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;
459 /* If this section is linked to by other sections then it is a symbol or
460 string section which is masquerading as a group. This is a bad thing,
461 and if we carry on to the call to bfd_section_from_shdr below we will
462 enter an infinite loop. So check now and break out if we detect this
464 http://sources.redhat.com/ml/binutils/2005-05/msg00421.html
465 for a report of a case that tirggers this code. */
466 for (i = elf_numsections (abfd); i--;)
467 if (elf_elfsections (abfd) [elf_elfsections (abfd) [i]->sh_link] == ghdr)
470 /* Next we need to ensure the symbol table is available. */
471 if (! bfd_section_from_shdr (abfd, ghdr->sh_link))
474 /* Go read the symbol. */
475 hdr = &elf_tdata (abfd)->symtab_hdr;
476 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
477 &isym, esym, &eshndx) == NULL)
480 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
483 /* Set next_in_group list pointer, and group name for NEWSECT. */
486 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
488 unsigned int num_group = elf_tdata (abfd)->num_group;
490 /* If num_group is zero, read in all SHT_GROUP sections. The count
491 is set to -1 if there are no SHT_GROUP sections. */
494 unsigned int i, shnum;
496 /* First count the number of groups. If we have a SHT_GROUP
497 section with just a flag word (ie. sh_size is 4), ignore it. */
498 shnum = elf_numsections (abfd);
500 for (i = 0; i < shnum; i++)
502 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
503 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
509 num_group = (unsigned) -1;
510 elf_tdata (abfd)->num_group = num_group;
514 /* We keep a list of elf section headers for group sections,
515 so we can find them quickly. */
518 elf_tdata (abfd)->num_group = num_group;
519 amt = num_group * sizeof (Elf_Internal_Shdr *);
520 elf_tdata (abfd)->group_sect_ptr = bfd_alloc (abfd, amt);
521 if (elf_tdata (abfd)->group_sect_ptr == NULL)
525 for (i = 0; i < shnum; i++)
527 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
528 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
531 Elf_Internal_Group *dest;
533 /* Add to list of sections. */
534 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
537 /* Read the raw contents. */
538 BFD_ASSERT (sizeof (*dest) >= 4);
539 amt = shdr->sh_size * sizeof (*dest) / 4;
540 shdr->contents = bfd_alloc (abfd, amt);
541 if (shdr->contents == NULL
542 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
543 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
547 /* Translate raw contents, a flag word followed by an
548 array of elf section indices all in target byte order,
549 to the flag word followed by an array of elf section
551 src = shdr->contents + shdr->sh_size;
552 dest = (Elf_Internal_Group *) (shdr->contents + amt);
559 idx = H_GET_32 (abfd, src);
560 if (src == shdr->contents)
563 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
564 shdr->bfd_section->flags
565 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
570 ((*_bfd_error_handler)
571 (_("%B: invalid SHT_GROUP entry"), abfd));
574 dest->shdr = elf_elfsections (abfd)[idx];
581 if (num_group != (unsigned) -1)
585 for (i = 0; i < num_group; i++)
587 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
588 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
589 unsigned int n_elt = shdr->sh_size / 4;
591 /* Look through this group's sections to see if current
592 section is a member. */
594 if ((++idx)->shdr == hdr)
598 /* We are a member of this group. Go looking through
599 other members to see if any others are linked via
601 idx = (Elf_Internal_Group *) shdr->contents;
602 n_elt = shdr->sh_size / 4;
604 if ((s = (++idx)->shdr->bfd_section) != NULL
605 && elf_next_in_group (s) != NULL)
609 /* Snarf the group name from other member, and
610 insert current section in circular list. */
611 elf_group_name (newsect) = elf_group_name (s);
612 elf_next_in_group (newsect) = elf_next_in_group (s);
613 elf_next_in_group (s) = newsect;
619 gname = group_signature (abfd, shdr);
622 elf_group_name (newsect) = gname;
624 /* Start a circular list with one element. */
625 elf_next_in_group (newsect) = newsect;
628 /* If the group section has been created, point to the
630 if (shdr->bfd_section != NULL)
631 elf_next_in_group (shdr->bfd_section) = newsect;
639 if (elf_group_name (newsect) == NULL)
641 (*_bfd_error_handler) (_("%B: no group info for section %A"),
648 _bfd_elf_setup_group_pointers (bfd *abfd)
651 unsigned int num_group = elf_tdata (abfd)->num_group;
652 bfd_boolean result = TRUE;
654 if (num_group == (unsigned) -1)
657 for (i = 0; i < num_group; i++)
659 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
660 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
661 unsigned int n_elt = shdr->sh_size / 4;
664 if ((++idx)->shdr->bfd_section)
665 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
666 else if (idx->shdr->sh_type == SHT_RELA
667 || idx->shdr->sh_type == SHT_REL)
668 /* We won't include relocation sections in section groups in
669 output object files. We adjust the group section size here
670 so that relocatable link will work correctly when
671 relocation sections are in section group in input object
673 shdr->bfd_section->size -= 4;
676 /* There are some unknown sections in the group. */
677 (*_bfd_error_handler)
678 (_("%B: unknown [%d] section `%s' in group [%s]"),
680 (unsigned int) idx->shdr->sh_type,
681 bfd_elf_string_from_elf_section (abfd,
682 (elf_elfheader (abfd)
685 shdr->bfd_section->name);
693 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
695 return elf_next_in_group (sec) != NULL;
698 /* Make a BFD section from an ELF section. We store a pointer to the
699 BFD section in the bfd_section field of the header. */
702 _bfd_elf_make_section_from_shdr (bfd *abfd,
703 Elf_Internal_Shdr *hdr,
709 const struct elf_backend_data *bed;
711 if (hdr->bfd_section != NULL)
713 BFD_ASSERT (strcmp (name,
714 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
718 newsect = bfd_make_section_anyway (abfd, name);
722 hdr->bfd_section = newsect;
723 elf_section_data (newsect)->this_hdr = *hdr;
724 elf_section_data (newsect)->this_idx = shindex;
726 /* Always use the real type/flags. */
727 elf_section_type (newsect) = hdr->sh_type;
728 elf_section_flags (newsect) = hdr->sh_flags;
730 newsect->filepos = hdr->sh_offset;
732 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
733 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
734 || ! bfd_set_section_alignment (abfd, newsect,
735 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
738 flags = SEC_NO_FLAGS;
739 if (hdr->sh_type != SHT_NOBITS)
740 flags |= SEC_HAS_CONTENTS;
741 if (hdr->sh_type == SHT_GROUP)
742 flags |= SEC_GROUP | SEC_EXCLUDE;
743 if ((hdr->sh_flags & SHF_ALLOC) != 0)
746 if (hdr->sh_type != SHT_NOBITS)
749 if ((hdr->sh_flags & SHF_WRITE) == 0)
750 flags |= SEC_READONLY;
751 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
753 else if ((flags & SEC_LOAD) != 0)
755 if ((hdr->sh_flags & SHF_MERGE) != 0)
758 newsect->entsize = hdr->sh_entsize;
759 if ((hdr->sh_flags & SHF_STRINGS) != 0)
760 flags |= SEC_STRINGS;
762 if (hdr->sh_flags & SHF_GROUP)
763 if (!setup_group (abfd, hdr, newsect))
765 if ((hdr->sh_flags & SHF_TLS) != 0)
766 flags |= SEC_THREAD_LOCAL;
768 if ((flags & SEC_ALLOC) == 0)
770 /* The debugging sections appear to be recognized only by name,
771 not any sort of flag. Their SEC_ALLOC bits are cleared. */
776 } debug_sections [] =
778 { "debug", 5 }, /* 'd' */
779 { NULL, 0 }, /* 'e' */
780 { NULL, 0 }, /* 'f' */
781 { "gnu.linkonce.wi.", 17 }, /* 'g' */
782 { NULL, 0 }, /* 'h' */
783 { NULL, 0 }, /* 'i' */
784 { NULL, 0 }, /* 'j' */
785 { NULL, 0 }, /* 'k' */
786 { "line", 4 }, /* 'l' */
787 { NULL, 0 }, /* 'm' */
788 { NULL, 0 }, /* 'n' */
789 { NULL, 0 }, /* 'o' */
790 { NULL, 0 }, /* 'p' */
791 { NULL, 0 }, /* 'q' */
792 { NULL, 0 }, /* 'r' */
793 { "stab", 4 } /* 's' */
798 int i = name [1] - 'd';
800 && i < (int) ARRAY_SIZE (debug_sections)
801 && debug_sections [i].name != NULL
802 && strncmp (&name [1], debug_sections [i].name,
803 debug_sections [i].len) == 0)
804 flags |= SEC_DEBUGGING;
808 /* As a GNU extension, if the name begins with .gnu.linkonce, we
809 only link a single copy of the section. This is used to support
810 g++. g++ will emit each template expansion in its own section.
811 The symbols will be defined as weak, so that multiple definitions
812 are permitted. The GNU linker extension is to actually discard
813 all but one of the sections. */
814 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
815 && elf_next_in_group (newsect) == NULL)
816 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
818 bed = get_elf_backend_data (abfd);
819 if (bed->elf_backend_section_flags)
820 if (! bed->elf_backend_section_flags (&flags, hdr))
823 if (! bfd_set_section_flags (abfd, newsect, flags))
826 if ((flags & SEC_ALLOC) != 0)
828 Elf_Internal_Phdr *phdr;
831 /* Look through the phdrs to see if we need to adjust the lma.
832 If all the p_paddr fields are zero, we ignore them, since
833 some ELF linkers produce such output. */
834 phdr = elf_tdata (abfd)->phdr;
835 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
837 if (phdr->p_paddr != 0)
840 if (i < elf_elfheader (abfd)->e_phnum)
842 phdr = elf_tdata (abfd)->phdr;
843 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
845 /* This section is part of this segment if its file
846 offset plus size lies within the segment's memory
847 span and, if the section is loaded, the extent of the
848 loaded data lies within the extent of the segment.
850 Note - we used to check the p_paddr field as well, and
851 refuse to set the LMA if it was 0. This is wrong
852 though, as a perfectly valid initialised segment can
853 have a p_paddr of zero. Some architectures, eg ARM,
854 place special significance on the address 0 and
855 executables need to be able to have a segment which
856 covers this address. */
857 if (phdr->p_type == PT_LOAD
858 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
859 && (hdr->sh_offset + hdr->sh_size
860 <= phdr->p_offset + phdr->p_memsz)
861 && ((flags & SEC_LOAD) == 0
862 || (hdr->sh_offset + hdr->sh_size
863 <= phdr->p_offset + phdr->p_filesz)))
865 if ((flags & SEC_LOAD) == 0)
866 newsect->lma = (phdr->p_paddr
867 + hdr->sh_addr - phdr->p_vaddr);
869 /* We used to use the same adjustment for SEC_LOAD
870 sections, but that doesn't work if the segment
871 is packed with code from multiple VMAs.
872 Instead we calculate the section LMA based on
873 the segment LMA. It is assumed that the
874 segment will contain sections with contiguous
875 LMAs, even if the VMAs are not. */
876 newsect->lma = (phdr->p_paddr
877 + hdr->sh_offset - phdr->p_offset);
879 /* With contiguous segments, we can't tell from file
880 offsets whether a section with zero size should
881 be placed at the end of one segment or the
882 beginning of the next. Decide based on vaddr. */
883 if (hdr->sh_addr >= phdr->p_vaddr
884 && (hdr->sh_addr + hdr->sh_size
885 <= phdr->p_vaddr + phdr->p_memsz))
900 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
903 Helper functions for GDB to locate the string tables.
904 Since BFD hides string tables from callers, GDB needs to use an
905 internal hook to find them. Sun's .stabstr, in particular,
906 isn't even pointed to by the .stab section, so ordinary
907 mechanisms wouldn't work to find it, even if we had some.
910 struct elf_internal_shdr *
911 bfd_elf_find_section (bfd *abfd, char *name)
913 Elf_Internal_Shdr **i_shdrp;
918 i_shdrp = elf_elfsections (abfd);
921 shstrtab = bfd_elf_get_str_section (abfd,
922 elf_elfheader (abfd)->e_shstrndx);
923 if (shstrtab != NULL)
925 max = elf_numsections (abfd);
926 for (i = 1; i < max; i++)
927 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
934 const char *const bfd_elf_section_type_names[] = {
935 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
936 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
937 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
940 /* ELF relocs are against symbols. If we are producing relocatable
941 output, and the reloc is against an external symbol, and nothing
942 has given us any additional addend, the resulting reloc will also
943 be against the same symbol. In such a case, we don't want to
944 change anything about the way the reloc is handled, since it will
945 all be done at final link time. Rather than put special case code
946 into bfd_perform_relocation, all the reloc types use this howto
947 function. It just short circuits the reloc if producing
948 relocatable output against an external symbol. */
950 bfd_reloc_status_type
951 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
952 arelent *reloc_entry,
954 void *data ATTRIBUTE_UNUSED,
955 asection *input_section,
957 char **error_message ATTRIBUTE_UNUSED)
959 if (output_bfd != NULL
960 && (symbol->flags & BSF_SECTION_SYM) == 0
961 && (! reloc_entry->howto->partial_inplace
962 || reloc_entry->addend == 0))
964 reloc_entry->address += input_section->output_offset;
968 return bfd_reloc_continue;
971 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
974 merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED,
977 BFD_ASSERT (sec->sec_info_type == ELF_INFO_TYPE_MERGE);
978 sec->sec_info_type = ELF_INFO_TYPE_NONE;
981 /* Finish SHF_MERGE section merging. */
984 _bfd_elf_merge_sections (bfd *abfd, struct bfd_link_info *info)
989 if (!is_elf_hash_table (info->hash))
992 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
993 if ((ibfd->flags & DYNAMIC) == 0)
994 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
995 if ((sec->flags & SEC_MERGE) != 0
996 && !bfd_is_abs_section (sec->output_section))
998 struct bfd_elf_section_data *secdata;
1000 secdata = elf_section_data (sec);
1001 if (! _bfd_add_merge_section (abfd,
1002 &elf_hash_table (info)->merge_info,
1003 sec, &secdata->sec_info))
1005 else if (secdata->sec_info)
1006 sec->sec_info_type = ELF_INFO_TYPE_MERGE;
1009 if (elf_hash_table (info)->merge_info != NULL)
1010 _bfd_merge_sections (abfd, info, elf_hash_table (info)->merge_info,
1011 merge_sections_remove_hook);
1016 _bfd_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
1018 sec->output_section = bfd_abs_section_ptr;
1019 sec->output_offset = sec->vma;
1020 if (!is_elf_hash_table (info->hash))
1023 sec->sec_info_type = ELF_INFO_TYPE_JUST_SYMS;
1026 /* Copy the program header and other data from one object module to
1030 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1032 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1033 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1036 BFD_ASSERT (!elf_flags_init (obfd)
1037 || (elf_elfheader (obfd)->e_flags
1038 == elf_elfheader (ibfd)->e_flags));
1040 elf_gp (obfd) = elf_gp (ibfd);
1041 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1042 elf_flags_init (obfd) = TRUE;
1046 /* Print out the program headers. */
1049 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1052 Elf_Internal_Phdr *p;
1054 bfd_byte *dynbuf = NULL;
1056 p = elf_tdata (abfd)->phdr;
1061 fprintf (f, _("\nProgram Header:\n"));
1062 c = elf_elfheader (abfd)->e_phnum;
1063 for (i = 0; i < c; i++, p++)
1070 case PT_NULL: pt = "NULL"; break;
1071 case PT_LOAD: pt = "LOAD"; break;
1072 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1073 case PT_INTERP: pt = "INTERP"; break;
1074 case PT_NOTE: pt = "NOTE"; break;
1075 case PT_SHLIB: pt = "SHLIB"; break;
1076 case PT_PHDR: pt = "PHDR"; break;
1077 case PT_TLS: pt = "TLS"; break;
1078 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1079 case PT_GNU_STACK: pt = "STACK"; break;
1080 case PT_GNU_RELRO: pt = "RELRO"; break;
1081 default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
1083 fprintf (f, "%8s off 0x", pt);
1084 bfd_fprintf_vma (abfd, f, p->p_offset);
1085 fprintf (f, " vaddr 0x");
1086 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1087 fprintf (f, " paddr 0x");
1088 bfd_fprintf_vma (abfd, f, p->p_paddr);
1089 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1090 fprintf (f, " filesz 0x");
1091 bfd_fprintf_vma (abfd, f, p->p_filesz);
1092 fprintf (f, " memsz 0x");
1093 bfd_fprintf_vma (abfd, f, p->p_memsz);
1094 fprintf (f, " flags %c%c%c",
1095 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1096 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1097 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1098 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1099 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1104 s = bfd_get_section_by_name (abfd, ".dynamic");
1108 unsigned long shlink;
1109 bfd_byte *extdyn, *extdynend;
1111 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1113 fprintf (f, _("\nDynamic Section:\n"));
1115 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1118 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1121 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1123 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1124 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1127 extdynend = extdyn + s->size;
1128 for (; extdyn < extdynend; extdyn += extdynsize)
1130 Elf_Internal_Dyn dyn;
1133 bfd_boolean stringp;
1135 (*swap_dyn_in) (abfd, extdyn, &dyn);
1137 if (dyn.d_tag == DT_NULL)
1144 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1148 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1149 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1150 case DT_PLTGOT: name = "PLTGOT"; break;
1151 case DT_HASH: name = "HASH"; break;
1152 case DT_STRTAB: name = "STRTAB"; break;
1153 case DT_SYMTAB: name = "SYMTAB"; break;
1154 case DT_RELA: name = "RELA"; break;
1155 case DT_RELASZ: name = "RELASZ"; break;
1156 case DT_RELAENT: name = "RELAENT"; break;
1157 case DT_STRSZ: name = "STRSZ"; break;
1158 case DT_SYMENT: name = "SYMENT"; break;
1159 case DT_INIT: name = "INIT"; break;
1160 case DT_FINI: name = "FINI"; break;
1161 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1162 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1163 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1164 case DT_REL: name = "REL"; break;
1165 case DT_RELSZ: name = "RELSZ"; break;
1166 case DT_RELENT: name = "RELENT"; break;
1167 case DT_PLTREL: name = "PLTREL"; break;
1168 case DT_DEBUG: name = "DEBUG"; break;
1169 case DT_TEXTREL: name = "TEXTREL"; break;
1170 case DT_JMPREL: name = "JMPREL"; break;
1171 case DT_BIND_NOW: name = "BIND_NOW"; break;
1172 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1173 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1174 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1175 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1176 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1177 case DT_FLAGS: name = "FLAGS"; break;
1178 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1179 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1180 case DT_CHECKSUM: name = "CHECKSUM"; break;
1181 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1182 case DT_MOVEENT: name = "MOVEENT"; break;
1183 case DT_MOVESZ: name = "MOVESZ"; break;
1184 case DT_FEATURE: name = "FEATURE"; break;
1185 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1186 case DT_SYMINSZ: name = "SYMINSZ"; break;
1187 case DT_SYMINENT: name = "SYMINENT"; break;
1188 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1189 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1190 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1191 case DT_PLTPAD: name = "PLTPAD"; break;
1192 case DT_MOVETAB: name = "MOVETAB"; break;
1193 case DT_SYMINFO: name = "SYMINFO"; break;
1194 case DT_RELACOUNT: name = "RELACOUNT"; break;
1195 case DT_RELCOUNT: name = "RELCOUNT"; break;
1196 case DT_FLAGS_1: name = "FLAGS_1"; break;
1197 case DT_VERSYM: name = "VERSYM"; break;
1198 case DT_VERDEF: name = "VERDEF"; break;
1199 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1200 case DT_VERNEED: name = "VERNEED"; break;
1201 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1202 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1203 case DT_USED: name = "USED"; break;
1204 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1207 fprintf (f, " %-11s ", name);
1209 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1213 unsigned int tagv = dyn.d_un.d_val;
1215 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1218 fprintf (f, "%s", string);
1227 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1228 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1230 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1234 if (elf_dynverdef (abfd) != 0)
1236 Elf_Internal_Verdef *t;
1238 fprintf (f, _("\nVersion definitions:\n"));
1239 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1241 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1242 t->vd_flags, t->vd_hash, t->vd_nodename);
1243 if (t->vd_auxptr->vda_nextptr != NULL)
1245 Elf_Internal_Verdaux *a;
1248 for (a = t->vd_auxptr->vda_nextptr;
1251 fprintf (f, "%s ", a->vda_nodename);
1257 if (elf_dynverref (abfd) != 0)
1259 Elf_Internal_Verneed *t;
1261 fprintf (f, _("\nVersion References:\n"));
1262 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1264 Elf_Internal_Vernaux *a;
1266 fprintf (f, _(" required from %s:\n"), t->vn_filename);
1267 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1268 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1269 a->vna_flags, a->vna_other, a->vna_nodename);
1281 /* Display ELF-specific fields of a symbol. */
1284 bfd_elf_print_symbol (bfd *abfd,
1287 bfd_print_symbol_type how)
1292 case bfd_print_symbol_name:
1293 fprintf (file, "%s", symbol->name);
1295 case bfd_print_symbol_more:
1296 fprintf (file, "elf ");
1297 bfd_fprintf_vma (abfd, file, symbol->value);
1298 fprintf (file, " %lx", (long) symbol->flags);
1300 case bfd_print_symbol_all:
1302 const char *section_name;
1303 const char *name = NULL;
1304 const struct elf_backend_data *bed;
1305 unsigned char st_other;
1308 section_name = symbol->section ? symbol->section->name : "(*none*)";
1310 bed = get_elf_backend_data (abfd);
1311 if (bed->elf_backend_print_symbol_all)
1312 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1316 name = symbol->name;
1317 bfd_print_symbol_vandf (abfd, file, symbol);
1320 fprintf (file, " %s\t", section_name);
1321 /* Print the "other" value for a symbol. For common symbols,
1322 we've already printed the size; now print the alignment.
