1 /* ELF executable support for BFD.
3 Copyright (C) 1993-2017 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
27 BFD support for ELF formats is being worked on.
28 Currently, the best supported back ends are for sparc and i386
29 (running svr4 or Solaris 2).
31 Documentation of the internals of the support code still needs
32 to be written. The code is changing quickly enough that we
33 haven't bothered yet. */
35 /* For sparc64-cross-sparc32. */
43 #include "libiberty.h"
44 #include "safe-ctype.h"
45 #include "elf-linux-core.h"
51 static int elf_sort_sections (const void *, const void *);
52 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
53 static bfd_boolean prep_headers (bfd *);
54 static bfd_boolean swap_out_syms (bfd *, struct elf_strtab_hash **, int) ;
55 static bfd_boolean elf_read_notes (bfd *, file_ptr, bfd_size_type) ;
56 static bfd_boolean elf_parse_notes (bfd *abfd, char *buf, size_t size,
59 /* Swap version information in and out. The version information is
60 currently size independent. If that ever changes, this code will
61 need to move into elfcode.h. */
63 /* Swap in a Verdef structure. */
66 _bfd_elf_swap_verdef_in (bfd *abfd,
67 const Elf_External_Verdef *src,
68 Elf_Internal_Verdef *dst)
70 dst->vd_version = H_GET_16 (abfd, src->vd_version);
71 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
72 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
73 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
74 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
75 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
76 dst->vd_next = H_GET_32 (abfd, src->vd_next);
79 /* Swap out a Verdef structure. */
82 _bfd_elf_swap_verdef_out (bfd *abfd,
83 const Elf_Internal_Verdef *src,
84 Elf_External_Verdef *dst)
86 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
87 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
88 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
89 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
90 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
91 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
92 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
95 /* Swap in a Verdaux structure. */
98 _bfd_elf_swap_verdaux_in (bfd *abfd,
99 const Elf_External_Verdaux *src,
100 Elf_Internal_Verdaux *dst)
102 dst->vda_name = H_GET_32 (abfd, src->vda_name);
103 dst->vda_next = H_GET_32 (abfd, src->vda_next);
106 /* Swap out a Verdaux structure. */
109 _bfd_elf_swap_verdaux_out (bfd *abfd,
110 const Elf_Internal_Verdaux *src,
111 Elf_External_Verdaux *dst)
113 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
114 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
117 /* Swap in a Verneed structure. */
120 _bfd_elf_swap_verneed_in (bfd *abfd,
121 const Elf_External_Verneed *src,
122 Elf_Internal_Verneed *dst)
124 dst->vn_version = H_GET_16 (abfd, src->vn_version);
125 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
126 dst->vn_file = H_GET_32 (abfd, src->vn_file);
127 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
128 dst->vn_next = H_GET_32 (abfd, src->vn_next);
131 /* Swap out a Verneed structure. */
134 _bfd_elf_swap_verneed_out (bfd *abfd,
135 const Elf_Internal_Verneed *src,
136 Elf_External_Verneed *dst)
138 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
139 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
140 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
141 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
142 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
145 /* Swap in a Vernaux structure. */
148 _bfd_elf_swap_vernaux_in (bfd *abfd,
149 const Elf_External_Vernaux *src,
150 Elf_Internal_Vernaux *dst)
152 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
153 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
154 dst->vna_other = H_GET_16 (abfd, src->vna_other);
155 dst->vna_name = H_GET_32 (abfd, src->vna_name);
156 dst->vna_next = H_GET_32 (abfd, src->vna_next);
159 /* Swap out a Vernaux structure. */
162 _bfd_elf_swap_vernaux_out (bfd *abfd,
163 const Elf_Internal_Vernaux *src,
164 Elf_External_Vernaux *dst)
166 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
167 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
168 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
169 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
170 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
173 /* Swap in a Versym structure. */
176 _bfd_elf_swap_versym_in (bfd *abfd,
177 const Elf_External_Versym *src,
178 Elf_Internal_Versym *dst)
180 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
183 /* Swap out a Versym structure. */
186 _bfd_elf_swap_versym_out (bfd *abfd,
187 const Elf_Internal_Versym *src,
188 Elf_External_Versym *dst)
190 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
193 /* Standard ELF hash function. Do not change this function; you will
194 cause invalid hash tables to be generated. */
197 bfd_elf_hash (const char *namearg)
199 const unsigned char *name = (const unsigned char *) namearg;
204 while ((ch = *name++) != '\0')
207 if ((g = (h & 0xf0000000)) != 0)
210 /* The ELF ABI says `h &= ~g', but this is equivalent in
211 this case and on some machines one insn instead of two. */
215 return h & 0xffffffff;
218 /* DT_GNU_HASH hash function. Do not change this function; you will
219 cause invalid hash tables to be generated. */
222 bfd_elf_gnu_hash (const char *namearg)
224 const unsigned char *name = (const unsigned char *) namearg;
225 unsigned long h = 5381;
228 while ((ch = *name++) != '\0')
229 h = (h << 5) + h + ch;
230 return h & 0xffffffff;
233 /* Create a tdata field OBJECT_SIZE bytes in length, zeroed out and with
234 the object_id field of an elf_obj_tdata field set to OBJECT_ID. */
236 bfd_elf_allocate_object (bfd *abfd,
238 enum elf_target_id object_id)
240 BFD_ASSERT (object_size >= sizeof (struct elf_obj_tdata));
241 abfd->tdata.any = bfd_zalloc (abfd, object_size);
242 if (abfd->tdata.any == NULL)
245 elf_object_id (abfd) = object_id;
246 if (abfd->direction != read_direction)
248 struct output_elf_obj_tdata *o = bfd_zalloc (abfd, sizeof *o);
251 elf_tdata (abfd)->o = o;
252 elf_program_header_size (abfd) = (bfd_size_type) -1;
259 bfd_elf_make_object (bfd *abfd)
261 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
262 return bfd_elf_allocate_object (abfd, sizeof (struct elf_obj_tdata),
267 bfd_elf_mkcorefile (bfd *abfd)
269 /* I think this can be done just like an object file. */
270 if (!abfd->xvec->_bfd_set_format[(int) bfd_object] (abfd))
272 elf_tdata (abfd)->core = bfd_zalloc (abfd, sizeof (*elf_tdata (abfd)->core));
273 return elf_tdata (abfd)->core != NULL;
277 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
279 Elf_Internal_Shdr **i_shdrp;
280 bfd_byte *shstrtab = NULL;
282 bfd_size_type shstrtabsize;
284 i_shdrp = elf_elfsections (abfd);
286 || shindex >= elf_numsections (abfd)
287 || i_shdrp[shindex] == 0)
290 shstrtab = i_shdrp[shindex]->contents;
291 if (shstrtab == NULL)
293 /* No cached one, attempt to read, and cache what we read. */
294 offset = i_shdrp[shindex]->sh_offset;
295 shstrtabsize = i_shdrp[shindex]->sh_size;
297 /* Allocate and clear an extra byte at the end, to prevent crashes
298 in case the string table is not terminated. */
299 if (shstrtabsize + 1 <= 1
300 || bfd_seek (abfd, offset, SEEK_SET) != 0
301 || (shstrtab = (bfd_byte *) bfd_alloc (abfd, shstrtabsize + 1)) == NULL)
303 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
305 if (bfd_get_error () != bfd_error_system_call)
306 bfd_set_error (bfd_error_file_truncated);
307 bfd_release (abfd, shstrtab);
309 /* Once we've failed to read it, make sure we don't keep
310 trying. Otherwise, we'll keep allocating space for
311 the string table over and over. */
312 i_shdrp[shindex]->sh_size = 0;
315 shstrtab[shstrtabsize] = '\0';
316 i_shdrp[shindex]->contents = shstrtab;
318 return (char *) shstrtab;
322 bfd_elf_string_from_elf_section (bfd *abfd,
323 unsigned int shindex,
324 unsigned int strindex)
326 Elf_Internal_Shdr *hdr;
331 if (elf_elfsections (abfd) == NULL || shindex >= elf_numsections (abfd))
334 hdr = elf_elfsections (abfd)[shindex];
336 if (hdr->contents == NULL)
338 if (hdr->sh_type != SHT_STRTAB && hdr->sh_type < SHT_LOOS)
340 /* PR 17512: file: f057ec89. */
341 /* xgettext:c-format */
342 _bfd_error_handler (_("%B: attempt to load strings from"
343 " a non-string section (number %d)"),
348 if (bfd_elf_get_str_section (abfd, shindex) == NULL)
352 if (strindex >= hdr->sh_size)
354 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
356 /* xgettext:c-format */
357 (_("%B: invalid string offset %u >= %lu for section `%s'"),
358 abfd, strindex, (unsigned long) hdr->sh_size,
359 (shindex == shstrndx && strindex == hdr->sh_name
361 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
365 return ((char *) hdr->contents) + strindex;
368 /* Read and convert symbols to internal format.
369 SYMCOUNT specifies the number of symbols to read, starting from
370 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
371 are non-NULL, they are used to store the internal symbols, external
372 symbols, and symbol section index extensions, respectively.
373 Returns a pointer to the internal symbol buffer (malloced if necessary)
374 or NULL if there were no symbols or some kind of problem. */
377 bfd_elf_get_elf_syms (bfd *ibfd,
378 Elf_Internal_Shdr *symtab_hdr,
381 Elf_Internal_Sym *intsym_buf,
383 Elf_External_Sym_Shndx *extshndx_buf)
385 Elf_Internal_Shdr *shndx_hdr;
387 const bfd_byte *esym;
388 Elf_External_Sym_Shndx *alloc_extshndx;
389 Elf_External_Sym_Shndx *shndx;
390 Elf_Internal_Sym *alloc_intsym;
391 Elf_Internal_Sym *isym;
392 Elf_Internal_Sym *isymend;
393 const struct elf_backend_data *bed;
398 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
404 /* Normal syms might have section extension entries. */
406 if (elf_symtab_shndx_list (ibfd) != NULL)
408 elf_section_list * entry;
409 Elf_Internal_Shdr **sections = elf_elfsections (ibfd);
411 /* Find an index section that is linked to this symtab section. */
412 for (entry = elf_symtab_shndx_list (ibfd); entry != NULL; entry = entry->next)
415 if (entry->hdr.sh_link >= elf_numsections (ibfd))
418 if (sections[entry->hdr.sh_link] == symtab_hdr)
420 shndx_hdr = & entry->hdr;
425 if (shndx_hdr == NULL)
427 if (symtab_hdr == & elf_symtab_hdr (ibfd))
428 /* Not really accurate, but this was how the old code used to work. */
429 shndx_hdr = & elf_symtab_shndx_list (ibfd)->hdr;
430 /* Otherwise we do nothing. The assumption is that
431 the index table will not be needed. */
435 /* Read the symbols. */
437 alloc_extshndx = NULL;
439 bed = get_elf_backend_data (ibfd);
440 extsym_size = bed->s->sizeof_sym;
441 amt = (bfd_size_type) symcount * extsym_size;
442 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
443 if (extsym_buf == NULL)
445 alloc_ext = bfd_malloc2 (symcount, extsym_size);
446 extsym_buf = alloc_ext;
448 if (extsym_buf == NULL
449 || bfd_seek (ibfd, pos, SEEK_SET) != 0
450 || bfd_bread (extsym_buf, amt, ibfd) != amt)
456 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
460 amt = (bfd_size_type) symcount * sizeof (Elf_External_Sym_Shndx);
461 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
462 if (extshndx_buf == NULL)
464 alloc_extshndx = (Elf_External_Sym_Shndx *)
465 bfd_malloc2 (symcount, sizeof (Elf_External_Sym_Shndx));
466 extshndx_buf = alloc_extshndx;
468 if (extshndx_buf == NULL
469 || bfd_seek (ibfd, pos, SEEK_SET) != 0
470 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
477 if (intsym_buf == NULL)
479 alloc_intsym = (Elf_Internal_Sym *)
480 bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
481 intsym_buf = alloc_intsym;
482 if (intsym_buf == NULL)
486 /* Convert the symbols to internal form. */
487 isymend = intsym_buf + symcount;
488 for (esym = (const bfd_byte *) extsym_buf, isym = intsym_buf,
489 shndx = extshndx_buf;
491 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
492 if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym))
494 symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size;
495 /* xgettext:c-format */
496 _bfd_error_handler (_("%B symbol number %lu references"
497 " nonexistent SHT_SYMTAB_SHNDX section"),
498 ibfd, (unsigned long) symoffset);
499 if (alloc_intsym != NULL)
506 if (alloc_ext != NULL)
508 if (alloc_extshndx != NULL)
509 free (alloc_extshndx);
514 /* Look up a symbol name. */
516 bfd_elf_sym_name (bfd *abfd,
517 Elf_Internal_Shdr *symtab_hdr,
518 Elf_Internal_Sym *isym,
522 unsigned int iname = isym->st_name;
523 unsigned int shindex = symtab_hdr->sh_link;
525 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
526 /* Check for a bogus st_shndx to avoid crashing. */
527 && isym->st_shndx < elf_numsections (abfd))
529 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
530 shindex = elf_elfheader (abfd)->e_shstrndx;
533 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
536 else if (sym_sec && *name == '\0')
537 name = bfd_section_name (abfd, sym_sec);
542 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
543 sections. The first element is the flags, the rest are section
546 typedef union elf_internal_group {
547 Elf_Internal_Shdr *shdr;
549 } Elf_Internal_Group;
551 /* Return the name of the group signature symbol. Why isn't the
552 signature just a string? */
555 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
557 Elf_Internal_Shdr *hdr;
558 unsigned char esym[sizeof (Elf64_External_Sym)];
559 Elf_External_Sym_Shndx eshndx;
560 Elf_Internal_Sym isym;
562 /* First we need to ensure the symbol table is available. Make sure
563 that it is a symbol table section. */
564 if (ghdr->sh_link >= elf_numsections (abfd))
566 hdr = elf_elfsections (abfd) [ghdr->sh_link];
567 if (hdr->sh_type != SHT_SYMTAB
568 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
571 /* Go read the symbol. */
572 hdr = &elf_tdata (abfd)->symtab_hdr;
573 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
574 &isym, esym, &eshndx) == NULL)
577 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
580 /* Set next_in_group list pointer, and group name for NEWSECT. */
583 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
585 unsigned int num_group = elf_tdata (abfd)->num_group;
587 /* If num_group is zero, read in all SHT_GROUP sections. The count
588 is set to -1 if there are no SHT_GROUP sections. */
591 unsigned int i, shnum;
593 /* First count the number of groups. If we have a SHT_GROUP
594 section with just a flag word (ie. sh_size is 4), ignore it. */
595 shnum = elf_numsections (abfd);
598 #define IS_VALID_GROUP_SECTION_HEADER(shdr, minsize) \
599 ( (shdr)->sh_type == SHT_GROUP \
600 && (shdr)->sh_size >= minsize \
601 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
602 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
604 for (i = 0; i < shnum; i++)
606 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
608 if (IS_VALID_GROUP_SECTION_HEADER (shdr, 2 * GRP_ENTRY_SIZE))
614 num_group = (unsigned) -1;
615 elf_tdata (abfd)->num_group = num_group;
619 /* We keep a list of elf section headers for group sections,
620 so we can find them quickly. */
623 elf_tdata (abfd)->num_group = num_group;
624 elf_tdata (abfd)->group_sect_ptr = (Elf_Internal_Shdr **)
625 bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
626 if (elf_tdata (abfd)->group_sect_ptr == NULL)
630 for (i = 0; i < shnum; i++)
632 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
634 if (IS_VALID_GROUP_SECTION_HEADER (shdr, 2 * GRP_ENTRY_SIZE))
637 Elf_Internal_Group *dest;
639 /* Add to list of sections. */
640 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
643 /* Read the raw contents. */
644 BFD_ASSERT (sizeof (*dest) >= 4);
645 amt = shdr->sh_size * sizeof (*dest) / 4;
646 shdr->contents = (unsigned char *)
647 bfd_alloc2 (abfd, shdr->sh_size, sizeof (*dest) / 4);
648 /* PR binutils/4110: Handle corrupt group headers. */
649 if (shdr->contents == NULL)
652 /* xgettext:c-format */
653 (_("%B: corrupt size field in group section"
654 " header: 0x%lx"), abfd, shdr->sh_size);
655 bfd_set_error (bfd_error_bad_value);
660 memset (shdr->contents, 0, amt);
662 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
663 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
667 /* xgettext:c-format */
668 (_("%B: invalid size field in group section"
669 " header: 0x%lx"), abfd, shdr->sh_size);
670 bfd_set_error (bfd_error_bad_value);
672 /* PR 17510: If the group contents are even
673 partially corrupt, do not allow any of the
674 contents to be used. */
675 memset (shdr->contents, 0, amt);
679 /* Translate raw contents, a flag word followed by an
680 array of elf section indices all in target byte order,
681 to the flag word followed by an array of elf section
683 src = shdr->contents + shdr->sh_size;
684 dest = (Elf_Internal_Group *) (shdr->contents + amt);
692 idx = H_GET_32 (abfd, src);
693 if (src == shdr->contents)
696 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
697 shdr->bfd_section->flags
698 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
704 (_("%B: invalid SHT_GROUP entry"), abfd);
707 dest->shdr = elf_elfsections (abfd)[idx];
712 /* PR 17510: Corrupt binaries might contain invalid groups. */
713 if (num_group != (unsigned) elf_tdata (abfd)->num_group)
715 elf_tdata (abfd)->num_group = num_group;
717 /* If all groups are invalid then fail. */
720 elf_tdata (abfd)->group_sect_ptr = NULL;
721 elf_tdata (abfd)->num_group = num_group = -1;
723 (_("%B: no valid group sections found"), abfd);
724 bfd_set_error (bfd_error_bad_value);
730 if (num_group != (unsigned) -1)
734 for (i = 0; i < num_group; i++)
736 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
737 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
738 unsigned int n_elt = shdr->sh_size / 4;
740 /* Look through this group's sections to see if current
741 section is a member. */
743 if ((++idx)->shdr == hdr)
747 /* We are a member of this group. Go looking through
748 other members to see if any others are linked via
750 idx = (Elf_Internal_Group *) shdr->contents;
751 n_elt = shdr->sh_size / 4;
753 if ((s = (++idx)->shdr->bfd_section) != NULL
754 && elf_next_in_group (s) != NULL)
758 /* Snarf the group name from other member, and
759 insert current section in circular list. */
760 elf_group_name (newsect) = elf_group_name (s);
761 elf_next_in_group (newsect) = elf_next_in_group (s);
762 elf_next_in_group (s) = newsect;
768 gname = group_signature (abfd, shdr);
771 elf_group_name (newsect) = gname;
773 /* Start a circular list with one element. */
774 elf_next_in_group (newsect) = newsect;
777 /* If the group section has been created, point to the
779 if (shdr->bfd_section != NULL)
780 elf_next_in_group (shdr->bfd_section) = newsect;
788 if (elf_group_name (newsect) == NULL)
790 /* xgettext:c-format */
791 _bfd_error_handler (_("%B: no group info for section %A"),
799 _bfd_elf_setup_sections (bfd *abfd)
802 unsigned int num_group = elf_tdata (abfd)->num_group;
803 bfd_boolean result = TRUE;
806 /* Process SHF_LINK_ORDER. */
807 for (s = abfd->sections; s != NULL; s = s->next)
809 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
810 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
812 unsigned int elfsec = this_hdr->sh_link;
813 /* FIXME: The old Intel compiler and old strip/objcopy may
814 not set the sh_link or sh_info fields. Hence we could
815 get the situation where elfsec is 0. */
818 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
819 if (bed->link_order_error_handler)
820 bed->link_order_error_handler
821 /* xgettext:c-format */
822 (_("%B: warning: sh_link not set for section `%A'"),
827 asection *linksec = NULL;
829 if (elfsec < elf_numsections (abfd))
831 this_hdr = elf_elfsections (abfd)[elfsec];
832 linksec = this_hdr->bfd_section;
836 Some strip/objcopy may leave an incorrect value in
837 sh_link. We don't want to proceed. */
841 /* xgettext:c-format */
842 (_("%B: sh_link [%d] in section `%A' is incorrect"),
843 s->owner, elfsec, s);
847 elf_linked_to_section (s) = linksec;
850 else if (this_hdr->sh_type == SHT_GROUP
851 && elf_next_in_group (s) == NULL)
854 /* xgettext:c-format */
855 (_("%B: SHT_GROUP section [index %d] has no SHF_GROUP sections"),
856 abfd, elf_section_data (s)->this_idx);
861 /* Process section groups. */
862 if (num_group == (unsigned) -1)
865 for (i = 0; i < num_group; i++)
867 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
868 Elf_Internal_Group *idx;
871 /* PR binutils/18758: Beware of corrupt binaries with invalid group data. */
872 if (shdr == NULL || shdr->bfd_section == NULL || shdr->contents == NULL)
875 /* xgettext:c-format */
876 (_("%B: section group entry number %u is corrupt"),
882 idx = (Elf_Internal_Group *) shdr->contents;
883 n_elt = shdr->sh_size / 4;
886 if ((++idx)->shdr->bfd_section)
887 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
888 else if (idx->shdr->sh_type == SHT_RELA
889 || idx->shdr->sh_type == SHT_REL)
890 /* We won't include relocation sections in section groups in
891 output object files. We adjust the group section size here
892 so that relocatable link will work correctly when
893 relocation sections are in section group in input object
895 shdr->bfd_section->size -= 4;
898 /* There are some unknown sections in the group. */
900 /* xgettext:c-format */
901 (_("%B: unknown [%d] section `%s' in group [%A]"),
903 (unsigned int) idx->shdr->sh_type,
904 bfd_elf_string_from_elf_section (abfd,
905 (elf_elfheader (abfd)
916 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
918 return elf_next_in_group (sec) != NULL;
922 convert_debug_to_zdebug (bfd *abfd, const char *name)
924 unsigned int len = strlen (name);
925 char *new_name = bfd_alloc (abfd, len + 2);
926 if (new_name == NULL)
930 memcpy (new_name + 2, name + 1, len);
935 convert_zdebug_to_debug (bfd *abfd, const char *name)
937 unsigned int len = strlen (name);
938 char *new_name = bfd_alloc (abfd, len);
939 if (new_name == NULL)
942 memcpy (new_name + 1, name + 2, len - 1);
946 /* Make a BFD section from an ELF section. We store a pointer to the
947 BFD section in the bfd_section field of the header. */
950 _bfd_elf_make_section_from_shdr (bfd *abfd,
951 Elf_Internal_Shdr *hdr,
957 const struct elf_backend_data *bed;
959 if (hdr->bfd_section != NULL)
962 newsect = bfd_make_section_anyway (abfd, name);
966 hdr->bfd_section = newsect;
967 elf_section_data (newsect)->this_hdr = *hdr;
968 elf_section_data (newsect)->this_idx = shindex;
970 /* Always use the real type/flags. */
971 elf_section_type (newsect) = hdr->sh_type;
972 elf_section_flags (newsect) = hdr->sh_flags;
974 newsect->filepos = hdr->sh_offset;
976 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
977 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
978 || ! bfd_set_section_alignment (abfd, newsect,
979 bfd_log2 (hdr->sh_addralign)))
982 flags = SEC_NO_FLAGS;
983 if (hdr->sh_type != SHT_NOBITS)
984 flags |= SEC_HAS_CONTENTS;
985 if (hdr->sh_type == SHT_GROUP)
987 if ((hdr->sh_flags & SHF_ALLOC) != 0)
990 if (hdr->sh_type != SHT_NOBITS)
993 if ((hdr->sh_flags & SHF_WRITE) == 0)
994 flags |= SEC_READONLY;
995 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
997 else if ((flags & SEC_LOAD) != 0)
999 if ((hdr->sh_flags & SHF_MERGE) != 0)
1002 newsect->entsize = hdr->sh_entsize;
1004 if ((hdr->sh_flags & SHF_STRINGS) != 0)
1005 flags |= SEC_STRINGS;
1006 if (hdr->sh_flags & SHF_GROUP)
1007 if (!setup_group (abfd, hdr, newsect))
1009 if ((hdr->sh_flags & SHF_TLS) != 0)
1010 flags |= SEC_THREAD_LOCAL;
1011 if ((hdr->sh_flags & SHF_EXCLUDE) != 0)
1012 flags |= SEC_EXCLUDE;
1014 if ((flags & SEC_ALLOC) == 0)
1016 /* The debugging sections appear to be recognized only by name,
1017 not any sort of flag. Their SEC_ALLOC bits are cleared. */
1018 if (name [0] == '.')
1023 p = ".debug", n = 6;
1024 else if (name[1] == 'g' && name[2] == 'n')
1025 p = ".gnu.linkonce.wi.", n = 17;
1026 else if (name[1] == 'g' && name[2] == 'd')
1027 p = ".gdb_index", n = 11; /* yes we really do mean 11. */
1028 else if (name[1] == 'l')
1030 else if (name[1] == 's')
1032 else if (name[1] == 'z')
1033 p = ".zdebug", n = 7;
1036 if (p != NULL && strncmp (name, p, n) == 0)
1037 flags |= SEC_DEBUGGING;
1041 /* As a GNU extension, if the name begins with .gnu.linkonce, we
1042 only link a single copy of the section. This is used to support
1043 g++. g++ will emit each template expansion in its own section.
1044 The symbols will be defined as weak, so that multiple definitions
1045 are permitted. The GNU linker extension is to actually discard
1046 all but one of the sections. */
1047 if (CONST_STRNEQ (name, ".gnu.linkonce")
1048 && elf_next_in_group (newsect) == NULL)
1049 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1051 bed = get_elf_backend_data (abfd);
1052 if (bed->elf_backend_section_flags)
1053 if (! bed->elf_backend_section_flags (&flags, hdr))
1056 if (! bfd_set_section_flags (abfd, newsect, flags))
1059 /* We do not parse the PT_NOTE segments as we are interested even in the
1060 separate debug info files which may have the segments offsets corrupted.
1061 PT_NOTEs from the core files are currently not parsed using BFD. */
1062 if (hdr->sh_type == SHT_NOTE)
1066 if (!bfd_malloc_and_get_section (abfd, newsect, &contents))
1069 elf_parse_notes (abfd, (char *) contents, hdr->sh_size, hdr->sh_offset);
1073 if ((flags & SEC_ALLOC) != 0)
1075 Elf_Internal_Phdr *phdr;
1076 unsigned int i, nload;
1078 /* Some ELF linkers produce binaries with all the program header
1079 p_paddr fields zero. If we have such a binary with more than
1080 one PT_LOAD header, then leave the section lma equal to vma
1081 so that we don't create sections with overlapping lma. */
1082 phdr = elf_tdata (abfd)->phdr;
1083 for (nload = 0, i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
1084 if (phdr->p_paddr != 0)
1086 else if (phdr->p_type == PT_LOAD && phdr->p_memsz != 0)
1088 if (i >= elf_elfheader (abfd)->e_phnum && nload > 1)
1091 phdr = elf_tdata (abfd)->phdr;
1092 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
1094 if (((phdr->p_type == PT_LOAD
1095 && (hdr->sh_flags & SHF_TLS) == 0)
1096 || phdr->p_type == PT_TLS)
1097 && ELF_SECTION_IN_SEGMENT (hdr, phdr))
1099 if ((flags & SEC_LOAD) == 0)
1100 newsect->lma = (phdr->p_paddr
1101 + hdr->sh_addr - phdr->p_vaddr);
1103 /* We used to use the same adjustment for SEC_LOAD
1104 sections, but that doesn't work if the segment
1105 is packed with code from multiple VMAs.
1106 Instead we calculate the section LMA based on
1107 the segment LMA. It is assumed that the
1108 segment will contain sections with contiguous
1109 LMAs, even if the VMAs are not. */
1110 newsect->lma = (phdr->p_paddr
1111 + hdr->sh_offset - phdr->p_offset);
1113 /* With contiguous segments, we can't tell from file
1114 offsets whether a section with zero size should
1115 be placed at the end of one segment or the
1116 beginning of the next. Decide based on vaddr. */
1117 if (hdr->sh_addr >= phdr->p_vaddr
1118 && (hdr->sh_addr + hdr->sh_size
1119 <= phdr->p_vaddr + phdr->p_memsz))
1125 /* Compress/decompress DWARF debug sections with names: .debug_* and
1126 .zdebug_*, after the section flags is set. */
1127 if ((flags & SEC_DEBUGGING)
1128 && ((name[1] == 'd' && name[6] == '_')
1129 || (name[1] == 'z' && name[7] == '_')))
1131 enum { nothing, compress, decompress } action = nothing;
1132 int compression_header_size;
1133 bfd_size_type uncompressed_size;
1134 bfd_boolean compressed
1135 = bfd_is_section_compressed_with_header (abfd, newsect,
1136 &compression_header_size,
1137 &uncompressed_size);
1141 /* Compressed section. Check if we should decompress. */
1142 if ((abfd->flags & BFD_DECOMPRESS))
1143 action = decompress;
1146 /* Compress the uncompressed section or convert from/to .zdebug*
1147 section. Check if we should compress. */
1148 if (action == nothing)
1150 if (newsect->size != 0
1151 && (abfd->flags & BFD_COMPRESS)
1152 && compression_header_size >= 0
1153 && uncompressed_size > 0
1155 || ((compression_header_size > 0)
1156 != ((abfd->flags & BFD_COMPRESS_GABI) != 0))))
1162 if (action == compress)
1164 if (!bfd_init_section_compress_status (abfd, newsect))
1167 /* xgettext:c-format */
1168 (_("%B: unable to initialize compress status for section %s"),
1175 if (!bfd_init_section_decompress_status (abfd, newsect))
1178 /* xgettext:c-format */
1179 (_("%B: unable to initialize decompress status for section %s"),
1185 if (abfd->is_linker_input)
1188 && (action == decompress
1189 || (action == compress
1190 && (abfd->flags & BFD_COMPRESS_GABI) != 0)))
1192 /* Convert section name from .zdebug_* to .debug_* so
1193 that linker will consider this section as a debug
1195 char *new_name = convert_zdebug_to_debug (abfd, name);
1196 if (new_name == NULL)
1198 bfd_rename_section (abfd, newsect, new_name);
1202 /* For objdump, don't rename the section. For objcopy, delay
1203 section rename to elf_fake_sections. */
1204 newsect->flags |= SEC_ELF_RENAME;
1210 const char *const bfd_elf_section_type_names[] =
1212 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1213 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1214 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1217 /* ELF relocs are against symbols. If we are producing relocatable
1218 output, and the reloc is against an external symbol, and nothing
1219 has given us any additional addend, the resulting reloc will also
1220 be against the same symbol. In such a case, we don't want to
1221 change anything about the way the reloc is handled, since it will
1222 all be done at final link time. Rather than put special case code
1223 into bfd_perform_relocation, all the reloc types use this howto
1224 function. It just short circuits the reloc if producing
1225 relocatable output against an external symbol. */
1227 bfd_reloc_status_type
1228 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1229 arelent *reloc_entry,
1231 void *data ATTRIBUTE_UNUSED,
1232 asection *input_section,
1234 char **error_message ATTRIBUTE_UNUSED)
1236 if (output_bfd != NULL
1237 && (symbol->flags & BSF_SECTION_SYM) == 0
1238 && (! reloc_entry->howto->partial_inplace
1239 || reloc_entry->addend == 0))
1241 reloc_entry->address += input_section->output_offset;
1242 return bfd_reloc_ok;
1245 return bfd_reloc_continue;
1248 /* Returns TRUE if section A matches section B.
1249 Names, addresses and links may be different, but everything else
1250 should be the same. */
1253 section_match (const Elf_Internal_Shdr * a,
1254 const Elf_Internal_Shdr * b)
1257 a->sh_type == b->sh_type
1258 && (a->sh_flags & ~ SHF_INFO_LINK)
1259 == (b->sh_flags & ~ SHF_INFO_LINK)
1260 && a->sh_addralign == b->sh_addralign
1261 && a->sh_size == b->sh_size
1262 && a->sh_entsize == b->sh_entsize
1263 /* FIXME: Check sh_addr ? */
1267 /* Find a section in OBFD that has the same characteristics
1268 as IHEADER. Return the index of this section or SHN_UNDEF if
1269 none can be found. Check's section HINT first, as this is likely
1270 to be the correct section. */
1273 find_link (const bfd * obfd, const Elf_Internal_Shdr * iheader, const unsigned int hint)
1275 Elf_Internal_Shdr ** oheaders = elf_elfsections (obfd);
1278 BFD_ASSERT (iheader != NULL);
1280 /* See PR 20922 for a reproducer of the NULL test. */
1281 if (oheaders[hint] != NULL
1282 && section_match (oheaders[hint], iheader))
1285 for (i = 1; i < elf_numsections (obfd); i++)
1287 Elf_Internal_Shdr * oheader = oheaders[i];
1289 if (oheader == NULL)
1291 if (section_match (oheader, iheader))
1292 /* FIXME: Do we care if there is a potential for
1293 multiple matches ? */
1300 /* PR 19938: Attempt to set the ELF section header fields of an OS or
1301 Processor specific section, based upon a matching input section.
1302 Returns TRUE upon success, FALSE otherwise. */
1305 copy_special_section_fields (const bfd *ibfd,
1307 const Elf_Internal_Shdr *iheader,
1308 Elf_Internal_Shdr *oheader,
1309 const unsigned int secnum)
1311 const struct elf_backend_data *bed = get_elf_backend_data (obfd);
1312 const Elf_Internal_Shdr **iheaders = (const Elf_Internal_Shdr **) elf_elfsections (ibfd);
1313 bfd_boolean changed = FALSE;
1314 unsigned int sh_link;
1316 if (oheader->sh_type == SHT_NOBITS)
1318 /* This is a feature for objcopy --only-keep-debug:
1319 When a section's type is changed to NOBITS, we preserve
1320 the sh_link and sh_info fields so that they can be
1321 matched up with the original.
