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 3 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,
21 MA 02110-1301, USA. */
28 BFD support for ELF formats is being worked on.
29 Currently, the best supported back ends are for sparc and i386
30 (running svr4 or Solaris 2).
32 Documentation of the internals of the support code still needs
33 to be written. The code is changing quickly enough that we
34 haven't bothered yet. */
36 /* For sparc64-cross-sparc32. */
44 #include "libiberty.h"
45 #include "safe-ctype.h"
47 static int elf_sort_sections (const void *, const void *);
48 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
49 static bfd_boolean prep_headers (bfd *);
50 static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
51 static bfd_boolean elf_read_notes (bfd *, file_ptr, bfd_size_type) ;
52 static bfd_boolean elf_parse_notes (bfd *abfd, char *buf, size_t size,
55 /* Swap version information in and out. The version information is
56 currently size independent. If that ever changes, this code will
57 need to move into elfcode.h. */
59 /* Swap in a Verdef structure. */
62 _bfd_elf_swap_verdef_in (bfd *abfd,
63 const Elf_External_Verdef *src,
64 Elf_Internal_Verdef *dst)
66 dst->vd_version = H_GET_16 (abfd, src->vd_version);
67 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
68 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
69 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
70 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
71 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
72 dst->vd_next = H_GET_32 (abfd, src->vd_next);
75 /* Swap out a Verdef structure. */
78 _bfd_elf_swap_verdef_out (bfd *abfd,
79 const Elf_Internal_Verdef *src,
80 Elf_External_Verdef *dst)
82 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
83 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
84 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
85 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
86 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
87 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
88 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
91 /* Swap in a Verdaux structure. */
94 _bfd_elf_swap_verdaux_in (bfd *abfd,
95 const Elf_External_Verdaux *src,
96 Elf_Internal_Verdaux *dst)
98 dst->vda_name = H_GET_32 (abfd, src->vda_name);
99 dst->vda_next = H_GET_32 (abfd, src->vda_next);
102 /* Swap out a Verdaux structure. */
105 _bfd_elf_swap_verdaux_out (bfd *abfd,
106 const Elf_Internal_Verdaux *src,
107 Elf_External_Verdaux *dst)
109 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
110 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
113 /* Swap in a Verneed structure. */
116 _bfd_elf_swap_verneed_in (bfd *abfd,
117 const Elf_External_Verneed *src,
118 Elf_Internal_Verneed *dst)
120 dst->vn_version = H_GET_16 (abfd, src->vn_version);
121 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
122 dst->vn_file = H_GET_32 (abfd, src->vn_file);
123 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
124 dst->vn_next = H_GET_32 (abfd, src->vn_next);
127 /* Swap out a Verneed structure. */
130 _bfd_elf_swap_verneed_out (bfd *abfd,
131 const Elf_Internal_Verneed *src,
132 Elf_External_Verneed *dst)
134 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
135 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
136 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
137 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
138 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
141 /* Swap in a Vernaux structure. */
144 _bfd_elf_swap_vernaux_in (bfd *abfd,
145 const Elf_External_Vernaux *src,
146 Elf_Internal_Vernaux *dst)
148 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
149 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
150 dst->vna_other = H_GET_16 (abfd, src->vna_other);
151 dst->vna_name = H_GET_32 (abfd, src->vna_name);
152 dst->vna_next = H_GET_32 (abfd, src->vna_next);
155 /* Swap out a Vernaux structure. */
158 _bfd_elf_swap_vernaux_out (bfd *abfd,
159 const Elf_Internal_Vernaux *src,
160 Elf_External_Vernaux *dst)
162 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
163 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
164 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
165 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
166 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
169 /* Swap in a Versym structure. */
172 _bfd_elf_swap_versym_in (bfd *abfd,
173 const Elf_External_Versym *src,
174 Elf_Internal_Versym *dst)
176 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
179 /* Swap out a Versym structure. */
182 _bfd_elf_swap_versym_out (bfd *abfd,
183 const Elf_Internal_Versym *src,
184 Elf_External_Versym *dst)
186 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
189 /* Standard ELF hash function. Do not change this function; you will
190 cause invalid hash tables to be generated. */
193 bfd_elf_hash (const char *namearg)
195 const unsigned char *name = (const unsigned char *) namearg;
200 while ((ch = *name++) != '\0')
203 if ((g = (h & 0xf0000000)) != 0)
206 /* The ELF ABI says `h &= ~g', but this is equivalent in
207 this case and on some machines one insn instead of two. */
211 return h & 0xffffffff;
214 /* DT_GNU_HASH hash function. Do not change this function; you will
215 cause invalid hash tables to be generated. */
218 bfd_elf_gnu_hash (const char *namearg)
220 const unsigned char *name = (const unsigned char *) namearg;
221 unsigned long h = 5381;
224 while ((ch = *name++) != '\0')
225 h = (h << 5) + h + ch;
226 return h & 0xffffffff;
230 bfd_elf_mkobject (bfd *abfd)
232 if (abfd->tdata.any == NULL)
234 abfd->tdata.any = bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
235 if (abfd->tdata.any == NULL)
239 elf_tdata (abfd)->program_header_size = (bfd_size_type) -1;
245 bfd_elf_mkcorefile (bfd *abfd)
247 /* I think this can be done just like an object file. */
248 return bfd_elf_mkobject (abfd);
252 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
254 Elf_Internal_Shdr **i_shdrp;
255 bfd_byte *shstrtab = NULL;
257 bfd_size_type shstrtabsize;
259 i_shdrp = elf_elfsections (abfd);
261 || shindex >= elf_numsections (abfd)
262 || i_shdrp[shindex] == 0)
265 shstrtab = i_shdrp[shindex]->contents;
266 if (shstrtab == NULL)
268 /* No cached one, attempt to read, and cache what we read. */
269 offset = i_shdrp[shindex]->sh_offset;
270 shstrtabsize = i_shdrp[shindex]->sh_size;
272 /* Allocate and clear an extra byte at the end, to prevent crashes
273 in case the string table is not terminated. */
274 if (shstrtabsize + 1 == 0
275 || (shstrtab = bfd_alloc (abfd, shstrtabsize + 1)) == NULL
276 || bfd_seek (abfd, offset, SEEK_SET) != 0)
278 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
280 if (bfd_get_error () != bfd_error_system_call)
281 bfd_set_error (bfd_error_file_truncated);
285 shstrtab[shstrtabsize] = '\0';
286 i_shdrp[shindex]->contents = shstrtab;
288 return (char *) shstrtab;
292 bfd_elf_string_from_elf_section (bfd *abfd,
293 unsigned int shindex,
294 unsigned int strindex)
296 Elf_Internal_Shdr *hdr;
301 if (elf_elfsections (abfd) == NULL || shindex >= elf_numsections (abfd))
304 hdr = elf_elfsections (abfd)[shindex];
306 if (hdr->contents == NULL
307 && bfd_elf_get_str_section (abfd, shindex) == NULL)
310 if (strindex >= hdr->sh_size)
312 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
313 (*_bfd_error_handler)
314 (_("%B: invalid string offset %u >= %lu for section `%s'"),
315 abfd, strindex, (unsigned long) hdr->sh_size,
316 (shindex == shstrndx && strindex == hdr->sh_name
318 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
322 return ((char *) hdr->contents) + strindex;
325 /* Read and convert symbols to internal format.
326 SYMCOUNT specifies the number of symbols to read, starting from
327 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
328 are non-NULL, they are used to store the internal symbols, external
329 symbols, and symbol section index extensions, respectively. */
332 bfd_elf_get_elf_syms (bfd *ibfd,
333 Elf_Internal_Shdr *symtab_hdr,
336 Elf_Internal_Sym *intsym_buf,
338 Elf_External_Sym_Shndx *extshndx_buf)
340 Elf_Internal_Shdr *shndx_hdr;
342 const bfd_byte *esym;
343 Elf_External_Sym_Shndx *alloc_extshndx;
344 Elf_External_Sym_Shndx *shndx;
345 Elf_Internal_Sym *isym;
346 Elf_Internal_Sym *isymend;
347 const struct elf_backend_data *bed;
355 /* Normal syms might have section extension entries. */
357 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
358 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
360 /* Read the symbols. */
362 alloc_extshndx = NULL;
363 bed = get_elf_backend_data (ibfd);
364 extsym_size = bed->s->sizeof_sym;
365 amt = symcount * extsym_size;
366 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
367 if (extsym_buf == NULL)
369 alloc_ext = bfd_malloc2 (symcount, extsym_size);
370 extsym_buf = alloc_ext;
372 if (extsym_buf == NULL
373 || bfd_seek (ibfd, pos, SEEK_SET) != 0
374 || bfd_bread (extsym_buf, amt, ibfd) != amt)
380 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
384 amt = symcount * sizeof (Elf_External_Sym_Shndx);
385 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
386 if (extshndx_buf == NULL)
388 alloc_extshndx = bfd_malloc2 (symcount,
389 sizeof (Elf_External_Sym_Shndx));
390 extshndx_buf = alloc_extshndx;
392 if (extshndx_buf == NULL
393 || bfd_seek (ibfd, pos, SEEK_SET) != 0
394 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
401 if (intsym_buf == NULL)
403 intsym_buf = bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
404 if (intsym_buf == NULL)
408 /* Convert the symbols to internal form. */
409 isymend = intsym_buf + symcount;
410 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
412 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
413 if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym))
415 symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size;
416 (*_bfd_error_handler) (_("%B symbol number %lu references "
417 "nonexistent SHT_SYMTAB_SHNDX section"),
418 ibfd, (unsigned long) symoffset);
424 if (alloc_ext != NULL)
426 if (alloc_extshndx != NULL)
427 free (alloc_extshndx);
432 /* Look up a symbol name. */
434 bfd_elf_sym_name (bfd *abfd,
435 Elf_Internal_Shdr *symtab_hdr,
436 Elf_Internal_Sym *isym,
440 unsigned int iname = isym->st_name;
441 unsigned int shindex = symtab_hdr->sh_link;
443 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
444 /* Check for a bogus st_shndx to avoid crashing. */
445 && isym->st_shndx < elf_numsections (abfd)
446 && !(isym->st_shndx >= SHN_LORESERVE && isym->st_shndx <= SHN_HIRESERVE))
448 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
449 shindex = elf_elfheader (abfd)->e_shstrndx;
452 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
455 else if (sym_sec && *name == '\0')
456 name = bfd_section_name (abfd, sym_sec);
461 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
462 sections. The first element is the flags, the rest are section
465 typedef union elf_internal_group {
466 Elf_Internal_Shdr *shdr;
468 } Elf_Internal_Group;
470 /* Return the name of the group signature symbol. Why isn't the
471 signature just a string? */
474 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
476 Elf_Internal_Shdr *hdr;
477 unsigned char esym[sizeof (Elf64_External_Sym)];
478 Elf_External_Sym_Shndx eshndx;
479 Elf_Internal_Sym isym;
481 /* First we need to ensure the symbol table is available. Make sure
482 that it is a symbol table section. */
483 hdr = elf_elfsections (abfd) [ghdr->sh_link];
484 if (hdr->sh_type != SHT_SYMTAB
485 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
488 /* Go read the symbol. */
489 hdr = &elf_tdata (abfd)->symtab_hdr;
490 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
491 &isym, esym, &eshndx) == NULL)
494 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
497 /* Set next_in_group list pointer, and group name for NEWSECT. */
500 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
502 unsigned int num_group = elf_tdata (abfd)->num_group;
504 /* If num_group is zero, read in all SHT_GROUP sections. The count
505 is set to -1 if there are no SHT_GROUP sections. */
508 unsigned int i, shnum;
510 /* First count the number of groups. If we have a SHT_GROUP
511 section with just a flag word (ie. sh_size is 4), ignore it. */
512 shnum = elf_numsections (abfd);
515 #define IS_VALID_GROUP_SECTION_HEADER(shdr) \
516 ( (shdr)->sh_type == SHT_GROUP \
517 && (shdr)->sh_size >= (2 * GRP_ENTRY_SIZE) \
518 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
519 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
521 for (i = 0; i < shnum; i++)
523 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
525 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
531 num_group = (unsigned) -1;
532 elf_tdata (abfd)->num_group = num_group;
536 /* We keep a list of elf section headers for group sections,
537 so we can find them quickly. */
540 elf_tdata (abfd)->num_group = num_group;
541 elf_tdata (abfd)->group_sect_ptr
542 = bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
543 if (elf_tdata (abfd)->group_sect_ptr == NULL)
547 for (i = 0; i < shnum; i++)
549 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
551 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
554 Elf_Internal_Group *dest;
556 /* Add to list of sections. */
557 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
560 /* Read the raw contents. */
561 BFD_ASSERT (sizeof (*dest) >= 4);
562 amt = shdr->sh_size * sizeof (*dest) / 4;
563 shdr->contents = bfd_alloc2 (abfd, shdr->sh_size,
565 /* PR binutils/4110: Handle corrupt group headers. */
566 if (shdr->contents == NULL)
569 (_("%B: Corrupt size field in group section header: 0x%lx"), abfd, shdr->sh_size);
570 bfd_set_error (bfd_error_bad_value);
574 memset (shdr->contents, 0, amt);
576 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
577 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
581 /* Translate raw contents, a flag word followed by an
582 array of elf section indices all in target byte order,
583 to the flag word followed by an array of elf section
585 src = shdr->contents + shdr->sh_size;
586 dest = (Elf_Internal_Group *) (shdr->contents + amt);
593 idx = H_GET_32 (abfd, src);
594 if (src == shdr->contents)
597 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
598 shdr->bfd_section->flags
599 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
604 ((*_bfd_error_handler)
605 (_("%B: invalid SHT_GROUP entry"), abfd));
608 dest->shdr = elf_elfsections (abfd)[idx];
615 if (num_group != (unsigned) -1)
619 for (i = 0; i < num_group; i++)
621 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
622 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
623 unsigned int n_elt = shdr->sh_size / 4;
625 /* Look through this group's sections to see if current
626 section is a member. */
628 if ((++idx)->shdr == hdr)
632 /* We are a member of this group. Go looking through
633 other members to see if any others are linked via
635 idx = (Elf_Internal_Group *) shdr->contents;
636 n_elt = shdr->sh_size / 4;
638 if ((s = (++idx)->shdr->bfd_section) != NULL
639 && elf_next_in_group (s) != NULL)
643 /* Snarf the group name from other member, and
644 insert current section in circular list. */
645 elf_group_name (newsect) = elf_group_name (s);
646 elf_next_in_group (newsect) = elf_next_in_group (s);
647 elf_next_in_group (s) = newsect;
653 gname = group_signature (abfd, shdr);
656 elf_group_name (newsect) = gname;
658 /* Start a circular list with one element. */
659 elf_next_in_group (newsect) = newsect;
662 /* If the group section has been created, point to the
664 if (shdr->bfd_section != NULL)
665 elf_next_in_group (shdr->bfd_section) = newsect;
673 if (elf_group_name (newsect) == NULL)
675 (*_bfd_error_handler) (_("%B: no group info for section %A"),
682 _bfd_elf_setup_sections (bfd *abfd)
685 unsigned int num_group = elf_tdata (abfd)->num_group;
686 bfd_boolean result = TRUE;
689 /* Process SHF_LINK_ORDER. */
690 for (s = abfd->sections; s != NULL; s = s->next)
692 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
693 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
695 unsigned int elfsec = this_hdr->sh_link;
696 /* FIXME: The old Intel compiler and old strip/objcopy may
697 not set the sh_link or sh_info fields. Hence we could
698 get the situation where elfsec is 0. */
701 const struct elf_backend_data *bed
702 = get_elf_backend_data (abfd);
703 if (bed->link_order_error_handler)
704 bed->link_order_error_handler
705 (_("%B: warning: sh_link not set for section `%A'"),
712 this_hdr = elf_elfsections (abfd)[elfsec];
715 Some strip/objcopy may leave an incorrect value in
716 sh_link. We don't want to proceed. */
717 link = this_hdr->bfd_section;
720 (*_bfd_error_handler)
721 (_("%B: sh_link [%d] in section `%A' is incorrect"),
722 s->owner, s, elfsec);
726 elf_linked_to_section (s) = link;
731 /* Process section groups. */
732 if (num_group == (unsigned) -1)
735 for (i = 0; i < num_group; i++)
737 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
738 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
739 unsigned int n_elt = shdr->sh_size / 4;
742 if ((++idx)->shdr->bfd_section)
743 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
744 else if (idx->shdr->sh_type == SHT_RELA
745 || idx->shdr->sh_type == SHT_REL)
746 /* We won't include relocation sections in section groups in
747 output object files. We adjust the group section size here
748 so that relocatable link will work correctly when
749 relocation sections are in section group in input object
751 shdr->bfd_section->size -= 4;
754 /* There are some unknown sections in the group. */
755 (*_bfd_error_handler)
756 (_("%B: unknown [%d] section `%s' in group [%s]"),
758 (unsigned int) idx->shdr->sh_type,
759 bfd_elf_string_from_elf_section (abfd,
760 (elf_elfheader (abfd)
763 shdr->bfd_section->name);
771 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
773 return elf_next_in_group (sec) != NULL;
776 /* Make a BFD section from an ELF section. We store a pointer to the
777 BFD section in the bfd_section field of the header. */
780 _bfd_elf_make_section_from_shdr (bfd *abfd,
781 Elf_Internal_Shdr *hdr,
787 const struct elf_backend_data *bed;
789 if (hdr->bfd_section != NULL)
791 BFD_ASSERT (strcmp (name,
792 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
796 newsect = bfd_make_section_anyway (abfd, name);
800 hdr->bfd_section = newsect;
801 elf_section_data (newsect)->this_hdr = *hdr;
802 elf_section_data (newsect)->this_idx = shindex;
804 /* Always use the real type/flags. */
805 elf_section_type (newsect) = hdr->sh_type;
806 elf_section_flags (newsect) = hdr->sh_flags;
808 newsect->filepos = hdr->sh_offset;
810 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
811 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
812 || ! bfd_set_section_alignment (abfd, newsect,
813 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
816 flags = SEC_NO_FLAGS;
817 if (hdr->sh_type != SHT_NOBITS)
818 flags |= SEC_HAS_CONTENTS;
819 if (hdr->sh_type == SHT_GROUP)
820 flags |= SEC_GROUP | SEC_EXCLUDE;
821 if ((hdr->sh_flags & SHF_ALLOC) != 0)
824 if (hdr->sh_type != SHT_NOBITS)
827 if ((hdr->sh_flags & SHF_WRITE) == 0)
828 flags |= SEC_READONLY;
829 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
831 else if ((flags & SEC_LOAD) != 0)
833 if ((hdr->sh_flags & SHF_MERGE) != 0)
836 newsect->entsize = hdr->sh_entsize;
837 if ((hdr->sh_flags & SHF_STRINGS) != 0)
838 flags |= SEC_STRINGS;
840 if (hdr->sh_flags & SHF_GROUP)
841 if (!setup_group (abfd, hdr, newsect))
843 if ((hdr->sh_flags & SHF_TLS) != 0)
844 flags |= SEC_THREAD_LOCAL;
846 if ((flags & SEC_ALLOC) == 0)
848 /* The debugging sections appear to be recognized only by name,
849 not any sort of flag. Their SEC_ALLOC bits are cleared. */
854 } debug_sections [] =
856 { STRING_COMMA_LEN ("debug") }, /* 'd' */
857 { NULL, 0 }, /* 'e' */
858 { NULL, 0 }, /* 'f' */
859 { STRING_COMMA_LEN ("gnu.linkonce.wi.") }, /* 'g' */
860 { NULL, 0 }, /* 'h' */
861 { NULL, 0 }, /* 'i' */
862 { NULL, 0 }, /* 'j' */
863 { NULL, 0 }, /* 'k' */
864 { STRING_COMMA_LEN ("line") }, /* 'l' */
865 { NULL, 0 }, /* 'm' */
866 { NULL, 0 }, /* 'n' */
867 { NULL, 0 }, /* 'o' */
868 { NULL, 0 }, /* 'p' */
869 { NULL, 0 }, /* 'q' */
870 { NULL, 0 }, /* 'r' */
871 { STRING_COMMA_LEN ("stab") } /* 's' */
876 int i = name [1] - 'd';
878 && i < (int) ARRAY_SIZE (debug_sections)
879 && debug_sections [i].name != NULL
880 && strncmp (&name [1], debug_sections [i].name,
881 debug_sections [i].len) == 0)
882 flags |= SEC_DEBUGGING;
886 /* As a GNU extension, if the name begins with .gnu.linkonce, we
887 only link a single copy of the section. This is used to support
888 g++. g++ will emit each template expansion in its own section.