1323 For other symbols, we have no specified alignment, and
1324 we've printed the address; now print the size. */
1325 if (bfd_is_com_section (symbol->section))
1326 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1328 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1329 bfd_fprintf_vma (abfd, file, val);
1331 /* If we have version information, print it. */
1332 if (elf_tdata (abfd)->dynversym_section != 0
1333 && (elf_tdata (abfd)->dynverdef_section != 0
1334 || elf_tdata (abfd)->dynverref_section != 0))
1336 unsigned int vernum;
1337 const char *version_string;
1339 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1342 version_string = "";
1343 else if (vernum == 1)
1344 version_string = "Base";
1345 else if (vernum <= elf_tdata (abfd)->cverdefs)
1347 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1350 Elf_Internal_Verneed *t;
1352 version_string = "";
1353 for (t = elf_tdata (abfd)->verref;
1357 Elf_Internal_Vernaux *a;
1359 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1361 if (a->vna_other == vernum)
1363 version_string = a->vna_nodename;
1370 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1371 fprintf (file, " %-11s", version_string);
1376 fprintf (file, " (%s)", version_string);
1377 for (i = 10 - strlen (version_string); i > 0; --i)
1382 /* If the st_other field is not zero, print it. */
1383 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1388 case STV_INTERNAL: fprintf (file, " .internal"); break;
1389 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1390 case STV_PROTECTED: fprintf (file, " .protected"); break;
1392 /* Some other non-defined flags are also present, so print
1394 fprintf (file, " 0x%02x", (unsigned int) st_other);
1397 fprintf (file, " %s", name);
1403 /* Create an entry in an ELF linker hash table. */
1405 struct bfd_hash_entry *
1406 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
1407 struct bfd_hash_table *table,
1410 /* Allocate the structure if it has not already been allocated by a
1414 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1419 /* Call the allocation method of the superclass. */
1420 entry = _bfd_link_hash_newfunc (entry, table, string);
1423 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1424 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1426 /* Set local fields. */
1429 ret->got = ret->plt = htab->init_refcount;
1430 memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry)
1431 - offsetof (struct elf_link_hash_entry, size)));
1432 /* Assume that we have been called by a non-ELF symbol reader.
1433 This flag is then reset by the code which reads an ELF input
1434 file. This ensures that a symbol created by a non-ELF symbol
1435 reader will have the flag set correctly. */
1442 /* Copy data from an indirect symbol to its direct symbol, hiding the
1443 old indirect symbol. Also used for copying flags to a weakdef. */
1446 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data *bed,
1447 struct elf_link_hash_entry *dir,
1448 struct elf_link_hash_entry *ind)
1451 bfd_signed_vma lowest_valid = bed->can_refcount;
1453 /* Copy down any references that we may have already seen to the
1454 symbol which just became indirect. */
1456 dir->ref_dynamic |= ind->ref_dynamic;
1457 dir->ref_regular |= ind->ref_regular;
1458 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1459 dir->non_got_ref |= ind->non_got_ref;
1460 dir->needs_plt |= ind->needs_plt;
1461 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1463 if (ind->root.type != bfd_link_hash_indirect)
1466 /* Copy over the global and procedure linkage table refcount entries.
1467 These may have been already set up by a check_relocs routine. */
1468 tmp = dir->got.refcount;
1469 if (tmp < lowest_valid)
1471 dir->got.refcount = ind->got.refcount;
1472 ind->got.refcount = tmp;
1475 BFD_ASSERT (ind->got.refcount < lowest_valid);
1477 tmp = dir->plt.refcount;
1478 if (tmp < lowest_valid)
1480 dir->plt.refcount = ind->plt.refcount;
1481 ind->plt.refcount = tmp;
1484 BFD_ASSERT (ind->plt.refcount < lowest_valid);
1486 if (dir->dynindx == -1)
1488 dir->dynindx = ind->dynindx;
1489 dir->dynstr_index = ind->dynstr_index;
1491 ind->dynstr_index = 0;
1494 BFD_ASSERT (ind->dynindx == -1);
1498 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info,
1499 struct elf_link_hash_entry *h,
1500 bfd_boolean force_local)
1502 h->plt = elf_hash_table (info)->init_offset;
1506 h->forced_local = 1;
1507 if (h->dynindx != -1)
1510 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1516 /* Initialize an ELF linker hash table. */
1519 _bfd_elf_link_hash_table_init
1520 (struct elf_link_hash_table *table,
1522 struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
1523 struct bfd_hash_table *,
1528 table->dynamic_sections_created = FALSE;
1529 table->dynobj = NULL;
1530 /* Make sure can_refcount is extended to the width and signedness of
1531 init_refcount before we subtract one from it. */
1532 table->init_refcount.refcount = get_elf_backend_data (abfd)->can_refcount;
1533 table->init_refcount.refcount -= 1;
1534 table->init_offset.offset = -(bfd_vma) 1;
1535 /* The first dynamic symbol is a dummy. */
1536 table->dynsymcount = 1;
1537 table->dynstr = NULL;
1538 table->bucketcount = 0;
1539 table->needed = NULL;
1541 table->merge_info = NULL;
1542 memset (&table->stab_info, 0, sizeof (table->stab_info));
1543 memset (&table->eh_info, 0, sizeof (table->eh_info));
1544 table->dynlocal = NULL;
1545 table->runpath = NULL;
1546 table->tls_sec = NULL;
1547 table->tls_size = 0;
1548 table->loaded = NULL;
1549 table->is_relocatable_executable = FALSE;
1551 ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc);
1552 table->root.type = bfd_link_elf_hash_table;
1557 /* Create an ELF linker hash table. */
1559 struct bfd_link_hash_table *
1560 _bfd_elf_link_hash_table_create (bfd *abfd)
1562 struct elf_link_hash_table *ret;
1563 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1565 ret = bfd_malloc (amt);
1569 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
1578 /* This is a hook for the ELF emulation code in the generic linker to
1579 tell the backend linker what file name to use for the DT_NEEDED
1580 entry for a dynamic object. */
1583 bfd_elf_set_dt_needed_name (bfd *abfd, const char *name)
1585 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1586 && bfd_get_format (abfd) == bfd_object)
1587 elf_dt_name (abfd) = name;
1591 bfd_elf_get_dyn_lib_class (bfd *abfd)
1594 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1595 && bfd_get_format (abfd) == bfd_object)
1596 lib_class = elf_dyn_lib_class (abfd);
1603 bfd_elf_set_dyn_lib_class (bfd *abfd, int lib_class)
1605 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1606 && bfd_get_format (abfd) == bfd_object)
1607 elf_dyn_lib_class (abfd) = lib_class;
1610 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1611 the linker ELF emulation code. */
1613 struct bfd_link_needed_list *
1614 bfd_elf_get_needed_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)->needed;
1622 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1623 hook for the linker ELF emulation code. */
1625 struct bfd_link_needed_list *
1626 bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED,
1627 struct bfd_link_info *info)
1629 if (! is_elf_hash_table (info->hash))
1631 return elf_hash_table (info)->runpath;
1634 /* Get the name actually used for a dynamic object for a link. This
1635 is the SONAME entry if there is one. Otherwise, it is the string
1636 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1639 bfd_elf_get_dt_soname (bfd *abfd)
1641 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1642 && bfd_get_format (abfd) == bfd_object)
1643 return elf_dt_name (abfd);
1647 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1648 the ELF linker emulation code. */
1651 bfd_elf_get_bfd_needed_list (bfd *abfd,
1652 struct bfd_link_needed_list **pneeded)
1655 bfd_byte *dynbuf = NULL;
1657 unsigned long shlink;
1658 bfd_byte *extdyn, *extdynend;
1660 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1664 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1665 || bfd_get_format (abfd) != bfd_object)
1668 s = bfd_get_section_by_name (abfd, ".dynamic");
1669 if (s == NULL || s->size == 0)
1672 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1675 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1679 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1681 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1682 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1685 extdynend = extdyn + s->size;
1686 for (; extdyn < extdynend; extdyn += extdynsize)
1688 Elf_Internal_Dyn dyn;
1690 (*swap_dyn_in) (abfd, extdyn, &dyn);
1692 if (dyn.d_tag == DT_NULL)
1695 if (dyn.d_tag == DT_NEEDED)
1698 struct bfd_link_needed_list *l;
1699 unsigned int tagv = dyn.d_un.d_val;
1702 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1707 l = bfd_alloc (abfd, amt);
1728 /* Allocate an ELF string table--force the first byte to be zero. */
1730 struct bfd_strtab_hash *
1731 _bfd_elf_stringtab_init (void)
1733 struct bfd_strtab_hash *ret;
1735 ret = _bfd_stringtab_init ();
1740 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1741 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1742 if (loc == (bfd_size_type) -1)
1744 _bfd_stringtab_free (ret);
1751 /* ELF .o/exec file reading */
1753 /* Create a new bfd section from an ELF section header. */
1756 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1758 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1759 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1760 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1763 name = bfd_elf_string_from_elf_section (abfd,
1764 elf_elfheader (abfd)->e_shstrndx,
1767 switch (hdr->sh_type)
1770 /* Inactive section. Throw it away. */
1773 case SHT_PROGBITS: /* Normal section with contents. */
1774 case SHT_NOBITS: /* .bss section. */
1775 case SHT_HASH: /* .hash section. */
1776 case SHT_NOTE: /* .note section. */
1777 case SHT_INIT_ARRAY: /* .init_array section. */
1778 case SHT_FINI_ARRAY: /* .fini_array section. */
1779 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1780 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1781 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1783 case SHT_DYNAMIC: /* Dynamic linking information. */
1784 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1786 if (hdr->sh_link > elf_numsections (abfd)
1787 || elf_elfsections (abfd)[hdr->sh_link] == NULL)
1789 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1791 Elf_Internal_Shdr *dynsymhdr;
1793 /* The shared libraries distributed with hpux11 have a bogus
1794 sh_link field for the ".dynamic" section. Find the
1795 string table for the ".dynsym" section instead. */
1796 if (elf_dynsymtab (abfd) != 0)
1798 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1799 hdr->sh_link = dynsymhdr->sh_link;
1803 unsigned int i, num_sec;
1805 num_sec = elf_numsections (abfd);
1806 for (i = 1; i < num_sec; i++)
1808 dynsymhdr = elf_elfsections (abfd)[i];
1809 if (dynsymhdr->sh_type == SHT_DYNSYM)
1811 hdr->sh_link = dynsymhdr->sh_link;
1819 case SHT_SYMTAB: /* A symbol table */
1820 if (elf_onesymtab (abfd) == shindex)
1823 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1824 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1825 elf_onesymtab (abfd) = shindex;
1826 elf_tdata (abfd)->symtab_hdr = *hdr;
1827 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1828 abfd->flags |= HAS_SYMS;
1830 /* Sometimes a shared object will map in the symbol table. If
1831 SHF_ALLOC is set, and this is a shared object, then we also
1832 treat this section as a BFD section. We can not base the
1833 decision purely on SHF_ALLOC, because that flag is sometimes
1834 set in a relocatable object file, which would confuse the
1836 if ((hdr->sh_flags & SHF_ALLOC) != 0
1837 && (abfd->flags & DYNAMIC) != 0
1838 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1842 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1843 can't read symbols without that section loaded as well. It
1844 is most likely specified by the next section header. */
1845 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1847 unsigned int i, num_sec;
1849 num_sec = elf_numsections (abfd);
1850 for (i = shindex + 1; i < num_sec; i++)
1852 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1853 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1854 && hdr2->sh_link == shindex)
1858 for (i = 1; i < shindex; i++)
1860 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1861 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1862 && hdr2->sh_link == shindex)
1866 return bfd_section_from_shdr (abfd, i);
1870 case SHT_DYNSYM: /* A dynamic symbol table */
1871 if (elf_dynsymtab (abfd) == shindex)
1874 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1875 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1876 elf_dynsymtab (abfd) = shindex;
1877 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1878 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1879 abfd->flags |= HAS_SYMS;
1881 /* Besides being a symbol table, we also treat this as a regular
1882 section, so that objcopy can handle it. */
1883 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1885 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1886 if (elf_symtab_shndx (abfd) == shindex)
1889 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1890 elf_symtab_shndx (abfd) = shindex;
1891 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1892 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1895 case SHT_STRTAB: /* A string table */
1896 if (hdr->bfd_section != NULL)
1898 if (ehdr->e_shstrndx == shindex)
1900 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1901 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1904 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1907 elf_tdata (abfd)->strtab_hdr = *hdr;
1908 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1911 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1914 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1915 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1916 elf_elfsections (abfd)[shindex] = hdr;
1917 /* We also treat this as a regular section, so that objcopy
1919 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1923 /* If the string table isn't one of the above, then treat it as a
1924 regular section. We need to scan all the headers to be sure,
1925 just in case this strtab section appeared before the above. */
1926 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1928 unsigned int i, num_sec;
1930 num_sec = elf_numsections (abfd);
1931 for (i = 1; i < num_sec; i++)
1933 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1934 if (hdr2->sh_link == shindex)
1936 if (! bfd_section_from_shdr (abfd, i))
1938 if (elf_onesymtab (abfd) == i)
1940 if (elf_dynsymtab (abfd) == i)
1941 goto dynsymtab_strtab;
1945 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1949 /* *These* do a lot of work -- but build no sections! */
1951 asection *target_sect;
1952 Elf_Internal_Shdr *hdr2;
1953 unsigned int num_sec = elf_numsections (abfd);
1955 /* Check for a bogus link to avoid crashing. */
1956 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1957 || hdr->sh_link >= num_sec)
1959 ((*_bfd_error_handler)
1960 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1961 abfd, hdr->sh_link, name, shindex));
1962 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1966 /* For some incomprehensible reason Oracle distributes
1967 libraries for Solaris in which some of the objects have
1968 bogus sh_link fields. It would be nice if we could just
1969 reject them, but, unfortunately, some people need to use
1970 them. We scan through the section headers; if we find only
1971 one suitable symbol table, we clobber the sh_link to point
1972 to it. I hope this doesn't break anything. */
1973 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1974 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1980 for (scan = 1; scan < num_sec; scan++)
1982 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1983 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1994 hdr->sh_link = found;
1997 /* Get the symbol table. */
1998 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1999 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
2000 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
2003 /* If this reloc section does not use the main symbol table we
2004 don't treat it as a reloc section. BFD can't adequately
2005 represent such a section, so at least for now, we don't
2006 try. We just present it as a normal section. We also
2007 can't use it as a reloc section if it points to the null
2009 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF)
2010 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2013 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
2015 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
2016 if (target_sect == NULL)
2019 if ((target_sect->flags & SEC_RELOC) == 0
2020 || target_sect->reloc_count == 0)
2021 hdr2 = &elf_section_data (target_sect)->rel_hdr;
2025 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
2026 amt = sizeof (*hdr2);
2027 hdr2 = bfd_alloc (abfd, amt);
2028 elf_section_data (target_sect)->rel_hdr2 = hdr2;
2031 elf_elfsections (abfd)[shindex] = hdr2;
2032 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
2033 target_sect->flags |= SEC_RELOC;
2034 target_sect->relocation = NULL;
2035 target_sect->rel_filepos = hdr->sh_offset;
2036 /* In the section to which the relocations apply, mark whether
2037 its relocations are of the REL or RELA variety. */
2038 if (hdr->sh_size != 0)
2039 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
2040 abfd->flags |= HAS_RELOC;
2045 case SHT_GNU_verdef:
2046 elf_dynverdef (abfd) = shindex;
2047 elf_tdata (abfd)->dynverdef_hdr = *hdr;
2048 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2051 case SHT_GNU_versym:
2052 elf_dynversym (abfd) = shindex;
2053 elf_tdata (abfd)->dynversym_hdr = *hdr;
2054 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2057 case SHT_GNU_verneed:
2058 elf_dynverref (abfd) = shindex;
2059 elf_tdata (abfd)->dynverref_hdr = *hdr;
2060 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2067 /* We need a BFD section for objcopy and relocatable linking,
2068 and it's handy to have the signature available as the section
2070 name = group_signature (abfd, hdr);
2073 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2075 if (hdr->contents != NULL)
2077 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
2078 unsigned int n_elt = hdr->sh_size / 4;
2081 if (idx->flags & GRP_COMDAT)
2082 hdr->bfd_section->flags
2083 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
2085 /* We try to keep the same section order as it comes in. */
2087 while (--n_elt != 0)
2088 if ((s = (--idx)->shdr->bfd_section) != NULL
2089 && elf_next_in_group (s) != NULL)
2091 elf_next_in_group (hdr->bfd_section) = s;
2098 /* Check for any processor-specific section types. */
2099 return bed->elf_backend_section_from_shdr (abfd, hdr, name,
2106 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2107 Return SEC for sections that have no elf section, and NULL on error. */
2110 bfd_section_from_r_symndx (bfd *abfd,
2111 struct sym_sec_cache *cache,
2113 unsigned long r_symndx)
2115 Elf_Internal_Shdr *symtab_hdr;
2116 unsigned char esym[sizeof (Elf64_External_Sym)];
2117 Elf_External_Sym_Shndx eshndx;
2118 Elf_Internal_Sym isym;
2119 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2121 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
2122 return cache->sec[ent];
2124 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2125 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2126 &isym, esym, &eshndx) == NULL)
2129 if (cache->abfd != abfd)
2131 memset (cache->indx, -1, sizeof (cache->indx));
2134 cache->indx[ent] = r_symndx;
2135 cache->sec[ent] = sec;
2136 if ((isym.st_shndx != SHN_UNDEF && isym.st_shndx < SHN_LORESERVE)
2137 || isym.st_shndx > SHN_HIRESERVE)
2140 s = bfd_section_from_elf_index (abfd, isym.st_shndx);
2142 cache->sec[ent] = s;
2144 return cache->sec[ent];
2147 /* Given an ELF section number, retrieve the corresponding BFD
2151 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
2153 if (index >= elf_numsections (abfd))
2155 return elf_elfsections (abfd)[index]->bfd_section;
2158 static struct bfd_elf_special_section const special_sections_b[] =
2160 { ".bss", 4, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2161 { NULL, 0, 0, 0, 0 }
2164 static struct bfd_elf_special_section const special_sections_c[] =
2166 { ".comment", 8, 0, SHT_PROGBITS, 0 },
2167 { NULL, 0, 0, 0, 0 }
2170 static struct bfd_elf_special_section const special_sections_d[] =
2172 { ".data", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2173 { ".data1", 6, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2174 { ".debug", 6, 0, SHT_PROGBITS, 0 },
2175 { ".debug_line", 11, 0, SHT_PROGBITS, 0 },
2176 { ".debug_info", 11, 0, SHT_PROGBITS, 0 },
2177 { ".debug_abbrev", 13, 0, SHT_PROGBITS, 0 },
2178 { ".debug_aranges", 14, 0, SHT_PROGBITS, 0 },
2179 { ".dynamic", 8, 0, SHT_DYNAMIC, SHF_ALLOC },
2180 { ".dynstr", 7, 0, SHT_STRTAB, SHF_ALLOC },
2181 { ".dynsym", 7, 0, SHT_DYNSYM, SHF_ALLOC },
2182 { NULL, 0, 0, 0, 0 }
2185 static struct bfd_elf_special_section const special_sections_f[] =
2187 { ".fini", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2188 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2189 { NULL, 0, 0, 0, 0 }
2192 static struct bfd_elf_special_section const special_sections_g[] =
2194 { ".gnu.linkonce.b",15, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2195 { ".got", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2196 { ".gnu.version", 12, 0, SHT_GNU_versym, 0 },
2197 { ".gnu.version_d", 14, 0, SHT_GNU_verdef, 0 },
2198 { ".gnu.version_r", 14, 0, SHT_GNU_verneed, 0 },
2199 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2200 { ".gnu.conflict", 13, 0, SHT_RELA, SHF_ALLOC },
2201 { NULL, 0, 0, 0, 0 }
2204 static struct bfd_elf_special_section const special_sections_h[] =
2206 { ".hash", 5, 0, SHT_HASH, SHF_ALLOC },
2207 { NULL, 0, 0, 0, 0 }
2210 static struct bfd_elf_special_section const special_sections_i[] =
2212 { ".init", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2213 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2214 { ".interp", 7, 0, SHT_PROGBITS, 0 },
2215 { NULL, 0, 0, 0, 0 }
2218 static struct bfd_elf_special_section const special_sections_l[] =
2220 { ".line", 5, 0, SHT_PROGBITS, 0 },
2221 { NULL, 0, 0, 0, 0 }
2224 static struct bfd_elf_special_section const special_sections_n[] =
2226 { ".note.GNU-stack",15, 0, SHT_PROGBITS, 0 },
2227 { ".note", 5, -1, SHT_NOTE, 0 },
2228 { NULL, 0, 0, 0, 0 }
2231 static struct bfd_elf_special_section const special_sections_p[] =
2233 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2234 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2235 { NULL, 0, 0, 0, 0 }
2238 static struct bfd_elf_special_section const special_sections_r[] =
2240 { ".rodata", 7, -2, SHT_PROGBITS, SHF_ALLOC },
2241 { ".rodata1", 8, 0, SHT_PROGBITS, SHF_ALLOC },
2242 { ".rela", 5, -1, SHT_RELA, 0 },
2243 { ".rel", 4, -1, SHT_REL, 0 },
2244 { NULL, 0, 0, 0, 0 }
2247 static struct bfd_elf_special_section const special_sections_s[] =
2249 { ".shstrtab", 9, 0, SHT_STRTAB, 0 },
2250 { ".strtab", 7, 0, SHT_STRTAB, 0 },
2251 { ".symtab", 7, 0, SHT_SYMTAB, 0 },
2252 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2253 { NULL, 0, 0, 0, 0 }
2256 static struct bfd_elf_special_section const special_sections_t[] =
2258 { ".text", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2259 { ".tbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2260 { ".tdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2261 { NULL, 0, 0, 0, 0 }
2264 static struct bfd_elf_special_section const *special_sections [27] =
2267 special_sections_b, /* 'b' */
2268 special_sections_c, /* 'b' */
2269 special_sections_d, /* 'd' */
2271 special_sections_f, /* 'f' */
2272 special_sections_g, /* 'g' */
2273 special_sections_h, /* 'h' */
2274 special_sections_i, /* 'i' */
2277 special_sections_l, /* 'l' */
2279 special_sections_n, /* 'n' */
2281 special_sections_p, /* 'p' */
2283 special_sections_r, /* 'r' */
2284 special_sections_s, /* 's' */
2285 special_sections_t, /* 't' */
2295 static const struct bfd_elf_special_section *
2296 get_special_section (const char *name,
2297 const struct bfd_elf_special_section **special_sections_p,
2302 const struct bfd_elf_special_section *special_sections;
2304 if (name [0] == '.')