1323 Note: Strictly speaking these assignments are wrong.
1324 The sh_link and sh_info fields should point to the
1325 relevent sections in the output BFD, which may not be in
1326 the same location as they were in the input BFD. But
1327 the whole point of this action is to preserve the
1328 original values of the sh_link and sh_info fields, so
1329 that they can be matched up with the section headers in
1330 the original file. So strictly speaking we may be
1331 creating an invalid ELF file, but it is only for a file
1332 that just contains debug info and only for sections
1333 without any contents. */
1334 if (oheader->sh_link == 0)
1335 oheader->sh_link = iheader->sh_link;
1336 if (oheader->sh_info == 0)
1337 oheader->sh_info = iheader->sh_info;
1341 /* Allow the target a chance to decide how these fields should be set. */
1342 if (bed->elf_backend_copy_special_section_fields != NULL
1343 && bed->elf_backend_copy_special_section_fields
1344 (ibfd, obfd, iheader, oheader))
1347 /* We have an iheader which might match oheader, and which has non-zero
1348 sh_info and/or sh_link fields. Attempt to follow those links and find
1349 the section in the output bfd which corresponds to the linked section
1350 in the input bfd. */
1351 if (iheader->sh_link != SHN_UNDEF)
1353 /* See PR 20931 for a reproducer. */
1354 if (iheader->sh_link >= elf_numsections (ibfd))
1356 (* _bfd_error_handler)
1357 /* xgettext:c-format */
1358 (_("%B: Invalid sh_link field (%d) in section number %d"),
1359 ibfd, iheader->sh_link, secnum);
1363 sh_link = find_link (obfd, iheaders[iheader->sh_link], iheader->sh_link);
1364 if (sh_link != SHN_UNDEF)
1366 oheader->sh_link = sh_link;
1370 /* FIXME: Should we install iheader->sh_link
1371 if we could not find a match ? */
1372 (* _bfd_error_handler)
1373 /* xgettext:c-format */
1374 (_("%B: Failed to find link section for section %d"), obfd, secnum);
1377 if (iheader->sh_info)
1379 /* The sh_info field can hold arbitrary information, but if the
1380 SHF_LINK_INFO flag is set then it should be interpreted as a
1382 if (iheader->sh_flags & SHF_INFO_LINK)
1384 sh_link = find_link (obfd, iheaders[iheader->sh_info],
1386 if (sh_link != SHN_UNDEF)
1387 oheader->sh_flags |= SHF_INFO_LINK;
1390 /* No idea what it means - just copy it. */
1391 sh_link = iheader->sh_info;
1393 if (sh_link != SHN_UNDEF)
1395 oheader->sh_info = sh_link;
1399 (* _bfd_error_handler)
1400 /* xgettext:c-format */
1401 (_("%B: Failed to find info section for section %d"), obfd, secnum);
1407 /* Copy the program header and other data from one object module to
1411 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1413 const Elf_Internal_Shdr **iheaders = (const Elf_Internal_Shdr **) elf_elfsections (ibfd);
1414 Elf_Internal_Shdr **oheaders = elf_elfsections (obfd);
1415 const struct elf_backend_data *bed;
1418 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1419 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1422 if (!elf_flags_init (obfd))
1424 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1425 elf_flags_init (obfd) = TRUE;
1428 elf_gp (obfd) = elf_gp (ibfd);
1430 /* Also copy the EI_OSABI field. */
1431 elf_elfheader (obfd)->e_ident[EI_OSABI] =
1432 elf_elfheader (ibfd)->e_ident[EI_OSABI];
1434 /* If set, copy the EI_ABIVERSION field. */
1435 if (elf_elfheader (ibfd)->e_ident[EI_ABIVERSION])
1436 elf_elfheader (obfd)->e_ident[EI_ABIVERSION]
1437 = elf_elfheader (ibfd)->e_ident[EI_ABIVERSION];
1439 /* Copy object attributes. */
1440 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1442 if (iheaders == NULL || oheaders == NULL)
1445 bed = get_elf_backend_data (obfd);
1447 /* Possibly copy other fields in the section header. */
1448 for (i = 1; i < elf_numsections (obfd); i++)
1451 Elf_Internal_Shdr * oheader = oheaders[i];
1453 /* Ignore ordinary sections. SHT_NOBITS sections are considered however
1454 because of a special case need for generating separate debug info
1455 files. See below for more details. */
1457 || (oheader->sh_type != SHT_NOBITS
1458 && oheader->sh_type < SHT_LOOS))
1461 /* Ignore empty sections, and sections whose
1462 fields have already been initialised. */
1463 if (oheader->sh_size == 0
1464 || (oheader->sh_info != 0 && oheader->sh_link != 0))
1467 /* Scan for the matching section in the input bfd.
1468 First we try for a direct mapping between the input and output sections. */
1469 for (j = 1; j < elf_numsections (ibfd); j++)
1471 const Elf_Internal_Shdr * iheader = iheaders[j];
1473 if (iheader == NULL)
1476 if (oheader->bfd_section != NULL
1477 && iheader->bfd_section != NULL
1478 && iheader->bfd_section->output_section != NULL
1479 && iheader->bfd_section->output_section == oheader->bfd_section)
1481 /* We have found a connection from the input section to the
1482 output section. Attempt to copy the header fields. If
1483 this fails then do not try any further sections - there
1484 should only be a one-to-one mapping between input and output. */
1485 if (! copy_special_section_fields (ibfd, obfd, iheader, oheader, i))
1486 j = elf_numsections (ibfd);
1491 if (j < elf_numsections (ibfd))
1494 /* That failed. So try to deduce the corresponding input section.
1495 Unfortunately we cannot compare names as the output string table
1496 is empty, so instead we check size, address and type. */
1497 for (j = 1; j < elf_numsections (ibfd); j++)
1499 const Elf_Internal_Shdr * iheader = iheaders[j];
1501 if (iheader == NULL)
1504 /* Try matching fields in the input section's header.
1505 Since --only-keep-debug turns all non-debug sections into
1506 SHT_NOBITS sections, the output SHT_NOBITS type matches any
1508 if ((oheader->sh_type == SHT_NOBITS
1509 || iheader->sh_type == oheader->sh_type)
1510 && (iheader->sh_flags & ~ SHF_INFO_LINK)
1511 == (oheader->sh_flags & ~ SHF_INFO_LINK)
1512 && iheader->sh_addralign == oheader->sh_addralign
1513 && iheader->sh_entsize == oheader->sh_entsize
1514 && iheader->sh_size == oheader->sh_size
1515 && iheader->sh_addr == oheader->sh_addr
1516 && (iheader->sh_info != oheader->sh_info
1517 || iheader->sh_link != oheader->sh_link))
1519 if (copy_special_section_fields (ibfd, obfd, iheader, oheader, i))
1524 if (j == elf_numsections (ibfd) && oheader->sh_type >= SHT_LOOS)
1526 /* Final attempt. Call the backend copy function
1527 with a NULL input section. */
1528 if (bed->elf_backend_copy_special_section_fields != NULL)
1529 bed->elf_backend_copy_special_section_fields (ibfd, obfd, NULL, oheader);
1537 get_segment_type (unsigned int p_type)
1542 case PT_NULL: pt = "NULL"; break;
1543 case PT_LOAD: pt = "LOAD"; break;
1544 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1545 case PT_INTERP: pt = "INTERP"; break;
1546 case PT_NOTE: pt = "NOTE"; break;
1547 case PT_SHLIB: pt = "SHLIB"; break;
1548 case PT_PHDR: pt = "PHDR"; break;
1549 case PT_TLS: pt = "TLS"; break;
1550 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1551 case PT_GNU_STACK: pt = "STACK"; break;
1552 case PT_GNU_RELRO: pt = "RELRO"; break;
1553 default: pt = NULL; break;
1558 /* Print out the program headers. */
1561 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1563 FILE *f = (FILE *) farg;
1564 Elf_Internal_Phdr *p;
1566 bfd_byte *dynbuf = NULL;
1568 p = elf_tdata (abfd)->phdr;
1573 fprintf (f, _("\nProgram Header:\n"));
1574 c = elf_elfheader (abfd)->e_phnum;
1575 for (i = 0; i < c; i++, p++)
1577 const char *pt = get_segment_type (p->p_type);
1582 sprintf (buf, "0x%lx", p->p_type);
1585 fprintf (f, "%8s off 0x", pt);
1586 bfd_fprintf_vma (abfd, f, p->p_offset);
1587 fprintf (f, " vaddr 0x");
1588 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1589 fprintf (f, " paddr 0x");
1590 bfd_fprintf_vma (abfd, f, p->p_paddr);
1591 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1592 fprintf (f, " filesz 0x");
1593 bfd_fprintf_vma (abfd, f, p->p_filesz);
1594 fprintf (f, " memsz 0x");
1595 bfd_fprintf_vma (abfd, f, p->p_memsz);
1596 fprintf (f, " flags %c%c%c",
1597 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1598 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1599 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1600 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1601 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1606 s = bfd_get_section_by_name (abfd, ".dynamic");
1609 unsigned int elfsec;
1610 unsigned long shlink;
1611 bfd_byte *extdyn, *extdynend;
1613 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1615 fprintf (f, _("\nDynamic Section:\n"));
1617 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1620 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1621 if (elfsec == SHN_BAD)
1623 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1625 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1626 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1629 /* PR 17512: file: 6f427532. */
1630 if (s->size < extdynsize)
1632 extdynend = extdyn + s->size;
1633 /* PR 17512: file: id:000006,sig:06,src:000000,op:flip4,pos:5664.
1635 for (; extdyn <= (extdynend - extdynsize); extdyn += extdynsize)
1637 Elf_Internal_Dyn dyn;
1638 const char *name = "";
1640 bfd_boolean stringp;
1641 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1643 (*swap_dyn_in) (abfd, extdyn, &dyn);
1645 if (dyn.d_tag == DT_NULL)
1652 if (bed->elf_backend_get_target_dtag)
1653 name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag);
1655 if (!strcmp (name, ""))
1657 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1662 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1663 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1664 case DT_PLTGOT: name = "PLTGOT"; break;
1665 case DT_HASH: name = "HASH"; break;
1666 case DT_STRTAB: name = "STRTAB"; break;
1667 case DT_SYMTAB: name = "SYMTAB"; break;
1668 case DT_RELA: name = "RELA"; break;
1669 case DT_RELASZ: name = "RELASZ"; break;
1670 case DT_RELAENT: name = "RELAENT"; break;
1671 case DT_STRSZ: name = "STRSZ"; break;
1672 case DT_SYMENT: name = "SYMENT"; break;
1673 case DT_INIT: name = "INIT"; break;
1674 case DT_FINI: name = "FINI"; break;
1675 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1676 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1677 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1678 case DT_REL: name = "REL"; break;
1679 case DT_RELSZ: name = "RELSZ"; break;
1680 case DT_RELENT: name = "RELENT"; break;
1681 case DT_PLTREL: name = "PLTREL"; break;
1682 case DT_DEBUG: name = "DEBUG"; break;
1683 case DT_TEXTREL: name = "TEXTREL"; break;
1684 case DT_JMPREL: name = "JMPREL"; break;
1685 case DT_BIND_NOW: name = "BIND_NOW"; break;
1686 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1687 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1688 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1689 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1690 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1691 case DT_FLAGS: name = "FLAGS"; break;
1692 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1693 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1694 case DT_CHECKSUM: name = "CHECKSUM"; break;
1695 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1696 case DT_MOVEENT: name = "MOVEENT"; break;
1697 case DT_MOVESZ: name = "MOVESZ"; break;
1698 case DT_FEATURE: name = "FEATURE"; break;
1699 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1700 case DT_SYMINSZ: name = "SYMINSZ"; break;
1701 case DT_SYMINENT: name = "SYMINENT"; break;
1702 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1703 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1704 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1705 case DT_PLTPAD: name = "PLTPAD"; break;
1706 case DT_MOVETAB: name = "MOVETAB"; break;
1707 case DT_SYMINFO: name = "SYMINFO"; break;
1708 case DT_RELACOUNT: name = "RELACOUNT"; break;
1709 case DT_RELCOUNT: name = "RELCOUNT"; break;
1710 case DT_FLAGS_1: name = "FLAGS_1"; break;
1711 case DT_VERSYM: name = "VERSYM"; break;
1712 case DT_VERDEF: name = "VERDEF"; break;
1713 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1714 case DT_VERNEED: name = "VERNEED"; break;
1715 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1716 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1717 case DT_USED: name = "USED"; break;
1718 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1719 case DT_GNU_HASH: name = "GNU_HASH"; break;
1722 fprintf (f, " %-20s ", name);
1726 bfd_fprintf_vma (abfd, f, dyn.d_un.d_val);
1731 unsigned int tagv = dyn.d_un.d_val;
1733 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1736 fprintf (f, "%s", string);
1745 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1746 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1748 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1752 if (elf_dynverdef (abfd) != 0)
1754 Elf_Internal_Verdef *t;
1756 fprintf (f, _("\nVersion definitions:\n"));
1757 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1759 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1760 t->vd_flags, t->vd_hash,
1761 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1762 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1764 Elf_Internal_Verdaux *a;
1767 for (a = t->vd_auxptr->vda_nextptr;
1771 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1777 if (elf_dynverref (abfd) != 0)
1779 Elf_Internal_Verneed *t;
1781 fprintf (f, _("\nVersion References:\n"));
1782 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1784 Elf_Internal_Vernaux *a;
1786 fprintf (f, _(" required from %s:\n"),
1787 t->vn_filename ? t->vn_filename : "<corrupt>");
1788 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1789 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1790 a->vna_flags, a->vna_other,
1791 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1803 /* Get version string. */
1806 _bfd_elf_get_symbol_version_string (bfd *abfd, asymbol *symbol,
1807 bfd_boolean *hidden)
1809 const char *version_string = NULL;
1810 if (elf_dynversym (abfd) != 0
1811 && (elf_dynverdef (abfd) != 0 || elf_dynverref (abfd) != 0))
1813 unsigned int vernum = ((elf_symbol_type *) symbol)->version;
1815 *hidden = (vernum & VERSYM_HIDDEN) != 0;
1816 vernum &= VERSYM_VERSION;
1819 version_string = "";
1820 else if (vernum == 1)
1821 version_string = "Base";
1822 else if (vernum <= elf_tdata (abfd)->cverdefs)
1824 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1827 Elf_Internal_Verneed *t;
1829 version_string = "";
1830 for (t = elf_tdata (abfd)->verref;
1834 Elf_Internal_Vernaux *a;
1836 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1838 if (a->vna_other == vernum)
1840 version_string = a->vna_nodename;
1847 return version_string;
1850 /* Display ELF-specific fields of a symbol. */
1853 bfd_elf_print_symbol (bfd *abfd,
1856 bfd_print_symbol_type how)
1858 FILE *file = (FILE *) filep;
1861 case bfd_print_symbol_name:
1862 fprintf (file, "%s", symbol->name);
1864 case bfd_print_symbol_more:
1865 fprintf (file, "elf ");
1866 bfd_fprintf_vma (abfd, file, symbol->value);
1867 fprintf (file, " %lx", (unsigned long) symbol->flags);
1869 case bfd_print_symbol_all:
1871 const char *section_name;
1872 const char *name = NULL;
1873 const struct elf_backend_data *bed;
1874 unsigned char st_other;
1876 const char *version_string;
1879 section_name = symbol->section ? symbol->section->name : "(*none*)";
1881 bed = get_elf_backend_data (abfd);
1882 if (bed->elf_backend_print_symbol_all)
1883 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1887 name = symbol->name;
1888 bfd_print_symbol_vandf (abfd, file, symbol);
1891 fprintf (file, " %s\t", section_name);
1892 /* Print the "other" value for a symbol. For common symbols,
1893 we've already printed the size; now print the alignment.
1894 For other symbols, we have no specified alignment, and
1895 we've printed the address; now print the size. */
1896 if (symbol->section && bfd_is_com_section (symbol->section))
1897 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1899 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1900 bfd_fprintf_vma (abfd, file, val);
1902 /* If we have version information, print it. */
1903 version_string = _bfd_elf_get_symbol_version_string (abfd,
1909 fprintf (file, " %-11s", version_string);
1914 fprintf (file, " (%s)", version_string);
1915 for (i = 10 - strlen (version_string); i > 0; --i)
1920 /* If the st_other field is not zero, print it. */
1921 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1926 case STV_INTERNAL: fprintf (file, " .internal"); break;
1927 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1928 case STV_PROTECTED: fprintf (file, " .protected"); break;
1930 /* Some other non-defined flags are also present, so print
1932 fprintf (file, " 0x%02x", (unsigned int) st_other);
1935 fprintf (file, " %s", name);
1941 /* ELF .o/exec file reading */
1943 /* Create a new bfd section from an ELF section header. */
1946 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1948 Elf_Internal_Shdr *hdr;
1949 Elf_Internal_Ehdr *ehdr;
1950 const struct elf_backend_data *bed;
1952 bfd_boolean ret = TRUE;
1953 static bfd_boolean * sections_being_created = NULL;
1954 static bfd * sections_being_created_abfd = NULL;
1955 static unsigned int nesting = 0;
1957 if (shindex >= elf_numsections (abfd))
1962 /* PR17512: A corrupt ELF binary might contain a recursive group of
1963 sections, with each the string indicies pointing to the next in the
1964 loop. Detect this here, by refusing to load a section that we are
1965 already in the process of loading. We only trigger this test if
1966 we have nested at least three sections deep as normal ELF binaries
1967 can expect to recurse at least once.
1969 FIXME: It would be better if this array was attached to the bfd,
1970 rather than being held in a static pointer. */
1972 if (sections_being_created_abfd != abfd)
1973 sections_being_created = NULL;
1974 if (sections_being_created == NULL)
1976 /* FIXME: It would be more efficient to attach this array to the bfd somehow. */
1977 sections_being_created = (bfd_boolean *)
1978 bfd_zalloc (abfd, elf_numsections (abfd) * sizeof (bfd_boolean));
1979 sections_being_created_abfd = abfd;
1981 if (sections_being_created [shindex])
1984 (_("%B: warning: loop in section dependencies detected"), abfd);
1987 sections_being_created [shindex] = TRUE;
1990 hdr = elf_elfsections (abfd)[shindex];
1991 ehdr = elf_elfheader (abfd);
1992 name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx,
1997 bed = get_elf_backend_data (abfd);
1998 switch (hdr->sh_type)
2001 /* Inactive section. Throw it away. */
2004 case SHT_PROGBITS: /* Normal section with contents. */
2005 case SHT_NOBITS: /* .bss section. */
2006 case SHT_HASH: /* .hash section. */
2007 case SHT_NOTE: /* .note section. */
2008 case SHT_INIT_ARRAY: /* .init_array section. */
2009 case SHT_FINI_ARRAY: /* .fini_array section. */
2010 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
2011 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
2012 case SHT_GNU_HASH: /* .gnu.hash section. */
2013 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2016 case SHT_DYNAMIC: /* Dynamic linking information. */
2017 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2020 if (hdr->sh_link > elf_numsections (abfd))
2022 /* PR 10478: Accept Solaris binaries with a sh_link
2023 field set to SHN_BEFORE or SHN_AFTER. */
2024 switch (bfd_get_arch (abfd))
2027 case bfd_arch_sparc:
2028 if (hdr->sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
2029 || hdr->sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
2031 /* Otherwise fall through. */
2036 else if (elf_elfsections (abfd)[hdr->sh_link] == NULL)
2038 else if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
2040 Elf_Internal_Shdr *dynsymhdr;
2042 /* The shared libraries distributed with hpux11 have a bogus
2043 sh_link field for the ".dynamic" section. Find the
2044 string table for the ".dynsym" section instead. */
2045 if (elf_dynsymtab (abfd) != 0)
2047 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
2048 hdr->sh_link = dynsymhdr->sh_link;
2052 unsigned int i, num_sec;
2054 num_sec = elf_numsections (abfd);
2055 for (i = 1; i < num_sec; i++)
2057 dynsymhdr = elf_elfsections (abfd)[i];
2058 if (dynsymhdr->sh_type == SHT_DYNSYM)
2060 hdr->sh_link = dynsymhdr->sh_link;
2068 case SHT_SYMTAB: /* A symbol table. */
2069 if (elf_onesymtab (abfd) == shindex)
2072 if (hdr->sh_entsize != bed->s->sizeof_sym)
2075 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
2077 if (hdr->sh_size != 0)
2079 /* Some assemblers erroneously set sh_info to one with a
2080 zero sh_size. ld sees this as a global symbol count
2081 of (unsigned) -1. Fix it here. */
2086 /* PR 18854: A binary might contain more than one symbol table.
2087 Unusual, but possible. Warn, but continue. */
2088 if (elf_onesymtab (abfd) != 0)
2091 /* xgettext:c-format */
2092 (_("%B: warning: multiple symbol tables detected"
2093 " - ignoring the table in section %u"),
2097 elf_onesymtab (abfd) = shindex;
2098 elf_symtab_hdr (abfd) = *hdr;
2099 elf_elfsections (abfd)[shindex] = hdr = & elf_symtab_hdr (abfd);
2100 abfd->flags |= HAS_SYMS;
2102 /* Sometimes a shared object will map in the symbol table. If
2103 SHF_ALLOC is set, and this is a shared object, then we also
2104 treat this section as a BFD section. We can not base the
2105 decision purely on SHF_ALLOC, because that flag is sometimes
2106 set in a relocatable object file, which would confuse the
2108 if ((hdr->sh_flags & SHF_ALLOC) != 0
2109 && (abfd->flags & DYNAMIC) != 0
2110 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2114 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
2115 can't read symbols without that section loaded as well. It
2116 is most likely specified by the next section header. */
2118 elf_section_list * entry;
2119 unsigned int i, num_sec;
2121 for (entry = elf_symtab_shndx_list (abfd); entry != NULL; entry = entry->next)
2122 if (entry->hdr.sh_link == shindex)
2125 num_sec = elf_numsections (abfd);
2126 for (i = shindex + 1; i < num_sec; i++)
2128 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2130 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
2131 && hdr2->sh_link == shindex)
2136 for (i = 1; i < shindex; i++)
2138 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2140 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
2141 && hdr2->sh_link == shindex)
2146 ret = bfd_section_from_shdr (abfd, i);
2147 /* else FIXME: we have failed to find the symbol table - should we issue an error ? */
2151 case SHT_DYNSYM: /* A dynamic symbol table. */
2152 if (elf_dynsymtab (abfd) == shindex)
2155 if (hdr->sh_entsize != bed->s->sizeof_sym)
2158 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
2160 if (hdr->sh_size != 0)
2163 /* Some linkers erroneously set sh_info to one with a
2164 zero sh_size. ld sees this as a global symbol count
2165 of (unsigned) -1. Fix it here. */
2170 /* PR 18854: A binary might contain more than one dynamic symbol table.
2171 Unusual, but possible. Warn, but continue. */
2172 if (elf_dynsymtab (abfd) != 0)
2175 /* xgettext:c-format */
2176 (_("%B: warning: multiple dynamic symbol tables detected"
2177 " - ignoring the table in section %u"),
2181 elf_dynsymtab (abfd) = shindex;
2182 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
2183 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
2184 abfd->flags |= HAS_SYMS;
2186 /* Besides being a symbol table, we also treat this as a regular
2187 section, so that objcopy can handle it. */
2188 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2191 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections. */
2193 elf_section_list * entry;
2195 for (entry = elf_symtab_shndx_list (abfd); entry != NULL; entry = entry->next)
2196 if (entry->ndx == shindex)
2199 entry = bfd_alloc (abfd, sizeof * entry);
2202 entry->ndx = shindex;
2204 entry->next = elf_symtab_shndx_list (abfd);
2205 elf_symtab_shndx_list (abfd) = entry;
2206 elf_elfsections (abfd)[shindex] = & entry->hdr;
2210 case SHT_STRTAB: /* A string table. */
2211 if (hdr->bfd_section != NULL)
2214 if (ehdr->e_shstrndx == shindex)
2216 elf_tdata (abfd)->shstrtab_hdr = *hdr;
2217 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
2221 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
2224 elf_tdata (abfd)->strtab_hdr = *hdr;
2225 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
2229 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
2232 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
2233 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
2234 elf_elfsections (abfd)[shindex] = hdr;
2235 /* We also treat this as a regular section, so that objcopy
2237 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2242 /* If the string table isn't one of the above, then treat it as a
2243 regular section. We need to scan all the headers to be sure,
2244 just in case this strtab section appeared before the above. */
2245 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
2247 unsigned int i, num_sec;
2249 num_sec = elf_numsections (abfd);
2250 for (i = 1; i < num_sec; i++)
2252 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2253 if (hdr2->sh_link == shindex)
2255 /* Prevent endless recursion on broken objects. */
2258 if (! bfd_section_from_shdr (abfd, i))
2260 if (elf_onesymtab (abfd) == i)
2262 if (elf_dynsymtab (abfd) == i)
2263 goto dynsymtab_strtab;
2267 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2272 /* *These* do a lot of work -- but build no sections! */
2274 asection *target_sect;
2275 Elf_Internal_Shdr *hdr2, **p_hdr;
2276 unsigned int num_sec = elf_numsections (abfd);
2277 struct bfd_elf_section_data *esdt;
2280 != (bfd_size_type) (hdr->sh_type == SHT_REL
2281 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
2284 /* Check for a bogus link to avoid crashing. */
2285 if (hdr->sh_link >= num_sec)
2288 /* xgettext:c-format */
2289 (_("%B: invalid link %lu for reloc section %s (index %u)"),
2290 abfd, hdr->sh_link, name, shindex);
2291 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2296 /* For some incomprehensible reason Oracle distributes
2297 libraries for Solaris in which some of the objects have
2298 bogus sh_link fields. It would be nice if we could just
2299 reject them, but, unfortunately, some people need to use
2300 them. We scan through the section headers; if we find only
2301 one suitable symbol table, we clobber the sh_link to point
2302 to it. I hope this doesn't break anything.
2304 Don't do it on executable nor shared library. */
2305 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0
2306 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
2307 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
2313 for (scan = 1; scan < num_sec; scan++)
2315 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
2316 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
2327 hdr->sh_link = found;
2330 /* Get the symbol table. */
2331 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
2332 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
2333 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
2336 /* If this reloc section does not use the main symbol table we
2337 don't treat it as a reloc section. BFD can't adequately
2338 represent such a section, so at least for now, we don't
2339 try. We just present it as a normal section. We also
2340 can't use it as a reloc section if it points to the null
2341 section, an invalid section, another reloc section, or its
2342 sh_link points to the null section. */
2343 if (hdr->sh_link != elf_onesymtab (abfd)
2344 || hdr->sh_link == SHN_UNDEF
2345 || hdr->sh_info == SHN_UNDEF
2346 || hdr->sh_info >= num_sec
2347 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
2348 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
2350 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2355 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
2358 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
2359 if (target_sect == NULL)
2362 esdt = elf_section_data (target_sect);
2363 if (hdr->sh_type == SHT_RELA)
2364 p_hdr = &esdt->rela.hdr;
2366 p_hdr = &esdt->rel.hdr;
2368 /* PR 17512: file: 0b4f81b7. */
2371 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2));
2376 elf_elfsections (abfd)[shindex] = hdr2;
2377 target_sect->reloc_count += (NUM_SHDR_ENTRIES (hdr)
2378 * bed->s->int_rels_per_ext_rel);
2379 target_sect->flags |= SEC_RELOC;
2380 target_sect->relocation = NULL;
2381 target_sect->rel_filepos = hdr->sh_offset;
2382 /* In the section to which the relocations apply, mark whether
2383 its relocations are of the REL or RELA variety. */
2384 if (hdr->sh_size != 0)
2386 if (hdr->sh_type == SHT_RELA)
2387 target_sect->use_rela_p = 1;
2389 abfd->flags |= HAS_RELOC;
2393 case SHT_GNU_verdef:
2394 elf_dynverdef (abfd) = shindex;
2395 elf_tdata (abfd)->dynverdef_hdr = *hdr;
2396 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2399 case SHT_GNU_versym:
2400 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
2403 elf_dynversym (abfd) = shindex;
2404 elf_tdata (abfd)->dynversym_hdr = *hdr;
2405 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2408 case SHT_GNU_verneed:
2409 elf_dynverref (abfd) = shindex;
2410 elf_tdata (abfd)->dynverref_hdr = *hdr;
2411 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2418 if (! IS_VALID_GROUP_SECTION_HEADER (hdr, GRP_ENTRY_SIZE))
2421 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2424 if (hdr->contents != NULL)
2426 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
2427 unsigned int n_elt = hdr->sh_size / sizeof (* idx);
2432 if (idx->flags & GRP_COMDAT)
2433 hdr->bfd_section->flags
2434 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
2436 /* We try to keep the same section order as it comes in. */
2439 while (--n_elt != 0)
2443 if (idx->shdr != NULL
2444 && (s = idx->shdr->bfd_section) != NULL
2445 && elf_next_in_group (s) != NULL)
2447 elf_next_in_group (hdr->bfd_section) = s;
2455 /* Possibly an attributes section. */
2456 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
2457 || hdr->sh_type == bed->obj_attrs_section_type)
2459 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2461 _bfd_elf_parse_attributes (abfd, hdr);
2465 /* Check for any processor-specific section types. */
2466 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
2469 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
2471 if ((hdr->sh_flags & SHF_ALLOC) != 0)
2472 /* FIXME: How to properly handle allocated section reserved
2473 for applications? */
2475 /* xgettext:c-format */
2476 (_("%B: don't know how to handle allocated, application "
2477 "specific section `%s' [0x%8x]"),
2478 abfd, name, hdr->sh_type);
2481 /* Allow sections reserved for applications. */
2482 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2487 else if (hdr->sh_type >= SHT_LOPROC
2488 && hdr->sh_type <= SHT_HIPROC)
2489 /* FIXME: We should handle this section. */
2491 /* xgettext:c-format */
2492 (_("%B: don't know how to handle processor specific section "
2494 abfd, name, hdr->sh_type);
2495 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
2497 /* Unrecognised OS-specific sections. */
2498 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
2499 /* SHF_OS_NONCONFORMING indicates that special knowledge is
2500 required to correctly process the section and the file should
2501 be rejected with an error message. */
2503 /* xgettext:c-format */
2504 (_("%B: don't know how to handle OS specific section "
2506 abfd, name, hdr->sh_type);
2509 /* Otherwise it should be processed. */
2510 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2515 /* FIXME: We should handle this section. */
2517 /* xgettext:c-format */
2518 (_("%B: don't know how to handle section `%s' [0x%8x]"),
2519 abfd, name, hdr->sh_type);
2527 if (sections_being_created && sections_being_created_abfd == abfd)
2528 sections_being_created [shindex] = FALSE;
2529 if (-- nesting == 0)
2531 sections_being_created = NULL;
2532 sections_being_created_abfd = abfd;
2537 /* Return the local symbol specified by ABFD, R_SYMNDX. */
2540 bfd_sym_from_r_symndx (struct sym_cache *cache,
2542 unsigned long r_symndx)
2544 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2546 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
2548 Elf_Internal_Shdr *symtab_hdr;
2549 unsigned char esym[sizeof (Elf64_External_Sym)];
2550 Elf_External_Sym_Shndx eshndx;
2552 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2553 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2554 &cache->sym[ent], esym, &eshndx) == NULL)
2557 if (cache->abfd != abfd)
2559 memset (cache->indx, -1, sizeof (cache->indx));
2562 cache->indx[ent] = r_symndx;
2565 return &cache->sym[ent];
2568 /* Given an ELF section number, retrieve the corresponding BFD
2572 bfd_section_from_elf_index (bfd *abfd, unsigned int sec_index)
2574 if (sec_index >= elf_numsections (abfd))
2576 return elf_elfsections (abfd)[sec_index]->bfd_section;
2579 static const struct bfd_elf_special_section special_sections_b[] =
2581 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2582 { NULL, 0, 0, 0, 0 }
2585 static const struct bfd_elf_special_section special_sections_c[] =
2587 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
2588 { NULL, 0, 0, 0, 0 }
2591 static const struct bfd_elf_special_section special_sections_d[] =
2593 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2594 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2595 /* There are more DWARF sections than these, but they needn't be added here
2596 unless you have to cope with broken compilers that don't emit section
2597 attributes or you want to help the user writing assembler. */
2598 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
2599 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
2600 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
2601 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
2602 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
2603 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
2604 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
2605 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
2606 { NULL, 0, 0, 0, 0 }
2609 static const struct bfd_elf_special_section special_sections_f[] =
2611 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2612 { STRING_COMMA_LEN (".fini_array"), -2, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2613 { NULL, 0 , 0, 0, 0 }
2616 static const struct bfd_elf_special_section special_sections_g[] =
2618 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2619 { STRING_COMMA_LEN (".gnu.lto_"), -1, SHT_PROGBITS, SHF_EXCLUDE },
2620 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2621 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2622 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2623 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2624 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2625 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2626 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2627 { NULL, 0, 0, 0, 0 }
2630 static const struct bfd_elf_special_section special_sections_h[] =
2632 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2633 { NULL, 0, 0, 0, 0 }
2636 static const struct bfd_elf_special_section special_sections_i[] =
2638 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2639 { STRING_COMMA_LEN (".init_array"), -2, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2640 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2641 { NULL, 0, 0, 0, 0 }
2644 static const struct bfd_elf_special_section special_sections_l[] =
2646 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2647 { NULL, 0, 0, 0, 0 }
2650 static const struct bfd_elf_special_section special_sections_n[] =
2652 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2653 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2654 { NULL, 0, 0, 0, 0 }
2657 static const struct bfd_elf_special_section special_sections_p[] =
2659 { STRING_COMMA_LEN (".preinit_array"), -2, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2660 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2661 { NULL, 0, 0, 0, 0 }
2664 static const struct bfd_elf_special_section special_sections_r[] =
2666 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2667 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2668 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2669 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2670 { NULL, 0, 0, 0, 0 }
2673 static const struct bfd_elf_special_section special_sections_s[] =
2675 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2676 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2677 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2678 /* See struct bfd_elf_special_section declaration for the semantics of
2679 this special case where .prefix_length != strlen (.prefix). */
2680 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2681 { NULL, 0, 0, 0, 0 }
2684 static const struct bfd_elf_special_section special_sections_t[] =
2686 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2687 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2688 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2689 { NULL, 0, 0, 0, 0 }
2692 static const struct bfd_elf_special_section special_sections_z[] =
2694 { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 },
2695 { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 },
2696 { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 },
2697 { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 },
2698 { NULL, 0, 0, 0, 0 }
2701 static const struct bfd_elf_special_section * const special_sections[] =
2703 special_sections_b, /* 'b' */
2704 special_sections_c, /* 'c' */
2705 special_sections_d, /* 'd' */
2707 special_sections_f, /* 'f' */
2708 special_sections_g, /* 'g' */
2709 special_sections_h, /* 'h' */
2710 special_sections_i, /* 'i' */
2713 special_sections_l, /* 'l' */
2715 special_sections_n, /* 'n' */
2717 special_sections_p, /* 'p' */
2719 special_sections_r, /* 'r' */
2720 special_sections_s, /* 's' */
2721 special_sections_t, /* 't' */
2727 special_sections_z /* 'z' */
2730 const struct bfd_elf_special_section *
2731 _bfd_elf_get_special_section (const char *name,
2732 const struct bfd_elf_special_section *spec,
2738 len = strlen (name);
2740 for (i = 0; spec[i].prefix != NULL; i++)
2743 int prefix_len = spec[i].prefix_length;
2745 if (len < prefix_len)
2747 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2750 suffix_len = spec[i].suffix_length;
2751 if (suffix_len <= 0)
2753 if (name[prefix_len] != 0)
2755 if (suffix_len == 0)
2757 if (name[prefix_len] != '.'
2758 && (suffix_len == -2
2759 || (rela && spec[i].type == SHT_REL)))
2765 if (len < prefix_len + suffix_len)
2767 if (memcmp (name + len - suffix_len,
2768 spec[i].prefix + prefix_len,
2778 const struct bfd_elf_special_section *
2779 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2782 const struct bfd_elf_special_section *spec;
2783 const struct elf_backend_data *bed;
2785 /* See if this is one of the special sections. */
2786 if (sec->name == NULL)
2789 bed = get_elf_backend_data (abfd);
2790 spec = bed->special_sections;
2793 spec = _bfd_elf_get_special_section (sec->name,
2794 bed->special_sections,
2800 if (sec->name[0] != '.')
