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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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,
414 unsigned int iname = isym->st_name;
415 unsigned int shindex = symtab_hdr->sh_link;
417 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
418 /* Check for a bogus st_shndx to avoid crashing. */
419 && isym->st_shndx < elf_numsections (abfd)
420 && !(isym->st_shndx >= SHN_LORESERVE && isym->st_shndx <= SHN_HIRESERVE))
422 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
423 shindex = elf_elfheader (abfd)->e_shstrndx;
426 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
429 else if (sym_sec && *name == '\0')
430 name = bfd_section_name (abfd, sym_sec);
435 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
436 sections. The first element is the flags, the rest are section
439 typedef union elf_internal_group {
440 Elf_Internal_Shdr *shdr;
442 } Elf_Internal_Group;
444 /* Return the name of the group signature symbol. Why isn't the
445 signature just a string? */
448 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
450 Elf_Internal_Shdr *hdr;
451 unsigned char esym[sizeof (Elf64_External_Sym)];
452 Elf_External_Sym_Shndx eshndx;
453 Elf_Internal_Sym isym;
455 /* First we need to ensure the symbol table is available. Make sure
456 that it is a symbol table section. */
457 hdr = elf_elfsections (abfd) [ghdr->sh_link];
458 if (hdr->sh_type != SHT_SYMTAB
459 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
462 /* Go read the symbol. */
463 hdr = &elf_tdata (abfd)->symtab_hdr;
464 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
465 &isym, esym, &eshndx) == NULL)
468 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
471 /* Set next_in_group list pointer, and group name for NEWSECT. */
474 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
476 unsigned int num_group = elf_tdata (abfd)->num_group;
478 /* If num_group is zero, read in all SHT_GROUP sections. The count
479 is set to -1 if there are no SHT_GROUP sections. */
482 unsigned int i, shnum;
484 /* First count the number of groups. If we have a SHT_GROUP
485 section with just a flag word (ie. sh_size is 4), ignore it. */
486 shnum = elf_numsections (abfd);
488 for (i = 0; i < shnum; i++)
490 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
491 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
497 num_group = (unsigned) -1;
498 elf_tdata (abfd)->num_group = num_group;
502 /* We keep a list of elf section headers for group sections,
503 so we can find them quickly. */
506 elf_tdata (abfd)->num_group = num_group;
507 amt = num_group * sizeof (Elf_Internal_Shdr *);
508 elf_tdata (abfd)->group_sect_ptr = bfd_alloc (abfd, amt);
509 if (elf_tdata (abfd)->group_sect_ptr == NULL)
513 for (i = 0; i < shnum; i++)
515 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
516 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
519 Elf_Internal_Group *dest;
521 /* Add to list of sections. */
522 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
525 /* Read the raw contents. */
526 BFD_ASSERT (sizeof (*dest) >= 4);
527 amt = shdr->sh_size * sizeof (*dest) / 4;
528 shdr->contents = bfd_alloc (abfd, amt);
529 if (shdr->contents == NULL
530 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
531 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
535 /* Translate raw contents, a flag word followed by an
536 array of elf section indices all in target byte order,
537 to the flag word followed by an array of elf section
539 src = shdr->contents + shdr->sh_size;
540 dest = (Elf_Internal_Group *) (shdr->contents + amt);
547 idx = H_GET_32 (abfd, src);
548 if (src == shdr->contents)
551 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
552 shdr->bfd_section->flags
553 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
558 ((*_bfd_error_handler)
559 (_("%B: invalid SHT_GROUP entry"), abfd));
562 dest->shdr = elf_elfsections (abfd)[idx];
569 if (num_group != (unsigned) -1)
573 for (i = 0; i < num_group; i++)
575 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
576 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
577 unsigned int n_elt = shdr->sh_size / 4;
579 /* Look through this group's sections to see if current
580 section is a member. */
582 if ((++idx)->shdr == hdr)
586 /* We are a member of this group. Go looking through
587 other members to see if any others are linked via
589 idx = (Elf_Internal_Group *) shdr->contents;
590 n_elt = shdr->sh_size / 4;
592 if ((s = (++idx)->shdr->bfd_section) != NULL
593 && elf_next_in_group (s) != NULL)
597 /* Snarf the group name from other member, and
598 insert current section in circular list. */
599 elf_group_name (newsect) = elf_group_name (s);
600 elf_next_in_group (newsect) = elf_next_in_group (s);
601 elf_next_in_group (s) = newsect;
607 gname = group_signature (abfd, shdr);
610 elf_group_name (newsect) = gname;
612 /* Start a circular list with one element. */
613 elf_next_in_group (newsect) = newsect;
616 /* If the group section has been created, point to the
618 if (shdr->bfd_section != NULL)
619 elf_next_in_group (shdr->bfd_section) = newsect;
627 if (elf_group_name (newsect) == NULL)
629 (*_bfd_error_handler) (_("%B: no group info for section %A"),
636 _bfd_elf_setup_group_pointers (bfd *abfd)
639 unsigned int num_group = elf_tdata (abfd)->num_group;
640 bfd_boolean result = TRUE;
642 if (num_group == (unsigned) -1)
645 for (i = 0; i < num_group; i++)
647 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
648 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
649 unsigned int n_elt = shdr->sh_size / 4;
652 if ((++idx)->shdr->bfd_section)
653 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
654 else if (idx->shdr->sh_type == SHT_RELA
655 || idx->shdr->sh_type == SHT_REL)
656 /* We won't include relocation sections in section groups in
657 output object files. We adjust the group section size here
658 so that relocatable link will work correctly when
659 relocation sections are in section group in input object
661 shdr->bfd_section->size -= 4;
664 /* There are some unknown sections in the group. */
665 (*_bfd_error_handler)
666 (_("%B: unknown [%d] section `%s' in group [%s]"),
668 (unsigned int) idx->shdr->sh_type,
669 bfd_elf_string_from_elf_section (abfd,
670 (elf_elfheader (abfd)
673 shdr->bfd_section->name);
681 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
683 return elf_next_in_group (sec) != NULL;
686 /* Make a BFD section from an ELF section. We store a pointer to the
687 BFD section in the bfd_section field of the header. */
690 _bfd_elf_make_section_from_shdr (bfd *abfd,
691 Elf_Internal_Shdr *hdr,
697 const struct elf_backend_data *bed;
699 if (hdr->bfd_section != NULL)
701 BFD_ASSERT (strcmp (name,
702 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
706 newsect = bfd_make_section_anyway (abfd, name);
710 hdr->bfd_section = newsect;
711 elf_section_data (newsect)->this_hdr = *hdr;
712 elf_section_data (newsect)->this_idx = shindex;
714 /* Always use the real type/flags. */
715 elf_section_type (newsect) = hdr->sh_type;
716 elf_section_flags (newsect) = hdr->sh_flags;
718 newsect->filepos = hdr->sh_offset;
720 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
721 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
722 || ! bfd_set_section_alignment (abfd, newsect,
723 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
726 flags = SEC_NO_FLAGS;
727 if (hdr->sh_type != SHT_NOBITS)
728 flags |= SEC_HAS_CONTENTS;
729 if (hdr->sh_type == SHT_GROUP)
730 flags |= SEC_GROUP | SEC_EXCLUDE;
731 if ((hdr->sh_flags & SHF_ALLOC) != 0)
734 if (hdr->sh_type != SHT_NOBITS)
737 if ((hdr->sh_flags & SHF_WRITE) == 0)
738 flags |= SEC_READONLY;
739 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
741 else if ((flags & SEC_LOAD) != 0)
743 if ((hdr->sh_flags & SHF_MERGE) != 0)
746 newsect->entsize = hdr->sh_entsize;
747 if ((hdr->sh_flags & SHF_STRINGS) != 0)
748 flags |= SEC_STRINGS;
750 if (hdr->sh_flags & SHF_GROUP)
751 if (!setup_group (abfd, hdr, newsect))
753 if ((hdr->sh_flags & SHF_TLS) != 0)
754 flags |= SEC_THREAD_LOCAL;
756 if ((flags & SEC_ALLOC) == 0)
758 /* The debugging sections appear to be recognized only by name,
759 not any sort of flag. Their SEC_ALLOC bits are cleared. */
764 } debug_sections [] =
766 { "debug", 5 }, /* 'd' */
767 { NULL, 0 }, /* 'e' */
768 { NULL, 0 }, /* 'f' */
769 { "gnu.linkonce.wi.", 17 }, /* 'g' */
770 { NULL, 0 }, /* 'h' */
771 { NULL, 0 }, /* 'i' */
772 { NULL, 0 }, /* 'j' */
773 { NULL, 0 }, /* 'k' */
774 { "line", 4 }, /* 'l' */
775 { NULL, 0 }, /* 'm' */
776 { NULL, 0 }, /* 'n' */
777 { NULL, 0 }, /* 'o' */
778 { NULL, 0 }, /* 'p' */
779 { NULL, 0 }, /* 'q' */
780 { NULL, 0 }, /* 'r' */
781 { "stab", 4 } /* 's' */
786 int i = name [1] - 'd';
788 && i < (int) ARRAY_SIZE (debug_sections)
789 && debug_sections [i].name != NULL
790 && strncmp (&name [1], debug_sections [i].name,
791 debug_sections [i].len) == 0)
792 flags |= SEC_DEBUGGING;
796 /* As a GNU extension, if the name begins with .gnu.linkonce, we
797 only link a single copy of the section. This is used to support
798 g++. g++ will emit each template expansion in its own section.
799 The symbols will be defined as weak, so that multiple definitions
800 are permitted. The GNU linker extension is to actually discard
801 all but one of the sections. */
802 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
803 && elf_next_in_group (newsect) == NULL)
804 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
806 bed = get_elf_backend_data (abfd);
807 if (bed->elf_backend_section_flags)
808 if (! bed->elf_backend_section_flags (&flags, hdr))
811 if (! bfd_set_section_flags (abfd, newsect, flags))
814 if ((flags & SEC_ALLOC) != 0)
816 Elf_Internal_Phdr *phdr;
819 /* Look through the phdrs to see if we need to adjust the lma.
820 If all the p_paddr fields are zero, we ignore them, since
821 some ELF linkers produce such output. */
822 phdr = elf_tdata (abfd)->phdr;
823 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
825 if (phdr->p_paddr != 0)
828 if (i < elf_elfheader (abfd)->e_phnum)
830 phdr = elf_tdata (abfd)->phdr;
831 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
833 /* This section is part of this segment if its file
834 offset plus size lies within the segment's memory
835 span and, if the section is loaded, the extent of the
836 loaded data lies within the extent of the segment.
838 Note - we used to check the p_paddr field as well, and
839 refuse to set the LMA if it was 0. This is wrong
840 though, as a perfectly valid initialised segment can
841 have a p_paddr of zero. Some architectures, eg ARM,
842 place special significance on the address 0 and
843 executables need to be able to have a segment which
844 covers this address. */
845 if (phdr->p_type == PT_LOAD
846 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
847 && (hdr->sh_offset + hdr->sh_size
848 <= phdr->p_offset + phdr->p_memsz)
849 && ((flags & SEC_LOAD) == 0
850 || (hdr->sh_offset + hdr->sh_size
851 <= phdr->p_offset + phdr->p_filesz)))
853 if ((flags & SEC_LOAD) == 0)
854 newsect->lma = (phdr->p_paddr
855 + hdr->sh_addr - phdr->p_vaddr);
857 /* We used to use the same adjustment for SEC_LOAD
858 sections, but that doesn't work if the segment
859 is packed with code from multiple VMAs.
860 Instead we calculate the section LMA based on
861 the segment LMA. It is assumed that the
862 segment will contain sections with contiguous
863 LMAs, even if the VMAs are not. */
864 newsect->lma = (phdr->p_paddr
865 + hdr->sh_offset - phdr->p_offset);
867 /* With contiguous segments, we can't tell from file
868 offsets whether a section with zero size should
869 be placed at the end of one segment or the
870 beginning of the next. Decide based on vaddr. */
871 if (hdr->sh_addr >= phdr->p_vaddr
872 && (hdr->sh_addr + hdr->sh_size
873 <= phdr->p_vaddr + phdr->p_memsz))
888 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
891 Helper functions for GDB to locate the string tables.
892 Since BFD hides string tables from callers, GDB needs to use an
893 internal hook to find them. Sun's .stabstr, in particular,
894 isn't even pointed to by the .stab section, so ordinary
895 mechanisms wouldn't work to find it, even if we had some.
898 struct elf_internal_shdr *
899 bfd_elf_find_section (bfd *abfd, char *name)
901 Elf_Internal_Shdr **i_shdrp;
906 i_shdrp = elf_elfsections (abfd);
909 shstrtab = bfd_elf_get_str_section (abfd,
910 elf_elfheader (abfd)->e_shstrndx);
911 if (shstrtab != NULL)
913 max = elf_numsections (abfd);
914 for (i = 1; i < max; i++)
915 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
922 const char *const bfd_elf_section_type_names[] = {
923 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
924 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
925 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
928 /* ELF relocs are against symbols. If we are producing relocatable
929 output, and the reloc is against an external symbol, and nothing
930 has given us any additional addend, the resulting reloc will also
931 be against the same symbol. In such a case, we don't want to
932 change anything about the way the reloc is handled, since it will
933 all be done at final link time. Rather than put special case code
934 into bfd_perform_relocation, all the reloc types use this howto
935 function. It just short circuits the reloc if producing
936 relocatable output against an external symbol. */
938 bfd_reloc_status_type
939 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
940 arelent *reloc_entry,
942 void *data ATTRIBUTE_UNUSED,
943 asection *input_section,
945 char **error_message ATTRIBUTE_UNUSED)
947 if (output_bfd != NULL
948 && (symbol->flags & BSF_SECTION_SYM) == 0
949 && (! reloc_entry->howto->partial_inplace
950 || reloc_entry->addend == 0))
952 reloc_entry->address += input_section->output_offset;
956 return bfd_reloc_continue;
959 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
962 merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED,
965 BFD_ASSERT (sec->sec_info_type == ELF_INFO_TYPE_MERGE);
966 sec->sec_info_type = ELF_INFO_TYPE_NONE;
969 /* Finish SHF_MERGE section merging. */
972 _bfd_elf_merge_sections (bfd *abfd, struct bfd_link_info *info)
977 if (!is_elf_hash_table (info->hash))
980 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
981 if ((ibfd->flags & DYNAMIC) == 0)
982 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
983 if ((sec->flags & SEC_MERGE) != 0
984 && !bfd_is_abs_section (sec->output_section))
986 struct bfd_elf_section_data *secdata;
988 secdata = elf_section_data (sec);
989 if (! _bfd_add_merge_section (abfd,
990 &elf_hash_table (info)->merge_info,
991 sec, &secdata->sec_info))
993 else if (secdata->sec_info)
994 sec->sec_info_type = ELF_INFO_TYPE_MERGE;
997 if (elf_hash_table (info)->merge_info != NULL)
998 _bfd_merge_sections (abfd, info, elf_hash_table (info)->merge_info,
999 merge_sections_remove_hook);
1004 _bfd_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
1006 sec->output_section = bfd_abs_section_ptr;
1007 sec->output_offset = sec->vma;
1008 if (!is_elf_hash_table (info->hash))
1011 sec->sec_info_type = ELF_INFO_TYPE_JUST_SYMS;
1014 /* Copy the program header and other data from one object module to
1018 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1020 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1021 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1024 BFD_ASSERT (!elf_flags_init (obfd)
1025 || (elf_elfheader (obfd)->e_flags
1026 == elf_elfheader (ibfd)->e_flags));
1028 elf_gp (obfd) = elf_gp (ibfd);
1029 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1030 elf_flags_init (obfd) = TRUE;
1034 /* Print out the program headers. */
1037 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1040 Elf_Internal_Phdr *p;
1042 bfd_byte *dynbuf = NULL;
1044 p = elf_tdata (abfd)->phdr;
1049 fprintf (f, _("\nProgram Header:\n"));
1050 c = elf_elfheader (abfd)->e_phnum;
1051 for (i = 0; i < c; i++, p++)
1058 case PT_NULL: pt = "NULL"; break;
1059 case PT_LOAD: pt = "LOAD"; break;
1060 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1061 case PT_INTERP: pt = "INTERP"; break;
1062 case PT_NOTE: pt = "NOTE"; break;
1063 case PT_SHLIB: pt = "SHLIB"; break;
1064 case PT_PHDR: pt = "PHDR"; break;
1065 case PT_TLS: pt = "TLS"; break;
1066 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1067 case PT_GNU_STACK: pt = "STACK"; break;
1068 case PT_GNU_RELRO: pt = "RELRO"; break;
1069 default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
1071 fprintf (f, "%8s off 0x", pt);
1072 bfd_fprintf_vma (abfd, f, p->p_offset);
1073 fprintf (f, " vaddr 0x");
1074 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1075 fprintf (f, " paddr 0x");
1076 bfd_fprintf_vma (abfd, f, p->p_paddr);
1077 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1078 fprintf (f, " filesz 0x");
1079 bfd_fprintf_vma (abfd, f, p->p_filesz);
1080 fprintf (f, " memsz 0x");
1081 bfd_fprintf_vma (abfd, f, p->p_memsz);
1082 fprintf (f, " flags %c%c%c",
1083 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1084 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1085 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1086 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1087 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1092 s = bfd_get_section_by_name (abfd, ".dynamic");
1096 unsigned long shlink;
1097 bfd_byte *extdyn, *extdynend;
1099 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1101 fprintf (f, _("\nDynamic Section:\n"));
1103 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1106 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1109 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1111 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1112 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1115 extdynend = extdyn + s->size;
1116 for (; extdyn < extdynend; extdyn += extdynsize)
1118 Elf_Internal_Dyn dyn;
1121 bfd_boolean stringp;
1123 (*swap_dyn_in) (abfd, extdyn, &dyn);
1125 if (dyn.d_tag == DT_NULL)
1132 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1136 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1137 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1138 case DT_PLTGOT: name = "PLTGOT"; break;
1139 case DT_HASH: name = "HASH"; break;
1140 case DT_STRTAB: name = "STRTAB"; break;
1141 case DT_SYMTAB: name = "SYMTAB"; break;
1142 case DT_RELA: name = "RELA"; break;
1143 case DT_RELASZ: name = "RELASZ"; break;
1144 case DT_RELAENT: name = "RELAENT"; break;
1145 case DT_STRSZ: name = "STRSZ"; break;
1146 case DT_SYMENT: name = "SYMENT"; break;
1147 case DT_INIT: name = "INIT"; break;
1148 case DT_FINI: name = "FINI"; break;
1149 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1150 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1151 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1152 case DT_REL: name = "REL"; break;
1153 case DT_RELSZ: name = "RELSZ"; break;
1154 case DT_RELENT: name = "RELENT"; break;
1155 case DT_PLTREL: name = "PLTREL"; break;
1156 case DT_DEBUG: name = "DEBUG"; break;
1157 case DT_TEXTREL: name = "TEXTREL"; break;
1158 case DT_JMPREL: name = "JMPREL"; break;
1159 case DT_BIND_NOW: name = "BIND_NOW"; break;
1160 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1161 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1162 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1163 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1164 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1165 case DT_FLAGS: name = "FLAGS"; break;
1166 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1167 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1168 case DT_CHECKSUM: name = "CHECKSUM"; break;
1169 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1170 case DT_MOVEENT: name = "MOVEENT"; break;
1171 case DT_MOVESZ: name = "MOVESZ"; break;
1172 case DT_FEATURE: name = "FEATURE"; break;
1173 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1174 case DT_SYMINSZ: name = "SYMINSZ"; break;
1175 case DT_SYMINENT: name = "SYMINENT"; break;
1176 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1177 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1178 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1179 case DT_PLTPAD: name = "PLTPAD"; break;
1180 case DT_MOVETAB: name = "MOVETAB"; break;
1181 case DT_SYMINFO: name = "SYMINFO"; break;
1182 case DT_RELACOUNT: name = "RELACOUNT"; break;
1183 case DT_RELCOUNT: name = "RELCOUNT"; break;
1184 case DT_FLAGS_1: name = "FLAGS_1"; break;
1185 case DT_VERSYM: name = "VERSYM"; break;
1186 case DT_VERDEF: name = "VERDEF"; break;
1187 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1188 case DT_VERNEED: name = "VERNEED"; break;
1189 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1190 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1191 case DT_USED: name = "USED"; break;
1192 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1195 fprintf (f, " %-11s ", name);
1197 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1201 unsigned int tagv = dyn.d_un.d_val;
1203 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1206 fprintf (f, "%s", string);
1215 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1216 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1218 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1222 if (elf_dynverdef (abfd) != 0)
1224 Elf_Internal_Verdef *t;
1226 fprintf (f, _("\nVersion definitions:\n"));
1227 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1229 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1230 t->vd_flags, t->vd_hash, t->vd_nodename);
1231 if (t->vd_auxptr->vda_nextptr != NULL)
1233 Elf_Internal_Verdaux *a;
1236 for (a = t->vd_auxptr->vda_nextptr;
1239 fprintf (f, "%s ", a->vda_nodename);
1245 if (elf_dynverref (abfd) != 0)
1247 Elf_Internal_Verneed *t;
1249 fprintf (f, _("\nVersion References:\n"));
1250 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1252 Elf_Internal_Vernaux *a;
1254 fprintf (f, _(" required from %s:\n"), t->vn_filename);
1255 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1256 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1257 a->vna_flags, a->vna_other, a->vna_nodename);
1269 /* Display ELF-specific fields of a symbol. */
1272 bfd_elf_print_symbol (bfd *abfd,
1275 bfd_print_symbol_type how)
1280 case bfd_print_symbol_name:
1281 fprintf (file, "%s", symbol->name);
1283 case bfd_print_symbol_more:
1284 fprintf (file, "elf ");
1285 bfd_fprintf_vma (abfd, file, symbol->value);
1286 fprintf (file, " %lx", (long) symbol->flags);
1288 case bfd_print_symbol_all:
1290 const char *section_name;
1291 const char *name = NULL;
1292 const struct elf_backend_data *bed;
1293 unsigned char st_other;
1296 section_name = symbol->section ? symbol->section->name : "(*none*)";
1298 bed = get_elf_backend_data (abfd);
1299 if (bed->elf_backend_print_symbol_all)
1300 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1304 name = symbol->name;
1305 bfd_print_symbol_vandf (abfd, file, symbol);
1308 fprintf (file, " %s\t", section_name);
1309 /* Print the "other" value for a symbol. For common symbols,
1310 we've already printed the size; now print the alignment.