2307 if (i < 0 || i > 25)
2313 special_sections = special_sections_p [i];
2315 if (!special_sections)
2316 return special_sections;
2320 for (i = 0; special_sections[i].prefix != NULL; i++)
2323 int prefix_len = special_sections[i].prefix_length;
2325 if (len < prefix_len)
2327 if (memcmp (name, special_sections[i].prefix, prefix_len) != 0)
2330 suffix_len = special_sections[i].suffix_length;
2331 if (suffix_len <= 0)
2333 if (name[prefix_len] != 0)
2335 if (suffix_len == 0)
2337 if (name[prefix_len] != '.'
2338 && (suffix_len == -2
2339 || (rela && special_sections[i].type == SHT_REL)))
2345 if (len < prefix_len + suffix_len)
2347 if (memcmp (name + len - suffix_len,
2348 special_sections[i].prefix + prefix_len,
2352 return &special_sections[i];
2358 const struct bfd_elf_special_section *
2359 _bfd_elf_get_sec_type_attr (bfd *abfd, const char *name)
2361 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2362 const struct bfd_elf_special_section *ssect = NULL;
2364 /* See if this is one of the special sections. */
2367 unsigned int rela = bed->default_use_rela_p;
2369 if (bed->special_sections)
2370 ssect = get_special_section (name, bed->special_sections, rela);
2373 ssect = get_special_section (name, special_sections, rela);
2380 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2382 struct bfd_elf_section_data *sdata;
2383 const struct bfd_elf_special_section *ssect;
2385 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2388 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2391 sec->used_by_bfd = sdata;
2394 /* When we read a file, we don't need section type and flags unless
2395 it is a linker created section. They will be overridden in
2396 _bfd_elf_make_section_from_shdr anyway. */
2397 if (abfd->direction != read_direction
2398 || (sec->flags & SEC_LINKER_CREATED) != 0)
2400 ssect = _bfd_elf_get_sec_type_attr (abfd, sec->name);
2403 elf_section_type (sec) = ssect->type;
2404 elf_section_flags (sec) = ssect->attr;
2408 /* Indicate whether or not this section should use RELA relocations. */
2409 sec->use_rela_p = get_elf_backend_data (abfd)->default_use_rela_p;
2414 /* Create a new bfd section from an ELF program header.
2416 Since program segments have no names, we generate a synthetic name
2417 of the form segment<NUM>, where NUM is generally the index in the
2418 program header table. For segments that are split (see below) we
2419 generate the names segment<NUM>a and segment<NUM>b.
2421 Note that some program segments may have a file size that is different than
2422 (less than) the memory size. All this means is that at execution the
2423 system must allocate the amount of memory specified by the memory size,
2424 but only initialize it with the first "file size" bytes read from the
2425 file. This would occur for example, with program segments consisting
2426 of combined data+bss.
2428 To handle the above situation, this routine generates TWO bfd sections
2429 for the single program segment. The first has the length specified by
2430 the file size of the segment, and the second has the length specified
2431 by the difference between the two sizes. In effect, the segment is split
2432 into it's initialized and uninitialized parts.
2437 _bfd_elf_make_section_from_phdr (bfd *abfd,
2438 Elf_Internal_Phdr *hdr,
2440 const char *typename)
2448 split = ((hdr->p_memsz > 0)
2449 && (hdr->p_filesz > 0)
2450 && (hdr->p_memsz > hdr->p_filesz));
2451 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2452 len = strlen (namebuf) + 1;
2453 name = bfd_alloc (abfd, len);
2456 memcpy (name, namebuf, len);
2457 newsect = bfd_make_section (abfd, name);
2458 if (newsect == NULL)
2460 newsect->vma = hdr->p_vaddr;
2461 newsect->lma = hdr->p_paddr;
2462 newsect->size = hdr->p_filesz;
2463 newsect->filepos = hdr->p_offset;
2464 newsect->flags |= SEC_HAS_CONTENTS;
2465 newsect->alignment_power = bfd_log2 (hdr->p_align);
2466 if (hdr->p_type == PT_LOAD)
2468 newsect->flags |= SEC_ALLOC;
2469 newsect->flags |= SEC_LOAD;
2470 if (hdr->p_flags & PF_X)
2472 /* FIXME: all we known is that it has execute PERMISSION,
2474 newsect->flags |= SEC_CODE;
2477 if (!(hdr->p_flags & PF_W))
2479 newsect->flags |= SEC_READONLY;
2484 sprintf (namebuf, "%s%db", typename, index);
2485 len = strlen (namebuf) + 1;
2486 name = bfd_alloc (abfd, len);
2489 memcpy (name, namebuf, len);
2490 newsect = bfd_make_section (abfd, name);
2491 if (newsect == NULL)
2493 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2494 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2495 newsect->size = hdr->p_memsz - hdr->p_filesz;
2496 if (hdr->p_type == PT_LOAD)
2498 newsect->flags |= SEC_ALLOC;
2499 if (hdr->p_flags & PF_X)
2500 newsect->flags |= SEC_CODE;
2502 if (!(hdr->p_flags & PF_W))
2503 newsect->flags |= SEC_READONLY;
2510 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2512 const struct elf_backend_data *bed;
2514 switch (hdr->p_type)
2517 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2520 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2523 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2526 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2529 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2531 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2536 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2539 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2541 case PT_GNU_EH_FRAME:
2542 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2546 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2549 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
2552 /* Check for any processor-specific program segment types. */
2553 bed = get_elf_backend_data (abfd);
2554 return bed->elf_backend_section_from_phdr (abfd, hdr, index, "proc");
2558 /* Initialize REL_HDR, the section-header for new section, containing
2559 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2560 relocations; otherwise, we use REL relocations. */
2563 _bfd_elf_init_reloc_shdr (bfd *abfd,
2564 Elf_Internal_Shdr *rel_hdr,
2566 bfd_boolean use_rela_p)
2569 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2570 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2572 name = bfd_alloc (abfd, amt);
2575 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2577 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2579 if (rel_hdr->sh_name == (unsigned int) -1)
2581 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2582 rel_hdr->sh_entsize = (use_rela_p
2583 ? bed->s->sizeof_rela
2584 : bed->s->sizeof_rel);
2585 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2586 rel_hdr->sh_flags = 0;
2587 rel_hdr->sh_addr = 0;
2588 rel_hdr->sh_size = 0;
2589 rel_hdr->sh_offset = 0;
2594 /* Set up an ELF internal section header for a section. */
2597 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2599 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2600 bfd_boolean *failedptr = failedptrarg;
2601 Elf_Internal_Shdr *this_hdr;
2605 /* We already failed; just get out of the bfd_map_over_sections
2610 this_hdr = &elf_section_data (asect)->this_hdr;
2612 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2613 asect->name, FALSE);
2614 if (this_hdr->sh_name == (unsigned int) -1)
2620 this_hdr->sh_flags = 0;
2622 if ((asect->flags & SEC_ALLOC) != 0
2623 || asect->user_set_vma)
2624 this_hdr->sh_addr = asect->vma;
2626 this_hdr->sh_addr = 0;
2628 this_hdr->sh_offset = 0;
2629 this_hdr->sh_size = asect->size;
2630 this_hdr->sh_link = 0;
2631 this_hdr->sh_addralign = 1 << asect->alignment_power;
2632 /* The sh_entsize and sh_info fields may have been set already by
2633 copy_private_section_data. */
2635 this_hdr->bfd_section = asect;
2636 this_hdr->contents = NULL;
2638 /* If the section type is unspecified, we set it based on
2640 if (this_hdr->sh_type == SHT_NULL)
2642 if ((asect->flags & SEC_GROUP) != 0)
2644 /* We also need to mark SHF_GROUP here for relocatable
2646 struct bfd_link_order *l;
2649 for (l = asect->map_head.link_order; l != NULL; l = l->next)
2650 if (l->type == bfd_indirect_link_order
2651 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2654 /* The name is not important. Anything will do. */
2655 elf_group_name (elt->output_section) = "G";
2656 elf_section_flags (elt->output_section) |= SHF_GROUP;
2658 elt = elf_next_in_group (elt);
2659 /* During a relocatable link, the lists are
2662 while (elt != elf_next_in_group (l->u.indirect.section));
2664 this_hdr->sh_type = SHT_GROUP;
2666 else if ((asect->flags & SEC_ALLOC) != 0
2667 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2668 || (asect->flags & SEC_NEVER_LOAD) != 0))
2669 this_hdr->sh_type = SHT_NOBITS;
2671 this_hdr->sh_type = SHT_PROGBITS;
2674 switch (this_hdr->sh_type)
2680 case SHT_INIT_ARRAY:
2681 case SHT_FINI_ARRAY:
2682 case SHT_PREINIT_ARRAY:
2689 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2693 this_hdr->sh_entsize = bed->s->sizeof_sym;
2697 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2701 if (get_elf_backend_data (abfd)->may_use_rela_p)
2702 this_hdr->sh_entsize = bed->s->sizeof_rela;
2706 if (get_elf_backend_data (abfd)->may_use_rel_p)
2707 this_hdr->sh_entsize = bed->s->sizeof_rel;
2710 case SHT_GNU_versym:
2711 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2714 case SHT_GNU_verdef:
2715 this_hdr->sh_entsize = 0;
2716 /* objcopy or strip will copy over sh_info, but may not set
2717 cverdefs. The linker will set cverdefs, but sh_info will be
2719 if (this_hdr->sh_info == 0)
2720 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2722 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2723 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2726 case SHT_GNU_verneed:
2727 this_hdr->sh_entsize = 0;
2728 /* objcopy or strip will copy over sh_info, but may not set
2729 cverrefs. The linker will set cverrefs, but sh_info will be
2731 if (this_hdr->sh_info == 0)
2732 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2734 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2735 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2739 this_hdr->sh_entsize = 4;
2743 if ((asect->flags & SEC_ALLOC) != 0)
2744 this_hdr->sh_flags |= SHF_ALLOC;
2745 if ((asect->flags & SEC_READONLY) == 0)
2746 this_hdr->sh_flags |= SHF_WRITE;
2747 if ((asect->flags & SEC_CODE) != 0)
2748 this_hdr->sh_flags |= SHF_EXECINSTR;
2749 if ((asect->flags & SEC_MERGE) != 0)
2751 this_hdr->sh_flags |= SHF_MERGE;
2752 this_hdr->sh_entsize = asect->entsize;
2753 if ((asect->flags & SEC_STRINGS) != 0)
2754 this_hdr->sh_flags |= SHF_STRINGS;
2756 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2757 this_hdr->sh_flags |= SHF_GROUP;
2758 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2760 this_hdr->sh_flags |= SHF_TLS;
2761 if (asect->size == 0 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2763 struct bfd_link_order *o;
2765 this_hdr->sh_size = 0;
2766 for (o = asect->map_head.link_order; o != NULL; o = o->next)
2767 if (this_hdr->sh_size < o->offset + o->size)
2768 this_hdr->sh_size = o->offset + o->size;
2769 if (this_hdr->sh_size)
2770 this_hdr->sh_type = SHT_NOBITS;
2774 /* Check for processor-specific section types. */
2775 if (bed->elf_backend_fake_sections
2776 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2779 /* If the section has relocs, set up a section header for the
2780 SHT_REL[A] section. If two relocation sections are required for
2781 this section, it is up to the processor-specific back-end to
2782 create the other. */
2783 if ((asect->flags & SEC_RELOC) != 0
2784 && !_bfd_elf_init_reloc_shdr (abfd,
2785 &elf_section_data (asect)->rel_hdr,
2791 /* Fill in the contents of a SHT_GROUP section. */
2794 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2796 bfd_boolean *failedptr = failedptrarg;
2797 unsigned long symindx;
2798 asection *elt, *first;
2800 struct bfd_link_order *l;
2803 /* Ignore linker created group section. See elfNN_ia64_object_p in
2805 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2810 if (elf_group_id (sec) != NULL)
2811 symindx = elf_group_id (sec)->udata.i;
2815 /* If called from the assembler, swap_out_syms will have set up
2816 elf_section_syms; If called for "ld -r", use target_index. */
2817 if (elf_section_syms (abfd) != NULL)
2818 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2820 symindx = sec->target_index;
2822 elf_section_data (sec)->this_hdr.sh_info = symindx;
2824 /* The contents won't be allocated for "ld -r" or objcopy. */
2826 if (sec->contents == NULL)
2829 sec->contents = bfd_alloc (abfd, sec->size);
2831 /* Arrange for the section to be written out. */
2832 elf_section_data (sec)->this_hdr.contents = sec->contents;
2833 if (sec->contents == NULL)
2840 loc = sec->contents + sec->size;
2842 /* Get the pointer to the first section in the group that gas
2843 squirreled away here. objcopy arranges for this to be set to the
2844 start of the input section group. */
2845 first = elt = elf_next_in_group (sec);
2847 /* First element is a flag word. Rest of section is elf section
2848 indices for all the sections of the group. Write them backwards
2849 just to keep the group in the same order as given in .section
2850 directives, not that it matters. */
2859 s = s->output_section;
2862 idx = elf_section_data (s)->this_idx;
2863 H_PUT_32 (abfd, idx, loc);
2864 elt = elf_next_in_group (elt);
2869 /* If this is a relocatable link, then the above did nothing because
2870 SEC is the output section. Look through the input sections
2872 for (l = sec->map_head.link_order; l != NULL; l = l->next)
2873 if (l->type == bfd_indirect_link_order
2874 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2879 elf_section_data (elt->output_section)->this_idx, loc);
2880 elt = elf_next_in_group (elt);
2881 /* During a relocatable link, the lists are circular. */
2883 while (elt != elf_next_in_group (l->u.indirect.section));
2885 if ((loc -= 4) != sec->contents)
2888 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2891 /* Assign all ELF section numbers. The dummy first section is handled here
2892 too. The link/info pointers for the standard section types are filled
2893 in here too, while we're at it. */
2896 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2898 struct elf_obj_tdata *t = elf_tdata (abfd);
2900 unsigned int section_number, secn;
2901 Elf_Internal_Shdr **i_shdrp;
2903 struct bfd_elf_section_data *d;
2907 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2909 /* SHT_GROUP sections are in relocatable files only. */
2910 if (link_info == NULL || link_info->relocatable)
2912 /* Put SHT_GROUP sections first. */
2913 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2915 d = elf_section_data (sec);
2917 if (d->this_hdr.sh_type == SHT_GROUP)
2919 if (sec->flags & SEC_LINKER_CREATED)
2921 /* Remove the linker created SHT_GROUP sections. */
2922 bfd_section_list_remove (abfd, sec);
2923 abfd->section_count--;
2927 if (section_number == SHN_LORESERVE)
2928 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2929 d->this_idx = section_number++;
2935 for (sec = abfd->sections; sec; sec = sec->next)
2937 d = elf_section_data (sec);
2939 if (d->this_hdr.sh_type != SHT_GROUP)
2941 if (section_number == SHN_LORESERVE)
2942 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2943 d->this_idx = section_number++;
2945 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2946 if ((sec->flags & SEC_RELOC) == 0)
2950 if (section_number == SHN_LORESERVE)
2951 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2952 d->rel_idx = section_number++;
2953 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2958 if (section_number == SHN_LORESERVE)
2959 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2960 d->rel_idx2 = section_number++;
2961 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2967 if (section_number == SHN_LORESERVE)
2968 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2969 t->shstrtab_section = section_number++;
2970 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2971 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2973 if (bfd_get_symcount (abfd) > 0)
2975 if (section_number == SHN_LORESERVE)
2976 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2977 t->symtab_section = section_number++;
2978 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2979 if (section_number > SHN_LORESERVE - 2)
2981 if (section_number == SHN_LORESERVE)
2982 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2983 t->symtab_shndx_section = section_number++;
2984 t->symtab_shndx_hdr.sh_name
2985 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2986 ".symtab_shndx", FALSE);
2987 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2990 if (section_number == SHN_LORESERVE)
2991 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2992 t->strtab_section = section_number++;
2993 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2996 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2997 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2999 elf_numsections (abfd) = section_number;
3000 elf_elfheader (abfd)->e_shnum = section_number;
3001 if (section_number > SHN_LORESERVE)
3002 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
3004 /* Set up the list of section header pointers, in agreement with the
3006 amt = section_number * sizeof (Elf_Internal_Shdr *);
3007 i_shdrp = bfd_zalloc (abfd, amt);
3008 if (i_shdrp == NULL)
3011 amt = sizeof (Elf_Internal_Shdr);
3012 i_shdrp[0] = bfd_zalloc (abfd, amt);
3013 if (i_shdrp[0] == NULL)
3015 bfd_release (abfd, i_shdrp);
3019 elf_elfsections (abfd) = i_shdrp;
3021 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
3022 if (bfd_get_symcount (abfd) > 0)
3024 i_shdrp[t->symtab_section] = &t->symtab_hdr;
3025 if (elf_numsections (abfd) > SHN_LORESERVE)
3027 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
3028 t->symtab_shndx_hdr.sh_link = t->symtab_section;
3030 i_shdrp[t->strtab_section] = &t->strtab_hdr;
3031 t->symtab_hdr.sh_link = t->strtab_section;
3034 for (sec = abfd->sections; sec; sec = sec->next)
3036 struct bfd_elf_section_data *d = elf_section_data (sec);
3040 i_shdrp[d->this_idx] = &d->this_hdr;
3041 if (d->rel_idx != 0)
3042 i_shdrp[d->rel_idx] = &d->rel_hdr;
3043 if (d->rel_idx2 != 0)
3044 i_shdrp[d->rel_idx2] = d->rel_hdr2;
3046 /* Fill in the sh_link and sh_info fields while we're at it. */
3048 /* sh_link of a reloc section is the section index of the symbol
3049 table. sh_info is the section index of the section to which
3050 the relocation entries apply. */
3051 if (d->rel_idx != 0)
3053 d->rel_hdr.sh_link = t->symtab_section;
3054 d->rel_hdr.sh_info = d->this_idx;
3056 if (d->rel_idx2 != 0)
3058 d->rel_hdr2->sh_link = t->symtab_section;
3059 d->rel_hdr2->sh_info = d->this_idx;
3062 /* We need to set up sh_link for SHF_LINK_ORDER. */
3063 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3065 s = elf_linked_to_section (sec);
3067 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3070 struct bfd_link_order *p;
3072 /* Find out what the corresponding section in output
3074 for (p = sec->map_head.link_order; p != NULL; p = p->next)
3076 s = p->u.indirect.section;
3077 if (p->type == bfd_indirect_link_order
3078 && (bfd_get_flavour (s->owner)
3079 == bfd_target_elf_flavour))
3081 Elf_Internal_Shdr ** const elf_shdrp
3082 = elf_elfsections (s->owner);
3084 = _bfd_elf_section_from_bfd_section (s->owner, s);
3085 elfsec = elf_shdrp[elfsec]->sh_link;
3087 The Intel C compiler generates SHT_IA_64_UNWIND with
3088 SHF_LINK_ORDER. But it doesn't set the sh_link or
3089 sh_info fields. Hence we could get the situation
3090 where elfsec is 0. */
3093 const struct elf_backend_data *bed
3094 = get_elf_backend_data (abfd);
3095 if (bed->link_order_error_handler)
3096 bed->link_order_error_handler
3097 (_("%B: warning: sh_link not set for section `%A'"),
3102 s = elf_shdrp[elfsec]->bfd_section;
3103 if (elf_discarded_section (s))
3106 (*_bfd_error_handler)
3107 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3108 abfd, d->this_hdr.bfd_section,
3110 /* Point to the kept section if it has
3111 the same size as the discarded
3113 kept = _bfd_elf_check_kept_section (s);
3116 bfd_set_error (bfd_error_bad_value);
3121 s = s->output_section;
3122 BFD_ASSERT (s != NULL);
3123 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3131 switch (d->this_hdr.sh_type)
3135 /* A reloc section which we are treating as a normal BFD
3136 section. sh_link is the section index of the symbol
3137 table. sh_info is the section index of the section to
3138 which the relocation entries apply. We assume that an
3139 allocated reloc section uses the dynamic symbol table.
3140 FIXME: How can we be sure? */
3141 s = bfd_get_section_by_name (abfd, ".dynsym");
3143 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3145 /* We look up the section the relocs apply to by name. */
3147 if (d->this_hdr.sh_type == SHT_REL)
3151 s = bfd_get_section_by_name (abfd, name);
3153 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3157 /* We assume that a section named .stab*str is a stabs
3158 string section. We look for a section with the same name
3159 but without the trailing ``str'', and set its sh_link
3160 field to point to this section. */
3161 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
3162 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3167 len = strlen (sec->name);
3168 alc = bfd_malloc (len - 2);
3171 memcpy (alc, sec->name, len - 3);
3172 alc[len - 3] = '\0';
3173 s = bfd_get_section_by_name (abfd, alc);
3177 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3179 /* This is a .stab section. */
3180 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3181 elf_section_data (s)->this_hdr.sh_entsize
3182 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3189 case SHT_GNU_verneed:
3190 case SHT_GNU_verdef:
3191 /* sh_link is the section header index of the string table
3192 used for the dynamic entries, or the symbol table, or the
3194 s = bfd_get_section_by_name (abfd, ".dynstr");
3196 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3199 case SHT_GNU_LIBLIST:
3200 /* sh_link is the section header index of the prelink library
3202 used for the dynamic entries, or the symbol table, or the
3204 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3205 ? ".dynstr" : ".gnu.libstr");
3207 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3211 case SHT_GNU_versym:
3212 /* sh_link is the section header index of the symbol table
3213 this hash table or version table is for. */
3214 s = bfd_get_section_by_name (abfd, ".dynsym");
3216 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3220 d->this_hdr.sh_link = t->symtab_section;
3224 for (secn = 1; secn < section_number; ++secn)
3225 if (i_shdrp[secn] == NULL)
3226 i_shdrp[secn] = i_shdrp[0];
3228 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3229 i_shdrp[secn]->sh_name);
3233 /* Map symbol from it's internal number to the external number, moving
3234 all local symbols to be at the head of the list. */
3237 sym_is_global (bfd *abfd, asymbol *sym)
3239 /* If the backend has a special mapping, use it. */
3240 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3241 if (bed->elf_backend_sym_is_global)
3242 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3244 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3245 || bfd_is_und_section (bfd_get_section (sym))
3246 || bfd_is_com_section (bfd_get_section (sym)));
3250 elf_map_symbols (bfd *abfd)
3252 unsigned int symcount = bfd_get_symcount (abfd);
3253 asymbol **syms = bfd_get_outsymbols (abfd);
3254 asymbol **sect_syms;
3255 unsigned int num_locals = 0;
3256 unsigned int num_globals = 0;
3257 unsigned int num_locals2 = 0;
3258 unsigned int num_globals2 = 0;
3266 fprintf (stderr, "elf_map_symbols\n");
3270 for (asect = abfd->sections; asect; asect = asect->next)
3272 if (max_index < asect->index)
3273 max_index = asect->index;
3277 amt = max_index * sizeof (asymbol *);
3278 sect_syms = bfd_zalloc (abfd, amt);
3279 if (sect_syms == NULL)
3281 elf_section_syms (abfd) = sect_syms;
3282 elf_num_section_syms (abfd) = max_index;
3284 /* Init sect_syms entries for any section symbols we have already
3285 decided to output. */
3286 for (idx = 0; idx < symcount; idx++)
3288 asymbol *sym = syms[idx];
3290 if ((sym->flags & BSF_SECTION_SYM) != 0
3297 if (sec->owner != NULL)
3299 if (sec->owner != abfd)
3301 if (sec->output_offset != 0)
3304 sec = sec->output_section;
3306 /* Empty sections in the input files may have had a
3307 section symbol created for them. (See the comment
3308 near the end of _bfd_generic_link_output_symbols in
3309 linker.c). If the linker script discards such
3310 sections then we will reach this point. Since we know
3311 that we cannot avoid this case, we detect it and skip
3312 the abort and the assignment to the sect_syms array.
