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
2911 && elf_elfheader (abfd)->e_phnum == 0)
2913 /* Don't change the header type from NOBITS if we are being
2914 called for strip/objcopy --only-keep-debug. */
2915 this_hdr->sh_type = sh_type;
2918 /* If the section has relocs, set up a section header for the
2919 SHT_REL[A] section. If two relocation sections are required for
2920 this section, it is up to the processor-specific back-end to
2921 create the other. */
2922 if ((asect->flags & SEC_RELOC) != 0
2923 && !_bfd_elf_init_reloc_shdr (abfd,
2924 &elf_section_data (asect)->rel_hdr,
2930 /* Fill in the contents of a SHT_GROUP section. */
2933 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2935 bfd_boolean *failedptr = failedptrarg;
2936 unsigned long symindx;
2937 asection *elt, *first;
2941 /* Ignore linker created group section. See elfNN_ia64_object_p in
2943 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2948 if (elf_group_id (sec) != NULL)
2949 symindx = elf_group_id (sec)->udata.i;
2953 /* If called from the assembler, swap_out_syms will have set up
2954 elf_section_syms; If called for "ld -r", use target_index. */
2955 if (elf_section_syms (abfd) != NULL)
2956 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2958 symindx = sec->target_index;
2960 elf_section_data (sec)->this_hdr.sh_info = symindx;
2962 /* The contents won't be allocated for "ld -r" or objcopy. */
2964 if (sec->contents == NULL)
2967 sec->contents = bfd_alloc (abfd, sec->size);
2969 /* Arrange for the section to be written out. */
2970 elf_section_data (sec)->this_hdr.contents = sec->contents;
2971 if (sec->contents == NULL)
2978 loc = sec->contents + sec->size;
2980 /* Get the pointer to the first section in the group that gas
2981 squirreled away here. objcopy arranges for this to be set to the
2982 start of the input section group. */
2983 first = elt = elf_next_in_group (sec);
2985 /* First element is a flag word. Rest of section is elf section
2986 indices for all the sections of the group. Write them backwards
2987 just to keep the group in the same order as given in .section
2988 directives, not that it matters. */
2997 s = s->output_section;
3000 idx = elf_section_data (s)->this_idx;
3001 H_PUT_32 (abfd, idx, loc);
3002 elt = elf_next_in_group (elt);
3007 if ((loc -= 4) != sec->contents)
3010 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
3013 /* Assign all ELF section numbers. The dummy first section is handled here
3014 too. The link/info pointers for the standard section types are filled
3015 in here too, while we're at it. */
3018 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
3020 struct elf_obj_tdata *t = elf_tdata (abfd);
3022 unsigned int section_number, secn;
3023 Elf_Internal_Shdr **i_shdrp;
3024 struct bfd_elf_section_data *d;
3028 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
3030 /* SHT_GROUP sections are in relocatable files only. */
3031 if (link_info == NULL || link_info->relocatable)
3033 /* Put SHT_GROUP sections first. */
3034 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3036 d = elf_section_data (sec);
3038 if (d->this_hdr.sh_type == SHT_GROUP)
3040 if (sec->flags & SEC_LINKER_CREATED)
3042 /* Remove the linker created SHT_GROUP sections. */
3043 bfd_section_list_remove (abfd, sec);
3044 abfd->section_count--;
3048 if (section_number == SHN_LORESERVE)
3049 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3050 d->this_idx = section_number++;
3056 for (sec = abfd->sections; sec; sec = sec->next)
3058 d = elf_section_data (sec);
3060 if (d->this_hdr.sh_type != SHT_GROUP)
3062 if (section_number == SHN_LORESERVE)
3063 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3064 d->this_idx = section_number++;
3066 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
3067 if ((sec->flags & SEC_RELOC) == 0)
3071 if (section_number == SHN_LORESERVE)
3072 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3073 d->rel_idx = section_number++;
3074 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
3079 if (section_number == SHN_LORESERVE)
3080 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3081 d->rel_idx2 = section_number++;
3082 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
3088 if (section_number == SHN_LORESERVE)
3089 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3090 t->shstrtab_section = section_number++;
3091 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
3092 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
3094 if (bfd_get_symcount (abfd) > 0)
3096 if (section_number == SHN_LORESERVE)
3097 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3098 t->symtab_section = section_number++;
3099 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
3100 if (section_number > SHN_LORESERVE - 2)
3102 if (section_number == SHN_LORESERVE)
3103 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3104 t->symtab_shndx_section = section_number++;
3105 t->symtab_shndx_hdr.sh_name
3106 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3107 ".symtab_shndx", FALSE);
3108 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
3111 if (section_number == SHN_LORESERVE)
3112 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3113 t->strtab_section = section_number++;
3114 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
3117 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
3118 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3120 elf_numsections (abfd) = section_number;
3121 elf_elfheader (abfd)->e_shnum = section_number;
3122 if (section_number > SHN_LORESERVE)
3123 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
3125 /* Set up the list of section header pointers, in agreement with the
3127 i_shdrp = bfd_zalloc2 (abfd, section_number, sizeof (Elf_Internal_Shdr *));
3128 if (i_shdrp == NULL)
3131 i_shdrp[0] = bfd_zalloc (abfd, sizeof (Elf_Internal_Shdr));
3132 if (i_shdrp[0] == NULL)
3134 bfd_release (abfd, i_shdrp);
3138 elf_elfsections (abfd) = i_shdrp;
3140 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
3141 if (bfd_get_symcount (abfd) > 0)
3143 i_shdrp[t->symtab_section] = &t->symtab_hdr;
3144 if (elf_numsections (abfd) > SHN_LORESERVE)
3146 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
3147 t->symtab_shndx_hdr.sh_link = t->symtab_section;
3149 i_shdrp[t->strtab_section] = &t->strtab_hdr;
3150 t->symtab_hdr.sh_link = t->strtab_section;
3153 for (sec = abfd->sections; sec; sec = sec->next)
3155 struct bfd_elf_section_data *d = elf_section_data (sec);
3159 i_shdrp[d->this_idx] = &d->this_hdr;
3160 if (d->rel_idx != 0)
3161 i_shdrp[d->rel_idx] = &d->rel_hdr;
3162 if (d->rel_idx2 != 0)
3163 i_shdrp[d->rel_idx2] = d->rel_hdr2;
3165 /* Fill in the sh_link and sh_info fields while we're at it. */
3167 /* sh_link of a reloc section is the section index of the symbol
3168 table. sh_info is the section index of the section to which
3169 the relocation entries apply. */
3170 if (d->rel_idx != 0)
3172 d->rel_hdr.sh_link = t->symtab_section;
3173 d->rel_hdr.sh_info = d->this_idx;
3175 if (d->rel_idx2 != 0)
3177 d->rel_hdr2->sh_link = t->symtab_section;
3178 d->rel_hdr2->sh_info = d->this_idx;
3181 /* We need to set up sh_link for SHF_LINK_ORDER. */
3182 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3184 s = elf_linked_to_section (sec);
3187 /* elf_linked_to_section points to the input section. */
3188 if (link_info != NULL)
3190 /* Check discarded linkonce section. */
3191 if (elf_discarded_section (s))
3194 (*_bfd_error_handler)
3195 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3196 abfd, d->this_hdr.bfd_section,
3198 /* Point to the kept section if it has the same
3199 size as the discarded one. */
3200 kept = _bfd_elf_check_kept_section (s, link_info);
3203 bfd_set_error (bfd_error_bad_value);
3209 s = s->output_section;
3210 BFD_ASSERT (s != NULL);
3214 /* Handle objcopy. */
3215 if (s->output_section == NULL)
3217 (*_bfd_error_handler)
3218 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
3219 abfd, d->this_hdr.bfd_section, s, s->owner);
3220 bfd_set_error (bfd_error_bad_value);
3223 s = s->output_section;
3225 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3230 The Intel C compiler generates SHT_IA_64_UNWIND with
3231 SHF_LINK_ORDER. But it doesn't set the sh_link or
3232 sh_info fields. Hence we could get the situation
3234 const struct elf_backend_data *bed
3235 = get_elf_backend_data (abfd);
3236 if (bed->link_order_error_handler)
3237 bed->link_order_error_handler
3238 (_("%B: warning: sh_link not set for section `%A'"),
3243 switch (d->this_hdr.sh_type)
3247 /* A reloc section which we are treating as a normal BFD
3248 section. sh_link is the section index of the symbol
3249 table. sh_info is the section index of the section to
3250 which the relocation entries apply. We assume that an
3251 allocated reloc section uses the dynamic symbol table.
3252 FIXME: How can we be sure? */
3253 s = bfd_get_section_by_name (abfd, ".dynsym");
3255 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3257 /* We look up the section the relocs apply to by name. */
3259 if (d->this_hdr.sh_type == SHT_REL)
3263 s = bfd_get_section_by_name (abfd, name);
3265 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3269 /* We assume that a section named .stab*str is a stabs
3270 string section. We look for a section with the same name
3271 but without the trailing ``str'', and set its sh_link
3272 field to point to this section. */
3273 if (CONST_STRNEQ (sec->name, ".stab")
3274 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3279 len = strlen (sec->name);
3280 alc = bfd_malloc (len - 2);
3283 memcpy (alc, sec->name, len - 3);
3284 alc[len - 3] = '\0';
3285 s = bfd_get_section_by_name (abfd, alc);
3289 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3291 /* This is a .stab section. */
3292 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3293 elf_section_data (s)->this_hdr.sh_entsize
3294 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3301 case SHT_GNU_verneed:
3302 case SHT_GNU_verdef:
3303 /* sh_link is the section header index of the string table
3304 used for the dynamic entries, or the symbol table, or the
3306 s = bfd_get_section_by_name (abfd, ".dynstr");
3308 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3311 case SHT_GNU_LIBLIST:
3312 /* sh_link is the section header index of the prelink library
3314 used for the dynamic entries, or the symbol table, or the
3316 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3317 ? ".dynstr" : ".gnu.libstr");
3319 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3324 case SHT_GNU_versym:
3325 /* sh_link is the section header index of the symbol table
3326 this hash table or version table is for. */
3327 s = bfd_get_section_by_name (abfd, ".dynsym");
3329 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3333 d->this_hdr.sh_link = t->symtab_section;
3337 for (secn = 1; secn < section_number; ++secn)
3338 if (i_shdrp[secn] == NULL)
3339 i_shdrp[secn] = i_shdrp[0];
3341 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3342 i_shdrp[secn]->sh_name);
3346 /* Map symbol from it's internal number to the external number, moving
3347 all local symbols to be at the head of the list. */
3350 sym_is_global (bfd *abfd, asymbol *sym)
3352 /* If the backend has a special mapping, use it. */
3353 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3354 if (bed->elf_backend_sym_is_global)
3355 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3357 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3358 || bfd_is_und_section (bfd_get_section (sym))
3359 || bfd_is_com_section (bfd_get_section (sym)));
3362 /* Don't output section symbols for sections that are not going to be
3363 output. Also, don't output section symbols for reloc and other
3364 special sections. */
3367 ignore_section_sym (bfd *abfd, asymbol *sym)
3369 return ((sym->flags & BSF_SECTION_SYM) != 0
3371 || (sym->section->owner != abfd
3372 && (sym->section->output_section->owner != abfd
3373 || sym->section->output_offset != 0))));
3377 elf_map_symbols (bfd *abfd)
3379 unsigned int symcount = bfd_get_symcount (abfd);
3380 asymbol **syms = bfd_get_outsymbols (abfd);
3381 asymbol **sect_syms;
3382 unsigned int num_locals = 0;
3383 unsigned int num_globals = 0;
3384 unsigned int num_locals2 = 0;
3385 unsigned int num_globals2 = 0;
3392 fprintf (stderr, "elf_map_symbols\n");
3396 for (asect = abfd->sections; asect; asect = asect->next)
3398 if (max_index < asect->index)
3399 max_index = asect->index;
3403 sect_syms = bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3404 if (sect_syms == NULL)
3406 elf_section_syms (abfd) = sect_syms;
3407 elf_num_section_syms (abfd) = max_index;
3409 /* Init sect_syms entries for any section symbols we have already
3410 decided to output. */
3411 for (idx = 0; idx < symcount; idx++)
3413 asymbol *sym = syms[idx];
3415 if ((sym->flags & BSF_SECTION_SYM) != 0
3416 && !ignore_section_sym (abfd, sym))
3418 asection *sec = sym->section;
3420 if (sec->owner != abfd)
3421 sec = sec->output_section;
3423 sect_syms[sec->index] = syms[idx];
3427 /* Classify all of the symbols. */
3428 for (idx = 0; idx < symcount; idx++)
3430 if (ignore_section_sym (abfd, syms[idx]))
3432 if (!sym_is_global (abfd, syms[idx]))
3438 /* We will be adding a section symbol for each normal BFD section. Most
3439 sections will already have a section symbol in outsymbols, but
3440 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3441 at least in that case. */
3442 for (asect = abfd->sections; asect; asect = asect->next)
3444 if (sect_syms[asect->index] == NULL)
3446 if (!sym_is_global (abfd, asect->symbol))
3453 /* Now sort the symbols so the local symbols are first. */
3454 new_syms = bfd_alloc2 (abfd, num_locals + num_globals, sizeof (asymbol *));
3456 if (new_syms == NULL)
3459 for (idx = 0; idx < symcount; idx++)
3461 asymbol *sym = syms[idx];
3464 if (ignore_section_sym (abfd, sym))
3466 if (!sym_is_global (abfd, sym))
3469 i = num_locals + num_globals2++;
3471 sym->udata.i = i + 1;
3473 for (asect = abfd->sections; asect; asect = asect->next)
3475 if (sect_syms[asect->index] == NULL)
3477 asymbol *sym = asect->symbol;
3480 sect_syms[asect->index] = sym;
3481 if (!sym_is_global (abfd, sym))
3484 i = num_locals + num_globals2++;
3486 sym->udata.i = i + 1;
3490 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3492 elf_num_locals (abfd) = num_locals;
3493 elf_num_globals (abfd) = num_globals;
3497 /* Align to the maximum file alignment that could be required for any
3498 ELF data structure. */
3500 static inline file_ptr
3501 align_file_position (file_ptr off, int align)
3503 return (off + align - 1) & ~(align - 1);
3506 /* Assign a file position to a section, optionally aligning to the
3507 required section alignment. */
3510 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3518 al = i_shdrp->sh_addralign;
3520 offset = BFD_ALIGN (offset, al);
3522 i_shdrp->sh_offset = offset;
3523 if (i_shdrp->bfd_section != NULL)
3524 i_shdrp->bfd_section->filepos = offset;
3525 if (i_shdrp->sh_type != SHT_NOBITS)
3526 offset += i_shdrp->sh_size;
3530 /* Compute the file positions we are going to put the sections at, and
3531 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3532 is not NULL, this is being called by the ELF backend linker. */
3535 _bfd_elf_compute_section_file_positions (bfd *abfd,
3536 struct bfd_link_info *link_info)
3538 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3540 struct bfd_strtab_hash *strtab = NULL;
3541 Elf_Internal_Shdr *shstrtab_hdr;
3543 if (abfd->output_has_begun)
3546 /* Do any elf backend specific processing first. */
3547 if (bed->elf_backend_begin_write_processing)
3548 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3550 if (! prep_headers (abfd))
3553 /* Post process the headers if necessary. */
3554 if (bed->elf_backend_post_process_headers)
3555 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3558 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3562 if (!assign_section_numbers (abfd, link_info))
3565 /* The backend linker builds symbol table information itself. */
3566 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3568 /* Non-zero if doing a relocatable link. */
3569 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3571 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3575 if (link_info == NULL)
3577 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3582 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3583 /* sh_name was set in prep_headers. */
3584 shstrtab_hdr->sh_type = SHT_STRTAB;
3585 shstrtab_hdr->sh_flags = 0;
3586 shstrtab_hdr->sh_addr = 0;
3587 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3588 shstrtab_hdr->sh_entsize = 0;
3589 shstrtab_hdr->sh_link = 0;
3590 shstrtab_hdr->sh_info = 0;
3591 /* sh_offset is set in assign_file_positions_except_relocs. */
3592 shstrtab_hdr->sh_addralign = 1;
3594 if (!assign_file_positions_except_relocs (abfd, link_info))
3597 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3600 Elf_Internal_Shdr *hdr;
3602 off = elf_tdata (abfd)->next_file_pos;
3604 hdr = &elf_tdata (abfd)->symtab_hdr;
3605 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3607 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3608 if (hdr->sh_size != 0)
3609 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3611 hdr = &elf_tdata (abfd)->strtab_hdr;
3612 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3614 elf_tdata (abfd)->next_file_pos = off;
3616 /* Now that we know where the .strtab section goes, write it
3618 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3619 || ! _bfd_stringtab_emit (abfd, strtab))
3621 _bfd_stringtab_free (strtab);
3624 abfd->output_has_begun = TRUE;
3629 /* Make an initial estimate of the size of the program header. If we
3630 get the number wrong here, we'll redo section placement. */
3632 static bfd_size_type
3633 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3637 const struct elf_backend_data *bed;
3639 /* Assume we will need exactly two PT_LOAD segments: one for text
3640 and one for data. */
3643 s = bfd_get_section_by_name (abfd, ".interp");
3644 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3646 /* If we have a loadable interpreter section, we need a
3647 PT_INTERP segment. In this case, assume we also need a
3648 PT_PHDR segment, although that may not be true for all
3653 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3655 /* We need a PT_DYNAMIC segment. */