889 The symbols will be defined as weak, so that multiple definitions
890 are permitted. The GNU linker extension is to actually discard
891 all but one of the sections. */
892 if (CONST_STRNEQ (name, ".gnu.linkonce")
893 && elf_next_in_group (newsect) == NULL)
894 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
896 bed = get_elf_backend_data (abfd);
897 if (bed->elf_backend_section_flags)
898 if (! bed->elf_backend_section_flags (&flags, hdr))
901 if (! bfd_set_section_flags (abfd, newsect, flags))
904 /* We do not parse the PT_NOTE segments as we are interested even in the
905 separate debug info files which may have the segments offsets corrupted.
906 PT_NOTEs from the core files are currently not parsed using BFD. */
907 if (hdr->sh_type == SHT_NOTE)
911 contents = bfd_malloc (hdr->sh_size);
915 if (!bfd_get_section_contents (abfd, hdr->bfd_section, contents, 0,
917 || !elf_parse_notes (abfd, contents, hdr->sh_size, -1))
926 if ((flags & SEC_ALLOC) != 0)
928 Elf_Internal_Phdr *phdr;
931 /* Look through the phdrs to see if we need to adjust the lma.
932 If all the p_paddr fields are zero, we ignore them, since
933 some ELF linkers produce such output. */
934 phdr = elf_tdata (abfd)->phdr;
935 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
937 if (phdr->p_paddr != 0)
940 if (i < elf_elfheader (abfd)->e_phnum)
942 phdr = elf_tdata (abfd)->phdr;
943 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
945 /* This section is part of this segment if its file
946 offset plus size lies within the segment's memory
947 span and, if the section is loaded, the extent of the
948 loaded data lies within the extent of the segment.
950 Note - we used to check the p_paddr field as well, and
951 refuse to set the LMA if it was 0. This is wrong
952 though, as a perfectly valid initialised segment can
953 have a p_paddr of zero. Some architectures, eg ARM,
954 place special significance on the address 0 and
955 executables need to be able to have a segment which
956 covers this address. */
957 if (phdr->p_type == PT_LOAD
958 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
959 && (hdr->sh_offset + hdr->sh_size
960 <= phdr->p_offset + phdr->p_memsz)
961 && ((flags & SEC_LOAD) == 0
962 || (hdr->sh_offset + hdr->sh_size
963 <= phdr->p_offset + phdr->p_filesz)))
965 if ((flags & SEC_LOAD) == 0)
966 newsect->lma = (phdr->p_paddr
967 + hdr->sh_addr - phdr->p_vaddr);
969 /* We used to use the same adjustment for SEC_LOAD
970 sections, but that doesn't work if the segment
971 is packed with code from multiple VMAs.
972 Instead we calculate the section LMA based on
973 the segment LMA. It is assumed that the
974 segment will contain sections with contiguous
975 LMAs, even if the VMAs are not. */
976 newsect->lma = (phdr->p_paddr
977 + hdr->sh_offset - phdr->p_offset);
979 /* With contiguous segments, we can't tell from file
980 offsets whether a section with zero size should
981 be placed at the end of one segment or the
982 beginning of the next. Decide based on vaddr. */
983 if (hdr->sh_addr >= phdr->p_vaddr
984 && (hdr->sh_addr + hdr->sh_size
985 <= phdr->p_vaddr + phdr->p_memsz))
1000 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
1003 Helper functions for GDB to locate the string tables.
1004 Since BFD hides string tables from callers, GDB needs to use an
1005 internal hook to find them. Sun's .stabstr, in particular,
1006 isn't even pointed to by the .stab section, so ordinary
1007 mechanisms wouldn't work to find it, even if we had some.
1010 struct elf_internal_shdr *
1011 bfd_elf_find_section (bfd *abfd, char *name)
1013 Elf_Internal_Shdr **i_shdrp;
1018 i_shdrp = elf_elfsections (abfd);
1019 if (i_shdrp != NULL)
1021 shstrtab = bfd_elf_get_str_section (abfd,
1022 elf_elfheader (abfd)->e_shstrndx);
1023 if (shstrtab != NULL)
1025 max = elf_numsections (abfd);
1026 for (i = 1; i < max; i++)
1027 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
1034 const char *const bfd_elf_section_type_names[] = {
1035 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1036 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1037 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1040 /* ELF relocs are against symbols. If we are producing relocatable
1041 output, and the reloc is against an external symbol, and nothing
1042 has given us any additional addend, the resulting reloc will also
1043 be against the same symbol. In such a case, we don't want to
1044 change anything about the way the reloc is handled, since it will
1045 all be done at final link time. Rather than put special case code
1046 into bfd_perform_relocation, all the reloc types use this howto
1047 function. It just short circuits the reloc if producing
1048 relocatable output against an external symbol. */
1050 bfd_reloc_status_type
1051 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1052 arelent *reloc_entry,
1054 void *data ATTRIBUTE_UNUSED,
1055 asection *input_section,
1057 char **error_message ATTRIBUTE_UNUSED)
1059 if (output_bfd != NULL
1060 && (symbol->flags & BSF_SECTION_SYM) == 0
1061 && (! reloc_entry->howto->partial_inplace
1062 || reloc_entry->addend == 0))
1064 reloc_entry->address += input_section->output_offset;
1065 return bfd_reloc_ok;
1068 return bfd_reloc_continue;
1071 /* Copy the program header and other data from one object module to
1075 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1077 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1078 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1081 BFD_ASSERT (!elf_flags_init (obfd)
1082 || (elf_elfheader (obfd)->e_flags
1083 == elf_elfheader (ibfd)->e_flags));
1085 elf_gp (obfd) = elf_gp (ibfd);
1086 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1087 elf_flags_init (obfd) = TRUE;
1089 /* Copy object attributes. */
1090 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1096 get_segment_type (unsigned int p_type)
1101 case PT_NULL: pt = "NULL"; break;
1102 case PT_LOAD: pt = "LOAD"; break;
1103 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1104 case PT_INTERP: pt = "INTERP"; break;
1105 case PT_NOTE: pt = "NOTE"; break;
1106 case PT_SHLIB: pt = "SHLIB"; break;
1107 case PT_PHDR: pt = "PHDR"; break;
1108 case PT_TLS: pt = "TLS"; break;
1109 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1110 case PT_GNU_STACK: pt = "STACK"; break;
1111 case PT_GNU_RELRO: pt = "RELRO"; break;
1112 default: pt = NULL; break;
1117 /* Print out the program headers. */
1120 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1123 Elf_Internal_Phdr *p;
1125 bfd_byte *dynbuf = NULL;
1127 p = elf_tdata (abfd)->phdr;
1132 fprintf (f, _("\nProgram Header:\n"));
1133 c = elf_elfheader (abfd)->e_phnum;
1134 for (i = 0; i < c; i++, p++)
1136 const char *pt = get_segment_type (p->p_type);
1141 sprintf (buf, "0x%lx", p->p_type);
1144 fprintf (f, "%8s off 0x", pt);
1145 bfd_fprintf_vma (abfd, f, p->p_offset);
1146 fprintf (f, " vaddr 0x");
1147 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1148 fprintf (f, " paddr 0x");
1149 bfd_fprintf_vma (abfd, f, p->p_paddr);
1150 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1151 fprintf (f, " filesz 0x");
1152 bfd_fprintf_vma (abfd, f, p->p_filesz);
1153 fprintf (f, " memsz 0x");
1154 bfd_fprintf_vma (abfd, f, p->p_memsz);
1155 fprintf (f, " flags %c%c%c",
1156 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1157 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1158 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1159 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1160 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1165 s = bfd_get_section_by_name (abfd, ".dynamic");
1169 unsigned long shlink;
1170 bfd_byte *extdyn, *extdynend;
1172 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1174 fprintf (f, _("\nDynamic Section:\n"));
1176 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1179 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1182 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1184 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1185 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1188 extdynend = extdyn + s->size;
1189 for (; extdyn < extdynend; extdyn += extdynsize)
1191 Elf_Internal_Dyn dyn;
1194 bfd_boolean stringp;
1196 (*swap_dyn_in) (abfd, extdyn, &dyn);
1198 if (dyn.d_tag == DT_NULL)
1205 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1209 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1210 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1211 case DT_PLTGOT: name = "PLTGOT"; break;
1212 case DT_HASH: name = "HASH"; break;
1213 case DT_STRTAB: name = "STRTAB"; break;
1214 case DT_SYMTAB: name = "SYMTAB"; break;
1215 case DT_RELA: name = "RELA"; break;
1216 case DT_RELASZ: name = "RELASZ"; break;
1217 case DT_RELAENT: name = "RELAENT"; break;
1218 case DT_STRSZ: name = "STRSZ"; break;
1219 case DT_SYMENT: name = "SYMENT"; break;
1220 case DT_INIT: name = "INIT"; break;
1221 case DT_FINI: name = "FINI"; break;
1222 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1223 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1224 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1225 case DT_REL: name = "REL"; break;
1226 case DT_RELSZ: name = "RELSZ"; break;
1227 case DT_RELENT: name = "RELENT"; break;
1228 case DT_PLTREL: name = "PLTREL"; break;
1229 case DT_DEBUG: name = "DEBUG"; break;
1230 case DT_TEXTREL: name = "TEXTREL"; break;
1231 case DT_JMPREL: name = "JMPREL"; break;
1232 case DT_BIND_NOW: name = "BIND_NOW"; break;
1233 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1234 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1235 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1236 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1237 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1238 case DT_FLAGS: name = "FLAGS"; break;
1239 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1240 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1241 case DT_CHECKSUM: name = "CHECKSUM"; break;
1242 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1243 case DT_MOVEENT: name = "MOVEENT"; break;
1244 case DT_MOVESZ: name = "MOVESZ"; break;
1245 case DT_FEATURE: name = "FEATURE"; break;
1246 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1247 case DT_SYMINSZ: name = "SYMINSZ"; break;
1248 case DT_SYMINENT: name = "SYMINENT"; break;
1249 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1250 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1251 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1252 case DT_PLTPAD: name = "PLTPAD"; break;
1253 case DT_MOVETAB: name = "MOVETAB"; break;
1254 case DT_SYMINFO: name = "SYMINFO"; break;
1255 case DT_RELACOUNT: name = "RELACOUNT"; break;
1256 case DT_RELCOUNT: name = "RELCOUNT"; break;
1257 case DT_FLAGS_1: name = "FLAGS_1"; break;
1258 case DT_VERSYM: name = "VERSYM"; break;
1259 case DT_VERDEF: name = "VERDEF"; break;
1260 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1261 case DT_VERNEED: name = "VERNEED"; break;
1262 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1263 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1264 case DT_USED: name = "USED"; break;
1265 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1266 case DT_GNU_HASH: name = "GNU_HASH"; break;
1269 fprintf (f, " %-11s ", name);
1271 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1275 unsigned int tagv = dyn.d_un.d_val;
1277 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1280 fprintf (f, "%s", string);
1289 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1290 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1292 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1296 if (elf_dynverdef (abfd) != 0)
1298 Elf_Internal_Verdef *t;
1300 fprintf (f, _("\nVersion definitions:\n"));
1301 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1303 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1304 t->vd_flags, t->vd_hash,
1305 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1306 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1308 Elf_Internal_Verdaux *a;
1311 for (a = t->vd_auxptr->vda_nextptr;
1315 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1321 if (elf_dynverref (abfd) != 0)
1323 Elf_Internal_Verneed *t;
1325 fprintf (f, _("\nVersion References:\n"));
1326 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1328 Elf_Internal_Vernaux *a;
1330 fprintf (f, _(" required from %s:\n"),
1331 t->vn_filename ? t->vn_filename : "<corrupt>");
1332 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1333 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1334 a->vna_flags, a->vna_other,
1335 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1347 /* Display ELF-specific fields of a symbol. */
1350 bfd_elf_print_symbol (bfd *abfd,
1353 bfd_print_symbol_type how)
1358 case bfd_print_symbol_name:
1359 fprintf (file, "%s", symbol->name);
1361 case bfd_print_symbol_more:
1362 fprintf (file, "elf ");
1363 bfd_fprintf_vma (abfd, file, symbol->value);
1364 fprintf (file, " %lx", (long) symbol->flags);
1366 case bfd_print_symbol_all:
1368 const char *section_name;
1369 const char *name = NULL;
1370 const struct elf_backend_data *bed;
1371 unsigned char st_other;
1374 section_name = symbol->section ? symbol->section->name : "(*none*)";
1376 bed = get_elf_backend_data (abfd);
1377 if (bed->elf_backend_print_symbol_all)
1378 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1382 name = symbol->name;
1383 bfd_print_symbol_vandf (abfd, file, symbol);
1386 fprintf (file, " %s\t", section_name);
1387 /* Print the "other" value for a symbol. For common symbols,
1388 we've already printed the size; now print the alignment.
