1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005, 2006, 2007 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 /* DT_GNU_HASH hash function. Do not change this function; you will
210 cause invalid hash tables to be generated. */
213 bfd_elf_gnu_hash (const char *namearg)
215 const unsigned char *name = (const unsigned char *) namearg;
216 unsigned long h = 5381;
219 while ((ch = *name++) != '\0')
220 h = (h << 5) + h + ch;
221 return h & 0xffffffff;
225 bfd_elf_mkobject (bfd *abfd)
227 if (abfd->tdata.any == NULL)
229 abfd->tdata.any = bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
230 if (abfd->tdata.any == NULL)
234 elf_tdata (abfd)->program_header_size = (bfd_size_type) -1;
240 bfd_elf_mkcorefile (bfd *abfd)
242 /* I think this can be done just like an object file. */
243 return bfd_elf_mkobject (abfd);
247 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
249 Elf_Internal_Shdr **i_shdrp;
250 bfd_byte *shstrtab = NULL;
252 bfd_size_type shstrtabsize;
254 i_shdrp = elf_elfsections (abfd);
256 || shindex >= elf_numsections (abfd)
257 || i_shdrp[shindex] == 0)
260 shstrtab = i_shdrp[shindex]->contents;
261 if (shstrtab == NULL)
263 /* No cached one, attempt to read, and cache what we read. */
264 offset = i_shdrp[shindex]->sh_offset;
265 shstrtabsize = i_shdrp[shindex]->sh_size;
267 /* Allocate and clear an extra byte at the end, to prevent crashes
268 in case the string table is not terminated. */
269 if (shstrtabsize + 1 == 0
270 || (shstrtab = bfd_alloc (abfd, shstrtabsize + 1)) == NULL
271 || bfd_seek (abfd, offset, SEEK_SET) != 0)
273 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
275 if (bfd_get_error () != bfd_error_system_call)
276 bfd_set_error (bfd_error_file_truncated);
280 shstrtab[shstrtabsize] = '\0';
281 i_shdrp[shindex]->contents = shstrtab;
283 return (char *) shstrtab;
287 bfd_elf_string_from_elf_section (bfd *abfd,
288 unsigned int shindex,
289 unsigned int strindex)
291 Elf_Internal_Shdr *hdr;
296 if (elf_elfsections (abfd) == NULL || shindex >= elf_numsections (abfd))
299 hdr = elf_elfsections (abfd)[shindex];
301 if (hdr->contents == NULL
302 && bfd_elf_get_str_section (abfd, shindex) == NULL)
305 if (strindex >= hdr->sh_size)
307 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
308 (*_bfd_error_handler)
309 (_("%B: invalid string offset %u >= %lu for section `%s'"),
310 abfd, strindex, (unsigned long) hdr->sh_size,
311 (shindex == shstrndx && strindex == hdr->sh_name
313 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
317 return ((char *) hdr->contents) + strindex;
320 /* Read and convert symbols to internal format.
321 SYMCOUNT specifies the number of symbols to read, starting from
322 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
323 are non-NULL, they are used to store the internal symbols, external
324 symbols, and symbol section index extensions, respectively. */
327 bfd_elf_get_elf_syms (bfd *ibfd,
328 Elf_Internal_Shdr *symtab_hdr,
331 Elf_Internal_Sym *intsym_buf,
333 Elf_External_Sym_Shndx *extshndx_buf)
335 Elf_Internal_Shdr *shndx_hdr;
337 const bfd_byte *esym;
338 Elf_External_Sym_Shndx *alloc_extshndx;
339 Elf_External_Sym_Shndx *shndx;
340 Elf_Internal_Sym *isym;
341 Elf_Internal_Sym *isymend;
342 const struct elf_backend_data *bed;
350 /* Normal syms might have section extension entries. */
352 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
353 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
355 /* Read the symbols. */
357 alloc_extshndx = NULL;
358 bed = get_elf_backend_data (ibfd);
359 extsym_size = bed->s->sizeof_sym;
360 amt = symcount * extsym_size;
361 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
362 if (extsym_buf == NULL)
364 alloc_ext = bfd_malloc2 (symcount, extsym_size);
365 extsym_buf = alloc_ext;
367 if (extsym_buf == NULL
368 || bfd_seek (ibfd, pos, SEEK_SET) != 0
369 || bfd_bread (extsym_buf, amt, ibfd) != amt)
375 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
379 amt = symcount * sizeof (Elf_External_Sym_Shndx);
380 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
381 if (extshndx_buf == NULL)
383 alloc_extshndx = bfd_malloc2 (symcount,
384 sizeof (Elf_External_Sym_Shndx));
385 extshndx_buf = alloc_extshndx;
387 if (extshndx_buf == NULL
388 || bfd_seek (ibfd, pos, SEEK_SET) != 0
389 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
396 if (intsym_buf == NULL)
398 intsym_buf = bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
399 if (intsym_buf == NULL)
403 /* Convert the symbols to internal form. */
404 isymend = intsym_buf + symcount;
405 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
407 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
408 if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym))
410 symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size;
411 (*_bfd_error_handler) (_("%B symbol number %lu references "
412 "nonexistent SHT_SYMTAB_SHNDX section"),
413 ibfd, (unsigned long) symoffset);
419 if (alloc_ext != NULL)
421 if (alloc_extshndx != NULL)
422 free (alloc_extshndx);
427 /* Look up a symbol name. */
429 bfd_elf_sym_name (bfd *abfd,
430 Elf_Internal_Shdr *symtab_hdr,
431 Elf_Internal_Sym *isym,
435 unsigned int iname = isym->st_name;
436 unsigned int shindex = symtab_hdr->sh_link;
438 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
439 /* Check for a bogus st_shndx to avoid crashing. */
440 && isym->st_shndx < elf_numsections (abfd)
441 && !(isym->st_shndx >= SHN_LORESERVE && isym->st_shndx <= SHN_HIRESERVE))
443 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
444 shindex = elf_elfheader (abfd)->e_shstrndx;
447 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
450 else if (sym_sec && *name == '\0')
451 name = bfd_section_name (abfd, sym_sec);
456 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
457 sections. The first element is the flags, the rest are section
460 typedef union elf_internal_group {
461 Elf_Internal_Shdr *shdr;
463 } Elf_Internal_Group;
465 /* Return the name of the group signature symbol. Why isn't the
466 signature just a string? */
469 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
471 Elf_Internal_Shdr *hdr;
472 unsigned char esym[sizeof (Elf64_External_Sym)];
473 Elf_External_Sym_Shndx eshndx;
474 Elf_Internal_Sym isym;
476 /* First we need to ensure the symbol table is available. Make sure
477 that it is a symbol table section. */
478 hdr = elf_elfsections (abfd) [ghdr->sh_link];
479 if (hdr->sh_type != SHT_SYMTAB
480 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
483 /* Go read the symbol. */
484 hdr = &elf_tdata (abfd)->symtab_hdr;
485 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
486 &isym, esym, &eshndx) == NULL)
489 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
492 /* Set next_in_group list pointer, and group name for NEWSECT. */
495 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
497 unsigned int num_group = elf_tdata (abfd)->num_group;
499 /* If num_group is zero, read in all SHT_GROUP sections. The count
500 is set to -1 if there are no SHT_GROUP sections. */
503 unsigned int i, shnum;
505 /* First count the number of groups. If we have a SHT_GROUP
506 section with just a flag word (ie. sh_size is 4), ignore it. */
507 shnum = elf_numsections (abfd);
510 #define IS_VALID_GROUP_SECTION_HEADER(shdr) \
511 ( (shdr)->sh_type == SHT_GROUP \
512 && (shdr)->sh_size >= (2 * GRP_ENTRY_SIZE) \
513 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
514 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
516 for (i = 0; i < shnum; i++)
518 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
520 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
526 num_group = (unsigned) -1;
527 elf_tdata (abfd)->num_group = num_group;
531 /* We keep a list of elf section headers for group sections,
532 so we can find them quickly. */
535 elf_tdata (abfd)->num_group = num_group;
536 elf_tdata (abfd)->group_sect_ptr
537 = bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
538 if (elf_tdata (abfd)->group_sect_ptr == NULL)
542 for (i = 0; i < shnum; i++)
544 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
546 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
549 Elf_Internal_Group *dest;
551 /* Add to list of sections. */
552 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
555 /* Read the raw contents. */
556 BFD_ASSERT (sizeof (*dest) >= 4);
557 amt = shdr->sh_size * sizeof (*dest) / 4;
558 shdr->contents = bfd_alloc2 (abfd, shdr->sh_size,
560 /* PR binutils/4110: Handle corrupt group headers. */
561 if (shdr->contents == NULL)
564 (_("%B: Corrupt size field in group section header: 0x%lx"), abfd, shdr->sh_size);
565 bfd_set_error (bfd_error_bad_value);
569 memset (shdr->contents, 0, amt);
571 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
572 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
576 /* Translate raw contents, a flag word followed by an
577 array of elf section indices all in target byte order,
578 to the flag word followed by an array of elf section
580 src = shdr->contents + shdr->sh_size;
581 dest = (Elf_Internal_Group *) (shdr->contents + amt);
588 idx = H_GET_32 (abfd, src);
589 if (src == shdr->contents)
592 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
593 shdr->bfd_section->flags
594 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
599 ((*_bfd_error_handler)
600 (_("%B: invalid SHT_GROUP entry"), abfd));
603 dest->shdr = elf_elfsections (abfd)[idx];
610 if (num_group != (unsigned) -1)
614 for (i = 0; i < num_group; i++)
616 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
617 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
618 unsigned int n_elt = shdr->sh_size / 4;
620 /* Look through this group's sections to see if current
621 section is a member. */
623 if ((++idx)->shdr == hdr)
627 /* We are a member of this group. Go looking through
628 other members to see if any others are linked via
630 idx = (Elf_Internal_Group *) shdr->contents;
631 n_elt = shdr->sh_size / 4;
633 if ((s = (++idx)->shdr->bfd_section) != NULL
634 && elf_next_in_group (s) != NULL)
638 /* Snarf the group name from other member, and
639 insert current section in circular list. */
640 elf_group_name (newsect) = elf_group_name (s);
641 elf_next_in_group (newsect) = elf_next_in_group (s);
642 elf_next_in_group (s) = newsect;
648 gname = group_signature (abfd, shdr);
651 elf_group_name (newsect) = gname;
653 /* Start a circular list with one element. */
654 elf_next_in_group (newsect) = newsect;
657 /* If the group section has been created, point to the
659 if (shdr->bfd_section != NULL)
660 elf_next_in_group (shdr->bfd_section) = newsect;
668 if (elf_group_name (newsect) == NULL)
670 (*_bfd_error_handler) (_("%B: no group info for section %A"),
677 _bfd_elf_setup_sections (bfd *abfd)
680 unsigned int num_group = elf_tdata (abfd)->num_group;
681 bfd_boolean result = TRUE;
684 /* Process SHF_LINK_ORDER. */
685 for (s = abfd->sections; s != NULL; s = s->next)
687 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
688 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
690 unsigned int elfsec = this_hdr->sh_link;
691 /* FIXME: The old Intel compiler and old strip/objcopy may
692 not set the sh_link or sh_info fields. Hence we could
693 get the situation where elfsec is 0. */
696 const struct elf_backend_data *bed
697 = get_elf_backend_data (abfd);
698 if (bed->link_order_error_handler)
699 bed->link_order_error_handler
700 (_("%B: warning: sh_link not set for section `%A'"),
707 this_hdr = elf_elfsections (abfd)[elfsec];
710 Some strip/objcopy may leave an incorrect value in
711 sh_link. We don't want to proceed. */
712 link = this_hdr->bfd_section;
715 (*_bfd_error_handler)
716 (_("%B: sh_link [%d] in section `%A' is incorrect"),
717 s->owner, s, elfsec);
721 elf_linked_to_section (s) = link;
726 /* Process section groups. */
727 if (num_group == (unsigned) -1)
730 for (i = 0; i < num_group; i++)
732 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
733 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
734 unsigned int n_elt = shdr->sh_size / 4;
737 if ((++idx)->shdr->bfd_section)
738 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
739 else if (idx->shdr->sh_type == SHT_RELA
740 || idx->shdr->sh_type == SHT_REL)
741 /* We won't include relocation sections in section groups in
742 output object files. We adjust the group section size here
743 so that relocatable link will work correctly when
744 relocation sections are in section group in input object
746 shdr->bfd_section->size -= 4;
749 /* There are some unknown sections in the group. */
750 (*_bfd_error_handler)
751 (_("%B: unknown [%d] section `%s' in group [%s]"),
753 (unsigned int) idx->shdr->sh_type,
754 bfd_elf_string_from_elf_section (abfd,
755 (elf_elfheader (abfd)
758 shdr->bfd_section->name);
766 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
768 return elf_next_in_group (sec) != NULL;
771 /* Make a BFD section from an ELF section. We store a pointer to the
772 BFD section in the bfd_section field of the header. */
775 _bfd_elf_make_section_from_shdr (bfd *abfd,
776 Elf_Internal_Shdr *hdr,
782 const struct elf_backend_data *bed;
784 if (hdr->bfd_section != NULL)
786 BFD_ASSERT (strcmp (name,
787 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
791 newsect = bfd_make_section_anyway (abfd, name);
795 hdr->bfd_section = newsect;
796 elf_section_data (newsect)->this_hdr = *hdr;
797 elf_section_data (newsect)->this_idx = shindex;
799 /* Always use the real type/flags. */
800 elf_section_type (newsect) = hdr->sh_type;
801 elf_section_flags (newsect) = hdr->sh_flags;
803 newsect->filepos = hdr->sh_offset;
805 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
806 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
807 || ! bfd_set_section_alignment (abfd, newsect,
808 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
811 flags = SEC_NO_FLAGS;
812 if (hdr->sh_type != SHT_NOBITS)
813 flags |= SEC_HAS_CONTENTS;
814 if (hdr->sh_type == SHT_GROUP)
815 flags |= SEC_GROUP | SEC_EXCLUDE;
816 if ((hdr->sh_flags & SHF_ALLOC) != 0)
819 if (hdr->sh_type != SHT_NOBITS)
822 if ((hdr->sh_flags & SHF_WRITE) == 0)
823 flags |= SEC_READONLY;
824 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
826 else if ((flags & SEC_LOAD) != 0)
828 if ((hdr->sh_flags & SHF_MERGE) != 0)
831 newsect->entsize = hdr->sh_entsize;
832 if ((hdr->sh_flags & SHF_STRINGS) != 0)
833 flags |= SEC_STRINGS;
835 if (hdr->sh_flags & SHF_GROUP)
836 if (!setup_group (abfd, hdr, newsect))
838 if ((hdr->sh_flags & SHF_TLS) != 0)
839 flags |= SEC_THREAD_LOCAL;
841 if ((flags & SEC_ALLOC) == 0)
843 /* The debugging sections appear to be recognized only by name,
844 not any sort of flag. Their SEC_ALLOC bits are cleared. */
849 } debug_sections [] =
851 { STRING_COMMA_LEN ("debug") }, /* 'd' */
852 { NULL, 0 }, /* 'e' */
853 { NULL, 0 }, /* 'f' */
854 { STRING_COMMA_LEN ("gnu.linkonce.wi.") }, /* 'g' */
855 { NULL, 0 }, /* 'h' */
856 { NULL, 0 }, /* 'i' */
857 { NULL, 0 }, /* 'j' */
858 { NULL, 0 }, /* 'k' */
859 { STRING_COMMA_LEN ("line") }, /* 'l' */
860 { NULL, 0 }, /* 'm' */
861 { NULL, 0 }, /* 'n' */
862 { NULL, 0 }, /* 'o' */
863 { NULL, 0 }, /* 'p' */
864 { NULL, 0 }, /* 'q' */
865 { NULL, 0 }, /* 'r' */
866 { STRING_COMMA_LEN ("stab") } /* 's' */
871 int i = name [1] - 'd';
873 && i < (int) ARRAY_SIZE (debug_sections)
874 && debug_sections [i].name != NULL
875 && strncmp (&name [1], debug_sections [i].name,
876 debug_sections [i].len) == 0)
877 flags |= SEC_DEBUGGING;
881 /* As a GNU extension, if the name begins with .gnu.linkonce, we
882 only link a single copy of the section. This is used to support
883 g++. g++ will emit each template expansion in its own section.
884 The symbols will be defined as weak, so that multiple definitions
885 are permitted. The GNU linker extension is to actually discard
886 all but one of the sections. */
887 if (CONST_STRNEQ (name, ".gnu.linkonce")
888 && elf_next_in_group (newsect) == NULL)
889 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
891 bed = get_elf_backend_data (abfd);
892 if (bed->elf_backend_section_flags)
893 if (! bed->elf_backend_section_flags (&flags, hdr))
896 if (! bfd_set_section_flags (abfd, newsect, flags))
899 if ((flags & SEC_ALLOC) != 0)
901 Elf_Internal_Phdr *phdr;
904 /* Look through the phdrs to see if we need to adjust the lma.
905 If all the p_paddr fields are zero, we ignore them, since
906 some ELF linkers produce such output. */
907 phdr = elf_tdata (abfd)->phdr;
908 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
910 if (phdr->p_paddr != 0)
913 if (i < elf_elfheader (abfd)->e_phnum)
915 phdr = elf_tdata (abfd)->phdr;
916 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
918 /* This section is part of this segment if its file
919 offset plus size lies within the segment's memory
920 span and, if the section is loaded, the extent of the
921 loaded data lies within the extent of the segment.
923 Note - we used to check the p_paddr field as well, and
924 refuse to set the LMA if it was 0. This is wrong
925 though, as a perfectly valid initialised segment can
926 have a p_paddr of zero. Some architectures, eg ARM,
927 place special significance on the address 0 and
928 executables need to be able to have a segment which
929 covers this address. */
930 if (phdr->p_type == PT_LOAD
931 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
932 && (hdr->sh_offset + hdr->sh_size
933 <= phdr->p_offset + phdr->p_memsz)
934 && ((flags & SEC_LOAD) == 0
935 || (hdr->sh_offset + hdr->sh_size
936 <= phdr->p_offset + phdr->p_filesz)))
938 if ((flags & SEC_LOAD) == 0)
939 newsect->lma = (phdr->p_paddr
940 + hdr->sh_addr - phdr->p_vaddr);
942 /* We used to use the same adjustment for SEC_LOAD
943 sections, but that doesn't work if the segment
944 is packed with code from multiple VMAs.
945 Instead we calculate the section LMA based on
946 the segment LMA. It is assumed that the
947 segment will contain sections with contiguous
948 LMAs, even if the VMAs are not. */
949 newsect->lma = (phdr->p_paddr
950 + hdr->sh_offset - phdr->p_offset);
952 /* With contiguous segments, we can't tell from file
953 offsets whether a section with zero size should
954 be placed at the end of one segment or the
955 beginning of the next. Decide based on vaddr. */
956 if (hdr->sh_addr >= phdr->p_vaddr
957 && (hdr->sh_addr + hdr->sh_size
958 <= phdr->p_vaddr + phdr->p_memsz))
973 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
976 Helper functions for GDB to locate the string tables.
977 Since BFD hides string tables from callers, GDB needs to use an
978 internal hook to find them. Sun's .stabstr, in particular,
979 isn't even pointed to by the .stab section, so ordinary
980 mechanisms wouldn't work to find it, even if we had some.
983 struct elf_internal_shdr *
984 bfd_elf_find_section (bfd *abfd, char *name)
986 Elf_Internal_Shdr **i_shdrp;
991 i_shdrp = elf_elfsections (abfd);
994 shstrtab = bfd_elf_get_str_section (abfd,
995 elf_elfheader (abfd)->e_shstrndx);
996 if (shstrtab != NULL)
998 max = elf_numsections (abfd);
999 for (i = 1; i < max; i++)
1000 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
1007 const char *const bfd_elf_section_type_names[] = {
1008 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1009 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1010 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1013 /* ELF relocs are against symbols. If we are producing relocatable
1014 output, and the reloc is against an external symbol, and nothing
1015 has given us any additional addend, the resulting reloc will also
1016 be against the same symbol. In such a case, we don't want to
1017 change anything about the way the reloc is handled, since it will
1018 all be done at final link time. Rather than put special case code
1019 into bfd_perform_relocation, all the reloc types use this howto
1020 function. It just short circuits the reloc if producing
1021 relocatable output against an external symbol. */
1023 bfd_reloc_status_type
1024 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1025 arelent *reloc_entry,
1027 void *data ATTRIBUTE_UNUSED,
1028 asection *input_section,
1030 char **error_message ATTRIBUTE_UNUSED)
1032 if (output_bfd != NULL
1033 && (symbol->flags & BSF_SECTION_SYM) == 0
1034 && (! reloc_entry->howto->partial_inplace
1035 || reloc_entry->addend == 0))
1037 reloc_entry->address += input_section->output_offset;
1038 return bfd_reloc_ok;
1041 return bfd_reloc_continue;
1044 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
1047 merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED,
1050 BFD_ASSERT (sec->sec_info_type == ELF_INFO_TYPE_MERGE);
1051 sec->sec_info_type = ELF_INFO_TYPE_NONE;
1054 /* Finish SHF_MERGE section merging. */
1057 _bfd_elf_merge_sections (bfd *abfd, struct bfd_link_info *info)
1062 if (!is_elf_hash_table (info->hash))
1065 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1066 if ((ibfd->flags & DYNAMIC) == 0)
1067 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
1068 if ((sec->flags & SEC_MERGE) != 0
1069 && !bfd_is_abs_section (sec->output_section))
1071 struct bfd_elf_section_data *secdata;
1073 secdata = elf_section_data (sec);
1074 if (! _bfd_add_merge_section (abfd,
1075 &elf_hash_table (info)->merge_info,
1076 sec, &secdata->sec_info))
1078 else if (secdata->sec_info)
1079 sec->sec_info_type = ELF_INFO_TYPE_MERGE;
1082 if (elf_hash_table (info)->merge_info != NULL)
1083 _bfd_merge_sections (abfd, info, elf_hash_table (info)->merge_info,
1084 merge_sections_remove_hook);
1089 _bfd_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
1091 sec->output_section = bfd_abs_section_ptr;
1092 sec->output_offset = sec->vma;
1093 if (!is_elf_hash_table (info->hash))
1096 sec->sec_info_type = ELF_INFO_TYPE_JUST_SYMS;
1099 /* Copy the program header and other data from one object module to
1103 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1105 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1106 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1109 BFD_ASSERT (!elf_flags_init (obfd)
1110 || (elf_elfheader (obfd)->e_flags
1111 == elf_elfheader (ibfd)->e_flags));
1113 elf_gp (obfd) = elf_gp (ibfd);
1114 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1115 elf_flags_init (obfd) = TRUE;
1120 get_segment_type (unsigned int p_type)
1125 case PT_NULL: pt = "NULL"; break;
1126 case PT_LOAD: pt = "LOAD"; break;
1127 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1128 case PT_INTERP: pt = "INTERP"; break;
1129 case PT_NOTE: pt = "NOTE"; break;
1130 case PT_SHLIB: pt = "SHLIB"; break;
1131 case PT_PHDR: pt = "PHDR"; break;
1132 case PT_TLS: pt = "TLS"; break;
1133 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1134 case PT_GNU_STACK: pt = "STACK"; break;
1135 case PT_GNU_RELRO: pt = "RELRO"; break;
1136 default: pt = NULL; break;
1141 /* Print out the program headers. */
1144 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1147 Elf_Internal_Phdr *p;
1149 bfd_byte *dynbuf = NULL;
1151 p = elf_tdata (abfd)->phdr;
1156 fprintf (f, _("\nProgram Header:\n"));
1157 c = elf_elfheader (abfd)->e_phnum;
1158 for (i = 0; i < c; i++, p++)
1160 const char *pt = get_segment_type (p->p_type);
1165 sprintf (buf, "0x%lx", p->p_type);
1168 fprintf (f, "%8s off 0x", pt);
1169 bfd_fprintf_vma (abfd, f, p->p_offset);
1170 fprintf (f, " vaddr 0x");
1171 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1172 fprintf (f, " paddr 0x");
1173 bfd_fprintf_vma (abfd, f, p->p_paddr);
1174 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1175 fprintf (f, " filesz 0x");
1176 bfd_fprintf_vma (abfd, f, p->p_filesz);
1177 fprintf (f, " memsz 0x");
1178 bfd_fprintf_vma (abfd, f, p->p_memsz);
1179 fprintf (f, " flags %c%c%c",
1180 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1181 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1182 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1183 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1184 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1189 s = bfd_get_section_by_name (abfd, ".dynamic");
1193 unsigned long shlink;
1194 bfd_byte *extdyn, *extdynend;
1196 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1198 fprintf (f, _("\nDynamic Section:\n"));
1200 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1203 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1206 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1208 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1209 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1212 extdynend = extdyn + s->size;
1213 for (; extdyn < extdynend; extdyn += extdynsize)
1215 Elf_Internal_Dyn dyn;
1218 bfd_boolean stringp;
1220 (*swap_dyn_in) (abfd, extdyn, &dyn);
1222 if (dyn.d_tag == DT_NULL)
1229 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1233 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1234 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1235 case DT_PLTGOT: name = "PLTGOT"; break;
1236 case DT_HASH: name = "HASH"; break;
1237 case DT_STRTAB: name = "STRTAB"; break;
1238 case DT_SYMTAB: name = "SYMTAB"; break;
1239 case DT_RELA: name = "RELA"; break;
1240 case DT_RELASZ: name = "RELASZ"; break;
1241 case DT_RELAENT: name = "RELAENT"; break;
1242 case DT_STRSZ: name = "STRSZ"; break;
1243 case DT_SYMENT: name = "SYMENT"; break;
1244 case DT_INIT: name = "INIT"; break;
1245 case DT_FINI: name = "FINI"; break;
1246 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1247 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1248 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1249 case DT_REL: name = "REL"; break;
1250 case DT_RELSZ: name = "RELSZ"; break;
1251 case DT_RELENT: name = "RELENT"; break;
1252 case DT_PLTREL: name = "PLTREL"; break;
1253 case DT_DEBUG: name = "DEBUG"; break;
1254 case DT_TEXTREL: name = "TEXTREL"; break;
1255 case DT_JMPREL: name = "JMPREL"; break;
1256 case DT_BIND_NOW: name = "BIND_NOW"; break;
1257 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1258 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1259 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1260 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1261 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1262 case DT_FLAGS: name = "FLAGS"; break;
1263 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1264 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1265 case DT_CHECKSUM: name = "CHECKSUM"; break;
1266 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1267 case DT_MOVEENT: name = "MOVEENT"; break;
1268 case DT_MOVESZ: name = "MOVESZ"; break;
1269 case DT_FEATURE: name = "FEATURE"; break;
1270 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1271 case DT_SYMINSZ: name = "SYMINSZ"; break;
1272 case DT_SYMINENT: name = "SYMINENT"; break;
1273 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1274 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1275 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1276 case DT_PLTPAD: name = "PLTPAD"; break;
1277 case DT_MOVETAB: name = "MOVETAB"; break;
1278 case DT_SYMINFO: name = "SYMINFO"; break;
1279 case DT_RELACOUNT: name = "RELACOUNT"; break;
1280 case DT_RELCOUNT: name = "RELCOUNT"; break;
1281 case DT_FLAGS_1: name = "FLAGS_1"; break;
1282 case DT_VERSYM: name = "VERSYM"; break;
1283 case DT_VERDEF: name = "VERDEF"; break;
1284 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1285 case DT_VERNEED: name = "VERNEED"; break;
1286 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1287 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1288 case DT_USED: name = "USED"; break;
1289 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1290 case DT_GNU_HASH: name = "GNU_HASH"; break;
1293 fprintf (f, " %-11s ", name);
1295 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1299 unsigned int tagv = dyn.d_un.d_val;
1301 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1304 fprintf (f, "%s", string);
1313 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1314 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1316 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1320 if (elf_dynverdef (abfd) != 0)
1322 Elf_Internal_Verdef *t;
1324 fprintf (f, _("\nVersion definitions:\n"));
1325 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1327 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1328 t->vd_flags, t->vd_hash,
1329 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1330 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1332 Elf_Internal_Verdaux *a;
1335 for (a = t->vd_auxptr->vda_nextptr;
1339 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1345 if (elf_dynverref (abfd) != 0)
1347 Elf_Internal_Verneed *t;
1349 fprintf (f, _("\nVersion References:\n"));
1350 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1352 Elf_Internal_Vernaux *a;
1354 fprintf (f, _(" required from %s:\n"),
1355 t->vn_filename ? t->vn_filename : "<corrupt>");
1356 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1357 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1358 a->vna_flags, a->vna_other,
1359 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1371 /* Display ELF-specific fields of a symbol. */
1374 bfd_elf_print_symbol (bfd *abfd,
1377 bfd_print_symbol_type how)
1382 case bfd_print_symbol_name:
1383 fprintf (file, "%s", symbol->name);
1385 case bfd_print_symbol_more:
1386 fprintf (file, "elf ");
1387 bfd_fprintf_vma (abfd, file, symbol->value);
1388 fprintf (file, " %lx", (long) symbol->flags);
1390 case bfd_print_symbol_all:
1392 const char *section_name;
1393 const char *name = NULL;
1394 const struct elf_backend_data *bed;
1395 unsigned char st_other;
1398 section_name = symbol->section ? symbol->section->name : "(*none*)";
1400 bed = get_elf_backend_data (abfd);
1401 if (bed->elf_backend_print_symbol_all)
1402 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1406 name = symbol->name;
1407 bfd_print_symbol_vandf (abfd, file, symbol);
1410 fprintf (file, " %s\t", section_name);
1411 /* Print the "other" value for a symbol. For common symbols,
1412 we've already printed the size; now print the alignment.