1311 For other symbols, we have no specified alignment, and
1312 we've printed the address; now print the size. */
1313 if (bfd_is_com_section (symbol->section))
1314 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1316 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1317 bfd_fprintf_vma (abfd, file, val);
1319 /* If we have version information, print it. */
1320 if (elf_tdata (abfd)->dynversym_section != 0
1321 && (elf_tdata (abfd)->dynverdef_section != 0
1322 || elf_tdata (abfd)->dynverref_section != 0))
1324 unsigned int vernum;
1325 const char *version_string;
1327 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1330 version_string = "";
1331 else if (vernum == 1)
1332 version_string = "Base";
1333 else if (vernum <= elf_tdata (abfd)->cverdefs)
1335 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1338 Elf_Internal_Verneed *t;
1340 version_string = "";
1341 for (t = elf_tdata (abfd)->verref;
1345 Elf_Internal_Vernaux *a;
1347 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1349 if (a->vna_other == vernum)
1351 version_string = a->vna_nodename;
1358 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1359 fprintf (file, " %-11s", version_string);
1364 fprintf (file, " (%s)", version_string);
1365 for (i = 10 - strlen (version_string); i > 0; --i)
1370 /* If the st_other field is not zero, print it. */
1371 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1376 case STV_INTERNAL: fprintf (file, " .internal"); break;
1377 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1378 case STV_PROTECTED: fprintf (file, " .protected"); break;
1380 /* Some other non-defined flags are also present, so print
1382 fprintf (file, " 0x%02x", (unsigned int) st_other);
1385 fprintf (file, " %s", name);
1391 /* Create an entry in an ELF linker hash table. */
1393 struct bfd_hash_entry *
1394 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
1395 struct bfd_hash_table *table,
1398 /* Allocate the structure if it has not already been allocated by a
1402 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1407 /* Call the allocation method of the superclass. */
1408 entry = _bfd_link_hash_newfunc (entry, table, string);
1411 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1412 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1414 /* Set local fields. */
1417 ret->got = ret->plt = htab->init_refcount;
1418 memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry)
1419 - offsetof (struct elf_link_hash_entry, size)));
1420 /* Assume that we have been called by a non-ELF symbol reader.
1421 This flag is then reset by the code which reads an ELF input
1422 file. This ensures that a symbol created by a non-ELF symbol
1423 reader will have the flag set correctly. */
1430 /* Copy data from an indirect symbol to its direct symbol, hiding the
1431 old indirect symbol. Also used for copying flags to a weakdef. */
1434 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data *bed,
1435 struct elf_link_hash_entry *dir,
1436 struct elf_link_hash_entry *ind)
1439 bfd_signed_vma lowest_valid = bed->can_refcount;
1441 /* Copy down any references that we may have already seen to the
1442 symbol which just became indirect. */
1444 dir->ref_dynamic |= ind->ref_dynamic;
1445 dir->ref_regular |= ind->ref_regular;
1446 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1447 dir->non_got_ref |= ind->non_got_ref;
1448 dir->needs_plt |= ind->needs_plt;
1449 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1451 if (ind->root.type != bfd_link_hash_indirect)
1454 /* Copy over the global and procedure linkage table refcount entries.
1455 These may have been already set up by a check_relocs routine. */
1456 tmp = dir->got.refcount;
1457 if (tmp < lowest_valid)
1459 dir->got.refcount = ind->got.refcount;
1460 ind->got.refcount = tmp;
1463 BFD_ASSERT (ind->got.refcount < lowest_valid);
1465 tmp = dir->plt.refcount;
1466 if (tmp < lowest_valid)
1468 dir->plt.refcount = ind->plt.refcount;
1469 ind->plt.refcount = tmp;
1472 BFD_ASSERT (ind->plt.refcount < lowest_valid);
1474 if (dir->dynindx == -1)
1476 dir->dynindx = ind->dynindx;
1477 dir->dynstr_index = ind->dynstr_index;
1479 ind->dynstr_index = 0;
1482 BFD_ASSERT (ind->dynindx == -1);
1486 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info,
1487 struct elf_link_hash_entry *h,
1488 bfd_boolean force_local)
1490 h->plt = elf_hash_table (info)->init_offset;
1494 h->forced_local = 1;
1495 if (h->dynindx != -1)
1498 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1504 /* Initialize an ELF linker hash table. */
1507 _bfd_elf_link_hash_table_init
1508 (struct elf_link_hash_table *table,
1510 struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
1511 struct bfd_hash_table *,
1516 table->dynamic_sections_created = FALSE;
1517 table->dynobj = NULL;
1518 /* Make sure can_refcount is extended to the width and signedness of
1519 init_refcount before we subtract one from it. */
1520 table->init_refcount.refcount = get_elf_backend_data (abfd)->can_refcount;
1521 table->init_refcount.refcount -= 1;
1522 table->init_offset.offset = -(bfd_vma) 1;
1523 /* The first dynamic symbol is a dummy. */
1524 table->dynsymcount = 1;
1525 table->dynstr = NULL;
1526 table->bucketcount = 0;
1527 table->needed = NULL;
1529 table->merge_info = NULL;
1530 memset (&table->stab_info, 0, sizeof (table->stab_info));
1531 memset (&table->eh_info, 0, sizeof (table->eh_info));
1532 table->dynlocal = NULL;
1533 table->runpath = NULL;
1534 table->tls_sec = NULL;
1535 table->tls_size = 0;
1536 table->loaded = NULL;
1537 table->is_relocatable_executable = FALSE;
1539 ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc);
1540 table->root.type = bfd_link_elf_hash_table;
1545 /* Create an ELF linker hash table. */
1547 struct bfd_link_hash_table *
1548 _bfd_elf_link_hash_table_create (bfd *abfd)
1550 struct elf_link_hash_table *ret;
1551 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1553 ret = bfd_malloc (amt);
1557 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
1566 /* This is a hook for the ELF emulation code in the generic linker to
1567 tell the backend linker what file name to use for the DT_NEEDED
1568 entry for a dynamic object. */
1571 bfd_elf_set_dt_needed_name (bfd *abfd, const char *name)
1573 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1574 && bfd_get_format (abfd) == bfd_object)
1575 elf_dt_name (abfd) = name;
1579 bfd_elf_get_dyn_lib_class (bfd *abfd)
1582 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1583 && bfd_get_format (abfd) == bfd_object)
1584 lib_class = elf_dyn_lib_class (abfd);
1591 bfd_elf_set_dyn_lib_class (bfd *abfd, int lib_class)
1593 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1594 && bfd_get_format (abfd) == bfd_object)
1595 elf_dyn_lib_class (abfd) = lib_class;
1598 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1599 the linker ELF emulation code. */
1601 struct bfd_link_needed_list *
1602 bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED,
1603 struct bfd_link_info *info)
1605 if (! is_elf_hash_table (info->hash))
1607 return elf_hash_table (info)->needed;
1610 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1611 hook for the linker ELF emulation code. */
1613 struct bfd_link_needed_list *
1614 bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED,
1615 struct bfd_link_info *info)
1617 if (! is_elf_hash_table (info->hash))
1619 return elf_hash_table (info)->runpath;
1622 /* Get the name actually used for a dynamic object for a link. This
1623 is the SONAME entry if there is one. Otherwise, it is the string
1624 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1627 bfd_elf_get_dt_soname (bfd *abfd)
1629 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1630 && bfd_get_format (abfd) == bfd_object)
1631 return elf_dt_name (abfd);
1635 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1636 the ELF linker emulation code. */
1639 bfd_elf_get_bfd_needed_list (bfd *abfd,
1640 struct bfd_link_needed_list **pneeded)
1643 bfd_byte *dynbuf = NULL;
1645 unsigned long shlink;
1646 bfd_byte *extdyn, *extdynend;
1648 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1652 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1653 || bfd_get_format (abfd) != bfd_object)
1656 s = bfd_get_section_by_name (abfd, ".dynamic");
1657 if (s == NULL || s->size == 0)
1660 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1663 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1667 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1669 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1670 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1673 extdynend = extdyn + s->size;
1674 for (; extdyn < extdynend; extdyn += extdynsize)
1676 Elf_Internal_Dyn dyn;
1678 (*swap_dyn_in) (abfd, extdyn, &dyn);
1680 if (dyn.d_tag == DT_NULL)
1683 if (dyn.d_tag == DT_NEEDED)
1686 struct bfd_link_needed_list *l;
1687 unsigned int tagv = dyn.d_un.d_val;
1690 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1695 l = bfd_alloc (abfd, amt);
1716 /* Allocate an ELF string table--force the first byte to be zero. */
1718 struct bfd_strtab_hash *
1719 _bfd_elf_stringtab_init (void)
1721 struct bfd_strtab_hash *ret;
1723 ret = _bfd_stringtab_init ();
1728 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1729 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1730 if (loc == (bfd_size_type) -1)
1732 _bfd_stringtab_free (ret);
1739 /* ELF .o/exec file reading */
1741 /* Create a new bfd section from an ELF section header. */
1744 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1746 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1747 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1748 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1751 name = bfd_elf_string_from_elf_section (abfd,
1752 elf_elfheader (abfd)->e_shstrndx,
1755 switch (hdr->sh_type)
1758 /* Inactive section. Throw it away. */
1761 case SHT_PROGBITS: /* Normal section with contents. */
1762 case SHT_NOBITS: /* .bss section. */
1763 case SHT_HASH: /* .hash section. */
1764 case SHT_NOTE: /* .note section. */
1765 case SHT_INIT_ARRAY: /* .init_array section. */
1766 case SHT_FINI_ARRAY: /* .fini_array section. */
1767 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1768 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1769 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1771 case SHT_DYNAMIC: /* Dynamic linking information. */
1772 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1774 if (hdr->sh_link > elf_numsections (abfd)
1775 || elf_elfsections (abfd)[hdr->sh_link] == NULL)
1777 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1779 Elf_Internal_Shdr *dynsymhdr;
1781 /* The shared libraries distributed with hpux11 have a bogus
1782 sh_link field for the ".dynamic" section. Find the
1783 string table for the ".dynsym" section instead. */
1784 if (elf_dynsymtab (abfd) != 0)
1786 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1787 hdr->sh_link = dynsymhdr->sh_link;
1791 unsigned int i, num_sec;
1793 num_sec = elf_numsections (abfd);
1794 for (i = 1; i < num_sec; i++)
1796 dynsymhdr = elf_elfsections (abfd)[i];
1797 if (dynsymhdr->sh_type == SHT_DYNSYM)
1799 hdr->sh_link = dynsymhdr->sh_link;
1807 case SHT_SYMTAB: /* A symbol table */
1808 if (elf_onesymtab (abfd) == shindex)
1811 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1812 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1813 elf_onesymtab (abfd) = shindex;
1814 elf_tdata (abfd)->symtab_hdr = *hdr;
1815 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1816 abfd->flags |= HAS_SYMS;
1818 /* Sometimes a shared object will map in the symbol table. If
1819 SHF_ALLOC is set, and this is a shared object, then we also
1820 treat this section as a BFD section. We can not base the
1821 decision purely on SHF_ALLOC, because that flag is sometimes
1822 set in a relocatable object file, which would confuse the
1824 if ((hdr->sh_flags & SHF_ALLOC) != 0
1825 && (abfd->flags & DYNAMIC) != 0
1826 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1830 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1831 can't read symbols without that section loaded as well. It
1832 is most likely specified by the next section header. */
1833 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1835 unsigned int i, num_sec;
1837 num_sec = elf_numsections (abfd);
1838 for (i = shindex + 1; i < num_sec; i++)
1840 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1841 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1842 && hdr2->sh_link == shindex)
1846 for (i = 1; i < shindex; i++)
1848 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1849 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1850 && hdr2->sh_link == shindex)
1854 return bfd_section_from_shdr (abfd, i);
1858 case SHT_DYNSYM: /* A dynamic symbol table */
1859 if (elf_dynsymtab (abfd) == shindex)
1862 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1863 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1864 elf_dynsymtab (abfd) = shindex;
1865 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1866 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1867 abfd->flags |= HAS_SYMS;
1869 /* Besides being a symbol table, we also treat this as a regular
1870 section, so that objcopy can handle it. */
1871 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1873 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1874 if (elf_symtab_shndx (abfd) == shindex)
1877 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1878 elf_symtab_shndx (abfd) = shindex;
1879 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1880 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1883 case SHT_STRTAB: /* A string table */
1884 if (hdr->bfd_section != NULL)
1886 if (ehdr->e_shstrndx == shindex)
1888 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1889 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1892 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1895 elf_tdata (abfd)->strtab_hdr = *hdr;
1896 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1899 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1902 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1903 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1904 elf_elfsections (abfd)[shindex] = hdr;
1905 /* We also treat this as a regular section, so that objcopy
1907 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1911 /* If the string table isn't one of the above, then treat it as a
1912 regular section. We need to scan all the headers to be sure,
1913 just in case this strtab section appeared before the above. */
1914 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1916 unsigned int i, num_sec;
1918 num_sec = elf_numsections (abfd);
1919 for (i = 1; i < num_sec; i++)
1921 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1922 if (hdr2->sh_link == shindex)
1924 if (! bfd_section_from_shdr (abfd, i))
1926 if (elf_onesymtab (abfd) == i)
1928 if (elf_dynsymtab (abfd) == i)
1929 goto dynsymtab_strtab;
1933 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1937 /* *These* do a lot of work -- but build no sections! */
1939 asection *target_sect;
1940 Elf_Internal_Shdr *hdr2;
1941 unsigned int num_sec = elf_numsections (abfd);
1943 /* Check for a bogus link to avoid crashing. */
1944 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1945 || hdr->sh_link >= num_sec)
1947 ((*_bfd_error_handler)
1948 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1949 abfd, hdr->sh_link, name, shindex));
1950 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1954 /* For some incomprehensible reason Oracle distributes
1955 libraries for Solaris in which some of the objects have
1956 bogus sh_link fields. It would be nice if we could just
1957 reject them, but, unfortunately, some people need to use
1958 them. We scan through the section headers; if we find only
1959 one suitable symbol table, we clobber the sh_link to point
1960 to it. I hope this doesn't break anything. */
1961 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1962 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1968 for (scan = 1; scan < num_sec; scan++)
1970 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1971 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1982 hdr->sh_link = found;
1985 /* Get the symbol table. */
1986 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1987 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
1988 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1991 /* If this reloc section does not use the main symbol table we
1992 don't treat it as a reloc section. BFD can't adequately
1993 represent such a section, so at least for now, we don't
1994 try. We just present it as a normal section. We also
1995 can't use it as a reloc section if it points to the null
1997 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF)
1998 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2001 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
2003 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
2004 if (target_sect == NULL)
2007 if ((target_sect->flags & SEC_RELOC) == 0
2008 || target_sect->reloc_count == 0)
2009 hdr2 = &elf_section_data (target_sect)->rel_hdr;
2013 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
2014 amt = sizeof (*hdr2);
2015 hdr2 = bfd_alloc (abfd, amt);
2016 elf_section_data (target_sect)->rel_hdr2 = hdr2;
2019 elf_elfsections (abfd)[shindex] = hdr2;
2020 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
2021 target_sect->flags |= SEC_RELOC;
2022 target_sect->relocation = NULL;
2023 target_sect->rel_filepos = hdr->sh_offset;
2024 /* In the section to which the relocations apply, mark whether
2025 its relocations are of the REL or RELA variety. */
2026 if (hdr->sh_size != 0)
2027 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
2028 abfd->flags |= HAS_RELOC;
2033 case SHT_GNU_verdef:
2034 elf_dynverdef (abfd) = shindex;
2035 elf_tdata (abfd)->dynverdef_hdr = *hdr;
2036 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2039 case SHT_GNU_versym:
2040 elf_dynversym (abfd) = shindex;
2041 elf_tdata (abfd)->dynversym_hdr = *hdr;
2042 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2045 case SHT_GNU_verneed:
2046 elf_dynverref (abfd) = shindex;
2047 elf_tdata (abfd)->dynverref_hdr = *hdr;
2048 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2055 /* We need a BFD section for objcopy and relocatable linking,
2056 and it's handy to have the signature available as the section
2058 name = group_signature (abfd, hdr);
2061 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2063 if (hdr->contents != NULL)
2065 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
2066 unsigned int n_elt = hdr->sh_size / 4;
2069 if (idx->flags & GRP_COMDAT)
2070 hdr->bfd_section->flags
2071 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
2073 /* We try to keep the same section order as it comes in. */
2075 while (--n_elt != 0)
2076 if ((s = (--idx)->shdr->bfd_section) != NULL
2077 && elf_next_in_group (s) != NULL)
2079 elf_next_in_group (hdr->bfd_section) = s;
2086 /* Check for any processor-specific section types. */
2087 return bed->elf_backend_section_from_shdr (abfd, hdr, name,
2094 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2095 Return SEC for sections that have no elf section, and NULL on error. */
2098 bfd_section_from_r_symndx (bfd *abfd,
2099 struct sym_sec_cache *cache,
2101 unsigned long r_symndx)
2103 Elf_Internal_Shdr *symtab_hdr;
2104 unsigned char esym[sizeof (Elf64_External_Sym)];
2105 Elf_External_Sym_Shndx eshndx;
2106 Elf_Internal_Sym isym;
2107 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2109 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
2110 return cache->sec[ent];
2112 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2113 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2114 &isym, esym, &eshndx) == NULL)
2117 if (cache->abfd != abfd)
2119 memset (cache->indx, -1, sizeof (cache->indx));
2122 cache->indx[ent] = r_symndx;
2123 cache->sec[ent] = sec;
2124 if ((isym.st_shndx != SHN_UNDEF && isym.st_shndx < SHN_LORESERVE)
2125 || isym.st_shndx > SHN_HIRESERVE)
2128 s = bfd_section_from_elf_index (abfd, isym.st_shndx);
2130 cache->sec[ent] = s;
2132 return cache->sec[ent];
2135 /* Given an ELF section number, retrieve the corresponding BFD
2139 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
2141 if (index >= elf_numsections (abfd))
2143 return elf_elfsections (abfd)[index]->bfd_section;
2146 static struct bfd_elf_special_section const special_sections_b[] =
2148 { ".bss", 4, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2149 { NULL, 0, 0, 0, 0 }
2152 static struct bfd_elf_special_section const special_sections_c[] =
2154 { ".comment", 8, 0, SHT_PROGBITS, 0 },
2155 { NULL, 0, 0, 0, 0 }
2158 static struct bfd_elf_special_section const special_sections_d[] =
2160 { ".data", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2161 { ".data1", 6, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2162 { ".debug", 6, 0, SHT_PROGBITS, 0 },
2163 { ".debug_line", 11, 0, SHT_PROGBITS, 0 },
2164 { ".debug_info", 11, 0, SHT_PROGBITS, 0 },
2165 { ".debug_abbrev", 13, 0, SHT_PROGBITS, 0 },
2166 { ".debug_aranges", 14, 0, SHT_PROGBITS, 0 },
2167 { ".dynamic", 8, 0, SHT_DYNAMIC, SHF_ALLOC },
2168 { ".dynstr", 7, 0, SHT_STRTAB, SHF_ALLOC },
2169 { ".dynsym", 7, 0, SHT_DYNSYM, SHF_ALLOC },
2170 { NULL, 0, 0, 0, 0 }
2173 static struct bfd_elf_special_section const special_sections_f[] =
2175 { ".fini", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2176 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2177 { NULL, 0, 0, 0, 0 }
2180 static struct bfd_elf_special_section const special_sections_g[] =
2182 { ".gnu.linkonce.b",15, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2183 { ".got", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2184 { ".gnu.version", 12, 0, SHT_GNU_versym, 0 },
2185 { ".gnu.version_d", 14, 0, SHT_GNU_verdef, 0 },
2186 { ".gnu.version_r", 14, 0, SHT_GNU_verneed, 0 },
2187 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2188 { ".gnu.conflict", 13, 0, SHT_RELA, SHF_ALLOC },
2189 { NULL, 0, 0, 0, 0 }
2192 static struct bfd_elf_special_section const special_sections_h[] =
2194 { ".hash", 5, 0, SHT_HASH, SHF_ALLOC },
2195 { NULL, 0, 0, 0, 0 }
2198 static struct bfd_elf_special_section const special_sections_i[] =
2200 { ".init", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2201 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2202 { ".interp", 7, 0, SHT_PROGBITS, 0 },
2203 { NULL, 0, 0, 0, 0 }
2206 static struct bfd_elf_special_section const special_sections_l[] =
2208 { ".line", 5, 0, SHT_PROGBITS, 0 },
2209 { NULL, 0, 0, 0, 0 }
2212 static struct bfd_elf_special_section const special_sections_n[] =
2214 { ".note.GNU-stack",15, 0, SHT_PROGBITS, 0 },
2215 { ".note", 5, -1, SHT_NOTE, 0 },
2216 { NULL, 0, 0, 0, 0 }
2219 static struct bfd_elf_special_section const special_sections_p[] =
2221 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2222 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2223 { NULL, 0, 0, 0, 0 }
2226 static struct bfd_elf_special_section const special_sections_r[] =
2228 { ".rodata", 7, -2, SHT_PROGBITS, SHF_ALLOC },
2229 { ".rodata1", 8, 0, SHT_PROGBITS, SHF_ALLOC },
2230 { ".rela", 5, -1, SHT_RELA, 0 },
2231 { ".rel", 4, -1, SHT_REL, 0 },
2232 { NULL, 0, 0, 0, 0 }
2235 static struct bfd_elf_special_section const special_sections_s[] =
2237 { ".shstrtab", 9, 0, SHT_STRTAB, 0 },
2238 { ".strtab", 7, 0, SHT_STRTAB, 0 },
2239 { ".symtab", 7, 0, SHT_SYMTAB, 0 },
2240 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2241 { NULL, 0, 0, 0, 0 }
2244 static struct bfd_elf_special_section const special_sections_t[] =
2246 { ".text", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2247 { ".tbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2248 { ".tdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2249 { NULL, 0, 0, 0, 0 }
2252 static struct bfd_elf_special_section const *special_sections [27] =
2255 special_sections_b, /* 'b' */
2256 special_sections_c, /* 'b' */
2257 special_sections_d, /* 'd' */
2259 special_sections_f, /* 'f' */
2260 special_sections_g, /* 'g' */
2261 special_sections_h, /* 'h' */
2262 special_sections_i, /* 'i' */
2265 special_sections_l, /* 'l' */
2267 special_sections_n, /* 'n' */
2269 special_sections_p, /* 'p' */
2271 special_sections_r, /* 'r' */
2272 special_sections_s, /* 's' */
2273 special_sections_t, /* 't' */
2283 static const struct bfd_elf_special_section *
2284 get_special_section (const char *name,
2285 const struct bfd_elf_special_section **special_sections_p,
2290 const struct bfd_elf_special_section *special_sections;
2292 if (name [0] == '.')
