1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
26 BFD support for ELF formats is being worked on.
27 Currently, the best supported back ends are for sparc and i386
28 (running svr4 or Solaris 2).
30 Documentation of the internals of the support code still needs
31 to be written. The code is changing quickly enough that we
32 haven't bothered yet. */
34 /* For sparc64-cross-sparc32. */
42 #include "libiberty.h"
44 static int elf_sort_sections (const void *, const void *);
45 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
46 static bfd_boolean prep_headers (bfd *);
47 static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
48 static bfd_boolean elfcore_read_notes (bfd *, file_ptr, bfd_size_type) ;
50 /* Swap version information in and out. The version information is
51 currently size independent. If that ever changes, this code will
52 need to move into elfcode.h. */
54 /* Swap in a Verdef structure. */
57 _bfd_elf_swap_verdef_in (bfd *abfd,
58 const Elf_External_Verdef *src,
59 Elf_Internal_Verdef *dst)
61 dst->vd_version = H_GET_16 (abfd, src->vd_version);
62 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
63 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
64 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
65 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
66 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
67 dst->vd_next = H_GET_32 (abfd, src->vd_next);
70 /* Swap out a Verdef structure. */
73 _bfd_elf_swap_verdef_out (bfd *abfd,
74 const Elf_Internal_Verdef *src,
75 Elf_External_Verdef *dst)
77 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
78 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
79 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
80 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
81 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
82 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
83 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
86 /* Swap in a Verdaux structure. */
89 _bfd_elf_swap_verdaux_in (bfd *abfd,
90 const Elf_External_Verdaux *src,
91 Elf_Internal_Verdaux *dst)
93 dst->vda_name = H_GET_32 (abfd, src->vda_name);
94 dst->vda_next = H_GET_32 (abfd, src->vda_next);
97 /* Swap out a Verdaux structure. */
100 _bfd_elf_swap_verdaux_out (bfd *abfd,
101 const Elf_Internal_Verdaux *src,
102 Elf_External_Verdaux *dst)
104 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
105 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
108 /* Swap in a Verneed structure. */
111 _bfd_elf_swap_verneed_in (bfd *abfd,
112 const Elf_External_Verneed *src,
113 Elf_Internal_Verneed *dst)
115 dst->vn_version = H_GET_16 (abfd, src->vn_version);
116 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
117 dst->vn_file = H_GET_32 (abfd, src->vn_file);
118 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
119 dst->vn_next = H_GET_32 (abfd, src->vn_next);
122 /* Swap out a Verneed structure. */
125 _bfd_elf_swap_verneed_out (bfd *abfd,
126 const Elf_Internal_Verneed *src,
127 Elf_External_Verneed *dst)
129 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
130 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
131 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
132 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
133 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
136 /* Swap in a Vernaux structure. */
139 _bfd_elf_swap_vernaux_in (bfd *abfd,
140 const Elf_External_Vernaux *src,
141 Elf_Internal_Vernaux *dst)
143 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
144 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
145 dst->vna_other = H_GET_16 (abfd, src->vna_other);
146 dst->vna_name = H_GET_32 (abfd, src->vna_name);
147 dst->vna_next = H_GET_32 (abfd, src->vna_next);
150 /* Swap out a Vernaux structure. */
153 _bfd_elf_swap_vernaux_out (bfd *abfd,
154 const Elf_Internal_Vernaux *src,
155 Elf_External_Vernaux *dst)
157 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
158 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
159 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
160 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
161 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
164 /* Swap in a Versym structure. */
167 _bfd_elf_swap_versym_in (bfd *abfd,
168 const Elf_External_Versym *src,
169 Elf_Internal_Versym *dst)
171 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
174 /* Swap out a Versym structure. */
177 _bfd_elf_swap_versym_out (bfd *abfd,
178 const Elf_Internal_Versym *src,
179 Elf_External_Versym *dst)
181 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
184 /* Standard ELF hash function. Do not change this function; you will
185 cause invalid hash tables to be generated. */
188 bfd_elf_hash (const char *namearg)
190 const unsigned char *name = (const unsigned char *) namearg;
195 while ((ch = *name++) != '\0')
198 if ((g = (h & 0xf0000000)) != 0)
201 /* The ELF ABI says `h &= ~g', but this is equivalent in
202 this case and on some machines one insn instead of two. */
206 return h & 0xffffffff;
209 /* Read a specified number of bytes at a specified offset in an ELF
210 file, into a newly allocated buffer, and return a pointer to the
214 elf_read (bfd *abfd, file_ptr offset, bfd_size_type size)
218 if ((buf = bfd_alloc (abfd, size)) == NULL)
220 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
222 if (bfd_bread (buf, size, abfd) != size)
224 if (bfd_get_error () != bfd_error_system_call)
225 bfd_set_error (bfd_error_file_truncated);
232 bfd_elf_mkobject (bfd *abfd)
234 /* This just does initialization. */
235 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
236 elf_tdata (abfd) = bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
237 if (elf_tdata (abfd) == 0)
239 /* Since everything is done at close time, do we need any
246 bfd_elf_mkcorefile (bfd *abfd)
248 /* I think this can be done just like an object file. */
249 return bfd_elf_mkobject (abfd);
253 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
255 Elf_Internal_Shdr **i_shdrp;
256 bfd_byte *shstrtab = NULL;
258 bfd_size_type shstrtabsize;
260 i_shdrp = elf_elfsections (abfd);
261 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
264 shstrtab = i_shdrp[shindex]->contents;
265 if (shstrtab == NULL)
267 /* No cached one, attempt to read, and cache what we read. */
268 offset = i_shdrp[shindex]->sh_offset;
269 shstrtabsize = i_shdrp[shindex]->sh_size;
270 shstrtab = elf_read (abfd, offset, shstrtabsize);
271 i_shdrp[shindex]->contents = shstrtab;
273 return (char *) shstrtab;
277 bfd_elf_string_from_elf_section (bfd *abfd,
278 unsigned int shindex,
279 unsigned int strindex)
281 Elf_Internal_Shdr *hdr;
286 hdr = elf_elfsections (abfd)[shindex];
288 if (hdr->contents == NULL
289 && bfd_elf_get_str_section (abfd, shindex) == NULL)
292 if (strindex >= hdr->sh_size)
294 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
295 (*_bfd_error_handler)
296 (_("%B: invalid string offset %u >= %lu for section `%s'"),
297 abfd, strindex, (unsigned long) hdr->sh_size,
298 (shindex == shstrndx && strindex == hdr->sh_name
300 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
304 return ((char *) hdr->contents) + strindex;
307 /* Read and convert symbols to internal format.
308 SYMCOUNT specifies the number of symbols to read, starting from
309 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
310 are non-NULL, they are used to store the internal symbols, external
311 symbols, and symbol section index extensions, respectively. */
314 bfd_elf_get_elf_syms (bfd *ibfd,
315 Elf_Internal_Shdr *symtab_hdr,
318 Elf_Internal_Sym *intsym_buf,
320 Elf_External_Sym_Shndx *extshndx_buf)
322 Elf_Internal_Shdr *shndx_hdr;
324 const bfd_byte *esym;
325 Elf_External_Sym_Shndx *alloc_extshndx;
326 Elf_External_Sym_Shndx *shndx;
327 Elf_Internal_Sym *isym;
328 Elf_Internal_Sym *isymend;
329 const struct elf_backend_data *bed;
337 /* Normal syms might have section extension entries. */
339 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
340 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
342 /* Read the symbols. */
344 alloc_extshndx = NULL;
345 bed = get_elf_backend_data (ibfd);
346 extsym_size = bed->s->sizeof_sym;
347 amt = symcount * extsym_size;
348 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
349 if (extsym_buf == NULL)
351 alloc_ext = bfd_malloc (amt);
352 extsym_buf = alloc_ext;
354 if (extsym_buf == NULL
355 || bfd_seek (ibfd, pos, SEEK_SET) != 0
356 || bfd_bread (extsym_buf, amt, ibfd) != amt)
362 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
366 amt = symcount * sizeof (Elf_External_Sym_Shndx);
367 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
368 if (extshndx_buf == NULL)
370 alloc_extshndx = bfd_malloc (amt);
371 extshndx_buf = alloc_extshndx;
373 if (extshndx_buf == NULL
374 || bfd_seek (ibfd, pos, SEEK_SET) != 0
375 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
382 if (intsym_buf == NULL)
384 bfd_size_type amt = symcount * sizeof (Elf_Internal_Sym);
385 intsym_buf = bfd_malloc (amt);
386 if (intsym_buf == NULL)
390 /* Convert the symbols to internal form. */
391 isymend = intsym_buf + symcount;
392 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
394 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
395 (*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym);
398 if (alloc_ext != NULL)
400 if (alloc_extshndx != NULL)
401 free (alloc_extshndx);
406 /* Look up a symbol name. */
408 bfd_elf_sym_name (bfd *abfd,
409 Elf_Internal_Shdr *symtab_hdr,
410 Elf_Internal_Sym *isym)
412 unsigned int iname = isym->st_name;
413 unsigned int shindex = symtab_hdr->sh_link;
414 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
415 /* Check for a bogus st_shndx to avoid crashing. */
416 && isym->st_shndx < elf_numsections (abfd)
417 && !(isym->st_shndx >= SHN_LORESERVE && isym->st_shndx <= SHN_HIRESERVE))
419 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
420 shindex = elf_elfheader (abfd)->e_shstrndx;
423 return bfd_elf_string_from_elf_section (abfd, shindex, iname);
426 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
427 sections. The first element is the flags, the rest are section
430 typedef union elf_internal_group {
431 Elf_Internal_Shdr *shdr;
433 } Elf_Internal_Group;
435 /* Return the name of the group signature symbol. Why isn't the
436 signature just a string? */
439 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
441 Elf_Internal_Shdr *hdr;
442 unsigned char esym[sizeof (Elf64_External_Sym)];
443 Elf_External_Sym_Shndx eshndx;
444 Elf_Internal_Sym isym;
446 /* First we need to ensure the symbol table is available. */
447 if (! bfd_section_from_shdr (abfd, ghdr->sh_link))
450 /* Go read the symbol. */
451 hdr = &elf_tdata (abfd)->symtab_hdr;
452 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
453 &isym, esym, &eshndx) == NULL)
456 return bfd_elf_sym_name (abfd, hdr, &isym);
459 /* Set next_in_group list pointer, and group name for NEWSECT. */
462 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
464 unsigned int num_group = elf_tdata (abfd)->num_group;
466 /* If num_group is zero, read in all SHT_GROUP sections. The count
467 is set to -1 if there are no SHT_GROUP sections. */
470 unsigned int i, shnum;
472 /* First count the number of groups. If we have a SHT_GROUP
473 section with just a flag word (ie. sh_size is 4), ignore it. */
474 shnum = elf_numsections (abfd);
476 for (i = 0; i < shnum; i++)
478 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
479 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
484 num_group = (unsigned) -1;
485 elf_tdata (abfd)->num_group = num_group;
489 /* We keep a list of elf section headers for group sections,
490 so we can find them quickly. */
491 bfd_size_type amt = num_group * sizeof (Elf_Internal_Shdr *);
492 elf_tdata (abfd)->group_sect_ptr = bfd_alloc (abfd, amt);
493 if (elf_tdata (abfd)->group_sect_ptr == NULL)
497 for (i = 0; i < shnum; i++)
499 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
500 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
503 Elf_Internal_Group *dest;
505 /* Add to list of sections. */
506 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
509 /* Read the raw contents. */
510 BFD_ASSERT (sizeof (*dest) >= 4);
511 amt = shdr->sh_size * sizeof (*dest) / 4;
512 shdr->contents = bfd_alloc (abfd, amt);
513 if (shdr->contents == NULL
514 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
515 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
519 /* Translate raw contents, a flag word followed by an
520 array of elf section indices all in target byte order,
521 to the flag word followed by an array of elf section
523 src = shdr->contents + shdr->sh_size;
524 dest = (Elf_Internal_Group *) (shdr->contents + amt);
531 idx = H_GET_32 (abfd, src);
532 if (src == shdr->contents)
535 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
536 shdr->bfd_section->flags
537 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
542 ((*_bfd_error_handler)
543 (_("%B: invalid SHT_GROUP entry"), abfd));
546 dest->shdr = elf_elfsections (abfd)[idx];
553 if (num_group != (unsigned) -1)
557 for (i = 0; i < num_group; i++)
559 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
560 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
561 unsigned int n_elt = shdr->sh_size / 4;
563 /* Look through this group's sections to see if current
564 section is a member. */
566 if ((++idx)->shdr == hdr)
570 /* We are a member of this group. Go looking through
571 other members to see if any others are linked via
573 idx = (Elf_Internal_Group *) shdr->contents;
574 n_elt = shdr->sh_size / 4;
576 if ((s = (++idx)->shdr->bfd_section) != NULL
577 && elf_next_in_group (s) != NULL)
581 /* Snarf the group name from other member, and
582 insert current section in circular list. */
583 elf_group_name (newsect) = elf_group_name (s);
584 elf_next_in_group (newsect) = elf_next_in_group (s);
585 elf_next_in_group (s) = newsect;
591 gname = group_signature (abfd, shdr);
594 elf_group_name (newsect) = gname;
596 /* Start a circular list with one element. */
597 elf_next_in_group (newsect) = newsect;
600 /* If the group section has been created, point to the
602 if (shdr->bfd_section != NULL)
603 elf_next_in_group (shdr->bfd_section) = newsect;
611 if (elf_group_name (newsect) == NULL)
613 (*_bfd_error_handler) (_("%B: no group info for section %A"),
620 _bfd_elf_setup_group_pointers (bfd *abfd)
623 unsigned int num_group = elf_tdata (abfd)->num_group;
624 bfd_boolean result = TRUE;
626 if (num_group == (unsigned) -1)
629 for (i = 0; i < num_group; i++)
631 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
632 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
633 unsigned int n_elt = shdr->sh_size / 4;
636 if ((++idx)->shdr->bfd_section)
637 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
638 else if (idx->shdr->sh_type == SHT_RELA
639 || idx->shdr->sh_type == SHT_REL)
640 /* We won't include relocation sections in section groups in
641 output object files. We adjust the group section size here
642 so that relocatable link will work correctly when
643 relocation sections are in section group in input object
645 shdr->bfd_section->size -= 4;
648 /* There are some unknown sections in the group. */
649 (*_bfd_error_handler)
650 (_("%B: unknown [%d] section `%s' in group [%s]"),
652 (unsigned int) idx->shdr->sh_type,
653 bfd_elf_string_from_elf_section (abfd,
654 (elf_elfheader (abfd)
657 shdr->bfd_section->name);
665 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
667 return elf_next_in_group (sec) != NULL;
670 /* Make a BFD section from an ELF section. We store a pointer to the
671 BFD section in the bfd_section field of the header. */
674 _bfd_elf_make_section_from_shdr (bfd *abfd,
675 Elf_Internal_Shdr *hdr,
681 const struct elf_backend_data *bed;
683 if (hdr->bfd_section != NULL)
685 BFD_ASSERT (strcmp (name,
686 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
690 newsect = bfd_make_section_anyway (abfd, name);
694 hdr->bfd_section = newsect;
695 elf_section_data (newsect)->this_hdr = *hdr;
696 elf_section_data (newsect)->this_idx = shindex;
698 /* Always use the real type/flags. */
699 elf_section_type (newsect) = hdr->sh_type;
700 elf_section_flags (newsect) = hdr->sh_flags;
702 newsect->filepos = hdr->sh_offset;
704 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
705 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
706 || ! bfd_set_section_alignment (abfd, newsect,
707 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
710 flags = SEC_NO_FLAGS;
711 if (hdr->sh_type != SHT_NOBITS)
712 flags |= SEC_HAS_CONTENTS;
713 if (hdr->sh_type == SHT_GROUP)
714 flags |= SEC_GROUP | SEC_EXCLUDE;
715 if ((hdr->sh_flags & SHF_ALLOC) != 0)
718 if (hdr->sh_type != SHT_NOBITS)
721 if ((hdr->sh_flags & SHF_WRITE) == 0)
722 flags |= SEC_READONLY;
723 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
725 else if ((flags & SEC_LOAD) != 0)
727 if ((hdr->sh_flags & SHF_MERGE) != 0)
730 newsect->entsize = hdr->sh_entsize;
731 if ((hdr->sh_flags & SHF_STRINGS) != 0)
732 flags |= SEC_STRINGS;
734 if (hdr->sh_flags & SHF_GROUP)
735 if (!setup_group (abfd, hdr, newsect))
737 if ((hdr->sh_flags & SHF_TLS) != 0)
738 flags |= SEC_THREAD_LOCAL;
740 /* The debugging sections appear to be recognized only by name, not
743 static const char *debug_sec_names [] =
752 for (i = ARRAY_SIZE (debug_sec_names); i--;)
753 if (strncmp (name, debug_sec_names[i], strlen (debug_sec_names[i])) == 0)
757 flags |= SEC_DEBUGGING;
760 /* As a GNU extension, if the name begins with .gnu.linkonce, we
761 only link a single copy of the section. This is used to support
762 g++. g++ will emit each template expansion in its own section.
763 The symbols will be defined as weak, so that multiple definitions
764 are permitted. The GNU linker extension is to actually discard
765 all but one of the sections. */
766 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
767 && elf_next_in_group (newsect) == NULL)
768 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
770 bed = get_elf_backend_data (abfd);
771 if (bed->elf_backend_section_flags)
772 if (! bed->elf_backend_section_flags (&flags, hdr))
775 if (! bfd_set_section_flags (abfd, newsect, flags))
778 if ((flags & SEC_ALLOC) != 0)
780 Elf_Internal_Phdr *phdr;
783 /* Look through the phdrs to see if we need to adjust the lma.
784 If all the p_paddr fields are zero, we ignore them, since
785 some ELF linkers produce such output. */
786 phdr = elf_tdata (abfd)->phdr;
787 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
789 if (phdr->p_paddr != 0)
792 if (i < elf_elfheader (abfd)->e_phnum)
794 phdr = elf_tdata (abfd)->phdr;
795 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
797 /* This section is part of this segment if its file
798 offset plus size lies within the segment's memory
799 span and, if the section is loaded, the extent of the
800 loaded data lies within the extent of the segment.
802 Note - we used to check the p_paddr field as well, and
803 refuse to set the LMA if it was 0. This is wrong
804 though, as a perfectly valid initialised segment can
805 have a p_paddr of zero. Some architectures, eg ARM,
806 place special significance on the address 0 and
807 executables need to be able to have a segment which
808 covers this address. */
809 if (phdr->p_type == PT_LOAD
810 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
811 && (hdr->sh_offset + hdr->sh_size
812 <= phdr->p_offset + phdr->p_memsz)
813 && ((flags & SEC_LOAD) == 0
814 || (hdr->sh_offset + hdr->sh_size
815 <= phdr->p_offset + phdr->p_filesz)))
817 if ((flags & SEC_LOAD) == 0)
818 newsect->lma = (phdr->p_paddr
819 + hdr->sh_addr - phdr->p_vaddr);
821 /* We used to use the same adjustment for SEC_LOAD
822 sections, but that doesn't work if the segment
823 is packed with code from multiple VMAs.
824 Instead we calculate the section LMA based on
825 the segment LMA. It is assumed that the
826 segment will contain sections with contiguous
827 LMAs, even if the VMAs are not. */
828 newsect->lma = (phdr->p_paddr
829 + hdr->sh_offset - phdr->p_offset);
831 /* With contiguous segments, we can't tell from file
832 offsets whether a section with zero size should
833 be placed at the end of one segment or the
834 beginning of the next. Decide based on vaddr. */
835 if (hdr->sh_addr >= phdr->p_vaddr
836 && (hdr->sh_addr + hdr->sh_size
837 <= phdr->p_vaddr + phdr->p_memsz))
852 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
855 Helper functions for GDB to locate the string tables.
856 Since BFD hides string tables from callers, GDB needs to use an
857 internal hook to find them. Sun's .stabstr, in particular,
858 isn't even pointed to by the .stab section, so ordinary
859 mechanisms wouldn't work to find it, even if we had some.
