
2d653fc7
AM		 982{
983 sec->output_section = bfd_abs_section_ptr;
984 sec->output_offset = sec->vma;
0eddce27 985 if (!is_elf_hash_table (info->hash))
2d653fc7
AM		 986 return;
987
68bfbfcc 988 sec->sec_info_type = ELF_INFO_TYPE_JUST_SYMS;
2d653fc7 989}
8550eb6e 990\f
0ac4564e
L		 991/* Copy the program header and other data from one object module to
992 another. */
252b5132 993
b34976b6 994bfd_boolean
217aa764 995_bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
2d502050
L		 996{
997 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
998 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
b34976b6 999 return TRUE;
2d502050
L		 1000
1001 BFD_ASSERT (!elf_flags_init (obfd)
1002 || (elf_elfheader (obfd)->e_flags
1003 == elf_elfheader (ibfd)->e_flags));
1004
0ac4564e 1005 elf_gp (obfd) = elf_gp (ibfd);
2d502050 1006 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
b34976b6
AM		 1007 elf_flags_init (obfd) = TRUE;
1008 return TRUE;
2d502050
L		 1009}
1010
f0b79d91
L		 1011/* Print out the program headers. */
1012
b34976b6 1013bfd_boolean
217aa764 1014_bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
252b5132 1015{
217aa764 1016 FILE *f = farg;
252b5132
RH		 1017 Elf_Internal_Phdr *p;
1018 asection *s;
1019 bfd_byte *dynbuf = NULL;
1020
1021 p = elf_tdata (abfd)->phdr;
1022 if (p != NULL)
1023 {
1024 unsigned int i, c;
1025
1026 fprintf (f, _("\nProgram Header:\n"));
1027 c = elf_elfheader (abfd)->e_phnum;
1028 for (i = 0; i < c; i++, p++)
1029 {
dc810e39 1030 const char *pt;
252b5132
RH		 1031 char buf[20];
1032
1033 switch (p->p_type)
1034 {
dc810e39
AM		 1035 case PT_NULL: pt = "NULL"; break;
1036 case PT_LOAD: pt = "LOAD"; break;
1037 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1038 case PT_INTERP: pt = "INTERP"; break;
1039 case PT_NOTE: pt = "NOTE"; break;
1040 case PT_SHLIB: pt = "SHLIB"; break;
1041 case PT_PHDR: pt = "PHDR"; break;
13ae64f3 1042 case PT_TLS: pt = "TLS"; break;
65765700 1043 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
9ee5e499 1044 case PT_GNU_STACK: pt = "STACK"; break;
8c37241b 1045 case PT_GNU_RELRO: pt = "RELRO"; break;
dc810e39 1046 default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
252b5132 1047 }
dc810e39 1048 fprintf (f, "%8s off 0x", pt);
60b89a18 1049 bfd_fprintf_vma (abfd, f, p->p_offset);
252b5132 1050 fprintf (f, " vaddr 0x");
60b89a18 1051 bfd_fprintf_vma (abfd, f, p->p_vaddr);
252b5132 1052 fprintf (f, " paddr 0x");
60b89a18 1053 bfd_fprintf_vma (abfd, f, p->p_paddr);
252b5132
RH		 1054 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1055 fprintf (f, " filesz 0x");
60b89a18 1056 bfd_fprintf_vma (abfd, f, p->p_filesz);
252b5132 1057 fprintf (f, " memsz 0x");
60b89a18 1058 bfd_fprintf_vma (abfd, f, p->p_memsz);
252b5132
RH		 1059 fprintf (f, " flags %c%c%c",
1060 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1061 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1062 (p->p_flags & PF_X) != 0 ? 'x' : '-');
dc810e39
AM		 1063 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1064 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
252b5132
RH		 1065 fprintf (f, "\n");
1066 }
1067 }
1068
1069 s = bfd_get_section_by_name (abfd, ".dynamic");
1070 if (s != NULL)
1071 {
1072 int elfsec;
dc810e39 1073 unsigned long shlink;
252b5132
RH		 1074 bfd_byte *extdyn, *extdynend;
1075 size_t extdynsize;
217aa764 1076 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
252b5132
RH		 1077
1078 fprintf (f, _("\nDynamic Section:\n"));
1079
eea6121a 1080 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
252b5132
RH		 1081 goto error_return;
1082
1083 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1084 if (elfsec == -1)
1085 goto error_return;
dc810e39 1086 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
252b5132
RH		 1087
1088 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1089 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1090
1091 extdyn = dynbuf;
eea6121a 1092 extdynend = extdyn + s->size;
252b5132
RH		 1093 for (; extdyn < extdynend; extdyn += extdynsize)
1094 {
1095 Elf_Internal_Dyn dyn;
1096 const char *name;
1097 char ab[20];
b34976b6 1098 bfd_boolean stringp;
252b5132 1099
217aa764 1100 (*swap_dyn_in) (abfd, extdyn, &dyn);
252b5132
RH		 1101
1102 if (dyn.d_tag == DT_NULL)
1103 break;
1104
b34976b6 1105 stringp = FALSE;
252b5132
RH		 1106 switch (dyn.d_tag)
1107 {
1108 default:
1109 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1110 name = ab;
1111 break;
1112
b34976b6 1113 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
252b5132
RH		 1114 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1115 case DT_PLTGOT: name = "PLTGOT"; break;
1116 case DT_HASH: name = "HASH"; break;
1117 case DT_STRTAB: name = "STRTAB"; break;
1118 case DT_SYMTAB: name = "SYMTAB"; break;
1119 case DT_RELA: name = "RELA"; break;
1120 case DT_RELASZ: name = "RELASZ"; break;
1121 case DT_RELAENT: name = "RELAENT"; break;
1122 case DT_STRSZ: name = "STRSZ"; break;
1123 case DT_SYMENT: name = "SYMENT"; break;
1124 case DT_INIT: name = "INIT"; break;
1125 case DT_FINI: name = "FINI"; break;
b34976b6
AM		 1126 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1127 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
252b5132
RH		 1128 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1129 case DT_REL: name = "REL"; break;
1130 case DT_RELSZ: name = "RELSZ"; break;
1131 case DT_RELENT: name = "RELENT"; break;
1132 case DT_PLTREL: name = "PLTREL"; break;
1133 case DT_DEBUG: name = "DEBUG"; break;
1134 case DT_TEXTREL: name = "TEXTREL"; break;
1135 case DT_JMPREL: name = "JMPREL"; break;
94558834
L		 1136 case DT_BIND_NOW: name = "BIND_NOW"; break;
1137 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1138 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1139 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1140 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
b34976b6 1141 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
94558834
L		 1142 case DT_FLAGS: name = "FLAGS"; break;
1143 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1144 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
d48188b9 1145 case DT_CHECKSUM: name = "CHECKSUM"; break;
94558834
L		 1146 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1147 case DT_MOVEENT: name = "MOVEENT"; break;
1148 case DT_MOVESZ: name = "MOVESZ"; break;
1149 case DT_FEATURE: name = "FEATURE"; break;
1150 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1151 case DT_SYMINSZ: name = "SYMINSZ"; break;
1152 case DT_SYMINENT: name = "SYMINENT"; break;
b34976b6
AM		 1153 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1154 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1155 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
94558834
L		 1156 case DT_PLTPAD: name = "PLTPAD"; break;
1157 case DT_MOVETAB: name = "MOVETAB"; break;
1158 case DT_SYMINFO: name = "SYMINFO"; break;
1159 case DT_RELACOUNT: name = "RELACOUNT"; break;
1160 case DT_RELCOUNT: name = "RELCOUNT"; break;
1161 case DT_FLAGS_1: name = "FLAGS_1"; break;
252b5132
RH		 1162 case DT_VERSYM: name = "VERSYM"; break;
1163 case DT_VERDEF: name = "VERDEF"; break;
1164 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1165 case DT_VERNEED: name = "VERNEED"; break;
1166 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
b34976b6 1167 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
94558834 1168 case DT_USED: name = "USED"; break;
b34976b6 1169 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
252b5132
RH		 1170 }
1171
1172 fprintf (f, " %-11s ", name);
1173 if (! stringp)
1174 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1175 else
1176 {
1177 const char *string;
dc810e39 1178 unsigned int tagv = dyn.d_un.d_val;
252b5132 1179
dc810e39 1180 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
252b5132
RH		 1181 if (string == NULL)
1182 goto error_return;
1183 fprintf (f, "%s", string);
1184 }
1185 fprintf (f, "\n");
1186 }
1187
1188 free (dynbuf);
1189 dynbuf = NULL;
1190 }
1191
1192 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1193 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1194 {
1195 if (! _bfd_elf_slurp_version_tables (abfd))
b34976b6 1196 return FALSE;
252b5132
RH		 1197 }
1198
1199 if (elf_dynverdef (abfd) != 0)
1200 {
1201 Elf_Internal_Verdef *t;
1202
1203 fprintf (f, _("\nVersion definitions:\n"));
1204 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1205 {
1206 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1207 t->vd_flags, t->vd_hash, t->vd_nodename);
1208 if (t->vd_auxptr->vda_nextptr != NULL)
1209 {
1210 Elf_Internal_Verdaux *a;
1211
1212 fprintf (f, "\t");
1213 for (a = t->vd_auxptr->vda_nextptr;
1214 a != NULL;
1215 a = a->vda_nextptr)
1216 fprintf (f, "%s ", a->vda_nodename);
1217 fprintf (f, "\n");
1218 }
1219 }
1220 }
1221
1222 if (elf_dynverref (abfd) != 0)
1223 {
1224 Elf_Internal_Verneed *t;
1225
1226 fprintf (f, _("\nVersion References:\n"));
1227 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1228 {
1229 Elf_Internal_Vernaux *a;
1230
1231 fprintf (f, _(" required from %s:\n"), t->vn_filename);
1232 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1233 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1234 a->vna_flags, a->vna_other, a->vna_nodename);
1235 }
1236 }
1237
b34976b6 1238 return TRUE;
252b5132
RH		 1239
1240 error_return:
1241 if (dynbuf != NULL)
1242 free (dynbuf);
b34976b6 1243 return FALSE;
252b5132
RH		 1244}
1245
1246/* Display ELF-specific fields of a symbol. */
1247
1248void
217aa764
AM		 1249bfd_elf_print_symbol (bfd *abfd,
1250 void *filep,
1251 asymbol *symbol,
1252 bfd_print_symbol_type how)
252b5132 1253{
217aa764 1254 FILE *file = filep;
252b5132
RH		 1255 switch (how)
1256 {
1257 case bfd_print_symbol_name:
1258 fprintf (file, "%s", symbol->name);
1259 break;
1260 case bfd_print_symbol_more:
1261 fprintf (file, "elf ");
60b89a18 1262 bfd_fprintf_vma (abfd, file, symbol->value);
252b5132
RH		 1263 fprintf (file, " %lx", (long) symbol->flags);
1264 break;
1265 case bfd_print_symbol_all:
1266 {
4e8a9624
AM		 1267 const char *section_name;
1268 const char *name = NULL;
9c5bfbb7 1269 const struct elf_backend_data *bed;
7a13edea 1270 unsigned char st_other;
dbb410c3 1271 bfd_vma val;
c044fabd 1272
252b5132 1273 section_name = symbol->section ? symbol->section->name : "(*none*)";
587ff49e
RH		 1274
1275 bed = get_elf_backend_data (abfd);
1276 if (bed->elf_backend_print_symbol_all)
c044fabd 1277 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
587ff49e
RH		 1278
1279 if (name == NULL)
1280 {
7ee38065 1281 name = symbol->name;
217aa764 1282 bfd_print_symbol_vandf (abfd, file, symbol);
587ff49e
RH		 1283 }
1284
252b5132
RH		 1285 fprintf (file, " %s\t", section_name);
1286 /* Print the "other" value for a symbol. For common symbols,
1287 we've already printed the size; now print the alignment.
1288 For other symbols, we have no specified alignment, and
1289 we've printed the address; now print the size. */
dbb410c3
AM		 1290 if (bfd_is_com_section (symbol->section))
1291 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1292 else
1293 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1294 bfd_fprintf_vma (abfd, file, val);
252b5132
RH		 1295
1296 /* If we have version information, print it. */
1297 if (elf_tdata (abfd)->dynversym_section != 0
1298 && (elf_tdata (abfd)->dynverdef_section != 0
1299 || elf_tdata (abfd)->dynverref_section != 0))
1300 {
1301 unsigned int vernum;
1302 const char *version_string;
1303
1304 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1305
1306 if (vernum == 0)
1307 version_string = "";
1308 else if (vernum == 1)
1309 version_string = "Base";
1310 else if (vernum <= elf_tdata (abfd)->cverdefs)
1311 version_string =
1312 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1313 else
1314 {
1315 Elf_Internal_Verneed *t;
1316
1317 version_string = "";
1318 for (t = elf_tdata (abfd)->verref;
1319 t != NULL;
1320 t = t->vn_nextref)
1321 {
1322 Elf_Internal_Vernaux *a;
1323
1324 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1325 {
1326 if (a->vna_other == vernum)
1327 {
1328 version_string = a->vna_nodename;
1329 break;
1330 }
1331 }
1332 }
1333 }
1334
1335 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1336 fprintf (file, " %-11s", version_string);
1337 else
1338 {
1339 int i;
1340
1341 fprintf (file, " (%s)", version_string);
1342 for (i = 10 - strlen (version_string); i > 0; --i)
1343 putc (' ', file);
1344 }
1345 }
1346
1347 /* If the st_other field is not zero, print it. */
7a13edea 1348 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
c044fabd 1349
7a13edea
NC		 1350 switch (st_other)
1351 {
1352 case 0: break;
1353 case STV_INTERNAL: fprintf (file, " .internal"); break;
1354 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1355 case STV_PROTECTED: fprintf (file, " .protected"); break;
1356 default:
1357 /* Some other non-defined flags are also present, so print
1358 everything hex. */
1359 fprintf (file, " 0x%02x", (unsigned int) st_other);
1360 }
252b5132 1361
587ff49e 1362 fprintf (file, " %s", name);
252b5132
RH		 1363 }
1364 break;
1365 }
1366}
1367\f
1368/* Create an entry in an ELF linker hash table. */
1369
1370struct bfd_hash_entry *
217aa764
AM		 1371_bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
1372 struct bfd_hash_table *table,
1373 const char *string)
252b5132 1374{
252b5132
RH		 1375 /* Allocate the structure if it has not already been allocated by a
1376 subclass. */
51b64d56
AM		 1377 if (entry == NULL)
1378 {
1379 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1380 if (entry == NULL)
1381 return entry;
1382 }
252b5132
RH		 1383
1384 /* Call the allocation method of the superclass. */
51b64d56
AM		 1385 entry = _bfd_link_hash_newfunc (entry, table, string);
1386 if (entry != NULL)
252b5132 1387 {
51b64d56
AM		 1388 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1389 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1390
252b5132
RH		 1391 /* Set local fields. */
1392 ret->indx = -1;
252b5132
RH		 1393 ret->dynindx = -1;
1394 ret->dynstr_index = 0;
73722af0 1395 ret->elf_hash_value = 0;
252b5132 1396 ret->weakdef = NULL;
252b5132 1397 ret->verinfo.verdef = NULL;
252b5132 1398 ret->vtable_entries_size = 0;
73722af0 1399 ret->vtable_entries_used = NULL;
252b5132 1400 ret->vtable_parent = NULL;
5cab59f6
AM		 1401 ret->got = htab->init_refcount;
1402 ret->plt = htab->init_refcount;
73722af0 1403 ret->size = 0;
252b5132
RH		 1404 ret->type = STT_NOTYPE;
1405 ret->other = 0;
1406 /* Assume that we have been called by a non-ELF symbol reader.
1407 This flag is then reset by the code which reads an ELF input
1408 file. This ensures that a symbol created by a non-ELF symbol
1409 reader will have the flag set correctly. */
1410 ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
1411 }
1412
51b64d56 1413 return entry;
252b5132
RH		 1414}
1415
2920b85c 1416/* Copy data from an indirect symbol to its direct symbol, hiding the
0a991dfe 1417 old indirect symbol. Also used for copying flags to a weakdef. */
2920b85c 1418
c61b8717 1419void
9c5bfbb7 1420_bfd_elf_link_hash_copy_indirect (const struct elf_backend_data *bed,
217aa764
AM		 1421 struct elf_link_hash_entry *dir,
1422 struct elf_link_hash_entry *ind)
2920b85c 1423{
3c3e9281 1424 bfd_signed_vma tmp;
b48fa14c 1425 bfd_signed_vma lowest_valid = bed->can_refcount;
3c3e9281 1426
2920b85c
RH		 1427 /* Copy down any references that we may have already seen to the
1428 symbol which just became indirect. */
1429
3addb0a9 1430 dir->elf_link_hash_flags
0eddce27
AM		 1431 |= ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
1432 | ELF_LINK_HASH_REF_REGULAR
1433 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1434 | ELF_LINK_NON_GOT_REF
1435 | ELF_LINK_HASH_NEEDS_PLT
1436 | ELF_LINK_POINTER_EQUALITY_NEEDED);
2920b85c 1437
1e370bd2 1438 if (ind->root.type != bfd_link_hash_indirect)
0a991dfe
AM		 1439 return;
1440
51b64d56 1441 /* Copy over the global and procedure linkage table refcount entries.
2920b85c 1442 These may have been already set up by a check_relocs routine. */
3c3e9281 1443 tmp = dir->got.refcount;
b48fa14c 1444 if (tmp < lowest_valid)
2920b85c 1445 {
51b64d56 1446 dir->got.refcount = ind->got.refcount;
3c3e9281 1447 ind->got.refcount = tmp;
2920b85c 1448 }
3c3e9281 1449 else
b48fa14c 1450 BFD_ASSERT (ind->got.refcount < lowest_valid);
2920b85c 1451
3c3e9281 1452 tmp = dir->plt.refcount;
b48fa14c 1453 if (tmp < lowest_valid)
2920b85c 1454 {
51b64d56 1455 dir->plt.refcount = ind->plt.refcount;
3c3e9281 1456 ind->plt.refcount = tmp;
2920b85c 1457 }
3c3e9281 1458 else
b48fa14c 1459 BFD_ASSERT (ind->plt.refcount < lowest_valid);
2920b85c
RH		 1460
1461 if (dir->dynindx == -1)
1462 {
1463 dir->dynindx = ind->dynindx;
1464 dir->dynstr_index = ind->dynstr_index;
1465 ind->dynindx = -1;
1466 ind->dynstr_index = 0;
1467 }
3c3e9281
AM		 1468 else
1469 BFD_ASSERT (ind->dynindx == -1);
2920b85c
RH		 1470}
1471
c61b8717 1472void
217aa764
AM		 1473_bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info,
1474 struct elf_link_hash_entry *h,
1475 bfd_boolean force_local)
2920b85c 1476{
5cab59f6 1477 h->plt = elf_hash_table (info)->init_offset;
e5094212
AM		 1478 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1479 if (force_local)
1480 {
1481 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
1482 if (h->dynindx != -1)
1483 {
1484 h->dynindx = -1;
1485 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1486 h->dynstr_index);
1487 }
1488 }
2920b85c
RH		 1489}
1490
252b5132
RH		 1491/* Initialize an ELF linker hash table. */
1492
b34976b6 1493bfd_boolean
217aa764
AM		 1494_bfd_elf_link_hash_table_init
1495 (struct elf_link_hash_table *table,
1496 bfd *abfd,
1497 struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
1498 struct bfd_hash_table *,
1499 const char *))
252b5132 1500{
b34976b6 1501 bfd_boolean ret;
8ea2e4bd 1502
b34976b6 1503 table->dynamic_sections_created = FALSE;
252b5132 1504 table->dynobj = NULL;
963f13ec
AO		 1505 /* Make sure can_refcount is extended to the width and signedness of
1506 init_refcount before we subtract one from it. */
5cab59f6
AM		 1507 table->init_refcount.refcount = get_elf_backend_data (abfd)->can_refcount;
1508 table->init_refcount.refcount -= 1;
1509 table->init_offset.offset = -(bfd_vma) 1;
252b5132
RH		 1510 /* The first dynamic symbol is a dummy. */
1511 table->dynsymcount = 1;
1512 table->dynstr = NULL;
1513 table->bucketcount = 0;
1514 table->needed = NULL;
1515 table->hgot = NULL;
f5fa8ca2 1516 table->merge_info = NULL;
3722b82f 1517 memset (&table->stab_info, 0, sizeof (table->stab_info));
73722af0 1518 memset (&table->eh_info, 0, sizeof (table->eh_info));
1ae00f9d 1519 table->dynlocal = NULL;
73722af0 1520 table->runpath = NULL;
e1918d23
AM		 1521 table->tls_sec = NULL;
1522 table->tls_size = 0;
73722af0
AM		 1523 table->loaded = NULL;
1524
1525 ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc);
8ea2e4bd
NC		 1526 table->root.type = bfd_link_elf_hash_table;
1527
1528 return ret;
252b5132
RH		 1529}
1530
1531/* Create an ELF linker hash table. */
1532
1533struct bfd_link_hash_table *
217aa764 1534_bfd_elf_link_hash_table_create (bfd *abfd)
252b5132
RH		 1535{
1536 struct elf_link_hash_table *ret;
dc810e39 1537 bfd_size_type amt = sizeof (struct elf_link_hash_table);
252b5132 1538
217aa764
AM		 1539 ret = bfd_malloc (amt);
1540 if (ret == NULL)
252b5132
RH		 1541 return NULL;
1542
1543 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
1544 {
e2d34d7d 1545 free (ret);
252b5132
RH		 1546 return NULL;
1547 }
1548
1549 return &ret->root;
1550}
1551
1552/* This is a hook for the ELF emulation code in the generic linker to
1553 tell the backend linker what file name to use for the DT_NEEDED
4a43e768 1554 entry for a dynamic object. */
252b5132
RH		 1555
1556void
217aa764 1557bfd_elf_set_dt_needed_name (bfd *abfd, const char *name)
252b5132
RH		 1558{
1559 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1560 && bfd_get_format (abfd) == bfd_object)
1561 elf_dt_name (abfd) = name;
1562}
1563
e56f61be
L		 1564int
1565bfd_elf_get_dyn_lib_class (bfd *abfd)
1566{
1567 int lib_class;
1568 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1569 && bfd_get_format (abfd) == bfd_object)
1570 lib_class = elf_dyn_lib_class (abfd);
1571 else
1572 lib_class = 0;
1573 return lib_class;
1574}
1575
74816898 1576void
4a43e768 1577bfd_elf_set_dyn_lib_class (bfd *abfd, int lib_class)
74816898
L		 1578{
1579 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1580 && bfd_get_format (abfd) == bfd_object)
4a43e768 1581 elf_dyn_lib_class (abfd) = lib_class;
74816898
L		 1582}
1583
252b5132
RH		 1584/* Get the list of DT_NEEDED entries for a link. This is a hook for
1585 the linker ELF emulation code. */
1586
1587struct bfd_link_needed_list *
217aa764
AM		 1588bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED,
1589 struct bfd_link_info *info)
252b5132 1590{
0eddce27 1591 if (! is_elf_hash_table (info->hash))
252b5132
RH		 1592 return NULL;
1593 return elf_hash_table (info)->needed;
1594}
1595
a963dc6a
L		 1596/* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1597 hook for the linker ELF emulation code. */
1598
1599struct bfd_link_needed_list *
217aa764
AM		 1600bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED,
1601 struct bfd_link_info *info)
a963dc6a 1602{
0eddce27 1603 if (! is_elf_hash_table (info->hash))
a963dc6a
L		 1604 return NULL;
1605 return elf_hash_table (info)->runpath;
1606}
1607
252b5132
RH		 1608/* Get the name actually used for a dynamic object for a link. This
1609 is the SONAME entry if there is one. Otherwise, it is the string
1610 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1611
1612const char *
217aa764 1613bfd_elf_get_dt_soname (bfd *abfd)
252b5132
RH		 1614{
1615 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1616 && bfd_get_format (abfd) == bfd_object)
1617 return elf_dt_name (abfd);
1618 return NULL;
1619}
1620
1621/* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1622 the ELF linker emulation code. */
1623
b34976b6 1624bfd_boolean
217aa764
AM		 1625bfd_elf_get_bfd_needed_list (bfd *abfd,
1626 struct bfd_link_needed_list **pneeded)
252b5132
RH		 1627{
1628 asection *s;
1629 bfd_byte *dynbuf = NULL;
1630 int elfsec;
dc810e39 1631 unsigned long shlink;
252b5132
RH		 1632 bfd_byte *extdyn, *extdynend;
1633 size_t extdynsize;
217aa764 1634 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
252b5132
RH		 1635
1636 *pneeded = NULL;
1637
1638 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1639 || bfd_get_format (abfd) != bfd_object)
b34976b6 1640 return TRUE;
252b5132
RH		 1641
1642 s = bfd_get_section_by_name (abfd, ".dynamic");
eea6121a 1643 if (s == NULL || s->size == 0)
b34976b6 1644 return TRUE;
252b5132 1645
eea6121a 1646 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
252b5132
RH		 1647 goto error_return;
1648
1649 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1650 if (elfsec == -1)
1651 goto error_return;
1652
dc810e39 1653 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
252b5132
RH		 1654
1655 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1656 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1657
1658 extdyn = dynbuf;
eea6121a 1659 extdynend = extdyn + s->size;
252b5132
RH		 1660 for (; extdyn < extdynend; extdyn += extdynsize)
1661 {
1662 Elf_Internal_Dyn dyn;
1663
217aa764 1664 (*swap_dyn_in) (abfd, extdyn, &dyn);
252b5132
RH		 1665
1666 if (dyn.d_tag == DT_NULL)
1667 break;
1668
1669 if (dyn.d_tag == DT_NEEDED)
1670 {
1671 const char *string;
1672 struct bfd_link_needed_list *l;
dc810e39
AM		 1673 unsigned int tagv = dyn.d_un.d_val;
1674 bfd_size_type amt;
252b5132 1675
dc810e39 1676 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
252b5132
RH		 1677 if (string == NULL)
1678 goto error_return;
1679
dc810e39 1680 amt = sizeof *l;
217aa764 1681 l = bfd_alloc (abfd, amt);
252b5132
RH		 1682 if (l == NULL)
1683 goto error_return;
1684
1685 l->by = abfd;
1686 l->name = string;
1687 l->next = *pneeded;
1688 *pneeded = l;
1689 }
1690 }
1691
1692 free (dynbuf);
1693
b34976b6 1694 return TRUE;
252b5132
RH		 1695
1696 error_return:
1697 if (dynbuf != NULL)
1698 free (dynbuf);
b34976b6 1699 return FALSE;
252b5132
RH		 1700}
1701\f
1702/* Allocate an ELF string table--force the first byte to be zero. */
1703
1704struct bfd_strtab_hash *
217aa764 1705_bfd_elf_stringtab_init (void)
252b5132
RH		 1706{
1707 struct bfd_strtab_hash *ret;
1708
1709 ret = _bfd_stringtab_init ();
1710 if (ret != NULL)
1711 {
1712 bfd_size_type loc;
1713
b34976b6 1714 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
252b5132
RH		 1715 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1716 if (loc == (bfd_size_type) -1)
1717 {
1718 _bfd_stringtab_free (ret);
1719 ret = NULL;
1720 }
1721 }
1722 return ret;
1723}
1724\f
1725/* ELF .o/exec file reading */
1726
c044fabd 1727/* Create a new bfd section from an ELF section header. */
252b5132 1728
b34976b6 1729bfd_boolean
217aa764 1730bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
252b5132
RH		 1731{
1732 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1733 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
9c5bfbb7 1734 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
90937f86 1735 const char *name;
252b5132
RH		 1736
1737 name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
1738
1739 switch (hdr->sh_type)
1740 {
1741 case SHT_NULL:
1742 /* Inactive section. Throw it away. */
b34976b6 1743 return TRUE;
252b5132
RH		 1744
1745 case SHT_PROGBITS: /* Normal section with contents. */
252b5132
RH		 1746 case SHT_NOBITS: /* .bss section. */
1747 case SHT_HASH: /* .hash section. */
1748 case SHT_NOTE: /* .note section. */
25e27870
L		 1749 case SHT_INIT_ARRAY: /* .init_array section. */
1750 case SHT_FINI_ARRAY: /* .fini_array section. */
1751 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
252b5132
RH		 1752 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1753
797fc050
AM		 1754 case SHT_DYNAMIC: /* Dynamic linking information. */
1755 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
b34976b6 1756 return FALSE;
797fc050
AM		 1757 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1758 {
1759 Elf_Internal_Shdr *dynsymhdr;
1760
1761 /* The shared libraries distributed with hpux11 have a bogus
1762 sh_link field for the ".dynamic" section. Find the
1763 string table for the ".dynsym" section instead. */
1764 if (elf_dynsymtab (abfd) != 0)
1765 {
1766 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1767 hdr->sh_link = dynsymhdr->sh_link;
1768 }
1769 else
1770 {
1771 unsigned int i, num_sec;
1772
1773 num_sec = elf_numsections (abfd);
1774 for (i = 1; i < num_sec; i++)
1775 {
1776 dynsymhdr = elf_elfsections (abfd)[i];
1777 if (dynsymhdr->sh_type == SHT_DYNSYM)
1778 {
1779 hdr->sh_link = dynsymhdr->sh_link;
1780 break;
1781 }
1782 }
1783 }
1784 }
1785 break;
1786
252b5132
RH		 1787 case SHT_SYMTAB: /* A symbol table */
1788 if (elf_onesymtab (abfd) == shindex)
b34976b6 1789 return TRUE;
252b5132
RH		 1790
1791 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1792 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1793 elf_onesymtab (abfd) = shindex;
1794 elf_tdata (abfd)->symtab_hdr = *hdr;
1795 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1796 abfd->flags |= HAS_SYMS;
1797
1798 /* Sometimes a shared object will map in the symbol table. If
1799 SHF_ALLOC is set, and this is a shared object, then we also
1800 treat this section as a BFD section. We can not base the
1801 decision purely on SHF_ALLOC, because that flag is sometimes
1049f94e 1802 set in a relocatable object file, which would confuse the
252b5132
RH		 1803 linker. */
1804 if ((hdr->sh_flags & SHF_ALLOC) != 0
1805 && (abfd->flags & DYNAMIC) != 0
1806 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
b34976b6 1807 return FALSE;
252b5132 1808
b34976b6 1809 return TRUE;
252b5132
RH		 1810
1811 case SHT_DYNSYM: /* A dynamic symbol table */
1812 if (elf_dynsymtab (abfd) == shindex)
b34976b6 1813 return TRUE;
252b5132
RH		 1814
1815 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1816 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1817 elf_dynsymtab (abfd) = shindex;
1818 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1819 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1820 abfd->flags |= HAS_SYMS;
1821
1822 /* Besides being a symbol table, we also treat this as a regular
1823 section, so that objcopy can handle it. */
1824 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1825
9ad5cbcf
AM		 1826 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1827 if (elf_symtab_shndx (abfd) == shindex)
b34976b6 1828 return TRUE;
9ad5cbcf
AM		 1829
1830 /* Get the associated symbol table. */
1831 if (! bfd_section_from_shdr (abfd, hdr->sh_link)
1832 || hdr->sh_link != elf_onesymtab (abfd))
b34976b6 1833 return FALSE;
9ad5cbcf
AM		 1834
1835 elf_symtab_shndx (abfd) = shindex;
1836 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1837 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
b34976b6 1838 return TRUE;
9ad5cbcf 1839
252b5132
RH		 1840 case SHT_STRTAB: /* A string table */
1841 if (hdr->bfd_section != NULL)
b34976b6 1842 return TRUE;
252b5132
RH		 1843 if (ehdr->e_shstrndx == shindex)
1844 {
1845 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1846 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
b34976b6 1847 return TRUE;
252b5132
RH		 1848 }
1849 {
9ad5cbcf 1850 unsigned int i, num_sec;
252b5132 1851
9ad5cbcf
AM		 1852 num_sec = elf_numsections (abfd);
1853 for (i = 1; i < num_sec; i++)
252b5132
RH		 1854 {
1855 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1856 if (hdr2->sh_link == shindex)
1857 {
1858 if (! bfd_section_from_shdr (abfd, i))
b34976b6 1859 return FALSE;
252b5132
RH		 1860 if (elf_onesymtab (abfd) == i)
1861 {
1862 elf_tdata (abfd)->strtab_hdr = *hdr;
1863 elf_elfsections (abfd)[shindex] =
1864 &elf_tdata (abfd)->strtab_hdr;
b34976b6 1865 return TRUE;
252b5132
RH		 1866 }
1867 if (elf_dynsymtab (abfd) == i)
1868 {
1869 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1870 elf_elfsections (abfd)[shindex] = hdr =
1871 &elf_tdata (abfd)->dynstrtab_hdr;
1872 /* We also treat this as a regular section, so
1873 that objcopy can handle it. */
1874 break;
1875 }
1876#if 0 /* Not handling other string tables specially right now. */
1877 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
1878 /* We have a strtab for some random other section. */
1879 newsect = (asection *) hdr2->bfd_section;
1880 if (!newsect)
1881 break;
1882 hdr->bfd_section = newsect;
1883 hdr2 = &elf_section_data (newsect)->str_hdr;
1884 *hdr2 = *hdr;
1885 elf_elfsections (abfd)[shindex] = hdr2;
1886#endif
1887 }
1888 }
1889 }
1890
1891 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1892
1893 case SHT_REL:
1894 case SHT_RELA:
1895 /* *These* do a lot of work -- but build no sections! */
1896 {
1897 asection *target_sect;
1898 Elf_Internal_Shdr *hdr2;
9ad5cbcf 1899 unsigned int num_sec = elf_numsections (abfd);
252b5132 1900
03ae5f59 1901 /* Check for a bogus link to avoid crashing. */
9ad5cbcf
AM		 1902 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1903 || hdr->sh_link >= num_sec)
03ae5f59
ILT		 1904 {
1905 ((*_bfd_error_handler)
d003868e
AM		 1906 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1907 abfd, hdr->sh_link, name, shindex));
03ae5f59
ILT		 1908 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1909 }
1910
252b5132
RH		 1911 /* For some incomprehensible reason Oracle distributes
1912 libraries for Solaris in which some of the objects have
1913 bogus sh_link fields. It would be nice if we could just
1914 reject them, but, unfortunately, some people need to use
1915 them. We scan through the section headers; if we find only
1916 one suitable symbol table, we clobber the sh_link to point
1917 to it. I hope this doesn't break anything. */
1918 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1919 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1920 {
9ad5cbcf 1921 unsigned int scan;
252b5132
RH		 1922 int found;
1923
1924 found = 0;
9ad5cbcf 1925 for (scan = 1; scan < num_sec; scan++)
252b5132
RH		 1926 {
1927 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1928 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1929 {
1930 if (found != 0)
1931 {
1932 found = 0;
1933 break;
1934 }
1935 found = scan;
1936 }
1937 }
1938 if (found != 0)
1939 hdr->sh_link = found;
1940 }
1941
1942 /* Get the symbol table. */
1943 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1944 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
b34976b6 1945 return FALSE;
252b5132
RH		 1946
1947 /* If this reloc section does not use the main symbol table we
1948 don't treat it as a reloc section. BFD can't adequately
1949 represent such a section, so at least for now, we don't
c044fabd 1950 try. We just present it as a normal section. We also
60bcf0fa 1951 can't use it as a reloc section if it points to the null
c044fabd 1952 section. */
60bcf0fa 1953 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF)
252b5132
RH		 1954 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1955
1956 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
b34976b6 1957 return FALSE;
252b5132
RH		 1958 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1959 if (target_sect == NULL)
b34976b6 1960 return FALSE;
252b5132
RH		 1961
1962 if ((target_sect->flags & SEC_RELOC) == 0
1963 || target_sect->reloc_count == 0)
1964 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1965 else