2295 if (i < 0 || i > 25)
2301 special_sections = special_sections_p [i];
2303 if (!special_sections)
2304 return special_sections;
2308 for (i = 0; special_sections[i].prefix != NULL; i++)
2311 int prefix_len = special_sections[i].prefix_length;
2313 if (len < prefix_len)
2315 if (memcmp (name, special_sections[i].prefix, prefix_len) != 0)
2318 suffix_len = special_sections[i].suffix_length;
2319 if (suffix_len <= 0)
2321 if (name[prefix_len] != 0)
2323 if (suffix_len == 0)
2325 if (name[prefix_len] != '.'
2326 && (suffix_len == -2
2327 || (rela && special_sections[i].type == SHT_REL)))
2333 if (len < prefix_len + suffix_len)
2335 if (memcmp (name + len - suffix_len,
2336 special_sections[i].prefix + prefix_len,
2340 return &special_sections[i];
2346 const struct bfd_elf_special_section *
2347 _bfd_elf_get_sec_type_attr (bfd *abfd, const char *name)
2349 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2350 const struct bfd_elf_special_section *ssect = NULL;
2352 /* See if this is one of the special sections. */
2355 unsigned int rela = bed->default_use_rela_p;
2357 if (bed->special_sections)
2358 ssect = get_special_section (name, bed->special_sections, rela);
2361 ssect = get_special_section (name, special_sections, rela);
2368 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2370 struct bfd_elf_section_data *sdata;
2371 const struct bfd_elf_special_section *ssect;
2373 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2376 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2379 sec->used_by_bfd = sdata;
2382 /* When we read a file, we don't need section type and flags unless
2383 it is a linker created section. They will be overridden in
2384 _bfd_elf_make_section_from_shdr anyway. */
2385 if (abfd->direction != read_direction
2386 || (sec->flags & SEC_LINKER_CREATED) != 0)
2388 ssect = _bfd_elf_get_sec_type_attr (abfd, sec->name);
2391 elf_section_type (sec) = ssect->type;
2392 elf_section_flags (sec) = ssect->attr;
2396 /* Indicate whether or not this section should use RELA relocations. */
2397 sec->use_rela_p = get_elf_backend_data (abfd)->default_use_rela_p;
2402 /* Create a new bfd section from an ELF program header.
2404 Since program segments have no names, we generate a synthetic name
2405 of the form segment<NUM>, where NUM is generally the index in the
2406 program header table. For segments that are split (see below) we
2407 generate the names segment<NUM>a and segment<NUM>b.
2409 Note that some program segments may have a file size that is different than
2410 (less than) the memory size. All this means is that at execution the
2411 system must allocate the amount of memory specified by the memory size,
2412 but only initialize it with the first "file size" bytes read from the
2413 file. This would occur for example, with program segments consisting
2414 of combined data+bss.
2416 To handle the above situation, this routine generates TWO bfd sections
2417 for the single program segment. The first has the length specified by
2418 the file size of the segment, and the second has the length specified
2419 by the difference between the two sizes. In effect, the segment is split
2420 into it's initialized and uninitialized parts.
2425 _bfd_elf_make_section_from_phdr (bfd *abfd,
2426 Elf_Internal_Phdr *hdr,
2428 const char *typename)
2436 split = ((hdr->p_memsz > 0)
2437 && (hdr->p_filesz > 0)
2438 && (hdr->p_memsz > hdr->p_filesz));
2439 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2440 len = strlen (namebuf) + 1;
2441 name = bfd_alloc (abfd, len);
2444 memcpy (name, namebuf, len);
2445 newsect = bfd_make_section (abfd, name);
2446 if (newsect == NULL)
2448 newsect->vma = hdr->p_vaddr;
2449 newsect->lma = hdr->p_paddr;
2450 newsect->size = hdr->p_filesz;
2451 newsect->filepos = hdr->p_offset;
2452 newsect->flags |= SEC_HAS_CONTENTS;
2453 newsect->alignment_power = bfd_log2 (hdr->p_align);
2454 if (hdr->p_type == PT_LOAD)
2456 newsect->flags |= SEC_ALLOC;
2457 newsect->flags |= SEC_LOAD;
2458 if (hdr->p_flags & PF_X)
2460 /* FIXME: all we known is that it has execute PERMISSION,
2462 newsect->flags |= SEC_CODE;
2465 if (!(hdr->p_flags & PF_W))
2467 newsect->flags |= SEC_READONLY;
2472 sprintf (namebuf, "%s%db", typename, index);
2473 len = strlen (namebuf) + 1;
2474 name = bfd_alloc (abfd, len);
2477 memcpy (name, namebuf, len);
2478 newsect = bfd_make_section (abfd, name);
2479 if (newsect == NULL)
2481 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2482 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2483 newsect->size = hdr->p_memsz - hdr->p_filesz;
2484 if (hdr->p_type == PT_LOAD)
2486 newsect->flags |= SEC_ALLOC;
2487 if (hdr->p_flags & PF_X)
2488 newsect->flags |= SEC_CODE;
2490 if (!(hdr->p_flags & PF_W))
2491 newsect->flags |= SEC_READONLY;
2498 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2500 const struct elf_backend_data *bed;
2502 switch (hdr->p_type)
2505 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2508 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2511 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2514 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2517 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2519 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2524 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2527 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2529 case PT_GNU_EH_FRAME:
2530 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2534 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2537 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
2540 /* Check for any processor-specific program segment types. */
2541 bed = get_elf_backend_data (abfd);
2542 return bed->elf_backend_section_from_phdr (abfd, hdr, index, "proc");
2546 /* Initialize REL_HDR, the section-header for new section, containing
2547 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2548 relocations; otherwise, we use REL relocations. */
2551 _bfd_elf_init_reloc_shdr (bfd *abfd,
2552 Elf_Internal_Shdr *rel_hdr,
2554 bfd_boolean use_rela_p)
2557 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2558 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2560 name = bfd_alloc (abfd, amt);
2563 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2565 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2567 if (rel_hdr->sh_name == (unsigned int) -1)
2569 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2570 rel_hdr->sh_entsize = (use_rela_p
2571 ? bed->s->sizeof_rela
2572 : bed->s->sizeof_rel);
2573 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2574 rel_hdr->sh_flags = 0;
2575 rel_hdr->sh_addr = 0;
2576 rel_hdr->sh_size = 0;
2577 rel_hdr->sh_offset = 0;
2582 /* Set up an ELF internal section header for a section. */
2585 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2587 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2588 bfd_boolean *failedptr = failedptrarg;
2589 Elf_Internal_Shdr *this_hdr;
2593 /* We already failed; just get out of the bfd_map_over_sections
2598 this_hdr = &elf_section_data (asect)->this_hdr;
2600 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2601 asect->name, FALSE);
2602 if (this_hdr->sh_name == (unsigned int) -1)
2608 this_hdr->sh_flags = 0;
2610 if ((asect->flags & SEC_ALLOC) != 0
2611 || asect->user_set_vma)
2612 this_hdr->sh_addr = asect->vma;
2614 this_hdr->sh_addr = 0;
2616 this_hdr->sh_offset = 0;
2617 this_hdr->sh_size = asect->size;
2618 this_hdr->sh_link = 0;
2619 this_hdr->sh_addralign = 1 << asect->alignment_power;
2620 /* The sh_entsize and sh_info fields may have been set already by
2621 copy_private_section_data. */
2623 this_hdr->bfd_section = asect;
2624 this_hdr->contents = NULL;
2626 /* If the section type is unspecified, we set it based on
2628 if (this_hdr->sh_type == SHT_NULL)
2630 if ((asect->flags & SEC_GROUP) != 0)
2632 /* We also need to mark SHF_GROUP here for relocatable
2634 struct bfd_link_order *l;
2637 for (l = asect->map_head.link_order; l != NULL; l = l->next)
2638 if (l->type == bfd_indirect_link_order
2639 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2642 /* The name is not important. Anything will do. */
2643 elf_group_name (elt->output_section) = "G";
2644 elf_section_flags (elt->output_section) |= SHF_GROUP;
2646 elt = elf_next_in_group (elt);
2647 /* During a relocatable link, the lists are
2650 while (elt != elf_next_in_group (l->u.indirect.section));
2652 this_hdr->sh_type = SHT_GROUP;
2654 else if ((asect->flags & SEC_ALLOC) != 0
2655 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2656 || (asect->flags & SEC_NEVER_LOAD) != 0))
2657 this_hdr->sh_type = SHT_NOBITS;
2659 this_hdr->sh_type = SHT_PROGBITS;
2662 switch (this_hdr->sh_type)
2668 case SHT_INIT_ARRAY:
2669 case SHT_FINI_ARRAY:
2670 case SHT_PREINIT_ARRAY:
2677 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2681 this_hdr->sh_entsize = bed->s->sizeof_sym;
2685 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2689 if (get_elf_backend_data (abfd)->may_use_rela_p)
2690 this_hdr->sh_entsize = bed->s->sizeof_rela;
2694 if (get_elf_backend_data (abfd)->may_use_rel_p)
2695 this_hdr->sh_entsize = bed->s->sizeof_rel;
2698 case SHT_GNU_versym:
2699 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2702 case SHT_GNU_verdef:
2703 this_hdr->sh_entsize = 0;
2704 /* objcopy or strip will copy over sh_info, but may not set
2705 cverdefs. The linker will set cverdefs, but sh_info will be
2707 if (this_hdr->sh_info == 0)
2708 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2710 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2711 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2714 case SHT_GNU_verneed:
2715 this_hdr->sh_entsize = 0;
2716 /* objcopy or strip will copy over sh_info, but may not set
2717 cverrefs. The linker will set cverrefs, but sh_info will be
2719 if (this_hdr->sh_info == 0)
2720 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2722 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2723 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2727 this_hdr->sh_entsize = 4;
2731 if ((asect->flags & SEC_ALLOC) != 0)
2732 this_hdr->sh_flags |= SHF_ALLOC;
2733 if ((asect->flags & SEC_READONLY) == 0)
2734 this_hdr->sh_flags |= SHF_WRITE;
2735 if ((asect->flags & SEC_CODE) != 0)
2736 this_hdr->sh_flags |= SHF_EXECINSTR;
2737 if ((asect->flags & SEC_MERGE) != 0)
2739 this_hdr->sh_flags |= SHF_MERGE;
2740 this_hdr->sh_entsize = asect->entsize;
2741 if ((asect->flags & SEC_STRINGS) != 0)
2742 this_hdr->sh_flags |= SHF_STRINGS;
2744 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2745 this_hdr->sh_flags |= SHF_GROUP;
2746 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2748 this_hdr->sh_flags |= SHF_TLS;
2749 if (asect->size == 0 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2751 struct bfd_link_order *o;
2753 this_hdr->sh_size = 0;
2754 for (o = asect->map_head.link_order; o != NULL; o = o->next)
2755 if (this_hdr->sh_size < o->offset + o->size)
2756 this_hdr->sh_size = o->offset + o->size;
2757 if (this_hdr->sh_size)
2758 this_hdr->sh_type = SHT_NOBITS;
2762 /* Check for processor-specific section types. */
2763 if (bed->elf_backend_fake_sections
2764 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2767 /* If the section has relocs, set up a section header for the
2768 SHT_REL[A] section. If two relocation sections are required for
2769 this section, it is up to the processor-specific back-end to
2770 create the other. */
2771 if ((asect->flags & SEC_RELOC) != 0
2772 && !_bfd_elf_init_reloc_shdr (abfd,
2773 &elf_section_data (asect)->rel_hdr,
2779 /* Fill in the contents of a SHT_GROUP section. */
2782 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2784 bfd_boolean *failedptr = failedptrarg;
2785 unsigned long symindx;
2786 asection *elt, *first;
2788 struct bfd_link_order *l;
2791 /* Ignore linker created group section. See elfNN_ia64_object_p in
2793 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2798 if (elf_group_id (sec) != NULL)
2799 symindx = elf_group_id (sec)->udata.i;
2803 /* If called from the assembler, swap_out_syms will have set up
2804 elf_section_syms; If called for "ld -r", use target_index. */
2805 if (elf_section_syms (abfd) != NULL)
2806 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2808 symindx = sec->target_index;
2810 elf_section_data (sec)->this_hdr.sh_info = symindx;
2812 /* The contents won't be allocated for "ld -r" or objcopy. */
2814 if (sec->contents == NULL)
2817 sec->contents = bfd_alloc (abfd, sec->size);
2819 /* Arrange for the section to be written out. */
2820 elf_section_data (sec)->this_hdr.contents = sec->contents;
2821 if (sec->contents == NULL)
2828 loc = sec->contents + sec->size;
2830 /* Get the pointer to the first section in the group that gas
2831 squirreled away here. objcopy arranges for this to be set to the
2832 start of the input section group. */
2833 first = elt = elf_next_in_group (sec);
2835 /* First element is a flag word. Rest of section is elf section
2836 indices for all the sections of the group. Write them backwards
2837 just to keep the group in the same order as given in .section
2838 directives, not that it matters. */
2847 s = s->output_section;
2850 idx = elf_section_data (s)->this_idx;
2851 H_PUT_32 (abfd, idx, loc);
2852 elt = elf_next_in_group (elt);
2857 /* If this is a relocatable link, then the above did nothing because
2858 SEC is the output section. Look through the input sections
2860 for (l = sec->map_head.link_order; l != NULL; l = l->next)
2861 if (l->type == bfd_indirect_link_order
2862 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2867 elf_section_data (elt->output_section)->this_idx, loc);
2868 elt = elf_next_in_group (elt);
2869 /* During a relocatable link, the lists are circular. */
2871 while (elt != elf_next_in_group (l->u.indirect.section));
2873 if ((loc -= 4) != sec->contents)
2876 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2879 /* Assign all ELF section numbers. The dummy first section is handled here
2880 too. The link/info pointers for the standard section types are filled
2881 in here too, while we're at it. */
2884 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2886 struct elf_obj_tdata *t = elf_tdata (abfd);
2888 unsigned int section_number, secn;
2889 Elf_Internal_Shdr **i_shdrp;
2891 struct bfd_elf_section_data *d;
2895 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2897 /* SHT_GROUP sections are in relocatable files only. */
2898 if (link_info == NULL || link_info->relocatable)
2900 /* Put SHT_GROUP sections first. */
2901 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2903 d = elf_section_data (sec);
2905 if (d->this_hdr.sh_type == SHT_GROUP)
2907 if (sec->flags & SEC_LINKER_CREATED)
2909 /* Remove the linker created SHT_GROUP sections. */
2910 bfd_section_list_remove (abfd, sec);
2911 abfd->section_count--;
2915 if (section_number == SHN_LORESERVE)
2916 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2917 d->this_idx = section_number++;
2923 for (sec = abfd->sections; sec; sec = sec->next)
2925 d = elf_section_data (sec);
2927 if (d->this_hdr.sh_type != SHT_GROUP)
2929 if (section_number == SHN_LORESERVE)
2930 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2931 d->this_idx = section_number++;
2933 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2934 if ((sec->flags & SEC_RELOC) == 0)
2938 if (section_number == SHN_LORESERVE)
2939 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2940 d->rel_idx = section_number++;
2941 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2946 if (section_number == SHN_LORESERVE)
2947 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2948 d->rel_idx2 = section_number++;
2949 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2955 if (section_number == SHN_LORESERVE)
2956 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2957 t->shstrtab_section = section_number++;
2958 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2959 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2961 if (bfd_get_symcount (abfd) > 0)
2963 if (section_number == SHN_LORESERVE)
2964 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2965 t->symtab_section = section_number++;
2966 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2967 if (section_number > SHN_LORESERVE - 2)
2969 if (section_number == SHN_LORESERVE)
2970 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2971 t->symtab_shndx_section = section_number++;
2972 t->symtab_shndx_hdr.sh_name
2973 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2974 ".symtab_shndx", FALSE);
2975 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2978 if (section_number == SHN_LORESERVE)
2979 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2980 t->strtab_section = section_number++;
2981 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2984 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2985 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2987 elf_numsections (abfd) = section_number;
2988 elf_elfheader (abfd)->e_shnum = section_number;
2989 if (section_number > SHN_LORESERVE)
2990 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2992 /* Set up the list of section header pointers, in agreement with the
2994 amt = section_number * sizeof (Elf_Internal_Shdr *);
2995 i_shdrp = bfd_zalloc (abfd, amt);
2996 if (i_shdrp == NULL)
2999 amt = sizeof (Elf_Internal_Shdr);
3000 i_shdrp[0] = bfd_zalloc (abfd, amt);
3001 if (i_shdrp[0] == NULL)
3003 bfd_release (abfd, i_shdrp);
3007 elf_elfsections (abfd) = i_shdrp;
3009 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
3010 if (bfd_get_symcount (abfd) > 0)
3012 i_shdrp[t->symtab_section] = &t->symtab_hdr;
3013 if (elf_numsections (abfd) > SHN_LORESERVE)
3015 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
3016 t->symtab_shndx_hdr.sh_link = t->symtab_section;
3018 i_shdrp[t->strtab_section] = &t->strtab_hdr;
3019 t->symtab_hdr.sh_link = t->strtab_section;
3022 for (sec = abfd->sections; sec; sec = sec->next)
3024 struct bfd_elf_section_data *d = elf_section_data (sec);
3028 i_shdrp[d->this_idx] = &d->this_hdr;
3029 if (d->rel_idx != 0)
3030 i_shdrp[d->rel_idx] = &d->rel_hdr;
3031 if (d->rel_idx2 != 0)
3032 i_shdrp[d->rel_idx2] = d->rel_hdr2;
3034 /* Fill in the sh_link and sh_info fields while we're at it. */
3036 /* sh_link of a reloc section is the section index of the symbol
3037 table. sh_info is the section index of the section to which
3038 the relocation entries apply. */
3039 if (d->rel_idx != 0)
3041 d->rel_hdr.sh_link = t->symtab_section;
3042 d->rel_hdr.sh_info = d->this_idx;
3044 if (d->rel_idx2 != 0)
3046 d->rel_hdr2->sh_link = t->symtab_section;
3047 d->rel_hdr2->sh_info = d->this_idx;
3050 /* We need to set up sh_link for SHF_LINK_ORDER. */
3051 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3053 s = elf_linked_to_section (sec);
3055 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3058 struct bfd_link_order *p;
3060 /* Find out what the corresponding section in output
3062 for (p = sec->map_head.link_order; p != NULL; p = p->next)
3064 s = p->u.indirect.section;
3065 if (p->type == bfd_indirect_link_order
3066 && (bfd_get_flavour (s->owner)
3067 == bfd_target_elf_flavour))
3069 Elf_Internal_Shdr ** const elf_shdrp
3070 = elf_elfsections (s->owner);
3072 = _bfd_elf_section_from_bfd_section (s->owner, s);
3073 elfsec = elf_shdrp[elfsec]->sh_link;
3075 The Intel C compiler generates SHT_IA_64_UNWIND with
3076 SHF_LINK_ORDER. But it doesn't set the sh_link or
3077 sh_info fields. Hence we could get the situation
3078 where elfsec is 0. */
3081 const struct elf_backend_data *bed
3082 = get_elf_backend_data (abfd);
3083 if (bed->link_order_error_handler)
3084 bed->link_order_error_handler
3085 (_("%B: warning: sh_link not set for section `%A'"),
3090 s = elf_shdrp[elfsec]->bfd_section;
3091 if (elf_discarded_section (s))
3094 (*_bfd_error_handler)
3095 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3096 abfd, d->this_hdr.bfd_section,
3098 /* Point to the kept section if it has
3099 the same size as the discarded
3101 kept = _bfd_elf_check_kept_section (s);
3104 bfd_set_error (bfd_error_bad_value);
3109 s = s->output_section;
3110 BFD_ASSERT (s != NULL);
3111 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3119 switch (d->this_hdr.sh_type)
3123 /* A reloc section which we are treating as a normal BFD
3124 section. sh_link is the section index of the symbol
3125 table. sh_info is the section index of the section to
3126 which the relocation entries apply. We assume that an
3127 allocated reloc section uses the dynamic symbol table.
3128 FIXME: How can we be sure? */
3129 s = bfd_get_section_by_name (abfd, ".dynsym");
3131 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3133 /* We look up the section the relocs apply to by name. */
3135 if (d->this_hdr.sh_type == SHT_REL)
3139 s = bfd_get_section_by_name (abfd, name);
3141 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3145 /* We assume that a section named .stab*str is a stabs
3146 string section. We look for a section with the same name
3147 but without the trailing ``str'', and set its sh_link
3148 field to point to this section. */
3149 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
3150 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3155 len = strlen (sec->name);
3156 alc = bfd_malloc (len - 2);
3159 memcpy (alc, sec->name, len - 3);
3160 alc[len - 3] = '\0';
3161 s = bfd_get_section_by_name (abfd, alc);
3165 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3167 /* This is a .stab section. */
3168 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3169 elf_section_data (s)->this_hdr.sh_entsize
3170 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3177 case SHT_GNU_verneed:
3178 case SHT_GNU_verdef:
3179 /* sh_link is the section header index of the string table
3180 used for the dynamic entries, or the symbol table, or the
3182 s = bfd_get_section_by_name (abfd, ".dynstr");
3184 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3187 case SHT_GNU_LIBLIST:
3188 /* sh_link is the section header index of the prelink library
3190 used for the dynamic entries, or the symbol table, or the
3192 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3193 ? ".dynstr" : ".gnu.libstr");
3195 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3199 case SHT_GNU_versym:
3200 /* sh_link is the section header index of the symbol table
3201 this hash table or version table is for. */
3202 s = bfd_get_section_by_name (abfd, ".dynsym");
3204 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3208 d->this_hdr.sh_link = t->symtab_section;
3212 for (secn = 1; secn < section_number; ++secn)
3213 if (i_shdrp[secn] == NULL)
3214 i_shdrp[secn] = i_shdrp[0];
3216 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3217 i_shdrp[secn]->sh_name);
3221 /* Map symbol from it's internal number to the external number, moving
3222 all local symbols to be at the head of the list. */
3225 sym_is_global (bfd *abfd, asymbol *sym)
3227 /* If the backend has a special mapping, use it. */
3228 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3229 if (bed->elf_backend_sym_is_global)
3230 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3232 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3233 || bfd_is_und_section (bfd_get_section (sym))
3234 || bfd_is_com_section (bfd_get_section (sym)));
3238 elf_map_symbols (bfd *abfd)
3240 unsigned int symcount = bfd_get_symcount (abfd);
3241 asymbol **syms = bfd_get_outsymbols (abfd);
3242 asymbol **sect_syms;
3243 unsigned int num_locals = 0;
3244 unsigned int num_globals = 0;
3245 unsigned int num_locals2 = 0;
3246 unsigned int num_globals2 = 0;
3254 fprintf (stderr, "elf_map_symbols\n");
3258 for (asect = abfd->sections; asect; asect = asect->next)
3260 if (max_index < asect->index)
3261 max_index = asect->index;
3265 amt = max_index * sizeof (asymbol *);
3266 sect_syms = bfd_zalloc (abfd, amt);
3267 if (sect_syms == NULL)
3269 elf_section_syms (abfd) = sect_syms;
3270 elf_num_section_syms (abfd) = max_index;
3272 /* Init sect_syms entries for any section symbols we have already
3273 decided to output. */
3274 for (idx = 0; idx < symcount; idx++)
3276 asymbol *sym = syms[idx];
3278 if ((sym->flags & BSF_SECTION_SYM) != 0
3285 if (sec->owner != NULL)
3287 if (sec->owner != abfd)
3289 if (sec->output_offset != 0)
3292 sec = sec->output_section;
3294 /* Empty sections in the input files may have had a
3295 section symbol created for them. (See the comment
3296 near the end of _bfd_generic_link_output_symbols in
3297 linker.c). If the linker script discards such
3298 sections then we will reach this point. Since we know
3299 that we cannot avoid this case, we detect it and skip
3300 the abort and the assignment to the sect_syms array.