862 struct elf_internal_shdr *
863 bfd_elf_find_section (bfd *abfd, char *name)
865 Elf_Internal_Shdr **i_shdrp;
870 i_shdrp = elf_elfsections (abfd);
873 shstrtab = bfd_elf_get_str_section (abfd,
874 elf_elfheader (abfd)->e_shstrndx);
875 if (shstrtab != NULL)
877 max = elf_numsections (abfd);
878 for (i = 1; i < max; i++)
879 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
886 const char *const bfd_elf_section_type_names[] = {
887 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
888 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
889 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
892 /* ELF relocs are against symbols. If we are producing relocatable
893 output, and the reloc is against an external symbol, and nothing
894 has given us any additional addend, the resulting reloc will also
895 be against the same symbol. In such a case, we don't want to
896 change anything about the way the reloc is handled, since it will
897 all be done at final link time. Rather than put special case code
898 into bfd_perform_relocation, all the reloc types use this howto
899 function. It just short circuits the reloc if producing
900 relocatable output against an external symbol. */
902 bfd_reloc_status_type
903 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
904 arelent *reloc_entry,
906 void *data ATTRIBUTE_UNUSED,
907 asection *input_section,
909 char **error_message ATTRIBUTE_UNUSED)
911 if (output_bfd != NULL
912 && (symbol->flags & BSF_SECTION_SYM) == 0
913 && (! reloc_entry->howto->partial_inplace
914 || reloc_entry->addend == 0))
916 reloc_entry->address += input_section->output_offset;
920 return bfd_reloc_continue;
923 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
926 merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED,
929 BFD_ASSERT (sec->sec_info_type == ELF_INFO_TYPE_MERGE);
930 sec->sec_info_type = ELF_INFO_TYPE_NONE;
933 /* Finish SHF_MERGE section merging. */
936 _bfd_elf_merge_sections (bfd *abfd, struct bfd_link_info *info)
941 if (!is_elf_hash_table (info->hash))
944 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
945 if ((ibfd->flags & DYNAMIC) == 0)
946 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
947 if ((sec->flags & SEC_MERGE) != 0
948 && !bfd_is_abs_section (sec->output_section))
950 struct bfd_elf_section_data *secdata;
952 secdata = elf_section_data (sec);
953 if (! _bfd_add_merge_section (abfd,
954 &elf_hash_table (info)->merge_info,
955 sec, &secdata->sec_info))
957 else if (secdata->sec_info)
958 sec->sec_info_type = ELF_INFO_TYPE_MERGE;
961 if (elf_hash_table (info)->merge_info != NULL)
962 _bfd_merge_sections (abfd, info, elf_hash_table (info)->merge_info,
963 merge_sections_remove_hook);
968 _bfd_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
970 sec->output_section = bfd_abs_section_ptr;
971 sec->output_offset = sec->vma;
972 if (!is_elf_hash_table (info->hash))
975 sec->sec_info_type = ELF_INFO_TYPE_JUST_SYMS;
978 /* Copy the program header and other data from one object module to
982 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
984 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
985 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
988 BFD_ASSERT (!elf_flags_init (obfd)
989 || (elf_elfheader (obfd)->e_flags
990 == elf_elfheader (ibfd)->e_flags));
992 elf_gp (obfd) = elf_gp (ibfd);
993 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
994 elf_flags_init (obfd) = TRUE;
998 /* Print out the program headers. */
1001 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1004 Elf_Internal_Phdr *p;
1006 bfd_byte *dynbuf = NULL;
1008 p = elf_tdata (abfd)->phdr;
1013 fprintf (f, _("\nProgram Header:\n"));
1014 c = elf_elfheader (abfd)->e_phnum;
1015 for (i = 0; i < c; i++, p++)
1022 case PT_NULL: pt = "NULL"; break;
1023 case PT_LOAD: pt = "LOAD"; break;
1024 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1025 case PT_INTERP: pt = "INTERP"; break;
1026 case PT_NOTE: pt = "NOTE"; break;
1027 case PT_SHLIB: pt = "SHLIB"; break;
1028 case PT_PHDR: pt = "PHDR"; break;
1029 case PT_TLS: pt = "TLS"; break;
1030 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1031 case PT_GNU_STACK: pt = "STACK"; break;
1032 case PT_GNU_RELRO: pt = "RELRO"; break;
1033 default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
1035 fprintf (f, "%8s off 0x", pt);
1036 bfd_fprintf_vma (abfd, f, p->p_offset);
1037 fprintf (f, " vaddr 0x");
1038 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1039 fprintf (f, " paddr 0x");
1040 bfd_fprintf_vma (abfd, f, p->p_paddr);
1041 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1042 fprintf (f, " filesz 0x");
1043 bfd_fprintf_vma (abfd, f, p->p_filesz);
1044 fprintf (f, " memsz 0x");
1045 bfd_fprintf_vma (abfd, f, p->p_memsz);
1046 fprintf (f, " flags %c%c%c",
1047 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1048 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1049 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1050 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1051 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1056 s = bfd_get_section_by_name (abfd, ".dynamic");
1060 unsigned long shlink;
1061 bfd_byte *extdyn, *extdynend;
1063 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1065 fprintf (f, _("\nDynamic Section:\n"));
1067 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1070 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1073 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1075 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1076 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1079 extdynend = extdyn + s->size;
1080 for (; extdyn < extdynend; extdyn += extdynsize)
1082 Elf_Internal_Dyn dyn;
1085 bfd_boolean stringp;
1087 (*swap_dyn_in) (abfd, extdyn, &dyn);
1089 if (dyn.d_tag == DT_NULL)
1096 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1100 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1101 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1102 case DT_PLTGOT: name = "PLTGOT"; break;
1103 case DT_HASH: name = "HASH"; break;
1104 case DT_STRTAB: name = "STRTAB"; break;
1105 case DT_SYMTAB: name = "SYMTAB"; break;
1106 case DT_RELA: name = "RELA"; break;
1107 case DT_RELASZ: name = "RELASZ"; break;
1108 case DT_RELAENT: name = "RELAENT"; break;
1109 case DT_STRSZ: name = "STRSZ"; break;
1110 case DT_SYMENT: name = "SYMENT"; break;
1111 case DT_INIT: name = "INIT"; break;
1112 case DT_FINI: name = "FINI"; break;
1113 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1114 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1115 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1116 case DT_REL: name = "REL"; break;
1117 case DT_RELSZ: name = "RELSZ"; break;
1118 case DT_RELENT: name = "RELENT"; break;
1119 case DT_PLTREL: name = "PLTREL"; break;
1120 case DT_DEBUG: name = "DEBUG"; break;
1121 case DT_TEXTREL: name = "TEXTREL"; break;
1122 case DT_JMPREL: name = "JMPREL"; break;
1123 case DT_BIND_NOW: name = "BIND_NOW"; break;
1124 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1125 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1126 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1127 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1128 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1129 case DT_FLAGS: name = "FLAGS"; break;
1130 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1131 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1132 case DT_CHECKSUM: name = "CHECKSUM"; break;
1133 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1134 case DT_MOVEENT: name = "MOVEENT"; break;
1135 case DT_MOVESZ: name = "MOVESZ"; break;
1136 case DT_FEATURE: name = "FEATURE"; break;
1137 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1138 case DT_SYMINSZ: name = "SYMINSZ"; break;
1139 case DT_SYMINENT: name = "SYMINENT"; break;
1140 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1141 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1142 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1143 case DT_PLTPAD: name = "PLTPAD"; break;
1144 case DT_MOVETAB: name = "MOVETAB"; break;
1145 case DT_SYMINFO: name = "SYMINFO"; break;
1146 case DT_RELACOUNT: name = "RELACOUNT"; break;
1147 case DT_RELCOUNT: name = "RELCOUNT"; break;
1148 case DT_FLAGS_1: name = "FLAGS_1"; break;
1149 case DT_VERSYM: name = "VERSYM"; break;
1150 case DT_VERDEF: name = "VERDEF"; break;
1151 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1152 case DT_VERNEED: name = "VERNEED"; break;
1153 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1154 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1155 case DT_USED: name = "USED"; break;
1156 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1159 fprintf (f, " %-11s ", name);
1161 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1165 unsigned int tagv = dyn.d_un.d_val;
1167 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1170 fprintf (f, "%s", string);
1179 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1180 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1182 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1186 if (elf_dynverdef (abfd) != 0)
1188 Elf_Internal_Verdef *t;
1190 fprintf (f, _("\nVersion definitions:\n"));
1191 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1193 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1194 t->vd_flags, t->vd_hash, t->vd_nodename);
1195 if (t->vd_auxptr->vda_nextptr != NULL)
1197 Elf_Internal_Verdaux *a;
1200 for (a = t->vd_auxptr->vda_nextptr;
1203 fprintf (f, "%s ", a->vda_nodename);
1209 if (elf_dynverref (abfd) != 0)
1211 Elf_Internal_Verneed *t;
1213 fprintf (f, _("\nVersion References:\n"));
1214 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1216 Elf_Internal_Vernaux *a;
1218 fprintf (f, _(" required from %s:\n"), t->vn_filename);
1219 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1220 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1221 a->vna_flags, a->vna_other, a->vna_nodename);
1233 /* Display ELF-specific fields of a symbol. */
1236 bfd_elf_print_symbol (bfd *abfd,
1239 bfd_print_symbol_type how)
1244 case bfd_print_symbol_name:
1245 fprintf (file, "%s", symbol->name);
1247 case bfd_print_symbol_more:
1248 fprintf (file, "elf ");
1249 bfd_fprintf_vma (abfd, file, symbol->value);
1250 fprintf (file, " %lx", (long) symbol->flags);
1252 case bfd_print_symbol_all:
1254 const char *section_name;
1255 const char *name = NULL;
1256 const struct elf_backend_data *bed;
1257 unsigned char st_other;
1260 section_name = symbol->section ? symbol->section->name : "(*none*)";
1262 bed = get_elf_backend_data (abfd);
1263 if (bed->elf_backend_print_symbol_all)
1264 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1268 name = symbol->name;
1269 bfd_print_symbol_vandf (abfd, file, symbol);
1272 fprintf (file, " %s\t", section_name);
1273 /* Print the "other" value for a symbol. For common symbols,
1274 we've already printed the size; now print the alignment.
1275 For other symbols, we have no specified alignment, and
1276 we've printed the address; now print the size. */
1277 if (bfd_is_com_section (symbol->section))
1278 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1280 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1281 bfd_fprintf_vma (abfd, file, val);
1283 /* If we have version information, print it. */
1284 if (elf_tdata (abfd)->dynversym_section != 0
1285 && (elf_tdata (abfd)->dynverdef_section != 0
1286 || elf_tdata (abfd)->dynverref_section != 0))
1288 unsigned int vernum;
1289 const char *version_string;
1291 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1294 version_string = "";
1295 else if (vernum == 1)
1296 version_string = "Base";
1297 else if (vernum <= elf_tdata (abfd)->cverdefs)
1299 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1302 Elf_Internal_Verneed *t;
1304 version_string = "";
1305 for (t = elf_tdata (abfd)->verref;
1309 Elf_Internal_Vernaux *a;
1311 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1313 if (a->vna_other == vernum)
1315 version_string = a->vna_nodename;
1322 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1323 fprintf (file, " %-11s", version_string);
1328 fprintf (file, " (%s)", version_string);
1329 for (i = 10 - strlen (version_string); i > 0; --i)
1334 /* If the st_other field is not zero, print it. */
1335 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1340 case STV_INTERNAL: fprintf (file, " .internal"); break;
1341 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1342 case STV_PROTECTED: fprintf (file, " .protected"); break;
1344 /* Some other non-defined flags are also present, so print
1346 fprintf (file, " 0x%02x", (unsigned int) st_other);
1349 fprintf (file, " %s", name);
1355 /* Create an entry in an ELF linker hash table. */
1357 struct bfd_hash_entry *
1358 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
1359 struct bfd_hash_table *table,
1362 /* Allocate the structure if it has not already been allocated by a
1366 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1371 /* Call the allocation method of the superclass. */
1372 entry = _bfd_link_hash_newfunc (entry, table, string);
1375 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1376 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1378 /* Set local fields. */
1381 ret->got = ret->plt = htab->init_refcount;
1382 memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry)
1383 - offsetof (struct elf_link_hash_entry, size)));
1384 /* Assume that we have been called by a non-ELF symbol reader.
1385 This flag is then reset by the code which reads an ELF input
1386 file. This ensures that a symbol created by a non-ELF symbol
1387 reader will have the flag set correctly. */
1394 /* Copy data from an indirect symbol to its direct symbol, hiding the
1395 old indirect symbol. Also used for copying flags to a weakdef. */
1398 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data *bed,
1399 struct elf_link_hash_entry *dir,
1400 struct elf_link_hash_entry *ind)
1403 bfd_signed_vma lowest_valid = bed->can_refcount;
1405 /* Copy down any references that we may have already seen to the
1406 symbol which just became indirect. */
1408 dir->ref_dynamic |= ind->ref_dynamic;
1409 dir->ref_regular |= ind->ref_regular;
1410 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1411 dir->non_got_ref |= ind->non_got_ref;
1412 dir->needs_plt |= ind->needs_plt;
1413 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1415 if (ind->root.type != bfd_link_hash_indirect)
1418 /* Copy over the global and procedure linkage table refcount entries.
1419 These may have been already set up by a check_relocs routine. */
1420 tmp = dir->got.refcount;
1421 if (tmp < lowest_valid)
1423 dir->got.refcount = ind->got.refcount;
1424 ind->got.refcount = tmp;
1427 BFD_ASSERT (ind->got.refcount < lowest_valid);
1429 tmp = dir->plt.refcount;
1430 if (tmp < lowest_valid)
1432 dir->plt.refcount = ind->plt.refcount;
1433 ind->plt.refcount = tmp;
1436 BFD_ASSERT (ind->plt.refcount < lowest_valid);
1438 if (dir->dynindx == -1)
1440 dir->dynindx = ind->dynindx;
1441 dir->dynstr_index = ind->dynstr_index;
1443 ind->dynstr_index = 0;
1446 BFD_ASSERT (ind->dynindx == -1);
1450 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info,
1451 struct elf_link_hash_entry *h,
1452 bfd_boolean force_local)
1454 h->plt = elf_hash_table (info)->init_offset;
1458 h->forced_local = 1;
1459 if (h->dynindx != -1)
1462 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1468 /* Initialize an ELF linker hash table. */
1471 _bfd_elf_link_hash_table_init
1472 (struct elf_link_hash_table *table,
1474 struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
1475 struct bfd_hash_table *,
1480 table->dynamic_sections_created = FALSE;
1481 table->dynobj = NULL;
1482 /* Make sure can_refcount is extended to the width and signedness of
1483 init_refcount before we subtract one from it. */
1484 table->init_refcount.refcount = get_elf_backend_data (abfd)->can_refcount;
1485 table->init_refcount.refcount -= 1;
1486 table->init_offset.offset = -(bfd_vma) 1;
1487 /* The first dynamic symbol is a dummy. */
1488 table->dynsymcount = 1;
1489 table->dynstr = NULL;
1490 table->bucketcount = 0;
1491 table->needed = NULL;
1493 table->merge_info = NULL;
1494 memset (&table->stab_info, 0, sizeof (table->stab_info));
1495 memset (&table->eh_info, 0, sizeof (table->eh_info));
1496 table->dynlocal = NULL;
1497 table->runpath = NULL;
1498 table->tls_sec = NULL;
1499 table->tls_size = 0;
1500 table->loaded = NULL;
1501 table->is_relocatable_executable = FALSE;
1503 ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc);
1504 table->root.type = bfd_link_elf_hash_table;
1509 /* Create an ELF linker hash table. */
1511 struct bfd_link_hash_table *
1512 _bfd_elf_link_hash_table_create (bfd *abfd)
1514 struct elf_link_hash_table *ret;
1515 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1517 ret = bfd_malloc (amt);
1521 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
1530 /* This is a hook for the ELF emulation code in the generic linker to
1531 tell the backend linker what file name to use for the DT_NEEDED
1532 entry for a dynamic object. */
1535 bfd_elf_set_dt_needed_name (bfd *abfd, const char *name)
1537 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1538 && bfd_get_format (abfd) == bfd_object)
1539 elf_dt_name (abfd) = name;
1543 bfd_elf_get_dyn_lib_class (bfd *abfd)
1546 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1547 && bfd_get_format (abfd) == bfd_object)
1548 lib_class = elf_dyn_lib_class (abfd);
1555 bfd_elf_set_dyn_lib_class (bfd *abfd, int lib_class)
1557 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1558 && bfd_get_format (abfd) == bfd_object)
1559 elf_dyn_lib_class (abfd) = lib_class;
1562 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1563 the linker ELF emulation code. */
1565 struct bfd_link_needed_list *
1566 bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED,
1567 struct bfd_link_info *info)
1569 if (! is_elf_hash_table (info->hash))
1571 return elf_hash_table (info)->needed;
1574 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1575 hook for the linker ELF emulation code. */
1577 struct bfd_link_needed_list *
1578 bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED,
1579 struct bfd_link_info *info)
1581 if (! is_elf_hash_table (info->hash))
1583 return elf_hash_table (info)->runpath;
1586 /* Get the name actually used for a dynamic object for a link. This
1587 is the SONAME entry if there is one. Otherwise, it is the string
1588 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1591 bfd_elf_get_dt_soname (bfd *abfd)
1593 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1594 && bfd_get_format (abfd) == bfd_object)
1595 return elf_dt_name (abfd);
1599 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1600 the ELF linker emulation code. */
1603 bfd_elf_get_bfd_needed_list (bfd *abfd,
1604 struct bfd_link_needed_list **pneeded)
1607 bfd_byte *dynbuf = NULL;
1609 unsigned long shlink;
1610 bfd_byte *extdyn, *extdynend;
1612 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1616 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1617 || bfd_get_format (abfd) != bfd_object)
1620 s = bfd_get_section_by_name (abfd, ".dynamic");
1621 if (s == NULL || s->size == 0)
1624 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1627 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1631 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1633 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1634 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1637 extdynend = extdyn + s->size;
1638 for (; extdyn < extdynend; extdyn += extdynsize)
1640 Elf_Internal_Dyn dyn;
1642 (*swap_dyn_in) (abfd, extdyn, &dyn);
1644 if (dyn.d_tag == DT_NULL)
1647 if (dyn.d_tag == DT_NEEDED)
1650 struct bfd_link_needed_list *l;
1651 unsigned int tagv = dyn.d_un.d_val;
1654 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1659 l = bfd_alloc (abfd, amt);
1680 /* Allocate an ELF string table--force the first byte to be zero. */
1682 struct bfd_strtab_hash *
1683 _bfd_elf_stringtab_init (void)
1685 struct bfd_strtab_hash *ret;
1687 ret = _bfd_stringtab_init ();
1692 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1693 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1694 if (loc == (bfd_size_type) -1)
1696 _bfd_stringtab_free (ret);
1703 /* ELF .o/exec file reading */
1705 /* Create a new bfd section from an ELF section header. */
1708 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1710 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1711 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1712 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1715 name = bfd_elf_string_from_elf_section (abfd,
1716 elf_elfheader (abfd)->e_shstrndx,
1719 switch (hdr->sh_type)
1722 /* Inactive section. Throw it away. */
1725 case SHT_PROGBITS: /* Normal section with contents. */
1726 case SHT_NOBITS: /* .bss section. */
1727 case SHT_HASH: /* .hash section. */
1728 case SHT_NOTE: /* .note section. */
1729 case SHT_INIT_ARRAY: /* .init_array section. */
1730 case SHT_FINI_ARRAY: /* .fini_array section. */
1731 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1732 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1733 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1735 case SHT_DYNAMIC: /* Dynamic linking information. */
1736 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1738 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1740 Elf_Internal_Shdr *dynsymhdr;
1742 /* The shared libraries distributed with hpux11 have a bogus
1743 sh_link field for the ".dynamic" section. Find the
1744 string table for the ".dynsym" section instead. */
1745 if (elf_dynsymtab (abfd) != 0)
1747 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1748 hdr->sh_link = dynsymhdr->sh_link;
1752 unsigned int i, num_sec;
1754 num_sec = elf_numsections (abfd);
1755 for (i = 1; i < num_sec; i++)
1757 dynsymhdr = elf_elfsections (abfd)[i];
1758 if (dynsymhdr->sh_type == SHT_DYNSYM)
1760 hdr->sh_link = dynsymhdr->sh_link;
1768 case SHT_SYMTAB: /* A symbol table */
1769 if (elf_onesymtab (abfd) == shindex)
1772 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1773 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1774 elf_onesymtab (abfd) = shindex;
1775 elf_tdata (abfd)->symtab_hdr = *hdr;
1776 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1777 abfd->flags |= HAS_SYMS;
1779 /* Sometimes a shared object will map in the symbol table. If
1780 SHF_ALLOC is set, and this is a shared object, then we also
1781 treat this section as a BFD section. We can not base the
1782 decision purely on SHF_ALLOC, because that flag is sometimes
1783 set in a relocatable object file, which would confuse the
1785 if ((hdr->sh_flags & SHF_ALLOC) != 0
1786 && (abfd->flags & DYNAMIC) != 0
1787 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1791 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1792 can't read symbols without that section loaded as well. It
1793 is most likely specified by the next section header. */
1794 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1796 unsigned int i, num_sec;
1798 num_sec = elf_numsections (abfd);
1799 for (i = shindex + 1; i < num_sec; i++)
1801 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1802 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1803 && hdr2->sh_link == shindex)
1807 for (i = 1; i < shindex; i++)
1809 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1810 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1811 && hdr2->sh_link == shindex)
1815 return bfd_section_from_shdr (abfd, i);
1819 case SHT_DYNSYM: /* A dynamic symbol table */
1820 if (elf_dynsymtab (abfd) == shindex)
1823 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1824 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1825 elf_dynsymtab (abfd) = shindex;
1826 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1827 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1828 abfd->flags |= HAS_SYMS;
1830 /* Besides being a symbol table, we also treat this as a regular
1831 section, so that objcopy can handle it. */
1832 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1834 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1835 if (elf_symtab_shndx (abfd) == shindex)
1838 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1839 elf_symtab_shndx (abfd) = shindex;
1840 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1841 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1844 case SHT_STRTAB: /* A string table */
1845 if (hdr->bfd_section != NULL)
1847 if (ehdr->e_shstrndx == shindex)
1849 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1850 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1853 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1856 elf_tdata (abfd)->strtab_hdr = *hdr;
1857 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1860 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1863 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1864 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1865 elf_elfsections (abfd)[shindex] = hdr;
1866 /* We also treat this as a regular section, so that objcopy
1868 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1872 /* If the string table isn't one of the above, then treat it as a
1873 regular section. We need to scan all the headers to be sure,
1874 just in case this strtab section appeared before the above. */
1875 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1877 unsigned int i, num_sec;
1879 num_sec = elf_numsections (abfd);
1880 for (i = 1; i < num_sec; i++)
1882 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1883 if (hdr2->sh_link == shindex)
1885 if (! bfd_section_from_shdr (abfd, i))
1887 if (elf_onesymtab (abfd) == i)
1889 if (elf_dynsymtab (abfd) == i)
1890 goto dynsymtab_strtab;
1894 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1898 /* *These* do a lot of work -- but build no sections! */
1900 asection *target_sect;
1901 Elf_Internal_Shdr *hdr2;
1902 unsigned int num_sec = elf_numsections (abfd);
1904 /* Check for a bogus link to avoid crashing. */
1905 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1906 || hdr->sh_link >= num_sec)
1908 ((*_bfd_error_handler)
1909 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1910 abfd, hdr->sh_link, name, shindex));
1911 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1915 /* For some incomprehensible reason Oracle distributes
1916 libraries for Solaris in which some of the objects have
1917 bogus sh_link fields. It would be nice if we could just
1918 reject them, but, unfortunately, some people need to use
1919 them. We scan through the section headers; if we find only
1920 one suitable symbol table, we clobber the sh_link to point
1921 to it. I hope this doesn't break anything. */
1922 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1923 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1929 for (scan = 1; scan < num_sec; scan++)
1931 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1932 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1943 hdr->sh_link = found;
1946 /* Get the symbol table. */
1947 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1948 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
1949 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1952 /* If this reloc section does not use the main symbol table we
1953 don't treat it as a reloc section. BFD can't adequately
1954 represent such a section, so at least for now, we don't
1955 try. We just present it as a normal section. We also
1956 can't use it as a reloc section if it points to the null
1958 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF)
1959 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1962 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1964 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1965 if (target_sect == NULL)
1968 if ((target_sect->flags & SEC_RELOC) == 0
1969 || target_sect->reloc_count == 0)
1970 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1974 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1975 amt = sizeof (*hdr2);
1976 hdr2 = bfd_alloc (abfd, amt);
1977 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1980 elf_elfsections (abfd)[shindex] = hdr2;
1981 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1982 target_sect->flags |= SEC_RELOC;
1983 target_sect->relocation = NULL;
1984 target_sect->rel_filepos = hdr->sh_offset;
1985 /* In the section to which the relocations apply, mark whether
1986 its relocations are of the REL or RELA variety. */
1987 if (hdr->sh_size != 0)
1988 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
1989 abfd->flags |= HAS_RELOC;
1994 case SHT_GNU_verdef:
1995 elf_dynverdef (abfd) = shindex;
1996 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1997 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2000 case SHT_GNU_versym:
2001 elf_dynversym (abfd) = shindex;
2002 elf_tdata (abfd)->dynversym_hdr = *hdr;
2003 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2006 case SHT_GNU_verneed:
2007 elf_dynverref (abfd) = shindex;
2008 elf_tdata (abfd)->dynverref_hdr = *hdr;
2009 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2016 /* We need a BFD section for objcopy and relocatable linking,
2017 and it's handy to have the signature available as the section
2019 name = group_signature (abfd, hdr);
2022 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2024 if (hdr->contents != NULL)
2026 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
2027 unsigned int n_elt = hdr->sh_size / 4;
2030 if (idx->flags & GRP_COMDAT)
2031 hdr->bfd_section->flags
2032 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
2034 /* We try to keep the same section order as it comes in. */
2036 while (--n_elt != 0)
2037 if ((s = (--idx)->shdr->bfd_section) != NULL
2038 && elf_next_in_group (s) != NULL)
2040 elf_next_in_group (hdr->bfd_section) = s;
2047 /* Check for any processor-specific section types. */
2048 return bed->elf_backend_section_from_shdr (abfd, hdr, name,
2055 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2056 Return SEC for sections that have no elf section, and NULL on error. */
2059 bfd_section_from_r_symndx (bfd *abfd,
2060 struct sym_sec_cache *cache,
2062 unsigned long r_symndx)
2064 Elf_Internal_Shdr *symtab_hdr;
2065 unsigned char esym[sizeof (Elf64_External_Sym)];
2066 Elf_External_Sym_Shndx eshndx;
2067 Elf_Internal_Sym isym;
2068 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2070 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
2071 return cache->sec[ent];
2073 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2074 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2075 &isym, esym, &eshndx) == NULL)
2078 if (cache->abfd != abfd)
2080 memset (cache->indx, -1, sizeof (cache->indx));
2083 cache->indx[ent] = r_symndx;
2084 cache->sec[ent] = sec;
2085 if ((isym.st_shndx != SHN_UNDEF && isym.st_shndx < SHN_LORESERVE)
2086 || isym.st_shndx > SHN_HIRESERVE)
2089 s = bfd_section_from_elf_index (abfd, isym.st_shndx);
2091 cache->sec[ent] = s;
2093 return cache->sec[ent];
2096 /* Given an ELF section number, retrieve the corresponding BFD
2100 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
2102 if (index >= elf_numsections (abfd))
2104 return elf_elfsections (abfd)[index]->bfd_section;
2107 static struct bfd_elf_special_section const special_sections[] =
2109 { ".bss", 4, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2110 { ".gnu.linkonce.b",15, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2111 { ".comment", 8, 0, SHT_PROGBITS, 0 },
2112 { ".data", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2113 { ".data1", 6, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2114 { ".debug", 6, 0, SHT_PROGBITS, 0 },
2115 { ".fini", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2116 { ".init", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2117 { ".line", 5, 0, SHT_PROGBITS, 0 },
2118 { ".rodata", 7, -2, SHT_PROGBITS, SHF_ALLOC },
2119 { ".rodata1", 8, 0, SHT_PROGBITS, SHF_ALLOC },
2120 { ".tbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2121 { ".tdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2122 { ".text", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2123 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2124 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2125 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2126 { ".debug_line", 11, 0, SHT_PROGBITS, 0 },
2127 { ".debug_info", 11, 0, SHT_PROGBITS, 0 },
2128 { ".debug_abbrev", 13, 0, SHT_PROGBITS, 0 },
2129 { ".debug_aranges", 14, 0, SHT_PROGBITS, 0 },
2130 { ".dynamic", 8, 0, SHT_DYNAMIC, SHF_ALLOC },
2131 { ".dynstr", 7, 0, SHT_STRTAB, SHF_ALLOC },
2132 { ".dynsym", 7, 0, SHT_DYNSYM, SHF_ALLOC },
2133 { ".got", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2134 { ".hash", 5, 0, SHT_HASH, SHF_ALLOC },
2135 { ".interp", 7, 0, SHT_PROGBITS, 0 },
2136 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2137 { ".shstrtab", 9, 0, SHT_STRTAB, 0 },
2138 { ".strtab", 7, 0, SHT_STRTAB, 0 },
2139 { ".symtab", 7, 0, SHT_SYMTAB, 0 },
2140 { ".gnu.version", 12, 0, SHT_GNU_versym, 0 },
2141 { ".gnu.version_d", 14, 0, SHT_GNU_verdef, 0 },
2142 { ".gnu.version_r", 14, 0, SHT_GNU_verneed, 0 },
2143 { ".note.GNU-stack",15, 0, SHT_PROGBITS, 0 },
2144 { ".note", 5, -1, SHT_NOTE, 0 },
2145 { ".rela", 5, -1, SHT_RELA, 0 },
2146 { ".rel", 4, -1, SHT_REL, 0 },
2147 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2148 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2149 { ".gnu.conflict", 13, 0, SHT_RELA, SHF_ALLOC },
2150 { NULL, 0, 0, 0, 0 }
2153 static const struct bfd_elf_special_section *
2154 get_special_section (const char *name,
2155 const struct bfd_elf_special_section *special_sections,
2159 int len = strlen (name);
2161 for (i = 0; special_sections[i].prefix != NULL; i++)
2164 int prefix_len = special_sections[i].prefix_length;
2166 if (len < prefix_len)
2168 if (memcmp (name, special_sections[i].prefix, prefix_len) != 0)
2171 suffix_len = special_sections[i].suffix_length;
2172 if (suffix_len <= 0)
2174 if (name[prefix_len] != 0)
2176 if (suffix_len == 0)
2178 if (name[prefix_len] != '.'