1966 {
dc810e39 1967 bfd_size_type amt;
252b5132 1968 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
dc810e39 1969 amt = sizeof (*hdr2);
217aa764 1970 hdr2 = bfd_alloc (abfd, amt);
252b5132
RH		 1971 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1972 }
1973 *hdr2 = *hdr;
1974 elf_elfsections (abfd)[shindex] = hdr2;
d9bc7a44 1975 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
252b5132
RH		 1976 target_sect->flags |= SEC_RELOC;
1977 target_sect->relocation = NULL;
1978 target_sect->rel_filepos = hdr->sh_offset;
bf572ba0
MM		 1979 /* In the section to which the relocations apply, mark whether
1980 its relocations are of the REL or RELA variety. */
72730e0c 1981 if (hdr->sh_size != 0)
68bfbfcc 1982 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
252b5132 1983 abfd->flags |= HAS_RELOC;
b34976b6 1984 return TRUE;
252b5132
RH		 1985 }
1986 break;
1987
1988 case SHT_GNU_verdef:
1989 elf_dynverdef (abfd) = shindex;
1990 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1991 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1992 break;
1993
1994 case SHT_GNU_versym:
1995 elf_dynversym (abfd) = shindex;
1996 elf_tdata (abfd)->dynversym_hdr = *hdr;
1997 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1998 break;
1999
2000 case SHT_GNU_verneed:
2001 elf_dynverref (abfd) = shindex;
2002 elf_tdata (abfd)->dynverref_hdr = *hdr;
2003 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
2004 break;
2005
2006 case SHT_SHLIB:
b34976b6 2007 return TRUE;
252b5132 2008
dbb410c3 2009 case SHT_GROUP:
b885599b
AM		 2010 /* We need a BFD section for objcopy and relocatable linking,
2011 and it's handy to have the signature available as the section
2012 name. */
2013 name = group_signature (abfd, hdr);
2014 if (name == NULL)
b34976b6 2015 return FALSE;
dbb410c3 2016 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name))
b34976b6 2017 return FALSE;
dbb410c3
AM		 2018 if (hdr->contents != NULL)
2019 {
2020 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
2021 unsigned int n_elt = hdr->sh_size / 4;
2022 asection *s;
2023
b885599b
AM		 2024 if (idx->flags & GRP_COMDAT)
2025 hdr->bfd_section->flags
2026 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
2027
45c5e9ed
L		 2028 /* We try to keep the same section order as it comes in. */
2029 idx += n_elt;
dbb410c3 2030 while (--n_elt != 0)
45c5e9ed 2031 if ((s = (--idx)->shdr->bfd_section) != NULL
945906ff 2032 && elf_next_in_group (s) != NULL)
dbb410c3 2033 {
945906ff 2034 elf_next_in_group (hdr->bfd_section) = s;
dbb410c3
AM		 2035 break;
2036 }
2037 }
2038 break;
2039
252b5132
RH		 2040 default:
2041 /* Check for any processor-specific section types. */
2042 {
2043 if (bed->elf_backend_section_from_shdr)
2044 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
2045 }
2046 break;
2047 }
2048
b34976b6 2049 return TRUE;
252b5132
RH		 2050}
2051
ec338859
AM		 2052/* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2053 Return SEC for sections that have no elf section, and NULL on error. */
2054
2055asection *
217aa764
AM		 2056bfd_section_from_r_symndx (bfd *abfd,
2057 struct sym_sec_cache *cache,
2058 asection *sec,
2059 unsigned long r_symndx)
ec338859 2060{
ec338859 2061 Elf_Internal_Shdr *symtab_hdr;
6cdc0ccc
AM		 2062 unsigned char esym[sizeof (Elf64_External_Sym)];
2063 Elf_External_Sym_Shndx eshndx;
2064 Elf_Internal_Sym isym;
ec338859
AM		 2065 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2066
2067 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
2068 return cache->sec[ent];
2069
2070 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6cdc0ccc
AM		 2071 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2072 &isym, esym, &eshndx) == NULL)
ec338859 2073 return NULL;
9ad5cbcf 2074
ec338859
AM		 2075 if (cache->abfd != abfd)
2076 {
2077 memset (cache->indx, -1, sizeof (cache->indx));
2078 cache->abfd = abfd;
2079 }
2080 cache->indx[ent] = r_symndx;
2081 cache->sec[ent] = sec;
50bc7936
AM		 2082 if ((isym.st_shndx != SHN_UNDEF && isym.st_shndx < SHN_LORESERVE)
2083 || isym.st_shndx > SHN_HIRESERVE)
ec338859
AM		 2084 {
2085 asection *s;
6cdc0ccc 2086 s = bfd_section_from_elf_index (abfd, isym.st_shndx);
ec338859
AM		 2087 if (s != NULL)
2088 cache->sec[ent] = s;
2089 }
2090 return cache->sec[ent];
2091}
2092
252b5132
RH		 2093/* Given an ELF section number, retrieve the corresponding BFD
2094 section. */
2095
2096asection *
217aa764 2097bfd_section_from_elf_index (bfd *abfd, unsigned int index)
252b5132 2098{
9ad5cbcf 2099 if (index >= elf_numsections (abfd))
252b5132
RH		 2100 return NULL;
2101 return elf_elfsections (abfd)[index]->bfd_section;
2102}
2103
2f89ff8d
L		 2104static struct bfd_elf_special_section const special_sections[] =
2105{
7dcb9820 2106 { ".bss", 4, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
6723a9f4 2107 { ".gnu.linkonce.b",15, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
7dcb9820
AM		 2108 { ".comment", 8, 0, SHT_PROGBITS, 0 },
2109 { ".data", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2110 { ".data1", 6, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2111 { ".debug", 6, 0, SHT_PROGBITS, 0 },
2112 { ".fini", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2113 { ".init", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2114 { ".line", 5, 0, SHT_PROGBITS, 0 },
2115 { ".rodata", 7, -2, SHT_PROGBITS, SHF_ALLOC },
2116 { ".rodata1", 8, 0, SHT_PROGBITS, SHF_ALLOC },
2117 { ".tbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2118 { ".tdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2119 { ".text", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2120 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2121 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2122 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2123 { ".debug_line", 11, 0, SHT_PROGBITS, 0 },
2124 { ".debug_info", 11, 0, SHT_PROGBITS, 0 },
2125 { ".debug_abbrev", 13, 0, SHT_PROGBITS, 0 },
2126 { ".debug_aranges", 14, 0, SHT_PROGBITS, 0 },
2127 { ".dynamic", 8, 0, SHT_DYNAMIC, SHF_ALLOC },
2128 { ".dynstr", 7, 0, SHT_STRTAB, SHF_ALLOC },
2129 { ".dynsym", 7, 0, SHT_DYNSYM, SHF_ALLOC },
2130 { ".got", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2131 { ".hash", 5, 0, SHT_HASH, SHF_ALLOC },
2132 { ".interp", 7, 0, SHT_PROGBITS, 0 },
2133 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2134 { ".shstrtab", 9, 0, SHT_STRTAB, 0 },
2135 { ".strtab", 7, 0, SHT_STRTAB, 0 },
2136 { ".symtab", 7, 0, SHT_SYMTAB, 0 },
2137 { ".gnu.version", 12, 0, SHT_GNU_versym, 0 },
2138 { ".gnu.version_d", 14, 0, SHT_GNU_verdef, 0 },
2139 { ".gnu.version_r", 14, 0, SHT_GNU_verneed, 0 },
45c5e9ed 2140 { ".note.GNU-stack",15, 0, SHT_PROGBITS, 0 },
7dcb9820
AM		 2141 { ".note", 5, -1, SHT_NOTE, 0 },
2142 { ".rela", 5, -1, SHT_RELA, 0 },
2143 { ".rel", 4, -1, SHT_REL, 0 },
2144 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2145 { NULL, 0, 0, 0, 0 }
2f89ff8d
L		 2146};
2147
2148static const struct bfd_elf_special_section *
2149get_special_section (const char *name,
2150 const struct bfd_elf_special_section *special_sections,
2151 unsigned int rela)
2152{
2153 int i;
7dcb9820 2154 int len = strlen (name);
2f89ff8d
L		 2155
2156 for (i = 0; special_sections[i].prefix != NULL; i++)
7dcb9820
AM		 2157 {
2158 int suffix_len;
2159 int prefix_len = special_sections[i].prefix_length;
2160
2161 if (len < prefix_len)
2162 continue;
2163 if (memcmp (name, special_sections[i].prefix, prefix_len) != 0)
2164 continue;
2165
2166 suffix_len = special_sections[i].suffix_length;
2167 if (suffix_len <= 0)
2168 {
2169 if (name[prefix_len] != 0)
2170 {
2171 if (suffix_len == 0)
2172 continue;
2173 if (name[prefix_len] != '.'
2174 && (suffix_len == -2
2175 || (rela && special_sections[i].type == SHT_REL)))
2176 continue;
2177 }
2178 }
2179 else
2180 {
2181 if (len < prefix_len + suffix_len)
2182 continue;
2183 if (memcmp (name + len - suffix_len,
2184 special_sections[i].prefix + prefix_len,
2185 suffix_len) != 0)
2186 continue;
2187 }
2f89ff8d 2188 return &special_sections[i];
7dcb9820 2189 }
2f89ff8d
L		 2190
2191 return NULL;
2192}
2193
7dcb9820
AM		 2194const struct bfd_elf_special_section *
2195_bfd_elf_get_sec_type_attr (bfd *abfd, const char *name)
2f89ff8d 2196{
9c5bfbb7 2197 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7dcb9820 2198 const struct bfd_elf_special_section *ssect = NULL;
2f89ff8d
L		 2199
2200 /* See if this is one of the special sections. */
2201 if (name)
2202 {
9c5bfbb7 2203 unsigned int rela = bed->default_use_rela_p;
2f89ff8d
L		 2204
2205 if (bed->special_sections)
2206 ssect = get_special_section (name, bed->special_sections, rela);
2207
2208 if (! ssect)
2209 ssect = get_special_section (name, special_sections, rela);
2f89ff8d
L		 2210 }
2211
7dcb9820 2212 return ssect;
2f89ff8d
L		 2213}
2214
b34976b6 2215bfd_boolean
217aa764 2216_bfd_elf_new_section_hook (bfd *abfd, asection *sec)
252b5132
RH		 2217{
2218 struct bfd_elf_section_data *sdata;
7dcb9820 2219 const struct bfd_elf_special_section *ssect;
252b5132 2220
f0abc2a1
AM		 2221 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2222 if (sdata == NULL)
2223 {
217aa764 2224 sdata = bfd_zalloc (abfd, sizeof (*sdata));
f0abc2a1
AM		 2225 if (sdata == NULL)
2226 return FALSE;
217aa764 2227 sec->used_by_bfd = sdata;
f0abc2a1 2228 }
bf572ba0 2229
3cddba1e 2230 elf_section_type (sec) = SHT_NULL;
7dcb9820
AM		 2231 ssect = _bfd_elf_get_sec_type_attr (abfd, sec->name);
2232 if (ssect != NULL)
2f89ff8d 2233 {
7dcb9820
AM		 2234 elf_section_type (sec) = ssect->type;
2235 elf_section_flags (sec) = ssect->attr;
2f89ff8d
L		 2236 }
2237
bf572ba0 2238 /* Indicate whether or not this section should use RELA relocations. */
68bfbfcc 2239 sec->use_rela_p = get_elf_backend_data (abfd)->default_use_rela_p;
bf572ba0 2240
b34976b6 2241 return TRUE;
252b5132
RH		 2242}
2243
2244/* Create a new bfd section from an ELF program header.
2245
2246 Since program segments have no names, we generate a synthetic name
2247 of the form segment<NUM>, where NUM is generally the index in the
2248 program header table. For segments that are split (see below) we
2249 generate the names segment<NUM>a and segment<NUM>b.
2250
2251 Note that some program segments may have a file size that is different than
2252 (less than) the memory size. All this means is that at execution the
2253 system must allocate the amount of memory specified by the memory size,
2254 but only initialize it with the first "file size" bytes read from the
2255 file. This would occur for example, with program segments consisting
2256 of combined data+bss.
2257
2258 To handle the above situation, this routine generates TWO bfd sections
2259 for the single program segment. The first has the length specified by
2260 the file size of the segment, and the second has the length specified
2261 by the difference between the two sizes. In effect, the segment is split
2262 into it's initialized and uninitialized parts.
2263
2264 */
2265
b34976b6 2266bfd_boolean
217aa764
AM		 2267_bfd_elf_make_section_from_phdr (bfd *abfd,
2268 Elf_Internal_Phdr *hdr,
2269 int index,
2270 const char *typename)
252b5132
RH		 2271{
2272 asection *newsect;
2273 char *name;
2274 char namebuf[64];
d4c88bbb 2275 size_t len;
252b5132
RH		 2276 int split;
2277
2278 split = ((hdr->p_memsz > 0)
2279 && (hdr->p_filesz > 0)
2280 && (hdr->p_memsz > hdr->p_filesz));
27ac83bf 2281 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
d4c88bbb 2282 len = strlen (namebuf) + 1;
217aa764 2283 name = bfd_alloc (abfd, len);
252b5132 2284 if (!name)
b34976b6 2285 return FALSE;
d4c88bbb 2286 memcpy (name, namebuf, len);
252b5132
RH		 2287 newsect = bfd_make_section (abfd, name);
2288 if (newsect == NULL)
b34976b6 2289 return FALSE;
252b5132
RH		 2290 newsect->vma = hdr->p_vaddr;
2291 newsect->lma = hdr->p_paddr;
eea6121a 2292 newsect->size = hdr->p_filesz;
252b5132
RH		 2293 newsect->filepos = hdr->p_offset;
2294 newsect->flags |= SEC_HAS_CONTENTS;
57e24cbf 2295 newsect->alignment_power = bfd_log2 (hdr->p_align);
252b5132
RH		 2296 if (hdr->p_type == PT_LOAD)
2297 {
2298 newsect->flags |= SEC_ALLOC;
2299 newsect->flags |= SEC_LOAD;
2300 if (hdr->p_flags & PF_X)
2301 {
2302 /* FIXME: all we known is that it has execute PERMISSION,
c044fabd 2303 may be data. */
252b5132
RH		 2304 newsect->flags |= SEC_CODE;
2305 }
2306 }
2307 if (!(hdr->p_flags & PF_W))
2308 {
2309 newsect->flags |= SEC_READONLY;
2310 }
2311
2312 if (split)
2313 {
27ac83bf 2314 sprintf (namebuf, "%s%db", typename, index);
d4c88bbb 2315 len = strlen (namebuf) + 1;
217aa764 2316 name = bfd_alloc (abfd, len);
252b5132 2317 if (!name)
b34976b6 2318 return FALSE;
d4c88bbb 2319 memcpy (name, namebuf, len);
252b5132
RH		 2320 newsect = bfd_make_section (abfd, name);
2321 if (newsect == NULL)
b34976b6 2322 return FALSE;
252b5132
RH		 2323 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2324 newsect->lma = hdr->p_paddr + hdr->p_filesz;
eea6121a 2325 newsect->size = hdr->p_memsz - hdr->p_filesz;
252b5132
RH		 2326 if (hdr->p_type == PT_LOAD)
2327 {
2328 newsect->flags |= SEC_ALLOC;
2329 if (hdr->p_flags & PF_X)
2330 newsect->flags |= SEC_CODE;
2331 }
2332 if (!(hdr->p_flags & PF_W))
2333 newsect->flags |= SEC_READONLY;
2334 }
2335
b34976b6 2336 return TRUE;
252b5132
RH		 2337}
2338
b34976b6 2339bfd_boolean
217aa764 2340bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
20cfcaae 2341{
9c5bfbb7 2342 const struct elf_backend_data *bed;
20cfcaae
NC		 2343
2344 switch (hdr->p_type)
2345 {
2346 case PT_NULL:
2347 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2348
2349 case PT_LOAD:
2350 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2351
2352 case PT_DYNAMIC:
2353 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2354
2355 case PT_INTERP:
2356 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2357
2358 case PT_NOTE:
2359 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
b34976b6 2360 return FALSE;
217aa764 2361 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
b34976b6
AM		 2362 return FALSE;
2363 return TRUE;
20cfcaae
NC		 2364
2365 case PT_SHLIB:
2366 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2367
2368 case PT_PHDR:
2369 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2370
811072d8
RM		 2371 case PT_GNU_EH_FRAME:
2372 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2373 "eh_frame_hdr");
2374
9ee5e499
JJ		 2375 case PT_GNU_STACK:
2376 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2377
8c37241b
JJ		 2378 case PT_GNU_RELRO:
2379 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
2380
20cfcaae
NC		 2381 default:
2382 /* Check for any processor-specific program segment types.
c044fabd 2383 If no handler for them, default to making "segment" sections. */
20cfcaae
NC		 2384 bed = get_elf_backend_data (abfd);
2385 if (bed->elf_backend_section_from_phdr)
2386 return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index);
2387 else
2388 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment");
2389 }
2390}
2391
23bc299b 2392/* Initialize REL_HDR, the section-header for new section, containing
b34976b6 2393 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
23bc299b
MM		 2394 relocations; otherwise, we use REL relocations. */
2395
b34976b6 2396bfd_boolean
217aa764
AM		 2397_bfd_elf_init_reloc_shdr (bfd *abfd,
2398 Elf_Internal_Shdr *rel_hdr,
2399 asection *asect,
2400 bfd_boolean use_rela_p)
23bc299b
MM		 2401{
2402 char *name;
9c5bfbb7 2403 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
dc810e39 2404 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
23bc299b 2405
dc810e39 2406 name = bfd_alloc (abfd, amt);
23bc299b 2407 if (name == NULL)
b34976b6 2408 return FALSE;
23bc299b
MM		 2409 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2410 rel_hdr->sh_name =
2b0f7ef9 2411 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
b34976b6 2412 FALSE);
23bc299b 2413 if (rel_hdr->sh_name == (unsigned int) -1)
b34976b6 2414 return FALSE;
23bc299b
MM		 2415 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2416 rel_hdr->sh_entsize = (use_rela_p
2417 ? bed->s->sizeof_rela
2418 : bed->s->sizeof_rel);
45d6a902 2419 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
23bc299b
MM		 2420 rel_hdr->sh_flags = 0;
2421 rel_hdr->sh_addr = 0;
2422 rel_hdr->sh_size = 0;
2423 rel_hdr->sh_offset = 0;
2424
b34976b6 2425 return TRUE;
23bc299b
MM		 2426}
2427
252b5132
RH		 2428/* Set up an ELF internal section header for a section. */
2429
252b5132 2430static void
217aa764 2431elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
252b5132 2432{
9c5bfbb7 2433 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
217aa764 2434 bfd_boolean *failedptr = failedptrarg;
252b5132
RH		 2435 Elf_Internal_Shdr *this_hdr;
2436
2437 if (*failedptr)
2438 {
2439 /* We already failed; just get out of the bfd_map_over_sections
2440 loop. */
2441 return;
2442 }
2443
2444 this_hdr = &elf_section_data (asect)->this_hdr;
2445
e57b5356
AM		 2446 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2447 asect->name, FALSE);
2448 if (this_hdr->sh_name == (unsigned int) -1)
252b5132 2449 {
b34976b6 2450 *failedptr = TRUE;
252b5132
RH		 2451 return;
2452 }
2453
2454 this_hdr->sh_flags = 0;
2455
2456 if ((asect->flags & SEC_ALLOC) != 0
2457 || asect->user_set_vma)
2458 this_hdr->sh_addr = asect->vma;
2459 else
2460 this_hdr->sh_addr = 0;
2461
2462 this_hdr->sh_offset = 0;
eea6121a 2463 this_hdr->sh_size = asect->size;
252b5132
RH		 2464 this_hdr->sh_link = 0;
2465 this_hdr->sh_addralign = 1 << asect->alignment_power;
2466 /* The sh_entsize and sh_info fields may have been set already by
2467 copy_private_section_data. */
2468
2469 this_hdr->bfd_section = asect;
2470 this_hdr->contents = NULL;
2471
3cddba1e
L		 2472 /* If the section type is unspecified, we set it based on
2473 asect->flags. */
2474 if (this_hdr->sh_type == SHT_NULL)
2475 {
45c5e9ed
L		 2476 if ((asect->flags & SEC_GROUP) != 0)
2477 {
2478 /* We also need to mark SHF_GROUP here for relocatable
2479 link. */
2480 struct bfd_link_order *l;
2481 asection *elt;
2482
2483 for (l = asect->link_order_head; l != NULL; l = l->next)
2484 if (l->type == bfd_indirect_link_order
2485 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2486 do
2487 {
2488 /* The name is not important. Anything will do. */
2489 elf_group_name (elt->output_section) = "G";
2490 elf_section_flags (elt->output_section) |= SHF_GROUP;
2491
2492 elt = elf_next_in_group (elt);
2493 /* During a relocatable link, the lists are
2494 circular. */
2495 }
2496 while (elt != elf_next_in_group (l->u.indirect.section));
2497
2498 this_hdr->sh_type = SHT_GROUP;
2499 }
2500 else if ((asect->flags & SEC_ALLOC) != 0
3cddba1e
L		 2501 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2502 || (asect->flags & SEC_NEVER_LOAD) != 0))
2503 this_hdr->sh_type = SHT_NOBITS;
2504 else
2505 this_hdr->sh_type = SHT_PROGBITS;
2506 }
2507
2f89ff8d 2508 switch (this_hdr->sh_type)
252b5132 2509 {
2f89ff8d 2510 default:
2f89ff8d
L		 2511 break;
2512
2513 case SHT_STRTAB:
2514 case SHT_INIT_ARRAY:
2515 case SHT_FINI_ARRAY:
2516 case SHT_PREINIT_ARRAY:
2517 case SHT_NOTE:
2518 case SHT_NOBITS:
2519 case SHT_PROGBITS:
2520 break;
2521
2522 case SHT_HASH:
c7ac6ff8 2523 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2f89ff8d 2524 break;
5de3bf90 2525
2f89ff8d 2526 case SHT_DYNSYM:
252b5132 2527 this_hdr->sh_entsize = bed->s->sizeof_sym;
2f89ff8d
L		 2528 break;
2529
2530 case SHT_DYNAMIC:
252b5132 2531 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2f89ff8d
L		 2532 break;
2533
2534 case SHT_RELA:
2535 if (get_elf_backend_data (abfd)->may_use_rela_p)
2536 this_hdr->sh_entsize = bed->s->sizeof_rela;
2537 break;
2538
2539 case SHT_REL:
2540 if (get_elf_backend_data (abfd)->may_use_rel_p)
2541 this_hdr->sh_entsize = bed->s->sizeof_rel;
2542 break;
2543
2544 case SHT_GNU_versym:
252b5132 2545 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2f89ff8d
L		 2546 break;
2547
2548 case SHT_GNU_verdef:
252b5132
RH		 2549 this_hdr->sh_entsize = 0;
2550 /* objcopy or strip will copy over sh_info, but may not set
2551 cverdefs. The linker will set cverdefs, but sh_info will be
2552 zero. */
2553 if (this_hdr->sh_info == 0)
2554 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2555 else
2556 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2557 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2f89ff8d
L		 2558 break;
2559
2560 case SHT_GNU_verneed:
252b5132
RH		 2561 this_hdr->sh_entsize = 0;
2562 /* objcopy or strip will copy over sh_info, but may not set
2563 cverrefs. The linker will set cverrefs, but sh_info will be
2564 zero. */
2565 if (this_hdr->sh_info == 0)
2566 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2567 else
2568 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2569 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2f89ff8d
L		 2570 break;
2571
2572 case SHT_GROUP:
dbb410c3 2573 this_hdr->sh_entsize = 4;
2f89ff8d 2574 break;
dbb410c3 2575 }
252b5132
RH		 2576
2577 if ((asect->flags & SEC_ALLOC) != 0)
2578 this_hdr->sh_flags |= SHF_ALLOC;
2579 if ((asect->flags & SEC_READONLY) == 0)
2580 this_hdr->sh_flags |= SHF_WRITE;
2581 if ((asect->flags & SEC_CODE) != 0)
2582 this_hdr->sh_flags |= SHF_EXECINSTR;
f5fa8ca2
JJ		 2583 if ((asect->flags & SEC_MERGE) != 0)
2584 {
2585 this_hdr->sh_flags |= SHF_MERGE;
2586 this_hdr->sh_entsize = asect->entsize;
2587 if ((asect->flags & SEC_STRINGS) != 0)
2588 this_hdr->sh_flags |= SHF_STRINGS;
2589 }
1126897b 2590 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
dbb410c3 2591 this_hdr->sh_flags |= SHF_GROUP;
13ae64f3 2592 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
704afa60
JJ		 2593 {
2594 this_hdr->sh_flags |= SHF_TLS;
eea6121a 2595 if (asect->size == 0 && (asect->flags & SEC_HAS_CONTENTS) == 0)
704afa60
JJ		 2596 {
2597 struct bfd_link_order *o;
b34976b6 2598
704afa60
JJ		 2599 this_hdr->sh_size = 0;
2600 for (o = asect->link_order_head; o != NULL; o = o->next)
2601 if (this_hdr->sh_size < o->offset + o->size)
2602 this_hdr->sh_size = o->offset + o->size;
2603 if (this_hdr->sh_size)
2604 this_hdr->sh_type = SHT_NOBITS;
2605 }
2606 }
252b5132
RH		 2607
2608 /* Check for processor-specific section types. */
e1fddb6b
AO		 2609 if (bed->elf_backend_fake_sections
2610 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
b34976b6 2611 *failedptr = TRUE;
252b5132
RH		 2612
2613 /* If the section has relocs, set up a section header for the
23bc299b
MM		 2614 SHT_REL[A] section. If two relocation sections are required for
2615 this section, it is up to the processor-specific back-end to
c044fabd 2616 create the other. */
23bc299b 2617 if ((asect->flags & SEC_RELOC) != 0
c044fabd 2618 && !_bfd_elf_init_reloc_shdr (abfd,
23bc299b 2619 &elf_section_data (asect)->rel_hdr,
c044fabd 2620 asect,
68bfbfcc 2621 asect->use_rela_p))
b34976b6 2622 *failedptr = TRUE;
252b5132
RH		 2623}
2624
dbb410c3
AM		 2625/* Fill in the contents of a SHT_GROUP section. */
2626
1126897b 2627void
217aa764 2628bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
dbb410c3 2629{
217aa764 2630 bfd_boolean *failedptr = failedptrarg;
dbb410c3 2631 unsigned long symindx;
9dce4196 2632 asection *elt, *first;
dbb410c3
AM		 2633 unsigned char *loc;
2634 struct bfd_link_order *l;
b34976b6 2635 bfd_boolean gas;
dbb410c3
AM		 2636
2637 if (elf_section_data (sec)->this_hdr.sh_type != SHT_GROUP
2638 || *failedptr)
2639 return;
2640
1126897b
AM		 2641 symindx = 0;
2642 if (elf_group_id (sec) != NULL)
2643 symindx = elf_group_id (sec)->udata.i;
2644
2645 if (symindx == 0)
2646 {
2647 /* If called from the assembler, swap_out_syms will have set up
2648 elf_section_syms; If called for "ld -r", use target_index. */
2649 if (elf_section_syms (abfd) != NULL)
2650 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2651 else
2652 symindx = sec->target_index;
2653 }
dbb410c3
AM		 2654 elf_section_data (sec)->this_hdr.sh_info = symindx;
2655
1126897b 2656 /* The contents won't be allocated for "ld -r" or objcopy. */
b34976b6 2657 gas = TRUE;
dbb410c3
AM		 2658 if (sec->contents == NULL)
2659 {
b34976b6 2660 gas = FALSE;
eea6121a 2661 sec->contents = bfd_alloc (abfd, sec->size);
9dce4196
AM		 2662
2663 /* Arrange for the section to be written out. */
2664 elf_section_data (sec)->this_hdr.contents = sec->contents;
dbb410c3
AM		 2665 if (sec->contents == NULL)
2666 {
b34976b6 2667 *failedptr = TRUE;
dbb410c3
AM		 2668 return;
2669 }
2670 }
2671
eea6121a 2672 loc = sec->contents + sec->size;
dbb410c3 2673
9dce4196
AM		 2674 /* Get the pointer to the first section in the group that gas
2675 squirreled away here. objcopy arranges for this to be set to the
2676 start of the input section group. */
2677 first = elt = elf_next_in_group (sec);
dbb410c3
AM		 2678
2679 /* First element is a flag word. Rest of section is elf section
2680 indices for all the sections of the group. Write them backwards
2681 just to keep the group in the same order as given in .section
2682 directives, not that it matters. */
2683 while (elt != NULL)
2684 {
9dce4196
AM		 2685 asection *s;
2686 unsigned int idx;
2687
dbb410c3 2688 loc -= 4;
9dce4196
AM		 2689 s = elt;
2690 if (!gas)
2691 s = s->output_section;
2692 idx = 0;
2693 if (s != NULL)
2694 idx = elf_section_data (s)->this_idx;
2695 H_PUT_32 (abfd, idx, loc);
945906ff 2696 elt = elf_next_in_group (elt);
9dce4196
AM		 2697 if (elt == first)
2698 break;
dbb410c3
AM		 2699 }
2700
2701 /* If this is a relocatable link, then the above did nothing because
2702 SEC is the output section. Look through the input sections
2703 instead. */
2704 for (l = sec->link_order_head; l != NULL; l = l->next)
2705 if (l->type == bfd_indirect_link_order
945906ff 2706 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
dbb410c3
AM		 2707 do
2708 {
2709 loc -= 4;
2710 H_PUT_32 (abfd,
2711 elf_section_data (elt->output_section)->this_idx, loc);
945906ff 2712 elt = elf_next_in_group (elt);
dbb410c3
AM		 2713 /* During a relocatable link, the lists are circular. */
2714 }
945906ff 2715 while (elt != elf_next_in_group (l->u.indirect.section));
dbb410c3 2716
3d7f7666 2717 if ((loc -= 4) != sec->contents)
9dce4196 2718 abort ();
dbb410c3 2719
9dce4196 2720 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
dbb410c3
AM		 2721}
2722
252b5132
RH		 2723/* Assign all ELF section numbers. The dummy first section is handled here
2724 too. The link/info pointers for the standard section types are filled
2725 in here too, while we're at it. */
2726
b34976b6 2727static bfd_boolean
217aa764 2728assign_section_numbers (bfd *abfd)
252b5132
RH		 2729{
2730 struct elf_obj_tdata *t = elf_tdata (abfd);
2731 asection *sec;
2b0f7ef9 2732 unsigned int section_number, secn;
252b5132 2733 Elf_Internal_Shdr **i_shdrp;
dc810e39 2734 bfd_size_type amt;
252b5132
RH		 2735
2736 section_number = 1;
2737
2b0f7ef9
JJ		 2738 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2739
252b5132
RH		 2740 for (sec = abfd->sections; sec; sec = sec->next)
2741 {
2742 struct bfd_elf_section_data *d = elf_section_data (sec);
2743
9ad5cbcf
AM		 2744 if (section_number == SHN_LORESERVE)
2745 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
252b5132 2746 d->this_idx = section_number++;
2b0f7ef9 2747 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
252b5132
RH		 2748 if ((sec->flags & SEC_RELOC) == 0)
2749 d->rel_idx = 0;
2750 else
2b0f7ef9 2751 {
9ad5cbcf
AM		 2752 if (section_number == SHN_LORESERVE)
2753 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2b0f7ef9
JJ		 2754 d->rel_idx = section_number++;
2755 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2756 }
23bc299b
MM		 2757
2758 if (d->rel_hdr2)
2b0f7ef9 2759 {
9ad5cbcf
AM		 2760 if (section_number == SHN_LORESERVE)
2761 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2b0f7ef9
JJ		 2762 d->rel_idx2 = section_number++;
2763 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2764 }
23bc299b
MM		 2765 else
2766 d->rel_idx2 = 0;
252b5132
RH		 2767 }
2768
9ad5cbcf
AM		 2769 if (section_number == SHN_LORESERVE)
2770 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
252b5132 2771 t->shstrtab_section = section_number++;
2b0f7ef9 2772 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
252b5132 2773 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
252b5132
RH		 2774
2775 if (bfd_get_symcount (abfd) > 0)
2776 {
9ad5cbcf
AM		 2777 if (section_number == SHN_LORESERVE)
2778 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
252b5132 2779 t->symtab_section = section_number++;
2b0f7ef9 2780 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
9ad5cbcf
AM		 2781 if (section_number > SHN_LORESERVE - 2)
2782 {
2783 if (section_number == SHN_LORESERVE)
2784 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2785 t->symtab_shndx_section = section_number++;
2786 t->symtab_shndx_hdr.sh_name
2787 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
b34976b6 2788 ".symtab_shndx", FALSE);
9ad5cbcf 2789 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
b34976b6 2790 return FALSE;
9ad5cbcf
AM		 2791 }
2792 if (section_number == SHN_LORESERVE)
2793 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
252b5132 2794 t->strtab_section = section_number++;
2b0f7ef9 2795 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
252b5132
RH		 2796 }
2797
2b0f7ef9
JJ		 2798 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2799 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
9ad5cbcf
AM		 2800
2801 elf_numsections (abfd) = section_number;
252b5132 2802 elf_elfheader (abfd)->e_shnum = section_number;
9ad5cbcf
AM		 2803 if (section_number > SHN_LORESERVE)
2804 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
252b5132
RH		 2805
2806 /* Set up the list of section header pointers, in agreement with the
2807 indices. */
dc810e39 2808 amt = section_number * sizeof (Elf_Internal_Shdr *);
217aa764 2809 i_shdrp = bfd_zalloc (abfd, amt);
252b5132 2810 if (i_shdrp == NULL)
b34976b6 2811 return FALSE;
252b5132 2812
dc810e39 2813 amt = sizeof (Elf_Internal_Shdr);
217aa764 2814 i_shdrp[0] = bfd_zalloc (abfd, amt);
252b5132
RH		 2815 if (i_shdrp[0] == NULL)
2816 {
2817 bfd_release (abfd, i_shdrp);
b34976b6 2818 return FALSE;
252b5132 2819 }
252b5132
RH		 2820
2821 elf_elfsections (abfd) = i_shdrp;
2822
2823 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2824 if (bfd_get_symcount (abfd) > 0)
2825 {
2826 i_shdrp[t->symtab_section] = &t->symtab_hdr;
9ad5cbcf
AM		 2827 if (elf_numsections (abfd) > SHN_LORESERVE)
2828 {
2829 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2830 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2831 }
252b5132
RH		 2832 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2833 t->symtab_hdr.sh_link = t->strtab_section;
2834 }
38ce5b11 2835
252b5132
RH		 2836 for (sec = abfd->sections; sec; sec = sec->next)
2837 {
2838 struct bfd_elf_section_data *d = elf_section_data (sec);
2839 asection *s;
2840 const char *name;
2841
2842 i_shdrp[d->this_idx] = &d->this_hdr;
2843 if (d->rel_idx != 0)
2844 i_shdrp[d->rel_idx] = &d->rel_hdr;
23bc299b
MM		 2845 if (d->rel_idx2 != 0)
2846 i_shdrp[d->rel_idx2] = d->rel_hdr2;
252b5132
RH		 2847
2848 /* Fill in the sh_link and sh_info fields while we're at it. */
2849
2850 /* sh_link of a reloc section is the section index of the symbol
2851 table. sh_info is the section index of the section to which
2852 the relocation entries apply. */
2853 if (d->rel_idx != 0)
2854 {
2855 d->rel_hdr.sh_link = t->symtab_section;
2856 d->rel_hdr.sh_info = d->this_idx;
2857 }
23bc299b
MM		 2858 if (d->rel_idx2 != 0)
2859 {
2860 d->rel_hdr2->sh_link = t->symtab_section;
2861 d->rel_hdr2->sh_info = d->this_idx;
2862 }
252b5132 2863
38ce5b11
L		 2864 /* We need to set up sh_link for SHF_LINK_ORDER. */
2865 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
2866 {
2867 s = elf_linked_to_section (sec);
2868 if (s)
2869 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2870 else
2871 {
2872 struct bfd_link_order *p;
2873
2874 /* Find out what the corresponding section in output
2875 is. */
2876 for (p = sec->link_order_head; p != NULL; p = p->next)
2877 {
2878 s = p->u.indirect.section;
2879 if (p->type == bfd_indirect_link_order
2880 && (bfd_get_flavour (s->owner)
2881 == bfd_target_elf_flavour))
2882 {
2883 Elf_Internal_Shdr ** const elf_shdrp
2884 = elf_elfsections (s->owner);
2885 int elfsec
2886 = _bfd_elf_section_from_bfd_section (s->owner, s);
2887 elfsec = elf_shdrp[elfsec]->sh_link;
185d09ad
L		 2888 /* PR 290:
2889 The Intel C compiler generates SHT_IA_64_UNWIND with
2890 SHF_LINK_ORDER. But it doesn't set theh sh_link or
2891 sh_info fields. Hence we could get the situation
2892 where elfsec is 0. */
2893 if (elfsec == 0)
2894 {
2895 const struct elf_backend_data *bed
2896 = get_elf_backend_data (abfd);
2897 if (bed->link_order_error_handler)
d003868e
AM		 2898 bed->link_order_error_handler
2899 (_("%B: warning: sh_link not set for section `%S'"),
2900 abfd, s);
185d09ad
L		 2901 }
2902 else
2903 {
2904 s = elf_shdrp[elfsec]->bfd_section->output_section;
2905 BFD_ASSERT (s != NULL);
2906 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2907 }
38ce5b11
L		 2908 break;
2909 }
2910 }
2911 }
2912 }
2913
252b5132
RH		 2914 switch (d->this_hdr.sh_type)
2915 {
2916 case SHT_REL:
2917 case SHT_RELA:
2918 /* A reloc section which we are treating as a normal BFD
2919 section. sh_link is the section index of the symbol
2920 table. sh_info is the section index of the section to
2921 which the relocation entries apply. We assume that an
2922 allocated reloc section uses the dynamic symbol table.