3301 To reproduce this particular case try running the
3302 linker testsuite test ld-scripts/weak.exp for an ELF
3303 port that uses the generic linker. */
3304 if (sec->owner == NULL)
3307 BFD_ASSERT (sec->owner == abfd);
3309 sect_syms[sec->index] = syms[idx];
3314 /* Classify all of the symbols. */
3315 for (idx = 0; idx < symcount; idx++)
3317 if (!sym_is_global (abfd, syms[idx]))
3323 /* We will be adding a section symbol for each BFD section. Most normal
3324 sections will already have a section symbol in outsymbols, but
3325 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3326 at least in that case. */
3327 for (asect = abfd->sections; asect; asect = asect->next)
3329 if (sect_syms[asect->index] == NULL)
3331 if (!sym_is_global (abfd, asect->symbol))
3338 /* Now sort the symbols so the local symbols are first. */
3339 amt = (num_locals + num_globals) * sizeof (asymbol *);
3340 new_syms = bfd_alloc (abfd, amt);
3342 if (new_syms == NULL)
3345 for (idx = 0; idx < symcount; idx++)
3347 asymbol *sym = syms[idx];
3350 if (!sym_is_global (abfd, sym))
3353 i = num_locals + num_globals2++;
3355 sym->udata.i = i + 1;
3357 for (asect = abfd->sections; asect; asect = asect->next)
3359 if (sect_syms[asect->index] == NULL)
3361 asymbol *sym = asect->symbol;
3364 sect_syms[asect->index] = sym;
3365 if (!sym_is_global (abfd, sym))
3368 i = num_locals + num_globals2++;
3370 sym->udata.i = i + 1;
3374 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3376 elf_num_locals (abfd) = num_locals;
3377 elf_num_globals (abfd) = num_globals;
3381 /* Align to the maximum file alignment that could be required for any
3382 ELF data structure. */
3384 static inline file_ptr
3385 align_file_position (file_ptr off, int align)
3387 return (off + align - 1) & ~(align - 1);
3390 /* Assign a file position to a section, optionally aligning to the
3391 required section alignment. */
3394 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3402 al = i_shdrp->sh_addralign;
3404 offset = BFD_ALIGN (offset, al);
3406 i_shdrp->sh_offset = offset;
3407 if (i_shdrp->bfd_section != NULL)
3408 i_shdrp->bfd_section->filepos = offset;
3409 if (i_shdrp->sh_type != SHT_NOBITS)
3410 offset += i_shdrp->sh_size;
3414 /* Compute the file positions we are going to put the sections at, and
3415 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3416 is not NULL, this is being called by the ELF backend linker. */
3419 _bfd_elf_compute_section_file_positions (bfd *abfd,
3420 struct bfd_link_info *link_info)
3422 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3424 struct bfd_strtab_hash *strtab = NULL;
3425 Elf_Internal_Shdr *shstrtab_hdr;
3427 if (abfd->output_has_begun)
3430 /* Do any elf backend specific processing first. */
3431 if (bed->elf_backend_begin_write_processing)
3432 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3434 if (! prep_headers (abfd))
3437 /* Post process the headers if necessary. */
3438 if (bed->elf_backend_post_process_headers)
3439 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3442 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3446 if (!assign_section_numbers (abfd, link_info))
3449 /* The backend linker builds symbol table information itself. */
3450 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3452 /* Non-zero if doing a relocatable link. */
3453 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3455 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3459 if (link_info == NULL)
3461 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3466 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3467 /* sh_name was set in prep_headers. */
3468 shstrtab_hdr->sh_type = SHT_STRTAB;
3469 shstrtab_hdr->sh_flags = 0;
3470 shstrtab_hdr->sh_addr = 0;
3471 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3472 shstrtab_hdr->sh_entsize = 0;
3473 shstrtab_hdr->sh_link = 0;
3474 shstrtab_hdr->sh_info = 0;
3475 /* sh_offset is set in assign_file_positions_except_relocs. */
3476 shstrtab_hdr->sh_addralign = 1;
3478 if (!assign_file_positions_except_relocs (abfd, link_info))
3481 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3484 Elf_Internal_Shdr *hdr;
3486 off = elf_tdata (abfd)->next_file_pos;
3488 hdr = &elf_tdata (abfd)->symtab_hdr;
3489 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3491 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3492 if (hdr->sh_size != 0)
3493 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3495 hdr = &elf_tdata (abfd)->strtab_hdr;
3496 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3498 elf_tdata (abfd)->next_file_pos = off;
3500 /* Now that we know where the .strtab section goes, write it
3502 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3503 || ! _bfd_stringtab_emit (abfd, strtab))
3505 _bfd_stringtab_free (strtab);
3508 abfd->output_has_begun = TRUE;
3513 /* Create a mapping from a set of sections to a program segment. */
3515 static struct elf_segment_map *
3516 make_mapping (bfd *abfd,
3517 asection **sections,
3522 struct elf_segment_map *m;
3527 amt = sizeof (struct elf_segment_map);
3528 amt += (to - from - 1) * sizeof (asection *);
3529 m = bfd_zalloc (abfd, amt);
3533 m->p_type = PT_LOAD;
3534 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3535 m->sections[i - from] = *hdrpp;
3536 m->count = to - from;
3538 if (from == 0 && phdr)
3540 /* Include the headers in the first PT_LOAD segment. */
3541 m->includes_filehdr = 1;
3542 m->includes_phdrs = 1;
3548 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3551 struct elf_segment_map *
3552 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3554 struct elf_segment_map *m;
3556 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3560 m->p_type = PT_DYNAMIC;
3562 m->sections[0] = dynsec;
3567 /* Set up a mapping from BFD sections to program segments. */
3570 map_sections_to_segments (bfd *abfd)
3572 asection **sections = NULL;
3576 struct elf_segment_map *mfirst;
3577 struct elf_segment_map **pm;
3578 struct elf_segment_map *m;
3581 unsigned int phdr_index;
3582 bfd_vma maxpagesize;
3584 bfd_boolean phdr_in_segment = TRUE;
3585 bfd_boolean writable;
3587 asection *first_tls = NULL;
3588 asection *dynsec, *eh_frame_hdr;
3591 if (elf_tdata (abfd)->segment_map != NULL)
3594 if (bfd_count_sections (abfd) == 0)
3597 /* Select the allocated sections, and sort them. */
3599 amt = bfd_count_sections (abfd) * sizeof (asection *);
3600 sections = bfd_malloc (amt);
3601 if (sections == NULL)
3605 for (s = abfd->sections; s != NULL; s = s->next)
3607 if ((s->flags & SEC_ALLOC) != 0)
3613 BFD_ASSERT (i <= bfd_count_sections (abfd));
3616 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3618 /* Build the mapping. */
3623 /* If we have a .interp section, then create a PT_PHDR segment for
3624 the program headers and a PT_INTERP segment for the .interp
3626 s = bfd_get_section_by_name (abfd, ".interp");
3627 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3629 amt = sizeof (struct elf_segment_map);
3630 m = bfd_zalloc (abfd, amt);
3634 m->p_type = PT_PHDR;
3635 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3636 m->p_flags = PF_R | PF_X;
3637 m->p_flags_valid = 1;
3638 m->includes_phdrs = 1;
3643 amt = sizeof (struct elf_segment_map);
3644 m = bfd_zalloc (abfd, amt);
3648 m->p_type = PT_INTERP;
3656 /* Look through the sections. We put sections in the same program
3657 segment when the start of the second section can be placed within
3658 a few bytes of the end of the first section. */
3662 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3664 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3666 && (dynsec->flags & SEC_LOAD) == 0)
3669 /* Deal with -Ttext or something similar such that the first section
3670 is not adjacent to the program headers. This is an
3671 approximation, since at this point we don't know exactly how many
3672 program headers we will need. */
3675 bfd_size_type phdr_size;
3677 phdr_size = elf_tdata (abfd)->program_header_size;
3679 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3680 if ((abfd->flags & D_PAGED) == 0
3681 || sections[0]->lma < phdr_size
3682 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3683 phdr_in_segment = FALSE;
3686 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3689 bfd_boolean new_segment;
3693 /* See if this section and the last one will fit in the same
3696 if (last_hdr == NULL)
3698 /* If we don't have a segment yet, then we don't need a new
3699 one (we build the last one after this loop). */
3700 new_segment = FALSE;
3702 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3704 /* If this section has a different relation between the
3705 virtual address and the load address, then we need a new
3709 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3710 < BFD_ALIGN (hdr->lma, maxpagesize))
3712 /* If putting this section in this segment would force us to
3713 skip a page in the segment, then we need a new segment. */
3716 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3717 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3719 /* We don't want to put a loadable section after a
3720 nonloadable section in the same segment.
3721 Consider .tbss sections as loadable for this purpose. */
3724 else if ((abfd->flags & D_PAGED) == 0)
3726 /* If the file is not demand paged, which means that we
3727 don't require the sections to be correctly aligned in the
3728 file, then there is no other reason for a new segment. */
3729 new_segment = FALSE;
3732 && (hdr->flags & SEC_READONLY) == 0
3733 && (((last_hdr->lma + last_size - 1)
3734 & ~(maxpagesize - 1))
3735 != (hdr->lma & ~(maxpagesize - 1))))
3737 /* We don't want to put a writable section in a read only
3738 segment, unless they are on the same page in memory
3739 anyhow. We already know that the last section does not
3740 bring us past the current section on the page, so the
3741 only case in which the new section is not on the same
3742 page as the previous section is when the previous section
3743 ends precisely on a page boundary. */
3748 /* Otherwise, we can use the same segment. */
3749 new_segment = FALSE;
3754 if ((hdr->flags & SEC_READONLY) == 0)
3757 /* .tbss sections effectively have zero size. */
3758 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3759 last_size = hdr->size;
3765 /* We need a new program segment. We must create a new program
3766 header holding all the sections from phdr_index until hdr. */
3768 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3775 if ((hdr->flags & SEC_READONLY) == 0)
3781 /* .tbss sections effectively have zero size. */
3782 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3783 last_size = hdr->size;
3787 phdr_in_segment = FALSE;
3790 /* Create a final PT_LOAD program segment. */
3791 if (last_hdr != NULL)
3793 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3801 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3804 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3811 /* For each loadable .note section, add a PT_NOTE segment. We don't
3812 use bfd_get_section_by_name, because if we link together
3813 nonloadable .note sections and loadable .note sections, we will
3814 generate two .note sections in the output file. FIXME: Using
3815 names for section types is bogus anyhow. */
3816 for (s = abfd->sections; s != NULL; s = s->next)
3818 if ((s->flags & SEC_LOAD) != 0
3819 && strncmp (s->name, ".note", 5) == 0)
3821 amt = sizeof (struct elf_segment_map);
3822 m = bfd_zalloc (abfd, amt);
3826 m->p_type = PT_NOTE;
3833 if (s->flags & SEC_THREAD_LOCAL)
3841 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3846 amt = sizeof (struct elf_segment_map);
3847 amt += (tls_count - 1) * sizeof (asection *);
3848 m = bfd_zalloc (abfd, amt);
3853 m->count = tls_count;
3854 /* Mandated PF_R. */
3856 m->p_flags_valid = 1;
3857 for (i = 0; i < tls_count; ++i)
3859 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3860 m->sections[i] = first_tls;
3861 first_tls = first_tls->next;
3868 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3870 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3871 if (eh_frame_hdr != NULL
3872 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3874 amt = sizeof (struct elf_segment_map);
3875 m = bfd_zalloc (abfd, amt);
3879 m->p_type = PT_GNU_EH_FRAME;
3881 m->sections[0] = eh_frame_hdr->output_section;
3887 if (elf_tdata (abfd)->stack_flags)
3889 amt = sizeof (struct elf_segment_map);
3890 m = bfd_zalloc (abfd, amt);
3894 m->p_type = PT_GNU_STACK;
3895 m->p_flags = elf_tdata (abfd)->stack_flags;
3896 m->p_flags_valid = 1;
3902 if (elf_tdata (abfd)->relro)
3904 amt = sizeof (struct elf_segment_map);
3905 m = bfd_zalloc (abfd, amt);
3909 m->p_type = PT_GNU_RELRO;
3911 m->p_flags_valid = 1;
3920 elf_tdata (abfd)->segment_map = mfirst;
3924 if (sections != NULL)
3929 /* Sort sections by address. */
3932 elf_sort_sections (const void *arg1, const void *arg2)
3934 const asection *sec1 = *(const asection **) arg1;
3935 const asection *sec2 = *(const asection **) arg2;
3936 bfd_size_type size1, size2;
3938 /* Sort by LMA first, since this is the address used to
3939 place the section into a segment. */
3940 if (sec1->lma < sec2->lma)
3942 else if (sec1->lma > sec2->lma)
3945 /* Then sort by VMA. Normally the LMA and the VMA will be
3946 the same, and this will do nothing. */
3947 if (sec1->vma < sec2->vma)
3949 else if (sec1->vma > sec2->vma)
3952 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3954 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3960 /* If the indicies are the same, do not return 0
3961 here, but continue to try the next comparison. */
3962 if (sec1->target_index - sec2->target_index != 0)
3963 return sec1->target_index - sec2->target_index;
3968 else if (TOEND (sec2))
3973 /* Sort by size, to put zero sized sections
3974 before others at the same address. */
3976 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
3977 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
3984 return sec1->target_index - sec2->target_index;
3987 /* Ian Lance Taylor writes:
3989 We shouldn't be using % with a negative signed number. That's just
3990 not good. We have to make sure either that the number is not
3991 negative, or that the number has an unsigned type. When the types
3992 are all the same size they wind up as unsigned. When file_ptr is a
3993 larger signed type, the arithmetic winds up as signed long long,
3996 What we're trying to say here is something like ``increase OFF by
3997 the least amount that will cause it to be equal to the VMA modulo
3999 /* In other words, something like:
4001 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4002 off_offset = off % bed->maxpagesize;
4003 if (vma_offset < off_offset)
4004 adjustment = vma_offset + bed->maxpagesize - off_offset;
4006 adjustment = vma_offset - off_offset;
4008 which can can be collapsed into the expression below. */
4011 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4013 return ((vma - off) % maxpagesize);
4016 /* Assign file positions to the sections based on the mapping from
4017 sections to segments. This function also sets up some fields in
4018 the file header, and writes out the program headers. */
4021 assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
4023 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4025 struct elf_segment_map *m;
4027 Elf_Internal_Phdr *phdrs;
4029 bfd_vma filehdr_vaddr, filehdr_paddr;
4030 bfd_vma phdrs_vaddr, phdrs_paddr;
4031 Elf_Internal_Phdr *p;
4034 if (elf_tdata (abfd)->segment_map == NULL)
4036 if (! map_sections_to_segments (abfd))
4041 /* The placement algorithm assumes that non allocated sections are
4042 not in PT_LOAD segments. We ensure this here by removing such
4043 sections from the segment map. */
4044 for (m = elf_tdata (abfd)->segment_map;
4048 unsigned int new_count;
4051 if (m->p_type != PT_LOAD)
4055 for (i = 0; i < m->count; i ++)
4057 if ((m->sections[i]->flags & SEC_ALLOC) != 0)
4060 m->sections[new_count] = m->sections[i];
4066 if (new_count != m->count)
4067 m->count = new_count;
4071 if (bed->elf_backend_modify_segment_map)
4073 if (! (*bed->elf_backend_modify_segment_map) (abfd, link_info))
4078 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4081 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4082 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4083 elf_elfheader (abfd)->e_phnum = count;
4087 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4091 /* If we already counted the number of program segments, make sure
4092 that we allocated enough space. This happens when SIZEOF_HEADERS
4093 is used in a linker script. */
4094 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
4095 if (alloc != 0 && count > alloc)
4097 ((*_bfd_error_handler)
4098 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
4099 abfd, alloc, count));
4100 bfd_set_error (bfd_error_bad_value);
4107 amt = alloc * sizeof (Elf_Internal_Phdr);
4108 phdrs = bfd_alloc (abfd, amt);
4112 off = bed->s->sizeof_ehdr;
4113 off += alloc * bed->s->sizeof_phdr;
4120 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4127 /* If elf_segment_map is not from map_sections_to_segments, the
4128 sections may not be correctly ordered. NOTE: sorting should
4129 not be done to the PT_NOTE section of a corefile, which may
4130 contain several pseudo-sections artificially created by bfd.
4131 Sorting these pseudo-sections breaks things badly. */
4133 && !(elf_elfheader (abfd)->e_type == ET_CORE
4134 && m->p_type == PT_NOTE))
4135 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4138 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4139 number of sections with contents contributing to both p_filesz
4140 and p_memsz, followed by a number of sections with no contents
4141 that just contribute to p_memsz. In this loop, OFF tracks next
4142 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
4143 an adjustment we use for segments that have no file contents
4144 but need zero filled memory allocation. */
4146 p->p_type = m->p_type;
4147 p->p_flags = m->p_flags;
4149 if (p->p_type == PT_LOAD
4152 bfd_size_type align;
4155 if ((abfd->flags & D_PAGED) != 0)
4156 align = bed->maxpagesize;
4159 unsigned int align_power = 0;
4160 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4162 unsigned int secalign;
4164 secalign = bfd_get_section_alignment (abfd, *secpp);
4165 if (secalign > align_power)
4166 align_power = secalign;
4168 align = (bfd_size_type) 1 << align_power;
4171 adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4174 && !m->includes_filehdr
4175 && !m->includes_phdrs
4176 && (ufile_ptr) off >= align)
4178 /* If the first section isn't loadable, the same holds for
4179 any other sections. Since the segment won't need file
4180 space, we can make p_offset overlap some prior segment.