1413 For other symbols, we have no specified alignment, and
1414 we've printed the address; now print the size. */
1415 if (bfd_is_com_section (symbol->section))
1416 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1418 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1419 bfd_fprintf_vma (abfd, file, val);
1421 /* If we have version information, print it. */
1422 if (elf_tdata (abfd)->dynversym_section != 0
1423 && (elf_tdata (abfd)->dynverdef_section != 0
1424 || elf_tdata (abfd)->dynverref_section != 0))
1426 unsigned int vernum;
1427 const char *version_string;
1429 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1432 version_string = "";
1433 else if (vernum == 1)
1434 version_string = "Base";
1435 else if (vernum <= elf_tdata (abfd)->cverdefs)
1437 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1440 Elf_Internal_Verneed *t;
1442 version_string = "";
1443 for (t = elf_tdata (abfd)->verref;
1447 Elf_Internal_Vernaux *a;
1449 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1451 if (a->vna_other == vernum)
1453 version_string = a->vna_nodename;
1460 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1461 fprintf (file, " %-11s", version_string);
1466 fprintf (file, " (%s)", version_string);
1467 for (i = 10 - strlen (version_string); i > 0; --i)
1472 /* If the st_other field is not zero, print it. */
1473 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1478 case STV_INTERNAL: fprintf (file, " .internal"); break;
1479 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1480 case STV_PROTECTED: fprintf (file, " .protected"); break;
1482 /* Some other non-defined flags are also present, so print
1484 fprintf (file, " 0x%02x", (unsigned int) st_other);
1487 fprintf (file, " %s", name);
1493 /* Create an entry in an ELF linker hash table. */
1495 struct bfd_hash_entry *
1496 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
1497 struct bfd_hash_table *table,
1500 /* Allocate the structure if it has not already been allocated by a
1504 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1509 /* Call the allocation method of the superclass. */
1510 entry = _bfd_link_hash_newfunc (entry, table, string);
1513 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1514 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1516 /* Set local fields. */
1519 ret->got = htab->init_got_refcount;
1520 ret->plt = htab->init_plt_refcount;
1521 memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry)
1522 - offsetof (struct elf_link_hash_entry, size)));
1523 /* Assume that we have been called by a non-ELF symbol reader.
1524 This flag is then reset by the code which reads an ELF input
1525 file. This ensures that a symbol created by a non-ELF symbol
1526 reader will have the flag set correctly. */
1533 /* Copy data from an indirect symbol to its direct symbol, hiding the
1534 old indirect symbol. Also used for copying flags to a weakdef. */
1537 _bfd_elf_link_hash_copy_indirect (struct bfd_link_info *info,
1538 struct elf_link_hash_entry *dir,
1539 struct elf_link_hash_entry *ind)
1541 struct elf_link_hash_table *htab;
1543 /* Copy down any references that we may have already seen to the
1544 symbol which just became indirect. */
1546 dir->ref_dynamic |= ind->ref_dynamic;
1547 dir->ref_regular |= ind->ref_regular;
1548 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1549 dir->non_got_ref |= ind->non_got_ref;
1550 dir->needs_plt |= ind->needs_plt;
1551 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1553 if (ind->root.type != bfd_link_hash_indirect)
1556 /* Copy over the global and procedure linkage table refcount entries.
1557 These may have been already set up by a check_relocs routine. */
1558 htab = elf_hash_table (info);
1559 if (ind->got.refcount > htab->init_got_refcount.refcount)
1561 if (dir->got.refcount < 0)
1562 dir->got.refcount = 0;
1563 dir->got.refcount += ind->got.refcount;
1564 ind->got.refcount = htab->init_got_refcount.refcount;
1567 if (ind->plt.refcount > htab->init_plt_refcount.refcount)
1569 if (dir->plt.refcount < 0)
1570 dir->plt.refcount = 0;
1571 dir->plt.refcount += ind->plt.refcount;
1572 ind->plt.refcount = htab->init_plt_refcount.refcount;
1575 if (ind->dynindx != -1)
1577 if (dir->dynindx != -1)
1578 _bfd_elf_strtab_delref (htab->dynstr, dir->dynstr_index);
1579 dir->dynindx = ind->dynindx;
1580 dir->dynstr_index = ind->dynstr_index;
1582 ind->dynstr_index = 0;
1587 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info,
1588 struct elf_link_hash_entry *h,
1589 bfd_boolean force_local)
1591 h->plt = elf_hash_table (info)->init_plt_offset;
1595 h->forced_local = 1;
1596 if (h->dynindx != -1)
1599 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1605 /* Initialize an ELF linker hash table. */
1608 _bfd_elf_link_hash_table_init
1609 (struct elf_link_hash_table *table,
1611 struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
1612 struct bfd_hash_table *,
1614 unsigned int entsize)
1617 int can_refcount = get_elf_backend_data (abfd)->can_refcount;
1619 memset (table, 0, sizeof * table);
1620 table->init_got_refcount.refcount = can_refcount - 1;
1621 table->init_plt_refcount.refcount = can_refcount - 1;
1622 table->init_got_offset.offset = -(bfd_vma) 1;
1623 table->init_plt_offset.offset = -(bfd_vma) 1;
1624 /* The first dynamic symbol is a dummy. */
1625 table->dynsymcount = 1;
1627 ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
1628 table->root.type = bfd_link_elf_hash_table;
1633 /* Create an ELF linker hash table. */
1635 struct bfd_link_hash_table *
1636 _bfd_elf_link_hash_table_create (bfd *abfd)
1638 struct elf_link_hash_table *ret;
1639 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1641 ret = bfd_malloc (amt);
1645 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc,
1646 sizeof (struct elf_link_hash_entry)))
1655 /* This is a hook for the ELF emulation code in the generic linker to
1656 tell the backend linker what file name to use for the DT_NEEDED
1657 entry for a dynamic object. */
1660 bfd_elf_set_dt_needed_name (bfd *abfd, const char *name)
1662 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1663 && bfd_get_format (abfd) == bfd_object)
1664 elf_dt_name (abfd) = name;
1668 bfd_elf_get_dyn_lib_class (bfd *abfd)
1671 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1672 && bfd_get_format (abfd) == bfd_object)
1673 lib_class = elf_dyn_lib_class (abfd);
1680 bfd_elf_set_dyn_lib_class (bfd *abfd, enum dynamic_lib_link_class lib_class)
1682 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1683 && bfd_get_format (abfd) == bfd_object)
1684 elf_dyn_lib_class (abfd) = lib_class;
1687 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1688 the linker ELF emulation code. */
1690 struct bfd_link_needed_list *
1691 bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED,
1692 struct bfd_link_info *info)
1694 if (! is_elf_hash_table (info->hash))
1696 return elf_hash_table (info)->needed;
1699 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1700 hook for the linker ELF emulation code. */
1702 struct bfd_link_needed_list *
1703 bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED,
1704 struct bfd_link_info *info)
1706 if (! is_elf_hash_table (info->hash))
1708 return elf_hash_table (info)->runpath;
1711 /* Get the name actually used for a dynamic object for a link. This
1712 is the SONAME entry if there is one. Otherwise, it is the string
1713 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1716 bfd_elf_get_dt_soname (bfd *abfd)
1718 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1719 && bfd_get_format (abfd) == bfd_object)
1720 return elf_dt_name (abfd);
1724 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1725 the ELF linker emulation code. */
1728 bfd_elf_get_bfd_needed_list (bfd *abfd,
1729 struct bfd_link_needed_list **pneeded)
1732 bfd_byte *dynbuf = NULL;
1734 unsigned long shlink;
1735 bfd_byte *extdyn, *extdynend;
1737 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1741 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1742 || bfd_get_format (abfd) != bfd_object)
1745 s = bfd_get_section_by_name (abfd, ".dynamic");
1746 if (s == NULL || s->size == 0)
1749 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1752 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1756 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1758 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1759 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1762 extdynend = extdyn + s->size;
1763 for (; extdyn < extdynend; extdyn += extdynsize)
1765 Elf_Internal_Dyn dyn;
1767 (*swap_dyn_in) (abfd, extdyn, &dyn);
1769 if (dyn.d_tag == DT_NULL)
1772 if (dyn.d_tag == DT_NEEDED)
1775 struct bfd_link_needed_list *l;
1776 unsigned int tagv = dyn.d_un.d_val;
1779 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1784 l = bfd_alloc (abfd, amt);
1805 /* Allocate an ELF string table--force the first byte to be zero. */
1807 struct bfd_strtab_hash *
1808 _bfd_elf_stringtab_init (void)
1810 struct bfd_strtab_hash *ret;
1812 ret = _bfd_stringtab_init ();
1817 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1818 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1819 if (loc == (bfd_size_type) -1)
1821 _bfd_stringtab_free (ret);
1828 /* ELF .o/exec file reading */
1830 /* Create a new bfd section from an ELF section header. */
1833 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1835 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1836 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1837 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1840 name = bfd_elf_string_from_elf_section (abfd,
1841 elf_elfheader (abfd)->e_shstrndx,
1846 switch (hdr->sh_type)
1849 /* Inactive section. Throw it away. */
1852 case SHT_PROGBITS: /* Normal section with contents. */
1853 case SHT_NOBITS: /* .bss section. */
1854 case SHT_HASH: /* .hash section. */
1855 case SHT_NOTE: /* .note section. */
1856 case SHT_INIT_ARRAY: /* .init_array section. */
1857 case SHT_FINI_ARRAY: /* .fini_array section. */
1858 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1859 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1860 case SHT_GNU_HASH: /* .gnu.hash section. */
1861 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1863 case SHT_DYNAMIC: /* Dynamic linking information. */
1864 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1866 if (hdr->sh_link > elf_numsections (abfd)
1867 || elf_elfsections (abfd)[hdr->sh_link] == NULL)
1869 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1871 Elf_Internal_Shdr *dynsymhdr;
1873 /* The shared libraries distributed with hpux11 have a bogus
1874 sh_link field for the ".dynamic" section. Find the
1875 string table for the ".dynsym" section instead. */
1876 if (elf_dynsymtab (abfd) != 0)
1878 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1879 hdr->sh_link = dynsymhdr->sh_link;
1883 unsigned int i, num_sec;
1885 num_sec = elf_numsections (abfd);
1886 for (i = 1; i < num_sec; i++)
1888 dynsymhdr = elf_elfsections (abfd)[i];
1889 if (dynsymhdr->sh_type == SHT_DYNSYM)
1891 hdr->sh_link = dynsymhdr->sh_link;
1899 case SHT_SYMTAB: /* A symbol table */
1900 if (elf_onesymtab (abfd) == shindex)
1903 if (hdr->sh_entsize != bed->s->sizeof_sym)
1905 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1906 elf_onesymtab (abfd) = shindex;
1907 elf_tdata (abfd)->symtab_hdr = *hdr;
1908 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1909 abfd->flags |= HAS_SYMS;
1911 /* Sometimes a shared object will map in the symbol table. If
1912 SHF_ALLOC is set, and this is a shared object, then we also
1913 treat this section as a BFD section. We can not base the
1914 decision purely on SHF_ALLOC, because that flag is sometimes
1915 set in a relocatable object file, which would confuse the
1917 if ((hdr->sh_flags & SHF_ALLOC) != 0
1918 && (abfd->flags & DYNAMIC) != 0
1919 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1923 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1924 can't read symbols without that section loaded as well. It
1925 is most likely specified by the next section header. */
1926 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1928 unsigned int i, num_sec;
1930 num_sec = elf_numsections (abfd);
1931 for (i = shindex + 1; i < num_sec; i++)
1933 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1934 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1935 && hdr2->sh_link == shindex)
1939 for (i = 1; i < shindex; i++)
1941 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1942 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1943 && hdr2->sh_link == shindex)
1947 return bfd_section_from_shdr (abfd, i);
1951 case SHT_DYNSYM: /* A dynamic symbol table */
1952 if (elf_dynsymtab (abfd) == shindex)
1955 if (hdr->sh_entsize != bed->s->sizeof_sym)
1957 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1958 elf_dynsymtab (abfd) = shindex;
1959 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1960 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1961 abfd->flags |= HAS_SYMS;
1963 /* Besides being a symbol table, we also treat this as a regular
1964 section, so that objcopy can handle it. */
1965 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1967 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1968 if (elf_symtab_shndx (abfd) == shindex)
1971 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1972 elf_symtab_shndx (abfd) = shindex;
1973 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1974 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1977 case SHT_STRTAB: /* A string table */
1978 if (hdr->bfd_section != NULL)
1980 if (ehdr->e_shstrndx == shindex)
1982 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1983 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1986 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1989 elf_tdata (abfd)->strtab_hdr = *hdr;
1990 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1993 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1996 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1997 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1998 elf_elfsections (abfd)[shindex] = hdr;
1999 /* We also treat this as a regular section, so that objcopy
2001 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2005 /* If the string table isn't one of the above, then treat it as a
2006 regular section. We need to scan all the headers to be sure,
2007 just in case this strtab section appeared before the above. */
2008 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
2010 unsigned int i, num_sec;
2012 num_sec = elf_numsections (abfd);
2013 for (i = 1; i < num_sec; i++)
2015 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2016 if (hdr2->sh_link == shindex)
2018 /* Prevent endless recursion on broken objects. */
2021 if (! bfd_section_from_shdr (abfd, i))
2023 if (elf_onesymtab (abfd) == i)
2025 if (elf_dynsymtab (abfd) == i)
2026 goto dynsymtab_strtab;
2030 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2034 /* *These* do a lot of work -- but build no sections! */
2036 asection *target_sect;
2037 Elf_Internal_Shdr *hdr2;
2038 unsigned int num_sec = elf_numsections (abfd);
2041 != (bfd_size_type) (hdr->sh_type == SHT_REL
2042 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
2045 /* Check for a bogus link to avoid crashing. */
2046 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
2047 || hdr->sh_link >= num_sec)
2049 ((*_bfd_error_handler)
2050 (_("%B: invalid link %lu for reloc section %s (index %u)"),
2051 abfd, hdr->sh_link, name, shindex));
2052 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2056 /* For some incomprehensible reason Oracle distributes
2057 libraries for Solaris in which some of the objects have
2058 bogus sh_link fields. It would be nice if we could just
2059 reject them, but, unfortunately, some people need to use
2060 them. We scan through the section headers; if we find only
2061 one suitable symbol table, we clobber the sh_link to point
2062 to it. I hope this doesn't break anything. */
2063 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
2064 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
2070 for (scan = 1; scan < num_sec; scan++)
2072 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
2073 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
2084 hdr->sh_link = found;
2087 /* Get the symbol table. */
2088 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
2089 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
2090 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
2093 /* If this reloc section does not use the main symbol table we
2094 don't treat it as a reloc section. BFD can't adequately
2095 represent such a section, so at least for now, we don't
2096 try. We just present it as a normal section. We also
2097 can't use it as a reloc section if it points to the null
2098 section, an invalid section, or another reloc section. */
2099 if (hdr->sh_link != elf_onesymtab (abfd)
2100 || hdr->sh_info == SHN_UNDEF
2101 || (hdr->sh_info >= SHN_LORESERVE && hdr->sh_info <= SHN_HIRESERVE)
2102 || hdr->sh_info >= num_sec
2103 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
2104 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
2105 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2108 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
2110 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
2111 if (target_sect == NULL)
2114 if ((target_sect->flags & SEC_RELOC) == 0
2115 || target_sect->reloc_count == 0)
2116 hdr2 = &elf_section_data (target_sect)->rel_hdr;
2120 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
2121 amt = sizeof (*hdr2);
2122 hdr2 = bfd_alloc (abfd, amt);
2123 elf_section_data (target_sect)->rel_hdr2 = hdr2;
2126 elf_elfsections (abfd)[shindex] = hdr2;
2127 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
2128 target_sect->flags |= SEC_RELOC;
2129 target_sect->relocation = NULL;
2130 target_sect->rel_filepos = hdr->sh_offset;
2131 /* In the section to which the relocations apply, mark whether
2132 its relocations are of the REL or RELA variety. */
2133 if (hdr->sh_size != 0)
2134 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
2135 abfd->flags |= HAS_RELOC;
2139 case SHT_GNU_verdef:
2140 elf_dynverdef (abfd) = shindex;
2141 elf_tdata (abfd)->dynverdef_hdr = *hdr;
2142 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2144 case SHT_GNU_versym:
2145 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
2147 elf_dynversym (abfd) = shindex;
2148 elf_tdata (abfd)->dynversym_hdr = *hdr;
2149 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2151 case SHT_GNU_verneed:
2152 elf_dynverref (abfd) = shindex;
2153 elf_tdata (abfd)->dynverref_hdr = *hdr;
2154 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2160 /* We need a BFD section for objcopy and relocatable linking,
2161 and it's handy to have the signature available as the section
2163 if (! IS_VALID_GROUP_SECTION_HEADER (hdr))
2165 name = group_signature (abfd, hdr);
2168 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2170 if (hdr->contents != NULL)
2172 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
2173 unsigned int n_elt = hdr->sh_size / GRP_ENTRY_SIZE;
2176 if (idx->flags & GRP_COMDAT)
2177 hdr->bfd_section->flags
2178 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
2180 /* We try to keep the same section order as it comes in. */
2182 while (--n_elt != 0)
2186 if (idx->shdr != NULL
2187 && (s = idx->shdr->bfd_section) != NULL
2188 && elf_next_in_group (s) != NULL)
2190 elf_next_in_group (hdr->bfd_section) = s;
2198 /* Check for any processor-specific section types. */
2199 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
2202 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
2204 if ((hdr->sh_flags & SHF_ALLOC) != 0)
2205 /* FIXME: How to properly handle allocated section reserved
2206 for applications? */
2207 (*_bfd_error_handler)
2208 (_("%B: don't know how to handle allocated, application "
2209 "specific section `%s' [0x%8x]"),
2210 abfd, name, hdr->sh_type);
2212 /* Allow sections reserved for applications. */
2213 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2216 else if (hdr->sh_type >= SHT_LOPROC
2217 && hdr->sh_type <= SHT_HIPROC)
2218 /* FIXME: We should handle this section. */
2219 (*_bfd_error_handler)
2220 (_("%B: don't know how to handle processor specific section "
2222 abfd, name, hdr->sh_type);
2223 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
2225 /* Unrecognised OS-specific sections. */
2226 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
2227 /* SHF_OS_NONCONFORMING indicates that special knowledge is
2228 required to correctly process the section and the file should
2229 be rejected with an error message. */
2230 (*_bfd_error_handler)
2231 (_("%B: don't know how to handle OS specific section "
2233 abfd, name, hdr->sh_type);
2235 /* Otherwise it should be processed. */
2236 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2239 /* FIXME: We should handle this section. */
2240 (*_bfd_error_handler)
2241 (_("%B: don't know how to handle section `%s' [0x%8x]"),
2242 abfd, name, hdr->sh_type);
2250 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2251 Return SEC for sections that have no elf section, and NULL on error. */
2254 bfd_section_from_r_symndx (bfd *abfd,
2255 struct sym_sec_cache *cache,
2257 unsigned long r_symndx)
2259 Elf_Internal_Shdr *symtab_hdr;
2260 unsigned char esym[sizeof (Elf64_External_Sym)];
2261 Elf_External_Sym_Shndx eshndx;
2262 Elf_Internal_Sym isym;
2263 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2265 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
2266 return cache->sec[ent];
2268 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2269 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2270 &isym, esym, &eshndx) == NULL)
2273 if (cache->abfd != abfd)
2275 memset (cache->indx, -1, sizeof (cache->indx));
2278 cache->indx[ent] = r_symndx;
2279 cache->sec[ent] = sec;
2280 if ((isym.st_shndx != SHN_UNDEF && isym.st_shndx < SHN_LORESERVE)
2281 || isym.st_shndx > SHN_HIRESERVE)
2284 s = bfd_section_from_elf_index (abfd, isym.st_shndx);
2286 cache->sec[ent] = s;
2288 return cache->sec[ent];
2291 /* Given an ELF section number, retrieve the corresponding BFD
2295 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
2297 if (index >= elf_numsections (abfd))
2299 return elf_elfsections (abfd)[index]->bfd_section;
2302 static const struct bfd_elf_special_section special_sections_b[] =
2304 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2305 { NULL, 0, 0, 0, 0 }
2308 static const struct bfd_elf_special_section special_sections_c[] =
2310 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
2311 { NULL, 0, 0, 0, 0 }
2314 static const struct bfd_elf_special_section special_sections_d[] =
2316 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2317 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2318 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
2319 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
2320 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
2321 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
2322 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
2323 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
2324 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
2325 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
2326 { NULL, 0, 0, 0, 0 }
2329 static const struct bfd_elf_special_section special_sections_f[] =
2331 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2332 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2333 { NULL, 0, 0, 0, 0 }
2336 static const struct bfd_elf_special_section special_sections_g[] =
2338 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2339 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2340 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2341 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2342 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2343 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2344 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2345 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2346 { NULL, 0, 0, 0, 0 }
2349 static const struct bfd_elf_special_section special_sections_h[] =
2351 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2352 { NULL, 0, 0, 0, 0 }
2355 static const struct bfd_elf_special_section special_sections_i[] =
2357 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2358 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2359 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2360 { NULL, 0, 0, 0, 0 }
2363 static const struct bfd_elf_special_section special_sections_l[] =
2365 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2366 { NULL, 0, 0, 0, 0 }
2369 static const struct bfd_elf_special_section special_sections_n[] =
2371 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2372 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2373 { NULL, 0, 0, 0, 0 }
2376 static const struct bfd_elf_special_section special_sections_p[] =
2378 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2379 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2380 { NULL, 0, 0, 0, 0 }
2383 static const struct bfd_elf_special_section special_sections_r[] =
2385 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2386 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2387 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2388 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2389 { NULL, 0, 0, 0, 0 }
2392 static const struct bfd_elf_special_section special_sections_s[] =
2394 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2395 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2396 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2397 /* See struct bfd_elf_special_section declaration for the semantics of
2398 this special case where .prefix_length != strlen (.prefix). */
2399 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2400 { NULL, 0, 0, 0, 0 }
2403 static const struct bfd_elf_special_section special_sections_t[] =
2405 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2406 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2407 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2408 { NULL, 0, 0, 0, 0 }
2411 static const struct bfd_elf_special_section *special_sections[] =
2413 special_sections_b, /* 'b' */
2414 special_sections_c, /* 'b' */
2415 special_sections_d, /* 'd' */
2417 special_sections_f, /* 'f' */
2418 special_sections_g, /* 'g' */
2419 special_sections_h, /* 'h' */
2420 special_sections_i, /* 'i' */
2423 special_sections_l, /* 'l' */
2425 special_sections_n, /* 'n' */
2427 special_sections_p, /* 'p' */
2429 special_sections_r, /* 'r' */
2430 special_sections_s, /* 's' */
2431 special_sections_t, /* 't' */
2434 const struct bfd_elf_special_section *
2435 _bfd_elf_get_special_section (const char *name,
2436 const struct bfd_elf_special_section *spec,
2442 len = strlen (name);
2444 for (i = 0; spec[i].prefix != NULL; i++)
2447 int prefix_len = spec[i].prefix_length;
2449 if (len < prefix_len)
2451 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2454 suffix_len = spec[i].suffix_length;
2455 if (suffix_len <= 0)
2457 if (name[prefix_len] != 0)
2459 if (suffix_len == 0)
2461 if (name[prefix_len] != '.'