3313 To reproduce this particular case try running the
3314 linker testsuite test ld-scripts/weak.exp for an ELF
3315 port that uses the generic linker. */
3316 if (sec->owner == NULL)
3319 BFD_ASSERT (sec->owner == abfd);
3321 sect_syms[sec->index] = syms[idx];
3326 /* Classify all of the symbols. */
3327 for (idx = 0; idx < symcount; idx++)
3329 if (!sym_is_global (abfd, syms[idx]))
3335 /* We will be adding a section symbol for each BFD section. Most normal
3336 sections will already have a section symbol in outsymbols, but
3337 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3338 at least in that case. */
3339 for (asect = abfd->sections; asect; asect = asect->next)
3341 if (sect_syms[asect->index] == NULL)
3343 if (!sym_is_global (abfd, asect->symbol))
3350 /* Now sort the symbols so the local symbols are first. */
3351 amt = (num_locals + num_globals) * sizeof (asymbol *);
3352 new_syms = bfd_alloc (abfd, amt);
3354 if (new_syms == NULL)
3357 for (idx = 0; idx < symcount; idx++)
3359 asymbol *sym = syms[idx];
3362 if (!sym_is_global (abfd, sym))
3365 i = num_locals + num_globals2++;
3367 sym->udata.i = i + 1;
3369 for (asect = abfd->sections; asect; asect = asect->next)
3371 if (sect_syms[asect->index] == NULL)
3373 asymbol *sym = asect->symbol;
3376 sect_syms[asect->index] = sym;
3377 if (!sym_is_global (abfd, sym))
3380 i = num_locals + num_globals2++;
3382 sym->udata.i = i + 1;
3386 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3388 elf_num_locals (abfd) = num_locals;
3389 elf_num_globals (abfd) = num_globals;
3393 /* Align to the maximum file alignment that could be required for any
3394 ELF data structure. */
3396 static inline file_ptr
3397 align_file_position (file_ptr off, int align)
3399 return (off + align - 1) & ~(align - 1);
3402 /* Assign a file position to a section, optionally aligning to the
3403 required section alignment. */
3406 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3414 al = i_shdrp->sh_addralign;
3416 offset = BFD_ALIGN (offset, al);
3418 i_shdrp->sh_offset = offset;
3419 if (i_shdrp->bfd_section != NULL)
3420 i_shdrp->bfd_section->filepos = offset;
3421 if (i_shdrp->sh_type != SHT_NOBITS)
3422 offset += i_shdrp->sh_size;
3426 /* Compute the file positions we are going to put the sections at, and
3427 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3428 is not NULL, this is being called by the ELF backend linker. */
3431 _bfd_elf_compute_section_file_positions (bfd *abfd,
3432 struct bfd_link_info *link_info)
3434 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3436 struct bfd_strtab_hash *strtab = NULL;
3437 Elf_Internal_Shdr *shstrtab_hdr;
3439 if (abfd->output_has_begun)
3442 /* Do any elf backend specific processing first. */
3443 if (bed->elf_backend_begin_write_processing)
3444 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3446 if (! prep_headers (abfd))
3449 /* Post process the headers if necessary. */
3450 if (bed->elf_backend_post_process_headers)
3451 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3454 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3458 if (!assign_section_numbers (abfd, link_info))
3461 /* The backend linker builds symbol table information itself. */
3462 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3464 /* Non-zero if doing a relocatable link. */
3465 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3467 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3471 if (link_info == NULL)
3473 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3478 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3479 /* sh_name was set in prep_headers. */
3480 shstrtab_hdr->sh_type = SHT_STRTAB;
3481 shstrtab_hdr->sh_flags = 0;
3482 shstrtab_hdr->sh_addr = 0;
3483 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3484 shstrtab_hdr->sh_entsize = 0;
3485 shstrtab_hdr->sh_link = 0;
3486 shstrtab_hdr->sh_info = 0;
3487 /* sh_offset is set in assign_file_positions_except_relocs. */
3488 shstrtab_hdr->sh_addralign = 1;
3490 if (!assign_file_positions_except_relocs (abfd, link_info))
3493 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3496 Elf_Internal_Shdr *hdr;
3498 off = elf_tdata (abfd)->next_file_pos;
3500 hdr = &elf_tdata (abfd)->symtab_hdr;
3501 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3503 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3504 if (hdr->sh_size != 0)
3505 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3507 hdr = &elf_tdata (abfd)->strtab_hdr;
3508 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3510 elf_tdata (abfd)->next_file_pos = off;
3512 /* Now that we know where the .strtab section goes, write it
3514 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3515 || ! _bfd_stringtab_emit (abfd, strtab))
3517 _bfd_stringtab_free (strtab);
3520 abfd->output_has_begun = TRUE;
3525 /* Create a mapping from a set of sections to a program segment. */
3527 static struct elf_segment_map *
3528 make_mapping (bfd *abfd,
3529 asection **sections,
3534 struct elf_segment_map *m;
3539 amt = sizeof (struct elf_segment_map);
3540 amt += (to - from - 1) * sizeof (asection *);
3541 m = bfd_zalloc (abfd, amt);
3545 m->p_type = PT_LOAD;
3546 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3547 m->sections[i - from] = *hdrpp;
3548 m->count = to - from;
3550 if (from == 0 && phdr)
3552 /* Include the headers in the first PT_LOAD segment. */
3553 m->includes_filehdr = 1;
3554 m->includes_phdrs = 1;
3560 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3563 struct elf_segment_map *
3564 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3566 struct elf_segment_map *m;
3568 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3572 m->p_type = PT_DYNAMIC;
3574 m->sections[0] = dynsec;
3579 /* Set up a mapping from BFD sections to program segments. */
3582 map_sections_to_segments (bfd *abfd)
3584 asection **sections = NULL;
3588 struct elf_segment_map *mfirst;
3589 struct elf_segment_map **pm;
3590 struct elf_segment_map *m;
3593 unsigned int phdr_index;
3594 bfd_vma maxpagesize;
3596 bfd_boolean phdr_in_segment = TRUE;
3597 bfd_boolean writable;
3599 asection *first_tls = NULL;
3600 asection *dynsec, *eh_frame_hdr;
3603 if (elf_tdata (abfd)->segment_map != NULL)
3606 if (bfd_count_sections (abfd) == 0)
3609 /* Select the allocated sections, and sort them. */
3611 amt = bfd_count_sections (abfd) * sizeof (asection *);
3612 sections = bfd_malloc (amt);
3613 if (sections == NULL)
3617 for (s = abfd->sections; s != NULL; s = s->next)
3619 if ((s->flags & SEC_ALLOC) != 0)
3625 BFD_ASSERT (i <= bfd_count_sections (abfd));
3628 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3630 /* Build the mapping. */
3635 /* If we have a .interp section, then create a PT_PHDR segment for
3636 the program headers and a PT_INTERP segment for the .interp
3638 s = bfd_get_section_by_name (abfd, ".interp");
3639 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3641 amt = sizeof (struct elf_segment_map);
3642 m = bfd_zalloc (abfd, amt);
3646 m->p_type = PT_PHDR;
3647 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3648 m->p_flags = PF_R | PF_X;
3649 m->p_flags_valid = 1;
3650 m->includes_phdrs = 1;
3655 amt = sizeof (struct elf_segment_map);
3656 m = bfd_zalloc (abfd, amt);
3660 m->p_type = PT_INTERP;
3668 /* Look through the sections. We put sections in the same program
3669 segment when the start of the second section can be placed within
3670 a few bytes of the end of the first section. */
3674 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3676 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3678 && (dynsec->flags & SEC_LOAD) == 0)
3681 /* Deal with -Ttext or something similar such that the first section
3682 is not adjacent to the program headers. This is an
3683 approximation, since at this point we don't know exactly how many
3684 program headers we will need. */
3687 bfd_size_type phdr_size;
3689 phdr_size = elf_tdata (abfd)->program_header_size;
3691 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3692 if ((abfd->flags & D_PAGED) == 0
3693 || sections[0]->lma < phdr_size
3694 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3695 phdr_in_segment = FALSE;
3698 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3701 bfd_boolean new_segment;
3705 /* See if this section and the last one will fit in the same
3708 if (last_hdr == NULL)
3710 /* If we don't have a segment yet, then we don't need a new
3711 one (we build the last one after this loop). */
3712 new_segment = FALSE;
3714 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3716 /* If this section has a different relation between the
3717 virtual address and the load address, then we need a new
3721 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3722 < BFD_ALIGN (hdr->lma, maxpagesize))
3724 /* If putting this section in this segment would force us to
3725 skip a page in the segment, then we need a new segment. */
3728 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3729 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3731 /* We don't want to put a loadable section after a
3732 nonloadable section in the same segment.
3733 Consider .tbss sections as loadable for this purpose. */
3736 else if ((abfd->flags & D_PAGED) == 0)
3738 /* If the file is not demand paged, which means that we
3739 don't require the sections to be correctly aligned in the
3740 file, then there is no other reason for a new segment. */
3741 new_segment = FALSE;
3744 && (hdr->flags & SEC_READONLY) == 0
3745 && (((last_hdr->lma + last_size - 1)
3746 & ~(maxpagesize - 1))
3747 != (hdr->lma & ~(maxpagesize - 1))))
3749 /* We don't want to put a writable section in a read only
3750 segment, unless they are on the same page in memory
3751 anyhow. We already know that the last section does not
3752 bring us past the current section on the page, so the
3753 only case in which the new section is not on the same
3754 page as the previous section is when the previous section
3755 ends precisely on a page boundary. */
3760 /* Otherwise, we can use the same segment. */
3761 new_segment = FALSE;
3766 if ((hdr->flags & SEC_READONLY) == 0)
3769 /* .tbss sections effectively have zero size. */
3770 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3771 last_size = hdr->size;
3777 /* We need a new program segment. We must create a new program
3778 header holding all the sections from phdr_index until hdr. */
3780 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3787 if ((hdr->flags & SEC_READONLY) == 0)
3793 /* .tbss sections effectively have zero size. */
3794 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3795 last_size = hdr->size;
3799 phdr_in_segment = FALSE;
3802 /* Create a final PT_LOAD program segment. */
3803 if (last_hdr != NULL)
3805 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3813 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3816 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3823 /* For each loadable .note section, add a PT_NOTE segment. We don't
3824 use bfd_get_section_by_name, because if we link together
3825 nonloadable .note sections and loadable .note sections, we will
3826 generate two .note sections in the output file. FIXME: Using
3827 names for section types is bogus anyhow. */
3828 for (s = abfd->sections; s != NULL; s = s->next)
3830 if ((s->flags & SEC_LOAD) != 0
3831 && strncmp (s->name, ".note", 5) == 0)
3833 amt = sizeof (struct elf_segment_map);
3834 m = bfd_zalloc (abfd, amt);
3838 m->p_type = PT_NOTE;
3845 if (s->flags & SEC_THREAD_LOCAL)
3853 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3858 amt = sizeof (struct elf_segment_map);
3859 amt += (tls_count - 1) * sizeof (asection *);
3860 m = bfd_zalloc (abfd, amt);
3865 m->count = tls_count;
3866 /* Mandated PF_R. */
3868 m->p_flags_valid = 1;
3869 for (i = 0; i < tls_count; ++i)
3871 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3872 m->sections[i] = first_tls;
3873 first_tls = first_tls->next;
3880 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3882 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3883 if (eh_frame_hdr != NULL
3884 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3886 amt = sizeof (struct elf_segment_map);
3887 m = bfd_zalloc (abfd, amt);
3891 m->p_type = PT_GNU_EH_FRAME;
3893 m->sections[0] = eh_frame_hdr->output_section;
3899 if (elf_tdata (abfd)->stack_flags)
3901 amt = sizeof (struct elf_segment_map);
3902 m = bfd_zalloc (abfd, amt);
3906 m->p_type = PT_GNU_STACK;
3907 m->p_flags = elf_tdata (abfd)->stack_flags;
3908 m->p_flags_valid = 1;
3914 if (elf_tdata (abfd)->relro)
3916 amt = sizeof (struct elf_segment_map);
3917 m = bfd_zalloc (abfd, amt);
3921 m->p_type = PT_GNU_RELRO;
3923 m->p_flags_valid = 1;
3932 elf_tdata (abfd)->segment_map = mfirst;
3936 if (sections != NULL)
3941 /* Sort sections by address. */
3944 elf_sort_sections (const void *arg1, const void *arg2)
3946 const asection *sec1 = *(const asection **) arg1;
3947 const asection *sec2 = *(const asection **) arg2;
3948 bfd_size_type size1, size2;
3950 /* Sort by LMA first, since this is the address used to
3951 place the section into a segment. */
3952 if (sec1->lma < sec2->lma)
3954 else if (sec1->lma > sec2->lma)
3957 /* Then sort by VMA. Normally the LMA and the VMA will be
3958 the same, and this will do nothing. */
3959 if (sec1->vma < sec2->vma)
3961 else if (sec1->vma > sec2->vma)
3964 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3966 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3972 /* If the indicies are the same, do not return 0
3973 here, but continue to try the next comparison. */
3974 if (sec1->target_index - sec2->target_index != 0)
3975 return sec1->target_index - sec2->target_index;
3980 else if (TOEND (sec2))
3985 /* Sort by size, to put zero sized sections
3986 before others at the same address. */
3988 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
3989 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
3996 return sec1->target_index - sec2->target_index;
3999 /* Ian Lance Taylor writes:
4001 We shouldn't be using % with a negative signed number. That's just
4002 not good. We have to make sure either that the number is not
4003 negative, or that the number has an unsigned type. When the types
4004 are all the same size they wind up as unsigned. When file_ptr is a
4005 larger signed type, the arithmetic winds up as signed long long,
4008 What we're trying to say here is something like ``increase OFF by
4009 the least amount that will cause it to be equal to the VMA modulo
4011 /* In other words, something like:
4013 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4014 off_offset = off % bed->maxpagesize;
4015 if (vma_offset < off_offset)
4016 adjustment = vma_offset + bed->maxpagesize - off_offset;
4018 adjustment = vma_offset - off_offset;
4020 which can can be collapsed into the expression below. */
4023 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4025 return ((vma - off) % maxpagesize);
4028 /* Assign file positions to the sections based on the mapping from
4029 sections to segments. This function also sets up some fields in
4030 the file header, and writes out the program headers. */
4033 assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
4035 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4037 struct elf_segment_map *m;
4039 Elf_Internal_Phdr *phdrs;
4041 bfd_vma filehdr_vaddr, filehdr_paddr;
4042 bfd_vma phdrs_vaddr, phdrs_paddr;
4043 Elf_Internal_Phdr *p;
4046 if (elf_tdata (abfd)->segment_map == NULL)
4048 if (! map_sections_to_segments (abfd))
4053 /* The placement algorithm assumes that non allocated sections are
4054 not in PT_LOAD segments. We ensure this here by removing such
4055 sections from the segment map. */
4056 for (m = elf_tdata (abfd)->segment_map;
4060 unsigned int new_count;
4063 if (m->p_type != PT_LOAD)
4067 for (i = 0; i < m->count; i ++)
4069 if ((m->sections[i]->flags & SEC_ALLOC) != 0)
4072 m->sections[new_count] = m->sections[i];
4078 if (new_count != m->count)
4079 m->count = new_count;
4083 if (bed->elf_backend_modify_segment_map)
4085 if (! (*bed->elf_backend_modify_segment_map) (abfd, link_info))
4090 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4093 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4094 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4095 elf_elfheader (abfd)->e_phnum = count;
4099 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4103 /* If we already counted the number of program segments, make sure
4104 that we allocated enough space. This happens when SIZEOF_HEADERS
4105 is used in a linker script. */
4106 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
4107 if (alloc != 0 && count > alloc)
4109 ((*_bfd_error_handler)
4110 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
4111 abfd, alloc, count));
4112 bfd_set_error (bfd_error_bad_value);
4119 amt = alloc * sizeof (Elf_Internal_Phdr);
4120 phdrs = bfd_alloc (abfd, amt);
4124 off = bed->s->sizeof_ehdr;
4125 off += alloc * bed->s->sizeof_phdr;
4132 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4139 /* If elf_segment_map is not from map_sections_to_segments, the
4140 sections may not be correctly ordered. NOTE: sorting should
4141 not be done to the PT_NOTE section of a corefile, which may
4142 contain several pseudo-sections artificially created by bfd.
4143 Sorting these pseudo-sections breaks things badly. */
4145 && !(elf_elfheader (abfd)->e_type == ET_CORE
4146 && m->p_type == PT_NOTE))
4147 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4150 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4151 number of sections with contents contributing to both p_filesz
4152 and p_memsz, followed by a number of sections with no contents
4153 that just contribute to p_memsz. In this loop, OFF tracks next
4154 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
4155 an adjustment we use for segments that have no file contents
4156 but need zero filled memory allocation. */
4158 p->p_type = m->p_type;
4159 p->p_flags = m->p_flags;
4161 if (p->p_type == PT_LOAD
4164 bfd_size_type align;
4167 if ((abfd->flags & D_PAGED) != 0)
4168 align = bed->maxpagesize;
4171 unsigned int align_power = 0;
4172 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4174 unsigned int secalign;
4176 secalign = bfd_get_section_alignment (abfd, *secpp);
4177 if (secalign > align_power)
4178 align_power = secalign;
4180 align = (bfd_size_type) 1 << align_power;
4183 adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4186 && !m->includes_filehdr
4187 && !m->includes_phdrs
4188 && (ufile_ptr) off >= align)
4190 /* If the first section isn't loadable, the same holds for
4191 any other sections. Since the segment won't need file
4192 space, we can make p_offset overlap some prior segment.