3658 if (elf_tdata (abfd)->relro)
3660 /* We need a PT_GNU_RELRO segment only when there is a
3661 PT_DYNAMIC segment. */
3666 if (elf_tdata (abfd)->eh_frame_hdr)
3668 /* We need a PT_GNU_EH_FRAME segment. */
3672 if (elf_tdata (abfd)->stack_flags)
3674 /* We need a PT_GNU_STACK segment. */
3678 for (s = abfd->sections; s != NULL; s = s->next)
3680 if ((s->flags & SEC_LOAD) != 0
3681 && CONST_STRNEQ (s->name, ".note"))
3683 /* We need a PT_NOTE segment. */
3688 for (s = abfd->sections; s != NULL; s = s->next)
3690 if (s->flags & SEC_THREAD_LOCAL)
3692 /* We need a PT_TLS segment. */
3698 /* Let the backend count up any program headers it might need. */
3699 bed = get_elf_backend_data (abfd);
3700 if (bed->elf_backend_additional_program_headers)
3704 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3710 return segs * bed->s->sizeof_phdr;
3713 /* Create a mapping from a set of sections to a program segment. */
3715 static struct elf_segment_map *
3716 make_mapping (bfd *abfd,
3717 asection **sections,
3722 struct elf_segment_map *m;
3727 amt = sizeof (struct elf_segment_map);
3728 amt += (to - from - 1) * sizeof (asection *);
3729 m = bfd_zalloc (abfd, amt);
3733 m->p_type = PT_LOAD;
3734 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3735 m->sections[i - from] = *hdrpp;
3736 m->count = to - from;
3738 if (from == 0 && phdr)
3740 /* Include the headers in the first PT_LOAD segment. */
3741 m->includes_filehdr = 1;
3742 m->includes_phdrs = 1;
3748 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3751 struct elf_segment_map *
3752 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3754 struct elf_segment_map *m;
3756 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3760 m->p_type = PT_DYNAMIC;
3762 m->sections[0] = dynsec;
3767 /* Possibly add or remove segments from the segment map. */
3770 elf_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
3772 struct elf_segment_map **m;
3773 const struct elf_backend_data *bed;
3775 /* The placement algorithm assumes that non allocated sections are
3776 not in PT_LOAD segments. We ensure this here by removing such
3777 sections from the segment map. We also remove excluded
3778 sections. Finally, any PT_LOAD segment without sections is
3780 m = &elf_tdata (abfd)->segment_map;
3783 unsigned int i, new_count;
3785 for (new_count = 0, i = 0; i < (*m)->count; i++)
3787 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3788 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3789 || (*m)->p_type != PT_LOAD))
3791 (*m)->sections[new_count] = (*m)->sections[i];
3795 (*m)->count = new_count;
3797 if ((*m)->p_type == PT_LOAD && (*m)->count == 0)
3803 bed = get_elf_backend_data (abfd);
3804 if (bed->elf_backend_modify_segment_map != NULL)
3806 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3813 /* Set up a mapping from BFD sections to program segments. */
3816 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3819 struct elf_segment_map *m;
3820 asection **sections = NULL;
3821 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3823 if (elf_tdata (abfd)->segment_map == NULL
3824 && bfd_count_sections (abfd) != 0)
3828 struct elf_segment_map *mfirst;
3829 struct elf_segment_map **pm;
3832 unsigned int phdr_index;
3833 bfd_vma maxpagesize;
3835 bfd_boolean phdr_in_segment = TRUE;
3836 bfd_boolean writable;
3838 asection *first_tls = NULL;
3839 asection *dynsec, *eh_frame_hdr;
3842 /* Select the allocated sections, and sort them. */
3844 sections = bfd_malloc2 (bfd_count_sections (abfd), sizeof (asection *));
3845 if (sections == NULL)
3849 for (s = abfd->sections; s != NULL; s = s->next)
3851 if ((s->flags & SEC_ALLOC) != 0)
3857 BFD_ASSERT (i <= bfd_count_sections (abfd));
3860 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3862 /* Build the mapping. */
3867 /* If we have a .interp section, then create a PT_PHDR segment for
3868 the program headers and a PT_INTERP segment for the .interp
3870 s = bfd_get_section_by_name (abfd, ".interp");
3871 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3873 amt = sizeof (struct elf_segment_map);
3874 m = bfd_zalloc (abfd, amt);
3878 m->p_type = PT_PHDR;
3879 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3880 m->p_flags = PF_R | PF_X;
3881 m->p_flags_valid = 1;
3882 m->includes_phdrs = 1;
3887 amt = sizeof (struct elf_segment_map);
3888 m = bfd_zalloc (abfd, amt);
3892 m->p_type = PT_INTERP;
3900 /* Look through the sections. We put sections in the same program
3901 segment when the start of the second section can be placed within
3902 a few bytes of the end of the first section. */
3906 maxpagesize = bed->maxpagesize;
3908 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3910 && (dynsec->flags & SEC_LOAD) == 0)
3913 /* Deal with -Ttext or something similar such that the first section
3914 is not adjacent to the program headers. This is an
3915 approximation, since at this point we don't know exactly how many
3916 program headers we will need. */
3919 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
3921 if (phdr_size == (bfd_size_type) -1)
3922 phdr_size = get_program_header_size (abfd, info);
3923 if ((abfd->flags & D_PAGED) == 0
3924 || sections[0]->lma < phdr_size
3925 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3926 phdr_in_segment = FALSE;
3929 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3932 bfd_boolean new_segment;
3936 /* See if this section and the last one will fit in the same
3939 if (last_hdr == NULL)
3941 /* If we don't have a segment yet, then we don't need a new
3942 one (we build the last one after this loop). */
3943 new_segment = FALSE;
3945 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3947 /* If this section has a different relation between the
3948 virtual address and the load address, then we need a new
3952 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3953 < BFD_ALIGN (hdr->lma, maxpagesize))
3955 /* If putting this section in this segment would force us to
3956 skip a page in the segment, then we need a new segment. */
3959 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3960 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3962 /* We don't want to put a loadable section after a
3963 nonloadable section in the same segment.
3964 Consider .tbss sections as loadable for this purpose. */
3967 else if ((abfd->flags & D_PAGED) == 0)
3969 /* If the file is not demand paged, which means that we
3970 don't require the sections to be correctly aligned in the
3971 file, then there is no other reason for a new segment. */
3972 new_segment = FALSE;
3975 && (hdr->flags & SEC_READONLY) == 0
3976 && (((last_hdr->lma + last_size - 1)
3977 & ~(maxpagesize - 1))
3978 != (hdr->lma & ~(maxpagesize - 1))))
3980 /* We don't want to put a writable section in a read only
3981 segment, unless they are on the same page in memory
3982 anyhow. We already know that the last section does not
3983 bring us past the current section on the page, so the
3984 only case in which the new section is not on the same
3985 page as the previous section is when the previous section
3986 ends precisely on a page boundary. */
3991 /* Otherwise, we can use the same segment. */
3992 new_segment = FALSE;
3995 /* Allow interested parties a chance to override our decision. */
3996 if (last_hdr && info->callbacks->override_segment_assignment)
3997 new_segment = info->callbacks->override_segment_assignment (info, abfd, hdr, last_hdr, new_segment);
4001 if ((hdr->flags & SEC_READONLY) == 0)
4004 /* .tbss sections effectively have zero size. */
4005 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4006 != SEC_THREAD_LOCAL)
4007 last_size = hdr->size;
4013 /* We need a new program segment. We must create a new program
4014 header holding all the sections from phdr_index until hdr. */
4016 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4023 if ((hdr->flags & SEC_READONLY) == 0)
4029 /* .tbss sections effectively have zero size. */
4030 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
4031 last_size = hdr->size;
4035 phdr_in_segment = FALSE;
4038 /* Create a final PT_LOAD program segment. */
4039 if (last_hdr != NULL)
4041 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4049 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
4052 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
4059 /* For each loadable .note section, add a PT_NOTE segment. We don't
4060 use bfd_get_section_by_name, because if we link together
4061 nonloadable .note sections and loadable .note sections, we will
4062 generate two .note sections in the output file. FIXME: Using
4063 names for section types is bogus anyhow. */
4064 for (s = abfd->sections; s != NULL; s = s->next)
4066 if ((s->flags & SEC_LOAD) != 0
4067 && CONST_STRNEQ (s->name, ".note"))
4069 amt = sizeof (struct elf_segment_map);
4070 m = bfd_zalloc (abfd, amt);
4074 m->p_type = PT_NOTE;
4081 if (s->flags & SEC_THREAD_LOCAL)
4089 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
4094 amt = sizeof (struct elf_segment_map);
4095 amt += (tls_count - 1) * sizeof (asection *);
4096 m = bfd_zalloc (abfd, amt);
4101 m->count = tls_count;
4102 /* Mandated PF_R. */
4104 m->p_flags_valid = 1;
4105 for (i = 0; i < tls_count; ++i)
4107 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
4108 m->sections[i] = first_tls;
4109 first_tls = first_tls->next;
4116 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
4118 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
4119 if (eh_frame_hdr != NULL
4120 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
4122 amt = sizeof (struct elf_segment_map);
4123 m = bfd_zalloc (abfd, amt);
4127 m->p_type = PT_GNU_EH_FRAME;
4129 m->sections[0] = eh_frame_hdr->output_section;
4135 if (elf_tdata (abfd)->stack_flags)
4137 amt = sizeof (struct elf_segment_map);
4138 m = bfd_zalloc (abfd, amt);
4142 m->p_type = PT_GNU_STACK;
4143 m->p_flags = elf_tdata (abfd)->stack_flags;
4144 m->p_flags_valid = 1;
4150 if (dynsec != NULL && elf_tdata (abfd)->relro)
4152 /* We make a PT_GNU_RELRO segment only when there is a
4153 PT_DYNAMIC segment. */
4154 amt = sizeof (struct elf_segment_map);
4155 m = bfd_zalloc (abfd, amt);
4159 m->p_type = PT_GNU_RELRO;
4161 m->p_flags_valid = 1;
4168 elf_tdata (abfd)->segment_map = mfirst;
4171 if (!elf_modify_segment_map (abfd, info))
4174 for (count = 0, m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4176 elf_tdata (abfd)->program_header_size = count * bed->s->sizeof_phdr;
4181 if (sections != NULL)
4186 /* Sort sections by address. */
4189 elf_sort_sections (const void *arg1, const void *arg2)
4191 const asection *sec1 = *(const asection **) arg1;
4192 const asection *sec2 = *(const asection **) arg2;
4193 bfd_size_type size1, size2;
4195 /* Sort by LMA first, since this is the address used to
4196 place the section into a segment. */
4197 if (sec1->lma < sec2->lma)
4199 else if (sec1->lma > sec2->lma)
4202 /* Then sort by VMA. Normally the LMA and the VMA will be
4203 the same, and this will do nothing. */
4204 if (sec1->vma < sec2->vma)
4206 else if (sec1->vma > sec2->vma)
4209 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
4211 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
4217 /* If the indicies are the same, do not return 0
4218 here, but continue to try the next comparison. */
4219 if (sec1->target_index - sec2->target_index != 0)
4220 return sec1->target_index - sec2->target_index;
4225 else if (TOEND (sec2))
4230 /* Sort by size, to put zero sized sections
4231 before others at the same address. */
4233 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
4234 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
4241 return sec1->target_index - sec2->target_index;
4244 /* Ian Lance Taylor writes:
4246 We shouldn't be using % with a negative signed number. That's just
4247 not good. We have to make sure either that the number is not
4248 negative, or that the number has an unsigned type. When the types
4249 are all the same size they wind up as unsigned. When file_ptr is a
4250 larger signed type, the arithmetic winds up as signed long long,
4253 What we're trying to say here is something like ``increase OFF by
4254 the least amount that will cause it to be equal to the VMA modulo
4256 /* In other words, something like:
4258 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4259 off_offset = off % bed->maxpagesize;
4260 if (vma_offset < off_offset)
4261 adjustment = vma_offset + bed->maxpagesize - off_offset;
4263 adjustment = vma_offset - off_offset;
4265 which can can be collapsed into the expression below. */
4268 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4270 return ((vma - off) % maxpagesize);
4273 /* Assign file positions to the sections based on the mapping from
4274 sections to segments. This function also sets up some fields in
4278 assign_file_positions_for_load_sections (bfd *abfd,
4279 struct bfd_link_info *link_info)
4281 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4282 struct elf_segment_map *m;
4283 Elf_Internal_Phdr *phdrs;
4284 Elf_Internal_Phdr *p;
4286 bfd_size_type maxpagesize;
4290 if (link_info == NULL
4291 && !elf_modify_segment_map (abfd, link_info))
4295 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4298 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4299 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4300 elf_elfheader (abfd)->e_phnum = alloc;
4302 if (elf_tdata (abfd)->program_header_size == (bfd_size_type) -1)
4303 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4305 BFD_ASSERT (elf_tdata (abfd)->program_header_size
4306 >= alloc * bed->s->sizeof_phdr);
4310 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4314 phdrs = bfd_alloc2 (abfd, alloc, sizeof (Elf_Internal_Phdr));
4315 elf_tdata (abfd)->phdr = phdrs;
4320 if ((abfd->flags & D_PAGED) != 0)
4321 maxpagesize = bed->maxpagesize;
4323 off = bed->s->sizeof_ehdr;
4324 off += alloc * bed->s->sizeof_phdr;
4326 for (m = elf_tdata (abfd)->segment_map, p = phdrs, j = 0;
4328 m = m->next, p++, j++)
4332 /* If elf_segment_map is not from map_sections_to_segments, the
4333 sections may not be correctly ordered. NOTE: sorting should
4334 not be done to the PT_NOTE section of a corefile, which may
4335 contain several pseudo-sections artificially created by bfd.
4336 Sorting these pseudo-sections breaks things badly. */
4338 && !(elf_elfheader (abfd)->e_type == ET_CORE
4339 && m->p_type == PT_NOTE))
4340 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4343 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4344 number of sections with contents contributing to both p_filesz
4345 and p_memsz, followed by a number of sections with no contents
4346 that just contribute to p_memsz. In this loop, OFF tracks next
4347 available file offset for PT_LOAD and PT_NOTE segments. */
4348 p->p_type = m->p_type;
4349 p->p_flags = m->p_flags;
4354 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4356 if (m->p_paddr_valid)
4357 p->p_paddr = m->p_paddr;
4358 else if (m->count == 0)
4361 p->p_paddr = m->sections[0]->lma;
4363 if (p->p_type == PT_LOAD
4364 && (abfd->flags & D_PAGED) != 0)
4366 /* p_align in demand paged PT_LOAD segments effectively stores
4367 the maximum page size. When copying an executable with
4368 objcopy, we set m->p_align from the input file. Use this
4369 value for maxpagesize rather than bed->maxpagesize, which
4370 may be different. Note that we use maxpagesize for PT_TLS
4371 segment alignment later in this function, so we are relying
4372 on at least one PT_LOAD segment appearing before a PT_TLS
4374 if (m->p_align_valid)
4375 maxpagesize = m->p_align;
4377 p->p_align = maxpagesize;
4379 else if (m->count == 0)
4380 p->p_align = 1 << bed->s->log_file_align;
4381 else if (m->p_align_valid)
4382 p->p_align = m->p_align;
4386 if (p->p_type == PT_LOAD
4389 bfd_size_type align;
4391 unsigned int align_power = 0;
4393 if (m->p_align_valid)
4397 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4399 unsigned int secalign;
4401 secalign = bfd_get_section_alignment (abfd, *secpp);
4402 if (secalign > align_power)
4403 align_power = secalign;
4405 align = (bfd_size_type) 1 << align_power;
4406 if (align < maxpagesize)
4407 align = maxpagesize;
4410 for (i = 0; i < m->count; i++)
4411 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4412 /* If we aren't making room for this section, then
4413 it must be SHT_NOBITS regardless of what we've
4414 set via struct bfd_elf_special_section. */
4415 elf_section_type (m->sections[i]) = SHT_NOBITS;
4417 adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4420 /* If the first section isn't loadable, the same holds
4421 for any other sections. We don't need to align the
4422 segment on disk since the segment doesn't need file
4425 while (elf_section_type (m->sections[i]) == SHT_NOBITS)
4427 /* If a segment starts with .tbss, we need to look
4428 at the next section to decide whether the segment
4429 has any loadable sections. */
4430 if ((elf_section_flags (m->sections[i]) & SHF_TLS) == 0
4440 /* Make sure the .dynamic section is the first section in the
4441 PT_DYNAMIC segment. */
4442 else if (p->p_type == PT_DYNAMIC
4444 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4447 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4449 bfd_set_error (bfd_error_bad_value);
4457 if (m->includes_filehdr)
4459 if (! m->p_flags_valid)
4461 p->p_filesz = bed->s->sizeof_ehdr;
4462 p->p_memsz = bed->s->sizeof_ehdr;
4465 BFD_ASSERT (p->p_type == PT_LOAD);
4467 if (p->p_vaddr < (bfd_vma) off)
4469 (*_bfd_error_handler)
4470 (_("%B: Not enough room for program headers, try linking with -N"),
4472 bfd_set_error (bfd_error_bad_value);
4477 if (! m->p_paddr_valid)
4482 if (m->includes_phdrs)
4484 if (! m->p_flags_valid)
4487 if (!m->includes_filehdr)
4489 p->p_offset = bed->s->sizeof_ehdr;
4493 BFD_ASSERT (p->p_type == PT_LOAD);
4494 p->p_vaddr -= off - p->p_offset;
4495 if (! m->p_paddr_valid)
4496 p->p_paddr -= off - p->p_offset;
4500 p->p_filesz += alloc * bed->s->sizeof_phdr;
4501 p->p_memsz += alloc * bed->s->sizeof_phdr;
4504 if (p->p_type == PT_LOAD
4505 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4507 if (! m->includes_filehdr && ! m->includes_phdrs)
4513 adjust = off - (p->p_offset + p->p_filesz);
4514 p->p_filesz += adjust;
4515 p->p_memsz += adjust;
4519 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4520 maps. Set filepos for sections in PT_LOAD segments, and in
4521 core files, for sections in PT_NOTE segments.