4181 However, .tbss is special. If a segment starts with
4182 .tbss, we need to look at the next section to decide
4183 whether the segment has any loadable sections. */
4185 while ((m->sections[i]->flags & SEC_LOAD) == 0)
4187 if ((m->sections[i]->flags & SEC_THREAD_LOCAL) == 0
4191 voff = adjust - align;
4197 /* Make sure the .dynamic section is the first section in the
4198 PT_DYNAMIC segment. */
4199 else if (p->p_type == PT_DYNAMIC
4201 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4204 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4206 bfd_set_error (bfd_error_bad_value);
4213 p->p_vaddr = m->sections[0]->vma;
4215 if (m->p_paddr_valid)
4216 p->p_paddr = m->p_paddr;
4217 else if (m->count == 0)
4220 p->p_paddr = m->sections[0]->lma;
4222 if (p->p_type == PT_LOAD
4223 && (abfd->flags & D_PAGED) != 0)
4224 p->p_align = bed->maxpagesize;
4225 else if (m->count == 0)
4226 p->p_align = 1 << bed->s->log_file_align;
4234 if (m->includes_filehdr)
4236 if (! m->p_flags_valid)
4239 p->p_filesz = bed->s->sizeof_ehdr;
4240 p->p_memsz = bed->s->sizeof_ehdr;
4243 BFD_ASSERT (p->p_type == PT_LOAD);
4245 if (p->p_vaddr < (bfd_vma) off)
4247 (*_bfd_error_handler)
4248 (_("%B: Not enough room for program headers, try linking with -N"),
4250 bfd_set_error (bfd_error_bad_value);
4255 if (! m->p_paddr_valid)
4258 if (p->p_type == PT_LOAD)
4260 filehdr_vaddr = p->p_vaddr;
4261 filehdr_paddr = p->p_paddr;
4265 if (m->includes_phdrs)
4267 if (! m->p_flags_valid)
4270 if (m->includes_filehdr)
4272 if (p->p_type == PT_LOAD)
4274 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
4275 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
4280 p->p_offset = bed->s->sizeof_ehdr;
4284 BFD_ASSERT (p->p_type == PT_LOAD);
4285 p->p_vaddr -= off - p->p_offset;
4286 if (! m->p_paddr_valid)
4287 p->p_paddr -= off - p->p_offset;
4290 if (p->p_type == PT_LOAD)
4292 phdrs_vaddr = p->p_vaddr;
4293 phdrs_paddr = p->p_paddr;
4296 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4299 p->p_filesz += alloc * bed->s->sizeof_phdr;
4300 p->p_memsz += alloc * bed->s->sizeof_phdr;
4303 if (p->p_type == PT_LOAD
4304 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4306 if (! m->includes_filehdr && ! m->includes_phdrs)
4307 p->p_offset = off + voff;
4312 adjust = off - (p->p_offset + p->p_filesz);
4313 p->p_filesz += adjust;
4314 p->p_memsz += adjust;
4318 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4322 bfd_size_type align;
4326 align = 1 << bfd_get_section_alignment (abfd, sec);
4328 if (p->p_type == PT_LOAD
4329 || p->p_type == PT_TLS)
4331 bfd_signed_vma adjust;
4333 if ((flags & SEC_LOAD) != 0)
4335 adjust = sec->lma - (p->p_paddr + p->p_filesz);
4338 (*_bfd_error_handler)
4339 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4340 abfd, sec, (unsigned long) sec->lma);
4344 p->p_filesz += adjust;
4345 p->p_memsz += adjust;
4347 /* .tbss is special. It doesn't contribute to p_memsz of
4349 else if ((flags & SEC_THREAD_LOCAL) == 0
4350 || p->p_type == PT_TLS)
4352 /* The section VMA must equal the file position
4353 modulo the page size. */
4354 bfd_size_type page = align;
4355 if ((abfd->flags & D_PAGED) != 0)
4356 page = bed->maxpagesize;
4357 adjust = vma_page_aligned_bias (sec->vma,
4358 p->p_vaddr + p->p_memsz,
4360 p->p_memsz += adjust;
4364 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4366 /* The section at i == 0 is the one that actually contains
4372 p->p_filesz = sec->size;
4378 /* The rest are fake sections that shouldn't be written. */
4387 if (p->p_type == PT_LOAD)
4390 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4391 1997, and the exact reason for it isn't clear. One
4392 plausible explanation is that it is to work around
4393 a problem we have with linker scripts using data
4394 statements in NOLOAD sections. I don't think it
4395 makes a great deal of sense to have such a section
4396 assigned to a PT_LOAD segment, but apparently
4397 people do this. The data statement results in a
4398 bfd_data_link_order being built, and these need
4399 section contents to write into. Eventually, we get
4400 to _bfd_elf_write_object_contents which writes any
4401 section with contents to the output. Make room
4402 here for the write, so that following segments are
4404 if ((flags & SEC_LOAD) != 0
4405 || (flags & SEC_HAS_CONTENTS) != 0)
4409 if ((flags & SEC_LOAD) != 0)
4411 p->p_filesz += sec->size;
4412 p->p_memsz += sec->size;
4414 /* PR ld/594: Sections in note segments which are not loaded
4415 contribute to the file size but not the in-memory size. */
4416 else if (p->p_type == PT_NOTE
4417 && (flags & SEC_HAS_CONTENTS) != 0)
4418 p->p_filesz += sec->size;
4420 /* .tbss is special. It doesn't contribute to p_memsz of
4422 else if ((flags & SEC_THREAD_LOCAL) == 0
4423 || p->p_type == PT_TLS)
4424 p->p_memsz += sec->size;
4426 if (p->p_type == PT_TLS
4428 && (sec->flags & SEC_HAS_CONTENTS) == 0)
4430 struct bfd_link_order *o;
4431 bfd_vma tbss_size = 0;
4433 for (o = sec->map_head.link_order; o != NULL; o = o->next)
4434 if (tbss_size < o->offset + o->size)
4435 tbss_size = o->offset + o->size;
4437 p->p_memsz += tbss_size;
4440 if (align > p->p_align
4441 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
4445 if (! m->p_flags_valid)
4448 if ((flags & SEC_CODE) != 0)
4450 if ((flags & SEC_READONLY) == 0)
4456 /* Now that we have set the section file positions, we can set up
4457 the file positions for the non PT_LOAD segments. */
4458 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4462 if (p->p_type != PT_LOAD && m->count > 0)
4464 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
4465 /* If the section has not yet been assigned a file position,
4466 do so now. The ARM BPABI requires that .dynamic section
4467 not be marked SEC_ALLOC because it is not part of any
4468 PT_LOAD segment, so it will not be processed above. */
4469 if (p->p_type == PT_DYNAMIC && m->sections[0]->filepos == 0)
4472 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4475 while (i_shdrpp[i]->bfd_section != m->sections[0])
4477 off = (_bfd_elf_assign_file_position_for_section
4478 (i_shdrpp[i], off, TRUE));
4479 p->p_filesz = m->sections[0]->size;
4481 p->p_offset = m->sections[0]->filepos;
4485 if (m->includes_filehdr)
4487 p->p_vaddr = filehdr_vaddr;
4488 if (! m->p_paddr_valid)
4489 p->p_paddr = filehdr_paddr;
4491 else if (m->includes_phdrs)
4493 p->p_vaddr = phdrs_vaddr;
4494 if (! m->p_paddr_valid)
4495 p->p_paddr = phdrs_paddr;
4497 else if (p->p_type == PT_GNU_RELRO)
4499 Elf_Internal_Phdr *lp;
4501 for (lp = phdrs; lp < phdrs + count; ++lp)
4503 if (lp->p_type == PT_LOAD
4504 && lp->p_vaddr <= link_info->relro_end
4505 && lp->p_vaddr >= link_info->relro_start
4506 && lp->p_vaddr + lp->p_filesz
4507 >= link_info->relro_end)
4511 if (lp < phdrs + count
4512 && link_info->relro_end > lp->p_vaddr)
4514 p->p_vaddr = lp->p_vaddr;
4515 p->p_paddr = lp->p_paddr;
4516 p->p_offset = lp->p_offset;
4517 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4518 p->p_memsz = p->p_filesz;
4520 p->p_flags = (lp->p_flags & ~PF_W);
4524 memset (p, 0, sizeof *p);
4525 p->p_type = PT_NULL;
4531 /* Clear out any program headers we allocated but did not use. */
4532 for (; count < alloc; count++, p++)
4534 memset (p, 0, sizeof *p);
4535 p->p_type = PT_NULL;
4538 elf_tdata (abfd)->phdr = phdrs;
4540 elf_tdata (abfd)->next_file_pos = off;
4542 /* Write out the program headers. */
4543 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4544 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
4550 /* Get the size of the program header.
4552 If this is called by the linker before any of the section VMA's are set, it
4553 can't calculate the correct value for a strange memory layout. This only
4554 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4555 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4556 data segment (exclusive of .interp and .dynamic).
4558 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4559 will be two segments. */
4561 static bfd_size_type
4562 get_program_header_size (bfd *abfd)
4566 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4568 /* We can't return a different result each time we're called. */
4569 if (elf_tdata (abfd)->program_header_size != 0)
4570 return elf_tdata (abfd)->program_header_size;
4572 if (elf_tdata (abfd)->segment_map != NULL)
4574 struct elf_segment_map *m;
4577 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4579 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4580 return elf_tdata (abfd)->program_header_size;
4583 /* Assume we will need exactly two PT_LOAD segments: one for text
4584 and one for data. */
4587 s = bfd_get_section_by_name (abfd, ".interp");
4588 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4590 /* If we have a loadable interpreter section, we need a
4591 PT_INTERP segment. In this case, assume we also need a
4592 PT_PHDR segment, although that may not be true for all
4597 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4599 /* We need a PT_DYNAMIC segment. */
4603 if (elf_tdata (abfd)->eh_frame_hdr)
4605 /* We need a PT_GNU_EH_FRAME segment. */
4609 if (elf_tdata (abfd)->stack_flags)
4611 /* We need a PT_GNU_STACK segment. */
4615 if (elf_tdata (abfd)->relro)
4617 /* We need a PT_GNU_RELRO segment. */
4621 for (s = abfd->sections; s != NULL; s = s->next)
4623 if ((s->flags & SEC_LOAD) != 0
4624 && strncmp (s->name, ".note", 5) == 0)
4626 /* We need a PT_NOTE segment. */
4631 for (s = abfd->sections; s != NULL; s = s->next)
4633 if (s->flags & SEC_THREAD_LOCAL)
4635 /* We need a PT_TLS segment. */
4641 /* Let the backend count up any program headers it might need. */
4642 if (bed->elf_backend_additional_program_headers)
4646 a = (*bed->elf_backend_additional_program_headers) (abfd);
4652 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4653 return elf_tdata (abfd)->program_header_size;
4656 /* Work out the file positions of all the sections. This is called by
4657 _bfd_elf_compute_section_file_positions. All the section sizes and
4658 VMAs must be known before this is called.
4660 Reloc sections come in two flavours: Those processed specially as
4661 "side-channel" data attached to a section to which they apply, and
4662 those that bfd doesn't process as relocations. The latter sort are
4663 stored in a normal bfd section by bfd_section_from_shdr. We don't
4664 consider the former sort here, unless they form part of the loadable
4665 image. Reloc sections not assigned here will be handled later by
4666 assign_file_positions_for_relocs.
4668 We also don't set the positions of the .symtab and .strtab here. */
4671 assign_file_positions_except_relocs (bfd *abfd,
4672 struct bfd_link_info *link_info)
4674 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4675 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4676 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4677 unsigned int num_sec = elf_numsections (abfd);
4679 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4681 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4682 && bfd_get_format (abfd) != bfd_core)
4684 Elf_Internal_Shdr **hdrpp;
4687 /* Start after the ELF header. */
4688 off = i_ehdrp->e_ehsize;
4690 /* We are not creating an executable, which means that we are
4691 not creating a program header, and that the actual order of
4692 the sections in the file is unimportant. */
4693 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4695 Elf_Internal_Shdr *hdr;
4698 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4699 && hdr->bfd_section == NULL)
4700 || i == tdata->symtab_section
4701 || i == tdata->symtab_shndx_section
4702 || i == tdata->strtab_section)
4704 hdr->sh_offset = -1;
4707 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4709 if (i == SHN_LORESERVE - 1)
4711 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4712 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4719 Elf_Internal_Shdr **hdrpp;
4721 /* Assign file positions for the loaded sections based on the
4722 assignment of sections to segments. */
4723 if (! assign_file_positions_for_segments (abfd, link_info))
4726 /* Assign file positions for the other sections. */
4728 off = elf_tdata (abfd)->next_file_pos;
4729 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4731 Elf_Internal_Shdr *hdr;
4734 if (hdr->bfd_section != NULL
4735 && hdr->bfd_section->filepos != 0)
4736 hdr->sh_offset = hdr->bfd_section->filepos;
4737 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4739 ((*_bfd_error_handler)
4740 (_("%B: warning: allocated section `%s' not in segment"),
4742 (hdr->bfd_section == NULL
4744 : hdr->bfd_section->name)));
4745 if ((abfd->flags & D_PAGED) != 0)
4746 off += vma_page_aligned_bias (hdr->sh_addr, off,
4749 off += vma_page_aligned_bias (hdr->sh_addr, off,
4751 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4754 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4755 && hdr->bfd_section == NULL)
4756 || hdr == i_shdrpp[tdata->symtab_section]
4757 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4758 || hdr == i_shdrpp[tdata->strtab_section])
4759 hdr->sh_offset = -1;
4761 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4763 if (i == SHN_LORESERVE - 1)
4765 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4766 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4771 /* Place the section headers. */
4772 off = align_file_position (off, 1 << bed->s->log_file_align);
4773 i_ehdrp->e_shoff = off;
4774 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4776 elf_tdata (abfd)->next_file_pos = off;
4782 prep_headers (bfd *abfd)
4784 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4785 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4786 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4787 struct elf_strtab_hash *shstrtab;
4788 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4790 i_ehdrp = elf_elfheader (abfd);
4791 i_shdrp = elf_elfsections (abfd);
4793 shstrtab = _bfd_elf_strtab_init ();
4794 if (shstrtab == NULL)
4797 elf_shstrtab (abfd) = shstrtab;
4799 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4800 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4801 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4802 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4804 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4805 i_ehdrp->e_ident[EI_DATA] =
4806 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4807 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4809 if ((abfd->flags & DYNAMIC) != 0)
4810 i_ehdrp->e_type = ET_DYN;
4811 else if ((abfd->flags & EXEC_P) != 0)
4812 i_ehdrp->e_type = ET_EXEC;
4813 else if (bfd_get_format (abfd) == bfd_core)
4814 i_ehdrp->e_type = ET_CORE;
4816 i_ehdrp->e_type = ET_REL;
4818 switch (bfd_get_arch (abfd))
4820 case bfd_arch_unknown:
4821 i_ehdrp->e_machine = EM_NONE;
4824 /* There used to be a long list of cases here, each one setting
4825 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4826 in the corresponding bfd definition. To avoid duplication,
4827 the switch was removed. Machines that need special handling
4828 can generally do it in elf_backend_final_write_processing(),
4829 unless they need the information earlier than the final write.
4830 Such need can generally be supplied by replacing the tests for
4831 e_machine with the conditions used to determine it. */
4833 i_ehdrp->e_machine = bed->elf_machine_code;
4836 i_ehdrp->e_version = bed->s->ev_current;
4837 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4839 /* No program header, for now. */
4840 i_ehdrp->e_phoff = 0;
4841 i_ehdrp->e_phentsize = 0;
4842 i_ehdrp->e_phnum = 0;
4844 /* Each bfd section is section header entry. */
4845 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4846 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4848 /* If we're building an executable, we'll need a program header table. */
4849 if (abfd->flags & EXEC_P)
4850 /* It all happens later. */
4854 i_ehdrp->e_phentsize = 0;
4856 i_ehdrp->e_phoff = 0;
4859 elf_tdata (abfd)->symtab_hdr.sh_name =
4860 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4861 elf_tdata (abfd)->strtab_hdr.sh_name =
4862 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4863 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4864 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4865 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4866 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4867 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4873 /* Assign file positions for all the reloc sections which are not part
4874 of the loadable file image. */
4877 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4880 unsigned int i, num_sec;
4881 Elf_Internal_Shdr **shdrpp;
4883 off = elf_tdata (abfd)->next_file_pos;
4885 num_sec = elf_numsections (abfd);
4886 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4888 Elf_Internal_Shdr *shdrp;
4891 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4892 && shdrp->sh_offset == -1)
4893 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4896 elf_tdata (abfd)->next_file_pos = off;
4900 _bfd_elf_write_object_contents (bfd *abfd)
4902 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4903 Elf_Internal_Ehdr *i_ehdrp;
4904 Elf_Internal_Shdr **i_shdrp;
4906 unsigned int count, num_sec;
4908 if (! abfd->output_has_begun
4909 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4912 i_shdrp = elf_elfsections (abfd);
4913 i_ehdrp = elf_elfheader (abfd);
4916 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4920 _bfd_elf_assign_file_positions_for_relocs (abfd);
4922 /* After writing the headers, we need to write the sections too... */
4923 num_sec = elf_numsections (abfd);
4924 for (count = 1; count < num_sec; count++)
4926 if (bed->elf_backend_section_processing)
4927 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4928 if (i_shdrp[count]->contents)
4930 bfd_size_type amt = i_shdrp[count]->sh_size;
4932 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4933 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4936 if (count == SHN_LORESERVE - 1)
4937 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4940 /* Write out the section header names. */
4941 if (elf_shstrtab (abfd) != NULL
4942 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4943 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
4946 if (bed->elf_backend_final_write_processing)
4947 (*bed->elf_backend_final_write_processing) (abfd,
4948 elf_tdata (abfd)->linker);
4950 return bed->s->write_shdrs_and_ehdr (abfd);
4954 _bfd_elf_write_corefile_contents (bfd *abfd)
4956 /* Hopefully this can be done just like an object file. */
4957 return _bfd_elf_write_object_contents (abfd);
4960 /* Given a section, search the header to find them. */
4963 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4965 const struct elf_backend_data *bed;
4968 if (elf_section_data (asect) != NULL
4969 && elf_section_data (asect)->this_idx != 0)
4970 return elf_section_data (asect)->this_idx;
4972 if (bfd_is_abs_section (asect))
4974 else if (bfd_is_com_section (asect))
4976 else if (bfd_is_und_section (asect))
4981 bed = get_elf_backend_data (abfd);
4982 if (bed->elf_backend_section_from_bfd_section)
4986 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4991 bfd_set_error (bfd_error_nonrepresentable_section);
4996 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5000 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5002 asymbol *asym_ptr = *asym_ptr_ptr;
5004 flagword flags = asym_ptr->flags;
5006 /* When gas creates relocations against local labels, it creates its
5007 own symbol for the section, but does put the symbol into the
5008 symbol chain, so udata is 0. When the linker is generating
5009 relocatable output, this section symbol may be for one of the
5010 input sections rather than the output section. */
5011 if (asym_ptr->udata.i == 0
5012 && (flags & BSF_SECTION_SYM)
5013 && asym_ptr->section)
5017 if (asym_ptr->section->output_section != NULL)
5018 indx = asym_ptr->section->output_section->index;
5020 indx = asym_ptr->section->index;
5021 if (indx < elf_num_section_syms (abfd)
5022 && elf_section_syms (abfd)[indx] != NULL)
5023 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5026 idx = asym_ptr->udata.i;
5030 /* This case can occur when using --strip-symbol on a symbol
5031 which is used in a relocation entry. */
5032 (*_bfd_error_handler)
5033 (_("%B: symbol `%s' required but not present"),
5034 abfd, bfd_asymbol_name (asym_ptr));
5035 bfd_set_error (bfd_error_no_symbols);
5042 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5043 (long) asym_ptr, asym_ptr->name, idx, flags,
5044 elf_symbol_flags (flags));
5052 /* Copy private BFD data. This copies any program header information. */
5055 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5057 Elf_Internal_Ehdr *iehdr;
5058 struct elf_segment_map *map;
5059 struct elf_segment_map *map_first;
5060 struct elf_segment_map **pointer_to_map;
5061 Elf_Internal_Phdr *segment;
5064 unsigned int num_segments;
5065 bfd_boolean phdr_included = FALSE;
5066 bfd_vma maxpagesize;
5067 struct elf_segment_map *phdr_adjust_seg = NULL;
5068 unsigned int phdr_adjust_num = 0;
5069 const struct elf_backend_data *bed;
5071 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5072 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5075 if (elf_tdata (ibfd)->phdr == NULL)
5078 bed = get_elf_backend_data (ibfd);
5079 iehdr = elf_elfheader (ibfd);
5082 pointer_to_map = &map_first;
5084 num_segments = elf_elfheader (ibfd)->e_phnum;
5085 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5087 /* Returns the end address of the segment + 1. */
5088 #define SEGMENT_END(segment, start) \
5089 (start + (segment->p_memsz > segment->p_filesz \
5090 ? segment->p_memsz : segment->p_filesz))
5092 #define SECTION_SIZE(section, segment) \
5093 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5094 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5095 ? section->size : 0)
5097 /* Returns TRUE if the given section is contained within
5098 the given segment. VMA addresses are compared. */
5099 #define IS_CONTAINED_BY_VMA(section, segment) \
5100 (section->vma >= segment->p_vaddr \
5101 && (section->vma + SECTION_SIZE (section, segment) \
5102 <= (SEGMENT_END (segment, segment->p_vaddr))))
5104 /* Returns TRUE if the given section is contained within
5105 the given segment. LMA addresses are compared. */
5106 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5107 (section->lma >= base \
5108 && (section->lma + SECTION_SIZE (section, segment) \
5109 <= SEGMENT_END (segment, base)))
5111 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5112 #define IS_COREFILE_NOTE(p, s) \
5113 (p->p_type == PT_NOTE \
5114 && bfd_get_format (ibfd) == bfd_core \
5115 && s->vma == 0 && s->lma == 0 \
5116 && (bfd_vma) s->filepos >= p->p_offset \
5117 && ((bfd_vma) s->filepos + s->size \
5118 <= p->p_offset + p->p_filesz))
5120 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5121 linker, which generates a PT_INTERP section with p_vaddr and
5122 p_memsz set to 0. */
5123 #define IS_SOLARIS_PT_INTERP(p, s) \
5125 && p->p_paddr == 0 \
5126 && p->p_memsz == 0 \
5127 && p->p_filesz > 0 \
5128 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5130 && (bfd_vma) s->filepos >= p->p_offset \
5131 && ((bfd_vma) s->filepos + s->size \
5132 <= p->p_offset + p->p_filesz))
5134 /* Decide if the given section should be included in the given segment.
5135 A section will be included if:
5136 1. It is within the address space of the segment -- we use the LMA
5137 if that is set for the segment and the VMA otherwise,
5138 2. It is an allocated segment,
5139 3. There is an output section associated with it,
5140 4. The section has not already been allocated to a previous segment.
5141 5. PT_GNU_STACK segments do not include any sections.
5142 6. PT_TLS segment includes only SHF_TLS sections.
5143 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5144 8. PT_DYNAMIC should not contain empty sections at the beginning
5145 (with the possible exception of .dynamic). */
5146 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5147 ((((segment->p_paddr \
5148 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5149 : IS_CONTAINED_BY_VMA (section, segment)) \
5150 && (section->flags & SEC_ALLOC) != 0) \
5151 || IS_COREFILE_NOTE (segment, section)) \
5152 && section->output_section != NULL \
5153 && segment->p_type != PT_GNU_STACK \
5154 && (segment->p_type != PT_TLS \
5155 || (section->flags & SEC_THREAD_LOCAL)) \
5156 && (segment->p_type == PT_LOAD \
5157 || segment->p_type == PT_TLS \
5158 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5159 && (segment->p_type != PT_DYNAMIC \
5160 || SECTION_SIZE (section, segment) > 0 \
5161 || (segment->p_paddr \
5162 ? segment->p_paddr != section->lma \
5163 : segment->p_vaddr != section->vma) \
5164 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5166 && ! section->segment_mark)
5168 /* Returns TRUE iff seg1 starts after the end of seg2. */
5169 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5170 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5172 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5173 their VMA address ranges and their LMA address ranges overlap.