4193 However, .tbss is special. If a segment starts with
4194 .tbss, we need to look at the next section to decide
4195 whether the segment has any loadable sections. */
4197 while ((m->sections[i]->flags & SEC_LOAD) == 0)
4199 if ((m->sections[i]->flags & SEC_THREAD_LOCAL) == 0
4203 voff = adjust - align;
4209 /* Make sure the .dynamic section is the first section in the
4210 PT_DYNAMIC segment. */
4211 else if (p->p_type == PT_DYNAMIC
4213 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4216 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4218 bfd_set_error (bfd_error_bad_value);
4225 p->p_vaddr = m->sections[0]->vma;
4227 if (m->p_paddr_valid)
4228 p->p_paddr = m->p_paddr;
4229 else if (m->count == 0)
4232 p->p_paddr = m->sections[0]->lma;
4234 if (p->p_type == PT_LOAD
4235 && (abfd->flags & D_PAGED) != 0)
4236 p->p_align = bed->maxpagesize;
4237 else if (m->count == 0)
4238 p->p_align = 1 << bed->s->log_file_align;
4246 if (m->includes_filehdr)
4248 if (! m->p_flags_valid)
4251 p->p_filesz = bed->s->sizeof_ehdr;
4252 p->p_memsz = bed->s->sizeof_ehdr;
4255 BFD_ASSERT (p->p_type == PT_LOAD);
4257 if (p->p_vaddr < (bfd_vma) off)
4259 (*_bfd_error_handler)
4260 (_("%B: Not enough room for program headers, try linking with -N"),
4262 bfd_set_error (bfd_error_bad_value);
4267 if (! m->p_paddr_valid)
4270 if (p->p_type == PT_LOAD)
4272 filehdr_vaddr = p->p_vaddr;
4273 filehdr_paddr = p->p_paddr;
4277 if (m->includes_phdrs)
4279 if (! m->p_flags_valid)
4282 if (m->includes_filehdr)
4284 if (p->p_type == PT_LOAD)
4286 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
4287 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
4292 p->p_offset = bed->s->sizeof_ehdr;
4296 BFD_ASSERT (p->p_type == PT_LOAD);
4297 p->p_vaddr -= off - p->p_offset;
4298 if (! m->p_paddr_valid)
4299 p->p_paddr -= off - p->p_offset;
4302 if (p->p_type == PT_LOAD)
4304 phdrs_vaddr = p->p_vaddr;
4305 phdrs_paddr = p->p_paddr;
4308 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4311 p->p_filesz += alloc * bed->s->sizeof_phdr;
4312 p->p_memsz += alloc * bed->s->sizeof_phdr;
4315 if (p->p_type == PT_LOAD
4316 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4318 if (! m->includes_filehdr && ! m->includes_phdrs)
4319 p->p_offset = off + voff;
4324 adjust = off - (p->p_offset + p->p_filesz);
4325 p->p_filesz += adjust;
4326 p->p_memsz += adjust;
4330 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4334 bfd_size_type align;
4338 align = 1 << bfd_get_section_alignment (abfd, sec);
4340 if (p->p_type == PT_LOAD
4341 || p->p_type == PT_TLS)
4343 bfd_signed_vma adjust;
4345 if ((flags & SEC_LOAD) != 0)
4347 adjust = sec->lma - (p->p_paddr + p->p_filesz);
4350 (*_bfd_error_handler)
4351 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4352 abfd, sec, (unsigned long) sec->lma);
4356 p->p_filesz += adjust;
4357 p->p_memsz += adjust;
4359 /* .tbss is special. It doesn't contribute to p_memsz of
4361 else if ((flags & SEC_THREAD_LOCAL) == 0
4362 || p->p_type == PT_TLS)
4364 /* The section VMA must equal the file position
4365 modulo the page size. */
4366 bfd_size_type page = align;
4367 if ((abfd->flags & D_PAGED) != 0)
4368 page = bed->maxpagesize;
4369 adjust = vma_page_aligned_bias (sec->vma,
4370 p->p_vaddr + p->p_memsz,
4372 p->p_memsz += adjust;
4376 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4378 /* The section at i == 0 is the one that actually contains
4384 p->p_filesz = sec->size;
4390 /* The rest are fake sections that shouldn't be written. */
4399 if (p->p_type == PT_LOAD)
4402 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4403 1997, and the exact reason for it isn't clear. One
4404 plausible explanation is that it is to work around
4405 a problem we have with linker scripts using data
4406 statements in NOLOAD sections. I don't think it
4407 makes a great deal of sense to have such a section
4408 assigned to a PT_LOAD segment, but apparently
4409 people do this. The data statement results in a
4410 bfd_data_link_order being built, and these need
4411 section contents to write into. Eventually, we get
4412 to _bfd_elf_write_object_contents which writes any
4413 section with contents to the output. Make room
4414 here for the write, so that following segments are
4416 if ((flags & SEC_LOAD) != 0
4417 || (flags & SEC_HAS_CONTENTS) != 0)
4421 if ((flags & SEC_LOAD) != 0)
4423 p->p_filesz += sec->size;
4424 p->p_memsz += sec->size;
4426 /* PR ld/594: Sections in note segments which are not loaded
4427 contribute to the file size but not the in-memory size. */
4428 else if (p->p_type == PT_NOTE
4429 && (flags & SEC_HAS_CONTENTS) != 0)
4430 p->p_filesz += sec->size;
4432 /* .tbss is special. It doesn't contribute to p_memsz of
4434 else if ((flags & SEC_THREAD_LOCAL) == 0
4435 || p->p_type == PT_TLS)
4436 p->p_memsz += sec->size;
4438 if (p->p_type == PT_TLS
4440 && (sec->flags & SEC_HAS_CONTENTS) == 0)
4442 struct bfd_link_order *o;
4443 bfd_vma tbss_size = 0;
4445 for (o = sec->map_head.link_order; o != NULL; o = o->next)
4446 if (tbss_size < o->offset + o->size)
4447 tbss_size = o->offset + o->size;
4449 p->p_memsz += tbss_size;
4452 if (align > p->p_align
4453 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
4457 if (! m->p_flags_valid)
4460 if ((flags & SEC_CODE) != 0)
4462 if ((flags & SEC_READONLY) == 0)
4468 /* Now that we have set the section file positions, we can set up
4469 the file positions for the non PT_LOAD segments. */
4470 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4474 if (p->p_type != PT_LOAD && m->count > 0)
4476 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
4477 /* If the section has not yet been assigned a file position,
4478 do so now. The ARM BPABI requires that .dynamic section
4479 not be marked SEC_ALLOC because it is not part of any
4480 PT_LOAD segment, so it will not be processed above. */
4481 if (p->p_type == PT_DYNAMIC && m->sections[0]->filepos == 0)
4484 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4487 while (i_shdrpp[i]->bfd_section != m->sections[0])
4489 off = (_bfd_elf_assign_file_position_for_section
4490 (i_shdrpp[i], off, TRUE));
4491 p->p_filesz = m->sections[0]->size;
4493 p->p_offset = m->sections[0]->filepos;
4497 if (m->includes_filehdr)
4499 p->p_vaddr = filehdr_vaddr;
4500 if (! m->p_paddr_valid)
4501 p->p_paddr = filehdr_paddr;
4503 else if (m->includes_phdrs)
4505 p->p_vaddr = phdrs_vaddr;
4506 if (! m->p_paddr_valid)
4507 p->p_paddr = phdrs_paddr;
4509 else if (p->p_type == PT_GNU_RELRO)
4511 Elf_Internal_Phdr *lp;
4513 for (lp = phdrs; lp < phdrs + count; ++lp)
4515 if (lp->p_type == PT_LOAD
4516 && lp->p_vaddr <= link_info->relro_end
4517 && lp->p_vaddr >= link_info->relro_start
4518 && lp->p_vaddr + lp->p_filesz
4519 >= link_info->relro_end)
4523 if (lp < phdrs + count
4524 && link_info->relro_end > lp->p_vaddr)
4526 p->p_vaddr = lp->p_vaddr;
4527 p->p_paddr = lp->p_paddr;
4528 p->p_offset = lp->p_offset;
4529 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4530 p->p_memsz = p->p_filesz;
4532 p->p_flags = (lp->p_flags & ~PF_W);
4536 memset (p, 0, sizeof *p);
4537 p->p_type = PT_NULL;
4543 /* Clear out any program headers we allocated but did not use. */
4544 for (; count < alloc; count++, p++)
4546 memset (p, 0, sizeof *p);
4547 p->p_type = PT_NULL;
4550 elf_tdata (abfd)->phdr = phdrs;
4552 elf_tdata (abfd)->next_file_pos = off;
4554 /* Write out the program headers. */
4555 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4556 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
4562 /* Get the size of the program header.
4564 If this is called by the linker before any of the section VMA's are set, it
4565 can't calculate the correct value for a strange memory layout. This only
4566 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4567 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4568 data segment (exclusive of .interp and .dynamic).
4570 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4571 will be two segments. */
4573 static bfd_size_type
4574 get_program_header_size (bfd *abfd)
4578 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4580 /* We can't return a different result each time we're called. */
4581 if (elf_tdata (abfd)->program_header_size != 0)
4582 return elf_tdata (abfd)->program_header_size;
4584 if (elf_tdata (abfd)->segment_map != NULL)
4586 struct elf_segment_map *m;
4589 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4591 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4592 return elf_tdata (abfd)->program_header_size;
4595 /* Assume we will need exactly two PT_LOAD segments: one for text
4596 and one for data. */
4599 s = bfd_get_section_by_name (abfd, ".interp");
4600 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4602 /* If we have a loadable interpreter section, we need a
4603 PT_INTERP segment. In this case, assume we also need a
4604 PT_PHDR segment, although that may not be true for all
4609 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4611 /* We need a PT_DYNAMIC segment. */
4615 if (elf_tdata (abfd)->eh_frame_hdr)
4617 /* We need a PT_GNU_EH_FRAME segment. */
4621 if (elf_tdata (abfd)->stack_flags)
4623 /* We need a PT_GNU_STACK segment. */
4627 if (elf_tdata (abfd)->relro)
4629 /* We need a PT_GNU_RELRO segment. */
4633 for (s = abfd->sections; s != NULL; s = s->next)
4635 if ((s->flags & SEC_LOAD) != 0
4636 && strncmp (s->name, ".note", 5) == 0)
4638 /* We need a PT_NOTE segment. */
4643 for (s = abfd->sections; s != NULL; s = s->next)
4645 if (s->flags & SEC_THREAD_LOCAL)
4647 /* We need a PT_TLS segment. */
4653 /* Let the backend count up any program headers it might need. */
4654 if (bed->elf_backend_additional_program_headers)
4658 a = (*bed->elf_backend_additional_program_headers) (abfd);
4664 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4665 return elf_tdata (abfd)->program_header_size;
4668 /* Work out the file positions of all the sections. This is called by
4669 _bfd_elf_compute_section_file_positions. All the section sizes and
4670 VMAs must be known before this is called.
4672 Reloc sections come in two flavours: Those processed specially as
4673 "side-channel" data attached to a section to which they apply, and
4674 those that bfd doesn't process as relocations. The latter sort are
4675 stored in a normal bfd section by bfd_section_from_shdr. We don't
4676 consider the former sort here, unless they form part of the loadable
4677 image. Reloc sections not assigned here will be handled later by
4678 assign_file_positions_for_relocs.
4680 We also don't set the positions of the .symtab and .strtab here. */
4683 assign_file_positions_except_relocs (bfd *abfd,
4684 struct bfd_link_info *link_info)
4686 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4687 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4688 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4689 unsigned int num_sec = elf_numsections (abfd);
4691 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4693 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4694 && bfd_get_format (abfd) != bfd_core)
4696 Elf_Internal_Shdr **hdrpp;
4699 /* Start after the ELF header. */
4700 off = i_ehdrp->e_ehsize;
4702 /* We are not creating an executable, which means that we are
4703 not creating a program header, and that the actual order of
4704 the sections in the file is unimportant. */
4705 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4707 Elf_Internal_Shdr *hdr;
4710 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4711 && hdr->bfd_section == NULL)
4712 || i == tdata->symtab_section
4713 || i == tdata->symtab_shndx_section
4714 || i == tdata->strtab_section)
4716 hdr->sh_offset = -1;
4719 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4721 if (i == SHN_LORESERVE - 1)
4723 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4724 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4731 Elf_Internal_Shdr **hdrpp;
4733 /* Assign file positions for the loaded sections based on the
4734 assignment of sections to segments. */
4735 if (! assign_file_positions_for_segments (abfd, link_info))
4738 /* Assign file positions for the other sections. */
4740 off = elf_tdata (abfd)->next_file_pos;
4741 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4743 Elf_Internal_Shdr *hdr;
4746 if (hdr->bfd_section != NULL
4747 && hdr->bfd_section->filepos != 0)
4748 hdr->sh_offset = hdr->bfd_section->filepos;
4749 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4751 ((*_bfd_error_handler)
4752 (_("%B: warning: allocated section `%s' not in segment"),
4754 (hdr->bfd_section == NULL
4756 : hdr->bfd_section->name)));
4757 if ((abfd->flags & D_PAGED) != 0)
4758 off += vma_page_aligned_bias (hdr->sh_addr, off,
4761 off += vma_page_aligned_bias (hdr->sh_addr, off,
4763 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4766 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4767 && hdr->bfd_section == NULL)
4768 || hdr == i_shdrpp[tdata->symtab_section]
4769 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4770 || hdr == i_shdrpp[tdata->strtab_section])
4771 hdr->sh_offset = -1;
4773 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4775 if (i == SHN_LORESERVE - 1)
4777 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4778 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4783 /* Place the section headers. */
4784 off = align_file_position (off, 1 << bed->s->log_file_align);
4785 i_ehdrp->e_shoff = off;
4786 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4788 elf_tdata (abfd)->next_file_pos = off;
4794 prep_headers (bfd *abfd)
4796 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4797 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4798 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4799 struct elf_strtab_hash *shstrtab;
4800 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4802 i_ehdrp = elf_elfheader (abfd);
4803 i_shdrp = elf_elfsections (abfd);
4805 shstrtab = _bfd_elf_strtab_init ();
4806 if (shstrtab == NULL)
4809 elf_shstrtab (abfd) = shstrtab;
4811 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4812 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4813 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4814 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4816 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4817 i_ehdrp->e_ident[EI_DATA] =
4818 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4819 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4821 if ((abfd->flags & DYNAMIC) != 0)
4822 i_ehdrp->e_type = ET_DYN;
4823 else if ((abfd->flags & EXEC_P) != 0)
4824 i_ehdrp->e_type = ET_EXEC;
4825 else if (bfd_get_format (abfd) == bfd_core)
4826 i_ehdrp->e_type = ET_CORE;
4828 i_ehdrp->e_type = ET_REL;
4830 switch (bfd_get_arch (abfd))
4832 case bfd_arch_unknown:
4833 i_ehdrp->e_machine = EM_NONE;
4836 /* There used to be a long list of cases here, each one setting
4837 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4838 in the corresponding bfd definition. To avoid duplication,
4839 the switch was removed. Machines that need special handling
4840 can generally do it in elf_backend_final_write_processing(),
4841 unless they need the information earlier than the final write.
4842 Such need can generally be supplied by replacing the tests for
4843 e_machine with the conditions used to determine it. */
4845 i_ehdrp->e_machine = bed->elf_machine_code;
4848 i_ehdrp->e_version = bed->s->ev_current;
4849 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4851 /* No program header, for now. */
4852 i_ehdrp->e_phoff = 0;
4853 i_ehdrp->e_phentsize = 0;
4854 i_ehdrp->e_phnum = 0;
4856 /* Each bfd section is section header entry. */
4857 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4858 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4860 /* If we're building an executable, we'll need a program header table. */
4861 if (abfd->flags & EXEC_P)
4862 /* It all happens later. */
4866 i_ehdrp->e_phentsize = 0;
4868 i_ehdrp->e_phoff = 0;
4871 elf_tdata (abfd)->symtab_hdr.sh_name =
4872 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4873 elf_tdata (abfd)->strtab_hdr.sh_name =
4874 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4875 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4876 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4877 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4878 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4879 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4885 /* Assign file positions for all the reloc sections which are not part
4886 of the loadable file image. */
4889 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4892 unsigned int i, num_sec;
4893 Elf_Internal_Shdr **shdrpp;
4895 off = elf_tdata (abfd)->next_file_pos;
4897 num_sec = elf_numsections (abfd);
4898 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4900 Elf_Internal_Shdr *shdrp;
4903 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4904 && shdrp->sh_offset == -1)
4905 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4908 elf_tdata (abfd)->next_file_pos = off;
4912 _bfd_elf_write_object_contents (bfd *abfd)
4914 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4915 Elf_Internal_Ehdr *i_ehdrp;
4916 Elf_Internal_Shdr **i_shdrp;
4918 unsigned int count, num_sec;
4920 if (! abfd->output_has_begun
4921 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4924 i_shdrp = elf_elfsections (abfd);
4925 i_ehdrp = elf_elfheader (abfd);
4928 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4932 _bfd_elf_assign_file_positions_for_relocs (abfd);
4934 /* After writing the headers, we need to write the sections too... */
4935 num_sec = elf_numsections (abfd);
4936 for (count = 1; count < num_sec; count++)
4938 if (bed->elf_backend_section_processing)
4939 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4940 if (i_shdrp[count]->contents)
4942 bfd_size_type amt = i_shdrp[count]->sh_size;
4944 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4945 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4948 if (count == SHN_LORESERVE - 1)
4949 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4952 /* Write out the section header names. */
4953 if (elf_shstrtab (abfd) != NULL
4954 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4955 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
4958 if (bed->elf_backend_final_write_processing)
4959 (*bed->elf_backend_final_write_processing) (abfd,
4960 elf_tdata (abfd)->linker);
4962 return bed->s->write_shdrs_and_ehdr (abfd);
4966 _bfd_elf_write_corefile_contents (bfd *abfd)
4968 /* Hopefully this can be done just like an object file. */
4969 return _bfd_elf_write_object_contents (abfd);
4972 /* Given a section, search the header to find them. */
4975 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4977 const struct elf_backend_data *bed;
4980 if (elf_section_data (asect) != NULL
4981 && elf_section_data (asect)->this_idx != 0)
4982 return elf_section_data (asect)->this_idx;
4984 if (bfd_is_abs_section (asect))
4986 else if (bfd_is_com_section (asect))
4988 else if (bfd_is_und_section (asect))
4993 bed = get_elf_backend_data (abfd);
4994 if (bed->elf_backend_section_from_bfd_section)
4998 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
5003 bfd_set_error (bfd_error_nonrepresentable_section);
5008 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5012 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5014 asymbol *asym_ptr = *asym_ptr_ptr;
5016 flagword flags = asym_ptr->flags;
5018 /* When gas creates relocations against local labels, it creates its
5019 own symbol for the section, but does put the symbol into the
5020 symbol chain, so udata is 0. When the linker is generating
5021 relocatable output, this section symbol may be for one of the
5022 input sections rather than the output section. */
5023 if (asym_ptr->udata.i == 0
5024 && (flags & BSF_SECTION_SYM)
5025 && asym_ptr->section)
5029 if (asym_ptr->section->output_section != NULL)
5030 indx = asym_ptr->section->output_section->index;
5032 indx = asym_ptr->section->index;
5033 if (indx < elf_num_section_syms (abfd)
5034 && elf_section_syms (abfd)[indx] != NULL)
5035 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5038 idx = asym_ptr->udata.i;
5042 /* This case can occur when using --strip-symbol on a symbol
5043 which is used in a relocation entry. */
5044 (*_bfd_error_handler)
5045 (_("%B: symbol `%s' required but not present"),
5046 abfd, bfd_asymbol_name (asym_ptr));
5047 bfd_set_error (bfd_error_no_symbols);
5054 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5055 (long) asym_ptr, asym_ptr->name, idx, flags,
5056 elf_symbol_flags (flags));
5064 /* Copy private BFD data. This copies any program header information. */
5067 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5069 Elf_Internal_Ehdr *iehdr;
5070 struct elf_segment_map *map;
5071 struct elf_segment_map *map_first;
5072 struct elf_segment_map **pointer_to_map;
5073 Elf_Internal_Phdr *segment;
5076 unsigned int num_segments;
5077 bfd_boolean phdr_included = FALSE;
5078 bfd_vma maxpagesize;
5079 struct elf_segment_map *phdr_adjust_seg = NULL;
5080 unsigned int phdr_adjust_num = 0;
5081 const struct elf_backend_data *bed;
5083 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5084 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5087 if (elf_tdata (ibfd)->phdr == NULL)
5090 bed = get_elf_backend_data (ibfd);
5091 iehdr = elf_elfheader (ibfd);
5094 pointer_to_map = &map_first;
5096 num_segments = elf_elfheader (ibfd)->e_phnum;
5097 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5099 /* Returns the end address of the segment + 1. */
5100 #define SEGMENT_END(segment, start) \
5101 (start + (segment->p_memsz > segment->p_filesz \
5102 ? segment->p_memsz : segment->p_filesz))
5104 #define SECTION_SIZE(section, segment) \
5105 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5106 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5107 ? section->size : 0)
5109 /* Returns TRUE if the given section is contained within
5110 the given segment. VMA addresses are compared. */
5111 #define IS_CONTAINED_BY_VMA(section, segment) \
5112 (section->vma >= segment->p_vaddr \
5113 && (section->vma + SECTION_SIZE (section, segment) \
5114 <= (SEGMENT_END (segment, segment->p_vaddr))))
5116 /* Returns TRUE if the given section is contained within
5117 the given segment. LMA addresses are compared. */
5118 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5119 (section->lma >= base \
5120 && (section->lma + SECTION_SIZE (section, segment) \
5121 <= SEGMENT_END (segment, base)))
5123 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5124 #define IS_COREFILE_NOTE(p, s) \
5125 (p->p_type == PT_NOTE \
5126 && bfd_get_format (ibfd) == bfd_core \
5127 && s->vma == 0 && s->lma == 0 \
5128 && (bfd_vma) s->filepos >= p->p_offset \
5129 && ((bfd_vma) s->filepos + s->size \
5130 <= p->p_offset + p->p_filesz))
5132 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5133 linker, which generates a PT_INTERP section with p_vaddr and
5134 p_memsz set to 0. */
5135 #define IS_SOLARIS_PT_INTERP(p, s) \
5137 && p->p_paddr == 0 \
5138 && p->p_memsz == 0 \
5139 && p->p_filesz > 0 \
5140 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5142 && (bfd_vma) s->filepos >= p->p_offset \
5143 && ((bfd_vma) s->filepos + s->size \
5144 <= p->p_offset + p->p_filesz))
5146 /* Decide if the given section should be included in the given segment.
5147 A section will be included if:
5148 1. It is within the address space of the segment -- we use the LMA
5149 if that is set for the segment and the VMA otherwise,
5150 2. It is an allocated segment,
5151 3. There is an output section associated with it,
5152 4. The section has not already been allocated to a previous segment.
5153 5. PT_GNU_STACK segments do not include any sections.
5154 6. PT_TLS segment includes only SHF_TLS sections.
5155 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5156 8. PT_DYNAMIC should not contain empty sections at the beginning
5157 (with the possible exception of .dynamic). */
5158 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5159 ((((segment->p_paddr \
5160 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5161 : IS_CONTAINED_BY_VMA (section, segment)) \
5162 && (section->flags & SEC_ALLOC) != 0) \
5163 || IS_COREFILE_NOTE (segment, section)) \
5164 && section->output_section != NULL \
5165 && segment->p_type != PT_GNU_STACK \
5166 && (segment->p_type != PT_TLS \
5167 || (section->flags & SEC_THREAD_LOCAL)) \
5168 && (segment->p_type == PT_LOAD \
5169 || segment->p_type == PT_TLS \
5170 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5171 && (segment->p_type != PT_DYNAMIC \
5172 || SECTION_SIZE (section, segment) > 0 \
5173 || (segment->p_paddr \
5174 ? segment->p_paddr != section->lma \
5175 : segment->p_vaddr != section->vma) \
5176 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5178 && ! section->segment_mark)
5180 /* Returns TRUE iff seg1 starts after the end of seg2. */
5181 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5182 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5184 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5185 their VMA address ranges and their LMA address ranges overlap.