4522 assign_file_positions_for_non_load_sections will set filepos
4523 for other sections and update p_filesz for other segments. */
4524 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4527 bfd_size_type align;
4528 Elf_Internal_Shdr *this_hdr;
4531 this_hdr = &elf_section_data (sec)->this_hdr;
4532 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4534 if (p->p_type == PT_LOAD
4535 || p->p_type == PT_TLS)
4537 bfd_signed_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
4539 if (this_hdr->sh_type != SHT_NOBITS
4540 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4541 && ((this_hdr->sh_flags & SHF_TLS) == 0
4542 || p->p_type == PT_TLS)))
4546 (*_bfd_error_handler)
4547 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4548 abfd, sec, (unsigned long) sec->lma);
4551 p->p_memsz += adjust;
4553 if (this_hdr->sh_type != SHT_NOBITS)
4556 p->p_filesz += adjust;
4561 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4563 /* The section at i == 0 is the one that actually contains
4567 this_hdr->sh_offset = sec->filepos = off;
4569 p->p_filesz = sec->size;
4575 /* The rest are fake sections that shouldn't be written. */
4584 if (p->p_type == PT_LOAD)
4586 this_hdr->sh_offset = sec->filepos = off;
4587 if (this_hdr->sh_type != SHT_NOBITS)
4591 if (this_hdr->sh_type != SHT_NOBITS)
4593 p->p_filesz += sec->size;
4594 /* A load section without SHF_ALLOC is something like
4595 a note section in a PT_NOTE segment. These take
4596 file space but are not loaded into memory. */
4597 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4598 p->p_memsz += sec->size;
4601 /* .tbss is special. It doesn't contribute to p_memsz of
4603 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0
4604 && ((this_hdr->sh_flags & SHF_TLS) == 0
4605 || p->p_type == PT_TLS))
4606 p->p_memsz += sec->size;
4608 if (p->p_type == PT_TLS
4610 && (sec->flags & SEC_HAS_CONTENTS) == 0)
4612 struct bfd_link_order *o = sec->map_tail.link_order;
4614 p->p_memsz += o->offset + o->size;
4617 if (p->p_type == PT_GNU_RELRO)
4619 else if (align > p->p_align
4620 && !m->p_align_valid
4621 && (p->p_type != PT_LOAD
4622 || (abfd->flags & D_PAGED) == 0))
4626 if (! m->p_flags_valid)
4629 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4631 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4636 /* Check that all sections are in a PT_LOAD segment.
4637 Don't check funky gdb generated core files. */
4638 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4639 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4641 Elf_Internal_Shdr *this_hdr;
4645 this_hdr = &(elf_section_data(sec)->this_hdr);
4646 if (this_hdr->sh_size != 0
4647 && !ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, p))
4649 (*_bfd_error_handler)
4650 (_("%B: section `%A' can't be allocated in segment %d"),
4652 bfd_set_error (bfd_error_bad_value);
4658 elf_tdata (abfd)->next_file_pos = off;
4662 /* Assign file positions for the other sections. */
4665 assign_file_positions_for_non_load_sections (bfd *abfd,
4666 struct bfd_link_info *link_info)
4668 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4669 Elf_Internal_Shdr **i_shdrpp;
4670 Elf_Internal_Shdr **hdrpp;
4671 Elf_Internal_Phdr *phdrs;
4672 Elf_Internal_Phdr *p;
4673 struct elf_segment_map *m;
4674 bfd_vma filehdr_vaddr, filehdr_paddr;
4675 bfd_vma phdrs_vaddr, phdrs_paddr;
4677 unsigned int num_sec;
4681 i_shdrpp = elf_elfsections (abfd);
4682 num_sec = elf_numsections (abfd);
4683 off = elf_tdata (abfd)->next_file_pos;
4684 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4686 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4687 Elf_Internal_Shdr *hdr;
4690 if (hdr->bfd_section != NULL
4691 && (hdr->bfd_section->filepos != 0
4692 || (hdr->sh_type == SHT_NOBITS
4693 && hdr->contents == NULL)))
4694 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
4695 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4697 if (hdr->sh_size != 0)
4698 ((*_bfd_error_handler)
4699 (_("%B: warning: allocated section `%s' not in segment"),
4701 (hdr->bfd_section == NULL
4703 : hdr->bfd_section->name)));
4704 /* We don't need to page align empty sections. */
4705 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
4706 off += vma_page_aligned_bias (hdr->sh_addr, off,
4709 off += vma_page_aligned_bias (hdr->sh_addr, off,
4711 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4714 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4715 && hdr->bfd_section == NULL)
4716 || hdr == i_shdrpp[tdata->symtab_section]
4717 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4718 || hdr == i_shdrpp[tdata->strtab_section])
4719 hdr->sh_offset = -1;
4721 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4723 if (i == SHN_LORESERVE - 1)
4725 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4726 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4730 /* Now that we have set the section file positions, we can set up
4731 the file positions for the non PT_LOAD segments. */
4735 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4737 phdrs = elf_tdata (abfd)->phdr;
4738 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4743 if (p->p_type != PT_LOAD)
4746 if (m->includes_filehdr)
4748 filehdr_vaddr = p->p_vaddr;
4749 filehdr_paddr = p->p_paddr;
4751 if (m->includes_phdrs)
4753 phdrs_vaddr = p->p_vaddr;
4754 phdrs_paddr = p->p_paddr;
4755 if (m->includes_filehdr)
4757 phdrs_vaddr += bed->s->sizeof_ehdr;
4758 phdrs_paddr += bed->s->sizeof_ehdr;
4763 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4769 if (p->p_type != PT_LOAD
4770 && (p->p_type != PT_NOTE || bfd_get_format (abfd) != bfd_core))
4772 Elf_Internal_Shdr *hdr;
4773 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4775 hdr = &elf_section_data (m->sections[m->count - 1])->this_hdr;
4776 p->p_filesz = (m->sections[m->count - 1]->filepos
4777 - m->sections[0]->filepos);
4778 if (hdr->sh_type != SHT_NOBITS)
4779 p->p_filesz += hdr->sh_size;
4781 p->p_offset = m->sections[0]->filepos;
4786 if (m->includes_filehdr)
4788 p->p_vaddr = filehdr_vaddr;
4789 if (! m->p_paddr_valid)
4790 p->p_paddr = filehdr_paddr;
4792 else if (m->includes_phdrs)
4794 p->p_vaddr = phdrs_vaddr;
4795 if (! m->p_paddr_valid)
4796 p->p_paddr = phdrs_paddr;
4798 else if (p->p_type == PT_GNU_RELRO)
4800 Elf_Internal_Phdr *lp;
4802 for (lp = phdrs; lp < phdrs + count; ++lp)
4804 if (lp->p_type == PT_LOAD
4805 && lp->p_vaddr <= link_info->relro_end
4806 && lp->p_vaddr >= link_info->relro_start
4807 && (lp->p_vaddr + lp->p_filesz
4808 >= link_info->relro_end))
4812 if (lp < phdrs + count
4813 && link_info->relro_end > lp->p_vaddr)
4815 p->p_vaddr = lp->p_vaddr;
4816 p->p_paddr = lp->p_paddr;
4817 p->p_offset = lp->p_offset;
4818 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4819 p->p_memsz = p->p_filesz;
4821 p->p_flags = (lp->p_flags & ~PF_W);
4825 memset (p, 0, sizeof *p);
4826 p->p_type = PT_NULL;
4832 elf_tdata (abfd)->next_file_pos = off;
4837 /* Work out the file positions of all the sections. This is called by
4838 _bfd_elf_compute_section_file_positions. All the section sizes and
4839 VMAs must be known before this is called.
4841 Reloc sections come in two flavours: Those processed specially as
4842 "side-channel" data attached to a section to which they apply, and
4843 those that bfd doesn't process as relocations. The latter sort are
4844 stored in a normal bfd section by bfd_section_from_shdr. We don't
4845 consider the former sort here, unless they form part of the loadable
4846 image. Reloc sections not assigned here will be handled later by
4847 assign_file_positions_for_relocs.
4849 We also don't set the positions of the .symtab and .strtab here. */
4852 assign_file_positions_except_relocs (bfd *abfd,
4853 struct bfd_link_info *link_info)
4855 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4856 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4858 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4860 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4861 && bfd_get_format (abfd) != bfd_core)
4863 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4864 unsigned int num_sec = elf_numsections (abfd);
4865 Elf_Internal_Shdr **hdrpp;
4868 /* Start after the ELF header. */
4869 off = i_ehdrp->e_ehsize;
4871 /* We are not creating an executable, which means that we are
4872 not creating a program header, and that the actual order of
4873 the sections in the file is unimportant. */
4874 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4876 Elf_Internal_Shdr *hdr;
4879 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4880 && hdr->bfd_section == NULL)
4881 || i == tdata->symtab_section
4882 || i == tdata->symtab_shndx_section
4883 || i == tdata->strtab_section)
4885 hdr->sh_offset = -1;
4888 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4890 if (i == SHN_LORESERVE - 1)
4892 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4893 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4901 /* Assign file positions for the loaded sections based on the
4902 assignment of sections to segments. */
4903 if (!assign_file_positions_for_load_sections (abfd, link_info))
4906 /* And for non-load sections. */
4907 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
4910 if (bed->elf_backend_modify_program_headers != NULL)
4912 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
4916 /* Write out the program headers. */
4917 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
4918 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4919 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
4922 off = tdata->next_file_pos;
4925 /* Place the section headers. */
4926 off = align_file_position (off, 1 << bed->s->log_file_align);
4927 i_ehdrp->e_shoff = off;
4928 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4930 tdata->next_file_pos = off;
4936 prep_headers (bfd *abfd)
4938 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4939 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4940 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4941 struct elf_strtab_hash *shstrtab;
4942 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4944 i_ehdrp = elf_elfheader (abfd);
4945 i_shdrp = elf_elfsections (abfd);
4947 shstrtab = _bfd_elf_strtab_init ();
4948 if (shstrtab == NULL)
4951 elf_shstrtab (abfd) = shstrtab;
4953 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4954 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4955 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4956 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4958 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4959 i_ehdrp->e_ident[EI_DATA] =
4960 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4961 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4963 if ((abfd->flags & DYNAMIC) != 0)
4964 i_ehdrp->e_type = ET_DYN;
4965 else if ((abfd->flags & EXEC_P) != 0)
4966 i_ehdrp->e_type = ET_EXEC;
4967 else if (bfd_get_format (abfd) == bfd_core)
4968 i_ehdrp->e_type = ET_CORE;
4970 i_ehdrp->e_type = ET_REL;
4972 switch (bfd_get_arch (abfd))
4974 case bfd_arch_unknown:
4975 i_ehdrp->e_machine = EM_NONE;
4978 /* There used to be a long list of cases here, each one setting
4979 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4980 in the corresponding bfd definition. To avoid duplication,
4981 the switch was removed. Machines that need special handling
4982 can generally do it in elf_backend_final_write_processing(),
4983 unless they need the information earlier than the final write.
4984 Such need can generally be supplied by replacing the tests for
4985 e_machine with the conditions used to determine it. */
4987 i_ehdrp->e_machine = bed->elf_machine_code;
4990 i_ehdrp->e_version = bed->s->ev_current;
4991 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4993 /* No program header, for now. */
4994 i_ehdrp->e_phoff = 0;
4995 i_ehdrp->e_phentsize = 0;
4996 i_ehdrp->e_phnum = 0;
4998 /* Each bfd section is section header entry. */
4999 i_ehdrp->e_entry = bfd_get_start_address (abfd);
5000 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
5002 /* If we're building an executable, we'll need a program header table. */
5003 if (abfd->flags & EXEC_P)
5004 /* It all happens later. */
5008 i_ehdrp->e_phentsize = 0;
5010 i_ehdrp->e_phoff = 0;
5013 elf_tdata (abfd)->symtab_hdr.sh_name =
5014 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
5015 elf_tdata (abfd)->strtab_hdr.sh_name =
5016 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
5017 elf_tdata (abfd)->shstrtab_hdr.sh_name =
5018 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
5019 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
5020 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
5021 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
5027 /* Assign file positions for all the reloc sections which are not part
5028 of the loadable file image. */
5031 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
5034 unsigned int i, num_sec;
5035 Elf_Internal_Shdr **shdrpp;
5037 off = elf_tdata (abfd)->next_file_pos;
5039 num_sec = elf_numsections (abfd);
5040 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
5042 Elf_Internal_Shdr *shdrp;
5045 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
5046 && shdrp->sh_offset == -1)
5047 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
5050 elf_tdata (abfd)->next_file_pos = off;
5054 _bfd_elf_write_object_contents (bfd *abfd)
5056 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5057 Elf_Internal_Ehdr *i_ehdrp;
5058 Elf_Internal_Shdr **i_shdrp;
5060 unsigned int count, num_sec;
5062 if (! abfd->output_has_begun
5063 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
5066 i_shdrp = elf_elfsections (abfd);
5067 i_ehdrp = elf_elfheader (abfd);
5070 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
5074 _bfd_elf_assign_file_positions_for_relocs (abfd);
5076 /* After writing the headers, we need to write the sections too... */
5077 num_sec = elf_numsections (abfd);
5078 for (count = 1; count < num_sec; count++)
5080 if (bed->elf_backend_section_processing)
5081 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
5082 if (i_shdrp[count]->contents)
5084 bfd_size_type amt = i_shdrp[count]->sh_size;
5086 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
5087 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
5090 if (count == SHN_LORESERVE - 1)
5091 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
5094 /* Write out the section header names. */
5095 if (elf_shstrtab (abfd) != NULL
5096 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
5097 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
5100 if (bed->elf_backend_final_write_processing)
5101 (*bed->elf_backend_final_write_processing) (abfd,
5102 elf_tdata (abfd)->linker);
5104 return bed->s->write_shdrs_and_ehdr (abfd);
5108 _bfd_elf_write_corefile_contents (bfd *abfd)
5110 /* Hopefully this can be done just like an object file. */
5111 return _bfd_elf_write_object_contents (abfd);
5114 /* Given a section, search the header to find them. */
5117 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
5119 const struct elf_backend_data *bed;
5122 if (elf_section_data (asect) != NULL
5123 && elf_section_data (asect)->this_idx != 0)
5124 return elf_section_data (asect)->this_idx;
5126 if (bfd_is_abs_section (asect))
5128 else if (bfd_is_com_section (asect))
5130 else if (bfd_is_und_section (asect))
5135 bed = get_elf_backend_data (abfd);
5136 if (bed->elf_backend_section_from_bfd_section)
5140 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
5145 bfd_set_error (bfd_error_nonrepresentable_section);
5150 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5154 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5156 asymbol *asym_ptr = *asym_ptr_ptr;
5158 flagword flags = asym_ptr->flags;
5160 /* When gas creates relocations against local labels, it creates its
5161 own symbol for the section, but does put the symbol into the
5162 symbol chain, so udata is 0. When the linker is generating
5163 relocatable output, this section symbol may be for one of the
5164 input sections rather than the output section. */
5165 if (asym_ptr->udata.i == 0
5166 && (flags & BSF_SECTION_SYM)
5167 && asym_ptr->section)
5172 sec = asym_ptr->section;
5173 if (sec->owner != abfd && sec->output_section != NULL)
5174 sec = sec->output_section;
5175 if (sec->owner == abfd
5176 && (indx = sec->index) < elf_num_section_syms (abfd)
5177 && elf_section_syms (abfd)[indx] != NULL)
5178 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5181 idx = asym_ptr->udata.i;
5185 /* This case can occur when using --strip-symbol on a symbol
5186 which is used in a relocation entry. */
5187 (*_bfd_error_handler)
5188 (_("%B: symbol `%s' required but not present"),
5189 abfd, bfd_asymbol_name (asym_ptr));
5190 bfd_set_error (bfd_error_no_symbols);
5197 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5198 (long) asym_ptr, asym_ptr->name, idx, flags,
5199 elf_symbol_flags (flags));
5207 /* Rewrite program header information. */
5210 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
5212 Elf_Internal_Ehdr *iehdr;
5213 struct elf_segment_map *map;
5214 struct elf_segment_map *map_first;
5215 struct elf_segment_map **pointer_to_map;
5216 Elf_Internal_Phdr *segment;
5219 unsigned int num_segments;
5220 bfd_boolean phdr_included = FALSE;
5221 bfd_vma maxpagesize;
5222 struct elf_segment_map *phdr_adjust_seg = NULL;
5223 unsigned int phdr_adjust_num = 0;
5224 const struct elf_backend_data *bed;
5226 bed = get_elf_backend_data (ibfd);
5227 iehdr = elf_elfheader (ibfd);
5230 pointer_to_map = &map_first;
5232 num_segments = elf_elfheader (ibfd)->e_phnum;
5233 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5235 /* Returns the end address of the segment + 1. */
5236 #define SEGMENT_END(segment, start) \
5237 (start + (segment->p_memsz > segment->p_filesz \
5238 ? segment->p_memsz : segment->p_filesz))
5240 #define SECTION_SIZE(section, segment) \
5241 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5242 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5243 ? section->size : 0)
5245 /* Returns TRUE if the given section is contained within
5246 the given segment. VMA addresses are compared. */
5247 #define IS_CONTAINED_BY_VMA(section, segment) \
5248 (section->vma >= segment->p_vaddr \
5249 && (section->vma + SECTION_SIZE (section, segment) \
5250 <= (SEGMENT_END (segment, segment->p_vaddr))))
5252 /* Returns TRUE if the given section is contained within
5253 the given segment. LMA addresses are compared. */
5254 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5255 (section->lma >= base \
5256 && (section->lma + SECTION_SIZE (section, segment) \
5257 <= SEGMENT_END (segment, base)))
5259 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5260 #define IS_COREFILE_NOTE(p, s) \
5261 (p->p_type == PT_NOTE \
5262 && bfd_get_format (ibfd) == bfd_core \
5263 && s->vma == 0 && s->lma == 0 \
5264 && (bfd_vma) s->filepos >= p->p_offset \
5265 && ((bfd_vma) s->filepos + s->size \
5266 <= p->p_offset + p->p_filesz))
5268 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5269 linker, which generates a PT_INTERP section with p_vaddr and
5270 p_memsz set to 0. */
5271 #define IS_SOLARIS_PT_INTERP(p, s) \
5273 && p->p_paddr == 0 \
5274 && p->p_memsz == 0 \
5275 && p->p_filesz > 0 \
5276 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5278 && (bfd_vma) s->filepos >= p->p_offset \
5279 && ((bfd_vma) s->filepos + s->size \
5280 <= p->p_offset + p->p_filesz))
5282 /* Decide if the given section should be included in the given segment.