2803 i = sec->name[1] - 'b';
2804 if (i < 0 || i > 'z' - 'b')
2807 spec = special_sections[i];
2812 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2816 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2818 struct bfd_elf_section_data *sdata;
2819 const struct elf_backend_data *bed;
2820 const struct bfd_elf_special_section *ssect;
2822 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2825 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd,
2829 sec->used_by_bfd = sdata;
2832 /* Indicate whether or not this section should use RELA relocations. */
2833 bed = get_elf_backend_data (abfd);
2834 sec->use_rela_p = bed->default_use_rela_p;
2836 /* When we read a file, we don't need to set ELF section type and
2837 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2838 anyway. We will set ELF section type and flags for all linker
2839 created sections. If user specifies BFD section flags, we will
2840 set ELF section type and flags based on BFD section flags in
2841 elf_fake_sections. Special handling for .init_array/.fini_array
2842 output sections since they may contain .ctors/.dtors input
2843 sections. We don't want _bfd_elf_init_private_section_data to
2844 copy ELF section type from .ctors/.dtors input sections. */
2845 if (abfd->direction != read_direction
2846 || (sec->flags & SEC_LINKER_CREATED) != 0)
2848 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2851 || (sec->flags & SEC_LINKER_CREATED) != 0
2852 || ssect->type == SHT_INIT_ARRAY
2853 || ssect->type == SHT_FINI_ARRAY))
2855 elf_section_type (sec) = ssect->type;
2856 elf_section_flags (sec) = ssect->attr;
2860 return _bfd_generic_new_section_hook (abfd, sec);
2863 /* Create a new bfd section from an ELF program header.
2865 Since program segments have no names, we generate a synthetic name
2866 of the form segment<NUM>, where NUM is generally the index in the
2867 program header table. For segments that are split (see below) we
2868 generate the names segment<NUM>a and segment<NUM>b.
2870 Note that some program segments may have a file size that is different than
2871 (less than) the memory size. All this means is that at execution the
2872 system must allocate the amount of memory specified by the memory size,
2873 but only initialize it with the first "file size" bytes read from the
2874 file. This would occur for example, with program segments consisting
2875 of combined data+bss.
2877 To handle the above situation, this routine generates TWO bfd sections
2878 for the single program segment. The first has the length specified by
2879 the file size of the segment, and the second has the length specified
2880 by the difference between the two sizes. In effect, the segment is split
2881 into its initialized and uninitialized parts.
2886 _bfd_elf_make_section_from_phdr (bfd *abfd,
2887 Elf_Internal_Phdr *hdr,
2889 const char *type_name)
2897 split = ((hdr->p_memsz > 0)
2898 && (hdr->p_filesz > 0)
2899 && (hdr->p_memsz > hdr->p_filesz));
2901 if (hdr->p_filesz > 0)
2903 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "a" : "");
2904 len = strlen (namebuf) + 1;
2905 name = (char *) bfd_alloc (abfd, len);
2908 memcpy (name, namebuf, len);
2909 newsect = bfd_make_section (abfd, name);
2910 if (newsect == NULL)
2912 newsect->vma = hdr->p_vaddr;
2913 newsect->lma = hdr->p_paddr;
2914 newsect->size = hdr->p_filesz;
2915 newsect->filepos = hdr->p_offset;
2916 newsect->flags |= SEC_HAS_CONTENTS;
2917 newsect->alignment_power = bfd_log2 (hdr->p_align);
2918 if (hdr->p_type == PT_LOAD)
2920 newsect->flags |= SEC_ALLOC;
2921 newsect->flags |= SEC_LOAD;
2922 if (hdr->p_flags & PF_X)
2924 /* FIXME: all we known is that it has execute PERMISSION,
2926 newsect->flags |= SEC_CODE;
2929 if (!(hdr->p_flags & PF_W))
2931 newsect->flags |= SEC_READONLY;
2935 if (hdr->p_memsz > hdr->p_filesz)
2939 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "b" : "");
2940 len = strlen (namebuf) + 1;
2941 name = (char *) bfd_alloc (abfd, len);
2944 memcpy (name, namebuf, len);
2945 newsect = bfd_make_section (abfd, name);
2946 if (newsect == NULL)
2948 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2949 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2950 newsect->size = hdr->p_memsz - hdr->p_filesz;
2951 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2952 align = newsect->vma & -newsect->vma;
2953 if (align == 0 || align > hdr->p_align)
2954 align = hdr->p_align;
2955 newsect->alignment_power = bfd_log2 (align);
2956 if (hdr->p_type == PT_LOAD)
2958 /* Hack for gdb. Segments that have not been modified do
2959 not have their contents written to a core file, on the
2960 assumption that a debugger can find the contents in the
2961 executable. We flag this case by setting the fake
2962 section size to zero. Note that "real" bss sections will
2963 always have their contents dumped to the core file. */
2964 if (bfd_get_format (abfd) == bfd_core)
2966 newsect->flags |= SEC_ALLOC;
2967 if (hdr->p_flags & PF_X)
2968 newsect->flags |= SEC_CODE;
2970 if (!(hdr->p_flags & PF_W))
2971 newsect->flags |= SEC_READONLY;
2978 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int hdr_index)
2980 const struct elf_backend_data *bed;
2982 switch (hdr->p_type)
2985 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "null");
2988 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "load");
2991 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "dynamic");
2994 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "interp");
2997 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "note"))
2999 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
3004 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "shlib");
3007 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "phdr");
3009 case PT_GNU_EH_FRAME:
3010 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index,
3014 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "stack");
3017 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "relro");
3020 /* Check for any processor-specific program segment types. */
3021 bed = get_elf_backend_data (abfd);
3022 return bed->elf_backend_section_from_phdr (abfd, hdr, hdr_index, "proc");
3026 /* Return the REL_HDR for SEC, assuming there is only a single one, either
3030 _bfd_elf_single_rel_hdr (asection *sec)
3032 if (elf_section_data (sec)->rel.hdr)
3034 BFD_ASSERT (elf_section_data (sec)->rela.hdr == NULL);
3035 return elf_section_data (sec)->rel.hdr;
3038 return elf_section_data (sec)->rela.hdr;
3042 _bfd_elf_set_reloc_sh_name (bfd *abfd,
3043 Elf_Internal_Shdr *rel_hdr,
3044 const char *sec_name,
3045 bfd_boolean use_rela_p)
3047 char *name = (char *) bfd_alloc (abfd,
3048 sizeof ".rela" + strlen (sec_name));
3052 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", sec_name);
3054 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
3056 if (rel_hdr->sh_name == (unsigned int) -1)
3062 /* Allocate and initialize a section-header for a new reloc section,
3063 containing relocations against ASECT. It is stored in RELDATA. If
3064 USE_RELA_P is TRUE, we use RELA relocations; otherwise, we use REL
3068 _bfd_elf_init_reloc_shdr (bfd *abfd,
3069 struct bfd_elf_section_reloc_data *reldata,
3070 const char *sec_name,
3071 bfd_boolean use_rela_p,
3072 bfd_boolean delay_st_name_p)
3074 Elf_Internal_Shdr *rel_hdr;
3075 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3077 BFD_ASSERT (reldata->hdr == NULL);
3078 rel_hdr = bfd_zalloc (abfd, sizeof (*rel_hdr));
3079 reldata->hdr = rel_hdr;
3081 if (delay_st_name_p)
3082 rel_hdr->sh_name = (unsigned int) -1;
3083 else if (!_bfd_elf_set_reloc_sh_name (abfd, rel_hdr, sec_name,
3086 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
3087 rel_hdr->sh_entsize = (use_rela_p
3088 ? bed->s->sizeof_rela
3089 : bed->s->sizeof_rel);
3090 rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
3091 rel_hdr->sh_flags = 0;
3092 rel_hdr->sh_addr = 0;
3093 rel_hdr->sh_size = 0;
3094 rel_hdr->sh_offset = 0;
3099 /* Return the default section type based on the passed in section flags. */
3102 bfd_elf_get_default_section_type (flagword flags)
3104 if ((flags & SEC_ALLOC) != 0
3105 && (flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
3107 return SHT_PROGBITS;
3110 struct fake_section_arg
3112 struct bfd_link_info *link_info;
3116 /* Set up an ELF internal section header for a section. */
3119 elf_fake_sections (bfd *abfd, asection *asect, void *fsarg)
3121 struct fake_section_arg *arg = (struct fake_section_arg *)fsarg;
3122 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3123 struct bfd_elf_section_data *esd = elf_section_data (asect);
3124 Elf_Internal_Shdr *this_hdr;
3125 unsigned int sh_type;
3126 const char *name = asect->name;
3127 bfd_boolean delay_st_name_p = FALSE;
3131 /* We already failed; just get out of the bfd_map_over_sections
3136 this_hdr = &esd->this_hdr;
3140 /* ld: compress DWARF debug sections with names: .debug_*. */
3141 if ((arg->link_info->compress_debug & COMPRESS_DEBUG)
3142 && (asect->flags & SEC_DEBUGGING)
3146 /* Set SEC_ELF_COMPRESS to indicate this section should be
3148 asect->flags |= SEC_ELF_COMPRESS;
3150 /* If this section will be compressed, delay adding section
3151 name to section name section after it is compressed in
3152 _bfd_elf_assign_file_positions_for_non_load. */
3153 delay_st_name_p = TRUE;
3156 else if ((asect->flags & SEC_ELF_RENAME))
3158 /* objcopy: rename output DWARF debug section. */
3159 if ((abfd->flags & (BFD_DECOMPRESS | BFD_COMPRESS_GABI)))
3161 /* When we decompress or compress with SHF_COMPRESSED,
3162 convert section name from .zdebug_* to .debug_* if
3166 char *new_name = convert_zdebug_to_debug (abfd, name);
3167 if (new_name == NULL)
3175 else if (asect->compress_status == COMPRESS_SECTION_DONE)
3177 /* PR binutils/18087: Compression does not always make a
3178 section smaller. So only rename the section when
3179 compression has actually taken place. If input section
3180 name is .zdebug_*, we should never compress it again. */
3181 char *new_name = convert_debug_to_zdebug (abfd, name);
3182 if (new_name == NULL)
3187 BFD_ASSERT (name[1] != 'z');
3192 if (delay_st_name_p)
3193 this_hdr->sh_name = (unsigned int) -1;
3197 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3199 if (this_hdr->sh_name == (unsigned int) -1)
3206 /* Don't clear sh_flags. Assembler may set additional bits. */
3208 if ((asect->flags & SEC_ALLOC) != 0
3209 || asect->user_set_vma)
3210 this_hdr->sh_addr = asect->vma;
3212 this_hdr->sh_addr = 0;
3214 this_hdr->sh_offset = 0;
3215 this_hdr->sh_size = asect->size;
3216 this_hdr->sh_link = 0;
3217 /* PR 17512: file: 0eb809fe, 8b0535ee. */
3218 if (asect->alignment_power >= (sizeof (bfd_vma) * 8) - 1)
3221 /* xgettext:c-format */
3222 (_("%B: error: Alignment power %d of section `%A' is too big"),
3223 abfd, asect->alignment_power, asect);
3227 this_hdr->sh_addralign = (bfd_vma) 1 << asect->alignment_power;
3228 /* The sh_entsize and sh_info fields may have been set already by
3229 copy_private_section_data. */
3231 this_hdr->bfd_section = asect;
3232 this_hdr->contents = NULL;
3234 /* If the section type is unspecified, we set it based on
3236 if ((asect->flags & SEC_GROUP) != 0)
3237 sh_type = SHT_GROUP;
3239 sh_type = bfd_elf_get_default_section_type (asect->flags);
3241 if (this_hdr->sh_type == SHT_NULL)
3242 this_hdr->sh_type = sh_type;
3243 else if (this_hdr->sh_type == SHT_NOBITS
3244 && sh_type == SHT_PROGBITS
3245 && (asect->flags & SEC_ALLOC) != 0)
3247 /* Warn if we are changing a NOBITS section to PROGBITS, but
3248 allow the link to proceed. This can happen when users link
3249 non-bss input sections to bss output sections, or emit data
3250 to a bss output section via a linker script. */
3252 (_("warning: section `%A' type changed to PROGBITS"), asect);
3253 this_hdr->sh_type = sh_type;
3256 switch (this_hdr->sh_type)
3267 case SHT_INIT_ARRAY:
3268 case SHT_FINI_ARRAY:
3269 case SHT_PREINIT_ARRAY:
3270 this_hdr->sh_entsize = bed->s->arch_size / 8;
3274 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
3278 this_hdr->sh_entsize = bed->s->sizeof_sym;
3282 this_hdr->sh_entsize = bed->s->sizeof_dyn;
3286 if (get_elf_backend_data (abfd)->may_use_rela_p)
3287 this_hdr->sh_entsize = bed->s->sizeof_rela;
3291 if (get_elf_backend_data (abfd)->may_use_rel_p)
3292 this_hdr->sh_entsize = bed->s->sizeof_rel;
3295 case SHT_GNU_versym:
3296 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
3299 case SHT_GNU_verdef:
3300 this_hdr->sh_entsize = 0;
3301 /* objcopy or strip will copy over sh_info, but may not set
3302 cverdefs. The linker will set cverdefs, but sh_info will be
3304 if (this_hdr->sh_info == 0)
3305 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
3307 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
3308 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
3311 case SHT_GNU_verneed:
3312 this_hdr->sh_entsize = 0;
3313 /* objcopy or strip will copy over sh_info, but may not set
3314 cverrefs. The linker will set cverrefs, but sh_info will be
3316 if (this_hdr->sh_info == 0)
3317 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
3319 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
3320 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
3324 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
3328 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
3332 if ((asect->flags & SEC_ALLOC) != 0)
3333 this_hdr->sh_flags |= SHF_ALLOC;
3334 if ((asect->flags & SEC_READONLY) == 0)
3335 this_hdr->sh_flags |= SHF_WRITE;
3336 if ((asect->flags & SEC_CODE) != 0)
3337 this_hdr->sh_flags |= SHF_EXECINSTR;
3338 if ((asect->flags & SEC_MERGE) != 0)
3340 this_hdr->sh_flags |= SHF_MERGE;
3341 this_hdr->sh_entsize = asect->entsize;
3343 if ((asect->flags & SEC_STRINGS) != 0)
3344 this_hdr->sh_flags |= SHF_STRINGS;
3345 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
3346 this_hdr->sh_flags |= SHF_GROUP;
3347 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
3349 this_hdr->sh_flags |= SHF_TLS;
3350 if (asect->size == 0
3351 && (asect->flags & SEC_HAS_CONTENTS) == 0)
3353 struct bfd_link_order *o = asect->map_tail.link_order;
3355 this_hdr->sh_size = 0;
3358 this_hdr->sh_size = o->offset + o->size;
3359 if (this_hdr->sh_size != 0)
3360 this_hdr->sh_type = SHT_NOBITS;
3364 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
3365 this_hdr->sh_flags |= SHF_EXCLUDE;
3367 /* If the section has relocs, set up a section header for the
3368 SHT_REL[A] section. If two relocation sections are required for
3369 this section, it is up to the processor-specific back-end to
3370 create the other. */
3371 if ((asect->flags & SEC_RELOC) != 0)
3373 /* When doing a relocatable link, create both REL and RELA sections if
3376 /* Do the normal setup if we wouldn't create any sections here. */
3377 && esd->rel.count + esd->rela.count > 0
3378 && (bfd_link_relocatable (arg->link_info)
3379 || arg->link_info->emitrelocations))
3381 if (esd->rel.count && esd->rel.hdr == NULL
3382 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rel, name, FALSE,
3388 if (esd->rela.count && esd->rela.hdr == NULL
3389 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rela, name, TRUE,
3396 else if (!_bfd_elf_init_reloc_shdr (abfd,
3398 ? &esd->rela : &esd->rel),
3405 /* Check for processor-specific section types. */
3406 sh_type = this_hdr->sh_type;
3407 if (bed->elf_backend_fake_sections
3408 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
3411 if (sh_type == SHT_NOBITS && asect->size != 0)
3413 /* Don't change the header type from NOBITS if we are being
3414 called for objcopy --only-keep-debug. */
3415 this_hdr->sh_type = sh_type;
3419 /* Fill in the contents of a SHT_GROUP section. Called from
3420 _bfd_elf_compute_section_file_positions for gas, objcopy, and
3421 when ELF targets use the generic linker, ld. Called for ld -r
3422 from bfd_elf_final_link. */
3425 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
3427 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
3428 asection *elt, *first;
3432 /* Ignore linker created group section. See elfNN_ia64_object_p in
3434 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
3438 if (elf_section_data (sec)->this_hdr.sh_info == 0)
3440 unsigned long symindx = 0;
3442 /* elf_group_id will have been set up by objcopy and the
3444 if (elf_group_id (sec) != NULL)
3445 symindx = elf_group_id (sec)->udata.i;
3449 /* If called from the assembler, swap_out_syms will have set up
3450 elf_section_syms. */
3451 BFD_ASSERT (elf_section_syms (abfd) != NULL);
3452 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
3454 elf_section_data (sec)->this_hdr.sh_info = symindx;
3456 else if (elf_section_data (sec)->this_hdr.sh_info == (unsigned int) -2)
3458 /* The ELF backend linker sets sh_info to -2 when the group
3459 signature symbol is global, and thus the index can't be
3460 set until all local symbols are output. */
3462 struct bfd_elf_section_data *sec_data;
3463 unsigned long symndx;
3464 unsigned long extsymoff;
3465 struct elf_link_hash_entry *h;
3467 /* The point of this little dance to the first SHF_GROUP section
3468 then back to the SHT_GROUP section is that this gets us to
3469 the SHT_GROUP in the input object. */
3470 igroup = elf_sec_group (elf_next_in_group (sec));
3471 sec_data = elf_section_data (igroup);
3472 symndx = sec_data->this_hdr.sh_info;
3474 if (!elf_bad_symtab (igroup->owner))
3476 Elf_Internal_Shdr *symtab_hdr;
3478 symtab_hdr = &elf_tdata (igroup->owner)->symtab_hdr;
3479 extsymoff = symtab_hdr->sh_info;
3481 h = elf_sym_hashes (igroup->owner)[symndx - extsymoff];
3482 while (h->root.type == bfd_link_hash_indirect
3483 || h->root.type == bfd_link_hash_warning)
3484 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3486 elf_section_data (sec)->this_hdr.sh_info = h->indx;
3489 /* The contents won't be allocated for "ld -r" or objcopy. */
3491 if (sec->contents == NULL)
3494 sec->contents = (unsigned char *) bfd_alloc (abfd, sec->size);
3496 /* Arrange for the section to be written out. */
3497 elf_section_data (sec)->this_hdr.contents = sec->contents;
3498 if (sec->contents == NULL)
3505 loc = sec->contents + sec->size;
3507 /* Get the pointer to the first section in the group that gas
3508 squirreled away here. objcopy arranges for this to be set to the
3509 start of the input section group. */
3510 first = elt = elf_next_in_group (sec);
3512 /* First element is a flag word. Rest of section is elf section
3513 indices for all the sections of the group. Write them backwards
3514 just to keep the group in the same order as given in .section
3515 directives, not that it matters. */
3522 s = s->output_section;
3524 && !bfd_is_abs_section (s))
3526 unsigned int idx = elf_section_data (s)->this_idx;
3529 H_PUT_32 (abfd, idx, loc);
3531 elt = elf_next_in_group (elt);
3537 BFD_ASSERT (loc == sec->contents);
3539 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
3542 /* Given NAME, the name of a relocation section stripped of its
3543 .rel/.rela prefix, return the section in ABFD to which the
3544 relocations apply. */
3547 _bfd_elf_plt_get_reloc_section (bfd *abfd, const char *name)
3549 /* If a target needs .got.plt section, relocations in rela.plt/rel.plt
3550 section likely apply to .got.plt or .got section. */
3551 if (get_elf_backend_data (abfd)->want_got_plt
3552 && strcmp (name, ".plt") == 0)
3557 sec = bfd_get_section_by_name (abfd, name);
3563 return bfd_get_section_by_name (abfd, name);
3566 /* Return the section to which RELOC_SEC applies. */
3569 elf_get_reloc_section (asection *reloc_sec)
3574 const struct elf_backend_data *bed;
3576 type = elf_section_data (reloc_sec)->this_hdr.sh_type;
3577 if (type != SHT_REL && type != SHT_RELA)
3580 /* We look up the section the relocs apply to by name. */
3581 name = reloc_sec->name;
3582 if (strncmp (name, ".rel", 4) != 0)
3585 if (type == SHT_RELA && *name++ != 'a')
3588 abfd = reloc_sec->owner;
3589 bed = get_elf_backend_data (abfd);
3590 return bed->get_reloc_section (abfd, name);
3593 /* Assign all ELF section numbers. The dummy first section is handled here
3594 too. The link/info pointers for the standard section types are filled
3595 in here too, while we're at it. */
3598 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
3600 struct elf_obj_tdata *t = elf_tdata (abfd);
3602 unsigned int section_number;
3603 Elf_Internal_Shdr **i_shdrp;
3604 struct bfd_elf_section_data *d;
3605 bfd_boolean need_symtab;
3609 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
3611 /* SHT_GROUP sections are in relocatable files only. */
3612 if (link_info == NULL || !link_info->resolve_section_groups)
3614 size_t reloc_count = 0;
3616 /* Put SHT_GROUP sections first. */
3617 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3619 d = elf_section_data (sec);
3621 if (d->this_hdr.sh_type == SHT_GROUP)
3623 if (sec->flags & SEC_LINKER_CREATED)
3625 /* Remove the linker created SHT_GROUP sections. */
3626 bfd_section_list_remove (abfd, sec);
3627 abfd->section_count--;
3630 d->this_idx = section_number++;
3633 /* Count relocations. */
3634 reloc_count += sec->reloc_count;
3637 /* Clear HAS_RELOC if there are no relocations. */
3638 if (reloc_count == 0)
3639 abfd->flags &= ~HAS_RELOC;
3642 for (sec = abfd->sections; sec; sec = sec->next)
3644 d = elf_section_data (sec);
3646 if (d->this_hdr.sh_type != SHT_GROUP)
3647 d->this_idx = section_number++;
3648 if (d->this_hdr.sh_name != (unsigned int) -1)
3649 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
3652 d->rel.idx = section_number++;
3653 if (d->rel.hdr->sh_name != (unsigned int) -1)
3654 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel.hdr->sh_name);
3661 d->rela.idx = section_number++;
3662 if (d->rela.hdr->sh_name != (unsigned int) -1)
3663 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rela.hdr->sh_name);
3669 need_symtab = (bfd_get_symcount (abfd) > 0
3670 || (link_info == NULL
3671 && ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3675 elf_onesymtab (abfd) = section_number++;
3676 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
3677 if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
3679 elf_section_list * entry;
3681 BFD_ASSERT (elf_symtab_shndx_list (abfd) == NULL);
3683 entry = bfd_zalloc (abfd, sizeof * entry);
3684 entry->ndx = section_number++;
3685 elf_symtab_shndx_list (abfd) = entry;
3687 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3688 ".symtab_shndx", FALSE);
3689 if (entry->hdr.sh_name == (unsigned int) -1)
3692 elf_strtab_sec (abfd) = section_number++;
3693 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
3696 elf_shstrtab_sec (abfd) = section_number++;
3697 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
3698 elf_elfheader (abfd)->e_shstrndx = elf_shstrtab_sec (abfd);
3700 if (section_number >= SHN_LORESERVE)
3702 /* xgettext:c-format */
3703 _bfd_error_handler (_("%B: too many sections: %u"),
3704 abfd, section_number);
3708 elf_numsections (abfd) = section_number;
3709 elf_elfheader (abfd)->e_shnum = section_number;
3711 /* Set up the list of section header pointers, in agreement with the
3713 i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc2 (abfd, section_number,
3714 sizeof (Elf_Internal_Shdr *));
3715 if (i_shdrp == NULL)
3718 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd,
3719 sizeof (Elf_Internal_Shdr));
3720 if (i_shdrp[0] == NULL)
3722 bfd_release (abfd, i_shdrp);
3726 elf_elfsections (abfd) = i_shdrp;
3728 i_shdrp[elf_shstrtab_sec (abfd)] = &t->shstrtab_hdr;
3731 i_shdrp[elf_onesymtab (abfd)] = &t->symtab_hdr;
3732 if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF))
3734 elf_section_list * entry = elf_symtab_shndx_list (abfd);
3735 BFD_ASSERT (entry != NULL);
3736 i_shdrp[entry->ndx] = & entry->hdr;
3737 entry->hdr.sh_link = elf_onesymtab (abfd);
3739 i_shdrp[elf_strtab_sec (abfd)] = &t->strtab_hdr;
3740 t->symtab_hdr.sh_link = elf_strtab_sec (abfd);
3743 for (sec = abfd->sections; sec; sec = sec->next)
3747 d = elf_section_data (sec);
3749 i_shdrp[d->this_idx] = &d->this_hdr;
3750 if (d->rel.idx != 0)
3751 i_shdrp[d->rel.idx] = d->rel.hdr;
3752 if (d->rela.idx != 0)
3753 i_shdrp[d->rela.idx] = d->rela.hdr;
3755 /* Fill in the sh_link and sh_info fields while we're at it. */
3757 /* sh_link of a reloc section is the section index of the symbol
3758 table. sh_info is the section index of the section to which
3759 the relocation entries apply. */
3760 if (d->rel.idx != 0)
3762 d->rel.hdr->sh_link = elf_onesymtab (abfd);
3763 d->rel.hdr->sh_info = d->this_idx;
3764 d->rel.hdr->sh_flags |= SHF_INFO_LINK;
3766 if (d->rela.idx != 0)
3768 d->rela.hdr->sh_link = elf_onesymtab (abfd);
3769 d->rela.hdr->sh_info = d->this_idx;
3770 d->rela.hdr->sh_flags |= SHF_INFO_LINK;
3773 /* We need to set up sh_link for SHF_LINK_ORDER. */
3774 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3776 s = elf_linked_to_section (sec);
3779 /* elf_linked_to_section points to the input section. */
3780 if (link_info != NULL)
3782 /* Check discarded linkonce section. */
3783 if (discarded_section (s))
3787 /* xgettext:c-format */
3788 (_("%B: sh_link of section `%A' points to"
3789 " discarded section `%A' of `%B'"),
3790 abfd, d->this_hdr.bfd_section,
3792 /* Point to the kept section if it has the same
3793 size as the discarded one. */
3794 kept = _bfd_elf_check_kept_section (s, link_info);
3797 bfd_set_error (bfd_error_bad_value);
3803 s = s->output_section;
3804 BFD_ASSERT (s != NULL);
3808 /* Handle objcopy. */
3809 if (s->output_section == NULL)
3812 /* xgettext:c-format */
3813 (_("%B: sh_link of section `%A' points to"
3814 " removed section `%A' of `%B'"),
3815 abfd, d->this_hdr.bfd_section, s, s->owner);
3816 bfd_set_error (bfd_error_bad_value);
3819 s = s->output_section;
3821 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3826 The Intel C compiler generates SHT_IA_64_UNWIND with
3827 SHF_LINK_ORDER. But it doesn't set the sh_link or
3828 sh_info fields. Hence we could get the situation
3830 const struct elf_backend_data *bed
3831 = get_elf_backend_data (abfd);
3832 if (bed->link_order_error_handler)
3833 bed->link_order_error_handler
3834 /* xgettext:c-format */
3835 (_("%B: warning: sh_link not set for section `%A'"),
3840 switch (d->this_hdr.sh_type)
3844 /* A reloc section which we are treating as a normal BFD
3845 section. sh_link is the section index of the symbol
3846 table. sh_info is the section index of the section to
3847 which the relocation entries apply. We assume that an
3848 allocated reloc section uses the dynamic symbol table.
3849 FIXME: How can we be sure? */
3850 s = bfd_get_section_by_name (abfd, ".dynsym");
3852 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3854 s = elf_get_reloc_section (sec);
3857 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3858 d->this_hdr.sh_flags |= SHF_INFO_LINK;
3863 /* We assume that a section named .stab*str is a stabs
3864 string section. We look for a section with the same name
3865 but without the trailing ``str'', and set its sh_link
3866 field to point to this section. */
3867 if (CONST_STRNEQ (sec->name, ".stab")
3868 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3873 len = strlen (sec->name);
3874 alc = (char *) bfd_malloc (len - 2);
3877 memcpy (alc, sec->name, len - 3);
3878 alc[len - 3] = '\0';
3879 s = bfd_get_section_by_name (abfd, alc);
3883 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3885 /* This is a .stab section. */
3886 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3887 elf_section_data (s)->this_hdr.sh_entsize
3888 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3895 case SHT_GNU_verneed:
3896 case SHT_GNU_verdef:
3897 /* sh_link is the section header index of the string table
3898 used for the dynamic entries, or the symbol table, or the
3900 s = bfd_get_section_by_name (abfd, ".dynstr");
3902 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3905 case SHT_GNU_LIBLIST:
3906 /* sh_link is the section header index of the prelink library
3907 list used for the dynamic entries, or the symbol table, or
3908 the version strings. */
3909 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3910 ? ".dynstr" : ".gnu.libstr");
3912 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3917 case SHT_GNU_versym:
3918 /* sh_link is the section header index of the symbol table
3919 this hash table or version table is for. */
3920 s = bfd_get_section_by_name (abfd, ".dynsym");
3922 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3926 d->this_hdr.sh_link = elf_onesymtab (abfd);
3930 /* Delay setting sh_name to _bfd_elf_write_object_contents so that
3931 _bfd_elf_assign_file_positions_for_non_load can convert DWARF
3932 debug section name from .debug_* to .zdebug_* if needed. */
3938 sym_is_global (bfd *abfd, asymbol *sym)
3940 /* If the backend has a special mapping, use it. */
3941 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3942 if (bed->elf_backend_sym_is_global)
3943 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3945 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_GNU_UNIQUE)) != 0
3946 || bfd_is_und_section (bfd_get_section (sym))
3947 || bfd_is_com_section (bfd_get_section (sym)));
3950 /* Filter global symbols of ABFD to include in the import library. All
3951 SYMCOUNT symbols of ABFD can be examined from their pointers in
3952 SYMS. Pointers of symbols to keep should be stored contiguously at
3953 the beginning of that array.
3955 Returns the number of symbols to keep. */
3958 _bfd_elf_filter_global_symbols (bfd *abfd, struct bfd_link_info *info,
3959 asymbol **syms, long symcount)
3961 long src_count, dst_count = 0;
3963 for (src_count = 0; src_count < symcount; src_count++)
3965 asymbol *sym = syms[src_count];
3966 char *name = (char *) bfd_asymbol_name (sym);
3967 struct bfd_link_hash_entry *h;
3969 if (!sym_is_global (abfd, sym))
3972 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, FALSE);
3975 if (h->type != bfd_link_hash_defined && h->type != bfd_link_hash_defweak)
3977 if (h->linker_def || h->ldscript_def)
3980 syms[dst_count++] = sym;
3983 syms[dst_count] = NULL;
3988 /* Don't output section symbols for sections that are not going to be
3989 output, that are duplicates or there is no BFD section. */
3992 ignore_section_sym (bfd *abfd, asymbol *sym)
3994 elf_symbol_type *type_ptr;
3996 if ((sym->flags & BSF_SECTION_SYM) == 0)
3999 type_ptr = elf_symbol_from (abfd, sym);
4000 return ((type_ptr != NULL
4001 && type_ptr->internal_elf_sym.st_shndx != 0
4002 && bfd_is_abs_section (sym->section))
4003 || !(sym->section->owner == abfd
4004 || (sym->section->output_section->owner == abfd
4005 && sym->section->output_offset == 0)
4006 || bfd_is_abs_section (sym->section)));
4009 /* Map symbol from it's internal number to the external number, moving
4010 all local symbols to be at the head of the list. */
4013 elf_map_symbols (bfd *abfd, unsigned int *pnum_locals)
4015 unsigned int symcount = bfd_get_symcount (abfd);
4016 asymbol **syms = bfd_get_outsymbols (abfd);
4017 asymbol **sect_syms;
4018 unsigned int num_locals = 0;
4019 unsigned int num_globals = 0;
4020 unsigned int num_locals2 = 0;
4021 unsigned int num_globals2 = 0;
4022 unsigned int max_index = 0;
4028 fprintf (stderr, "elf_map_symbols\n");
4032 for (asect = abfd->sections; asect; asect = asect->next)
4034 if (max_index < asect->index)
4035 max_index = asect->index;
4039 sect_syms = (asymbol **) bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
4040 if (sect_syms == NULL)
4042 elf_section_syms (abfd) = sect_syms;
4043 elf_num_section_syms (abfd) = max_index;
4045 /* Init sect_syms entries for any section symbols we have already
4046 decided to output. */
4047 for (idx = 0; idx < symcount; idx++)
4049 asymbol *sym = syms[idx];
4051 if ((sym->flags & BSF_SECTION_SYM) != 0
4053 && !ignore_section_sym (abfd, sym)
4054 && !bfd_is_abs_section (sym->section))
4056 asection *sec = sym->section;
4058 if (sec->owner != abfd)
4059 sec = sec->output_section;
4061 sect_syms[sec->index] = syms[idx];
4065 /* Classify all of the symbols. */
4066 for (idx = 0; idx < symcount; idx++)
4068 if (sym_is_global (abfd, syms[idx]))
4070 else if (!ignore_section_sym (abfd, syms[idx]))
4074 /* We will be adding a section symbol for each normal BFD section. Most
4075 sections will already have a section symbol in outsymbols, but
4076 eg. SHT_GROUP sections will not, and we need the section symbol mapped
4077 at least in that case. */
4078 for (asect = abfd->sections; asect; asect = asect->next)
4080 if (sect_syms[asect->index] == NULL)
4082 if (!sym_is_global (abfd, asect->symbol))
4089 /* Now sort the symbols so the local symbols are first. */
4090 new_syms = (asymbol **) bfd_alloc2 (abfd, num_locals + num_globals,
4091 sizeof (asymbol *));
4093 if (new_syms == NULL)
4096 for (idx = 0; idx < symcount; idx++)
4098 asymbol *sym = syms[idx];
4101 if (sym_is_global (abfd, sym))
4102 i = num_locals + num_globals2++;
4103 else if (!ignore_section_sym (abfd, sym))
4108 sym->udata.i = i + 1;
4110 for (asect = abfd->sections; asect; asect = asect->next)
4112 if (sect_syms[asect->index] == NULL)
4114 asymbol *sym = asect->symbol;
4117 sect_syms[asect->index] = sym;
4118 if (!sym_is_global (abfd, sym))
4121 i = num_locals + num_globals2++;
4123 sym->udata.i = i + 1;
4127 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
4129 *pnum_locals = num_locals;
4133 /* Align to the maximum file alignment that could be required for any
4134 ELF data structure. */
4136 static inline file_ptr
4137 align_file_position (file_ptr off, int align)
4139 return (off + align - 1) & ~(align - 1);
4142 /* Assign a file position to a section, optionally aligning to the
4143 required section alignment. */
4146 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
4150 if (align && i_shdrp->sh_addralign > 1)
4151 offset = BFD_ALIGN (offset, i_shdrp->sh_addralign);
4152 i_shdrp->sh_offset = offset;
4153 if (i_shdrp->bfd_section != NULL)
4154 i_shdrp->bfd_section->filepos = offset;
4155 if (i_shdrp->sh_type != SHT_NOBITS)
4156 offset += i_shdrp->sh_size;
4160 /* Compute the file positions we are going to put the sections at, and
4161 otherwise prepare to begin writing out the ELF file. If LINK_INFO
4162 is not NULL, this is being called by the ELF backend linker. */
4165 _bfd_elf_compute_section_file_positions (bfd *abfd,
4166 struct bfd_link_info *link_info)
4168 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4169 struct fake_section_arg fsargs;
4171 struct elf_strtab_hash *strtab = NULL;
4172 Elf_Internal_Shdr *shstrtab_hdr;
4173 bfd_boolean need_symtab;
4175 if (abfd->output_has_begun)
4178 /* Do any elf backend specific processing first. */
4179 if (bed->elf_backend_begin_write_processing)
4180 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
4182 if (! prep_headers (abfd))
4185 /* Post process the headers if necessary. */
4186 (*bed->elf_backend_post_process_headers) (abfd, link_info);
4188 fsargs.failed = FALSE;
4189 fsargs.link_info = link_info;
4190 bfd_map_over_sections (abfd, elf_fake_sections, &fsargs);
4194 if (!assign_section_numbers (abfd, link_info))
4197 /* The backend linker builds symbol table information itself. */
4198 need_symtab = (link_info == NULL
4199 && (bfd_get_symcount (abfd) > 0
4200 || ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
4204 /* Non-zero if doing a relocatable link. */
4205 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
4207 if (! swap_out_syms (abfd, &strtab, relocatable_p))
4212 if (link_info == NULL)
4214 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
4219 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
4220 /* sh_name was set in prep_headers. */
4221 shstrtab_hdr->sh_type = SHT_STRTAB;
4222 shstrtab_hdr->sh_flags = bed->elf_strtab_flags;
4223 shstrtab_hdr->sh_addr = 0;
4224 /* sh_size is set in _bfd_elf_assign_file_positions_for_non_load. */
4225 shstrtab_hdr->sh_entsize = 0;
4226 shstrtab_hdr->sh_link = 0;
4227 shstrtab_hdr->sh_info = 0;
4228 /* sh_offset is set in _bfd_elf_assign_file_positions_for_non_load. */
4229 shstrtab_hdr->sh_addralign = 1;
4231 if (!assign_file_positions_except_relocs (abfd, link_info))
4237 Elf_Internal_Shdr *hdr;
4239 off = elf_next_file_pos (abfd);
4241 hdr = & elf_symtab_hdr (abfd);
4242 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4244 if (elf_symtab_shndx_list (abfd) != NULL)
4246 hdr = & elf_symtab_shndx_list (abfd)->hdr;
4247 if (hdr->sh_size != 0)
4248 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4249 /* FIXME: What about other symtab_shndx sections in the list ? */
4252 hdr = &elf_tdata (abfd)->strtab_hdr;
4253 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4255 elf_next_file_pos (abfd) = off;
4257 /* Now that we know where the .strtab section goes, write it
4259 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
4260 || ! _bfd_elf_strtab_emit (abfd, strtab))
4262 _bfd_elf_strtab_free (strtab);
4265 abfd->output_has_begun = TRUE;
4270 /* Make an initial estimate of the size of the program header. If we
4271 get the number wrong here, we'll redo section placement. */
4273 static bfd_size_type
4274 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
4278 const struct elf_backend_data *bed;
4280 /* Assume we will need exactly two PT_LOAD segments: one for text
4281 and one for data. */
4284 s = bfd_get_section_by_name (abfd, ".interp");
4285 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4287 /* If we have a loadable interpreter section, we need a
4288 PT_INTERP segment. In this case, assume we also need a
4289 PT_PHDR segment, although that may not be true for all
4294 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4296 /* We need a PT_DYNAMIC segment. */
4300 if (info != NULL && info->relro)
4302 /* We need a PT_GNU_RELRO segment. */
4306 if (elf_eh_frame_hdr (abfd))
4308 /* We need a PT_GNU_EH_FRAME segment. */
4312 if (elf_stack_flags (abfd))
4314 /* We need a PT_GNU_STACK segment. */
4318 for (s = abfd->sections; s != NULL; s = s->next)
4320 if ((s->flags & SEC_LOAD) != 0
4321 && CONST_STRNEQ (s->name, ".note"))
4323 /* We need a PT_NOTE segment. */
4325 /* Try to create just one PT_NOTE segment
4326 for all adjacent loadable .note* sections.