2923 FIXME: How can we be sure? */
2924 s = bfd_get_section_by_name (abfd, ".dynsym");
2925 if (s != NULL)
2926 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2927
2928 /* We look up the section the relocs apply to by name. */
2929 name = sec->name;
2930 if (d->this_hdr.sh_type == SHT_REL)
2931 name += 4;
2932 else
2933 name += 5;
2934 s = bfd_get_section_by_name (abfd, name);
2935 if (s != NULL)
2936 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2937 break;
2938
2939 case SHT_STRTAB:
2940 /* We assume that a section named .stab*str is a stabs
2941 string section. We look for a section with the same name
2942 but without the trailing ``str'', and set its sh_link
2943 field to point to this section. */
2944 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
2945 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2946 {
2947 size_t len;
2948 char *alc;
2949
2950 len = strlen (sec->name);
217aa764 2951 alc = bfd_malloc (len - 2);
252b5132 2952 if (alc == NULL)
b34976b6 2953 return FALSE;
d4c88bbb 2954 memcpy (alc, sec->name, len - 3);
252b5132
RH		 2955 alc[len - 3] = '\0';
2956 s = bfd_get_section_by_name (abfd, alc);
2957 free (alc);
2958 if (s != NULL)
2959 {
2960 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
2961
2962 /* This is a .stab section. */
0594c12d
AM		 2963 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
2964 elf_section_data (s)->this_hdr.sh_entsize
2965 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
252b5132
RH		 2966 }
2967 }
2968 break;
2969
2970 case SHT_DYNAMIC:
2971 case SHT_DYNSYM:
2972 case SHT_GNU_verneed:
2973 case SHT_GNU_verdef:
2974 /* sh_link is the section header index of the string table
2975 used for the dynamic entries, or the symbol table, or the
2976 version strings. */
2977 s = bfd_get_section_by_name (abfd, ".dynstr");
2978 if (s != NULL)
2979 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2980 break;
2981
2982 case SHT_HASH:
2983 case SHT_GNU_versym:
2984 /* sh_link is the section header index of the symbol table
2985 this hash table or version table is for. */
2986 s = bfd_get_section_by_name (abfd, ".dynsym");
2987 if (s != NULL)
2988 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2989 break;
dbb410c3
AM		 2990
2991 case SHT_GROUP:
2992 d->this_hdr.sh_link = t->symtab_section;
252b5132
RH		 2993 }
2994 }
2995
2b0f7ef9 2996 for (secn = 1; secn < section_number; ++secn)
9ad5cbcf
AM		 2997 if (i_shdrp[secn] == NULL)
2998 i_shdrp[secn] = i_shdrp[0];
2999 else
3000 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3001 i_shdrp[secn]->sh_name);
b34976b6 3002 return TRUE;
252b5132
RH		 3003}
3004
3005/* Map symbol from it's internal number to the external number, moving
3006 all local symbols to be at the head of the list. */
3007
268b6b39 3008static int
217aa764 3009sym_is_global (bfd *abfd, asymbol *sym)
252b5132
RH		 3010{
3011 /* If the backend has a special mapping, use it. */
9c5bfbb7 3012 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
217aa764
AM		 3013 if (bed->elf_backend_sym_is_global)
3014 return (*bed->elf_backend_sym_is_global) (abfd, sym);
252b5132
RH		 3015
3016 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3017 || bfd_is_und_section (bfd_get_section (sym))
3018 || bfd_is_com_section (bfd_get_section (sym)));
3019}
3020
b34976b6 3021static bfd_boolean
217aa764 3022elf_map_symbols (bfd *abfd)
252b5132 3023{
dc810e39 3024 unsigned int symcount = bfd_get_symcount (abfd);
252b5132
RH		 3025 asymbol **syms = bfd_get_outsymbols (abfd);
3026 asymbol **sect_syms;
dc810e39
AM		 3027 unsigned int num_locals = 0;
3028 unsigned int num_globals = 0;
3029 unsigned int num_locals2 = 0;
3030 unsigned int num_globals2 = 0;
252b5132 3031 int max_index = 0;
dc810e39 3032 unsigned int idx;
252b5132
RH		 3033 asection *asect;
3034 asymbol **new_syms;
dc810e39 3035 bfd_size_type amt;
252b5132
RH		 3036
3037#ifdef DEBUG
3038 fprintf (stderr, "elf_map_symbols\n");
3039 fflush (stderr);
3040#endif
3041
252b5132
RH		 3042 for (asect = abfd->sections; asect; asect = asect->next)
3043 {
3044 if (max_index < asect->index)
3045 max_index = asect->index;
3046 }
3047
3048 max_index++;
dc810e39 3049 amt = max_index * sizeof (asymbol *);
217aa764 3050 sect_syms = bfd_zalloc (abfd, amt);
252b5132 3051 if (sect_syms == NULL)
b34976b6 3052 return FALSE;
252b5132 3053 elf_section_syms (abfd) = sect_syms;
4e89ac30 3054 elf_num_section_syms (abfd) = max_index;
252b5132 3055
079e9a2f
AM		 3056 /* Init sect_syms entries for any section symbols we have already
3057 decided to output. */
252b5132
RH		 3058 for (idx = 0; idx < symcount; idx++)
3059 {
dc810e39 3060 asymbol *sym = syms[idx];
c044fabd 3061
252b5132
RH		 3062 if ((sym->flags & BSF_SECTION_SYM) != 0
3063 && sym->value == 0)
3064 {
3065 asection *sec;
3066
3067 sec = sym->section;
3068
3069 if (sec->owner != NULL)
3070 {
3071 if (sec->owner != abfd)
3072 {
3073 if (sec->output_offset != 0)
3074 continue;
c044fabd 3075
252b5132
RH		 3076 sec = sec->output_section;
3077
079e9a2f
AM		 3078 /* Empty sections in the input files may have had a
3079 section symbol created for them. (See the comment
3080 near the end of _bfd_generic_link_output_symbols in
3081 linker.c). If the linker script discards such
3082 sections then we will reach this point. Since we know
3083 that we cannot avoid this case, we detect it and skip
3084 the abort and the assignment to the sect_syms array.
3085 To reproduce this particular case try running the
3086 linker testsuite test ld-scripts/weak.exp for an ELF
3087 port that uses the generic linker. */
252b5132
RH		 3088 if (sec->owner == NULL)
3089 continue;
3090
3091 BFD_ASSERT (sec->owner == abfd);
3092 }
3093 sect_syms[sec->index] = syms[idx];
3094 }
3095 }
3096 }
3097
252b5132
RH		 3098 /* Classify all of the symbols. */
3099 for (idx = 0; idx < symcount; idx++)
3100 {
3101 if (!sym_is_global (abfd, syms[idx]))
3102 num_locals++;
3103 else
3104 num_globals++;
3105 }
079e9a2f
AM		 3106
3107 /* We will be adding a section symbol for each BFD section. Most normal
3108 sections will already have a section symbol in outsymbols, but
3109 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3110 at least in that case. */
252b5132
RH		 3111 for (asect = abfd->sections; asect; asect = asect->next)
3112 {
079e9a2f 3113 if (sect_syms[asect->index] == NULL)
252b5132 3114 {
079e9a2f 3115 if (!sym_is_global (abfd, asect->symbol))
252b5132
RH		 3116 num_locals++;
3117 else
3118 num_globals++;
252b5132
RH		 3119 }
3120 }
3121
3122 /* Now sort the symbols so the local symbols are first. */
dc810e39 3123 amt = (num_locals + num_globals) * sizeof (asymbol *);
217aa764 3124 new_syms = bfd_alloc (abfd, amt);
dc810e39 3125
252b5132 3126 if (new_syms == NULL)
b34976b6 3127 return FALSE;
252b5132
RH		 3128
3129 for (idx = 0; idx < symcount; idx++)
3130 {
3131 asymbol *sym = syms[idx];
dc810e39 3132 unsigned int i;
252b5132
RH		 3133
3134 if (!sym_is_global (abfd, sym))
3135 i = num_locals2++;
3136 else
3137 i = num_locals + num_globals2++;
3138 new_syms[i] = sym;
3139 sym->udata.i = i + 1;
3140 }
3141 for (asect = abfd->sections; asect; asect = asect->next)
3142 {
079e9a2f 3143 if (sect_syms[asect->index] == NULL)
252b5132 3144 {
079e9a2f 3145 asymbol *sym = asect->symbol;
dc810e39 3146 unsigned int i;
252b5132 3147
079e9a2f 3148 sect_syms[asect->index] = sym;
252b5132
RH		 3149 if (!sym_is_global (abfd, sym))
3150 i = num_locals2++;
3151 else
3152 i = num_locals + num_globals2++;
3153 new_syms[i] = sym;
3154 sym->udata.i = i + 1;
3155 }
3156 }
3157
3158 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3159
3160 elf_num_locals (abfd) = num_locals;
3161 elf_num_globals (abfd) = num_globals;
b34976b6 3162 return TRUE;
252b5132
RH		 3163}
3164
3165/* Align to the maximum file alignment that could be required for any
3166 ELF data structure. */
3167
268b6b39 3168static inline file_ptr
217aa764 3169align_file_position (file_ptr off, int align)
252b5132
RH		 3170{
3171 return (off + align - 1) & ~(align - 1);
3172}
3173
3174/* Assign a file position to a section, optionally aligning to the
3175 required section alignment. */
3176
217aa764
AM		 3177file_ptr
3178_bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3179 file_ptr offset,
3180 bfd_boolean align)
252b5132
RH		 3181{
3182 if (align)
3183 {
3184 unsigned int al;
3185
3186 al = i_shdrp->sh_addralign;
3187 if (al > 1)
3188 offset = BFD_ALIGN (offset, al);
3189 }
3190 i_shdrp->sh_offset = offset;
3191 if (i_shdrp->bfd_section != NULL)
3192 i_shdrp->bfd_section->filepos = offset;
3193 if (i_shdrp->sh_type != SHT_NOBITS)
3194 offset += i_shdrp->sh_size;
3195 return offset;
3196}
3197
3198/* Compute the file positions we are going to put the sections at, and
3199 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3200 is not NULL, this is being called by the ELF backend linker. */
3201
b34976b6 3202bfd_boolean
217aa764
AM		 3203_bfd_elf_compute_section_file_positions (bfd *abfd,
3204 struct bfd_link_info *link_info)
252b5132 3205{
9c5bfbb7 3206 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
b34976b6 3207 bfd_boolean failed;
252b5132
RH		 3208 struct bfd_strtab_hash *strtab;
3209 Elf_Internal_Shdr *shstrtab_hdr;
3210
3211 if (abfd->output_has_begun)
b34976b6 3212 return TRUE;
252b5132
RH		 3213
3214 /* Do any elf backend specific processing first. */
3215 if (bed->elf_backend_begin_write_processing)
3216 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3217
3218 if (! prep_headers (abfd))
b34976b6 3219 return FALSE;
252b5132 3220
e6c51ed4
NC		 3221 /* Post process the headers if necessary. */
3222 if (bed->elf_backend_post_process_headers)
3223 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3224
b34976b6 3225 failed = FALSE;
252b5132
RH		 3226 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3227 if (failed)
b34976b6 3228 return FALSE;
252b5132
RH		 3229
3230 if (!assign_section_numbers (abfd))
b34976b6 3231 return FALSE;
252b5132
RH		 3232
3233 /* The backend linker builds symbol table information itself. */
3234 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3235 {
3236 /* Non-zero if doing a relocatable link. */
3237 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3238
3239 if (! swap_out_syms (abfd, &strtab, relocatable_p))
b34976b6 3240 return FALSE;
252b5132
RH		 3241 }
3242
1126897b 3243 if (link_info == NULL)
dbb410c3 3244 {
1126897b 3245 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
dbb410c3 3246 if (failed)
b34976b6 3247 return FALSE;
dbb410c3
AM		 3248 }
3249
252b5132
RH		 3250 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3251 /* sh_name was set in prep_headers. */
3252 shstrtab_hdr->sh_type = SHT_STRTAB;
3253 shstrtab_hdr->sh_flags = 0;
3254 shstrtab_hdr->sh_addr = 0;
2b0f7ef9 3255 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
252b5132
RH		 3256 shstrtab_hdr->sh_entsize = 0;
3257 shstrtab_hdr->sh_link = 0;
3258 shstrtab_hdr->sh_info = 0;
3259 /* sh_offset is set in assign_file_positions_except_relocs. */
3260 shstrtab_hdr->sh_addralign = 1;
3261
c84fca4d 3262 if (!assign_file_positions_except_relocs (abfd, link_info))
b34976b6 3263 return FALSE;
252b5132
RH		 3264
3265 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3266 {
3267 file_ptr off;
3268 Elf_Internal_Shdr *hdr;
3269
3270 off = elf_tdata (abfd)->next_file_pos;
3271
3272 hdr = &elf_tdata (abfd)->symtab_hdr;
b34976b6 3273 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
252b5132 3274
9ad5cbcf
AM		 3275 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3276 if (hdr->sh_size != 0)
b34976b6 3277 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
9ad5cbcf 3278
252b5132 3279 hdr = &elf_tdata (abfd)->strtab_hdr;
b34976b6 3280 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
252b5132
RH		 3281
3282 elf_tdata (abfd)->next_file_pos = off;
3283
3284 /* Now that we know where the .strtab section goes, write it
3285 out. */
3286 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3287 || ! _bfd_stringtab_emit (abfd, strtab))
b34976b6 3288 return FALSE;
252b5132
RH		 3289 _bfd_stringtab_free (strtab);
3290 }
3291
b34976b6 3292 abfd->output_has_begun = TRUE;
252b5132 3293
b34976b6 3294 return TRUE;
252b5132
RH		 3295}
3296
3297/* Create a mapping from a set of sections to a program segment. */
3298
217aa764
AM		 3299static struct elf_segment_map *
3300make_mapping (bfd *abfd,
3301 asection **sections,
3302 unsigned int from,
3303 unsigned int to,
3304 bfd_boolean phdr)
252b5132
RH		 3305{
3306 struct elf_segment_map *m;
3307 unsigned int i;
3308 asection **hdrpp;
dc810e39 3309 bfd_size_type amt;
252b5132 3310
dc810e39
AM		 3311 amt = sizeof (struct elf_segment_map);
3312 amt += (to - from - 1) * sizeof (asection *);
217aa764 3313 m = bfd_zalloc (abfd, amt);
252b5132
RH		 3314 if (m == NULL)
3315 return NULL;
3316 m->next = NULL;
3317 m->p_type = PT_LOAD;
3318 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3319 m->sections[i - from] = *hdrpp;
3320 m->count = to - from;
3321
3322 if (from == 0 && phdr)
3323 {
3324 /* Include the headers in the first PT_LOAD segment. */
3325 m->includes_filehdr = 1;
3326 m->includes_phdrs = 1;
3327 }
3328
3329 return m;
3330}
3331
3332/* Set up a mapping from BFD sections to program segments. */
3333
b34976b6 3334static bfd_boolean
217aa764 3335map_sections_to_segments (bfd *abfd)
252b5132
RH		 3336{
3337 asection **sections = NULL;
3338 asection *s;
3339 unsigned int i;
3340 unsigned int count;
3341 struct elf_segment_map *mfirst;
3342 struct elf_segment_map **pm;
3343 struct elf_segment_map *m;
3344 asection *last_hdr;
baaff79e 3345 bfd_vma last_size;
252b5132
RH		 3346 unsigned int phdr_index;
3347 bfd_vma maxpagesize;
3348 asection **hdrpp;
b34976b6
AM		 3349 bfd_boolean phdr_in_segment = TRUE;
3350 bfd_boolean writable;
13ae64f3
JJ		 3351 int tls_count = 0;
3352 asection *first_tls = NULL;
65765700 3353 asection *dynsec, *eh_frame_hdr;
dc810e39 3354 bfd_size_type amt;
252b5132
RH		 3355
3356 if (elf_tdata (abfd)->segment_map != NULL)
b34976b6 3357 return TRUE;
252b5132
RH		 3358
3359 if (bfd_count_sections (abfd) == 0)
b34976b6 3360 return TRUE;
252b5132
RH		 3361
3362 /* Select the allocated sections, and sort them. */
3363
dc810e39 3364 amt = bfd_count_sections (abfd) * sizeof (asection *);
217aa764 3365 sections = bfd_malloc (amt);
252b5132
RH		 3366 if (sections == NULL)
3367 goto error_return;
3368
3369 i = 0;
3370 for (s = abfd->sections; s != NULL; s = s->next)
3371 {
3372 if ((s->flags & SEC_ALLOC) != 0)
3373 {
3374 sections[i] = s;
3375 ++i;
3376 }
3377 }
3378 BFD_ASSERT (i <= bfd_count_sections (abfd));
3379 count = i;
3380
3381 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3382
3383 /* Build the mapping. */
3384
3385 mfirst = NULL;
3386 pm = &mfirst;
3387
3388 /* If we have a .interp section, then create a PT_PHDR segment for
3389 the program headers and a PT_INTERP segment for the .interp
3390 section. */
3391 s = bfd_get_section_by_name (abfd, ".interp");
3392 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3393 {
dc810e39 3394 amt = sizeof (struct elf_segment_map);
217aa764 3395 m = bfd_zalloc (abfd, amt);
252b5132
RH		 3396 if (m == NULL)
3397 goto error_return;
3398 m->next = NULL;
3399 m->p_type = PT_PHDR;
3400 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3401 m->p_flags = PF_R | PF_X;
3402 m->p_flags_valid = 1;
3403 m->includes_phdrs = 1;
3404
3405 *pm = m;
3406 pm = &m->next;
3407
dc810e39 3408 amt = sizeof (struct elf_segment_map);
217aa764 3409 m = bfd_zalloc (abfd, amt);
252b5132
RH		 3410 if (m == NULL)
3411 goto error_return;
3412 m->next = NULL;
3413 m->p_type = PT_INTERP;
3414 m->count = 1;
3415 m->sections[0] = s;
3416
3417 *pm = m;
3418 pm = &m->next;
3419 }
3420
3421 /* Look through the sections. We put sections in the same program
3422 segment when the start of the second section can be placed within
3423 a few bytes of the end of the first section. */
3424 last_hdr = NULL;
baaff79e 3425 last_size = 0;
252b5132
RH		 3426 phdr_index = 0;
3427 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
b34976b6 3428 writable = FALSE;
252b5132
RH		 3429 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3430 if (dynsec != NULL
3431 && (dynsec->flags & SEC_LOAD) == 0)
3432 dynsec = NULL;
3433
3434 /* Deal with -Ttext or something similar such that the first section
3435 is not adjacent to the program headers. This is an
3436 approximation, since at this point we don't know exactly how many
3437 program headers we will need. */
3438 if (count > 0)
3439 {
3440 bfd_size_type phdr_size;
3441
3442 phdr_size = elf_tdata (abfd)->program_header_size;
3443 if (phdr_size == 0)
3444 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3445 if ((abfd->flags & D_PAGED) == 0
3446 || sections[0]->lma < phdr_size
3447 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
b34976b6 3448 phdr_in_segment = FALSE;
252b5132
RH		 3449 }
3450
3451 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3452 {
3453 asection *hdr;
b34976b6 3454 bfd_boolean new_segment;
252b5132
RH		 3455
3456 hdr = *hdrpp;
3457
3458 /* See if this section and the last one will fit in the same
3459 segment. */
3460
3461 if (last_hdr == NULL)
3462 {
3463 /* If we don't have a segment yet, then we don't need a new
3464 one (we build the last one after this loop). */
b34976b6 3465 new_segment = FALSE;
252b5132
RH		 3466 }
3467 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3468 {
3469 /* If this section has a different relation between the
3470 virtual address and the load address, then we need a new
3471 segment. */
b34976b6 3472 new_segment = TRUE;
252b5132 3473 }
baaff79e 3474 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
252b5132
RH		 3475 < BFD_ALIGN (hdr->lma, maxpagesize))
3476 {
3477 /* If putting this section in this segment would force us to
3478 skip a page in the segment, then we need a new segment. */
b34976b6 3479 new_segment = TRUE;
252b5132 3480 }
baaff79e
JJ		 3481 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3482 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
252b5132
RH		 3483 {
3484 /* We don't want to put a loadable section after a
baaff79e
JJ		 3485 nonloadable section in the same segment.