5186 It is possible to have overlapping VMA ranges without overlapping LMA
5187 ranges. RedBoot images for example can have both .data and .bss mapped
5188 to the same VMA range, but with the .data section mapped to a different
5190 #define SEGMENT_OVERLAPS(seg1, seg2) \
5191 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5192 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5193 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5194 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5196 /* Initialise the segment mark field. */
5197 for (section = ibfd->sections; section != NULL; section = section->next)
5198 section->segment_mark = FALSE;
5200 /* Scan through the segments specified in the program header
5201 of the input BFD. For this first scan we look for overlaps
5202 in the loadable segments. These can be created by weird
5203 parameters to objcopy. Also, fix some solaris weirdness. */
5204 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5209 Elf_Internal_Phdr *segment2;
5211 if (segment->p_type == PT_INTERP)
5212 for (section = ibfd->sections; section; section = section->next)
5213 if (IS_SOLARIS_PT_INTERP (segment, section))
5215 /* Mininal change so that the normal section to segment
5216 assignment code will work. */
5217 segment->p_vaddr = section->vma;
5221 if (segment->p_type != PT_LOAD)
5224 /* Determine if this segment overlaps any previous segments. */
5225 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
5227 bfd_signed_vma extra_length;
5229 if (segment2->p_type != PT_LOAD
5230 || ! SEGMENT_OVERLAPS (segment, segment2))
5233 /* Merge the two segments together. */
5234 if (segment2->p_vaddr < segment->p_vaddr)
5236 /* Extend SEGMENT2 to include SEGMENT and then delete
5239 SEGMENT_END (segment, segment->p_vaddr)
5240 - SEGMENT_END (segment2, segment2->p_vaddr);
5242 if (extra_length > 0)
5244 segment2->p_memsz += extra_length;
5245 segment2->p_filesz += extra_length;
5248 segment->p_type = PT_NULL;
5250 /* Since we have deleted P we must restart the outer loop. */
5252 segment = elf_tdata (ibfd)->phdr;
5257 /* Extend SEGMENT to include SEGMENT2 and then delete
5260 SEGMENT_END (segment2, segment2->p_vaddr)
5261 - SEGMENT_END (segment, segment->p_vaddr);
5263 if (extra_length > 0)
5265 segment->p_memsz += extra_length;
5266 segment->p_filesz += extra_length;
5269 segment2->p_type = PT_NULL;
5274 /* The second scan attempts to assign sections to segments. */
5275 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5279 unsigned int section_count;
5280 asection ** sections;
5281 asection * output_section;
5283 bfd_vma matching_lma;
5284 bfd_vma suggested_lma;
5288 if (segment->p_type == PT_NULL)
5291 /* Compute how many sections might be placed into this segment. */
5292 for (section = ibfd->sections, section_count = 0;
5294 section = section->next)
5295 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5298 /* Allocate a segment map big enough to contain
5299 all of the sections we have selected. */
5300 amt = sizeof (struct elf_segment_map);
5301 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5302 map = bfd_alloc (obfd, amt);
5306 /* Initialise the fields of the segment map. Default to
5307 using the physical address of the segment in the input BFD. */
5309 map->p_type = segment->p_type;
5310 map->p_flags = segment->p_flags;
5311 map->p_flags_valid = 1;
5312 map->p_paddr = segment->p_paddr;
5313 map->p_paddr_valid = 1;
5315 /* Determine if this segment contains the ELF file header
5316 and if it contains the program headers themselves. */
5317 map->includes_filehdr = (segment->p_offset == 0
5318 && segment->p_filesz >= iehdr->e_ehsize);
5320 map->includes_phdrs = 0;
5322 if (! phdr_included || segment->p_type != PT_LOAD)
5324 map->includes_phdrs =
5325 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5326 && (segment->p_offset + segment->p_filesz
5327 >= ((bfd_vma) iehdr->e_phoff
5328 + iehdr->e_phnum * iehdr->e_phentsize)));
5330 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5331 phdr_included = TRUE;
5334 if (section_count == 0)
5336 /* Special segments, such as the PT_PHDR segment, may contain
5337 no sections, but ordinary, loadable segments should contain
5338 something. They are allowed by the ELF spec however, so only
5339 a warning is produced. */
5340 if (segment->p_type == PT_LOAD)
5341 (*_bfd_error_handler)
5342 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5346 *pointer_to_map = map;
5347 pointer_to_map = &map->next;
5352 /* Now scan the sections in the input BFD again and attempt
5353 to add their corresponding output sections to the segment map.
5354 The problem here is how to handle an output section which has
5355 been moved (ie had its LMA changed). There are four possibilities:
5357 1. None of the sections have been moved.
5358 In this case we can continue to use the segment LMA from the
5361 2. All of the sections have been moved by the same amount.
5362 In this case we can change the segment's LMA to match the LMA
5363 of the first section.
5365 3. Some of the sections have been moved, others have not.
5366 In this case those sections which have not been moved can be
5367 placed in the current segment which will have to have its size,
5368 and possibly its LMA changed, and a new segment or segments will
5369 have to be created to contain the other sections.
5371 4. The sections have been moved, but not by the same amount.
5372 In this case we can change the segment's LMA to match the LMA
5373 of the first section and we will have to create a new segment
5374 or segments to contain the other sections.
5376 In order to save time, we allocate an array to hold the section
5377 pointers that we are interested in. As these sections get assigned
5378 to a segment, they are removed from this array. */
5380 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5381 to work around this long long bug. */
5382 amt = section_count * sizeof (asection *);
5383 sections = bfd_malloc (amt);
5384 if (sections == NULL)
5387 /* Step One: Scan for segment vs section LMA conflicts.
5388 Also add the sections to the section array allocated above.
5389 Also add the sections to the current segment. In the common
5390 case, where the sections have not been moved, this means that
5391 we have completely filled the segment, and there is nothing
5397 for (j = 0, section = ibfd->sections;
5399 section = section->next)
5401 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5403 output_section = section->output_section;
5405 sections[j ++] = section;
5407 /* The Solaris native linker always sets p_paddr to 0.
5408 We try to catch that case here, and set it to the
5409 correct value. Note - some backends require that
5410 p_paddr be left as zero. */
5411 if (segment->p_paddr == 0
5412 && segment->p_vaddr != 0
5413 && (! bed->want_p_paddr_set_to_zero)
5415 && output_section->lma != 0
5416 && (output_section->vma == (segment->p_vaddr
5417 + (map->includes_filehdr
5420 + (map->includes_phdrs
5422 * iehdr->e_phentsize)
5424 map->p_paddr = segment->p_vaddr;
5426 /* Match up the physical address of the segment with the
5427 LMA address of the output section. */
5428 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5429 || IS_COREFILE_NOTE (segment, section)
5430 || (bed->want_p_paddr_set_to_zero &&
5431 IS_CONTAINED_BY_VMA (output_section, segment))
5434 if (matching_lma == 0)
5435 matching_lma = output_section->lma;
5437 /* We assume that if the section fits within the segment
5438 then it does not overlap any other section within that
5440 map->sections[isec ++] = output_section;
5442 else if (suggested_lma == 0)
5443 suggested_lma = output_section->lma;
5447 BFD_ASSERT (j == section_count);
5449 /* Step Two: Adjust the physical address of the current segment,
5451 if (isec == section_count)
5453 /* All of the sections fitted within the segment as currently
5454 specified. This is the default case. Add the segment to
5455 the list of built segments and carry on to process the next
5456 program header in the input BFD. */
5457 map->count = section_count;
5458 *pointer_to_map = map;
5459 pointer_to_map = &map->next;
5466 if (matching_lma != 0)
5468 /* At least one section fits inside the current segment.
5469 Keep it, but modify its physical address to match the
5470 LMA of the first section that fitted. */
5471 map->p_paddr = matching_lma;
5475 /* None of the sections fitted inside the current segment.
5476 Change the current segment's physical address to match
5477 the LMA of the first section. */
5478 map->p_paddr = suggested_lma;
5481 /* Offset the segment physical address from the lma
5482 to allow for space taken up by elf headers. */
5483 if (map->includes_filehdr)
5484 map->p_paddr -= iehdr->e_ehsize;
5486 if (map->includes_phdrs)
5488 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5490 /* iehdr->e_phnum is just an estimate of the number
5491 of program headers that we will need. Make a note
5492 here of the number we used and the segment we chose
5493 to hold these headers, so that we can adjust the
5494 offset when we know the correct value. */
5495 phdr_adjust_num = iehdr->e_phnum;
5496 phdr_adjust_seg = map;
5500 /* Step Three: Loop over the sections again, this time assigning
5501 those that fit to the current segment and removing them from the
5502 sections array; but making sure not to leave large gaps. Once all
5503 possible sections have been assigned to the current segment it is
5504 added to the list of built segments and if sections still remain
5505 to be assigned, a new segment is constructed before repeating
5513 /* Fill the current segment with sections that fit. */
5514 for (j = 0; j < section_count; j++)
5516 section = sections[j];
5518 if (section == NULL)
5521 output_section = section->output_section;
5523 BFD_ASSERT (output_section != NULL);
5525 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5526 || IS_COREFILE_NOTE (segment, section))
5528 if (map->count == 0)
5530 /* If the first section in a segment does not start at
5531 the beginning of the segment, then something is
5533 if (output_section->lma !=
5535 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5536 + (map->includes_phdrs
5537 ? iehdr->e_phnum * iehdr->e_phentsize
5543 asection * prev_sec;
5545 prev_sec = map->sections[map->count - 1];
5547 /* If the gap between the end of the previous section
5548 and the start of this section is more than
5549 maxpagesize then we need to start a new segment. */
5550 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5552 < BFD_ALIGN (output_section->lma, maxpagesize))
5553 || ((prev_sec->lma + prev_sec->size)
5554 > output_section->lma))
5556 if (suggested_lma == 0)
5557 suggested_lma = output_section->lma;
5563 map->sections[map->count++] = output_section;
5566 section->segment_mark = TRUE;
5568 else if (suggested_lma == 0)
5569 suggested_lma = output_section->lma;
5572 BFD_ASSERT (map->count > 0);
5574 /* Add the current segment to the list of built segments. */
5575 *pointer_to_map = map;
5576 pointer_to_map = &map->next;
5578 if (isec < section_count)
5580 /* We still have not allocated all of the sections to
5581 segments. Create a new segment here, initialise it
5582 and carry on looping. */
5583 amt = sizeof (struct elf_segment_map);
5584 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5585 map = bfd_alloc (obfd, amt);
5592 /* Initialise the fields of the segment map. Set the physical
5593 physical address to the LMA of the first section that has
5594 not yet been assigned. */
5596 map->p_type = segment->p_type;
5597 map->p_flags = segment->p_flags;
5598 map->p_flags_valid = 1;
5599 map->p_paddr = suggested_lma;
5600 map->p_paddr_valid = 1;
5601 map->includes_filehdr = 0;
5602 map->includes_phdrs = 0;
5605 while (isec < section_count);
5610 /* The Solaris linker creates program headers in which all the
5611 p_paddr fields are zero. When we try to objcopy or strip such a
5612 file, we get confused. Check for this case, and if we find it
5613 reset the p_paddr_valid fields. */
5614 for (map = map_first; map != NULL; map = map->next)
5615 if (map->p_paddr != 0)
5618 for (map = map_first; map != NULL; map = map->next)
5619 map->p_paddr_valid = 0;
5621 elf_tdata (obfd)->segment_map = map_first;
5623 /* If we had to estimate the number of program headers that were
5624 going to be needed, then check our estimate now and adjust
5625 the offset if necessary. */
5626 if (phdr_adjust_seg != NULL)
5630 for (count = 0, map = map_first; map != NULL; map = map->next)
5633 if (count > phdr_adjust_num)
5634 phdr_adjust_seg->p_paddr
5635 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5640 #undef IS_CONTAINED_BY_VMA
5641 #undef IS_CONTAINED_BY_LMA
5642 #undef IS_COREFILE_NOTE
5643 #undef IS_SOLARIS_PT_INTERP
5644 #undef INCLUDE_SECTION_IN_SEGMENT
5645 #undef SEGMENT_AFTER_SEGMENT
5646 #undef SEGMENT_OVERLAPS
5650 /* Copy private section information. This copies over the entsize
5651 field, and sometimes the info field. */
5654 _bfd_elf_copy_private_section_data (bfd *ibfd,
5659 Elf_Internal_Shdr *ihdr, *ohdr;
5661 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5662 || obfd->xvec->flavour != bfd_target_elf_flavour)
5665 ihdr = &elf_section_data (isec)->this_hdr;
5666 ohdr = &elf_section_data (osec)->this_hdr;
5668 ohdr->sh_entsize = ihdr->sh_entsize;
5670 if (ihdr->sh_type == SHT_SYMTAB
5671 || ihdr->sh_type == SHT_DYNSYM
5672 || ihdr->sh_type == SHT_GNU_verneed
5673 || ihdr->sh_type == SHT_GNU_verdef)
5674 ohdr->sh_info = ihdr->sh_info;
5676 /* Set things up for objcopy. The output SHT_GROUP section will
5677 have its elf_next_in_group pointing back to the input group
5678 members. Ignore linker created group section. See
5679 elfNN_ia64_object_p in elfxx-ia64.c. */
5680 if (elf_sec_group (isec) == NULL
5681 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
5683 elf_next_in_group (osec) = elf_next_in_group (isec);
5684 elf_group_name (osec) = elf_group_name (isec);
5687 osec->use_rela_p = isec->use_rela_p;
5692 /* Copy private header information. */
5695 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
5697 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5698 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5701 /* Copy over private BFD data if it has not already been copied.
5702 This must be done here, rather than in the copy_private_bfd_data
5703 entry point, because the latter is called after the section
5704 contents have been set, which means that the program headers have
5705 already been worked out. */
5706 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5708 if (! copy_private_bfd_data (ibfd, obfd))
5715 /* Copy private symbol information. If this symbol is in a section
5716 which we did not map into a BFD section, try to map the section
5717 index correctly. We use special macro definitions for the mapped
5718 section indices; these definitions are interpreted by the
5719 swap_out_syms function. */
5721 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5722 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5723 #define MAP_STRTAB (SHN_HIOS + 3)
5724 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5725 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5728 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
5733 elf_symbol_type *isym, *osym;
5735 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5736 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5739 isym = elf_symbol_from (ibfd, isymarg);
5740 osym = elf_symbol_from (obfd, osymarg);
5744 && bfd_is_abs_section (isym->symbol.section))
5748 shndx = isym->internal_elf_sym.st_shndx;
5749 if (shndx == elf_onesymtab (ibfd))
5750 shndx = MAP_ONESYMTAB;
5751 else if (shndx == elf_dynsymtab (ibfd))
5752 shndx = MAP_DYNSYMTAB;
5753 else if (shndx == elf_tdata (ibfd)->strtab_section)
5755 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5756 shndx = MAP_SHSTRTAB;
5757 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5758 shndx = MAP_SYM_SHNDX;
5759 osym->internal_elf_sym.st_shndx = shndx;
5765 /* Swap out the symbols. */
5768 swap_out_syms (bfd *abfd,
5769 struct bfd_strtab_hash **sttp,
5772 const struct elf_backend_data *bed;
5775 struct bfd_strtab_hash *stt;
5776 Elf_Internal_Shdr *symtab_hdr;
5777 Elf_Internal_Shdr *symtab_shndx_hdr;
5778 Elf_Internal_Shdr *symstrtab_hdr;
5779 bfd_byte *outbound_syms;
5780 bfd_byte *outbound_shndx;
5783 bfd_boolean name_local_sections;
5785 if (!elf_map_symbols (abfd))
5788 /* Dump out the symtabs. */
5789 stt = _bfd_elf_stringtab_init ();
5793 bed = get_elf_backend_data (abfd);
5794 symcount = bfd_get_symcount (abfd);
5795 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5796 symtab_hdr->sh_type = SHT_SYMTAB;
5797 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5798 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5799 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5800 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
5802 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5803 symstrtab_hdr->sh_type = SHT_STRTAB;
5805 amt = (bfd_size_type) (1 + symcount) * bed->s->sizeof_sym;
5806 outbound_syms = bfd_alloc (abfd, amt);
5807 if (outbound_syms == NULL)
5809 _bfd_stringtab_free (stt);
5812 symtab_hdr->contents = outbound_syms;
5814 outbound_shndx = NULL;
5815 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5816 if (symtab_shndx_hdr->sh_name != 0)
5818 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
5819 outbound_shndx = bfd_zalloc (abfd, amt);
5820 if (outbound_shndx == NULL)
5822 _bfd_stringtab_free (stt);
5826 symtab_shndx_hdr->contents = outbound_shndx;
5827 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5828 symtab_shndx_hdr->sh_size = amt;
5829 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5830 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5833 /* Now generate the data (for "contents"). */
5835 /* Fill in zeroth symbol and swap it out. */
5836 Elf_Internal_Sym sym;
5842 sym.st_shndx = SHN_UNDEF;
5843 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5844 outbound_syms += bed->s->sizeof_sym;
5845 if (outbound_shndx != NULL)
5846 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5850 = (bed->elf_backend_name_local_section_symbols
5851 && bed->elf_backend_name_local_section_symbols (abfd));
5853 syms = bfd_get_outsymbols (abfd);
5854 for (idx = 0; idx < symcount; idx++)
5856 Elf_Internal_Sym sym;
5857 bfd_vma value = syms[idx]->value;
5858 elf_symbol_type *type_ptr;
5859 flagword flags = syms[idx]->flags;
5862 if (!name_local_sections
5863 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
5865 /* Local section symbols have no name. */
5870 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5873 if (sym.st_name == (unsigned long) -1)
5875 _bfd_stringtab_free (stt);
5880 type_ptr = elf_symbol_from (abfd, syms[idx]);
5882 if ((flags & BSF_SECTION_SYM) == 0
5883 && bfd_is_com_section (syms[idx]->section))
5885 /* ELF common symbols put the alignment into the `value' field,
5886 and the size into the `size' field. This is backwards from
5887 how BFD handles it, so reverse it here. */
5888 sym.st_size = value;
5889 if (type_ptr == NULL
5890 || type_ptr->internal_elf_sym.st_value == 0)
5891 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5893 sym.st_value = type_ptr->internal_elf_sym.st_value;
5894 sym.st_shndx = _bfd_elf_section_from_bfd_section
5895 (abfd, syms[idx]->section);
5899 asection *sec = syms[idx]->section;
5902 if (sec->output_section)
5904 value += sec->output_offset;
5905 sec = sec->output_section;
5908 /* Don't add in the section vma for relocatable output. */
5909 if (! relocatable_p)
5911 sym.st_value = value;
5912 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5914 if (bfd_is_abs_section (sec)
5916 && type_ptr->internal_elf_sym.st_shndx != 0)
5918 /* This symbol is in a real ELF section which we did
5919 not create as a BFD section. Undo the mapping done
5920 by copy_private_symbol_data. */
5921 shndx = type_ptr->internal_elf_sym.st_shndx;
5925 shndx = elf_onesymtab (abfd);
5928 shndx = elf_dynsymtab (abfd);
5931 shndx = elf_tdata (abfd)->strtab_section;
5934 shndx = elf_tdata (abfd)->shstrtab_section;
5937 shndx = elf_tdata (abfd)->symtab_shndx_section;
5945 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5951 /* Writing this would be a hell of a lot easier if
5952 we had some decent documentation on bfd, and
5953 knew what to expect of the library, and what to
5954 demand of applications. For example, it
5955 appears that `objcopy' might not set the
5956 section of a symbol to be a section that is
5957 actually in the output file. */
5958 sec2 = bfd_get_section_by_name (abfd, sec->name);
5961 _bfd_error_handler (_("\
5962 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5963 syms[idx]->name ? syms[idx]->name : "<Local sym>",
5965 bfd_set_error (bfd_error_invalid_operation);
5966 _bfd_stringtab_free (stt);
5970 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5971 BFD_ASSERT (shndx != -1);
5975 sym.st_shndx = shndx;
5978 if ((flags & BSF_THREAD_LOCAL) != 0)
5980 else if ((flags & BSF_FUNCTION) != 0)
5982 else if ((flags & BSF_OBJECT) != 0)
5987 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
5990 /* Processor-specific types. */
5991 if (type_ptr != NULL
5992 && bed->elf_backend_get_symbol_type)
5993 type = ((*bed->elf_backend_get_symbol_type)
5994 (&type_ptr->internal_elf_sym, type));
5996 if (flags & BSF_SECTION_SYM)
5998 if (flags & BSF_GLOBAL)
5999 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6001 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6003 else if (bfd_is_com_section (syms[idx]->section))
6004 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6005 else if (bfd_is_und_section (syms[idx]->section))
6006 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6010 else if (flags & BSF_FILE)
6011 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6014 int bind = STB_LOCAL;
6016 if (flags & BSF_LOCAL)
6018 else if (flags & BSF_WEAK)
6020 else if (flags & BSF_GLOBAL)
6023 sym.st_info = ELF_ST_INFO (bind, type);
6026 if (type_ptr != NULL)
6027 sym.st_other = type_ptr->internal_elf_sym.st_other;
6031 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6032 outbound_syms += bed->s->sizeof_sym;
6033 if (outbound_shndx != NULL)
6034 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6038 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6039 symstrtab_hdr->sh_type = SHT_STRTAB;
6041 symstrtab_hdr->sh_flags = 0;
6042 symstrtab_hdr->sh_addr = 0;
6043 symstrtab_hdr->sh_entsize = 0;
6044 symstrtab_hdr->sh_link = 0;
6045 symstrtab_hdr->sh_info = 0;
6046 symstrtab_hdr->sh_addralign = 1;
6051 /* Return the number of bytes required to hold the symtab vector.