5283 A section will be included if:
5284 1. It is within the address space of the segment -- we use the LMA
5285 if that is set for the segment and the VMA otherwise,
5286 2. It is an allocated segment,
5287 3. There is an output section associated with it,
5288 4. The section has not already been allocated to a previous segment.
5289 5. PT_GNU_STACK segments do not include any sections.
5290 6. PT_TLS segment includes only SHF_TLS sections.
5291 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5292 8. PT_DYNAMIC should not contain empty sections at the beginning
5293 (with the possible exception of .dynamic). */
5294 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5295 ((((segment->p_paddr \
5296 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5297 : IS_CONTAINED_BY_VMA (section, segment)) \
5298 && (section->flags & SEC_ALLOC) != 0) \
5299 || IS_COREFILE_NOTE (segment, section)) \
5300 && segment->p_type != PT_GNU_STACK \
5301 && (segment->p_type != PT_TLS \
5302 || (section->flags & SEC_THREAD_LOCAL)) \
5303 && (segment->p_type == PT_LOAD \
5304 || segment->p_type == PT_TLS \
5305 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5306 && (segment->p_type != PT_DYNAMIC \
5307 || SECTION_SIZE (section, segment) > 0 \
5308 || (segment->p_paddr \
5309 ? segment->p_paddr != section->lma \
5310 : segment->p_vaddr != section->vma) \
5311 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5313 && ! section->segment_mark)
5315 /* If the output section of a section in the input segment is NULL,
5316 it is removed from the corresponding output segment. */
5317 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5318 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5319 && section->output_section != NULL)
5321 /* Returns TRUE iff seg1 starts after the end of seg2. */
5322 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5323 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5325 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5326 their VMA address ranges and their LMA address ranges overlap.
5327 It is possible to have overlapping VMA ranges without overlapping LMA
5328 ranges. RedBoot images for example can have both .data and .bss mapped
5329 to the same VMA range, but with the .data section mapped to a different
5331 #define SEGMENT_OVERLAPS(seg1, seg2) \
5332 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5333 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5334 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5335 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5337 /* Initialise the segment mark field. */
5338 for (section = ibfd->sections; section != NULL; section = section->next)
5339 section->segment_mark = FALSE;
5341 /* Scan through the segments specified in the program header
5342 of the input BFD. For this first scan we look for overlaps
5343 in the loadable segments. These can be created by weird
5344 parameters to objcopy. Also, fix some solaris weirdness. */
5345 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5350 Elf_Internal_Phdr *segment2;
5352 if (segment->p_type == PT_INTERP)
5353 for (section = ibfd->sections; section; section = section->next)
5354 if (IS_SOLARIS_PT_INTERP (segment, section))
5356 /* Mininal change so that the normal section to segment
5357 assignment code will work. */
5358 segment->p_vaddr = section->vma;
5362 if (segment->p_type != PT_LOAD)
5365 /* Determine if this segment overlaps any previous segments. */
5366 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
5368 bfd_signed_vma extra_length;
5370 if (segment2->p_type != PT_LOAD
5371 || ! SEGMENT_OVERLAPS (segment, segment2))
5374 /* Merge the two segments together. */
5375 if (segment2->p_vaddr < segment->p_vaddr)
5377 /* Extend SEGMENT2 to include SEGMENT and then delete
5380 SEGMENT_END (segment, segment->p_vaddr)
5381 - SEGMENT_END (segment2, segment2->p_vaddr);
5383 if (extra_length > 0)
5385 segment2->p_memsz += extra_length;
5386 segment2->p_filesz += extra_length;
5389 segment->p_type = PT_NULL;
5391 /* Since we have deleted P we must restart the outer loop. */
5393 segment = elf_tdata (ibfd)->phdr;
5398 /* Extend SEGMENT to include SEGMENT2 and then delete
5401 SEGMENT_END (segment2, segment2->p_vaddr)
5402 - SEGMENT_END (segment, segment->p_vaddr);
5404 if (extra_length > 0)
5406 segment->p_memsz += extra_length;
5407 segment->p_filesz += extra_length;
5410 segment2->p_type = PT_NULL;
5415 /* The second scan attempts to assign sections to segments. */
5416 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5420 unsigned int section_count;
5421 asection ** sections;
5422 asection * output_section;
5424 bfd_vma matching_lma;
5425 bfd_vma suggested_lma;
5428 asection * first_section;
5430 if (segment->p_type == PT_NULL)
5433 first_section = NULL;
5434 /* Compute how many sections might be placed into this segment. */
5435 for (section = ibfd->sections, section_count = 0;
5437 section = section->next)
5439 /* Find the first section in the input segment, which may be
5440 removed from the corresponding output segment. */
5441 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5443 if (first_section == NULL)
5444 first_section = section;
5445 if (section->output_section != NULL)
5450 /* Allocate a segment map big enough to contain
5451 all of the sections we have selected. */
5452 amt = sizeof (struct elf_segment_map);
5453 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5454 map = bfd_zalloc (obfd, amt);
5458 /* Initialise the fields of the segment map. Default to
5459 using the physical address of the segment in the input BFD. */
5461 map->p_type = segment->p_type;
5462 map->p_flags = segment->p_flags;
5463 map->p_flags_valid = 1;
5465 /* If the first section in the input segment is removed, there is
5466 no need to preserve segment physical address in the corresponding
5468 if (!first_section || first_section->output_section != NULL)
5470 map->p_paddr = segment->p_paddr;
5471 map->p_paddr_valid = 1;
5474 /* Determine if this segment contains the ELF file header
5475 and if it contains the program headers themselves. */
5476 map->includes_filehdr = (segment->p_offset == 0
5477 && segment->p_filesz >= iehdr->e_ehsize);
5479 map->includes_phdrs = 0;
5481 if (! phdr_included || segment->p_type != PT_LOAD)
5483 map->includes_phdrs =
5484 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5485 && (segment->p_offset + segment->p_filesz
5486 >= ((bfd_vma) iehdr->e_phoff
5487 + iehdr->e_phnum * iehdr->e_phentsize)));
5489 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5490 phdr_included = TRUE;
5493 if (section_count == 0)
5495 /* Special segments, such as the PT_PHDR segment, may contain
5496 no sections, but ordinary, loadable segments should contain
5497 something. They are allowed by the ELF spec however, so only
5498 a warning is produced. */
5499 if (segment->p_type == PT_LOAD)
5500 (*_bfd_error_handler)
5501 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5505 *pointer_to_map = map;
5506 pointer_to_map = &map->next;
5511 /* Now scan the sections in the input BFD again and attempt
5512 to add their corresponding output sections to the segment map.
5513 The problem here is how to handle an output section which has
5514 been moved (ie had its LMA changed). There are four possibilities:
5516 1. None of the sections have been moved.
5517 In this case we can continue to use the segment LMA from the
5520 2. All of the sections have been moved by the same amount.
5521 In this case we can change the segment's LMA to match the LMA
5522 of the first section.
5524 3. Some of the sections have been moved, others have not.
5525 In this case those sections which have not been moved can be
5526 placed in the current segment which will have to have its size,
5527 and possibly its LMA changed, and a new segment or segments will
5528 have to be created to contain the other sections.
5530 4. The sections have been moved, but not by the same amount.
5531 In this case we can change the segment's LMA to match the LMA
5532 of the first section and we will have to create a new segment
5533 or segments to contain the other sections.
5535 In order to save time, we allocate an array to hold the section
5536 pointers that we are interested in. As these sections get assigned
5537 to a segment, they are removed from this array. */
5539 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5540 to work around this long long bug. */
5541 sections = bfd_malloc2 (section_count, sizeof (asection *));
5542 if (sections == NULL)
5545 /* Step One: Scan for segment vs section LMA conflicts.
5546 Also add the sections to the section array allocated above.
5547 Also add the sections to the current segment. In the common
5548 case, where the sections have not been moved, this means that
5549 we have completely filled the segment, and there is nothing
5555 for (j = 0, section = ibfd->sections;
5557 section = section->next)
5559 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5561 output_section = section->output_section;
5563 sections[j ++] = section;
5565 /* The Solaris native linker always sets p_paddr to 0.
5566 We try to catch that case here, and set it to the
5567 correct value. Note - some backends require that
5568 p_paddr be left as zero. */
5569 if (segment->p_paddr == 0
5570 && segment->p_vaddr != 0
5571 && (! bed->want_p_paddr_set_to_zero)
5573 && output_section->lma != 0
5574 && (output_section->vma == (segment->p_vaddr
5575 + (map->includes_filehdr
5578 + (map->includes_phdrs
5580 * iehdr->e_phentsize)
5582 map->p_paddr = segment->p_vaddr;
5584 /* Match up the physical address of the segment with the
5585 LMA address of the output section. */
5586 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5587 || IS_COREFILE_NOTE (segment, section)
5588 || (bed->want_p_paddr_set_to_zero &&
5589 IS_CONTAINED_BY_VMA (output_section, segment))
5592 if (matching_lma == 0)
5593 matching_lma = output_section->lma;
5595 /* We assume that if the section fits within the segment
5596 then it does not overlap any other section within that
5598 map->sections[isec ++] = output_section;
5600 else if (suggested_lma == 0)
5601 suggested_lma = output_section->lma;
5605 BFD_ASSERT (j == section_count);
5607 /* Step Two: Adjust the physical address of the current segment,
5609 if (isec == section_count)
5611 /* All of the sections fitted within the segment as currently
5612 specified. This is the default case. Add the segment to
5613 the list of built segments and carry on to process the next
5614 program header in the input BFD. */
5615 map->count = section_count;
5616 *pointer_to_map = map;
5617 pointer_to_map = &map->next;
5619 if (matching_lma != map->p_paddr
5620 && !map->includes_filehdr && !map->includes_phdrs)
5621 /* There is some padding before the first section in the
5622 segment. So, we must account for that in the output
5624 map->p_vaddr_offset = matching_lma - map->p_paddr;
5631 if (matching_lma != 0)
5633 /* At least one section fits inside the current segment.
5634 Keep it, but modify its physical address to match the
5635 LMA of the first section that fitted. */
5636 map->p_paddr = matching_lma;
5640 /* None of the sections fitted inside the current segment.
5641 Change the current segment's physical address to match
5642 the LMA of the first section. */
5643 map->p_paddr = suggested_lma;
5646 /* Offset the segment physical address from the lma
5647 to allow for space taken up by elf headers. */
5648 if (map->includes_filehdr)
5649 map->p_paddr -= iehdr->e_ehsize;
5651 if (map->includes_phdrs)
5653 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5655 /* iehdr->e_phnum is just an estimate of the number
5656 of program headers that we will need. Make a note
5657 here of the number we used and the segment we chose
5658 to hold these headers, so that we can adjust the
5659 offset when we know the correct value. */
5660 phdr_adjust_num = iehdr->e_phnum;
5661 phdr_adjust_seg = map;
5665 /* Step Three: Loop over the sections again, this time assigning
5666 those that fit to the current segment and removing them from the
5667 sections array; but making sure not to leave large gaps. Once all
5668 possible sections have been assigned to the current segment it is
5669 added to the list of built segments and if sections still remain
5670 to be assigned, a new segment is constructed before repeating
5678 /* Fill the current segment with sections that fit. */
5679 for (j = 0; j < section_count; j++)
5681 section = sections[j];
5683 if (section == NULL)
5686 output_section = section->output_section;
5688 BFD_ASSERT (output_section != NULL);
5690 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5691 || IS_COREFILE_NOTE (segment, section))
5693 if (map->count == 0)
5695 /* If the first section in a segment does not start at
5696 the beginning of the segment, then something is
5698 if (output_section->lma !=
5700 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5701 + (map->includes_phdrs
5702 ? iehdr->e_phnum * iehdr->e_phentsize
5708 asection * prev_sec;
5710 prev_sec = map->sections[map->count - 1];
5712 /* If the gap between the end of the previous section
5713 and the start of this section is more than
5714 maxpagesize then we need to start a new segment. */
5715 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5717 < BFD_ALIGN (output_section->lma, maxpagesize))
5718 || ((prev_sec->lma + prev_sec->size)
5719 > output_section->lma))
5721 if (suggested_lma == 0)
5722 suggested_lma = output_section->lma;
5728 map->sections[map->count++] = output_section;
5731 section->segment_mark = TRUE;
5733 else if (suggested_lma == 0)
5734 suggested_lma = output_section->lma;
5737 BFD_ASSERT (map->count > 0);
5739 /* Add the current segment to the list of built segments. */
5740 *pointer_to_map = map;
5741 pointer_to_map = &map->next;
5743 if (isec < section_count)
5745 /* We still have not allocated all of the sections to
5746 segments. Create a new segment here, initialise it
5747 and carry on looping. */
5748 amt = sizeof (struct elf_segment_map);
5749 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5750 map = bfd_alloc (obfd, amt);
5757 /* Initialise the fields of the segment map. Set the physical
5758 physical address to the LMA of the first section that has
5759 not yet been assigned. */
5761 map->p_type = segment->p_type;
5762 map->p_flags = segment->p_flags;
5763 map->p_flags_valid = 1;
5764 map->p_paddr = suggested_lma;
5765 map->p_paddr_valid = 1;
5766 map->includes_filehdr = 0;
5767 map->includes_phdrs = 0;
5770 while (isec < section_count);
5775 /* The Solaris linker creates program headers in which all the
5776 p_paddr fields are zero. When we try to objcopy or strip such a
5777 file, we get confused. Check for this case, and if we find it
5778 reset the p_paddr_valid fields. */
5779 for (map = map_first; map != NULL; map = map->next)
5780 if (map->p_paddr != 0)
5783 for (map = map_first; map != NULL; map = map->next)
5784 map->p_paddr_valid = 0;
5786 elf_tdata (obfd)->segment_map = map_first;
5788 /* If we had to estimate the number of program headers that were
5789 going to be needed, then check our estimate now and adjust
5790 the offset if necessary. */
5791 if (phdr_adjust_seg != NULL)
5795 for (count = 0, map = map_first; map != NULL; map = map->next)
5798 if (count > phdr_adjust_num)
5799 phdr_adjust_seg->p_paddr
5800 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5805 #undef IS_CONTAINED_BY_VMA
5806 #undef IS_CONTAINED_BY_LMA
5807 #undef IS_COREFILE_NOTE
5808 #undef IS_SOLARIS_PT_INTERP
5809 #undef IS_SECTION_IN_INPUT_SEGMENT
5810 #undef INCLUDE_SECTION_IN_SEGMENT
5811 #undef SEGMENT_AFTER_SEGMENT
5812 #undef SEGMENT_OVERLAPS
5816 /* Copy ELF program header information. */
5819 copy_elf_program_header (bfd *ibfd, bfd *obfd)
5821 Elf_Internal_Ehdr *iehdr;
5822 struct elf_segment_map *map;
5823 struct elf_segment_map *map_first;
5824 struct elf_segment_map **pointer_to_map;
5825 Elf_Internal_Phdr *segment;
5827 unsigned int num_segments;
5828 bfd_boolean phdr_included = FALSE;
5830 iehdr = elf_elfheader (ibfd);
5833 pointer_to_map = &map_first;
5835 num_segments = elf_elfheader (ibfd)->e_phnum;
5836 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5841 unsigned int section_count;
5843 Elf_Internal_Shdr *this_hdr;
5844 asection *first_section = NULL;
5846 /* FIXME: Do we need to copy PT_NULL segment? */
5847 if (segment->p_type == PT_NULL)
5850 /* Compute how many sections are in this segment. */
5851 for (section = ibfd->sections, section_count = 0;
5853 section = section->next)
5855 this_hdr = &(elf_section_data(section)->this_hdr);
5856 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5859 first_section = section;
5864 /* Allocate a segment map big enough to contain
5865 all of the sections we have selected. */
5866 amt = sizeof (struct elf_segment_map);
5867 if (section_count != 0)
5868 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5869 map = bfd_zalloc (obfd, amt);
5873 /* Initialize the fields of the output segment map with the
5876 map->p_type = segment->p_type;
5877 map->p_flags = segment->p_flags;
5878 map->p_flags_valid = 1;
5879 map->p_paddr = segment->p_paddr;
5880 map->p_paddr_valid = 1;
5881 map->p_align = segment->p_align;
5882 map->p_align_valid = 1;
5883 map->p_vaddr_offset = 0;
5885 /* Determine if this segment contains the ELF file header
5886 and if it contains the program headers themselves. */
5887 map->includes_filehdr = (segment->p_offset == 0
5888 && segment->p_filesz >= iehdr->e_ehsize);
5890 map->includes_phdrs = 0;
5891 if (! phdr_included || segment->p_type != PT_LOAD)
5893 map->includes_phdrs =
5894 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5895 && (segment->p_offset + segment->p_filesz
5896 >= ((bfd_vma) iehdr->e_phoff
5897 + iehdr->e_phnum * iehdr->e_phentsize)));
5899 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5900 phdr_included = TRUE;
5903 if (!map->includes_phdrs && !map->includes_filehdr)
5904 /* There is some other padding before the first section. */
5905 map->p_vaddr_offset = ((first_section ? first_section->lma : 0)
5906 - segment->p_paddr);
5908 if (section_count != 0)
5910 unsigned int isec = 0;
5912 for (section = first_section;
5914 section = section->next)
5916 this_hdr = &(elf_section_data(section)->this_hdr);
5917 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5919 map->sections[isec++] = section->output_section;
5920 if (isec == section_count)
5926 map->count = section_count;
5927 *pointer_to_map = map;
5928 pointer_to_map = &map->next;
5931 elf_tdata (obfd)->segment_map = map_first;
5935 /* Copy private BFD data. This copies or rewrites ELF program header
5939 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5941 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5942 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5945 if (elf_tdata (ibfd)->phdr == NULL)
5948 if (ibfd->xvec == obfd->xvec)
5950 /* Check to see if any sections in the input BFD
5951 covered by ELF program header have changed. */
5952 Elf_Internal_Phdr *segment;
5953 asection *section, *osec;
5954 unsigned int i, num_segments;
5955 Elf_Internal_Shdr *this_hdr;
5957 /* Initialize the segment mark field. */
5958 for (section = obfd->sections; section != NULL;
5959 section = section->next)
5960 section->segment_mark = FALSE;
5962 num_segments = elf_elfheader (ibfd)->e_phnum;
5963 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5967 /* PR binutils/3535. The Solaris linker always sets the p_paddr
5968 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
5969 which severly confuses things, so always regenerate the segment
5970 map in this case. */
5971 if (segment->p_paddr == 0
5972 && segment->p_memsz == 0
5973 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
5976 for (section = ibfd->sections;
5977 section != NULL; section = section->next)
5979 /* We mark the output section so that we know it comes
5980 from the input BFD. */
5981 osec = section->output_section;
5983 osec->segment_mark = TRUE;
5985 /* Check if this section is covered by the segment. */
5986 this_hdr = &(elf_section_data(section)->this_hdr);
5987 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5989 /* FIXME: Check if its output section is changed or
5990 removed. What else do we need to check? */
5992 || section->flags != osec->flags
5993 || section->lma != osec->lma
5994 || section->vma != osec->vma
5995 || section->size != osec->size
5996 || section->rawsize != osec->rawsize
5997 || section->alignment_power != osec->alignment_power)
6003 /* Check to see if any output section do not come from the
6005 for (section = obfd->sections; section != NULL;
6006 section = section->next)
6008 if (section->segment_mark == FALSE)
6011 section->segment_mark = FALSE;
6014 return copy_elf_program_header (ibfd, obfd);
6018 return rewrite_elf_program_header (ibfd, obfd);
6021 /* Initialize private output section information from input section. */
6024 _bfd_elf_init_private_section_data (bfd *ibfd,
6028 struct bfd_link_info *link_info)
6031 Elf_Internal_Shdr *ihdr, *ohdr;
6032 bfd_boolean need_group = link_info == NULL || link_info->relocatable;
6034 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6035 || obfd->xvec->flavour != bfd_target_elf_flavour)
6038 /* Don't copy the output ELF section type from input if the
6039 output BFD section flags have been set to something different.