4327 gABI requires that within a PT_NOTE segment
4328 (and also inside of each SHT_NOTE section)
4329 each note is padded to a multiple of 4 size,
4330 so we check whether the sections are correctly
4332 if (s->alignment_power == 2)
4333 while (s->next != NULL
4334 && s->next->alignment_power == 2
4335 && (s->next->flags & SEC_LOAD) != 0
4336 && CONST_STRNEQ (s->next->name, ".note"))
4341 for (s = abfd->sections; s != NULL; s = s->next)
4343 if (s->flags & SEC_THREAD_LOCAL)
4345 /* We need a PT_TLS segment. */
4351 bed = get_elf_backend_data (abfd);
4353 if ((abfd->flags & D_PAGED) != 0)
4355 /* Add a PT_GNU_MBIND segment for each mbind section. */
4356 unsigned int page_align_power = bfd_log2 (bed->commonpagesize);
4357 for (s = abfd->sections; s != NULL; s = s->next)
4358 if (elf_section_flags (s) & SHF_GNU_MBIND)
4360 if (elf_section_data (s)->this_hdr.sh_info
4364 /* xgettext:c-format */
4365 (_("%B: GNU_MBIN section `%A' has invalid sh_info field: %d"),
4366 abfd, s, elf_section_data (s)->this_hdr.sh_info);
4369 /* Align mbind section to page size. */
4370 if (s->alignment_power < page_align_power)
4371 s->alignment_power = page_align_power;
4376 /* Let the backend count up any program headers it might need. */
4377 if (bed->elf_backend_additional_program_headers)
4381 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
4387 return segs * bed->s->sizeof_phdr;
4390 /* Find the segment that contains the output_section of section. */
4393 _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section)
4395 struct elf_segment_map *m;
4396 Elf_Internal_Phdr *p;
4398 for (m = elf_seg_map (abfd), p = elf_tdata (abfd)->phdr;
4404 for (i = m->count - 1; i >= 0; i--)
4405 if (m->sections[i] == section)
4412 /* Create a mapping from a set of sections to a program segment. */
4414 static struct elf_segment_map *
4415 make_mapping (bfd *abfd,
4416 asection **sections,
4421 struct elf_segment_map *m;
4426 amt = sizeof (struct elf_segment_map);
4427 amt += (to - from - 1) * sizeof (asection *);
4428 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4432 m->p_type = PT_LOAD;
4433 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
4434 m->sections[i - from] = *hdrpp;
4435 m->count = to - from;
4437 if (from == 0 && phdr)
4439 /* Include the headers in the first PT_LOAD segment. */
4440 m->includes_filehdr = 1;
4441 m->includes_phdrs = 1;
4447 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
4450 struct elf_segment_map *
4451 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
4453 struct elf_segment_map *m;
4455 m = (struct elf_segment_map *) bfd_zalloc (abfd,
4456 sizeof (struct elf_segment_map));
4460 m->p_type = PT_DYNAMIC;
4462 m->sections[0] = dynsec;
4467 /* Possibly add or remove segments from the segment map. */
4470 elf_modify_segment_map (bfd *abfd,
4471 struct bfd_link_info *info,
4472 bfd_boolean remove_empty_load)
4474 struct elf_segment_map **m;
4475 const struct elf_backend_data *bed;
4477 /* The placement algorithm assumes that non allocated sections are
4478 not in PT_LOAD segments. We ensure this here by removing such
4479 sections from the segment map. We also remove excluded
4480 sections. Finally, any PT_LOAD segment without sections is
4482 m = &elf_seg_map (abfd);
4485 unsigned int i, new_count;
4487 for (new_count = 0, i = 0; i < (*m)->count; i++)
4489 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
4490 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
4491 || (*m)->p_type != PT_LOAD))
4493 (*m)->sections[new_count] = (*m)->sections[i];
4497 (*m)->count = new_count;
4499 if (remove_empty_load
4500 && (*m)->p_type == PT_LOAD
4502 && !(*m)->includes_phdrs)
4508 bed = get_elf_backend_data (abfd);
4509 if (bed->elf_backend_modify_segment_map != NULL)
4511 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
4518 /* Set up a mapping from BFD sections to program segments. */
4521 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
4524 struct elf_segment_map *m;
4525 asection **sections = NULL;
4526 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4527 bfd_boolean no_user_phdrs;
4529 no_user_phdrs = elf_seg_map (abfd) == NULL;
4532 info->user_phdrs = !no_user_phdrs;
4534 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
4538 struct elf_segment_map *mfirst;
4539 struct elf_segment_map **pm;
4542 unsigned int phdr_index;
4543 bfd_vma maxpagesize;
4545 bfd_boolean phdr_in_segment = TRUE;
4546 bfd_boolean writable;
4548 asection *first_tls = NULL;
4549 asection *first_mbind = NULL;
4550 asection *dynsec, *eh_frame_hdr;
4552 bfd_vma addr_mask, wrap_to = 0;
4553 bfd_boolean linker_created_pt_phdr_segment = FALSE;
4555 /* Select the allocated sections, and sort them. */
4557 sections = (asection **) bfd_malloc2 (bfd_count_sections (abfd),
4558 sizeof (asection *));
4559 if (sections == NULL)
4562 /* Calculate top address, avoiding undefined behaviour of shift
4563 left operator when shift count is equal to size of type
4565 addr_mask = ((bfd_vma) 1 << (bfd_arch_bits_per_address (abfd) - 1)) - 1;
4566 addr_mask = (addr_mask << 1) + 1;
4569 for (s = abfd->sections; s != NULL; s = s->next)
4571 if ((s->flags & SEC_ALLOC) != 0)
4575 /* A wrapping section potentially clashes with header. */
4576 if (((s->lma + s->size) & addr_mask) < (s->lma & addr_mask))
4577 wrap_to = (s->lma + s->size) & addr_mask;
4580 BFD_ASSERT (i <= bfd_count_sections (abfd));
4583 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
4585 /* Build the mapping. */
4590 /* If we have a .interp section, then create a PT_PHDR segment for
4591 the program headers and a PT_INTERP segment for the .interp
4593 s = bfd_get_section_by_name (abfd, ".interp");
4594 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4596 amt = sizeof (struct elf_segment_map);
4597 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4601 m->p_type = PT_PHDR;
4602 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
4603 m->p_flags = PF_R | PF_X;
4604 m->p_flags_valid = 1;
4605 m->includes_phdrs = 1;
4606 linker_created_pt_phdr_segment = TRUE;
4610 amt = sizeof (struct elf_segment_map);
4611 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4615 m->p_type = PT_INTERP;
4623 /* Look through the sections. We put sections in the same program
4624 segment when the start of the second section can be placed within
4625 a few bytes of the end of the first section. */
4629 maxpagesize = bed->maxpagesize;
4630 /* PR 17512: file: c8455299.
4631 Avoid divide-by-zero errors later on.
4632 FIXME: Should we abort if the maxpagesize is zero ? */
4633 if (maxpagesize == 0)
4636 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
4638 && (dynsec->flags & SEC_LOAD) == 0)
4641 /* Deal with -Ttext or something similar such that the first section
4642 is not adjacent to the program headers. This is an
4643 approximation, since at this point we don't know exactly how many
4644 program headers we will need. */
4647 bfd_size_type phdr_size = elf_program_header_size (abfd);
4649 if (phdr_size == (bfd_size_type) -1)
4650 phdr_size = get_program_header_size (abfd, info);
4651 phdr_size += bed->s->sizeof_ehdr;
4652 if ((abfd->flags & D_PAGED) == 0
4653 || (sections[0]->lma & addr_mask) < phdr_size
4654 || ((sections[0]->lma & addr_mask) % maxpagesize
4655 < phdr_size % maxpagesize)
4656 || (sections[0]->lma & addr_mask & -maxpagesize) < wrap_to)
4658 /* PR 20815: The ELF standard says that a PT_PHDR segment, if
4659 present, must be included as part of the memory image of the
4660 program. Ie it must be part of a PT_LOAD segment as well.
4661 If we have had to create our own PT_PHDR segment, but it is
4662 not going to be covered by the first PT_LOAD segment, then
4663 force the inclusion if we can... */
4664 if ((abfd->flags & D_PAGED) != 0
4665 && linker_created_pt_phdr_segment)
4666 phdr_in_segment = TRUE;
4668 phdr_in_segment = FALSE;
4672 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
4675 bfd_boolean new_segment;
4679 /* See if this section and the last one will fit in the same
4682 if (last_hdr == NULL)
4684 /* If we don't have a segment yet, then we don't need a new
4685 one (we build the last one after this loop). */
4686 new_segment = FALSE;
4688 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
4690 /* If this section has a different relation between the
4691 virtual address and the load address, then we need a new
4695 else if (hdr->lma < last_hdr->lma + last_size
4696 || last_hdr->lma + last_size < last_hdr->lma)
4698 /* If this section has a load address that makes it overlap
4699 the previous section, then we need a new segment. */
4702 /* In the next test we have to be careful when last_hdr->lma is close
4703 to the end of the address space. If the aligned address wraps
4704 around to the start of the address space, then there are no more
4705 pages left in memory and it is OK to assume that the current
4706 section can be included in the current segment. */
4707 else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
4709 && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
4712 /* If putting this section in this segment would force us to
4713 skip a page in the segment, then we need a new segment. */
4716 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
4717 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0
4718 && ((abfd->flags & D_PAGED) == 0
4719 || (((last_hdr->lma + last_size - 1) & -maxpagesize)
4720 != (hdr->lma & -maxpagesize))))
4722 /* We don't want to put a loaded section after a
4723 nonloaded (ie. bss style) section in the same segment
4724 as that will force the non-loaded section to be loaded.
4725 Consider .tbss sections as loaded for this purpose.
4726 However, like the writable/non-writable case below,
4727 if they are on the same page then they must be put
4728 in the same segment. */
4731 else if ((abfd->flags & D_PAGED) == 0)
4733 /* If the file is not demand paged, which means that we
4734 don't require the sections to be correctly aligned in the
4735 file, then there is no other reason for a new segment. */
4736 new_segment = FALSE;
4739 && (hdr->flags & SEC_READONLY) == 0
4740 && (((last_hdr->lma + last_size - 1) & -maxpagesize)
4741 != (hdr->lma & -maxpagesize)))
4743 /* We don't want to put a writable section in a read only
4744 segment, unless they are on the same page in memory
4745 anyhow. We already know that the last section does not
4746 bring us past the current section on the page, so the
4747 only case in which the new section is not on the same
4748 page as the previous section is when the previous section
4749 ends precisely on a page boundary. */
4754 /* Otherwise, we can use the same segment. */
4755 new_segment = FALSE;
4758 /* Allow interested parties a chance to override our decision. */
4759 if (last_hdr != NULL
4761 && info->callbacks->override_segment_assignment != NULL)
4763 = info->callbacks->override_segment_assignment (info, abfd, hdr,
4769 if ((hdr->flags & SEC_READONLY) == 0)
4772 /* .tbss sections effectively have zero size. */
4773 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4774 != SEC_THREAD_LOCAL)
4775 last_size = hdr->size;
4781 /* We need a new program segment. We must create a new program
4782 header holding all the sections from phdr_index until hdr. */
4784 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4791 if ((hdr->flags & SEC_READONLY) == 0)
4797 /* .tbss sections effectively have zero size. */
4798 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
4799 last_size = hdr->size;
4803 phdr_in_segment = FALSE;
4806 /* Create a final PT_LOAD program segment, but not if it's just
4808 if (last_hdr != NULL
4809 && (i - phdr_index != 1
4810 || ((last_hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4811 != SEC_THREAD_LOCAL)))
4813 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4821 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
4824 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
4831 /* For each batch of consecutive loadable .note sections,
4832 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
4833 because if we link together nonloadable .note sections and
4834 loadable .note sections, we will generate two .note sections
4835 in the output file. FIXME: Using names for section types is
4837 for (s = abfd->sections; s != NULL; s = s->next)
4839 if ((s->flags & SEC_LOAD) != 0
4840 && CONST_STRNEQ (s->name, ".note"))
4845 amt = sizeof (struct elf_segment_map);
4846 if (s->alignment_power == 2)
4847 for (s2 = s; s2->next != NULL; s2 = s2->next)
4849 if (s2->next->alignment_power == 2
4850 && (s2->next->flags & SEC_LOAD) != 0
4851 && CONST_STRNEQ (s2->next->name, ".note")
4852 && align_power (s2->lma + s2->size, 2)
4858 amt += (count - 1) * sizeof (asection *);
4859 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4863 m->p_type = PT_NOTE;
4867 m->sections[m->count - count--] = s;
4868 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4871 m->sections[m->count - 1] = s;
4872 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4876 if (s->flags & SEC_THREAD_LOCAL)
4882 if (first_mbind == NULL
4883 && (elf_section_flags (s) & SHF_GNU_MBIND) != 0)
4887 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
4890 amt = sizeof (struct elf_segment_map);
4891 amt += (tls_count - 1) * sizeof (asection *);
4892 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4897 m->count = tls_count;
4898 /* Mandated PF_R. */
4900 m->p_flags_valid = 1;
4902 for (i = 0; i < (unsigned int) tls_count; ++i)
4904 if ((s->flags & SEC_THREAD_LOCAL) == 0)
4907 (_("%B: TLS sections are not adjacent:"), abfd);
4910 while (i < (unsigned int) tls_count)
4912 if ((s->flags & SEC_THREAD_LOCAL) != 0)
4914 _bfd_error_handler (_(" TLS: %A"), s);
4918 _bfd_error_handler (_(" non-TLS: %A"), s);
4921 bfd_set_error (bfd_error_bad_value);
4932 if (first_mbind && (abfd->flags & D_PAGED) != 0)
4933 for (s = first_mbind; s != NULL; s = s->next)
4934 if ((elf_section_flags (s) & SHF_GNU_MBIND) != 0
4935 && (elf_section_data (s)->this_hdr.sh_info
4936 <= PT_GNU_MBIND_NUM))
4938 /* Mandated PF_R. */
4939 unsigned long p_flags = PF_R;
4940 if ((s->flags & SEC_READONLY) == 0)
4942 if ((s->flags & SEC_CODE) != 0)
4945 amt = sizeof (struct elf_segment_map) + sizeof (asection *);
4946 m = bfd_zalloc (abfd, amt);
4950 m->p_type = (PT_GNU_MBIND_LO
4951 + elf_section_data (s)->this_hdr.sh_info);
4953 m->p_flags_valid = 1;
4955 m->p_flags = p_flags;
4961 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
4963 eh_frame_hdr = elf_eh_frame_hdr (abfd);
4964 if (eh_frame_hdr != NULL
4965 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
4967 amt = sizeof (struct elf_segment_map);
4968 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4972 m->p_type = PT_GNU_EH_FRAME;
4974 m->sections[0] = eh_frame_hdr->output_section;
4980 if (elf_stack_flags (abfd))
4982 amt = sizeof (struct elf_segment_map);
4983 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4987 m->p_type = PT_GNU_STACK;
4988 m->p_flags = elf_stack_flags (abfd);
4989 m->p_align = bed->stack_align;
4990 m->p_flags_valid = 1;
4991 m->p_align_valid = m->p_align != 0;
4992 if (info->stacksize > 0)
4994 m->p_size = info->stacksize;
4995 m->p_size_valid = 1;
5002 if (info != NULL && info->relro)
5004 for (m = mfirst; m != NULL; m = m->next)
5006 if (m->p_type == PT_LOAD
5008 && m->sections[0]->vma >= info->relro_start
5009 && m->sections[0]->vma < info->relro_end)
5012 while (--i != (unsigned) -1)
5013 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS))
5014 == (SEC_LOAD | SEC_HAS_CONTENTS))
5017 if (i != (unsigned) -1)
5022 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
5025 amt = sizeof (struct elf_segment_map);
5026 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
5030 m->p_type = PT_GNU_RELRO;
5037 elf_seg_map (abfd) = mfirst;
5040 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
5043 for (count = 0, m = elf_seg_map (abfd); m != NULL; m = m->next)
5045 elf_program_header_size (abfd) = count * bed->s->sizeof_phdr;
5050 if (sections != NULL)
5055 /* Sort sections by address. */
5058 elf_sort_sections (const void *arg1, const void *arg2)
5060 const asection *sec1 = *(const asection **) arg1;
5061 const asection *sec2 = *(const asection **) arg2;
5062 bfd_size_type size1, size2;
5064 /* Sort by LMA first, since this is the address used to
5065 place the section into a segment. */
5066 if (sec1->lma < sec2->lma)
5068 else if (sec1->lma > sec2->lma)
5071 /* Then sort by VMA. Normally the LMA and the VMA will be
5072 the same, and this will do nothing. */
5073 if (sec1->vma < sec2->vma)
5075 else if (sec1->vma > sec2->vma)
5078 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
5080 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
5086 /* If the indicies are the same, do not return 0
5087 here, but continue to try the next comparison. */
5088 if (sec1->target_index - sec2->target_index != 0)
5089 return sec1->target_index - sec2->target_index;
5094 else if (TOEND (sec2))
5099 /* Sort by size, to put zero sized sections
5100 before others at the same address. */
5102 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
5103 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
5110 return sec1->target_index - sec2->target_index;
5113 /* Ian Lance Taylor writes:
5115 We shouldn't be using % with a negative signed number. That's just
5116 not good. We have to make sure either that the number is not
5117 negative, or that the number has an unsigned type. When the types
5118 are all the same size they wind up as unsigned. When file_ptr is a
5119 larger signed type, the arithmetic winds up as signed long long,
5122 What we're trying to say here is something like ``increase OFF by
5123 the least amount that will cause it to be equal to the VMA modulo
5125 /* In other words, something like:
5127 vma_offset = m->sections[0]->vma % bed->maxpagesize;
5128 off_offset = off % bed->maxpagesize;
5129 if (vma_offset < off_offset)
5130 adjustment = vma_offset + bed->maxpagesize - off_offset;
5132 adjustment = vma_offset - off_offset;
5134 which can can be collapsed into the expression below. */
5137 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
5139 /* PR binutils/16199: Handle an alignment of zero. */
5140 if (maxpagesize == 0)
5142 return ((vma - off) % maxpagesize);
5146 print_segment_map (const struct elf_segment_map *m)
5149 const char *pt = get_segment_type (m->p_type);
5154 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
5155 sprintf (buf, "LOPROC+%7.7x",
5156 (unsigned int) (m->p_type - PT_LOPROC));
5157 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
5158 sprintf (buf, "LOOS+%7.7x",
5159 (unsigned int) (m->p_type - PT_LOOS));
5161 snprintf (buf, sizeof (buf), "%8.8x",
5162 (unsigned int) m->p_type);
5166 fprintf (stderr, "%s:", pt);
5167 for (j = 0; j < m->count; j++)
5168 fprintf (stderr, " %s", m->sections [j]->name);
5174 write_zeros (bfd *abfd, file_ptr pos, bfd_size_type len)
5179 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
5181 buf = bfd_zmalloc (len);
5184 ret = bfd_bwrite (buf, len, abfd) == len;
5189 /* Assign file positions to the sections based on the mapping from
5190 sections to segments. This function also sets up some fields in
5194 assign_file_positions_for_load_sections (bfd *abfd,
5195 struct bfd_link_info *link_info)
5197 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5198 struct elf_segment_map *m;
5199 Elf_Internal_Phdr *phdrs;
5200 Elf_Internal_Phdr *p;
5202 bfd_size_type maxpagesize;
5203 unsigned int pt_load_count = 0;
5206 bfd_vma header_pad = 0;
5208 if (link_info == NULL
5209 && !_bfd_elf_map_sections_to_segments (abfd, link_info))
5213 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
5217 header_pad = m->header_size;
5222 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
5223 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
5227 /* PR binutils/12467. */
5228 elf_elfheader (abfd)->e_phoff = 0;
5229 elf_elfheader (abfd)->e_phentsize = 0;
5232 elf_elfheader (abfd)->e_phnum = alloc;
5234 if (elf_program_header_size (abfd) == (bfd_size_type) -1)
5235 elf_program_header_size (abfd) = alloc * bed->s->sizeof_phdr;
5237 BFD_ASSERT (elf_program_header_size (abfd)
5238 >= alloc * bed->s->sizeof_phdr);
5242 elf_next_file_pos (abfd) = bed->s->sizeof_ehdr;
5246 /* We're writing the size in elf_program_header_size (abfd),
5247 see assign_file_positions_except_relocs, so make sure we have
5248 that amount allocated, with trailing space cleared.
5249 The variable alloc contains the computed need, while
5250 elf_program_header_size (abfd) contains the size used for the
5252 See ld/emultempl/elf-generic.em:gld${EMULATION_NAME}_map_segments
5253 where the layout is forced to according to a larger size in the
5254 last iterations for the testcase ld-elf/header. */
5255 BFD_ASSERT (elf_program_header_size (abfd) % bed->s->sizeof_phdr
5257 phdrs = (Elf_Internal_Phdr *)
5259 (elf_program_header_size (abfd) / bed->s->sizeof_phdr),
5260 sizeof (Elf_Internal_Phdr));
5261 elf_tdata (abfd)->phdr = phdrs;
5266 if ((abfd->flags & D_PAGED) != 0)
5267 maxpagesize = bed->maxpagesize;
5269 off = bed->s->sizeof_ehdr;
5270 off += alloc * bed->s->sizeof_phdr;
5271 if (header_pad < (bfd_vma) off)
5277 for (m = elf_seg_map (abfd), p = phdrs, j = 0;
5279 m = m->next, p++, j++)
5283 bfd_boolean no_contents;
5285 /* If elf_segment_map is not from map_sections_to_segments, the
5286 sections may not be correctly ordered. NOTE: sorting should
5287 not be done to the PT_NOTE section of a corefile, which may
5288 contain several pseudo-sections artificially created by bfd.
5289 Sorting these pseudo-sections breaks things badly. */
5291 && !(elf_elfheader (abfd)->e_type == ET_CORE
5292 && m->p_type == PT_NOTE))
5293 qsort (m->sections, (size_t) m->count, sizeof (asection *),
5296 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
5297 number of sections with contents contributing to both p_filesz
5298 and p_memsz, followed by a number of sections with no contents
5299 that just contribute to p_memsz. In this loop, OFF tracks next
5300 available file offset for PT_LOAD and PT_NOTE segments. */
5301 p->p_type = m->p_type;
5302 p->p_flags = m->p_flags;
5307 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
5309 if (m->p_paddr_valid)
5310 p->p_paddr = m->p_paddr;
5311 else if (m->count == 0)
5314 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
5316 if (p->p_type == PT_LOAD
5317 && (abfd->flags & D_PAGED) != 0)
5319 /* p_align in demand paged PT_LOAD segments effectively stores
5320 the maximum page size. When copying an executable with
5321 objcopy, we set m->p_align from the input file. Use this
5322 value for maxpagesize rather than bed->maxpagesize, which
5323 may be different. Note that we use maxpagesize for PT_TLS
5324 segment alignment later in this function, so we are relying
5325 on at least one PT_LOAD segment appearing before a PT_TLS
5327 if (m->p_align_valid)
5328 maxpagesize = m->p_align;
5330 p->p_align = maxpagesize;
5333 else if (m->p_align_valid)
5334 p->p_align = m->p_align;
5335 else if (m->count == 0)
5336 p->p_align = 1 << bed->s->log_file_align;
5340 no_contents = FALSE;
5342 if (p->p_type == PT_LOAD
5345 bfd_size_type align;
5346 unsigned int align_power = 0;
5348 if (m->p_align_valid)
5352 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
5354 unsigned int secalign;
5356 secalign = bfd_get_section_alignment (abfd, *secpp);
5357 if (secalign > align_power)
5358 align_power = secalign;
5360 align = (bfd_size_type) 1 << align_power;
5361 if (align < maxpagesize)
5362 align = maxpagesize;
5365 for (i = 0; i < m->count; i++)
5366 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
5367 /* If we aren't making room for this section, then
5368 it must be SHT_NOBITS regardless of what we've
5369 set via struct bfd_elf_special_section. */
5370 elf_section_type (m->sections[i]) = SHT_NOBITS;
5372 /* Find out whether this segment contains any loadable
5375 for (i = 0; i < m->count; i++)
5376 if (elf_section_type (m->sections[i]) != SHT_NOBITS)
5378 no_contents = FALSE;
5382 off_adjust = vma_page_aligned_bias (p->p_vaddr, off, align);
5384 /* Broken hardware and/or kernel require that files do not
5385 map the same page with different permissions on some hppa
5387 if (pt_load_count > 1
5388 && bed->no_page_alias
5389 && (off & (maxpagesize - 1)) != 0
5390 && (off & -maxpagesize) == ((off + off_adjust) & -maxpagesize))
5391 off_adjust += maxpagesize;
5395 /* We shouldn't need to align the segment on disk since
5396 the segment doesn't need file space, but the gABI
5397 arguably requires the alignment and glibc ld.so
5398 checks it. So to comply with the alignment
5399 requirement but not waste file space, we adjust
5400 p_offset for just this segment. (OFF_ADJUST is
5401 subtracted from OFF later.) This may put p_offset
5402 past the end of file, but that shouldn't matter. */
5407 /* Make sure the .dynamic section is the first section in the
5408 PT_DYNAMIC segment. */
5409 else if (p->p_type == PT_DYNAMIC
5411 && strcmp (m->sections[0]->name, ".dynamic") != 0)
5414 (_("%B: The first section in the PT_DYNAMIC segment"
5415 " is not the .dynamic section"),
5417 bfd_set_error (bfd_error_bad_value);
5420 /* Set the note section type to SHT_NOTE. */
5421 else if (p->p_type == PT_NOTE)
5422 for (i = 0; i < m->count; i++)
5423 elf_section_type (m->sections[i]) = SHT_NOTE;
5429 if (m->includes_filehdr)
5431 if (!m->p_flags_valid)
5433 p->p_filesz = bed->s->sizeof_ehdr;
5434 p->p_memsz = bed->s->sizeof_ehdr;
5437 if (p->p_vaddr < (bfd_vma) off
5438 || (!m->p_paddr_valid
5439 && p->p_paddr < (bfd_vma) off))
5442 (_("%B: Not enough room for program headers,"
5443 " try linking with -N"),
5445 bfd_set_error (bfd_error_bad_value);
5450 if (!m->p_paddr_valid)
5455 if (m->includes_phdrs)
5457 if (!m->p_flags_valid)
5460 if (!m->includes_filehdr)
5462 p->p_offset = bed->s->sizeof_ehdr;
5466 p->p_vaddr -= off - p->p_offset;
5467 if (!m->p_paddr_valid)
5468 p->p_paddr -= off - p->p_offset;
5472 p->p_filesz += alloc * bed->s->sizeof_phdr;
5473 p->p_memsz += alloc * bed->s->sizeof_phdr;
5476 p->p_filesz += header_pad;
5477 p->p_memsz += header_pad;
5481 if (p->p_type == PT_LOAD
5482 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
5484 if (!m->includes_filehdr && !m->includes_phdrs)
5490 adjust = off - (p->p_offset + p->p_filesz);
5492 p->p_filesz += adjust;
5493 p->p_memsz += adjust;
5497 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
5498 maps. Set filepos for sections in PT_LOAD segments, and in
5499 core files, for sections in PT_NOTE segments.
5500 assign_file_positions_for_non_load_sections will set filepos
5501 for other sections and update p_filesz for other segments. */
5502 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
5505 bfd_size_type align;
5506 Elf_Internal_Shdr *this_hdr;
5509 this_hdr = &elf_section_data (sec)->this_hdr;
5510 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
5512 if ((p->p_type == PT_LOAD
5513 || p->p_type == PT_TLS)
5514 && (this_hdr->sh_type != SHT_NOBITS
5515 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
5516 && ((this_hdr->sh_flags & SHF_TLS) == 0
5517 || p->p_type == PT_TLS))))
5519 bfd_vma p_start = p->p_paddr;
5520 bfd_vma p_end = p_start + p->p_memsz;
5521 bfd_vma s_start = sec->lma;
5522 bfd_vma adjust = s_start - p_end;
5526 || p_end < p_start))
5529 /* xgettext:c-format */
5530 (_("%B: section %A lma %#lx adjusted to %#lx"), abfd, sec,
5531 (unsigned long) s_start, (unsigned long) p_end);
5535 p->p_memsz += adjust;
5537 if (this_hdr->sh_type != SHT_NOBITS)
5539 if (p->p_filesz + adjust < p->p_memsz)
5541 /* We have a PROGBITS section following NOBITS ones.
5542 Allocate file space for the NOBITS section(s) and
5544 adjust = p->p_memsz - p->p_filesz;
5545 if (!write_zeros (abfd, off, adjust))
5549 p->p_filesz += adjust;
5553 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
5555 /* The section at i == 0 is the one that actually contains
5559 this_hdr->sh_offset = sec->filepos = off;
5560 off += this_hdr->sh_size;
5561 p->p_filesz = this_hdr->sh_size;
5567 /* The rest are fake sections that shouldn't be written. */
5576 if (p->p_type == PT_LOAD)
5578 this_hdr->sh_offset = sec->filepos = off;
5579 if (this_hdr->sh_type != SHT_NOBITS)
5580 off += this_hdr->sh_size;
5582 else if (this_hdr->sh_type == SHT_NOBITS
5583 && (this_hdr->sh_flags & SHF_TLS) != 0
5584 && this_hdr->sh_offset == 0)
5586 /* This is a .tbss section that didn't get a PT_LOAD.
5587 (See _bfd_elf_map_sections_to_segments "Create a
5588 final PT_LOAD".) Set sh_offset to the value it
5589 would have if we had created a zero p_filesz and
5590 p_memsz PT_LOAD header for the section. This
5591 also makes the PT_TLS header have the same
5593 bfd_vma adjust = vma_page_aligned_bias (this_hdr->sh_addr,
5595 this_hdr->sh_offset = sec->filepos = off + adjust;
5598 if (this_hdr->sh_type != SHT_NOBITS)
5600 p->p_filesz += this_hdr->sh_size;
5601 /* A load section without SHF_ALLOC is something like
5602 a note section in a PT_NOTE segment. These take
5603 file space but are not loaded into memory. */
5604 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
5605 p->p_memsz += this_hdr->sh_size;
5607 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
5609 if (p->p_type == PT_TLS)
5610 p->p_memsz += this_hdr->sh_size;
5612 /* .tbss is special. It doesn't contribute to p_memsz of
5614 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
5615 p->p_memsz += this_hdr->sh_size;
5618 if (align > p->p_align
5619 && !m->p_align_valid
5620 && (p->p_type != PT_LOAD
5621 || (abfd->flags & D_PAGED) == 0))
5625 if (!m->p_flags_valid)
5628 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
5630 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
5637 /* Check that all sections are in a PT_LOAD segment.