2179 && (suffix_len == -2
2180 || (rela && special_sections[i].type == SHT_REL)))
2186 if (len < prefix_len + suffix_len)
2188 if (memcmp (name + len - suffix_len,
2189 special_sections[i].prefix + prefix_len,
2193 return &special_sections[i];
2199 const struct bfd_elf_special_section *
2200 _bfd_elf_get_sec_type_attr (bfd *abfd, const char *name)
2202 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2203 const struct bfd_elf_special_section *ssect = NULL;
2205 /* See if this is one of the special sections. */
2208 unsigned int rela = bed->default_use_rela_p;
2210 if (bed->special_sections)
2211 ssect = get_special_section (name, bed->special_sections, rela);
2214 ssect = get_special_section (name, special_sections, rela);
2221 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2223 struct bfd_elf_section_data *sdata;
2224 const struct bfd_elf_special_section *ssect;
2226 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2229 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2232 sec->used_by_bfd = sdata;
2235 elf_section_type (sec) = SHT_NULL;
2236 ssect = _bfd_elf_get_sec_type_attr (abfd, sec->name);
2239 elf_section_type (sec) = ssect->type;
2240 elf_section_flags (sec) = ssect->attr;
2243 /* Indicate whether or not this section should use RELA relocations. */
2244 sec->use_rela_p = get_elf_backend_data (abfd)->default_use_rela_p;
2249 /* Create a new bfd section from an ELF program header.
2251 Since program segments have no names, we generate a synthetic name
2252 of the form segment<NUM>, where NUM is generally the index in the
2253 program header table. For segments that are split (see below) we
2254 generate the names segment<NUM>a and segment<NUM>b.
2256 Note that some program segments may have a file size that is different than
2257 (less than) the memory size. All this means is that at execution the
2258 system must allocate the amount of memory specified by the memory size,
2259 but only initialize it with the first "file size" bytes read from the
2260 file. This would occur for example, with program segments consisting
2261 of combined data+bss.
2263 To handle the above situation, this routine generates TWO bfd sections
2264 for the single program segment. The first has the length specified by
2265 the file size of the segment, and the second has the length specified
2266 by the difference between the two sizes. In effect, the segment is split
2267 into it's initialized and uninitialized parts.
2272 _bfd_elf_make_section_from_phdr (bfd *abfd,
2273 Elf_Internal_Phdr *hdr,
2275 const char *typename)
2283 split = ((hdr->p_memsz > 0)
2284 && (hdr->p_filesz > 0)
2285 && (hdr->p_memsz > hdr->p_filesz));
2286 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2287 len = strlen (namebuf) + 1;
2288 name = bfd_alloc (abfd, len);
2291 memcpy (name, namebuf, len);
2292 newsect = bfd_make_section (abfd, name);
2293 if (newsect == NULL)
2295 newsect->vma = hdr->p_vaddr;
2296 newsect->lma = hdr->p_paddr;
2297 newsect->size = hdr->p_filesz;
2298 newsect->filepos = hdr->p_offset;
2299 newsect->flags |= SEC_HAS_CONTENTS;
2300 newsect->alignment_power = bfd_log2 (hdr->p_align);
2301 if (hdr->p_type == PT_LOAD)
2303 newsect->flags |= SEC_ALLOC;
2304 newsect->flags |= SEC_LOAD;
2305 if (hdr->p_flags & PF_X)
2307 /* FIXME: all we known is that it has execute PERMISSION,
2309 newsect->flags |= SEC_CODE;
2312 if (!(hdr->p_flags & PF_W))
2314 newsect->flags |= SEC_READONLY;
2319 sprintf (namebuf, "%s%db", typename, index);
2320 len = strlen (namebuf) + 1;
2321 name = bfd_alloc (abfd, len);
2324 memcpy (name, namebuf, len);
2325 newsect = bfd_make_section (abfd, name);
2326 if (newsect == NULL)
2328 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2329 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2330 newsect->size = hdr->p_memsz - hdr->p_filesz;
2331 if (hdr->p_type == PT_LOAD)
2333 newsect->flags |= SEC_ALLOC;
2334 if (hdr->p_flags & PF_X)
2335 newsect->flags |= SEC_CODE;
2337 if (!(hdr->p_flags & PF_W))
2338 newsect->flags |= SEC_READONLY;
2345 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2347 const struct elf_backend_data *bed;
2349 switch (hdr->p_type)
2352 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2355 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2358 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2361 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2364 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2366 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2371 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2374 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2376 case PT_GNU_EH_FRAME:
2377 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2381 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2384 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
2387 /* Check for any processor-specific program segment types. */
2388 bed = get_elf_backend_data (abfd);
2389 return bed->elf_backend_section_from_phdr (abfd, hdr, index, "proc");
2393 /* Initialize REL_HDR, the section-header for new section, containing
2394 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2395 relocations; otherwise, we use REL relocations. */
2398 _bfd_elf_init_reloc_shdr (bfd *abfd,
2399 Elf_Internal_Shdr *rel_hdr,
2401 bfd_boolean use_rela_p)
2404 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2405 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2407 name = bfd_alloc (abfd, amt);
2410 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2412 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2414 if (rel_hdr->sh_name == (unsigned int) -1)
2416 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2417 rel_hdr->sh_entsize = (use_rela_p
2418 ? bed->s->sizeof_rela
2419 : bed->s->sizeof_rel);
2420 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2421 rel_hdr->sh_flags = 0;
2422 rel_hdr->sh_addr = 0;
2423 rel_hdr->sh_size = 0;
2424 rel_hdr->sh_offset = 0;
2429 /* Set up an ELF internal section header for a section. */
2432 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2434 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2435 bfd_boolean *failedptr = failedptrarg;
2436 Elf_Internal_Shdr *this_hdr;
2440 /* We already failed; just get out of the bfd_map_over_sections
2445 this_hdr = &elf_section_data (asect)->this_hdr;
2447 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2448 asect->name, FALSE);
2449 if (this_hdr->sh_name == (unsigned int) -1)
2455 this_hdr->sh_flags = 0;
2457 if ((asect->flags & SEC_ALLOC) != 0
2458 || asect->user_set_vma)
2459 this_hdr->sh_addr = asect->vma;
2461 this_hdr->sh_addr = 0;
2463 this_hdr->sh_offset = 0;
2464 this_hdr->sh_size = asect->size;
2465 this_hdr->sh_link = 0;
2466 this_hdr->sh_addralign = 1 << asect->alignment_power;
2467 /* The sh_entsize and sh_info fields may have been set already by
2468 copy_private_section_data. */
2470 this_hdr->bfd_section = asect;
2471 this_hdr->contents = NULL;
2473 /* If the section type is unspecified, we set it based on
2475 if (this_hdr->sh_type == SHT_NULL)
2477 if ((asect->flags & SEC_GROUP) != 0)
2479 /* We also need to mark SHF_GROUP here for relocatable
2481 struct bfd_link_order *l;
2484 for (l = asect->link_order_head; l != NULL; l = l->next)
2485 if (l->type == bfd_indirect_link_order
2486 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2489 /* The name is not important. Anything will do. */
2490 elf_group_name (elt->output_section) = "G";
2491 elf_section_flags (elt->output_section) |= SHF_GROUP;
2493 elt = elf_next_in_group (elt);
2494 /* During a relocatable link, the lists are
2497 while (elt != elf_next_in_group (l->u.indirect.section));
2499 this_hdr->sh_type = SHT_GROUP;
2501 else if ((asect->flags & SEC_ALLOC) != 0
2502 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2503 || (asect->flags & SEC_NEVER_LOAD) != 0))
2504 this_hdr->sh_type = SHT_NOBITS;
2506 this_hdr->sh_type = SHT_PROGBITS;
2509 switch (this_hdr->sh_type)
2515 case SHT_INIT_ARRAY:
2516 case SHT_FINI_ARRAY:
2517 case SHT_PREINIT_ARRAY:
2524 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2528 this_hdr->sh_entsize = bed->s->sizeof_sym;
2532 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2536 if (get_elf_backend_data (abfd)->may_use_rela_p)
2537 this_hdr->sh_entsize = bed->s->sizeof_rela;
2541 if (get_elf_backend_data (abfd)->may_use_rel_p)
2542 this_hdr->sh_entsize = bed->s->sizeof_rel;
2545 case SHT_GNU_versym:
2546 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2549 case SHT_GNU_verdef:
2550 this_hdr->sh_entsize = 0;
2551 /* objcopy or strip will copy over sh_info, but may not set
2552 cverdefs. The linker will set cverdefs, but sh_info will be
2554 if (this_hdr->sh_info == 0)
2555 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2557 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2558 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2561 case SHT_GNU_verneed:
2562 this_hdr->sh_entsize = 0;
2563 /* objcopy or strip will copy over sh_info, but may not set
2564 cverrefs. The linker will set cverrefs, but sh_info will be
2566 if (this_hdr->sh_info == 0)
2567 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2569 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2570 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2574 this_hdr->sh_entsize = 4;
2578 if ((asect->flags & SEC_ALLOC) != 0)
2579 this_hdr->sh_flags |= SHF_ALLOC;
2580 if ((asect->flags & SEC_READONLY) == 0)
2581 this_hdr->sh_flags |= SHF_WRITE;
2582 if ((asect->flags & SEC_CODE) != 0)
2583 this_hdr->sh_flags |= SHF_EXECINSTR;
2584 if ((asect->flags & SEC_MERGE) != 0)
2586 this_hdr->sh_flags |= SHF_MERGE;
2587 this_hdr->sh_entsize = asect->entsize;
2588 if ((asect->flags & SEC_STRINGS) != 0)
2589 this_hdr->sh_flags |= SHF_STRINGS;
2591 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2592 this_hdr->sh_flags |= SHF_GROUP;
2593 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2595 this_hdr->sh_flags |= SHF_TLS;
2596 if (asect->size == 0 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2598 struct bfd_link_order *o;
2600 this_hdr->sh_size = 0;
2601 for (o = asect->link_order_head; o != NULL; o = o->next)
2602 if (this_hdr->sh_size < o->offset + o->size)
2603 this_hdr->sh_size = o->offset + o->size;
2604 if (this_hdr->sh_size)
2605 this_hdr->sh_type = SHT_NOBITS;
2609 /* Check for processor-specific section types. */
2610 if (bed->elf_backend_fake_sections
2611 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2614 /* If the section has relocs, set up a section header for the
2615 SHT_REL[A] section. If two relocation sections are required for
2616 this section, it is up to the processor-specific back-end to
2617 create the other. */
2618 if ((asect->flags & SEC_RELOC) != 0
2619 && !_bfd_elf_init_reloc_shdr (abfd,
2620 &elf_section_data (asect)->rel_hdr,
2626 /* Fill in the contents of a SHT_GROUP section. */
2629 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2631 bfd_boolean *failedptr = failedptrarg;
2632 unsigned long symindx;
2633 asection *elt, *first;
2635 struct bfd_link_order *l;
2638 /* Ignore linker created group section. See elfNN_ia64_object_p in
2640 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2645 if (elf_group_id (sec) != NULL)
2646 symindx = elf_group_id (sec)->udata.i;
2650 /* If called from the assembler, swap_out_syms will have set up
2651 elf_section_syms; If called for "ld -r", use target_index. */
2652 if (elf_section_syms (abfd) != NULL)
2653 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2655 symindx = sec->target_index;
2657 elf_section_data (sec)->this_hdr.sh_info = symindx;
2659 /* The contents won't be allocated for "ld -r" or objcopy. */
2661 if (sec->contents == NULL)
2664 sec->contents = bfd_alloc (abfd, sec->size);
2666 /* Arrange for the section to be written out. */
2667 elf_section_data (sec)->this_hdr.contents = sec->contents;
2668 if (sec->contents == NULL)
2675 loc = sec->contents + sec->size;
2677 /* Get the pointer to the first section in the group that gas
2678 squirreled away here. objcopy arranges for this to be set to the
2679 start of the input section group. */
2680 first = elt = elf_next_in_group (sec);
2682 /* First element is a flag word. Rest of section is elf section
2683 indices for all the sections of the group. Write them backwards
2684 just to keep the group in the same order as given in .section
2685 directives, not that it matters. */
2694 s = s->output_section;
2697 idx = elf_section_data (s)->this_idx;
2698 H_PUT_32 (abfd, idx, loc);
2699 elt = elf_next_in_group (elt);
2704 /* If this is a relocatable link, then the above did nothing because
2705 SEC is the output section. Look through the input sections
2707 for (l = sec->link_order_head; l != NULL; l = l->next)
2708 if (l->type == bfd_indirect_link_order
2709 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2714 elf_section_data (elt->output_section)->this_idx, loc);
2715 elt = elf_next_in_group (elt);
2716 /* During a relocatable link, the lists are circular. */
2718 while (elt != elf_next_in_group (l->u.indirect.section));
2720 if ((loc -= 4) != sec->contents)
2723 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2726 /* Assign all ELF section numbers. The dummy first section is handled here
2727 too. The link/info pointers for the standard section types are filled
2728 in here too, while we're at it. */
2731 assign_section_numbers (bfd *abfd)
2733 struct elf_obj_tdata *t = elf_tdata (abfd);
2735 unsigned int section_number, secn;
2736 Elf_Internal_Shdr **i_shdrp;
2738 struct bfd_elf_section_data *d;
2742 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2744 /* Put SHT_GROUP sections first. */
2745 for (sec = abfd->sections; sec; sec = sec->next)
2747 d = elf_section_data (sec);
2749 if (d->this_hdr.sh_type == SHT_GROUP)
2751 if (section_number == SHN_LORESERVE)
2752 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2753 d->this_idx = section_number++;
2757 for (sec = abfd->sections; sec; sec = sec->next)
2759 d = elf_section_data (sec);
2761 if (d->this_hdr.sh_type != SHT_GROUP)
2763 if (section_number == SHN_LORESERVE)
2764 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2765 d->this_idx = section_number++;
2767 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2768 if ((sec->flags & SEC_RELOC) == 0)
2772 if (section_number == SHN_LORESERVE)
2773 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2774 d->rel_idx = section_number++;
2775 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2780 if (section_number == SHN_LORESERVE)
2781 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2782 d->rel_idx2 = section_number++;
2783 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2789 if (section_number == SHN_LORESERVE)
2790 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2791 t->shstrtab_section = section_number++;
2792 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2793 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2795 if (bfd_get_symcount (abfd) > 0)
2797 if (section_number == SHN_LORESERVE)
2798 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2799 t->symtab_section = section_number++;
2800 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2801 if (section_number > SHN_LORESERVE - 2)
2803 if (section_number == SHN_LORESERVE)
2804 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2805 t->symtab_shndx_section = section_number++;
2806 t->symtab_shndx_hdr.sh_name
2807 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2808 ".symtab_shndx", FALSE);
2809 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2812 if (section_number == SHN_LORESERVE)
2813 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2814 t->strtab_section = section_number++;
2815 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2818 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2819 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2821 elf_numsections (abfd) = section_number;
2822 elf_elfheader (abfd)->e_shnum = section_number;
2823 if (section_number > SHN_LORESERVE)
2824 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2826 /* Set up the list of section header pointers, in agreement with the
2828 amt = section_number * sizeof (Elf_Internal_Shdr *);
2829 i_shdrp = bfd_zalloc (abfd, amt);
2830 if (i_shdrp == NULL)
2833 amt = sizeof (Elf_Internal_Shdr);
2834 i_shdrp[0] = bfd_zalloc (abfd, amt);
2835 if (i_shdrp[0] == NULL)
2837 bfd_release (abfd, i_shdrp);
2841 elf_elfsections (abfd) = i_shdrp;
2843 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2844 if (bfd_get_symcount (abfd) > 0)
2846 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2847 if (elf_numsections (abfd) > SHN_LORESERVE)
2849 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2850 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2852 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2853 t->symtab_hdr.sh_link = t->strtab_section;
2856 for (sec = abfd->sections; sec; sec = sec->next)
2858 struct bfd_elf_section_data *d = elf_section_data (sec);
2862 i_shdrp[d->this_idx] = &d->this_hdr;
2863 if (d->rel_idx != 0)
2864 i_shdrp[d->rel_idx] = &d->rel_hdr;
2865 if (d->rel_idx2 != 0)
2866 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2868 /* Fill in the sh_link and sh_info fields while we're at it. */
2870 /* sh_link of a reloc section is the section index of the symbol
2871 table. sh_info is the section index of the section to which
2872 the relocation entries apply. */
2873 if (d->rel_idx != 0)
2875 d->rel_hdr.sh_link = t->symtab_section;
2876 d->rel_hdr.sh_info = d->this_idx;
2878 if (d->rel_idx2 != 0)
2880 d->rel_hdr2->sh_link = t->symtab_section;
2881 d->rel_hdr2->sh_info = d->this_idx;
2884 /* We need to set up sh_link for SHF_LINK_ORDER. */
2885 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
2887 s = elf_linked_to_section (sec);
2889 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2892 struct bfd_link_order *p;
2894 /* Find out what the corresponding section in output
2896 for (p = sec->link_order_head; p != NULL; p = p->next)
2898 s = p->u.indirect.section;
2899 if (p->type == bfd_indirect_link_order
2900 && (bfd_get_flavour (s->owner)
2901 == bfd_target_elf_flavour))
2903 Elf_Internal_Shdr ** const elf_shdrp
2904 = elf_elfsections (s->owner);
2906 = _bfd_elf_section_from_bfd_section (s->owner, s);
2907 elfsec = elf_shdrp[elfsec]->sh_link;
2909 The Intel C compiler generates SHT_IA_64_UNWIND with
2910 SHF_LINK_ORDER. But it doesn't set theh sh_link or
2911 sh_info fields. Hence we could get the situation
2912 where elfsec is 0. */
2915 const struct elf_backend_data *bed
2916 = get_elf_backend_data (abfd);
2917 if (bed->link_order_error_handler)
2918 bed->link_order_error_handler
2919 (_("%B: warning: sh_link not set for section `%A'"),
2924 s = elf_shdrp[elfsec]->bfd_section;
2925 if (elf_discarded_section (s))
2928 (*_bfd_error_handler)
2929 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
2930 abfd, d->this_hdr.bfd_section,
2932 /* Point to the kept section if it has
2933 the same size as the discarded
2935 kept = _bfd_elf_check_kept_section (s);
2938 bfd_set_error (bfd_error_bad_value);
2943 s = s->output_section;
2944 BFD_ASSERT (s != NULL);
2945 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2953 switch (d->this_hdr.sh_type)
2957 /* A reloc section which we are treating as a normal BFD
2958 section. sh_link is the section index of the symbol
2959 table. sh_info is the section index of the section to
2960 which the relocation entries apply. We assume that an
2961 allocated reloc section uses the dynamic symbol table.