6053 Note that we base it on the count plus 1, since we will null terminate
6054 the vector allocated based on this size. However, the ELF symbol table
6055 always has a dummy entry as symbol #0, so it ends up even. */
6058 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6062 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6064 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6065 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6067 symtab_size -= sizeof (asymbol *);
6073 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6077 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6079 if (elf_dynsymtab (abfd) == 0)
6081 bfd_set_error (bfd_error_invalid_operation);
6085 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6086 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6088 symtab_size -= sizeof (asymbol *);
6094 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6097 return (asect->reloc_count + 1) * sizeof (arelent *);
6100 /* Canonicalize the relocs. */
6103 _bfd_elf_canonicalize_reloc (bfd *abfd,
6110 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6112 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6115 tblptr = section->relocation;
6116 for (i = 0; i < section->reloc_count; i++)
6117 *relptr++ = tblptr++;
6121 return section->reloc_count;
6125 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6127 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6128 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6131 bfd_get_symcount (abfd) = symcount;
6136 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6137 asymbol **allocation)
6139 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6140 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6143 bfd_get_dynamic_symcount (abfd) = symcount;
6147 /* Return the size required for the dynamic reloc entries. Any loadable
6148 section that was actually installed in the BFD, and has type SHT_REL
6149 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6150 dynamic reloc section. */
6153 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6158 if (elf_dynsymtab (abfd) == 0)
6160 bfd_set_error (bfd_error_invalid_operation);
6164 ret = sizeof (arelent *);
6165 for (s = abfd->sections; s != NULL; s = s->next)
6166 if ((s->flags & SEC_LOAD) != 0
6167 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6168 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6169 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6170 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6171 * sizeof (arelent *));
6176 /* Canonicalize the dynamic relocation entries. Note that we return the
6177 dynamic relocations as a single block, although they are actually
6178 associated with particular sections; the interface, which was
6179 designed for SunOS style shared libraries, expects that there is only
6180 one set of dynamic relocs. Any loadable section that was actually
6181 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6182 dynamic symbol table, is considered to be a dynamic reloc section. */
6185 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6189 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6193 if (elf_dynsymtab (abfd) == 0)
6195 bfd_set_error (bfd_error_invalid_operation);
6199 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6201 for (s = abfd->sections; s != NULL; s = s->next)
6203 if ((s->flags & SEC_LOAD) != 0
6204 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6205 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6206 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6211 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6213 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6215 for (i = 0; i < count; i++)
6226 /* Read in the version information. */
6229 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6231 bfd_byte *contents = NULL;
6233 unsigned int freeidx = 0;
6235 if (elf_dynverref (abfd) != 0)
6237 Elf_Internal_Shdr *hdr;
6238 Elf_External_Verneed *everneed;
6239 Elf_Internal_Verneed *iverneed;
6242 hdr = &elf_tdata (abfd)->dynverref_hdr;
6244 amt = (bfd_size_type) hdr->sh_info * sizeof (Elf_Internal_Verneed);
6245 elf_tdata (abfd)->verref = bfd_zalloc (abfd, amt);
6246 if (elf_tdata (abfd)->verref == NULL)
6249 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6251 contents = bfd_malloc (hdr->sh_size);
6252 if (contents == NULL)
6254 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6255 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6258 everneed = (Elf_External_Verneed *) contents;
6259 iverneed = elf_tdata (abfd)->verref;
6260 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6262 Elf_External_Vernaux *evernaux;
6263 Elf_Internal_Vernaux *ivernaux;
6266 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6268 iverneed->vn_bfd = abfd;
6270 iverneed->vn_filename =
6271 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6273 if (iverneed->vn_filename == NULL)
6276 amt = iverneed->vn_cnt;
6277 amt *= sizeof (Elf_Internal_Vernaux);
6278 iverneed->vn_auxptr = bfd_alloc (abfd, amt);
6280 evernaux = ((Elf_External_Vernaux *)
6281 ((bfd_byte *) everneed + iverneed->vn_aux));
6282 ivernaux = iverneed->vn_auxptr;
6283 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6285 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6287 ivernaux->vna_nodename =
6288 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6289 ivernaux->vna_name);
6290 if (ivernaux->vna_nodename == NULL)
6293 if (j + 1 < iverneed->vn_cnt)
6294 ivernaux->vna_nextptr = ivernaux + 1;
6296 ivernaux->vna_nextptr = NULL;
6298 evernaux = ((Elf_External_Vernaux *)
6299 ((bfd_byte *) evernaux + ivernaux->vna_next));
6301 if (ivernaux->vna_other > freeidx)
6302 freeidx = ivernaux->vna_other;
6305 if (i + 1 < hdr->sh_info)
6306 iverneed->vn_nextref = iverneed + 1;
6308 iverneed->vn_nextref = NULL;
6310 everneed = ((Elf_External_Verneed *)
6311 ((bfd_byte *) everneed + iverneed->vn_next));
6318 if (elf_dynverdef (abfd) != 0)
6320 Elf_Internal_Shdr *hdr;
6321 Elf_External_Verdef *everdef;
6322 Elf_Internal_Verdef *iverdef;
6323 Elf_Internal_Verdef *iverdefarr;
6324 Elf_Internal_Verdef iverdefmem;
6326 unsigned int maxidx;
6328 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6330 contents = bfd_malloc (hdr->sh_size);
6331 if (contents == NULL)
6333 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6334 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6337 /* We know the number of entries in the section but not the maximum
6338 index. Therefore we have to run through all entries and find
6340 everdef = (Elf_External_Verdef *) contents;
6342 for (i = 0; i < hdr->sh_info; ++i)
6344 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6346 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6347 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6349 everdef = ((Elf_External_Verdef *)
6350 ((bfd_byte *) everdef + iverdefmem.vd_next));
6353 if (default_imported_symver)
6355 if (freeidx > maxidx)
6360 amt = (bfd_size_type) maxidx * sizeof (Elf_Internal_Verdef);
6361 elf_tdata (abfd)->verdef = bfd_zalloc (abfd, amt);
6362 if (elf_tdata (abfd)->verdef == NULL)
6365 elf_tdata (abfd)->cverdefs = maxidx;
6367 everdef = (Elf_External_Verdef *) contents;
6368 iverdefarr = elf_tdata (abfd)->verdef;
6369 for (i = 0; i < hdr->sh_info; i++)
6371 Elf_External_Verdaux *everdaux;
6372 Elf_Internal_Verdaux *iverdaux;
6375 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6377 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6378 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6380 iverdef->vd_bfd = abfd;
6382 amt = (bfd_size_type) iverdef->vd_cnt * sizeof (Elf_Internal_Verdaux);
6383 iverdef->vd_auxptr = bfd_alloc (abfd, amt);
6384 if (iverdef->vd_auxptr == NULL)
6387 everdaux = ((Elf_External_Verdaux *)
6388 ((bfd_byte *) everdef + iverdef->vd_aux));
6389 iverdaux = iverdef->vd_auxptr;
6390 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6392 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6394 iverdaux->vda_nodename =
6395 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6396 iverdaux->vda_name);
6397 if (iverdaux->vda_nodename == NULL)
6400 if (j + 1 < iverdef->vd_cnt)
6401 iverdaux->vda_nextptr = iverdaux + 1;
6403 iverdaux->vda_nextptr = NULL;
6405 everdaux = ((Elf_External_Verdaux *)
6406 ((bfd_byte *) everdaux + iverdaux->vda_next));
6409 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6411 if (i + 1 < hdr->sh_info)
6412 iverdef->vd_nextdef = iverdef + 1;
6414 iverdef->vd_nextdef = NULL;
6416 everdef = ((Elf_External_Verdef *)
6417 ((bfd_byte *) everdef + iverdef->vd_next));
6423 else if (default_imported_symver)
6430 amt = (bfd_size_type) freeidx * sizeof (Elf_Internal_Verdef);
6431 elf_tdata (abfd)->verdef = bfd_zalloc (abfd, amt);
6432 if (elf_tdata (abfd)->verdef == NULL)
6435 elf_tdata (abfd)->cverdefs = freeidx;
6438 /* Create a default version based on the soname. */
6439 if (default_imported_symver)
6441 Elf_Internal_Verdef *iverdef;
6442 Elf_Internal_Verdaux *iverdaux;
6444 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6446 iverdef->vd_version = VER_DEF_CURRENT;
6447 iverdef->vd_flags = 0;
6448 iverdef->vd_ndx = freeidx;
6449 iverdef->vd_cnt = 1;
6451 iverdef->vd_bfd = abfd;
6453 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6454 if (iverdef->vd_nodename == NULL)
6456 iverdef->vd_nextdef = NULL;
6457 amt = (bfd_size_type) sizeof (Elf_Internal_Verdaux);
6458 iverdef->vd_auxptr = bfd_alloc (abfd, amt);
6460 iverdaux = iverdef->vd_auxptr;
6461 iverdaux->vda_nodename = iverdef->vd_nodename;
6462 iverdaux->vda_nextptr = NULL;
6468 if (contents != NULL)
6474 _bfd_elf_make_empty_symbol (bfd *abfd)
6476 elf_symbol_type *newsym;
6477 bfd_size_type amt = sizeof (elf_symbol_type);
6479 newsym = bfd_zalloc (abfd, amt);
6484 newsym->symbol.the_bfd = abfd;
6485 return &newsym->symbol;
6490 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
6494 bfd_symbol_info (symbol, ret);
6497 /* Return whether a symbol name implies a local symbol. Most targets
6498 use this function for the is_local_label_name entry point, but some
6502 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
6505 /* Normal local symbols start with ``.L''. */
6506 if (name[0] == '.' && name[1] == 'L')
6509 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6510 DWARF debugging symbols starting with ``..''. */
6511 if (name[0] == '.' && name[1] == '.')
6514 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6515 emitting DWARF debugging output. I suspect this is actually a
6516 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6517 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6518 underscore to be emitted on some ELF targets). For ease of use,
6519 we treat such symbols as local. */
6520 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6527 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6528 asymbol *symbol ATTRIBUTE_UNUSED)
6535 _bfd_elf_set_arch_mach (bfd *abfd,
6536 enum bfd_architecture arch,
6537 unsigned long machine)
6539 /* If this isn't the right architecture for this backend, and this
6540 isn't the generic backend, fail. */
6541 if (arch != get_elf_backend_data (abfd)->arch
6542 && arch != bfd_arch_unknown
6543 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6546 return bfd_default_set_arch_mach (abfd, arch, machine);
6549 /* Find the function to a particular section and offset,
6550 for error reporting. */
6553 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6557 const char **filename_ptr,
6558 const char **functionname_ptr)
6560 const char *filename;
6561 asymbol *func, *file;
6564 /* ??? Given multiple file symbols, it is impossible to reliably
6565 choose the right file name for global symbols. File symbols are
6566 local symbols, and thus all file symbols must sort before any
6567 global symbols. The ELF spec may be interpreted to say that a
6568 file symbol must sort before other local symbols, but currently
6569 ld -r doesn't do this. So, for ld -r output, it is possible to
6570 make a better choice of file name for local symbols by ignoring
6571 file symbols appearing after a given local symbol. */
6572 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
6578 state = nothing_seen;
6580 for (p = symbols; *p != NULL; p++)
6584 q = (elf_symbol_type *) *p;
6586 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6592 if (state == symbol_seen)
6593 state = file_after_symbol_seen;
6599 if (bfd_get_section (&q->symbol) == section
6600 && q->symbol.value >= low_func
6601 && q->symbol.value <= offset)
6603 func = (asymbol *) q;
6604 low_func = q->symbol.value;
6607 else if (ELF_ST_BIND (q->internal_elf_sym.st_info) != STB_LOCAL
6608 && state == file_after_symbol_seen)
6611 filename = bfd_asymbol_name (file);
6615 if (state == nothing_seen)
6616 state = symbol_seen;
6623 *filename_ptr = filename;
6624 if (functionname_ptr)
6625 *functionname_ptr = bfd_asymbol_name (func);
6630 /* Find the nearest line to a particular section and offset,
6631 for error reporting. */
6634 _bfd_elf_find_nearest_line (bfd *abfd,
6638 const char **filename_ptr,
6639 const char **functionname_ptr,
6640 unsigned int *line_ptr)
6644 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6645 filename_ptr, functionname_ptr,
6648 if (!*functionname_ptr)
6649 elf_find_function (abfd, section, symbols, offset,
6650 *filename_ptr ? NULL : filename_ptr,
6656 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6657 filename_ptr, functionname_ptr,
6659 &elf_tdata (abfd)->dwarf2_find_line_info))
6661 if (!*functionname_ptr)
6662 elf_find_function (abfd, section, symbols, offset,
6663 *filename_ptr ? NULL : filename_ptr,
6669 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6670 &found, filename_ptr,
6671 functionname_ptr, line_ptr,
6672 &elf_tdata (abfd)->line_info))
6674 if (found && (*functionname_ptr || *line_ptr))
6677 if (symbols == NULL)
6680 if (! elf_find_function (abfd, section, symbols, offset,
6681 filename_ptr, functionname_ptr))
6689 _bfd_elf_sizeof_headers (bfd *abfd, bfd_boolean reloc)
6693 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
6695 ret += get_program_header_size (abfd);
6700 _bfd_elf_set_section_contents (bfd *abfd,
6702 const void *location,
6704 bfd_size_type count)
6706 Elf_Internal_Shdr *hdr;
6709 if (! abfd->output_has_begun
6710 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6713 hdr = &elf_section_data (section)->this_hdr;
6714 pos = hdr->sh_offset + offset;
6715 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6716 || bfd_bwrite (location, count, abfd) != count)
6723 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
6724 arelent *cache_ptr ATTRIBUTE_UNUSED,
6725 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
6730 /* Try to convert a non-ELF reloc into an ELF one. */
6733 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
6735 /* Check whether we really have an ELF howto. */
6737 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6739 bfd_reloc_code_real_type code;
6740 reloc_howto_type *howto;
6742 /* Alien reloc: Try to determine its type to replace it with an
6743 equivalent ELF reloc. */
6745 if (areloc->howto->pc_relative)
6747 switch (areloc->howto->bitsize)
6750 code = BFD_RELOC_8_PCREL;
6753 code = BFD_RELOC_12_PCREL;
6756 code = BFD_RELOC_16_PCREL;
6759 code = BFD_RELOC_24_PCREL;
6762 code = BFD_RELOC_32_PCREL;
6765 code = BFD_RELOC_64_PCREL;
6771 howto = bfd_reloc_type_lookup (abfd, code);
6773 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6775 if (howto->pcrel_offset)
6776 areloc->addend += areloc->address;
6778 areloc->addend -= areloc->address; /* addend is unsigned!! */
6783 switch (areloc->howto->bitsize)
6789 code = BFD_RELOC_14;
6792 code = BFD_RELOC_16;
6795 code = BFD_RELOC_26;
6798 code = BFD_RELOC_32;
6801 code = BFD_RELOC_64;
6807 howto = bfd_reloc_type_lookup (abfd, code);
6811 areloc->howto = howto;
6819 (*_bfd_error_handler)
6820 (_("%B: unsupported relocation type %s"),
6821 abfd, areloc->howto->name);
6822 bfd_set_error (bfd_error_bad_value);
6827 _bfd_elf_close_and_cleanup (bfd *abfd)
6829 if (bfd_get_format (abfd) == bfd_object)
6831 if (elf_shstrtab (abfd) != NULL)
6832 _bfd_elf_strtab_free (elf_shstrtab (abfd));
6833 _bfd_dwarf2_cleanup_debug_info (abfd);
6836 return _bfd_generic_close_and_cleanup (abfd);
6839 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6840 in the relocation's offset. Thus we cannot allow any sort of sanity
6841 range-checking to interfere. There is nothing else to do in processing
6844 bfd_reloc_status_type
6845 _bfd_elf_rel_vtable_reloc_fn
6846 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
6847 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
6848 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
6849 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
6851 return bfd_reloc_ok;
6854 /* Elf core file support. Much of this only works on native
6855 toolchains, since we rely on knowing the
6856 machine-dependent procfs structure in order to pick
6857 out details about the corefile. */
6859 #ifdef HAVE_SYS_PROCFS_H
6860 # include <sys/procfs.h>
6863 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6866 elfcore_make_pid (bfd *abfd)
6868 return ((elf_tdata (abfd)->core_lwpid << 16)
6869 + (elf_tdata (abfd)->core_pid));
6872 /* If there isn't a section called NAME, make one, using
6873 data from SECT. Note, this function will generate a
6874 reference to NAME, so you shouldn't deallocate or
6878 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
6882 if (bfd_get_section_by_name (abfd, name) != NULL)
6885 sect2 = bfd_make_section (abfd, name);
6889 sect2->size = sect->size;
6890 sect2->filepos = sect->filepos;
6891 sect2->flags = sect->flags;
6892 sect2->alignment_power = sect->alignment_power;
6896 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6897 actually creates up to two pseudosections:
6898 - For the single-threaded case, a section named NAME, unless
6899 such a section already exists.
6900 - For the multi-threaded case, a section named "NAME/PID", where
6901 PID is elfcore_make_pid (abfd).
6902 Both pseudosections have identical contents. */
6904 _bfd_elfcore_make_pseudosection (bfd *abfd,
6910 char *threaded_name;
6914 /* Build the section name. */
6916 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
6917 len = strlen (buf) + 1;
6918 threaded_name = bfd_alloc (abfd, len);
6919 if (threaded_name == NULL)
6921 memcpy (threaded_name, buf, len);
6923 sect = bfd_make_section_anyway (abfd, threaded_name);
6927 sect->filepos = filepos;
6928 sect->flags = SEC_HAS_CONTENTS;
6929 sect->alignment_power = 2;
6931 return elfcore_maybe_make_sect (abfd, name, sect);
6934 /* prstatus_t exists on:
6936 linux 2.[01] + glibc
6940 #if defined (HAVE_PRSTATUS_T)
6943 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
6948 if (note->descsz == sizeof (prstatus_t))
6952 size = sizeof (prstat.pr_reg);
6953 offset = offsetof (prstatus_t, pr_reg);
6954 memcpy (&prstat, note->descdata, sizeof (prstat));
6956 /* Do not overwrite the core signal if it
6957 has already been set by another thread. */
6958 if (elf_tdata (abfd)->core_signal == 0)
6959 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6960 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6962 /* pr_who exists on:
6965 pr_who doesn't exist on:
6968 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6969 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6972 #if defined (HAVE_PRSTATUS32_T)
6973 else if (note->descsz == sizeof (prstatus32_t))
6975 /* 64-bit host, 32-bit corefile */
6976 prstatus32_t prstat;
6978 size = sizeof (prstat.pr_reg);
6979 offset = offsetof (prstatus32_t, pr_reg);
6980 memcpy (&prstat, note->descdata, sizeof (prstat));
6982 /* Do not overwrite the core signal if it
6983 has already been set by another thread. */
6984 if (elf_tdata (abfd)->core_signal == 0)
6985 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6986 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6988 /* pr_who exists on:
6991 pr_who doesn't exist on:
6994 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6995 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6998 #endif /* HAVE_PRSTATUS32_T */
7001 /* Fail - we don't know how to handle any other
7002 note size (ie. data object type). */
7006 /* Make a ".reg/999" section and a ".reg" section. */
7007 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7008 size, note->descpos + offset);
7010 #endif /* defined (HAVE_PRSTATUS_T) */
7012 /* Create a pseudosection containing the exact contents of NOTE. */
7014 elfcore_make_note_pseudosection (bfd *abfd,
7016 Elf_Internal_Note *note)
7018 return _bfd_elfcore_make_pseudosection (abfd, name,
7019 note->descsz, note->descpos);
7022 /* There isn't a consistent prfpregset_t across platforms,
7023 but it doesn't matter, because we don't have to pick this
7024 data structure apart. */
7027 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7029 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7032 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7033 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7037 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7039 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7042 #if defined (HAVE_PRPSINFO_T)
7043 typedef prpsinfo_t elfcore_psinfo_t;
7044 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7045 typedef prpsinfo32_t elfcore_psinfo32_t;
7049 #if defined (HAVE_PSINFO_T)
7050 typedef psinfo_t elfcore_psinfo_t;
7051 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7052 typedef psinfo32_t elfcore_psinfo32_t;
7056 /* return a malloc'ed copy of a string at START which is at
7057 most MAX bytes long, possibly without a terminating '\0'.