6040 elf_fake_sections will set ELF section type based on BFD
6042 if (osec->flags == isec->flags || !osec->flags)
6044 BFD_ASSERT (osec->flags == isec->flags
6046 && elf_section_type (osec) == SHT_NULL));
6047 elf_section_type (osec) = elf_section_type (isec);
6050 /* FIXME: Is this correct for all OS/PROC specific flags? */
6051 elf_section_flags (osec) |= (elf_section_flags (isec)
6052 & (SHF_MASKOS | SHF_MASKPROC));
6054 /* Set things up for objcopy and relocatable link. The output
6055 SHT_GROUP section will have its elf_next_in_group pointing back
6056 to the input group members. Ignore linker created group section.
6057 See elfNN_ia64_object_p in elfxx-ia64.c. */
6060 if (elf_sec_group (isec) == NULL
6061 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
6063 if (elf_section_flags (isec) & SHF_GROUP)
6064 elf_section_flags (osec) |= SHF_GROUP;
6065 elf_next_in_group (osec) = elf_next_in_group (isec);
6066 elf_group_name (osec) = elf_group_name (isec);
6070 ihdr = &elf_section_data (isec)->this_hdr;
6072 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
6073 don't use the output section of the linked-to section since it
6074 may be NULL at this point. */
6075 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
6077 ohdr = &elf_section_data (osec)->this_hdr;
6078 ohdr->sh_flags |= SHF_LINK_ORDER;
6079 elf_linked_to_section (osec) = elf_linked_to_section (isec);
6082 osec->use_rela_p = isec->use_rela_p;
6087 /* Copy private section information. This copies over the entsize
6088 field, and sometimes the info field. */
6091 _bfd_elf_copy_private_section_data (bfd *ibfd,
6096 Elf_Internal_Shdr *ihdr, *ohdr;
6098 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6099 || obfd->xvec->flavour != bfd_target_elf_flavour)
6102 ihdr = &elf_section_data (isec)->this_hdr;
6103 ohdr = &elf_section_data (osec)->this_hdr;
6105 ohdr->sh_entsize = ihdr->sh_entsize;
6107 if (ihdr->sh_type == SHT_SYMTAB
6108 || ihdr->sh_type == SHT_DYNSYM
6109 || ihdr->sh_type == SHT_GNU_verneed
6110 || ihdr->sh_type == SHT_GNU_verdef)
6111 ohdr->sh_info = ihdr->sh_info;
6113 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
6117 /* Copy private header information. */
6120 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
6124 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6125 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6128 /* Copy over private BFD data if it has not already been copied.
6129 This must be done here, rather than in the copy_private_bfd_data
6130 entry point, because the latter is called after the section
6131 contents have been set, which means that the program headers have
6132 already been worked out. */
6133 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
6135 if (! copy_private_bfd_data (ibfd, obfd))
6139 /* _bfd_elf_copy_private_section_data copied over the SHF_GROUP flag
6140 but this might be wrong if we deleted the group section. */
6141 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
6142 if (elf_section_type (isec) == SHT_GROUP
6143 && isec->output_section == NULL)
6145 asection *first = elf_next_in_group (isec);
6146 asection *s = first;
6149 if (s->output_section != NULL)
6151 elf_section_flags (s->output_section) &= ~SHF_GROUP;
6152 elf_group_name (s->output_section) = NULL;
6154 s = elf_next_in_group (s);
6163 /* Copy private symbol information. If this symbol is in a section
6164 which we did not map into a BFD section, try to map the section
6165 index correctly. We use special macro definitions for the mapped
6166 section indices; these definitions are interpreted by the
6167 swap_out_syms function. */
6169 #define MAP_ONESYMTAB (SHN_HIOS + 1)
6170 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
6171 #define MAP_STRTAB (SHN_HIOS + 3)
6172 #define MAP_SHSTRTAB (SHN_HIOS + 4)
6173 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
6176 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
6181 elf_symbol_type *isym, *osym;
6183 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6184 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6187 isym = elf_symbol_from (ibfd, isymarg);
6188 osym = elf_symbol_from (obfd, osymarg);
6192 && bfd_is_abs_section (isym->symbol.section))
6196 shndx = isym->internal_elf_sym.st_shndx;
6197 if (shndx == elf_onesymtab (ibfd))
6198 shndx = MAP_ONESYMTAB;
6199 else if (shndx == elf_dynsymtab (ibfd))
6200 shndx = MAP_DYNSYMTAB;
6201 else if (shndx == elf_tdata (ibfd)->strtab_section)
6203 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
6204 shndx = MAP_SHSTRTAB;
6205 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
6206 shndx = MAP_SYM_SHNDX;
6207 osym->internal_elf_sym.st_shndx = shndx;
6213 /* Swap out the symbols. */
6216 swap_out_syms (bfd *abfd,
6217 struct bfd_strtab_hash **sttp,
6220 const struct elf_backend_data *bed;
6223 struct bfd_strtab_hash *stt;
6224 Elf_Internal_Shdr *symtab_hdr;
6225 Elf_Internal_Shdr *symtab_shndx_hdr;
6226 Elf_Internal_Shdr *symstrtab_hdr;
6227 bfd_byte *outbound_syms;
6228 bfd_byte *outbound_shndx;
6231 bfd_boolean name_local_sections;
6233 if (!elf_map_symbols (abfd))
6236 /* Dump out the symtabs. */
6237 stt = _bfd_elf_stringtab_init ();
6241 bed = get_elf_backend_data (abfd);
6242 symcount = bfd_get_symcount (abfd);
6243 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6244 symtab_hdr->sh_type = SHT_SYMTAB;
6245 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6246 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6247 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
6248 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
6250 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6251 symstrtab_hdr->sh_type = SHT_STRTAB;
6253 outbound_syms = bfd_alloc2 (abfd, 1 + symcount, bed->s->sizeof_sym);
6254 if (outbound_syms == NULL)
6256 _bfd_stringtab_free (stt);
6259 symtab_hdr->contents = outbound_syms;
6261 outbound_shndx = NULL;
6262 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6263 if (symtab_shndx_hdr->sh_name != 0)
6265 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6266 outbound_shndx = bfd_zalloc2 (abfd, 1 + symcount,
6267 sizeof (Elf_External_Sym_Shndx));
6268 if (outbound_shndx == NULL)
6270 _bfd_stringtab_free (stt);
6274 symtab_shndx_hdr->contents = outbound_shndx;
6275 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6276 symtab_shndx_hdr->sh_size = amt;
6277 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6278 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6281 /* Now generate the data (for "contents"). */
6283 /* Fill in zeroth symbol and swap it out. */
6284 Elf_Internal_Sym sym;
6290 sym.st_shndx = SHN_UNDEF;
6291 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6292 outbound_syms += bed->s->sizeof_sym;
6293 if (outbound_shndx != NULL)
6294 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6298 = (bed->elf_backend_name_local_section_symbols
6299 && bed->elf_backend_name_local_section_symbols (abfd));
6301 syms = bfd_get_outsymbols (abfd);
6302 for (idx = 0; idx < symcount; idx++)
6304 Elf_Internal_Sym sym;
6305 bfd_vma value = syms[idx]->value;
6306 elf_symbol_type *type_ptr;
6307 flagword flags = syms[idx]->flags;
6310 if (!name_local_sections
6311 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6313 /* Local section symbols have no name. */
6318 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6321 if (sym.st_name == (unsigned long) -1)
6323 _bfd_stringtab_free (stt);
6328 type_ptr = elf_symbol_from (abfd, syms[idx]);
6330 if ((flags & BSF_SECTION_SYM) == 0
6331 && bfd_is_com_section (syms[idx]->section))
6333 /* ELF common symbols put the alignment into the `value' field,
6334 and the size into the `size' field. This is backwards from
6335 how BFD handles it, so reverse it here. */
6336 sym.st_size = value;
6337 if (type_ptr == NULL
6338 || type_ptr->internal_elf_sym.st_value == 0)
6339 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6341 sym.st_value = type_ptr->internal_elf_sym.st_value;
6342 sym.st_shndx = _bfd_elf_section_from_bfd_section
6343 (abfd, syms[idx]->section);
6347 asection *sec = syms[idx]->section;
6350 if (sec->output_section)
6352 value += sec->output_offset;
6353 sec = sec->output_section;
6356 /* Don't add in the section vma for relocatable output. */
6357 if (! relocatable_p)
6359 sym.st_value = value;
6360 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6362 if (bfd_is_abs_section (sec)
6364 && type_ptr->internal_elf_sym.st_shndx != 0)
6366 /* This symbol is in a real ELF section which we did
6367 not create as a BFD section. Undo the mapping done
6368 by copy_private_symbol_data. */
6369 shndx = type_ptr->internal_elf_sym.st_shndx;
6373 shndx = elf_onesymtab (abfd);
6376 shndx = elf_dynsymtab (abfd);
6379 shndx = elf_tdata (abfd)->strtab_section;
6382 shndx = elf_tdata (abfd)->shstrtab_section;
6385 shndx = elf_tdata (abfd)->symtab_shndx_section;
6393 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6399 /* Writing this would be a hell of a lot easier if
6400 we had some decent documentation on bfd, and
6401 knew what to expect of the library, and what to
6402 demand of applications. For example, it
6403 appears that `objcopy' might not set the
6404 section of a symbol to be a section that is
6405 actually in the output file. */
6406 sec2 = bfd_get_section_by_name (abfd, sec->name);
6409 _bfd_error_handler (_("\
6410 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6411 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6413 bfd_set_error (bfd_error_invalid_operation);
6414 _bfd_stringtab_free (stt);
6418 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6419 BFD_ASSERT (shndx != -1);
6423 sym.st_shndx = shndx;
6426 if ((flags & BSF_THREAD_LOCAL) != 0)
6428 else if ((flags & BSF_FUNCTION) != 0)
6430 else if ((flags & BSF_OBJECT) != 0)
6432 else if ((flags & BSF_RELC) != 0)
6434 else if ((flags & BSF_SRELC) != 0)
6439 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6442 /* Processor-specific types. */
6443 if (type_ptr != NULL
6444 && bed->elf_backend_get_symbol_type)
6445 type = ((*bed->elf_backend_get_symbol_type)
6446 (&type_ptr->internal_elf_sym, type));
6448 if (flags & BSF_SECTION_SYM)
6450 if (flags & BSF_GLOBAL)
6451 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6453 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6455 else if (bfd_is_com_section (syms[idx]->section))
6456 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6457 else if (bfd_is_und_section (syms[idx]->section))
6458 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6462 else if (flags & BSF_FILE)
6463 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6466 int bind = STB_LOCAL;
6468 if (flags & BSF_LOCAL)
6470 else if (flags & BSF_WEAK)
6472 else if (flags & BSF_GLOBAL)
6475 sym.st_info = ELF_ST_INFO (bind, type);
6478 if (type_ptr != NULL)
6479 sym.st_other = type_ptr->internal_elf_sym.st_other;
6483 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6484 outbound_syms += bed->s->sizeof_sym;
6485 if (outbound_shndx != NULL)
6486 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6490 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6491 symstrtab_hdr->sh_type = SHT_STRTAB;
6493 symstrtab_hdr->sh_flags = 0;
6494 symstrtab_hdr->sh_addr = 0;
6495 symstrtab_hdr->sh_entsize = 0;
6496 symstrtab_hdr->sh_link = 0;
6497 symstrtab_hdr->sh_info = 0;
6498 symstrtab_hdr->sh_addralign = 1;
6503 /* Return the number of bytes required to hold the symtab vector.