1389 For other symbols, we have no specified alignment, and
1390 we've printed the address; now print the size. */
1391 if (symbol->section && bfd_is_com_section (symbol->section))
1392 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1394 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1395 bfd_fprintf_vma (abfd, file, val);
1397 /* If we have version information, print it. */
1398 if (elf_tdata (abfd)->dynversym_section != 0
1399 && (elf_tdata (abfd)->dynverdef_section != 0
1400 || elf_tdata (abfd)->dynverref_section != 0))
1402 unsigned int vernum;
1403 const char *version_string;
1405 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1408 version_string = "";
1409 else if (vernum == 1)
1410 version_string = "Base";
1411 else if (vernum <= elf_tdata (abfd)->cverdefs)
1413 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1416 Elf_Internal_Verneed *t;
1418 version_string = "";
1419 for (t = elf_tdata (abfd)->verref;
1423 Elf_Internal_Vernaux *a;
1425 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1427 if (a->vna_other == vernum)
1429 version_string = a->vna_nodename;
1436 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1437 fprintf (file, " %-11s", version_string);
1442 fprintf (file, " (%s)", version_string);
1443 for (i = 10 - strlen (version_string); i > 0; --i)
1448 /* If the st_other field is not zero, print it. */
1449 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1454 case STV_INTERNAL: fprintf (file, " .internal"); break;
1455 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1456 case STV_PROTECTED: fprintf (file, " .protected"); break;
1458 /* Some other non-defined flags are also present, so print
1460 fprintf (file, " 0x%02x", (unsigned int) st_other);
1463 fprintf (file, " %s", name);
1469 /* Allocate an ELF string table--force the first byte to be zero. */
1471 struct bfd_strtab_hash *
1472 _bfd_elf_stringtab_init (void)
1474 struct bfd_strtab_hash *ret;
1476 ret = _bfd_stringtab_init ();
1481 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1482 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1483 if (loc == (bfd_size_type) -1)
1485 _bfd_stringtab_free (ret);
1492 /* ELF .o/exec file reading */
1494 /* Create a new bfd section from an ELF section header. */
1497 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1499 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1500 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1501 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1504 name = bfd_elf_string_from_elf_section (abfd,
1505 elf_elfheader (abfd)->e_shstrndx,
1510 switch (hdr->sh_type)
1513 /* Inactive section. Throw it away. */
1516 case SHT_PROGBITS: /* Normal section with contents. */
1517 case SHT_NOBITS: /* .bss section. */
1518 case SHT_HASH: /* .hash section. */
1519 case SHT_NOTE: /* .note section. */
1520 case SHT_INIT_ARRAY: /* .init_array section. */
1521 case SHT_FINI_ARRAY: /* .fini_array section. */
1522 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1523 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1524 case SHT_GNU_HASH: /* .gnu.hash section. */
1525 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1527 case SHT_DYNAMIC: /* Dynamic linking information. */
1528 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1530 if (hdr->sh_link > elf_numsections (abfd)
1531 || elf_elfsections (abfd)[hdr->sh_link] == NULL)
1533 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1535 Elf_Internal_Shdr *dynsymhdr;
1537 /* The shared libraries distributed with hpux11 have a bogus
1538 sh_link field for the ".dynamic" section. Find the
1539 string table for the ".dynsym" section instead. */
1540 if (elf_dynsymtab (abfd) != 0)
1542 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1543 hdr->sh_link = dynsymhdr->sh_link;
1547 unsigned int i, num_sec;
1549 num_sec = elf_numsections (abfd);
1550 for (i = 1; i < num_sec; i++)
1552 dynsymhdr = elf_elfsections (abfd)[i];
1553 if (dynsymhdr->sh_type == SHT_DYNSYM)
1555 hdr->sh_link = dynsymhdr->sh_link;
1563 case SHT_SYMTAB: /* A symbol table */
1564 if (elf_onesymtab (abfd) == shindex)
1567 if (hdr->sh_entsize != bed->s->sizeof_sym)
1569 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1570 elf_onesymtab (abfd) = shindex;
1571 elf_tdata (abfd)->symtab_hdr = *hdr;
1572 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1573 abfd->flags |= HAS_SYMS;
1575 /* Sometimes a shared object will map in the symbol table. If
1576 SHF_ALLOC is set, and this is a shared object, then we also
1577 treat this section as a BFD section. We can not base the
1578 decision purely on SHF_ALLOC, because that flag is sometimes
1579 set in a relocatable object file, which would confuse the
1581 if ((hdr->sh_flags & SHF_ALLOC) != 0
1582 && (abfd->flags & DYNAMIC) != 0
1583 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1587 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1588 can't read symbols without that section loaded as well. It
1589 is most likely specified by the next section header. */
1590 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1592 unsigned int i, num_sec;
1594 num_sec = elf_numsections (abfd);
1595 for (i = shindex + 1; i < num_sec; i++)
1597 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1598 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1599 && hdr2->sh_link == shindex)
1603 for (i = 1; i < shindex; i++)
1605 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1606 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1607 && hdr2->sh_link == shindex)
1611 return bfd_section_from_shdr (abfd, i);
1615 case SHT_DYNSYM: /* A dynamic symbol table */
1616 if (elf_dynsymtab (abfd) == shindex)
1619 if (hdr->sh_entsize != bed->s->sizeof_sym)
1621 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1622 elf_dynsymtab (abfd) = shindex;
1623 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1624 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1625 abfd->flags |= HAS_SYMS;
1627 /* Besides being a symbol table, we also treat this as a regular
1628 section, so that objcopy can handle it. */
1629 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1631 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1632 if (elf_symtab_shndx (abfd) == shindex)
1635 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1636 elf_symtab_shndx (abfd) = shindex;
1637 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1638 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1641 case SHT_STRTAB: /* A string table */
1642 if (hdr->bfd_section != NULL)
1644 if (ehdr->e_shstrndx == shindex)
1646 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1647 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1650 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1653 elf_tdata (abfd)->strtab_hdr = *hdr;
1654 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1657 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1660 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1661 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1662 elf_elfsections (abfd)[shindex] = hdr;
1663 /* We also treat this as a regular section, so that objcopy
1665 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1669 /* If the string table isn't one of the above, then treat it as a
1670 regular section. We need to scan all the headers to be sure,
1671 just in case this strtab section appeared before the above. */
1672 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1674 unsigned int i, num_sec;
1676 num_sec = elf_numsections (abfd);
1677 for (i = 1; i < num_sec; i++)
1679 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1680 if (hdr2->sh_link == shindex)
1682 /* Prevent endless recursion on broken objects. */
1685 if (! bfd_section_from_shdr (abfd, i))
1687 if (elf_onesymtab (abfd) == i)
1689 if (elf_dynsymtab (abfd) == i)
1690 goto dynsymtab_strtab;
1694 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1698 /* *These* do a lot of work -- but build no sections! */
1700 asection *target_sect;
1701 Elf_Internal_Shdr *hdr2;
1702 unsigned int num_sec = elf_numsections (abfd);
1705 != (bfd_size_type) (hdr->sh_type == SHT_REL
1706 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
1709 /* Check for a bogus link to avoid crashing. */
1710 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1711 || hdr->sh_link >= num_sec)
1713 ((*_bfd_error_handler)
1714 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1715 abfd, hdr->sh_link, name, shindex));
1716 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1720 /* For some incomprehensible reason Oracle distributes
1721 libraries for Solaris in which some of the objects have
1722 bogus sh_link fields. It would be nice if we could just
1723 reject them, but, unfortunately, some people need to use
1724 them. We scan through the section headers; if we find only
1725 one suitable symbol table, we clobber the sh_link to point
1726 to it. I hope this doesn't break anything. */
1727 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1728 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1734 for (scan = 1; scan < num_sec; scan++)
1736 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1737 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1748 hdr->sh_link = found;
1751 /* Get the symbol table. */
1752 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1753 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
1754 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1757 /* If this reloc section does not use the main symbol table we
1758 don't treat it as a reloc section. BFD can't adequately
1759 represent such a section, so at least for now, we don't
1760 try. We just present it as a normal section. We also
1761 can't use it as a reloc section if it points to the null
1762 section, an invalid section, or another reloc section. */
1763 if (hdr->sh_link != elf_onesymtab (abfd)
1764 || hdr->sh_info == SHN_UNDEF
1765 || (hdr->sh_info >= SHN_LORESERVE && hdr->sh_info <= SHN_HIRESERVE)
1766 || hdr->sh_info >= num_sec
1767 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
1768 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
1769 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1772 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1774 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1775 if (target_sect == NULL)
1778 if ((target_sect->flags & SEC_RELOC) == 0
1779 || target_sect->reloc_count == 0)
1780 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1784 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1785 amt = sizeof (*hdr2);
1786 hdr2 = bfd_alloc (abfd, amt);
1787 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1790 elf_elfsections (abfd)[shindex] = hdr2;
1791 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1792 target_sect->flags |= SEC_RELOC;
1793 target_sect->relocation = NULL;
1794 target_sect->rel_filepos = hdr->sh_offset;
1795 /* In the section to which the relocations apply, mark whether
1796 its relocations are of the REL or RELA variety. */
1797 if (hdr->sh_size != 0)
1798 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
1799 abfd->flags |= HAS_RELOC;
1803 case SHT_GNU_verdef:
1804 elf_dynverdef (abfd) = shindex;
1805 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1806 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1808 case SHT_GNU_versym:
1809 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
1811 elf_dynversym (abfd) = shindex;
1812 elf_tdata (abfd)->dynversym_hdr = *hdr;
1813 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1815 case SHT_GNU_verneed:
1816 elf_dynverref (abfd) = shindex;
1817 elf_tdata (abfd)->dynverref_hdr = *hdr;
1818 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1824 /* We need a BFD section for objcopy and relocatable linking,
1825 and it's handy to have the signature available as the section
1827 if (! IS_VALID_GROUP_SECTION_HEADER (hdr))
1829 name = group_signature (abfd, hdr);
1832 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1834 if (hdr->contents != NULL)
1836 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1837 unsigned int n_elt = hdr->sh_size / GRP_ENTRY_SIZE;
1840 if (idx->flags & GRP_COMDAT)
1841 hdr->bfd_section->flags
1842 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1844 /* We try to keep the same section order as it comes in. */
1846 while (--n_elt != 0)
1850 if (idx->shdr != NULL
1851 && (s = idx->shdr->bfd_section) != NULL
1852 && elf_next_in_group (s) != NULL)
1854 elf_next_in_group (hdr->bfd_section) = s;
1862 /* Possibly an attributes section. */
1863 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
1864 || hdr->sh_type == bed->obj_attrs_section_type)
1866 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1868 _bfd_elf_parse_attributes (abfd, hdr);
1872 /* Check for any processor-specific section types. */
1873 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
1876 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
1878 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1879 /* FIXME: How to properly handle allocated section reserved
1880 for applications? */
1881 (*_bfd_error_handler)
1882 (_("%B: don't know how to handle allocated, application "
1883 "specific section `%s' [0x%8x]"),
1884 abfd, name, hdr->sh_type);
1886 /* Allow sections reserved for applications. */
1887 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1890 else if (hdr->sh_type >= SHT_LOPROC
1891 && hdr->sh_type <= SHT_HIPROC)
1892 /* FIXME: We should handle this section. */
1893 (*_bfd_error_handler)
1894 (_("%B: don't know how to handle processor specific section "
1896 abfd, name, hdr->sh_type);
1897 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
1899 /* Unrecognised OS-specific sections. */
1900 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
1901 /* SHF_OS_NONCONFORMING indicates that special knowledge is
1902 required to correctly process the section and the file should
1903 be rejected with an error message. */
1904 (*_bfd_error_handler)
1905 (_("%B: don't know how to handle OS specific section "
1907 abfd, name, hdr->sh_type);
1909 /* Otherwise it should be processed. */
1910 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1913 /* FIXME: We should handle this section. */
1914 (*_bfd_error_handler)
1915 (_("%B: don't know how to handle section `%s' [0x%8x]"),
1916 abfd, name, hdr->sh_type);
1924 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
1925 Return SEC for sections that have no elf section, and NULL on error. */
1928 bfd_section_from_r_symndx (bfd *abfd,
1929 struct sym_sec_cache *cache,
1931 unsigned long r_symndx)
1933 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
1936 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
1938 Elf_Internal_Shdr *symtab_hdr;
1939 unsigned char esym[sizeof (Elf64_External_Sym)];
1940 Elf_External_Sym_Shndx eshndx;
1941 Elf_Internal_Sym isym;
1943 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1944 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
1945 &isym, esym, &eshndx) == NULL)
1948 if (cache->abfd != abfd)
1950 memset (cache->indx, -1, sizeof (cache->indx));
1953 cache->indx[ent] = r_symndx;
1954 cache->shndx[ent] = isym.st_shndx;
1957 s = bfd_section_from_elf_index (abfd, cache->shndx[ent]);
1964 /* Given an ELF section number, retrieve the corresponding BFD
1968 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
1970 if (index >= elf_numsections (abfd))
1972 return elf_elfsections (abfd)[index]->bfd_section;
1975 static const struct bfd_elf_special_section special_sections_b[] =
1977 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1978 { NULL, 0, 0, 0, 0 }
1981 static const struct bfd_elf_special_section special_sections_c[] =
1983 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
1984 { NULL, 0, 0, 0, 0 }
1987 static const struct bfd_elf_special_section special_sections_d[] =
1989 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1990 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1991 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
1992 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
1993 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
1994 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
1995 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
1996 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
1997 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
1998 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
1999 { NULL, 0, 0, 0, 0 }
2002 static const struct bfd_elf_special_section special_sections_f[] =
2004 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2005 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2006 { NULL, 0, 0, 0, 0 }
2009 static const struct bfd_elf_special_section special_sections_g[] =
2011 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2012 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2013 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2014 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2015 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2016 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2017 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2018 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2019 { NULL, 0, 0, 0, 0 }
2022 static const struct bfd_elf_special_section special_sections_h[] =
2024 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2025 { NULL, 0, 0, 0, 0 }
2028 static const struct bfd_elf_special_section special_sections_i[] =
2030 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2031 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2032 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2033 { NULL, 0, 0, 0, 0 }
2036 static const struct bfd_elf_special_section special_sections_l[] =
2038 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2039 { NULL, 0, 0, 0, 0 }
2042 static const struct bfd_elf_special_section special_sections_n[] =
2044 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2045 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2046 { NULL, 0, 0, 0, 0 }
2049 static const struct bfd_elf_special_section special_sections_p[] =
2051 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2052 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2053 { NULL, 0, 0, 0, 0 }
2056 static const struct bfd_elf_special_section special_sections_r[] =
2058 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2059 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2060 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2061 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2062 { NULL, 0, 0, 0, 0 }
2065 static const struct bfd_elf_special_section special_sections_s[] =
2067 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2068 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2069 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2070 /* See struct bfd_elf_special_section declaration for the semantics of
2071 this special case where .prefix_length != strlen (.prefix). */
2072 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2073 { NULL, 0, 0, 0, 0 }
2076 static const struct bfd_elf_special_section special_sections_t[] =
2078 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2079 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2080 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2081 { NULL, 0, 0, 0, 0 }
2084 static const struct bfd_elf_special_section *special_sections[] =
2086 special_sections_b, /* 'b' */
2087 special_sections_c, /* 'c' */
2088 special_sections_d, /* 'd' */
2090 special_sections_f, /* 'f' */
2091 special_sections_g, /* 'g' */
2092 special_sections_h, /* 'h' */
2093 special_sections_i, /* 'i' */
2096 special_sections_l, /* 'l' */
2098 special_sections_n, /* 'n' */
2100 special_sections_p, /* 'p' */
2102 special_sections_r, /* 'r' */
2103 special_sections_s, /* 's' */
2104 special_sections_t, /* 't' */
2107 const struct bfd_elf_special_section *
2108 _bfd_elf_get_special_section (const char *name,
2109 const struct bfd_elf_special_section *spec,
2115 len = strlen (name);
2117 for (i = 0; spec[i].prefix != NULL; i++)
2120 int prefix_len = spec[i].prefix_length;
2122 if (len < prefix_len)
2124 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2127 suffix_len = spec[i].suffix_length;
2128 if (suffix_len <= 0)
2130 if (name[prefix_len] != 0)
2132 if (suffix_len == 0)
2134 if (name[prefix_len] != '.'
2135 && (suffix_len == -2
2136 || (rela && spec[i].type == SHT_REL)))
2142 if (len < prefix_len + suffix_len)
2144 if (memcmp (name + len - suffix_len,
2145 spec[i].prefix + prefix_len,
2155 const struct bfd_elf_special_section *
2156 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2159 const struct bfd_elf_special_section *spec;
2160 const struct elf_backend_data *bed;
2162 /* See if this is one of the special sections. */
2163 if (sec->name == NULL)
2166 bed = get_elf_backend_data (abfd);
2167 spec = bed->special_sections;
2170 spec = _bfd_elf_get_special_section (sec->name,
2171 bed->special_sections,
2177 if (sec->name[0] != '.')