5174 It is possible to have overlapping VMA ranges without overlapping LMA
5175 ranges. RedBoot images for example can have both .data and .bss mapped
5176 to the same VMA range, but with the .data section mapped to a different
5178 #define SEGMENT_OVERLAPS(seg1, seg2) \
5179 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5180 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5181 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5182 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5184 /* Initialise the segment mark field. */
5185 for (section = ibfd->sections; section != NULL; section = section->next)
5186 section->segment_mark = FALSE;
5188 /* Scan through the segments specified in the program header
5189 of the input BFD. For this first scan we look for overlaps
5190 in the loadable segments. These can be created by weird
5191 parameters to objcopy. Also, fix some solaris weirdness. */
5192 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5197 Elf_Internal_Phdr *segment2;
5199 if (segment->p_type == PT_INTERP)
5200 for (section = ibfd->sections; section; section = section->next)
5201 if (IS_SOLARIS_PT_INTERP (segment, section))
5203 /* Mininal change so that the normal section to segment
5204 assignment code will work. */
5205 segment->p_vaddr = section->vma;
5209 if (segment->p_type != PT_LOAD)
5212 /* Determine if this segment overlaps any previous segments. */
5213 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
5215 bfd_signed_vma extra_length;
5217 if (segment2->p_type != PT_LOAD
5218 || ! SEGMENT_OVERLAPS (segment, segment2))
5221 /* Merge the two segments together. */
5222 if (segment2->p_vaddr < segment->p_vaddr)
5224 /* Extend SEGMENT2 to include SEGMENT and then delete
5227 SEGMENT_END (segment, segment->p_vaddr)
5228 - SEGMENT_END (segment2, segment2->p_vaddr);
5230 if (extra_length > 0)
5232 segment2->p_memsz += extra_length;
5233 segment2->p_filesz += extra_length;
5236 segment->p_type = PT_NULL;
5238 /* Since we have deleted P we must restart the outer loop. */
5240 segment = elf_tdata (ibfd)->phdr;
5245 /* Extend SEGMENT to include SEGMENT2 and then delete
5248 SEGMENT_END (segment2, segment2->p_vaddr)
5249 - SEGMENT_END (segment, segment->p_vaddr);
5251 if (extra_length > 0)
5253 segment->p_memsz += extra_length;
5254 segment->p_filesz += extra_length;
5257 segment2->p_type = PT_NULL;
5262 /* The second scan attempts to assign sections to segments. */
5263 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5267 unsigned int section_count;
5268 asection ** sections;
5269 asection * output_section;
5271 bfd_vma matching_lma;
5272 bfd_vma suggested_lma;
5276 if (segment->p_type == PT_NULL)
5279 /* Compute how many sections might be placed into this segment. */
5280 for (section = ibfd->sections, section_count = 0;
5282 section = section->next)
5283 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5286 /* Allocate a segment map big enough to contain
5287 all of the sections we have selected. */
5288 amt = sizeof (struct elf_segment_map);
5289 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5290 map = bfd_alloc (obfd, amt);
5294 /* Initialise the fields of the segment map. Default to
5295 using the physical address of the segment in the input BFD. */
5297 map->p_type = segment->p_type;
5298 map->p_flags = segment->p_flags;
5299 map->p_flags_valid = 1;
5300 map->p_paddr = segment->p_paddr;
5301 map->p_paddr_valid = 1;
5303 /* Determine if this segment contains the ELF file header
5304 and if it contains the program headers themselves. */
5305 map->includes_filehdr = (segment->p_offset == 0
5306 && segment->p_filesz >= iehdr->e_ehsize);
5308 map->includes_phdrs = 0;
5310 if (! phdr_included || segment->p_type != PT_LOAD)
5312 map->includes_phdrs =
5313 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5314 && (segment->p_offset + segment->p_filesz
5315 >= ((bfd_vma) iehdr->e_phoff
5316 + iehdr->e_phnum * iehdr->e_phentsize)));
5318 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5319 phdr_included = TRUE;
5322 if (section_count == 0)
5324 /* Special segments, such as the PT_PHDR segment, may contain
5325 no sections, but ordinary, loadable segments should contain
5326 something. They are allowed by the ELF spec however, so only
5327 a warning is produced. */
5328 if (segment->p_type == PT_LOAD)
5329 (*_bfd_error_handler)
5330 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5334 *pointer_to_map = map;
5335 pointer_to_map = &map->next;
5340 /* Now scan the sections in the input BFD again and attempt
5341 to add their corresponding output sections to the segment map.
5342 The problem here is how to handle an output section which has
5343 been moved (ie had its LMA changed). There are four possibilities:
5345 1. None of the sections have been moved.
5346 In this case we can continue to use the segment LMA from the
5349 2. All of the sections have been moved by the same amount.
5350 In this case we can change the segment's LMA to match the LMA
5351 of the first section.
5353 3. Some of the sections have been moved, others have not.
5354 In this case those sections which have not been moved can be
5355 placed in the current segment which will have to have its size,
5356 and possibly its LMA changed, and a new segment or segments will
5357 have to be created to contain the other sections.
5359 4. The sections have been moved, but not by the same amount.
5360 In this case we can change the segment's LMA to match the LMA
5361 of the first section and we will have to create a new segment
5362 or segments to contain the other sections.
5364 In order to save time, we allocate an array to hold the section
5365 pointers that we are interested in. As these sections get assigned
5366 to a segment, they are removed from this array. */
5368 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5369 to work around this long long bug. */
5370 amt = section_count * sizeof (asection *);
5371 sections = bfd_malloc (amt);
5372 if (sections == NULL)
5375 /* Step One: Scan for segment vs section LMA conflicts.
5376 Also add the sections to the section array allocated above.
5377 Also add the sections to the current segment. In the common
5378 case, where the sections have not been moved, this means that
5379 we have completely filled the segment, and there is nothing
5385 for (j = 0, section = ibfd->sections;
5387 section = section->next)
5389 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5391 output_section = section->output_section;
5393 sections[j ++] = section;
5395 /* The Solaris native linker always sets p_paddr to 0.
5396 We try to catch that case here, and set it to the
5397 correct value. Note - some backends require that
5398 p_paddr be left as zero. */
5399 if (segment->p_paddr == 0
5400 && segment->p_vaddr != 0
5401 && (! bed->want_p_paddr_set_to_zero)
5403 && output_section->lma != 0
5404 && (output_section->vma == (segment->p_vaddr
5405 + (map->includes_filehdr
5408 + (map->includes_phdrs
5410 * iehdr->e_phentsize)
5412 map->p_paddr = segment->p_vaddr;
5414 /* Match up the physical address of the segment with the
5415 LMA address of the output section. */
5416 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5417 || IS_COREFILE_NOTE (segment, section)
5418 || (bed->want_p_paddr_set_to_zero &&
5419 IS_CONTAINED_BY_VMA (output_section, segment))
5422 if (matching_lma == 0)
5423 matching_lma = output_section->lma;
5425 /* We assume that if the section fits within the segment
5426 then it does not overlap any other section within that
5428 map->sections[isec ++] = output_section;
5430 else if (suggested_lma == 0)
5431 suggested_lma = output_section->lma;
5435 BFD_ASSERT (j == section_count);
5437 /* Step Two: Adjust the physical address of the current segment,
5439 if (isec == section_count)
5441 /* All of the sections fitted within the segment as currently
5442 specified. This is the default case. Add the segment to
5443 the list of built segments and carry on to process the next
5444 program header in the input BFD. */
5445 map->count = section_count;
5446 *pointer_to_map = map;
5447 pointer_to_map = &map->next;
5454 if (matching_lma != 0)
5456 /* At least one section fits inside the current segment.
5457 Keep it, but modify its physical address to match the
5458 LMA of the first section that fitted. */
5459 map->p_paddr = matching_lma;
5463 /* None of the sections fitted inside the current segment.
5464 Change the current segment's physical address to match
5465 the LMA of the first section. */
5466 map->p_paddr = suggested_lma;
5469 /* Offset the segment physical address from the lma
5470 to allow for space taken up by elf headers. */
5471 if (map->includes_filehdr)
5472 map->p_paddr -= iehdr->e_ehsize;
5474 if (map->includes_phdrs)
5476 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5478 /* iehdr->e_phnum is just an estimate of the number
5479 of program headers that we will need. Make a note
5480 here of the number we used and the segment we chose
5481 to hold these headers, so that we can adjust the
5482 offset when we know the correct value. */
5483 phdr_adjust_num = iehdr->e_phnum;
5484 phdr_adjust_seg = map;
5488 /* Step Three: Loop over the sections again, this time assigning
5489 those that fit to the current segment and removing them from the
5490 sections array; but making sure not to leave large gaps. Once all
5491 possible sections have been assigned to the current segment it is
5492 added to the list of built segments and if sections still remain
5493 to be assigned, a new segment is constructed before repeating
5501 /* Fill the current segment with sections that fit. */
5502 for (j = 0; j < section_count; j++)
5504 section = sections[j];
5506 if (section == NULL)
5509 output_section = section->output_section;
5511 BFD_ASSERT (output_section != NULL);
5513 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5514 || IS_COREFILE_NOTE (segment, section))
5516 if (map->count == 0)
5518 /* If the first section in a segment does not start at
5519 the beginning of the segment, then something is
5521 if (output_section->lma !=
5523 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5524 + (map->includes_phdrs
5525 ? iehdr->e_phnum * iehdr->e_phentsize
5531 asection * prev_sec;
5533 prev_sec = map->sections[map->count - 1];
5535 /* If the gap between the end of the previous section
5536 and the start of this section is more than
5537 maxpagesize then we need to start a new segment. */
5538 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5540 < BFD_ALIGN (output_section->lma, maxpagesize))
5541 || ((prev_sec->lma + prev_sec->size)
5542 > output_section->lma))
5544 if (suggested_lma == 0)
5545 suggested_lma = output_section->lma;
5551 map->sections[map->count++] = output_section;
5554 section->segment_mark = TRUE;
5556 else if (suggested_lma == 0)
5557 suggested_lma = output_section->lma;
5560 BFD_ASSERT (map->count > 0);
5562 /* Add the current segment to the list of built segments. */
5563 *pointer_to_map = map;
5564 pointer_to_map = &map->next;
5566 if (isec < section_count)
5568 /* We still have not allocated all of the sections to
5569 segments. Create a new segment here, initialise it
5570 and carry on looping. */
5571 amt = sizeof (struct elf_segment_map);
5572 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5573 map = bfd_alloc (obfd, amt);
5580 /* Initialise the fields of the segment map. Set the physical
5581 physical address to the LMA of the first section that has
5582 not yet been assigned. */
5584 map->p_type = segment->p_type;
5585 map->p_flags = segment->p_flags;
5586 map->p_flags_valid = 1;
5587 map->p_paddr = suggested_lma;
5588 map->p_paddr_valid = 1;
5589 map->includes_filehdr = 0;
5590 map->includes_phdrs = 0;
5593 while (isec < section_count);
5598 /* The Solaris linker creates program headers in which all the
5599 p_paddr fields are zero. When we try to objcopy or strip such a
5600 file, we get confused. Check for this case, and if we find it
5601 reset the p_paddr_valid fields. */
5602 for (map = map_first; map != NULL; map = map->next)
5603 if (map->p_paddr != 0)
5606 for (map = map_first; map != NULL; map = map->next)
5607 map->p_paddr_valid = 0;
5609 elf_tdata (obfd)->segment_map = map_first;
5611 /* If we had to estimate the number of program headers that were
5612 going to be needed, then check our estimate now and adjust
5613 the offset if necessary. */
5614 if (phdr_adjust_seg != NULL)
5618 for (count = 0, map = map_first; map != NULL; map = map->next)
5621 if (count > phdr_adjust_num)
5622 phdr_adjust_seg->p_paddr
5623 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5628 #undef IS_CONTAINED_BY_VMA
5629 #undef IS_CONTAINED_BY_LMA
5630 #undef IS_COREFILE_NOTE
5631 #undef IS_SOLARIS_PT_INTERP
5632 #undef INCLUDE_SECTION_IN_SEGMENT
5633 #undef SEGMENT_AFTER_SEGMENT
5634 #undef SEGMENT_OVERLAPS
5638 /* Copy private section information. This copies over the entsize
5639 field, and sometimes the info field. */
5642 _bfd_elf_copy_private_section_data (bfd *ibfd,
5647 Elf_Internal_Shdr *ihdr, *ohdr;
5649 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5650 || obfd->xvec->flavour != bfd_target_elf_flavour)
5653 ihdr = &elf_section_data (isec)->this_hdr;
5654 ohdr = &elf_section_data (osec)->this_hdr;
5656 ohdr->sh_entsize = ihdr->sh_entsize;
5658 if (ihdr->sh_type == SHT_SYMTAB
5659 || ihdr->sh_type == SHT_DYNSYM
5660 || ihdr->sh_type == SHT_GNU_verneed
5661 || ihdr->sh_type == SHT_GNU_verdef)
5662 ohdr->sh_info = ihdr->sh_info;
5664 /* Set things up for objcopy. The output SHT_GROUP section will
5665 have its elf_next_in_group pointing back to the input group
5666 members. Ignore linker created group section. See
5667 elfNN_ia64_object_p in elfxx-ia64.c. */
5668 if (elf_sec_group (isec) == NULL
5669 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
5671 elf_next_in_group (osec) = elf_next_in_group (isec);
5672 elf_group_name (osec) = elf_group_name (isec);
5675 osec->use_rela_p = isec->use_rela_p;
5680 /* Copy private header information. */
5683 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
5685 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5686 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5689 /* Copy over private BFD data if it has not already been copied.
5690 This must be done here, rather than in the copy_private_bfd_data
5691 entry point, because the latter is called after the section
5692 contents have been set, which means that the program headers have
5693 already been worked out. */
5694 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5696 if (! copy_private_bfd_data (ibfd, obfd))
5703 /* Copy private symbol information. If this symbol is in a section
5704 which we did not map into a BFD section, try to map the section
5705 index correctly. We use special macro definitions for the mapped
5706 section indices; these definitions are interpreted by the
5707 swap_out_syms function. */
5709 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5710 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5711 #define MAP_STRTAB (SHN_HIOS + 3)
5712 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5713 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5716 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
5721 elf_symbol_type *isym, *osym;
5723 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5724 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5727 isym = elf_symbol_from (ibfd, isymarg);
5728 osym = elf_symbol_from (obfd, osymarg);
5732 && bfd_is_abs_section (isym->symbol.section))
5736 shndx = isym->internal_elf_sym.st_shndx;
5737 if (shndx == elf_onesymtab (ibfd))
5738 shndx = MAP_ONESYMTAB;
5739 else if (shndx == elf_dynsymtab (ibfd))
5740 shndx = MAP_DYNSYMTAB;
5741 else if (shndx == elf_tdata (ibfd)->strtab_section)
5743 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5744 shndx = MAP_SHSTRTAB;
5745 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5746 shndx = MAP_SYM_SHNDX;
5747 osym->internal_elf_sym.st_shndx = shndx;
5753 /* Swap out the symbols. */
5756 swap_out_syms (bfd *abfd,
5757 struct bfd_strtab_hash **sttp,
5760 const struct elf_backend_data *bed;
5763 struct bfd_strtab_hash *stt;
5764 Elf_Internal_Shdr *symtab_hdr;
5765 Elf_Internal_Shdr *symtab_shndx_hdr;
5766 Elf_Internal_Shdr *symstrtab_hdr;
5767 bfd_byte *outbound_syms;
5768 bfd_byte *outbound_shndx;
5771 bfd_boolean name_local_sections;
5773 if (!elf_map_symbols (abfd))
5776 /* Dump out the symtabs. */
5777 stt = _bfd_elf_stringtab_init ();
5781 bed = get_elf_backend_data (abfd);
5782 symcount = bfd_get_symcount (abfd);
5783 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5784 symtab_hdr->sh_type = SHT_SYMTAB;
5785 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5786 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5787 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5788 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
5790 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5791 symstrtab_hdr->sh_type = SHT_STRTAB;
5793 amt = (bfd_size_type) (1 + symcount) * bed->s->sizeof_sym;
5794 outbound_syms = bfd_alloc (abfd, amt);
5795 if (outbound_syms == NULL)
5797 _bfd_stringtab_free (stt);
5800 symtab_hdr->contents = outbound_syms;
5802 outbound_shndx = NULL;
5803 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5804 if (symtab_shndx_hdr->sh_name != 0)
5806 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
5807 outbound_shndx = bfd_zalloc (abfd, amt);
5808 if (outbound_shndx == NULL)
5810 _bfd_stringtab_free (stt);
5814 symtab_shndx_hdr->contents = outbound_shndx;
5815 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5816 symtab_shndx_hdr->sh_size = amt;
5817 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5818 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5821 /* Now generate the data (for "contents"). */
5823 /* Fill in zeroth symbol and swap it out. */
5824 Elf_Internal_Sym sym;
5830 sym.st_shndx = SHN_UNDEF;
5831 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5832 outbound_syms += bed->s->sizeof_sym;
5833 if (outbound_shndx != NULL)
5834 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5838 = (bed->elf_backend_name_local_section_symbols
5839 && bed->elf_backend_name_local_section_symbols (abfd));
5841 syms = bfd_get_outsymbols (abfd);
5842 for (idx = 0; idx < symcount; idx++)
5844 Elf_Internal_Sym sym;
5845 bfd_vma value = syms[idx]->value;
5846 elf_symbol_type *type_ptr;
5847 flagword flags = syms[idx]->flags;
5850 if (!name_local_sections
5851 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
5853 /* Local section symbols have no name. */
5858 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5861 if (sym.st_name == (unsigned long) -1)
5863 _bfd_stringtab_free (stt);
5868 type_ptr = elf_symbol_from (abfd, syms[idx]);
5870 if ((flags & BSF_SECTION_SYM) == 0
5871 && bfd_is_com_section (syms[idx]->section))
5873 /* ELF common symbols put the alignment into the `value' field,
5874 and the size into the `size' field. This is backwards from
5875 how BFD handles it, so reverse it here. */
5876 sym.st_size = value;
5877 if (type_ptr == NULL
5878 || type_ptr->internal_elf_sym.st_value == 0)
5879 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5881 sym.st_value = type_ptr->internal_elf_sym.st_value;
5882 sym.st_shndx = _bfd_elf_section_from_bfd_section
5883 (abfd, syms[idx]->section);
5887 asection *sec = syms[idx]->section;
5890 if (sec->output_section)
5892 value += sec->output_offset;
5893 sec = sec->output_section;
5896 /* Don't add in the section vma for relocatable output. */
5897 if (! relocatable_p)
5899 sym.st_value = value;
5900 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5902 if (bfd_is_abs_section (sec)
5904 && type_ptr->internal_elf_sym.st_shndx != 0)
5906 /* This symbol is in a real ELF section which we did
5907 not create as a BFD section. Undo the mapping done
5908 by copy_private_symbol_data. */
5909 shndx = type_ptr->internal_elf_sym.st_shndx;
5913 shndx = elf_onesymtab (abfd);
5916 shndx = elf_dynsymtab (abfd);
5919 shndx = elf_tdata (abfd)->strtab_section;
5922 shndx = elf_tdata (abfd)->shstrtab_section;
5925 shndx = elf_tdata (abfd)->symtab_shndx_section;
5933 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5939 /* Writing this would be a hell of a lot easier if
5940 we had some decent documentation on bfd, and
5941 knew what to expect of the library, and what to
5942 demand of applications. For example, it
5943 appears that `objcopy' might not set the
5944 section of a symbol to be a section that is
5945 actually in the output file. */
5946 sec2 = bfd_get_section_by_name (abfd, sec->name);
5949 _bfd_error_handler (_("\
5950 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5951 syms[idx]->name ? syms[idx]->name : "<Local sym>",
5953 bfd_set_error (bfd_error_invalid_operation);
5954 _bfd_stringtab_free (stt);
5958 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5959 BFD_ASSERT (shndx != -1);
5963 sym.st_shndx = shndx;
5966 if ((flags & BSF_THREAD_LOCAL) != 0)
5968 else if ((flags & BSF_FUNCTION) != 0)
5970 else if ((flags & BSF_OBJECT) != 0)
5975 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
5978 /* Processor-specific types. */
5979 if (type_ptr != NULL
5980 && bed->elf_backend_get_symbol_type)
5981 type = ((*bed->elf_backend_get_symbol_type)
5982 (&type_ptr->internal_elf_sym, type));
5984 if (flags & BSF_SECTION_SYM)
5986 if (flags & BSF_GLOBAL)
5987 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
5989 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
5991 else if (bfd_is_com_section (syms[idx]->section))
5992 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
5993 else if (bfd_is_und_section (syms[idx]->section))
5994 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
5998 else if (flags & BSF_FILE)
5999 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6002 int bind = STB_LOCAL;
6004 if (flags & BSF_LOCAL)
6006 else if (flags & BSF_WEAK)
6008 else if (flags & BSF_GLOBAL)
6011 sym.st_info = ELF_ST_INFO (bind, type);
6014 if (type_ptr != NULL)
6015 sym.st_other = type_ptr->internal_elf_sym.st_other;
6019 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6020 outbound_syms += bed->s->sizeof_sym;
6021 if (outbound_shndx != NULL)
6022 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6026 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6027 symstrtab_hdr->sh_type = SHT_STRTAB;
6029 symstrtab_hdr->sh_flags = 0;
6030 symstrtab_hdr->sh_addr = 0;
6031 symstrtab_hdr->sh_entsize = 0;
6032 symstrtab_hdr->sh_link = 0;
6033 symstrtab_hdr->sh_info = 0;
6034 symstrtab_hdr->sh_addralign = 1;
6039 /* Return the number of bytes required to hold the symtab vector.