6505 Note that we base it on the count plus 1, since we will null terminate
6506 the vector allocated based on this size. However, the ELF symbol table
6507 always has a dummy entry as symbol #0, so it ends up even. */
6510 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6514 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6516 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6517 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6519 symtab_size -= sizeof (asymbol *);
6525 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6529 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6531 if (elf_dynsymtab (abfd) == 0)
6533 bfd_set_error (bfd_error_invalid_operation);
6537 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6538 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6540 symtab_size -= sizeof (asymbol *);
6546 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6549 return (asect->reloc_count + 1) * sizeof (arelent *);
6552 /* Canonicalize the relocs. */
6555 _bfd_elf_canonicalize_reloc (bfd *abfd,
6562 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6564 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6567 tblptr = section->relocation;
6568 for (i = 0; i < section->reloc_count; i++)
6569 *relptr++ = tblptr++;
6573 return section->reloc_count;
6577 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6579 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6580 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6583 bfd_get_symcount (abfd) = symcount;
6588 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6589 asymbol **allocation)
6591 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6592 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6595 bfd_get_dynamic_symcount (abfd) = symcount;
6599 /* Return the size required for the dynamic reloc entries. Any loadable
6600 section that was actually installed in the BFD, and has type SHT_REL
6601 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6602 dynamic reloc section. */
6605 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6610 if (elf_dynsymtab (abfd) == 0)
6612 bfd_set_error (bfd_error_invalid_operation);
6616 ret = sizeof (arelent *);
6617 for (s = abfd->sections; s != NULL; s = s->next)
6618 if ((s->flags & SEC_LOAD) != 0
6619 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6620 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6621 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6622 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6623 * sizeof (arelent *));
6628 /* Canonicalize the dynamic relocation entries. Note that we return the
6629 dynamic relocations as a single block, although they are actually
6630 associated with particular sections; the interface, which was
6631 designed for SunOS style shared libraries, expects that there is only
6632 one set of dynamic relocs. Any loadable section that was actually
6633 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6634 dynamic symbol table, is considered to be a dynamic reloc section. */
6637 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6641 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6645 if (elf_dynsymtab (abfd) == 0)
6647 bfd_set_error (bfd_error_invalid_operation);
6651 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6653 for (s = abfd->sections; s != NULL; s = s->next)
6655 if ((s->flags & SEC_LOAD) != 0
6656 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6657 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6658 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6663 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6665 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6667 for (i = 0; i < count; i++)
6678 /* Read in the version information. */
6681 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6683 bfd_byte *contents = NULL;
6684 unsigned int freeidx = 0;
6686 if (elf_dynverref (abfd) != 0)
6688 Elf_Internal_Shdr *hdr;
6689 Elf_External_Verneed *everneed;
6690 Elf_Internal_Verneed *iverneed;
6692 bfd_byte *contents_end;
6694 hdr = &elf_tdata (abfd)->dynverref_hdr;
6696 elf_tdata (abfd)->verref = bfd_zalloc2 (abfd, hdr->sh_info,
6697 sizeof (Elf_Internal_Verneed));
6698 if (elf_tdata (abfd)->verref == NULL)
6701 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6703 contents = bfd_malloc (hdr->sh_size);
6704 if (contents == NULL)
6706 error_return_verref:
6707 elf_tdata (abfd)->verref = NULL;
6708 elf_tdata (abfd)->cverrefs = 0;
6711 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6712 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6713 goto error_return_verref;
6715 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6716 goto error_return_verref;
6718 BFD_ASSERT (sizeof (Elf_External_Verneed)
6719 == sizeof (Elf_External_Vernaux));
6720 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6721 everneed = (Elf_External_Verneed *) contents;
6722 iverneed = elf_tdata (abfd)->verref;
6723 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6725 Elf_External_Vernaux *evernaux;
6726 Elf_Internal_Vernaux *ivernaux;
6729 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6731 iverneed->vn_bfd = abfd;
6733 iverneed->vn_filename =
6734 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6736 if (iverneed->vn_filename == NULL)
6737 goto error_return_verref;
6739 if (iverneed->vn_cnt == 0)
6740 iverneed->vn_auxptr = NULL;
6743 iverneed->vn_auxptr = bfd_alloc2 (abfd, iverneed->vn_cnt,
6744 sizeof (Elf_Internal_Vernaux));
6745 if (iverneed->vn_auxptr == NULL)
6746 goto error_return_verref;
6749 if (iverneed->vn_aux
6750 > (size_t) (contents_end - (bfd_byte *) everneed))
6751 goto error_return_verref;
6753 evernaux = ((Elf_External_Vernaux *)
6754 ((bfd_byte *) everneed + iverneed->vn_aux));
6755 ivernaux = iverneed->vn_auxptr;
6756 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6758 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6760 ivernaux->vna_nodename =
6761 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6762 ivernaux->vna_name);
6763 if (ivernaux->vna_nodename == NULL)
6764 goto error_return_verref;
6766 if (j + 1 < iverneed->vn_cnt)
6767 ivernaux->vna_nextptr = ivernaux + 1;
6769 ivernaux->vna_nextptr = NULL;
6771 if (ivernaux->vna_next
6772 > (size_t) (contents_end - (bfd_byte *) evernaux))
6773 goto error_return_verref;
6775 evernaux = ((Elf_External_Vernaux *)
6776 ((bfd_byte *) evernaux + ivernaux->vna_next));
6778 if (ivernaux->vna_other > freeidx)
6779 freeidx = ivernaux->vna_other;
6782 if (i + 1 < hdr->sh_info)
6783 iverneed->vn_nextref = iverneed + 1;
6785 iverneed->vn_nextref = NULL;
6787 if (iverneed->vn_next
6788 > (size_t) (contents_end - (bfd_byte *) everneed))
6789 goto error_return_verref;
6791 everneed = ((Elf_External_Verneed *)
6792 ((bfd_byte *) everneed + iverneed->vn_next));
6799 if (elf_dynverdef (abfd) != 0)
6801 Elf_Internal_Shdr *hdr;
6802 Elf_External_Verdef *everdef;
6803 Elf_Internal_Verdef *iverdef;
6804 Elf_Internal_Verdef *iverdefarr;
6805 Elf_Internal_Verdef iverdefmem;
6807 unsigned int maxidx;
6808 bfd_byte *contents_end_def, *contents_end_aux;
6810 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6812 contents = bfd_malloc (hdr->sh_size);
6813 if (contents == NULL)
6815 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6816 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6819 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
6822 BFD_ASSERT (sizeof (Elf_External_Verdef)
6823 >= sizeof (Elf_External_Verdaux));
6824 contents_end_def = contents + hdr->sh_size
6825 - sizeof (Elf_External_Verdef);
6826 contents_end_aux = contents + hdr->sh_size
6827 - sizeof (Elf_External_Verdaux);
6829 /* We know the number of entries in the section but not the maximum
6830 index. Therefore we have to run through all entries and find
6832 everdef = (Elf_External_Verdef *) contents;
6834 for (i = 0; i < hdr->sh_info; ++i)
6836 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6838 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6839 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6841 if (iverdefmem.vd_next
6842 > (size_t) (contents_end_def - (bfd_byte *) everdef))
6845 everdef = ((Elf_External_Verdef *)
6846 ((bfd_byte *) everdef + iverdefmem.vd_next));
6849 if (default_imported_symver)
6851 if (freeidx > maxidx)
6856 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, maxidx,
6857 sizeof (Elf_Internal_Verdef));
6858 if (elf_tdata (abfd)->verdef == NULL)
6861 elf_tdata (abfd)->cverdefs = maxidx;
6863 everdef = (Elf_External_Verdef *) contents;
6864 iverdefarr = elf_tdata (abfd)->verdef;
6865 for (i = 0; i < hdr->sh_info; i++)
6867 Elf_External_Verdaux *everdaux;
6868 Elf_Internal_Verdaux *iverdaux;
6871 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6873 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
6875 error_return_verdef:
6876 elf_tdata (abfd)->verdef = NULL;
6877 elf_tdata (abfd)->cverdefs = 0;
6881 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6882 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6884 iverdef->vd_bfd = abfd;
6886 if (iverdef->vd_cnt == 0)
6887 iverdef->vd_auxptr = NULL;
6890 iverdef->vd_auxptr = bfd_alloc2 (abfd, iverdef->vd_cnt,
6891 sizeof (Elf_Internal_Verdaux));
6892 if (iverdef->vd_auxptr == NULL)
6893 goto error_return_verdef;
6897 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
6898 goto error_return_verdef;
6900 everdaux = ((Elf_External_Verdaux *)
6901 ((bfd_byte *) everdef + iverdef->vd_aux));
6902 iverdaux = iverdef->vd_auxptr;
6903 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6905 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6907 iverdaux->vda_nodename =
6908 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6909 iverdaux->vda_name);
6910 if (iverdaux->vda_nodename == NULL)
6911 goto error_return_verdef;
6913 if (j + 1 < iverdef->vd_cnt)
6914 iverdaux->vda_nextptr = iverdaux + 1;
6916 iverdaux->vda_nextptr = NULL;
6918 if (iverdaux->vda_next
6919 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
6920 goto error_return_verdef;
6922 everdaux = ((Elf_External_Verdaux *)
6923 ((bfd_byte *) everdaux + iverdaux->vda_next));
6926 if (iverdef->vd_cnt)
6927 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6929 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
6930 iverdef->vd_nextdef = iverdef + 1;
6932 iverdef->vd_nextdef = NULL;
6934 everdef = ((Elf_External_Verdef *)
6935 ((bfd_byte *) everdef + iverdef->vd_next));
6941 else if (default_imported_symver)
6948 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, freeidx,
6949 sizeof (Elf_Internal_Verdef));
6950 if (elf_tdata (abfd)->verdef == NULL)
6953 elf_tdata (abfd)->cverdefs = freeidx;
6956 /* Create a default version based on the soname. */
6957 if (default_imported_symver)
6959 Elf_Internal_Verdef *iverdef;
6960 Elf_Internal_Verdaux *iverdaux;
6962 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6964 iverdef->vd_version = VER_DEF_CURRENT;
6965 iverdef->vd_flags = 0;
6966 iverdef->vd_ndx = freeidx;
6967 iverdef->vd_cnt = 1;
6969 iverdef->vd_bfd = abfd;
6971 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6972 if (iverdef->vd_nodename == NULL)
6973 goto error_return_verdef;
6974 iverdef->vd_nextdef = NULL;
6975 iverdef->vd_auxptr = bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
6976 if (iverdef->vd_auxptr == NULL)
6977 goto error_return_verdef;
6979 iverdaux = iverdef->vd_auxptr;
6980 iverdaux->vda_nodename = iverdef->vd_nodename;
6981 iverdaux->vda_nextptr = NULL;
6987 if (contents != NULL)
6993 _bfd_elf_make_empty_symbol (bfd *abfd)
6995 elf_symbol_type *newsym;
6996 bfd_size_type amt = sizeof (elf_symbol_type);
6998 newsym = bfd_zalloc (abfd, amt);
7003 newsym->symbol.the_bfd = abfd;
7004 return &newsym->symbol;
7009 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
7013 bfd_symbol_info (symbol, ret);
7016 /* Return whether a symbol name implies a local symbol. Most targets
7017 use this function for the is_local_label_name entry point, but some
7021 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
7024 /* Normal local symbols start with ``.L''. */
7025 if (name[0] == '.' && name[1] == 'L')
7028 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
7029 DWARF debugging symbols starting with ``..''. */
7030 if (name[0] == '.' && name[1] == '.')
7033 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
7034 emitting DWARF debugging output. I suspect this is actually a
7035 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
7036 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
7037 underscore to be emitted on some ELF targets). For ease of use,
7038 we treat such symbols as local. */
7039 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
7046 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
7047 asymbol *symbol ATTRIBUTE_UNUSED)
7054 _bfd_elf_set_arch_mach (bfd *abfd,
7055 enum bfd_architecture arch,
7056 unsigned long machine)
7058 /* If this isn't the right architecture for this backend, and this
7059 isn't the generic backend, fail. */
7060 if (arch != get_elf_backend_data (abfd)->arch
7061 && arch != bfd_arch_unknown
7062 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
7065 return bfd_default_set_arch_mach (abfd, arch, machine);
7068 /* Find the function to a particular section and offset,
7069 for error reporting. */
7072 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
7076 const char **filename_ptr,
7077 const char **functionname_ptr)
7079 const char *filename;
7080 asymbol *func, *file;
7083 /* ??? Given multiple file symbols, it is impossible to reliably
7084 choose the right file name for global symbols. File symbols are
7085 local symbols, and thus all file symbols must sort before any
7086 global symbols. The ELF spec may be interpreted to say that a
7087 file symbol must sort before other local symbols, but currently
7088 ld -r doesn't do this. So, for ld -r output, it is possible to
7089 make a better choice of file name for local symbols by ignoring
7090 file symbols appearing after a given local symbol. */
7091 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
7097 state = nothing_seen;
7099 for (p = symbols; *p != NULL; p++)
7103 q = (elf_symbol_type *) *p;
7105 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
7111 if (state == symbol_seen)
7112 state = file_after_symbol_seen;
7116 if (bfd_get_section (&q->symbol) == section
7117 && q->symbol.value >= low_func
7118 && q->symbol.value <= offset)
7120 func = (asymbol *) q;
7121 low_func = q->symbol.value;
7124 && (ELF_ST_BIND (q->internal_elf_sym.st_info) == STB_LOCAL
7125 || state != file_after_symbol_seen))
7126 filename = bfd_asymbol_name (file);
7130 if (state == nothing_seen)
7131 state = symbol_seen;
7138 *filename_ptr = filename;
7139 if (functionname_ptr)
7140 *functionname_ptr = bfd_asymbol_name (func);
7145 /* Find the nearest line to a particular section and offset,
7146 for error reporting. */
7149 _bfd_elf_find_nearest_line (bfd *abfd,
7153 const char **filename_ptr,
7154 const char **functionname_ptr,
7155 unsigned int *line_ptr)
7159 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
7160 filename_ptr, functionname_ptr,
7163 if (!*functionname_ptr)
7164 elf_find_function (abfd, section, symbols, offset,
7165 *filename_ptr ? NULL : filename_ptr,
7171 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
7172 filename_ptr, functionname_ptr,
7174 &elf_tdata (abfd)->dwarf2_find_line_info))
7176 if (!*functionname_ptr)
7177 elf_find_function (abfd, section, symbols, offset,
7178 *filename_ptr ? NULL : filename_ptr,
7184 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7185 &found, filename_ptr,
7186 functionname_ptr, line_ptr,
7187 &elf_tdata (abfd)->line_info))
7189 if (found && (*functionname_ptr || *line_ptr))
7192 if (symbols == NULL)
7195 if (! elf_find_function (abfd, section, symbols, offset,
7196 filename_ptr, functionname_ptr))
7203 /* Find the line for a symbol. */
7206 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
7207 const char **filename_ptr, unsigned int *line_ptr)
7209 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
7210 filename_ptr, line_ptr, 0,
7211 &elf_tdata (abfd)->dwarf2_find_line_info);
7214 /* After a call to bfd_find_nearest_line, successive calls to
7215 bfd_find_inliner_info can be used to get source information about
7216 each level of function inlining that terminated at the address
7217 passed to bfd_find_nearest_line. Currently this is only supported
7218 for DWARF2 with appropriate DWARF3 extensions. */
7221 _bfd_elf_find_inliner_info (bfd *abfd,
7222 const char **filename_ptr,
7223 const char **functionname_ptr,
7224 unsigned int *line_ptr)
7227 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7228 functionname_ptr, line_ptr,
7229 & elf_tdata (abfd)->dwarf2_find_line_info);
7234 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
7236 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7237 int ret = bed->s->sizeof_ehdr;
7239 if (!info->relocatable)
7241 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
7243 if (phdr_size == (bfd_size_type) -1)
7245 struct elf_segment_map *m;
7248 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
7249 phdr_size += bed->s->sizeof_phdr;
7252 phdr_size = get_program_header_size (abfd, info);
7255 elf_tdata (abfd)->program_header_size = phdr_size;
7263 _bfd_elf_set_section_contents (bfd *abfd,
7265 const void *location,
7267 bfd_size_type count)
7269 Elf_Internal_Shdr *hdr;
7272 if (! abfd->output_has_begun
7273 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7276 hdr = &elf_section_data (section)->this_hdr;
7277 pos = hdr->sh_offset + offset;
7278 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7279 || bfd_bwrite (location, count, abfd) != count)
7286 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7287 arelent *cache_ptr ATTRIBUTE_UNUSED,
7288 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7293 /* Try to convert a non-ELF reloc into an ELF one. */
7296 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7298 /* Check whether we really have an ELF howto. */
7300 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7302 bfd_reloc_code_real_type code;
7303 reloc_howto_type *howto;
7305 /* Alien reloc: Try to determine its type to replace it with an
7306 equivalent ELF reloc. */
7308 if (areloc->howto->pc_relative)
7310 switch (areloc->howto->bitsize)
7313 code = BFD_RELOC_8_PCREL;
7316 code = BFD_RELOC_12_PCREL;
7319 code = BFD_RELOC_16_PCREL;
7322 code = BFD_RELOC_24_PCREL;
7325 code = BFD_RELOC_32_PCREL;
7328 code = BFD_RELOC_64_PCREL;
7334 howto = bfd_reloc_type_lookup (abfd, code);
7336 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7338 if (howto->pcrel_offset)
7339 areloc->addend += areloc->address;
7341 areloc->addend -= areloc->address; /* addend is unsigned!! */
7346 switch (areloc->howto->bitsize)
7352 code = BFD_RELOC_14;
7355 code = BFD_RELOC_16;
7358 code = BFD_RELOC_26;
7361 code = BFD_RELOC_32;
7364 code = BFD_RELOC_64;
7370 howto = bfd_reloc_type_lookup (abfd, code);
7374 areloc->howto = howto;
7382 (*_bfd_error_handler)
7383 (_("%B: unsupported relocation type %s"),
7384 abfd, areloc->howto->name);
7385 bfd_set_error (bfd_error_bad_value);
7390 _bfd_elf_close_and_cleanup (bfd *abfd)
7392 if (bfd_get_format (abfd) == bfd_object)
7394 if (elf_tdata (abfd) != NULL && elf_shstrtab (abfd) != NULL)
7395 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7396 _bfd_dwarf2_cleanup_debug_info (abfd);
7399 return _bfd_generic_close_and_cleanup (abfd);
7402 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7403 in the relocation's offset. Thus we cannot allow any sort of sanity
7404 range-checking to interfere. There is nothing else to do in processing
7407 bfd_reloc_status_type
7408 _bfd_elf_rel_vtable_reloc_fn
7409 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7410 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7411 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7412 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7414 return bfd_reloc_ok;
7417 /* Elf core file support. Much of this only works on native
7418 toolchains, since we rely on knowing the
7419 machine-dependent procfs structure in order to pick
7420 out details about the corefile. */
7422 #ifdef HAVE_SYS_PROCFS_H
7423 # include <sys/procfs.h>
7426 /* FIXME: this is kinda wrong, but it's what gdb wants. */
7429 elfcore_make_pid (bfd *abfd)
7431 return ((elf_tdata (abfd)->core_lwpid << 16)
7432 + (elf_tdata (abfd)->core_pid));
7435 /* If there isn't a section called NAME, make one, using
7436 data from SECT. Note, this function will generate a
7437 reference to NAME, so you shouldn't deallocate or
7441 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7445 if (bfd_get_section_by_name (abfd, name) != NULL)
7448 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
7452 sect2->size = sect->size;
7453 sect2->filepos = sect->filepos;
7454 sect2->alignment_power = sect->alignment_power;
7458 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7459 actually creates up to two pseudosections:
7460 - For the single-threaded case, a section named NAME, unless
7461 such a section already exists.