2462 && (suffix_len == -2
2463 || (rela && spec[i].type == SHT_REL)))
2469 if (len < prefix_len + suffix_len)
2471 if (memcmp (name + len - suffix_len,
2472 spec[i].prefix + prefix_len,
2482 const struct bfd_elf_special_section *
2483 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2486 const struct bfd_elf_special_section *spec;
2487 const struct elf_backend_data *bed;
2489 /* See if this is one of the special sections. */
2490 if (sec->name == NULL)
2493 bed = get_elf_backend_data (abfd);
2494 spec = bed->special_sections;
2497 spec = _bfd_elf_get_special_section (sec->name,
2498 bed->special_sections,
2504 if (sec->name[0] != '.')
2507 i = sec->name[1] - 'b';
2508 if (i < 0 || i > 't' - 'b')
2511 spec = special_sections[i];
2516 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2520 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2522 struct bfd_elf_section_data *sdata;
2523 const struct elf_backend_data *bed;
2524 const struct bfd_elf_special_section *ssect;
2526 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2529 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2532 sec->used_by_bfd = sdata;
2535 /* Indicate whether or not this section should use RELA relocations. */
2536 bed = get_elf_backend_data (abfd);
2537 sec->use_rela_p = bed->default_use_rela_p;
2539 /* When we read a file, we don't need to set ELF section type and
2540 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2541 anyway. We will set ELF section type and flags for all linker
2542 created sections. If user specifies BFD section flags, we will
2543 set ELF section type and flags based on BFD section flags in
2544 elf_fake_sections. */
2545 if ((!sec->flags && abfd->direction != read_direction)
2546 || (sec->flags & SEC_LINKER_CREATED) != 0)
2548 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2551 elf_section_type (sec) = ssect->type;
2552 elf_section_flags (sec) = ssect->attr;
2556 return _bfd_generic_new_section_hook (abfd, sec);
2559 /* Create a new bfd section from an ELF program header.
2561 Since program segments have no names, we generate a synthetic name
2562 of the form segment<NUM>, where NUM is generally the index in the
2563 program header table. For segments that are split (see below) we
2564 generate the names segment<NUM>a and segment<NUM>b.
2566 Note that some program segments may have a file size that is different than
2567 (less than) the memory size. All this means is that at execution the
2568 system must allocate the amount of memory specified by the memory size,
2569 but only initialize it with the first "file size" bytes read from the
2570 file. This would occur for example, with program segments consisting
2571 of combined data+bss.
2573 To handle the above situation, this routine generates TWO bfd sections
2574 for the single program segment. The first has the length specified by
2575 the file size of the segment, and the second has the length specified
2576 by the difference between the two sizes. In effect, the segment is split
2577 into it's initialized and uninitialized parts.
2582 _bfd_elf_make_section_from_phdr (bfd *abfd,
2583 Elf_Internal_Phdr *hdr,
2585 const char *typename)
2593 split = ((hdr->p_memsz > 0)
2594 && (hdr->p_filesz > 0)
2595 && (hdr->p_memsz > hdr->p_filesz));
2596 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2597 len = strlen (namebuf) + 1;
2598 name = bfd_alloc (abfd, len);
2601 memcpy (name, namebuf, len);
2602 newsect = bfd_make_section (abfd, name);
2603 if (newsect == NULL)
2605 newsect->vma = hdr->p_vaddr;
2606 newsect->lma = hdr->p_paddr;
2607 newsect->size = hdr->p_filesz;
2608 newsect->filepos = hdr->p_offset;
2609 newsect->flags |= SEC_HAS_CONTENTS;
2610 newsect->alignment_power = bfd_log2 (hdr->p_align);
2611 if (hdr->p_type == PT_LOAD)
2613 newsect->flags |= SEC_ALLOC;
2614 newsect->flags |= SEC_LOAD;
2615 if (hdr->p_flags & PF_X)
2617 /* FIXME: all we known is that it has execute PERMISSION,
2619 newsect->flags |= SEC_CODE;
2622 if (!(hdr->p_flags & PF_W))
2624 newsect->flags |= SEC_READONLY;
2629 sprintf (namebuf, "%s%db", typename, index);
2630 len = strlen (namebuf) + 1;
2631 name = bfd_alloc (abfd, len);
2634 memcpy (name, namebuf, len);
2635 newsect = bfd_make_section (abfd, name);
2636 if (newsect == NULL)
2638 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2639 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2640 newsect->size = hdr->p_memsz - hdr->p_filesz;
2641 if (hdr->p_type == PT_LOAD)
2643 newsect->flags |= SEC_ALLOC;
2644 if (hdr->p_flags & PF_X)
2645 newsect->flags |= SEC_CODE;
2647 if (!(hdr->p_flags & PF_W))
2648 newsect->flags |= SEC_READONLY;
2655 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2657 const struct elf_backend_data *bed;
2659 switch (hdr->p_type)
2662 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2665 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2668 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2671 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2674 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2676 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2681 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2684 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2686 case PT_GNU_EH_FRAME:
2687 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2691 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2694 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
2697 /* Check for any processor-specific program segment types. */
2698 bed = get_elf_backend_data (abfd);
2699 return bed->elf_backend_section_from_phdr (abfd, hdr, index, "proc");
2703 /* Initialize REL_HDR, the section-header for new section, containing
2704 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2705 relocations; otherwise, we use REL relocations. */
2708 _bfd_elf_init_reloc_shdr (bfd *abfd,
2709 Elf_Internal_Shdr *rel_hdr,
2711 bfd_boolean use_rela_p)
2714 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2715 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2717 name = bfd_alloc (abfd, amt);
2720 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2722 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2724 if (rel_hdr->sh_name == (unsigned int) -1)
2726 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2727 rel_hdr->sh_entsize = (use_rela_p
2728 ? bed->s->sizeof_rela
2729 : bed->s->sizeof_rel);
2730 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2731 rel_hdr->sh_flags = 0;
2732 rel_hdr->sh_addr = 0;
2733 rel_hdr->sh_size = 0;
2734 rel_hdr->sh_offset = 0;
2739 /* Set up an ELF internal section header for a section. */
2742 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2744 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2745 bfd_boolean *failedptr = failedptrarg;
2746 Elf_Internal_Shdr *this_hdr;
2747 unsigned int sh_type;
2751 /* We already failed; just get out of the bfd_map_over_sections
2756 this_hdr = &elf_section_data (asect)->this_hdr;
2758 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2759 asect->name, FALSE);
2760 if (this_hdr->sh_name == (unsigned int) -1)
2766 /* Don't clear sh_flags. Assembler may set additional bits. */
2768 if ((asect->flags & SEC_ALLOC) != 0
2769 || asect->user_set_vma)
2770 this_hdr->sh_addr = asect->vma;
2772 this_hdr->sh_addr = 0;
2774 this_hdr->sh_offset = 0;
2775 this_hdr->sh_size = asect->size;
2776 this_hdr->sh_link = 0;
2777 this_hdr->sh_addralign = 1 << asect->alignment_power;
2778 /* The sh_entsize and sh_info fields may have been set already by
2779 copy_private_section_data. */
2781 this_hdr->bfd_section = asect;
2782 this_hdr->contents = NULL;
2784 /* If the section type is unspecified, we set it based on
2786 if (this_hdr->sh_type == SHT_NULL)
2788 if ((asect->flags & SEC_GROUP) != 0)
2789 this_hdr->sh_type = SHT_GROUP;
2790 else if ((asect->flags & SEC_ALLOC) != 0
2791 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2792 || (asect->flags & SEC_NEVER_LOAD) != 0))
2793 this_hdr->sh_type = SHT_NOBITS;
2795 this_hdr->sh_type = SHT_PROGBITS;
2798 switch (this_hdr->sh_type)
2804 case SHT_INIT_ARRAY:
2805 case SHT_FINI_ARRAY:
2806 case SHT_PREINIT_ARRAY:
2813 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2817 this_hdr->sh_entsize = bed->s->sizeof_sym;
2821 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2825 if (get_elf_backend_data (abfd)->may_use_rela_p)
2826 this_hdr->sh_entsize = bed->s->sizeof_rela;
2830 if (get_elf_backend_data (abfd)->may_use_rel_p)
2831 this_hdr->sh_entsize = bed->s->sizeof_rel;
2834 case SHT_GNU_versym:
2835 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2838 case SHT_GNU_verdef:
2839 this_hdr->sh_entsize = 0;
2840 /* objcopy or strip will copy over sh_info, but may not set
2841 cverdefs. The linker will set cverdefs, but sh_info will be
2843 if (this_hdr->sh_info == 0)
2844 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2846 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2847 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2850 case SHT_GNU_verneed:
2851 this_hdr->sh_entsize = 0;
2852 /* objcopy or strip will copy over sh_info, but may not set
2853 cverrefs. The linker will set cverrefs, but sh_info will be
2855 if (this_hdr->sh_info == 0)
2856 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2858 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2859 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2863 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
2867 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
2871 if ((asect->flags & SEC_ALLOC) != 0)
2872 this_hdr->sh_flags |= SHF_ALLOC;
2873 if ((asect->flags & SEC_READONLY) == 0)
2874 this_hdr->sh_flags |= SHF_WRITE;
2875 if ((asect->flags & SEC_CODE) != 0)
2876 this_hdr->sh_flags |= SHF_EXECINSTR;
2877 if ((asect->flags & SEC_MERGE) != 0)
2879 this_hdr->sh_flags |= SHF_MERGE;
2880 this_hdr->sh_entsize = asect->entsize;
2881 if ((asect->flags & SEC_STRINGS) != 0)
2882 this_hdr->sh_flags |= SHF_STRINGS;
2884 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2885 this_hdr->sh_flags |= SHF_GROUP;
2886 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2888 this_hdr->sh_flags |= SHF_TLS;
2889 if (asect->size == 0
2890 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2892 struct bfd_link_order *o = asect->map_tail.link_order;
2894 this_hdr->sh_size = 0;
2897 this_hdr->sh_size = o->offset + o->size;
2898 if (this_hdr->sh_size != 0)
2899 this_hdr->sh_type = SHT_NOBITS;
2904 /* Check for processor-specific section types. */
2905 sh_type = this_hdr->sh_type;
2906 if (bed->elf_backend_fake_sections
2907 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2910 if (sh_type == SHT_NOBITS && asect->size != 0)
2912 /* Don't change the header type from NOBITS if we are being
2913 called for objcopy --only-keep-debug. */
2914 this_hdr->sh_type = sh_type;
2917 /* If the section has relocs, set up a section header for the
2918 SHT_REL[A] section. If two relocation sections are required for
2919 this section, it is up to the processor-specific back-end to
2920 create the other. */
2921 if ((asect->flags & SEC_RELOC) != 0
2922 && !_bfd_elf_init_reloc_shdr (abfd,
2923 &elf_section_data (asect)->rel_hdr,
2929 /* Fill in the contents of a SHT_GROUP section. */
2932 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2934 bfd_boolean *failedptr = failedptrarg;
2935 unsigned long symindx;
2936 asection *elt, *first;
2940 /* Ignore linker created group section. See elfNN_ia64_object_p in
2942 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2947 if (elf_group_id (sec) != NULL)
2948 symindx = elf_group_id (sec)->udata.i;
2952 /* If called from the assembler, swap_out_syms will have set up
2953 elf_section_syms; If called for "ld -r", use target_index. */
2954 if (elf_section_syms (abfd) != NULL)
2955 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2957 symindx = sec->target_index;
2959 elf_section_data (sec)->this_hdr.sh_info = symindx;
2961 /* The contents won't be allocated for "ld -r" or objcopy. */
2963 if (sec->contents == NULL)
2966 sec->contents = bfd_alloc (abfd, sec->size);
2968 /* Arrange for the section to be written out. */
2969 elf_section_data (sec)->this_hdr.contents = sec->contents;
2970 if (sec->contents == NULL)
2977 loc = sec->contents + sec->size;
2979 /* Get the pointer to the first section in the group that gas
2980 squirreled away here. objcopy arranges for this to be set to the
2981 start of the input section group. */
2982 first = elt = elf_next_in_group (sec);
2984 /* First element is a flag word. Rest of section is elf section
2985 indices for all the sections of the group. Write them backwards
2986 just to keep the group in the same order as given in .section
2987 directives, not that it matters. */
2996 s = s->output_section;
2999 idx = elf_section_data (s)->this_idx;
3000 H_PUT_32 (abfd, idx, loc);
3001 elt = elf_next_in_group (elt);
3006 if ((loc -= 4) != sec->contents)
3009 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
3012 /* Assign all ELF section numbers. The dummy first section is handled here
3013 too. The link/info pointers for the standard section types are filled
3014 in here too, while we're at it. */
3017 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
3019 struct elf_obj_tdata *t = elf_tdata (abfd);
3021 unsigned int section_number, secn;
3022 Elf_Internal_Shdr **i_shdrp;
3023 struct bfd_elf_section_data *d;
3027 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
3029 /* SHT_GROUP sections are in relocatable files only. */
3030 if (link_info == NULL || link_info->relocatable)
3032 /* Put SHT_GROUP sections first. */
3033 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3035 d = elf_section_data (sec);
3037 if (d->this_hdr.sh_type == SHT_GROUP)
3039 if (sec->flags & SEC_LINKER_CREATED)
3041 /* Remove the linker created SHT_GROUP sections. */
3042 bfd_section_list_remove (abfd, sec);
3043 abfd->section_count--;
3047 if (section_number == SHN_LORESERVE)
3048 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3049 d->this_idx = section_number++;
3055 for (sec = abfd->sections; sec; sec = sec->next)
3057 d = elf_section_data (sec);
3059 if (d->this_hdr.sh_type != SHT_GROUP)
3061 if (section_number == SHN_LORESERVE)
3062 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3063 d->this_idx = section_number++;
3065 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
3066 if ((sec->flags & SEC_RELOC) == 0)
3070 if (section_number == SHN_LORESERVE)
3071 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3072 d->rel_idx = section_number++;
3073 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
3078 if (section_number == SHN_LORESERVE)
3079 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3080 d->rel_idx2 = section_number++;
3081 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
3087 if (section_number == SHN_LORESERVE)
3088 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3089 t->shstrtab_section = section_number++;
3090 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
3091 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
3093 if (bfd_get_symcount (abfd) > 0)
3095 if (section_number == SHN_LORESERVE)
3096 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3097 t->symtab_section = section_number++;
3098 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
3099 if (section_number > SHN_LORESERVE - 2)
3101 if (section_number == SHN_LORESERVE)
3102 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3103 t->symtab_shndx_section = section_number++;
3104 t->symtab_shndx_hdr.sh_name
3105 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3106 ".symtab_shndx", FALSE);
3107 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
3110 if (section_number == SHN_LORESERVE)
3111 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3112 t->strtab_section = section_number++;
3113 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
3116 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
3117 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3119 elf_numsections (abfd) = section_number;
3120 elf_elfheader (abfd)->e_shnum = section_number;
3121 if (section_number > SHN_LORESERVE)
3122 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
3124 /* Set up the list of section header pointers, in agreement with the
3126 i_shdrp = bfd_zalloc2 (abfd, section_number, sizeof (Elf_Internal_Shdr *));
3127 if (i_shdrp == NULL)
3130 i_shdrp[0] = bfd_zalloc (abfd, sizeof (Elf_Internal_Shdr));
3131 if (i_shdrp[0] == NULL)
3133 bfd_release (abfd, i_shdrp);
3137 elf_elfsections (abfd) = i_shdrp;
3139 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
3140 if (bfd_get_symcount (abfd) > 0)
3142 i_shdrp[t->symtab_section] = &t->symtab_hdr;
3143 if (elf_numsections (abfd) > SHN_LORESERVE)
3145 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
3146 t->symtab_shndx_hdr.sh_link = t->symtab_section;
3148 i_shdrp[t->strtab_section] = &t->strtab_hdr;
3149 t->symtab_hdr.sh_link = t->strtab_section;
3152 for (sec = abfd->sections; sec; sec = sec->next)
3154 struct bfd_elf_section_data *d = elf_section_data (sec);
3158 i_shdrp[d->this_idx] = &d->this_hdr;
3159 if (d->rel_idx != 0)
3160 i_shdrp[d->rel_idx] = &d->rel_hdr;
3161 if (d->rel_idx2 != 0)
3162 i_shdrp[d->rel_idx2] = d->rel_hdr2;
3164 /* Fill in the sh_link and sh_info fields while we're at it. */
3166 /* sh_link of a reloc section is the section index of the symbol
3167 table. sh_info is the section index of the section to which
3168 the relocation entries apply. */
3169 if (d->rel_idx != 0)
3171 d->rel_hdr.sh_link = t->symtab_section;
3172 d->rel_hdr.sh_info = d->this_idx;
3174 if (d->rel_idx2 != 0)
3176 d->rel_hdr2->sh_link = t->symtab_section;
3177 d->rel_hdr2->sh_info = d->this_idx;
3180 /* We need to set up sh_link for SHF_LINK_ORDER. */
3181 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3183 s = elf_linked_to_section (sec);
3186 /* elf_linked_to_section points to the input section. */
3187 if (link_info != NULL)
3189 /* Check discarded linkonce section. */
3190 if (elf_discarded_section (s))
3193 (*_bfd_error_handler)
3194 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3195 abfd, d->this_hdr.bfd_section,
3197 /* Point to the kept section if it has the same
3198 size as the discarded one. */
3199 kept = _bfd_elf_check_kept_section (s, link_info);
3202 bfd_set_error (bfd_error_bad_value);
3208 s = s->output_section;
3209 BFD_ASSERT (s != NULL);
3213 /* Handle objcopy. */
3214 if (s->output_section == NULL)
3216 (*_bfd_error_handler)
3217 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
3218 abfd, d->this_hdr.bfd_section, s, s->owner);
3219 bfd_set_error (bfd_error_bad_value);
3222 s = s->output_section;
3224 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3229 The Intel C compiler generates SHT_IA_64_UNWIND with
3230 SHF_LINK_ORDER. But it doesn't set the sh_link or
3231 sh_info fields. Hence we could get the situation
3233 const struct elf_backend_data *bed
3234 = get_elf_backend_data (abfd);
3235 if (bed->link_order_error_handler)
3236 bed->link_order_error_handler
3237 (_("%B: warning: sh_link not set for section `%A'"),
3242 switch (d->this_hdr.sh_type)
3246 /* A reloc section which we are treating as a normal BFD
3247 section. sh_link is the section index of the symbol
3248 table. sh_info is the section index of the section to
3249 which the relocation entries apply. We assume that an
3250 allocated reloc section uses the dynamic symbol table.