3486 Consider .tbss sections as loadable for this purpose. */
b34976b6 3487 new_segment = TRUE;
252b5132
RH		 3488 }
3489 else if ((abfd->flags & D_PAGED) == 0)
3490 {
3491 /* If the file is not demand paged, which means that we
3492 don't require the sections to be correctly aligned in the
3493 file, then there is no other reason for a new segment. */
b34976b6 3494 new_segment = FALSE;
252b5132
RH		 3495 }
3496 else if (! writable
3497 && (hdr->flags & SEC_READONLY) == 0
baaff79e 3498 && (((last_hdr->lma + last_size - 1)
b89fe0ee
AM		 3499 & ~(maxpagesize - 1))
3500 != (hdr->lma & ~(maxpagesize - 1))))
252b5132
RH		 3501 {
3502 /* We don't want to put a writable section in a read only
3503 segment, unless they are on the same page in memory
3504 anyhow. We already know that the last section does not
3505 bring us past the current section on the page, so the
3506 only case in which the new section is not on the same
3507 page as the previous section is when the previous section
3508 ends precisely on a page boundary. */
b34976b6 3509 new_segment = TRUE;
252b5132
RH		 3510 }
3511 else
3512 {
3513 /* Otherwise, we can use the same segment. */
b34976b6 3514 new_segment = FALSE;
252b5132
RH		 3515 }
3516
3517 if (! new_segment)
3518 {
3519 if ((hdr->flags & SEC_READONLY) == 0)
b34976b6 3520 writable = TRUE;
baaff79e
JJ		 3521 last_hdr = hdr;
3522 /* .tbss sections effectively have zero size. */
e5caec89 3523 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
eea6121a 3524 last_size = hdr->size;
baaff79e
JJ		 3525 else
3526 last_size = 0;
252b5132
RH		 3527 continue;
3528 }
3529
3530 /* We need a new program segment. We must create a new program
3531 header holding all the sections from phdr_index until hdr. */
3532
3533 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3534 if (m == NULL)
3535 goto error_return;
3536
3537 *pm = m;
3538 pm = &m->next;
3539
3540 if ((hdr->flags & SEC_READONLY) == 0)
b34976b6 3541 writable = TRUE;
252b5132 3542 else
b34976b6 3543 writable = FALSE;
252b5132
RH		 3544
3545 last_hdr = hdr;
baaff79e
JJ		 3546 /* .tbss sections effectively have zero size. */
3547 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
eea6121a 3548 last_size = hdr->size;
baaff79e
JJ		 3549 else
3550 last_size = 0;
252b5132 3551 phdr_index = i;
b34976b6 3552 phdr_in_segment = FALSE;
252b5132
RH		 3553 }
3554
3555 /* Create a final PT_LOAD program segment. */
3556 if (last_hdr != NULL)
3557 {
3558 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3559 if (m == NULL)
3560 goto error_return;
3561
3562 *pm = m;
3563 pm = &m->next;
3564 }
3565
3566 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3567 if (dynsec != NULL)
3568 {
dc810e39 3569 amt = sizeof (struct elf_segment_map);
217aa764 3570 m = bfd_zalloc (abfd, amt);
252b5132
RH		 3571 if (m == NULL)
3572 goto error_return;
3573 m->next = NULL;
3574 m->p_type = PT_DYNAMIC;
3575 m->count = 1;
3576 m->sections[0] = dynsec;
3577
3578 *pm = m;
3579 pm = &m->next;
3580 }
3581
3582 /* For each loadable .note section, add a PT_NOTE segment. We don't
3583 use bfd_get_section_by_name, because if we link together
3584 nonloadable .note sections and loadable .note sections, we will
3585 generate two .note sections in the output file. FIXME: Using
3586 names for section types is bogus anyhow. */
3587 for (s = abfd->sections; s != NULL; s = s->next)
3588 {
3589 if ((s->flags & SEC_LOAD) != 0
3590 && strncmp (s->name, ".note", 5) == 0)
3591 {
dc810e39 3592 amt = sizeof (struct elf_segment_map);
217aa764 3593 m = bfd_zalloc (abfd, amt);
252b5132
RH		 3594 if (m == NULL)
3595 goto error_return;
3596 m->next = NULL;
3597 m->p_type = PT_NOTE;
3598 m->count = 1;
3599 m->sections[0] = s;
3600
3601 *pm = m;
3602 pm = &m->next;
3603 }
13ae64f3
JJ		 3604 if (s->flags & SEC_THREAD_LOCAL)
3605 {
3606 if (! tls_count)
3607 first_tls = s;
3608 tls_count++;
3609 }
3610 }
3611
3612 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3613 if (tls_count > 0)
3614 {
3615 int i;
3616
3617 amt = sizeof (struct elf_segment_map);
3618 amt += (tls_count - 1) * sizeof (asection *);
217aa764 3619 m = bfd_zalloc (abfd, amt);
13ae64f3
JJ		 3620 if (m == NULL)
3621 goto error_return;
3622 m->next = NULL;
3623 m->p_type = PT_TLS;
3624 m->count = tls_count;
3625 /* Mandated PF_R. */
3626 m->p_flags = PF_R;
3627 m->p_flags_valid = 1;
3628 for (i = 0; i < tls_count; ++i)
3629 {
3630 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3631 m->sections[i] = first_tls;
3632 first_tls = first_tls->next;
3633 }
3634
3635 *pm = m;
3636 pm = &m->next;
252b5132
RH		 3637 }
3638
65765700
JJ		 3639 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3640 segment. */
126495ed
AM		 3641 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3642 if (eh_frame_hdr != NULL
3643 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
65765700
JJ		 3644 {
3645 amt = sizeof (struct elf_segment_map);
217aa764 3646 m = bfd_zalloc (abfd, amt);
65765700
JJ		 3647 if (m == NULL)
3648 goto error_return;
3649 m->next = NULL;
3650 m->p_type = PT_GNU_EH_FRAME;
3651 m->count = 1;
126495ed 3652 m->sections[0] = eh_frame_hdr->output_section;
65765700
JJ		 3653
3654 *pm = m;
3655 pm = &m->next;
3656 }
3657
9ee5e499
JJ		 3658 if (elf_tdata (abfd)->stack_flags)
3659 {
3660 amt = sizeof (struct elf_segment_map);
217aa764 3661 m = bfd_zalloc (abfd, amt);
9ee5e499
JJ		 3662 if (m == NULL)
3663 goto error_return;
3664 m->next = NULL;
3665 m->p_type = PT_GNU_STACK;
3666 m->p_flags = elf_tdata (abfd)->stack_flags;
3667 m->p_flags_valid = 1;
3668
3669 *pm = m;
3670 pm = &m->next;
3671 }
3672
8c37241b
JJ		 3673 if (elf_tdata (abfd)->relro)
3674 {
3675 amt = sizeof (struct elf_segment_map);
3676 m = bfd_zalloc (abfd, amt);
3677 if (m == NULL)
3678 goto error_return;
3679 m->next = NULL;
3680 m->p_type = PT_GNU_RELRO;
3681 m->p_flags = PF_R;
3682 m->p_flags_valid = 1;
3683
3684 *pm = m;
3685 pm = &m->next;
3686 }
3687
252b5132
RH		 3688 free (sections);
3689 sections = NULL;
3690
3691 elf_tdata (abfd)->segment_map = mfirst;
b34976b6 3692 return TRUE;
252b5132
RH		 3693
3694 error_return:
3695 if (sections != NULL)
3696 free (sections);
b34976b6 3697 return FALSE;
252b5132
RH		 3698}
3699
3700/* Sort sections by address. */
3701
3702static int
217aa764 3703elf_sort_sections (const void *arg1, const void *arg2)
252b5132
RH		 3704{
3705 const asection *sec1 = *(const asection **) arg1;
3706 const asection *sec2 = *(const asection **) arg2;
eecdbe52 3707 bfd_size_type size1, size2;
252b5132
RH		 3708
3709 /* Sort by LMA first, since this is the address used to
3710 place the section into a segment. */
3711 if (sec1->lma < sec2->lma)
3712 return -1;
3713 else if (sec1->lma > sec2->lma)
3714 return 1;
3715
3716 /* Then sort by VMA. Normally the LMA and the VMA will be
3717 the same, and this will do nothing. */
3718 if (sec1->vma < sec2->vma)
3719 return -1;
3720 else if (sec1->vma > sec2->vma)
3721 return 1;
3722
3723 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3724
07c6e936 3725#define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
252b5132
RH		 3726
3727 if (TOEND (sec1))
3728 {
3729 if (TOEND (sec2))
00a7cdc5
NC		 3730 {
3731 /* If the indicies are the same, do not return 0
3732 here, but continue to try the next comparison. */
3733 if (sec1->target_index - sec2->target_index != 0)
3734 return sec1->target_index - sec2->target_index;
3735 }
252b5132
RH		 3736 else
3737 return 1;
3738 }
00a7cdc5 3739 else if (TOEND (sec2))
252b5132
RH		 3740 return -1;
3741
3742#undef TOEND
3743
00a7cdc5
NC		 3744 /* Sort by size, to put zero sized sections
3745 before others at the same address. */
252b5132 3746
eea6121a
AM		 3747 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
3748 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
eecdbe52
JJ		 3749
3750 if (size1 < size2)
252b5132 3751 return -1;
eecdbe52 3752 if (size1 > size2)
252b5132
RH		 3753 return 1;
3754
3755 return sec1->target_index - sec2->target_index;
3756}
3757
340b6d91
AC		 3758/* Ian Lance Taylor writes:
3759
3760 We shouldn't be using % with a negative signed number. That's just
3761 not good. We have to make sure either that the number is not
3762 negative, or that the number has an unsigned type. When the types
3763 are all the same size they wind up as unsigned. When file_ptr is a
3764 larger signed type, the arithmetic winds up as signed long long,
3765 which is wrong.
3766
3767 What we're trying to say here is something like ``increase OFF by
3768 the least amount that will cause it to be equal to the VMA modulo
3769 the page size.'' */
3770/* In other words, something like:
3771
3772 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3773 off_offset = off % bed->maxpagesize;
3774 if (vma_offset < off_offset)
3775 adjustment = vma_offset + bed->maxpagesize - off_offset;
3776 else
3777 adjustment = vma_offset - off_offset;
3778
3779 which can can be collapsed into the expression below. */
3780
3781static file_ptr
3782vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
3783{
3784 return ((vma - off) % maxpagesize);
3785}
3786
252b5132
RH		 3787/* Assign file positions to the sections based on the mapping from
3788 sections to segments. This function also sets up some fields in
3789 the file header, and writes out the program headers. */
3790
b34976b6 3791static bfd_boolean
c84fca4d 3792assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
252b5132
RH		 3793{
3794 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3795 unsigned int count;
3796 struct elf_segment_map *m;
3797 unsigned int alloc;
3798 Elf_Internal_Phdr *phdrs;
3799 file_ptr off, voff;
3800 bfd_vma filehdr_vaddr, filehdr_paddr;
3801 bfd_vma phdrs_vaddr, phdrs_paddr;
3802 Elf_Internal_Phdr *p;
dc810e39 3803 bfd_size_type amt;
252b5132
RH		 3804
3805 if (elf_tdata (abfd)->segment_map == NULL)
3806 {
3807 if (! map_sections_to_segments (abfd))
b34976b6 3808 return FALSE;
252b5132 3809 }
1ed89aa9
NC		 3810 else
3811 {
3812 /* The placement algorithm assumes that non allocated sections are
3813 not in PT_LOAD segments. We ensure this here by removing such
3814 sections from the segment map. */
3815 for (m = elf_tdata (abfd)->segment_map;
3816 m != NULL;
3817 m = m->next)
3818 {
3819 unsigned int new_count;
3820 unsigned int i;
3821
3822 if (m->p_type != PT_LOAD)
3823 continue;
3824
3825 new_count = 0;
3826 for (i = 0; i < m->count; i ++)
3827 {
3828 if ((m->sections[i]->flags & SEC_ALLOC) != 0)
3829 {
47d9a591 3830 if (i != new_count)
1ed89aa9
NC		 3831 m->sections[new_count] = m->sections[i];
3832
3833 new_count ++;
3834 }
3835 }
3836
3837 if (new_count != m->count)
3838 m->count = new_count;
3839 }
3840 }
252b5132
RH		 3841
3842 if (bed->elf_backend_modify_segment_map)
3843 {
c84fca4d 3844 if (! (*bed->elf_backend_modify_segment_map) (abfd, link_info))
b34976b6 3845 return FALSE;
252b5132
RH		 3846 }
3847
3848 count = 0;
3849 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3850 ++count;
3851
3852 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
3853 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
3854 elf_elfheader (abfd)->e_phnum = count;
3855
3856 if (count == 0)
b34976b6 3857 return TRUE;
252b5132
RH		 3858
3859 /* If we already counted the number of program segments, make sure
3860 that we allocated enough space. This happens when SIZEOF_HEADERS
3861 is used in a linker script. */
3862 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
3863 if (alloc != 0 && count > alloc)
3864 {
3865 ((*_bfd_error_handler)
3866 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3867 bfd_get_filename (abfd), alloc, count));
3868 bfd_set_error (bfd_error_bad_value);
b34976b6 3869 return FALSE;
252b5132
RH		 3870 }
3871
3872 if (alloc == 0)
3873 alloc = count;
3874
dc810e39 3875 amt = alloc * sizeof (Elf_Internal_Phdr);
217aa764 3876 phdrs = bfd_alloc (abfd, amt);
252b5132 3877 if (phdrs == NULL)
b34976b6 3878 return FALSE;
252b5132
RH		 3879
3880 off = bed->s->sizeof_ehdr;
3881 off += alloc * bed->s->sizeof_phdr;
3882
3883 filehdr_vaddr = 0;
3884 filehdr_paddr = 0;
3885 phdrs_vaddr = 0;
3886 phdrs_paddr = 0;
3887
3888 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
3889 m != NULL;
3890 m = m->next, p++)
3891 {
3892 unsigned int i;
3893 asection **secpp;
3894
3895 /* If elf_segment_map is not from map_sections_to_segments, the
47d9a591 3896 sections may not be correctly ordered. NOTE: sorting should
52e9b619
MS		 3897 not be done to the PT_NOTE section of a corefile, which may
3898 contain several pseudo-sections artificially created by bfd.
3899 Sorting these pseudo-sections breaks things badly. */
47d9a591
AM		 3900 if (m->count > 1
3901 && !(elf_elfheader (abfd)->e_type == ET_CORE
52e9b619 3902 && m->p_type == PT_NOTE))
252b5132
RH		 3903 qsort (m->sections, (size_t) m->count, sizeof (asection *),
3904 elf_sort_sections);
3905
3906 p->p_type = m->p_type;
28a7f3e7 3907 p->p_flags = m->p_flags;
252b5132
RH		 3908
3909 if (p->p_type == PT_LOAD
3910 && m->count > 0
3911 && (m->sections[0]->flags & SEC_ALLOC) != 0)
3912 {
3913 if ((abfd->flags & D_PAGED) != 0)
340b6d91
AC		 3914 off += vma_page_aligned_bias (m->sections[0]->vma, off,
3915 bed->maxpagesize);
252b5132
RH		 3916 else
3917 {
3918 bfd_size_type align;
3919
3920 align = 0;
3921 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3922 {
3923 bfd_size_type secalign;
3924
3925 secalign = bfd_get_section_alignment (abfd, *secpp);
3926 if (secalign > align)
3927 align = secalign;
3928 }
3929
340b6d91
AC		 3930 off += vma_page_aligned_bias (m->sections[0]->vma, off,
3931 1 << align);
252b5132
RH		 3932 }
3933 }
b1a6d0b1
NC		 3934 /* Make sure the .dynamic section is the first section in the
3935 PT_DYNAMIC segment. */
3936 else if (p->p_type == PT_DYNAMIC
3937 && m->count > 1
3938 && strcmp (m->sections[0]->name, ".dynamic") != 0)
3939 {
3940 _bfd_error_handler
3941 (_("%s: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
3942 bfd_get_filename (abfd));
3943 bfd_set_error (bfd_error_bad_value);
3944 return FALSE;
3945 }
252b5132
RH		 3946
3947 if (m->count == 0)
3948 p->p_vaddr = 0;
3949 else
3950 p->p_vaddr = m->sections[0]->vma;
3951
3952 if (m->p_paddr_valid)
3953 p->p_paddr = m->p_paddr;
3954 else if (m->count == 0)
3955 p->p_paddr = 0;
3956 else
3957 p->p_paddr = m->sections[0]->lma;
3958
3959 if (p->p_type == PT_LOAD
3960 && (abfd->flags & D_PAGED) != 0)
3961 p->p_align = bed->maxpagesize;
3962 else if (m->count == 0)
45d6a902 3963 p->p_align = 1 << bed->s->log_file_align;
252b5132
RH		 3964 else
3965 p->p_align = 0;
3966
3967 p->p_offset = 0;
3968 p->p_filesz = 0;
3969 p->p_memsz = 0;
3970
3971 if (m->includes_filehdr)
3972 {
3973 if (! m->p_flags_valid)
3974 p->p_flags |= PF_R;
3975 p->p_offset = 0;
3976 p->p_filesz = bed->s->sizeof_ehdr;
3977 p->p_memsz = bed->s->sizeof_ehdr;
3978 if (m->count > 0)
3979 {
3980 BFD_ASSERT (p->p_type == PT_LOAD);
3981
3982 if (p->p_vaddr < (bfd_vma) off)
3983 {
caf47ea6
AM		 3984 (*_bfd_error_handler)
3985 (_("%s: Not enough room for program headers, try linking with -N"),
3986 bfd_get_filename (abfd));
252b5132 3987 bfd_set_error (bfd_error_bad_value);
b34976b6 3988 return FALSE;
252b5132
RH		 3989 }
3990
3991 p->p_vaddr -= off;
3992 if (! m->p_paddr_valid)
3993 p->p_paddr -= off;
3994 }
3995 if (p->p_type == PT_LOAD)
3996 {
3997 filehdr_vaddr = p->p_vaddr;
3998 filehdr_paddr = p->p_paddr;
3999 }
4000 }
4001
4002 if (m->includes_phdrs)
4003 {
4004 if (! m->p_flags_valid)
4005 p->p_flags |= PF_R;
4006
4007 if (m->includes_filehdr)
4008 {
4009 if (p->p_type == PT_LOAD)
4010 {
4011 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
4012 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
4013 }
4014 }
4015 else
4016 {
4017 p->p_offset = bed->s->sizeof_ehdr;
4018
4019 if (m->count > 0)
4020 {
4021 BFD_ASSERT (p->p_type == PT_LOAD);
4022 p->p_vaddr -= off - p->p_offset;
4023 if (! m->p_paddr_valid)
4024 p->p_paddr -= off - p->p_offset;
4025 }
4026
4027 if (p->p_type == PT_LOAD)
4028 {
4029 phdrs_vaddr = p->p_vaddr;
4030 phdrs_paddr = p->p_paddr;
4031 }
4032 else
4033 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4034 }
4035
4036 p->p_filesz += alloc * bed->s->sizeof_phdr;
4037 p->p_memsz += alloc * bed->s->sizeof_phdr;
4038 }
4039
4040 if (p->p_type == PT_LOAD
4041 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4042 {
4043 if (! m->includes_filehdr && ! m->includes_phdrs)
4044 p->p_offset = off;
4045 else
4046 {
4047 file_ptr adjust;
4048
4049 adjust = off - (p->p_offset + p->p_filesz);
4050 p->p_filesz += adjust;
4051 p->p_memsz += adjust;
4052 }
4053 }
4054
4055 voff = off;
4056
4057 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4058 {
4059 asection *sec;
4060 flagword flags;
4061 bfd_size_type align;
4062
4063 sec = *secpp;
4064 flags = sec->flags;
4065 align = 1 << bfd_get_section_alignment (abfd, sec);
4066
4067 /* The section may have artificial alignment forced by a
4068 link script. Notice this case by the gap between the
f5ffc919
NC		 4069 cumulative phdr lma and the section's lma. */
4070 if (p->p_paddr + p->p_memsz < sec->lma)
252b5132 4071 {
f5ffc919 4072 bfd_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
252b5132
RH		 4073
4074 p->p_memsz += adjust;
eecdbe52
JJ		 4075 if (p->p_type == PT_LOAD
4076 || (p->p_type == PT_NOTE
4077 && bfd_get_format (abfd) == bfd_core))
4078 {
4079 off += adjust;
4080 voff += adjust;
4081 }
4082 if ((flags & SEC_LOAD) != 0
4083 || (flags & SEC_THREAD_LOCAL) != 0)
252b5132
RH		 4084 p->p_filesz += adjust;
4085 }
4086
4087 if (p->p_type == PT_LOAD)
4088 {
4089 bfd_signed_vma adjust;
4090
4091 if ((flags & SEC_LOAD) != 0)
4092 {
4093 adjust = sec->lma - (p->p_paddr + p->p_memsz);
4094 if (adjust < 0)
4095 adjust = 0;
4096 }
4097 else if ((flags & SEC_ALLOC) != 0)
4098 {
4099 /* The section VMA must equal the file position
4100 modulo the page size. FIXME: I'm not sure if
4101 this adjustment is really necessary. We used to
4102 not have the SEC_LOAD case just above, and then
4103 this was necessary, but now I'm not sure. */
4104 if ((abfd->flags & D_PAGED) != 0)
340b6d91
AC		 4105 adjust = vma_page_aligned_bias (sec->vma, voff,
4106 bed->maxpagesize);
252b5132 4107 else
340b6d91
AC		 4108 adjust = vma_page_aligned_bias (sec->vma, voff,
4109 align);
252b5132
RH		 4110 }
4111 else
4112 adjust = 0;
4113
4114 if (adjust != 0)
4115 {
4116 if (i == 0)
4117 {
cdc7c09f
NC		 4118 (* _bfd_error_handler) (_("\
4119Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
4120 bfd_section_name (abfd, sec),
4121 sec->lma,
4122 p->p_paddr);
b34976b6 4123 return FALSE;
252b5132
RH		 4124 }
4125 p->p_memsz += adjust;
4126 off += adjust;
4127 voff += adjust;
4128 if ((flags & SEC_LOAD) != 0)
4129 p->p_filesz += adjust;
4130 }
4131
4132 sec->filepos = off;
4133
4134 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
4135 used in a linker script we may have a section with
4136 SEC_LOAD clear but which is supposed to have
4137 contents. */
4138 if ((flags & SEC_LOAD) != 0
4139 || (flags & SEC_HAS_CONTENTS) != 0)
eea6121a 4140 off += sec->size;
252b5132 4141
eecdbe52
JJ		 4142 if ((flags & SEC_ALLOC) != 0
4143 && ((flags & SEC_LOAD) != 0
4144 || (flags & SEC_THREAD_LOCAL) == 0))
eea6121a 4145 voff += sec->size;
252b5132
RH		 4146 }
4147
4148 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4149 {
4a938328
MS		 4150 /* The actual "note" segment has i == 0.
4151 This is the one that actually contains everything. */
4152 if (i == 0)
4153 {
252b5132 4154 sec->filepos = off;
eea6121a
AM		 4155 p->p_filesz = sec->size;
4156 off += sec->size;
252b5132
RH		 4157 voff = off;
4158 }
4a938328 4159 else
252b5132 4160 {
4a938328 4161 /* Fake sections -- don't need to be written. */
252b5132 4162 sec->filepos = 0;
eea6121a 4163 sec->size = 0;
4a938328 4164 flags = sec->flags = 0;
252b5132
RH		 4165 }
4166 p->p_memsz = 0;
4167 p->p_align = 1;
4168 }
4169 else
4170 {
eecdbe52
JJ		 4171 if ((sec->flags & SEC_LOAD) != 0
4172 || (sec->flags & SEC_THREAD_LOCAL) == 0
4173 || p->p_type == PT_TLS)
eea6121a 4174 p->p_memsz += sec->size;
252b5132
RH		 4175
4176 if ((flags & SEC_LOAD) != 0)
eea6121a 4177 p->p_filesz += sec->size;
252b5132 4178
13ae64f3 4179 if (p->p_type == PT_TLS
eea6121a 4180 && sec->size == 0
13ae64f3
JJ		 4181 && (sec->flags & SEC_HAS_CONTENTS) == 0)
4182 {
4183 struct bfd_link_order *o;
4184 bfd_vma tbss_size = 0;
4185
4186 for (o = sec->link_order_head; o != NULL; o = o->next)
4187 if (tbss_size < o->offset + o->size)
4188 tbss_size = o->offset + o->size;
4189
4190 p->p_memsz += tbss_size;
4191 }
4192
252b5132
RH		 4193 if (align > p->p_align
4194 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
4195 p->p_align = align;
4196 }
4197
4198 if (! m->p_flags_valid)
4199 {
4200 p->p_flags |= PF_R;
4201 if ((flags & SEC_CODE) != 0)
4202 p->p_flags |= PF_X;
4203 if ((flags & SEC_READONLY) == 0)
4204 p->p_flags |= PF_W;
4205 }
4206 }
4207 }
4208
4209 /* Now that we have set the section file positions, we can set up
4210 the file positions for the non PT_LOAD segments. */
4211 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4212 m != NULL;
4213 m = m->next, p++)
4214 {
4215 if (p->p_type != PT_LOAD && m->count > 0)
4216 {
4217 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
4218 p->p_offset = m->sections[0]->filepos;
4219 }
4220 if (m->count == 0)
4221 {
4222 if (m->includes_filehdr)
4223 {
4224 p->p_vaddr = filehdr_vaddr;
4225 if (! m->p_paddr_valid)
4226 p->p_paddr = filehdr_paddr;
4227 }
4228 else if (m->includes_phdrs)
4229 {
4230 p->p_vaddr = phdrs_vaddr;
4231 if (! m->p_paddr_valid)
4232 p->p_paddr = phdrs_paddr;
4233 }
8c37241b
JJ		 4234 else if (p->p_type == PT_GNU_RELRO)
4235 {
4236 Elf_Internal_Phdr *lp;
4237
4238 for (lp = phdrs; lp < phdrs + count; ++lp)
4239 {
4240 if (lp->p_type == PT_LOAD
4241 && lp->p_vaddr <= link_info->relro_end
4242 && lp->p_vaddr >= link_info->relro_start
4243 && lp->p_vaddr + lp->p_filesz
4244 >= link_info->relro_end)
4245 break;
4246 }
4247
4248 if (lp < phdrs + count
4249 && link_info->relro_end > lp->p_vaddr)
4250 {
4251 p->p_vaddr = lp->p_vaddr;
4252 p->p_paddr = lp->p_paddr;
4253 p->p_offset = lp->p_offset;
4254 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4255 p->p_memsz = p->p_filesz;
4256 p->p_align = 1;
4257 p->p_flags = (lp->p_flags & ~PF_W);
4258 }
4259 else
4260 {
4261 memset (p, 0, sizeof *p);
4262 p->p_type = PT_NULL;
4263 }
4264 }
252b5132
RH		 4265 }
4266 }
4267
4268 /* Clear out any program headers we allocated but did not use. */
4269 for (; count < alloc; count++, p++)
4270 {
4271 memset (p, 0, sizeof *p);
4272 p->p_type = PT_NULL;
4273 }
4274
4275 elf_tdata (abfd)->phdr = phdrs;
4276
4277 elf_tdata (abfd)->next_file_pos = off;
4278
4279 /* Write out the program headers. */
dc810e39 4280 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
252b5132 4281 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
b34976b6 4282 return FALSE;
252b5132 4283
b34976b6 4284 return TRUE;
252b5132
RH		 4285}
4286
4287/* Get the size of the program header.
4288
4289 If this is called by the linker before any of the section VMA's are set, it
4290 can't calculate the correct value for a strange memory layout. This only
4291 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4292 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4293 data segment (exclusive of .interp and .dynamic).
4294
4295 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4296 will be two segments. */
4297
4298static bfd_size_type
217aa764 4299get_program_header_size (bfd *abfd)
252b5132
RH		 4300{
4301 size_t segs;
4302 asection *s;
9c5bfbb7 4303 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
252b5132
RH		 4304
4305 /* We can't return a different result each time we're called. */
4306 if (elf_tdata (abfd)->program_header_size != 0)
4307 return elf_tdata (abfd)->program_header_size;
4308
4309 if (elf_tdata (abfd)->segment_map != NULL)
4310 {
4311 struct elf_segment_map *m;
4312
4313 segs = 0;
4314 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4315 ++segs;
4316 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4317 return elf_tdata (abfd)->program_header_size;
4318 }
4319
4320 /* Assume we will need exactly two PT_LOAD segments: one for text
4321 and one for data. */
4322 segs = 2;
4323
4324 s = bfd_get_section_by_name (abfd, ".interp");
4325 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4326 {
4327 /* If we have a loadable interpreter section, we need a
4328 PT_INTERP segment. In this case, assume we also need a
ab3acfbe 4329 PT_PHDR segment, although that may not be true for all
252b5132
RH		 4330 targets. */
4331 segs += 2;
4332 }
4333
4334 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4335 {
4336 /* We need a PT_DYNAMIC segment. */
4337 ++segs;
4338 }
4339
126495ed 4340 if (elf_tdata (abfd)->eh_frame_hdr)
65765700
JJ		 4341 {
4342 /* We need a PT_GNU_EH_FRAME segment. */
4343 ++segs;
4344 }
4345
9ee5e499
JJ		 4346 if (elf_tdata (abfd)->stack_flags)
4347 {
4348 /* We need a PT_GNU_STACK segment. */
4349 ++segs;
4350 }
4351
8c37241b
JJ		 4352 if (elf_tdata (abfd)->relro)
4353 {
4354 /* We need a PT_GNU_RELRO segment. */
4355 ++segs;
4356 }
4357
252b5132
RH		 4358 for (s = abfd->sections; s != NULL; s = s->next)
4359 {
4360 if ((s->flags & SEC_LOAD) != 0
4361 && strncmp (s->name, ".note", 5) == 0)
4362 {
4363 /* We need a PT_NOTE segment. */
4364 ++segs;
4365 }
4366 }
4367
13ae64f3
JJ		 4368 for (s = abfd->sections; s != NULL; s = s->next)
4369 {
4370 if (s->flags & SEC_THREAD_LOCAL)
4371 {
4372 /* We need a PT_TLS segment. */
4373 ++segs;
4374 break;
4375 }
4376 }
4377
252b5132
RH		 4378 /* Let the backend count up any program headers it might need. */
4379 if (bed->elf_backend_additional_program_headers)
4380 {
4381 int a;
4382
4383 a = (*bed->elf_backend_additional_program_headers) (abfd);
4384 if (a == -1)
4385 abort ();
4386 segs += a;
4387 }
4388
4389 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4390 return elf_tdata (abfd)->program_header_size;
4391}
4392
4393/* Work out the file positions of all the sections. This is called by
4394 _bfd_elf_compute_section_file_positions. All the section sizes and
4395 VMAs must be known before this is called.
4396
4397 We do not consider reloc sections at this point, unless they form
4398 part of the loadable image. Reloc sections are assigned file
4399 positions in assign_file_positions_for_relocs, which is called by
4400 write_object_contents and final_link.
4401
4402 We also don't set the positions of the .symtab and .strtab here. */
4403
b34976b6 4404static bfd_boolean
c84fca4d
AO		 4405assign_file_positions_except_relocs (bfd *abfd,
4406 struct bfd_link_info *link_info)
252b5132
RH		 4407{
4408 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4409 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4410 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
9ad5cbcf 4411 unsigned int num_sec = elf_numsections (abfd);
252b5132 4412 file_ptr off;
9c5bfbb7 4413 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
252b5132
RH		 4414
4415 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4416 && bfd_get_format (abfd) != bfd_core)
4417 {
4418 Elf_Internal_Shdr **hdrpp;
4419 unsigned int i;
4420
4421 /* Start after the ELF header. */
4422 off = i_ehdrp->e_ehsize;
4423
4424 /* We are not creating an executable, which means that we are
4425 not creating a program header, and that the actual order of
4426 the sections in the file is unimportant. */
9ad5cbcf 4427 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
252b5132
RH		 4428 {
4429 Elf_Internal_Shdr *hdr;
4430
4431 hdr = *hdrpp;
9ad5cbcf
AM		 4432 if (hdr->sh_type == SHT_REL
4433 || hdr->sh_type == SHT_RELA
4434 || i == tdata->symtab_section
4435 || i == tdata->symtab_shndx_section
252b5132
RH		 4436 || i == tdata->strtab_section)
4437 {
4438 hdr->sh_offset = -1;
252b5132 4439 }
9ad5cbcf 4440 else
b34976b6 4441 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
252b5132 4442
9ad5cbcf
AM		 4443 if (i == SHN_LORESERVE - 1)
4444 {
4445 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4446 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4447 }
252b5132
RH		 4448 }
4449 }
4450 else
4451 {
4452 unsigned int i;
4453 Elf_Internal_Shdr **hdrpp;
4454
4455 /* Assign file positions for the loaded sections based on the
4456 assignment of sections to segments. */
c84fca4d 4457 if (! assign_file_positions_for_segments (abfd, link_info))
b34976b6 4458 return FALSE;
252b5132
RH		 4459
4460 /* Assign file positions for the other sections. */
4461
4462 off = elf_tdata (abfd)->next_file_pos;
9ad5cbcf 4463 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
252b5132
RH		 4464 {
4465 Elf_Internal_Shdr *hdr;
4466
4467 hdr = *hdrpp;
4468 if (hdr->bfd_section != NULL
4469 && hdr->bfd_section->filepos != 0)
4470 hdr->sh_offset = hdr->bfd_section->filepos;
4471 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4472 {
4473 ((*_bfd_error_handler)
4474 (_("%s: warning: allocated section `%s' not in segment"),
4475 bfd_get_filename (abfd),
4476 (hdr->bfd_section == NULL
4477 ? "*unknown*"
4478 : hdr->bfd_section->name)));
4479 if ((abfd->flags & D_PAGED) != 0)
340b6d91
AC		 4480 off += vma_page_aligned_bias (hdr->sh_addr, off,
4481 bed->maxpagesize);
252b5132 4482 else
340b6d91
AC		 4483 off += vma_page_aligned_bias (hdr->sh_addr, off,
4484 hdr->sh_addralign);
252b5132 4485 off = _bfd_elf_assign_file_position_for_section (hdr, off,
b34976b6 4486 FALSE);
252b5132
RH		 4487 }
4488 else if (hdr->sh_type == SHT_REL
4489 || hdr->sh_type == SHT_RELA
4490 || hdr == i_shdrpp[tdata->symtab_section]
9ad5cbcf 4491 || hdr == i_shdrpp[tdata->symtab_shndx_section]
252b5132
RH		 4492 || hdr == i_shdrpp[tdata->strtab_section])
4493 hdr->sh_offset = -1;
4494 else
b34976b6 4495 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
9ad5cbcf
AM		 4496
4497 if (i == SHN_LORESERVE - 1)
4498 {
4499 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4500 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4501 }
252b5132
RH		 4502 }
4503 }
4504
4505 /* Place the section headers. */
45d6a902 4506 off = align_file_position (off, 1 << bed->s->log_file_align);
252b5132
RH		 4507 i_ehdrp->e_shoff = off;
4508 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4509
4510 elf_tdata (abfd)->next_file_pos = off;
4511
b34976b6 4512 return TRUE;
252b5132
RH		 4513}
4514
b34976b6 4515static bfd_boolean
217aa764 4516prep_headers (bfd *abfd)
252b5132
RH		 4517{
4518 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4519 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4520 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
2b0f7ef9 4521 struct elf_strtab_hash *shstrtab;
9c5bfbb7 4522 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
252b5132
RH		 4523
4524 i_ehdrp = elf_elfheader (abfd);
4525 i_shdrp = elf_elfsections (abfd);
4526
2b0f7ef9 4527 shstrtab = _bfd_elf_strtab_init ();
252b5132 4528 if (shstrtab == NULL)
b34976b6 4529 return FALSE;
252b5132
RH		 4530
4531 elf_shstrtab (abfd) = shstrtab;
4532
4533 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4534 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4535 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4536 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4537
4538 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4539 i_ehdrp->e_ident[EI_DATA] =
4540 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4541 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4542
252b5132
RH		 4543 if ((abfd->flags & DYNAMIC) != 0)
4544 i_ehdrp->e_type = ET_DYN;
4545 else if ((abfd->flags & EXEC_P) != 0)
4546 i_ehdrp->e_type = ET_EXEC;
4547 else if (bfd_get_format (abfd) == bfd_core)
4548 i_ehdrp->e_type = ET_CORE;
4549 else
4550 i_ehdrp->e_type = ET_REL;
4551
4552 switch (bfd_get_arch (abfd))
4553 {
4554 case bfd_arch_unknown:
4555 i_ehdrp->e_machine = EM_NONE;
4556 break;
aa4f99bb
AO		 4557
4558 /* There used to be a long list of cases here, each one setting
4559 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4560 in the corresponding bfd definition. To avoid duplication,
4561 the switch was removed. Machines that need special handling
4562 can generally do it in elf_backend_final_write_processing(),
4563 unless they need the information earlier than the final write.