2180 i = sec->name[1] - 'b';
2181 if (i < 0 || i > 't' - 'b')
2184 spec = special_sections[i];
2189 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2193 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2195 struct bfd_elf_section_data *sdata;
2196 const struct elf_backend_data *bed;
2197 const struct bfd_elf_special_section *ssect;
2199 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2202 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2205 sec->used_by_bfd = sdata;
2208 /* Indicate whether or not this section should use RELA relocations. */
2209 bed = get_elf_backend_data (abfd);
2210 sec->use_rela_p = bed->default_use_rela_p;
2212 /* When we read a file, we don't need to set ELF section type and
2213 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2214 anyway. We will set ELF section type and flags for all linker
2215 created sections. If user specifies BFD section flags, we will
2216 set ELF section type and flags based on BFD section flags in
2217 elf_fake_sections. */
2218 if ((!sec->flags && abfd->direction != read_direction)
2219 || (sec->flags & SEC_LINKER_CREATED) != 0)
2221 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2224 elf_section_type (sec) = ssect->type;
2225 elf_section_flags (sec) = ssect->attr;
2229 return _bfd_generic_new_section_hook (abfd, sec);
2232 /* Create a new bfd section from an ELF program header.
2234 Since program segments have no names, we generate a synthetic name
2235 of the form segment<NUM>, where NUM is generally the index in the
2236 program header table. For segments that are split (see below) we
2237 generate the names segment<NUM>a and segment<NUM>b.
2239 Note that some program segments may have a file size that is different than
2240 (less than) the memory size. All this means is that at execution the
2241 system must allocate the amount of memory specified by the memory size,
2242 but only initialize it with the first "file size" bytes read from the
2243 file. This would occur for example, with program segments consisting
2244 of combined data+bss.
2246 To handle the above situation, this routine generates TWO bfd sections
2247 for the single program segment. The first has the length specified by
2248 the file size of the segment, and the second has the length specified
2249 by the difference between the two sizes. In effect, the segment is split
2250 into its initialized and uninitialized parts.
2255 _bfd_elf_make_section_from_phdr (bfd *abfd,
2256 Elf_Internal_Phdr *hdr,
2258 const char *typename)
2266 split = ((hdr->p_memsz > 0)
2267 && (hdr->p_filesz > 0)
2268 && (hdr->p_memsz > hdr->p_filesz));
2270 if (hdr->p_filesz > 0)
2272 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2273 len = strlen (namebuf) + 1;
2274 name = bfd_alloc (abfd, len);
2277 memcpy (name, namebuf, len);
2278 newsect = bfd_make_section (abfd, name);
2279 if (newsect == NULL)
2281 newsect->vma = hdr->p_vaddr;
2282 newsect->lma = hdr->p_paddr;
2283 newsect->size = hdr->p_filesz;
2284 newsect->filepos = hdr->p_offset;
2285 newsect->flags |= SEC_HAS_CONTENTS;
2286 newsect->alignment_power = bfd_log2 (hdr->p_align);
2287 if (hdr->p_type == PT_LOAD)
2289 newsect->flags |= SEC_ALLOC;
2290 newsect->flags |= SEC_LOAD;
2291 if (hdr->p_flags & PF_X)
2293 /* FIXME: all we known is that it has execute PERMISSION,
2295 newsect->flags |= SEC_CODE;
2298 if (!(hdr->p_flags & PF_W))
2300 newsect->flags |= SEC_READONLY;
2304 if (hdr->p_memsz > hdr->p_filesz)
2308 sprintf (namebuf, "%s%d%s", typename, index, split ? "b" : "");
2309 len = strlen (namebuf) + 1;
2310 name = bfd_alloc (abfd, len);
2313 memcpy (name, namebuf, len);
2314 newsect = bfd_make_section (abfd, name);
2315 if (newsect == NULL)
2317 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2318 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2319 newsect->size = hdr->p_memsz - hdr->p_filesz;
2320 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2321 align = newsect->vma & -newsect->vma;
2322 if (align == 0 || align > hdr->p_align)
2323 align = hdr->p_align;
2324 newsect->alignment_power = bfd_log2 (align);
2325 if (hdr->p_type == PT_LOAD)
2327 /* Hack for gdb. Segments that have not been modified do
2328 not have their contents written to a core file, on the
2329 assumption that a debugger can find the contents in the
2330 executable. We flag this case by setting the fake
2331 section size to zero. Note that "real" bss sections will
2332 always have their contents dumped to the core file. */
2333 if (bfd_get_format (abfd) == bfd_core)
2335 newsect->flags |= SEC_ALLOC;
2336 if (hdr->p_flags & PF_X)
2337 newsect->flags |= SEC_CODE;
2339 if (!(hdr->p_flags & PF_W))
2340 newsect->flags |= SEC_READONLY;
2347 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2349 const struct elf_backend_data *bed;
2351 switch (hdr->p_type)
2354 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2357 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2360 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2363 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2366 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2368 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2373 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2376 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2378 case PT_GNU_EH_FRAME:
2379 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2383 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2386 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
2389 /* Check for any processor-specific program segment types. */
2390 bed = get_elf_backend_data (abfd);
2391 return bed->elf_backend_section_from_phdr (abfd, hdr, index, "proc");
2395 /* Initialize REL_HDR, the section-header for new section, containing
2396 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2397 relocations; otherwise, we use REL relocations. */
2400 _bfd_elf_init_reloc_shdr (bfd *abfd,
2401 Elf_Internal_Shdr *rel_hdr,
2403 bfd_boolean use_rela_p)
2406 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2407 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2409 name = bfd_alloc (abfd, amt);
2412 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2414 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2416 if (rel_hdr->sh_name == (unsigned int) -1)
2418 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2419 rel_hdr->sh_entsize = (use_rela_p
2420 ? bed->s->sizeof_rela
2421 : bed->s->sizeof_rel);
2422 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2423 rel_hdr->sh_flags = 0;
2424 rel_hdr->sh_addr = 0;
2425 rel_hdr->sh_size = 0;
2426 rel_hdr->sh_offset = 0;
2431 /* Set up an ELF internal section header for a section. */
2434 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2436 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2437 bfd_boolean *failedptr = failedptrarg;
2438 Elf_Internal_Shdr *this_hdr;
2439 unsigned int sh_type;
2443 /* We already failed; just get out of the bfd_map_over_sections
2448 this_hdr = &elf_section_data (asect)->this_hdr;
2450 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2451 asect->name, FALSE);
2452 if (this_hdr->sh_name == (unsigned int) -1)
2458 /* Don't clear sh_flags. Assembler may set additional bits. */
2460 if ((asect->flags & SEC_ALLOC) != 0
2461 || asect->user_set_vma)
2462 this_hdr->sh_addr = asect->vma;
2464 this_hdr->sh_addr = 0;
2466 this_hdr->sh_offset = 0;
2467 this_hdr->sh_size = asect->size;
2468 this_hdr->sh_link = 0;
2469 this_hdr->sh_addralign = 1 << asect->alignment_power;
2470 /* The sh_entsize and sh_info fields may have been set already by
2471 copy_private_section_data. */
2473 this_hdr->bfd_section = asect;
2474 this_hdr->contents = NULL;
2476 /* If the section type is unspecified, we set it based on
2478 if ((asect->flags & SEC_GROUP) != 0)
2479 sh_type = SHT_GROUP;
2480 else if ((asect->flags & SEC_ALLOC) != 0
2481 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2482 || (asect->flags & SEC_NEVER_LOAD) != 0))
2483 sh_type = SHT_NOBITS;
2485 sh_type = SHT_PROGBITS;
2487 if (this_hdr->sh_type == SHT_NULL)
2488 this_hdr->sh_type = sh_type;
2489 else if (this_hdr->sh_type == SHT_NOBITS
2490 && sh_type == SHT_PROGBITS
2491 && (asect->flags & SEC_ALLOC) != 0)
2493 /* Warn if we are changing a NOBITS section to PROGBITS, but
2494 allow the link to proceed. This can happen when users link
2495 non-bss input sections to bss output sections, or emit data
2496 to a bss output section via a linker script. */
2497 (*_bfd_error_handler)
2498 (_("section `%A' type changed to PROGBITS"), asect);
2499 this_hdr->sh_type = sh_type;
2502 switch (this_hdr->sh_type)
2508 case SHT_INIT_ARRAY:
2509 case SHT_FINI_ARRAY:
2510 case SHT_PREINIT_ARRAY:
2517 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2521 this_hdr->sh_entsize = bed->s->sizeof_sym;
2525 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2529 if (get_elf_backend_data (abfd)->may_use_rela_p)
2530 this_hdr->sh_entsize = bed->s->sizeof_rela;
2534 if (get_elf_backend_data (abfd)->may_use_rel_p)
2535 this_hdr->sh_entsize = bed->s->sizeof_rel;
2538 case SHT_GNU_versym:
2539 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2542 case SHT_GNU_verdef:
2543 this_hdr->sh_entsize = 0;
2544 /* objcopy or strip will copy over sh_info, but may not set
2545 cverdefs. The linker will set cverdefs, but sh_info will be
2547 if (this_hdr->sh_info == 0)
2548 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2550 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2551 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2554 case SHT_GNU_verneed:
2555 this_hdr->sh_entsize = 0;
2556 /* objcopy or strip will copy over sh_info, but may not set
2557 cverrefs. The linker will set cverrefs, but sh_info will be
2559 if (this_hdr->sh_info == 0)
2560 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2562 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2563 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2567 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
2571 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
2575 if ((asect->flags & SEC_ALLOC) != 0)
2576 this_hdr->sh_flags |= SHF_ALLOC;
2577 if ((asect->flags & SEC_READONLY) == 0)
2578 this_hdr->sh_flags |= SHF_WRITE;
2579 if ((asect->flags & SEC_CODE) != 0)
2580 this_hdr->sh_flags |= SHF_EXECINSTR;
2581 if ((asect->flags & SEC_MERGE) != 0)
2583 this_hdr->sh_flags |= SHF_MERGE;
2584 this_hdr->sh_entsize = asect->entsize;
2585 if ((asect->flags & SEC_STRINGS) != 0)
2586 this_hdr->sh_flags |= SHF_STRINGS;
2588 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2589 this_hdr->sh_flags |= SHF_GROUP;
2590 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2592 this_hdr->sh_flags |= SHF_TLS;
2593 if (asect->size == 0
2594 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2596 struct bfd_link_order *o = asect->map_tail.link_order;
2598 this_hdr->sh_size = 0;
2601 this_hdr->sh_size = o->offset + o->size;
2602 if (this_hdr->sh_size != 0)
2603 this_hdr->sh_type = SHT_NOBITS;
2608 /* Check for processor-specific section types. */
2609 sh_type = this_hdr->sh_type;
2610 if (bed->elf_backend_fake_sections
2611 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2614 if (sh_type == SHT_NOBITS && asect->size != 0)
2616 /* Don't change the header type from NOBITS if we are being
2617 called for objcopy --only-keep-debug. */
2618 this_hdr->sh_type = sh_type;
2621 /* If the section has relocs, set up a section header for the
2622 SHT_REL[A] section. If two relocation sections are required for
2623 this section, it is up to the processor-specific back-end to
2624 create the other. */
2625 if ((asect->flags & SEC_RELOC) != 0
2626 && !_bfd_elf_init_reloc_shdr (abfd,
2627 &elf_section_data (asect)->rel_hdr,
2633 /* Fill in the contents of a SHT_GROUP section. */
2636 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2638 bfd_boolean *failedptr = failedptrarg;
2639 unsigned long symindx;
2640 asection *elt, *first;
2644 /* Ignore linker created group section. See elfNN_ia64_object_p in
2646 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2651 if (elf_group_id (sec) != NULL)
2652 symindx = elf_group_id (sec)->udata.i;
2656 /* If called from the assembler, swap_out_syms will have set up
2657 elf_section_syms; If called for "ld -r", use target_index. */
2658 if (elf_section_syms (abfd) != NULL)
2659 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2661 symindx = sec->target_index;
2663 elf_section_data (sec)->this_hdr.sh_info = symindx;
2665 /* The contents won't be allocated for "ld -r" or objcopy. */
2667 if (sec->contents == NULL)
2670 sec->contents = bfd_alloc (abfd, sec->size);
2672 /* Arrange for the section to be written out. */
2673 elf_section_data (sec)->this_hdr.contents = sec->contents;
2674 if (sec->contents == NULL)
2681 loc = sec->contents + sec->size;
2683 /* Get the pointer to the first section in the group that gas
2684 squirreled away here. objcopy arranges for this to be set to the
2685 start of the input section group. */
2686 first = elt = elf_next_in_group (sec);
2688 /* First element is a flag word. Rest of section is elf section
2689 indices for all the sections of the group. Write them backwards
2690 just to keep the group in the same order as given in .section
2691 directives, not that it matters. */
2700 s = s->output_section;
2703 idx = elf_section_data (s)->this_idx;
2704 H_PUT_32 (abfd, idx, loc);
2705 elt = elf_next_in_group (elt);
2710 if ((loc -= 4) != sec->contents)
2713 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2716 /* Assign all ELF section numbers. The dummy first section is handled here
2717 too. The link/info pointers for the standard section types are filled
2718 in here too, while we're at it. */
2721 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2723 struct elf_obj_tdata *t = elf_tdata (abfd);
2725 unsigned int section_number, secn;
2726 Elf_Internal_Shdr **i_shdrp;
2727 struct bfd_elf_section_data *d;
2731 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2733 /* SHT_GROUP sections are in relocatable files only. */
2734 if (link_info == NULL || link_info->relocatable)
2736 /* Put SHT_GROUP sections first. */
2737 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2739 d = elf_section_data (sec);
2741 if (d->this_hdr.sh_type == SHT_GROUP)
2743 if (sec->flags & SEC_LINKER_CREATED)
2745 /* Remove the linker created SHT_GROUP sections. */
2746 bfd_section_list_remove (abfd, sec);
2747 abfd->section_count--;
2751 if (section_number == SHN_LORESERVE)
2752 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2753 d->this_idx = section_number++;
2759 for (sec = abfd->sections; sec; sec = sec->next)
2761 d = elf_section_data (sec);
2763 if (d->this_hdr.sh_type != SHT_GROUP)
2765 if (section_number == SHN_LORESERVE)
2766 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2767 d->this_idx = section_number++;
2769 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2770 if ((sec->flags & SEC_RELOC) == 0)
2774 if (section_number == SHN_LORESERVE)
2775 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2776 d->rel_idx = section_number++;
2777 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2782 if (section_number == SHN_LORESERVE)
2783 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2784 d->rel_idx2 = section_number++;
2785 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2791 if (section_number == SHN_LORESERVE)
2792 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2793 t->shstrtab_section = section_number++;
2794 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2795 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2797 if (bfd_get_symcount (abfd) > 0)
2799 if (section_number == SHN_LORESERVE)
2800 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2801 t->symtab_section = section_number++;
2802 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2803 if (section_number > SHN_LORESERVE - 2)
2805 if (section_number == SHN_LORESERVE)
2806 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2807 t->symtab_shndx_section = section_number++;
2808 t->symtab_shndx_hdr.sh_name
2809 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2810 ".symtab_shndx", FALSE);
2811 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2814 if (section_number == SHN_LORESERVE)
2815 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2816 t->strtab_section = section_number++;
2817 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2820 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2821 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2823 elf_numsections (abfd) = section_number;
2824 elf_elfheader (abfd)->e_shnum = section_number;
2825 if (section_number > SHN_LORESERVE)
2826 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2828 /* Set up the list of section header pointers, in agreement with the
2830 i_shdrp = bfd_zalloc2 (abfd, section_number, sizeof (Elf_Internal_Shdr *));
2831 if (i_shdrp == NULL)
2834 i_shdrp[0] = bfd_zalloc (abfd, sizeof (Elf_Internal_Shdr));
2835 if (i_shdrp[0] == NULL)
2837 bfd_release (abfd, i_shdrp);
2841 elf_elfsections (abfd) = i_shdrp;
2843 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2844 if (bfd_get_symcount (abfd) > 0)
2846 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2847 if (elf_numsections (abfd) > SHN_LORESERVE)
2849 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2850 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2852 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2853 t->symtab_hdr.sh_link = t->strtab_section;
2856 for (sec = abfd->sections; sec; sec = sec->next)
2858 struct bfd_elf_section_data *d = elf_section_data (sec);
2862 i_shdrp[d->this_idx] = &d->this_hdr;
2863 if (d->rel_idx != 0)
2864 i_shdrp[d->rel_idx] = &d->rel_hdr;
2865 if (d->rel_idx2 != 0)
2866 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2868 /* Fill in the sh_link and sh_info fields while we're at it. */
2870 /* sh_link of a reloc section is the section index of the symbol
2871 table. sh_info is the section index of the section to which
2872 the relocation entries apply. */
2873 if (d->rel_idx != 0)
2875 d->rel_hdr.sh_link = t->symtab_section;
2876 d->rel_hdr.sh_info = d->this_idx;
2878 if (d->rel_idx2 != 0)
2880 d->rel_hdr2->sh_link = t->symtab_section;
2881 d->rel_hdr2->sh_info = d->this_idx;
2884 /* We need to set up sh_link for SHF_LINK_ORDER. */
2885 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
2887 s = elf_linked_to_section (sec);
2890 /* elf_linked_to_section points to the input section. */
2891 if (link_info != NULL)
2893 /* Check discarded linkonce section. */
2894 if (elf_discarded_section (s))
2897 (*_bfd_error_handler)
2898 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
2899 abfd, d->this_hdr.bfd_section,
2901 /* Point to the kept section if it has the same
2902 size as the discarded one. */
2903 kept = _bfd_elf_check_kept_section (s, link_info);
2906 bfd_set_error (bfd_error_bad_value);
2912 s = s->output_section;
2913 BFD_ASSERT (s != NULL);
2917 /* Handle objcopy. */
2918 if (s->output_section == NULL)
2920 (*_bfd_error_handler)
2921 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
2922 abfd, d->this_hdr.bfd_section, s, s->owner);
2923 bfd_set_error (bfd_error_bad_value);
2926 s = s->output_section;
2928 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2933 The Intel C compiler generates SHT_IA_64_UNWIND with
2934 SHF_LINK_ORDER. But it doesn't set the sh_link or
2935 sh_info fields. Hence we could get the situation
2937 const struct elf_backend_data *bed
2938 = get_elf_backend_data (abfd);
2939 if (bed->link_order_error_handler)
2940 bed->link_order_error_handler
2941 (_("%B: warning: sh_link not set for section `%A'"),
2946 switch (d->this_hdr.sh_type)
2950 /* A reloc section which we are treating as a normal BFD
2951 section. sh_link is the section index of the symbol
2952 table. sh_info is the section index of the section to
2953 which the relocation entries apply. We assume that an
2954 allocated reloc section uses the dynamic symbol table.