3251 FIXME: How can we be sure? */
3252 s = bfd_get_section_by_name (abfd, ".dynsym");
3254 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3256 /* We look up the section the relocs apply to by name. */
3258 if (d->this_hdr.sh_type == SHT_REL)
3262 s = bfd_get_section_by_name (abfd, name);
3264 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3268 /* We assume that a section named .stab*str is a stabs
3269 string section. We look for a section with the same name
3270 but without the trailing ``str'', and set its sh_link
3271 field to point to this section. */
3272 if (CONST_STRNEQ (sec->name, ".stab")
3273 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3278 len = strlen (sec->name);
3279 alc = bfd_malloc (len - 2);
3282 memcpy (alc, sec->name, len - 3);
3283 alc[len - 3] = '\0';
3284 s = bfd_get_section_by_name (abfd, alc);
3288 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3290 /* This is a .stab section. */
3291 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3292 elf_section_data (s)->this_hdr.sh_entsize
3293 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3300 case SHT_GNU_verneed:
3301 case SHT_GNU_verdef:
3302 /* sh_link is the section header index of the string table
3303 used for the dynamic entries, or the symbol table, or the
3305 s = bfd_get_section_by_name (abfd, ".dynstr");
3307 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3310 case SHT_GNU_LIBLIST:
3311 /* sh_link is the section header index of the prelink library
3313 used for the dynamic entries, or the symbol table, or the
3315 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3316 ? ".dynstr" : ".gnu.libstr");
3318 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3323 case SHT_GNU_versym:
3324 /* sh_link is the section header index of the symbol table
3325 this hash table or version table is for. */
3326 s = bfd_get_section_by_name (abfd, ".dynsym");
3328 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3332 d->this_hdr.sh_link = t->symtab_section;
3336 for (secn = 1; secn < section_number; ++secn)
3337 if (i_shdrp[secn] == NULL)
3338 i_shdrp[secn] = i_shdrp[0];
3340 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3341 i_shdrp[secn]->sh_name);
3345 /* Map symbol from it's internal number to the external number, moving
3346 all local symbols to be at the head of the list. */
3349 sym_is_global (bfd *abfd, asymbol *sym)
3351 /* If the backend has a special mapping, use it. */
3352 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3353 if (bed->elf_backend_sym_is_global)
3354 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3356 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3357 || bfd_is_und_section (bfd_get_section (sym))
3358 || bfd_is_com_section (bfd_get_section (sym)));
3361 /* Don't output section symbols for sections that are not going to be
3362 output. Also, don't output section symbols for reloc and other
3363 special sections. */
3366 ignore_section_sym (bfd *abfd, asymbol *sym)
3368 return ((sym->flags & BSF_SECTION_SYM) != 0
3370 || (sym->section->owner != abfd
3371 && (sym->section->output_section->owner != abfd
3372 || sym->section->output_offset != 0))));
3376 elf_map_symbols (bfd *abfd)
3378 unsigned int symcount = bfd_get_symcount (abfd);
3379 asymbol **syms = bfd_get_outsymbols (abfd);
3380 asymbol **sect_syms;
3381 unsigned int num_locals = 0;
3382 unsigned int num_globals = 0;
3383 unsigned int num_locals2 = 0;
3384 unsigned int num_globals2 = 0;
3391 fprintf (stderr, "elf_map_symbols\n");
3395 for (asect = abfd->sections; asect; asect = asect->next)
3397 if (max_index < asect->index)
3398 max_index = asect->index;
3402 sect_syms = bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3403 if (sect_syms == NULL)
3405 elf_section_syms (abfd) = sect_syms;
3406 elf_num_section_syms (abfd) = max_index;
3408 /* Init sect_syms entries for any section symbols we have already
3409 decided to output. */
3410 for (idx = 0; idx < symcount; idx++)
3412 asymbol *sym = syms[idx];
3414 if ((sym->flags & BSF_SECTION_SYM) != 0
3415 && !ignore_section_sym (abfd, sym))
3417 asection *sec = sym->section;
3419 if (sec->owner != abfd)
3420 sec = sec->output_section;
3422 sect_syms[sec->index] = syms[idx];
3426 /* Classify all of the symbols. */
3427 for (idx = 0; idx < symcount; idx++)
3429 if (ignore_section_sym (abfd, syms[idx]))
3431 if (!sym_is_global (abfd, syms[idx]))
3437 /* We will be adding a section symbol for each normal BFD section. Most
3438 sections will already have a section symbol in outsymbols, but
3439 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3440 at least in that case. */
3441 for (asect = abfd->sections; asect; asect = asect->next)
3443 if (sect_syms[asect->index] == NULL)
3445 if (!sym_is_global (abfd, asect->symbol))
3452 /* Now sort the symbols so the local symbols are first. */
3453 new_syms = bfd_alloc2 (abfd, num_locals + num_globals, sizeof (asymbol *));
3455 if (new_syms == NULL)
3458 for (idx = 0; idx < symcount; idx++)
3460 asymbol *sym = syms[idx];
3463 if (ignore_section_sym (abfd, sym))
3465 if (!sym_is_global (abfd, sym))
3468 i = num_locals + num_globals2++;
3470 sym->udata.i = i + 1;
3472 for (asect = abfd->sections; asect; asect = asect->next)
3474 if (sect_syms[asect->index] == NULL)
3476 asymbol *sym = asect->symbol;
3479 sect_syms[asect->index] = sym;
3480 if (!sym_is_global (abfd, sym))
3483 i = num_locals + num_globals2++;
3485 sym->udata.i = i + 1;
3489 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3491 elf_num_locals (abfd) = num_locals;
3492 elf_num_globals (abfd) = num_globals;
3496 /* Align to the maximum file alignment that could be required for any
3497 ELF data structure. */
3499 static inline file_ptr
3500 align_file_position (file_ptr off, int align)
3502 return (off + align - 1) & ~(align - 1);
3505 /* Assign a file position to a section, optionally aligning to the
3506 required section alignment. */
3509 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3517 al = i_shdrp->sh_addralign;
3519 offset = BFD_ALIGN (offset, al);
3521 i_shdrp->sh_offset = offset;
3522 if (i_shdrp->bfd_section != NULL)
3523 i_shdrp->bfd_section->filepos = offset;
3524 if (i_shdrp->sh_type != SHT_NOBITS)
3525 offset += i_shdrp->sh_size;
3529 /* Compute the file positions we are going to put the sections at, and
3530 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3531 is not NULL, this is being called by the ELF backend linker. */
3534 _bfd_elf_compute_section_file_positions (bfd *abfd,
3535 struct bfd_link_info *link_info)
3537 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3539 struct bfd_strtab_hash *strtab = NULL;
3540 Elf_Internal_Shdr *shstrtab_hdr;
3542 if (abfd->output_has_begun)
3545 /* Do any elf backend specific processing first. */
3546 if (bed->elf_backend_begin_write_processing)
3547 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3549 if (! prep_headers (abfd))
3552 /* Post process the headers if necessary. */
3553 if (bed->elf_backend_post_process_headers)
3554 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3557 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3561 if (!assign_section_numbers (abfd, link_info))
3564 /* The backend linker builds symbol table information itself. */
3565 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3567 /* Non-zero if doing a relocatable link. */
3568 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3570 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3574 if (link_info == NULL)
3576 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3581 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3582 /* sh_name was set in prep_headers. */
3583 shstrtab_hdr->sh_type = SHT_STRTAB;
3584 shstrtab_hdr->sh_flags = 0;
3585 shstrtab_hdr->sh_addr = 0;
3586 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3587 shstrtab_hdr->sh_entsize = 0;
3588 shstrtab_hdr->sh_link = 0;
3589 shstrtab_hdr->sh_info = 0;
3590 /* sh_offset is set in assign_file_positions_except_relocs. */
3591 shstrtab_hdr->sh_addralign = 1;
3593 if (!assign_file_positions_except_relocs (abfd, link_info))
3596 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3599 Elf_Internal_Shdr *hdr;
3601 off = elf_tdata (abfd)->next_file_pos;
3603 hdr = &elf_tdata (abfd)->symtab_hdr;
3604 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3606 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3607 if (hdr->sh_size != 0)
3608 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3610 hdr = &elf_tdata (abfd)->strtab_hdr;
3611 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3613 elf_tdata (abfd)->next_file_pos = off;
3615 /* Now that we know where the .strtab section goes, write it
3617 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3618 || ! _bfd_stringtab_emit (abfd, strtab))
3620 _bfd_stringtab_free (strtab);
3623 abfd->output_has_begun = TRUE;
3628 /* Make an initial estimate of the size of the program header. If we
3629 get the number wrong here, we'll redo section placement. */
3631 static bfd_size_type
3632 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3636 const struct elf_backend_data *bed;
3638 /* Assume we will need exactly two PT_LOAD segments: one for text
3639 and one for data. */
3642 s = bfd_get_section_by_name (abfd, ".interp");
3643 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3645 /* If we have a loadable interpreter section, we need a
3646 PT_INTERP segment. In this case, assume we also need a
3647 PT_PHDR segment, although that may not be true for all
3652 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3654 /* We need a PT_DYNAMIC segment. */
3657 if (elf_tdata (abfd)->relro)
3659 /* We need a PT_GNU_RELRO segment only when there is a
3660 PT_DYNAMIC segment. */
3665 if (elf_tdata (abfd)->eh_frame_hdr)
3667 /* We need a PT_GNU_EH_FRAME segment. */
3671 if (elf_tdata (abfd)->stack_flags)
3673 /* We need a PT_GNU_STACK segment. */
3677 for (s = abfd->sections; s != NULL; s = s->next)
3679 if ((s->flags & SEC_LOAD) != 0
3680 && CONST_STRNEQ (s->name, ".note"))
3682 /* We need a PT_NOTE segment. */
3687 for (s = abfd->sections; s != NULL; s = s->next)
3689 if (s->flags & SEC_THREAD_LOCAL)
3691 /* We need a PT_TLS segment. */
3697 /* Let the backend count up any program headers it might need. */
3698 bed = get_elf_backend_data (abfd);
3699 if (bed->elf_backend_additional_program_headers)
3703 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3709 return segs * bed->s->sizeof_phdr;
3712 /* Create a mapping from a set of sections to a program segment. */
3714 static struct elf_segment_map *
3715 make_mapping (bfd *abfd,
3716 asection **sections,
3721 struct elf_segment_map *m;
3726 amt = sizeof (struct elf_segment_map);
3727 amt += (to - from - 1) * sizeof (asection *);
3728 m = bfd_zalloc (abfd, amt);
3732 m->p_type = PT_LOAD;
3733 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3734 m->sections[i - from] = *hdrpp;
3735 m->count = to - from;
3737 if (from == 0 && phdr)
3739 /* Include the headers in the first PT_LOAD segment. */
3740 m->includes_filehdr = 1;
3741 m->includes_phdrs = 1;
3747 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3750 struct elf_segment_map *
3751 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3753 struct elf_segment_map *m;
3755 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3759 m->p_type = PT_DYNAMIC;
3761 m->sections[0] = dynsec;
3766 /* Possibly add or remove segments from the segment map. */
3769 elf_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
3771 struct elf_segment_map **m;
3772 const struct elf_backend_data *bed;
3774 /* The placement algorithm assumes that non allocated sections are
3775 not in PT_LOAD segments. We ensure this here by removing such
3776 sections from the segment map. We also remove excluded
3777 sections. Finally, any PT_LOAD segment without sections is
3779 m = &elf_tdata (abfd)->segment_map;
3782 unsigned int i, new_count;
3784 for (new_count = 0, i = 0; i < (*m)->count; i++)
3786 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3787 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3788 || (*m)->p_type != PT_LOAD))
3790 (*m)->sections[new_count] = (*m)->sections[i];
3794 (*m)->count = new_count;
3796 if ((*m)->p_type == PT_LOAD && (*m)->count == 0)
3802 bed = get_elf_backend_data (abfd);
3803 if (bed->elf_backend_modify_segment_map != NULL)
3805 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3812 /* Set up a mapping from BFD sections to program segments. */
3815 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3818 struct elf_segment_map *m;
3819 asection **sections = NULL;
3820 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3822 if (elf_tdata (abfd)->segment_map == NULL
3823 && bfd_count_sections (abfd) != 0)
3827 struct elf_segment_map *mfirst;
3828 struct elf_segment_map **pm;
3831 unsigned int phdr_index;
3832 bfd_vma maxpagesize;
3834 bfd_boolean phdr_in_segment = TRUE;
3835 bfd_boolean writable;
3837 asection *first_tls = NULL;
3838 asection *dynsec, *eh_frame_hdr;
3841 /* Select the allocated sections, and sort them. */
3843 sections = bfd_malloc2 (bfd_count_sections (abfd), sizeof (asection *));
3844 if (sections == NULL)
3848 for (s = abfd->sections; s != NULL; s = s->next)
3850 if ((s->flags & SEC_ALLOC) != 0)
3856 BFD_ASSERT (i <= bfd_count_sections (abfd));
3859 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3861 /* Build the mapping. */
3866 /* If we have a .interp section, then create a PT_PHDR segment for
3867 the program headers and a PT_INTERP segment for the .interp
3869 s = bfd_get_section_by_name (abfd, ".interp");
3870 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3872 amt = sizeof (struct elf_segment_map);
3873 m = bfd_zalloc (abfd, amt);
3877 m->p_type = PT_PHDR;
3878 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3879 m->p_flags = PF_R | PF_X;
3880 m->p_flags_valid = 1;
3881 m->includes_phdrs = 1;
3886 amt = sizeof (struct elf_segment_map);
3887 m = bfd_zalloc (abfd, amt);
3891 m->p_type = PT_INTERP;
3899 /* Look through the sections. We put sections in the same program
3900 segment when the start of the second section can be placed within
3901 a few bytes of the end of the first section. */
3905 maxpagesize = bed->maxpagesize;
3907 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3909 && (dynsec->flags & SEC_LOAD) == 0)
3912 /* Deal with -Ttext or something similar such that the first section
3913 is not adjacent to the program headers. This is an
3914 approximation, since at this point we don't know exactly how many
3915 program headers we will need. */
3918 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
3920 if (phdr_size == (bfd_size_type) -1)
3921 phdr_size = get_program_header_size (abfd, info);
3922 if ((abfd->flags & D_PAGED) == 0
3923 || sections[0]->lma < phdr_size
3924 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3925 phdr_in_segment = FALSE;
3928 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3931 bfd_boolean new_segment;
3935 /* See if this section and the last one will fit in the same
3938 if (last_hdr == NULL)
3940 /* If we don't have a segment yet, then we don't need a new
3941 one (we build the last one after this loop). */
3942 new_segment = FALSE;
3944 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3946 /* If this section has a different relation between the
3947 virtual address and the load address, then we need a new
3951 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3952 < BFD_ALIGN (hdr->lma, maxpagesize))
3954 /* If putting this section in this segment would force us to
3955 skip a page in the segment, then we need a new segment. */
3958 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3959 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3961 /* We don't want to put a loadable section after a
3962 nonloadable section in the same segment.
3963 Consider .tbss sections as loadable for this purpose. */
3966 else if ((abfd->flags & D_PAGED) == 0)
3968 /* If the file is not demand paged, which means that we
3969 don't require the sections to be correctly aligned in the
3970 file, then there is no other reason for a new segment. */
3971 new_segment = FALSE;
3974 && (hdr->flags & SEC_READONLY) == 0
3975 && (((last_hdr->lma + last_size - 1)
3976 & ~(maxpagesize - 1))
3977 != (hdr->lma & ~(maxpagesize - 1))))
3979 /* We don't want to put a writable section in a read only
3980 segment, unless they are on the same page in memory
3981 anyhow. We already know that the last section does not
3982 bring us past the current section on the page, so the
3983 only case in which the new section is not on the same
3984 page as the previous section is when the previous section
3985 ends precisely on a page boundary. */
3990 /* Otherwise, we can use the same segment. */
3991 new_segment = FALSE;
3994 /* Allow interested parties a chance to override our decision. */
3995 if (last_hdr && info->callbacks->override_segment_assignment)
3996 new_segment = info->callbacks->override_segment_assignment (info, abfd, hdr, last_hdr, new_segment);
4000 if ((hdr->flags & SEC_READONLY) == 0)
4003 /* .tbss sections effectively have zero size. */
4004 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4005 != SEC_THREAD_LOCAL)
4006 last_size = hdr->size;
4012 /* We need a new program segment. We must create a new program
4013 header holding all the sections from phdr_index until hdr. */
4015 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4022 if ((hdr->flags & SEC_READONLY) == 0)
4028 /* .tbss sections effectively have zero size. */
4029 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
4030 last_size = hdr->size;
4034 phdr_in_segment = FALSE;
4037 /* Create a final PT_LOAD program segment. */
4038 if (last_hdr != NULL)
4040 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4048 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
4051 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
4058 /* For each loadable .note section, add a PT_NOTE segment. We don't
4059 use bfd_get_section_by_name, because if we link together
4060 nonloadable .note sections and loadable .note sections, we will
4061 generate two .note sections in the output file. FIXME: Using
4062 names for section types is bogus anyhow. */
4063 for (s = abfd->sections; s != NULL; s = s->next)
4065 if ((s->flags & SEC_LOAD) != 0
4066 && CONST_STRNEQ (s->name, ".note"))
4068 amt = sizeof (struct elf_segment_map);
4069 m = bfd_zalloc (abfd, amt);
4073 m->p_type = PT_NOTE;
4080 if (s->flags & SEC_THREAD_LOCAL)
4088 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
4093 amt = sizeof (struct elf_segment_map);
4094 amt += (tls_count - 1) * sizeof (asection *);
4095 m = bfd_zalloc (abfd, amt);
4100 m->count = tls_count;
4101 /* Mandated PF_R. */
4103 m->p_flags_valid = 1;
4104 for (i = 0; i < tls_count; ++i)
4106 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
4107 m->sections[i] = first_tls;
4108 first_tls = first_tls->next;
4115 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
4117 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
4118 if (eh_frame_hdr != NULL
4119 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
4121 amt = sizeof (struct elf_segment_map);
4122 m = bfd_zalloc (abfd, amt);
4126 m->p_type = PT_GNU_EH_FRAME;
4128 m->sections[0] = eh_frame_hdr->output_section;
4134 if (elf_tdata (abfd)->stack_flags)
4136 amt = sizeof (struct elf_segment_map);
4137 m = bfd_zalloc (abfd, amt);
4141 m->p_type = PT_GNU_STACK;
4142 m->p_flags = elf_tdata (abfd)->stack_flags;
4143 m->p_flags_valid = 1;
4149 if (dynsec != NULL && elf_tdata (abfd)->relro)
4151 /* We make a PT_GNU_RELRO segment only when there is a
4152 PT_DYNAMIC segment. */
4153 amt = sizeof (struct elf_segment_map);
4154 m = bfd_zalloc (abfd, amt);
4158 m->p_type = PT_GNU_RELRO;
4160 m->p_flags_valid = 1;
4167 elf_tdata (abfd)->segment_map = mfirst;
4170 if (!elf_modify_segment_map (abfd, info))
4173 for (count = 0, m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4175 elf_tdata (abfd)->program_header_size = count * bed->s->sizeof_phdr;
4180 if (sections != NULL)
4185 /* Sort sections by address. */
4188 elf_sort_sections (const void *arg1, const void *arg2)
4190 const asection *sec1 = *(const asection **) arg1;
4191 const asection *sec2 = *(const asection **) arg2;
4192 bfd_size_type size1, size2;
4194 /* Sort by LMA first, since this is the address used to
4195 place the section into a segment. */
4196 if (sec1->lma < sec2->lma)
4198 else if (sec1->lma > sec2->lma)
4201 /* Then sort by VMA. Normally the LMA and the VMA will be
4202 the same, and this will do nothing. */
4203 if (sec1->vma < sec2->vma)
4205 else if (sec1->vma > sec2->vma)
4208 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
4210 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
4216 /* If the indicies are the same, do not return 0
4217 here, but continue to try the next comparison. */
4218 if (sec1->target_index - sec2->target_index != 0)
4219 return sec1->target_index - sec2->target_index;
4224 else if (TOEND (sec2))
4229 /* Sort by size, to put zero sized sections
4230 before others at the same address. */
4232 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
4233 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
4240 return sec1->target_index - sec2->target_index;
4243 /* Ian Lance Taylor writes:
4245 We shouldn't be using % with a negative signed number. That's just
4246 not good. We have to make sure either that the number is not
4247 negative, or that the number has an unsigned type. When the types
4248 are all the same size they wind up as unsigned. When file_ptr is a
4249 larger signed type, the arithmetic winds up as signed long long,
4252 What we're trying to say here is something like ``increase OFF by
4253 the least amount that will cause it to be equal to the VMA modulo
4255 /* In other words, something like:
4257 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4258 off_offset = off % bed->maxpagesize;
4259 if (vma_offset < off_offset)
4260 adjustment = vma_offset + bed->maxpagesize - off_offset;
4262 adjustment = vma_offset - off_offset;
4264 which can can be collapsed into the expression below. */
4267 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4269 return ((vma - off) % maxpagesize);
4272 /* Assign file positions to the sections based on the mapping from
4273 sections to segments. This function also sets up some fields in
4277 assign_file_positions_for_load_sections (bfd *abfd,
4278 struct bfd_link_info *link_info)
4280 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4281 struct elf_segment_map *m;
4282 Elf_Internal_Phdr *phdrs;
4283 Elf_Internal_Phdr *p;
4285 bfd_size_type maxpagesize;
4289 if (link_info == NULL
4290 && !elf_modify_segment_map (abfd, link_info))
4294 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4297 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4298 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4299 elf_elfheader (abfd)->e_phnum = alloc;
4301 if (elf_tdata (abfd)->program_header_size == (bfd_size_type) -1)
4302 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4304 BFD_ASSERT (elf_tdata (abfd)->program_header_size
4305 >= alloc * bed->s->sizeof_phdr);
4309 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4313 phdrs = bfd_alloc2 (abfd, alloc, sizeof (Elf_Internal_Phdr));
4314 elf_tdata (abfd)->phdr = phdrs;
4319 if ((abfd->flags & D_PAGED) != 0)
4320 maxpagesize = bed->maxpagesize;
4322 off = bed->s->sizeof_ehdr;
4323 off += alloc * bed->s->sizeof_phdr;
4325 for (m = elf_tdata (abfd)->segment_map, p = phdrs, j = 0;
4327 m = m->next, p++, j++)
4331 bfd_boolean no_contents;
4333 /* If elf_segment_map is not from map_sections_to_segments, the
4334 sections may not be correctly ordered. NOTE: sorting should
4335 not be done to the PT_NOTE section of a corefile, which may
4336 contain several pseudo-sections artificially created by bfd.
4337 Sorting these pseudo-sections breaks things badly. */
4339 && !(elf_elfheader (abfd)->e_type == ET_CORE
4340 && m->p_type == PT_NOTE))
4341 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4344 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4345 number of sections with contents contributing to both p_filesz
4346 and p_memsz, followed by a number of sections with no contents
4347 that just contribute to p_memsz. In this loop, OFF tracks next
4348 available file offset for PT_LOAD and PT_NOTE segments. */
4349 p->p_type = m->p_type;
4350 p->p_flags = m->p_flags;
4355 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4357 if (m->p_paddr_valid)
4358 p->p_paddr = m->p_paddr;
4359 else if (m->count == 0)
4362 p->p_paddr = m->sections[0]->lma;
4364 if (p->p_type == PT_LOAD
4365 && (abfd->flags & D_PAGED) != 0)
4367 /* p_align in demand paged PT_LOAD segments effectively stores
4368 the maximum page size. When copying an executable with
4369 objcopy, we set m->p_align from the input file. Use this
4370 value for maxpagesize rather than bed->maxpagesize, which
4371 may be different. Note that we use maxpagesize for PT_TLS
4372 segment alignment later in this function, so we are relying
4373 on at least one PT_LOAD segment appearing before a PT_TLS
4375 if (m->p_align_valid)
4376 maxpagesize = m->p_align;
4378 p->p_align = maxpagesize;
4380 else if (m->count == 0)
4381 p->p_align = 1 << bed->s->log_file_align;
4382 else if (m->p_align_valid)
4383 p->p_align = m->p_align;
4387 no_contents = FALSE;
4389 if (p->p_type == PT_LOAD
4392 bfd_size_type align;
4393 unsigned int align_power = 0;
4395 if (m->p_align_valid)
4399 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4401 unsigned int secalign;
4403 secalign = bfd_get_section_alignment (abfd, *secpp);
4404 if (secalign > align_power)
4405 align_power = secalign;
4407 align = (bfd_size_type) 1 << align_power;
4408 if (align < maxpagesize)
4409 align = maxpagesize;
4412 for (i = 0; i < m->count; i++)
4413 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4414 /* If we aren't making room for this section, then
4415 it must be SHT_NOBITS regardless of what we've
4416 set via struct bfd_elf_special_section. */
4417 elf_section_type (m->sections[i]) = SHT_NOBITS;
4419 /* Find out whether this segment contains any loadable
4420 sections. If the first section isn't loadable, the same
4421 holds for any other sections. */
4423 while (elf_section_type (m->sections[i]) == SHT_NOBITS)
4425 /* If a segment starts with .tbss, we need to look
4426 at the next section to decide whether the segment
4427 has any loadable sections. */
4428 if ((elf_section_flags (m->sections[i]) & SHF_TLS) == 0
4436 off_adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4440 /* We shouldn't need to align the segment on disk since
4441 the segment doesn't need file space, but the gABI
4442 arguably requires the alignment and glibc ld.so
4443 checks it. So to comply with the alignment
4444 requirement but not waste file space, we adjust
4445 p_offset for just this segment. (OFF_ADJUST is
4446 subtracted from OFF later.) This may put p_offset
4447 past the end of file, but that shouldn't matter. */
4452 /* Make sure the .dynamic section is the first section in the
4453 PT_DYNAMIC segment. */
4454 else if (p->p_type == PT_DYNAMIC
4456 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4459 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4461 bfd_set_error (bfd_error_bad_value);
4469 if (m->includes_filehdr)
4471 if (!m->p_flags_valid)
4473 p->p_filesz = bed->s->sizeof_ehdr;
4474 p->p_memsz = bed->s->sizeof_ehdr;
4477 BFD_ASSERT (p->p_type == PT_LOAD);
4479 if (p->p_vaddr < (bfd_vma) off)
4481 (*_bfd_error_handler)
4482 (_("%B: Not enough room for program headers, try linking with -N"),
4484 bfd_set_error (bfd_error_bad_value);
4489 if (!m->p_paddr_valid)
4494 if (m->includes_phdrs)
4496 if (!m->p_flags_valid)
4499 if (!m->includes_filehdr)
4501 p->p_offset = bed->s->sizeof_ehdr;
4505 BFD_ASSERT (p->p_type == PT_LOAD);
4506 p->p_vaddr -= off - p->p_offset;
4507 if (!m->p_paddr_valid)
4508 p->p_paddr -= off - p->p_offset;
4512 p->p_filesz += alloc * bed->s->sizeof_phdr;
4513 p->p_memsz += alloc * bed->s->sizeof_phdr;
4516 if (p->p_type == PT_LOAD
4517 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4519 if (!m->includes_filehdr && !m->includes_phdrs)
4525 adjust = off - (p->p_offset + p->p_filesz);
4527 p->p_filesz += adjust;
4528 p->p_memsz += adjust;
4532 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4533 maps. Set filepos for sections in PT_LOAD segments, and in
4534 core files, for sections in PT_NOTE segments.
4535 assign_file_positions_for_non_load_sections will set filepos
4536 for other sections and update p_filesz for other segments. */
4537 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4540 bfd_size_type align;
4541 Elf_Internal_Shdr *this_hdr;
4544 this_hdr = &elf_section_data (sec)->this_hdr;
4545 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4547 if (p->p_type == PT_LOAD
4548 || p->p_type == PT_TLS)
4550 bfd_signed_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
4552 if (this_hdr->sh_type != SHT_NOBITS
4553 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4554 && ((this_hdr->sh_flags & SHF_TLS) == 0
4555 || p->p_type == PT_TLS)))
4559 (*_bfd_error_handler)
4560 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4561 abfd, sec, (unsigned long) sec->lma);
4564 p->p_memsz += adjust;
4566 if (this_hdr->sh_type != SHT_NOBITS)
4569 p->p_filesz += adjust;
4574 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4576 /* The section at i == 0 is the one that actually contains
4580 this_hdr->sh_offset = sec->filepos = off;
4581 off += this_hdr->sh_size;
4582 p->p_filesz = this_hdr->sh_size;
4588 /* The rest are fake sections that shouldn't be written. */
4597 if (p->p_type == PT_LOAD)
4599 this_hdr->sh_offset = sec->filepos = off;
4600 if (this_hdr->sh_type != SHT_NOBITS)
4601 off += this_hdr->sh_size;
4604 if (this_hdr->sh_type != SHT_NOBITS)
4606 p->p_filesz += this_hdr->sh_size;
4607 /* A load section without SHF_ALLOC is something like
4608 a note section in a PT_NOTE segment. These take
4609 file space but are not loaded into memory. */
4610 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4611 p->p_memsz += this_hdr->sh_size;
4613 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4615 if (p->p_type == PT_TLS)
4616 p->p_memsz += this_hdr->sh_size;
4618 /* .tbss is special. It doesn't contribute to p_memsz of
4620 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
4621 p->p_memsz += this_hdr->sh_size;
4624 if (p->p_type == PT_GNU_RELRO)
4626 else if (align > p->p_align
4627 && !m->p_align_valid
4628 && (p->p_type != PT_LOAD
4629 || (abfd->flags & D_PAGED) == 0))
4633 if (!m->p_flags_valid)
4636 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4638 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4644 /* Check that all sections are in a PT_LOAD segment.