4564 Such need can generally be supplied by replacing the tests for
4565 e_machine with the conditions used to determine it. */
252b5132 4566 default:
9c5bfbb7
AM		 4567 i_ehdrp->e_machine = bed->elf_machine_code;
4568 }
aa4f99bb 4569
252b5132
RH		 4570 i_ehdrp->e_version = bed->s->ev_current;
4571 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4572
c044fabd 4573 /* No program header, for now. */
252b5132
RH		 4574 i_ehdrp->e_phoff = 0;
4575 i_ehdrp->e_phentsize = 0;
4576 i_ehdrp->e_phnum = 0;
4577
c044fabd 4578 /* Each bfd section is section header entry. */
252b5132
RH		 4579 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4580 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4581
c044fabd 4582 /* If we're building an executable, we'll need a program header table. */
252b5132
RH		 4583 if (abfd->flags & EXEC_P)
4584 {
c044fabd 4585 /* It all happens later. */
252b5132
RH		 4586#if 0
4587 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
4588
4589 /* elf_build_phdrs() returns a (NULL-terminated) array of
c044fabd 4590 Elf_Internal_Phdrs. */
252b5132
RH		 4591 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
4592 i_ehdrp->e_phoff = outbase;
4593 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
4594#endif
4595 }
4596 else
4597 {
4598 i_ehdrp->e_phentsize = 0;
4599 i_phdrp = 0;
4600 i_ehdrp->e_phoff = 0;
4601 }
4602
4603 elf_tdata (abfd)->symtab_hdr.sh_name =
b34976b6 4604 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
252b5132 4605 elf_tdata (abfd)->strtab_hdr.sh_name =
b34976b6 4606 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
252b5132 4607 elf_tdata (abfd)->shstrtab_hdr.sh_name =
b34976b6 4608 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
252b5132
RH		 4609 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4610 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4611 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
b34976b6 4612 return FALSE;
252b5132 4613
b34976b6 4614 return TRUE;
252b5132
RH		 4615}
4616
4617/* Assign file positions for all the reloc sections which are not part
4618 of the loadable file image. */
4619
4620void
217aa764 4621_bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
252b5132
RH		 4622{
4623 file_ptr off;
9ad5cbcf 4624 unsigned int i, num_sec;
252b5132
RH		 4625 Elf_Internal_Shdr **shdrpp;
4626
4627 off = elf_tdata (abfd)->next_file_pos;
4628
9ad5cbcf
AM		 4629 num_sec = elf_numsections (abfd);
4630 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
252b5132
RH		 4631 {
4632 Elf_Internal_Shdr *shdrp;
4633
4634 shdrp = *shdrpp;
4635 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4636 && shdrp->sh_offset == -1)
b34976b6 4637 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
252b5132
RH		 4638 }
4639
4640 elf_tdata (abfd)->next_file_pos = off;
4641}
4642
b34976b6 4643bfd_boolean
217aa764 4644_bfd_elf_write_object_contents (bfd *abfd)
252b5132 4645{
9c5bfbb7 4646 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
252b5132
RH		 4647 Elf_Internal_Ehdr *i_ehdrp;
4648 Elf_Internal_Shdr **i_shdrp;
b34976b6 4649 bfd_boolean failed;
9ad5cbcf 4650 unsigned int count, num_sec;
252b5132
RH		 4651
4652 if (! abfd->output_has_begun
217aa764 4653 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
b34976b6 4654 return FALSE;
252b5132
RH		 4655
4656 i_shdrp = elf_elfsections (abfd);
4657 i_ehdrp = elf_elfheader (abfd);
4658
b34976b6 4659 failed = FALSE;
252b5132
RH		 4660 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4661 if (failed)
b34976b6 4662 return FALSE;
252b5132
RH		 4663
4664 _bfd_elf_assign_file_positions_for_relocs (abfd);
4665
c044fabd 4666 /* After writing the headers, we need to write the sections too... */
9ad5cbcf
AM		 4667 num_sec = elf_numsections (abfd);
4668 for (count = 1; count < num_sec; count++)
252b5132
RH		 4669 {
4670 if (bed->elf_backend_section_processing)
4671 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4672 if (i_shdrp[count]->contents)
4673 {
dc810e39
AM		 4674 bfd_size_type amt = i_shdrp[count]->sh_size;
4675
252b5132 4676 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
dc810e39 4677 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
b34976b6 4678 return FALSE;
252b5132 4679 }
9ad5cbcf
AM		 4680 if (count == SHN_LORESERVE - 1)
4681 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
252b5132
RH		 4682 }
4683
4684 /* Write out the section header names. */
4685 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
2b0f7ef9 4686 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd)))
b34976b6 4687 return FALSE;
252b5132
RH		 4688
4689 if (bed->elf_backend_final_write_processing)
4690 (*bed->elf_backend_final_write_processing) (abfd,
4691 elf_tdata (abfd)->linker);
4692
4693 return bed->s->write_shdrs_and_ehdr (abfd);
4694}
4695
b34976b6 4696bfd_boolean
217aa764 4697_bfd_elf_write_corefile_contents (bfd *abfd)
252b5132 4698{
c044fabd 4699 /* Hopefully this can be done just like an object file. */
252b5132
RH		 4700 return _bfd_elf_write_object_contents (abfd);
4701}
c044fabd
KH		 4702
4703/* Given a section, search the header to find them. */
4704
252b5132 4705int
198beae2 4706_bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
252b5132 4707{
9c5bfbb7 4708 const struct elf_backend_data *bed;
252b5132 4709 int index;
252b5132 4710
9ad5cbcf
AM		 4711 if (elf_section_data (asect) != NULL
4712 && elf_section_data (asect)->this_idx != 0)
4713 return elf_section_data (asect)->this_idx;
4714
4715 if (bfd_is_abs_section (asect))
af746e92
AM		 4716 index = SHN_ABS;
4717 else if (bfd_is_com_section (asect))
4718 index = SHN_COMMON;
4719 else if (bfd_is_und_section (asect))
4720 index = SHN_UNDEF;
4721 else
252b5132 4722 {
af746e92
AM		 4723 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
4724 int maxindex = elf_numsections (abfd);
4725
4726 for (index = 1; index < maxindex; index++)
4727 {
4728 Elf_Internal_Shdr *hdr = i_shdrp[index];
4729
4730 if (hdr != NULL && hdr->bfd_section == asect)
4731 return index;
4732 }
4733 index = -1;
252b5132
RH		 4734 }
4735
af746e92 4736 bed = get_elf_backend_data (abfd);
252b5132
RH		 4737 if (bed->elf_backend_section_from_bfd_section)
4738 {
af746e92 4739 int retval = index;
9ad5cbcf 4740
af746e92
AM		 4741 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4742 return retval;
252b5132
RH		 4743 }
4744
af746e92
AM		 4745 if (index == -1)
4746 bfd_set_error (bfd_error_nonrepresentable_section);
252b5132 4747
af746e92 4748 return index;
252b5132
RH		 4749}
4750
4751/* Given a BFD symbol, return the index in the ELF symbol table, or -1
4752 on error. */
4753
4754int
217aa764 4755_bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
252b5132
RH		 4756{
4757 asymbol *asym_ptr = *asym_ptr_ptr;
4758 int idx;
4759 flagword flags = asym_ptr->flags;
4760
4761 /* When gas creates relocations against local labels, it creates its
4762 own symbol for the section, but does put the symbol into the
4763 symbol chain, so udata is 0. When the linker is generating
4764 relocatable output, this section symbol may be for one of the
4765 input sections rather than the output section. */
4766 if (asym_ptr->udata.i == 0
4767 && (flags & BSF_SECTION_SYM)
4768 && asym_ptr->section)
4769 {
4770 int indx;
4771
4772 if (asym_ptr->section->output_section != NULL)
4773 indx = asym_ptr->section->output_section->index;
4774 else
4775 indx = asym_ptr->section->index;
4e89ac30
L		 4776 if (indx < elf_num_section_syms (abfd)
4777 && elf_section_syms (abfd)[indx] != NULL)
252b5132
RH		 4778 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
4779 }
4780
4781 idx = asym_ptr->udata.i;
4782
4783 if (idx == 0)
4784 {
4785 /* This case can occur when using --strip-symbol on a symbol
4786 which is used in a relocation entry. */
4787 (*_bfd_error_handler)
d003868e
AM		 4788 (_("%B: symbol `%s' required but not present"),
4789 abfd, bfd_asymbol_name (asym_ptr));
252b5132
RH		 4790 bfd_set_error (bfd_error_no_symbols);
4791 return -1;
4792 }
4793
4794#if DEBUG & 4
4795 {
4796 fprintf (stderr,
661a3fd4 4797 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
252b5132
RH		 4798 (long) asym_ptr, asym_ptr->name, idx, flags,
4799 elf_symbol_flags (flags));
4800 fflush (stderr);
4801 }
4802#endif
4803
4804 return idx;
4805}
4806
4807/* Copy private BFD data. This copies any program header information. */
4808
b34976b6 4809static bfd_boolean
217aa764 4810copy_private_bfd_data (bfd *ibfd, bfd *obfd)
252b5132 4811{
b34976b6
AM		 4812 Elf_Internal_Ehdr *iehdr;
4813 struct elf_segment_map *map;
4814 struct elf_segment_map *map_first;
4815 struct elf_segment_map **pointer_to_map;
4816 Elf_Internal_Phdr *segment;
4817 asection *section;
4818 unsigned int i;
4819 unsigned int num_segments;
4820 bfd_boolean phdr_included = FALSE;
4821 bfd_vma maxpagesize;
4822 struct elf_segment_map *phdr_adjust_seg = NULL;
4823 unsigned int phdr_adjust_num = 0;
9c5bfbb7 4824 const struct elf_backend_data *bed;
bc67d8a6 4825
c044fabd 4826 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
252b5132 4827 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
b34976b6 4828 return TRUE;
252b5132
RH		 4829
4830 if (elf_tdata (ibfd)->phdr == NULL)
b34976b6 4831 return TRUE;
252b5132 4832
caf47ea6 4833 bed = get_elf_backend_data (ibfd);
252b5132
RH		 4834 iehdr = elf_elfheader (ibfd);
4835
bc67d8a6 4836 map_first = NULL;
c044fabd 4837 pointer_to_map = &map_first;
252b5132
RH		 4838
4839 num_segments = elf_elfheader (ibfd)->e_phnum;
bc67d8a6
NC		 4840 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
4841
4842 /* Returns the end address of the segment + 1. */
aecc8f8a
AM		 4843#define SEGMENT_END(segment, start) \
4844 (start + (segment->p_memsz > segment->p_filesz \
4845 ? segment->p_memsz : segment->p_filesz))
bc67d8a6 4846
eecdbe52
JJ		 4847#define SECTION_SIZE(section, segment) \
4848 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4849 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
eea6121a 4850 ? section->size : 0)
eecdbe52 4851
b34976b6 4852 /* Returns TRUE if the given section is contained within
bc67d8a6 4853 the given segment. VMA addresses are compared. */
aecc8f8a
AM		 4854#define IS_CONTAINED_BY_VMA(section, segment) \
4855 (section->vma >= segment->p_vaddr \
eecdbe52 4856 && (section->vma + SECTION_SIZE (section, segment) \
aecc8f8a 4857 <= (SEGMENT_END (segment, segment->p_vaddr))))
c044fabd 4858
b34976b6 4859 /* Returns TRUE if the given section is contained within
bc67d8a6 4860 the given segment. LMA addresses are compared. */
aecc8f8a
AM		 4861#define IS_CONTAINED_BY_LMA(section, segment, base) \
4862 (section->lma >= base \
eecdbe52 4863 && (section->lma + SECTION_SIZE (section, segment) \
aecc8f8a 4864 <= SEGMENT_END (segment, base)))
252b5132 4865
c044fabd 4866 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
aecc8f8a
AM		 4867#define IS_COREFILE_NOTE(p, s) \
4868 (p->p_type == PT_NOTE \
4869 && bfd_get_format (ibfd) == bfd_core \
4870 && s->vma == 0 && s->lma == 0 \
4871 && (bfd_vma) s->filepos >= p->p_offset \
eea6121a 4872 && ((bfd_vma) s->filepos + s->size \
aecc8f8a 4873 <= p->p_offset + p->p_filesz))
252b5132
RH		 4874
4875 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4876 linker, which generates a PT_INTERP section with p_vaddr and
4877 p_memsz set to 0. */
aecc8f8a
AM		 4878#define IS_SOLARIS_PT_INTERP(p, s) \
4879 (p->p_vaddr == 0 \
4880 && p->p_paddr == 0 \
4881 && p->p_memsz == 0 \
4882 && p->p_filesz > 0 \
4883 && (s->flags & SEC_HAS_CONTENTS) != 0 \
eea6121a 4884 && s->size > 0 \
aecc8f8a 4885 && (bfd_vma) s->filepos >= p->p_offset \
eea6121a 4886 && ((bfd_vma) s->filepos + s->size \
aecc8f8a 4887 <= p->p_offset + p->p_filesz))
5c440b1e 4888
bc67d8a6
NC		 4889 /* Decide if the given section should be included in the given segment.
4890 A section will be included if:
f5ffc919
NC		 4891 1. It is within the address space of the segment -- we use the LMA
4892 if that is set for the segment and the VMA otherwise,
bc67d8a6
NC		 4893 2. It is an allocated segment,
4894 3. There is an output section associated with it,
eecdbe52 4895 4. The section has not already been allocated to a previous segment.
03394ac9
NC		 4896 5. PT_GNU_STACK segments do not include any sections.
4897 6. PT_TLS segment includes only SHF_TLS sections.
4898 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */
caf47ea6 4899#define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
aecc8f8a
AM		 4900 ((((segment->p_paddr \
4901 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4902 : IS_CONTAINED_BY_VMA (section, segment)) \
f5ffc919 4903 && (section->flags & SEC_ALLOC) != 0) \
b6821651 4904 || IS_COREFILE_NOTE (segment, section)) \
f5ffc919 4905 && section->output_section != NULL \
03394ac9 4906 && segment->p_type != PT_GNU_STACK \
eecdbe52
JJ		 4907 && (segment->p_type != PT_TLS \
4908 || (section->flags & SEC_THREAD_LOCAL)) \
4909 && (segment->p_type == PT_LOAD \
4910 || segment->p_type == PT_TLS \
4911 || (section->flags & SEC_THREAD_LOCAL) == 0) \
82e51918 4912 && ! section->segment_mark)
bc67d8a6 4913
b34976b6 4914 /* Returns TRUE iff seg1 starts after the end of seg2. */
b5f852ea
NC		 4915#define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
4916 (seg1->field >= SEGMENT_END (seg2, seg2->field))
4917
4918 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
4919 their VMA address ranges and their LMA address ranges overlap.
4920 It is possible to have overlapping VMA ranges without overlapping LMA
4921 ranges. RedBoot images for example can have both .data and .bss mapped
4922 to the same VMA range, but with the .data section mapped to a different
4923 LMA. */
aecc8f8a 4924#define SEGMENT_OVERLAPS(seg1, seg2) \
b5f852ea
NC		 4925 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
4926 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
4927 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
4928 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
bc67d8a6
NC		 4929
4930 /* Initialise the segment mark field. */
4931 for (section = ibfd->sections; section != NULL; section = section->next)
b34976b6 4932 section->segment_mark = FALSE;
bc67d8a6 4933
252b5132 4934 /* Scan through the segments specified in the program header
bc67d8a6 4935 of the input BFD. For this first scan we look for overlaps
9ad5cbcf 4936 in the loadable segments. These can be created by weird
aecc8f8a 4937 parameters to objcopy. Also, fix some solaris weirdness. */
bc67d8a6
NC		 4938 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4939 i < num_segments;
c044fabd 4940 i++, segment++)
252b5132 4941 {
252b5132 4942 unsigned int j;
c044fabd 4943 Elf_Internal_Phdr *segment2;
252b5132 4944
aecc8f8a
AM		 4945 if (segment->p_type == PT_INTERP)
4946 for (section = ibfd->sections; section; section = section->next)
4947 if (IS_SOLARIS_PT_INTERP (segment, section))
4948 {
4949 /* Mininal change so that the normal section to segment
4cc11e76 4950 assignment code will work. */
aecc8f8a
AM		 4951 segment->p_vaddr = section->vma;
4952 break;
4953 }
4954
bc67d8a6
NC		 4955 if (segment->p_type != PT_LOAD)
4956 continue;
c044fabd 4957
bc67d8a6 4958 /* Determine if this segment overlaps any previous segments. */
c044fabd 4959 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
bc67d8a6
NC		 4960 {
4961 bfd_signed_vma extra_length;
c044fabd 4962
bc67d8a6
NC		 4963 if (segment2->p_type != PT_LOAD
4964 || ! SEGMENT_OVERLAPS (segment, segment2))
4965 continue;
c044fabd 4966
bc67d8a6
NC		 4967 /* Merge the two segments together. */
4968 if (segment2->p_vaddr < segment->p_vaddr)
4969 {
c044fabd
KH		 4970 /* Extend SEGMENT2 to include SEGMENT and then delete
4971 SEGMENT. */
bc67d8a6
NC		 4972 extra_length =
4973 SEGMENT_END (segment, segment->p_vaddr)
4974 - SEGMENT_END (segment2, segment2->p_vaddr);
c044fabd 4975
bc67d8a6
NC		 4976 if (extra_length > 0)
4977 {
4978 segment2->p_memsz += extra_length;
4979 segment2->p_filesz += extra_length;
4980 }
c044fabd 4981
bc67d8a6 4982 segment->p_type = PT_NULL;
c044fabd 4983
bc67d8a6
NC		 4984 /* Since we have deleted P we must restart the outer loop. */
4985 i = 0;
4986 segment = elf_tdata (ibfd)->phdr;
4987 break;
4988 }
4989 else
4990 {
c044fabd
KH		 4991 /* Extend SEGMENT to include SEGMENT2 and then delete
4992 SEGMENT2. */
bc67d8a6
NC		 4993 extra_length =
4994 SEGMENT_END (segment2, segment2->p_vaddr)
4995 - SEGMENT_END (segment, segment->p_vaddr);
c044fabd 4996
bc67d8a6
NC		 4997 if (extra_length > 0)
4998 {
4999 segment->p_memsz += extra_length;
5000 segment->p_filesz += extra_length;
5001 }
c044fabd 5002
bc67d8a6
NC		 5003 segment2->p_type = PT_NULL;
5004 }
5005 }
5006 }
c044fabd 5007
bc67d8a6
NC		 5008 /* The second scan attempts to assign sections to segments. */
5009 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5010 i < num_segments;
5011 i ++, segment ++)
5012 {
5013 unsigned int section_count;
5014 asection ** sections;
5015 asection * output_section;
5016 unsigned int isec;
5017 bfd_vma matching_lma;
5018 bfd_vma suggested_lma;
5019 unsigned int j;
dc810e39 5020 bfd_size_type amt;
bc67d8a6
NC		 5021
5022 if (segment->p_type == PT_NULL)
5023 continue;
c044fabd 5024
bc67d8a6 5025 /* Compute how many sections might be placed into this segment. */
b5f852ea
NC		 5026 for (section = ibfd->sections, section_count = 0;
5027 section != NULL;
5028 section = section->next)
caf47ea6 5029 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
c044fabd 5030 ++section_count;
811072d8 5031
b5f852ea
NC		 5032 /* Allocate a segment map big enough to contain
5033 all of the sections we have selected. */
dc810e39
AM		 5034 amt = sizeof (struct elf_segment_map);
5035 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
217aa764 5036 map = bfd_alloc (obfd, amt);
bc67d8a6 5037 if (map == NULL)
b34976b6 5038 return FALSE;
252b5132
RH		 5039
5040 /* Initialise the fields of the segment map. Default to
5041 using the physical address of the segment in the input BFD. */
bc67d8a6
NC		 5042 map->next = NULL;
5043 map->p_type = segment->p_type;
5044 map->p_flags = segment->p_flags;
5045 map->p_flags_valid = 1;
5046 map->p_paddr = segment->p_paddr;
5047 map->p_paddr_valid = 1;
252b5132
RH		 5048
5049 /* Determine if this segment contains the ELF file header
5050 and if it contains the program headers themselves. */
bc67d8a6
NC		 5051 map->includes_filehdr = (segment->p_offset == 0
5052 && segment->p_filesz >= iehdr->e_ehsize);
252b5132 5053
bc67d8a6 5054 map->includes_phdrs = 0;
252b5132 5055
bc67d8a6 5056 if (! phdr_included || segment->p_type != PT_LOAD)
252b5132 5057 {
bc67d8a6
NC		 5058 map->includes_phdrs =
5059 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5060 && (segment->p_offset + segment->p_filesz
252b5132
RH		 5061 >= ((bfd_vma) iehdr->e_phoff
5062 + iehdr->e_phnum * iehdr->e_phentsize)));
c044fabd 5063
bc67d8a6 5064 if (segment->p_type == PT_LOAD && map->includes_phdrs)
b34976b6 5065 phdr_included = TRUE;
252b5132
RH		 5066 }
5067
bc67d8a6 5068 if (section_count == 0)
252b5132
RH		 5069 {
5070 /* Special segments, such as the PT_PHDR segment, may contain
5071 no sections, but ordinary, loadable segments should contain
1ed89aa9
NC		 5072 something. They are allowed by the ELF spec however, so only
5073 a warning is produced. */
bc67d8a6 5074 if (segment->p_type == PT_LOAD)
caf47ea6 5075 (*_bfd_error_handler)
d003868e
AM		 5076 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5077 ibfd);
252b5132 5078
bc67d8a6 5079 map->count = 0;
c044fabd
KH		 5080 *pointer_to_map = map;
5081 pointer_to_map = &map->next;
252b5132
RH		 5082
5083 continue;
5084 }
5085
5086 /* Now scan the sections in the input BFD again and attempt
5087 to add their corresponding output sections to the segment map.
5088 The problem here is how to handle an output section which has
5089 been moved (ie had its LMA changed). There are four possibilities:
5090
5091 1. None of the sections have been moved.
5092 In this case we can continue to use the segment LMA from the
5093 input BFD.
5094
5095 2. All of the sections have been moved by the same amount.
5096 In this case we can change the segment's LMA to match the LMA
5097 of the first section.
5098
5099 3. Some of the sections have been moved, others have not.
5100 In this case those sections which have not been moved can be
5101 placed in the current segment which will have to have its size,
5102 and possibly its LMA changed, and a new segment or segments will
5103 have to be created to contain the other sections.
5104
b5f852ea 5105 4. The sections have been moved, but not by the same amount.
252b5132
RH		 5106 In this case we can change the segment's LMA to match the LMA
5107 of the first section and we will have to create a new segment
5108 or segments to contain the other sections.
5109
5110 In order to save time, we allocate an array to hold the section
5111 pointers that we are interested in. As these sections get assigned
5112 to a segment, they are removed from this array. */
5113
0b14c2aa
L		 5114 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5115 to work around this long long bug. */
5116 amt = section_count * sizeof (asection *);
217aa764 5117 sections = bfd_malloc (amt);
252b5132 5118 if (sections == NULL)
b34976b6 5119 return FALSE;
252b5132
RH		 5120
5121 /* Step One: Scan for segment vs section LMA conflicts.
5122 Also add the sections to the section array allocated above.
5123 Also add the sections to the current segment. In the common
5124 case, where the sections have not been moved, this means that
5125 we have completely filled the segment, and there is nothing
5126 more to do. */
252b5132 5127 isec = 0;
72730e0c 5128 matching_lma = 0;
252b5132
RH		 5129 suggested_lma = 0;
5130
bc67d8a6
NC		 5131 for (j = 0, section = ibfd->sections;
5132 section != NULL;
5133 section = section->next)
252b5132 5134 {
caf47ea6 5135 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
c0f7859b 5136 {
bc67d8a6
NC		 5137 output_section = section->output_section;
5138
5139 sections[j ++] = section;
252b5132
RH		 5140
5141 /* The Solaris native linker always sets p_paddr to 0.
5142 We try to catch that case here, and set it to the
5e8d7549
NC		 5143 correct value. Note - some backends require that
5144 p_paddr be left as zero. */
bc67d8a6 5145 if (segment->p_paddr == 0
4455705d 5146 && segment->p_vaddr != 0
5e8d7549 5147 && (! bed->want_p_paddr_set_to_zero)
252b5132 5148 && isec == 0
bc67d8a6
NC		 5149 && output_section->lma != 0
5150 && (output_section->vma == (segment->p_vaddr
5151 + (map->includes_filehdr
5152 ? iehdr->e_ehsize
5153 : 0)
5154 + (map->includes_phdrs
079e9a2f
AM		 5155 ? (iehdr->e_phnum
5156 * iehdr->e_phentsize)
bc67d8a6
NC		 5157 : 0))))
5158 map->p_paddr = segment->p_vaddr;
252b5132
RH		 5159
5160 /* Match up the physical address of the segment with the
5161 LMA address of the output section. */
bc67d8a6 5162 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5e8d7549
NC		 5163 || IS_COREFILE_NOTE (segment, section)
5164 || (bed->want_p_paddr_set_to_zero &&
5165 IS_CONTAINED_BY_VMA (output_section, segment))
5166 )
252b5132
RH		 5167 {
5168 if (matching_lma == 0)
bc67d8a6 5169 matching_lma = output_section->lma;
252b5132
RH		 5170
5171 /* We assume that if the section fits within the segment
bc67d8a6 5172 then it does not overlap any other section within that
252b5132 5173 segment. */
bc67d8a6 5174 map->sections[isec ++] = output_section;
252b5132
RH		 5175 }
5176 else if (suggested_lma == 0)
bc67d8a6 5177 suggested_lma = output_section->lma;
252b5132
RH		 5178 }
5179 }
5180
bc67d8a6 5181 BFD_ASSERT (j == section_count);
252b5132
RH		 5182
5183 /* Step Two: Adjust the physical address of the current segment,
5184 if necessary. */
bc67d8a6 5185 if (isec == section_count)
252b5132
RH		 5186 {
5187 /* All of the sections fitted within the segment as currently
5188 specified. This is the default case. Add the segment to
5189 the list of built segments and carry on to process the next
5190 program header in the input BFD. */
bc67d8a6 5191 map->count = section_count;
c044fabd
KH		 5192 *pointer_to_map = map;
5193 pointer_to_map = &map->next;
252b5132
RH		 5194
5195 free (sections);
5196 continue;
5197 }
252b5132
RH		 5198 else
5199 {
72730e0c
AM		 5200 if (matching_lma != 0)
5201 {
5202 /* At least one section fits inside the current segment.
5203 Keep it, but modify its physical address to match the
5204 LMA of the first section that fitted. */
bc67d8a6 5205 map->p_paddr = matching_lma;
72730e0c
AM		 5206 }
5207 else
5208 {
5209 /* None of the sections fitted inside the current segment.