2955 FIXME: How can we be sure? */
2956 s = bfd_get_section_by_name (abfd, ".dynsym");
2958 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2960 /* We look up the section the relocs apply to by name. */
2962 if (d->this_hdr.sh_type == SHT_REL)
2966 s = bfd_get_section_by_name (abfd, name);
2968 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2972 /* We assume that a section named .stab*str is a stabs
2973 string section. We look for a section with the same name
2974 but without the trailing ``str'', and set its sh_link
2975 field to point to this section. */
2976 if (CONST_STRNEQ (sec->name, ".stab")
2977 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2982 len = strlen (sec->name);
2983 alc = bfd_malloc (len - 2);
2986 memcpy (alc, sec->name, len - 3);
2987 alc[len - 3] = '\0';
2988 s = bfd_get_section_by_name (abfd, alc);
2992 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
2994 /* This is a .stab section. */
2995 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
2996 elf_section_data (s)->this_hdr.sh_entsize
2997 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3004 case SHT_GNU_verneed:
3005 case SHT_GNU_verdef:
3006 /* sh_link is the section header index of the string table
3007 used for the dynamic entries, or the symbol table, or the
3009 s = bfd_get_section_by_name (abfd, ".dynstr");
3011 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3014 case SHT_GNU_LIBLIST:
3015 /* sh_link is the section header index of the prelink library
3016 list used for the dynamic entries, or the symbol table, or
3017 the version strings. */
3018 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3019 ? ".dynstr" : ".gnu.libstr");
3021 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3026 case SHT_GNU_versym:
3027 /* sh_link is the section header index of the symbol table
3028 this hash table or version table is for. */
3029 s = bfd_get_section_by_name (abfd, ".dynsym");
3031 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3035 d->this_hdr.sh_link = t->symtab_section;
3039 for (secn = 1; secn < section_number; ++secn)
3040 if (i_shdrp[secn] == NULL)
3041 i_shdrp[secn] = i_shdrp[0];
3043 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3044 i_shdrp[secn]->sh_name);
3048 /* Map symbol from it's internal number to the external number, moving
3049 all local symbols to be at the head of the list. */
3052 sym_is_global (bfd *abfd, asymbol *sym)
3054 /* If the backend has a special mapping, use it. */
3055 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3056 if (bed->elf_backend_sym_is_global)
3057 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3059 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3060 || bfd_is_und_section (bfd_get_section (sym))
3061 || bfd_is_com_section (bfd_get_section (sym)));
3064 /* Don't output section symbols for sections that are not going to be
3065 output. Also, don't output section symbols for reloc and other
3066 special sections. */
3069 ignore_section_sym (bfd *abfd, asymbol *sym)
3071 return ((sym->flags & BSF_SECTION_SYM) != 0
3073 || (sym->section->owner != abfd
3074 && (sym->section->output_section->owner != abfd
3075 || sym->section->output_offset != 0))));
3079 elf_map_symbols (bfd *abfd)
3081 unsigned int symcount = bfd_get_symcount (abfd);
3082 asymbol **syms = bfd_get_outsymbols (abfd);
3083 asymbol **sect_syms;
3084 unsigned int num_locals = 0;
3085 unsigned int num_globals = 0;
3086 unsigned int num_locals2 = 0;
3087 unsigned int num_globals2 = 0;
3094 fprintf (stderr, "elf_map_symbols\n");
3098 for (asect = abfd->sections; asect; asect = asect->next)
3100 if (max_index < asect->index)
3101 max_index = asect->index;
3105 sect_syms = bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3106 if (sect_syms == NULL)
3108 elf_section_syms (abfd) = sect_syms;
3109 elf_num_section_syms (abfd) = max_index;
3111 /* Init sect_syms entries for any section symbols we have already
3112 decided to output. */
3113 for (idx = 0; idx < symcount; idx++)
3115 asymbol *sym = syms[idx];
3117 if ((sym->flags & BSF_SECTION_SYM) != 0
3118 && !ignore_section_sym (abfd, sym))
3120 asection *sec = sym->section;
3122 if (sec->owner != abfd)
3123 sec = sec->output_section;
3125 sect_syms[sec->index] = syms[idx];
3129 /* Classify all of the symbols. */
3130 for (idx = 0; idx < symcount; idx++)
3132 if (ignore_section_sym (abfd, syms[idx]))
3134 if (!sym_is_global (abfd, syms[idx]))
3140 /* We will be adding a section symbol for each normal BFD section. Most
3141 sections will already have a section symbol in outsymbols, but
3142 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3143 at least in that case. */
3144 for (asect = abfd->sections; asect; asect = asect->next)
3146 if (sect_syms[asect->index] == NULL)
3148 if (!sym_is_global (abfd, asect->symbol))
3155 /* Now sort the symbols so the local symbols are first. */
3156 new_syms = bfd_alloc2 (abfd, num_locals + num_globals, sizeof (asymbol *));
3158 if (new_syms == NULL)
3161 for (idx = 0; idx < symcount; idx++)
3163 asymbol *sym = syms[idx];
3166 if (ignore_section_sym (abfd, sym))
3168 if (!sym_is_global (abfd, sym))
3171 i = num_locals + num_globals2++;
3173 sym->udata.i = i + 1;
3175 for (asect = abfd->sections; asect; asect = asect->next)
3177 if (sect_syms[asect->index] == NULL)
3179 asymbol *sym = asect->symbol;
3182 sect_syms[asect->index] = sym;
3183 if (!sym_is_global (abfd, sym))
3186 i = num_locals + num_globals2++;
3188 sym->udata.i = i + 1;
3192 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3194 elf_num_locals (abfd) = num_locals;
3195 elf_num_globals (abfd) = num_globals;
3199 /* Align to the maximum file alignment that could be required for any
3200 ELF data structure. */
3202 static inline file_ptr
3203 align_file_position (file_ptr off, int align)
3205 return (off + align - 1) & ~(align - 1);
3208 /* Assign a file position to a section, optionally aligning to the
3209 required section alignment. */
3212 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3220 al = i_shdrp->sh_addralign;
3222 offset = BFD_ALIGN (offset, al);
3224 i_shdrp->sh_offset = offset;
3225 if (i_shdrp->bfd_section != NULL)
3226 i_shdrp->bfd_section->filepos = offset;
3227 if (i_shdrp->sh_type != SHT_NOBITS)
3228 offset += i_shdrp->sh_size;
3232 /* Compute the file positions we are going to put the sections at, and
3233 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3234 is not NULL, this is being called by the ELF backend linker. */
3237 _bfd_elf_compute_section_file_positions (bfd *abfd,
3238 struct bfd_link_info *link_info)
3240 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3242 struct bfd_strtab_hash *strtab = NULL;
3243 Elf_Internal_Shdr *shstrtab_hdr;
3245 if (abfd->output_has_begun)
3248 /* Do any elf backend specific processing first. */
3249 if (bed->elf_backend_begin_write_processing)
3250 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3252 if (! prep_headers (abfd))
3255 /* Post process the headers if necessary. */
3256 if (bed->elf_backend_post_process_headers)
3257 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3260 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3264 if (!assign_section_numbers (abfd, link_info))
3267 /* The backend linker builds symbol table information itself. */
3268 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3270 /* Non-zero if doing a relocatable link. */
3271 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3273 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3277 if (link_info == NULL)
3279 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3284 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3285 /* sh_name was set in prep_headers. */
3286 shstrtab_hdr->sh_type = SHT_STRTAB;
3287 shstrtab_hdr->sh_flags = 0;
3288 shstrtab_hdr->sh_addr = 0;
3289 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3290 shstrtab_hdr->sh_entsize = 0;
3291 shstrtab_hdr->sh_link = 0;
3292 shstrtab_hdr->sh_info = 0;
3293 /* sh_offset is set in assign_file_positions_except_relocs. */
3294 shstrtab_hdr->sh_addralign = 1;
3296 if (!assign_file_positions_except_relocs (abfd, link_info))
3299 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3302 Elf_Internal_Shdr *hdr;
3304 off = elf_tdata (abfd)->next_file_pos;
3306 hdr = &elf_tdata (abfd)->symtab_hdr;
3307 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3309 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3310 if (hdr->sh_size != 0)
3311 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3313 hdr = &elf_tdata (abfd)->strtab_hdr;
3314 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3316 elf_tdata (abfd)->next_file_pos = off;
3318 /* Now that we know where the .strtab section goes, write it
3320 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3321 || ! _bfd_stringtab_emit (abfd, strtab))
3323 _bfd_stringtab_free (strtab);
3326 abfd->output_has_begun = TRUE;
3331 /* Make an initial estimate of the size of the program header. If we
3332 get the number wrong here, we'll redo section placement. */
3334 static bfd_size_type
3335 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3339 const struct elf_backend_data *bed;
3341 /* Assume we will need exactly two PT_LOAD segments: one for text
3342 and one for data. */
3345 s = bfd_get_section_by_name (abfd, ".interp");
3346 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3348 /* If we have a loadable interpreter section, we need a
3349 PT_INTERP segment. In this case, assume we also need a
3350 PT_PHDR segment, although that may not be true for all
3355 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3357 /* We need a PT_DYNAMIC segment. */
3362 /* We need a PT_GNU_RELRO segment only when there is a
3363 PT_DYNAMIC segment. */
3368 if (elf_tdata (abfd)->eh_frame_hdr)
3370 /* We need a PT_GNU_EH_FRAME segment. */
3374 if (elf_tdata (abfd)->stack_flags)
3376 /* We need a PT_GNU_STACK segment. */
3380 for (s = abfd->sections; s != NULL; s = s->next)
3382 if ((s->flags & SEC_LOAD) != 0
3383 && CONST_STRNEQ (s->name, ".note"))
3385 /* We need a PT_NOTE segment. */
3387 /* Try to create just one PT_NOTE segment
3388 for all adjacent loadable .note* sections.
3389 gABI requires that within a PT_NOTE segment
3390 (and also inside of each SHT_NOTE section)
3391 each note is padded to a multiple of 4 size,
3392 so we check whether the sections are correctly
3394 if (s->alignment_power == 2)
3395 while (s->next != NULL
3396 && s->next->alignment_power == 2
3397 && (s->next->flags & SEC_LOAD) != 0
3398 && CONST_STRNEQ (s->next->name, ".note"))
3403 for (s = abfd->sections; s != NULL; s = s->next)
3405 if (s->flags & SEC_THREAD_LOCAL)
3407 /* We need a PT_TLS segment. */
3413 /* Let the backend count up any program headers it might need. */
3414 bed = get_elf_backend_data (abfd);
3415 if (bed->elf_backend_additional_program_headers)
3419 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3425 return segs * bed->s->sizeof_phdr;
3428 /* Create a mapping from a set of sections to a program segment. */
3430 static struct elf_segment_map *
3431 make_mapping (bfd *abfd,
3432 asection **sections,
3437 struct elf_segment_map *m;
3442 amt = sizeof (struct elf_segment_map);
3443 amt += (to - from - 1) * sizeof (asection *);
3444 m = bfd_zalloc (abfd, amt);
3448 m->p_type = PT_LOAD;
3449 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3450 m->sections[i - from] = *hdrpp;
3451 m->count = to - from;
3453 if (from == 0 && phdr)
3455 /* Include the headers in the first PT_LOAD segment. */
3456 m->includes_filehdr = 1;
3457 m->includes_phdrs = 1;
3463 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3466 struct elf_segment_map *
3467 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3469 struct elf_segment_map *m;
3471 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3475 m->p_type = PT_DYNAMIC;
3477 m->sections[0] = dynsec;
3482 /* Possibly add or remove segments from the segment map. */
3485 elf_modify_segment_map (bfd *abfd,
3486 struct bfd_link_info *info,
3487 bfd_boolean remove_empty_load)
3489 struct elf_segment_map **m;
3490 const struct elf_backend_data *bed;
3492 /* The placement algorithm assumes that non allocated sections are
3493 not in PT_LOAD segments. We ensure this here by removing such
3494 sections from the segment map. We also remove excluded
3495 sections. Finally, any PT_LOAD segment without sections is
3497 m = &elf_tdata (abfd)->segment_map;
3500 unsigned int i, new_count;
3502 for (new_count = 0, i = 0; i < (*m)->count; i++)
3504 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3505 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3506 || (*m)->p_type != PT_LOAD))
3508 (*m)->sections[new_count] = (*m)->sections[i];
3512 (*m)->count = new_count;
3514 if (remove_empty_load && (*m)->p_type == PT_LOAD && (*m)->count == 0)
3520 bed = get_elf_backend_data (abfd);
3521 if (bed->elf_backend_modify_segment_map != NULL)
3523 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3530 /* Set up a mapping from BFD sections to program segments. */
3533 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3536 struct elf_segment_map *m;
3537 asection **sections = NULL;
3538 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3539 bfd_boolean no_user_phdrs;
3541 no_user_phdrs = elf_tdata (abfd)->segment_map == NULL;
3542 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
3546 struct elf_segment_map *mfirst;
3547 struct elf_segment_map **pm;
3550 unsigned int phdr_index;
3551 bfd_vma maxpagesize;
3553 bfd_boolean phdr_in_segment = TRUE;
3554 bfd_boolean writable;
3556 asection *first_tls = NULL;
3557 asection *dynsec, *eh_frame_hdr;
3560 /* Select the allocated sections, and sort them. */
3562 sections = bfd_malloc2 (bfd_count_sections (abfd), sizeof (asection *));
3563 if (sections == NULL)
3567 for (s = abfd->sections; s != NULL; s = s->next)
3569 if ((s->flags & SEC_ALLOC) != 0)
3575 BFD_ASSERT (i <= bfd_count_sections (abfd));
3578 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3580 /* Build the mapping. */
3585 /* If we have a .interp section, then create a PT_PHDR segment for
3586 the program headers and a PT_INTERP segment for the .interp
3588 s = bfd_get_section_by_name (abfd, ".interp");
3589 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3591 amt = sizeof (struct elf_segment_map);
3592 m = bfd_zalloc (abfd, amt);
3596 m->p_type = PT_PHDR;
3597 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3598 m->p_flags = PF_R | PF_X;
3599 m->p_flags_valid = 1;
3600 m->includes_phdrs = 1;
3605 amt = sizeof (struct elf_segment_map);
3606 m = bfd_zalloc (abfd, amt);
3610 m->p_type = PT_INTERP;
3618 /* Look through the sections. We put sections in the same program
3619 segment when the start of the second section can be placed within
3620 a few bytes of the end of the first section. */
3624 maxpagesize = bed->maxpagesize;
3626 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3628 && (dynsec->flags & SEC_LOAD) == 0)
3631 /* Deal with -Ttext or something similar such that the first section
3632 is not adjacent to the program headers. This is an
3633 approximation, since at this point we don't know exactly how many
3634 program headers we will need. */
3637 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
3639 if (phdr_size == (bfd_size_type) -1)
3640 phdr_size = get_program_header_size (abfd, info);
3641 if ((abfd->flags & D_PAGED) == 0
3642 || sections[0]->lma < phdr_size
3643 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3644 phdr_in_segment = FALSE;
3647 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3650 bfd_boolean new_segment;
3654 /* See if this section and the last one will fit in the same
3657 if (last_hdr == NULL)
3659 /* If we don't have a segment yet, then we don't need a new
3660 one (we build the last one after this loop). */
3661 new_segment = FALSE;
3663 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3665 /* If this section has a different relation between the
3666 virtual address and the load address, then we need a new
3670 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3671 < BFD_ALIGN (hdr->lma, maxpagesize))
3673 /* If putting this section in this segment would force us to
3674 skip a page in the segment, then we need a new segment. */
3677 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3678 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3680 /* We don't want to put a loadable section after a
3681 nonloadable section in the same segment.