4645 Don't check funky gdb generated core files. */
4646 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4647 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4649 Elf_Internal_Shdr *this_hdr;
4653 this_hdr = &(elf_section_data(sec)->this_hdr);
4654 if (this_hdr->sh_size != 0
4655 && !ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, p))
4657 (*_bfd_error_handler)
4658 (_("%B: section `%A' can't be allocated in segment %d"),
4660 bfd_set_error (bfd_error_bad_value);
4666 elf_tdata (abfd)->next_file_pos = off;
4670 /* Assign file positions for the other sections. */
4673 assign_file_positions_for_non_load_sections (bfd *abfd,
4674 struct bfd_link_info *link_info)
4676 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4677 Elf_Internal_Shdr **i_shdrpp;
4678 Elf_Internal_Shdr **hdrpp;
4679 Elf_Internal_Phdr *phdrs;
4680 Elf_Internal_Phdr *p;
4681 struct elf_segment_map *m;
4682 bfd_vma filehdr_vaddr, filehdr_paddr;
4683 bfd_vma phdrs_vaddr, phdrs_paddr;
4685 unsigned int num_sec;
4689 i_shdrpp = elf_elfsections (abfd);
4690 num_sec = elf_numsections (abfd);
4691 off = elf_tdata (abfd)->next_file_pos;
4692 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4694 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4695 Elf_Internal_Shdr *hdr;
4698 if (hdr->bfd_section != NULL
4699 && (hdr->bfd_section->filepos != 0
4700 || (hdr->sh_type == SHT_NOBITS
4701 && hdr->contents == NULL)))
4702 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
4703 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4705 if (hdr->sh_size != 0)
4706 ((*_bfd_error_handler)
4707 (_("%B: warning: allocated section `%s' not in segment"),
4709 (hdr->bfd_section == NULL
4711 : hdr->bfd_section->name)));
4712 /* We don't need to page align empty sections. */
4713 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
4714 off += vma_page_aligned_bias (hdr->sh_addr, off,
4717 off += vma_page_aligned_bias (hdr->sh_addr, off,
4719 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4722 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4723 && hdr->bfd_section == NULL)
4724 || hdr == i_shdrpp[tdata->symtab_section]
4725 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4726 || hdr == i_shdrpp[tdata->strtab_section])
4727 hdr->sh_offset = -1;
4729 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4731 if (i == SHN_LORESERVE - 1)
4733 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4734 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4738 /* Now that we have set the section file positions, we can set up
4739 the file positions for the non PT_LOAD segments. */
4743 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4745 phdrs = elf_tdata (abfd)->phdr;
4746 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4751 if (p->p_type != PT_LOAD)
4754 if (m->includes_filehdr)
4756 filehdr_vaddr = p->p_vaddr;
4757 filehdr_paddr = p->p_paddr;
4759 if (m->includes_phdrs)
4761 phdrs_vaddr = p->p_vaddr;
4762 phdrs_paddr = p->p_paddr;
4763 if (m->includes_filehdr)
4765 phdrs_vaddr += bed->s->sizeof_ehdr;
4766 phdrs_paddr += bed->s->sizeof_ehdr;
4771 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4777 if (p->p_type != PT_LOAD
4778 && (p->p_type != PT_NOTE || bfd_get_format (abfd) != bfd_core))
4780 Elf_Internal_Shdr *hdr;
4781 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4783 hdr = &elf_section_data (m->sections[m->count - 1])->this_hdr;
4784 p->p_filesz = (m->sections[m->count - 1]->filepos
4785 - m->sections[0]->filepos);
4786 if (hdr->sh_type != SHT_NOBITS)
4787 p->p_filesz += hdr->sh_size;
4789 p->p_offset = m->sections[0]->filepos;
4794 if (m->includes_filehdr)
4796 p->p_vaddr = filehdr_vaddr;
4797 if (! m->p_paddr_valid)
4798 p->p_paddr = filehdr_paddr;
4800 else if (m->includes_phdrs)
4802 p->p_vaddr = phdrs_vaddr;
4803 if (! m->p_paddr_valid)
4804 p->p_paddr = phdrs_paddr;
4806 else if (p->p_type == PT_GNU_RELRO)
4808 Elf_Internal_Phdr *lp;
4810 for (lp = phdrs; lp < phdrs + count; ++lp)
4812 if (lp->p_type == PT_LOAD
4813 && lp->p_vaddr <= link_info->relro_end
4814 && lp->p_vaddr >= link_info->relro_start
4815 && (lp->p_vaddr + lp->p_filesz
4816 >= link_info->relro_end))
4820 if (lp < phdrs + count
4821 && link_info->relro_end > lp->p_vaddr)
4823 p->p_vaddr = lp->p_vaddr;
4824 p->p_paddr = lp->p_paddr;
4825 p->p_offset = lp->p_offset;
4826 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4827 p->p_memsz = p->p_filesz;
4829 p->p_flags = (lp->p_flags & ~PF_W);
4833 memset (p, 0, sizeof *p);
4834 p->p_type = PT_NULL;
4840 elf_tdata (abfd)->next_file_pos = off;
4845 /* Work out the file positions of all the sections. This is called by
4846 _bfd_elf_compute_section_file_positions. All the section sizes and
4847 VMAs must be known before this is called.
4849 Reloc sections come in two flavours: Those processed specially as
4850 "side-channel" data attached to a section to which they apply, and
4851 those that bfd doesn't process as relocations. The latter sort are
4852 stored in a normal bfd section by bfd_section_from_shdr. We don't
4853 consider the former sort here, unless they form part of the loadable
4854 image. Reloc sections not assigned here will be handled later by
4855 assign_file_positions_for_relocs.
4857 We also don't set the positions of the .symtab and .strtab here. */
4860 assign_file_positions_except_relocs (bfd *abfd,
4861 struct bfd_link_info *link_info)
4863 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4864 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4866 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4868 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4869 && bfd_get_format (abfd) != bfd_core)
4871 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4872 unsigned int num_sec = elf_numsections (abfd);
4873 Elf_Internal_Shdr **hdrpp;
4876 /* Start after the ELF header. */
4877 off = i_ehdrp->e_ehsize;
4879 /* We are not creating an executable, which means that we are
4880 not creating a program header, and that the actual order of
4881 the sections in the file is unimportant. */
4882 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4884 Elf_Internal_Shdr *hdr;
4887 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4888 && hdr->bfd_section == NULL)
4889 || i == tdata->symtab_section
4890 || i == tdata->symtab_shndx_section
4891 || i == tdata->strtab_section)
4893 hdr->sh_offset = -1;
4896 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4898 if (i == SHN_LORESERVE - 1)
4900 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4901 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4909 /* Assign file positions for the loaded sections based on the
4910 assignment of sections to segments. */
4911 if (!assign_file_positions_for_load_sections (abfd, link_info))
4914 /* And for non-load sections. */
4915 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
4918 if (bed->elf_backend_modify_program_headers != NULL)
4920 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
4924 /* Write out the program headers. */
4925 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
4926 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4927 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
4930 off = tdata->next_file_pos;
4933 /* Place the section headers. */
4934 off = align_file_position (off, 1 << bed->s->log_file_align);
4935 i_ehdrp->e_shoff = off;
4936 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4938 tdata->next_file_pos = off;
4944 prep_headers (bfd *abfd)
4946 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4947 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4948 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4949 struct elf_strtab_hash *shstrtab;
4950 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4952 i_ehdrp = elf_elfheader (abfd);
4953 i_shdrp = elf_elfsections (abfd);
4955 shstrtab = _bfd_elf_strtab_init ();
4956 if (shstrtab == NULL)
4959 elf_shstrtab (abfd) = shstrtab;
4961 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4962 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4963 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4964 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4966 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4967 i_ehdrp->e_ident[EI_DATA] =
4968 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4969 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4971 if ((abfd->flags & DYNAMIC) != 0)
4972 i_ehdrp->e_type = ET_DYN;
4973 else if ((abfd->flags & EXEC_P) != 0)
4974 i_ehdrp->e_type = ET_EXEC;
4975 else if (bfd_get_format (abfd) == bfd_core)
4976 i_ehdrp->e_type = ET_CORE;
4978 i_ehdrp->e_type = ET_REL;
4980 switch (bfd_get_arch (abfd))
4982 case bfd_arch_unknown:
4983 i_ehdrp->e_machine = EM_NONE;
4986 /* There used to be a long list of cases here, each one setting
4987 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4988 in the corresponding bfd definition. To avoid duplication,
4989 the switch was removed. Machines that need special handling
4990 can generally do it in elf_backend_final_write_processing(),
4991 unless they need the information earlier than the final write.
4992 Such need can generally be supplied by replacing the tests for
4993 e_machine with the conditions used to determine it. */
4995 i_ehdrp->e_machine = bed->elf_machine_code;
4998 i_ehdrp->e_version = bed->s->ev_current;
4999 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
5001 /* No program header, for now. */
5002 i_ehdrp->e_phoff = 0;
5003 i_ehdrp->e_phentsize = 0;
5004 i_ehdrp->e_phnum = 0;
5006 /* Each bfd section is section header entry. */
5007 i_ehdrp->e_entry = bfd_get_start_address (abfd);
5008 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
5010 /* If we're building an executable, we'll need a program header table. */
5011 if (abfd->flags & EXEC_P)
5012 /* It all happens later. */
5016 i_ehdrp->e_phentsize = 0;
5018 i_ehdrp->e_phoff = 0;
5021 elf_tdata (abfd)->symtab_hdr.sh_name =
5022 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
5023 elf_tdata (abfd)->strtab_hdr.sh_name =
5024 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
5025 elf_tdata (abfd)->shstrtab_hdr.sh_name =
5026 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
5027 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
5028 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
5029 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
5035 /* Assign file positions for all the reloc sections which are not part
5036 of the loadable file image. */
5039 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
5042 unsigned int i, num_sec;
5043 Elf_Internal_Shdr **shdrpp;
5045 off = elf_tdata (abfd)->next_file_pos;
5047 num_sec = elf_numsections (abfd);
5048 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
5050 Elf_Internal_Shdr *shdrp;
5053 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
5054 && shdrp->sh_offset == -1)
5055 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
5058 elf_tdata (abfd)->next_file_pos = off;
5062 _bfd_elf_write_object_contents (bfd *abfd)
5064 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5065 Elf_Internal_Ehdr *i_ehdrp;
5066 Elf_Internal_Shdr **i_shdrp;
5068 unsigned int count, num_sec;
5070 if (! abfd->output_has_begun
5071 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
5074 i_shdrp = elf_elfsections (abfd);
5075 i_ehdrp = elf_elfheader (abfd);
5078 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
5082 _bfd_elf_assign_file_positions_for_relocs (abfd);
5084 /* After writing the headers, we need to write the sections too... */
5085 num_sec = elf_numsections (abfd);
5086 for (count = 1; count < num_sec; count++)
5088 if (bed->elf_backend_section_processing)
5089 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
5090 if (i_shdrp[count]->contents)
5092 bfd_size_type amt = i_shdrp[count]->sh_size;
5094 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
5095 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
5098 if (count == SHN_LORESERVE - 1)
5099 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
5102 /* Write out the section header names. */
5103 if (elf_shstrtab (abfd) != NULL
5104 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
5105 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
5108 if (bed->elf_backend_final_write_processing)
5109 (*bed->elf_backend_final_write_processing) (abfd,
5110 elf_tdata (abfd)->linker);
5112 return bed->s->write_shdrs_and_ehdr (abfd);
5116 _bfd_elf_write_corefile_contents (bfd *abfd)
5118 /* Hopefully this can be done just like an object file. */
5119 return _bfd_elf_write_object_contents (abfd);
5122 /* Given a section, search the header to find them. */
5125 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
5127 const struct elf_backend_data *bed;
5130 if (elf_section_data (asect) != NULL
5131 && elf_section_data (asect)->this_idx != 0)
5132 return elf_section_data (asect)->this_idx;
5134 if (bfd_is_abs_section (asect))
5136 else if (bfd_is_com_section (asect))
5138 else if (bfd_is_und_section (asect))
5143 bed = get_elf_backend_data (abfd);
5144 if (bed->elf_backend_section_from_bfd_section)
5148 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
5153 bfd_set_error (bfd_error_nonrepresentable_section);
5158 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5162 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5164 asymbol *asym_ptr = *asym_ptr_ptr;
5166 flagword flags = asym_ptr->flags;
5168 /* When gas creates relocations against local labels, it creates its
5169 own symbol for the section, but does put the symbol into the
5170 symbol chain, so udata is 0. When the linker is generating
5171 relocatable output, this section symbol may be for one of the
5172 input sections rather than the output section. */
5173 if (asym_ptr->udata.i == 0
5174 && (flags & BSF_SECTION_SYM)
5175 && asym_ptr->section)
5180 sec = asym_ptr->section;
5181 if (sec->owner != abfd && sec->output_section != NULL)
5182 sec = sec->output_section;
5183 if (sec->owner == abfd
5184 && (indx = sec->index) < elf_num_section_syms (abfd)
5185 && elf_section_syms (abfd)[indx] != NULL)
5186 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5189 idx = asym_ptr->udata.i;
5193 /* This case can occur when using --strip-symbol on a symbol
5194 which is used in a relocation entry. */
5195 (*_bfd_error_handler)
5196 (_("%B: symbol `%s' required but not present"),
5197 abfd, bfd_asymbol_name (asym_ptr));
5198 bfd_set_error (bfd_error_no_symbols);
5205 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5206 (long) asym_ptr, asym_ptr->name, idx, flags,
5207 elf_symbol_flags (flags));
5215 /* Rewrite program header information. */
5218 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
5220 Elf_Internal_Ehdr *iehdr;
5221 struct elf_segment_map *map;
5222 struct elf_segment_map *map_first;
5223 struct elf_segment_map **pointer_to_map;
5224 Elf_Internal_Phdr *segment;
5227 unsigned int num_segments;
5228 bfd_boolean phdr_included = FALSE;
5229 bfd_vma maxpagesize;
5230 struct elf_segment_map *phdr_adjust_seg = NULL;
5231 unsigned int phdr_adjust_num = 0;
5232 const struct elf_backend_data *bed;
5234 bed = get_elf_backend_data (ibfd);
5235 iehdr = elf_elfheader (ibfd);
5238 pointer_to_map = &map_first;
5240 num_segments = elf_elfheader (ibfd)->e_phnum;
5241 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5243 /* Returns the end address of the segment + 1. */
5244 #define SEGMENT_END(segment, start) \
5245 (start + (segment->p_memsz > segment->p_filesz \
5246 ? segment->p_memsz : segment->p_filesz))
5248 #define SECTION_SIZE(section, segment) \
5249 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5250 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5251 ? section->size : 0)
5253 /* Returns TRUE if the given section is contained within
5254 the given segment. VMA addresses are compared. */
5255 #define IS_CONTAINED_BY_VMA(section, segment) \
5256 (section->vma >= segment->p_vaddr \
5257 && (section->vma + SECTION_SIZE (section, segment) \
5258 <= (SEGMENT_END (segment, segment->p_vaddr))))
5260 /* Returns TRUE if the given section is contained within
5261 the given segment. LMA addresses are compared. */
5262 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5263 (section->lma >= base \
5264 && (section->lma + SECTION_SIZE (section, segment) \
5265 <= SEGMENT_END (segment, base)))
5267 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5268 #define IS_COREFILE_NOTE(p, s) \
5269 (p->p_type == PT_NOTE \
5270 && bfd_get_format (ibfd) == bfd_core \
5271 && s->vma == 0 && s->lma == 0 \
5272 && (bfd_vma) s->filepos >= p->p_offset \
5273 && ((bfd_vma) s->filepos + s->size \
5274 <= p->p_offset + p->p_filesz))
5276 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5277 linker, which generates a PT_INTERP section with p_vaddr and
5278 p_memsz set to 0. */
5279 #define IS_SOLARIS_PT_INTERP(p, s) \
5281 && p->p_paddr == 0 \
5282 && p->p_memsz == 0 \
5283 && p->p_filesz > 0 \
5284 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5286 && (bfd_vma) s->filepos >= p->p_offset \
5287 && ((bfd_vma) s->filepos + s->size \
5288 <= p->p_offset + p->p_filesz))
5290 /* Decide if the given section should be included in the given segment.
5291 A section will be included if:
5292 1. It is within the address space of the segment -- we use the LMA
5293 if that is set for the segment and the VMA otherwise,
5294 2. It is an allocated segment,
5295 3. There is an output section associated with it,
5296 4. The section has not already been allocated to a previous segment.
5297 5. PT_GNU_STACK segments do not include any sections.
5298 6. PT_TLS segment includes only SHF_TLS sections.
5299 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5300 8. PT_DYNAMIC should not contain empty sections at the beginning
5301 (with the possible exception of .dynamic). */
5302 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5303 ((((segment->p_paddr \
5304 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5305 : IS_CONTAINED_BY_VMA (section, segment)) \
5306 && (section->flags & SEC_ALLOC) != 0) \
5307 || IS_COREFILE_NOTE (segment, section)) \
5308 && segment->p_type != PT_GNU_STACK \
5309 && (segment->p_type != PT_TLS \
5310 || (section->flags & SEC_THREAD_LOCAL)) \
5311 && (segment->p_type == PT_LOAD \
5312 || segment->p_type == PT_TLS \
5313 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5314 && (segment->p_type != PT_DYNAMIC \
5315 || SECTION_SIZE (section, segment) > 0 \
5316 || (segment->p_paddr \
5317 ? segment->p_paddr != section->lma \
5318 : segment->p_vaddr != section->vma) \
5319 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5321 && ! section->segment_mark)
5323 /* If the output section of a section in the input segment is NULL,
5324 it is removed from the corresponding output segment. */
5325 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5326 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5327 && section->output_section != NULL)
5329 /* Returns TRUE iff seg1 starts after the end of seg2. */
5330 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5331 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5333 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5334 their VMA address ranges and their LMA address ranges overlap.
5335 It is possible to have overlapping VMA ranges without overlapping LMA
5336 ranges. RedBoot images for example can have both .data and .bss mapped
5337 to the same VMA range, but with the .data section mapped to a different
5339 #define SEGMENT_OVERLAPS(seg1, seg2) \
5340 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5341 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5342 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5343 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5345 /* Initialise the segment mark field. */
5346 for (section = ibfd->sections; section != NULL; section = section->next)
5347 section->segment_mark = FALSE;
5349 /* Scan through the segments specified in the program header
5350 of the input BFD. For this first scan we look for overlaps
5351 in the loadable segments. These can be created by weird
5352 parameters to objcopy. Also, fix some solaris weirdness. */
5353 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5358 Elf_Internal_Phdr *segment2;
5360 if (segment->p_type == PT_INTERP)
5361 for (section = ibfd->sections; section; section = section->next)
5362 if (IS_SOLARIS_PT_INTERP (segment, section))
5364 /* Mininal change so that the normal section to segment
5365 assignment code will work. */
5366 segment->p_vaddr = section->vma;
5370 if (segment->p_type != PT_LOAD)
5373 /* Determine if this segment overlaps any previous segments. */
5374 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
5376 bfd_signed_vma extra_length;
5378 if (segment2->p_type != PT_LOAD
5379 || ! SEGMENT_OVERLAPS (segment, segment2))
5382 /* Merge the two segments together. */
5383 if (segment2->p_vaddr < segment->p_vaddr)
5385 /* Extend SEGMENT2 to include SEGMENT and then delete
5388 SEGMENT_END (segment, segment->p_vaddr)
5389 - SEGMENT_END (segment2, segment2->p_vaddr);
5391 if (extra_length > 0)
5393 segment2->p_memsz += extra_length;
5394 segment2->p_filesz += extra_length;
5397 segment->p_type = PT_NULL;
5399 /* Since we have deleted P we must restart the outer loop. */
5401 segment = elf_tdata (ibfd)->phdr;
5406 /* Extend SEGMENT to include SEGMENT2 and then delete
5409 SEGMENT_END (segment2, segment2->p_vaddr)
5410 - SEGMENT_END (segment, segment->p_vaddr);
5412 if (extra_length > 0)
5414 segment->p_memsz += extra_length;
5415 segment->p_filesz += extra_length;
5418 segment2->p_type = PT_NULL;
5423 /* The second scan attempts to assign sections to segments. */
5424 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5428 unsigned int section_count;
5429 asection ** sections;
5430 asection * output_section;
5432 bfd_vma matching_lma;
5433 bfd_vma suggested_lma;
5436 asection * first_section;
5438 if (segment->p_type == PT_NULL)
5441 first_section = NULL;
5442 /* Compute how many sections might be placed into this segment. */
5443 for (section = ibfd->sections, section_count = 0;
5445 section = section->next)
5447 /* Find the first section in the input segment, which may be
5448 removed from the corresponding output segment. */
5449 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5451 if (first_section == NULL)
5452 first_section = section;
5453 if (section->output_section != NULL)
5458 /* Allocate a segment map big enough to contain
5459 all of the sections we have selected. */
5460 amt = sizeof (struct elf_segment_map);
5461 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5462 map = bfd_zalloc (obfd, amt);
5466 /* Initialise the fields of the segment map. Default to
5467 using the physical address of the segment in the input BFD. */
5469 map->p_type = segment->p_type;
5470 map->p_flags = segment->p_flags;
5471 map->p_flags_valid = 1;
5473 /* If the first section in the input segment is removed, there is
5474 no need to preserve segment physical address in the corresponding
5476 if (!first_section || first_section->output_section != NULL)
5478 map->p_paddr = segment->p_paddr;
5479 map->p_paddr_valid = 1;
5482 /* Determine if this segment contains the ELF file header
5483 and if it contains the program headers themselves. */
5484 map->includes_filehdr = (segment->p_offset == 0
5485 && segment->p_filesz >= iehdr->e_ehsize);
5487 map->includes_phdrs = 0;
5489 if (! phdr_included || segment->p_type != PT_LOAD)
5491 map->includes_phdrs =
5492 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5493 && (segment->p_offset + segment->p_filesz
5494 >= ((bfd_vma) iehdr->e_phoff
5495 + iehdr->e_phnum * iehdr->e_phentsize)));
5497 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5498 phdr_included = TRUE;
5501 if (section_count == 0)
5503 /* Special segments, such as the PT_PHDR segment, may contain
5504 no sections, but ordinary, loadable segments should contain
5505 something. They are allowed by the ELF spec however, so only
5506 a warning is produced. */
5507 if (segment->p_type == PT_LOAD)
5508 (*_bfd_error_handler)
5509 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5513 *pointer_to_map = map;
5514 pointer_to_map = &map->next;
5519 /* Now scan the sections in the input BFD again and attempt
5520 to add their corresponding output sections to the segment map.
5521 The problem here is how to handle an output section which has
5522 been moved (ie had its LMA changed). There are four possibilities:
5524 1. None of the sections have been moved.
5525 In this case we can continue to use the segment LMA from the
5528 2. All of the sections have been moved by the same amount.
5529 In this case we can change the segment's LMA to match the LMA
5530 of the first section.
5532 3. Some of the sections have been moved, others have not.
5533 In this case those sections which have not been moved can be
5534 placed in the current segment which will have to have its size,
5535 and possibly its LMA changed, and a new segment or segments will
5536 have to be created to contain the other sections.
5538 4. The sections have been moved, but not by the same amount.
5539 In this case we can change the segment's LMA to match the LMA
5540 of the first section and we will have to create a new segment
5541 or segments to contain the other sections.
5543 In order to save time, we allocate an array to hold the section
5544 pointers that we are interested in. As these sections get assigned
5545 to a segment, they are removed from this array. */
5547 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5548 to work around this long long bug. */
5549 sections = bfd_malloc2 (section_count, sizeof (asection *));
5550 if (sections == NULL)
5553 /* Step One: Scan for segment vs section LMA conflicts.
5554 Also add the sections to the section array allocated above.
5555 Also add the sections to the current segment. In the common
5556 case, where the sections have not been moved, this means that
5557 we have completely filled the segment, and there is nothing
5563 for (j = 0, section = ibfd->sections;
5565 section = section->next)
5567 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5569 output_section = section->output_section;
5571 sections[j ++] = section;
5573 /* The Solaris native linker always sets p_paddr to 0.
5574 We try to catch that case here, and set it to the
5575 correct value. Note - some backends require that
5576 p_paddr be left as zero. */
5577 if (segment->p_paddr == 0
5578 && segment->p_vaddr != 0
5579 && (! bed->want_p_paddr_set_to_zero)
5581 && output_section->lma != 0
5582 && (output_section->vma == (segment->p_vaddr
5583 + (map->includes_filehdr
5586 + (map->includes_phdrs
5588 * iehdr->e_phentsize)
5590 map->p_paddr = segment->p_vaddr;
5592 /* Match up the physical address of the segment with the
5593 LMA address of the output section. */
5594 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5595 || IS_COREFILE_NOTE (segment, section)
5596 || (bed->want_p_paddr_set_to_zero &&
5597 IS_CONTAINED_BY_VMA (output_section, segment))
5600 if (matching_lma == 0)
5601 matching_lma = output_section->lma;
5603 /* We assume that if the section fits within the segment
5604 then it does not overlap any other section within that
5606 map->sections[isec ++] = output_section;
5608 else if (suggested_lma == 0)
5609 suggested_lma = output_section->lma;
5613 BFD_ASSERT (j == section_count);
5615 /* Step Two: Adjust the physical address of the current segment,
5617 if (isec == section_count)
5619 /* All of the sections fitted within the segment as currently
5620 specified. This is the default case. Add the segment to
5621 the list of built segments and carry on to process the next
5622 program header in the input BFD. */
5623 map->count = section_count;
5624 *pointer_to_map = map;
5625 pointer_to_map = &map->next;
5627 if (matching_lma != map->p_paddr
5628 && !map->includes_filehdr && !map->includes_phdrs)
5629 /* There is some padding before the first section in the
5630 segment. So, we must account for that in the output
5632 map->p_vaddr_offset = matching_lma - map->p_paddr;
5639 if (matching_lma != 0)
5641 /* At least one section fits inside the current segment.
5642 Keep it, but modify its physical address to match the
5643 LMA of the first section that fitted. */
5644 map->p_paddr = matching_lma;
5648 /* None of the sections fitted inside the current segment.