5638 Don't check funky gdb generated core files. */
5639 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
5641 bfd_boolean check_vma = TRUE;
5643 for (i = 1; i < m->count; i++)
5644 if (m->sections[i]->vma == m->sections[i - 1]->vma
5645 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i])
5646 ->this_hdr), p) != 0
5647 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i - 1])
5648 ->this_hdr), p) != 0)
5650 /* Looks like we have overlays packed into the segment. */
5655 for (i = 0; i < m->count; i++)
5657 Elf_Internal_Shdr *this_hdr;
5660 sec = m->sections[i];
5661 this_hdr = &(elf_section_data(sec)->this_hdr);
5662 if (!ELF_SECTION_IN_SEGMENT_1 (this_hdr, p, check_vma, 0)
5663 && !ELF_TBSS_SPECIAL (this_hdr, p))
5666 /* xgettext:c-format */
5667 (_("%B: section `%A' can't be allocated in segment %d"),
5669 print_segment_map (m);
5675 elf_next_file_pos (abfd) = off;
5679 /* Assign file positions for the other sections. */
5682 assign_file_positions_for_non_load_sections (bfd *abfd,
5683 struct bfd_link_info *link_info)
5685 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5686 Elf_Internal_Shdr **i_shdrpp;
5687 Elf_Internal_Shdr **hdrpp, **end_hdrpp;
5688 Elf_Internal_Phdr *phdrs;
5689 Elf_Internal_Phdr *p;
5690 struct elf_segment_map *m;
5691 struct elf_segment_map *hdrs_segment;
5692 bfd_vma filehdr_vaddr, filehdr_paddr;
5693 bfd_vma phdrs_vaddr, phdrs_paddr;
5697 i_shdrpp = elf_elfsections (abfd);
5698 end_hdrpp = i_shdrpp + elf_numsections (abfd);
5699 off = elf_next_file_pos (abfd);
5700 for (hdrpp = i_shdrpp + 1; hdrpp < end_hdrpp; hdrpp++)
5702 Elf_Internal_Shdr *hdr;
5705 if (hdr->bfd_section != NULL
5706 && (hdr->bfd_section->filepos != 0
5707 || (hdr->sh_type == SHT_NOBITS
5708 && hdr->contents == NULL)))
5709 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
5710 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
5712 if (hdr->sh_size != 0)
5714 /* xgettext:c-format */
5715 (_("%B: warning: allocated section `%s' not in segment"),
5717 (hdr->bfd_section == NULL
5719 : hdr->bfd_section->name));
5720 /* We don't need to page align empty sections. */
5721 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
5722 off += vma_page_aligned_bias (hdr->sh_addr, off,
5725 off += vma_page_aligned_bias (hdr->sh_addr, off,
5727 off = _bfd_elf_assign_file_position_for_section (hdr, off,
5730 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
5731 && hdr->bfd_section == NULL)
5732 || (hdr->bfd_section != NULL
5733 && (hdr->bfd_section->flags & SEC_ELF_COMPRESS))
5734 /* Compress DWARF debug sections. */
5735 || hdr == i_shdrpp[elf_onesymtab (abfd)]
5736 || (elf_symtab_shndx_list (abfd) != NULL
5737 && hdr == i_shdrpp[elf_symtab_shndx_list (abfd)->ndx])
5738 || hdr == i_shdrpp[elf_strtab_sec (abfd)]
5739 || hdr == i_shdrpp[elf_shstrtab_sec (abfd)])
5740 hdr->sh_offset = -1;
5742 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
5745 /* Now that we have set the section file positions, we can set up
5746 the file positions for the non PT_LOAD segments. */
5750 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
5752 hdrs_segment = NULL;
5753 phdrs = elf_tdata (abfd)->phdr;
5754 for (m = elf_seg_map (abfd), p = phdrs; m != NULL; m = m->next, p++)
5757 if (p->p_type != PT_LOAD)
5760 if (m->includes_filehdr)
5762 filehdr_vaddr = p->p_vaddr;
5763 filehdr_paddr = p->p_paddr;
5765 if (m->includes_phdrs)
5767 phdrs_vaddr = p->p_vaddr;
5768 phdrs_paddr = p->p_paddr;
5769 if (m->includes_filehdr)
5772 phdrs_vaddr += bed->s->sizeof_ehdr;
5773 phdrs_paddr += bed->s->sizeof_ehdr;
5778 if (hdrs_segment != NULL && link_info != NULL)
5780 /* There is a segment that contains both the file headers and the
5781 program headers, so provide a symbol __ehdr_start pointing there.
5782 A program can use this to examine itself robustly. */
5784 struct elf_link_hash_entry *hash
5785 = elf_link_hash_lookup (elf_hash_table (link_info), "__ehdr_start",
5786 FALSE, FALSE, TRUE);
5787 /* If the symbol was referenced and not defined, define it. */
5789 && (hash->root.type == bfd_link_hash_new
5790 || hash->root.type == bfd_link_hash_undefined
5791 || hash->root.type == bfd_link_hash_undefweak
5792 || hash->root.type == bfd_link_hash_common))
5795 if (hdrs_segment->count != 0)
5796 /* The segment contains sections, so use the first one. */
5797 s = hdrs_segment->sections[0];
5799 /* Use the first (i.e. lowest-addressed) section in any segment. */
5800 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
5809 hash->root.u.def.value = filehdr_vaddr - s->vma;
5810 hash->root.u.def.section = s;
5814 hash->root.u.def.value = filehdr_vaddr;
5815 hash->root.u.def.section = bfd_abs_section_ptr;
5818 hash->root.type = bfd_link_hash_defined;
5819 hash->def_regular = 1;
5824 for (m = elf_seg_map (abfd), p = phdrs; m != NULL; m = m->next, p++)
5826 if (p->p_type == PT_GNU_RELRO)
5828 const Elf_Internal_Phdr *lp;
5829 struct elf_segment_map *lm;
5831 if (link_info != NULL)
5833 /* During linking the range of the RELRO segment is passed
5835 for (lm = elf_seg_map (abfd), lp = phdrs;
5837 lm = lm->next, lp++)
5839 if (lp->p_type == PT_LOAD
5840 && lp->p_vaddr < link_info->relro_end
5842 && lm->sections[0]->vma >= link_info->relro_start)
5846 BFD_ASSERT (lm != NULL);
5850 /* Otherwise we are copying an executable or shared
5851 library, but we need to use the same linker logic. */
5852 for (lp = phdrs; lp < phdrs + count; ++lp)
5854 if (lp->p_type == PT_LOAD
5855 && lp->p_paddr == p->p_paddr)
5860 if (lp < phdrs + count)
5862 p->p_vaddr = lp->p_vaddr;
5863 p->p_paddr = lp->p_paddr;
5864 p->p_offset = lp->p_offset;
5865 if (link_info != NULL)
5866 p->p_filesz = link_info->relro_end - lp->p_vaddr;
5867 else if (m->p_size_valid)
5868 p->p_filesz = m->p_size;
5871 p->p_memsz = p->p_filesz;
5872 /* Preserve the alignment and flags if they are valid. The
5873 gold linker generates RW/4 for the PT_GNU_RELRO section.
5874 It is better for objcopy/strip to honor these attributes
5875 otherwise gdb will choke when using separate debug files.
5877 if (!m->p_align_valid)
5879 if (!m->p_flags_valid)
5884 memset (p, 0, sizeof *p);
5885 p->p_type = PT_NULL;
5888 else if (p->p_type == PT_GNU_STACK)
5890 if (m->p_size_valid)
5891 p->p_memsz = m->p_size;
5893 else if (m->count != 0)
5897 if (p->p_type != PT_LOAD
5898 && (p->p_type != PT_NOTE
5899 || bfd_get_format (abfd) != bfd_core))
5901 /* A user specified segment layout may include a PHDR
5902 segment that overlaps with a LOAD segment... */
5903 if (p->p_type == PT_PHDR)
5909 if (m->includes_filehdr || m->includes_phdrs)
5911 /* PR 17512: file: 2195325e. */
5913 (_("%B: error: non-load segment %d includes file header and/or program header"),
5914 abfd, (int)(p - phdrs));
5919 p->p_offset = m->sections[0]->filepos;
5920 for (i = m->count; i-- != 0;)
5922 asection *sect = m->sections[i];
5923 Elf_Internal_Shdr *hdr = &elf_section_data (sect)->this_hdr;
5924 if (hdr->sh_type != SHT_NOBITS)
5926 p->p_filesz = (sect->filepos - m->sections[0]->filepos
5933 else if (m->includes_filehdr)
5935 p->p_vaddr = filehdr_vaddr;
5936 if (! m->p_paddr_valid)
5937 p->p_paddr = filehdr_paddr;
5939 else if (m->includes_phdrs)
5941 p->p_vaddr = phdrs_vaddr;
5942 if (! m->p_paddr_valid)
5943 p->p_paddr = phdrs_paddr;
5947 elf_next_file_pos (abfd) = off;
5952 static elf_section_list *
5953 find_section_in_list (unsigned int i, elf_section_list * list)
5955 for (;list != NULL; list = list->next)
5961 /* Work out the file positions of all the sections. This is called by
5962 _bfd_elf_compute_section_file_positions. All the section sizes and
5963 VMAs must be known before this is called.
5965 Reloc sections come in two flavours: Those processed specially as
5966 "side-channel" data attached to a section to which they apply, and
5967 those that bfd doesn't process as relocations. The latter sort are
5968 stored in a normal bfd section by bfd_section_from_shdr. We don't
5969 consider the former sort here, unless they form part of the loadable
5970 image. Reloc sections not assigned here will be handled later by
5971 assign_file_positions_for_relocs.
5973 We also don't set the positions of the .symtab and .strtab here. */
5976 assign_file_positions_except_relocs (bfd *abfd,
5977 struct bfd_link_info *link_info)
5979 struct elf_obj_tdata *tdata = elf_tdata (abfd);
5980 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5981 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5983 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
5984 && bfd_get_format (abfd) != bfd_core)
5986 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
5987 unsigned int num_sec = elf_numsections (abfd);
5988 Elf_Internal_Shdr **hdrpp;
5992 /* Start after the ELF header. */
5993 off = i_ehdrp->e_ehsize;
5995 /* We are not creating an executable, which means that we are
5996 not creating a program header, and that the actual order of
5997 the sections in the file is unimportant. */
5998 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
6000 Elf_Internal_Shdr *hdr;
6003 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
6004 && hdr->bfd_section == NULL)
6005 || (hdr->bfd_section != NULL
6006 && (hdr->bfd_section->flags & SEC_ELF_COMPRESS))
6007 /* Compress DWARF debug sections. */
6008 || i == elf_onesymtab (abfd)
6009 || (elf_symtab_shndx_list (abfd) != NULL
6010 && hdr == i_shdrpp[elf_symtab_shndx_list (abfd)->ndx])
6011 || i == elf_strtab_sec (abfd)
6012 || i == elf_shstrtab_sec (abfd))
6014 hdr->sh_offset = -1;
6017 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
6020 elf_next_file_pos (abfd) = off;
6026 /* Assign file positions for the loaded sections based on the
6027 assignment of sections to segments. */
6028 if (!assign_file_positions_for_load_sections (abfd, link_info))
6031 /* And for non-load sections. */
6032 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
6035 if (bed->elf_backend_modify_program_headers != NULL)
6037 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
6041 /* Set e_type in ELF header to ET_EXEC for -pie -Ttext-segment=. */
6042 if (link_info != NULL && bfd_link_pie (link_info))
6044 unsigned int num_segments = elf_elfheader (abfd)->e_phnum;
6045 Elf_Internal_Phdr *segment = elf_tdata (abfd)->phdr;
6046 Elf_Internal_Phdr *end_segment = &segment[num_segments];
6048 /* Find the lowest p_vaddr in PT_LOAD segments. */
6049 bfd_vma p_vaddr = (bfd_vma) -1;
6050 for (; segment < end_segment; segment++)
6051 if (segment->p_type == PT_LOAD && p_vaddr > segment->p_vaddr)
6052 p_vaddr = segment->p_vaddr;
6054 /* Set e_type to ET_EXEC if the lowest p_vaddr in PT_LOAD
6055 segments is non-zero. */
6057 i_ehdrp->e_type = ET_EXEC;
6060 /* Write out the program headers. */
6061 alloc = elf_program_header_size (abfd) / bed->s->sizeof_phdr;
6063 /* Sort the program headers into the ordering required by the ELF standard. */
6067 /* PR ld/20815 - Check that the program header segment, if present, will
6068 be loaded into memory. FIXME: The check below is not sufficient as
6069 really all PT_LOAD segments should be checked before issuing an error
6070 message. Plus the PHDR segment does not have to be the first segment
6071 in the program header table. But this version of the check should
6072 catch all real world use cases.
6074 FIXME: We used to have code here to sort the PT_LOAD segments into
6075 ascending order, as per the ELF spec. But this breaks some programs,
6076 including the Linux kernel. But really either the spec should be
6077 changed or the programs updated. */
6079 && tdata->phdr[0].p_type == PT_PHDR
6080 && ! bed->elf_backend_allow_non_load_phdr (abfd, tdata->phdr, alloc)
6081 && tdata->phdr[1].p_type == PT_LOAD
6082 && (tdata->phdr[1].p_vaddr > tdata->phdr[0].p_vaddr
6083 || (tdata->phdr[1].p_vaddr + tdata->phdr[1].p_memsz)
6084 < (tdata->phdr[0].p_vaddr + tdata->phdr[0].p_memsz)))
6086 /* The fix for this error is usually to edit the linker script being
6087 used and set up the program headers manually. Either that or
6088 leave room for the headers at the start of the SECTIONS. */
6089 _bfd_error_handler (_("\
6090 %B: error: PHDR segment not covered by LOAD segment"),
6095 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
6096 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
6104 prep_headers (bfd *abfd)
6106 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form. */
6107 struct elf_strtab_hash *shstrtab;
6108 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6110 i_ehdrp = elf_elfheader (abfd);
6112 shstrtab = _bfd_elf_strtab_init ();
6113 if (shstrtab == NULL)
6116 elf_shstrtab (abfd) = shstrtab;
6118 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
6119 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
6120 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
6121 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
6123 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
6124 i_ehdrp->e_ident[EI_DATA] =
6125 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
6126 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
6128 if ((abfd->flags & DYNAMIC) != 0)
6129 i_ehdrp->e_type = ET_DYN;
6130 else if ((abfd->flags & EXEC_P) != 0)
6131 i_ehdrp->e_type = ET_EXEC;
6132 else if (bfd_get_format (abfd) == bfd_core)
6133 i_ehdrp->e_type = ET_CORE;
6135 i_ehdrp->e_type = ET_REL;
6137 switch (bfd_get_arch (abfd))
6139 case bfd_arch_unknown:
6140 i_ehdrp->e_machine = EM_NONE;
6143 /* There used to be a long list of cases here, each one setting
6144 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
6145 in the corresponding bfd definition. To avoid duplication,
6146 the switch was removed. Machines that need special handling
6147 can generally do it in elf_backend_final_write_processing(),
6148 unless they need the information earlier than the final write.
6149 Such need can generally be supplied by replacing the tests for
6150 e_machine with the conditions used to determine it. */
6152 i_ehdrp->e_machine = bed->elf_machine_code;
6155 i_ehdrp->e_version = bed->s->ev_current;
6156 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
6158 /* No program header, for now. */
6159 i_ehdrp->e_phoff = 0;
6160 i_ehdrp->e_phentsize = 0;
6161 i_ehdrp->e_phnum = 0;
6163 /* Each bfd section is section header entry. */
6164 i_ehdrp->e_entry = bfd_get_start_address (abfd);
6165 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
6167 /* If we're building an executable, we'll need a program header table. */
6168 if (abfd->flags & EXEC_P)
6169 /* It all happens later. */
6173 i_ehdrp->e_phentsize = 0;
6174 i_ehdrp->e_phoff = 0;
6177 elf_tdata (abfd)->symtab_hdr.sh_name =
6178 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
6179 elf_tdata (abfd)->strtab_hdr.sh_name =
6180 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
6181 elf_tdata (abfd)->shstrtab_hdr.sh_name =
6182 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
6183 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
6184 || elf_tdata (abfd)->strtab_hdr.sh_name == (unsigned int) -1
6185 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
6191 /* Assign file positions for all the reloc sections which are not part
6192 of the loadable file image, and the file position of section headers. */
6195 _bfd_elf_assign_file_positions_for_non_load (bfd *abfd)
6198 Elf_Internal_Shdr **shdrpp, **end_shdrpp;
6199 Elf_Internal_Shdr *shdrp;
6200 Elf_Internal_Ehdr *i_ehdrp;
6201 const struct elf_backend_data *bed;
6203 off = elf_next_file_pos (abfd);
6205 shdrpp = elf_elfsections (abfd);
6206 end_shdrpp = shdrpp + elf_numsections (abfd);
6207 for (shdrpp++; shdrpp < end_shdrpp; shdrpp++)
6210 if (shdrp->sh_offset == -1)
6212 asection *sec = shdrp->bfd_section;
6213 bfd_boolean is_rel = (shdrp->sh_type == SHT_REL
6214 || shdrp->sh_type == SHT_RELA);
6216 || (sec != NULL && (sec->flags & SEC_ELF_COMPRESS)))
6220 const char *name = sec->name;
6221 struct bfd_elf_section_data *d;
6223 /* Compress DWARF debug sections. */
6224 if (!bfd_compress_section (abfd, sec,
6228 if (sec->compress_status == COMPRESS_SECTION_DONE
6229 && (abfd->flags & BFD_COMPRESS_GABI) == 0)
6231 /* If section is compressed with zlib-gnu, convert
6232 section name from .debug_* to .zdebug_*. */
6234 = convert_debug_to_zdebug (abfd, name);
6235 if (new_name == NULL)
6239 /* Add section name to section name section. */
6240 if (shdrp->sh_name != (unsigned int) -1)
6243 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
6245 d = elf_section_data (sec);
6247 /* Add reloc section name to section name section. */
6249 && !_bfd_elf_set_reloc_sh_name (abfd,
6254 && !_bfd_elf_set_reloc_sh_name (abfd,
6259 /* Update section size and contents. */
6260 shdrp->sh_size = sec->size;
6261 shdrp->contents = sec->contents;
6262 shdrp->bfd_section->contents = NULL;
6264 off = _bfd_elf_assign_file_position_for_section (shdrp,
6271 /* Place section name section after DWARF debug sections have been
6273 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
6274 shdrp = &elf_tdata (abfd)->shstrtab_hdr;
6275 shdrp->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
6276 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
6278 /* Place the section headers. */
6279 i_ehdrp = elf_elfheader (abfd);
6280 bed = get_elf_backend_data (abfd);
6281 off = align_file_position (off, 1 << bed->s->log_file_align);
6282 i_ehdrp->e_shoff = off;
6283 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
6284 elf_next_file_pos (abfd) = off;
6290 _bfd_elf_write_object_contents (bfd *abfd)
6292 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6293 Elf_Internal_Shdr **i_shdrp;
6295 unsigned int count, num_sec;
6296 struct elf_obj_tdata *t;
6298 if (! abfd->output_has_begun
6299 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6302 i_shdrp = elf_elfsections (abfd);
6305 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
6309 if (!_bfd_elf_assign_file_positions_for_non_load (abfd))
6312 /* After writing the headers, we need to write the sections too... */
6313 num_sec = elf_numsections (abfd);
6314 for (count = 1; count < num_sec; count++)
6316 i_shdrp[count]->sh_name
6317 = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
6318 i_shdrp[count]->sh_name);
6319 if (bed->elf_backend_section_processing)
6320 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
6321 if (i_shdrp[count]->contents)
6323 bfd_size_type amt = i_shdrp[count]->sh_size;
6325 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
6326 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
6331 /* Write out the section header names. */
6332 t = elf_tdata (abfd);
6333 if (elf_shstrtab (abfd) != NULL
6334 && (bfd_seek (abfd, t->shstrtab_hdr.sh_offset, SEEK_SET) != 0
6335 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
6338 if (bed->elf_backend_final_write_processing)
6339 (*bed->elf_backend_final_write_processing) (abfd, elf_linker (abfd));
6341 if (!bed->s->write_shdrs_and_ehdr (abfd))
6344 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
6345 if (t->o->build_id.after_write_object_contents != NULL)
6346 return (*t->o->build_id.after_write_object_contents) (abfd);
6352 _bfd_elf_write_corefile_contents (bfd *abfd)
6354 /* Hopefully this can be done just like an object file. */
6355 return _bfd_elf_write_object_contents (abfd);
6358 /* Given a section, search the header to find them. */
6361 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
6363 const struct elf_backend_data *bed;
6364 unsigned int sec_index;
6366 if (elf_section_data (asect) != NULL
6367 && elf_section_data (asect)->this_idx != 0)
6368 return elf_section_data (asect)->this_idx;
6370 if (bfd_is_abs_section (asect))
6371 sec_index = SHN_ABS;
6372 else if (bfd_is_com_section (asect))
6373 sec_index = SHN_COMMON;
6374 else if (bfd_is_und_section (asect))
6375 sec_index = SHN_UNDEF;
6377 sec_index = SHN_BAD;
6379 bed = get_elf_backend_data (abfd);
6380 if (bed->elf_backend_section_from_bfd_section)
6382 int retval = sec_index;
6384 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
6388 if (sec_index == SHN_BAD)
6389 bfd_set_error (bfd_error_nonrepresentable_section);
6394 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
6398 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
6400 asymbol *asym_ptr = *asym_ptr_ptr;
6402 flagword flags = asym_ptr->flags;
6404 /* When gas creates relocations against local labels, it creates its
6405 own symbol for the section, but does put the symbol into the
6406 symbol chain, so udata is 0. When the linker is generating
6407 relocatable output, this section symbol may be for one of the
6408 input sections rather than the output section. */
6409 if (asym_ptr->udata.i == 0
6410 && (flags & BSF_SECTION_SYM)
6411 && asym_ptr->section)
6416 sec = asym_ptr->section;
6417 if (sec->owner != abfd && sec->output_section != NULL)
6418 sec = sec->output_section;
6419 if (sec->owner == abfd
6420 && (indx = sec->index) < elf_num_section_syms (abfd)
6421 && elf_section_syms (abfd)[indx] != NULL)
6422 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
6425 idx = asym_ptr->udata.i;
6429 /* This case can occur when using --strip-symbol on a symbol
6430 which is used in a relocation entry. */
6432 /* xgettext:c-format */
6433 (_("%B: symbol `%s' required but not present"),
6434 abfd, bfd_asymbol_name (asym_ptr));
6435 bfd_set_error (bfd_error_no_symbols);
6442 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx\n",
6443 (long) asym_ptr, asym_ptr->name, idx, (long) flags);
6451 /* Rewrite program header information. */
6454 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
6456 Elf_Internal_Ehdr *iehdr;
6457 struct elf_segment_map *map;
6458 struct elf_segment_map *map_first;
6459 struct elf_segment_map **pointer_to_map;
6460 Elf_Internal_Phdr *segment;
6463 unsigned int num_segments;
6464 bfd_boolean phdr_included = FALSE;
6465 bfd_boolean p_paddr_valid;
6466 bfd_vma maxpagesize;
6467 struct elf_segment_map *phdr_adjust_seg = NULL;
6468 unsigned int phdr_adjust_num = 0;
6469 const struct elf_backend_data *bed;
6471 bed = get_elf_backend_data (ibfd);
6472 iehdr = elf_elfheader (ibfd);
6475 pointer_to_map = &map_first;
6477 num_segments = elf_elfheader (ibfd)->e_phnum;
6478 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
6480 /* Returns the end address of the segment + 1. */
6481 #define SEGMENT_END(segment, start) \
6482 (start + (segment->p_memsz > segment->p_filesz \
6483 ? segment->p_memsz : segment->p_filesz))
6485 #define SECTION_SIZE(section, segment) \
6486 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
6487 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
6488 ? section->size : 0)
6490 /* Returns TRUE if the given section is contained within
6491 the given segment. VMA addresses are compared. */
6492 #define IS_CONTAINED_BY_VMA(section, segment) \
6493 (section->vma >= segment->p_vaddr \
6494 && (section->vma + SECTION_SIZE (section, segment) \
6495 <= (SEGMENT_END (segment, segment->p_vaddr))))
6497 /* Returns TRUE if the given section is contained within
6498 the given segment. LMA addresses are compared. */
6499 #define IS_CONTAINED_BY_LMA(section, segment, base) \
6500 (section->lma >= base \
6501 && (section->lma + SECTION_SIZE (section, segment) \
6502 <= SEGMENT_END (segment, base)))
6504 /* Handle PT_NOTE segment. */
6505 #define IS_NOTE(p, s) \
6506 (p->p_type == PT_NOTE \
6507 && elf_section_type (s) == SHT_NOTE \
6508 && (bfd_vma) s->filepos >= p->p_offset \
6509 && ((bfd_vma) s->filepos + s->size \
6510 <= p->p_offset + p->p_filesz))
6512 /* Special case: corefile "NOTE" section containing regs, prpsinfo
6514 #define IS_COREFILE_NOTE(p, s) \
6516 && bfd_get_format (ibfd) == bfd_core \
6520 /* The complicated case when p_vaddr is 0 is to handle the Solaris
6521 linker, which generates a PT_INTERP section with p_vaddr and
6522 p_memsz set to 0. */
6523 #define IS_SOLARIS_PT_INTERP(p, s) \
6525 && p->p_paddr == 0 \
6526 && p->p_memsz == 0 \
6527 && p->p_filesz > 0 \
6528 && (s->flags & SEC_HAS_CONTENTS) != 0 \
6530 && (bfd_vma) s->filepos >= p->p_offset \
6531 && ((bfd_vma) s->filepos + s->size \
6532 <= p->p_offset + p->p_filesz))
6534 /* Decide if the given section should be included in the given segment.
6535 A section will be included if:
6536 1. It is within the address space of the segment -- we use the LMA
6537 if that is set for the segment and the VMA otherwise,
6538 2. It is an allocated section or a NOTE section in a PT_NOTE
6540 3. There is an output section associated with it,
6541 4. The section has not already been allocated to a previous segment.
6542 5. PT_GNU_STACK segments do not include any sections.
6543 6. PT_TLS segment includes only SHF_TLS sections.
6544 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
6545 8. PT_DYNAMIC should not contain empty sections at the beginning
6546 (with the possible exception of .dynamic). */
6547 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
6548 ((((segment->p_paddr \
6549 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
6550 : IS_CONTAINED_BY_VMA (section, segment)) \
6551 && (section->flags & SEC_ALLOC) != 0) \
6552 || IS_NOTE (segment, section)) \
6553 && segment->p_type != PT_GNU_STACK \
6554 && (segment->p_type != PT_TLS \
6555 || (section->flags & SEC_THREAD_LOCAL)) \
6556 && (segment->p_type == PT_LOAD \
6557 || segment->p_type == PT_TLS \
6558 || (section->flags & SEC_THREAD_LOCAL) == 0) \
6559 && (segment->p_type != PT_DYNAMIC \
6560 || SECTION_SIZE (section, segment) > 0 \
6561 || (segment->p_paddr \
6562 ? segment->p_paddr != section->lma \
6563 : segment->p_vaddr != section->vma) \
6564 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
6566 && !section->segment_mark)
6568 /* If the output section of a section in the input segment is NULL,
6569 it is removed from the corresponding output segment. */
6570 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
6571 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
6572 && section->output_section != NULL)
6574 /* Returns TRUE iff seg1 starts after the end of seg2. */
6575 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
6576 (seg1->field >= SEGMENT_END (seg2, seg2->field))
6578 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
6579 their VMA address ranges and their LMA address ranges overlap.
6580 It is possible to have overlapping VMA ranges without overlapping LMA
6581 ranges. RedBoot images for example can have both .data and .bss mapped
6582 to the same VMA range, but with the .data section mapped to a different
6584 #define SEGMENT_OVERLAPS(seg1, seg2) \
6585 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
6586 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
6587 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
6588 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
6590 /* Initialise the segment mark field. */
6591 for (section = ibfd->sections; section != NULL; section = section->next)
6592 section->segment_mark = FALSE;
6594 /* The Solaris linker creates program headers in which all the
6595 p_paddr fields are zero. When we try to objcopy or strip such a
6596 file, we get confused. Check for this case, and if we find it
6597 don't set the p_paddr_valid fields. */
6598 p_paddr_valid = FALSE;
6599 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6602 if (segment->p_paddr != 0)
6604 p_paddr_valid = TRUE;
6608 /* Scan through the segments specified in the program header
6609 of the input BFD. For this first scan we look for overlaps
6610 in the loadable segments. These can be created by weird
6611 parameters to objcopy. Also, fix some solaris weirdness. */
6612 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6617 Elf_Internal_Phdr *segment2;
6619 if (segment->p_type == PT_INTERP)
6620 for (section = ibfd->sections; section; section = section->next)
6621 if (IS_SOLARIS_PT_INTERP (segment, section))
6623 /* Mininal change so that the normal section to segment
6624 assignment code will work. */
6625 segment->p_vaddr = section->vma;
6629 if (segment->p_type != PT_LOAD)
6631 /* Remove PT_GNU_RELRO segment. */
6632 if (segment->p_type == PT_GNU_RELRO)
6633 segment->p_type = PT_NULL;
6637 /* Determine if this segment overlaps any previous segments. */
6638 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++)
6640 bfd_signed_vma extra_length;
6642 if (segment2->p_type != PT_LOAD
6643 || !SEGMENT_OVERLAPS (segment, segment2))
6646 /* Merge the two segments together. */
6647 if (segment2->p_vaddr < segment->p_vaddr)
6649 /* Extend SEGMENT2 to include SEGMENT and then delete
6651 extra_length = (SEGMENT_END (segment, segment->p_vaddr)
6652 - SEGMENT_END (segment2, segment2->p_vaddr));
6654 if (extra_length > 0)
6656 segment2->p_memsz += extra_length;
6657 segment2->p_filesz += extra_length;
6660 segment->p_type = PT_NULL;
6662 /* Since we have deleted P we must restart the outer loop. */
6664 segment = elf_tdata (ibfd)->phdr;
6669 /* Extend SEGMENT to include SEGMENT2 and then delete
6671 extra_length = (SEGMENT_END (segment2, segment2->p_vaddr)
6672 - SEGMENT_END (segment, segment->p_vaddr));
6674 if (extra_length > 0)
6676 segment->p_memsz += extra_length;
6677 segment->p_filesz += extra_length;
6680 segment2->p_type = PT_NULL;
6685 /* The second scan attempts to assign sections to segments. */
6686 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6690 unsigned int section_count;
6691 asection **sections;
6692 asection *output_section;
6694 bfd_vma matching_lma;
6695 bfd_vma suggested_lma;
6698 asection *first_section;
6699 bfd_boolean first_matching_lma;
6700 bfd_boolean first_suggested_lma;
6702 if (segment->p_type == PT_NULL)
6705 first_section = NULL;
6706 /* Compute how many sections might be placed into this segment. */
6707 for (section = ibfd->sections, section_count = 0;
6709 section = section->next)
6711 /* Find the first section in the input segment, which may be
6712 removed from the corresponding output segment. */
6713 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
6715 if (first_section == NULL)
6716 first_section = section;
6717 if (section->output_section != NULL)
6722 /* Allocate a segment map big enough to contain
6723 all of the sections we have selected. */
6724 amt = sizeof (struct elf_segment_map);
6725 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
6726 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
6730 /* Initialise the fields of the segment map. Default to
6731 using the physical address of the segment in the input BFD. */
6733 map->p_type = segment->p_type;
6734 map->p_flags = segment->p_flags;
6735 map->p_flags_valid = 1;
6737 /* If the first section in the input segment is removed, there is
6738 no need to preserve segment physical address in the corresponding
6740 if (!first_section || first_section->output_section != NULL)
6742 map->p_paddr = segment->p_paddr;
6743 map->p_paddr_valid = p_paddr_valid;
6746 /* Determine if this segment contains the ELF file header
6747 and if it contains the program headers themselves. */
6748 map->includes_filehdr = (segment->p_offset == 0
6749 && segment->p_filesz >= iehdr->e_ehsize);
6750 map->includes_phdrs = 0;
6752 if (!phdr_included || segment->p_type != PT_LOAD)
6754 map->includes_phdrs =
6755 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
6756 && (segment->p_offset + segment->p_filesz
6757 >= ((bfd_vma) iehdr->e_phoff
6758 + iehdr->e_phnum * iehdr->e_phentsize)));
6760 if (segment->p_type == PT_LOAD && map->includes_phdrs)
6761 phdr_included = TRUE;
6764 if (section_count == 0)
6766 /* Special segments, such as the PT_PHDR segment, may contain
6767 no sections, but ordinary, loadable segments should contain
6768 something. They are allowed by the ELF spec however, so only
6769 a warning is produced.
6770 There is however the valid use case of embedded systems which
6771 have segments with p_filesz of 0 and a p_memsz > 0 to initialize
6772 flash memory with zeros. No warning is shown for that case. */
6773 if (segment->p_type == PT_LOAD
6774 && (segment->p_filesz > 0 || segment->p_memsz == 0))
6775 /* xgettext:c-format */
6776 _bfd_error_handler (_("\
6777 %B: warning: Empty loadable segment detected at vaddr=0x%.8x, is this intentional ?"),
6778 ibfd, segment->p_vaddr);
6781 *pointer_to_map = map;
6782 pointer_to_map = &map->next;
6787 /* Now scan the sections in the input BFD again and attempt
6788 to add their corresponding output sections to the segment map.
6789 The problem here is how to handle an output section which has
6790 been moved (ie had its LMA changed). There are four possibilities:
6792 1. None of the sections have been moved.
6793 In this case we can continue to use the segment LMA from the
6796 2. All of the sections have been moved by the same amount.
6797 In this case we can change the segment's LMA to match the LMA
6798 of the first section.
6800 3. Some of the sections have been moved, others have not.
6801 In this case those sections which have not been moved can be
6802 placed in the current segment which will have to have its size,
6803 and possibly its LMA changed, and a new segment or segments will
6804 have to be created to contain the other sections.
6806 4. The sections have been moved, but not by the same amount.
6807 In this case we can change the segment's LMA to match the LMA
6808 of the first section and we will have to create a new segment
6809 or segments to contain the other sections.
6811 In order to save time, we allocate an array to hold the section
6812 pointers that we are interested in. As these sections get assigned
6813 to a segment, they are removed from this array. */
6815 sections = (asection **) bfd_malloc2 (section_count, sizeof (asection *));
6816 if (sections == NULL)
6819 /* Step One: Scan for segment vs section LMA conflicts.
6820 Also add the sections to the section array allocated above.
6821 Also add the sections to the current segment. In the common
6822 case, where the sections have not been moved, this means that
6823 we have completely filled the segment, and there is nothing
6828 first_matching_lma = TRUE;
6829 first_suggested_lma = TRUE;
6831 for (section = first_section, j = 0;
6833 section = section->next)
6835 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
6837 output_section = section->output_section;
6839 sections[j++] = section;
6841 /* The Solaris native linker always sets p_paddr to 0.