2962 FIXME: How can we be sure? */
2963 s = bfd_get_section_by_name (abfd, ".dynsym");
2965 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2967 /* We look up the section the relocs apply to by name. */
2969 if (d->this_hdr.sh_type == SHT_REL)
2973 s = bfd_get_section_by_name (abfd, name);
2975 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2979 /* We assume that a section named .stab*str is a stabs
2980 string section. We look for a section with the same name
2981 but without the trailing ``str'', and set its sh_link
2982 field to point to this section. */
2983 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
2984 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2989 len = strlen (sec->name);
2990 alc = bfd_malloc (len - 2);
2993 memcpy (alc, sec->name, len - 3);
2994 alc[len - 3] = '\0';
2995 s = bfd_get_section_by_name (abfd, alc);
2999 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3001 /* This is a .stab section. */
3002 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3003 elf_section_data (s)->this_hdr.sh_entsize
3004 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3011 case SHT_GNU_verneed:
3012 case SHT_GNU_verdef:
3013 /* sh_link is the section header index of the string table
3014 used for the dynamic entries, or the symbol table, or the
3016 s = bfd_get_section_by_name (abfd, ".dynstr");
3018 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3021 case SHT_GNU_LIBLIST:
3022 /* sh_link is the section header index of the prelink library
3024 used for the dynamic entries, or the symbol table, or the
3026 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3027 ? ".dynstr" : ".gnu.libstr");
3029 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3033 case SHT_GNU_versym:
3034 /* sh_link is the section header index of the symbol table
3035 this hash table or version table is for. */
3036 s = bfd_get_section_by_name (abfd, ".dynsym");
3038 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3042 d->this_hdr.sh_link = t->symtab_section;
3046 for (secn = 1; secn < section_number; ++secn)
3047 if (i_shdrp[secn] == NULL)
3048 i_shdrp[secn] = i_shdrp[0];
3050 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3051 i_shdrp[secn]->sh_name);
3055 /* Map symbol from it's internal number to the external number, moving
3056 all local symbols to be at the head of the list. */
3059 sym_is_global (bfd *abfd, asymbol *sym)
3061 /* If the backend has a special mapping, use it. */
3062 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3063 if (bed->elf_backend_sym_is_global)
3064 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3066 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3067 || bfd_is_und_section (bfd_get_section (sym))
3068 || bfd_is_com_section (bfd_get_section (sym)));
3072 elf_map_symbols (bfd *abfd)
3074 unsigned int symcount = bfd_get_symcount (abfd);
3075 asymbol **syms = bfd_get_outsymbols (abfd);
3076 asymbol **sect_syms;
3077 unsigned int num_locals = 0;
3078 unsigned int num_globals = 0;
3079 unsigned int num_locals2 = 0;
3080 unsigned int num_globals2 = 0;
3088 fprintf (stderr, "elf_map_symbols\n");
3092 for (asect = abfd->sections; asect; asect = asect->next)
3094 if (max_index < asect->index)
3095 max_index = asect->index;
3099 amt = max_index * sizeof (asymbol *);
3100 sect_syms = bfd_zalloc (abfd, amt);
3101 if (sect_syms == NULL)
3103 elf_section_syms (abfd) = sect_syms;
3104 elf_num_section_syms (abfd) = max_index;
3106 /* Init sect_syms entries for any section symbols we have already
3107 decided to output. */
3108 for (idx = 0; idx < symcount; idx++)
3110 asymbol *sym = syms[idx];
3112 if ((sym->flags & BSF_SECTION_SYM) != 0
3119 if (sec->owner != NULL)
3121 if (sec->owner != abfd)
3123 if (sec->output_offset != 0)
3126 sec = sec->output_section;
3128 /* Empty sections in the input files may have had a
3129 section symbol created for them. (See the comment
3130 near the end of _bfd_generic_link_output_symbols in
3131 linker.c). If the linker script discards such
3132 sections then we will reach this point. Since we know
3133 that we cannot avoid this case, we detect it and skip
3134 the abort and the assignment to the sect_syms array.
3135 To reproduce this particular case try running the
3136 linker testsuite test ld-scripts/weak.exp for an ELF
3137 port that uses the generic linker. */
3138 if (sec->owner == NULL)
3141 BFD_ASSERT (sec->owner == abfd);
3143 sect_syms[sec->index] = syms[idx];
3148 /* Classify all of the symbols. */
3149 for (idx = 0; idx < symcount; idx++)
3151 if (!sym_is_global (abfd, syms[idx]))
3157 /* We will be adding a section symbol for each BFD section. Most normal
3158 sections will already have a section symbol in outsymbols, but
3159 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3160 at least in that case. */
3161 for (asect = abfd->sections; asect; asect = asect->next)
3163 if (sect_syms[asect->index] == NULL)
3165 if (!sym_is_global (abfd, asect->symbol))
3172 /* Now sort the symbols so the local symbols are first. */
3173 amt = (num_locals + num_globals) * sizeof (asymbol *);
3174 new_syms = bfd_alloc (abfd, amt);
3176 if (new_syms == NULL)
3179 for (idx = 0; idx < symcount; idx++)
3181 asymbol *sym = syms[idx];
3184 if (!sym_is_global (abfd, sym))
3187 i = num_locals + num_globals2++;
3189 sym->udata.i = i + 1;
3191 for (asect = abfd->sections; asect; asect = asect->next)
3193 if (sect_syms[asect->index] == NULL)
3195 asymbol *sym = asect->symbol;
3198 sect_syms[asect->index] = sym;
3199 if (!sym_is_global (abfd, sym))
3202 i = num_locals + num_globals2++;
3204 sym->udata.i = i + 1;
3208 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3210 elf_num_locals (abfd) = num_locals;
3211 elf_num_globals (abfd) = num_globals;
3215 /* Align to the maximum file alignment that could be required for any
3216 ELF data structure. */
3218 static inline file_ptr
3219 align_file_position (file_ptr off, int align)
3221 return (off + align - 1) & ~(align - 1);
3224 /* Assign a file position to a section, optionally aligning to the
3225 required section alignment. */
3228 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3236 al = i_shdrp->sh_addralign;
3238 offset = BFD_ALIGN (offset, al);
3240 i_shdrp->sh_offset = offset;
3241 if (i_shdrp->bfd_section != NULL)
3242 i_shdrp->bfd_section->filepos = offset;
3243 if (i_shdrp->sh_type != SHT_NOBITS)
3244 offset += i_shdrp->sh_size;
3248 /* Compute the file positions we are going to put the sections at, and
3249 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3250 is not NULL, this is being called by the ELF backend linker. */
3253 _bfd_elf_compute_section_file_positions (bfd *abfd,
3254 struct bfd_link_info *link_info)
3256 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3258 struct bfd_strtab_hash *strtab = NULL;
3259 Elf_Internal_Shdr *shstrtab_hdr;
3261 if (abfd->output_has_begun)
3264 /* Do any elf backend specific processing first. */
3265 if (bed->elf_backend_begin_write_processing)
3266 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3268 if (! prep_headers (abfd))
3271 /* Post process the headers if necessary. */
3272 if (bed->elf_backend_post_process_headers)
3273 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3276 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3280 if (!assign_section_numbers (abfd))
3283 /* The backend linker builds symbol table information itself. */
3284 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3286 /* Non-zero if doing a relocatable link. */
3287 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3289 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3293 if (link_info == NULL)
3295 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3300 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3301 /* sh_name was set in prep_headers. */
3302 shstrtab_hdr->sh_type = SHT_STRTAB;
3303 shstrtab_hdr->sh_flags = 0;
3304 shstrtab_hdr->sh_addr = 0;
3305 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3306 shstrtab_hdr->sh_entsize = 0;
3307 shstrtab_hdr->sh_link = 0;
3308 shstrtab_hdr->sh_info = 0;
3309 /* sh_offset is set in assign_file_positions_except_relocs. */
3310 shstrtab_hdr->sh_addralign = 1;
3312 if (!assign_file_positions_except_relocs (abfd, link_info))
3315 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3318 Elf_Internal_Shdr *hdr;
3320 off = elf_tdata (abfd)->next_file_pos;
3322 hdr = &elf_tdata (abfd)->symtab_hdr;
3323 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3325 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3326 if (hdr->sh_size != 0)
3327 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3329 hdr = &elf_tdata (abfd)->strtab_hdr;
3330 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3332 elf_tdata (abfd)->next_file_pos = off;
3334 /* Now that we know where the .strtab section goes, write it
3336 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3337 || ! _bfd_stringtab_emit (abfd, strtab))
3339 _bfd_stringtab_free (strtab);
3342 abfd->output_has_begun = TRUE;
3347 /* Create a mapping from a set of sections to a program segment. */
3349 static struct elf_segment_map *
3350 make_mapping (bfd *abfd,
3351 asection **sections,
3356 struct elf_segment_map *m;
3361 amt = sizeof (struct elf_segment_map);
3362 amt += (to - from - 1) * sizeof (asection *);
3363 m = bfd_zalloc (abfd, amt);
3367 m->p_type = PT_LOAD;
3368 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3369 m->sections[i - from] = *hdrpp;
3370 m->count = to - from;
3372 if (from == 0 && phdr)
3374 /* Include the headers in the first PT_LOAD segment. */
3375 m->includes_filehdr = 1;
3376 m->includes_phdrs = 1;
3382 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3385 struct elf_segment_map *
3386 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3388 struct elf_segment_map *m;
3390 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3394 m->p_type = PT_DYNAMIC;
3396 m->sections[0] = dynsec;
3401 /* Set up a mapping from BFD sections to program segments. */
3404 map_sections_to_segments (bfd *abfd)
3406 asection **sections = NULL;
3410 struct elf_segment_map *mfirst;
3411 struct elf_segment_map **pm;
3412 struct elf_segment_map *m;
3415 unsigned int phdr_index;
3416 bfd_vma maxpagesize;
3418 bfd_boolean phdr_in_segment = TRUE;
3419 bfd_boolean writable;
3421 asection *first_tls = NULL;
3422 asection *dynsec, *eh_frame_hdr;
3425 if (elf_tdata (abfd)->segment_map != NULL)
3428 if (bfd_count_sections (abfd) == 0)
3431 /* Select the allocated sections, and sort them. */
3433 amt = bfd_count_sections (abfd) * sizeof (asection *);
3434 sections = bfd_malloc (amt);
3435 if (sections == NULL)
3439 for (s = abfd->sections; s != NULL; s = s->next)
3441 if ((s->flags & SEC_ALLOC) != 0)
3447 BFD_ASSERT (i <= bfd_count_sections (abfd));
3450 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3452 /* Build the mapping. */
3457 /* If we have a .interp section, then create a PT_PHDR segment for
3458 the program headers and a PT_INTERP segment for the .interp
3460 s = bfd_get_section_by_name (abfd, ".interp");
3461 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3463 amt = sizeof (struct elf_segment_map);
3464 m = bfd_zalloc (abfd, amt);
3468 m->p_type = PT_PHDR;
3469 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3470 m->p_flags = PF_R | PF_X;
3471 m->p_flags_valid = 1;
3472 m->includes_phdrs = 1;
3477 amt = sizeof (struct elf_segment_map);
3478 m = bfd_zalloc (abfd, amt);
3482 m->p_type = PT_INTERP;
3490 /* Look through the sections. We put sections in the same program
3491 segment when the start of the second section can be placed within
3492 a few bytes of the end of the first section. */
3496 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3498 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3500 && (dynsec->flags & SEC_LOAD) == 0)
3503 /* Deal with -Ttext or something similar such that the first section
3504 is not adjacent to the program headers. This is an
3505 approximation, since at this point we don't know exactly how many
3506 program headers we will need. */
3509 bfd_size_type phdr_size;
3511 phdr_size = elf_tdata (abfd)->program_header_size;
3513 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3514 if ((abfd->flags & D_PAGED) == 0
3515 || sections[0]->lma < phdr_size
3516 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3517 phdr_in_segment = FALSE;
3520 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3523 bfd_boolean new_segment;
3527 /* See if this section and the last one will fit in the same
3530 if (last_hdr == NULL)
3532 /* If we don't have a segment yet, then we don't need a new
3533 one (we build the last one after this loop). */
3534 new_segment = FALSE;
3536 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3538 /* If this section has a different relation between the
3539 virtual address and the load address, then we need a new
3543 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3544 < BFD_ALIGN (hdr->lma, maxpagesize))
3546 /* If putting this section in this segment would force us to
3547 skip a page in the segment, then we need a new segment. */
3550 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3551 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3553 /* We don't want to put a loadable section after a
3554 nonloadable section in the same segment.
3555 Consider .tbss sections as loadable for this purpose. */
3558 else if ((abfd->flags & D_PAGED) == 0)
3560 /* If the file is not demand paged, which means that we
3561 don't require the sections to be correctly aligned in the
3562 file, then there is no other reason for a new segment. */
3563 new_segment = FALSE;
3566 && (hdr->flags & SEC_READONLY) == 0
3567 && (((last_hdr->lma + last_size - 1)
3568 & ~(maxpagesize - 1))
3569 != (hdr->lma & ~(maxpagesize - 1))))
3571 /* We don't want to put a writable section in a read only
3572 segment, unless they are on the same page in memory
3573 anyhow. We already know that the last section does not
3574 bring us past the current section on the page, so the
3575 only case in which the new section is not on the same
3576 page as the previous section is when the previous section
3577 ends precisely on a page boundary. */
3582 /* Otherwise, we can use the same segment. */
3583 new_segment = FALSE;
3588 if ((hdr->flags & SEC_READONLY) == 0)
3591 /* .tbss sections effectively have zero size. */
3592 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3593 last_size = hdr->size;
3599 /* We need a new program segment. We must create a new program
3600 header holding all the sections from phdr_index until hdr. */
3602 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3609 if ((hdr->flags & SEC_READONLY) == 0)
3615 /* .tbss sections effectively have zero size. */
3616 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3617 last_size = hdr->size;
3621 phdr_in_segment = FALSE;
3624 /* Create a final PT_LOAD program segment. */
3625 if (last_hdr != NULL)
3627 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3635 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3638 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3645 /* For each loadable .note section, add a PT_NOTE segment. We don't
3646 use bfd_get_section_by_name, because if we link together
3647 nonloadable .note sections and loadable .note sections, we will
3648 generate two .note sections in the output file. FIXME: Using
3649 names for section types is bogus anyhow. */
3650 for (s = abfd->sections; s != NULL; s = s->next)
3652 if ((s->flags & SEC_LOAD) != 0
3653 && strncmp (s->name, ".note", 5) == 0)
3655 amt = sizeof (struct elf_segment_map);
3656 m = bfd_zalloc (abfd, amt);
3660 m->p_type = PT_NOTE;
3667 if (s->flags & SEC_THREAD_LOCAL)
3675 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3680 amt = sizeof (struct elf_segment_map);
3681 amt += (tls_count - 1) * sizeof (asection *);
3682 m = bfd_zalloc (abfd, amt);
3687 m->count = tls_count;
3688 /* Mandated PF_R. */
3690 m->p_flags_valid = 1;
3691 for (i = 0; i < tls_count; ++i)
3693 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3694 m->sections[i] = first_tls;
3695 first_tls = first_tls->next;
3702 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3704 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3705 if (eh_frame_hdr != NULL
3706 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3708 amt = sizeof (struct elf_segment_map);
3709 m = bfd_zalloc (abfd, amt);
3713 m->p_type = PT_GNU_EH_FRAME;
3715 m->sections[0] = eh_frame_hdr->output_section;
3721 if (elf_tdata (abfd)->stack_flags)
3723 amt = sizeof (struct elf_segment_map);
3724 m = bfd_zalloc (abfd, amt);
3728 m->p_type = PT_GNU_STACK;
3729 m->p_flags = elf_tdata (abfd)->stack_flags;
3730 m->p_flags_valid = 1;
3736 if (elf_tdata (abfd)->relro)
3738 amt = sizeof (struct elf_segment_map);
3739 m = bfd_zalloc (abfd, amt);
3743 m->p_type = PT_GNU_RELRO;
3745 m->p_flags_valid = 1;
3754 elf_tdata (abfd)->segment_map = mfirst;
3758 if (sections != NULL)
3763 /* Sort sections by address. */
3766 elf_sort_sections (const void *arg1, const void *arg2)
3768 const asection *sec1 = *(const asection **) arg1;
3769 const asection *sec2 = *(const asection **) arg2;
3770 bfd_size_type size1, size2;
3772 /* Sort by LMA first, since this is the address used to
3773 place the section into a segment. */
3774 if (sec1->lma < sec2->lma)
3776 else if (sec1->lma > sec2->lma)
3779 /* Then sort by VMA. Normally the LMA and the VMA will be
3780 the same, and this will do nothing. */
3781 if (sec1->vma < sec2->vma)
3783 else if (sec1->vma > sec2->vma)
3786 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3788 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3794 /* If the indicies are the same, do not return 0
3795 here, but continue to try the next comparison. */
3796 if (sec1->target_index - sec2->target_index != 0)
3797 return sec1->target_index - sec2->target_index;
3802 else if (TOEND (sec2))
3807 /* Sort by size, to put zero sized sections
3808 before others at the same address. */
3810 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
3811 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
3818 return sec1->target_index - sec2->target_index;
3821 /* Ian Lance Taylor writes:
3823 We shouldn't be using % with a negative signed number. That's just
3824 not good. We have to make sure either that the number is not
3825 negative, or that the number has an unsigned type. When the types
3826 are all the same size they wind up as unsigned. When file_ptr is a
3827 larger signed type, the arithmetic winds up as signed long long,
3830 What we're trying to say here is something like ``increase OFF by
3831 the least amount that will cause it to be equal to the VMA modulo
3833 /* In other words, something like:
3835 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3836 off_offset = off % bed->maxpagesize;
3837 if (vma_offset < off_offset)
3838 adjustment = vma_offset + bed->maxpagesize - off_offset;
3840 adjustment = vma_offset - off_offset;
3842 which can can be collapsed into the expression below. */
3845 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
3847 return ((vma - off) % maxpagesize);
3850 /* Assign file positions to the sections based on the mapping from
3851 sections to segments. This function also sets up some fields in
3852 the file header, and writes out the program headers. */
3855 assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
3857 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3859 struct elf_segment_map *m;
3861 Elf_Internal_Phdr *phdrs;
3863 bfd_vma filehdr_vaddr, filehdr_paddr;
3864 bfd_vma phdrs_vaddr, phdrs_paddr;
3865 Elf_Internal_Phdr *p;
3868 if (elf_tdata (abfd)->segment_map == NULL)
3870 if (! map_sections_to_segments (abfd))
3875 /* The placement algorithm assumes that non allocated sections are
3876 not in PT_LOAD segments. We ensure this here by removing such
3877 sections from the segment map. */
3878 for (m = elf_tdata (abfd)->segment_map;
3882 unsigned int new_count;
3885 if (m->p_type != PT_LOAD)
3889 for (i = 0; i < m->count; i ++)
3891 if ((m->sections[i]->flags & SEC_ALLOC) != 0)
3894 m->sections[new_count] = m->sections[i];
3900 if (new_count != m->count)
3901 m->count = new_count;
3905 if (bed->elf_backend_modify_segment_map)
3907 if (! (*bed->elf_backend_modify_segment_map) (abfd, link_info))
3912 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3915 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
3916 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
3917 elf_elfheader (abfd)->e_phnum = count;
3921 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
3925 /* If we already counted the number of program segments, make sure
3926 that we allocated enough space. This happens when SIZEOF_HEADERS
3927 is used in a linker script. */
3928 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
3929 if (alloc != 0 && count > alloc)
3931 ((*_bfd_error_handler)
3932 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
3933 abfd, alloc, count));
3934 bfd_set_error (bfd_error_bad_value);
3941 amt = alloc * sizeof (Elf_Internal_Phdr);
3942 phdrs = bfd_alloc (abfd, amt);
3946 off = bed->s->sizeof_ehdr;
3947 off += alloc * bed->s->sizeof_phdr;
3954 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
3961 /* If elf_segment_map is not from map_sections_to_segments, the
3962 sections may not be correctly ordered. NOTE: sorting should
3963 not be done to the PT_NOTE section of a corefile, which may
3964 contain several pseudo-sections artificially created by bfd.
3965 Sorting these pseudo-sections breaks things badly. */
3967 && !(elf_elfheader (abfd)->e_type == ET_CORE
3968 && m->p_type == PT_NOTE))
3969 qsort (m->sections, (size_t) m->count, sizeof (asection *),
3972 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
3973 number of sections with contents contributing to both p_filesz
3974 and p_memsz, followed by a number of sections with no contents
3975 that just contribute to p_memsz. In this loop, OFF tracks next
3976 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
3977 an adjustment we use for segments that have no file contents
3978 but need zero filled memory allocation. */
3980 p->p_type = m->p_type;
3981 p->p_flags = m->p_flags;
3983 if (p->p_type == PT_LOAD
3986 bfd_size_type align;
3989 if ((abfd->flags & D_PAGED) != 0)
3990 align = bed->maxpagesize;
3993 unsigned int align_power = 0;
3994 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3996 unsigned int secalign;
3998 secalign = bfd_get_section_alignment (abfd, *secpp);
3999 if (secalign > align_power)
4000 align_power = secalign;
4002 align = (bfd_size_type) 1 << align_power;
4005 adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4008 && !m->includes_filehdr
4009 && !m->includes_phdrs
4010 && (ufile_ptr) off >= align)
4012 /* If the first section isn't loadable, the same holds for
4013 any other sections. Since the segment won't need file
4014 space, we can make p_offset overlap some prior segment.