5649 Change the current segment's physical address to match
5650 the LMA of the first section. */
5651 map->p_paddr = suggested_lma;
5654 /* Offset the segment physical address from the lma
5655 to allow for space taken up by elf headers. */
5656 if (map->includes_filehdr)
5657 map->p_paddr -= iehdr->e_ehsize;
5659 if (map->includes_phdrs)
5661 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5663 /* iehdr->e_phnum is just an estimate of the number
5664 of program headers that we will need. Make a note
5665 here of the number we used and the segment we chose
5666 to hold these headers, so that we can adjust the
5667 offset when we know the correct value. */
5668 phdr_adjust_num = iehdr->e_phnum;
5669 phdr_adjust_seg = map;
5673 /* Step Three: Loop over the sections again, this time assigning
5674 those that fit to the current segment and removing them from the
5675 sections array; but making sure not to leave large gaps. Once all
5676 possible sections have been assigned to the current segment it is
5677 added to the list of built segments and if sections still remain
5678 to be assigned, a new segment is constructed before repeating
5686 /* Fill the current segment with sections that fit. */
5687 for (j = 0; j < section_count; j++)
5689 section = sections[j];
5691 if (section == NULL)
5694 output_section = section->output_section;
5696 BFD_ASSERT (output_section != NULL);
5698 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5699 || IS_COREFILE_NOTE (segment, section))
5701 if (map->count == 0)
5703 /* If the first section in a segment does not start at
5704 the beginning of the segment, then something is
5706 if (output_section->lma !=
5708 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5709 + (map->includes_phdrs
5710 ? iehdr->e_phnum * iehdr->e_phentsize
5716 asection * prev_sec;
5718 prev_sec = map->sections[map->count - 1];
5720 /* If the gap between the end of the previous section
5721 and the start of this section is more than
5722 maxpagesize then we need to start a new segment. */
5723 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5725 < BFD_ALIGN (output_section->lma, maxpagesize))
5726 || ((prev_sec->lma + prev_sec->size)
5727 > output_section->lma))
5729 if (suggested_lma == 0)
5730 suggested_lma = output_section->lma;
5736 map->sections[map->count++] = output_section;
5739 section->segment_mark = TRUE;
5741 else if (suggested_lma == 0)
5742 suggested_lma = output_section->lma;
5745 BFD_ASSERT (map->count > 0);
5747 /* Add the current segment to the list of built segments. */
5748 *pointer_to_map = map;
5749 pointer_to_map = &map->next;
5751 if (isec < section_count)
5753 /* We still have not allocated all of the sections to
5754 segments. Create a new segment here, initialise it
5755 and carry on looping. */
5756 amt = sizeof (struct elf_segment_map);
5757 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5758 map = bfd_alloc (obfd, amt);
5765 /* Initialise the fields of the segment map. Set the physical
5766 physical address to the LMA of the first section that has
5767 not yet been assigned. */
5769 map->p_type = segment->p_type;
5770 map->p_flags = segment->p_flags;
5771 map->p_flags_valid = 1;
5772 map->p_paddr = suggested_lma;
5773 map->p_paddr_valid = 1;
5774 map->includes_filehdr = 0;
5775 map->includes_phdrs = 0;
5778 while (isec < section_count);
5783 /* The Solaris linker creates program headers in which all the
5784 p_paddr fields are zero. When we try to objcopy or strip such a
5785 file, we get confused. Check for this case, and if we find it
5786 reset the p_paddr_valid fields. */
5787 for (map = map_first; map != NULL; map = map->next)
5788 if (map->p_paddr != 0)
5791 for (map = map_first; map != NULL; map = map->next)
5792 map->p_paddr_valid = 0;
5794 elf_tdata (obfd)->segment_map = map_first;
5796 /* If we had to estimate the number of program headers that were
5797 going to be needed, then check our estimate now and adjust
5798 the offset if necessary. */
5799 if (phdr_adjust_seg != NULL)
5803 for (count = 0, map = map_first; map != NULL; map = map->next)
5806 if (count > phdr_adjust_num)
5807 phdr_adjust_seg->p_paddr
5808 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5813 #undef IS_CONTAINED_BY_VMA
5814 #undef IS_CONTAINED_BY_LMA
5815 #undef IS_COREFILE_NOTE
5816 #undef IS_SOLARIS_PT_INTERP
5817 #undef IS_SECTION_IN_INPUT_SEGMENT
5818 #undef INCLUDE_SECTION_IN_SEGMENT
5819 #undef SEGMENT_AFTER_SEGMENT
5820 #undef SEGMENT_OVERLAPS
5824 /* Copy ELF program header information. */
5827 copy_elf_program_header (bfd *ibfd, bfd *obfd)
5829 Elf_Internal_Ehdr *iehdr;
5830 struct elf_segment_map *map;
5831 struct elf_segment_map *map_first;
5832 struct elf_segment_map **pointer_to_map;
5833 Elf_Internal_Phdr *segment;
5835 unsigned int num_segments;
5836 bfd_boolean phdr_included = FALSE;
5838 iehdr = elf_elfheader (ibfd);
5841 pointer_to_map = &map_first;
5843 num_segments = elf_elfheader (ibfd)->e_phnum;
5844 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5849 unsigned int section_count;
5851 Elf_Internal_Shdr *this_hdr;
5852 asection *first_section = NULL;
5854 /* FIXME: Do we need to copy PT_NULL segment? */
5855 if (segment->p_type == PT_NULL)
5858 /* Compute how many sections are in this segment. */
5859 for (section = ibfd->sections, section_count = 0;
5861 section = section->next)
5863 this_hdr = &(elf_section_data(section)->this_hdr);
5864 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5867 first_section = section;
5872 /* Allocate a segment map big enough to contain
5873 all of the sections we have selected. */
5874 amt = sizeof (struct elf_segment_map);
5875 if (section_count != 0)
5876 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5877 map = bfd_zalloc (obfd, amt);
5881 /* Initialize the fields of the output segment map with the
5884 map->p_type = segment->p_type;
5885 map->p_flags = segment->p_flags;
5886 map->p_flags_valid = 1;
5887 map->p_paddr = segment->p_paddr;
5888 map->p_paddr_valid = 1;
5889 map->p_align = segment->p_align;
5890 map->p_align_valid = 1;
5891 map->p_vaddr_offset = 0;
5893 /* Determine if this segment contains the ELF file header
5894 and if it contains the program headers themselves. */
5895 map->includes_filehdr = (segment->p_offset == 0
5896 && segment->p_filesz >= iehdr->e_ehsize);
5898 map->includes_phdrs = 0;
5899 if (! phdr_included || segment->p_type != PT_LOAD)
5901 map->includes_phdrs =
5902 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5903 && (segment->p_offset + segment->p_filesz
5904 >= ((bfd_vma) iehdr->e_phoff
5905 + iehdr->e_phnum * iehdr->e_phentsize)));
5907 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5908 phdr_included = TRUE;
5911 if (!map->includes_phdrs && !map->includes_filehdr)
5912 /* There is some other padding before the first section. */
5913 map->p_vaddr_offset = ((first_section ? first_section->lma : 0)
5914 - segment->p_paddr);
5916 if (section_count != 0)
5918 unsigned int isec = 0;
5920 for (section = first_section;
5922 section = section->next)
5924 this_hdr = &(elf_section_data(section)->this_hdr);
5925 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5927 map->sections[isec++] = section->output_section;
5928 if (isec == section_count)
5934 map->count = section_count;
5935 *pointer_to_map = map;
5936 pointer_to_map = &map->next;
5939 elf_tdata (obfd)->segment_map = map_first;
5943 /* Copy private BFD data. This copies or rewrites ELF program header
5947 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5949 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5950 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5953 if (elf_tdata (ibfd)->phdr == NULL)
5956 if (ibfd->xvec == obfd->xvec)
5958 /* Check to see if any sections in the input BFD
5959 covered by ELF program header have changed. */
5960 Elf_Internal_Phdr *segment;
5961 asection *section, *osec;
5962 unsigned int i, num_segments;
5963 Elf_Internal_Shdr *this_hdr;
5965 /* Initialize the segment mark field. */
5966 for (section = obfd->sections; section != NULL;
5967 section = section->next)
5968 section->segment_mark = FALSE;
5970 num_segments = elf_elfheader (ibfd)->e_phnum;
5971 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5975 /* PR binutils/3535. The Solaris linker always sets the p_paddr
5976 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
5977 which severly confuses things, so always regenerate the segment
5978 map in this case. */
5979 if (segment->p_paddr == 0
5980 && segment->p_memsz == 0
5981 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
5984 for (section = ibfd->sections;
5985 section != NULL; section = section->next)
5987 /* We mark the output section so that we know it comes
5988 from the input BFD. */
5989 osec = section->output_section;
5991 osec->segment_mark = TRUE;
5993 /* Check if this section is covered by the segment. */
5994 this_hdr = &(elf_section_data(section)->this_hdr);
5995 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5997 /* FIXME: Check if its output section is changed or
5998 removed. What else do we need to check? */
6000 || section->flags != osec->flags
6001 || section->lma != osec->lma
6002 || section->vma != osec->vma
6003 || section->size != osec->size
6004 || section->rawsize != osec->rawsize
6005 || section->alignment_power != osec->alignment_power)
6011 /* Check to see if any output section do not come from the
6013 for (section = obfd->sections; section != NULL;
6014 section = section->next)
6016 if (section->segment_mark == FALSE)
6019 section->segment_mark = FALSE;
6022 return copy_elf_program_header (ibfd, obfd);
6026 return rewrite_elf_program_header (ibfd, obfd);
6029 /* Initialize private output section information from input section. */
6032 _bfd_elf_init_private_section_data (bfd *ibfd,
6036 struct bfd_link_info *link_info)
6039 Elf_Internal_Shdr *ihdr, *ohdr;
6040 bfd_boolean need_group = link_info == NULL || link_info->relocatable;
6042 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6043 || obfd->xvec->flavour != bfd_target_elf_flavour)
6046 /* Don't copy the output ELF section type from input if the
6047 output BFD section flags have been set to something different.
6048 elf_fake_sections will set ELF section type based on BFD
6050 if (elf_section_type (osec) == SHT_NULL
6051 && (osec->flags == isec->flags || !osec->flags))
6052 elf_section_type (osec) = elf_section_type (isec);
6054 /* FIXME: Is this correct for all OS/PROC specific flags? */
6055 elf_section_flags (osec) |= (elf_section_flags (isec)
6056 & (SHF_MASKOS | SHF_MASKPROC));
6058 /* Set things up for objcopy and relocatable link. The output
6059 SHT_GROUP section will have its elf_next_in_group pointing back
6060 to the input group members. Ignore linker created group section.
6061 See elfNN_ia64_object_p in elfxx-ia64.c. */
6064 if (elf_sec_group (isec) == NULL
6065 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
6067 if (elf_section_flags (isec) & SHF_GROUP)
6068 elf_section_flags (osec) |= SHF_GROUP;
6069 elf_next_in_group (osec) = elf_next_in_group (isec);
6070 elf_group_name (osec) = elf_group_name (isec);
6074 ihdr = &elf_section_data (isec)->this_hdr;
6076 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
6077 don't use the output section of the linked-to section since it
6078 may be NULL at this point. */
6079 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
6081 ohdr = &elf_section_data (osec)->this_hdr;
6082 ohdr->sh_flags |= SHF_LINK_ORDER;
6083 elf_linked_to_section (osec) = elf_linked_to_section (isec);
6086 osec->use_rela_p = isec->use_rela_p;
6091 /* Copy private section information. This copies over the entsize
6092 field, and sometimes the info field. */
6095 _bfd_elf_copy_private_section_data (bfd *ibfd,
6100 Elf_Internal_Shdr *ihdr, *ohdr;
6102 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6103 || obfd->xvec->flavour != bfd_target_elf_flavour)
6106 ihdr = &elf_section_data (isec)->this_hdr;
6107 ohdr = &elf_section_data (osec)->this_hdr;
6109 ohdr->sh_entsize = ihdr->sh_entsize;
6111 if (ihdr->sh_type == SHT_SYMTAB
6112 || ihdr->sh_type == SHT_DYNSYM
6113 || ihdr->sh_type == SHT_GNU_verneed
6114 || ihdr->sh_type == SHT_GNU_verdef)
6115 ohdr->sh_info = ihdr->sh_info;
6117 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
6121 /* Copy private header information. */
6124 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
6128 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6129 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6132 /* Copy over private BFD data if it has not already been copied.
6133 This must be done here, rather than in the copy_private_bfd_data
6134 entry point, because the latter is called after the section
6135 contents have been set, which means that the program headers have
6136 already been worked out. */
6137 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
6139 if (! copy_private_bfd_data (ibfd, obfd))
6143 /* _bfd_elf_copy_private_section_data copied over the SHF_GROUP flag
6144 but this might be wrong if we deleted the group section. */
6145 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
6146 if (elf_section_type (isec) == SHT_GROUP
6147 && isec->output_section == NULL)
6149 asection *first = elf_next_in_group (isec);
6150 asection *s = first;
6153 if (s->output_section != NULL)
6155 elf_section_flags (s->output_section) &= ~SHF_GROUP;
6156 elf_group_name (s->output_section) = NULL;
6158 s = elf_next_in_group (s);
6167 /* Copy private symbol information. If this symbol is in a section
6168 which we did not map into a BFD section, try to map the section
6169 index correctly. We use special macro definitions for the mapped
6170 section indices; these definitions are interpreted by the
6171 swap_out_syms function. */
6173 #define MAP_ONESYMTAB (SHN_HIOS + 1)
6174 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
6175 #define MAP_STRTAB (SHN_HIOS + 3)
6176 #define MAP_SHSTRTAB (SHN_HIOS + 4)
6177 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
6180 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
6185 elf_symbol_type *isym, *osym;
6187 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6188 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6191 isym = elf_symbol_from (ibfd, isymarg);
6192 osym = elf_symbol_from (obfd, osymarg);
6196 && bfd_is_abs_section (isym->symbol.section))
6200 shndx = isym->internal_elf_sym.st_shndx;
6201 if (shndx == elf_onesymtab (ibfd))
6202 shndx = MAP_ONESYMTAB;
6203 else if (shndx == elf_dynsymtab (ibfd))
6204 shndx = MAP_DYNSYMTAB;
6205 else if (shndx == elf_tdata (ibfd)->strtab_section)
6207 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
6208 shndx = MAP_SHSTRTAB;
6209 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
6210 shndx = MAP_SYM_SHNDX;
6211 osym->internal_elf_sym.st_shndx = shndx;
6217 /* Swap out the symbols. */
6220 swap_out_syms (bfd *abfd,
6221 struct bfd_strtab_hash **sttp,
6224 const struct elf_backend_data *bed;
6227 struct bfd_strtab_hash *stt;
6228 Elf_Internal_Shdr *symtab_hdr;
6229 Elf_Internal_Shdr *symtab_shndx_hdr;
6230 Elf_Internal_Shdr *symstrtab_hdr;
6231 bfd_byte *outbound_syms;
6232 bfd_byte *outbound_shndx;
6235 bfd_boolean name_local_sections;
6237 if (!elf_map_symbols (abfd))
6240 /* Dump out the symtabs. */
6241 stt = _bfd_elf_stringtab_init ();
6245 bed = get_elf_backend_data (abfd);
6246 symcount = bfd_get_symcount (abfd);
6247 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6248 symtab_hdr->sh_type = SHT_SYMTAB;
6249 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6250 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6251 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
6252 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
6254 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6255 symstrtab_hdr->sh_type = SHT_STRTAB;
6257 outbound_syms = bfd_alloc2 (abfd, 1 + symcount, bed->s->sizeof_sym);
6258 if (outbound_syms == NULL)
6260 _bfd_stringtab_free (stt);
6263 symtab_hdr->contents = outbound_syms;
6265 outbound_shndx = NULL;
6266 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6267 if (symtab_shndx_hdr->sh_name != 0)
6269 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6270 outbound_shndx = bfd_zalloc2 (abfd, 1 + symcount,
6271 sizeof (Elf_External_Sym_Shndx));
6272 if (outbound_shndx == NULL)
6274 _bfd_stringtab_free (stt);
6278 symtab_shndx_hdr->contents = outbound_shndx;
6279 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6280 symtab_shndx_hdr->sh_size = amt;
6281 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6282 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6285 /* Now generate the data (for "contents"). */
6287 /* Fill in zeroth symbol and swap it out. */
6288 Elf_Internal_Sym sym;
6294 sym.st_shndx = SHN_UNDEF;
6295 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6296 outbound_syms += bed->s->sizeof_sym;
6297 if (outbound_shndx != NULL)
6298 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6302 = (bed->elf_backend_name_local_section_symbols
6303 && bed->elf_backend_name_local_section_symbols (abfd));
6305 syms = bfd_get_outsymbols (abfd);
6306 for (idx = 0; idx < symcount; idx++)
6308 Elf_Internal_Sym sym;
6309 bfd_vma value = syms[idx]->value;
6310 elf_symbol_type *type_ptr;
6311 flagword flags = syms[idx]->flags;
6314 if (!name_local_sections
6315 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6317 /* Local section symbols have no name. */
6322 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6325 if (sym.st_name == (unsigned long) -1)
6327 _bfd_stringtab_free (stt);
6332 type_ptr = elf_symbol_from (abfd, syms[idx]);
6334 if ((flags & BSF_SECTION_SYM) == 0
6335 && bfd_is_com_section (syms[idx]->section))
6337 /* ELF common symbols put the alignment into the `value' field,
6338 and the size into the `size' field. This is backwards from
6339 how BFD handles it, so reverse it here. */
6340 sym.st_size = value;
6341 if (type_ptr == NULL
6342 || type_ptr->internal_elf_sym.st_value == 0)
6343 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6345 sym.st_value = type_ptr->internal_elf_sym.st_value;
6346 sym.st_shndx = _bfd_elf_section_from_bfd_section
6347 (abfd, syms[idx]->section);
6351 asection *sec = syms[idx]->section;
6354 if (sec->output_section)
6356 value += sec->output_offset;
6357 sec = sec->output_section;
6360 /* Don't add in the section vma for relocatable output. */
6361 if (! relocatable_p)
6363 sym.st_value = value;
6364 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6366 if (bfd_is_abs_section (sec)
6368 && type_ptr->internal_elf_sym.st_shndx != 0)
6370 /* This symbol is in a real ELF section which we did
6371 not create as a BFD section. Undo the mapping done
6372 by copy_private_symbol_data. */
6373 shndx = type_ptr->internal_elf_sym.st_shndx;
6377 shndx = elf_onesymtab (abfd);
6380 shndx = elf_dynsymtab (abfd);
6383 shndx = elf_tdata (abfd)->strtab_section;
6386 shndx = elf_tdata (abfd)->shstrtab_section;
6389 shndx = elf_tdata (abfd)->symtab_shndx_section;
6397 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6403 /* Writing this would be a hell of a lot easier if
6404 we had some decent documentation on bfd, and
6405 knew what to expect of the library, and what to
6406 demand of applications. For example, it
6407 appears that `objcopy' might not set the
6408 section of a symbol to be a section that is
6409 actually in the output file. */
6410 sec2 = bfd_get_section_by_name (abfd, sec->name);
6413 _bfd_error_handler (_("\
6414 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6415 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6417 bfd_set_error (bfd_error_invalid_operation);
6418 _bfd_stringtab_free (stt);
6422 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6423 BFD_ASSERT (shndx != -1);
6427 sym.st_shndx = shndx;
6430 if ((flags & BSF_THREAD_LOCAL) != 0)
6432 else if ((flags & BSF_FUNCTION) != 0)
6434 else if ((flags & BSF_OBJECT) != 0)
6436 else if ((flags & BSF_RELC) != 0)
6438 else if ((flags & BSF_SRELC) != 0)
6443 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6446 /* Processor-specific types. */
6447 if (type_ptr != NULL
6448 && bed->elf_backend_get_symbol_type)
6449 type = ((*bed->elf_backend_get_symbol_type)
6450 (&type_ptr->internal_elf_sym, type));
6452 if (flags & BSF_SECTION_SYM)
6454 if (flags & BSF_GLOBAL)
6455 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6457 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6459 else if (bfd_is_com_section (syms[idx]->section))
6460 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6461 else if (bfd_is_und_section (syms[idx]->section))
6462 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6466 else if (flags & BSF_FILE)
6467 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6470 int bind = STB_LOCAL;
6472 if (flags & BSF_LOCAL)
6474 else if (flags & BSF_WEAK)
6476 else if (flags & BSF_GLOBAL)
6479 sym.st_info = ELF_ST_INFO (bind, type);
6482 if (type_ptr != NULL)
6483 sym.st_other = type_ptr->internal_elf_sym.st_other;
6487 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6488 outbound_syms += bed->s->sizeof_sym;
6489 if (outbound_shndx != NULL)
6490 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6494 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6495 symstrtab_hdr->sh_type = SHT_STRTAB;
6497 symstrtab_hdr->sh_flags = 0;
6498 symstrtab_hdr->sh_addr = 0;
6499 symstrtab_hdr->sh_entsize = 0;
6500 symstrtab_hdr->sh_link = 0;
6501 symstrtab_hdr->sh_info = 0;
6502 symstrtab_hdr->sh_addralign = 1;
6507 /* Return the number of bytes required to hold the symtab vector.