3682 Consider .tbss sections as loadable for this purpose. */
3685 else if ((abfd->flags & D_PAGED) == 0)
3687 /* If the file is not demand paged, which means that we
3688 don't require the sections to be correctly aligned in the
3689 file, then there is no other reason for a new segment. */
3690 new_segment = FALSE;
3693 && (hdr->flags & SEC_READONLY) == 0
3694 && (((last_hdr->lma + last_size - 1)
3695 & ~(maxpagesize - 1))
3696 != (hdr->lma & ~(maxpagesize - 1))))
3698 /* We don't want to put a writable section in a read only
3699 segment, unless they are on the same page in memory
3700 anyhow. We already know that the last section does not
3701 bring us past the current section on the page, so the
3702 only case in which the new section is not on the same
3703 page as the previous section is when the previous section
3704 ends precisely on a page boundary. */
3709 /* Otherwise, we can use the same segment. */
3710 new_segment = FALSE;
3713 /* Allow interested parties a chance to override our decision. */
3714 if (last_hdr && info->callbacks->override_segment_assignment)
3715 new_segment = info->callbacks->override_segment_assignment (info, abfd, hdr, last_hdr, new_segment);
3719 if ((hdr->flags & SEC_READONLY) == 0)
3722 /* .tbss sections effectively have zero size. */
3723 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
3724 != SEC_THREAD_LOCAL)
3725 last_size = hdr->size;
3731 /* We need a new program segment. We must create a new program
3732 header holding all the sections from phdr_index until hdr. */
3734 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3741 if ((hdr->flags & SEC_READONLY) == 0)
3747 /* .tbss sections effectively have zero size. */
3748 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3749 last_size = hdr->size;
3753 phdr_in_segment = FALSE;
3756 /* Create a final PT_LOAD program segment. */
3757 if (last_hdr != NULL)
3759 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3767 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3770 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3777 /* For each batch of consecutive loadable .note sections,
3778 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
3779 because if we link together nonloadable .note sections and
3780 loadable .note sections, we will generate two .note sections
3781 in the output file. FIXME: Using names for section types is
3783 for (s = abfd->sections; s != NULL; s = s->next)
3785 if ((s->flags & SEC_LOAD) != 0
3786 && CONST_STRNEQ (s->name, ".note"))
3790 amt = sizeof (struct elf_segment_map);
3791 if (s->alignment_power == 2)
3792 for (s2 = s; s2->next != NULL; s2 = s2->next)
3794 if (s2->next->alignment_power == 2
3795 && (s2->next->flags & SEC_LOAD) != 0
3796 && CONST_STRNEQ (s2->next->name, ".note")
3797 && align_power (s2->vma + s2->size, 2)
3803 amt += (count - 1) * sizeof (asection *);
3804 m = bfd_zalloc (abfd, amt);
3808 m->p_type = PT_NOTE;
3812 m->sections[m->count - count--] = s;
3813 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3816 m->sections[m->count - 1] = s;
3817 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3821 if (s->flags & SEC_THREAD_LOCAL)
3829 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3834 amt = sizeof (struct elf_segment_map);
3835 amt += (tls_count - 1) * sizeof (asection *);
3836 m = bfd_zalloc (abfd, amt);
3841 m->count = tls_count;
3842 /* Mandated PF_R. */
3844 m->p_flags_valid = 1;
3845 for (i = 0; i < tls_count; ++i)
3847 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3848 m->sections[i] = first_tls;
3849 first_tls = first_tls->next;
3856 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3858 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3859 if (eh_frame_hdr != NULL
3860 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3862 amt = sizeof (struct elf_segment_map);
3863 m = bfd_zalloc (abfd, amt);
3867 m->p_type = PT_GNU_EH_FRAME;
3869 m->sections[0] = eh_frame_hdr->output_section;
3875 if (elf_tdata (abfd)->stack_flags)
3877 amt = sizeof (struct elf_segment_map);
3878 m = bfd_zalloc (abfd, amt);
3882 m->p_type = PT_GNU_STACK;
3883 m->p_flags = elf_tdata (abfd)->stack_flags;
3884 m->p_flags_valid = 1;
3890 if (dynsec != NULL && info->relro)
3892 /* We make a PT_GNU_RELRO segment only when there is a
3893 PT_DYNAMIC segment. */
3894 amt = sizeof (struct elf_segment_map);
3895 m = bfd_zalloc (abfd, amt);
3899 m->p_type = PT_GNU_RELRO;
3901 m->p_flags_valid = 1;
3908 elf_tdata (abfd)->segment_map = mfirst;
3911 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
3914 for (count = 0, m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3916 elf_tdata (abfd)->program_header_size = count * bed->s->sizeof_phdr;
3921 if (sections != NULL)
3926 /* Sort sections by address. */
3929 elf_sort_sections (const void *arg1, const void *arg2)
3931 const asection *sec1 = *(const asection **) arg1;
3932 const asection *sec2 = *(const asection **) arg2;
3933 bfd_size_type size1, size2;
3935 /* Sort by LMA first, since this is the address used to
3936 place the section into a segment. */
3937 if (sec1->lma < sec2->lma)
3939 else if (sec1->lma > sec2->lma)
3942 /* Then sort by VMA. Normally the LMA and the VMA will be
3943 the same, and this will do nothing. */
3944 if (sec1->vma < sec2->vma)
3946 else if (sec1->vma > sec2->vma)
3949 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3951 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3957 /* If the indicies are the same, do not return 0
3958 here, but continue to try the next comparison. */
3959 if (sec1->target_index - sec2->target_index != 0)
3960 return sec1->target_index - sec2->target_index;
3965 else if (TOEND (sec2))
3970 /* Sort by size, to put zero sized sections
3971 before others at the same address. */
3973 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
3974 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
3981 return sec1->target_index - sec2->target_index;
3984 /* Ian Lance Taylor writes:
3986 We shouldn't be using % with a negative signed number. That's just
3987 not good. We have to make sure either that the number is not
3988 negative, or that the number has an unsigned type. When the types
3989 are all the same size they wind up as unsigned. When file_ptr is a
3990 larger signed type, the arithmetic winds up as signed long long,
3993 What we're trying to say here is something like ``increase OFF by
3994 the least amount that will cause it to be equal to the VMA modulo
3996 /* In other words, something like:
3998 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3999 off_offset = off % bed->maxpagesize;
4000 if (vma_offset < off_offset)
4001 adjustment = vma_offset + bed->maxpagesize - off_offset;
4003 adjustment = vma_offset - off_offset;
4005 which can can be collapsed into the expression below. */
4008 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4010 return ((vma - off) % maxpagesize);
4014 print_segment_map (const struct elf_segment_map *m)
4017 const char *pt = get_segment_type (m->p_type);
4022 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
4023 sprintf (buf, "LOPROC+%7.7x",
4024 (unsigned int) (m->p_type - PT_LOPROC));
4025 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
4026 sprintf (buf, "LOOS+%7.7x",
4027 (unsigned int) (m->p_type - PT_LOOS));
4029 snprintf (buf, sizeof (buf), "%8.8x",
4030 (unsigned int) m->p_type);
4033 fprintf (stderr, "%s:", pt);
4034 for (j = 0; j < m->count; j++)
4035 fprintf (stderr, " %s", m->sections [j]->name);
4039 /* Assign file positions to the sections based on the mapping from
4040 sections to segments. This function also sets up some fields in
4044 assign_file_positions_for_load_sections (bfd *abfd,
4045 struct bfd_link_info *link_info)
4047 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4048 struct elf_segment_map *m;
4049 Elf_Internal_Phdr *phdrs;
4050 Elf_Internal_Phdr *p;
4052 bfd_size_type maxpagesize;
4056 if (link_info == NULL
4057 && !elf_modify_segment_map (abfd, link_info, FALSE))
4061 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4064 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4065 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4066 elf_elfheader (abfd)->e_phnum = alloc;
4068 if (elf_tdata (abfd)->program_header_size == (bfd_size_type) -1)
4069 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4071 BFD_ASSERT (elf_tdata (abfd)->program_header_size
4072 >= alloc * bed->s->sizeof_phdr);
4076 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4080 phdrs = bfd_alloc2 (abfd, alloc, sizeof (Elf_Internal_Phdr));
4081 elf_tdata (abfd)->phdr = phdrs;
4086 if ((abfd->flags & D_PAGED) != 0)
4087 maxpagesize = bed->maxpagesize;
4089 off = bed->s->sizeof_ehdr;
4090 off += alloc * bed->s->sizeof_phdr;
4092 for (m = elf_tdata (abfd)->segment_map, p = phdrs, j = 0;
4094 m = m->next, p++, j++)
4098 bfd_boolean no_contents;
4100 /* If elf_segment_map is not from map_sections_to_segments, the
4101 sections may not be correctly ordered. NOTE: sorting should
4102 not be done to the PT_NOTE section of a corefile, which may
4103 contain several pseudo-sections artificially created by bfd.
4104 Sorting these pseudo-sections breaks things badly. */
4106 && !(elf_elfheader (abfd)->e_type == ET_CORE
4107 && m->p_type == PT_NOTE))
4108 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4111 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4112 number of sections with contents contributing to both p_filesz
4113 and p_memsz, followed by a number of sections with no contents
4114 that just contribute to p_memsz. In this loop, OFF tracks next
4115 available file offset for PT_LOAD and PT_NOTE segments. */
4116 p->p_type = m->p_type;
4117 p->p_flags = m->p_flags;
4122 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4124 if (m->p_paddr_valid)
4125 p->p_paddr = m->p_paddr;
4126 else if (m->count == 0)
4129 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
4131 if (p->p_type == PT_LOAD
4132 && (abfd->flags & D_PAGED) != 0)
4134 /* p_align in demand paged PT_LOAD segments effectively stores
4135 the maximum page size. When copying an executable with
4136 objcopy, we set m->p_align from the input file. Use this
4137 value for maxpagesize rather than bed->maxpagesize, which
4138 may be different. Note that we use maxpagesize for PT_TLS
4139 segment alignment later in this function, so we are relying
4140 on at least one PT_LOAD segment appearing before a PT_TLS
4142 if (m->p_align_valid)
4143 maxpagesize = m->p_align;
4145 p->p_align = maxpagesize;
4147 else if (m->count == 0)
4148 p->p_align = 1 << bed->s->log_file_align;
4149 else if (m->p_align_valid)
4150 p->p_align = m->p_align;
4154 no_contents = FALSE;
4156 if (p->p_type == PT_LOAD
4159 bfd_size_type align;
4160 unsigned int align_power = 0;
4162 if (m->p_align_valid)
4166 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4168 unsigned int secalign;
4170 secalign = bfd_get_section_alignment (abfd, *secpp);
4171 if (secalign > align_power)
4172 align_power = secalign;
4174 align = (bfd_size_type) 1 << align_power;
4175 if (align < maxpagesize)
4176 align = maxpagesize;
4179 for (i = 0; i < m->count; i++)
4180 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4181 /* If we aren't making room for this section, then
4182 it must be SHT_NOBITS regardless of what we've
4183 set via struct bfd_elf_special_section. */
4184 elf_section_type (m->sections[i]) = SHT_NOBITS;
4186 /* Find out whether this segment contains any loadable
4187 sections. If the first section isn't loadable, the same
4188 holds for any other sections. */
4190 while (elf_section_type (m->sections[i]) == SHT_NOBITS)
4192 /* If a segment starts with .tbss, we need to look
4193 at the next section to decide whether the segment
4194 has any loadable sections. */
4195 if ((elf_section_flags (m->sections[i]) & SHF_TLS) == 0
4203 off_adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4207 /* We shouldn't need to align the segment on disk since
4208 the segment doesn't need file space, but the gABI
4209 arguably requires the alignment and glibc ld.so
4210 checks it. So to comply with the alignment
4211 requirement but not waste file space, we adjust
4212 p_offset for just this segment. (OFF_ADJUST is
4213 subtracted from OFF later.) This may put p_offset
4214 past the end of file, but that shouldn't matter. */
4219 /* Make sure the .dynamic section is the first section in the
4220 PT_DYNAMIC segment. */
4221 else if (p->p_type == PT_DYNAMIC
4223 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4226 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4228 bfd_set_error (bfd_error_bad_value);
4236 if (m->includes_filehdr)
4238 if (!m->p_flags_valid)
4240 p->p_filesz = bed->s->sizeof_ehdr;
4241 p->p_memsz = bed->s->sizeof_ehdr;
4244 BFD_ASSERT (p->p_type == PT_LOAD);
4246 if (p->p_vaddr < (bfd_vma) off)
4248 (*_bfd_error_handler)
4249 (_("%B: Not enough room for program headers, try linking with -N"),
4251 bfd_set_error (bfd_error_bad_value);
4256 if (!m->p_paddr_valid)
4261 if (m->includes_phdrs)
4263 if (!m->p_flags_valid)
4266 if (!m->includes_filehdr)
4268 p->p_offset = bed->s->sizeof_ehdr;
4272 BFD_ASSERT (p->p_type == PT_LOAD);
4273 p->p_vaddr -= off - p->p_offset;
4274 if (!m->p_paddr_valid)
4275 p->p_paddr -= off - p->p_offset;
4279 p->p_filesz += alloc * bed->s->sizeof_phdr;
4280 p->p_memsz += alloc * bed->s->sizeof_phdr;
4283 if (p->p_type == PT_LOAD
4284 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4286 if (!m->includes_filehdr && !m->includes_phdrs)
4292 adjust = off - (p->p_offset + p->p_filesz);
4294 p->p_filesz += adjust;
4295 p->p_memsz += adjust;
4299 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4300 maps. Set filepos for sections in PT_LOAD segments, and in
4301 core files, for sections in PT_NOTE segments.
4302 assign_file_positions_for_non_load_sections will set filepos
4303 for other sections and update p_filesz for other segments. */
4304 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4307 bfd_size_type align;
4308 Elf_Internal_Shdr *this_hdr;
4311 this_hdr = &elf_section_data (sec)->this_hdr;
4312 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4314 if (p->p_type == PT_LOAD
4315 || p->p_type == PT_TLS)
4317 bfd_signed_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
4319 if (this_hdr->sh_type != SHT_NOBITS
4320 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4321 && ((this_hdr->sh_flags & SHF_TLS) == 0
4322 || p->p_type == PT_TLS)))
4326 (*_bfd_error_handler)
4327 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4328 abfd, sec, (unsigned long) sec->lma);
4331 p->p_memsz += adjust;
4333 if (this_hdr->sh_type != SHT_NOBITS)
4336 p->p_filesz += adjust;
4341 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4343 /* The section at i == 0 is the one that actually contains
4347 this_hdr->sh_offset = sec->filepos = off;
4348 off += this_hdr->sh_size;
4349 p->p_filesz = this_hdr->sh_size;
4355 /* The rest are fake sections that shouldn't be written. */
4364 if (p->p_type == PT_LOAD)
4366 this_hdr->sh_offset = sec->filepos = off;
4367 if (this_hdr->sh_type != SHT_NOBITS)
4368 off += this_hdr->sh_size;
4371 if (this_hdr->sh_type != SHT_NOBITS)
4373 p->p_filesz += this_hdr->sh_size;
4374 /* A load section without SHF_ALLOC is something like
4375 a note section in a PT_NOTE segment. These take
4376 file space but are not loaded into memory. */
4377 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4378 p->p_memsz += this_hdr->sh_size;
4380 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4382 if (p->p_type == PT_TLS)
4383 p->p_memsz += this_hdr->sh_size;
4385 /* .tbss is special. It doesn't contribute to p_memsz of
4387 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
4388 p->p_memsz += this_hdr->sh_size;
4391 if (align > p->p_align
4392 && !m->p_align_valid
4393 && (p->p_type != PT_LOAD
4394 || (abfd->flags & D_PAGED) == 0))
4398 if (!m->p_flags_valid)
4401 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4403 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4409 /* Check that all sections are in a PT_LOAD segment.