4015 However, .tbss is special. If a segment starts with
4016 .tbss, we need to look at the next section to decide
4017 whether the segment has any loadable sections. */
4019 while ((m->sections[i]->flags & SEC_LOAD) == 0)
4021 if ((m->sections[i]->flags & SEC_THREAD_LOCAL) == 0
4025 voff = adjust - align;
4031 /* Make sure the .dynamic section is the first section in the
4032 PT_DYNAMIC segment. */
4033 else if (p->p_type == PT_DYNAMIC
4035 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4038 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4040 bfd_set_error (bfd_error_bad_value);
4047 p->p_vaddr = m->sections[0]->vma;
4049 if (m->p_paddr_valid)
4050 p->p_paddr = m->p_paddr;
4051 else if (m->count == 0)
4054 p->p_paddr = m->sections[0]->lma;
4056 if (p->p_type == PT_LOAD
4057 && (abfd->flags & D_PAGED) != 0)
4058 p->p_align = bed->maxpagesize;
4059 else if (m->count == 0)
4060 p->p_align = 1 << bed->s->log_file_align;
4068 if (m->includes_filehdr)
4070 if (! m->p_flags_valid)
4073 p->p_filesz = bed->s->sizeof_ehdr;
4074 p->p_memsz = bed->s->sizeof_ehdr;
4077 BFD_ASSERT (p->p_type == PT_LOAD);
4079 if (p->p_vaddr < (bfd_vma) off)
4081 (*_bfd_error_handler)
4082 (_("%B: Not enough room for program headers, try linking with -N"),
4084 bfd_set_error (bfd_error_bad_value);
4089 if (! m->p_paddr_valid)
4092 if (p->p_type == PT_LOAD)
4094 filehdr_vaddr = p->p_vaddr;
4095 filehdr_paddr = p->p_paddr;
4099 if (m->includes_phdrs)
4101 if (! m->p_flags_valid)
4104 if (m->includes_filehdr)
4106 if (p->p_type == PT_LOAD)
4108 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
4109 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
4114 p->p_offset = bed->s->sizeof_ehdr;
4118 BFD_ASSERT (p->p_type == PT_LOAD);
4119 p->p_vaddr -= off - p->p_offset;
4120 if (! m->p_paddr_valid)
4121 p->p_paddr -= off - p->p_offset;
4124 if (p->p_type == PT_LOAD)
4126 phdrs_vaddr = p->p_vaddr;
4127 phdrs_paddr = p->p_paddr;
4130 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4133 p->p_filesz += alloc * bed->s->sizeof_phdr;
4134 p->p_memsz += alloc * bed->s->sizeof_phdr;
4137 if (p->p_type == PT_LOAD
4138 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4140 if (! m->includes_filehdr && ! m->includes_phdrs)
4141 p->p_offset = off + voff;
4146 adjust = off - (p->p_offset + p->p_filesz);
4147 p->p_filesz += adjust;
4148 p->p_memsz += adjust;
4152 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4156 bfd_size_type align;
4160 align = 1 << bfd_get_section_alignment (abfd, sec);
4162 if (p->p_type == PT_LOAD
4163 || p->p_type == PT_TLS)
4165 bfd_signed_vma adjust;
4167 if ((flags & SEC_LOAD) != 0)
4169 adjust = sec->lma - (p->p_paddr + p->p_filesz);
4172 (*_bfd_error_handler)
4173 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4174 abfd, sec, (unsigned long) sec->lma);
4178 p->p_filesz += adjust;
4179 p->p_memsz += adjust;
4181 /* .tbss is special. It doesn't contribute to p_memsz of
4183 else if ((flags & SEC_THREAD_LOCAL) == 0
4184 || p->p_type == PT_TLS)
4186 /* The section VMA must equal the file position
4187 modulo the page size. */
4188 bfd_size_type page = align;
4189 if ((abfd->flags & D_PAGED) != 0)
4190 page = bed->maxpagesize;
4191 adjust = vma_page_aligned_bias (sec->vma,
4192 p->p_vaddr + p->p_memsz,
4194 p->p_memsz += adjust;
4198 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4200 /* The section at i == 0 is the one that actually contains
4206 p->p_filesz = sec->size;
4212 /* The rest are fake sections that shouldn't be written. */
4221 if (p->p_type == PT_LOAD)
4224 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4225 1997, and the exact reason for it isn't clear. One
4226 plausible explanation is that it is to work around
4227 a problem we have with linker scripts using data
4228 statements in NOLOAD sections. I don't think it
4229 makes a great deal of sense to have such a section
4230 assigned to a PT_LOAD segment, but apparently
4231 people do this. The data statement results in a
4232 bfd_data_link_order being built, and these need
4233 section contents to write into. Eventually, we get
4234 to _bfd_elf_write_object_contents which writes any
4235 section with contents to the output. Make room
4236 here for the write, so that following segments are
4238 if ((flags & SEC_LOAD) != 0
4239 || (flags & SEC_HAS_CONTENTS) != 0)
4243 if ((flags & SEC_LOAD) != 0)
4245 p->p_filesz += sec->size;
4246 p->p_memsz += sec->size;
4248 /* PR ld/594: Sections in note segments which are not loaded
4249 contribute to the file size but not the in-memory size. */
4250 else if (p->p_type == PT_NOTE
4251 && (flags & SEC_HAS_CONTENTS) != 0)
4252 p->p_filesz += sec->size;
4254 /* .tbss is special. It doesn't contribute to p_memsz of
4256 else if ((flags & SEC_THREAD_LOCAL) == 0
4257 || p->p_type == PT_TLS)
4258 p->p_memsz += sec->size;
4260 if (p->p_type == PT_TLS
4262 && (sec->flags & SEC_HAS_CONTENTS) == 0)
4264 struct bfd_link_order *o;
4265 bfd_vma tbss_size = 0;
4267 for (o = sec->link_order_head; o != NULL; o = o->next)
4268 if (tbss_size < o->offset + o->size)
4269 tbss_size = o->offset + o->size;
4271 p->p_memsz += tbss_size;
4274 if (align > p->p_align
4275 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
4279 if (! m->p_flags_valid)
4282 if ((flags & SEC_CODE) != 0)
4284 if ((flags & SEC_READONLY) == 0)
4290 /* Now that we have set the section file positions, we can set up
4291 the file positions for the non PT_LOAD segments. */
4292 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4296 if (p->p_type != PT_LOAD && m->count > 0)
4298 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
4299 /* If the section has not yet been assigned a file position,
4300 do so now. The ARM BPABI requires that .dynamic section
4301 not be marked SEC_ALLOC because it is not part of any
4302 PT_LOAD segment, so it will not be processed above. */
4303 if (p->p_type == PT_DYNAMIC && m->sections[0]->filepos == 0)
4306 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4309 while (i_shdrpp[i]->bfd_section != m->sections[0])
4311 off = (_bfd_elf_assign_file_position_for_section
4312 (i_shdrpp[i], off, TRUE));
4313 p->p_filesz = m->sections[0]->size;
4315 p->p_offset = m->sections[0]->filepos;
4319 if (m->includes_filehdr)
4321 p->p_vaddr = filehdr_vaddr;
4322 if (! m->p_paddr_valid)
4323 p->p_paddr = filehdr_paddr;
4325 else if (m->includes_phdrs)
4327 p->p_vaddr = phdrs_vaddr;
4328 if (! m->p_paddr_valid)
4329 p->p_paddr = phdrs_paddr;
4331 else if (p->p_type == PT_GNU_RELRO)
4333 Elf_Internal_Phdr *lp;
4335 for (lp = phdrs; lp < phdrs + count; ++lp)
4337 if (lp->p_type == PT_LOAD
4338 && lp->p_vaddr <= link_info->relro_end
4339 && lp->p_vaddr >= link_info->relro_start
4340 && lp->p_vaddr + lp->p_filesz
4341 >= link_info->relro_end)
4345 if (lp < phdrs + count
4346 && link_info->relro_end > lp->p_vaddr)
4348 p->p_vaddr = lp->p_vaddr;
4349 p->p_paddr = lp->p_paddr;
4350 p->p_offset = lp->p_offset;
4351 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4352 p->p_memsz = p->p_filesz;
4354 p->p_flags = (lp->p_flags & ~PF_W);
4358 memset (p, 0, sizeof *p);
4359 p->p_type = PT_NULL;
4365 /* Clear out any program headers we allocated but did not use. */
4366 for (; count < alloc; count++, p++)
4368 memset (p, 0, sizeof *p);
4369 p->p_type = PT_NULL;
4372 elf_tdata (abfd)->phdr = phdrs;
4374 elf_tdata (abfd)->next_file_pos = off;
4376 /* Write out the program headers. */
4377 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4378 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
4384 /* Get the size of the program header.
4386 If this is called by the linker before any of the section VMA's are set, it
4387 can't calculate the correct value for a strange memory layout. This only
4388 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4389 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4390 data segment (exclusive of .interp and .dynamic).
4392 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4393 will be two segments. */
4395 static bfd_size_type
4396 get_program_header_size (bfd *abfd)
4400 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4402 /* We can't return a different result each time we're called. */
4403 if (elf_tdata (abfd)->program_header_size != 0)
4404 return elf_tdata (abfd)->program_header_size;
4406 if (elf_tdata (abfd)->segment_map != NULL)
4408 struct elf_segment_map *m;
4411 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4413 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4414 return elf_tdata (abfd)->program_header_size;
4417 /* Assume we will need exactly two PT_LOAD segments: one for text
4418 and one for data. */
4421 s = bfd_get_section_by_name (abfd, ".interp");
4422 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4424 /* If we have a loadable interpreter section, we need a
4425 PT_INTERP segment. In this case, assume we also need a
4426 PT_PHDR segment, although that may not be true for all
4431 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4433 /* We need a PT_DYNAMIC segment. */
4437 if (elf_tdata (abfd)->eh_frame_hdr)
4439 /* We need a PT_GNU_EH_FRAME segment. */
4443 if (elf_tdata (abfd)->stack_flags)
4445 /* We need a PT_GNU_STACK segment. */
4449 if (elf_tdata (abfd)->relro)
4451 /* We need a PT_GNU_RELRO segment. */
4455 for (s = abfd->sections; s != NULL; s = s->next)
4457 if ((s->flags & SEC_LOAD) != 0
4458 && strncmp (s->name, ".note", 5) == 0)
4460 /* We need a PT_NOTE segment. */
4465 for (s = abfd->sections; s != NULL; s = s->next)
4467 if (s->flags & SEC_THREAD_LOCAL)
4469 /* We need a PT_TLS segment. */
4475 /* Let the backend count up any program headers it might need. */
4476 if (bed->elf_backend_additional_program_headers)
4480 a = (*bed->elf_backend_additional_program_headers) (abfd);
4486 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4487 return elf_tdata (abfd)->program_header_size;
4490 /* Work out the file positions of all the sections. This is called by
4491 _bfd_elf_compute_section_file_positions. All the section sizes and
4492 VMAs must be known before this is called.
4494 Reloc sections come in two flavours: Those processed specially as
4495 "side-channel" data attached to a section to which they apply, and
4496 those that bfd doesn't process as relocations. The latter sort are
4497 stored in a normal bfd section by bfd_section_from_shdr. We don't
4498 consider the former sort here, unless they form part of the loadable
4499 image. Reloc sections not assigned here will be handled later by
4500 assign_file_positions_for_relocs.
4502 We also don't set the positions of the .symtab and .strtab here. */
4505 assign_file_positions_except_relocs (bfd *abfd,
4506 struct bfd_link_info *link_info)
4508 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4509 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4510 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4511 unsigned int num_sec = elf_numsections (abfd);
4513 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4515 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4516 && bfd_get_format (abfd) != bfd_core)
4518 Elf_Internal_Shdr **hdrpp;
4521 /* Start after the ELF header. */
4522 off = i_ehdrp->e_ehsize;
4524 /* We are not creating an executable, which means that we are
4525 not creating a program header, and that the actual order of
4526 the sections in the file is unimportant. */
4527 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4529 Elf_Internal_Shdr *hdr;
4532 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4533 && hdr->bfd_section == NULL)
4534 || i == tdata->symtab_section
4535 || i == tdata->symtab_shndx_section
4536 || i == tdata->strtab_section)
4538 hdr->sh_offset = -1;
4541 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4543 if (i == SHN_LORESERVE - 1)
4545 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4546 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4553 Elf_Internal_Shdr **hdrpp;
4555 /* Assign file positions for the loaded sections based on the
4556 assignment of sections to segments. */
4557 if (! assign_file_positions_for_segments (abfd, link_info))
4560 /* Assign file positions for the other sections. */
4562 off = elf_tdata (abfd)->next_file_pos;
4563 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4565 Elf_Internal_Shdr *hdr;
4568 if (hdr->bfd_section != NULL
4569 && hdr->bfd_section->filepos != 0)
4570 hdr->sh_offset = hdr->bfd_section->filepos;
4571 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4573 ((*_bfd_error_handler)
4574 (_("%B: warning: allocated section `%s' not in segment"),
4576 (hdr->bfd_section == NULL
4578 : hdr->bfd_section->name)));
4579 if ((abfd->flags & D_PAGED) != 0)
4580 off += vma_page_aligned_bias (hdr->sh_addr, off,
4583 off += vma_page_aligned_bias (hdr->sh_addr, off,
4585 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4588 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4589 && hdr->bfd_section == NULL)
4590 || hdr == i_shdrpp[tdata->symtab_section]
4591 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4592 || hdr == i_shdrpp[tdata->strtab_section])
4593 hdr->sh_offset = -1;
4595 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4597 if (i == SHN_LORESERVE - 1)
4599 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4600 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4605 /* Place the section headers. */
4606 off = align_file_position (off, 1 << bed->s->log_file_align);
4607 i_ehdrp->e_shoff = off;
4608 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4610 elf_tdata (abfd)->next_file_pos = off;
4616 prep_headers (bfd *abfd)
4618 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4619 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4620 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4621 struct elf_strtab_hash *shstrtab;
4622 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4624 i_ehdrp = elf_elfheader (abfd);
4625 i_shdrp = elf_elfsections (abfd);
4627 shstrtab = _bfd_elf_strtab_init ();
4628 if (shstrtab == NULL)
4631 elf_shstrtab (abfd) = shstrtab;
4633 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4634 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4635 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4636 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4638 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4639 i_ehdrp->e_ident[EI_DATA] =
4640 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4641 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4643 if ((abfd->flags & DYNAMIC) != 0)
4644 i_ehdrp->e_type = ET_DYN;
4645 else if ((abfd->flags & EXEC_P) != 0)
4646 i_ehdrp->e_type = ET_EXEC;
4647 else if (bfd_get_format (abfd) == bfd_core)
4648 i_ehdrp->e_type = ET_CORE;
4650 i_ehdrp->e_type = ET_REL;
4652 switch (bfd_get_arch (abfd))
4654 case bfd_arch_unknown:
4655 i_ehdrp->e_machine = EM_NONE;
4658 /* There used to be a long list of cases here, each one setting
4659 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4660 in the corresponding bfd definition. To avoid duplication,
4661 the switch was removed. Machines that need special handling
4662 can generally do it in elf_backend_final_write_processing(),
4663 unless they need the information earlier than the final write.
4664 Such need can generally be supplied by replacing the tests for
4665 e_machine with the conditions used to determine it. */
4667 i_ehdrp->e_machine = bed->elf_machine_code;
4670 i_ehdrp->e_version = bed->s->ev_current;
4671 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4673 /* No program header, for now. */
4674 i_ehdrp->e_phoff = 0;
4675 i_ehdrp->e_phentsize = 0;
4676 i_ehdrp->e_phnum = 0;
4678 /* Each bfd section is section header entry. */
4679 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4680 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4682 /* If we're building an executable, we'll need a program header table. */
4683 if (abfd->flags & EXEC_P)
4684 /* It all happens later. */
4688 i_ehdrp->e_phentsize = 0;
4690 i_ehdrp->e_phoff = 0;
4693 elf_tdata (abfd)->symtab_hdr.sh_name =
4694 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4695 elf_tdata (abfd)->strtab_hdr.sh_name =
4696 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4697 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4698 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4699 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4700 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4701 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4707 /* Assign file positions for all the reloc sections which are not part
4708 of the loadable file image. */
4711 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4714 unsigned int i, num_sec;
4715 Elf_Internal_Shdr **shdrpp;
4717 off = elf_tdata (abfd)->next_file_pos;
4719 num_sec = elf_numsections (abfd);
4720 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4722 Elf_Internal_Shdr *shdrp;
4725 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4726 && shdrp->sh_offset == -1)
4727 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4730 elf_tdata (abfd)->next_file_pos = off;
4734 _bfd_elf_write_object_contents (bfd *abfd)
4736 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4737 Elf_Internal_Ehdr *i_ehdrp;
4738 Elf_Internal_Shdr **i_shdrp;
4740 unsigned int count, num_sec;
4742 if (! abfd->output_has_begun
4743 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4746 i_shdrp = elf_elfsections (abfd);
4747 i_ehdrp = elf_elfheader (abfd);
4750 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4754 _bfd_elf_assign_file_positions_for_relocs (abfd);
4756 /* After writing the headers, we need to write the sections too... */
4757 num_sec = elf_numsections (abfd);
4758 for (count = 1; count < num_sec; count++)
4760 if (bed->elf_backend_section_processing)
4761 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4762 if (i_shdrp[count]->contents)
4764 bfd_size_type amt = i_shdrp[count]->sh_size;
4766 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4767 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4770 if (count == SHN_LORESERVE - 1)
4771 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4774 /* Write out the section header names. */
4775 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4776 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd)))
4779 if (bed->elf_backend_final_write_processing)
4780 (*bed->elf_backend_final_write_processing) (abfd,
4781 elf_tdata (abfd)->linker);
4783 return bed->s->write_shdrs_and_ehdr (abfd);
4787 _bfd_elf_write_corefile_contents (bfd *abfd)
4789 /* Hopefully this can be done just like an object file. */
4790 return _bfd_elf_write_object_contents (abfd);
4793 /* Given a section, search the header to find them. */
4796 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4798 const struct elf_backend_data *bed;
4801 if (elf_section_data (asect) != NULL
4802 && elf_section_data (asect)->this_idx != 0)
4803 return elf_section_data (asect)->this_idx;
4805 if (bfd_is_abs_section (asect))
4807 else if (bfd_is_com_section (asect))
4809 else if (bfd_is_und_section (asect))
4814 bed = get_elf_backend_data (abfd);
4815 if (bed->elf_backend_section_from_bfd_section)
4819 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4824 bfd_set_error (bfd_error_nonrepresentable_section);
4829 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4833 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
4835 asymbol *asym_ptr = *asym_ptr_ptr;
4837 flagword flags = asym_ptr->flags;
4839 /* When gas creates relocations against local labels, it creates its
4840 own symbol for the section, but does put the symbol into the
4841 symbol chain, so udata is 0. When the linker is generating
4842 relocatable output, this section symbol may be for one of the
4843 input sections rather than the output section. */
4844 if (asym_ptr->udata.i == 0
4845 && (flags & BSF_SECTION_SYM)
4846 && asym_ptr->section)
4850 if (asym_ptr->section->output_section != NULL)
4851 indx = asym_ptr->section->output_section->index;
4853 indx = asym_ptr->section->index;
4854 if (indx < elf_num_section_syms (abfd)
4855 && elf_section_syms (abfd)[indx] != NULL)
4856 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
4859 idx = asym_ptr->udata.i;
4863 /* This case can occur when using --strip-symbol on a symbol
4864 which is used in a relocation entry. */
4865 (*_bfd_error_handler)
4866 (_("%B: symbol `%s' required but not present"),
4867 abfd, bfd_asymbol_name (asym_ptr));
4868 bfd_set_error (bfd_error_no_symbols);
4875 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4876 (long) asym_ptr, asym_ptr->name, idx, flags,
4877 elf_symbol_flags (flags));
4885 /* Copy private BFD data. This copies any program header information. */
4888 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4890 Elf_Internal_Ehdr *iehdr;
4891 struct elf_segment_map *map;
4892 struct elf_segment_map *map_first;
4893 struct elf_segment_map **pointer_to_map;
4894 Elf_Internal_Phdr *segment;
4897 unsigned int num_segments;
4898 bfd_boolean phdr_included = FALSE;
4899 bfd_vma maxpagesize;
4900 struct elf_segment_map *phdr_adjust_seg = NULL;
4901 unsigned int phdr_adjust_num = 0;
4902 const struct elf_backend_data *bed;
4904 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4905 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4908 if (elf_tdata (ibfd)->phdr == NULL)
4911 bed = get_elf_backend_data (ibfd);
4912 iehdr = elf_elfheader (ibfd);
4915 pointer_to_map = &map_first;
4917 num_segments = elf_elfheader (ibfd)->e_phnum;
4918 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
4920 /* Returns the end address of the segment + 1. */
4921 #define SEGMENT_END(segment, start) \
4922 (start + (segment->p_memsz > segment->p_filesz \
4923 ? segment->p_memsz : segment->p_filesz))
4925 #define SECTION_SIZE(section, segment) \
4926 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4927 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4928 ? section->size : 0)
4930 /* Returns TRUE if the given section is contained within
4931 the given segment. VMA addresses are compared. */
4932 #define IS_CONTAINED_BY_VMA(section, segment) \
4933 (section->vma >= segment->p_vaddr \
4934 && (section->vma + SECTION_SIZE (section, segment) \
4935 <= (SEGMENT_END (segment, segment->p_vaddr))))
4937 /* Returns TRUE if the given section is contained within
4938 the given segment. LMA addresses are compared. */
4939 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4940 (section->lma >= base \
4941 && (section->lma + SECTION_SIZE (section, segment) \
4942 <= SEGMENT_END (segment, base)))
4944 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4945 #define IS_COREFILE_NOTE(p, s) \
4946 (p->p_type == PT_NOTE \
4947 && bfd_get_format (ibfd) == bfd_core \
4948 && s->vma == 0 && s->lma == 0 \
4949 && (bfd_vma) s->filepos >= p->p_offset \
4950 && ((bfd_vma) s->filepos + s->size \
4951 <= p->p_offset + p->p_filesz))
4953 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4954 linker, which generates a PT_INTERP section with p_vaddr and
4955 p_memsz set to 0. */
4956 #define IS_SOLARIS_PT_INTERP(p, s) \
4958 && p->p_paddr == 0 \
4959 && p->p_memsz == 0 \
4960 && p->p_filesz > 0 \
4961 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4963 && (bfd_vma) s->filepos >= p->p_offset \
4964 && ((bfd_vma) s->filepos + s->size \
4965 <= p->p_offset + p->p_filesz))
4967 /* Decide if the given section should be included in the given segment.
4968 A section will be included if:
4969 1. It is within the address space of the segment -- we use the LMA
4970 if that is set for the segment and the VMA otherwise,
4971 2. It is an allocated segment,
4972 3. There is an output section associated with it,
4973 4. The section has not already been allocated to a previous segment.
4974 5. PT_GNU_STACK segments do not include any sections.
4975 6. PT_TLS segment includes only SHF_TLS sections.
4976 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
4977 8. PT_DYNAMIC should not contain empty sections at the beginning
4978 (with the possible exception of .dynamic). */
4979 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4980 ((((segment->p_paddr \
4981 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4982 : IS_CONTAINED_BY_VMA (section, segment)) \
4983 && (section->flags & SEC_ALLOC) != 0) \
4984 || IS_COREFILE_NOTE (segment, section)) \
4985 && section->output_section != NULL \
4986 && segment->p_type != PT_GNU_STACK \
4987 && (segment->p_type != PT_TLS \
4988 || (section->flags & SEC_THREAD_LOCAL)) \
4989 && (segment->p_type == PT_LOAD \
4990 || segment->p_type == PT_TLS \
4991 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4992 && (segment->p_type != PT_DYNAMIC \
4993 || SECTION_SIZE (section, segment) > 0 \
4994 || (segment->p_paddr \
4995 ? segment->p_paddr != section->lma \
4996 : segment->p_vaddr != section->vma) \
4997 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
4999 && ! section->segment_mark)
5001 /* Returns TRUE iff seg1 starts after the end of seg2. */
5002 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5003 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5005 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5006 their VMA address ranges and their LMA address ranges overlap.