6509 Note that we base it on the count plus 1, since we will null terminate
6510 the vector allocated based on this size. However, the ELF symbol table
6511 always has a dummy entry as symbol #0, so it ends up even. */
6514 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6518 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6520 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6521 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6523 symtab_size -= sizeof (asymbol *);
6529 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6533 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6535 if (elf_dynsymtab (abfd) == 0)
6537 bfd_set_error (bfd_error_invalid_operation);
6541 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6542 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6544 symtab_size -= sizeof (asymbol *);
6550 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6553 return (asect->reloc_count + 1) * sizeof (arelent *);
6556 /* Canonicalize the relocs. */
6559 _bfd_elf_canonicalize_reloc (bfd *abfd,
6566 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6568 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6571 tblptr = section->relocation;
6572 for (i = 0; i < section->reloc_count; i++)
6573 *relptr++ = tblptr++;
6577 return section->reloc_count;
6581 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6583 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6584 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6587 bfd_get_symcount (abfd) = symcount;
6592 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6593 asymbol **allocation)
6595 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6596 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6599 bfd_get_dynamic_symcount (abfd) = symcount;
6603 /* Return the size required for the dynamic reloc entries. Any loadable
6604 section that was actually installed in the BFD, and has type SHT_REL
6605 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6606 dynamic reloc section. */
6609 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6614 if (elf_dynsymtab (abfd) == 0)
6616 bfd_set_error (bfd_error_invalid_operation);
6620 ret = sizeof (arelent *);
6621 for (s = abfd->sections; s != NULL; s = s->next)
6622 if ((s->flags & SEC_LOAD) != 0
6623 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6624 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6625 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6626 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6627 * sizeof (arelent *));
6632 /* Canonicalize the dynamic relocation entries. Note that we return the
6633 dynamic relocations as a single block, although they are actually
6634 associated with particular sections; the interface, which was
6635 designed for SunOS style shared libraries, expects that there is only
6636 one set of dynamic relocs. Any loadable section that was actually
6637 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6638 dynamic symbol table, is considered to be a dynamic reloc section. */
6641 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6645 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6649 if (elf_dynsymtab (abfd) == 0)
6651 bfd_set_error (bfd_error_invalid_operation);
6655 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6657 for (s = abfd->sections; s != NULL; s = s->next)
6659 if ((s->flags & SEC_LOAD) != 0
6660 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6661 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6662 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6667 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6669 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6671 for (i = 0; i < count; i++)
6682 /* Read in the version information. */
6685 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6687 bfd_byte *contents = NULL;
6688 unsigned int freeidx = 0;
6690 if (elf_dynverref (abfd) != 0)
6692 Elf_Internal_Shdr *hdr;
6693 Elf_External_Verneed *everneed;
6694 Elf_Internal_Verneed *iverneed;
6696 bfd_byte *contents_end;
6698 hdr = &elf_tdata (abfd)->dynverref_hdr;
6700 elf_tdata (abfd)->verref = bfd_zalloc2 (abfd, hdr->sh_info,
6701 sizeof (Elf_Internal_Verneed));
6702 if (elf_tdata (abfd)->verref == NULL)
6705 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6707 contents = bfd_malloc (hdr->sh_size);
6708 if (contents == NULL)
6710 error_return_verref:
6711 elf_tdata (abfd)->verref = NULL;
6712 elf_tdata (abfd)->cverrefs = 0;
6715 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6716 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6717 goto error_return_verref;
6719 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6720 goto error_return_verref;
6722 BFD_ASSERT (sizeof (Elf_External_Verneed)
6723 == sizeof (Elf_External_Vernaux));
6724 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6725 everneed = (Elf_External_Verneed *) contents;
6726 iverneed = elf_tdata (abfd)->verref;
6727 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6729 Elf_External_Vernaux *evernaux;
6730 Elf_Internal_Vernaux *ivernaux;
6733 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6735 iverneed->vn_bfd = abfd;
6737 iverneed->vn_filename =
6738 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6740 if (iverneed->vn_filename == NULL)
6741 goto error_return_verref;
6743 if (iverneed->vn_cnt == 0)
6744 iverneed->vn_auxptr = NULL;
6747 iverneed->vn_auxptr = bfd_alloc2 (abfd, iverneed->vn_cnt,
6748 sizeof (Elf_Internal_Vernaux));
6749 if (iverneed->vn_auxptr == NULL)
6750 goto error_return_verref;
6753 if (iverneed->vn_aux
6754 > (size_t) (contents_end - (bfd_byte *) everneed))
6755 goto error_return_verref;
6757 evernaux = ((Elf_External_Vernaux *)
6758 ((bfd_byte *) everneed + iverneed->vn_aux));
6759 ivernaux = iverneed->vn_auxptr;
6760 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6762 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6764 ivernaux->vna_nodename =
6765 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6766 ivernaux->vna_name);
6767 if (ivernaux->vna_nodename == NULL)
6768 goto error_return_verref;
6770 if (j + 1 < iverneed->vn_cnt)
6771 ivernaux->vna_nextptr = ivernaux + 1;
6773 ivernaux->vna_nextptr = NULL;
6775 if (ivernaux->vna_next
6776 > (size_t) (contents_end - (bfd_byte *) evernaux))
6777 goto error_return_verref;
6779 evernaux = ((Elf_External_Vernaux *)
6780 ((bfd_byte *) evernaux + ivernaux->vna_next));
6782 if (ivernaux->vna_other > freeidx)
6783 freeidx = ivernaux->vna_other;
6786 if (i + 1 < hdr->sh_info)
6787 iverneed->vn_nextref = iverneed + 1;
6789 iverneed->vn_nextref = NULL;
6791 if (iverneed->vn_next
6792 > (size_t) (contents_end - (bfd_byte *) everneed))
6793 goto error_return_verref;
6795 everneed = ((Elf_External_Verneed *)
6796 ((bfd_byte *) everneed + iverneed->vn_next));
6803 if (elf_dynverdef (abfd) != 0)
6805 Elf_Internal_Shdr *hdr;
6806 Elf_External_Verdef *everdef;
6807 Elf_Internal_Verdef *iverdef;
6808 Elf_Internal_Verdef *iverdefarr;
6809 Elf_Internal_Verdef iverdefmem;
6811 unsigned int maxidx;
6812 bfd_byte *contents_end_def, *contents_end_aux;
6814 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6816 contents = bfd_malloc (hdr->sh_size);
6817 if (contents == NULL)
6819 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6820 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6823 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
6826 BFD_ASSERT (sizeof (Elf_External_Verdef)
6827 >= sizeof (Elf_External_Verdaux));
6828 contents_end_def = contents + hdr->sh_size
6829 - sizeof (Elf_External_Verdef);
6830 contents_end_aux = contents + hdr->sh_size
6831 - sizeof (Elf_External_Verdaux);
6833 /* We know the number of entries in the section but not the maximum
6834 index. Therefore we have to run through all entries and find
6836 everdef = (Elf_External_Verdef *) contents;
6838 for (i = 0; i < hdr->sh_info; ++i)
6840 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6842 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6843 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6845 if (iverdefmem.vd_next
6846 > (size_t) (contents_end_def - (bfd_byte *) everdef))
6849 everdef = ((Elf_External_Verdef *)
6850 ((bfd_byte *) everdef + iverdefmem.vd_next));
6853 if (default_imported_symver)
6855 if (freeidx > maxidx)
6860 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, maxidx,
6861 sizeof (Elf_Internal_Verdef));
6862 if (elf_tdata (abfd)->verdef == NULL)
6865 elf_tdata (abfd)->cverdefs = maxidx;
6867 everdef = (Elf_External_Verdef *) contents;
6868 iverdefarr = elf_tdata (abfd)->verdef;
6869 for (i = 0; i < hdr->sh_info; i++)
6871 Elf_External_Verdaux *everdaux;
6872 Elf_Internal_Verdaux *iverdaux;
6875 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6877 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
6879 error_return_verdef:
6880 elf_tdata (abfd)->verdef = NULL;
6881 elf_tdata (abfd)->cverdefs = 0;
6885 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6886 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6888 iverdef->vd_bfd = abfd;
6890 if (iverdef->vd_cnt == 0)
6891 iverdef->vd_auxptr = NULL;
6894 iverdef->vd_auxptr = bfd_alloc2 (abfd, iverdef->vd_cnt,
6895 sizeof (Elf_Internal_Verdaux));
6896 if (iverdef->vd_auxptr == NULL)
6897 goto error_return_verdef;
6901 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
6902 goto error_return_verdef;
6904 everdaux = ((Elf_External_Verdaux *)
6905 ((bfd_byte *) everdef + iverdef->vd_aux));
6906 iverdaux = iverdef->vd_auxptr;
6907 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6909 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6911 iverdaux->vda_nodename =
6912 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6913 iverdaux->vda_name);
6914 if (iverdaux->vda_nodename == NULL)
6915 goto error_return_verdef;
6917 if (j + 1 < iverdef->vd_cnt)
6918 iverdaux->vda_nextptr = iverdaux + 1;
6920 iverdaux->vda_nextptr = NULL;
6922 if (iverdaux->vda_next
6923 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
6924 goto error_return_verdef;
6926 everdaux = ((Elf_External_Verdaux *)
6927 ((bfd_byte *) everdaux + iverdaux->vda_next));
6930 if (iverdef->vd_cnt)
6931 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6933 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
6934 iverdef->vd_nextdef = iverdef + 1;
6936 iverdef->vd_nextdef = NULL;
6938 everdef = ((Elf_External_Verdef *)
6939 ((bfd_byte *) everdef + iverdef->vd_next));
6945 else if (default_imported_symver)
6952 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, freeidx,
6953 sizeof (Elf_Internal_Verdef));
6954 if (elf_tdata (abfd)->verdef == NULL)
6957 elf_tdata (abfd)->cverdefs = freeidx;
6960 /* Create a default version based on the soname. */
6961 if (default_imported_symver)
6963 Elf_Internal_Verdef *iverdef;
6964 Elf_Internal_Verdaux *iverdaux;
6966 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6968 iverdef->vd_version = VER_DEF_CURRENT;
6969 iverdef->vd_flags = 0;
6970 iverdef->vd_ndx = freeidx;
6971 iverdef->vd_cnt = 1;
6973 iverdef->vd_bfd = abfd;
6975 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6976 if (iverdef->vd_nodename == NULL)
6977 goto error_return_verdef;
6978 iverdef->vd_nextdef = NULL;
6979 iverdef->vd_auxptr = bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
6980 if (iverdef->vd_auxptr == NULL)
6981 goto error_return_verdef;
6983 iverdaux = iverdef->vd_auxptr;
6984 iverdaux->vda_nodename = iverdef->vd_nodename;
6985 iverdaux->vda_nextptr = NULL;
6991 if (contents != NULL)
6997 _bfd_elf_make_empty_symbol (bfd *abfd)
6999 elf_symbol_type *newsym;
7000 bfd_size_type amt = sizeof (elf_symbol_type);
7002 newsym = bfd_zalloc (abfd, amt);
7007 newsym->symbol.the_bfd = abfd;
7008 return &newsym->symbol;
7013 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
7017 bfd_symbol_info (symbol, ret);
7020 /* Return whether a symbol name implies a local symbol. Most targets
7021 use this function for the is_local_label_name entry point, but some
7025 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
7028 /* Normal local symbols start with ``.L''. */
7029 if (name[0] == '.' && name[1] == 'L')
7032 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
7033 DWARF debugging symbols starting with ``..''. */
7034 if (name[0] == '.' && name[1] == '.')
7037 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
7038 emitting DWARF debugging output. I suspect this is actually a
7039 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
7040 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
7041 underscore to be emitted on some ELF targets). For ease of use,
7042 we treat such symbols as local. */
7043 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
7050 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
7051 asymbol *symbol ATTRIBUTE_UNUSED)
7058 _bfd_elf_set_arch_mach (bfd *abfd,
7059 enum bfd_architecture arch,
7060 unsigned long machine)
7062 /* If this isn't the right architecture for this backend, and this
7063 isn't the generic backend, fail. */
7064 if (arch != get_elf_backend_data (abfd)->arch
7065 && arch != bfd_arch_unknown
7066 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
7069 return bfd_default_set_arch_mach (abfd, arch, machine);
7072 /* Find the function to a particular section and offset,
7073 for error reporting. */
7076 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
7080 const char **filename_ptr,
7081 const char **functionname_ptr)
7083 const char *filename;
7084 asymbol *func, *file;
7087 /* ??? Given multiple file symbols, it is impossible to reliably
7088 choose the right file name for global symbols. File symbols are
7089 local symbols, and thus all file symbols must sort before any
7090 global symbols. The ELF spec may be interpreted to say that a
7091 file symbol must sort before other local symbols, but currently
7092 ld -r doesn't do this. So, for ld -r output, it is possible to
7093 make a better choice of file name for local symbols by ignoring
7094 file symbols appearing after a given local symbol. */
7095 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
7101 state = nothing_seen;
7103 for (p = symbols; *p != NULL; p++)
7107 q = (elf_symbol_type *) *p;
7109 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
7115 if (state == symbol_seen)
7116 state = file_after_symbol_seen;
7120 if (bfd_get_section (&q->symbol) == section
7121 && q->symbol.value >= low_func
7122 && q->symbol.value <= offset)
7124 func = (asymbol *) q;
7125 low_func = q->symbol.value;
7128 && (ELF_ST_BIND (q->internal_elf_sym.st_info) == STB_LOCAL
7129 || state != file_after_symbol_seen))
7130 filename = bfd_asymbol_name (file);
7134 if (state == nothing_seen)
7135 state = symbol_seen;
7142 *filename_ptr = filename;
7143 if (functionname_ptr)
7144 *functionname_ptr = bfd_asymbol_name (func);
7149 /* Find the nearest line to a particular section and offset,
7150 for error reporting. */
7153 _bfd_elf_find_nearest_line (bfd *abfd,
7157 const char **filename_ptr,
7158 const char **functionname_ptr,
7159 unsigned int *line_ptr)
7163 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
7164 filename_ptr, functionname_ptr,
7167 if (!*functionname_ptr)
7168 elf_find_function (abfd, section, symbols, offset,
7169 *filename_ptr ? NULL : filename_ptr,
7175 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
7176 filename_ptr, functionname_ptr,
7178 &elf_tdata (abfd)->dwarf2_find_line_info))
7180 if (!*functionname_ptr)
7181 elf_find_function (abfd, section, symbols, offset,
7182 *filename_ptr ? NULL : filename_ptr,
7188 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7189 &found, filename_ptr,
7190 functionname_ptr, line_ptr,
7191 &elf_tdata (abfd)->line_info))
7193 if (found && (*functionname_ptr || *line_ptr))
7196 if (symbols == NULL)
7199 if (! elf_find_function (abfd, section, symbols, offset,
7200 filename_ptr, functionname_ptr))
7207 /* Find the line for a symbol. */
7210 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
7211 const char **filename_ptr, unsigned int *line_ptr)
7213 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
7214 filename_ptr, line_ptr, 0,
7215 &elf_tdata (abfd)->dwarf2_find_line_info);
7218 /* After a call to bfd_find_nearest_line, successive calls to
7219 bfd_find_inliner_info can be used to get source information about
7220 each level of function inlining that terminated at the address
7221 passed to bfd_find_nearest_line. Currently this is only supported
7222 for DWARF2 with appropriate DWARF3 extensions. */
7225 _bfd_elf_find_inliner_info (bfd *abfd,
7226 const char **filename_ptr,
7227 const char **functionname_ptr,
7228 unsigned int *line_ptr)
7231 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7232 functionname_ptr, line_ptr,
7233 & elf_tdata (abfd)->dwarf2_find_line_info);
7238 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
7240 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7241 int ret = bed->s->sizeof_ehdr;
7243 if (!info->relocatable)
7245 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
7247 if (phdr_size == (bfd_size_type) -1)
7249 struct elf_segment_map *m;
7252 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
7253 phdr_size += bed->s->sizeof_phdr;
7256 phdr_size = get_program_header_size (abfd, info);
7259 elf_tdata (abfd)->program_header_size = phdr_size;
7267 _bfd_elf_set_section_contents (bfd *abfd,
7269 const void *location,
7271 bfd_size_type count)
7273 Elf_Internal_Shdr *hdr;
7276 if (! abfd->output_has_begun
7277 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7280 hdr = &elf_section_data (section)->this_hdr;
7281 pos = hdr->sh_offset + offset;
7282 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7283 || bfd_bwrite (location, count, abfd) != count)
7290 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7291 arelent *cache_ptr ATTRIBUTE_UNUSED,
7292 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7297 /* Try to convert a non-ELF reloc into an ELF one. */
7300 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7302 /* Check whether we really have an ELF howto. */
7304 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7306 bfd_reloc_code_real_type code;
7307 reloc_howto_type *howto;
7309 /* Alien reloc: Try to determine its type to replace it with an
7310 equivalent ELF reloc. */
7312 if (areloc->howto->pc_relative)
7314 switch (areloc->howto->bitsize)
7317 code = BFD_RELOC_8_PCREL;
7320 code = BFD_RELOC_12_PCREL;
7323 code = BFD_RELOC_16_PCREL;
7326 code = BFD_RELOC_24_PCREL;
7329 code = BFD_RELOC_32_PCREL;
7332 code = BFD_RELOC_64_PCREL;
7338 howto = bfd_reloc_type_lookup (abfd, code);
7340 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7342 if (howto->pcrel_offset)
7343 areloc->addend += areloc->address;
7345 areloc->addend -= areloc->address; /* addend is unsigned!! */
7350 switch (areloc->howto->bitsize)
7356 code = BFD_RELOC_14;
7359 code = BFD_RELOC_16;
7362 code = BFD_RELOC_26;
7365 code = BFD_RELOC_32;
7368 code = BFD_RELOC_64;
7374 howto = bfd_reloc_type_lookup (abfd, code);
7378 areloc->howto = howto;
7386 (*_bfd_error_handler)
7387 (_("%B: unsupported relocation type %s"),
7388 abfd, areloc->howto->name);
7389 bfd_set_error (bfd_error_bad_value);
7394 _bfd_elf_close_and_cleanup (bfd *abfd)
7396 if (bfd_get_format (abfd) == bfd_object)
7398 if (elf_tdata (abfd) != NULL && elf_shstrtab (abfd) != NULL)
7399 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7400 _bfd_dwarf2_cleanup_debug_info (abfd);
7403 return _bfd_generic_close_and_cleanup (abfd);
7406 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7407 in the relocation's offset. Thus we cannot allow any sort of sanity
7408 range-checking to interfere. There is nothing else to do in processing
7411 bfd_reloc_status_type
7412 _bfd_elf_rel_vtable_reloc_fn
7413 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7414 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7415 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7416 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7418 return bfd_reloc_ok;
7421 /* Elf core file support. Much of this only works on native
7422 toolchains, since we rely on knowing the
7423 machine-dependent procfs structure in order to pick
7424 out details about the corefile. */
7426 #ifdef HAVE_SYS_PROCFS_H
7427 # include <sys/procfs.h>
7430 /* FIXME: this is kinda wrong, but it's what gdb wants. */
7433 elfcore_make_pid (bfd *abfd)
7435 return ((elf_tdata (abfd)->core_lwpid << 16)
7436 + (elf_tdata (abfd)->core_pid));
7439 /* If there isn't a section called NAME, make one, using
7440 data from SECT. Note, this function will generate a
7441 reference to NAME, so you shouldn't deallocate or
7445 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7449 if (bfd_get_section_by_name (abfd, name) != NULL)
7452 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
7456 sect2->size = sect->size;
7457 sect2->filepos = sect->filepos;
7458 sect2->alignment_power = sect->alignment_power;
7462 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7463 actually creates up to two pseudosections:
7464 - For the single-threaded case, a section named NAME, unless
7465 such a section already exists.
7466 - For the multi-threaded case, a section named "NAME/PID", where
7467 PID is elfcore_make_pid (abfd).
7468 Both pseudosections have identical contents. */
7470 _bfd_elfcore_make_pseudosection (bfd *abfd,
7476 char *threaded_name;
7480 /* Build the section name. */
7482 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7483 len = strlen (buf) + 1;
7484 threaded_name = bfd_alloc (abfd, len);
7485 if (threaded_name == NULL)
7487 memcpy (threaded_name, buf, len);
7489 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
7494 sect->filepos = filepos;
7495 sect->alignment_power = 2;
7497 return elfcore_maybe_make_sect (abfd, name, sect);
7500 /* prstatus_t exists on:
7502 linux 2.[01] + glibc
7506 #if defined (HAVE_PRSTATUS_T)
7509 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7514 if (note->descsz == sizeof (prstatus_t))
7518 size = sizeof (prstat.pr_reg);
7519 offset = offsetof (prstatus_t, pr_reg);
7520 memcpy (&prstat, note->descdata, sizeof (prstat));
7522 /* Do not overwrite the core signal if it
7523 has already been set by another thread. */
7524 if (elf_tdata (abfd)->core_signal == 0)
7525 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7526 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7528 /* pr_who exists on:
7531 pr_who doesn't exist on:
7534 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7535 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7538 #if defined (HAVE_PRSTATUS32_T)
7539 else if (note->descsz == sizeof (prstatus32_t))
7541 /* 64-bit host, 32-bit corefile */
7542 prstatus32_t prstat;
7544 size = sizeof (prstat.pr_reg);
7545 offset = offsetof (prstatus32_t, pr_reg);
7546 memcpy (&prstat, note->descdata, sizeof (prstat));
7548 /* Do not overwrite the core signal if it
7549 has already been set by another thread. */
7550 if (elf_tdata (abfd)->core_signal == 0)
7551 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7552 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7554 /* pr_who exists on:
7557 pr_who doesn't exist on:
7560 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7561 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7564 #endif /* HAVE_PRSTATUS32_T */
7567 /* Fail - we don't know how to handle any other
7568 note size (ie. data object type). */
7572 /* Make a ".reg/999" section and a ".reg" section. */
7573 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7574 size, note->descpos + offset);
7576 #endif /* defined (HAVE_PRSTATUS_T) */
7578 /* Create a pseudosection containing the exact contents of NOTE. */
7580 elfcore_make_note_pseudosection (bfd *abfd,
7582 Elf_Internal_Note *note)
7584 return _bfd_elfcore_make_pseudosection (abfd, name,
7585 note->descsz, note->descpos);
7588 /* There isn't a consistent prfpregset_t across platforms,
7589 but it doesn't matter, because we don't have to pick this
7590 data structure apart. */
7593 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7595 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7598 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7599 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7603 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7605 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7608 #if defined (HAVE_PRPSINFO_T)
7609 typedef prpsinfo_t elfcore_psinfo_t;
7610 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7611 typedef prpsinfo32_t elfcore_psinfo32_t;
7615 #if defined (HAVE_PSINFO_T)
7616 typedef psinfo_t elfcore_psinfo_t;
7617 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7618 typedef psinfo32_t elfcore_psinfo32_t;
7622 /* return a malloc'ed copy of a string at START which is at
7623 most MAX bytes long, possibly without a terminating '\0'.
7624 the copy will always have a terminating '\0'. */
7627 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7630 char *end = memchr (start, '\0', max);
7638 dups = bfd_alloc (abfd, len + 1);
7642 memcpy (dups, start, len);
7648 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7650 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7652 if (note->descsz == sizeof (elfcore_psinfo_t))
7654 elfcore_psinfo_t psinfo;
7656 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7658 elf_tdata (abfd)->core_program
7659 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7660 sizeof (psinfo.pr_fname));
7662 elf_tdata (abfd)->core_command
7663 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7664 sizeof (psinfo.pr_psargs));
7666 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7667 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7669 /* 64-bit host, 32-bit corefile */
7670 elfcore_psinfo32_t psinfo;
7672 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7674 elf_tdata (abfd)->core_program
7675 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7676 sizeof (psinfo.pr_fname));
7678 elf_tdata (abfd)->core_command
7679 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7680 sizeof (psinfo.pr_psargs));
7686 /* Fail - we don't know how to handle any other
7687 note size (ie. data object type). */
7691 /* Note that for some reason, a spurious space is tacked
7692 onto the end of the args in some (at least one anyway)
7693 implementations, so strip it off if it exists. */
7696 char *command = elf_tdata (abfd)->core_command;
7697 int n = strlen (command);
7699 if (0 < n && command[n - 1] == ' ')
7700 command[n - 1] = '\0';
7705 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7707 #if defined (HAVE_PSTATUS_T)
7709 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7711 if (note->descsz == sizeof (pstatus_t)
7712 #if defined (HAVE_PXSTATUS_T)
7713 || note->descsz == sizeof (pxstatus_t)
7719 memcpy (&pstat, note->descdata, sizeof (pstat));
7721 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7723 #if defined (HAVE_PSTATUS32_T)
7724 else if (note->descsz == sizeof (pstatus32_t))
7726 /* 64-bit host, 32-bit corefile */
7729 memcpy (&pstat, note->descdata, sizeof (pstat));
7731 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7734 /* Could grab some more details from the "representative"
7735 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7736 NT_LWPSTATUS note, presumably. */
7740 #endif /* defined (HAVE_PSTATUS_T) */
7742 #if defined (HAVE_LWPSTATUS_T)
7744 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7746 lwpstatus_t lwpstat;
7752 if (note->descsz != sizeof (lwpstat)
7753 #if defined (HAVE_LWPXSTATUS_T)
7754 && note->descsz != sizeof (lwpxstatus_t)
7759 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7761 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7762 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7764 /* Make a ".reg/999" section. */
7766 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7767 len = strlen (buf) + 1;
7768 name = bfd_alloc (abfd, len);
7771 memcpy (name, buf, len);
7773 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7777 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7778 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7779 sect->filepos = note->descpos
7780 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7783 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7784 sect->size = sizeof (lwpstat.pr_reg);
7785 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7788 sect->alignment_power = 2;
7790 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7793 /* Make a ".reg2/999" section */
7795 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7796 len = strlen (buf) + 1;
7797 name = bfd_alloc (abfd, len);
7800 memcpy (name, buf, len);
7802 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7806 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7807 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7808 sect->filepos = note->descpos
7809 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7812 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7813 sect->size = sizeof (lwpstat.pr_fpreg);
7814 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7817 sect->alignment_power = 2;
7819 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7821 #endif /* defined (HAVE_LWPSTATUS_T) */
7823 #if defined (HAVE_WIN32_PSTATUS_T)
7825 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7831 win32_pstatus_t pstatus;
7833 if (note->descsz < sizeof (pstatus))
7836 memcpy (&pstatus, note->descdata, sizeof (pstatus));
7838 switch (pstatus.data_type)
7840 case NOTE_INFO_PROCESS:
7841 /* FIXME: need to add ->core_command. */
7842 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
7843 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
7846 case NOTE_INFO_THREAD:
7847 /* Make a ".reg/999" section. */
7848 sprintf (buf, ".reg/%ld", (long) pstatus.data.thread_info.tid);
7850 len = strlen (buf) + 1;
7851 name = bfd_alloc (abfd, len);
7855 memcpy (name, buf, len);
7857 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7861 sect->size = sizeof (pstatus.data.thread_info.thread_context);
7862 sect->filepos = (note->descpos
7863 + offsetof (struct win32_pstatus,
7864 data.thread_info.thread_context));
7865 sect->alignment_power = 2;
7867 if (pstatus.data.thread_info.is_active_thread)
7868 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7872 case NOTE_INFO_MODULE:
7873 /* Make a ".module/xxxxxxxx" section. */
7874 sprintf (buf, ".module/%08lx",
7875 (long) pstatus.data.module_info.base_address);
7877 len = strlen (buf) + 1;
7878 name = bfd_alloc (abfd, len);
7882 memcpy (name, buf, len);
7884 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7889 sect->size = note->descsz;
7890 sect->filepos = note->descpos;
7891 sect->alignment_power = 2;
7900 #endif /* HAVE_WIN32_PSTATUS_T */
7903 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7905 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7913 if (bed->elf_backend_grok_prstatus)
7914 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7916 #if defined (HAVE_PRSTATUS_T)
7917 return elfcore_grok_prstatus (abfd, note);
7922 #if defined (HAVE_PSTATUS_T)
7924 return elfcore_grok_pstatus (abfd, note);
7927 #if defined (HAVE_LWPSTATUS_T)
7929 return elfcore_grok_lwpstatus (abfd, note);
7932 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7933 return elfcore_grok_prfpreg (abfd, note);
7935 #if defined (HAVE_WIN32_PSTATUS_T)
7936 case NT_WIN32PSTATUS:
7937 return elfcore_grok_win32pstatus (abfd, note);
7940 case NT_PRXFPREG: /* Linux SSE extension */
7941 if (note->namesz == 6
7942 && strcmp (note->namedata, "LINUX") == 0)
7943 return elfcore_grok_prxfpreg (abfd, note);
7949 if (bed->elf_backend_grok_psinfo)
7950 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7952 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7953 return elfcore_grok_psinfo (abfd, note);
7960 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
7965 sect->size = note->descsz;
7966 sect->filepos = note->descpos;
7967 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7975 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
7979 cp = strchr (note->namedata, '@');
7982 *lwpidp = atoi(cp + 1);
7989 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
7992 /* Signal number at offset 0x08. */
7993 elf_tdata (abfd)->core_signal
7994 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7996 /* Process ID at offset 0x50. */
7997 elf_tdata (abfd)->core_pid
7998 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
8000 /* Command name at 0x7c (max 32 bytes, including nul). */
8001 elf_tdata (abfd)->core_command
8002 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
8004 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
8009 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
8013 if (elfcore_netbsd_get_lwpid (note, &lwp))
8014 elf_tdata (abfd)->core_lwpid = lwp;
8016 if (note->type == NT_NETBSDCORE_PROCINFO)
8018 /* NetBSD-specific core "procinfo". Note that we expect to
8019 find this note before any of the others, which is fine,
8020 since the kernel writes this note out first when it
8021 creates a core file. */
8023 return elfcore_grok_netbsd_procinfo (abfd, note);
8026 /* As of Jan 2002 there are no other machine-independent notes
8027 defined for NetBSD core files. If the note type is less
8028 than the start of the machine-dependent note types, we don't
8031 if (note->type < NT_NETBSDCORE_FIRSTMACH)
8035 switch (bfd_get_arch (abfd))
8037 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
8038 PT_GETFPREGS == mach+2. */
8040 case bfd_arch_alpha:
8041 case bfd_arch_sparc:
8044 case NT_NETBSDCORE_FIRSTMACH+0:
8045 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8047 case NT_NETBSDCORE_FIRSTMACH+2:
8048 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8054 /* On all other arch's, PT_GETREGS == mach+1 and
8055 PT_GETFPREGS == mach+3. */
8060 case NT_NETBSDCORE_FIRSTMACH+1:
8061 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8063 case NT_NETBSDCORE_FIRSTMACH+3:
8064 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8074 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
8076 void *ddata = note->descdata;
8083 /* nto_procfs_status 'pid' field is at offset 0. */
8084 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
8086 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
8087 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
8089 /* nto_procfs_status 'flags' field is at offset 8. */
8090 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
8092 /* nto_procfs_status 'what' field is at offset 14. */
8093 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
8095 elf_tdata (abfd)->core_signal = sig;
8096 elf_tdata (abfd)->core_lwpid = *tid;
8099 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
8100 do not come from signals so we make sure we set the current
8101 thread just in case. */
8102 if (flags & 0x00000080)
8103 elf_tdata (abfd)->core_lwpid = *tid;
8105 /* Make a ".qnx_core_status/%d" section. */
8106 sprintf (buf, ".qnx_core_status/%ld", *tid);
8108 name = bfd_alloc (abfd, strlen (buf) + 1);
8113 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8117 sect->size = note->descsz;
8118 sect->filepos = note->descpos;
8119 sect->alignment_power = 2;
8121 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
8125 elfcore_grok_nto_regs (bfd *abfd,
8126 Elf_Internal_Note *note,
8134 /* Make a "(base)/%d" section. */
8135 sprintf (buf, "%s/%ld", base, tid);
8137 name = bfd_alloc (abfd, strlen (buf) + 1);
8142 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8146 sect->size = note->descsz;
8147 sect->filepos = note->descpos;
8148 sect->alignment_power = 2;
8150 /* This is the current thread. */
8151 if (elf_tdata (abfd)->core_lwpid == tid)
8152 return elfcore_maybe_make_sect (abfd, base, sect);
8157 #define BFD_QNT_CORE_INFO 7
8158 #define BFD_QNT_CORE_STATUS 8
8159 #define BFD_QNT_CORE_GREG 9
8160 #define BFD_QNT_CORE_FPREG 10
8163 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
8165 /* Every GREG section has a STATUS section before it. Store the
8166 tid from the previous call to pass down to the next gregs
8168 static long tid = 1;
8172 case BFD_QNT_CORE_INFO:
8173 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
8174 case BFD_QNT_CORE_STATUS:
8175 return elfcore_grok_nto_status (abfd, note, &tid);
8176 case BFD_QNT_CORE_GREG:
8177 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
8178 case BFD_QNT_CORE_FPREG:
8179 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
8185 /* Function: elfcore_write_note
8188 buffer to hold note, and current size of buffer
8192 size of data for note
8194 Writes note to end of buffer. ELF64 notes are written exactly as
8195 for ELF32, despite the current (as of 2006) ELF gabi specifying
8196 that they ought to have 8-byte namesz and descsz field, and have
8197 8-byte alignment. Other writers, eg. Linux kernel, do the same.