4410 Don't check funky gdb generated core files. */
4411 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4412 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4414 Elf_Internal_Shdr *this_hdr;
4418 this_hdr = &(elf_section_data(sec)->this_hdr);
4419 if (this_hdr->sh_size != 0
4420 && !ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, p))
4422 (*_bfd_error_handler)
4423 (_("%B: section `%A' can't be allocated in segment %d"),
4425 print_segment_map (m);
4426 bfd_set_error (bfd_error_bad_value);
4432 elf_tdata (abfd)->next_file_pos = off;
4436 /* Assign file positions for the other sections. */
4439 assign_file_positions_for_non_load_sections (bfd *abfd,
4440 struct bfd_link_info *link_info)
4442 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4443 Elf_Internal_Shdr **i_shdrpp;
4444 Elf_Internal_Shdr **hdrpp;
4445 Elf_Internal_Phdr *phdrs;
4446 Elf_Internal_Phdr *p;
4447 struct elf_segment_map *m;
4448 bfd_vma filehdr_vaddr, filehdr_paddr;
4449 bfd_vma phdrs_vaddr, phdrs_paddr;
4451 unsigned int num_sec;
4455 i_shdrpp = elf_elfsections (abfd);
4456 num_sec = elf_numsections (abfd);
4457 off = elf_tdata (abfd)->next_file_pos;
4458 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4460 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4461 Elf_Internal_Shdr *hdr;
4464 if (hdr->bfd_section != NULL
4465 && (hdr->bfd_section->filepos != 0
4466 || (hdr->sh_type == SHT_NOBITS
4467 && hdr->contents == NULL)))
4468 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
4469 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4471 if (hdr->sh_size != 0)
4472 ((*_bfd_error_handler)
4473 (_("%B: warning: allocated section `%s' not in segment"),
4475 (hdr->bfd_section == NULL
4477 : hdr->bfd_section->name)));
4478 /* We don't need to page align empty sections. */
4479 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
4480 off += vma_page_aligned_bias (hdr->sh_addr, off,
4483 off += vma_page_aligned_bias (hdr->sh_addr, off,
4485 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4488 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4489 && hdr->bfd_section == NULL)
4490 || hdr == i_shdrpp[tdata->symtab_section]
4491 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4492 || hdr == i_shdrpp[tdata->strtab_section])
4493 hdr->sh_offset = -1;
4495 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4497 if (i == SHN_LORESERVE - 1)
4499 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4500 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4504 /* Now that we have set the section file positions, we can set up
4505 the file positions for the non PT_LOAD segments. */
4509 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4511 phdrs = elf_tdata (abfd)->phdr;
4512 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4517 if (p->p_type != PT_LOAD)
4520 if (m->includes_filehdr)
4522 filehdr_vaddr = p->p_vaddr;
4523 filehdr_paddr = p->p_paddr;
4525 if (m->includes_phdrs)
4527 phdrs_vaddr = p->p_vaddr;
4528 phdrs_paddr = p->p_paddr;
4529 if (m->includes_filehdr)
4531 phdrs_vaddr += bed->s->sizeof_ehdr;
4532 phdrs_paddr += bed->s->sizeof_ehdr;
4537 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4543 if (p->p_type != PT_LOAD
4544 && (p->p_type != PT_NOTE
4545 || bfd_get_format (abfd) != bfd_core))
4547 Elf_Internal_Shdr *hdr;
4550 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4552 sect = m->sections[m->count - 1];
4553 hdr = &elf_section_data (sect)->this_hdr;
4554 p->p_filesz = sect->filepos - m->sections[0]->filepos;
4555 if (hdr->sh_type != SHT_NOBITS)
4556 p->p_filesz += hdr->sh_size;
4558 if (p->p_type == PT_GNU_RELRO)
4560 /* When we get here, we are copying executable
4561 or shared library. But we need to use the same
4563 Elf_Internal_Phdr *lp;
4565 for (lp = phdrs; lp < phdrs + count; ++lp)
4567 if (lp->p_type == PT_LOAD
4568 && lp->p_paddr == p->p_paddr)
4572 if (lp < phdrs + count)
4574 /* We should use p_size if it is valid since it
4575 may contain the first few bytes of the next
4576 SEC_ALLOC section. */
4577 if (m->p_size_valid)
4578 p->p_filesz = m->p_size;
4581 p->p_vaddr = lp->p_vaddr;
4582 p->p_offset = lp->p_offset;
4583 p->p_memsz = p->p_filesz;
4590 p->p_offset = m->sections[0]->filepos;
4595 if (m->includes_filehdr)
4597 p->p_vaddr = filehdr_vaddr;
4598 if (! m->p_paddr_valid)
4599 p->p_paddr = filehdr_paddr;
4601 else if (m->includes_phdrs)
4603 p->p_vaddr = phdrs_vaddr;
4604 if (! m->p_paddr_valid)
4605 p->p_paddr = phdrs_paddr;
4607 else if (p->p_type == PT_GNU_RELRO)
4609 Elf_Internal_Phdr *lp;
4611 for (lp = phdrs; lp < phdrs + count; ++lp)
4613 if (lp->p_type == PT_LOAD
4614 && lp->p_vaddr <= link_info->relro_end
4615 && lp->p_vaddr >= link_info->relro_start
4616 && (lp->p_vaddr + lp->p_filesz
4617 >= link_info->relro_end))
4621 if (lp < phdrs + count
4622 && link_info->relro_end > lp->p_vaddr)
4624 p->p_vaddr = lp->p_vaddr;
4625 p->p_paddr = lp->p_paddr;
4626 p->p_offset = lp->p_offset;
4627 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4628 p->p_memsz = p->p_filesz;
4630 p->p_flags = (lp->p_flags & ~PF_W);
4634 memset (p, 0, sizeof *p);
4635 p->p_type = PT_NULL;
4641 elf_tdata (abfd)->next_file_pos = off;
4646 /* Work out the file positions of all the sections. This is called by
4647 _bfd_elf_compute_section_file_positions. All the section sizes and
4648 VMAs must be known before this is called.
4650 Reloc sections come in two flavours: Those processed specially as
4651 "side-channel" data attached to a section to which they apply, and
4652 those that bfd doesn't process as relocations. The latter sort are
4653 stored in a normal bfd section by bfd_section_from_shdr. We don't
4654 consider the former sort here, unless they form part of the loadable
4655 image. Reloc sections not assigned here will be handled later by
4656 assign_file_positions_for_relocs.
4658 We also don't set the positions of the .symtab and .strtab here. */
4661 assign_file_positions_except_relocs (bfd *abfd,
4662 struct bfd_link_info *link_info)
4664 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4665 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4667 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4669 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4670 && bfd_get_format (abfd) != bfd_core)
4672 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4673 unsigned int num_sec = elf_numsections (abfd);
4674 Elf_Internal_Shdr **hdrpp;
4677 /* Start after the ELF header. */
4678 off = i_ehdrp->e_ehsize;
4680 /* We are not creating an executable, which means that we are
4681 not creating a program header, and that the actual order of
4682 the sections in the file is unimportant. */
4683 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4685 Elf_Internal_Shdr *hdr;
4688 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4689 && hdr->bfd_section == NULL)
4690 || i == tdata->symtab_section
4691 || i == tdata->symtab_shndx_section
4692 || i == tdata->strtab_section)
4694 hdr->sh_offset = -1;
4697 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4699 if (i == SHN_LORESERVE - 1)
4701 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4702 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4710 /* Assign file positions for the loaded sections based on the
4711 assignment of sections to segments. */
4712 if (!assign_file_positions_for_load_sections (abfd, link_info))
4715 /* And for non-load sections. */
4716 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
4719 if (bed->elf_backend_modify_program_headers != NULL)
4721 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
4725 /* Write out the program headers. */
4726 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
4727 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4728 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
4731 off = tdata->next_file_pos;
4734 /* Place the section headers. */
4735 off = align_file_position (off, 1 << bed->s->log_file_align);
4736 i_ehdrp->e_shoff = off;
4737 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4739 tdata->next_file_pos = off;
4745 prep_headers (bfd *abfd)
4747 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4748 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4749 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4750 struct elf_strtab_hash *shstrtab;
4751 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4753 i_ehdrp = elf_elfheader (abfd);
4754 i_shdrp = elf_elfsections (abfd);
4756 shstrtab = _bfd_elf_strtab_init ();
4757 if (shstrtab == NULL)
4760 elf_shstrtab (abfd) = shstrtab;
4762 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4763 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4764 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4765 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4767 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4768 i_ehdrp->e_ident[EI_DATA] =
4769 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4770 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4772 if ((abfd->flags & DYNAMIC) != 0)
4773 i_ehdrp->e_type = ET_DYN;
4774 else if ((abfd->flags & EXEC_P) != 0)
4775 i_ehdrp->e_type = ET_EXEC;
4776 else if (bfd_get_format (abfd) == bfd_core)
4777 i_ehdrp->e_type = ET_CORE;
4779 i_ehdrp->e_type = ET_REL;
4781 switch (bfd_get_arch (abfd))
4783 case bfd_arch_unknown:
4784 i_ehdrp->e_machine = EM_NONE;
4787 /* There used to be a long list of cases here, each one setting
4788 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4789 in the corresponding bfd definition. To avoid duplication,
4790 the switch was removed. Machines that need special handling
4791 can generally do it in elf_backend_final_write_processing(),
4792 unless they need the information earlier than the final write.
4793 Such need can generally be supplied by replacing the tests for
4794 e_machine with the conditions used to determine it. */
4796 i_ehdrp->e_machine = bed->elf_machine_code;
4799 i_ehdrp->e_version = bed->s->ev_current;
4800 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4802 /* No program header, for now. */
4803 i_ehdrp->e_phoff = 0;
4804 i_ehdrp->e_phentsize = 0;
4805 i_ehdrp->e_phnum = 0;
4807 /* Each bfd section is section header entry. */
4808 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4809 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4811 /* If we're building an executable, we'll need a program header table. */
4812 if (abfd->flags & EXEC_P)
4813 /* It all happens later. */
4817 i_ehdrp->e_phentsize = 0;
4819 i_ehdrp->e_phoff = 0;
4822 elf_tdata (abfd)->symtab_hdr.sh_name =
4823 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4824 elf_tdata (abfd)->strtab_hdr.sh_name =
4825 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4826 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4827 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4828 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4829 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4830 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4836 /* Assign file positions for all the reloc sections which are not part
4837 of the loadable file image. */
4840 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4843 unsigned int i, num_sec;
4844 Elf_Internal_Shdr **shdrpp;
4846 off = elf_tdata (abfd)->next_file_pos;
4848 num_sec = elf_numsections (abfd);
4849 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4851 Elf_Internal_Shdr *shdrp;
4854 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4855 && shdrp->sh_offset == -1)
4856 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4859 elf_tdata (abfd)->next_file_pos = off;
4863 _bfd_elf_write_object_contents (bfd *abfd)
4865 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4866 Elf_Internal_Ehdr *i_ehdrp;
4867 Elf_Internal_Shdr **i_shdrp;
4869 unsigned int count, num_sec;
4871 if (! abfd->output_has_begun
4872 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4875 i_shdrp = elf_elfsections (abfd);
4876 i_ehdrp = elf_elfheader (abfd);
4879 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4883 _bfd_elf_assign_file_positions_for_relocs (abfd);
4885 /* After writing the headers, we need to write the sections too... */
4886 num_sec = elf_numsections (abfd);
4887 for (count = 1; count < num_sec; count++)
4889 if (bed->elf_backend_section_processing)
4890 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4891 if (i_shdrp[count]->contents)
4893 bfd_size_type amt = i_shdrp[count]->sh_size;
4895 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4896 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4899 if (count == SHN_LORESERVE - 1)
4900 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4903 /* Write out the section header names. */
4904 if (elf_shstrtab (abfd) != NULL
4905 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4906 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
4909 if (bed->elf_backend_final_write_processing)
4910 (*bed->elf_backend_final_write_processing) (abfd,
4911 elf_tdata (abfd)->linker);
4913 if (!bed->s->write_shdrs_and_ehdr (abfd))
4916 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
4917 if (elf_tdata (abfd)->after_write_object_contents)
4918 return (*elf_tdata (abfd)->after_write_object_contents) (abfd);
4924 _bfd_elf_write_corefile_contents (bfd *abfd)
4926 /* Hopefully this can be done just like an object file. */
4927 return _bfd_elf_write_object_contents (abfd);
4930 /* Given a section, search the header to find them. */
4933 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4935 const struct elf_backend_data *bed;
4938 if (elf_section_data (asect) != NULL
4939 && elf_section_data (asect)->this_idx != 0)
4940 return elf_section_data (asect)->this_idx;
4942 if (bfd_is_abs_section (asect))
4944 else if (bfd_is_com_section (asect))
4946 else if (bfd_is_und_section (asect))
4951 bed = get_elf_backend_data (abfd);
4952 if (bed->elf_backend_section_from_bfd_section)
4956 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4961 bfd_set_error (bfd_error_nonrepresentable_section);
4966 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4970 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
4972 asymbol *asym_ptr = *asym_ptr_ptr;
4974 flagword flags = asym_ptr->flags;
4976 /* When gas creates relocations against local labels, it creates its
4977 own symbol for the section, but does put the symbol into the
4978 symbol chain, so udata is 0. When the linker is generating
4979 relocatable output, this section symbol may be for one of the
4980 input sections rather than the output section. */
4981 if (asym_ptr->udata.i == 0
4982 && (flags & BSF_SECTION_SYM)
4983 && asym_ptr->section)
4988 sec = asym_ptr->section;
4989 if (sec->owner != abfd && sec->output_section != NULL)
4990 sec = sec->output_section;
4991 if (sec->owner == abfd
4992 && (indx = sec->index) < elf_num_section_syms (abfd)
4993 && elf_section_syms (abfd)[indx] != NULL)
4994 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
4997 idx = asym_ptr->udata.i;
5001 /* This case can occur when using --strip-symbol on a symbol
5002 which is used in a relocation entry. */
5003 (*_bfd_error_handler)
5004 (_("%B: symbol `%s' required but not present"),
5005 abfd, bfd_asymbol_name (asym_ptr));
5006 bfd_set_error (bfd_error_no_symbols);
5013 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5014 (long) asym_ptr, asym_ptr->name, idx, flags,
5015 elf_symbol_flags (flags));
5023 /* Rewrite program header information. */
5026 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
5028 Elf_Internal_Ehdr *iehdr;
5029 struct elf_segment_map *map;
5030 struct elf_segment_map *map_first;
5031 struct elf_segment_map **pointer_to_map;
5032 Elf_Internal_Phdr *segment;
5035 unsigned int num_segments;
5036 bfd_boolean phdr_included = FALSE;
5037 bfd_vma maxpagesize;
5038 struct elf_segment_map *phdr_adjust_seg = NULL;
5039 unsigned int phdr_adjust_num = 0;
5040 const struct elf_backend_data *bed;
5042 bed = get_elf_backend_data (ibfd);
5043 iehdr = elf_elfheader (ibfd);
5046 pointer_to_map = &map_first;
5048 num_segments = elf_elfheader (ibfd)->e_phnum;
5049 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5051 /* Returns the end address of the segment + 1. */
5052 #define SEGMENT_END(segment, start) \
5053 (start + (segment->p_memsz > segment->p_filesz \
5054 ? segment->p_memsz : segment->p_filesz))
5056 #define SECTION_SIZE(section, segment) \
5057 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5058 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5059 ? section->size : 0)
5061 /* Returns TRUE if the given section is contained within
5062 the given segment. VMA addresses are compared. */
5063 #define IS_CONTAINED_BY_VMA(section, segment) \
5064 (section->vma >= segment->p_vaddr \
5065 && (section->vma + SECTION_SIZE (section, segment) \
5066 <= (SEGMENT_END (segment, segment->p_vaddr))))
5068 /* Returns TRUE if the given section is contained within
5069 the given segment. LMA addresses are compared. */
5070 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5071 (section->lma >= base \
5072 && (section->lma + SECTION_SIZE (section, segment) \
5073 <= SEGMENT_END (segment, base)))
5075 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5076 #define IS_COREFILE_NOTE(p, s) \
5077 (p->p_type == PT_NOTE \
5078 && bfd_get_format (ibfd) == bfd_core \
5079 && s->vma == 0 && s->lma == 0 \
5080 && (bfd_vma) s->filepos >= p->p_offset \
5081 && ((bfd_vma) s->filepos + s->size \
5082 <= p->p_offset + p->p_filesz))
5084 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5085 linker, which generates a PT_INTERP section with p_vaddr and
5086 p_memsz set to 0. */
5087 #define IS_SOLARIS_PT_INTERP(p, s) \
5089 && p->p_paddr == 0 \
5090 && p->p_memsz == 0 \
5091 && p->p_filesz > 0 \
5092 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5094 && (bfd_vma) s->filepos >= p->p_offset \
5095 && ((bfd_vma) s->filepos + s->size \
5096 <= p->p_offset + p->p_filesz))
5098 /* Decide if the given section should be included in the given segment.
5099 A section will be included if:
5100 1. It is within the address space of the segment -- we use the LMA
5101 if that is set for the segment and the VMA otherwise,
5102 2. It is an allocated segment,
5103 3. There is an output section associated with it,
5104 4. The section has not already been allocated to a previous segment.
5105 5. PT_GNU_STACK segments do not include any sections.
5106 6. PT_TLS segment includes only SHF_TLS sections.