6842 We try to catch that case here, and set it to the
6843 correct value. Note - some backends require that
6844 p_paddr be left as zero. */
6846 && segment->p_vaddr != 0
6847 && !bed->want_p_paddr_set_to_zero
6849 && output_section->lma != 0
6850 && output_section->vma == (segment->p_vaddr
6851 + (map->includes_filehdr
6854 + (map->includes_phdrs
6856 * iehdr->e_phentsize)
6858 map->p_paddr = segment->p_vaddr;
6860 /* Match up the physical address of the segment with the
6861 LMA address of the output section. */
6862 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
6863 || IS_COREFILE_NOTE (segment, section)
6864 || (bed->want_p_paddr_set_to_zero
6865 && IS_CONTAINED_BY_VMA (output_section, segment)))
6867 if (first_matching_lma || output_section->lma < matching_lma)
6869 matching_lma = output_section->lma;
6870 first_matching_lma = FALSE;
6873 /* We assume that if the section fits within the segment
6874 then it does not overlap any other section within that
6876 map->sections[isec++] = output_section;
6878 else if (first_suggested_lma)
6880 suggested_lma = output_section->lma;
6881 first_suggested_lma = FALSE;
6884 if (j == section_count)
6889 BFD_ASSERT (j == section_count);
6891 /* Step Two: Adjust the physical address of the current segment,
6893 if (isec == section_count)
6895 /* All of the sections fitted within the segment as currently
6896 specified. This is the default case. Add the segment to
6897 the list of built segments and carry on to process the next
6898 program header in the input BFD. */
6899 map->count = section_count;
6900 *pointer_to_map = map;
6901 pointer_to_map = &map->next;
6904 && !bed->want_p_paddr_set_to_zero
6905 && matching_lma != map->p_paddr
6906 && !map->includes_filehdr
6907 && !map->includes_phdrs)
6908 /* There is some padding before the first section in the
6909 segment. So, we must account for that in the output
6911 map->p_vaddr_offset = matching_lma - map->p_paddr;
6918 if (!first_matching_lma)
6920 /* At least one section fits inside the current segment.
6921 Keep it, but modify its physical address to match the
6922 LMA of the first section that fitted. */
6923 map->p_paddr = matching_lma;
6927 /* None of the sections fitted inside the current segment.
6928 Change the current segment's physical address to match
6929 the LMA of the first section. */
6930 map->p_paddr = suggested_lma;
6933 /* Offset the segment physical address from the lma
6934 to allow for space taken up by elf headers. */
6935 if (map->includes_filehdr)
6937 if (map->p_paddr >= iehdr->e_ehsize)
6938 map->p_paddr -= iehdr->e_ehsize;
6941 map->includes_filehdr = FALSE;
6942 map->includes_phdrs = FALSE;
6946 if (map->includes_phdrs)
6948 if (map->p_paddr >= iehdr->e_phnum * iehdr->e_phentsize)
6950 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
6952 /* iehdr->e_phnum is just an estimate of the number
6953 of program headers that we will need. Make a note
6954 here of the number we used and the segment we chose
6955 to hold these headers, so that we can adjust the
6956 offset when we know the correct value. */
6957 phdr_adjust_num = iehdr->e_phnum;
6958 phdr_adjust_seg = map;
6961 map->includes_phdrs = FALSE;
6965 /* Step Three: Loop over the sections again, this time assigning
6966 those that fit to the current segment and removing them from the
6967 sections array; but making sure not to leave large gaps. Once all
6968 possible sections have been assigned to the current segment it is
6969 added to the list of built segments and if sections still remain
6970 to be assigned, a new segment is constructed before repeating
6977 first_suggested_lma = TRUE;
6979 /* Fill the current segment with sections that fit. */
6980 for (j = 0; j < section_count; j++)
6982 section = sections[j];
6984 if (section == NULL)
6987 output_section = section->output_section;
6989 BFD_ASSERT (output_section != NULL);
6991 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
6992 || IS_COREFILE_NOTE (segment, section))
6994 if (map->count == 0)
6996 /* If the first section in a segment does not start at
6997 the beginning of the segment, then something is
6999 if (output_section->lma
7001 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
7002 + (map->includes_phdrs
7003 ? iehdr->e_phnum * iehdr->e_phentsize
7011 prev_sec = map->sections[map->count - 1];
7013 /* If the gap between the end of the previous section
7014 and the start of this section is more than
7015 maxpagesize then we need to start a new segment. */
7016 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
7018 < BFD_ALIGN (output_section->lma, maxpagesize))
7019 || (prev_sec->lma + prev_sec->size
7020 > output_section->lma))
7022 if (first_suggested_lma)
7024 suggested_lma = output_section->lma;
7025 first_suggested_lma = FALSE;
7032 map->sections[map->count++] = output_section;
7035 section->segment_mark = TRUE;
7037 else if (first_suggested_lma)
7039 suggested_lma = output_section->lma;
7040 first_suggested_lma = FALSE;
7044 BFD_ASSERT (map->count > 0);
7046 /* Add the current segment to the list of built segments. */
7047 *pointer_to_map = map;
7048 pointer_to_map = &map->next;
7050 if (isec < section_count)
7052 /* We still have not allocated all of the sections to
7053 segments. Create a new segment here, initialise it
7054 and carry on looping. */
7055 amt = sizeof (struct elf_segment_map);
7056 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
7057 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
7064 /* Initialise the fields of the segment map. Set the physical
7065 physical address to the LMA of the first section that has
7066 not yet been assigned. */
7068 map->p_type = segment->p_type;
7069 map->p_flags = segment->p_flags;
7070 map->p_flags_valid = 1;
7071 map->p_paddr = suggested_lma;
7072 map->p_paddr_valid = p_paddr_valid;
7073 map->includes_filehdr = 0;
7074 map->includes_phdrs = 0;
7077 while (isec < section_count);
7082 elf_seg_map (obfd) = map_first;
7084 /* If we had to estimate the number of program headers that were
7085 going to be needed, then check our estimate now and adjust
7086 the offset if necessary. */
7087 if (phdr_adjust_seg != NULL)
7091 for (count = 0, map = map_first; map != NULL; map = map->next)
7094 if (count > phdr_adjust_num)
7095 phdr_adjust_seg->p_paddr
7096 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
7101 #undef IS_CONTAINED_BY_VMA
7102 #undef IS_CONTAINED_BY_LMA
7104 #undef IS_COREFILE_NOTE
7105 #undef IS_SOLARIS_PT_INTERP
7106 #undef IS_SECTION_IN_INPUT_SEGMENT
7107 #undef INCLUDE_SECTION_IN_SEGMENT
7108 #undef SEGMENT_AFTER_SEGMENT
7109 #undef SEGMENT_OVERLAPS
7113 /* Copy ELF program header information. */
7116 copy_elf_program_header (bfd *ibfd, bfd *obfd)
7118 Elf_Internal_Ehdr *iehdr;
7119 struct elf_segment_map *map;
7120 struct elf_segment_map *map_first;
7121 struct elf_segment_map **pointer_to_map;
7122 Elf_Internal_Phdr *segment;
7124 unsigned int num_segments;
7125 bfd_boolean phdr_included = FALSE;
7126 bfd_boolean p_paddr_valid;
7128 iehdr = elf_elfheader (ibfd);
7131 pointer_to_map = &map_first;
7133 /* If all the segment p_paddr fields are zero, don't set
7134 map->p_paddr_valid. */
7135 p_paddr_valid = FALSE;
7136 num_segments = elf_elfheader (ibfd)->e_phnum;
7137 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7140 if (segment->p_paddr != 0)
7142 p_paddr_valid = TRUE;
7146 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7151 unsigned int section_count;
7153 Elf_Internal_Shdr *this_hdr;
7154 asection *first_section = NULL;
7155 asection *lowest_section;
7157 /* Compute how many sections are in this segment. */
7158 for (section = ibfd->sections, section_count = 0;
7160 section = section->next)
7162 this_hdr = &(elf_section_data(section)->this_hdr);
7163 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7165 if (first_section == NULL)
7166 first_section = section;
7171 /* Allocate a segment map big enough to contain
7172 all of the sections we have selected. */
7173 amt = sizeof (struct elf_segment_map);
7174 if (section_count != 0)
7175 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
7176 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
7180 /* Initialize the fields of the output segment map with the
7183 map->p_type = segment->p_type;
7184 map->p_flags = segment->p_flags;
7185 map->p_flags_valid = 1;
7186 map->p_paddr = segment->p_paddr;
7187 map->p_paddr_valid = p_paddr_valid;
7188 map->p_align = segment->p_align;
7189 map->p_align_valid = 1;
7190 map->p_vaddr_offset = 0;
7192 if (map->p_type == PT_GNU_RELRO
7193 || map->p_type == PT_GNU_STACK)
7195 /* The PT_GNU_RELRO segment may contain the first a few
7196 bytes in the .got.plt section even if the whole .got.plt
7197 section isn't in the PT_GNU_RELRO segment. We won't
7198 change the size of the PT_GNU_RELRO segment.
7199 Similarly, PT_GNU_STACK size is significant on uclinux
7201 map->p_size = segment->p_memsz;
7202 map->p_size_valid = 1;
7205 /* Determine if this segment contains the ELF file header
7206 and if it contains the program headers themselves. */
7207 map->includes_filehdr = (segment->p_offset == 0
7208 && segment->p_filesz >= iehdr->e_ehsize);
7210 map->includes_phdrs = 0;
7211 if (! phdr_included || segment->p_type != PT_LOAD)
7213 map->includes_phdrs =
7214 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
7215 && (segment->p_offset + segment->p_filesz
7216 >= ((bfd_vma) iehdr->e_phoff
7217 + iehdr->e_phnum * iehdr->e_phentsize)));
7219 if (segment->p_type == PT_LOAD && map->includes_phdrs)
7220 phdr_included = TRUE;
7223 lowest_section = NULL;
7224 if (section_count != 0)
7226 unsigned int isec = 0;
7228 for (section = first_section;
7230 section = section->next)
7232 this_hdr = &(elf_section_data(section)->this_hdr);
7233 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7235 map->sections[isec++] = section->output_section;
7236 if ((section->flags & SEC_ALLOC) != 0)
7240 if (lowest_section == NULL
7241 || section->lma < lowest_section->lma)
7242 lowest_section = section;
7244 /* Section lmas are set up from PT_LOAD header
7245 p_paddr in _bfd_elf_make_section_from_shdr.
7246 If this header has a p_paddr that disagrees
7247 with the section lma, flag the p_paddr as
7249 if ((section->flags & SEC_LOAD) != 0)
7250 seg_off = this_hdr->sh_offset - segment->p_offset;
7252 seg_off = this_hdr->sh_addr - segment->p_vaddr;
7253 if (section->lma - segment->p_paddr != seg_off)
7254 map->p_paddr_valid = FALSE;
7256 if (isec == section_count)
7262 if (map->includes_filehdr && lowest_section != NULL)
7263 /* We need to keep the space used by the headers fixed. */
7264 map->header_size = lowest_section->vma - segment->p_vaddr;
7266 if (!map->includes_phdrs
7267 && !map->includes_filehdr
7268 && map->p_paddr_valid)
7269 /* There is some other padding before the first section. */
7270 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
7271 - segment->p_paddr);
7273 map->count = section_count;
7274 *pointer_to_map = map;
7275 pointer_to_map = &map->next;
7278 elf_seg_map (obfd) = map_first;
7282 /* Copy private BFD data. This copies or rewrites ELF program header
7286 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
7288 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7289 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7292 if (elf_tdata (ibfd)->phdr == NULL)
7295 if (ibfd->xvec == obfd->xvec)
7297 /* Check to see if any sections in the input BFD
7298 covered by ELF program header have changed. */
7299 Elf_Internal_Phdr *segment;
7300 asection *section, *osec;
7301 unsigned int i, num_segments;
7302 Elf_Internal_Shdr *this_hdr;
7303 const struct elf_backend_data *bed;
7305 bed = get_elf_backend_data (ibfd);
7307 /* Regenerate the segment map if p_paddr is set to 0. */
7308 if (bed->want_p_paddr_set_to_zero)
7311 /* Initialize the segment mark field. */
7312 for (section = obfd->sections; section != NULL;
7313 section = section->next)
7314 section->segment_mark = FALSE;
7316 num_segments = elf_elfheader (ibfd)->e_phnum;
7317 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7321 /* PR binutils/3535. The Solaris linker always sets the p_paddr
7322 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
7323 which severly confuses things, so always regenerate the segment
7324 map in this case. */
7325 if (segment->p_paddr == 0
7326 && segment->p_memsz == 0
7327 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
7330 for (section = ibfd->sections;
7331 section != NULL; section = section->next)
7333 /* We mark the output section so that we know it comes
7334 from the input BFD. */
7335 osec = section->output_section;
7337 osec->segment_mark = TRUE;
7339 /* Check if this section is covered by the segment. */
7340 this_hdr = &(elf_section_data(section)->this_hdr);
7341 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7343 /* FIXME: Check if its output section is changed or
7344 removed. What else do we need to check? */
7346 || section->flags != osec->flags
7347 || section->lma != osec->lma
7348 || section->vma != osec->vma
7349 || section->size != osec->size
7350 || section->rawsize != osec->rawsize
7351 || section->alignment_power != osec->alignment_power)
7357 /* Check to see if any output section do not come from the
7359 for (section = obfd->sections; section != NULL;
7360 section = section->next)
7362 if (!section->segment_mark)
7365 section->segment_mark = FALSE;
7368 return copy_elf_program_header (ibfd, obfd);
7372 if (ibfd->xvec == obfd->xvec)
7374 /* When rewriting program header, set the output maxpagesize to
7375 the maximum alignment of input PT_LOAD segments. */
7376 Elf_Internal_Phdr *segment;
7378 unsigned int num_segments = elf_elfheader (ibfd)->e_phnum;
7379 bfd_vma maxpagesize = 0;
7381 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7384 if (segment->p_type == PT_LOAD
7385 && maxpagesize < segment->p_align)
7387 /* PR 17512: file: f17299af. */
7388 if (segment->p_align > (bfd_vma) 1 << ((sizeof (bfd_vma) * 8) - 2))
7389 /* xgettext:c-format */
7390 _bfd_error_handler (_("\
7391 %B: warning: segment alignment of 0x%llx is too large"),
7392 ibfd, (long long) segment->p_align);
7394 maxpagesize = segment->p_align;
7397 if (maxpagesize != get_elf_backend_data (obfd)->maxpagesize)
7398 bfd_emul_set_maxpagesize (bfd_get_target (obfd), maxpagesize);
7401 return rewrite_elf_program_header (ibfd, obfd);
7404 /* Initialize private output section information from input section. */
7407 _bfd_elf_init_private_section_data (bfd *ibfd,
7411 struct bfd_link_info *link_info)
7414 Elf_Internal_Shdr *ihdr, *ohdr;
7415 bfd_boolean final_link = (link_info != NULL
7416 && !bfd_link_relocatable (link_info));
7418 if (ibfd->xvec->flavour != bfd_target_elf_flavour
7419 || obfd->xvec->flavour != bfd_target_elf_flavour)
7422 BFD_ASSERT (elf_section_data (osec) != NULL);
7424 /* For objcopy and relocatable link, don't copy the output ELF
7425 section type from input if the output BFD section flags have been
7426 set to something different. For a final link allow some flags
7427 that the linker clears to differ. */
7428 if (elf_section_type (osec) == SHT_NULL
7429 && (osec->flags == isec->flags
7431 && ((osec->flags ^ isec->flags)
7432 & ~(SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_RELOC)) == 0)))
7433 elf_section_type (osec) = elf_section_type (isec);
7435 /* FIXME: Is this correct for all OS/PROC specific flags? */
7436 elf_section_flags (osec) |= (elf_section_flags (isec)
7437 & (SHF_MASKOS | SHF_MASKPROC));
7439 /* Copy sh_info from input for mbind section. */
7440 if (elf_section_flags (isec) & SHF_GNU_MBIND)
7441 elf_section_data (osec)->this_hdr.sh_info
7442 = elf_section_data (isec)->this_hdr.sh_info;
7444 /* Set things up for objcopy and relocatable link. The output
7445 SHT_GROUP section will have its elf_next_in_group pointing back
7446 to the input group members. Ignore linker created group section.
7447 See elfNN_ia64_object_p in elfxx-ia64.c. */
7448 if ((link_info == NULL
7449 || !link_info->resolve_section_groups)
7450 && (elf_sec_group (isec) == NULL
7451 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0))
7453 if (elf_section_flags (isec) & SHF_GROUP)
7454 elf_section_flags (osec) |= SHF_GROUP;
7455 elf_next_in_group (osec) = elf_next_in_group (isec);
7456 elf_section_data (osec)->group = elf_section_data (isec)->group;
7459 /* If not decompress, preserve SHF_COMPRESSED. */
7460 if (!final_link && (ibfd->flags & BFD_DECOMPRESS) == 0)
7461 elf_section_flags (osec) |= (elf_section_flags (isec)
7464 ihdr = &elf_section_data (isec)->this_hdr;
7466 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
7467 don't use the output section of the linked-to section since it
7468 may be NULL at this point. */
7469 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
7471 ohdr = &elf_section_data (osec)->this_hdr;
7472 ohdr->sh_flags |= SHF_LINK_ORDER;
7473 elf_linked_to_section (osec) = elf_linked_to_section (isec);
7476 osec->use_rela_p = isec->use_rela_p;
7481 /* Copy private section information. This copies over the entsize
7482 field, and sometimes the info field. */
7485 _bfd_elf_copy_private_section_data (bfd *ibfd,
7490 Elf_Internal_Shdr *ihdr, *ohdr;
7492 if (ibfd->xvec->flavour != bfd_target_elf_flavour
7493 || obfd->xvec->flavour != bfd_target_elf_flavour)
7496 ihdr = &elf_section_data (isec)->this_hdr;
7497 ohdr = &elf_section_data (osec)->this_hdr;
7499 ohdr->sh_entsize = ihdr->sh_entsize;
7501 if (ihdr->sh_type == SHT_SYMTAB
7502 || ihdr->sh_type == SHT_DYNSYM
7503 || ihdr->sh_type == SHT_GNU_verneed
7504 || ihdr->sh_type == SHT_GNU_verdef)
7505 ohdr->sh_info = ihdr->sh_info;
7507 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
7511 /* Look at all the SHT_GROUP sections in IBFD, making any adjustments
7512 necessary if we are removing either the SHT_GROUP section or any of
7513 the group member sections. DISCARDED is the value that a section's
7514 output_section has if the section will be discarded, NULL when this
7515 function is called from objcopy, bfd_abs_section_ptr when called
7519 _bfd_elf_fixup_group_sections (bfd *ibfd, asection *discarded)
7523 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
7524 if (elf_section_type (isec) == SHT_GROUP)
7526 asection *first = elf_next_in_group (isec);
7527 asection *s = first;
7528 bfd_size_type removed = 0;
7532 /* If this member section is being output but the
7533 SHT_GROUP section is not, then clear the group info
7534 set up by _bfd_elf_copy_private_section_data. */
7535 if (s->output_section != discarded
7536 && isec->output_section == discarded)
7538 elf_section_flags (s->output_section) &= ~SHF_GROUP;
7539 elf_group_name (s->output_section) = NULL;
7541 /* Conversely, if the member section is not being output
7542 but the SHT_GROUP section is, then adjust its size. */
7543 else if (s->output_section == discarded
7544 && isec->output_section != discarded)
7546 s = elf_next_in_group (s);
7552 if (discarded != NULL)
7554 /* If we've been called for ld -r, then we need to
7555 adjust the input section size. This function may
7556 be called multiple times, so save the original
7558 if (isec->rawsize == 0)
7559 isec->rawsize = isec->size;
7560 isec->size = isec->rawsize - removed;
7564 /* Adjust the output section size when called from
7566 isec->output_section->size -= removed;
7574 /* Copy private header information. */
7577 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
7579 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7580 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7583 /* Copy over private BFD data if it has not already been copied.
7584 This must be done here, rather than in the copy_private_bfd_data
7585 entry point, because the latter is called after the section
7586 contents have been set, which means that the program headers have
7587 already been worked out. */
7588 if (elf_seg_map (obfd) == NULL && elf_tdata (ibfd)->phdr != NULL)
7590 if (! copy_private_bfd_data (ibfd, obfd))
7594 return _bfd_elf_fixup_group_sections (ibfd, NULL);
7597 /* Copy private symbol information. If this symbol is in a section
7598 which we did not map into a BFD section, try to map the section
7599 index correctly. We use special macro definitions for the mapped
7600 section indices; these definitions are interpreted by the
7601 swap_out_syms function. */
7603 #define MAP_ONESYMTAB (SHN_HIOS + 1)
7604 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
7605 #define MAP_STRTAB (SHN_HIOS + 3)
7606 #define MAP_SHSTRTAB (SHN_HIOS + 4)
7607 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
7610 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
7615 elf_symbol_type *isym, *osym;
7617 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7618 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7621 isym = elf_symbol_from (ibfd, isymarg);
7622 osym = elf_symbol_from (obfd, osymarg);
7625 && isym->internal_elf_sym.st_shndx != 0
7627 && bfd_is_abs_section (isym->symbol.section))
7631 shndx = isym->internal_elf_sym.st_shndx;
7632 if (shndx == elf_onesymtab (ibfd))
7633 shndx = MAP_ONESYMTAB;
7634 else if (shndx == elf_dynsymtab (ibfd))
7635 shndx = MAP_DYNSYMTAB;
7636 else if (shndx == elf_strtab_sec (ibfd))
7638 else if (shndx == elf_shstrtab_sec (ibfd))
7639 shndx = MAP_SHSTRTAB;
7640 else if (find_section_in_list (shndx, elf_symtab_shndx_list (ibfd)))
7641 shndx = MAP_SYM_SHNDX;
7642 osym->internal_elf_sym.st_shndx = shndx;
7648 /* Swap out the symbols. */
7651 swap_out_syms (bfd *abfd,
7652 struct elf_strtab_hash **sttp,
7655 const struct elf_backend_data *bed;
7658 struct elf_strtab_hash *stt;
7659 Elf_Internal_Shdr *symtab_hdr;
7660 Elf_Internal_Shdr *symtab_shndx_hdr;
7661 Elf_Internal_Shdr *symstrtab_hdr;
7662 struct elf_sym_strtab *symstrtab;
7663 bfd_byte *outbound_syms;
7664 bfd_byte *outbound_shndx;
7665 unsigned long outbound_syms_index;
7666 unsigned long outbound_shndx_index;
7668 unsigned int num_locals;
7670 bfd_boolean name_local_sections;
7672 if (!elf_map_symbols (abfd, &num_locals))
7675 /* Dump out the symtabs. */
7676 stt = _bfd_elf_strtab_init ();
7680 bed = get_elf_backend_data (abfd);
7681 symcount = bfd_get_symcount (abfd);
7682 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7683 symtab_hdr->sh_type = SHT_SYMTAB;
7684 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
7685 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
7686 symtab_hdr->sh_info = num_locals + 1;
7687 symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
7689 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
7690 symstrtab_hdr->sh_type = SHT_STRTAB;
7692 /* Allocate buffer to swap out the .strtab section. */
7693 symstrtab = (struct elf_sym_strtab *) bfd_malloc ((symcount + 1)
7694 * sizeof (*symstrtab));
7695 if (symstrtab == NULL)
7697 _bfd_elf_strtab_free (stt);
7701 outbound_syms = (bfd_byte *) bfd_alloc2 (abfd, 1 + symcount,
7702 bed->s->sizeof_sym);
7703 if (outbound_syms == NULL)
7706 _bfd_elf_strtab_free (stt);
7710 symtab_hdr->contents = outbound_syms;
7711 outbound_syms_index = 0;
7713 outbound_shndx = NULL;
7714 outbound_shndx_index = 0;
7716 if (elf_symtab_shndx_list (abfd))
7718 symtab_shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr;
7719 if (symtab_shndx_hdr->sh_name != 0)
7721 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
7722 outbound_shndx = (bfd_byte *)
7723 bfd_zalloc2 (abfd, 1 + symcount, sizeof (Elf_External_Sym_Shndx));
7724 if (outbound_shndx == NULL)
7727 symtab_shndx_hdr->contents = outbound_shndx;
7728 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
7729 symtab_shndx_hdr->sh_size = amt;
7730 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
7731 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
7733 /* FIXME: What about any other headers in the list ? */
7736 /* Now generate the data (for "contents"). */
7738 /* Fill in zeroth symbol and swap it out. */
7739 Elf_Internal_Sym sym;
7745 sym.st_shndx = SHN_UNDEF;
7746 sym.st_target_internal = 0;
7747 symstrtab[0].sym = sym;
7748 symstrtab[0].dest_index = outbound_syms_index;
7749 symstrtab[0].destshndx_index = outbound_shndx_index;
7750 outbound_syms_index++;
7751 if (outbound_shndx != NULL)
7752 outbound_shndx_index++;
7756 = (bed->elf_backend_name_local_section_symbols
7757 && bed->elf_backend_name_local_section_symbols (abfd));
7759 syms = bfd_get_outsymbols (abfd);
7760 for (idx = 0; idx < symcount;)
7762 Elf_Internal_Sym sym;
7763 bfd_vma value = syms[idx]->value;
7764 elf_symbol_type *type_ptr;
7765 flagword flags = syms[idx]->flags;
7768 if (!name_local_sections
7769 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
7771 /* Local section symbols have no name. */
7772 sym.st_name = (unsigned long) -1;
7776 /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize
7777 to get the final offset for st_name. */
7779 = (unsigned long) _bfd_elf_strtab_add (stt, syms[idx]->name,
7781 if (sym.st_name == (unsigned long) -1)
7785 type_ptr = elf_symbol_from (abfd, syms[idx]);
7787 if ((flags & BSF_SECTION_SYM) == 0
7788 && bfd_is_com_section (syms[idx]->section))
7790 /* ELF common symbols put the alignment into the `value' field,
7791 and the size into the `size' field. This is backwards from
7792 how BFD handles it, so reverse it here. */
7793 sym.st_size = value;
7794 if (type_ptr == NULL
7795 || type_ptr->internal_elf_sym.st_value == 0)
7796 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
7798 sym.st_value = type_ptr->internal_elf_sym.st_value;
7799 sym.st_shndx = _bfd_elf_section_from_bfd_section
7800 (abfd, syms[idx]->section);
7804 asection *sec = syms[idx]->section;
7807 if (sec->output_section)
7809 value += sec->output_offset;
7810 sec = sec->output_section;
7813 /* Don't add in the section vma for relocatable output. */
7814 if (! relocatable_p)
7816 sym.st_value = value;
7817 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
7819 if (bfd_is_abs_section (sec)
7821 && type_ptr->internal_elf_sym.st_shndx != 0)
7823 /* This symbol is in a real ELF section which we did
7824 not create as a BFD section. Undo the mapping done
7825 by copy_private_symbol_data. */
7826 shndx = type_ptr->internal_elf_sym.st_shndx;
7830 shndx = elf_onesymtab (abfd);
7833 shndx = elf_dynsymtab (abfd);
7836 shndx = elf_strtab_sec (abfd);
7839 shndx = elf_shstrtab_sec (abfd);
7842 if (elf_symtab_shndx_list (abfd))
7843 shndx = elf_symtab_shndx_list (abfd)->ndx;
7852 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
7854 if (shndx == SHN_BAD)
7858 /* Writing this would be a hell of a lot easier if
7859 we had some decent documentation on bfd, and
7860 knew what to expect of the library, and what to
7861 demand of applications. For example, it
7862 appears that `objcopy' might not set the
7863 section of a symbol to be a section that is
7864 actually in the output file. */
7865 sec2 = bfd_get_section_by_name (abfd, sec->name);
7867 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
7868 if (shndx == SHN_BAD)
7870 /* xgettext:c-format */
7871 _bfd_error_handler (_("\
7872 Unable to find equivalent output section for symbol '%s' from section '%s'"),
7873 syms[idx]->name ? syms[idx]->name : "<Local sym>",
7875 bfd_set_error (bfd_error_invalid_operation);
7881 sym.st_shndx = shndx;
7884 if ((flags & BSF_THREAD_LOCAL) != 0)
7886 else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0)
7887 type = STT_GNU_IFUNC;
7888 else if ((flags & BSF_FUNCTION) != 0)
7890 else if ((flags & BSF_OBJECT) != 0)
7892 else if ((flags & BSF_RELC) != 0)
7894 else if ((flags & BSF_SRELC) != 0)
7899 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
7902 /* Processor-specific types. */
7903 if (type_ptr != NULL
7904 && bed->elf_backend_get_symbol_type)
7905 type = ((*bed->elf_backend_get_symbol_type)
7906 (&type_ptr->internal_elf_sym, type));
7908 if (flags & BSF_SECTION_SYM)
7910 if (flags & BSF_GLOBAL)
7911 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
7913 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
7915 else if (bfd_is_com_section (syms[idx]->section))
7917 if (type != STT_TLS)
7919 if ((abfd->flags & BFD_CONVERT_ELF_COMMON))
7920 type = ((abfd->flags & BFD_USE_ELF_STT_COMMON)
7921 ? STT_COMMON : STT_OBJECT);
7923 type = ((flags & BSF_ELF_COMMON) != 0
7924 ? STT_COMMON : STT_OBJECT);
7926 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
7928 else if (bfd_is_und_section (syms[idx]->section))
7929 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
7933 else if (flags & BSF_FILE)
7934 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
7937 int bind = STB_LOCAL;
7939 if (flags & BSF_LOCAL)
7941 else if (flags & BSF_GNU_UNIQUE)
7942 bind = STB_GNU_UNIQUE;
7943 else if (flags & BSF_WEAK)
7945 else if (flags & BSF_GLOBAL)
7948 sym.st_info = ELF_ST_INFO (bind, type);
7951 if (type_ptr != NULL)
7953 sym.st_other = type_ptr->internal_elf_sym.st_other;
7954 sym.st_target_internal
7955 = type_ptr->internal_elf_sym.st_target_internal;
7960 sym.st_target_internal = 0;
7964 symstrtab[idx].sym = sym;
7965 symstrtab[idx].dest_index = outbound_syms_index;
7966 symstrtab[idx].destshndx_index = outbound_shndx_index;
7968 outbound_syms_index++;
7969 if (outbound_shndx != NULL)
7970 outbound_shndx_index++;
7973 /* Finalize the .strtab section. */
7974 _bfd_elf_strtab_finalize (stt);
7976 /* Swap out the .strtab section. */
7977 for (idx = 0; idx <= symcount; idx++)
7979 struct elf_sym_strtab *elfsym = &symstrtab[idx];
7980 if (elfsym->sym.st_name == (unsigned long) -1)
7981 elfsym->sym.st_name = 0;
7983 elfsym->sym.st_name = _bfd_elf_strtab_offset (stt,
7984 elfsym->sym.st_name);
7985 bed->s->swap_symbol_out (abfd, &elfsym->sym,
7987 + (elfsym->dest_index
7988 * bed->s->sizeof_sym)),
7990 + (elfsym->destshndx_index
7991 * sizeof (Elf_External_Sym_Shndx))));
7996 symstrtab_hdr->sh_size = _bfd_elf_strtab_size (stt);
7997 symstrtab_hdr->sh_type = SHT_STRTAB;
7998 symstrtab_hdr->sh_flags = bed->elf_strtab_flags;
7999 symstrtab_hdr->sh_addr = 0;
8000 symstrtab_hdr->sh_entsize = 0;
8001 symstrtab_hdr->sh_link = 0;
8002 symstrtab_hdr->sh_info = 0;
8003 symstrtab_hdr->sh_addralign = 1;
8008 /* Return the number of bytes required to hold the symtab vector.