7462 - For the multi-threaded case, a section named "NAME/PID", where
7463 PID is elfcore_make_pid (abfd).
7464 Both pseudosections have identical contents. */
7466 _bfd_elfcore_make_pseudosection (bfd *abfd,
7472 char *threaded_name;
7476 /* Build the section name. */
7478 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7479 len = strlen (buf) + 1;
7480 threaded_name = bfd_alloc (abfd, len);
7481 if (threaded_name == NULL)
7483 memcpy (threaded_name, buf, len);
7485 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
7490 sect->filepos = filepos;
7491 sect->alignment_power = 2;
7493 return elfcore_maybe_make_sect (abfd, name, sect);
7496 /* prstatus_t exists on:
7498 linux 2.[01] + glibc
7502 #if defined (HAVE_PRSTATUS_T)
7505 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7510 if (note->descsz == sizeof (prstatus_t))
7514 size = sizeof (prstat.pr_reg);
7515 offset = offsetof (prstatus_t, pr_reg);
7516 memcpy (&prstat, note->descdata, sizeof (prstat));
7518 /* Do not overwrite the core signal if it
7519 has already been set by another thread. */
7520 if (elf_tdata (abfd)->core_signal == 0)
7521 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7522 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7524 /* pr_who exists on:
7527 pr_who doesn't exist on:
7530 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7531 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7534 #if defined (HAVE_PRSTATUS32_T)
7535 else if (note->descsz == sizeof (prstatus32_t))
7537 /* 64-bit host, 32-bit corefile */
7538 prstatus32_t prstat;
7540 size = sizeof (prstat.pr_reg);
7541 offset = offsetof (prstatus32_t, pr_reg);
7542 memcpy (&prstat, note->descdata, sizeof (prstat));
7544 /* Do not overwrite the core signal if it
7545 has already been set by another thread. */
7546 if (elf_tdata (abfd)->core_signal == 0)
7547 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7548 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7550 /* pr_who exists on:
7553 pr_who doesn't exist on:
7556 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7557 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7560 #endif /* HAVE_PRSTATUS32_T */
7563 /* Fail - we don't know how to handle any other
7564 note size (ie. data object type). */
7568 /* Make a ".reg/999" section and a ".reg" section. */
7569 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7570 size, note->descpos + offset);
7572 #endif /* defined (HAVE_PRSTATUS_T) */
7574 /* Create a pseudosection containing the exact contents of NOTE. */
7576 elfcore_make_note_pseudosection (bfd *abfd,
7578 Elf_Internal_Note *note)
7580 return _bfd_elfcore_make_pseudosection (abfd, name,
7581 note->descsz, note->descpos);
7584 /* There isn't a consistent prfpregset_t across platforms,
7585 but it doesn't matter, because we don't have to pick this
7586 data structure apart. */
7589 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7591 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7594 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7595 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7599 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7601 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7604 #if defined (HAVE_PRPSINFO_T)
7605 typedef prpsinfo_t elfcore_psinfo_t;
7606 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7607 typedef prpsinfo32_t elfcore_psinfo32_t;
7611 #if defined (HAVE_PSINFO_T)
7612 typedef psinfo_t elfcore_psinfo_t;
7613 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7614 typedef psinfo32_t elfcore_psinfo32_t;
7618 /* return a malloc'ed copy of a string at START which is at
7619 most MAX bytes long, possibly without a terminating '\0'.
7620 the copy will always have a terminating '\0'. */
7623 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7626 char *end = memchr (start, '\0', max);
7634 dups = bfd_alloc (abfd, len + 1);
7638 memcpy (dups, start, len);
7644 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7646 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7648 if (note->descsz == sizeof (elfcore_psinfo_t))
7650 elfcore_psinfo_t psinfo;
7652 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7654 elf_tdata (abfd)->core_program
7655 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7656 sizeof (psinfo.pr_fname));
7658 elf_tdata (abfd)->core_command
7659 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7660 sizeof (psinfo.pr_psargs));
7662 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7663 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7665 /* 64-bit host, 32-bit corefile */
7666 elfcore_psinfo32_t psinfo;
7668 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7670 elf_tdata (abfd)->core_program
7671 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7672 sizeof (psinfo.pr_fname));
7674 elf_tdata (abfd)->core_command
7675 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7676 sizeof (psinfo.pr_psargs));
7682 /* Fail - we don't know how to handle any other
7683 note size (ie. data object type). */
7687 /* Note that for some reason, a spurious space is tacked
7688 onto the end of the args in some (at least one anyway)
7689 implementations, so strip it off if it exists. */
7692 char *command = elf_tdata (abfd)->core_command;
7693 int n = strlen (command);
7695 if (0 < n && command[n - 1] == ' ')
7696 command[n - 1] = '\0';
7701 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7703 #if defined (HAVE_PSTATUS_T)
7705 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7707 if (note->descsz == sizeof (pstatus_t)
7708 #if defined (HAVE_PXSTATUS_T)
7709 || note->descsz == sizeof (pxstatus_t)
7715 memcpy (&pstat, note->descdata, sizeof (pstat));
7717 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7719 #if defined (HAVE_PSTATUS32_T)
7720 else if (note->descsz == sizeof (pstatus32_t))
7722 /* 64-bit host, 32-bit corefile */
7725 memcpy (&pstat, note->descdata, sizeof (pstat));
7727 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7730 /* Could grab some more details from the "representative"
7731 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7732 NT_LWPSTATUS note, presumably. */
7736 #endif /* defined (HAVE_PSTATUS_T) */
7738 #if defined (HAVE_LWPSTATUS_T)
7740 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7742 lwpstatus_t lwpstat;
7748 if (note->descsz != sizeof (lwpstat)
7749 #if defined (HAVE_LWPXSTATUS_T)
7750 && note->descsz != sizeof (lwpxstatus_t)
7755 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7757 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7758 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7760 /* Make a ".reg/999" section. */
7762 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7763 len = strlen (buf) + 1;
7764 name = bfd_alloc (abfd, len);
7767 memcpy (name, buf, len);
7769 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7773 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7774 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7775 sect->filepos = note->descpos
7776 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7779 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7780 sect->size = sizeof (lwpstat.pr_reg);
7781 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7784 sect->alignment_power = 2;
7786 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7789 /* Make a ".reg2/999" section */
7791 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7792 len = strlen (buf) + 1;
7793 name = bfd_alloc (abfd, len);
7796 memcpy (name, buf, len);
7798 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7802 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7803 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7804 sect->filepos = note->descpos
7805 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7808 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7809 sect->size = sizeof (lwpstat.pr_fpreg);
7810 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7813 sect->alignment_power = 2;
7815 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7817 #endif /* defined (HAVE_LWPSTATUS_T) */
7819 #if defined (HAVE_WIN32_PSTATUS_T)
7821 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7827 win32_pstatus_t pstatus;
7829 if (note->descsz < sizeof (pstatus))
7832 memcpy (&pstatus, note->descdata, sizeof (pstatus));
7834 switch (pstatus.data_type)
7836 case NOTE_INFO_PROCESS:
7837 /* FIXME: need to add ->core_command. */
7838 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
7839 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
7842 case NOTE_INFO_THREAD:
7843 /* Make a ".reg/999" section. */
7844 sprintf (buf, ".reg/%ld", (long) pstatus.data.thread_info.tid);
7846 len = strlen (buf) + 1;
7847 name = bfd_alloc (abfd, len);
7851 memcpy (name, buf, len);
7853 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7857 sect->size = sizeof (pstatus.data.thread_info.thread_context);
7858 sect->filepos = (note->descpos
7859 + offsetof (struct win32_pstatus,
7860 data.thread_info.thread_context));
7861 sect->alignment_power = 2;
7863 if (pstatus.data.thread_info.is_active_thread)
7864 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7868 case NOTE_INFO_MODULE:
7869 /* Make a ".module/xxxxxxxx" section. */
7870 sprintf (buf, ".module/%08lx",
7871 (long) pstatus.data.module_info.base_address);
7873 len = strlen (buf) + 1;
7874 name = bfd_alloc (abfd, len);
7878 memcpy (name, buf, len);
7880 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7885 sect->size = note->descsz;
7886 sect->filepos = note->descpos;
7887 sect->alignment_power = 2;
7896 #endif /* HAVE_WIN32_PSTATUS_T */
7899 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7901 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7909 if (bed->elf_backend_grok_prstatus)
7910 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7912 #if defined (HAVE_PRSTATUS_T)
7913 return elfcore_grok_prstatus (abfd, note);
7918 #if defined (HAVE_PSTATUS_T)
7920 return elfcore_grok_pstatus (abfd, note);
7923 #if defined (HAVE_LWPSTATUS_T)
7925 return elfcore_grok_lwpstatus (abfd, note);
7928 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7929 return elfcore_grok_prfpreg (abfd, note);
7931 #if defined (HAVE_WIN32_PSTATUS_T)
7932 case NT_WIN32PSTATUS:
7933 return elfcore_grok_win32pstatus (abfd, note);
7936 case NT_PRXFPREG: /* Linux SSE extension */
7937 if (note->namesz == 6
7938 && strcmp (note->namedata, "LINUX") == 0)
7939 return elfcore_grok_prxfpreg (abfd, note);
7945 if (bed->elf_backend_grok_psinfo)
7946 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7948 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7949 return elfcore_grok_psinfo (abfd, note);
7956 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
7961 sect->size = note->descsz;
7962 sect->filepos = note->descpos;
7963 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7971 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
7975 cp = strchr (note->namedata, '@');
7978 *lwpidp = atoi(cp + 1);
7985 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
7988 /* Signal number at offset 0x08. */
7989 elf_tdata (abfd)->core_signal
7990 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7992 /* Process ID at offset 0x50. */
7993 elf_tdata (abfd)->core_pid
7994 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7996 /* Command name at 0x7c (max 32 bytes, including nul). */
7997 elf_tdata (abfd)->core_command
7998 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
8000 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
8005 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
8009 if (elfcore_netbsd_get_lwpid (note, &lwp))
8010 elf_tdata (abfd)->core_lwpid = lwp;
8012 if (note->type == NT_NETBSDCORE_PROCINFO)
8014 /* NetBSD-specific core "procinfo". Note that we expect to
8015 find this note before any of the others, which is fine,
8016 since the kernel writes this note out first when it
8017 creates a core file. */
8019 return elfcore_grok_netbsd_procinfo (abfd, note);
8022 /* As of Jan 2002 there are no other machine-independent notes
8023 defined for NetBSD core files. If the note type is less
8024 than the start of the machine-dependent note types, we don't
8027 if (note->type < NT_NETBSDCORE_FIRSTMACH)
8031 switch (bfd_get_arch (abfd))
8033 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
8034 PT_GETFPREGS == mach+2. */
8036 case bfd_arch_alpha:
8037 case bfd_arch_sparc:
8040 case NT_NETBSDCORE_FIRSTMACH+0:
8041 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8043 case NT_NETBSDCORE_FIRSTMACH+2:
8044 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8050 /* On all other arch's, PT_GETREGS == mach+1 and
8051 PT_GETFPREGS == mach+3. */
8056 case NT_NETBSDCORE_FIRSTMACH+1:
8057 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8059 case NT_NETBSDCORE_FIRSTMACH+3:
8060 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8070 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
8072 void *ddata = note->descdata;
8079 /* nto_procfs_status 'pid' field is at offset 0. */
8080 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
8082 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
8083 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
8085 /* nto_procfs_status 'flags' field is at offset 8. */
8086 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
8088 /* nto_procfs_status 'what' field is at offset 14. */
8089 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
8091 elf_tdata (abfd)->core_signal = sig;
8092 elf_tdata (abfd)->core_lwpid = *tid;
8095 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
8096 do not come from signals so we make sure we set the current
8097 thread just in case. */
8098 if (flags & 0x00000080)
8099 elf_tdata (abfd)->core_lwpid = *tid;
8101 /* Make a ".qnx_core_status/%d" section. */
8102 sprintf (buf, ".qnx_core_status/%ld", *tid);
8104 name = bfd_alloc (abfd, strlen (buf) + 1);
8109 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8113 sect->size = note->descsz;
8114 sect->filepos = note->descpos;
8115 sect->alignment_power = 2;
8117 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
8121 elfcore_grok_nto_regs (bfd *abfd,
8122 Elf_Internal_Note *note,
8130 /* Make a "(base)/%d" section. */
8131 sprintf (buf, "%s/%ld", base, tid);
8133 name = bfd_alloc (abfd, strlen (buf) + 1);
8138 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8142 sect->size = note->descsz;
8143 sect->filepos = note->descpos;
8144 sect->alignment_power = 2;
8146 /* This is the current thread. */
8147 if (elf_tdata (abfd)->core_lwpid == tid)
8148 return elfcore_maybe_make_sect (abfd, base, sect);
8153 #define BFD_QNT_CORE_INFO 7
8154 #define BFD_QNT_CORE_STATUS 8
8155 #define BFD_QNT_CORE_GREG 9
8156 #define BFD_QNT_CORE_FPREG 10
8159 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
8161 /* Every GREG section has a STATUS section before it. Store the
8162 tid from the previous call to pass down to the next gregs
8164 static long tid = 1;
8168 case BFD_QNT_CORE_INFO:
8169 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
8170 case BFD_QNT_CORE_STATUS:
8171 return elfcore_grok_nto_status (abfd, note, &tid);
8172 case BFD_QNT_CORE_GREG:
8173 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
8174 case BFD_QNT_CORE_FPREG:
8175 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
8181 /* Function: elfcore_write_note
8184 buffer to hold note, and current size of buffer
8188 size of data for note
8190 Writes note to end of buffer. ELF64 notes are written exactly as
8191 for ELF32, despite the current (as of 2006) ELF gabi specifying
8192 that they ought to have 8-byte namesz and descsz field, and have
8193 8-byte alignment. Other writers, eg. Linux kernel, do the same.
8196 Pointer to realloc'd buffer, *BUFSIZ updated. */
8199 elfcore_write_note (bfd *abfd,
8207 Elf_External_Note *xnp;
8214 namesz = strlen (name) + 1;
8216 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
8218 buf = realloc (buf, *bufsiz + newspace);
8219 dest = buf + *bufsiz;
8220 *bufsiz += newspace;
8221 xnp = (Elf_External_Note *) dest;
8222 H_PUT_32 (abfd, namesz, xnp->namesz);
8223 H_PUT_32 (abfd, size, xnp->descsz);
8224 H_PUT_32 (abfd, type, xnp->type);
8228 memcpy (dest, name, namesz);
8236 memcpy (dest, input, size);
8246 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8248 elfcore_write_prpsinfo (bfd *abfd,
8254 const char *note_name = "CORE";
8255 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8257 if (bed->elf_backend_write_core_note != NULL)
8260 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8261 NT_PRPSINFO, fname, psargs);
8266 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8267 if (bed->s->elfclass == ELFCLASS32)
8269 #if defined (HAVE_PSINFO32_T)
8271 int note_type = NT_PSINFO;
8274 int note_type = NT_PRPSINFO;
8277 memset (&data, 0, sizeof (data));
8278 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8279 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8280 return elfcore_write_note (abfd, buf, bufsiz,
8281 note_name, note_type, &data, sizeof (data));
8286 #if defined (HAVE_PSINFO_T)
8288 int note_type = NT_PSINFO;
8291 int note_type = NT_PRPSINFO;
8294 memset (&data, 0, sizeof (data));
8295 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8296 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8297 return elfcore_write_note (abfd, buf, bufsiz,
8298 note_name, note_type, &data, sizeof (data));
8301 #endif /* PSINFO_T or PRPSINFO_T */
8303 #if defined (HAVE_PRSTATUS_T)
8305 elfcore_write_prstatus (bfd *abfd,
8312 const char *note_name = "CORE";
8313 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8315 if (bed->elf_backend_write_core_note != NULL)
8318 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8320 pid, cursig, gregs);
8325 #if defined (HAVE_PRSTATUS32_T)
8326 if (bed->s->elfclass == ELFCLASS32)
8328 prstatus32_t prstat;
8330 memset (&prstat, 0, sizeof (prstat));
8331 prstat.pr_pid = pid;
8332 prstat.pr_cursig = cursig;
8333 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8334 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8335 NT_PRSTATUS, &prstat, sizeof (prstat));
8342 memset (&prstat, 0, sizeof (prstat));
8343 prstat.pr_pid = pid;
8344 prstat.pr_cursig = cursig;
8345 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8346 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8347 NT_PRSTATUS, &prstat, sizeof (prstat));
8350 #endif /* HAVE_PRSTATUS_T */
8352 #if defined (HAVE_LWPSTATUS_T)
8354 elfcore_write_lwpstatus (bfd *abfd,
8361 lwpstatus_t lwpstat;
8362 const char *note_name = "CORE";
8364 memset (&lwpstat, 0, sizeof (lwpstat));
8365 lwpstat.pr_lwpid = pid >> 16;
8366 lwpstat.pr_cursig = cursig;
8367 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8368 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
8369 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8371 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
8372 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
8374 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
8375 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
8378 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8379 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
8381 #endif /* HAVE_LWPSTATUS_T */
8383 #if defined (HAVE_PSTATUS_T)
8385 elfcore_write_pstatus (bfd *abfd,
8389 int cursig ATTRIBUTE_UNUSED,
8390 const void *gregs ATTRIBUTE_UNUSED)
8392 const char *note_name = "CORE";
8393 #if defined (HAVE_PSTATUS32_T)
8394 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8396 if (bed->s->elfclass == ELFCLASS32)
8400 memset (&pstat, 0, sizeof (pstat));
8401 pstat.pr_pid = pid & 0xffff;
8402 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8403 NT_PSTATUS, &pstat, sizeof (pstat));
8411 memset (&pstat, 0, sizeof (pstat));
8412 pstat.pr_pid = pid & 0xffff;
8413 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8414 NT_PSTATUS, &pstat, sizeof (pstat));
8418 #endif /* HAVE_PSTATUS_T */
8421 elfcore_write_prfpreg (bfd *abfd,
8427 const char *note_name = "CORE";
8428 return elfcore_write_note (abfd, buf, bufsiz,
8429 note_name, NT_FPREGSET, fpregs, size);
8433 elfcore_write_prxfpreg (bfd *abfd,
8436 const void *xfpregs,
8439 char *note_name = "LINUX";
8440 return elfcore_write_note (abfd, buf, bufsiz,
8441 note_name, NT_PRXFPREG, xfpregs, size);
8445 elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
8453 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
8456 buf = bfd_malloc (size);
8460 if (bfd_bread (buf, size, abfd) != size)
8468 while (p < buf + size)
8470 /* FIXME: bad alignment assumption. */
8471 Elf_External_Note *xnp = (Elf_External_Note *) p;
8472 Elf_Internal_Note in;
8474 in.type = H_GET_32 (abfd, xnp->type);
8476 in.namesz = H_GET_32 (abfd, xnp->namesz);
8477 in.namedata = xnp->name;
8479 in.descsz = H_GET_32 (abfd, xnp->descsz);
8480 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
8481 in.descpos = offset + (in.descdata - buf);
8483 if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
8485 if (! elfcore_grok_netbsd_note (abfd, &in))
8488 else if (CONST_STRNEQ (in.namedata, "QNX"))
8490 if (! elfcore_grok_nto_note (abfd, &in))
8495 if (! elfcore_grok_note (abfd, &in))
8499 p = in.descdata + BFD_ALIGN (in.descsz, 4);
8506 /* Providing external access to the ELF program header table. */
8508 /* Return an upper bound on the number of bytes required to store a
8509 copy of ABFD's program header table entries. Return -1 if an error
8510 occurs; bfd_get_error will return an appropriate code. */
8513 bfd_get_elf_phdr_upper_bound (bfd *abfd)
8515 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8517 bfd_set_error (bfd_error_wrong_format);
8521 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
8524 /* Copy ABFD's program header table entries to *PHDRS. The entries
8525 will be stored as an array of Elf_Internal_Phdr structures, as
8526 defined in include/elf/internal.h. To find out how large the
8527 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8529 Return the number of program header table entries read, or -1 if an
8530 error occurs; bfd_get_error will return an appropriate code. */
8533 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
8537 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8539 bfd_set_error (bfd_error_wrong_format);
8543 num_phdrs = elf_elfheader (abfd)->e_phnum;
8544 memcpy (phdrs, elf_tdata (abfd)->phdr,
8545 num_phdrs * sizeof (Elf_Internal_Phdr));
8551 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
8554 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8556 i_ehdrp = elf_elfheader (abfd);
8557 if (i_ehdrp == NULL)
8558 sprintf_vma (buf, value);
8561 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8563 #if BFD_HOST_64BIT_LONG
8564 sprintf (buf, "%016lx", value);
8566 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
8567 _bfd_int64_low (value));
8571 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
8574 sprintf_vma (buf, value);
8579 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
8582 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8584 i_ehdrp = elf_elfheader (abfd);
8585 if (i_ehdrp == NULL)
8586 fprintf_vma ((FILE *) stream, value);
8589 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8591 #if BFD_HOST_64BIT_LONG
8592 fprintf ((FILE *) stream, "%016lx", value);
8594 fprintf ((FILE *) stream, "%08lx%08lx",
8595 _bfd_int64_high (value), _bfd_int64_low (value));
8599 fprintf ((FILE *) stream, "%08lx",
8600 (unsigned long) (value & 0xffffffff));
8603 fprintf_vma ((FILE *) stream, value);
8607 enum elf_reloc_type_class
8608 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
8610 return reloc_class_normal;
8613 /* For RELA architectures, return the relocation value for a
8614 relocation against a local symbol. */
8617 _bfd_elf_rela_local_sym (bfd *abfd,
8618 Elf_Internal_Sym *sym,
8620 Elf_Internal_Rela *rel)
8622 asection *sec = *psec;
8625 relocation = (sec->output_section->vma
8626 + sec->output_offset
8628 if ((sec->flags & SEC_MERGE)
8629 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
8630 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
8633 _bfd_merged_section_offset (abfd, psec,
8634 elf_section_data (sec)->sec_info,
8635 sym->st_value + rel->r_addend);
8638 /* If we have changed the section, and our original section is
8639 marked with SEC_EXCLUDE, it means that the original
8640 SEC_MERGE section has been completely subsumed in some
8641 other SEC_MERGE section. In this case, we need to leave
8642 some info around for --emit-relocs. */
8643 if ((sec->flags & SEC_EXCLUDE) != 0)
8644 sec->kept_section = *psec;
8647 rel->r_addend -= relocation;
8648 rel->r_addend += sec->output_section->vma + sec->output_offset;
8654 _bfd_elf_rel_local_sym (bfd *abfd,
8655 Elf_Internal_Sym *sym,
8659 asection *sec = *psec;
8661 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
8662 return sym->st_value + addend;
8664 return _bfd_merged_section_offset (abfd, psec,
8665 elf_section_data (sec)->sec_info,
8666 sym->st_value + addend);
8670 _bfd_elf_section_offset (bfd *abfd,
8671 struct bfd_link_info *info,
8675 switch (sec->sec_info_type)
8677 case ELF_INFO_TYPE_STABS:
8678 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
8680 case ELF_INFO_TYPE_EH_FRAME:
8681 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
8687 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8688 reconstruct an ELF file by reading the segments out of remote memory
8689 based on the ELF file header at EHDR_VMA and the ELF program headers it
8690 points to. If not null, *LOADBASEP is filled in with the difference
8691 between the VMAs from which the segments were read, and the VMAs the
8692 file headers (and hence BFD's idea of each section's VMA) put them at.