5210 Change the current segment's physical address to match
5211 the LMA of the first section. */
bc67d8a6 5212 map->p_paddr = suggested_lma;
72730e0c
AM		 5213 }
5214
bc67d8a6
NC		 5215 /* Offset the segment physical address from the lma
5216 to allow for space taken up by elf headers. */
5217 if (map->includes_filehdr)
5218 map->p_paddr -= iehdr->e_ehsize;
252b5132 5219
bc67d8a6
NC		 5220 if (map->includes_phdrs)
5221 {
5222 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5223
5224 /* iehdr->e_phnum is just an estimate of the number
5225 of program headers that we will need. Make a note
5226 here of the number we used and the segment we chose
5227 to hold these headers, so that we can adjust the
5228 offset when we know the correct value. */
5229 phdr_adjust_num = iehdr->e_phnum;
5230 phdr_adjust_seg = map;
5231 }
252b5132
RH		 5232 }
5233
5234 /* Step Three: Loop over the sections again, this time assigning
caf47ea6 5235 those that fit to the current segment and removing them from the
252b5132
RH		 5236 sections array; but making sure not to leave large gaps. Once all
5237 possible sections have been assigned to the current segment it is
5238 added to the list of built segments and if sections still remain
5239 to be assigned, a new segment is constructed before repeating
5240 the loop. */
5241 isec = 0;
5242 do
5243 {
bc67d8a6 5244 map->count = 0;
252b5132
RH		 5245 suggested_lma = 0;
5246
5247 /* Fill the current segment with sections that fit. */
bc67d8a6 5248 for (j = 0; j < section_count; j++)
252b5132 5249 {
bc67d8a6 5250 section = sections[j];
252b5132 5251
bc67d8a6 5252 if (section == NULL)
252b5132
RH		 5253 continue;
5254
bc67d8a6 5255 output_section = section->output_section;
252b5132 5256
bc67d8a6 5257 BFD_ASSERT (output_section != NULL);
c044fabd 5258
bc67d8a6
NC		 5259 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5260 || IS_COREFILE_NOTE (segment, section))
252b5132 5261 {
bc67d8a6 5262 if (map->count == 0)
252b5132
RH		 5263 {
5264 /* If the first section in a segment does not start at
bc67d8a6
NC		 5265 the beginning of the segment, then something is
5266 wrong. */
5267 if (output_section->lma !=
5268 (map->p_paddr
5269 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5270 + (map->includes_phdrs
5271 ? iehdr->e_phnum * iehdr->e_phentsize
5272 : 0)))
252b5132
RH		 5273 abort ();
5274 }
5275 else
5276 {
5277 asection * prev_sec;
252b5132 5278
bc67d8a6 5279 prev_sec = map->sections[map->count - 1];
252b5132
RH		 5280
5281 /* If the gap between the end of the previous section
bc67d8a6
NC		 5282 and the start of this section is more than
5283 maxpagesize then we need to start a new segment. */
eea6121a 5284 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
079e9a2f 5285 maxpagesize)
caf47ea6 5286 < BFD_ALIGN (output_section->lma, maxpagesize))
eea6121a 5287 || ((prev_sec->lma + prev_sec->size)
079e9a2f 5288 > output_section->lma))
252b5132
RH		 5289 {
5290 if (suggested_lma == 0)
bc67d8a6 5291 suggested_lma = output_section->lma;
252b5132
RH		 5292
5293 continue;
5294 }
5295 }
5296
bc67d8a6 5297 map->sections[map->count++] = output_section;
252b5132
RH		 5298 ++isec;
5299 sections[j] = NULL;
b34976b6 5300 section->segment_mark = TRUE;
252b5132
RH		 5301 }
5302 else if (suggested_lma == 0)
bc67d8a6 5303 suggested_lma = output_section->lma;
252b5132
RH		 5304 }
5305
bc67d8a6 5306 BFD_ASSERT (map->count > 0);
252b5132
RH		 5307
5308 /* Add the current segment to the list of built segments. */
c044fabd
KH		 5309 *pointer_to_map = map;
5310 pointer_to_map = &map->next;
252b5132 5311
bc67d8a6 5312 if (isec < section_count)
252b5132
RH		 5313 {
5314 /* We still have not allocated all of the sections to
5315 segments. Create a new segment here, initialise it
5316 and carry on looping. */
dc810e39
AM		 5317 amt = sizeof (struct elf_segment_map);
5318 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
217aa764 5319 map = bfd_alloc (obfd, amt);
bc67d8a6 5320 if (map == NULL)
5ed6aba4
NC		 5321 {
5322 free (sections);
5323 return FALSE;
5324 }
252b5132
RH		 5325
5326 /* Initialise the fields of the segment map. Set the physical
5327 physical address to the LMA of the first section that has
5328 not yet been assigned. */
bc67d8a6
NC		 5329 map->next = NULL;
5330 map->p_type = segment->p_type;
5331 map->p_flags = segment->p_flags;
5332 map->p_flags_valid = 1;
5333 map->p_paddr = suggested_lma;
5334 map->p_paddr_valid = 1;
5335 map->includes_filehdr = 0;
5336 map->includes_phdrs = 0;
252b5132
RH		 5337 }
5338 }
bc67d8a6 5339 while (isec < section_count);
252b5132
RH		 5340
5341 free (sections);
5342 }
5343
5344 /* The Solaris linker creates program headers in which all the
5345 p_paddr fields are zero. When we try to objcopy or strip such a
5346 file, we get confused. Check for this case, and if we find it
5347 reset the p_paddr_valid fields. */
bc67d8a6
NC		 5348 for (map = map_first; map != NULL; map = map->next)
5349 if (map->p_paddr != 0)
252b5132 5350 break;
bc67d8a6 5351 if (map == NULL)
b5f852ea
NC		 5352 for (map = map_first; map != NULL; map = map->next)
5353 map->p_paddr_valid = 0;
252b5132 5354
bc67d8a6
NC		 5355 elf_tdata (obfd)->segment_map = map_first;
5356
5357 /* If we had to estimate the number of program headers that were
9ad5cbcf 5358 going to be needed, then check our estimate now and adjust
bc67d8a6
NC		 5359 the offset if necessary. */
5360 if (phdr_adjust_seg != NULL)
5361 {
5362 unsigned int count;
c044fabd 5363
bc67d8a6 5364 for (count = 0, map = map_first; map != NULL; map = map->next)
c044fabd 5365 count++;
252b5132 5366
bc67d8a6
NC		 5367 if (count > phdr_adjust_num)
5368 phdr_adjust_seg->p_paddr
5369 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5370 }
c044fabd 5371
252b5132 5372#if 0
c044fabd
KH		 5373 /* Final Step: Sort the segments into ascending order of physical
5374 address. */
bc67d8a6 5375 if (map_first != NULL)
252b5132 5376 {
c044fabd 5377 struct elf_segment_map *prev;
252b5132 5378
bc67d8a6
NC		 5379 prev = map_first;
5380 for (map = map_first->next; map != NULL; prev = map, map = map->next)
252b5132 5381 {
bc67d8a6
NC		 5382 /* Yes I know - its a bubble sort.... */
5383 if (map->next != NULL && (map->next->p_paddr < map->p_paddr))
252b5132 5384 {
bc67d8a6
NC		 5385 /* Swap map and map->next. */
5386 prev->next = map->next;
5387 map->next = map->next->next;
5388 prev->next->next = map;
252b5132 5389
bc67d8a6
NC		 5390 /* Restart loop. */
5391 map = map_first;
252b5132
RH		 5392 }
5393 }
5394 }
5395#endif
5396
bc67d8a6 5397#undef SEGMENT_END
eecdbe52 5398#undef SECTION_SIZE
bc67d8a6
NC		 5399#undef IS_CONTAINED_BY_VMA
5400#undef IS_CONTAINED_BY_LMA
252b5132 5401#undef IS_COREFILE_NOTE
bc67d8a6
NC		 5402#undef IS_SOLARIS_PT_INTERP
5403#undef INCLUDE_SECTION_IN_SEGMENT
5404#undef SEGMENT_AFTER_SEGMENT
5405#undef SEGMENT_OVERLAPS
b34976b6 5406 return TRUE;
252b5132
RH		 5407}
5408
5409/* Copy private section information. This copies over the entsize
5410 field, and sometimes the info field. */
5411
b34976b6 5412bfd_boolean
217aa764
AM		 5413_bfd_elf_copy_private_section_data (bfd *ibfd,
5414 asection *isec,
5415 bfd *obfd,
5416 asection *osec)
252b5132
RH		 5417{
5418 Elf_Internal_Shdr *ihdr, *ohdr;
5419
5420 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5421 || obfd->xvec->flavour != bfd_target_elf_flavour)
b34976b6 5422 return TRUE;
252b5132 5423
252b5132
RH		 5424 ihdr = &elf_section_data (isec)->this_hdr;
5425 ohdr = &elf_section_data (osec)->this_hdr;
5426
5427 ohdr->sh_entsize = ihdr->sh_entsize;
5428
5429 if (ihdr->sh_type == SHT_SYMTAB
5430 || ihdr->sh_type == SHT_DYNSYM
5431 || ihdr->sh_type == SHT_GNU_verneed
5432 || ihdr->sh_type == SHT_GNU_verdef)
5433 ohdr->sh_info = ihdr->sh_info;
5434
9dce4196
AM		 5435 /* Set things up for objcopy. The output SHT_GROUP section will
5436 have its elf_next_in_group pointing back to the input group
5437 members. */
5438 elf_next_in_group (osec) = elf_next_in_group (isec);
5439 elf_group_name (osec) = elf_group_name (isec);
5440
68bfbfcc 5441 osec->use_rela_p = isec->use_rela_p;
bf572ba0 5442
b34976b6 5443 return TRUE;
252b5132
RH		 5444}
5445
80fccad2
BW		 5446/* Copy private header information. */
5447
5448bfd_boolean
5449_bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
5450{
5451 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5452 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5453 return TRUE;
5454
5455 /* Copy over private BFD data if it has not already been copied.
5456 This must be done here, rather than in the copy_private_bfd_data
5457 entry point, because the latter is called after the section
5458 contents have been set, which means that the program headers have
5459 already been worked out. */
5460 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5461 {
5462 if (! copy_private_bfd_data (ibfd, obfd))
5463 return FALSE;
5464 }
5465
5466 return TRUE;
5467}
5468
252b5132
RH		 5469/* Copy private symbol information. If this symbol is in a section
5470 which we did not map into a BFD section, try to map the section
5471 index correctly. We use special macro definitions for the mapped
5472 section indices; these definitions are interpreted by the
5473 swap_out_syms function. */
5474
9ad5cbcf
AM		 5475#define MAP_ONESYMTAB (SHN_HIOS + 1)
5476#define MAP_DYNSYMTAB (SHN_HIOS + 2)
5477#define MAP_STRTAB (SHN_HIOS + 3)
5478#define MAP_SHSTRTAB (SHN_HIOS + 4)
5479#define MAP_SYM_SHNDX (SHN_HIOS + 5)
252b5132 5480
b34976b6 5481bfd_boolean
217aa764
AM		 5482_bfd_elf_copy_private_symbol_data (bfd *ibfd,
5483 asymbol *isymarg,
5484 bfd *obfd,
5485 asymbol *osymarg)
252b5132
RH		 5486{
5487 elf_symbol_type *isym, *osym;
5488
5489 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5490 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
b34976b6 5491 return TRUE;
252b5132
RH		 5492
5493 isym = elf_symbol_from (ibfd, isymarg);
5494 osym = elf_symbol_from (obfd, osymarg);
5495
5496 if (isym != NULL
5497 && osym != NULL
5498 && bfd_is_abs_section (isym->symbol.section))
5499 {
5500 unsigned int shndx;
5501
5502 shndx = isym->internal_elf_sym.st_shndx;
5503 if (shndx == elf_onesymtab (ibfd))
5504 shndx = MAP_ONESYMTAB;
5505 else if (shndx == elf_dynsymtab (ibfd))
5506 shndx = MAP_DYNSYMTAB;
5507 else if (shndx == elf_tdata (ibfd)->strtab_section)
5508 shndx = MAP_STRTAB;
5509 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5510 shndx = MAP_SHSTRTAB;
9ad5cbcf
AM		 5511 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5512 shndx = MAP_SYM_SHNDX;
252b5132
RH		 5513 osym->internal_elf_sym.st_shndx = shndx;
5514 }
5515
b34976b6 5516 return TRUE;
252b5132
RH		 5517}
5518
5519/* Swap out the symbols. */
5520
b34976b6 5521static bfd_boolean
217aa764
AM		 5522swap_out_syms (bfd *abfd,
5523 struct bfd_strtab_hash **sttp,
5524 int relocatable_p)
252b5132 5525{
9c5bfbb7 5526 const struct elf_backend_data *bed;
079e9a2f
AM		 5527 int symcount;
5528 asymbol **syms;
5529 struct bfd_strtab_hash *stt;
5530 Elf_Internal_Shdr *symtab_hdr;
9ad5cbcf 5531 Elf_Internal_Shdr *symtab_shndx_hdr;
079e9a2f
AM		 5532 Elf_Internal_Shdr *symstrtab_hdr;
5533 char *outbound_syms;
9ad5cbcf 5534 char *outbound_shndx;
079e9a2f
AM		 5535 int idx;
5536 bfd_size_type amt;
174fd7f9 5537 bfd_boolean name_local_sections;
252b5132
RH		 5538
5539 if (!elf_map_symbols (abfd))
b34976b6 5540 return FALSE;
252b5132 5541
c044fabd 5542 /* Dump out the symtabs. */
079e9a2f
AM		 5543 stt = _bfd_elf_stringtab_init ();
5544 if (stt == NULL)
b34976b6 5545 return FALSE;
252b5132 5546
079e9a2f
AM		 5547 bed = get_elf_backend_data (abfd);
5548 symcount = bfd_get_symcount (abfd);
5549 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5550 symtab_hdr->sh_type = SHT_SYMTAB;
5551 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5552 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5553 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
45d6a902 5554 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
079e9a2f
AM		 5555
5556 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5557 symstrtab_hdr->sh_type = SHT_STRTAB;
5558
5559 amt = (bfd_size_type) (1 + symcount) * bed->s->sizeof_sym;
5560 outbound_syms = bfd_alloc (abfd, amt);
5561 if (outbound_syms == NULL)
5ed6aba4
NC		 5562 {
5563 _bfd_stringtab_free (stt);
5564 return FALSE;
5565 }
217aa764 5566 symtab_hdr->contents = outbound_syms;
252b5132 5567
9ad5cbcf
AM		 5568 outbound_shndx = NULL;
5569 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5570 if (symtab_shndx_hdr->sh_name != 0)
5571 {
5572 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
1126897b 5573 outbound_shndx = bfd_zalloc (abfd, amt);
9ad5cbcf 5574 if (outbound_shndx == NULL)
5ed6aba4
NC		 5575 {
5576 _bfd_stringtab_free (stt);
5577 return FALSE;
5578 }
5579
9ad5cbcf
AM		 5580 symtab_shndx_hdr->contents = outbound_shndx;
5581 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5582 symtab_shndx_hdr->sh_size = amt;
5583 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5584 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5585 }
5586
589e6347 5587 /* Now generate the data (for "contents"). */
079e9a2f
AM		 5588 {
5589 /* Fill in zeroth symbol and swap it out. */
5590 Elf_Internal_Sym sym;
5591 sym.st_name = 0;
5592 sym.st_value = 0;
5593 sym.st_size = 0;
5594 sym.st_info = 0;
5595 sym.st_other = 0;
5596 sym.st_shndx = SHN_UNDEF;
9ad5cbcf 5597 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
079e9a2f 5598 outbound_syms += bed->s->sizeof_sym;
9ad5cbcf
AM		 5599 if (outbound_shndx != NULL)
5600 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
079e9a2f 5601 }
252b5132 5602
174fd7f9
RS		 5603 name_local_sections
5604 = (bed->elf_backend_name_local_section_symbols
5605 && bed->elf_backend_name_local_section_symbols (abfd));
5606
079e9a2f
AM		 5607 syms = bfd_get_outsymbols (abfd);
5608 for (idx = 0; idx < symcount; idx++)
252b5132 5609 {
252b5132 5610 Elf_Internal_Sym sym;
079e9a2f
AM		 5611 bfd_vma value = syms[idx]->value;
5612 elf_symbol_type *type_ptr;
5613 flagword flags = syms[idx]->flags;
5614 int type;
252b5132 5615
174fd7f9
RS		 5616 if (!name_local_sections
5617 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
079e9a2f
AM		 5618 {
5619 /* Local section symbols have no name. */
5620 sym.st_name = 0;
5621 }
5622 else
5623 {
5624 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5625 syms[idx]->name,
b34976b6 5626 TRUE, FALSE);
079e9a2f 5627 if (sym.st_name == (unsigned long) -1)
5ed6aba4
NC		 5628 {
5629 _bfd_stringtab_free (stt);
5630 return FALSE;
5631 }
079e9a2f 5632 }
252b5132 5633
079e9a2f 5634 type_ptr = elf_symbol_from (abfd, syms[idx]);
252b5132 5635
079e9a2f
AM		 5636 if ((flags & BSF_SECTION_SYM) == 0
5637 && bfd_is_com_section (syms[idx]->section))
5638 {
5639 /* ELF common symbols put the alignment into the `value' field,
5640 and the size into the `size' field. This is backwards from
5641 how BFD handles it, so reverse it here. */
5642 sym.st_size = value;
5643 if (type_ptr == NULL
5644 || type_ptr->internal_elf_sym.st_value == 0)
5645 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5646 else
5647 sym.st_value = type_ptr->internal_elf_sym.st_value;
5648 sym.st_shndx = _bfd_elf_section_from_bfd_section
5649 (abfd, syms[idx]->section);
5650 }
5651 else
5652 {
5653 asection *sec = syms[idx]->section;
5654 int shndx;
252b5132 5655
079e9a2f
AM		 5656 if (sec->output_section)
5657 {
5658 value += sec->output_offset;
5659 sec = sec->output_section;
5660 }
589e6347 5661
079e9a2f
AM		 5662 /* Don't add in the section vma for relocatable output. */
5663 if (! relocatable_p)
5664 value += sec->vma;
5665 sym.st_value = value;
5666 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5667
5668 if (bfd_is_abs_section (sec)
5669 && type_ptr != NULL
5670 && type_ptr->internal_elf_sym.st_shndx != 0)
5671 {
5672 /* This symbol is in a real ELF section which we did
5673 not create as a BFD section. Undo the mapping done
5674 by copy_private_symbol_data. */
5675 shndx = type_ptr->internal_elf_sym.st_shndx;
5676 switch (shndx)
5677 {
5678 case MAP_ONESYMTAB:
5679 shndx = elf_onesymtab (abfd);
5680 break;
5681 case MAP_DYNSYMTAB:
5682 shndx = elf_dynsymtab (abfd);
5683 break;
5684 case MAP_STRTAB:
5685 shndx = elf_tdata (abfd)->strtab_section;
5686 break;
5687 case MAP_SHSTRTAB:
5688 shndx = elf_tdata (abfd)->shstrtab_section;
5689 break;
9ad5cbcf
AM		 5690 case MAP_SYM_SHNDX:
5691 shndx = elf_tdata (abfd)->symtab_shndx_section;
5692 break;
079e9a2f
AM		 5693 default:
5694 break;
5695 }
5696 }
5697 else
5698 {
5699 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
252b5132 5700
079e9a2f
AM		 5701 if (shndx == -1)
5702 {
5703 asection *sec2;
5704
5705 /* Writing this would be a hell of a lot easier if
5706 we had some decent documentation on bfd, and
5707 knew what to expect of the library, and what to
5708 demand of applications. For example, it
5709 appears that `objcopy' might not set the
5710 section of a symbol to be a section that is
5711 actually in the output file. */
5712 sec2 = bfd_get_section_by_name (abfd, sec->name);
589e6347
NC		 5713 if (sec2 == NULL)
5714 {
5715 _bfd_error_handler (_("\
5716Unable to find equivalent output section for symbol '%s' from section '%s'"),
5717 syms[idx]->name ? syms[idx]->name : "<Local sym>",
5718 sec->name);
811072d8 5719 bfd_set_error (bfd_error_invalid_operation);
5ed6aba4 5720 _bfd_stringtab_free (stt);
589e6347
NC		 5721 return FALSE;
5722 }
811072d8 5723
079e9a2f
AM		 5724 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5725 BFD_ASSERT (shndx != -1);
5726 }
5727 }
252b5132 5728
079e9a2f
AM		 5729 sym.st_shndx = shndx;
5730 }
252b5132 5731
13ae64f3
JJ		 5732 if ((flags & BSF_THREAD_LOCAL) != 0)
5733 type = STT_TLS;
5734 else if ((flags & BSF_FUNCTION) != 0)
079e9a2f
AM		 5735 type = STT_FUNC;
5736 else if ((flags & BSF_OBJECT) != 0)
5737 type = STT_OBJECT;
5738 else
5739 type = STT_NOTYPE;
252b5132 5740
13ae64f3
JJ		 5741 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
5742 type = STT_TLS;
5743
589e6347 5744 /* Processor-specific types. */
079e9a2f
AM		 5745 if (type_ptr != NULL
5746 && bed->elf_backend_get_symbol_type)
5747 type = ((*bed->elf_backend_get_symbol_type)
5748 (&type_ptr->internal_elf_sym, type));
252b5132 5749
079e9a2f
AM		 5750 if (flags & BSF_SECTION_SYM)
5751 {
5752 if (flags & BSF_GLOBAL)
5753 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
5754 else
5755 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
5756 }
5757 else if (bfd_is_com_section (syms[idx]->section))
5758 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
5759 else if (bfd_is_und_section (syms[idx]->section))
5760 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
5761 ? STB_WEAK
5762 : STB_GLOBAL),
5763 type);
5764 else if (flags & BSF_FILE)
5765 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
5766 else
5767 {
5768 int bind = STB_LOCAL;
252b5132 5769
079e9a2f
AM		 5770 if (flags & BSF_LOCAL)
5771 bind = STB_LOCAL;
5772 else if (flags & BSF_WEAK)
5773 bind = STB_WEAK;
5774 else if (flags & BSF_GLOBAL)
5775 bind = STB_GLOBAL;
252b5132 5776
079e9a2f
AM		 5777 sym.st_info = ELF_ST_INFO (bind, type);
5778 }
252b5132 5779
079e9a2f
AM		 5780 if (type_ptr != NULL)
5781 sym.st_other = type_ptr->internal_elf_sym.st_other;
5782 else
5783 sym.st_other = 0;
252b5132 5784
9ad5cbcf 5785 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
079e9a2f 5786 outbound_syms += bed->s->sizeof_sym;
9ad5cbcf
AM		 5787 if (outbound_shndx != NULL)
5788 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
079e9a2f 5789 }
252b5132 5790
079e9a2f
AM		 5791 *sttp = stt;
5792 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
5793 symstrtab_hdr->sh_type = SHT_STRTAB;
252b5132 5794
079e9a2f
AM		 5795 symstrtab_hdr->sh_flags = 0;
5796 symstrtab_hdr->sh_addr = 0;
5797 symstrtab_hdr->sh_entsize = 0;
5798 symstrtab_hdr->sh_link = 0;
5799 symstrtab_hdr->sh_info = 0;
5800 symstrtab_hdr->sh_addralign = 1;
252b5132 5801
b34976b6 5802 return TRUE;
252b5132
RH		 5803}
5804
5805/* Return the number of bytes required to hold the symtab vector.
5806
5807 Note that we base it on the count plus 1, since we will null terminate
5808 the vector allocated based on this size. However, the ELF symbol table
5809 always has a dummy entry as symbol #0, so it ends up even. */
5810
5811long
217aa764 5812_bfd_elf_get_symtab_upper_bound (bfd *abfd)
252b5132
RH		 5813{
5814 long symcount;
5815 long symtab_size;
5816 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
5817
5818 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
b99d1833
AM		 5819 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5820 if (symcount > 0)
5821 symtab_size -= sizeof (asymbol *);
252b5132
RH		 5822
5823 return symtab_size;
5824}
5825
5826long
217aa764 5827_bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
252b5132
RH		 5828{
5829 long symcount;
5830 long symtab_size;
5831 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
5832
5833 if (elf_dynsymtab (abfd) == 0)
5834 {
5835 bfd_set_error (bfd_error_invalid_operation);
5836 return -1;
5837 }
5838
5839 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
b99d1833
AM		 5840 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5841 if (symcount > 0)
5842 symtab_size -= sizeof (asymbol *);
252b5132
RH		 5843
5844 return symtab_size;
5845}
5846
5847long
217aa764
AM		 5848_bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
5849 sec_ptr asect)
252b5132
RH		 5850{
5851 return (asect->reloc_count + 1) * sizeof (arelent *);
5852}
5853
5854/* Canonicalize the relocs. */
5855
5856long
217aa764
AM		 5857_bfd_elf_canonicalize_reloc (bfd *abfd,
5858 sec_ptr section,
5859 arelent **relptr,
5860 asymbol **symbols)
252b5132
RH		 5861{
5862 arelent *tblptr;
5863 unsigned int i;
9c5bfbb7 5864 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
252b5132 5865
b34976b6 5866 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
252b5132
RH		 5867 return -1;
5868
5869 tblptr = section->relocation;
5870 for (i = 0; i < section->reloc_count; i++)
5871 *relptr++ = tblptr++;
5872
5873 *relptr = NULL;
5874
5875 return section->reloc_count;
5876}
5877
5878long
6cee3f79 5879_bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
252b5132 5880{
9c5bfbb7 5881 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
217aa764 5882 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
252b5132
RH		 5883
5884 if (symcount >= 0)
5885 bfd_get_symcount (abfd) = symcount;
5886 return symcount;
5887}
5888
5889long
217aa764
AM		 5890_bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
5891 asymbol **allocation)
252b5132 5892{
9c5bfbb7 5893 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
217aa764 5894 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
1f70368c
DJ		 5895
5896 if (symcount >= 0)
5897 bfd_get_dynamic_symcount (abfd) = symcount;
5898 return symcount;
252b5132
RH		 5899}
5900
5901/* Return the size required for the dynamic reloc entries. Any
5902 section that was actually installed in the BFD, and has type
5903 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5904 considered to be a dynamic reloc section. */
5905
5906long
217aa764 5907_bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
252b5132
RH		 5908{
5909 long ret;
5910 asection *s;
5911
5912 if (elf_dynsymtab (abfd) == 0)
5913 {
5914 bfd_set_error (bfd_error_invalid_operation);
5915 return -1;
5916 }
5917
5918 ret = sizeof (arelent *);
5919 for (s = abfd->sections; s != NULL; s = s->next)
5920 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5921 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5922 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
eea6121a 5923 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
252b5132
RH		 5924 * sizeof (arelent *));
5925
5926 return ret;
5927}
5928
5929/* Canonicalize the dynamic relocation entries. Note that we return
5930 the dynamic relocations as a single block, although they are
5931 actually associated with particular sections; the interface, which
5932 was designed for SunOS style shared libraries, expects that there
5933 is only one set of dynamic relocs. Any section that was actually
5934 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5935 the dynamic symbol table, is considered to be a dynamic reloc
5936 section. */
5937
5938long
217aa764
AM		 5939_bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
5940 arelent **storage,
5941 asymbol **syms)
252b5132 5942{
217aa764 5943 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
252b5132
RH		 5944 asection *s;
5945 long ret;
5946
5947 if (elf_dynsymtab (abfd) == 0)
5948 {
5949 bfd_set_error (bfd_error_invalid_operation);
5950 return -1;
5951 }
5952
5953 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5954 ret = 0;
5955 for (s = abfd->sections; s != NULL; s = s->next)
5956 {
5957 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5958 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5959 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5960 {
5961 arelent *p;
5962 long count, i;
5963
b34976b6 5964 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
252b5132 5965 return -1;
eea6121a 5966 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
252b5132
RH		 5967 p = s->relocation;
5968 for (i = 0; i < count; i++)
5969 *storage++ = p++;
5970 ret += count;
5971 }
5972 }
5973
5974 *storage = NULL;
5975
5976 return ret;
5977}
5978\f
5979/* Read in the version information. */
5980
b34976b6 5981bfd_boolean
217aa764 5982_bfd_elf_slurp_version_tables (bfd *abfd)
252b5132
RH		 5983{
5984 bfd_byte *contents = NULL;
dc810e39 5985 bfd_size_type amt;
252b5132
RH		 5986
5987 if (elf_dynverdef (abfd) != 0)
5988 {
5989 Elf_Internal_Shdr *hdr;
5990 Elf_External_Verdef *everdef;
5991 Elf_Internal_Verdef *iverdef;
f631889e
UD		 5992 Elf_Internal_Verdef *iverdefarr;
5993 Elf_Internal_Verdef iverdefmem;
252b5132 5994 unsigned int i;
062e2358 5995 unsigned int maxidx;
252b5132
RH		 5996
5997 hdr = &elf_tdata (abfd)->dynverdef_hdr;
5998
217aa764 5999 contents = bfd_malloc (hdr->sh_size);
252b5132
RH		 6000 if (contents == NULL)
6001 goto error_return;
6002 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
217aa764 6003 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
252b5132
RH		 6004 goto error_return;
6005
f631889e
UD		 6006 /* We know the number of entries in the section but not the maximum
6007 index. Therefore we have to run through all entries and find
6008 the maximum. */
252b5132 6009 everdef = (Elf_External_Verdef *) contents;
f631889e
UD		 6010 maxidx = 0;
6011 for (i = 0; i < hdr->sh_info; ++i)
6012 {
6013 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6014
062e2358
AM		 6015 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6016 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
f631889e
UD		 6017
6018 everdef = ((Elf_External_Verdef *)
6019 ((bfd_byte *) everdef + iverdefmem.vd_next));
6020 }
6021
dc810e39 6022 amt = (bfd_size_type) maxidx * sizeof (Elf_Internal_Verdef);
217aa764 6023 elf_tdata (abfd)->verdef = bfd_zalloc (abfd, amt);
f631889e
UD		 6024 if (elf_tdata (abfd)->verdef == NULL)
6025 goto error_return;
6026
6027 elf_tdata (abfd)->cverdefs = maxidx;
6028
6029 everdef = (Elf_External_Verdef *) contents;
6030 iverdefarr = elf_tdata (abfd)->verdef;
6031 for (i = 0; i < hdr->sh_info; i++)
252b5132
RH		 6032 {
6033 Elf_External_Verdaux *everdaux;
6034 Elf_Internal_Verdaux *iverdaux;
6035 unsigned int j;
6036
f631889e
UD		 6037 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6038
6039 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6040 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
252b5132
RH		 6041
6042 iverdef->vd_bfd = abfd;
6043
dc810e39 6044 amt = (bfd_size_type) iverdef->vd_cnt * sizeof (Elf_Internal_Verdaux);
217aa764 6045 iverdef->vd_auxptr = bfd_alloc (abfd, amt);
252b5132
RH		 6046 if (iverdef->vd_auxptr == NULL)
6047 goto error_return;
6048
6049 everdaux = ((Elf_External_Verdaux *)
6050 ((bfd_byte *) everdef + iverdef->vd_aux));
6051 iverdaux = iverdef->vd_auxptr;
6052 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6053 {
6054 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6055
6056 iverdaux->vda_nodename =
6057 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6058 iverdaux->vda_name);
6059 if (iverdaux->vda_nodename == NULL)
6060 goto error_return;
6061
6062 if (j + 1 < iverdef->vd_cnt)
6063 iverdaux->vda_nextptr = iverdaux + 1;
6064 else
6065 iverdaux->vda_nextptr = NULL;
6066
6067 everdaux = ((Elf_External_Verdaux *)
6068 ((bfd_byte *) everdaux + iverdaux->vda_next));
6069 }
6070
6071 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6072
6073 if (i + 1 < hdr->sh_info)
6074 iverdef->vd_nextdef = iverdef + 1;
6075 else
6076 iverdef->vd_nextdef = NULL;
6077
6078 everdef = ((Elf_External_Verdef *)
6079 ((bfd_byte *) everdef + iverdef->vd_next));
6080 }
6081
6082 free (contents);
6083 contents = NULL;
6084 }
6085
6086 if (elf_dynverref (abfd) != 0)
6087 {
6088 Elf_Internal_Shdr *hdr;
6089 Elf_External_Verneed *everneed;
6090 Elf_Internal_Verneed *iverneed;
6091 unsigned int i;
6092
6093 hdr = &elf_tdata (abfd)->dynverref_hdr;
6094
dc810e39 6095 amt = (bfd_size_type) hdr->sh_info * sizeof (Elf_Internal_Verneed);
217aa764 6096 elf_tdata (abfd)->verref = bfd_zalloc (abfd, amt);
252b5132
RH		 6097 if (elf_tdata (abfd)->verref == NULL)
6098 goto error_return;
6099
6100 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6101
217aa764 6102 contents = bfd_malloc (hdr->sh_size);
252b5132
RH		 6103 if (contents == NULL)
6104 goto error_return;
6105 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
217aa764 6106 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
252b5132
RH		 6107 goto error_return;
6108
6109 everneed = (Elf_External_Verneed *) contents;
6110 iverneed = elf_tdata (abfd)->verref;
6111 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6112 {
6113 Elf_External_Vernaux *evernaux;
6114 Elf_Internal_Vernaux *ivernaux;
6115 unsigned int j;
6116
6117 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6118
6119 iverneed->vn_bfd = abfd;
6120
6121 iverneed->vn_filename =
6122 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6123 iverneed->vn_file);
6124 if (iverneed->vn_filename == NULL)
6125 goto error_return;
6126
dc810e39
AM		 6127 amt = iverneed->vn_cnt;
6128 amt *= sizeof (Elf_Internal_Vernaux);
217aa764 6129 iverneed->vn_auxptr = bfd_alloc (abfd, amt);
252b5132
RH		 6130
6131 evernaux = ((Elf_External_Vernaux *)
6132 ((bfd_byte *) everneed + iverneed->vn_aux));
6133 ivernaux = iverneed->vn_auxptr;
6134 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6135 {
6136 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6137
6138 ivernaux->vna_nodename =
6139 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6140 ivernaux->vna_name);
6141 if (ivernaux->vna_nodename == NULL)
6142 goto error_return;
6143
6144 if (j + 1 < iverneed->vn_cnt)
6145 ivernaux->vna_nextptr = ivernaux + 1;
6146 else
6147 ivernaux->vna_nextptr = NULL;
6148
6149 evernaux = ((Elf_External_Vernaux *)
6150 ((bfd_byte *) evernaux + ivernaux->vna_next));
6151 }
6152
6153 if (i + 1 < hdr->sh_info)
6154 iverneed->vn_nextref = iverneed + 1;
6155 else
6156 iverneed->vn_nextref = NULL;
6157
6158 everneed = ((Elf_External_Verneed *)
6159 ((bfd_byte *) everneed + iverneed->vn_next));
6160 }
6161
6162 free (contents);
6163 contents = NULL;
6164 }
6165
b34976b6 6166 return TRUE;
252b5132
RH		 6167
6168 error_return:
5ed6aba4 6169 if (contents != NULL)
252b5132 6170 free (contents);
b34976b6 6171 return FALSE;
252b5132
RH		 6172}
6173\f
6174asymbol *
217aa764 6175_bfd_elf_make_empty_symbol (bfd *abfd)
252b5132
RH		 6176{
6177 elf_symbol_type *newsym;
dc810e39 6178 bfd_size_type amt = sizeof (elf_symbol_type);
252b5132 6179
217aa764 6180 newsym = bfd_zalloc (abfd, amt);
252b5132
RH		 6181 if (!newsym)
6182 return NULL;
6183 else
6184 {
6185 newsym->symbol.the_bfd = abfd;
6186 return &newsym->symbol;
6187 }
6188}
6189
6190void
217aa764
AM		 6191_bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
6192 asymbol *symbol,
6193 symbol_info *ret)
252b5132
RH		 6194{
6195 bfd_symbol_info (symbol, ret);
6196}
6197
6198/* Return whether a symbol name implies a local symbol. Most targets
6199 use this function for the is_local_label_name entry point, but some
6200 override it. */
6201
b34976b6 6202bfd_boolean
217aa764
AM		 6203_bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
6204 const char *name)
252b5132
RH		 6205{
6206 /* Normal local symbols start with ``.L''. */
6207 if (name[0] == '.' && name[1] == 'L')
b34976b6 6208 return TRUE;
252b5132
RH		 6209
6210 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6211 DWARF debugging symbols starting with ``..''. */
6212 if (name[0] == '.' && name[1] == '.')