8010 Note that we base it on the count plus 1, since we will null terminate
8011 the vector allocated based on this size. However, the ELF symbol table
8012 always has a dummy entry as symbol #0, so it ends up even. */
8015 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
8019 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
8021 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
8022 symtab_size = (symcount + 1) * (sizeof (asymbol *));
8024 symtab_size -= sizeof (asymbol *);
8030 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
8034 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
8036 if (elf_dynsymtab (abfd) == 0)
8038 bfd_set_error (bfd_error_invalid_operation);
8042 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
8043 symtab_size = (symcount + 1) * (sizeof (asymbol *));
8045 symtab_size -= sizeof (asymbol *);
8051 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
8054 return (asect->reloc_count + 1) * sizeof (arelent *);
8057 /* Canonicalize the relocs. */
8060 _bfd_elf_canonicalize_reloc (bfd *abfd,
8067 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8069 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
8072 tblptr = section->relocation;
8073 for (i = 0; i < section->reloc_count; i++)
8074 *relptr++ = tblptr++;
8078 return section->reloc_count;
8082 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
8084 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8085 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
8088 bfd_get_symcount (abfd) = symcount;
8093 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
8094 asymbol **allocation)
8096 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8097 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
8100 bfd_get_dynamic_symcount (abfd) = symcount;
8104 /* Return the size required for the dynamic reloc entries. Any loadable
8105 section that was actually installed in the BFD, and has type SHT_REL
8106 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
8107 dynamic reloc section. */
8110 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
8115 if (elf_dynsymtab (abfd) == 0)
8117 bfd_set_error (bfd_error_invalid_operation);
8121 ret = sizeof (arelent *);
8122 for (s = abfd->sections; s != NULL; s = s->next)
8123 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
8124 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
8125 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
8126 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
8127 * sizeof (arelent *));
8132 /* Canonicalize the dynamic relocation entries. Note that we return the
8133 dynamic relocations as a single block, although they are actually
8134 associated with particular sections; the interface, which was
8135 designed for SunOS style shared libraries, expects that there is only
8136 one set of dynamic relocs. Any loadable section that was actually
8137 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
8138 dynamic symbol table, is considered to be a dynamic reloc section. */
8141 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
8145 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8149 if (elf_dynsymtab (abfd) == 0)
8151 bfd_set_error (bfd_error_invalid_operation);
8155 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8157 for (s = abfd->sections; s != NULL; s = s->next)
8159 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
8160 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
8161 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
8166 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
8168 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
8170 for (i = 0; i < count; i++)
8181 /* Read in the version information. */
8184 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
8186 bfd_byte *contents = NULL;
8187 unsigned int freeidx = 0;
8189 if (elf_dynverref (abfd) != 0)
8191 Elf_Internal_Shdr *hdr;
8192 Elf_External_Verneed *everneed;
8193 Elf_Internal_Verneed *iverneed;
8195 bfd_byte *contents_end;
8197 hdr = &elf_tdata (abfd)->dynverref_hdr;
8199 if (hdr->sh_info == 0 || hdr->sh_size < sizeof (Elf_External_Verneed))
8201 error_return_bad_verref:
8203 (_("%B: .gnu.version_r invalid entry"), abfd);
8204 bfd_set_error (bfd_error_bad_value);
8205 error_return_verref:
8206 elf_tdata (abfd)->verref = NULL;
8207 elf_tdata (abfd)->cverrefs = 0;
8211 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
8212 if (contents == NULL)
8213 goto error_return_verref;
8215 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
8216 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
8217 goto error_return_verref;
8219 elf_tdata (abfd)->verref = (Elf_Internal_Verneed *)
8220 bfd_zalloc2 (abfd, hdr->sh_info, sizeof (Elf_Internal_Verneed));
8222 if (elf_tdata (abfd)->verref == NULL)
8223 goto error_return_verref;
8225 BFD_ASSERT (sizeof (Elf_External_Verneed)
8226 == sizeof (Elf_External_Vernaux));
8227 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
8228 everneed = (Elf_External_Verneed *) contents;
8229 iverneed = elf_tdata (abfd)->verref;
8230 for (i = 0; i < hdr->sh_info; i++, iverneed++)
8232 Elf_External_Vernaux *evernaux;
8233 Elf_Internal_Vernaux *ivernaux;
8236 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
8238 iverneed->vn_bfd = abfd;
8240 iverneed->vn_filename =
8241 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8243 if (iverneed->vn_filename == NULL)
8244 goto error_return_bad_verref;
8246 if (iverneed->vn_cnt == 0)
8247 iverneed->vn_auxptr = NULL;
8250 iverneed->vn_auxptr = (struct elf_internal_vernaux *)
8251 bfd_alloc2 (abfd, iverneed->vn_cnt,
8252 sizeof (Elf_Internal_Vernaux));
8253 if (iverneed->vn_auxptr == NULL)
8254 goto error_return_verref;
8257 if (iverneed->vn_aux
8258 > (size_t) (contents_end - (bfd_byte *) everneed))
8259 goto error_return_bad_verref;
8261 evernaux = ((Elf_External_Vernaux *)
8262 ((bfd_byte *) everneed + iverneed->vn_aux));
8263 ivernaux = iverneed->vn_auxptr;
8264 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
8266 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
8268 ivernaux->vna_nodename =
8269 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8270 ivernaux->vna_name);
8271 if (ivernaux->vna_nodename == NULL)
8272 goto error_return_bad_verref;
8274 if (ivernaux->vna_other > freeidx)
8275 freeidx = ivernaux->vna_other;
8277 ivernaux->vna_nextptr = NULL;
8278 if (ivernaux->vna_next == 0)
8280 iverneed->vn_cnt = j + 1;
8283 if (j + 1 < iverneed->vn_cnt)
8284 ivernaux->vna_nextptr = ivernaux + 1;
8286 if (ivernaux->vna_next
8287 > (size_t) (contents_end - (bfd_byte *) evernaux))
8288 goto error_return_bad_verref;
8290 evernaux = ((Elf_External_Vernaux *)
8291 ((bfd_byte *) evernaux + ivernaux->vna_next));
8294 iverneed->vn_nextref = NULL;
8295 if (iverneed->vn_next == 0)
8297 if (i + 1 < hdr->sh_info)
8298 iverneed->vn_nextref = iverneed + 1;
8300 if (iverneed->vn_next
8301 > (size_t) (contents_end - (bfd_byte *) everneed))
8302 goto error_return_bad_verref;
8304 everneed = ((Elf_External_Verneed *)
8305 ((bfd_byte *) everneed + iverneed->vn_next));
8307 elf_tdata (abfd)->cverrefs = i;
8313 if (elf_dynverdef (abfd) != 0)
8315 Elf_Internal_Shdr *hdr;
8316 Elf_External_Verdef *everdef;
8317 Elf_Internal_Verdef *iverdef;
8318 Elf_Internal_Verdef *iverdefarr;
8319 Elf_Internal_Verdef iverdefmem;
8321 unsigned int maxidx;
8322 bfd_byte *contents_end_def, *contents_end_aux;
8324 hdr = &elf_tdata (abfd)->dynverdef_hdr;
8326 if (hdr->sh_info == 0 || hdr->sh_size < sizeof (Elf_External_Verdef))
8328 error_return_bad_verdef:
8330 (_("%B: .gnu.version_d invalid entry"), abfd);
8331 bfd_set_error (bfd_error_bad_value);
8332 error_return_verdef:
8333 elf_tdata (abfd)->verdef = NULL;
8334 elf_tdata (abfd)->cverdefs = 0;
8338 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
8339 if (contents == NULL)
8340 goto error_return_verdef;
8341 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
8342 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
8343 goto error_return_verdef;
8345 BFD_ASSERT (sizeof (Elf_External_Verdef)
8346 >= sizeof (Elf_External_Verdaux));
8347 contents_end_def = contents + hdr->sh_size
8348 - sizeof (Elf_External_Verdef);
8349 contents_end_aux = contents + hdr->sh_size
8350 - sizeof (Elf_External_Verdaux);
8352 /* We know the number of entries in the section but not the maximum
8353 index. Therefore we have to run through all entries and find
8355 everdef = (Elf_External_Verdef *) contents;
8357 for (i = 0; i < hdr->sh_info; ++i)
8359 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
8361 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) == 0)
8362 goto error_return_bad_verdef;
8363 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
8364 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
8366 if (iverdefmem.vd_next == 0)
8369 if (iverdefmem.vd_next
8370 > (size_t) (contents_end_def - (bfd_byte *) everdef))
8371 goto error_return_bad_verdef;
8373 everdef = ((Elf_External_Verdef *)
8374 ((bfd_byte *) everdef + iverdefmem.vd_next));
8377 if (default_imported_symver)
8379 if (freeidx > maxidx)
8385 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
8386 bfd_zalloc2 (abfd, maxidx, sizeof (Elf_Internal_Verdef));
8387 if (elf_tdata (abfd)->verdef == NULL)
8388 goto error_return_verdef;
8390 elf_tdata (abfd)->cverdefs = maxidx;
8392 everdef = (Elf_External_Verdef *) contents;
8393 iverdefarr = elf_tdata (abfd)->verdef;
8394 for (i = 0; i < hdr->sh_info; i++)
8396 Elf_External_Verdaux *everdaux;
8397 Elf_Internal_Verdaux *iverdaux;
8400 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
8402 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
8403 goto error_return_bad_verdef;
8405 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
8406 memcpy (iverdef, &iverdefmem, offsetof (Elf_Internal_Verdef, vd_bfd));
8408 iverdef->vd_bfd = abfd;
8410 if (iverdef->vd_cnt == 0)
8411 iverdef->vd_auxptr = NULL;
8414 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
8415 bfd_alloc2 (abfd, iverdef->vd_cnt,
8416 sizeof (Elf_Internal_Verdaux));
8417 if (iverdef->vd_auxptr == NULL)
8418 goto error_return_verdef;
8422 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
8423 goto error_return_bad_verdef;
8425 everdaux = ((Elf_External_Verdaux *)
8426 ((bfd_byte *) everdef + iverdef->vd_aux));
8427 iverdaux = iverdef->vd_auxptr;
8428 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
8430 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
8432 iverdaux->vda_nodename =
8433 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8434 iverdaux->vda_name);
8435 if (iverdaux->vda_nodename == NULL)
8436 goto error_return_bad_verdef;
8438 iverdaux->vda_nextptr = NULL;
8439 if (iverdaux->vda_next == 0)
8441 iverdef->vd_cnt = j + 1;
8444 if (j + 1 < iverdef->vd_cnt)
8445 iverdaux->vda_nextptr = iverdaux + 1;
8447 if (iverdaux->vda_next
8448 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
8449 goto error_return_bad_verdef;
8451 everdaux = ((Elf_External_Verdaux *)
8452 ((bfd_byte *) everdaux + iverdaux->vda_next));
8455 iverdef->vd_nodename = NULL;
8456 if (iverdef->vd_cnt)
8457 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
8459 iverdef->vd_nextdef = NULL;
8460 if (iverdef->vd_next == 0)
8462 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
8463 iverdef->vd_nextdef = iverdef + 1;
8465 everdef = ((Elf_External_Verdef *)
8466 ((bfd_byte *) everdef + iverdef->vd_next));
8472 else if (default_imported_symver)
8479 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
8480 bfd_zalloc2 (abfd, freeidx, sizeof (Elf_Internal_Verdef));
8481 if (elf_tdata (abfd)->verdef == NULL)
8484 elf_tdata (abfd)->cverdefs = freeidx;
8487 /* Create a default version based on the soname. */
8488 if (default_imported_symver)
8490 Elf_Internal_Verdef *iverdef;
8491 Elf_Internal_Verdaux *iverdaux;
8493 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];
8495 iverdef->vd_version = VER_DEF_CURRENT;
8496 iverdef->vd_flags = 0;
8497 iverdef->vd_ndx = freeidx;
8498 iverdef->vd_cnt = 1;
8500 iverdef->vd_bfd = abfd;
8502 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
8503 if (iverdef->vd_nodename == NULL)
8504 goto error_return_verdef;
8505 iverdef->vd_nextdef = NULL;
8506 iverdef->vd_auxptr = ((struct elf_internal_verdaux *)
8507 bfd_zalloc (abfd, sizeof (Elf_Internal_Verdaux)));
8508 if (iverdef->vd_auxptr == NULL)
8509 goto error_return_verdef;
8511 iverdaux = iverdef->vd_auxptr;
8512 iverdaux->vda_nodename = iverdef->vd_nodename;
8518 if (contents != NULL)
8524 _bfd_elf_make_empty_symbol (bfd *abfd)
8526 elf_symbol_type *newsym;
8528 newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof * newsym);
8531 newsym->symbol.the_bfd = abfd;
8532 return &newsym->symbol;
8536 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
8540 bfd_symbol_info (symbol, ret);
8543 /* Return whether a symbol name implies a local symbol. Most targets
8544 use this function for the is_local_label_name entry point, but some
8548 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
8551 /* Normal local symbols start with ``.L''. */
8552 if (name[0] == '.' && name[1] == 'L')
8555 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
8556 DWARF debugging symbols starting with ``..''. */
8557 if (name[0] == '.' && name[1] == '.')
8560 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
8561 emitting DWARF debugging output. I suspect this is actually a
8562 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
8563 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
8564 underscore to be emitted on some ELF targets). For ease of use,
8565 we treat such symbols as local. */
8566 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
8569 /* Treat assembler generated fake symbols, dollar local labels and
8570 forward-backward labels (aka local labels) as locals.
8571 These labels have the form:
8573 L0^A.* (fake symbols)
8575 [.]?L[0123456789]+{^A|^B}[0123456789]* (local labels)
8577 Versions which start with .L will have already been matched above,
8578 so we only need to match the rest. */
8579 if (name[0] == 'L' && ISDIGIT (name[1]))
8581 bfd_boolean ret = FALSE;
8585 for (p = name + 2; (c = *p); p++)
8587 if (c == 1 || c == 2)
8589 if (c == 1 && p == name + 2)
8590 /* A fake symbol. */
8593 /* FIXME: We are being paranoid here and treating symbols like
8594 L0^Bfoo as if there were non-local, on the grounds that the
8595 assembler will never generate them. But can any symbol
8596 containing an ASCII value in the range 1-31 ever be anything
8597 other than some kind of local ? */
8614 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
8615 asymbol *symbol ATTRIBUTE_UNUSED)
8622 _bfd_elf_set_arch_mach (bfd *abfd,
8623 enum bfd_architecture arch,
8624 unsigned long machine)
8626 /* If this isn't the right architecture for this backend, and this
8627 isn't the generic backend, fail. */
8628 if (arch != get_elf_backend_data (abfd)->arch
8629 && arch != bfd_arch_unknown
8630 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
8633 return bfd_default_set_arch_mach (abfd, arch, machine);
8636 /* Find the nearest line to a particular section and offset,
8637 for error reporting. */
8640 _bfd_elf_find_nearest_line (bfd *abfd,
8644 const char **filename_ptr,
8645 const char **functionname_ptr,
8646 unsigned int *line_ptr,
8647 unsigned int *discriminator_ptr)
8651 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
8652 filename_ptr, functionname_ptr,
8653 line_ptr, discriminator_ptr,
8654 dwarf_debug_sections, 0,
8655 &elf_tdata (abfd)->dwarf2_find_line_info)
8656 || _bfd_dwarf1_find_nearest_line (abfd, symbols, section, offset,
8657 filename_ptr, functionname_ptr,
8660 if (!*functionname_ptr)
8661 _bfd_elf_find_function (abfd, symbols, section, offset,
8662 *filename_ptr ? NULL : filename_ptr,
8667 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
8668 &found, filename_ptr,
8669 functionname_ptr, line_ptr,
8670 &elf_tdata (abfd)->line_info))
8672 if (found && (*functionname_ptr || *line_ptr))
8675 if (symbols == NULL)
8678 if (! _bfd_elf_find_function (abfd, symbols, section, offset,
8679 filename_ptr, functionname_ptr))
8686 /* Find the line for a symbol. */
8689 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
8690 const char **filename_ptr, unsigned int *line_ptr)
8692 return _bfd_dwarf2_find_nearest_line (abfd, symbols, symbol, NULL, 0,
8693 filename_ptr, NULL, line_ptr, NULL,
8694 dwarf_debug_sections, 0,
8695 &elf_tdata (abfd)->dwarf2_find_line_info);
8698 /* After a call to bfd_find_nearest_line, successive calls to
8699 bfd_find_inliner_info can be used to get source information about
8700 each level of function inlining that terminated at the address
8701 passed to bfd_find_nearest_line. Currently this is only supported
8702 for DWARF2 with appropriate DWARF3 extensions. */
8705 _bfd_elf_find_inliner_info (bfd *abfd,
8706 const char **filename_ptr,
8707 const char **functionname_ptr,
8708 unsigned int *line_ptr)
8711 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
8712 functionname_ptr, line_ptr,
8713 & elf_tdata (abfd)->dwarf2_find_line_info);
8718 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
8720 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8721 int ret = bed->s->sizeof_ehdr;
8723 if (!bfd_link_relocatable (info))
8725 bfd_size_type phdr_size = elf_program_header_size (abfd);
8727 if (phdr_size == (bfd_size_type) -1)
8729 struct elf_segment_map *m;
8732 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
8733 phdr_size += bed->s->sizeof_phdr;
8736 phdr_size = get_program_header_size (abfd, info);
8739 elf_program_header_size (abfd) = phdr_size;
8747 _bfd_elf_set_section_contents (bfd *abfd,
8749 const void *location,
8751 bfd_size_type count)
8753 Elf_Internal_Shdr *hdr;
8756 if (! abfd->output_has_begun
8757 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
8763 hdr = &elf_section_data (section)->this_hdr;
8764 if (hdr->sh_offset == (file_ptr) -1)
8766 /* We must compress this section. Write output to the buffer. */
8767 unsigned char *contents = hdr->contents;
8768 if ((offset + count) > hdr->sh_size
8769 || (section->flags & SEC_ELF_COMPRESS) == 0
8770 || contents == NULL)
8772 memcpy (contents + offset, location, count);
8775 pos = hdr->sh_offset + offset;
8776 if (bfd_seek (abfd, pos, SEEK_SET) != 0
8777 || bfd_bwrite (location, count, abfd) != count)
8784 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
8785 arelent *cache_ptr ATTRIBUTE_UNUSED,
8786 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
8791 /* Try to convert a non-ELF reloc into an ELF one. */
8794 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
8796 /* Check whether we really have an ELF howto. */
8798 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
8800 bfd_reloc_code_real_type code;
8801 reloc_howto_type *howto;
8803 /* Alien reloc: Try to determine its type to replace it with an
8804 equivalent ELF reloc. */
8806 if (areloc->howto->pc_relative)
8808 switch (areloc->howto->bitsize)
8811 code = BFD_RELOC_8_PCREL;
8814 code = BFD_RELOC_12_PCREL;
8817 code = BFD_RELOC_16_PCREL;
8820 code = BFD_RELOC_24_PCREL;
8823 code = BFD_RELOC_32_PCREL;
8826 code = BFD_RELOC_64_PCREL;
8832 howto = bfd_reloc_type_lookup (abfd, code);
8834 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
8836 if (howto->pcrel_offset)
8837 areloc->addend += areloc->address;
8839 areloc->addend -= areloc->address; /* addend is unsigned!! */
8844 switch (areloc->howto->bitsize)
8850 code = BFD_RELOC_14;
8853 code = BFD_RELOC_16;
8856 code = BFD_RELOC_26;
8859 code = BFD_RELOC_32;
8862 code = BFD_RELOC_64;
8868 howto = bfd_reloc_type_lookup (abfd, code);
8872 areloc->howto = howto;
8881 /* xgettext:c-format */
8882 (_("%B: unsupported relocation type %s"),
8883 abfd, areloc->howto->name);
8884 bfd_set_error (bfd_error_bad_value);
8889 _bfd_elf_close_and_cleanup (bfd *abfd)
8891 struct elf_obj_tdata *tdata = elf_tdata (abfd);
8892 if (bfd_get_format (abfd) == bfd_object && tdata != NULL)
8894 if (elf_tdata (abfd)->o != NULL && elf_shstrtab (abfd) != NULL)
8895 _bfd_elf_strtab_free (elf_shstrtab (abfd));
8896 _bfd_dwarf2_cleanup_debug_info (abfd, &tdata->dwarf2_find_line_info);
8899 return _bfd_generic_close_and_cleanup (abfd);
8902 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
8903 in the relocation's offset. Thus we cannot allow any sort of sanity
8904 range-checking to interfere. There is nothing else to do in processing
8907 bfd_reloc_status_type
8908 _bfd_elf_rel_vtable_reloc_fn
8909 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
8910 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
8911 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
8912 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
8914 return bfd_reloc_ok;
8917 /* Elf core file support. Much of this only works on native
8918 toolchains, since we rely on knowing the
8919 machine-dependent procfs structure in order to pick
8920 out details about the corefile. */
8922 #ifdef HAVE_SYS_PROCFS_H
8923 /* Needed for new procfs interface on sparc-solaris. */
8924 # define _STRUCTURED_PROC 1
8925 # include <sys/procfs.h>
8928 /* Return a PID that identifies a "thread" for threaded cores, or the
8929 PID of the main process for non-threaded cores. */
8932 elfcore_make_pid (bfd *abfd)
8936 pid = elf_tdata (abfd)->core->lwpid;
8938 pid = elf_tdata (abfd)->core->pid;
8943 /* If there isn't a section called NAME, make one, using
8944 data from SECT. Note, this function will generate a
8945 reference to NAME, so you shouldn't deallocate or
8949 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
8953 if (bfd_get_section_by_name (abfd, name) != NULL)
8956 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
8960 sect2->size = sect->size;
8961 sect2->filepos = sect->filepos;
8962 sect2->alignment_power = sect->alignment_power;
8966 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
8967 actually creates up to two pseudosections:
8968 - For the single-threaded case, a section named NAME, unless
8969 such a section already exists.
8970 - For the multi-threaded case, a section named "NAME/PID", where
8971 PID is elfcore_make_pid (abfd).
8972 Both pseudosections have identical contents. */
8974 _bfd_elfcore_make_pseudosection (bfd *abfd,
8980 char *threaded_name;
8984 /* Build the section name. */
8986 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
8987 len = strlen (buf) + 1;
8988 threaded_name = (char *) bfd_alloc (abfd, len);
8989 if (threaded_name == NULL)
8991 memcpy (threaded_name, buf, len);
8993 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
8998 sect->filepos = filepos;
8999 sect->alignment_power = 2;
9001 return elfcore_maybe_make_sect (abfd, name, sect);
9004 /* prstatus_t exists on:
9006 linux 2.[01] + glibc
9010 #if defined (HAVE_PRSTATUS_T)
9013 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
9018 if (note->descsz == sizeof (prstatus_t))
9022 size = sizeof (prstat.pr_reg);
9023 offset = offsetof (prstatus_t, pr_reg);
9024 memcpy (&prstat, note->descdata, sizeof (prstat));
9026 /* Do not overwrite the core signal if it
9027 has already been set by another thread. */
9028 if (elf_tdata (abfd)->core->signal == 0)
9029 elf_tdata (abfd)->core->signal = prstat.pr_cursig;
9030 if (elf_tdata (abfd)->core->pid == 0)
9031 elf_tdata (abfd)->core->pid = prstat.pr_pid;
9033 /* pr_who exists on:
9036 pr_who doesn't exist on:
9039 #if defined (HAVE_PRSTATUS_T_PR_WHO)
9040 elf_tdata (abfd)->core->lwpid = prstat.pr_who;
9042 elf_tdata (abfd)->core->lwpid = prstat.pr_pid;
9045 #if defined (HAVE_PRSTATUS32_T)
9046 else if (note->descsz == sizeof (prstatus32_t))
9048 /* 64-bit host, 32-bit corefile */
9049 prstatus32_t prstat;
9051 size = sizeof (prstat.pr_reg);
9052 offset = offsetof (prstatus32_t, pr_reg);
9053 memcpy (&prstat, note->descdata, sizeof (prstat));
9055 /* Do not overwrite the core signal if it
9056 has already been set by another thread. */
9057 if (elf_tdata (abfd)->core->signal == 0)
9058 elf_tdata (abfd)->core->signal = prstat.pr_cursig;
9059 if (elf_tdata (abfd)->core->pid == 0)
9060 elf_tdata (abfd)->core->pid = prstat.pr_pid;
9062 /* pr_who exists on:
9065 pr_who doesn't exist on:
9068 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
9069 elf_tdata (abfd)->core->lwpid = prstat.pr_who;
9071 elf_tdata (abfd)->core->lwpid = prstat.pr_pid;
9074 #endif /* HAVE_PRSTATUS32_T */
9077 /* Fail - we don't know how to handle any other
9078 note size (ie. data object type). */
9082 /* Make a ".reg/999" section and a ".reg" section. */
9083 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
9084 size, note->descpos + offset);
9086 #endif /* defined (HAVE_PRSTATUS_T) */
9088 /* Create a pseudosection containing the exact contents of NOTE. */
9090 elfcore_make_note_pseudosection (bfd *abfd,
9092 Elf_Internal_Note *note)
9094 return _bfd_elfcore_make_pseudosection (abfd, name,
9095 note->descsz, note->descpos);
9098 /* There isn't a consistent prfpregset_t across platforms,
9099 but it doesn't matter, because we don't have to pick this
9100 data structure apart. */
9103 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
9105 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
9108 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
9109 type of NT_PRXFPREG. Just include the whole note's contents
9113 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
9115 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
9118 /* Linux dumps the Intel XSAVE extended state in a note named "LINUX"
9119 with a note type of NT_X86_XSTATE. Just include the whole note's
9120 contents literally. */
9123 elfcore_grok_xstatereg (bfd *abfd, Elf_Internal_Note *note)
9125 return elfcore_make_note_pseudosection (abfd, ".reg-xstate", note);
9129 elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note)
9131 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note);
9135 elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note)
9137 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note);
9141 elfcore_grok_s390_high_gprs (bfd *abfd, Elf_Internal_Note *note)
9143 return elfcore_make_note_pseudosection (abfd, ".reg-s390-high-gprs", note);
9147 elfcore_grok_s390_timer (bfd *abfd, Elf_Internal_Note *note)
9149 return elfcore_make_note_pseudosection (abfd, ".reg-s390-timer", note);
9153 elfcore_grok_s390_todcmp (bfd *abfd, Elf_Internal_Note *note)
9155 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todcmp", note);
9159 elfcore_grok_s390_todpreg (bfd *abfd, Elf_Internal_Note *note)
9161 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todpreg", note);
9165 elfcore_grok_s390_ctrs (bfd *abfd, Elf_Internal_Note *note)
9167 return elfcore_make_note_pseudosection (abfd, ".reg-s390-ctrs", note);
9171 elfcore_grok_s390_prefix (bfd *abfd, Elf_Internal_Note *note)
9173 return elfcore_make_note_pseudosection (abfd, ".reg-s390-prefix", note);
9177 elfcore_grok_s390_last_break (bfd *abfd, Elf_Internal_Note *note)
9179 return elfcore_make_note_pseudosection (abfd, ".reg-s390-last-break", note);
9183 elfcore_grok_s390_system_call (bfd *abfd, Elf_Internal_Note *note)
9185 return elfcore_make_note_pseudosection (abfd, ".reg-s390-system-call", note);
9189 elfcore_grok_s390_tdb (bfd *abfd, Elf_Internal_Note *note)
9191 return elfcore_make_note_pseudosection (abfd, ".reg-s390-tdb", note);
9195 elfcore_grok_s390_vxrs_low (bfd *abfd, Elf_Internal_Note *note)
9197 return elfcore_make_note_pseudosection (abfd, ".reg-s390-vxrs-low", note);
9201 elfcore_grok_s390_vxrs_high (bfd *abfd, Elf_Internal_Note *note)
9203 return elfcore_make_note_pseudosection (abfd, ".reg-s390-vxrs-high", note);
9207 elfcore_grok_arm_vfp (bfd *abfd, Elf_Internal_Note *note)
9209 return elfcore_make_note_pseudosection (abfd, ".reg-arm-vfp", note);
9213 elfcore_grok_aarch_tls (bfd *abfd, Elf_Internal_Note *note)
9215 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-tls", note);
9219 elfcore_grok_aarch_hw_break (bfd *abfd, Elf_Internal_Note *note)
9221 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-break", note);
9225 elfcore_grok_aarch_hw_watch (bfd *abfd, Elf_Internal_Note *note)
9227 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-watch", note);
9230 #if defined (HAVE_PRPSINFO_T)
9231 typedef prpsinfo_t elfcore_psinfo_t;
9232 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
9233 typedef prpsinfo32_t elfcore_psinfo32_t;
9237 #if defined (HAVE_PSINFO_T)
9238 typedef psinfo_t elfcore_psinfo_t;
9239 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
9240 typedef psinfo32_t elfcore_psinfo32_t;
9244 /* return a malloc'ed copy of a string at START which is at
9245 most MAX bytes long, possibly without a terminating '\0'.
9246 the copy will always have a terminating '\0'. */
9249 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
9252 char *end = (char *) memchr (start, '\0', max);
9260 dups = (char *) bfd_alloc (abfd, len + 1);
9264 memcpy (dups, start, len);
9270 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
9272 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
9274 if (note->descsz == sizeof (elfcore_psinfo_t))
9276 elfcore_psinfo_t psinfo;
9278 memcpy (&psinfo, note->descdata, sizeof (psinfo));
9280 #if defined (HAVE_PSINFO_T_PR_PID) || defined (HAVE_PRPSINFO_T_PR_PID)
9281 elf_tdata (abfd)->core->pid = psinfo.pr_pid;
9283 elf_tdata (abfd)->core->program
9284 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
9285 sizeof (psinfo.pr_fname));
9287 elf_tdata (abfd)->core->command
9288 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
9289 sizeof (psinfo.pr_psargs));
9291 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
9292 else if (note->descsz == sizeof (elfcore_psinfo32_t))
9294 /* 64-bit host, 32-bit corefile */
9295 elfcore_psinfo32_t psinfo;
9297 memcpy (&psinfo, note->descdata, sizeof (psinfo));
9299 #if defined (HAVE_PSINFO32_T_PR_PID) || defined (HAVE_PRPSINFO32_T_PR_PID)
9300 elf_tdata (abfd)->core->pid = psinfo.pr_pid;
9302 elf_tdata (abfd)->core->program
9303 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
9304 sizeof (psinfo.pr_fname));
9306 elf_tdata (abfd)->core->command
9307 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
9308 sizeof (psinfo.pr_psargs));
9314 /* Fail - we don't know how to handle any other
9315 note size (ie. data object type). */
9319 /* Note that for some reason, a spurious space is tacked
9320 onto the end of the args in some (at least one anyway)
9321 implementations, so strip it off if it exists. */
9324 char *command = elf_tdata (abfd)->core->command;
9325 int n = strlen (command);
9327 if (0 < n && command[n - 1] == ' ')
9328 command[n - 1] = '\0';
9333 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
9335 #if defined (HAVE_PSTATUS_T)
9337 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
9339 if (note->descsz == sizeof (pstatus_t)
9340 #if defined (HAVE_PXSTATUS_T)
9341 || note->descsz == sizeof (pxstatus_t)
9347 memcpy (&pstat, note->descdata, sizeof (pstat));
9349 elf_tdata (abfd)->core->pid = pstat.pr_pid;
9351 #if defined (HAVE_PSTATUS32_T)
9352 else if (note->descsz == sizeof (pstatus32_t))
9354 /* 64-bit host, 32-bit corefile */
9357 memcpy (&pstat, note->descdata, sizeof (pstat));
9359 elf_tdata (abfd)->core->pid = pstat.pr_pid;
9362 /* Could grab some more details from the "representative"
9363 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
9364 NT_LWPSTATUS note, presumably. */
9368 #endif /* defined (HAVE_PSTATUS_T) */
9370 #if defined (HAVE_LWPSTATUS_T)
9372 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
9374 lwpstatus_t lwpstat;
9380 if (note->descsz != sizeof (lwpstat)
9381 #if defined (HAVE_LWPXSTATUS_T)
9382 && note->descsz != sizeof (lwpxstatus_t)
9387 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
9389 elf_tdata (abfd)->core->lwpid = lwpstat.pr_lwpid;
9390 /* Do not overwrite the core signal if it has already been set by
9392 if (elf_tdata (abfd)->core->signal == 0)
9393 elf_tdata (abfd)->core->signal = lwpstat.pr_cursig;
9395 /* Make a ".reg/999" section. */
9397 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
9398 len = strlen (buf) + 1;
9399 name = bfd_alloc (abfd, len);
9402 memcpy (name, buf, len);
9404 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9408 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
9409 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
9410 sect->filepos = note->descpos
9411 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
9414 #if defined (HAVE_LWPSTATUS_T_PR_REG)
9415 sect->size = sizeof (lwpstat.pr_reg);
9416 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
9419 sect->alignment_power = 2;
9421 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
9424 /* Make a ".reg2/999" section */
9426 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
9427 len = strlen (buf) + 1;
9428 name = bfd_alloc (abfd, len);
9431 memcpy (name, buf, len);
9433 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9437 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
9438 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
9439 sect->filepos = note->descpos
9440 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
9443 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
9444 sect->size = sizeof (lwpstat.pr_fpreg);
9445 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
9448 sect->alignment_power = 2;
9450 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
9452 #endif /* defined (HAVE_LWPSTATUS_T) */
9455 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
9462 int is_active_thread;
9465 if (note->descsz < 728)
9468 if (! CONST_STRNEQ (note->namedata, "win32"))
9471 type = bfd_get_32 (abfd, note->descdata);
9475 case 1 /* NOTE_INFO_PROCESS */:
9476 /* FIXME: need to add ->core->command. */
9477 /* process_info.pid */
9478 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 8);
9479 /* process_info.signal */
9480 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 12);
9483 case 2 /* NOTE_INFO_THREAD */:
9484 /* Make a ".reg/999" section. */
9485 /* thread_info.tid */
9486 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
9488 len = strlen (buf) + 1;
9489 name = (char *) bfd_alloc (abfd, len);
9493 memcpy (name, buf, len);
9495 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9499 /* sizeof (thread_info.thread_context) */
9501 /* offsetof (thread_info.thread_context) */
9502 sect->filepos = note->descpos + 12;
9503 sect->alignment_power = 2;
9505 /* thread_info.is_active_thread */
9506 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
9508 if (is_active_thread)
9509 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
9513 case 3 /* NOTE_INFO_MODULE */:
9514 /* Make a ".module/xxxxxxxx" section. */
9515 /* module_info.base_address */
9516 base_addr = bfd_get_32 (abfd, note->descdata + 4);
9517 sprintf (buf, ".module/%08lx", (unsigned long) base_addr);
9519 len = strlen (buf) + 1;
9520 name = (char *) bfd_alloc (abfd, len);
9524 memcpy (name, buf, len);
9526 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9531 sect->size = note->descsz;
9532 sect->filepos = note->descpos;
9533 sect->alignment_power = 2;
9544 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
9546 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9554 if (bed->elf_backend_grok_prstatus)
9555 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
9557 #if defined (HAVE_PRSTATUS_T)
9558 return elfcore_grok_prstatus (abfd, note);
9563 #if defined (HAVE_PSTATUS_T)
9565 return elfcore_grok_pstatus (abfd, note);
9568 #if defined (HAVE_LWPSTATUS_T)
9570 return elfcore_grok_lwpstatus (abfd, note);
9573 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
9574 return elfcore_grok_prfpreg (abfd, note);
9576 case NT_WIN32PSTATUS:
9577 return elfcore_grok_win32pstatus (abfd, note);
9579 case NT_PRXFPREG: /* Linux SSE extension */
9580 if (note->namesz == 6
9581 && strcmp (note->namedata, "LINUX") == 0)
9582 return elfcore_grok_prxfpreg (abfd, note);
9586 case NT_X86_XSTATE: /* Linux XSAVE extension */
9587 if (note->namesz == 6
9588 && strcmp (note->namedata, "LINUX") == 0)
9589 return elfcore_grok_xstatereg (abfd, note);
9594 if (note->namesz == 6
9595 && strcmp (note->namedata, "LINUX") == 0)
9596 return elfcore_grok_ppc_vmx (abfd, note);
9601 if (note->namesz == 6
9602 && strcmp (note->namedata, "LINUX") == 0)
9603 return elfcore_grok_ppc_vsx (abfd, note);
9607 case NT_S390_HIGH_GPRS:
9608 if (note->namesz == 6
9609 && strcmp (note->namedata, "LINUX") == 0)
9610 return elfcore_grok_s390_high_gprs (abfd, note);
9615 if (note->namesz == 6
9616 && strcmp (note->namedata, "LINUX") == 0)
9617 return elfcore_grok_s390_timer (abfd, note);
9621 case NT_S390_TODCMP:
9622 if (note->namesz == 6
9623 && strcmp (note->namedata, "LINUX") == 0)
9624 return elfcore_grok_s390_todcmp (abfd, note);
9628 case NT_S390_TODPREG:
9629 if (note->namesz == 6
9630 && strcmp (note->namedata, "LINUX") == 0)
9631 return elfcore_grok_s390_todpreg (abfd, note);
9636 if (note->namesz == 6
9637 && strcmp (note->namedata, "LINUX") == 0)
9638 return elfcore_grok_s390_ctrs (abfd, note);
9642 case NT_S390_PREFIX:
9643 if (note->namesz == 6
9644 && strcmp (note->namedata, "LINUX") == 0)
9645 return elfcore_grok_s390_prefix (abfd, note);
9649 case NT_S390_LAST_BREAK:
9650 if (note->namesz == 6
9651 && strcmp (note->namedata, "LINUX") == 0)
9652 return elfcore_grok_s390_last_break (abfd, note);
9656 case NT_S390_SYSTEM_CALL:
9657 if (note->namesz == 6
9658 && strcmp (note->namedata, "LINUX") == 0)
9659 return elfcore_grok_s390_system_call (abfd, note);
9664 if (note->namesz == 6
9665 && strcmp (note->namedata, "LINUX") == 0)
9666 return elfcore_grok_s390_tdb (abfd, note);
9670 case NT_S390_VXRS_LOW:
9671 if (note->namesz == 6
9672 && strcmp (note->namedata, "LINUX") == 0)
9673 return elfcore_grok_s390_vxrs_low (abfd, note);
9677 case NT_S390_VXRS_HIGH:
9678 if (note->namesz == 6
9679 && strcmp (note->namedata, "LINUX") == 0)
9680 return elfcore_grok_s390_vxrs_high (abfd, note);
9685 if (note->namesz == 6
9686 && strcmp (note->namedata, "LINUX") == 0)
9687 return elfcore_grok_arm_vfp (abfd, note);
9692 if (note->namesz == 6
9693 && strcmp (note->namedata, "LINUX") == 0)
9694 return elfcore_grok_aarch_tls (abfd, note);
9698 case NT_ARM_HW_BREAK:
9699 if (note->namesz == 6
9700 && strcmp (note->namedata, "LINUX") == 0)
9701 return elfcore_grok_aarch_hw_break (abfd, note);
9705 case NT_ARM_HW_WATCH:
9706 if (note->namesz == 6
9707 && strcmp (note->namedata, "LINUX") == 0)
9708 return elfcore_grok_aarch_hw_watch (abfd, note);
9714 if (bed->elf_backend_grok_psinfo)
9715 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
9717 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
9718 return elfcore_grok_psinfo (abfd, note);
9725 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
9730 sect->size = note->descsz;
9731 sect->filepos = note->descpos;
9732 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
9738 return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.file",
9742 return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.siginfo",
9749 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
9751 struct bfd_build_id* build_id;
9753 if (note->descsz == 0)
9756 build_id = bfd_alloc (abfd, sizeof (struct bfd_build_id) - 1 + note->descsz);
9757 if (build_id == NULL)
9760 build_id->size = note->descsz;
9761 memcpy (build_id->data, note->descdata, note->descsz);
9762 abfd->build_id = build_id;
9768 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
9775 case NT_GNU_PROPERTY_TYPE_0:
9776 return _bfd_elf_parse_gnu_properties (abfd, note);
9778 case NT_GNU_BUILD_ID:
9779 return elfobj_grok_gnu_build_id (abfd, note);
9784 elfobj_grok_stapsdt_note_1 (bfd *abfd, Elf_Internal_Note *note)
9786 struct sdt_note *cur =
9787 (struct sdt_note *) bfd_alloc (abfd, sizeof (struct sdt_note)
9790 cur->next = (struct sdt_note *) (elf_tdata (abfd))->sdt_note_head;
9791 cur->size = (bfd_size_type) note->descsz;
9792 memcpy (cur->data, note->descdata, note->descsz);
9794 elf_tdata (abfd)->sdt_note_head = cur;
9800 elfobj_grok_stapsdt_note (bfd *abfd, Elf_Internal_Note *note)
9805 return elfobj_grok_stapsdt_note_1 (abfd, note);
9813 elfcore_grok_freebsd_psinfo (bfd *abfd, Elf_Internal_Note *note)
9817 switch (elf_elfheader (abfd)->e_ident[EI_CLASS])
9820 if (note->descsz < 108)
9825 if (note->descsz < 120)
9833 /* Check for version 1 in pr_version. */
9834 if (bfd_h_get_32 (abfd, (bfd_byte *) note->descdata) != 1)
9838 /* Skip over pr_psinfosz. */
9839 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS32)
9843 offset += 4; /* Padding before pr_psinfosz. */
9847 /* pr_fname is PRFNAMESZ (16) + 1 bytes in size. */
9848 elf_tdata (abfd)->core->program
9849 = _bfd_elfcore_strndup (abfd, note->descdata + offset, 17);
9852 /* pr_psargs is PRARGSZ (80) + 1 bytes in size. */
9853 elf_tdata (abfd)->core->command
9854 = _bfd_elfcore_strndup (abfd, note->descdata + offset, 81);
9857 /* Padding before pr_pid. */
9860 /* The pr_pid field was added in version "1a". */
9861 if (note->descsz < offset + 4)
9864 elf_tdata (abfd)->core->pid
9865 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
9871 elfcore_grok_freebsd_prstatus (bfd *abfd, Elf_Internal_Note *note)
9876 /* Check for version 1 in pr_version. */
9877 if (bfd_h_get_32 (abfd, (bfd_byte *) note->descdata) != 1)
9881 /* Skip over pr_statussz. */
9882 switch (elf_elfheader (abfd)->e_ident[EI_CLASS])
9889 offset += 4; /* Padding before pr_statussz. */
9897 /* Extract size of pr_reg from pr_gregsetsz. */
9898 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS32)
9899 size = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
9901 size = bfd_h_get_64 (abfd, (bfd_byte *) note->descdata + offset);
9903 /* Skip over pr_gregsetsz and pr_fpregsetsz. */
9904 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS32)
9909 /* Skip over pr_osreldate. */
9912 /* Read signal from pr_cursig. */
9913 if (elf_tdata (abfd)->core->signal == 0)
9914 elf_tdata (abfd)->core->signal
9915 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
9918 /* Read TID from pr_pid. */
9919 elf_tdata (abfd)->core->lwpid
9920 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
9923 /* Padding before pr_reg. */
9924 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS64)
9927 /* Make a ".reg/999" section and a ".reg" section. */
9928 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
9929 size, note->descpos + offset);
9933 elfcore_grok_freebsd_note (bfd *abfd, Elf_Internal_Note *note)
9938 return elfcore_grok_freebsd_prstatus (abfd, note);
9941 return elfcore_grok_prfpreg (abfd, note);
9944 return elfcore_grok_freebsd_psinfo (abfd, note);
9946 case NT_FREEBSD_THRMISC:
9947 if (note->namesz == 8)
9948 return elfcore_make_note_pseudosection (abfd, ".thrmisc", note);
9952 case NT_FREEBSD_PROCSTAT_AUXV:
9954 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
9959 sect->size = note->descsz - 4;
9960 sect->filepos = note->descpos + 4;
9961 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
9967 if (note->namesz == 8)
9968 return elfcore_grok_xstatereg (abfd, note);
9978 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
9982 cp = strchr (note->namedata, '@');
9985 *lwpidp = atoi(cp + 1);
9992 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
9994 /* Signal number at offset 0x08. */
9995 elf_tdata (abfd)->core->signal
9996 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
9998 /* Process ID at offset 0x50. */
9999 elf_tdata (abfd)->core->pid
10000 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
10002 /* Command name at 0x7c (max 32 bytes, including nul). */
10003 elf_tdata (abfd)->core->command
10004 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
10006 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
10011 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
10015 if (elfcore_netbsd_get_lwpid (note, &lwp))
10016 elf_tdata (abfd)->core->lwpid = lwp;
10018 if (note->type == NT_NETBSDCORE_PROCINFO)
10020 /* NetBSD-specific core "procinfo". Note that we expect to
10021 find this note before any of the others, which is fine,
10022 since the kernel writes this note out first when it
10023 creates a core file. */
10025 return elfcore_grok_netbsd_procinfo (abfd, note);
10028 /* As of Jan 2002 there are no other machine-independent notes
10029 defined for NetBSD core files. If the note type is less
10030 than the start of the machine-dependent note types, we don't
10033 if (note->type < NT_NETBSDCORE_FIRSTMACH)
10037 switch (bfd_get_arch (abfd))
10039 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
10040 PT_GETFPREGS == mach+2. */
10042 case bfd_arch_alpha:
10043 case bfd_arch_sparc:
10044 switch (note->type)
10046 case NT_NETBSDCORE_FIRSTMACH+0:
10047 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10049 case NT_NETBSDCORE_FIRSTMACH+2:
10050 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10056 /* On all other arch's, PT_GETREGS == mach+1 and
10057 PT_GETFPREGS == mach+3. */
10060 switch (note->type)
10062 case NT_NETBSDCORE_FIRSTMACH+1:
10063 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10065 case NT_NETBSDCORE_FIRSTMACH+3:
10066 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10076 elfcore_grok_openbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
10078 /* Signal number at offset 0x08. */
10079 elf_tdata (abfd)->core->signal
10080 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
10082 /* Process ID at offset 0x20. */
10083 elf_tdata (abfd)->core->pid
10084 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x20);
10086 /* Command name at 0x48 (max 32 bytes, including nul). */
10087 elf_tdata (abfd)->core->command
10088 = _bfd_elfcore_strndup (abfd, note->descdata + 0x48, 31);
10094 elfcore_grok_openbsd_note (bfd *abfd, Elf_Internal_Note *note)
10096 if (note->type == NT_OPENBSD_PROCINFO)
10097 return elfcore_grok_openbsd_procinfo (abfd, note);
10099 if (note->type == NT_OPENBSD_REGS)
10100 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10102 if (note->type == NT_OPENBSD_FPREGS)
10103 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10105 if (note->type == NT_OPENBSD_XFPREGS)
10106 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
10108 if (note->type == NT_OPENBSD_AUXV)
10110 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
10115 sect->size = note->descsz;
10116 sect->filepos = note->descpos;
10117 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
10122 if (note->type == NT_OPENBSD_WCOOKIE)
10124 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
10129 sect->size = note->descsz;
10130 sect->filepos = note->descpos;
10131 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
10140 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
10142 void *ddata = note->descdata;
10149 /* nto_procfs_status 'pid' field is at offset 0. */
10150 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
10152 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
10153 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
10155 /* nto_procfs_status 'flags' field is at offset 8. */
10156 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
10158 /* nto_procfs_status 'what' field is at offset 14. */
10159 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
10161 elf_tdata (abfd)->core->signal = sig;
10162 elf_tdata (abfd)->core->lwpid = *tid;
10165 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
10166 do not come from signals so we make sure we set the current
10167 thread just in case. */
10168 if (flags & 0x00000080)
10169 elf_tdata (abfd)->core->lwpid = *tid;
10171 /* Make a ".qnx_core_status/%d" section. */
10172 sprintf (buf, ".qnx_core_status/%ld", *tid);
10174 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
10177 strcpy (name, buf);
10179 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10183 sect->size = note->descsz;
10184 sect->filepos = note->descpos;
10185 sect->alignment_power = 2;
10187 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
10191 elfcore_grok_nto_regs (bfd *abfd,
10192 Elf_Internal_Note *note,
10200 /* Make a "(base)/%d" section. */
10201 sprintf (buf, "%s/%ld", base, tid);
10203 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
10206 strcpy (name, buf);
10208 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10212 sect->size = note->descsz;
10213 sect->filepos = note->descpos;
10214 sect->alignment_power = 2;
10216 /* This is the current thread. */
10217 if (elf_tdata (abfd)->core->lwpid == tid)
10218 return elfcore_maybe_make_sect (abfd, base, sect);
10223 #define BFD_QNT_CORE_INFO 7
10224 #define BFD_QNT_CORE_STATUS 8
10225 #define BFD_QNT_CORE_GREG 9
10226 #define BFD_QNT_CORE_FPREG 10
10229 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
10231 /* Every GREG section has a STATUS section before it. Store the
10232 tid from the previous call to pass down to the next gregs
10234 static long tid = 1;
10236 switch (note->type)
10238 case BFD_QNT_CORE_INFO:
10239 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
10240 case BFD_QNT_CORE_STATUS:
10241 return elfcore_grok_nto_status (abfd, note, &tid);
10242 case BFD_QNT_CORE_GREG:
10243 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
10244 case BFD_QNT_CORE_FPREG:
10245 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
10252 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
10258 /* Use note name as section name. */
10259 len = note->namesz;
10260 name = (char *) bfd_alloc (abfd, len);
10263 memcpy (name, note->namedata, len);
10264 name[len - 1] = '\0';
10266 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10270 sect->size = note->descsz;
10271 sect->filepos = note->descpos;
10272 sect->alignment_power = 1;
10277 /* Function: elfcore_write_note
10280 buffer to hold note, and current size of buffer
10284 size of data for note
10286 Writes note to end of buffer. ELF64 notes are written exactly as
10287 for ELF32, despite the current (as of 2006) ELF gabi specifying
10288 that they ought to have 8-byte namesz and descsz field, and have
10289 8-byte alignment. Other writers, eg. Linux kernel, do the same.