5007 It is possible to have overlapping VMA ranges without overlapping LMA
5008 ranges. RedBoot images for example can have both .data and .bss mapped
5009 to the same VMA range, but with the .data section mapped to a different
5011 #define SEGMENT_OVERLAPS(seg1, seg2) \
5012 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5013 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5014 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5015 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5017 /* Initialise the segment mark field. */
5018 for (section = ibfd->sections; section != NULL; section = section->next)
5019 section->segment_mark = FALSE;
5021 /* Scan through the segments specified in the program header
5022 of the input BFD. For this first scan we look for overlaps
5023 in the loadable segments. These can be created by weird
5024 parameters to objcopy. Also, fix some solaris weirdness. */
5025 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5030 Elf_Internal_Phdr *segment2;
5032 if (segment->p_type == PT_INTERP)
5033 for (section = ibfd->sections; section; section = section->next)
5034 if (IS_SOLARIS_PT_INTERP (segment, section))
5036 /* Mininal change so that the normal section to segment
5037 assignment code will work. */
5038 segment->p_vaddr = section->vma;
5042 if (segment->p_type != PT_LOAD)
5045 /* Determine if this segment overlaps any previous segments. */
5046 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
5048 bfd_signed_vma extra_length;
5050 if (segment2->p_type != PT_LOAD
5051 || ! SEGMENT_OVERLAPS (segment, segment2))
5054 /* Merge the two segments together. */
5055 if (segment2->p_vaddr < segment->p_vaddr)
5057 /* Extend SEGMENT2 to include SEGMENT and then delete
5060 SEGMENT_END (segment, segment->p_vaddr)
5061 - SEGMENT_END (segment2, segment2->p_vaddr);
5063 if (extra_length > 0)
5065 segment2->p_memsz += extra_length;
5066 segment2->p_filesz += extra_length;
5069 segment->p_type = PT_NULL;
5071 /* Since we have deleted P we must restart the outer loop. */
5073 segment = elf_tdata (ibfd)->phdr;
5078 /* Extend SEGMENT to include SEGMENT2 and then delete
5081 SEGMENT_END (segment2, segment2->p_vaddr)
5082 - SEGMENT_END (segment, segment->p_vaddr);
5084 if (extra_length > 0)
5086 segment->p_memsz += extra_length;
5087 segment->p_filesz += extra_length;
5090 segment2->p_type = PT_NULL;
5095 /* The second scan attempts to assign sections to segments. */
5096 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5100 unsigned int section_count;
5101 asection ** sections;
5102 asection * output_section;
5104 bfd_vma matching_lma;
5105 bfd_vma suggested_lma;
5109 if (segment->p_type == PT_NULL)
5112 /* Compute how many sections might be placed into this segment. */
5113 for (section = ibfd->sections, section_count = 0;
5115 section = section->next)
5116 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5119 /* Allocate a segment map big enough to contain
5120 all of the sections we have selected. */
5121 amt = sizeof (struct elf_segment_map);
5122 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5123 map = bfd_alloc (obfd, amt);
5127 /* Initialise the fields of the segment map. Default to
5128 using the physical address of the segment in the input BFD. */
5130 map->p_type = segment->p_type;
5131 map->p_flags = segment->p_flags;
5132 map->p_flags_valid = 1;
5133 map->p_paddr = segment->p_paddr;
5134 map->p_paddr_valid = 1;
5136 /* Determine if this segment contains the ELF file header
5137 and if it contains the program headers themselves. */
5138 map->includes_filehdr = (segment->p_offset == 0
5139 && segment->p_filesz >= iehdr->e_ehsize);
5141 map->includes_phdrs = 0;
5143 if (! phdr_included || segment->p_type != PT_LOAD)
5145 map->includes_phdrs =
5146 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5147 && (segment->p_offset + segment->p_filesz
5148 >= ((bfd_vma) iehdr->e_phoff
5149 + iehdr->e_phnum * iehdr->e_phentsize)));
5151 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5152 phdr_included = TRUE;
5155 if (section_count == 0)
5157 /* Special segments, such as the PT_PHDR segment, may contain
5158 no sections, but ordinary, loadable segments should contain
5159 something. They are allowed by the ELF spec however, so only
5160 a warning is produced. */
5161 if (segment->p_type == PT_LOAD)
5162 (*_bfd_error_handler)
5163 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5167 *pointer_to_map = map;
5168 pointer_to_map = &map->next;
5173 /* Now scan the sections in the input BFD again and attempt
5174 to add their corresponding output sections to the segment map.
5175 The problem here is how to handle an output section which has
5176 been moved (ie had its LMA changed). There are four possibilities:
5178 1. None of the sections have been moved.
5179 In this case we can continue to use the segment LMA from the
5182 2. All of the sections have been moved by the same amount.
5183 In this case we can change the segment's LMA to match the LMA
5184 of the first section.
5186 3. Some of the sections have been moved, others have not.
5187 In this case those sections which have not been moved can be
5188 placed in the current segment which will have to have its size,
5189 and possibly its LMA changed, and a new segment or segments will
5190 have to be created to contain the other sections.
5192 4. The sections have been moved, but not by the same amount.
5193 In this case we can change the segment's LMA to match the LMA
5194 of the first section and we will have to create a new segment
5195 or segments to contain the other sections.
5197 In order to save time, we allocate an array to hold the section
5198 pointers that we are interested in. As these sections get assigned
5199 to a segment, they are removed from this array. */
5201 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5202 to work around this long long bug. */
5203 amt = section_count * sizeof (asection *);
5204 sections = bfd_malloc (amt);
5205 if (sections == NULL)
5208 /* Step One: Scan for segment vs section LMA conflicts.
5209 Also add the sections to the section array allocated above.
5210 Also add the sections to the current segment. In the common
5211 case, where the sections have not been moved, this means that
5212 we have completely filled the segment, and there is nothing
5218 for (j = 0, section = ibfd->sections;
5220 section = section->next)
5222 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5224 output_section = section->output_section;
5226 sections[j ++] = section;
5228 /* The Solaris native linker always sets p_paddr to 0.
5229 We try to catch that case here, and set it to the
5230 correct value. Note - some backends require that
5231 p_paddr be left as zero. */
5232 if (segment->p_paddr == 0
5233 && segment->p_vaddr != 0
5234 && (! bed->want_p_paddr_set_to_zero)
5236 && output_section->lma != 0
5237 && (output_section->vma == (segment->p_vaddr
5238 + (map->includes_filehdr
5241 + (map->includes_phdrs
5243 * iehdr->e_phentsize)
5245 map->p_paddr = segment->p_vaddr;
5247 /* Match up the physical address of the segment with the
5248 LMA address of the output section. */
5249 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5250 || IS_COREFILE_NOTE (segment, section)
5251 || (bed->want_p_paddr_set_to_zero &&
5252 IS_CONTAINED_BY_VMA (output_section, segment))
5255 if (matching_lma == 0)
5256 matching_lma = output_section->lma;
5258 /* We assume that if the section fits within the segment
5259 then it does not overlap any other section within that
5261 map->sections[isec ++] = output_section;
5263 else if (suggested_lma == 0)
5264 suggested_lma = output_section->lma;
5268 BFD_ASSERT (j == section_count);
5270 /* Step Two: Adjust the physical address of the current segment,
5272 if (isec == section_count)
5274 /* All of the sections fitted within the segment as currently
5275 specified. This is the default case. Add the segment to
5276 the list of built segments and carry on to process the next
5277 program header in the input BFD. */
5278 map->count = section_count;
5279 *pointer_to_map = map;
5280 pointer_to_map = &map->next;
5287 if (matching_lma != 0)
5289 /* At least one section fits inside the current segment.
5290 Keep it, but modify its physical address to match the
5291 LMA of the first section that fitted. */
5292 map->p_paddr = matching_lma;
5296 /* None of the sections fitted inside the current segment.
5297 Change the current segment's physical address to match
5298 the LMA of the first section. */
5299 map->p_paddr = suggested_lma;
5302 /* Offset the segment physical address from the lma
5303 to allow for space taken up by elf headers. */
5304 if (map->includes_filehdr)
5305 map->p_paddr -= iehdr->e_ehsize;
5307 if (map->includes_phdrs)
5309 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5311 /* iehdr->e_phnum is just an estimate of the number
5312 of program headers that we will need. Make a note
5313 here of the number we used and the segment we chose
5314 to hold these headers, so that we can adjust the
5315 offset when we know the correct value. */
5316 phdr_adjust_num = iehdr->e_phnum;
5317 phdr_adjust_seg = map;
5321 /* Step Three: Loop over the sections again, this time assigning
5322 those that fit to the current segment and removing them from the
5323 sections array; but making sure not to leave large gaps. Once all
5324 possible sections have been assigned to the current segment it is
5325 added to the list of built segments and if sections still remain
5326 to be assigned, a new segment is constructed before repeating
5334 /* Fill the current segment with sections that fit. */
5335 for (j = 0; j < section_count; j++)
5337 section = sections[j];
5339 if (section == NULL)
5342 output_section = section->output_section;
5344 BFD_ASSERT (output_section != NULL);
5346 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5347 || IS_COREFILE_NOTE (segment, section))
5349 if (map->count == 0)
5351 /* If the first section in a segment does not start at
5352 the beginning of the segment, then something is
5354 if (output_section->lma !=
5356 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5357 + (map->includes_phdrs
5358 ? iehdr->e_phnum * iehdr->e_phentsize
5364 asection * prev_sec;
5366 prev_sec = map->sections[map->count - 1];
5368 /* If the gap between the end of the previous section
5369 and the start of this section is more than
5370 maxpagesize then we need to start a new segment. */
5371 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5373 < BFD_ALIGN (output_section->lma, maxpagesize))
5374 || ((prev_sec->lma + prev_sec->size)
5375 > output_section->lma))
5377 if (suggested_lma == 0)
5378 suggested_lma = output_section->lma;
5384 map->sections[map->count++] = output_section;
5387 section->segment_mark = TRUE;
5389 else if (suggested_lma == 0)
5390 suggested_lma = output_section->lma;
5393 BFD_ASSERT (map->count > 0);
5395 /* Add the current segment to the list of built segments. */
5396 *pointer_to_map = map;
5397 pointer_to_map = &map->next;
5399 if (isec < section_count)
5401 /* We still have not allocated all of the sections to
5402 segments. Create a new segment here, initialise it
5403 and carry on looping. */
5404 amt = sizeof (struct elf_segment_map);
5405 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5406 map = bfd_alloc (obfd, amt);
5413 /* Initialise the fields of the segment map. Set the physical
5414 physical address to the LMA of the first section that has
5415 not yet been assigned. */
5417 map->p_type = segment->p_type;
5418 map->p_flags = segment->p_flags;
5419 map->p_flags_valid = 1;
5420 map->p_paddr = suggested_lma;
5421 map->p_paddr_valid = 1;
5422 map->includes_filehdr = 0;
5423 map->includes_phdrs = 0;
5426 while (isec < section_count);
5431 /* The Solaris linker creates program headers in which all the
5432 p_paddr fields are zero. When we try to objcopy or strip such a
5433 file, we get confused. Check for this case, and if we find it
5434 reset the p_paddr_valid fields. */
5435 for (map = map_first; map != NULL; map = map->next)
5436 if (map->p_paddr != 0)
5439 for (map = map_first; map != NULL; map = map->next)
5440 map->p_paddr_valid = 0;
5442 elf_tdata (obfd)->segment_map = map_first;
5444 /* If we had to estimate the number of program headers that were
5445 going to be needed, then check our estimate now and adjust
5446 the offset if necessary. */
5447 if (phdr_adjust_seg != NULL)
5451 for (count = 0, map = map_first; map != NULL; map = map->next)
5454 if (count > phdr_adjust_num)
5455 phdr_adjust_seg->p_paddr
5456 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5461 #undef IS_CONTAINED_BY_VMA
5462 #undef IS_CONTAINED_BY_LMA
5463 #undef IS_COREFILE_NOTE
5464 #undef IS_SOLARIS_PT_INTERP
5465 #undef INCLUDE_SECTION_IN_SEGMENT
5466 #undef SEGMENT_AFTER_SEGMENT
5467 #undef SEGMENT_OVERLAPS
5471 /* Copy private section information. This copies over the entsize
5472 field, and sometimes the info field. */
5475 _bfd_elf_copy_private_section_data (bfd *ibfd,
5480 Elf_Internal_Shdr *ihdr, *ohdr;
5482 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5483 || obfd->xvec->flavour != bfd_target_elf_flavour)
5486 ihdr = &elf_section_data (isec)->this_hdr;
5487 ohdr = &elf_section_data (osec)->this_hdr;
5489 ohdr->sh_entsize = ihdr->sh_entsize;
5491 if (ihdr->sh_type == SHT_SYMTAB
5492 || ihdr->sh_type == SHT_DYNSYM
5493 || ihdr->sh_type == SHT_GNU_verneed
5494 || ihdr->sh_type == SHT_GNU_verdef)
5495 ohdr->sh_info = ihdr->sh_info;
5497 /* Set things up for objcopy. The output SHT_GROUP section will
5498 have its elf_next_in_group pointing back to the input group
5500 elf_next_in_group (osec) = elf_next_in_group (isec);
5501 elf_group_name (osec) = elf_group_name (isec);
5503 osec->use_rela_p = isec->use_rela_p;
5508 /* Copy private header information. */
5511 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
5513 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5514 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5517 /* Copy over private BFD data if it has not already been copied.
5518 This must be done here, rather than in the copy_private_bfd_data
5519 entry point, because the latter is called after the section
5520 contents have been set, which means that the program headers have
5521 already been worked out. */
5522 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5524 if (! copy_private_bfd_data (ibfd, obfd))
5531 /* Copy private symbol information. If this symbol is in a section
5532 which we did not map into a BFD section, try to map the section
5533 index correctly. We use special macro definitions for the mapped
5534 section indices; these definitions are interpreted by the
5535 swap_out_syms function. */
5537 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5538 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5539 #define MAP_STRTAB (SHN_HIOS + 3)
5540 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5541 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5544 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
5549 elf_symbol_type *isym, *osym;
5551 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5552 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5555 isym = elf_symbol_from (ibfd, isymarg);
5556 osym = elf_symbol_from (obfd, osymarg);
5560 && bfd_is_abs_section (isym->symbol.section))
5564 shndx = isym->internal_elf_sym.st_shndx;
5565 if (shndx == elf_onesymtab (ibfd))
5566 shndx = MAP_ONESYMTAB;
5567 else if (shndx == elf_dynsymtab (ibfd))
5568 shndx = MAP_DYNSYMTAB;
5569 else if (shndx == elf_tdata (ibfd)->strtab_section)
5571 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5572 shndx = MAP_SHSTRTAB;
5573 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5574 shndx = MAP_SYM_SHNDX;
5575 osym->internal_elf_sym.st_shndx = shndx;
5581 /* Swap out the symbols. */
5584 swap_out_syms (bfd *abfd,
5585 struct bfd_strtab_hash **sttp,
5588 const struct elf_backend_data *bed;
5591 struct bfd_strtab_hash *stt;
5592 Elf_Internal_Shdr *symtab_hdr;
5593 Elf_Internal_Shdr *symtab_shndx_hdr;
5594 Elf_Internal_Shdr *symstrtab_hdr;
5595 bfd_byte *outbound_syms;
5596 bfd_byte *outbound_shndx;
5599 bfd_boolean name_local_sections;
5601 if (!elf_map_symbols (abfd))
5604 /* Dump out the symtabs. */
5605 stt = _bfd_elf_stringtab_init ();
5609 bed = get_elf_backend_data (abfd);
5610 symcount = bfd_get_symcount (abfd);
5611 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5612 symtab_hdr->sh_type = SHT_SYMTAB;
5613 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5614 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5615 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5616 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
5618 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5619 symstrtab_hdr->sh_type = SHT_STRTAB;
5621 amt = (bfd_size_type) (1 + symcount) * bed->s->sizeof_sym;
5622 outbound_syms = bfd_alloc (abfd, amt);
5623 if (outbound_syms == NULL)
5625 _bfd_stringtab_free (stt);
5628 symtab_hdr->contents = outbound_syms;
5630 outbound_shndx = NULL;
5631 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5632 if (symtab_shndx_hdr->sh_name != 0)
5634 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
5635 outbound_shndx = bfd_zalloc (abfd, amt);
5636 if (outbound_shndx == NULL)
5638 _bfd_stringtab_free (stt);
5642 symtab_shndx_hdr->contents = outbound_shndx;
5643 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5644 symtab_shndx_hdr->sh_size = amt;
5645 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5646 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5649 /* Now generate the data (for "contents"). */
5651 /* Fill in zeroth symbol and swap it out. */
5652 Elf_Internal_Sym sym;
5658 sym.st_shndx = SHN_UNDEF;
5659 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5660 outbound_syms += bed->s->sizeof_sym;
5661 if (outbound_shndx != NULL)
5662 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5666 = (bed->elf_backend_name_local_section_symbols
5667 && bed->elf_backend_name_local_section_symbols (abfd));
5669 syms = bfd_get_outsymbols (abfd);
5670 for (idx = 0; idx < symcount; idx++)
5672 Elf_Internal_Sym sym;
5673 bfd_vma value = syms[idx]->value;
5674 elf_symbol_type *type_ptr;
5675 flagword flags = syms[idx]->flags;
5678 if (!name_local_sections
5679 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
5681 /* Local section symbols have no name. */
5686 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5689 if (sym.st_name == (unsigned long) -1)
5691 _bfd_stringtab_free (stt);
5696 type_ptr = elf_symbol_from (abfd, syms[idx]);
5698 if ((flags & BSF_SECTION_SYM) == 0
5699 && bfd_is_com_section (syms[idx]->section))
5701 /* ELF common symbols put the alignment into the `value' field,
5702 and the size into the `size' field. This is backwards from
5703 how BFD handles it, so reverse it here. */
5704 sym.st_size = value;
5705 if (type_ptr == NULL
5706 || type_ptr->internal_elf_sym.st_value == 0)
5707 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5709 sym.st_value = type_ptr->internal_elf_sym.st_value;
5710 sym.st_shndx = _bfd_elf_section_from_bfd_section
5711 (abfd, syms[idx]->section);
5715 asection *sec = syms[idx]->section;
5718 if (sec->output_section)
5720 value += sec->output_offset;
5721 sec = sec->output_section;
5724 /* Don't add in the section vma for relocatable output. */
5725 if (! relocatable_p)
5727 sym.st_value = value;
5728 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5730 if (bfd_is_abs_section (sec)
5732 && type_ptr->internal_elf_sym.st_shndx != 0)
5734 /* This symbol is in a real ELF section which we did
5735 not create as a BFD section. Undo the mapping done
5736 by copy_private_symbol_data. */
5737 shndx = type_ptr->internal_elf_sym.st_shndx;
5741 shndx = elf_onesymtab (abfd);
5744 shndx = elf_dynsymtab (abfd);
5747 shndx = elf_tdata (abfd)->strtab_section;
5750 shndx = elf_tdata (abfd)->shstrtab_section;
5753 shndx = elf_tdata (abfd)->symtab_shndx_section;
5761 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5767 /* Writing this would be a hell of a lot easier if
5768 we had some decent documentation on bfd, and
5769 knew what to expect of the library, and what to
5770 demand of applications. For example, it
5771 appears that `objcopy' might not set the
5772 section of a symbol to be a section that is
5773 actually in the output file. */
5774 sec2 = bfd_get_section_by_name (abfd, sec->name);
5777 _bfd_error_handler (_("\
5778 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5779 syms[idx]->name ? syms[idx]->name : "<Local sym>",
5781 bfd_set_error (bfd_error_invalid_operation);
5782 _bfd_stringtab_free (stt);
5786 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5787 BFD_ASSERT (shndx != -1);
5791 sym.st_shndx = shndx;
5794 if ((flags & BSF_THREAD_LOCAL) != 0)
5796 else if ((flags & BSF_FUNCTION) != 0)
5798 else if ((flags & BSF_OBJECT) != 0)
5803 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
5806 /* Processor-specific types. */
5807 if (type_ptr != NULL
5808 && bed->elf_backend_get_symbol_type)
5809 type = ((*bed->elf_backend_get_symbol_type)
5810 (&type_ptr->internal_elf_sym, type));
5812 if (flags & BSF_SECTION_SYM)
5814 if (flags & BSF_GLOBAL)
5815 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
5817 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
5819 else if (bfd_is_com_section (syms[idx]->section))
5820 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
5821 else if (bfd_is_und_section (syms[idx]->section))
5822 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
5826 else if (flags & BSF_FILE)
5827 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
5830 int bind = STB_LOCAL;
5832 if (flags & BSF_LOCAL)
5834 else if (flags & BSF_WEAK)
5836 else if (flags & BSF_GLOBAL)
5839 sym.st_info = ELF_ST_INFO (bind, type);
5842 if (type_ptr != NULL)
5843 sym.st_other = type_ptr->internal_elf_sym.st_other;
5847 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5848 outbound_syms += bed->s->sizeof_sym;
5849 if (outbound_shndx != NULL)
5850 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5854 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
5855 symstrtab_hdr->sh_type = SHT_STRTAB;
5857 symstrtab_hdr->sh_flags = 0;
5858 symstrtab_hdr->sh_addr = 0;
5859 symstrtab_hdr->sh_entsize = 0;
5860 symstrtab_hdr->sh_link = 0;
5861 symstrtab_hdr->sh_info = 0;
5862 symstrtab_hdr->sh_addralign = 1;
5867 /* Return the number of bytes required to hold the symtab vector.