8200 Pointer to realloc'd buffer, *BUFSIZ updated. */
8203 elfcore_write_note (bfd *abfd,
8211 Elf_External_Note *xnp;
8218 namesz = strlen (name) + 1;
8220 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
8222 buf = realloc (buf, *bufsiz + newspace);
8223 dest = buf + *bufsiz;
8224 *bufsiz += newspace;
8225 xnp = (Elf_External_Note *) dest;
8226 H_PUT_32 (abfd, namesz, xnp->namesz);
8227 H_PUT_32 (abfd, size, xnp->descsz);
8228 H_PUT_32 (abfd, type, xnp->type);
8232 memcpy (dest, name, namesz);
8240 memcpy (dest, input, size);
8250 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8252 elfcore_write_prpsinfo (bfd *abfd,
8258 const char *note_name = "CORE";
8259 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8261 if (bed->elf_backend_write_core_note != NULL)
8264 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8265 NT_PRPSINFO, fname, psargs);
8270 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8271 if (bed->s->elfclass == ELFCLASS32)
8273 #if defined (HAVE_PSINFO32_T)
8275 int note_type = NT_PSINFO;
8278 int note_type = NT_PRPSINFO;
8281 memset (&data, 0, sizeof (data));
8282 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8283 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8284 return elfcore_write_note (abfd, buf, bufsiz,
8285 note_name, note_type, &data, sizeof (data));
8290 #if defined (HAVE_PSINFO_T)
8292 int note_type = NT_PSINFO;
8295 int note_type = NT_PRPSINFO;
8298 memset (&data, 0, sizeof (data));
8299 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8300 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8301 return elfcore_write_note (abfd, buf, bufsiz,
8302 note_name, note_type, &data, sizeof (data));
8305 #endif /* PSINFO_T or PRPSINFO_T */
8307 #if defined (HAVE_PRSTATUS_T)
8309 elfcore_write_prstatus (bfd *abfd,
8316 const char *note_name = "CORE";
8317 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8319 if (bed->elf_backend_write_core_note != NULL)
8322 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8324 pid, cursig, gregs);
8329 #if defined (HAVE_PRSTATUS32_T)
8330 if (bed->s->elfclass == ELFCLASS32)
8332 prstatus32_t prstat;
8334 memset (&prstat, 0, sizeof (prstat));
8335 prstat.pr_pid = pid;
8336 prstat.pr_cursig = cursig;
8337 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8338 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8339 NT_PRSTATUS, &prstat, sizeof (prstat));
8346 memset (&prstat, 0, sizeof (prstat));
8347 prstat.pr_pid = pid;
8348 prstat.pr_cursig = cursig;
8349 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8350 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8351 NT_PRSTATUS, &prstat, sizeof (prstat));
8354 #endif /* HAVE_PRSTATUS_T */
8356 #if defined (HAVE_LWPSTATUS_T)
8358 elfcore_write_lwpstatus (bfd *abfd,
8365 lwpstatus_t lwpstat;
8366 const char *note_name = "CORE";
8368 memset (&lwpstat, 0, sizeof (lwpstat));
8369 lwpstat.pr_lwpid = pid >> 16;
8370 lwpstat.pr_cursig = cursig;
8371 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8372 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
8373 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8375 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
8376 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
8378 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
8379 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
8382 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8383 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
8385 #endif /* HAVE_LWPSTATUS_T */
8387 #if defined (HAVE_PSTATUS_T)
8389 elfcore_write_pstatus (bfd *abfd,
8393 int cursig ATTRIBUTE_UNUSED,
8394 const void *gregs ATTRIBUTE_UNUSED)
8396 const char *note_name = "CORE";
8397 #if defined (HAVE_PSTATUS32_T)
8398 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8400 if (bed->s->elfclass == ELFCLASS32)
8404 memset (&pstat, 0, sizeof (pstat));
8405 pstat.pr_pid = pid & 0xffff;
8406 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8407 NT_PSTATUS, &pstat, sizeof (pstat));
8415 memset (&pstat, 0, sizeof (pstat));
8416 pstat.pr_pid = pid & 0xffff;
8417 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8418 NT_PSTATUS, &pstat, sizeof (pstat));
8422 #endif /* HAVE_PSTATUS_T */
8425 elfcore_write_prfpreg (bfd *abfd,
8431 const char *note_name = "CORE";
8432 return elfcore_write_note (abfd, buf, bufsiz,
8433 note_name, NT_FPREGSET, fpregs, size);
8437 elfcore_write_prxfpreg (bfd *abfd,
8440 const void *xfpregs,
8443 char *note_name = "LINUX";
8444 return elfcore_write_note (abfd, buf, bufsiz,
8445 note_name, NT_PRXFPREG, xfpregs, size);
8449 elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
8457 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
8460 buf = bfd_malloc (size);
8464 if (bfd_bread (buf, size, abfd) != size)
8472 while (p < buf + size)
8474 /* FIXME: bad alignment assumption. */
8475 Elf_External_Note *xnp = (Elf_External_Note *) p;
8476 Elf_Internal_Note in;
8478 in.type = H_GET_32 (abfd, xnp->type);
8480 in.namesz = H_GET_32 (abfd, xnp->namesz);
8481 in.namedata = xnp->name;
8483 in.descsz = H_GET_32 (abfd, xnp->descsz);
8484 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
8485 in.descpos = offset + (in.descdata - buf);
8487 if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
8489 if (! elfcore_grok_netbsd_note (abfd, &in))
8492 else if (CONST_STRNEQ (in.namedata, "QNX"))
8494 if (! elfcore_grok_nto_note (abfd, &in))
8499 if (! elfcore_grok_note (abfd, &in))
8503 p = in.descdata + BFD_ALIGN (in.descsz, 4);
8510 /* Providing external access to the ELF program header table. */
8512 /* Return an upper bound on the number of bytes required to store a
8513 copy of ABFD's program header table entries. Return -1 if an error
8514 occurs; bfd_get_error will return an appropriate code. */
8517 bfd_get_elf_phdr_upper_bound (bfd *abfd)
8519 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8521 bfd_set_error (bfd_error_wrong_format);
8525 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
8528 /* Copy ABFD's program header table entries to *PHDRS. The entries
8529 will be stored as an array of Elf_Internal_Phdr structures, as
8530 defined in include/elf/internal.h. To find out how large the
8531 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8533 Return the number of program header table entries read, or -1 if an
8534 error occurs; bfd_get_error will return an appropriate code. */
8537 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
8541 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8543 bfd_set_error (bfd_error_wrong_format);
8547 num_phdrs = elf_elfheader (abfd)->e_phnum;
8548 memcpy (phdrs, elf_tdata (abfd)->phdr,
8549 num_phdrs * sizeof (Elf_Internal_Phdr));
8555 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
8558 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8560 i_ehdrp = elf_elfheader (abfd);
8561 if (i_ehdrp == NULL)
8562 sprintf_vma (buf, value);
8565 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8567 #if BFD_HOST_64BIT_LONG
8568 sprintf (buf, "%016lx", value);
8570 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
8571 _bfd_int64_low (value));
8575 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
8578 sprintf_vma (buf, value);
8583 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
8586 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8588 i_ehdrp = elf_elfheader (abfd);
8589 if (i_ehdrp == NULL)
8590 fprintf_vma ((FILE *) stream, value);
8593 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8595 #if BFD_HOST_64BIT_LONG
8596 fprintf ((FILE *) stream, "%016lx", value);
8598 fprintf ((FILE *) stream, "%08lx%08lx",
8599 _bfd_int64_high (value), _bfd_int64_low (value));
8603 fprintf ((FILE *) stream, "%08lx",
8604 (unsigned long) (value & 0xffffffff));
8607 fprintf_vma ((FILE *) stream, value);
8611 enum elf_reloc_type_class
8612 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
8614 return reloc_class_normal;
8617 /* For RELA architectures, return the relocation value for a
8618 relocation against a local symbol. */
8621 _bfd_elf_rela_local_sym (bfd *abfd,
8622 Elf_Internal_Sym *sym,
8624 Elf_Internal_Rela *rel)
8626 asection *sec = *psec;
8629 relocation = (sec->output_section->vma
8630 + sec->output_offset
8632 if ((sec->flags & SEC_MERGE)
8633 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
8634 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
8637 _bfd_merged_section_offset (abfd, psec,
8638 elf_section_data (sec)->sec_info,
8639 sym->st_value + rel->r_addend);
8642 /* If we have changed the section, and our original section is
8643 marked with SEC_EXCLUDE, it means that the original
8644 SEC_MERGE section has been completely subsumed in some
8645 other SEC_MERGE section. In this case, we need to leave
8646 some info around for --emit-relocs. */
8647 if ((sec->flags & SEC_EXCLUDE) != 0)
8648 sec->kept_section = *psec;
8651 rel->r_addend -= relocation;
8652 rel->r_addend += sec->output_section->vma + sec->output_offset;
8658 _bfd_elf_rel_local_sym (bfd *abfd,
8659 Elf_Internal_Sym *sym,
8663 asection *sec = *psec;
8665 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
8666 return sym->st_value + addend;
8668 return _bfd_merged_section_offset (abfd, psec,
8669 elf_section_data (sec)->sec_info,
8670 sym->st_value + addend);
8674 _bfd_elf_section_offset (bfd *abfd,
8675 struct bfd_link_info *info,
8679 switch (sec->sec_info_type)
8681 case ELF_INFO_TYPE_STABS:
8682 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
8684 case ELF_INFO_TYPE_EH_FRAME:
8685 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
8691 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8692 reconstruct an ELF file by reading the segments out of remote memory
8693 based on the ELF file header at EHDR_VMA and the ELF program headers it
8694 points to. If not null, *LOADBASEP is filled in with the difference
8695 between the VMAs from which the segments were read, and the VMAs the
8696 file headers (and hence BFD's idea of each section's VMA) put them at.
8698 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8699 remote memory at target address VMA into the local buffer at MYADDR; it
8700 should return zero on success or an `errno' code on failure. TEMPL must
8701 be a BFD for an ELF target with the word size and byte order found in
8702 the remote memory. */
8705 bfd_elf_bfd_from_remote_memory
8709 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
8711 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
8712 (templ, ehdr_vma, loadbasep, target_read_memory);
8716 _bfd_elf_get_synthetic_symtab (bfd *abfd,
8717 long symcount ATTRIBUTE_UNUSED,
8718 asymbol **syms ATTRIBUTE_UNUSED,
8723 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8726 const char *relplt_name;
8727 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8731 Elf_Internal_Shdr *hdr;
8737 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
8740 if (dynsymcount <= 0)
8743 if (!bed->plt_sym_val)
8746 relplt_name = bed->relplt_name;
8747 if (relplt_name == NULL)
8748 relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
8749 relplt = bfd_get_section_by_name (abfd, relplt_name);
8753 hdr = &elf_section_data (relplt)->this_hdr;
8754 if (hdr->sh_link != elf_dynsymtab (abfd)
8755 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
8758 plt = bfd_get_section_by_name (abfd, ".plt");
8762 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8763 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
8766 count = relplt->size / hdr->sh_entsize;
8767 size = count * sizeof (asymbol);
8768 p = relplt->relocation;
8769 for (i = 0; i < count; i++, s++, p++)
8770 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
8772 s = *ret = bfd_malloc (size);
8776 names = (char *) (s + count);
8777 p = relplt->relocation;
8779 for (i = 0; i < count; i++, s++, p++)
8784 addr = bed->plt_sym_val (i, plt, p);
8785 if (addr == (bfd_vma) -1)
8788 *s = **p->sym_ptr_ptr;
8789 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8790 we are defining a symbol, ensure one of them is set. */
8791 if ((s->flags & BSF_LOCAL) == 0)
8792 s->flags |= BSF_GLOBAL;
8794 s->value = addr - plt->vma;
8796 len = strlen ((*p->sym_ptr_ptr)->name);
8797 memcpy (names, (*p->sym_ptr_ptr)->name, len);
8799 memcpy (names, "@plt", sizeof ("@plt"));
8800 names += sizeof ("@plt");
8807 struct elf_symbuf_symbol
8809 unsigned long st_name; /* Symbol name, index in string tbl */
8810 unsigned char st_info; /* Type and binding attributes */
8811 unsigned char st_other; /* Visibilty, and target specific */
8814 struct elf_symbuf_head
8816 struct elf_symbuf_symbol *ssym;
8817 bfd_size_type count;
8818 unsigned int st_shndx;
8825 Elf_Internal_Sym *isym;
8826 struct elf_symbuf_symbol *ssym;
8831 /* Sort references to symbols by ascending section number. */
8834 elf_sort_elf_symbol (const void *arg1, const void *arg2)
8836 const Elf_Internal_Sym *s1 = *(const Elf_Internal_Sym **) arg1;
8837 const Elf_Internal_Sym *s2 = *(const Elf_Internal_Sym **) arg2;
8839 return s1->st_shndx - s2->st_shndx;
8843 elf_sym_name_compare (const void *arg1, const void *arg2)
8845 const struct elf_symbol *s1 = (const struct elf_symbol *) arg1;
8846 const struct elf_symbol *s2 = (const struct elf_symbol *) arg2;
8847 return strcmp (s1->name, s2->name);
8850 static struct elf_symbuf_head *
8851 elf_create_symbuf (bfd_size_type symcount, Elf_Internal_Sym *isymbuf)
8853 Elf_Internal_Sym **ind, **indbufend, **indbuf
8854 = bfd_malloc2 (symcount, sizeof (*indbuf));
8855 struct elf_symbuf_symbol *ssym;
8856 struct elf_symbuf_head *ssymbuf, *ssymhead;
8857 bfd_size_type i, shndx_count;
8862 for (ind = indbuf, i = 0; i < symcount; i++)
8863 if (isymbuf[i].st_shndx != SHN_UNDEF)
8864 *ind++ = &isymbuf[i];
8867 qsort (indbuf, indbufend - indbuf, sizeof (Elf_Internal_Sym *),
8868 elf_sort_elf_symbol);
8871 if (indbufend > indbuf)
8872 for (ind = indbuf, shndx_count++; ind < indbufend - 1; ind++)
8873 if (ind[0]->st_shndx != ind[1]->st_shndx)
8876 ssymbuf = bfd_malloc ((shndx_count + 1) * sizeof (*ssymbuf)
8877 + (indbufend - indbuf) * sizeof (*ssymbuf));
8878 if (ssymbuf == NULL)
8884 ssym = (struct elf_symbuf_symbol *) (ssymbuf + shndx_count);
8885 ssymbuf->ssym = NULL;
8886 ssymbuf->count = shndx_count;
8887 ssymbuf->st_shndx = 0;
8888 for (ssymhead = ssymbuf, ind = indbuf; ind < indbufend; ssym++, ind++)
8890 if (ind == indbuf || ssymhead->st_shndx != (*ind)->st_shndx)
8893 ssymhead->ssym = ssym;
8894 ssymhead->count = 0;
8895 ssymhead->st_shndx = (*ind)->st_shndx;
8897 ssym->st_name = (*ind)->st_name;
8898 ssym->st_info = (*ind)->st_info;
8899 ssym->st_other = (*ind)->st_other;
8902 BFD_ASSERT ((bfd_size_type) (ssymhead - ssymbuf) == shndx_count);
8908 /* Check if 2 sections define the same set of local and global
8912 bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2,
8913 struct bfd_link_info *info)
8916 const struct elf_backend_data *bed1, *bed2;
8917 Elf_Internal_Shdr *hdr1, *hdr2;
8918 bfd_size_type symcount1, symcount2;
8919 Elf_Internal_Sym *isymbuf1, *isymbuf2;
8920 struct elf_symbuf_head *ssymbuf1, *ssymbuf2;
8921 Elf_Internal_Sym *isym, *isymend;
8922 struct elf_symbol *symtable1 = NULL, *symtable2 = NULL;
8923 bfd_size_type count1, count2, i;
8930 /* If both are .gnu.linkonce sections, they have to have the same
8932 if (CONST_STRNEQ (sec1->name, ".gnu.linkonce")
8933 && CONST_STRNEQ (sec2->name, ".gnu.linkonce"))
8934 return strcmp (sec1->name + sizeof ".gnu.linkonce",
8935 sec2->name + sizeof ".gnu.linkonce") == 0;
8937 /* Both sections have to be in ELF. */
8938 if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour
8939 || bfd_get_flavour (bfd2) != bfd_target_elf_flavour)
8942 if (elf_section_type (sec1) != elf_section_type (sec2))
8945 if ((elf_section_flags (sec1) & SHF_GROUP) != 0
8946 && (elf_section_flags (sec2) & SHF_GROUP) != 0)
8948 /* If both are members of section groups, they have to have the
8950 if (strcmp (elf_group_name (sec1), elf_group_name (sec2)) != 0)
8954 shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1);
8955 shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2);
8956 if (shndx1 == -1 || shndx2 == -1)
8959 bed1 = get_elf_backend_data (bfd1);
8960 bed2 = get_elf_backend_data (bfd2);
8961 hdr1 = &elf_tdata (bfd1)->symtab_hdr;
8962 symcount1 = hdr1->sh_size / bed1->s->sizeof_sym;
8963 hdr2 = &elf_tdata (bfd2)->symtab_hdr;
8964 symcount2 = hdr2->sh_size / bed2->s->sizeof_sym;
8966 if (symcount1 == 0 || symcount2 == 0)
8972 ssymbuf1 = elf_tdata (bfd1)->symbuf;
8973 ssymbuf2 = elf_tdata (bfd2)->symbuf;
8975 if (ssymbuf1 == NULL)
8977 isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0,
8979 if (isymbuf1 == NULL)
8982 if (!info->reduce_memory_overheads)
8983 elf_tdata (bfd1)->symbuf = ssymbuf1
8984 = elf_create_symbuf (symcount1, isymbuf1);
8987 if (ssymbuf1 == NULL || ssymbuf2 == NULL)
8989 isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0,
8991 if (isymbuf2 == NULL)
8994 if (ssymbuf1 != NULL && !info->reduce_memory_overheads)
8995 elf_tdata (bfd2)->symbuf = ssymbuf2
8996 = elf_create_symbuf (symcount2, isymbuf2);
8999 if (ssymbuf1 != NULL && ssymbuf2 != NULL)
9001 /* Optimized faster version. */
9002 bfd_size_type lo, hi, mid;
9003 struct elf_symbol *symp;
9004 struct elf_symbuf_symbol *ssym, *ssymend;
9007 hi = ssymbuf1->count;
9012 mid = (lo + hi) / 2;
9013 if ((unsigned int) shndx1 < ssymbuf1[mid].st_shndx)
9015 else if ((unsigned int) shndx1 > ssymbuf1[mid].st_shndx)
9019 count1 = ssymbuf1[mid].count;
9026 hi = ssymbuf2->count;
9031 mid = (lo + hi) / 2;
9032 if ((unsigned int) shndx2 < ssymbuf2[mid].st_shndx)
9034 else if ((unsigned int) shndx2 > ssymbuf2[mid].st_shndx)
9038 count2 = ssymbuf2[mid].count;
9044 if (count1 == 0 || count2 == 0 || count1 != count2)
9047 symtable1 = bfd_malloc (count1 * sizeof (struct elf_symbol));
9048 symtable2 = bfd_malloc (count2 * sizeof (struct elf_symbol));
9049 if (symtable1 == NULL || symtable2 == NULL)
9053 for (ssym = ssymbuf1->ssym, ssymend = ssym + count1;
9054 ssym < ssymend; ssym++, symp++)
9056 symp->u.ssym = ssym;
9057 symp->name = bfd_elf_string_from_elf_section (bfd1,
9063 for (ssym = ssymbuf2->ssym, ssymend = ssym + count2;
9064 ssym < ssymend; ssym++, symp++)
9066 symp->u.ssym = ssym;
9067 symp->name = bfd_elf_string_from_elf_section (bfd2,
9072 /* Sort symbol by name. */
9073 qsort (symtable1, count1, sizeof (struct elf_symbol),
9074 elf_sym_name_compare);
9075 qsort (symtable2, count1, sizeof (struct elf_symbol),
9076 elf_sym_name_compare);
9078 for (i = 0; i < count1; i++)
9079 /* Two symbols must have the same binding, type and name. */
9080 if (symtable1 [i].u.ssym->st_info != symtable2 [i].u.ssym->st_info
9081 || symtable1 [i].u.ssym->st_other != symtable2 [i].u.ssym->st_other
9082 || strcmp (symtable1 [i].name, symtable2 [i].name) != 0)
9089 symtable1 = bfd_malloc (symcount1 * sizeof (struct elf_symbol));
9090 symtable2 = bfd_malloc (symcount2 * sizeof (struct elf_symbol));
9091 if (symtable1 == NULL || symtable2 == NULL)
9094 /* Count definitions in the section. */
9096 for (isym = isymbuf1, isymend = isym + symcount1; isym < isymend; isym++)
9097 if (isym->st_shndx == (unsigned int) shndx1)
9098 symtable1[count1++].u.isym = isym;
9101 for (isym = isymbuf2, isymend = isym + symcount2; isym < isymend; isym++)
9102 if (isym->st_shndx == (unsigned int) shndx2)
9103 symtable2[count2++].u.isym = isym;
9105 if (count1 == 0 || count2 == 0 || count1 != count2)
9108 for (i = 0; i < count1; i++)
9110 = bfd_elf_string_from_elf_section (bfd1, hdr1->sh_link,
9111 symtable1[i].u.isym->st_name);
9113 for (i = 0; i < count2; i++)
9115 = bfd_elf_string_from_elf_section (bfd2, hdr2->sh_link,
9116 symtable2[i].u.isym->st_name);
9118 /* Sort symbol by name. */
9119 qsort (symtable1, count1, sizeof (struct elf_symbol),
9120 elf_sym_name_compare);
9121 qsort (symtable2, count1, sizeof (struct elf_symbol),
9122 elf_sym_name_compare);
9124 for (i = 0; i < count1; i++)
9125 /* Two symbols must have the same binding, type and name. */
9126 if (symtable1 [i].u.isym->st_info != symtable2 [i].u.isym->st_info
9127 || symtable1 [i].u.isym->st_other != symtable2 [i].u.isym->st_other
9128 || strcmp (symtable1 [i].name, symtable2 [i].name) != 0)
9146 /* It is only used by x86-64 so far. */
9147 asection _bfd_elf_large_com_section
9148 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
9149 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
9151 /* Return TRUE if 2 section types are compatible. */
9154 _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec,
9155 bfd *bbfd, const asection *bsec)
9159 || abfd->xvec->flavour != bfd_target_elf_flavour
9160 || bbfd->xvec->flavour != bfd_target_elf_flavour)
9163 return elf_section_type (asec) == elf_section_type (bsec);
9167 _bfd_elf_set_osabi (bfd * abfd,
9168 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
9170 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
9172 i_ehdrp = elf_elfheader (abfd);
9174 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
9178 /* Return TRUE for ELF symbol types that represent functions.
9179 This is the default version of this function, which is sufficient for
9180 most targets. It returns true if TYPE is STT_FUNC. */
9183 _bfd_elf_is_function_type (unsigned int type)
9185 return (type == STT_FUNC);