7058 the copy will always have a terminating '\0'. */
7061 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7064 char *end = memchr (start, '\0', max);
7072 dups = bfd_alloc (abfd, len + 1);
7076 memcpy (dups, start, len);
7082 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7084 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7086 if (note->descsz == sizeof (elfcore_psinfo_t))
7088 elfcore_psinfo_t psinfo;
7090 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7092 elf_tdata (abfd)->core_program
7093 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7094 sizeof (psinfo.pr_fname));
7096 elf_tdata (abfd)->core_command
7097 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7098 sizeof (psinfo.pr_psargs));
7100 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7101 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7103 /* 64-bit host, 32-bit corefile */
7104 elfcore_psinfo32_t psinfo;
7106 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7108 elf_tdata (abfd)->core_program
7109 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7110 sizeof (psinfo.pr_fname));
7112 elf_tdata (abfd)->core_command
7113 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7114 sizeof (psinfo.pr_psargs));
7120 /* Fail - we don't know how to handle any other
7121 note size (ie. data object type). */
7125 /* Note that for some reason, a spurious space is tacked
7126 onto the end of the args in some (at least one anyway)
7127 implementations, so strip it off if it exists. */
7130 char *command = elf_tdata (abfd)->core_command;
7131 int n = strlen (command);
7133 if (0 < n && command[n - 1] == ' ')
7134 command[n - 1] = '\0';
7139 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7141 #if defined (HAVE_PSTATUS_T)
7143 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7145 if (note->descsz == sizeof (pstatus_t)
7146 #if defined (HAVE_PXSTATUS_T)
7147 || note->descsz == sizeof (pxstatus_t)
7153 memcpy (&pstat, note->descdata, sizeof (pstat));
7155 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7157 #if defined (HAVE_PSTATUS32_T)
7158 else if (note->descsz == sizeof (pstatus32_t))
7160 /* 64-bit host, 32-bit corefile */
7163 memcpy (&pstat, note->descdata, sizeof (pstat));
7165 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7168 /* Could grab some more details from the "representative"
7169 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7170 NT_LWPSTATUS note, presumably. */
7174 #endif /* defined (HAVE_PSTATUS_T) */
7176 #if defined (HAVE_LWPSTATUS_T)
7178 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7180 lwpstatus_t lwpstat;
7186 if (note->descsz != sizeof (lwpstat)
7187 #if defined (HAVE_LWPXSTATUS_T)
7188 && note->descsz != sizeof (lwpxstatus_t)
7193 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7195 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7196 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7198 /* Make a ".reg/999" section. */
7200 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7201 len = strlen (buf) + 1;
7202 name = bfd_alloc (abfd, len);
7205 memcpy (name, buf, len);
7207 sect = bfd_make_section_anyway (abfd, name);
7211 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7212 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7213 sect->filepos = note->descpos
7214 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7217 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7218 sect->size = sizeof (lwpstat.pr_reg);
7219 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7222 sect->flags = SEC_HAS_CONTENTS;
7223 sect->alignment_power = 2;
7225 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7228 /* Make a ".reg2/999" section */
7230 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7231 len = strlen (buf) + 1;
7232 name = bfd_alloc (abfd, len);
7235 memcpy (name, buf, len);
7237 sect = bfd_make_section_anyway (abfd, name);
7241 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7242 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7243 sect->filepos = note->descpos
7244 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7247 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7248 sect->size = sizeof (lwpstat.pr_fpreg);
7249 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7252 sect->flags = SEC_HAS_CONTENTS;
7253 sect->alignment_power = 2;
7255 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7257 #endif /* defined (HAVE_LWPSTATUS_T) */
7259 #if defined (HAVE_WIN32_PSTATUS_T)
7261 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7267 win32_pstatus_t pstatus;
7269 if (note->descsz < sizeof (pstatus))
7272 memcpy (&pstatus, note->descdata, sizeof (pstatus));
7274 switch (pstatus.data_type)
7276 case NOTE_INFO_PROCESS:
7277 /* FIXME: need to add ->core_command. */
7278 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
7279 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
7282 case NOTE_INFO_THREAD:
7283 /* Make a ".reg/999" section. */
7284 sprintf (buf, ".reg/%ld", (long) pstatus.data.thread_info.tid);
7286 len = strlen (buf) + 1;
7287 name = bfd_alloc (abfd, len);
7291 memcpy (name, buf, len);
7293 sect = bfd_make_section_anyway (abfd, name);
7297 sect->size = sizeof (pstatus.data.thread_info.thread_context);
7298 sect->filepos = (note->descpos
7299 + offsetof (struct win32_pstatus,
7300 data.thread_info.thread_context));
7301 sect->flags = SEC_HAS_CONTENTS;
7302 sect->alignment_power = 2;
7304 if (pstatus.data.thread_info.is_active_thread)
7305 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7309 case NOTE_INFO_MODULE:
7310 /* Make a ".module/xxxxxxxx" section. */
7311 sprintf (buf, ".module/%08lx",
7312 (long) pstatus.data.module_info.base_address);
7314 len = strlen (buf) + 1;
7315 name = bfd_alloc (abfd, len);
7319 memcpy (name, buf, len);
7321 sect = bfd_make_section_anyway (abfd, name);
7326 sect->size = note->descsz;
7327 sect->filepos = note->descpos;
7328 sect->flags = SEC_HAS_CONTENTS;
7329 sect->alignment_power = 2;
7338 #endif /* HAVE_WIN32_PSTATUS_T */
7341 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7343 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7351 if (bed->elf_backend_grok_prstatus)
7352 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7354 #if defined (HAVE_PRSTATUS_T)
7355 return elfcore_grok_prstatus (abfd, note);
7360 #if defined (HAVE_PSTATUS_T)
7362 return elfcore_grok_pstatus (abfd, note);
7365 #if defined (HAVE_LWPSTATUS_T)
7367 return elfcore_grok_lwpstatus (abfd, note);
7370 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7371 return elfcore_grok_prfpreg (abfd, note);
7373 #if defined (HAVE_WIN32_PSTATUS_T)
7374 case NT_WIN32PSTATUS:
7375 return elfcore_grok_win32pstatus (abfd, note);
7378 case NT_PRXFPREG: /* Linux SSE extension */
7379 if (note->namesz == 6
7380 && strcmp (note->namedata, "LINUX") == 0)
7381 return elfcore_grok_prxfpreg (abfd, note);
7387 if (bed->elf_backend_grok_psinfo)
7388 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7390 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7391 return elfcore_grok_psinfo (abfd, note);
7398 asection *sect = bfd_make_section_anyway (abfd, ".auxv");
7402 sect->size = note->descsz;
7403 sect->filepos = note->descpos;
7404 sect->flags = SEC_HAS_CONTENTS;
7405 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7413 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
7417 cp = strchr (note->namedata, '@');
7420 *lwpidp = atoi(cp + 1);
7427 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
7430 /* Signal number at offset 0x08. */
7431 elf_tdata (abfd)->core_signal
7432 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7434 /* Process ID at offset 0x50. */
7435 elf_tdata (abfd)->core_pid
7436 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7438 /* Command name at 0x7c (max 32 bytes, including nul). */
7439 elf_tdata (abfd)->core_command
7440 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
7442 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
7447 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
7451 if (elfcore_netbsd_get_lwpid (note, &lwp))
7452 elf_tdata (abfd)->core_lwpid = lwp;
7454 if (note->type == NT_NETBSDCORE_PROCINFO)
7456 /* NetBSD-specific core "procinfo". Note that we expect to
7457 find this note before any of the others, which is fine,
7458 since the kernel writes this note out first when it
7459 creates a core file. */
7461 return elfcore_grok_netbsd_procinfo (abfd, note);
7464 /* As of Jan 2002 there are no other machine-independent notes
7465 defined for NetBSD core files. If the note type is less
7466 than the start of the machine-dependent note types, we don't
7469 if (note->type < NT_NETBSDCORE_FIRSTMACH)
7473 switch (bfd_get_arch (abfd))
7475 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7476 PT_GETFPREGS == mach+2. */
7478 case bfd_arch_alpha:
7479 case bfd_arch_sparc:
7482 case NT_NETBSDCORE_FIRSTMACH+0:
7483 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7485 case NT_NETBSDCORE_FIRSTMACH+2:
7486 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7492 /* On all other arch's, PT_GETREGS == mach+1 and
7493 PT_GETFPREGS == mach+3. */
7498 case NT_NETBSDCORE_FIRSTMACH+1:
7499 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7501 case NT_NETBSDCORE_FIRSTMACH+3:
7502 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7512 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, pid_t *tid)
7514 void *ddata = note->descdata;
7521 /* nto_procfs_status 'pid' field is at offset 0. */
7522 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
7524 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7525 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
7527 /* nto_procfs_status 'flags' field is at offset 8. */
7528 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
7530 /* nto_procfs_status 'what' field is at offset 14. */
7531 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
7533 elf_tdata (abfd)->core_signal = sig;
7534 elf_tdata (abfd)->core_lwpid = *tid;
7537 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7538 do not come from signals so we make sure we set the current
7539 thread just in case. */
7540 if (flags & 0x00000080)
7541 elf_tdata (abfd)->core_lwpid = *tid;
7543 /* Make a ".qnx_core_status/%d" section. */
7544 sprintf (buf, ".qnx_core_status/%ld", (long) *tid);
7546 name = bfd_alloc (abfd, strlen (buf) + 1);
7551 sect = bfd_make_section_anyway (abfd, name);
7555 sect->size = note->descsz;
7556 sect->filepos = note->descpos;
7557 sect->flags = SEC_HAS_CONTENTS;
7558 sect->alignment_power = 2;
7560 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7564 elfcore_grok_nto_regs (bfd *abfd,
7565 Elf_Internal_Note *note,
7573 /* Make a "(base)/%d" section. */
7574 sprintf (buf, "%s/%ld", base, (long) tid);
7576 name = bfd_alloc (abfd, strlen (buf) + 1);
7581 sect = bfd_make_section_anyway (abfd, name);
7585 sect->size = note->descsz;
7586 sect->filepos = note->descpos;
7587 sect->flags = SEC_HAS_CONTENTS;
7588 sect->alignment_power = 2;
7590 /* This is the current thread. */
7591 if (elf_tdata (abfd)->core_lwpid == tid)
7592 return elfcore_maybe_make_sect (abfd, base, sect);
7597 #define BFD_QNT_CORE_INFO 7
7598 #define BFD_QNT_CORE_STATUS 8
7599 #define BFD_QNT_CORE_GREG 9
7600 #define BFD_QNT_CORE_FPREG 10
7603 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
7605 /* Every GREG section has a STATUS section before it. Store the
7606 tid from the previous call to pass down to the next gregs
7608 static pid_t tid = 1;
7612 case BFD_QNT_CORE_INFO:
7613 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7614 case BFD_QNT_CORE_STATUS:
7615 return elfcore_grok_nto_status (abfd, note, &tid);
7616 case BFD_QNT_CORE_GREG:
7617 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
7618 case BFD_QNT_CORE_FPREG:
7619 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
7625 /* Function: elfcore_write_note
7632 size of data for note
7635 End of buffer containing note. */
7638 elfcore_write_note (bfd *abfd,
7646 Elf_External_Note *xnp;
7656 const struct elf_backend_data *bed;
7658 namesz = strlen (name) + 1;
7659 bed = get_elf_backend_data (abfd);
7660 pad = -namesz & ((1 << bed->s->log_file_align) - 1);
7663 newspace = 12 + namesz + pad + size;
7665 p = realloc (buf, *bufsiz + newspace);
7667 *bufsiz += newspace;
7668 xnp = (Elf_External_Note *) dest;
7669 H_PUT_32 (abfd, namesz, xnp->namesz);
7670 H_PUT_32 (abfd, size, xnp->descsz);
7671 H_PUT_32 (abfd, type, xnp->type);
7675 memcpy (dest, name, namesz);
7683 memcpy (dest, input, size);
7687 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7689 elfcore_write_prpsinfo (bfd *abfd,
7696 char *note_name = "CORE";
7698 #if defined (HAVE_PSINFO_T)
7700 note_type = NT_PSINFO;
7703 note_type = NT_PRPSINFO;
7706 memset (&data, 0, sizeof (data));
7707 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
7708 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
7709 return elfcore_write_note (abfd, buf, bufsiz,
7710 note_name, note_type, &data, sizeof (data));
7712 #endif /* PSINFO_T or PRPSINFO_T */
7714 #if defined (HAVE_PRSTATUS_T)
7716 elfcore_write_prstatus (bfd *abfd,
7724 char *note_name = "CORE";
7726 memset (&prstat, 0, sizeof (prstat));
7727 prstat.pr_pid = pid;
7728 prstat.pr_cursig = cursig;
7729 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
7730 return elfcore_write_note (abfd, buf, bufsiz,
7731 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
7733 #endif /* HAVE_PRSTATUS_T */
7735 #if defined (HAVE_LWPSTATUS_T)
7737 elfcore_write_lwpstatus (bfd *abfd,
7744 lwpstatus_t lwpstat;
7745 char *note_name = "CORE";
7747 memset (&lwpstat, 0, sizeof (lwpstat));
7748 lwpstat.pr_lwpid = pid >> 16;
7749 lwpstat.pr_cursig = cursig;
7750 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7751 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
7752 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7754 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
7755 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
7757 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
7758 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
7761 return elfcore_write_note (abfd, buf, bufsiz, note_name,
7762 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
7764 #endif /* HAVE_LWPSTATUS_T */
7766 #if defined (HAVE_PSTATUS_T)
7768 elfcore_write_pstatus (bfd *abfd,
7776 char *note_name = "CORE";
7778 memset (&pstat, 0, sizeof (pstat));
7779 pstat.pr_pid = pid & 0xffff;
7780 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
7781 NT_PSTATUS, &pstat, sizeof (pstat));
7784 #endif /* HAVE_PSTATUS_T */
7787 elfcore_write_prfpreg (bfd *abfd,
7793 char *note_name = "CORE";
7794 return elfcore_write_note (abfd, buf, bufsiz,
7795 note_name, NT_FPREGSET, fpregs, size);
7799 elfcore_write_prxfpreg (bfd *abfd,
7802 const void *xfpregs,
7805 char *note_name = "LINUX";
7806 return elfcore_write_note (abfd, buf, bufsiz,
7807 note_name, NT_PRXFPREG, xfpregs, size);
7811 elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
7819 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
7822 buf = bfd_malloc (size);
7826 if (bfd_bread (buf, size, abfd) != size)
7834 while (p < buf + size)
7836 /* FIXME: bad alignment assumption. */
7837 Elf_External_Note *xnp = (Elf_External_Note *) p;
7838 Elf_Internal_Note in;
7840 in.type = H_GET_32 (abfd, xnp->type);
7842 in.namesz = H_GET_32 (abfd, xnp->namesz);
7843 in.namedata = xnp->name;
7845 in.descsz = H_GET_32 (abfd, xnp->descsz);
7846 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7847 in.descpos = offset + (in.descdata - buf);
7849 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7851 if (! elfcore_grok_netbsd_note (abfd, &in))
7854 else if (strncmp (in.namedata, "QNX", 3) == 0)
7856 if (! elfcore_grok_nto_note (abfd, &in))
7861 if (! elfcore_grok_note (abfd, &in))
7865 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7872 /* Providing external access to the ELF program header table. */
7874 /* Return an upper bound on the number of bytes required to store a
7875 copy of ABFD's program header table entries. Return -1 if an error
7876 occurs; bfd_get_error will return an appropriate code. */
7879 bfd_get_elf_phdr_upper_bound (bfd *abfd)
7881 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7883 bfd_set_error (bfd_error_wrong_format);
7887 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
7890 /* Copy ABFD's program header table entries to *PHDRS. The entries
7891 will be stored as an array of Elf_Internal_Phdr structures, as
7892 defined in include/elf/internal.h. To find out how large the
7893 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7895 Return the number of program header table entries read, or -1 if an
7896 error occurs; bfd_get_error will return an appropriate code. */
7899 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
7903 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7905 bfd_set_error (bfd_error_wrong_format);
7909 num_phdrs = elf_elfheader (abfd)->e_phnum;
7910 memcpy (phdrs, elf_tdata (abfd)->phdr,
7911 num_phdrs * sizeof (Elf_Internal_Phdr));
7917 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
7920 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7922 i_ehdrp = elf_elfheader (abfd);
7923 if (i_ehdrp == NULL)
7924 sprintf_vma (buf, value);
7927 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7929 #if BFD_HOST_64BIT_LONG
7930 sprintf (buf, "%016lx", value);
7932 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
7933 _bfd_int64_low (value));
7937 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
7940 sprintf_vma (buf, value);
7945 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
7948 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7950 i_ehdrp = elf_elfheader (abfd);
7951 if (i_ehdrp == NULL)
7952 fprintf_vma ((FILE *) stream, value);
7955 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7957 #if BFD_HOST_64BIT_LONG
7958 fprintf ((FILE *) stream, "%016lx", value);
7960 fprintf ((FILE *) stream, "%08lx%08lx",
7961 _bfd_int64_high (value), _bfd_int64_low (value));
7965 fprintf ((FILE *) stream, "%08lx",
7966 (unsigned long) (value & 0xffffffff));
7969 fprintf_vma ((FILE *) stream, value);
7973 enum elf_reloc_type_class
7974 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
7976 return reloc_class_normal;
7979 /* For RELA architectures, return the relocation value for a
7980 relocation against a local symbol. */
7983 _bfd_elf_rela_local_sym (bfd *abfd,
7984 Elf_Internal_Sym *sym,
7986 Elf_Internal_Rela *rel)
7988 asection *sec = *psec;
7991 relocation = (sec->output_section->vma
7992 + sec->output_offset
7994 if ((sec->flags & SEC_MERGE)
7995 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
7996 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
7999 _bfd_merged_section_offset (abfd, psec,
8000 elf_section_data (sec)->sec_info,
8001 sym->st_value + rel->r_addend);
8004 /* If we have changed the section, and our original section is
8005 marked with SEC_EXCLUDE, it means that the original
8006 SEC_MERGE section has been completely subsumed in some
8007 other SEC_MERGE section. In this case, we need to leave
8008 some info around for --emit-relocs. */
8009 if ((sec->flags & SEC_EXCLUDE) != 0)
8010 sec->kept_section = *psec;
8013 rel->r_addend -= relocation;
8014 rel->r_addend += sec->output_section->vma + sec->output_offset;
8020 _bfd_elf_rel_local_sym (bfd *abfd,
8021 Elf_Internal_Sym *sym,
8025 asection *sec = *psec;
8027 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
8028 return sym->st_value + addend;
8030 return _bfd_merged_section_offset (abfd, psec,
8031 elf_section_data (sec)->sec_info,
8032 sym->st_value + addend);
8036 _bfd_elf_section_offset (bfd *abfd,
8037 struct bfd_link_info *info,
8041 switch (sec->sec_info_type)
8043 case ELF_INFO_TYPE_STABS:
8044 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
8046 case ELF_INFO_TYPE_EH_FRAME:
8047 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
8053 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8054 reconstruct an ELF file by reading the segments out of remote memory
8055 based on the ELF file header at EHDR_VMA and the ELF program headers it
8056 points to. If not null, *LOADBASEP is filled in with the difference
8057 between the VMAs from which the segments were read, and the VMAs the
8058 file headers (and hence BFD's idea of each section's VMA) put them at.
8060 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8061 remote memory at target address VMA into the local buffer at MYADDR; it
8062 should return zero on success or an `errno' code on failure. TEMPL must
8063 be a BFD for an ELF target with the word size and byte order found in
8064 the remote memory. */
8067 bfd_elf_bfd_from_remote_memory
8071 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
8073 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
8074 (templ, ehdr_vma, loadbasep, target_read_memory);
8078 _bfd_elf_get_synthetic_symtab (bfd *abfd,
8079 long symcount ATTRIBUTE_UNUSED,
8080 asymbol **syms ATTRIBUTE_UNUSED,
8085 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8088 const char *relplt_name;
8089 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8093 Elf_Internal_Shdr *hdr;
8099 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
8102 if (dynsymcount <= 0)
8105 if (!bed->plt_sym_val)
8108 relplt_name = bed->relplt_name;
8109 if (relplt_name == NULL)
8110 relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
8111 relplt = bfd_get_section_by_name (abfd, relplt_name);
8115 hdr = &elf_section_data (relplt)->this_hdr;
8116 if (hdr->sh_link != elf_dynsymtab (abfd)
8117 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
8120 plt = bfd_get_section_by_name (abfd, ".plt");
8124 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8125 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
8128 count = relplt->size / hdr->sh_entsize;
8129 size = count * sizeof (asymbol);
8130 p = relplt->relocation;
8131 for (i = 0; i < count; i++, s++, p++)
8132 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
8134 s = *ret = bfd_malloc (size);
8138 names = (char *) (s + count);
8139 p = relplt->relocation;
8141 for (i = 0; i < count; i++, s++, p++)
8146 addr = bed->plt_sym_val (i, plt, p);
8147 if (addr == (bfd_vma) -1)
8150 *s = **p->sym_ptr_ptr;
8152 s->value = addr - plt->vma;
8154 len = strlen ((*p->sym_ptr_ptr)->name);
8155 memcpy (names, (*p->sym_ptr_ptr)->name, len);
8157 memcpy (names, "@plt", sizeof ("@plt"));
8158 names += sizeof ("@plt");
8165 /* Sort symbol by binding and section. We want to put definitions
8166 sorted by section at the beginning. */
8169 elf_sort_elf_symbol (const void *arg1, const void *arg2)
8171 const Elf_Internal_Sym *s1;
8172 const Elf_Internal_Sym *s2;
8175 /* Make sure that undefined symbols are at the end. */
8176 s1 = (const Elf_Internal_Sym *) arg1;
8177 if (s1->st_shndx == SHN_UNDEF)
8179 s2 = (const Elf_Internal_Sym *) arg2;
8180 if (s2->st_shndx == SHN_UNDEF)
8183 /* Sorted by section index. */
8184 shndx = s1->st_shndx - s2->st_shndx;
8188 /* Sorted by binding. */
8189 return ELF_ST_BIND (s1->st_info) - ELF_ST_BIND (s2->st_info);
8194 Elf_Internal_Sym *sym;
8199 elf_sym_name_compare (const void *arg1, const void *arg2)
8201 const struct elf_symbol *s1 = (const struct elf_symbol *) arg1;
8202 const struct elf_symbol *s2 = (const struct elf_symbol *) arg2;
8203 return strcmp (s1->name, s2->name);
8206 /* Check if 2 sections define the same set of local and global
8210 bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2)
8213 const struct elf_backend_data *bed1, *bed2;
8214 Elf_Internal_Shdr *hdr1, *hdr2;
8215 bfd_size_type symcount1, symcount2;
8216 Elf_Internal_Sym *isymbuf1, *isymbuf2;
8217 Elf_Internal_Sym *isymstart1 = NULL, *isymstart2 = NULL, *isym;
8218 Elf_Internal_Sym *isymend;
8219 struct elf_symbol *symp, *symtable1 = NULL, *symtable2 = NULL;
8220 bfd_size_type count1, count2, i;
8227 /* If both are .gnu.linkonce sections, they have to have the same
8229 if (strncmp (sec1->name, ".gnu.linkonce",
8230 sizeof ".gnu.linkonce" - 1) == 0
8231 && strncmp (sec2->name, ".gnu.linkonce",
8232 sizeof ".gnu.linkonce" - 1) == 0)
8233 return strcmp (sec1->name + sizeof ".gnu.linkonce",
8234 sec2->name + sizeof ".gnu.linkonce") == 0;
8236 /* Both sections have to be in ELF. */
8237 if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour
8238 || bfd_get_flavour (bfd2) != bfd_target_elf_flavour)
8241 if (elf_section_type (sec1) != elf_section_type (sec2))
8244 if ((elf_section_flags (sec1) & SHF_GROUP) != 0
8245 && (elf_section_flags (sec2) & SHF_GROUP) != 0)
8247 /* If both are members of section groups, they have to have the
8249 if (strcmp (elf_group_name (sec1), elf_group_name (sec2)) != 0)
8253 shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1);
8254 shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2);
8255 if (shndx1 == -1 || shndx2 == -1)
8258 bed1 = get_elf_backend_data (bfd1);
8259 bed2 = get_elf_backend_data (bfd2);
8260 hdr1 = &elf_tdata (bfd1)->symtab_hdr;
8261 symcount1 = hdr1->sh_size / bed1->s->sizeof_sym;
8262 hdr2 = &elf_tdata (bfd2)->symtab_hdr;
8263 symcount2 = hdr2->sh_size / bed2->s->sizeof_sym;
8265 if (symcount1 == 0 || symcount2 == 0)
8268 isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0,
8270 isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0,
8274 if (isymbuf1 == NULL || isymbuf2 == NULL)
8277 /* Sort symbols by binding and section. Global definitions are at
8279 qsort (isymbuf1, symcount1, sizeof (Elf_Internal_Sym),
8280 elf_sort_elf_symbol);
8281 qsort (isymbuf2, symcount2, sizeof (Elf_Internal_Sym),
8282 elf_sort_elf_symbol);
8284 /* Count definitions in the section. */
8286 for (isym = isymbuf1, isymend = isym + symcount1;
8287 isym < isymend; isym++)
8289 if (isym->st_shndx == (unsigned int) shndx1)
8296 if (count1 && isym->st_shndx != (unsigned int) shndx1)
8301 for (isym = isymbuf2, isymend = isym + symcount2;
8302 isym < isymend; isym++)
8304 if (isym->st_shndx == (unsigned int) shndx2)
8311 if (count2 && isym->st_shndx != (unsigned int) shndx2)
8315 if (count1 == 0 || count2 == 0 || count1 != count2)
8318 symtable1 = bfd_malloc (count1 * sizeof (struct elf_symbol));
8319 symtable2 = bfd_malloc (count1 * sizeof (struct elf_symbol));
8321 if (symtable1 == NULL || symtable2 == NULL)
8325 for (isym = isymstart1, isymend = isym + count1;
8326 isym < isymend; isym++)
8329 symp->name = bfd_elf_string_from_elf_section (bfd1,
8336 for (isym = isymstart2, isymend = isym + count1;
8337 isym < isymend; isym++)
8340 symp->name = bfd_elf_string_from_elf_section (bfd2,
8346 /* Sort symbol by name. */
8347 qsort (symtable1, count1, sizeof (struct elf_symbol),
8348 elf_sym_name_compare);
8349 qsort (symtable2, count1, sizeof (struct elf_symbol),
8350 elf_sym_name_compare);
8352 for (i = 0; i < count1; i++)
8353 /* Two symbols must have the same binding, type and name. */
8354 if (symtable1 [i].sym->st_info != symtable2 [i].sym->st_info
8355 || symtable1 [i].sym->st_other != symtable2 [i].sym->st_other
8356 || strcmp (symtable1 [i].name, symtable2 [i].name) != 0)