10292 Pointer to realloc'd buffer, *BUFSIZ updated. */
10295 elfcore_write_note (bfd *abfd,
10303 Elf_External_Note *xnp;
10310 namesz = strlen (name) + 1;
10312 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
10314 buf = (char *) realloc (buf, *bufsiz + newspace);
10317 dest = buf + *bufsiz;
10318 *bufsiz += newspace;
10319 xnp = (Elf_External_Note *) dest;
10320 H_PUT_32 (abfd, namesz, xnp->namesz);
10321 H_PUT_32 (abfd, size, xnp->descsz);
10322 H_PUT_32 (abfd, type, xnp->type);
10326 memcpy (dest, name, namesz);
10334 memcpy (dest, input, size);
10345 elfcore_write_prpsinfo (bfd *abfd,
10349 const char *psargs)
10351 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10353 if (bed->elf_backend_write_core_note != NULL)
10356 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
10357 NT_PRPSINFO, fname, psargs);
10362 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
10363 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
10364 if (bed->s->elfclass == ELFCLASS32)
10366 #if defined (HAVE_PSINFO32_T)
10368 int note_type = NT_PSINFO;
10371 int note_type = NT_PRPSINFO;
10374 memset (&data, 0, sizeof (data));
10375 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
10376 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
10377 return elfcore_write_note (abfd, buf, bufsiz,
10378 "CORE", note_type, &data, sizeof (data));
10383 #if defined (HAVE_PSINFO_T)
10385 int note_type = NT_PSINFO;
10388 int note_type = NT_PRPSINFO;
10391 memset (&data, 0, sizeof (data));
10392 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
10393 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
10394 return elfcore_write_note (abfd, buf, bufsiz,
10395 "CORE", note_type, &data, sizeof (data));
10397 #endif /* PSINFO_T or PRPSINFO_T */
10404 elfcore_write_linux_prpsinfo32
10405 (bfd *abfd, char *buf, int *bufsiz,
10406 const struct elf_internal_linux_prpsinfo *prpsinfo)
10408 struct elf_external_linux_prpsinfo32 data;
10410 swap_linux_prpsinfo32_out (abfd, prpsinfo, &data);
10411 return elfcore_write_note (abfd, buf, bufsiz, "CORE", NT_PRPSINFO,
10412 &data, sizeof (data));
10416 elfcore_write_linux_prpsinfo64
10417 (bfd *abfd, char *buf, int *bufsiz,
10418 const struct elf_internal_linux_prpsinfo *prpsinfo)
10420 struct elf_external_linux_prpsinfo64 data;
10422 swap_linux_prpsinfo64_out (abfd, prpsinfo, &data);
10423 return elfcore_write_note (abfd, buf, bufsiz,
10424 "CORE", NT_PRPSINFO, &data, sizeof (data));
10428 elfcore_write_prstatus (bfd *abfd,
10435 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10437 if (bed->elf_backend_write_core_note != NULL)
10440 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
10442 pid, cursig, gregs);
10447 #if defined (HAVE_PRSTATUS_T)
10448 #if defined (HAVE_PRSTATUS32_T)
10449 if (bed->s->elfclass == ELFCLASS32)
10451 prstatus32_t prstat;
10453 memset (&prstat, 0, sizeof (prstat));
10454 prstat.pr_pid = pid;
10455 prstat.pr_cursig = cursig;
10456 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
10457 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
10458 NT_PRSTATUS, &prstat, sizeof (prstat));
10465 memset (&prstat, 0, sizeof (prstat));
10466 prstat.pr_pid = pid;
10467 prstat.pr_cursig = cursig;
10468 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
10469 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
10470 NT_PRSTATUS, &prstat, sizeof (prstat));
10472 #endif /* HAVE_PRSTATUS_T */
10478 #if defined (HAVE_LWPSTATUS_T)
10480 elfcore_write_lwpstatus (bfd *abfd,
10487 lwpstatus_t lwpstat;
10488 const char *note_name = "CORE";
10490 memset (&lwpstat, 0, sizeof (lwpstat));
10491 lwpstat.pr_lwpid = pid >> 16;
10492 lwpstat.pr_cursig = cursig;
10493 #if defined (HAVE_LWPSTATUS_T_PR_REG)
10494 memcpy (&lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
10495 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
10496 #if !defined(gregs)
10497 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
10498 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
10500 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
10501 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
10504 return elfcore_write_note (abfd, buf, bufsiz, note_name,
10505 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
10507 #endif /* HAVE_LWPSTATUS_T */
10509 #if defined (HAVE_PSTATUS_T)
10511 elfcore_write_pstatus (bfd *abfd,
10515 int cursig ATTRIBUTE_UNUSED,
10516 const void *gregs ATTRIBUTE_UNUSED)
10518 const char *note_name = "CORE";
10519 #if defined (HAVE_PSTATUS32_T)
10520 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10522 if (bed->s->elfclass == ELFCLASS32)
10526 memset (&pstat, 0, sizeof (pstat));
10527 pstat.pr_pid = pid & 0xffff;
10528 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
10529 NT_PSTATUS, &pstat, sizeof (pstat));
10537 memset (&pstat, 0, sizeof (pstat));
10538 pstat.pr_pid = pid & 0xffff;
10539 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
10540 NT_PSTATUS, &pstat, sizeof (pstat));
10544 #endif /* HAVE_PSTATUS_T */
10547 elfcore_write_prfpreg (bfd *abfd,
10550 const void *fpregs,
10553 const char *note_name = "CORE";
10554 return elfcore_write_note (abfd, buf, bufsiz,
10555 note_name, NT_FPREGSET, fpregs, size);
10559 elfcore_write_prxfpreg (bfd *abfd,
10562 const void *xfpregs,
10565 char *note_name = "LINUX";
10566 return elfcore_write_note (abfd, buf, bufsiz,
10567 note_name, NT_PRXFPREG, xfpregs, size);
10571 elfcore_write_xstatereg (bfd *abfd, char *buf, int *bufsiz,
10572 const void *xfpregs, int size)
10575 if (get_elf_backend_data (abfd)->elf_osabi == ELFOSABI_FREEBSD)
10576 note_name = "FreeBSD";
10578 note_name = "LINUX";
10579 return elfcore_write_note (abfd, buf, bufsiz,
10580 note_name, NT_X86_XSTATE, xfpregs, size);
10584 elfcore_write_ppc_vmx (bfd *abfd,
10587 const void *ppc_vmx,
10590 char *note_name = "LINUX";
10591 return elfcore_write_note (abfd, buf, bufsiz,
10592 note_name, NT_PPC_VMX, ppc_vmx, size);
10596 elfcore_write_ppc_vsx (bfd *abfd,
10599 const void *ppc_vsx,
10602 char *note_name = "LINUX";
10603 return elfcore_write_note (abfd, buf, bufsiz,
10604 note_name, NT_PPC_VSX, ppc_vsx, size);
10608 elfcore_write_s390_high_gprs (bfd *abfd,
10611 const void *s390_high_gprs,
10614 char *note_name = "LINUX";
10615 return elfcore_write_note (abfd, buf, bufsiz,
10616 note_name, NT_S390_HIGH_GPRS,
10617 s390_high_gprs, size);
10621 elfcore_write_s390_timer (bfd *abfd,
10624 const void *s390_timer,
10627 char *note_name = "LINUX";
10628 return elfcore_write_note (abfd, buf, bufsiz,
10629 note_name, NT_S390_TIMER, s390_timer, size);
10633 elfcore_write_s390_todcmp (bfd *abfd,
10636 const void *s390_todcmp,
10639 char *note_name = "LINUX";
10640 return elfcore_write_note (abfd, buf, bufsiz,
10641 note_name, NT_S390_TODCMP, s390_todcmp, size);
10645 elfcore_write_s390_todpreg (bfd *abfd,
10648 const void *s390_todpreg,
10651 char *note_name = "LINUX";
10652 return elfcore_write_note (abfd, buf, bufsiz,
10653 note_name, NT_S390_TODPREG, s390_todpreg, size);
10657 elfcore_write_s390_ctrs (bfd *abfd,
10660 const void *s390_ctrs,
10663 char *note_name = "LINUX";
10664 return elfcore_write_note (abfd, buf, bufsiz,
10665 note_name, NT_S390_CTRS, s390_ctrs, size);
10669 elfcore_write_s390_prefix (bfd *abfd,
10672 const void *s390_prefix,
10675 char *note_name = "LINUX";
10676 return elfcore_write_note (abfd, buf, bufsiz,
10677 note_name, NT_S390_PREFIX, s390_prefix, size);
10681 elfcore_write_s390_last_break (bfd *abfd,
10684 const void *s390_last_break,
10687 char *note_name = "LINUX";
10688 return elfcore_write_note (abfd, buf, bufsiz,
10689 note_name, NT_S390_LAST_BREAK,
10690 s390_last_break, size);
10694 elfcore_write_s390_system_call (bfd *abfd,
10697 const void *s390_system_call,
10700 char *note_name = "LINUX";
10701 return elfcore_write_note (abfd, buf, bufsiz,
10702 note_name, NT_S390_SYSTEM_CALL,
10703 s390_system_call, size);
10707 elfcore_write_s390_tdb (bfd *abfd,
10710 const void *s390_tdb,
10713 char *note_name = "LINUX";
10714 return elfcore_write_note (abfd, buf, bufsiz,
10715 note_name, NT_S390_TDB, s390_tdb, size);
10719 elfcore_write_s390_vxrs_low (bfd *abfd,
10722 const void *s390_vxrs_low,
10725 char *note_name = "LINUX";
10726 return elfcore_write_note (abfd, buf, bufsiz,
10727 note_name, NT_S390_VXRS_LOW, s390_vxrs_low, size);
10731 elfcore_write_s390_vxrs_high (bfd *abfd,
10734 const void *s390_vxrs_high,
10737 char *note_name = "LINUX";
10738 return elfcore_write_note (abfd, buf, bufsiz,
10739 note_name, NT_S390_VXRS_HIGH,
10740 s390_vxrs_high, size);
10744 elfcore_write_arm_vfp (bfd *abfd,
10747 const void *arm_vfp,
10750 char *note_name = "LINUX";
10751 return elfcore_write_note (abfd, buf, bufsiz,
10752 note_name, NT_ARM_VFP, arm_vfp, size);
10756 elfcore_write_aarch_tls (bfd *abfd,
10759 const void *aarch_tls,
10762 char *note_name = "LINUX";
10763 return elfcore_write_note (abfd, buf, bufsiz,
10764 note_name, NT_ARM_TLS, aarch_tls, size);
10768 elfcore_write_aarch_hw_break (bfd *abfd,
10771 const void *aarch_hw_break,
10774 char *note_name = "LINUX";
10775 return elfcore_write_note (abfd, buf, bufsiz,
10776 note_name, NT_ARM_HW_BREAK, aarch_hw_break, size);
10780 elfcore_write_aarch_hw_watch (bfd *abfd,
10783 const void *aarch_hw_watch,
10786 char *note_name = "LINUX";
10787 return elfcore_write_note (abfd, buf, bufsiz,
10788 note_name, NT_ARM_HW_WATCH, aarch_hw_watch, size);
10792 elfcore_write_register_note (bfd *abfd,
10795 const char *section,
10799 if (strcmp (section, ".reg2") == 0)
10800 return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size);
10801 if (strcmp (section, ".reg-xfp") == 0)
10802 return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
10803 if (strcmp (section, ".reg-xstate") == 0)
10804 return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size);
10805 if (strcmp (section, ".reg-ppc-vmx") == 0)
10806 return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
10807 if (strcmp (section, ".reg-ppc-vsx") == 0)
10808 return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size);
10809 if (strcmp (section, ".reg-s390-high-gprs") == 0)
10810 return elfcore_write_s390_high_gprs (abfd, buf, bufsiz, data, size);
10811 if (strcmp (section, ".reg-s390-timer") == 0)
10812 return elfcore_write_s390_timer (abfd, buf, bufsiz, data, size);
10813 if (strcmp (section, ".reg-s390-todcmp") == 0)
10814 return elfcore_write_s390_todcmp (abfd, buf, bufsiz, data, size);
10815 if (strcmp (section, ".reg-s390-todpreg") == 0)
10816 return elfcore_write_s390_todpreg (abfd, buf, bufsiz, data, size);
10817 if (strcmp (section, ".reg-s390-ctrs") == 0)
10818 return elfcore_write_s390_ctrs (abfd, buf, bufsiz, data, size);
10819 if (strcmp (section, ".reg-s390-prefix") == 0)
10820 return elfcore_write_s390_prefix (abfd, buf, bufsiz, data, size);
10821 if (strcmp (section, ".reg-s390-last-break") == 0)
10822 return elfcore_write_s390_last_break (abfd, buf, bufsiz, data, size);
10823 if (strcmp (section, ".reg-s390-system-call") == 0)
10824 return elfcore_write_s390_system_call (abfd, buf, bufsiz, data, size);
10825 if (strcmp (section, ".reg-s390-tdb") == 0)
10826 return elfcore_write_s390_tdb (abfd, buf, bufsiz, data, size);
10827 if (strcmp (section, ".reg-s390-vxrs-low") == 0)
10828 return elfcore_write_s390_vxrs_low (abfd, buf, bufsiz, data, size);
10829 if (strcmp (section, ".reg-s390-vxrs-high") == 0)
10830 return elfcore_write_s390_vxrs_high (abfd, buf, bufsiz, data, size);
10831 if (strcmp (section, ".reg-arm-vfp") == 0)
10832 return elfcore_write_arm_vfp (abfd, buf, bufsiz, data, size);
10833 if (strcmp (section, ".reg-aarch-tls") == 0)
10834 return elfcore_write_aarch_tls (abfd, buf, bufsiz, data, size);
10835 if (strcmp (section, ".reg-aarch-hw-break") == 0)
10836 return elfcore_write_aarch_hw_break (abfd, buf, bufsiz, data, size);
10837 if (strcmp (section, ".reg-aarch-hw-watch") == 0)
10838 return elfcore_write_aarch_hw_watch (abfd, buf, bufsiz, data, size);
10843 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
10848 while (p < buf + size)
10850 /* FIXME: bad alignment assumption. */
10851 Elf_External_Note *xnp = (Elf_External_Note *) p;
10852 Elf_Internal_Note in;
10854 if (offsetof (Elf_External_Note, name) > buf - p + size)
10857 in.type = H_GET_32 (abfd, xnp->type);
10859 in.namesz = H_GET_32 (abfd, xnp->namesz);
10860 in.namedata = xnp->name;
10861 if (in.namesz > buf - in.namedata + size)
10864 in.descsz = H_GET_32 (abfd, xnp->descsz);
10865 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
10866 in.descpos = offset + (in.descdata - buf);
10868 && (in.descdata >= buf + size
10869 || in.descsz > buf - in.descdata + size))
10872 switch (bfd_get_format (abfd))
10879 #define GROKER_ELEMENT(S,F) {S, sizeof (S) - 1, F}
10882 const char * string;
10884 bfd_boolean (* func)(bfd *, Elf_Internal_Note *);
10888 GROKER_ELEMENT ("", elfcore_grok_note),
10889 GROKER_ELEMENT ("FreeBSD", elfcore_grok_freebsd_note),
10890 GROKER_ELEMENT ("NetBSD-CORE", elfcore_grok_netbsd_note),
10891 GROKER_ELEMENT ( "OpenBSD", elfcore_grok_openbsd_note),
10892 GROKER_ELEMENT ("QNX", elfcore_grok_nto_note),
10893 GROKER_ELEMENT ("SPU/", elfcore_grok_spu_note)
10895 #undef GROKER_ELEMENT
10898 for (i = ARRAY_SIZE (grokers); i--;)
10900 if (in.namesz >= grokers[i].len
10901 && strncmp (in.namedata, grokers[i].string,
10902 grokers[i].len) == 0)
10904 if (! grokers[i].func (abfd, & in))
10913 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
10915 if (! elfobj_grok_gnu_note (abfd, &in))
10918 else if (in.namesz == sizeof "stapsdt"
10919 && strcmp (in.namedata, "stapsdt") == 0)
10921 if (! elfobj_grok_stapsdt_note (abfd, &in))
10927 p = in.descdata + BFD_ALIGN (in.descsz, 4);
10934 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
10941 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
10944 buf = (char *) bfd_malloc (size + 1);
10948 /* PR 17512: file: ec08f814
10949 0-termintate the buffer so that string searches will not overflow. */
10952 if (bfd_bread (buf, size, abfd) != size
10953 || !elf_parse_notes (abfd, buf, size, offset))
10963 /* Providing external access to the ELF program header table. */
10965 /* Return an upper bound on the number of bytes required to store a
10966 copy of ABFD's program header table entries. Return -1 if an error
10967 occurs; bfd_get_error will return an appropriate code. */
10970 bfd_get_elf_phdr_upper_bound (bfd *abfd)
10972 if (abfd->xvec->flavour != bfd_target_elf_flavour)
10974 bfd_set_error (bfd_error_wrong_format);
10978 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
10981 /* Copy ABFD's program header table entries to *PHDRS. The entries
10982 will be stored as an array of Elf_Internal_Phdr structures, as
10983 defined in include/elf/internal.h. To find out how large the
10984 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
10986 Return the number of program header table entries read, or -1 if an
10987 error occurs; bfd_get_error will return an appropriate code. */
10990 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
10994 if (abfd->xvec->flavour != bfd_target_elf_flavour)
10996 bfd_set_error (bfd_error_wrong_format);
11000 num_phdrs = elf_elfheader (abfd)->e_phnum;
11001 memcpy (phdrs, elf_tdata (abfd)->phdr,
11002 num_phdrs * sizeof (Elf_Internal_Phdr));
11007 enum elf_reloc_type_class
11008 _bfd_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
11009 const asection *rel_sec ATTRIBUTE_UNUSED,
11010 const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
11012 return reloc_class_normal;
11015 /* For RELA architectures, return the relocation value for a
11016 relocation against a local symbol. */
11019 _bfd_elf_rela_local_sym (bfd *abfd,
11020 Elf_Internal_Sym *sym,
11022 Elf_Internal_Rela *rel)
11024 asection *sec = *psec;
11025 bfd_vma relocation;
11027 relocation = (sec->output_section->vma
11028 + sec->output_offset
11030 if ((sec->flags & SEC_MERGE)
11031 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
11032 && sec->sec_info_type == SEC_INFO_TYPE_MERGE)
11035 _bfd_merged_section_offset (abfd, psec,
11036 elf_section_data (sec)->sec_info,
11037 sym->st_value + rel->r_addend);
11040 /* If we have changed the section, and our original section is
11041 marked with SEC_EXCLUDE, it means that the original
11042 SEC_MERGE section has been completely subsumed in some
11043 other SEC_MERGE section. In this case, we need to leave
11044 some info around for --emit-relocs. */
11045 if ((sec->flags & SEC_EXCLUDE) != 0)
11046 sec->kept_section = *psec;
11049 rel->r_addend -= relocation;
11050 rel->r_addend += sec->output_section->vma + sec->output_offset;
11056 _bfd_elf_rel_local_sym (bfd *abfd,
11057 Elf_Internal_Sym *sym,
11061 asection *sec = *psec;
11063 if (sec->sec_info_type != SEC_INFO_TYPE_MERGE)
11064 return sym->st_value + addend;
11066 return _bfd_merged_section_offset (abfd, psec,
11067 elf_section_data (sec)->sec_info,
11068 sym->st_value + addend);
11071 /* Adjust an address within a section. Given OFFSET within SEC, return
11072 the new offset within the section, based upon changes made to the
11073 section. Returns -1 if the offset is now invalid.
11074 The offset (in abnd out) is in target sized bytes, however big a
11078 _bfd_elf_section_offset (bfd *abfd,
11079 struct bfd_link_info *info,
11083 switch (sec->sec_info_type)
11085 case SEC_INFO_TYPE_STABS:
11086 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
11088 case SEC_INFO_TYPE_EH_FRAME:
11089 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
11092 if ((sec->flags & SEC_ELF_REVERSE_COPY) != 0)
11094 /* Reverse the offset. */
11095 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
11096 bfd_size_type address_size = bed->s->arch_size / 8;
11098 /* address_size and sec->size are in octets. Convert
11099 to bytes before subtracting the original offset. */
11100 offset = (sec->size - address_size) / bfd_octets_per_byte (abfd) - offset;
11106 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
11107 reconstruct an ELF file by reading the segments out of remote memory
11108 based on the ELF file header at EHDR_VMA and the ELF program headers it
11109 points to. If not null, *LOADBASEP is filled in with the difference
11110 between the VMAs from which the segments were read, and the VMAs the
11111 file headers (and hence BFD's idea of each section's VMA) put them at.
11113 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
11114 remote memory at target address VMA into the local buffer at MYADDR; it
11115 should return zero on success or an `errno' code on failure. TEMPL must
11116 be a BFD for an ELF target with the word size and byte order found in
11117 the remote memory. */
11120 bfd_elf_bfd_from_remote_memory
11123 bfd_size_type size,
11124 bfd_vma *loadbasep,
11125 int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type))
11127 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
11128 (templ, ehdr_vma, size, loadbasep, target_read_memory);
11132 _bfd_elf_get_synthetic_symtab (bfd *abfd,
11133 long symcount ATTRIBUTE_UNUSED,
11134 asymbol **syms ATTRIBUTE_UNUSED,
11139 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
11142 const char *relplt_name;
11143 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
11147 Elf_Internal_Shdr *hdr;
11153 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
11156 if (dynsymcount <= 0)
11159 if (!bed->plt_sym_val)
11162 relplt_name = bed->relplt_name;
11163 if (relplt_name == NULL)
11164 relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt";
11165 relplt = bfd_get_section_by_name (abfd, relplt_name);
11166 if (relplt == NULL)
11169 hdr = &elf_section_data (relplt)->this_hdr;
11170 if (hdr->sh_link != elf_dynsymtab (abfd)
11171 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
11174 plt = bfd_get_section_by_name (abfd, ".plt");
11178 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
11179 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
11182 count = relplt->size / hdr->sh_entsize;
11183 size = count * sizeof (asymbol);
11184 p = relplt->relocation;
11185 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
11187 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
11188 if (p->addend != 0)
11191 size += sizeof ("+0x") - 1 + 8 + 8 * (bed->s->elfclass == ELFCLASS64);
11193 size += sizeof ("+0x") - 1 + 8;
11198 s = *ret = (asymbol *) bfd_malloc (size);
11202 names = (char *) (s + count);
11203 p = relplt->relocation;
11205 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
11210 addr = bed->plt_sym_val (i, plt, p);
11211 if (addr == (bfd_vma) -1)
11214 *s = **p->sym_ptr_ptr;
11215 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
11216 we are defining a symbol, ensure one of them is set. */
11217 if ((s->flags & BSF_LOCAL) == 0)
11218 s->flags |= BSF_GLOBAL;
11219 s->flags |= BSF_SYNTHETIC;
11221 s->value = addr - plt->vma;
11224 len = strlen ((*p->sym_ptr_ptr)->name);
11225 memcpy (names, (*p->sym_ptr_ptr)->name, len);
11227 if (p->addend != 0)
11231 memcpy (names, "+0x", sizeof ("+0x") - 1);
11232 names += sizeof ("+0x") - 1;
11233 bfd_sprintf_vma (abfd, buf, p->addend);
11234 for (a = buf; *a == '0'; ++a)
11237 memcpy (names, a, len);
11240 memcpy (names, "@plt", sizeof ("@plt"));
11241 names += sizeof ("@plt");
11248 /* It is only used by x86-64 so far.
11249 ??? This repeats *COM* id of zero. sec->id is supposed to be unique,
11250 but current usage would allow all of _bfd_std_section to be zero. */
11251 static const asymbol lcomm_sym
11252 = GLOBAL_SYM_INIT ("LARGE_COMMON", &_bfd_elf_large_com_section);
11253 asection _bfd_elf_large_com_section
11254 = BFD_FAKE_SECTION (_bfd_elf_large_com_section, &lcomm_sym,
11255 "LARGE_COMMON", 0, SEC_IS_COMMON);
11258 _bfd_elf_post_process_headers (bfd * abfd,
11259 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
11261 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
11263 i_ehdrp = elf_elfheader (abfd);
11265 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
11267 /* To make things simpler for the loader on Linux systems we set the
11268 osabi field to ELFOSABI_GNU if the binary contains symbols of
11269 the STT_GNU_IFUNC type or STB_GNU_UNIQUE binding. */
11270 if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE
11271 && elf_tdata (abfd)->has_gnu_symbols)
11272 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_GNU;
11276 /* Return TRUE for ELF symbol types that represent functions.
11277 This is the default version of this function, which is sufficient for
11278 most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */
11281 _bfd_elf_is_function_type (unsigned int type)
11283 return (type == STT_FUNC
11284 || type == STT_GNU_IFUNC);
11287 /* If the ELF symbol SYM might be a function in SEC, return the
11288 function size and set *CODE_OFF to the function's entry point,
11289 otherwise return zero. */
11292 _bfd_elf_maybe_function_sym (const asymbol *sym, asection *sec,
11295 bfd_size_type size;
11297 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
11298 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0
11299 || sym->section != sec)
11302 *code_off = sym->value;
11304 if (!(sym->flags & BSF_SYNTHETIC))
11305 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;