6041 Note that we base it on the count plus 1, since we will null terminate
6042 the vector allocated based on this size. However, the ELF symbol table
6043 always has a dummy entry as symbol #0, so it ends up even. */
6046 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6050 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6052 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6053 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6055 symtab_size -= sizeof (asymbol *);
6061 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6065 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6067 if (elf_dynsymtab (abfd) == 0)
6069 bfd_set_error (bfd_error_invalid_operation);
6073 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6074 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6076 symtab_size -= sizeof (asymbol *);
6082 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6085 return (asect->reloc_count + 1) * sizeof (arelent *);
6088 /* Canonicalize the relocs. */
6091 _bfd_elf_canonicalize_reloc (bfd *abfd,
6098 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6100 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6103 tblptr = section->relocation;
6104 for (i = 0; i < section->reloc_count; i++)
6105 *relptr++ = tblptr++;
6109 return section->reloc_count;
6113 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6115 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6116 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6119 bfd_get_symcount (abfd) = symcount;
6124 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6125 asymbol **allocation)
6127 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6128 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6131 bfd_get_dynamic_symcount (abfd) = symcount;
6135 /* Return the size required for the dynamic reloc entries. Any loadable
6136 section that was actually installed in the BFD, and has type SHT_REL
6137 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6138 dynamic reloc section. */
6141 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6146 if (elf_dynsymtab (abfd) == 0)
6148 bfd_set_error (bfd_error_invalid_operation);
6152 ret = sizeof (arelent *);
6153 for (s = abfd->sections; s != NULL; s = s->next)
6154 if ((s->flags & SEC_LOAD) != 0
6155 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6156 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6157 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6158 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6159 * sizeof (arelent *));
6164 /* Canonicalize the dynamic relocation entries. Note that we return the
6165 dynamic relocations as a single block, although they are actually
6166 associated with particular sections; the interface, which was
6167 designed for SunOS style shared libraries, expects that there is only
6168 one set of dynamic relocs. Any loadable section that was actually
6169 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6170 dynamic symbol table, is considered to be a dynamic reloc section. */
6173 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6177 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6181 if (elf_dynsymtab (abfd) == 0)
6183 bfd_set_error (bfd_error_invalid_operation);
6187 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6189 for (s = abfd->sections; s != NULL; s = s->next)
6191 if ((s->flags & SEC_LOAD) != 0
6192 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6193 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6194 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6199 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6201 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6203 for (i = 0; i < count; i++)
6214 /* Read in the version information. */
6217 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6219 bfd_byte *contents = NULL;
6221 unsigned int freeidx = 0;
6223 if (elf_dynverref (abfd) != 0)
6225 Elf_Internal_Shdr *hdr;
6226 Elf_External_Verneed *everneed;
6227 Elf_Internal_Verneed *iverneed;
6230 hdr = &elf_tdata (abfd)->dynverref_hdr;
6232 amt = (bfd_size_type) hdr->sh_info * sizeof (Elf_Internal_Verneed);
6233 elf_tdata (abfd)->verref = bfd_zalloc (abfd, amt);
6234 if (elf_tdata (abfd)->verref == NULL)
6237 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6239 contents = bfd_malloc (hdr->sh_size);
6240 if (contents == NULL)
6242 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6243 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6246 everneed = (Elf_External_Verneed *) contents;
6247 iverneed = elf_tdata (abfd)->verref;
6248 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6250 Elf_External_Vernaux *evernaux;
6251 Elf_Internal_Vernaux *ivernaux;
6254 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6256 iverneed->vn_bfd = abfd;
6258 iverneed->vn_filename =
6259 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6261 if (iverneed->vn_filename == NULL)
6264 amt = iverneed->vn_cnt;
6265 amt *= sizeof (Elf_Internal_Vernaux);
6266 iverneed->vn_auxptr = bfd_alloc (abfd, amt);
6268 evernaux = ((Elf_External_Vernaux *)
6269 ((bfd_byte *) everneed + iverneed->vn_aux));
6270 ivernaux = iverneed->vn_auxptr;
6271 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6273 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6275 ivernaux->vna_nodename =
6276 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6277 ivernaux->vna_name);
6278 if (ivernaux->vna_nodename == NULL)
6281 if (j + 1 < iverneed->vn_cnt)
6282 ivernaux->vna_nextptr = ivernaux + 1;
6284 ivernaux->vna_nextptr = NULL;
6286 evernaux = ((Elf_External_Vernaux *)
6287 ((bfd_byte *) evernaux + ivernaux->vna_next));
6289 if (ivernaux->vna_other > freeidx)
6290 freeidx = ivernaux->vna_other;
6293 if (i + 1 < hdr->sh_info)
6294 iverneed->vn_nextref = iverneed + 1;
6296 iverneed->vn_nextref = NULL;
6298 everneed = ((Elf_External_Verneed *)
6299 ((bfd_byte *) everneed + iverneed->vn_next));
6306 if (elf_dynverdef (abfd) != 0)
6308 Elf_Internal_Shdr *hdr;
6309 Elf_External_Verdef *everdef;
6310 Elf_Internal_Verdef *iverdef;
6311 Elf_Internal_Verdef *iverdefarr;
6312 Elf_Internal_Verdef iverdefmem;
6314 unsigned int maxidx;
6316 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6318 contents = bfd_malloc (hdr->sh_size);
6319 if (contents == NULL)
6321 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6322 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6325 /* We know the number of entries in the section but not the maximum
6326 index. Therefore we have to run through all entries and find
6328 everdef = (Elf_External_Verdef *) contents;
6330 for (i = 0; i < hdr->sh_info; ++i)
6332 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6334 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6335 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6337 everdef = ((Elf_External_Verdef *)
6338 ((bfd_byte *) everdef + iverdefmem.vd_next));
6341 if (default_imported_symver)
6343 if (freeidx > maxidx)
6348 amt = (bfd_size_type) maxidx * sizeof (Elf_Internal_Verdef);
6349 elf_tdata (abfd)->verdef = bfd_zalloc (abfd, amt);
6350 if (elf_tdata (abfd)->verdef == NULL)
6353 elf_tdata (abfd)->cverdefs = maxidx;
6355 everdef = (Elf_External_Verdef *) contents;
6356 iverdefarr = elf_tdata (abfd)->verdef;
6357 for (i = 0; i < hdr->sh_info; i++)
6359 Elf_External_Verdaux *everdaux;
6360 Elf_Internal_Verdaux *iverdaux;
6363 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6365 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6366 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6368 iverdef->vd_bfd = abfd;
6370 amt = (bfd_size_type) iverdef->vd_cnt * sizeof (Elf_Internal_Verdaux);
6371 iverdef->vd_auxptr = bfd_alloc (abfd, amt);
6372 if (iverdef->vd_auxptr == NULL)
6375 everdaux = ((Elf_External_Verdaux *)
6376 ((bfd_byte *) everdef + iverdef->vd_aux));
6377 iverdaux = iverdef->vd_auxptr;
6378 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6380 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6382 iverdaux->vda_nodename =
6383 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6384 iverdaux->vda_name);
6385 if (iverdaux->vda_nodename == NULL)
6388 if (j + 1 < iverdef->vd_cnt)
6389 iverdaux->vda_nextptr = iverdaux + 1;
6391 iverdaux->vda_nextptr = NULL;
6393 everdaux = ((Elf_External_Verdaux *)
6394 ((bfd_byte *) everdaux + iverdaux->vda_next));
6397 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6399 if (i + 1 < hdr->sh_info)
6400 iverdef->vd_nextdef = iverdef + 1;
6402 iverdef->vd_nextdef = NULL;
6404 everdef = ((Elf_External_Verdef *)
6405 ((bfd_byte *) everdef + iverdef->vd_next));
6411 else if (default_imported_symver)
6418 amt = (bfd_size_type) freeidx * sizeof (Elf_Internal_Verdef);
6419 elf_tdata (abfd)->verdef = bfd_zalloc (abfd, amt);
6420 if (elf_tdata (abfd)->verdef == NULL)
6423 elf_tdata (abfd)->cverdefs = freeidx;
6426 /* Create a default version based on the soname. */
6427 if (default_imported_symver)
6429 Elf_Internal_Verdef *iverdef;
6430 Elf_Internal_Verdaux *iverdaux;
6432 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6434 iverdef->vd_version = VER_DEF_CURRENT;
6435 iverdef->vd_flags = 0;
6436 iverdef->vd_ndx = freeidx;
6437 iverdef->vd_cnt = 1;
6439 iverdef->vd_bfd = abfd;
6441 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6442 if (iverdef->vd_nodename == NULL)
6444 iverdef->vd_nextdef = NULL;
6445 amt = (bfd_size_type) sizeof (Elf_Internal_Verdaux);
6446 iverdef->vd_auxptr = bfd_alloc (abfd, amt);
6448 iverdaux = iverdef->vd_auxptr;
6449 iverdaux->vda_nodename = iverdef->vd_nodename;
6450 iverdaux->vda_nextptr = NULL;
6456 if (contents != NULL)
6462 _bfd_elf_make_empty_symbol (bfd *abfd)
6464 elf_symbol_type *newsym;
6465 bfd_size_type amt = sizeof (elf_symbol_type);
6467 newsym = bfd_zalloc (abfd, amt);
6472 newsym->symbol.the_bfd = abfd;
6473 return &newsym->symbol;
6478 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
6482 bfd_symbol_info (symbol, ret);
6485 /* Return whether a symbol name implies a local symbol. Most targets
6486 use this function for the is_local_label_name entry point, but some
6490 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
6493 /* Normal local symbols start with ``.L''. */
6494 if (name[0] == '.' && name[1] == 'L')
6497 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6498 DWARF debugging symbols starting with ``..''. */
6499 if (name[0] == '.' && name[1] == '.')
6502 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6503 emitting DWARF debugging output. I suspect this is actually a
6504 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6505 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6506 underscore to be emitted on some ELF targets). For ease of use,
6507 we treat such symbols as local. */
6508 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6515 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6516 asymbol *symbol ATTRIBUTE_UNUSED)
6523 _bfd_elf_set_arch_mach (bfd *abfd,
6524 enum bfd_architecture arch,
6525 unsigned long machine)
6527 /* If this isn't the right architecture for this backend, and this
6528 isn't the generic backend, fail. */
6529 if (arch != get_elf_backend_data (abfd)->arch
6530 && arch != bfd_arch_unknown
6531 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6534 return bfd_default_set_arch_mach (abfd, arch, machine);
6537 /* Find the function to a particular section and offset,
6538 for error reporting. */
6541 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6545 const char **filename_ptr,
6546 const char **functionname_ptr)
6548 const char *filename;
6549 asymbol *func, *file;
6552 /* ??? Given multiple file symbols, it is impossible to reliably
6553 choose the right file name for global symbols. File symbols are
6554 local symbols, and thus all file symbols must sort before any
6555 global symbols. The ELF spec may be interpreted to say that a
6556 file symbol must sort before other local symbols, but currently
6557 ld -r doesn't do this. So, for ld -r output, it is possible to
6558 make a better choice of file name for local symbols by ignoring
6559 file symbols appearing after a given local symbol. */
6560 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
6566 state = nothing_seen;
6568 for (p = symbols; *p != NULL; p++)
6572 q = (elf_symbol_type *) *p;
6574 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6580 if (state == symbol_seen)
6581 state = file_after_symbol_seen;
6587 if (bfd_get_section (&q->symbol) == section
6588 && q->symbol.value >= low_func
6589 && q->symbol.value <= offset)
6591 func = (asymbol *) q;
6592 low_func = q->symbol.value;
6595 else if (ELF_ST_BIND (q->internal_elf_sym.st_info) != STB_LOCAL
6596 && state == file_after_symbol_seen)
6599 filename = bfd_asymbol_name (file);
6603 if (state == nothing_seen)
6604 state = symbol_seen;
6611 *filename_ptr = filename;
6612 if (functionname_ptr)
6613 *functionname_ptr = bfd_asymbol_name (func);
6618 /* Find the nearest line to a particular section and offset,
6619 for error reporting. */
6622 _bfd_elf_find_nearest_line (bfd *abfd,
6626 const char **filename_ptr,
6627 const char **functionname_ptr,
6628 unsigned int *line_ptr)
6632 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6633 filename_ptr, functionname_ptr,
6636 if (!*functionname_ptr)
6637 elf_find_function (abfd, section, symbols, offset,
6638 *filename_ptr ? NULL : filename_ptr,
6644 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6645 filename_ptr, functionname_ptr,
6647 &elf_tdata (abfd)->dwarf2_find_line_info))
6649 if (!*functionname_ptr)
6650 elf_find_function (abfd, section, symbols, offset,
6651 *filename_ptr ? NULL : filename_ptr,
6657 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6658 &found, filename_ptr,
6659 functionname_ptr, line_ptr,
6660 &elf_tdata (abfd)->line_info))
6662 if (found && (*functionname_ptr || *line_ptr))
6665 if (symbols == NULL)
6668 if (! elf_find_function (abfd, section, symbols, offset,
6669 filename_ptr, functionname_ptr))
6677 _bfd_elf_sizeof_headers (bfd *abfd, bfd_boolean reloc)
6681 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
6683 ret += get_program_header_size (abfd);
6688 _bfd_elf_set_section_contents (bfd *abfd,
6690 const void *location,
6692 bfd_size_type count)
6694 Elf_Internal_Shdr *hdr;
6697 if (! abfd->output_has_begun
6698 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6701 hdr = &elf_section_data (section)->this_hdr;
6702 pos = hdr->sh_offset + offset;
6703 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6704 || bfd_bwrite (location, count, abfd) != count)
6711 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
6712 arelent *cache_ptr ATTRIBUTE_UNUSED,
6713 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
6718 /* Try to convert a non-ELF reloc into an ELF one. */
6721 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
6723 /* Check whether we really have an ELF howto. */
6725 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6727 bfd_reloc_code_real_type code;
6728 reloc_howto_type *howto;
6730 /* Alien reloc: Try to determine its type to replace it with an
6731 equivalent ELF reloc. */
6733 if (areloc->howto->pc_relative)
6735 switch (areloc->howto->bitsize)
6738 code = BFD_RELOC_8_PCREL;
6741 code = BFD_RELOC_12_PCREL;
6744 code = BFD_RELOC_16_PCREL;
6747 code = BFD_RELOC_24_PCREL;
6750 code = BFD_RELOC_32_PCREL;
6753 code = BFD_RELOC_64_PCREL;
6759 howto = bfd_reloc_type_lookup (abfd, code);
6761 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6763 if (howto->pcrel_offset)
6764 areloc->addend += areloc->address;
6766 areloc->addend -= areloc->address; /* addend is unsigned!! */
6771 switch (areloc->howto->bitsize)
6777 code = BFD_RELOC_14;
6780 code = BFD_RELOC_16;
6783 code = BFD_RELOC_26;
6786 code = BFD_RELOC_32;
6789 code = BFD_RELOC_64;
6795 howto = bfd_reloc_type_lookup (abfd, code);
6799 areloc->howto = howto;
6807 (*_bfd_error_handler)
6808 (_("%B: unsupported relocation type %s"),
6809 abfd, areloc->howto->name);
6810 bfd_set_error (bfd_error_bad_value);
6815 _bfd_elf_close_and_cleanup (bfd *abfd)
6817 if (bfd_get_format (abfd) == bfd_object)
6819 if (elf_shstrtab (abfd) != NULL)
6820 _bfd_elf_strtab_free (elf_shstrtab (abfd));
6821 _bfd_dwarf2_cleanup_debug_info (abfd);
6824 return _bfd_generic_close_and_cleanup (abfd);
6827 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6828 in the relocation's offset. Thus we cannot allow any sort of sanity
6829 range-checking to interfere. There is nothing else to do in processing
6832 bfd_reloc_status_type
6833 _bfd_elf_rel_vtable_reloc_fn
6834 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
6835 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
6836 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
6837 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
6839 return bfd_reloc_ok;
6842 /* Elf core file support. Much of this only works on native
6843 toolchains, since we rely on knowing the
6844 machine-dependent procfs structure in order to pick
6845 out details about the corefile. */
6847 #ifdef HAVE_SYS_PROCFS_H
6848 # include <sys/procfs.h>
6851 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6854 elfcore_make_pid (bfd *abfd)
6856 return ((elf_tdata (abfd)->core_lwpid << 16)
6857 + (elf_tdata (abfd)->core_pid));
6860 /* If there isn't a section called NAME, make one, using
6861 data from SECT. Note, this function will generate a
6862 reference to NAME, so you shouldn't deallocate or
6866 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
6870 if (bfd_get_section_by_name (abfd, name) != NULL)
6873 sect2 = bfd_make_section (abfd, name);
6877 sect2->size = sect->size;
6878 sect2->filepos = sect->filepos;
6879 sect2->flags = sect->flags;
6880 sect2->alignment_power = sect->alignment_power;
6884 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6885 actually creates up to two pseudosections:
6886 - For the single-threaded case, a section named NAME, unless
6887 such a section already exists.
6888 - For the multi-threaded case, a section named "NAME/PID", where
6889 PID is elfcore_make_pid (abfd).
6890 Both pseudosections have identical contents. */
6892 _bfd_elfcore_make_pseudosection (bfd *abfd,
6898 char *threaded_name;
6902 /* Build the section name. */
6904 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
6905 len = strlen (buf) + 1;
6906 threaded_name = bfd_alloc (abfd, len);
6907 if (threaded_name == NULL)
6909 memcpy (threaded_name, buf, len);
6911 sect = bfd_make_section_anyway (abfd, threaded_name);
6915 sect->filepos = filepos;
6916 sect->flags = SEC_HAS_CONTENTS;
6917 sect->alignment_power = 2;
6919 return elfcore_maybe_make_sect (abfd, name, sect);
6922 /* prstatus_t exists on:
6924 linux 2.[01] + glibc
6928 #if defined (HAVE_PRSTATUS_T)
6931 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
6936 if (note->descsz == sizeof (prstatus_t))
6940 size = sizeof (prstat.pr_reg);
6941 offset = offsetof (prstatus_t, pr_reg);
6942 memcpy (&prstat, note->descdata, sizeof (prstat));
6944 /* Do not overwrite the core signal if it
6945 has already been set by another thread. */
6946 if (elf_tdata (abfd)->core_signal == 0)
6947 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6948 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6950 /* pr_who exists on:
6953 pr_who doesn't exist on:
6956 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6957 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6960 #if defined (HAVE_PRSTATUS32_T)
6961 else if (note->descsz == sizeof (prstatus32_t))
6963 /* 64-bit host, 32-bit corefile */
6964 prstatus32_t prstat;
6966 size = sizeof (prstat.pr_reg);
6967 offset = offsetof (prstatus32_t, pr_reg);
6968 memcpy (&prstat, note->descdata, sizeof (prstat));
6970 /* Do not overwrite the core signal if it
6971 has already been set by another thread. */
6972 if (elf_tdata (abfd)->core_signal == 0)
6973 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6974 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6976 /* pr_who exists on:
6979 pr_who doesn't exist on:
6982 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6983 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6986 #endif /* HAVE_PRSTATUS32_T */
6989 /* Fail - we don't know how to handle any other
6990 note size (ie. data object type). */
6994 /* Make a ".reg/999" section and a ".reg" section. */
6995 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
6996 size, note->descpos + offset);
6998 #endif /* defined (HAVE_PRSTATUS_T) */
7000 /* Create a pseudosection containing the exact contents of NOTE. */
7002 elfcore_make_note_pseudosection (bfd *abfd,
7004 Elf_Internal_Note *note)
7006 return _bfd_elfcore_make_pseudosection (abfd, name,
7007 note->descsz, note->descpos);
7010 /* There isn't a consistent prfpregset_t across platforms,
7011 but it doesn't matter, because we don't have to pick this
7012 data structure apart. */
7015 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7017 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7020 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7021 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7025 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7027 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7030 #if defined (HAVE_PRPSINFO_T)
7031 typedef prpsinfo_t elfcore_psinfo_t;
7032 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7033 typedef prpsinfo32_t elfcore_psinfo32_t;
7037 #if defined (HAVE_PSINFO_T)
7038 typedef psinfo_t elfcore_psinfo_t;
7039 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7040 typedef psinfo32_t elfcore_psinfo32_t;
7044 /* return a malloc'ed copy of a string at START which is at
7045 most MAX bytes long, possibly without a terminating '\0'.