5869 Note that we base it on the count plus 1, since we will null terminate
5870 the vector allocated based on this size. However, the ELF symbol table
5871 always has a dummy entry as symbol #0, so it ends up even. */
5874 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
5878 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
5880 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5881 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5883 symtab_size -= sizeof (asymbol *);
5889 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
5893 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
5895 if (elf_dynsymtab (abfd) == 0)
5897 bfd_set_error (bfd_error_invalid_operation);
5901 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5902 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5904 symtab_size -= sizeof (asymbol *);
5910 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
5913 return (asect->reloc_count + 1) * sizeof (arelent *);
5916 /* Canonicalize the relocs. */
5919 _bfd_elf_canonicalize_reloc (bfd *abfd,
5926 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5928 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
5931 tblptr = section->relocation;
5932 for (i = 0; i < section->reloc_count; i++)
5933 *relptr++ = tblptr++;
5937 return section->reloc_count;
5941 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
5943 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5944 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
5947 bfd_get_symcount (abfd) = symcount;
5952 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
5953 asymbol **allocation)
5955 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5956 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
5959 bfd_get_dynamic_symcount (abfd) = symcount;
5963 /* Return the size required for the dynamic reloc entries. Any loadable
5964 section that was actually installed in the BFD, and has type SHT_REL
5965 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
5966 dynamic reloc section. */
5969 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
5974 if (elf_dynsymtab (abfd) == 0)
5976 bfd_set_error (bfd_error_invalid_operation);
5980 ret = sizeof (arelent *);
5981 for (s = abfd->sections; s != NULL; s = s->next)
5982 if ((s->flags & SEC_LOAD) != 0
5983 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5984 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5985 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5986 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
5987 * sizeof (arelent *));
5992 /* Canonicalize the dynamic relocation entries. Note that we return the
5993 dynamic relocations as a single block, although they are actually
5994 associated with particular sections; the interface, which was
5995 designed for SunOS style shared libraries, expects that there is only
5996 one set of dynamic relocs. Any loadable section that was actually
5997 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
5998 dynamic symbol table, is considered to be a dynamic reloc section. */
6001 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6005 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6009 if (elf_dynsymtab (abfd) == 0)
6011 bfd_set_error (bfd_error_invalid_operation);
6015 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6017 for (s = abfd->sections; s != NULL; s = s->next)
6019 if ((s->flags & SEC_LOAD) != 0
6020 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6021 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6022 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6027 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6029 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6031 for (i = 0; i < count; i++)
6042 /* Read in the version information. */
6045 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6047 bfd_byte *contents = NULL;
6049 unsigned int freeidx = 0;
6051 if (elf_dynverref (abfd) != 0)
6053 Elf_Internal_Shdr *hdr;
6054 Elf_External_Verneed *everneed;
6055 Elf_Internal_Verneed *iverneed;
6058 hdr = &elf_tdata (abfd)->dynverref_hdr;
6060 amt = (bfd_size_type) hdr->sh_info * sizeof (Elf_Internal_Verneed);
6061 elf_tdata (abfd)->verref = bfd_zalloc (abfd, amt);
6062 if (elf_tdata (abfd)->verref == NULL)
6065 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6067 contents = bfd_malloc (hdr->sh_size);
6068 if (contents == NULL)
6070 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6071 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6074 everneed = (Elf_External_Verneed *) contents;
6075 iverneed = elf_tdata (abfd)->verref;
6076 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6078 Elf_External_Vernaux *evernaux;
6079 Elf_Internal_Vernaux *ivernaux;
6082 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6084 iverneed->vn_bfd = abfd;
6086 iverneed->vn_filename =
6087 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6089 if (iverneed->vn_filename == NULL)
6092 amt = iverneed->vn_cnt;
6093 amt *= sizeof (Elf_Internal_Vernaux);
6094 iverneed->vn_auxptr = bfd_alloc (abfd, amt);
6096 evernaux = ((Elf_External_Vernaux *)
6097 ((bfd_byte *) everneed + iverneed->vn_aux));
6098 ivernaux = iverneed->vn_auxptr;
6099 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6101 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6103 ivernaux->vna_nodename =
6104 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6105 ivernaux->vna_name);
6106 if (ivernaux->vna_nodename == NULL)
6109 if (j + 1 < iverneed->vn_cnt)
6110 ivernaux->vna_nextptr = ivernaux + 1;
6112 ivernaux->vna_nextptr = NULL;
6114 evernaux = ((Elf_External_Vernaux *)
6115 ((bfd_byte *) evernaux + ivernaux->vna_next));
6117 if (ivernaux->vna_other > freeidx)
6118 freeidx = ivernaux->vna_other;
6121 if (i + 1 < hdr->sh_info)
6122 iverneed->vn_nextref = iverneed + 1;
6124 iverneed->vn_nextref = NULL;
6126 everneed = ((Elf_External_Verneed *)
6127 ((bfd_byte *) everneed + iverneed->vn_next));
6134 if (elf_dynverdef (abfd) != 0)
6136 Elf_Internal_Shdr *hdr;
6137 Elf_External_Verdef *everdef;
6138 Elf_Internal_Verdef *iverdef;
6139 Elf_Internal_Verdef *iverdefarr;
6140 Elf_Internal_Verdef iverdefmem;
6142 unsigned int maxidx;
6144 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6146 contents = bfd_malloc (hdr->sh_size);
6147 if (contents == NULL)
6149 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6150 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6153 /* We know the number of entries in the section but not the maximum
6154 index. Therefore we have to run through all entries and find
6156 everdef = (Elf_External_Verdef *) contents;
6158 for (i = 0; i < hdr->sh_info; ++i)
6160 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6162 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6163 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6165 everdef = ((Elf_External_Verdef *)
6166 ((bfd_byte *) everdef + iverdefmem.vd_next));
6169 if (default_imported_symver)
6171 if (freeidx > maxidx)
6176 amt = (bfd_size_type) maxidx * sizeof (Elf_Internal_Verdef);
6177 elf_tdata (abfd)->verdef = bfd_zalloc (abfd, amt);
6178 if (elf_tdata (abfd)->verdef == NULL)
6181 elf_tdata (abfd)->cverdefs = maxidx;
6183 everdef = (Elf_External_Verdef *) contents;
6184 iverdefarr = elf_tdata (abfd)->verdef;
6185 for (i = 0; i < hdr->sh_info; i++)
6187 Elf_External_Verdaux *everdaux;
6188 Elf_Internal_Verdaux *iverdaux;
6191 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6193 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6194 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6196 iverdef->vd_bfd = abfd;
6198 amt = (bfd_size_type) iverdef->vd_cnt * sizeof (Elf_Internal_Verdaux);
6199 iverdef->vd_auxptr = bfd_alloc (abfd, amt);
6200 if (iverdef->vd_auxptr == NULL)
6203 everdaux = ((Elf_External_Verdaux *)
6204 ((bfd_byte *) everdef + iverdef->vd_aux));
6205 iverdaux = iverdef->vd_auxptr;
6206 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6208 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6210 iverdaux->vda_nodename =
6211 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6212 iverdaux->vda_name);
6213 if (iverdaux->vda_nodename == NULL)
6216 if (j + 1 < iverdef->vd_cnt)
6217 iverdaux->vda_nextptr = iverdaux + 1;
6219 iverdaux->vda_nextptr = NULL;
6221 everdaux = ((Elf_External_Verdaux *)
6222 ((bfd_byte *) everdaux + iverdaux->vda_next));
6225 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6227 if (i + 1 < hdr->sh_info)
6228 iverdef->vd_nextdef = iverdef + 1;
6230 iverdef->vd_nextdef = NULL;
6232 everdef = ((Elf_External_Verdef *)
6233 ((bfd_byte *) everdef + iverdef->vd_next));
6239 else if (default_imported_symver)
6246 amt = (bfd_size_type) freeidx * sizeof (Elf_Internal_Verdef);
6247 elf_tdata (abfd)->verdef = bfd_zalloc (abfd, amt);
6248 if (elf_tdata (abfd)->verdef == NULL)
6251 elf_tdata (abfd)->cverdefs = freeidx;
6254 /* Create a default version based on the soname. */
6255 if (default_imported_symver)
6257 Elf_Internal_Verdef *iverdef;
6258 Elf_Internal_Verdaux *iverdaux;
6260 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6262 iverdef->vd_version = VER_DEF_CURRENT;
6263 iverdef->vd_flags = 0;
6264 iverdef->vd_ndx = freeidx;
6265 iverdef->vd_cnt = 1;
6267 iverdef->vd_bfd = abfd;
6269 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6270 if (iverdef->vd_nodename == NULL)
6272 iverdef->vd_nextdef = NULL;
6273 amt = (bfd_size_type) sizeof (Elf_Internal_Verdaux);
6274 iverdef->vd_auxptr = bfd_alloc (abfd, amt);
6276 iverdaux = iverdef->vd_auxptr;
6277 iverdaux->vda_nodename = iverdef->vd_nodename;
6278 iverdaux->vda_nextptr = NULL;
6284 if (contents != NULL)
6290 _bfd_elf_make_empty_symbol (bfd *abfd)
6292 elf_symbol_type *newsym;
6293 bfd_size_type amt = sizeof (elf_symbol_type);
6295 newsym = bfd_zalloc (abfd, amt);
6300 newsym->symbol.the_bfd = abfd;
6301 return &newsym->symbol;
6306 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
6310 bfd_symbol_info (symbol, ret);
6313 /* Return whether a symbol name implies a local symbol. Most targets
6314 use this function for the is_local_label_name entry point, but some
6318 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
6321 /* Normal local symbols start with ``.L''. */
6322 if (name[0] == '.' && name[1] == 'L')
6325 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6326 DWARF debugging symbols starting with ``..''. */
6327 if (name[0] == '.' && name[1] == '.')
6330 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6331 emitting DWARF debugging output. I suspect this is actually a
6332 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6333 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6334 underscore to be emitted on some ELF targets). For ease of use,
6335 we treat such symbols as local. */
6336 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6343 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6344 asymbol *symbol ATTRIBUTE_UNUSED)
6351 _bfd_elf_set_arch_mach (bfd *abfd,
6352 enum bfd_architecture arch,
6353 unsigned long machine)
6355 /* If this isn't the right architecture for this backend, and this
6356 isn't the generic backend, fail. */
6357 if (arch != get_elf_backend_data (abfd)->arch
6358 && arch != bfd_arch_unknown
6359 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6362 return bfd_default_set_arch_mach (abfd, arch, machine);
6365 /* Find the function to a particular section and offset,
6366 for error reporting. */
6369 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6373 const char **filename_ptr,
6374 const char **functionname_ptr)
6376 const char *filename;
6377 asymbol *func, *file;
6380 /* ??? Given multiple file symbols, it is impossible to reliably
6381 choose the right file name for global symbols. File symbols are
6382 local symbols, and thus all file symbols must sort before any
6383 global symbols. The ELF spec may be interpreted to say that a
6384 file symbol must sort before other local symbols, but currently
6385 ld -r doesn't do this. So, for ld -r output, it is possible to
6386 make a better choice of file name for local symbols by ignoring
6387 file symbols appearing after a given local symbol. */
6388 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
6394 state = nothing_seen;
6396 for (p = symbols; *p != NULL; p++)
6400 q = (elf_symbol_type *) *p;
6402 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6408 if (state == symbol_seen)
6409 state = file_after_symbol_seen;
6415 if (bfd_get_section (&q->symbol) == section
6416 && q->symbol.value >= low_func
6417 && q->symbol.value <= offset)
6419 func = (asymbol *) q;
6420 low_func = q->symbol.value;
6423 else if (ELF_ST_BIND (q->internal_elf_sym.st_info) != STB_LOCAL
6424 && state == file_after_symbol_seen)
6427 filename = bfd_asymbol_name (file);
6431 if (state == nothing_seen)
6432 state = symbol_seen;
6439 *filename_ptr = filename;
6440 if (functionname_ptr)
6441 *functionname_ptr = bfd_asymbol_name (func);
6446 /* Find the nearest line to a particular section and offset,
6447 for error reporting. */
6450 _bfd_elf_find_nearest_line (bfd *abfd,
6454 const char **filename_ptr,
6455 const char **functionname_ptr,
6456 unsigned int *line_ptr)
6460 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6461 filename_ptr, functionname_ptr,
6464 if (!*functionname_ptr)
6465 elf_find_function (abfd, section, symbols, offset,
6466 *filename_ptr ? NULL : filename_ptr,
6472 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6473 filename_ptr, functionname_ptr,
6475 &elf_tdata (abfd)->dwarf2_find_line_info))
6477 if (!*functionname_ptr)
6478 elf_find_function (abfd, section, symbols, offset,
6479 *filename_ptr ? NULL : filename_ptr,
6485 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6486 &found, filename_ptr,
6487 functionname_ptr, line_ptr,
6488 &elf_tdata (abfd)->line_info))
6490 if (found && (*functionname_ptr || *line_ptr))
6493 if (symbols == NULL)
6496 if (! elf_find_function (abfd, section, symbols, offset,
6497 filename_ptr, functionname_ptr))
6505 _bfd_elf_sizeof_headers (bfd *abfd, bfd_boolean reloc)
6509 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
6511 ret += get_program_header_size (abfd);
6516 _bfd_elf_set_section_contents (bfd *abfd,
6518 const void *location,
6520 bfd_size_type count)
6522 Elf_Internal_Shdr *hdr;
6525 if (! abfd->output_has_begun
6526 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6529 hdr = &elf_section_data (section)->this_hdr;
6530 pos = hdr->sh_offset + offset;
6531 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6532 || bfd_bwrite (location, count, abfd) != count)
6539 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
6540 arelent *cache_ptr ATTRIBUTE_UNUSED,
6541 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
6546 /* Try to convert a non-ELF reloc into an ELF one. */
6549 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
6551 /* Check whether we really have an ELF howto. */
6553 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6555 bfd_reloc_code_real_type code;
6556 reloc_howto_type *howto;
6558 /* Alien reloc: Try to determine its type to replace it with an
6559 equivalent ELF reloc. */
6561 if (areloc->howto->pc_relative)
6563 switch (areloc->howto->bitsize)
6566 code = BFD_RELOC_8_PCREL;
6569 code = BFD_RELOC_12_PCREL;
6572 code = BFD_RELOC_16_PCREL;
6575 code = BFD_RELOC_24_PCREL;
6578 code = BFD_RELOC_32_PCREL;
6581 code = BFD_RELOC_64_PCREL;
6587 howto = bfd_reloc_type_lookup (abfd, code);
6589 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6591 if (howto->pcrel_offset)
6592 areloc->addend += areloc->address;
6594 areloc->addend -= areloc->address; /* addend is unsigned!! */
6599 switch (areloc->howto->bitsize)
6605 code = BFD_RELOC_14;
6608 code = BFD_RELOC_16;
6611 code = BFD_RELOC_26;
6614 code = BFD_RELOC_32;
6617 code = BFD_RELOC_64;
6623 howto = bfd_reloc_type_lookup (abfd, code);
6627 areloc->howto = howto;
6635 (*_bfd_error_handler)
6636 (_("%B: unsupported relocation type %s"),
6637 abfd, areloc->howto->name);
6638 bfd_set_error (bfd_error_bad_value);
6643 _bfd_elf_close_and_cleanup (bfd *abfd)
6645 if (bfd_get_format (abfd) == bfd_object)
6647 if (elf_shstrtab (abfd) != NULL)
6648 _bfd_elf_strtab_free (elf_shstrtab (abfd));
6651 return _bfd_generic_close_and_cleanup (abfd);
6654 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6655 in the relocation's offset. Thus we cannot allow any sort of sanity
6656 range-checking to interfere. There is nothing else to do in processing
6659 bfd_reloc_status_type
6660 _bfd_elf_rel_vtable_reloc_fn
6661 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
6662 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
6663 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
6664 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
6666 return bfd_reloc_ok;
6669 /* Elf core file support. Much of this only works on native
6670 toolchains, since we rely on knowing the
6671 machine-dependent procfs structure in order to pick
6672 out details about the corefile. */
6674 #ifdef HAVE_SYS_PROCFS_H
6675 # include <sys/procfs.h>
6678 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6681 elfcore_make_pid (bfd *abfd)
6683 return ((elf_tdata (abfd)->core_lwpid << 16)
6684 + (elf_tdata (abfd)->core_pid));
6687 /* If there isn't a section called NAME, make one, using
6688 data from SECT. Note, this function will generate a
6689 reference to NAME, so you shouldn't deallocate or
6693 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
6697 if (bfd_get_section_by_name (abfd, name) != NULL)
6700 sect2 = bfd_make_section (abfd, name);
6704 sect2->size = sect->size;
6705 sect2->filepos = sect->filepos;
6706 sect2->flags = sect->flags;
6707 sect2->alignment_power = sect->alignment_power;
6711 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6712 actually creates up to two pseudosections:
6713 - For the single-threaded case, a section named NAME, unless
6714 such a section already exists.
6715 - For the multi-threaded case, a section named "NAME/PID", where
6716 PID is elfcore_make_pid (abfd).
6717 Both pseudosections have identical contents. */
6719 _bfd_elfcore_make_pseudosection (bfd *abfd,
6725 char *threaded_name;
6729 /* Build the section name. */
6731 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
6732 len = strlen (buf) + 1;
6733 threaded_name = bfd_alloc (abfd, len);
6734 if (threaded_name == NULL)
6736 memcpy (threaded_name, buf, len);
6738 sect = bfd_make_section_anyway (abfd, threaded_name);
6742 sect->filepos = filepos;
6743 sect->flags = SEC_HAS_CONTENTS;
6744 sect->alignment_power = 2;
6746 return elfcore_maybe_make_sect (abfd, name, sect);
6749 /* prstatus_t exists on:
6751 linux 2.[01] + glibc
6755 #if defined (HAVE_PRSTATUS_T)
6758 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
6763 if (note->descsz == sizeof (prstatus_t))
6767 size = sizeof (prstat.pr_reg);
6768 offset = offsetof (prstatus_t, pr_reg);
6769 memcpy (&prstat, note->descdata, sizeof (prstat));
6771 /* Do not overwrite the core signal if it
6772 has already been set by another thread. */
6773 if (elf_tdata (abfd)->core_signal == 0)
6774 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6775 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6777 /* pr_who exists on:
6780 pr_who doesn't exist on:
6783 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6784 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6787 #if defined (HAVE_PRSTATUS32_T)
6788 else if (note->descsz == sizeof (prstatus32_t))
6790 /* 64-bit host, 32-bit corefile */
6791 prstatus32_t prstat;
6793 size = sizeof (prstat.pr_reg);
6794 offset = offsetof (prstatus32_t, pr_reg);
6795 memcpy (&prstat, note->descdata, sizeof (prstat));
6797 /* Do not overwrite the core signal if it
6798 has already been set by another thread. */
6799 if (elf_tdata (abfd)->core_signal == 0)
6800 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6801 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6803 /* pr_who exists on:
6806 pr_who doesn't exist on:
6809 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6810 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6813 #endif /* HAVE_PRSTATUS32_T */
6816 /* Fail - we don't know how to handle any other
6817 note size (ie. data object type). */
6821 /* Make a ".reg/999" section and a ".reg" section. */
6822 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
6823 size, note->descpos + offset);
6825 #endif /* defined (HAVE_PRSTATUS_T) */
6827 /* Create a pseudosection containing the exact contents of NOTE. */
6829 elfcore_make_note_pseudosection (bfd *abfd,
6831 Elf_Internal_Note *note)
6833 return _bfd_elfcore_make_pseudosection (abfd, name,
6834 note->descsz, note->descpos);
6837 /* There isn't a consistent prfpregset_t across platforms,
6838 but it doesn't matter, because we don't have to pick this
6839 data structure apart. */
6842 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
6844 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6847 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6848 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6852 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
6854 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
6857 #if defined (HAVE_PRPSINFO_T)
6858 typedef prpsinfo_t elfcore_psinfo_t;
6859 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6860 typedef prpsinfo32_t elfcore_psinfo32_t;
6864 #if defined (HAVE_PSINFO_T)
6865 typedef psinfo_t elfcore_psinfo_t;
6866 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6867 typedef psinfo32_t elfcore_psinfo32_t;
6871 /* return a malloc'ed copy of a string at START which is at
6872 most MAX bytes long, possibly without a terminating '\0'.