8694 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8695 remote memory at target address VMA into the local buffer at MYADDR; it
8696 should return zero on success or an `errno' code on failure. TEMPL must
8697 be a BFD for an ELF target with the word size and byte order found in
8698 the remote memory. */
8701 bfd_elf_bfd_from_remote_memory
8705 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
8707 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
8708 (templ, ehdr_vma, loadbasep, target_read_memory);
8712 _bfd_elf_get_synthetic_symtab (bfd *abfd,
8713 long symcount ATTRIBUTE_UNUSED,
8714 asymbol **syms ATTRIBUTE_UNUSED,
8719 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8722 const char *relplt_name;
8723 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8727 Elf_Internal_Shdr *hdr;
8733 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
8736 if (dynsymcount <= 0)
8739 if (!bed->plt_sym_val)
8742 relplt_name = bed->relplt_name;
8743 if (relplt_name == NULL)
8744 relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
8745 relplt = bfd_get_section_by_name (abfd, relplt_name);
8749 hdr = &elf_section_data (relplt)->this_hdr;
8750 if (hdr->sh_link != elf_dynsymtab (abfd)
8751 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
8754 plt = bfd_get_section_by_name (abfd, ".plt");
8758 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8759 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
8762 count = relplt->size / hdr->sh_entsize;
8763 size = count * sizeof (asymbol);
8764 p = relplt->relocation;
8765 for (i = 0; i < count; i++, s++, p++)
8766 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
8768 s = *ret = bfd_malloc (size);
8772 names = (char *) (s + count);
8773 p = relplt->relocation;
8775 for (i = 0; i < count; i++, s++, p++)
8780 addr = bed->plt_sym_val (i, plt, p);
8781 if (addr == (bfd_vma) -1)
8784 *s = **p->sym_ptr_ptr;
8785 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8786 we are defining a symbol, ensure one of them is set. */
8787 if ((s->flags & BSF_LOCAL) == 0)
8788 s->flags |= BSF_GLOBAL;
8790 s->value = addr - plt->vma;
8792 len = strlen ((*p->sym_ptr_ptr)->name);
8793 memcpy (names, (*p->sym_ptr_ptr)->name, len);
8795 memcpy (names, "@plt", sizeof ("@plt"));
8796 names += sizeof ("@plt");
8803 struct elf_symbuf_symbol
8805 unsigned long st_name; /* Symbol name, index in string tbl */
8806 unsigned char st_info; /* Type and binding attributes */
8807 unsigned char st_other; /* Visibilty, and target specific */
8810 struct elf_symbuf_head
8812 struct elf_symbuf_symbol *ssym;
8813 bfd_size_type count;
8814 unsigned int st_shndx;
8821 Elf_Internal_Sym *isym;
8822 struct elf_symbuf_symbol *ssym;
8827 /* Sort references to symbols by ascending section number. */
8830 elf_sort_elf_symbol (const void *arg1, const void *arg2)
8832 const Elf_Internal_Sym *s1 = *(const Elf_Internal_Sym **) arg1;
8833 const Elf_Internal_Sym *s2 = *(const Elf_Internal_Sym **) arg2;
8835 return s1->st_shndx - s2->st_shndx;
8839 elf_sym_name_compare (const void *arg1, const void *arg2)
8841 const struct elf_symbol *s1 = (const struct elf_symbol *) arg1;
8842 const struct elf_symbol *s2 = (const struct elf_symbol *) arg2;
8843 return strcmp (s1->name, s2->name);
8846 static struct elf_symbuf_head *
8847 elf_create_symbuf (bfd_size_type symcount, Elf_Internal_Sym *isymbuf)
8849 Elf_Internal_Sym **ind, **indbufend, **indbuf
8850 = bfd_malloc2 (symcount, sizeof (*indbuf));
8851 struct elf_symbuf_symbol *ssym;
8852 struct elf_symbuf_head *ssymbuf, *ssymhead;
8853 bfd_size_type i, shndx_count;
8858 for (ind = indbuf, i = 0; i < symcount; i++)
8859 if (isymbuf[i].st_shndx != SHN_UNDEF)
8860 *ind++ = &isymbuf[i];
8863 qsort (indbuf, indbufend - indbuf, sizeof (Elf_Internal_Sym *),
8864 elf_sort_elf_symbol);
8867 if (indbufend > indbuf)
8868 for (ind = indbuf, shndx_count++; ind < indbufend - 1; ind++)
8869 if (ind[0]->st_shndx != ind[1]->st_shndx)
8872 ssymbuf = bfd_malloc ((shndx_count + 1) * sizeof (*ssymbuf)
8873 + (indbufend - indbuf) * sizeof (*ssymbuf));
8874 if (ssymbuf == NULL)
8880 ssym = (struct elf_symbuf_symbol *) (ssymbuf + shndx_count);
8881 ssymbuf->ssym = NULL;
8882 ssymbuf->count = shndx_count;
8883 ssymbuf->st_shndx = 0;
8884 for (ssymhead = ssymbuf, ind = indbuf; ind < indbufend; ssym++, ind++)
8886 if (ind == indbuf || ssymhead->st_shndx != (*ind)->st_shndx)
8889 ssymhead->ssym = ssym;
8890 ssymhead->count = 0;
8891 ssymhead->st_shndx = (*ind)->st_shndx;
8893 ssym->st_name = (*ind)->st_name;
8894 ssym->st_info = (*ind)->st_info;
8895 ssym->st_other = (*ind)->st_other;
8898 BFD_ASSERT ((bfd_size_type) (ssymhead - ssymbuf) == shndx_count);
8904 /* Check if 2 sections define the same set of local and global
8908 bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2,
8909 struct bfd_link_info *info)
8912 const struct elf_backend_data *bed1, *bed2;
8913 Elf_Internal_Shdr *hdr1, *hdr2;
8914 bfd_size_type symcount1, symcount2;
8915 Elf_Internal_Sym *isymbuf1, *isymbuf2;
8916 struct elf_symbuf_head *ssymbuf1, *ssymbuf2;
8917 Elf_Internal_Sym *isym, *isymend;
8918 struct elf_symbol *symtable1 = NULL, *symtable2 = NULL;
8919 bfd_size_type count1, count2, i;
8926 /* If both are .gnu.linkonce sections, they have to have the same
8928 if (CONST_STRNEQ (sec1->name, ".gnu.linkonce")
8929 && CONST_STRNEQ (sec2->name, ".gnu.linkonce"))
8930 return strcmp (sec1->name + sizeof ".gnu.linkonce",
8931 sec2->name + sizeof ".gnu.linkonce") == 0;
8933 /* Both sections have to be in ELF. */
8934 if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour
8935 || bfd_get_flavour (bfd2) != bfd_target_elf_flavour)
8938 if (elf_section_type (sec1) != elf_section_type (sec2))
8941 if ((elf_section_flags (sec1) & SHF_GROUP) != 0
8942 && (elf_section_flags (sec2) & SHF_GROUP) != 0)
8944 /* If both are members of section groups, they have to have the
8946 if (strcmp (elf_group_name (sec1), elf_group_name (sec2)) != 0)
8950 shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1);
8951 shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2);
8952 if (shndx1 == -1 || shndx2 == -1)
8955 bed1 = get_elf_backend_data (bfd1);
8956 bed2 = get_elf_backend_data (bfd2);
8957 hdr1 = &elf_tdata (bfd1)->symtab_hdr;
8958 symcount1 = hdr1->sh_size / bed1->s->sizeof_sym;
8959 hdr2 = &elf_tdata (bfd2)->symtab_hdr;
8960 symcount2 = hdr2->sh_size / bed2->s->sizeof_sym;
8962 if (symcount1 == 0 || symcount2 == 0)
8968 ssymbuf1 = elf_tdata (bfd1)->symbuf;
8969 ssymbuf2 = elf_tdata (bfd2)->symbuf;
8971 if (ssymbuf1 == NULL)
8973 isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0,
8975 if (isymbuf1 == NULL)
8978 if (!info->reduce_memory_overheads)
8979 elf_tdata (bfd1)->symbuf = ssymbuf1
8980 = elf_create_symbuf (symcount1, isymbuf1);
8983 if (ssymbuf1 == NULL || ssymbuf2 == NULL)
8985 isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0,
8987 if (isymbuf2 == NULL)
8990 if (ssymbuf1 != NULL && !info->reduce_memory_overheads)
8991 elf_tdata (bfd2)->symbuf = ssymbuf2
8992 = elf_create_symbuf (symcount2, isymbuf2);
8995 if (ssymbuf1 != NULL && ssymbuf2 != NULL)
8997 /* Optimized faster version. */
8998 bfd_size_type lo, hi, mid;
8999 struct elf_symbol *symp;
9000 struct elf_symbuf_symbol *ssym, *ssymend;
9003 hi = ssymbuf1->count;
9008 mid = (lo + hi) / 2;
9009 if ((unsigned int) shndx1 < ssymbuf1[mid].st_shndx)
9011 else if ((unsigned int) shndx1 > ssymbuf1[mid].st_shndx)
9015 count1 = ssymbuf1[mid].count;
9022 hi = ssymbuf2->count;
9027 mid = (lo + hi) / 2;
9028 if ((unsigned int) shndx2 < ssymbuf2[mid].st_shndx)
9030 else if ((unsigned int) shndx2 > ssymbuf2[mid].st_shndx)
9034 count2 = ssymbuf2[mid].count;
9040 if (count1 == 0 || count2 == 0 || count1 != count2)
9043 symtable1 = bfd_malloc (count1 * sizeof (struct elf_symbol));
9044 symtable2 = bfd_malloc (count2 * sizeof (struct elf_symbol));
9045 if (symtable1 == NULL || symtable2 == NULL)
9049 for (ssym = ssymbuf1->ssym, ssymend = ssym + count1;
9050 ssym < ssymend; ssym++, symp++)
9052 symp->u.ssym = ssym;
9053 symp->name = bfd_elf_string_from_elf_section (bfd1,
9059 for (ssym = ssymbuf2->ssym, ssymend = ssym + count2;
9060 ssym < ssymend; ssym++, symp++)
9062 symp->u.ssym = ssym;
9063 symp->name = bfd_elf_string_from_elf_section (bfd2,
9068 /* Sort symbol by name. */
9069 qsort (symtable1, count1, sizeof (struct elf_symbol),
9070 elf_sym_name_compare);
9071 qsort (symtable2, count1, sizeof (struct elf_symbol),
9072 elf_sym_name_compare);
9074 for (i = 0; i < count1; i++)
9075 /* Two symbols must have the same binding, type and name. */
9076 if (symtable1 [i].u.ssym->st_info != symtable2 [i].u.ssym->st_info
9077 || symtable1 [i].u.ssym->st_other != symtable2 [i].u.ssym->st_other
9078 || strcmp (symtable1 [i].name, symtable2 [i].name) != 0)
9085 symtable1 = bfd_malloc (symcount1 * sizeof (struct elf_symbol));
9086 symtable2 = bfd_malloc (symcount2 * sizeof (struct elf_symbol));
9087 if (symtable1 == NULL || symtable2 == NULL)
9090 /* Count definitions in the section. */
9092 for (isym = isymbuf1, isymend = isym + symcount1; isym < isymend; isym++)
9093 if (isym->st_shndx == (unsigned int) shndx1)
9094 symtable1[count1++].u.isym = isym;
9097 for (isym = isymbuf2, isymend = isym + symcount2; isym < isymend; isym++)
9098 if (isym->st_shndx == (unsigned int) shndx2)
9099 symtable2[count2++].u.isym = isym;
9101 if (count1 == 0 || count2 == 0 || count1 != count2)
9104 for (i = 0; i < count1; i++)
9106 = bfd_elf_string_from_elf_section (bfd1, hdr1->sh_link,
9107 symtable1[i].u.isym->st_name);
9109 for (i = 0; i < count2; i++)
9111 = bfd_elf_string_from_elf_section (bfd2, hdr2->sh_link,
9112 symtable2[i].u.isym->st_name);
9114 /* Sort symbol by name. */
9115 qsort (symtable1, count1, sizeof (struct elf_symbol),
9116 elf_sym_name_compare);
9117 qsort (symtable2, count1, sizeof (struct elf_symbol),
9118 elf_sym_name_compare);
9120 for (i = 0; i < count1; i++)
9121 /* Two symbols must have the same binding, type and name. */
9122 if (symtable1 [i].u.isym->st_info != symtable2 [i].u.isym->st_info
9123 || symtable1 [i].u.isym->st_other != symtable2 [i].u.isym->st_other
9124 || strcmp (symtable1 [i].name, symtable2 [i].name) != 0)
9142 /* It is only used by x86-64 so far. */
9143 asection _bfd_elf_large_com_section
9144 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
9145 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
9147 /* Return TRUE if 2 section types are compatible. */
9150 _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec,
9151 bfd *bbfd, const asection *bsec)
9155 || abfd->xvec->flavour != bfd_target_elf_flavour
9156 || bbfd->xvec->flavour != bfd_target_elf_flavour)
9159 return elf_section_type (asec) == elf_section_type (bsec);
9163 _bfd_elf_set_osabi (bfd * abfd,
9164 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
9166 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
9168 i_ehdrp = elf_elfheader (abfd);
9170 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
9174 /* Return TRUE for ELF symbol types that represent functions.
9175 This is the default version of this function, which is sufficient for
9176 most targets. It returns true if TYPE is STT_FUNC. */
9179 _bfd_elf_is_function_type (unsigned int type)
9181 return (type == STT_FUNC);