b34976b6 6213 return TRUE;
252b5132
RH		 6214
6215 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6216 emitting DWARF debugging output. I suspect this is actually a
6217 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6218 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6219 underscore to be emitted on some ELF targets). For ease of use,
6220 we treat such symbols as local. */
6221 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
b34976b6 6222 return TRUE;
252b5132 6223
b34976b6 6224 return FALSE;
252b5132
RH		 6225}
6226
6227alent *
217aa764
AM		 6228_bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6229 asymbol *symbol ATTRIBUTE_UNUSED)
252b5132
RH		 6230{
6231 abort ();
6232 return NULL;
6233}
6234
b34976b6 6235bfd_boolean
217aa764
AM		 6236_bfd_elf_set_arch_mach (bfd *abfd,
6237 enum bfd_architecture arch,
6238 unsigned long machine)
252b5132
RH		 6239{
6240 /* If this isn't the right architecture for this backend, and this
6241 isn't the generic backend, fail. */
6242 if (arch != get_elf_backend_data (abfd)->arch
6243 && arch != bfd_arch_unknown
6244 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
b34976b6 6245 return FALSE;
252b5132
RH		 6246
6247 return bfd_default_set_arch_mach (abfd, arch, machine);
6248}
6249
d1fad7c6
NC		 6250/* Find the function to a particular section and offset,
6251 for error reporting. */
252b5132 6252
b34976b6 6253static bfd_boolean
217aa764
AM		 6254elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6255 asection *section,
6256 asymbol **symbols,
6257 bfd_vma offset,
6258 const char **filename_ptr,
6259 const char **functionname_ptr)
252b5132 6260{
252b5132
RH		 6261 const char *filename;
6262 asymbol *func;
6263 bfd_vma low_func;
6264 asymbol **p;
6265
252b5132
RH		 6266 filename = NULL;
6267 func = NULL;
6268 low_func = 0;
6269
6270 for (p = symbols; *p != NULL; p++)
6271 {
6272 elf_symbol_type *q;
6273
6274 q = (elf_symbol_type *) *p;
6275
6276 if (bfd_get_section (&q->symbol) != section)
6277 continue;
6278
6279 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6280 {
6281 default:
6282 break;
6283 case STT_FILE:
6284 filename = bfd_asymbol_name (&q->symbol);
6285 break;
6286 case STT_NOTYPE:
6287 case STT_FUNC:
6288 if (q->symbol.section == section
6289 && q->symbol.value >= low_func
6290 && q->symbol.value <= offset)
6291 {
6292 func = (asymbol *) q;
6293 low_func = q->symbol.value;
6294 }
6295 break;
6296 }
6297 }
6298
6299 if (func == NULL)
b34976b6 6300 return FALSE;
252b5132 6301
d1fad7c6
NC		 6302 if (filename_ptr)
6303 *filename_ptr = filename;
6304 if (functionname_ptr)
6305 *functionname_ptr = bfd_asymbol_name (func);
6306
b34976b6 6307 return TRUE;
d1fad7c6
NC		 6308}
6309
6310/* Find the nearest line to a particular section and offset,
6311 for error reporting. */
6312
b34976b6 6313bfd_boolean
217aa764
AM		 6314_bfd_elf_find_nearest_line (bfd *abfd,
6315 asection *section,
6316 asymbol **symbols,
6317 bfd_vma offset,
6318 const char **filename_ptr,
6319 const char **functionname_ptr,
6320 unsigned int *line_ptr)
d1fad7c6 6321{
b34976b6 6322 bfd_boolean found;
d1fad7c6
NC		 6323
6324 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
4e8a9624
AM		 6325 filename_ptr, functionname_ptr,
6326 line_ptr))
d1fad7c6
NC		 6327 {
6328 if (!*functionname_ptr)
4e8a9624
AM		 6329 elf_find_function (abfd, section, symbols, offset,
6330 *filename_ptr ? NULL : filename_ptr,
6331 functionname_ptr);
6332
b34976b6 6333 return TRUE;
d1fad7c6
NC		 6334 }
6335
6336 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
4e8a9624
AM		 6337 filename_ptr, functionname_ptr,
6338 line_ptr, 0,
6339 &elf_tdata (abfd)->dwarf2_find_line_info))
d1fad7c6
NC		 6340 {
6341 if (!*functionname_ptr)
4e8a9624
AM		 6342 elf_find_function (abfd, section, symbols, offset,
6343 *filename_ptr ? NULL : filename_ptr,
6344 functionname_ptr);
6345
b34976b6 6346 return TRUE;
d1fad7c6
NC		 6347 }
6348
6349 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
4e8a9624
AM		 6350 &found, filename_ptr,
6351 functionname_ptr, line_ptr,
6352 &elf_tdata (abfd)->line_info))
b34976b6 6353 return FALSE;
dc43ada5 6354 if (found && (*functionname_ptr || *line_ptr))
b34976b6 6355 return TRUE;
d1fad7c6
NC		 6356
6357 if (symbols == NULL)
b34976b6 6358 return FALSE;
d1fad7c6
NC		 6359
6360 if (! elf_find_function (abfd, section, symbols, offset,
4e8a9624 6361 filename_ptr, functionname_ptr))
b34976b6 6362 return FALSE;
d1fad7c6 6363
252b5132 6364 *line_ptr = 0;
b34976b6 6365 return TRUE;
252b5132
RH		 6366}
6367
6368int
217aa764 6369_bfd_elf_sizeof_headers (bfd *abfd, bfd_boolean reloc)
252b5132
RH		 6370{
6371 int ret;
6372
6373 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
6374 if (! reloc)
6375 ret += get_program_header_size (abfd);
6376 return ret;
6377}
6378
b34976b6 6379bfd_boolean
217aa764
AM		 6380_bfd_elf_set_section_contents (bfd *abfd,
6381 sec_ptr section,
0f867abe 6382 const void *location,
217aa764
AM		 6383 file_ptr offset,
6384 bfd_size_type count)
252b5132
RH		 6385{
6386 Elf_Internal_Shdr *hdr;
dc810e39 6387 bfd_signed_vma pos;
252b5132
RH		 6388
6389 if (! abfd->output_has_begun
217aa764 6390 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
b34976b6 6391 return FALSE;
252b5132
RH		 6392
6393 hdr = &elf_section_data (section)->this_hdr;
dc810e39
AM		 6394 pos = hdr->sh_offset + offset;
6395 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6396 || bfd_bwrite (location, count, abfd) != count)
b34976b6 6397 return FALSE;
252b5132 6398
b34976b6 6399 return TRUE;
252b5132
RH		 6400}
6401
6402void
217aa764
AM		 6403_bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
6404 arelent *cache_ptr ATTRIBUTE_UNUSED,
6405 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
252b5132
RH		 6406{
6407 abort ();
6408}
6409
252b5132
RH		 6410/* Try to convert a non-ELF reloc into an ELF one. */
6411
b34976b6 6412bfd_boolean
217aa764 6413_bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
252b5132 6414{
c044fabd 6415 /* Check whether we really have an ELF howto. */
252b5132
RH		 6416
6417 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6418 {
6419 bfd_reloc_code_real_type code;
6420 reloc_howto_type *howto;
6421
6422 /* Alien reloc: Try to determine its type to replace it with an
c044fabd 6423 equivalent ELF reloc. */
252b5132
RH		 6424
6425 if (areloc->howto->pc_relative)
6426 {
6427 switch (areloc->howto->bitsize)
6428 {
6429 case 8:
6430 code = BFD_RELOC_8_PCREL;
6431 break;
6432 case 12:
6433 code = BFD_RELOC_12_PCREL;
6434 break;
6435 case 16:
6436 code = BFD_RELOC_16_PCREL;
6437 break;
6438 case 24:
6439 code = BFD_RELOC_24_PCREL;
6440 break;
6441 case 32:
6442 code = BFD_RELOC_32_PCREL;
6443 break;
6444 case 64:
6445 code = BFD_RELOC_64_PCREL;
6446 break;
6447 default:
6448 goto fail;
6449 }
6450
6451 howto = bfd_reloc_type_lookup (abfd, code);
6452
6453 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6454 {
6455 if (howto->pcrel_offset)
6456 areloc->addend += areloc->address;
6457 else
6458 areloc->addend -= areloc->address; /* addend is unsigned!! */
6459 }
6460 }
6461 else
6462 {
6463 switch (areloc->howto->bitsize)
6464 {
6465 case 8:
6466 code = BFD_RELOC_8;
6467 break;
6468 case 14:
6469 code = BFD_RELOC_14;
6470 break;
6471 case 16:
6472 code = BFD_RELOC_16;
6473 break;
6474 case 26:
6475 code = BFD_RELOC_26;
6476 break;
6477 case 32:
6478 code = BFD_RELOC_32;
6479 break;
6480 case 64:
6481 code = BFD_RELOC_64;
6482 break;
6483 default:
6484 goto fail;
6485 }
6486
6487 howto = bfd_reloc_type_lookup (abfd, code);
6488 }
6489
6490 if (howto)
6491 areloc->howto = howto;
6492 else
6493 goto fail;
6494 }
6495
b34976b6 6496 return TRUE;
252b5132
RH		 6497
6498 fail:
6499 (*_bfd_error_handler)
d003868e
AM		 6500 (_("%B: unsupported relocation type %s"),
6501 abfd, areloc->howto->name);
252b5132 6502 bfd_set_error (bfd_error_bad_value);
b34976b6 6503 return FALSE;
252b5132
RH		 6504}
6505
b34976b6 6506bfd_boolean
217aa764 6507_bfd_elf_close_and_cleanup (bfd *abfd)
252b5132
RH		 6508{
6509 if (bfd_get_format (abfd) == bfd_object)
6510 {
6511 if (elf_shstrtab (abfd) != NULL)
2b0f7ef9 6512 _bfd_elf_strtab_free (elf_shstrtab (abfd));
252b5132
RH		 6513 }
6514
6515 return _bfd_generic_close_and_cleanup (abfd);
6516}
6517
6518/* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6519 in the relocation's offset. Thus we cannot allow any sort of sanity
6520 range-checking to interfere. There is nothing else to do in processing
6521 this reloc. */
6522
6523bfd_reloc_status_type
217aa764
AM		 6524_bfd_elf_rel_vtable_reloc_fn
6525 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
fc0a2244 6526 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
217aa764
AM		 6527 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
6528 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
252b5132
RH		 6529{
6530 return bfd_reloc_ok;
6531}
252b5132
RH		 6532\f
6533/* Elf core file support. Much of this only works on native
6534 toolchains, since we rely on knowing the
6535 machine-dependent procfs structure in order to pick
c044fabd 6536 out details about the corefile. */
252b5132
RH		 6537
6538#ifdef HAVE_SYS_PROCFS_H
6539# include <sys/procfs.h>
6540#endif
6541
c044fabd 6542/* FIXME: this is kinda wrong, but it's what gdb wants. */
252b5132
RH		 6543
6544static int
217aa764 6545elfcore_make_pid (bfd *abfd)
252b5132
RH		 6546{
6547 return ((elf_tdata (abfd)->core_lwpid << 16)
6548 + (elf_tdata (abfd)->core_pid));
6549}
6550
252b5132
RH		 6551/* If there isn't a section called NAME, make one, using
6552 data from SECT. Note, this function will generate a
6553 reference to NAME, so you shouldn't deallocate or
c044fabd 6554 overwrite it. */
252b5132 6555
b34976b6 6556static bfd_boolean
217aa764 6557elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
252b5132 6558{
c044fabd 6559 asection *sect2;
252b5132
RH		 6560
6561 if (bfd_get_section_by_name (abfd, name) != NULL)
b34976b6 6562 return TRUE;
252b5132
RH		 6563
6564 sect2 = bfd_make_section (abfd, name);
6565 if (sect2 == NULL)
b34976b6 6566 return FALSE;
252b5132 6567
eea6121a 6568 sect2->size = sect->size;
252b5132
RH		 6569 sect2->filepos = sect->filepos;
6570 sect2->flags = sect->flags;
6571 sect2->alignment_power = sect->alignment_power;
b34976b6 6572 return TRUE;
252b5132
RH		 6573}
6574
bb0082d6
AM		 6575/* Create a pseudosection containing SIZE bytes at FILEPOS. This
6576 actually creates up to two pseudosections:
6577 - For the single-threaded case, a section named NAME, unless
6578 such a section already exists.
6579 - For the multi-threaded case, a section named "NAME/PID", where
6580 PID is elfcore_make_pid (abfd).
6581 Both pseudosections have identical contents. */
b34976b6 6582bfd_boolean
217aa764
AM		 6583_bfd_elfcore_make_pseudosection (bfd *abfd,
6584 char *name,
6585 size_t size,
6586 ufile_ptr filepos)
bb0082d6
AM		 6587{
6588 char buf[100];
6589 char *threaded_name;
d4c88bbb 6590 size_t len;
bb0082d6
AM		 6591 asection *sect;
6592
6593 /* Build the section name. */
6594
6595 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
d4c88bbb 6596 len = strlen (buf) + 1;
217aa764 6597 threaded_name = bfd_alloc (abfd, len);
bb0082d6 6598 if (threaded_name == NULL)
b34976b6 6599 return FALSE;
d4c88bbb 6600 memcpy (threaded_name, buf, len);
bb0082d6 6601
62f3bb11 6602 sect = bfd_make_section_anyway (abfd, threaded_name);
bb0082d6 6603 if (sect == NULL)
b34976b6 6604 return FALSE;
eea6121a 6605 sect->size = size;
bb0082d6
AM		 6606 sect->filepos = filepos;
6607 sect->flags = SEC_HAS_CONTENTS;
6608 sect->alignment_power = 2;
6609
936e320b 6610 return elfcore_maybe_make_sect (abfd, name, sect);
bb0082d6
AM		 6611}
6612
252b5132 6613/* prstatus_t exists on:
4a938328 6614 solaris 2.5+
252b5132
RH		 6615 linux 2.[01] + glibc
6616 unixware 4.2
6617*/
6618
6619#if defined (HAVE_PRSTATUS_T)
a7b97311 6620
b34976b6 6621static bfd_boolean
217aa764 6622elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
252b5132 6623{
eea6121a 6624 size_t size;
7ee38065 6625 int offset;
252b5132 6626
4a938328
MS		 6627 if (note->descsz == sizeof (prstatus_t))
6628 {
6629 prstatus_t prstat;
252b5132 6630
eea6121a 6631 size = sizeof (prstat.pr_reg);
7ee38065 6632 offset = offsetof (prstatus_t, pr_reg);
4a938328 6633 memcpy (&prstat, note->descdata, sizeof (prstat));
252b5132 6634
fa49d224
NC		 6635 /* Do not overwrite the core signal if it
6636 has already been set by another thread. */
6637 if (elf_tdata (abfd)->core_signal == 0)
6638 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
4a938328 6639 elf_tdata (abfd)->core_pid = prstat.pr_pid;
252b5132 6640
4a938328
MS		 6641 /* pr_who exists on:
6642 solaris 2.5+
6643 unixware 4.2
6644 pr_who doesn't exist on:
6645 linux 2.[01]
6646 */
252b5132 6647#if defined (HAVE_PRSTATUS_T_PR_WHO)
4a938328 6648 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
252b5132 6649#endif
4a938328 6650 }
7ee38065 6651#if defined (HAVE_PRSTATUS32_T)
4a938328
MS		 6652 else if (note->descsz == sizeof (prstatus32_t))
6653 {
6654 /* 64-bit host, 32-bit corefile */
6655 prstatus32_t prstat;
6656
eea6121a 6657 size = sizeof (prstat.pr_reg);
7ee38065 6658 offset = offsetof (prstatus32_t, pr_reg);
4a938328
MS		 6659 memcpy (&prstat, note->descdata, sizeof (prstat));
6660
fa49d224
NC		 6661 /* Do not overwrite the core signal if it
6662 has already been set by another thread. */
6663 if (elf_tdata (abfd)->core_signal == 0)
6664 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
4a938328
MS		 6665 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6666
6667 /* pr_who exists on:
6668 solaris 2.5+
6669 unixware 4.2
6670 pr_who doesn't exist on:
6671 linux 2.[01]
6672 */
7ee38065 6673#if defined (HAVE_PRSTATUS32_T_PR_WHO)
4a938328
MS		 6674 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6675#endif
6676 }
7ee38065 6677#endif /* HAVE_PRSTATUS32_T */
4a938328
MS		 6678 else
6679 {
6680 /* Fail - we don't know how to handle any other
6681 note size (ie. data object type). */
b34976b6 6682 return TRUE;
4a938328 6683 }
252b5132 6684
bb0082d6 6685 /* Make a ".reg/999" section and a ".reg" section. */
936e320b 6686 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 6687 size, note->descpos + offset);
252b5132
RH		 6688}
6689#endif /* defined (HAVE_PRSTATUS_T) */
6690
bb0082d6 6691/* Create a pseudosection containing the exact contents of NOTE. */
b34976b6 6692static bfd_boolean
217aa764
AM		 6693elfcore_make_note_pseudosection (bfd *abfd,
6694 char *name,
6695 Elf_Internal_Note *note)
252b5132 6696{
936e320b
AM		 6697 return _bfd_elfcore_make_pseudosection (abfd, name,
6698 note->descsz, note->descpos);
252b5132
RH		 6699}
6700
ff08c6bb
JB		 6701/* There isn't a consistent prfpregset_t across platforms,
6702 but it doesn't matter, because we don't have to pick this
c044fabd
KH		 6703 data structure apart. */
6704
b34976b6 6705static bfd_boolean
217aa764 6706elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
ff08c6bb
JB		 6707{
6708 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6709}
6710
ff08c6bb
JB		 6711/* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6712 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6713 literally. */
c044fabd 6714
b34976b6 6715static bfd_boolean
217aa764 6716elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
ff08c6bb
JB		 6717{
6718 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
6719}
6720
252b5132 6721#if defined (HAVE_PRPSINFO_T)
4a938328 6722typedef prpsinfo_t elfcore_psinfo_t;
7ee38065 6723#if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
4a938328
MS		 6724typedef prpsinfo32_t elfcore_psinfo32_t;
6725#endif
252b5132
RH		 6726#endif
6727
6728#if defined (HAVE_PSINFO_T)
4a938328 6729typedef psinfo_t elfcore_psinfo_t;
7ee38065 6730#if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
4a938328
MS		 6731typedef psinfo32_t elfcore_psinfo32_t;
6732#endif
252b5132
RH		 6733#endif
6734
252b5132
RH		 6735/* return a malloc'ed copy of a string at START which is at
6736 most MAX bytes long, possibly without a terminating '\0'.
c044fabd 6737 the copy will always have a terminating '\0'. */
252b5132 6738
936e320b 6739char *
217aa764 6740_bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
252b5132 6741{
dc810e39 6742 char *dups;
c044fabd 6743 char *end = memchr (start, '\0', max);
dc810e39 6744 size_t len;
252b5132
RH		 6745
6746 if (end == NULL)
6747 len = max;
6748 else
6749 len = end - start;
6750
217aa764 6751 dups = bfd_alloc (abfd, len + 1);
dc810e39 6752 if (dups == NULL)
252b5132
RH		 6753 return NULL;
6754
dc810e39
AM		 6755 memcpy (dups, start, len);
6756 dups[len] = '\0';
252b5132 6757
dc810e39 6758 return dups;
252b5132
RH		 6759}
6760
bb0082d6 6761#if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
b34976b6 6762static bfd_boolean
217aa764 6763elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
252b5132 6764{
4a938328
MS		 6765 if (note->descsz == sizeof (elfcore_psinfo_t))
6766 {
6767 elfcore_psinfo_t psinfo;
252b5132 6768
7ee38065 6769 memcpy (&psinfo, note->descdata, sizeof (psinfo));
252b5132 6770
4a938328 6771 elf_tdata (abfd)->core_program
936e320b
AM		 6772 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6773 sizeof (psinfo.pr_fname));
252b5132 6774
4a938328 6775 elf_tdata (abfd)->core_command
936e320b
AM		 6776 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6777 sizeof (psinfo.pr_psargs));
4a938328 6778 }
7ee38065 6779#if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
4a938328
MS		 6780 else if (note->descsz == sizeof (elfcore_psinfo32_t))
6781 {
6782 /* 64-bit host, 32-bit corefile */
6783 elfcore_psinfo32_t psinfo;
6784
7ee38065 6785 memcpy (&psinfo, note->descdata, sizeof (psinfo));
252b5132 6786
4a938328 6787 elf_tdata (abfd)->core_program
936e320b
AM		 6788 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6789 sizeof (psinfo.pr_fname));
4a938328
MS		 6790
6791 elf_tdata (abfd)->core_command
936e320b
AM		 6792 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6793 sizeof (psinfo.pr_psargs));
4a938328
MS		 6794 }
6795#endif
6796
6797 else
6798 {
6799 /* Fail - we don't know how to handle any other
6800 note size (ie. data object type). */
b34976b6 6801 return TRUE;
4a938328 6802 }
252b5132
RH		 6803
6804 /* Note that for some reason, a spurious space is tacked
6805 onto the end of the args in some (at least one anyway)
c044fabd 6806 implementations, so strip it off if it exists. */
252b5132
RH		 6807
6808 {
c044fabd 6809 char *command = elf_tdata (abfd)->core_command;
252b5132
RH		 6810 int n = strlen (command);
6811
6812 if (0 < n && command[n - 1] == ' ')
6813 command[n - 1] = '\0';
6814 }
6815
b34976b6 6816 return TRUE;
252b5132
RH		 6817}
6818#endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6819
252b5132 6820#if defined (HAVE_PSTATUS_T)
b34976b6 6821static bfd_boolean
217aa764 6822elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
252b5132 6823{
f572a39d
AM		 6824 if (note->descsz == sizeof (pstatus_t)
6825#if defined (HAVE_PXSTATUS_T)
6826 || note->descsz == sizeof (pxstatus_t)
6827#endif
6828 )
4a938328
MS		 6829 {
6830 pstatus_t pstat;
252b5132 6831
4a938328 6832 memcpy (&pstat, note->descdata, sizeof (pstat));
252b5132 6833
4a938328
MS		 6834 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6835 }
7ee38065 6836#if defined (HAVE_PSTATUS32_T)
4a938328
MS		 6837 else if (note->descsz == sizeof (pstatus32_t))
6838 {
6839 /* 64-bit host, 32-bit corefile */
6840 pstatus32_t pstat;
252b5132 6841
4a938328 6842 memcpy (&pstat, note->descdata, sizeof (pstat));
252b5132 6843
4a938328
MS		 6844 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6845 }
6846#endif
252b5132
RH		 6847 /* Could grab some more details from the "representative"
6848 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
c044fabd 6849 NT_LWPSTATUS note, presumably. */
252b5132 6850
b34976b6 6851 return TRUE;
252b5132
RH		 6852}
6853#endif /* defined (HAVE_PSTATUS_T) */
6854
252b5132 6855#if defined (HAVE_LWPSTATUS_T)
b34976b6 6856static bfd_boolean
217aa764 6857elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
252b5132
RH		 6858{
6859 lwpstatus_t lwpstat;
6860 char buf[100];
c044fabd 6861 char *name;
d4c88bbb 6862 size_t len;
c044fabd 6863 asection *sect;
252b5132 6864
f572a39d
AM		 6865 if (note->descsz != sizeof (lwpstat)
6866#if defined (HAVE_LWPXSTATUS_T)
6867 && note->descsz != sizeof (lwpxstatus_t)
6868#endif
6869 )
b34976b6 6870 return TRUE;
252b5132
RH		 6871
6872 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
6873
6874 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
6875 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
6876
c044fabd 6877 /* Make a ".reg/999" section. */
252b5132
RH		 6878
6879 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
d4c88bbb 6880 len = strlen (buf) + 1;
217aa764 6881 name = bfd_alloc (abfd, len);
252b5132 6882 if (name == NULL)
b34976b6 6883 return FALSE;
d4c88bbb 6884 memcpy (name, buf, len);
252b5132 6885
62f3bb11 6886 sect = bfd_make_section_anyway (abfd, name);
252b5132 6887 if (sect == NULL)
b34976b6 6888 return FALSE;
252b5132
RH		 6889
6890#if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
eea6121a 6891 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
252b5132
RH		 6892 sect->filepos = note->descpos
6893 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
6894#endif
6895
6896#if defined (HAVE_LWPSTATUS_T_PR_REG)
eea6121a 6897 sect->size = sizeof (lwpstat.pr_reg);
252b5132
RH		 6898 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
6899#endif
6900
6901 sect->flags = SEC_HAS_CONTENTS;
6902 sect->alignment_power = 2;
6903
6904 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
b34976b6 6905 return FALSE;
252b5132
RH		 6906
6907 /* Make a ".reg2/999" section */
6908
6909 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
d4c88bbb 6910 len = strlen (buf) + 1;
217aa764 6911 name = bfd_alloc (abfd, len);
252b5132 6912 if (name == NULL)
b34976b6 6913 return FALSE;
d4c88bbb 6914 memcpy (name, buf, len);
252b5132 6915
62f3bb11 6916 sect = bfd_make_section_anyway (abfd, name);
252b5132 6917 if (sect == NULL)
b34976b6 6918 return FALSE;
252b5132
RH		 6919
6920#if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
eea6121a 6921 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
252b5132
RH		 6922 sect->filepos = note->descpos
6923 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
6924#endif
6925
6926#if defined (HAVE_LWPSTATUS_T_PR_FPREG)
eea6121a 6927 sect->size = sizeof (lwpstat.pr_fpreg);
252b5132
RH		 6928 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
6929#endif
6930
6931 sect->flags = SEC_HAS_CONTENTS;
6932 sect->alignment_power = 2;
6933
936e320b 6934 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
252b5132
RH		 6935}
6936#endif /* defined (HAVE_LWPSTATUS_T) */
6937
16e9c715 6938#if defined (HAVE_WIN32_PSTATUS_T)
b34976b6 6939static bfd_boolean
217aa764 6940elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
16e9c715
NC		 6941{
6942 char buf[30];
c044fabd 6943 char *name;
d4c88bbb 6944 size_t len;
c044fabd 6945 asection *sect;
16e9c715
NC		 6946 win32_pstatus_t pstatus;
6947
6948 if (note->descsz < sizeof (pstatus))
b34976b6 6949 return TRUE;
16e9c715 6950
e8eab623 6951 memcpy (&pstatus, note->descdata, sizeof (pstatus));
c044fabd
KH		 6952
6953 switch (pstatus.data_type)
16e9c715
NC		 6954 {
6955 case NOTE_INFO_PROCESS:
6956 /* FIXME: need to add ->core_command. */
6957 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
6958 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
c044fabd 6959 break;
16e9c715
NC		 6960
6961 case NOTE_INFO_THREAD:
6962 /* Make a ".reg/999" section. */
6963 sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid);
c044fabd 6964
d4c88bbb 6965 len = strlen (buf) + 1;
217aa764 6966 name = bfd_alloc (abfd, len);
16e9c715 6967 if (name == NULL)
b34976b6 6968 return FALSE;
c044fabd 6969
d4c88bbb 6970 memcpy (name, buf, len);
16e9c715 6971
62f3bb11 6972 sect = bfd_make_section_anyway (abfd, name);
16e9c715 6973 if (sect == NULL)
b34976b6 6974 return FALSE;
c044fabd 6975
eea6121a 6976 sect->size = sizeof (pstatus.data.thread_info.thread_context);
079e9a2f
AM		 6977 sect->filepos = (note->descpos
6978 + offsetof (struct win32_pstatus,
6979 data.thread_info.thread_context));
16e9c715
NC		 6980 sect->flags = SEC_HAS_CONTENTS;
6981 sect->alignment_power = 2;
6982
6983 if (pstatus.data.thread_info.is_active_thread)
6984 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
b34976b6 6985 return FALSE;
16e9c715
NC		 6986 break;
6987
6988 case NOTE_INFO_MODULE:
6989 /* Make a ".module/xxxxxxxx" section. */
c044fabd
KH		 6990 sprintf (buf, ".module/%08x", pstatus.data.module_info.base_address);
6991
d4c88bbb 6992 len = strlen (buf) + 1;
217aa764 6993 name = bfd_alloc (abfd, len);
16e9c715 6994 if (name == NULL)
b34976b6 6995 return FALSE;
c044fabd 6996
d4c88bbb 6997 memcpy (name, buf, len);
252b5132 6998
62f3bb11 6999 sect = bfd_make_section_anyway (abfd, name);
c044fabd 7000
16e9c715 7001 if (sect == NULL)
b34976b6 7002 return FALSE;
c044fabd 7003
eea6121a 7004 sect->size = note->descsz;
16e9c715
NC		 7005 sect->filepos = note->descpos;
7006 sect->flags = SEC_HAS_CONTENTS;
7007 sect->alignment_power = 2;
7008 break;
7009
7010 default:
b34976b6 7011 return TRUE;
16e9c715
NC		 7012 }
7013
b34976b6 7014 return TRUE;
16e9c715
NC		 7015}
7016#endif /* HAVE_WIN32_PSTATUS_T */
252b5132 7017
b34976b6 7018static bfd_boolean
217aa764 7019elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
252b5132 7020{
9c5bfbb7 7021 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
bb0082d6 7022
252b5132
RH		 7023 switch (note->type)
7024 {
7025 default:
b34976b6 7026 return TRUE;
252b5132 7027
252b5132 7028 case NT_PRSTATUS:
bb0082d6
AM		 7029 if (bed->elf_backend_grok_prstatus)
7030 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
b34976b6 7031 return TRUE;
bb0082d6 7032#if defined (HAVE_PRSTATUS_T)
252b5132 7033 return elfcore_grok_prstatus (abfd, note);
bb0082d6 7034#else
b34976b6 7035 return TRUE;
252b5132
RH		 7036#endif
7037
7038#if defined (HAVE_PSTATUS_T)
7039 case NT_PSTATUS:
7040 return elfcore_grok_pstatus (abfd, note);
7041#endif
7042
7043#if defined (HAVE_LWPSTATUS_T)
7044 case NT_LWPSTATUS:
7045 return elfcore_grok_lwpstatus (abfd, note);
7046#endif
7047
7048 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7049 return elfcore_grok_prfpreg (abfd, note);
7050
16e9c715 7051#if defined (HAVE_WIN32_PSTATUS_T)
c044fabd 7052 case NT_WIN32PSTATUS:
16e9c715
NC		 7053 return elfcore_grok_win32pstatus (abfd, note);
7054#endif
7055
c044fabd 7056 case NT_PRXFPREG: /* Linux SSE extension */
e377ab71
MK		 7057 if (note->namesz == 6
7058 && strcmp (note->namedata, "LINUX") == 0)
ff08c6bb
JB		 7059 return elfcore_grok_prxfpreg (abfd, note);
7060 else
b34976b6 7061 return TRUE;
ff08c6bb 7062
252b5132
RH		 7063 case NT_PRPSINFO:
7064 case NT_PSINFO:
bb0082d6
AM		 7065 if (bed->elf_backend_grok_psinfo)
7066 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
b34976b6 7067 return TRUE;
bb0082d6 7068#if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
252b5132 7069 return elfcore_grok_psinfo (abfd, note);
bb0082d6 7070#else
b34976b6 7071 return TRUE;
252b5132 7072#endif
3333a7c3
RM		 7073
7074 case NT_AUXV:
7075 {
62f3bb11 7076 asection *sect = bfd_make_section_anyway (abfd, ".auxv");
3333a7c3
RM		 7077
7078 if (sect == NULL)
7079 return FALSE;
eea6121a 7080 sect->size = note->descsz;
3333a7c3
RM		 7081 sect->filepos = note->descpos;
7082 sect->flags = SEC_HAS_CONTENTS;
7083 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7084
7085 return TRUE;
7086 }
252b5132
RH		 7087 }
7088}
7089
b34976b6 7090static bfd_boolean
217aa764 7091elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
50b2bdb7
AM		 7092{
7093 char *cp;
7094
7095 cp = strchr (note->namedata, '@');
7096 if (cp != NULL)
7097 {
d2b64500 7098 *lwpidp = atoi(cp + 1);
b34976b6 7099 return TRUE;
50b2bdb7 7100 }
b34976b6 7101 return FALSE;
50b2bdb7
AM		 7102}
7103
b34976b6 7104static bfd_boolean
217aa764 7105elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
50b2bdb7
AM		 7106{
7107
7108 /* Signal number at offset 0x08. */
7109 elf_tdata (abfd)->core_signal
7110 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7111
7112 /* Process ID at offset 0x50. */
7113 elf_tdata (abfd)->core_pid