6873 the copy will always have a terminating '\0'. */
6876 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
6879 char *end = memchr (start, '\0', max);
6887 dups = bfd_alloc (abfd, len + 1);
6891 memcpy (dups, start, len);
6897 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6899 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
6901 if (note->descsz == sizeof (elfcore_psinfo_t))
6903 elfcore_psinfo_t psinfo;
6905 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6907 elf_tdata (abfd)->core_program
6908 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6909 sizeof (psinfo.pr_fname));
6911 elf_tdata (abfd)->core_command
6912 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6913 sizeof (psinfo.pr_psargs));
6915 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6916 else if (note->descsz == sizeof (elfcore_psinfo32_t))
6918 /* 64-bit host, 32-bit corefile */
6919 elfcore_psinfo32_t psinfo;
6921 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6923 elf_tdata (abfd)->core_program
6924 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6925 sizeof (psinfo.pr_fname));
6927 elf_tdata (abfd)->core_command
6928 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6929 sizeof (psinfo.pr_psargs));
6935 /* Fail - we don't know how to handle any other
6936 note size (ie. data object type). */
6940 /* Note that for some reason, a spurious space is tacked
6941 onto the end of the args in some (at least one anyway)
6942 implementations, so strip it off if it exists. */
6945 char *command = elf_tdata (abfd)->core_command;
6946 int n = strlen (command);
6948 if (0 < n && command[n - 1] == ' ')
6949 command[n - 1] = '\0';
6954 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6956 #if defined (HAVE_PSTATUS_T)
6958 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
6960 if (note->descsz == sizeof (pstatus_t)
6961 #if defined (HAVE_PXSTATUS_T)
6962 || note->descsz == sizeof (pxstatus_t)
6968 memcpy (&pstat, note->descdata, sizeof (pstat));
6970 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6972 #if defined (HAVE_PSTATUS32_T)
6973 else if (note->descsz == sizeof (pstatus32_t))
6975 /* 64-bit host, 32-bit corefile */
6978 memcpy (&pstat, note->descdata, sizeof (pstat));
6980 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6983 /* Could grab some more details from the "representative"
6984 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6985 NT_LWPSTATUS note, presumably. */
6989 #endif /* defined (HAVE_PSTATUS_T) */
6991 #if defined (HAVE_LWPSTATUS_T)
6993 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
6995 lwpstatus_t lwpstat;
7001 if (note->descsz != sizeof (lwpstat)
7002 #if defined (HAVE_LWPXSTATUS_T)
7003 && note->descsz != sizeof (lwpxstatus_t)
7008 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7010 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7011 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7013 /* Make a ".reg/999" section. */
7015 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7016 len = strlen (buf) + 1;
7017 name = bfd_alloc (abfd, len);
7020 memcpy (name, buf, len);
7022 sect = bfd_make_section_anyway (abfd, name);
7026 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7027 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7028 sect->filepos = note->descpos
7029 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7032 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7033 sect->size = sizeof (lwpstat.pr_reg);
7034 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7037 sect->flags = SEC_HAS_CONTENTS;
7038 sect->alignment_power = 2;
7040 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7043 /* Make a ".reg2/999" section */
7045 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7046 len = strlen (buf) + 1;
7047 name = bfd_alloc (abfd, len);
7050 memcpy (name, buf, len);
7052 sect = bfd_make_section_anyway (abfd, name);
7056 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7057 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7058 sect->filepos = note->descpos
7059 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7062 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7063 sect->size = sizeof (lwpstat.pr_fpreg);
7064 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7067 sect->flags = SEC_HAS_CONTENTS;
7068 sect->alignment_power = 2;
7070 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7072 #endif /* defined (HAVE_LWPSTATUS_T) */
7074 #if defined (HAVE_WIN32_PSTATUS_T)
7076 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7082 win32_pstatus_t pstatus;
7084 if (note->descsz < sizeof (pstatus))
7087 memcpy (&pstatus, note->descdata, sizeof (pstatus));
7089 switch (pstatus.data_type)
7091 case NOTE_INFO_PROCESS:
7092 /* FIXME: need to add ->core_command. */
7093 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
7094 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
7097 case NOTE_INFO_THREAD:
7098 /* Make a ".reg/999" section. */
7099 sprintf (buf, ".reg/%ld", (long) pstatus.data.thread_info.tid);
7101 len = strlen (buf) + 1;
7102 name = bfd_alloc (abfd, len);
7106 memcpy (name, buf, len);
7108 sect = bfd_make_section_anyway (abfd, name);
7112 sect->size = sizeof (pstatus.data.thread_info.thread_context);
7113 sect->filepos = (note->descpos
7114 + offsetof (struct win32_pstatus,
7115 data.thread_info.thread_context));
7116 sect->flags = SEC_HAS_CONTENTS;
7117 sect->alignment_power = 2;
7119 if (pstatus.data.thread_info.is_active_thread)
7120 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7124 case NOTE_INFO_MODULE:
7125 /* Make a ".module/xxxxxxxx" section. */
7126 sprintf (buf, ".module/%08lx",
7127 (long) pstatus.data.module_info.base_address);
7129 len = strlen (buf) + 1;
7130 name = bfd_alloc (abfd, len);
7134 memcpy (name, buf, len);
7136 sect = bfd_make_section_anyway (abfd, name);
7141 sect->size = note->descsz;
7142 sect->filepos = note->descpos;
7143 sect->flags = SEC_HAS_CONTENTS;
7144 sect->alignment_power = 2;
7153 #endif /* HAVE_WIN32_PSTATUS_T */
7156 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7158 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7166 if (bed->elf_backend_grok_prstatus)
7167 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7169 #if defined (HAVE_PRSTATUS_T)
7170 return elfcore_grok_prstatus (abfd, note);
7175 #if defined (HAVE_PSTATUS_T)
7177 return elfcore_grok_pstatus (abfd, note);
7180 #if defined (HAVE_LWPSTATUS_T)
7182 return elfcore_grok_lwpstatus (abfd, note);
7185 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7186 return elfcore_grok_prfpreg (abfd, note);
7188 #if defined (HAVE_WIN32_PSTATUS_T)
7189 case NT_WIN32PSTATUS:
7190 return elfcore_grok_win32pstatus (abfd, note);
7193 case NT_PRXFPREG: /* Linux SSE extension */
7194 if (note->namesz == 6
7195 && strcmp (note->namedata, "LINUX") == 0)
7196 return elfcore_grok_prxfpreg (abfd, note);
7202 if (bed->elf_backend_grok_psinfo)
7203 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7205 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7206 return elfcore_grok_psinfo (abfd, note);
7213 asection *sect = bfd_make_section_anyway (abfd, ".auxv");
7217 sect->size = note->descsz;
7218 sect->filepos = note->descpos;
7219 sect->flags = SEC_HAS_CONTENTS;
7220 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7228 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
7232 cp = strchr (note->namedata, '@');
7235 *lwpidp = atoi(cp + 1);
7242 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
7245 /* Signal number at offset 0x08. */
7246 elf_tdata (abfd)->core_signal
7247 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7249 /* Process ID at offset 0x50. */
7250 elf_tdata (abfd)->core_pid
7251 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7253 /* Command name at 0x7c (max 32 bytes, including nul). */
7254 elf_tdata (abfd)->core_command
7255 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
7257 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
7262 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
7266 if (elfcore_netbsd_get_lwpid (note, &lwp))
7267 elf_tdata (abfd)->core_lwpid = lwp;
7269 if (note->type == NT_NETBSDCORE_PROCINFO)
7271 /* NetBSD-specific core "procinfo". Note that we expect to
7272 find this note before any of the others, which is fine,
7273 since the kernel writes this note out first when it
7274 creates a core file. */
7276 return elfcore_grok_netbsd_procinfo (abfd, note);
7279 /* As of Jan 2002 there are no other machine-independent notes
7280 defined for NetBSD core files. If the note type is less
7281 than the start of the machine-dependent note types, we don't
7284 if (note->type < NT_NETBSDCORE_FIRSTMACH)
7288 switch (bfd_get_arch (abfd))
7290 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7291 PT_GETFPREGS == mach+2. */
7293 case bfd_arch_alpha:
7294 case bfd_arch_sparc:
7297 case NT_NETBSDCORE_FIRSTMACH+0:
7298 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7300 case NT_NETBSDCORE_FIRSTMACH+2:
7301 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7307 /* On all other arch's, PT_GETREGS == mach+1 and
7308 PT_GETFPREGS == mach+3. */
7313 case NT_NETBSDCORE_FIRSTMACH+1:
7314 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7316 case NT_NETBSDCORE_FIRSTMACH+3:
7317 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7327 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, pid_t *tid)
7329 void *ddata = note->descdata;
7336 /* nto_procfs_status 'pid' field is at offset 0. */
7337 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
7339 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7340 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
7342 /* nto_procfs_status 'flags' field is at offset 8. */
7343 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
7345 /* nto_procfs_status 'what' field is at offset 14. */
7346 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
7348 elf_tdata (abfd)->core_signal = sig;
7349 elf_tdata (abfd)->core_lwpid = *tid;
7352 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7353 do not come from signals so we make sure we set the current
7354 thread just in case. */
7355 if (flags & 0x00000080)
7356 elf_tdata (abfd)->core_lwpid = *tid;
7358 /* Make a ".qnx_core_status/%d" section. */
7359 sprintf (buf, ".qnx_core_status/%ld", (long) *tid);
7361 name = bfd_alloc (abfd, strlen (buf) + 1);
7366 sect = bfd_make_section_anyway (abfd, name);
7370 sect->size = note->descsz;
7371 sect->filepos = note->descpos;
7372 sect->flags = SEC_HAS_CONTENTS;
7373 sect->alignment_power = 2;
7375 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7379 elfcore_grok_nto_regs (bfd *abfd,
7380 Elf_Internal_Note *note,
7388 /* Make a "(base)/%d" section. */
7389 sprintf (buf, "%s/%ld", base, (long) tid);
7391 name = bfd_alloc (abfd, strlen (buf) + 1);
7396 sect = bfd_make_section_anyway (abfd, name);
7400 sect->size = note->descsz;
7401 sect->filepos = note->descpos;
7402 sect->flags = SEC_HAS_CONTENTS;
7403 sect->alignment_power = 2;
7405 /* This is the current thread. */
7406 if (elf_tdata (abfd)->core_lwpid == tid)
7407 return elfcore_maybe_make_sect (abfd, base, sect);
7412 #define BFD_QNT_CORE_INFO 7
7413 #define BFD_QNT_CORE_STATUS 8
7414 #define BFD_QNT_CORE_GREG 9
7415 #define BFD_QNT_CORE_FPREG 10
7418 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
7420 /* Every GREG section has a STATUS section before it. Store the
7421 tid from the previous call to pass down to the next gregs
7423 static pid_t tid = 1;
7427 case BFD_QNT_CORE_INFO:
7428 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7429 case BFD_QNT_CORE_STATUS:
7430 return elfcore_grok_nto_status (abfd, note, &tid);
7431 case BFD_QNT_CORE_GREG:
7432 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
7433 case BFD_QNT_CORE_FPREG:
7434 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
7440 /* Function: elfcore_write_note
7447 size of data for note
7450 End of buffer containing note. */
7453 elfcore_write_note (bfd *abfd,
7461 Elf_External_Note *xnp;
7471 const struct elf_backend_data *bed;
7473 namesz = strlen (name) + 1;
7474 bed = get_elf_backend_data (abfd);
7475 pad = -namesz & ((1 << bed->s->log_file_align) - 1);
7478 newspace = 12 + namesz + pad + size;
7480 p = realloc (buf, *bufsiz + newspace);
7482 *bufsiz += newspace;
7483 xnp = (Elf_External_Note *) dest;
7484 H_PUT_32 (abfd, namesz, xnp->namesz);
7485 H_PUT_32 (abfd, size, xnp->descsz);
7486 H_PUT_32 (abfd, type, xnp->type);
7490 memcpy (dest, name, namesz);
7498 memcpy (dest, input, size);
7502 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7504 elfcore_write_prpsinfo (bfd *abfd,
7511 char *note_name = "CORE";
7513 #if defined (HAVE_PSINFO_T)
7515 note_type = NT_PSINFO;
7518 note_type = NT_PRPSINFO;
7521 memset (&data, 0, sizeof (data));
7522 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
7523 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
7524 return elfcore_write_note (abfd, buf, bufsiz,
7525 note_name, note_type, &data, sizeof (data));
7527 #endif /* PSINFO_T or PRPSINFO_T */
7529 #if defined (HAVE_PRSTATUS_T)
7531 elfcore_write_prstatus (bfd *abfd,
7539 char *note_name = "CORE";
7541 memset (&prstat, 0, sizeof (prstat));
7542 prstat.pr_pid = pid;
7543 prstat.pr_cursig = cursig;
7544 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
7545 return elfcore_write_note (abfd, buf, bufsiz,
7546 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
7548 #endif /* HAVE_PRSTATUS_T */
7550 #if defined (HAVE_LWPSTATUS_T)
7552 elfcore_write_lwpstatus (bfd *abfd,
7559 lwpstatus_t lwpstat;
7560 char *note_name = "CORE";
7562 memset (&lwpstat, 0, sizeof (lwpstat));
7563 lwpstat.pr_lwpid = pid >> 16;
7564 lwpstat.pr_cursig = cursig;
7565 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7566 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
7567 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7569 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
7570 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
7572 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
7573 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
7576 return elfcore_write_note (abfd, buf, bufsiz, note_name,
7577 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
7579 #endif /* HAVE_LWPSTATUS_T */
7581 #if defined (HAVE_PSTATUS_T)
7583 elfcore_write_pstatus (bfd *abfd,
7591 char *note_name = "CORE";
7593 memset (&pstat, 0, sizeof (pstat));
7594 pstat.pr_pid = pid & 0xffff;
7595 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
7596 NT_PSTATUS, &pstat, sizeof (pstat));
7599 #endif /* HAVE_PSTATUS_T */
7602 elfcore_write_prfpreg (bfd *abfd,
7608 char *note_name = "CORE";
7609 return elfcore_write_note (abfd, buf, bufsiz,
7610 note_name, NT_FPREGSET, fpregs, size);
7614 elfcore_write_prxfpreg (bfd *abfd,
7617 const void *xfpregs,
7620 char *note_name = "LINUX";
7621 return elfcore_write_note (abfd, buf, bufsiz,
7622 note_name, NT_PRXFPREG, xfpregs, size);
7626 elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
7634 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
7637 buf = bfd_malloc (size);
7641 if (bfd_bread (buf, size, abfd) != size)
7649 while (p < buf + size)
7651 /* FIXME: bad alignment assumption. */
7652 Elf_External_Note *xnp = (Elf_External_Note *) p;
7653 Elf_Internal_Note in;
7655 in.type = H_GET_32 (abfd, xnp->type);
7657 in.namesz = H_GET_32 (abfd, xnp->namesz);
7658 in.namedata = xnp->name;
7660 in.descsz = H_GET_32 (abfd, xnp->descsz);
7661 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7662 in.descpos = offset + (in.descdata - buf);
7664 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7666 if (! elfcore_grok_netbsd_note (abfd, &in))
7669 else if (strncmp (in.namedata, "QNX", 3) == 0)
7671 if (! elfcore_grok_nto_note (abfd, &in))
7676 if (! elfcore_grok_note (abfd, &in))
7680 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7687 /* Providing external access to the ELF program header table. */
7689 /* Return an upper bound on the number of bytes required to store a
7690 copy of ABFD's program header table entries. Return -1 if an error
7691 occurs; bfd_get_error will return an appropriate code. */
7694 bfd_get_elf_phdr_upper_bound (bfd *abfd)
7696 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7698 bfd_set_error (bfd_error_wrong_format);
7702 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
7705 /* Copy ABFD's program header table entries to *PHDRS. The entries
7706 will be stored as an array of Elf_Internal_Phdr structures, as
7707 defined in include/elf/internal.h. To find out how large the
7708 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7710 Return the number of program header table entries read, or -1 if an
7711 error occurs; bfd_get_error will return an appropriate code. */
7714 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
7718 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7720 bfd_set_error (bfd_error_wrong_format);
7724 num_phdrs = elf_elfheader (abfd)->e_phnum;
7725 memcpy (phdrs, elf_tdata (abfd)->phdr,
7726 num_phdrs * sizeof (Elf_Internal_Phdr));
7732 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
7735 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7737 i_ehdrp = elf_elfheader (abfd);
7738 if (i_ehdrp == NULL)
7739 sprintf_vma (buf, value);
7742 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7744 #if BFD_HOST_64BIT_LONG
7745 sprintf (buf, "%016lx", value);
7747 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
7748 _bfd_int64_low (value));
7752 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
7755 sprintf_vma (buf, value);
7760 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
7763 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7765 i_ehdrp = elf_elfheader (abfd);
7766 if (i_ehdrp == NULL)
7767 fprintf_vma ((FILE *) stream, value);
7770 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7772 #if BFD_HOST_64BIT_LONG
7773 fprintf ((FILE *) stream, "%016lx", value);
7775 fprintf ((FILE *) stream, "%08lx%08lx",
7776 _bfd_int64_high (value), _bfd_int64_low (value));
7780 fprintf ((FILE *) stream, "%08lx",
7781 (unsigned long) (value & 0xffffffff));
7784 fprintf_vma ((FILE *) stream, value);
7788 enum elf_reloc_type_class
7789 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
7791 return reloc_class_normal;
7794 /* For RELA architectures, return the relocation value for a
7795 relocation against a local symbol. */
7798 _bfd_elf_rela_local_sym (bfd *abfd,
7799 Elf_Internal_Sym *sym,
7801 Elf_Internal_Rela *rel)
7803 asection *sec = *psec;
7806 relocation = (sec->output_section->vma
7807 + sec->output_offset
7809 if ((sec->flags & SEC_MERGE)
7810 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
7811 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
7814 _bfd_merged_section_offset (abfd, psec,
7815 elf_section_data (sec)->sec_info,
7816 sym->st_value + rel->r_addend);
7819 /* If we have changed the section, and our original section is
7820 marked with SEC_EXCLUDE, it means that the original
7821 SEC_MERGE section has been completely subsumed in some
7822 other SEC_MERGE section. In this case, we need to leave
7823 some info around for --emit-relocs. */
7824 if ((sec->flags & SEC_EXCLUDE) != 0)
7825 sec->kept_section = *psec;
7828 rel->r_addend -= relocation;
7829 rel->r_addend += sec->output_section->vma + sec->output_offset;
7835 _bfd_elf_rel_local_sym (bfd *abfd,
7836 Elf_Internal_Sym *sym,
7840 asection *sec = *psec;
7842 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
7843 return sym->st_value + addend;
7845 return _bfd_merged_section_offset (abfd, psec,
7846 elf_section_data (sec)->sec_info,
7847 sym->st_value + addend);
7851 _bfd_elf_section_offset (bfd *abfd,
7852 struct bfd_link_info *info,
7856 switch (sec->sec_info_type)
7858 case ELF_INFO_TYPE_STABS:
7859 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
7861 case ELF_INFO_TYPE_EH_FRAME:
7862 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
7868 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7869 reconstruct an ELF file by reading the segments out of remote memory
7870 based on the ELF file header at EHDR_VMA and the ELF program headers it
7871 points to. If not null, *LOADBASEP is filled in with the difference
7872 between the VMAs from which the segments were read, and the VMAs the
7873 file headers (and hence BFD's idea of each section's VMA) put them at.
7875 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7876 remote memory at target address VMA into the local buffer at MYADDR; it
7877 should return zero on success or an `errno' code on failure. TEMPL must
7878 be a BFD for an ELF target with the word size and byte order found in
7879 the remote memory. */
7882 bfd_elf_bfd_from_remote_memory
7886 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
7888 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
7889 (templ, ehdr_vma, loadbasep, target_read_memory);
7893 _bfd_elf_get_synthetic_symtab (bfd *abfd,
7894 long symcount ATTRIBUTE_UNUSED,
7895 asymbol **syms ATTRIBUTE_UNUSED,
7900 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7903 const char *relplt_name;
7904 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
7908 Elf_Internal_Shdr *hdr;
7914 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
7917 if (dynsymcount <= 0)
7920 if (!bed->plt_sym_val)
7923 relplt_name = bed->relplt_name;
7924 if (relplt_name == NULL)
7925 relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
7926 relplt = bfd_get_section_by_name (abfd, relplt_name);
7930 hdr = &elf_section_data (relplt)->this_hdr;
7931 if (hdr->sh_link != elf_dynsymtab (abfd)
7932 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
7935 plt = bfd_get_section_by_name (abfd, ".plt");
7939 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
7940 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
7943 count = relplt->size / hdr->sh_entsize;
7944 size = count * sizeof (asymbol);
7945 p = relplt->relocation;
7946 for (i = 0; i < count; i++, s++, p++)
7947 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
7949 s = *ret = bfd_malloc (size);
7953 names = (char *) (s + count);
7954 p = relplt->relocation;
7956 for (i = 0; i < count; i++, s++, p++)
7961 addr = bed->plt_sym_val (i, plt, p);
7962 if (addr == (bfd_vma) -1)
7965 *s = **p->sym_ptr_ptr;
7967 s->value = addr - plt->vma;
7969 len = strlen ((*p->sym_ptr_ptr)->name);
7970 memcpy (names, (*p->sym_ptr_ptr)->name, len);
7972 memcpy (names, "@plt", sizeof ("@plt"));
7973 names += sizeof ("@plt");
7980 /* Sort symbol by binding and section. We want to put definitions
7981 sorted by section at the beginning. */
7984 elf_sort_elf_symbol (const void *arg1, const void *arg2)
7986 const Elf_Internal_Sym *s1;
7987 const Elf_Internal_Sym *s2;
7990 /* Make sure that undefined symbols are at the end. */
7991 s1 = (const Elf_Internal_Sym *) arg1;
7992 if (s1->st_shndx == SHN_UNDEF)
7994 s2 = (const Elf_Internal_Sym *) arg2;
7995 if (s2->st_shndx == SHN_UNDEF)
7998 /* Sorted by section index. */
7999 shndx = s1->st_shndx - s2->st_shndx;
8003 /* Sorted by binding. */
8004 return ELF_ST_BIND (s1->st_info) - ELF_ST_BIND (s2->st_info);
8009 Elf_Internal_Sym *sym;
8014 elf_sym_name_compare (const void *arg1, const void *arg2)
8016 const struct elf_symbol *s1 = (const struct elf_symbol *) arg1;
8017 const struct elf_symbol *s2 = (const struct elf_symbol *) arg2;
8018 return strcmp (s1->name, s2->name);
8021 /* Check if 2 sections define the same set of local and global
8025 bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2)
8028 const struct elf_backend_data *bed1, *bed2;
8029 Elf_Internal_Shdr *hdr1, *hdr2;
8030 bfd_size_type symcount1, symcount2;
8031 Elf_Internal_Sym *isymbuf1, *isymbuf2;
8032 Elf_Internal_Sym *isymstart1 = NULL, *isymstart2 = NULL, *isym;
8033 Elf_Internal_Sym *isymend;
8034 struct elf_symbol *symp, *symtable1 = NULL, *symtable2 = NULL;
8035 bfd_size_type count1, count2, i;
8042 /* If both are .gnu.linkonce sections, they have to have the same
8044 if (strncmp (sec1->name, ".gnu.linkonce",
8045 sizeof ".gnu.linkonce" - 1) == 0
8046 && strncmp (sec2->name, ".gnu.linkonce",
8047 sizeof ".gnu.linkonce" - 1) == 0)
8048 return strcmp (sec1->name + sizeof ".gnu.linkonce",
8049 sec2->name + sizeof ".gnu.linkonce") == 0;
8051 /* Both sections have to be in ELF. */
8052 if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour
8053 || bfd_get_flavour (bfd2) != bfd_target_elf_flavour)
8056 if (elf_section_type (sec1) != elf_section_type (sec2))
8059 if ((elf_section_flags (sec1) & SHF_GROUP) != 0
8060 && (elf_section_flags (sec2) & SHF_GROUP) != 0)
8062 /* If both are members of section groups, they have to have the
8064 if (strcmp (elf_group_name (sec1), elf_group_name (sec2)) != 0)
8068 shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1);
8069 shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2);
8070 if (shndx1 == -1 || shndx2 == -1)
8073 bed1 = get_elf_backend_data (bfd1);
8074 bed2 = get_elf_backend_data (bfd2);
8075 hdr1 = &elf_tdata (bfd1)->symtab_hdr;
8076 symcount1 = hdr1->sh_size / bed1->s->sizeof_sym;
8077 hdr2 = &elf_tdata (bfd2)->symtab_hdr;
8078 symcount2 = hdr2->sh_size / bed2->s->sizeof_sym;
8080 if (symcount1 == 0 || symcount2 == 0)
8083 isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0,
8085 isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0,
8089 if (isymbuf1 == NULL || isymbuf2 == NULL)
8092 /* Sort symbols by binding and section. Global definitions are at
8094 qsort (isymbuf1, symcount1, sizeof (Elf_Internal_Sym),
8095 elf_sort_elf_symbol);
8096 qsort (isymbuf2, symcount2, sizeof (Elf_Internal_Sym),
8097 elf_sort_elf_symbol);
8099 /* Count definitions in the section. */
8101 for (isym = isymbuf1, isymend = isym + symcount1;
8102 isym < isymend; isym++)
8104 if (isym->st_shndx == (unsigned int) shndx1)
8111 if (count1 && isym->st_shndx != (unsigned int) shndx1)
8116 for (isym = isymbuf2, isymend = isym + symcount2;
8117 isym < isymend; isym++)
8119 if (isym->st_shndx == (unsigned int) shndx2)
8126 if (count2 && isym->st_shndx != (unsigned int) shndx2)
8130 if (count1 == 0 || count2 == 0 || count1 != count2)
8133 symtable1 = bfd_malloc (count1 * sizeof (struct elf_symbol));
8134 symtable2 = bfd_malloc (count1 * sizeof (struct elf_symbol));
8136 if (symtable1 == NULL || symtable2 == NULL)
8140 for (isym = isymstart1, isymend = isym + count1;
8141 isym < isymend; isym++)
8144 symp->name = bfd_elf_string_from_elf_section (bfd1,
8151 for (isym = isymstart2, isymend = isym + count1;
8152 isym < isymend; isym++)
8155 symp->name = bfd_elf_string_from_elf_section (bfd2,
8161 /* Sort symbol by name. */
8162 qsort (symtable1, count1, sizeof (struct elf_symbol),
8163 elf_sym_name_compare);
8164 qsort (symtable2, count1, sizeof (struct elf_symbol),
8165 elf_sym_name_compare);
8167 for (i = 0; i < count1; i++)
8168 /* Two symbols must have the same binding, type and name. */
8169 if (symtable1 [i].sym->st_info != symtable2 [i].sym->st_info
8170 || symtable1 [i].sym->st_other != symtable2 [i].sym->st_other
8171 || strcmp (symtable1 [i].name, symtable2 [i].name) != 0)