7046 the copy will always have a terminating '\0'. */
7049 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7052 char *end = memchr (start, '\0', max);
7060 dups = bfd_alloc (abfd, len + 1);
7064 memcpy (dups, start, len);
7070 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7072 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7074 if (note->descsz == sizeof (elfcore_psinfo_t))
7076 elfcore_psinfo_t psinfo;
7078 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7080 elf_tdata (abfd)->core_program
7081 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7082 sizeof (psinfo.pr_fname));
7084 elf_tdata (abfd)->core_command
7085 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7086 sizeof (psinfo.pr_psargs));
7088 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7089 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7091 /* 64-bit host, 32-bit corefile */
7092 elfcore_psinfo32_t psinfo;
7094 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7096 elf_tdata (abfd)->core_program
7097 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7098 sizeof (psinfo.pr_fname));
7100 elf_tdata (abfd)->core_command
7101 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7102 sizeof (psinfo.pr_psargs));
7108 /* Fail - we don't know how to handle any other
7109 note size (ie. data object type). */
7113 /* Note that for some reason, a spurious space is tacked
7114 onto the end of the args in some (at least one anyway)
7115 implementations, so strip it off if it exists. */
7118 char *command = elf_tdata (abfd)->core_command;
7119 int n = strlen (command);
7121 if (0 < n && command[n - 1] == ' ')
7122 command[n - 1] = '\0';
7127 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7129 #if defined (HAVE_PSTATUS_T)
7131 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7133 if (note->descsz == sizeof (pstatus_t)
7134 #if defined (HAVE_PXSTATUS_T)
7135 || note->descsz == sizeof (pxstatus_t)
7141 memcpy (&pstat, note->descdata, sizeof (pstat));
7143 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7145 #if defined (HAVE_PSTATUS32_T)
7146 else if (note->descsz == sizeof (pstatus32_t))
7148 /* 64-bit host, 32-bit corefile */
7151 memcpy (&pstat, note->descdata, sizeof (pstat));
7153 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7156 /* Could grab some more details from the "representative"
7157 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7158 NT_LWPSTATUS note, presumably. */
7162 #endif /* defined (HAVE_PSTATUS_T) */
7164 #if defined (HAVE_LWPSTATUS_T)
7166 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7168 lwpstatus_t lwpstat;
7174 if (note->descsz != sizeof (lwpstat)
7175 #if defined (HAVE_LWPXSTATUS_T)
7176 && note->descsz != sizeof (lwpxstatus_t)
7181 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7183 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7184 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7186 /* Make a ".reg/999" section. */
7188 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7189 len = strlen (buf) + 1;
7190 name = bfd_alloc (abfd, len);
7193 memcpy (name, buf, len);
7195 sect = bfd_make_section_anyway (abfd, name);
7199 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7200 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7201 sect->filepos = note->descpos
7202 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7205 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7206 sect->size = sizeof (lwpstat.pr_reg);
7207 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7210 sect->flags = SEC_HAS_CONTENTS;
7211 sect->alignment_power = 2;
7213 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7216 /* Make a ".reg2/999" section */
7218 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7219 len = strlen (buf) + 1;
7220 name = bfd_alloc (abfd, len);
7223 memcpy (name, buf, len);
7225 sect = bfd_make_section_anyway (abfd, name);
7229 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7230 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7231 sect->filepos = note->descpos
7232 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7235 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7236 sect->size = sizeof (lwpstat.pr_fpreg);
7237 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7240 sect->flags = SEC_HAS_CONTENTS;
7241 sect->alignment_power = 2;
7243 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7245 #endif /* defined (HAVE_LWPSTATUS_T) */
7247 #if defined (HAVE_WIN32_PSTATUS_T)
7249 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7255 win32_pstatus_t pstatus;
7257 if (note->descsz < sizeof (pstatus))
7260 memcpy (&pstatus, note->descdata, sizeof (pstatus));
7262 switch (pstatus.data_type)
7264 case NOTE_INFO_PROCESS:
7265 /* FIXME: need to add ->core_command. */
7266 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
7267 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
7270 case NOTE_INFO_THREAD:
7271 /* Make a ".reg/999" section. */
7272 sprintf (buf, ".reg/%ld", (long) pstatus.data.thread_info.tid);
7274 len = strlen (buf) + 1;
7275 name = bfd_alloc (abfd, len);
7279 memcpy (name, buf, len);
7281 sect = bfd_make_section_anyway (abfd, name);
7285 sect->size = sizeof (pstatus.data.thread_info.thread_context);
7286 sect->filepos = (note->descpos
7287 + offsetof (struct win32_pstatus,
7288 data.thread_info.thread_context));
7289 sect->flags = SEC_HAS_CONTENTS;
7290 sect->alignment_power = 2;
7292 if (pstatus.data.thread_info.is_active_thread)
7293 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7297 case NOTE_INFO_MODULE:
7298 /* Make a ".module/xxxxxxxx" section. */
7299 sprintf (buf, ".module/%08lx",
7300 (long) pstatus.data.module_info.base_address);
7302 len = strlen (buf) + 1;
7303 name = bfd_alloc (abfd, len);
7307 memcpy (name, buf, len);
7309 sect = bfd_make_section_anyway (abfd, name);
7314 sect->size = note->descsz;
7315 sect->filepos = note->descpos;
7316 sect->flags = SEC_HAS_CONTENTS;
7317 sect->alignment_power = 2;
7326 #endif /* HAVE_WIN32_PSTATUS_T */
7329 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7331 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7339 if (bed->elf_backend_grok_prstatus)
7340 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7342 #if defined (HAVE_PRSTATUS_T)
7343 return elfcore_grok_prstatus (abfd, note);
7348 #if defined (HAVE_PSTATUS_T)
7350 return elfcore_grok_pstatus (abfd, note);
7353 #if defined (HAVE_LWPSTATUS_T)
7355 return elfcore_grok_lwpstatus (abfd, note);
7358 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7359 return elfcore_grok_prfpreg (abfd, note);
7361 #if defined (HAVE_WIN32_PSTATUS_T)
7362 case NT_WIN32PSTATUS:
7363 return elfcore_grok_win32pstatus (abfd, note);
7366 case NT_PRXFPREG: /* Linux SSE extension */
7367 if (note->namesz == 6
7368 && strcmp (note->namedata, "LINUX") == 0)
7369 return elfcore_grok_prxfpreg (abfd, note);
7375 if (bed->elf_backend_grok_psinfo)
7376 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7378 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7379 return elfcore_grok_psinfo (abfd, note);
7386 asection *sect = bfd_make_section_anyway (abfd, ".auxv");
7390 sect->size = note->descsz;
7391 sect->filepos = note->descpos;
7392 sect->flags = SEC_HAS_CONTENTS;
7393 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7401 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
7405 cp = strchr (note->namedata, '@');
7408 *lwpidp = atoi(cp + 1);
7415 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
7418 /* Signal number at offset 0x08. */
7419 elf_tdata (abfd)->core_signal
7420 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7422 /* Process ID at offset 0x50. */
7423 elf_tdata (abfd)->core_pid
7424 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7426 /* Command name at 0x7c (max 32 bytes, including nul). */
7427 elf_tdata (abfd)->core_command
7428 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
7430 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
7435 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
7439 if (elfcore_netbsd_get_lwpid (note, &lwp))
7440 elf_tdata (abfd)->core_lwpid = lwp;
7442 if (note->type == NT_NETBSDCORE_PROCINFO)
7444 /* NetBSD-specific core "procinfo". Note that we expect to
7445 find this note before any of the others, which is fine,
7446 since the kernel writes this note out first when it
7447 creates a core file. */
7449 return elfcore_grok_netbsd_procinfo (abfd, note);
7452 /* As of Jan 2002 there are no other machine-independent notes
7453 defined for NetBSD core files. If the note type is less
7454 than the start of the machine-dependent note types, we don't
7457 if (note->type < NT_NETBSDCORE_FIRSTMACH)
7461 switch (bfd_get_arch (abfd))
7463 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7464 PT_GETFPREGS == mach+2. */
7466 case bfd_arch_alpha:
7467 case bfd_arch_sparc:
7470 case NT_NETBSDCORE_FIRSTMACH+0:
7471 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7473 case NT_NETBSDCORE_FIRSTMACH+2:
7474 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7480 /* On all other arch's, PT_GETREGS == mach+1 and
7481 PT_GETFPREGS == mach+3. */
7486 case NT_NETBSDCORE_FIRSTMACH+1:
7487 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7489 case NT_NETBSDCORE_FIRSTMACH+3:
7490 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7500 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, pid_t *tid)
7502 void *ddata = note->descdata;
7509 /* nto_procfs_status 'pid' field is at offset 0. */
7510 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
7512 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7513 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
7515 /* nto_procfs_status 'flags' field is at offset 8. */
7516 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
7518 /* nto_procfs_status 'what' field is at offset 14. */
7519 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
7521 elf_tdata (abfd)->core_signal = sig;
7522 elf_tdata (abfd)->core_lwpid = *tid;
7525 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7526 do not come from signals so we make sure we set the current
7527 thread just in case. */
7528 if (flags & 0x00000080)
7529 elf_tdata (abfd)->core_lwpid = *tid;
7531 /* Make a ".qnx_core_status/%d" section. */
7532 sprintf (buf, ".qnx_core_status/%ld", (long) *tid);
7534 name = bfd_alloc (abfd, strlen (buf) + 1);
7539 sect = bfd_make_section_anyway (abfd, name);
7543 sect->size = note->descsz;
7544 sect->filepos = note->descpos;
7545 sect->flags = SEC_HAS_CONTENTS;
7546 sect->alignment_power = 2;
7548 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7552 elfcore_grok_nto_regs (bfd *abfd,
7553 Elf_Internal_Note *note,
7561 /* Make a "(base)/%d" section. */
7562 sprintf (buf, "%s/%ld", base, (long) tid);
7564 name = bfd_alloc (abfd, strlen (buf) + 1);
7569 sect = bfd_make_section_anyway (abfd, name);
7573 sect->size = note->descsz;
7574 sect->filepos = note->descpos;
7575 sect->flags = SEC_HAS_CONTENTS;
7576 sect->alignment_power = 2;
7578 /* This is the current thread. */
7579 if (elf_tdata (abfd)->core_lwpid == tid)
7580 return elfcore_maybe_make_sect (abfd, base, sect);
7585 #define BFD_QNT_CORE_INFO 7
7586 #define BFD_QNT_CORE_STATUS 8
7587 #define BFD_QNT_CORE_GREG 9
7588 #define BFD_QNT_CORE_FPREG 10
7591 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
7593 /* Every GREG section has a STATUS section before it. Store the
7594 tid from the previous call to pass down to the next gregs
7596 static pid_t tid = 1;
7600 case BFD_QNT_CORE_INFO:
7601 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7602 case BFD_QNT_CORE_STATUS:
7603 return elfcore_grok_nto_status (abfd, note, &tid);
7604 case BFD_QNT_CORE_GREG:
7605 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
7606 case BFD_QNT_CORE_FPREG:
7607 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
7613 /* Function: elfcore_write_note
7620 size of data for note
7623 End of buffer containing note. */
7626 elfcore_write_note (bfd *abfd,
7634 Elf_External_Note *xnp;
7644 const struct elf_backend_data *bed;
7646 namesz = strlen (name) + 1;
7647 bed = get_elf_backend_data (abfd);
7648 pad = -namesz & ((1 << bed->s->log_file_align) - 1);
7651 newspace = 12 + namesz + pad + size;
7653 p = realloc (buf, *bufsiz + newspace);
7655 *bufsiz += newspace;
7656 xnp = (Elf_External_Note *) dest;
7657 H_PUT_32 (abfd, namesz, xnp->namesz);
7658 H_PUT_32 (abfd, size, xnp->descsz);
7659 H_PUT_32 (abfd, type, xnp->type);
7663 memcpy (dest, name, namesz);
7671 memcpy (dest, input, size);
7675 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7677 elfcore_write_prpsinfo (bfd *abfd,
7684 char *note_name = "CORE";
7686 #if defined (HAVE_PSINFO_T)
7688 note_type = NT_PSINFO;
7691 note_type = NT_PRPSINFO;
7694 memset (&data, 0, sizeof (data));
7695 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
7696 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
7697 return elfcore_write_note (abfd, buf, bufsiz,
7698 note_name, note_type, &data, sizeof (data));
7700 #endif /* PSINFO_T or PRPSINFO_T */
7702 #if defined (HAVE_PRSTATUS_T)
7704 elfcore_write_prstatus (bfd *abfd,
7712 char *note_name = "CORE";
7714 memset (&prstat, 0, sizeof (prstat));
7715 prstat.pr_pid = pid;
7716 prstat.pr_cursig = cursig;
7717 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
7718 return elfcore_write_note (abfd, buf, bufsiz,
7719 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
7721 #endif /* HAVE_PRSTATUS_T */
7723 #if defined (HAVE_LWPSTATUS_T)
7725 elfcore_write_lwpstatus (bfd *abfd,
7732 lwpstatus_t lwpstat;
7733 char *note_name = "CORE";
7735 memset (&lwpstat, 0, sizeof (lwpstat));
7736 lwpstat.pr_lwpid = pid >> 16;
7737 lwpstat.pr_cursig = cursig;
7738 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7739 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
7740 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7742 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
7743 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
7745 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
7746 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
7749 return elfcore_write_note (abfd, buf, bufsiz, note_name,
7750 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
7752 #endif /* HAVE_LWPSTATUS_T */
7754 #if defined (HAVE_PSTATUS_T)
7756 elfcore_write_pstatus (bfd *abfd,
7764 char *note_name = "CORE";
7766 memset (&pstat, 0, sizeof (pstat));
7767 pstat.pr_pid = pid & 0xffff;
7768 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
7769 NT_PSTATUS, &pstat, sizeof (pstat));
7772 #endif /* HAVE_PSTATUS_T */
7775 elfcore_write_prfpreg (bfd *abfd,
7781 char *note_name = "CORE";
7782 return elfcore_write_note (abfd, buf, bufsiz,
7783 note_name, NT_FPREGSET, fpregs, size);
7787 elfcore_write_prxfpreg (bfd *abfd,
7790 const void *xfpregs,
7793 char *note_name = "LINUX";
7794 return elfcore_write_note (abfd, buf, bufsiz,
7795 note_name, NT_PRXFPREG, xfpregs, size);
7799 elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
7807 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
7810 buf = bfd_malloc (size);
7814 if (bfd_bread (buf, size, abfd) != size)
7822 while (p < buf + size)
7824 /* FIXME: bad alignment assumption. */
7825 Elf_External_Note *xnp = (Elf_External_Note *) p;
7826 Elf_Internal_Note in;
7828 in.type = H_GET_32 (abfd, xnp->type);
7830 in.namesz = H_GET_32 (abfd, xnp->namesz);
7831 in.namedata = xnp->name;
7833 in.descsz = H_GET_32 (abfd, xnp->descsz);
7834 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7835 in.descpos = offset + (in.descdata - buf);
7837 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7839 if (! elfcore_grok_netbsd_note (abfd, &in))
7842 else if (strncmp (in.namedata, "QNX", 3) == 0)
7844 if (! elfcore_grok_nto_note (abfd, &in))
7849 if (! elfcore_grok_note (abfd, &in))
7853 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7860 /* Providing external access to the ELF program header table. */
7862 /* Return an upper bound on the number of bytes required to store a
7863 copy of ABFD's program header table entries. Return -1 if an error
7864 occurs; bfd_get_error will return an appropriate code. */
7867 bfd_get_elf_phdr_upper_bound (bfd *abfd)
7869 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7871 bfd_set_error (bfd_error_wrong_format);
7875 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
7878 /* Copy ABFD's program header table entries to *PHDRS. The entries
7879 will be stored as an array of Elf_Internal_Phdr structures, as
7880 defined in include/elf/internal.h. To find out how large the
7881 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7883 Return the number of program header table entries read, or -1 if an
7884 error occurs; bfd_get_error will return an appropriate code. */
7887 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
7891 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7893 bfd_set_error (bfd_error_wrong_format);
7897 num_phdrs = elf_elfheader (abfd)->e_phnum;
7898 memcpy (phdrs, elf_tdata (abfd)->phdr,
7899 num_phdrs * sizeof (Elf_Internal_Phdr));
7905 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
7908 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7910 i_ehdrp = elf_elfheader (abfd);
7911 if (i_ehdrp == NULL)
7912 sprintf_vma (buf, value);
7915 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7917 #if BFD_HOST_64BIT_LONG
7918 sprintf (buf, "%016lx", value);
7920 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
7921 _bfd_int64_low (value));
7925 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
7928 sprintf_vma (buf, value);
7933 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
7936 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7938 i_ehdrp = elf_elfheader (abfd);
7939 if (i_ehdrp == NULL)
7940 fprintf_vma ((FILE *) stream, value);
7943 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7945 #if BFD_HOST_64BIT_LONG
7946 fprintf ((FILE *) stream, "%016lx", value);
7948 fprintf ((FILE *) stream, "%08lx%08lx",
7949 _bfd_int64_high (value), _bfd_int64_low (value));
7953 fprintf ((FILE *) stream, "%08lx",
7954 (unsigned long) (value & 0xffffffff));
7957 fprintf_vma ((FILE *) stream, value);
7961 enum elf_reloc_type_class
7962 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
7964 return reloc_class_normal;
7967 /* For RELA architectures, return the relocation value for a
7968 relocation against a local symbol. */
7971 _bfd_elf_rela_local_sym (bfd *abfd,
7972 Elf_Internal_Sym *sym,
7974 Elf_Internal_Rela *rel)
7976 asection *sec = *psec;
7979 relocation = (sec->output_section->vma
7980 + sec->output_offset
7982 if ((sec->flags & SEC_MERGE)
7983 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
7984 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
7987 _bfd_merged_section_offset (abfd, psec,
7988 elf_section_data (sec)->sec_info,
7989 sym->st_value + rel->r_addend);
7992 /* If we have changed the section, and our original section is
7993 marked with SEC_EXCLUDE, it means that the original
7994 SEC_MERGE section has been completely subsumed in some
7995 other SEC_MERGE section. In this case, we need to leave
7996 some info around for --emit-relocs. */
7997 if ((sec->flags & SEC_EXCLUDE) != 0)
7998 sec->kept_section = *psec;
8001 rel->r_addend -= relocation;
8002 rel->r_addend += sec->output_section->vma + sec->output_offset;
8008 _bfd_elf_rel_local_sym (bfd *abfd,
8009 Elf_Internal_Sym *sym,
8013 asection *sec = *psec;
8015 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
8016 return sym->st_value + addend;
8018 return _bfd_merged_section_offset (abfd, psec,
8019 elf_section_data (sec)->sec_info,
8020 sym->st_value + addend);
8024 _bfd_elf_section_offset (bfd *abfd,
8025 struct bfd_link_info *info,
8029 switch (sec->sec_info_type)
8031 case ELF_INFO_TYPE_STABS:
8032 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
8034 case ELF_INFO_TYPE_EH_FRAME:
8035 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
8041 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8042 reconstruct an ELF file by reading the segments out of remote memory
8043 based on the ELF file header at EHDR_VMA and the ELF program headers it
8044 points to. If not null, *LOADBASEP is filled in with the difference
8045 between the VMAs from which the segments were read, and the VMAs the
8046 file headers (and hence BFD's idea of each section's VMA) put them at.
8048 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8049 remote memory at target address VMA into the local buffer at MYADDR; it
8050 should return zero on success or an `errno' code on failure. TEMPL must
8051 be a BFD for an ELF target with the word size and byte order found in
8052 the remote memory. */
8055 bfd_elf_bfd_from_remote_memory
8059 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
8061 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
8062 (templ, ehdr_vma, loadbasep, target_read_memory);
8066 _bfd_elf_get_synthetic_symtab (bfd *abfd,
8067 long symcount ATTRIBUTE_UNUSED,
8068 asymbol **syms ATTRIBUTE_UNUSED,
8073 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8076 const char *relplt_name;
8077 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8081 Elf_Internal_Shdr *hdr;
8087 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
8090 if (dynsymcount <= 0)
8093 if (!bed->plt_sym_val)
8096 relplt_name = bed->relplt_name;
8097 if (relplt_name == NULL)
8098 relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
8099 relplt = bfd_get_section_by_name (abfd, relplt_name);
8103 hdr = &elf_section_data (relplt)->this_hdr;
8104 if (hdr->sh_link != elf_dynsymtab (abfd)
8105 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
8108 plt = bfd_get_section_by_name (abfd, ".plt");
8112 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8113 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
8116 count = relplt->size / hdr->sh_entsize;
8117 size = count * sizeof (asymbol);
8118 p = relplt->relocation;
8119 for (i = 0; i < count; i++, s++, p++)
8120 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
8122 s = *ret = bfd_malloc (size);
8126 names = (char *) (s + count);
8127 p = relplt->relocation;
8129 for (i = 0; i < count; i++, s++, p++)
8134 addr = bed->plt_sym_val (i, plt, p);
8135 if (addr == (bfd_vma) -1)
8138 *s = **p->sym_ptr_ptr;
8140 s->value = addr - plt->vma;
8142 len = strlen ((*p->sym_ptr_ptr)->name);
8143 memcpy (names, (*p->sym_ptr_ptr)->name, len);
8145 memcpy (names, "@plt", sizeof ("@plt"));
8146 names += sizeof ("@plt");
8153 /* Sort symbol by binding and section. We want to put definitions
8154 sorted by section at the beginning. */
8157 elf_sort_elf_symbol (const void *arg1, const void *arg2)
8159 const Elf_Internal_Sym *s1;
8160 const Elf_Internal_Sym *s2;
8163 /* Make sure that undefined symbols are at the end. */
8164 s1 = (const Elf_Internal_Sym *) arg1;
8165 if (s1->st_shndx == SHN_UNDEF)
8167 s2 = (const Elf_Internal_Sym *) arg2;
8168 if (s2->st_shndx == SHN_UNDEF)
8171 /* Sorted by section index. */
8172 shndx = s1->st_shndx - s2->st_shndx;
8176 /* Sorted by binding. */
8177 return ELF_ST_BIND (s1->st_info) - ELF_ST_BIND (s2->st_info);
8182 Elf_Internal_Sym *sym;
8187 elf_sym_name_compare (const void *arg1, const void *arg2)
8189 const struct elf_symbol *s1 = (const struct elf_symbol *) arg1;
8190 const struct elf_symbol *s2 = (const struct elf_symbol *) arg2;
8191 return strcmp (s1->name, s2->name);
8194 /* Check if 2 sections define the same set of local and global
8198 bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2)
8201 const struct elf_backend_data *bed1, *bed2;
8202 Elf_Internal_Shdr *hdr1, *hdr2;
8203 bfd_size_type symcount1, symcount2;
8204 Elf_Internal_Sym *isymbuf1, *isymbuf2;
8205 Elf_Internal_Sym *isymstart1 = NULL, *isymstart2 = NULL, *isym;
8206 Elf_Internal_Sym *isymend;
8207 struct elf_symbol *symp, *symtable1 = NULL, *symtable2 = NULL;
8208 bfd_size_type count1, count2, i;
8215 /* If both are .gnu.linkonce sections, they have to have the same
8217 if (strncmp (sec1->name, ".gnu.linkonce",
8218 sizeof ".gnu.linkonce" - 1) == 0
8219 && strncmp (sec2->name, ".gnu.linkonce",
8220 sizeof ".gnu.linkonce" - 1) == 0)
8221 return strcmp (sec1->name + sizeof ".gnu.linkonce",
8222 sec2->name + sizeof ".gnu.linkonce") == 0;
8224 /* Both sections have to be in ELF. */
8225 if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour
8226 || bfd_get_flavour (bfd2) != bfd_target_elf_flavour)
8229 if (elf_section_type (sec1) != elf_section_type (sec2))
8232 if ((elf_section_flags (sec1) & SHF_GROUP) != 0
8233 && (elf_section_flags (sec2) & SHF_GROUP) != 0)
8235 /* If both are members of section groups, they have to have the
8237 if (strcmp (elf_group_name (sec1), elf_group_name (sec2)) != 0)
8241 shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1);
8242 shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2);
8243 if (shndx1 == -1 || shndx2 == -1)
8246 bed1 = get_elf_backend_data (bfd1);
8247 bed2 = get_elf_backend_data (bfd2);
8248 hdr1 = &elf_tdata (bfd1)->symtab_hdr;
8249 symcount1 = hdr1->sh_size / bed1->s->sizeof_sym;
8250 hdr2 = &elf_tdata (bfd2)->symtab_hdr;
8251 symcount2 = hdr2->sh_size / bed2->s->sizeof_sym;
8253 if (symcount1 == 0 || symcount2 == 0)
8256 isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0,
8258 isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0,
8262 if (isymbuf1 == NULL || isymbuf2 == NULL)
8265 /* Sort symbols by binding and section. Global definitions are at
8267 qsort (isymbuf1, symcount1, sizeof (Elf_Internal_Sym),
8268 elf_sort_elf_symbol);
8269 qsort (isymbuf2, symcount2, sizeof (Elf_Internal_Sym),
8270 elf_sort_elf_symbol);
8272 /* Count definitions in the section. */
8274 for (isym = isymbuf1, isymend = isym + symcount1;
8275 isym < isymend; isym++)
8277 if (isym->st_shndx == (unsigned int) shndx1)
8284 if (count1 && isym->st_shndx != (unsigned int) shndx1)
8289 for (isym = isymbuf2, isymend = isym + symcount2;
8290 isym < isymend; isym++)
8292 if (isym->st_shndx == (unsigned int) shndx2)
8299 if (count2 && isym->st_shndx != (unsigned int) shndx2)
8303 if (count1 == 0 || count2 == 0 || count1 != count2)
8306 symtable1 = bfd_malloc (count1 * sizeof (struct elf_symbol));
8307 symtable2 = bfd_malloc (count1 * sizeof (struct elf_symbol));
8309 if (symtable1 == NULL || symtable2 == NULL)
8313 for (isym = isymstart1, isymend = isym + count1;
8314 isym < isymend; isym++)
8317 symp->name = bfd_elf_string_from_elf_section (bfd1,
8324 for (isym = isymstart2, isymend = isym + count1;
8325 isym < isymend; isym++)
8328 symp->name = bfd_elf_string_from_elf_section (bfd2,
8334 /* Sort symbol by name. */
8335 qsort (symtable1, count1, sizeof (struct elf_symbol),
8336 elf_sym_name_compare);
8337 qsort (symtable2, count1, sizeof (struct elf_symbol),
8338 elf_sym_name_compare);
8340 for (i = 0; i < count1; i++)
8341 /* Two symbols must have the same binding, type and name. */
8342 if (symtable1 [i].sym->st_info != symtable2 [i].sym->st_info
8343 || symtable1 [i].sym->st_other != symtable2 [i].sym->st_other
8344 || strcmp (symtable1 [i].name, symtable2 [i].name) != 0)