7114 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7115
7116 /* Command name at 0x7c (max 32 bytes, including nul). */
7117 elf_tdata (abfd)->core_command
7118 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
7119
7720ba9f
MK		 7120 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
7121 note);
50b2bdb7
AM		 7122}
7123
b34976b6 7124static bfd_boolean
217aa764 7125elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
50b2bdb7
AM		 7126{
7127 int lwp;
7128
7129 if (elfcore_netbsd_get_lwpid (note, &lwp))
7130 elf_tdata (abfd)->core_lwpid = lwp;
7131
b4db1224 7132 if (note->type == NT_NETBSDCORE_PROCINFO)
50b2bdb7
AM		 7133 {
7134 /* NetBSD-specific core "procinfo". Note that we expect to
7135 find this note before any of the others, which is fine,
7136 since the kernel writes this note out first when it
7137 creates a core file. */
47d9a591 7138
50b2bdb7
AM		 7139 return elfcore_grok_netbsd_procinfo (abfd, note);
7140 }
7141
b4db1224
JT		 7142 /* As of Jan 2002 there are no other machine-independent notes
7143 defined for NetBSD core files. If the note type is less
7144 than the start of the machine-dependent note types, we don't
7145 understand it. */
47d9a591 7146
b4db1224 7147 if (note->type < NT_NETBSDCORE_FIRSTMACH)
b34976b6 7148 return TRUE;
50b2bdb7
AM		 7149
7150
7151 switch (bfd_get_arch (abfd))
7152 {
7153 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7154 PT_GETFPREGS == mach+2. */
7155
7156 case bfd_arch_alpha:
7157 case bfd_arch_sparc:
7158 switch (note->type)
7159 {
b4db1224 7160 case NT_NETBSDCORE_FIRSTMACH+0:
50b2bdb7
AM		 7161 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7162
b4db1224 7163 case NT_NETBSDCORE_FIRSTMACH+2:
50b2bdb7
AM		 7164 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7165
7166 default:
b34976b6 7167 return TRUE;
50b2bdb7
AM		 7168 }
7169
7170 /* On all other arch's, PT_GETREGS == mach+1 and
7171 PT_GETFPREGS == mach+3. */
7172
7173 default:
7174 switch (note->type)
7175 {
b4db1224 7176 case NT_NETBSDCORE_FIRSTMACH+1:
50b2bdb7
AM		 7177 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7178
b4db1224 7179 case NT_NETBSDCORE_FIRSTMACH+3:
50b2bdb7
AM		 7180 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7181
7182 default:
b34976b6 7183 return TRUE;
50b2bdb7
AM		 7184 }
7185 }
7186 /* NOTREACHED */
7187}
7188
07c6e936 7189static bfd_boolean
217aa764 7190elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, pid_t *tid)
07c6e936
NC		 7191{
7192 void *ddata = note->descdata;
7193 char buf[100];
7194 char *name;
7195 asection *sect;
f8843e87
AM		 7196 short sig;
7197 unsigned flags;
07c6e936
NC		 7198
7199 /* nto_procfs_status 'pid' field is at offset 0. */
7200 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
7201
f8843e87
AM		 7202 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7203 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
7204
7205 /* nto_procfs_status 'flags' field is at offset 8. */
7206 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
07c6e936
NC		 7207
7208 /* nto_procfs_status 'what' field is at offset 14. */
f8843e87
AM		 7209 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
7210 {
7211 elf_tdata (abfd)->core_signal = sig;
7212 elf_tdata (abfd)->core_lwpid = *tid;
7213 }
07c6e936 7214
f8843e87
AM		 7215 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7216 do not come from signals so we make sure we set the current
7217 thread just in case. */
7218 if (flags & 0x00000080)
7219 elf_tdata (abfd)->core_lwpid = *tid;
07c6e936
NC		 7220
7221 /* Make a ".qnx_core_status/%d" section. */
7222 sprintf (buf, ".qnx_core_status/%d", *tid);
7223
217aa764 7224 name = bfd_alloc (abfd, strlen (buf) + 1);
07c6e936
NC		 7225 if (name == NULL)
7226 return FALSE;
7227 strcpy (name, buf);
7228
62f3bb11 7229 sect = bfd_make_section_anyway (abfd, name);
07c6e936
NC		 7230 if (sect == NULL)
7231 return FALSE;
7232
eea6121a 7233 sect->size = note->descsz;
07c6e936
NC		 7234 sect->filepos = note->descpos;
7235 sect->flags = SEC_HAS_CONTENTS;
7236 sect->alignment_power = 2;
7237
7238 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7239}
7240
7241static bfd_boolean
217aa764 7242elfcore_grok_nto_gregs (bfd *abfd, Elf_Internal_Note *note, pid_t tid)
07c6e936
NC		 7243{
7244 char buf[100];
7245 char *name;
7246 asection *sect;
7247
7248 /* Make a ".reg/%d" section. */
7249 sprintf (buf, ".reg/%d", tid);
7250
217aa764 7251 name = bfd_alloc (abfd, strlen (buf) + 1);
07c6e936
NC		 7252 if (name == NULL)
7253 return FALSE;
7254 strcpy (name, buf);
7255
62f3bb11 7256 sect = bfd_make_section_anyway (abfd, name);
07c6e936
NC		 7257 if (sect == NULL)
7258 return FALSE;
7259
eea6121a 7260 sect->size = note->descsz;
07c6e936
NC		 7261 sect->filepos = note->descpos;
7262 sect->flags = SEC_HAS_CONTENTS;
7263 sect->alignment_power = 2;
7264
f8843e87
AM		 7265 /* This is the current thread. */
7266 if (elf_tdata (abfd)->core_lwpid == tid)
7267 return elfcore_maybe_make_sect (abfd, ".reg", sect);
7268
7269 return TRUE;
07c6e936
NC		 7270}
7271
7272#define BFD_QNT_CORE_INFO 7
7273#define BFD_QNT_CORE_STATUS 8
7274#define BFD_QNT_CORE_GREG 9
7275#define BFD_QNT_CORE_FPREG 10
7276
7277static bfd_boolean
217aa764 7278elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
07c6e936
NC		 7279{
7280 /* Every GREG section has a STATUS section before it. Store the
811072d8 7281 tid from the previous call to pass down to the next gregs
07c6e936
NC		 7282 function. */
7283 static pid_t tid = 1;
7284
7285 switch (note->type)
7286 {
7287 case BFD_QNT_CORE_INFO: return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7288 case BFD_QNT_CORE_STATUS: return elfcore_grok_nto_status (abfd, note, &tid);
7289 case BFD_QNT_CORE_GREG: return elfcore_grok_nto_gregs (abfd, note, tid);
7290 case BFD_QNT_CORE_FPREG: return elfcore_grok_prfpreg (abfd, note);
7291 default: return TRUE;
7292 }
7293}
7294
7c76fa91
MS		 7295/* Function: elfcore_write_note
7296
47d9a591 7297 Inputs:
7c76fa91
MS		 7298 buffer to hold note
7299 name of note
7300 type of note
7301 data for note
7302 size of data for note
7303
7304 Return:
7305 End of buffer containing note. */
7306
7307char *
217aa764
AM		 7308elfcore_write_note (bfd *abfd,
7309 char *buf,
7310 int *bufsiz,
7311 const char *name,
7312 int type,
7313 const void *input,
7314 int size)
7c76fa91
MS		 7315{
7316 Elf_External_Note *xnp;
d4c88bbb
AM		 7317 size_t namesz;
7318 size_t pad;
7319 size_t newspace;
7c76fa91
MS		 7320 char *p, *dest;
7321
d4c88bbb
AM		 7322 namesz = 0;
7323 pad = 0;
7324 if (name != NULL)
7325 {
9c5bfbb7 7326 const struct elf_backend_data *bed;
d4c88bbb
AM		 7327
7328 namesz = strlen (name) + 1;
7329 bed = get_elf_backend_data (abfd);
45d6a902 7330 pad = -namesz & ((1 << bed->s->log_file_align) - 1);
d4c88bbb
AM		 7331 }
7332
5de3bf90 7333 newspace = 12 + namesz + pad + size;
d4c88bbb 7334
7c76fa91
MS		 7335 p = realloc (buf, *bufsiz + newspace);
7336 dest = p + *bufsiz;
7337 *bufsiz += newspace;
7338 xnp = (Elf_External_Note *) dest;
7339 H_PUT_32 (abfd, namesz, xnp->namesz);
7340 H_PUT_32 (abfd, size, xnp->descsz);
7341 H_PUT_32 (abfd, type, xnp->type);
d4c88bbb
AM		 7342 dest = xnp->name;
7343 if (name != NULL)
7344 {
7345 memcpy (dest, name, namesz);
7346 dest += namesz;
7347 while (pad != 0)
7348 {
7349 *dest++ = '\0';
7350 --pad;
7351 }
7352 }
7353 memcpy (dest, input, size);
7c76fa91
MS		 7354 return p;
7355}
7356
7357#if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7358char *
217aa764
AM		 7359elfcore_write_prpsinfo (bfd *abfd,
7360 char *buf,
7361 int *bufsiz,
7362 const char *fname,
7363 const char *psargs)
7c76fa91
MS		 7364{
7365 int note_type;
7366 char *note_name = "CORE";
7367
7368#if defined (HAVE_PSINFO_T)
7369 psinfo_t data;
7370 note_type = NT_PSINFO;
7371#else
7372 prpsinfo_t data;
7373 note_type = NT_PRPSINFO;
7374#endif
7375
7376 memset (&data, 0, sizeof (data));
7377 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
7378 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
47d9a591 7379 return elfcore_write_note (abfd, buf, bufsiz,
7c76fa91
MS		 7380 note_name, note_type, &data, sizeof (data));
7381}
7382#endif /* PSINFO_T or PRPSINFO_T */
7383
7384#if defined (HAVE_PRSTATUS_T)
7385char *
217aa764
AM		 7386elfcore_write_prstatus (bfd *abfd,
7387 char *buf,
7388 int *bufsiz,
7389 long pid,
7390 int cursig,
7391 const void *gregs)
7c76fa91
MS		 7392{
7393 prstatus_t prstat;
7394 char *note_name = "CORE";
7395
7396 memset (&prstat, 0, sizeof (prstat));
7397 prstat.pr_pid = pid;
7398 prstat.pr_cursig = cursig;
c106e334 7399 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
47d9a591 7400 return elfcore_write_note (abfd, buf, bufsiz,
7c76fa91
MS		 7401 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
7402}
7403#endif /* HAVE_PRSTATUS_T */
7404
51316059
MS		 7405#if defined (HAVE_LWPSTATUS_T)
7406char *
217aa764
AM		 7407elfcore_write_lwpstatus (bfd *abfd,
7408 char *buf,
7409 int *bufsiz,
7410 long pid,
7411 int cursig,
7412 const void *gregs)
51316059
MS		 7413{
7414 lwpstatus_t lwpstat;
7415 char *note_name = "CORE";
7416
7417 memset (&lwpstat, 0, sizeof (lwpstat));
7418 lwpstat.pr_lwpid = pid >> 16;
7419 lwpstat.pr_cursig = cursig;
7420#if defined (HAVE_LWPSTATUS_T_PR_REG)
7421 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
7422#elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7423#if !defined(gregs)
7424 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
7425 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
7426#else
7427 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
7428 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
7429#endif
7430#endif
47d9a591 7431 return elfcore_write_note (abfd, buf, bufsiz, note_name,
51316059
MS		 7432 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
7433}
7434#endif /* HAVE_LWPSTATUS_T */
7435
7c76fa91
MS		 7436#if defined (HAVE_PSTATUS_T)
7437char *
217aa764
AM		 7438elfcore_write_pstatus (bfd *abfd,
7439 char *buf,
7440 int *bufsiz,
7441 long pid,
7442 int cursig,
7443 const void *gregs)
7c76fa91
MS		 7444{
7445 pstatus_t pstat;
7446 char *note_name = "CORE";
7447
51316059
MS		 7448 memset (&pstat, 0, sizeof (pstat));
7449 pstat.pr_pid = pid & 0xffff;
47d9a591 7450 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
51316059
MS		 7451 NT_PSTATUS, &pstat, sizeof (pstat));
7452 return buf;
7c76fa91
MS		 7453}
7454#endif /* HAVE_PSTATUS_T */
7455
7456char *
217aa764
AM		 7457elfcore_write_prfpreg (bfd *abfd,
7458 char *buf,
7459 int *bufsiz,
7460 const void *fpregs,
7461 int size)
7c76fa91
MS		 7462{
7463 char *note_name = "CORE";
47d9a591 7464 return elfcore_write_note (abfd, buf, bufsiz,
7c76fa91
MS		 7465 note_name, NT_FPREGSET, fpregs, size);
7466}
7467
7468char *
217aa764
AM		 7469elfcore_write_prxfpreg (bfd *abfd,
7470 char *buf,
7471 int *bufsiz,
7472 const void *xfpregs,
7473 int size)
7c76fa91
MS		 7474{
7475 char *note_name = "LINUX";
47d9a591 7476 return elfcore_write_note (abfd, buf, bufsiz,
7c76fa91
MS		 7477 note_name, NT_PRXFPREG, xfpregs, size);
7478}
7479
b34976b6 7480static bfd_boolean
217aa764 7481elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
252b5132 7482{
c044fabd
KH		 7483 char *buf;
7484 char *p;
252b5132
RH		 7485
7486 if (size <= 0)
b34976b6 7487 return TRUE;
252b5132 7488
dc810e39 7489 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
b34976b6 7490 return FALSE;
252b5132 7491
dc810e39 7492 buf = bfd_malloc (size);
252b5132 7493 if (buf == NULL)
b34976b6 7494 return FALSE;
252b5132 7495
dc810e39 7496 if (bfd_bread (buf, size, abfd) != size)
252b5132
RH		 7497 {
7498 error:
7499 free (buf);
b34976b6 7500 return FALSE;
252b5132
RH		 7501 }
7502
7503 p = buf;
7504 while (p < buf + size)
7505 {
c044fabd
KH		 7506 /* FIXME: bad alignment assumption. */
7507 Elf_External_Note *xnp = (Elf_External_Note *) p;
252b5132
RH		 7508 Elf_Internal_Note in;
7509
dc810e39 7510 in.type = H_GET_32 (abfd, xnp->type);
252b5132 7511
dc810e39 7512 in.namesz = H_GET_32 (abfd, xnp->namesz);
252b5132
RH		 7513 in.namedata = xnp->name;
7514
dc810e39 7515 in.descsz = H_GET_32 (abfd, xnp->descsz);
252b5132
RH		 7516 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7517 in.descpos = offset + (in.descdata - buf);
7518
50b2bdb7
AM		 7519 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7520 {
7521 if (! elfcore_grok_netbsd_note (abfd, &in))
7522 goto error;
7523 }
07c6e936
NC		 7524 else if (strncmp (in.namedata, "QNX", 3) == 0)
7525 {
7526 if (! elfcore_grok_nto_note (abfd, &in))
7527 goto error;
7528 }
50b2bdb7
AM		 7529 else
7530 {
7531 if (! elfcore_grok_note (abfd, &in))
7532 goto error;
7533 }
252b5132
RH		 7534
7535 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7536 }
7537
7538 free (buf);
b34976b6 7539 return TRUE;
252b5132 7540}
98d8431c
JB		 7541\f
7542/* Providing external access to the ELF program header table. */
7543
7544/* Return an upper bound on the number of bytes required to store a
7545 copy of ABFD's program header table entries. Return -1 if an error
7546 occurs; bfd_get_error will return an appropriate code. */
c044fabd 7547
98d8431c 7548long
217aa764 7549bfd_get_elf_phdr_upper_bound (bfd *abfd)
98d8431c
JB		 7550{
7551 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7552 {
7553 bfd_set_error (bfd_error_wrong_format);
7554 return -1;
7555 }
7556
936e320b 7557 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
98d8431c
JB		 7558}
7559
98d8431c
JB		 7560/* Copy ABFD's program header table entries to *PHDRS. The entries
7561 will be stored as an array of Elf_Internal_Phdr structures, as
7562 defined in include/elf/internal.h. To find out how large the
7563 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7564
7565 Return the number of program header table entries read, or -1 if an
7566 error occurs; bfd_get_error will return an appropriate code. */
c044fabd 7567
98d8431c 7568int
217aa764 7569bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
98d8431c
JB		 7570{
7571 int num_phdrs;
7572
7573 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7574 {
7575 bfd_set_error (bfd_error_wrong_format);
7576 return -1;
7577 }
7578
7579 num_phdrs = elf_elfheader (abfd)->e_phnum;
c044fabd 7580 memcpy (phdrs, elf_tdata (abfd)->phdr,
98d8431c
JB		 7581 num_phdrs * sizeof (Elf_Internal_Phdr));
7582
7583 return num_phdrs;
7584}
ae4221d7
L		 7585
7586void
217aa764 7587_bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
ae4221d7 7588{
d3b05f8d 7589#ifdef BFD64
ae4221d7
L		 7590 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7591
7592 i_ehdrp = elf_elfheader (abfd);
7593 if (i_ehdrp == NULL)
7594 sprintf_vma (buf, value);
7595 else
7596 {
7597 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
cc55aec9 7598 {
ae4221d7 7599#if BFD_HOST_64BIT_LONG
cc55aec9 7600 sprintf (buf, "%016lx", value);
ae4221d7 7601#else
cc55aec9
AM		 7602 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
7603 _bfd_int64_low (value));
ae4221d7 7604#endif
cc55aec9 7605 }
ae4221d7
L		 7606 else
7607 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
7608 }
d3b05f8d
L		 7609#else
7610 sprintf_vma (buf, value);
7611#endif
ae4221d7
L		 7612}
7613
7614void
217aa764 7615_bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
ae4221d7 7616{
d3b05f8d 7617#ifdef BFD64
ae4221d7
L		 7618 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7619
7620 i_ehdrp = elf_elfheader (abfd);
7621 if (i_ehdrp == NULL)
7622 fprintf_vma ((FILE *) stream, value);
7623 else
7624 {
7625 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
cc55aec9 7626 {
ae4221d7 7627#if BFD_HOST_64BIT_LONG
cc55aec9 7628 fprintf ((FILE *) stream, "%016lx", value);
ae4221d7 7629#else
cc55aec9
AM		 7630 fprintf ((FILE *) stream, "%08lx%08lx",
7631 _bfd_int64_high (value), _bfd_int64_low (value));
ae4221d7 7632#endif
cc55aec9 7633 }
ae4221d7
L		 7634 else
7635 fprintf ((FILE *) stream, "%08lx",
7636 (unsigned long) (value & 0xffffffff));
7637 }
d3b05f8d
L		 7638#else
7639 fprintf_vma ((FILE *) stream, value);
7640#endif
ae4221d7 7641}
db6751f2
JJ		 7642
7643enum elf_reloc_type_class
217aa764 7644_bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
db6751f2
JJ		 7645{
7646 return reloc_class_normal;
7647}
f8df10f4 7648
47d9a591 7649/* For RELA architectures, return the relocation value for a
f8df10f4
JJ		 7650 relocation against a local symbol. */
7651
7652bfd_vma
217aa764
AM		 7653_bfd_elf_rela_local_sym (bfd *abfd,
7654 Elf_Internal_Sym *sym,
8517fae7 7655 asection **psec,
217aa764 7656 Elf_Internal_Rela *rel)
f8df10f4 7657{
8517fae7 7658 asection *sec = *psec;
f8df10f4
JJ		 7659 bfd_vma relocation;
7660
7661 relocation = (sec->output_section->vma
7662 + sec->output_offset
7663 + sym->st_value);
7664 if ((sec->flags & SEC_MERGE)
c629eae0 7665 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
68bfbfcc 7666 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
f8df10f4 7667 {
f8df10f4 7668 rel->r_addend =
8517fae7 7669 _bfd_merged_section_offset (abfd, psec,
65765700 7670 elf_section_data (sec)->sec_info,
753731ee
AM		 7671 sym->st_value + rel->r_addend);
7672 if (sec != *psec)
7673 {
7674 /* If we have changed the section, and our original section is
7675 marked with SEC_EXCLUDE, it means that the original
7676 SEC_MERGE section has been completely subsumed in some
7677 other SEC_MERGE section. In this case, we need to leave
7678 some info around for --emit-relocs. */
7679 if ((sec->flags & SEC_EXCLUDE) != 0)
7680 sec->kept_section = *psec;
7681 sec = *psec;
7682 }
8517fae7
AM		 7683 rel->r_addend -= relocation;
7684 rel->r_addend += sec->output_section->vma + sec->output_offset;
f8df10f4
JJ		 7685 }
7686 return relocation;
7687}
c629eae0
JJ		 7688
7689bfd_vma
217aa764
AM		 7690_bfd_elf_rel_local_sym (bfd *abfd,
7691 Elf_Internal_Sym *sym,
7692 asection **psec,
7693 bfd_vma addend)
47d9a591 7694{
c629eae0
JJ		 7695 asection *sec = *psec;
7696
68bfbfcc 7697 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
c629eae0
JJ		 7698 return sym->st_value + addend;
7699
7700 return _bfd_merged_section_offset (abfd, psec,
65765700 7701 elf_section_data (sec)->sec_info,
753731ee 7702 sym->st_value + addend);
c629eae0
JJ		 7703}
7704
7705bfd_vma
217aa764 7706_bfd_elf_section_offset (bfd *abfd,
eea6121a 7707 struct bfd_link_info *info ATTRIBUTE_UNUSED,
217aa764
AM		 7708 asection *sec,
7709 bfd_vma offset)
c629eae0 7710{
68bfbfcc 7711 switch (sec->sec_info_type)
65765700
JJ		 7712 {
7713 case ELF_INFO_TYPE_STABS:
eea6121a
AM		 7714 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
7715 offset);
65765700
JJ		 7716 case ELF_INFO_TYPE_EH_FRAME:
7717 return _bfd_elf_eh_frame_section_offset (abfd, sec, offset);
7718 default:
7719 return offset;
7720 }
c629eae0 7721}
3333a7c3
RM		 7722\f
7723/* Create a new BFD as if by bfd_openr. Rather than opening a file,
7724 reconstruct an ELF file by reading the segments out of remote memory
7725 based on the ELF file header at EHDR_VMA and the ELF program headers it
7726 points to. If not null, *LOADBASEP is filled in with the difference
7727 between the VMAs from which the segments were read, and the VMAs the
7728 file headers (and hence BFD's idea of each section's VMA) put them at.
7729
7730 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7731 remote memory at target address VMA into the local buffer at MYADDR; it
7732 should return zero on success or an `errno' code on failure. TEMPL must
7733 be a BFD for an ELF target with the word size and byte order found in
7734 the remote memory. */
7735
7736bfd *
217aa764
AM		 7737bfd_elf_bfd_from_remote_memory
7738 (bfd *templ,
7739 bfd_vma ehdr_vma,
7740 bfd_vma *loadbasep,
7741 int (*target_read_memory) (bfd_vma, char *, int))
3333a7c3
RM		 7742{
7743 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
7744 (templ, ehdr_vma, loadbasep, target_read_memory);
7745}
4c45e5c9
JJ		 7746\f
7747long
c9727e01
AM		 7748_bfd_elf_get_synthetic_symtab (bfd *abfd,
7749 long symcount ATTRIBUTE_UNUSED,
7750 asymbol **syms ATTRIBUTE_UNUSED,
7751 long dynsymcount ATTRIBUTE_UNUSED,
7752 asymbol **dynsyms,
7753 asymbol **ret)
4c45e5c9
JJ		 7754{
7755 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7756 asection *relplt;
7757 asymbol *s;
7758 const char *relplt_name;
7759 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
7760 arelent *p;
7761 long count, i, n;
7762 size_t size;
7763 Elf_Internal_Shdr *hdr;
7764 char *names;
7765 asection *plt;
7766
90e3cdf2
JJ		 7767 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
7768 return 0;
7769
4c45e5c9
JJ		 7770 *ret = NULL;
7771 if (!bed->plt_sym_val)
7772 return 0;
7773
7774 relplt_name = bed->relplt_name;
7775 if (relplt_name == NULL)
7776 relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
7777 relplt = bfd_get_section_by_name (abfd, relplt_name);
7778 if (relplt == NULL)
7779 return 0;
7780
7781 hdr = &elf_section_data (relplt)->this_hdr;
7782 if (hdr->sh_link != elf_dynsymtab (abfd)
7783 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
7784 return 0;
7785
7786 plt = bfd_get_section_by_name (abfd, ".plt");
7787 if (plt == NULL)
7788 return 0;
7789
7790 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
c9727e01 7791 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
4c45e5c9
JJ		 7792 return -1;
7793
eea6121a 7794 count = relplt->size / hdr->sh_entsize;
4c45e5c9
JJ		 7795 size = count * sizeof (asymbol);
7796 p = relplt->relocation;
7797 for (i = 0; i < count; i++, s++, p++)
7798 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
7799
7800 s = *ret = bfd_malloc (size);
7801 if (s == NULL)
7802 return -1;
7803
7804 names = (char *) (s + count);
7805 p = relplt->relocation;
7806 n = 0;
7807 for (i = 0; i < count; i++, s++, p++)
7808 {
7809 size_t len;
7810 bfd_vma addr;
7811
7812 addr = bed->plt_sym_val (i, plt, p);
7813 if (addr == (bfd_vma) -1)
7814 continue;
7815
7816 *s = **p->sym_ptr_ptr;
7817 s->section = plt;
7818 s->value = addr - plt->vma;
7819 s->name = names;
7820 len = strlen ((*p->sym_ptr_ptr)->name);
7821 memcpy (names, (*p->sym_ptr_ptr)->name, len);
7822 names += len;
7823 memcpy (names, "@plt", sizeof ("@plt"));
7824 names += sizeof ("@plt");
7825 ++n;
7826 }
7827
7828 return n;
7829}
3d7f7666
L		 7830
7831/* Sort symbol by binding and section. We want to put definitions
7832 sorted by section at the beginning. */
7833
7834static int
7835elf_sort_elf_symbol (const void *arg1, const void *arg2)
7836{
7837 const Elf_Internal_Sym *s1;
7838 const Elf_Internal_Sym *s2;
7839 int shndx;
7840
7841 /* Make sure that undefined symbols are at the end. */
7842 s1 = (const Elf_Internal_Sym *) arg1;
7843 if (s1->st_shndx == SHN_UNDEF)
7844 return 1;
7845 s2 = (const Elf_Internal_Sym *) arg2;
7846 if (s2->st_shndx == SHN_UNDEF)
7847 return -1;
7848
7849 /* Sorted by section index. */
7850 shndx = s1->st_shndx - s2->st_shndx;
7851 if (shndx != 0)
7852 return shndx;
7853
7854 /* Sorted by binding. */
7855 return ELF_ST_BIND (s1->st_info) - ELF_ST_BIND (s2->st_info);
7856}
7857
7858struct elf_symbol
7859{
7860 Elf_Internal_Sym *sym;
7861 const char *name;
7862};
7863
7864static int
7865elf_sym_name_compare (const void *arg1, const void *arg2)
7866{
7867 const struct elf_symbol *s1 = (const struct elf_symbol *) arg1;
7868 const struct elf_symbol *s2 = (const struct elf_symbol *) arg2;
7869 return strcmp (s1->name, s2->name);
7870}
7871
7872/* Check if 2 sections define the same set of local and global
7873 symbols. */
7874
7875bfd_boolean
7876bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2)
7877{
7878 bfd *bfd1, *bfd2;
7879 const struct elf_backend_data *bed1, *bed2;
7880 Elf_Internal_Shdr *hdr1, *hdr2;
7881 bfd_size_type symcount1, symcount2;
7882 Elf_Internal_Sym *isymbuf1, *isymbuf2;
7883 Elf_Internal_Sym *isymstart1 = NULL, *isymstart2 = NULL, *isym;
7884 Elf_Internal_Sym *isymend;
7885 struct elf_symbol *symp, *symtable1 = NULL, *symtable2 = NULL;
7886 bfd_size_type count1, count2, i;
7887 int shndx1, shndx2;
7888 bfd_boolean result;
7889
7890 bfd1 = sec1->owner;
7891 bfd2 = sec2->owner;
7892
7893 /* If both are .gnu.linkonce sections, they have to have the same
7894 section name. */
7895 if (strncmp (sec1->name, ".gnu.linkonce",
7896 sizeof ".gnu.linkonce" - 1) == 0
7897 && strncmp (sec2->name, ".gnu.linkonce",
7898 sizeof ".gnu.linkonce" - 1) == 0)
7899 return strcmp (sec1->name + sizeof ".gnu.linkonce",
7900 sec2->name + sizeof ".gnu.linkonce") == 0;
7901
7902 /* Both sections have to be in ELF. */
7903 if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour
7904 || bfd_get_flavour (bfd2) != bfd_target_elf_flavour)
7905 return FALSE;
7906
7907 if (elf_section_type (sec1) != elf_section_type (sec2))
7908 return FALSE;
7909
7910 if ((elf_section_flags (sec1) & SHF_GROUP) != 0
7911 && (elf_section_flags (sec2) & SHF_GROUP) != 0)
7912 {
7913 /* If both are members of section groups, they have to have the
7914 same group name. */
7915 if (strcmp (elf_group_name (sec1), elf_group_name (sec2)) != 0)
7916 return FALSE;
7917 }
7918
7919 shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1);
7920 shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2);
7921 if (shndx1 == -1 || shndx2 == -1)
7922 return FALSE;
7923
7924 bed1 = get_elf_backend_data (bfd1);
7925 bed2 = get_elf_backend_data (bfd2);
7926 hdr1 = &elf_tdata (bfd1)->symtab_hdr;
7927 symcount1 = hdr1->sh_size / bed1->s->sizeof_sym;
7928 hdr2 = &elf_tdata (bfd2)->symtab_hdr;
7929 symcount2 = hdr2->sh_size / bed2->s->sizeof_sym;
7930
7931 if (symcount1 == 0 || symcount2 == 0)
7932 return FALSE;
7933
7934 isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0,
7935 NULL, NULL, NULL);
7936 isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0,
7937 NULL, NULL, NULL);
7938
7939 result = FALSE;
7940 if (isymbuf1 == NULL || isymbuf2 == NULL)
7941 goto done;
7942
7943 /* Sort symbols by binding and section. Global definitions are at
7944 the beginning. */
7945 qsort (isymbuf1, symcount1, sizeof (Elf_Internal_Sym),
7946 elf_sort_elf_symbol);
7947 qsort (isymbuf2, symcount2, sizeof (Elf_Internal_Sym),
7948 elf_sort_elf_symbol);
7949
7950 /* Count definitions in the section. */
7951 count1 = 0;
7952 for (isym = isymbuf1, isymend = isym + symcount1;
7953 isym < isymend; isym++)
7954 {
7955 if (isym->st_shndx == (unsigned int) shndx1)
7956 {
7957 if (count1 == 0)
7958 isymstart1 = isym;
7959 count1++;
7960 }
7961
7962 if (count1 && isym->st_shndx != (unsigned int) shndx1)
7963 break;
7964 }
7965
7966 count2 = 0;
7967 for (isym = isymbuf2, isymend = isym + symcount2;
7968 isym < isymend; isym++)
7969 {
7970 if (isym->st_shndx == (unsigned int) shndx2)
7971 {
7972 if (count2 == 0)
7973 isymstart2 = isym;
7974 count2++;
7975 }
7976
7977 if (count2 && isym->st_shndx != (unsigned int) shndx2)
7978 break;
7979 }
7980
7981 if (count1 == 0 || count2 == 0 || count1 != count2)
7982 goto done;
7983
7984 symtable1 = bfd_malloc (count1 * sizeof (struct elf_symbol));
7985 symtable2 = bfd_malloc (count1 * sizeof (struct elf_symbol));
7986
7987 if (symtable1 == NULL || symtable2 == NULL)
7988 goto done;
7989
7990 symp = symtable1;
7991 for (isym = isymstart1, isymend = isym + count1;
7992 isym < isymend; isym++)
7993 {
7994 symp->sym = isym;
7995 symp->name = bfd_elf_string_from_elf_section (bfd1,
7996 hdr1->sh_link,
7997 isym->st_name);
7998 symp++;
7999 }
8000
8001 symp = symtable2;
8002 for (isym = isymstart2, isymend = isym + count1;
8003 isym < isymend; isym++)
8004 {
8005 symp->sym = isym;
8006 symp->name = bfd_elf_string_from_elf_section (bfd2,
8007 hdr2->sh_link,
8008 isym->st_name);
8009 symp++;
8010 }
8011
8012 /* Sort symbol by name. */
8013 qsort (symtable1, count1, sizeof (struct elf_symbol),
8014 elf_sym_name_compare);
8015 qsort (symtable2, count1, sizeof (struct elf_symbol),
8016 elf_sym_name_compare);
8017
8018 for (i = 0; i < count1; i++)
8019 /* Two symbols must have the same binding, type and name. */
8020 if (symtable1 [i].sym->st_info != symtable2 [i].sym->st_info
8021 || symtable1 [i].sym->st_other != symtable2 [i].sym->st_other
8022 || strcmp (symtable1 [i].name, symtable2 [i].name) != 0)
8023 goto done;
8024
8025 result = TRUE;
8026
8027done:
8028 if (symtable1)
8029 free (symtable1);
8030 if (symtable2)
8031 free (symtable2);
8032 if (isymbuf1)
8033 free (isymbuf1);
8034 if (isymbuf2)
8035 free (isymbuf2);
8036
8037 return result;
8038}
GDB Binutils - Deliverables
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