5107 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5108 8. PT_DYNAMIC should not contain empty sections at the beginning
5109 (with the possible exception of .dynamic). */
5110 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5111 ((((segment->p_paddr \
5112 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5113 : IS_CONTAINED_BY_VMA (section, segment)) \
5114 && (section->flags & SEC_ALLOC) != 0) \
5115 || IS_COREFILE_NOTE (segment, section)) \
5116 && segment->p_type != PT_GNU_STACK \
5117 && (segment->p_type != PT_TLS \
5118 || (section->flags & SEC_THREAD_LOCAL)) \
5119 && (segment->p_type == PT_LOAD \
5120 || segment->p_type == PT_TLS \
5121 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5122 && (segment->p_type != PT_DYNAMIC \
5123 || SECTION_SIZE (section, segment) > 0 \
5124 || (segment->p_paddr \
5125 ? segment->p_paddr != section->lma \
5126 : segment->p_vaddr != section->vma) \
5127 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5129 && ! section->segment_mark)
5131 /* If the output section of a section in the input segment is NULL,
5132 it is removed from the corresponding output segment. */
5133 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5134 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5135 && section->output_section != NULL)
5137 /* Returns TRUE iff seg1 starts after the end of seg2. */
5138 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5139 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5141 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5142 their VMA address ranges and their LMA address ranges overlap.
5143 It is possible to have overlapping VMA ranges without overlapping LMA
5144 ranges. RedBoot images for example can have both .data and .bss mapped
5145 to the same VMA range, but with the .data section mapped to a different
5147 #define SEGMENT_OVERLAPS(seg1, seg2) \
5148 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5149 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5150 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5151 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5153 /* Initialise the segment mark field. */
5154 for (section = ibfd->sections; section != NULL; section = section->next)
5155 section->segment_mark = FALSE;
5157 /* Scan through the segments specified in the program header
5158 of the input BFD. For this first scan we look for overlaps
5159 in the loadable segments. These can be created by weird
5160 parameters to objcopy. Also, fix some solaris weirdness. */
5161 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5166 Elf_Internal_Phdr *segment2;
5168 if (segment->p_type == PT_INTERP)
5169 for (section = ibfd->sections; section; section = section->next)
5170 if (IS_SOLARIS_PT_INTERP (segment, section))
5172 /* Mininal change so that the normal section to segment
5173 assignment code will work. */
5174 segment->p_vaddr = section->vma;
5178 if (segment->p_type != PT_LOAD)
5180 /* Remove PT_GNU_RELRO segment. */
5181 if (segment->p_type == PT_GNU_RELRO)
5182 segment->p_type = PT_NULL;
5186 /* Determine if this segment overlaps any previous segments. */
5187 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
5189 bfd_signed_vma extra_length;
5191 if (segment2->p_type != PT_LOAD
5192 || ! SEGMENT_OVERLAPS (segment, segment2))
5195 /* Merge the two segments together. */
5196 if (segment2->p_vaddr < segment->p_vaddr)
5198 /* Extend SEGMENT2 to include SEGMENT and then delete
5201 SEGMENT_END (segment, segment->p_vaddr)
5202 - SEGMENT_END (segment2, segment2->p_vaddr);
5204 if (extra_length > 0)
5206 segment2->p_memsz += extra_length;
5207 segment2->p_filesz += extra_length;
5210 segment->p_type = PT_NULL;
5212 /* Since we have deleted P we must restart the outer loop. */
5214 segment = elf_tdata (ibfd)->phdr;
5219 /* Extend SEGMENT to include SEGMENT2 and then delete
5222 SEGMENT_END (segment2, segment2->p_vaddr)
5223 - SEGMENT_END (segment, segment->p_vaddr);
5225 if (extra_length > 0)
5227 segment->p_memsz += extra_length;
5228 segment->p_filesz += extra_length;
5231 segment2->p_type = PT_NULL;
5236 /* The second scan attempts to assign sections to segments. */
5237 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5241 unsigned int section_count;
5242 asection ** sections;
5243 asection * output_section;
5245 bfd_vma matching_lma;
5246 bfd_vma suggested_lma;
5249 asection * first_section;
5251 if (segment->p_type == PT_NULL)
5254 first_section = NULL;
5255 /* Compute how many sections might be placed into this segment. */
5256 for (section = ibfd->sections, section_count = 0;
5258 section = section->next)
5260 /* Find the first section in the input segment, which may be
5261 removed from the corresponding output segment. */
5262 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5264 if (first_section == NULL)
5265 first_section = section;
5266 if (section->output_section != NULL)
5271 /* Allocate a segment map big enough to contain
5272 all of the sections we have selected. */
5273 amt = sizeof (struct elf_segment_map);
5274 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5275 map = bfd_zalloc (obfd, amt);
5279 /* Initialise the fields of the segment map. Default to
5280 using the physical address of the segment in the input BFD. */
5282 map->p_type = segment->p_type;
5283 map->p_flags = segment->p_flags;
5284 map->p_flags_valid = 1;
5286 /* If the first section in the input segment is removed, there is
5287 no need to preserve segment physical address in the corresponding
5289 if (!first_section || first_section->output_section != NULL)
5291 map->p_paddr = segment->p_paddr;
5292 map->p_paddr_valid = 1;
5295 /* Determine if this segment contains the ELF file header
5296 and if it contains the program headers themselves. */
5297 map->includes_filehdr = (segment->p_offset == 0
5298 && segment->p_filesz >= iehdr->e_ehsize);
5300 map->includes_phdrs = 0;
5302 if (! phdr_included || segment->p_type != PT_LOAD)
5304 map->includes_phdrs =
5305 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5306 && (segment->p_offset + segment->p_filesz
5307 >= ((bfd_vma) iehdr->e_phoff
5308 + iehdr->e_phnum * iehdr->e_phentsize)));
5310 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5311 phdr_included = TRUE;
5314 if (section_count == 0)
5316 /* Special segments, such as the PT_PHDR segment, may contain
5317 no sections, but ordinary, loadable segments should contain
5318 something. They are allowed by the ELF spec however, so only
5319 a warning is produced. */
5320 if (segment->p_type == PT_LOAD)
5321 (*_bfd_error_handler)
5322 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5326 *pointer_to_map = map;
5327 pointer_to_map = &map->next;
5332 /* Now scan the sections in the input BFD again and attempt
5333 to add their corresponding output sections to the segment map.
5334 The problem here is how to handle an output section which has
5335 been moved (ie had its LMA changed). There are four possibilities:
5337 1. None of the sections have been moved.
5338 In this case we can continue to use the segment LMA from the
5341 2. All of the sections have been moved by the same amount.
5342 In this case we can change the segment's LMA to match the LMA
5343 of the first section.
5345 3. Some of the sections have been moved, others have not.
5346 In this case those sections which have not been moved can be
5347 placed in the current segment which will have to have its size,
5348 and possibly its LMA changed, and a new segment or segments will
5349 have to be created to contain the other sections.
5351 4. The sections have been moved, but not by the same amount.
5352 In this case we can change the segment's LMA to match the LMA
5353 of the first section and we will have to create a new segment
5354 or segments to contain the other sections.
5356 In order to save time, we allocate an array to hold the section
5357 pointers that we are interested in. As these sections get assigned
5358 to a segment, they are removed from this array. */
5360 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5361 to work around this long long bug. */
5362 sections = bfd_malloc2 (section_count, sizeof (asection *));
5363 if (sections == NULL)
5366 /* Step One: Scan for segment vs section LMA conflicts.
5367 Also add the sections to the section array allocated above.
5368 Also add the sections to the current segment. In the common
5369 case, where the sections have not been moved, this means that
5370 we have completely filled the segment, and there is nothing
5376 for (j = 0, section = ibfd->sections;
5378 section = section->next)
5380 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5382 output_section = section->output_section;
5384 sections[j ++] = section;
5386 /* The Solaris native linker always sets p_paddr to 0.
5387 We try to catch that case here, and set it to the
5388 correct value. Note - some backends require that
5389 p_paddr be left as zero. */
5390 if (segment->p_paddr == 0
5391 && segment->p_vaddr != 0
5392 && (! bed->want_p_paddr_set_to_zero)
5394 && output_section->lma != 0
5395 && (output_section->vma == (segment->p_vaddr
5396 + (map->includes_filehdr
5399 + (map->includes_phdrs
5401 * iehdr->e_phentsize)
5403 map->p_paddr = segment->p_vaddr;
5405 /* Match up the physical address of the segment with the
5406 LMA address of the output section. */
5407 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5408 || IS_COREFILE_NOTE (segment, section)
5409 || (bed->want_p_paddr_set_to_zero &&
5410 IS_CONTAINED_BY_VMA (output_section, segment)))
5412 if (matching_lma == 0 || output_section->lma < matching_lma)
5413 matching_lma = output_section->lma;
5415 /* We assume that if the section fits within the segment
5416 then it does not overlap any other section within that
5418 map->sections[isec ++] = output_section;
5420 else if (suggested_lma == 0)
5421 suggested_lma = output_section->lma;
5425 BFD_ASSERT (j == section_count);
5427 /* Step Two: Adjust the physical address of the current segment,
5429 if (isec == section_count)
5431 /* All of the sections fitted within the segment as currently
5432 specified. This is the default case. Add the segment to
5433 the list of built segments and carry on to process the next
5434 program header in the input BFD. */
5435 map->count = section_count;
5436 *pointer_to_map = map;
5437 pointer_to_map = &map->next;
5439 if (matching_lma != map->p_paddr
5440 && !map->includes_filehdr && !map->includes_phdrs)
5441 /* There is some padding before the first section in the
5442 segment. So, we must account for that in the output
5444 map->p_vaddr_offset = matching_lma - map->p_paddr;
5451 if (matching_lma != 0)
5453 /* At least one section fits inside the current segment.
5454 Keep it, but modify its physical address to match the
5455 LMA of the first section that fitted. */
5456 map->p_paddr = matching_lma;
5460 /* None of the sections fitted inside the current segment.
5461 Change the current segment's physical address to match
5462 the LMA of the first section. */
5463 map->p_paddr = suggested_lma;
5466 /* Offset the segment physical address from the lma
5467 to allow for space taken up by elf headers. */
5468 if (map->includes_filehdr)
5469 map->p_paddr -= iehdr->e_ehsize;
5471 if (map->includes_phdrs)
5473 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5475 /* iehdr->e_phnum is just an estimate of the number
5476 of program headers that we will need. Make a note
5477 here of the number we used and the segment we chose
5478 to hold these headers, so that we can adjust the
5479 offset when we know the correct value. */
5480 phdr_adjust_num = iehdr->e_phnum;
5481 phdr_adjust_seg = map;
5485 /* Step Three: Loop over the sections again, this time assigning
5486 those that fit to the current segment and removing them from the
5487 sections array; but making sure not to leave large gaps. Once all
5488 possible sections have been assigned to the current segment it is
5489 added to the list of built segments and if sections still remain
5490 to be assigned, a new segment is constructed before repeating
5498 /* Fill the current segment with sections that fit. */
5499 for (j = 0; j < section_count; j++)
5501 section = sections[j];
5503 if (section == NULL)
5506 output_section = section->output_section;
5508 BFD_ASSERT (output_section != NULL);
5510 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5511 || IS_COREFILE_NOTE (segment, section))
5513 if (map->count == 0)
5515 /* If the first section in a segment does not start at
5516 the beginning of the segment, then something is
5518 if (output_section->lma !=
5520 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5521 + (map->includes_phdrs
5522 ? iehdr->e_phnum * iehdr->e_phentsize
5528 asection * prev_sec;
5530 prev_sec = map->sections[map->count - 1];
5532 /* If the gap between the end of the previous section
5533 and the start of this section is more than
5534 maxpagesize then we need to start a new segment. */
5535 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5537 < BFD_ALIGN (output_section->lma, maxpagesize))
5538 || ((prev_sec->lma + prev_sec->size)
5539 > output_section->lma))
5541 if (suggested_lma == 0)
5542 suggested_lma = output_section->lma;
5548 map->sections[map->count++] = output_section;
5551 section->segment_mark = TRUE;
5553 else if (suggested_lma == 0)
5554 suggested_lma = output_section->lma;
5557 BFD_ASSERT (map->count > 0);
5559 /* Add the current segment to the list of built segments. */
5560 *pointer_to_map = map;
5561 pointer_to_map = &map->next;
5563 if (isec < section_count)
5565 /* We still have not allocated all of the sections to
5566 segments. Create a new segment here, initialise it
5567 and carry on looping. */
5568 amt = sizeof (struct elf_segment_map);
5569 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5570 map = bfd_alloc (obfd, amt);
5577 /* Initialise the fields of the segment map. Set the physical
5578 physical address to the LMA of the first section that has
5579 not yet been assigned. */
5581 map->p_type = segment->p_type;
5582 map->p_flags = segment->p_flags;
5583 map->p_flags_valid = 1;
5584 map->p_paddr = suggested_lma;
5585 map->p_paddr_valid = 1;
5586 map->includes_filehdr = 0;
5587 map->includes_phdrs = 0;
5590 while (isec < section_count);
5595 /* The Solaris linker creates program headers in which all the
5596 p_paddr fields are zero. When we try to objcopy or strip such a
5597 file, we get confused. Check for this case, and if we find it
5598 reset the p_paddr_valid fields. */
5599 for (map = map_first; map != NULL; map = map->next)
5600 if (map->p_paddr != 0)
5603 for (map = map_first; map != NULL; map = map->next)
5604 map->p_paddr_valid = 0;
5606 elf_tdata (obfd)->segment_map = map_first;
5608 /* If we had to estimate the number of program headers that were
5609 going to be needed, then check our estimate now and adjust
5610 the offset if necessary. */
5611 if (phdr_adjust_seg != NULL)
5615 for (count = 0, map = map_first; map != NULL; map = map->next)
5618 if (count > phdr_adjust_num)
5619 phdr_adjust_seg->p_paddr
5620 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5625 #undef IS_CONTAINED_BY_VMA
5626 #undef IS_CONTAINED_BY_LMA
5627 #undef IS_COREFILE_NOTE
5628 #undef IS_SOLARIS_PT_INTERP
5629 #undef IS_SECTION_IN_INPUT_SEGMENT
5630 #undef INCLUDE_SECTION_IN_SEGMENT
5631 #undef SEGMENT_AFTER_SEGMENT
5632 #undef SEGMENT_OVERLAPS
5636 /* Copy ELF program header information. */
5639 copy_elf_program_header (bfd *ibfd, bfd *obfd)
5641 Elf_Internal_Ehdr *iehdr;
5642 struct elf_segment_map *map;
5643 struct elf_segment_map *map_first;
5644 struct elf_segment_map **pointer_to_map;
5645 Elf_Internal_Phdr *segment;
5647 unsigned int num_segments;
5648 bfd_boolean phdr_included = FALSE;
5650 iehdr = elf_elfheader (ibfd);
5653 pointer_to_map = &map_first;
5655 num_segments = elf_elfheader (ibfd)->e_phnum;
5656 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5661 unsigned int section_count;
5663 Elf_Internal_Shdr *this_hdr;
5664 asection *first_section = NULL;
5665 asection *lowest_section = NULL;
5667 /* FIXME: Do we need to copy PT_NULL segment? */
5668 if (segment->p_type == PT_NULL)
5671 /* Compute how many sections are in this segment. */
5672 for (section = ibfd->sections, section_count = 0;
5674 section = section->next)
5676 this_hdr = &(elf_section_data(section)->this_hdr);
5677 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5680 first_section = lowest_section = section;
5681 if (section->lma < lowest_section->lma)
5682 lowest_section = section;
5687 /* Allocate a segment map big enough to contain
5688 all of the sections we have selected. */
5689 amt = sizeof (struct elf_segment_map);
5690 if (section_count != 0)
5691 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5692 map = bfd_zalloc (obfd, amt);
5696 /* Initialize the fields of the output segment map with the
5699 map->p_type = segment->p_type;
5700 map->p_flags = segment->p_flags;
5701 map->p_flags_valid = 1;
5702 map->p_paddr = segment->p_paddr;
5703 map->p_paddr_valid = 1;
5704 map->p_align = segment->p_align;
5705 map->p_align_valid = 1;
5706 map->p_vaddr_offset = 0;
5708 if (map->p_type == PT_GNU_RELRO
5709 && segment->p_filesz == segment->p_memsz)
5711 /* The PT_GNU_RELRO segment may contain the first a few
5712 bytes in the .got.plt section even if the whole .got.plt
5713 section isn't in the PT_GNU_RELRO segment. We won't
5714 change the size of the PT_GNU_RELRO segment. */
5715 map->p_size = segment->p_filesz;
5716 map->p_size_valid = 1;
5719 /* Determine if this segment contains the ELF file header
5720 and if it contains the program headers themselves. */
5721 map->includes_filehdr = (segment->p_offset == 0
5722 && segment->p_filesz >= iehdr->e_ehsize);
5724 map->includes_phdrs = 0;
5725 if (! phdr_included || segment->p_type != PT_LOAD)
5727 map->includes_phdrs =
5728 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5729 && (segment->p_offset + segment->p_filesz
5730 >= ((bfd_vma) iehdr->e_phoff
5731 + iehdr->e_phnum * iehdr->e_phentsize)));
5733 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5734 phdr_included = TRUE;
5737 if (!map->includes_phdrs && !map->includes_filehdr)
5738 /* There is some other padding before the first section. */
5739 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
5740 - segment->p_paddr);
5742 if (section_count != 0)
5744 unsigned int isec = 0;
5746 for (section = first_section;
5748 section = section->next)
5750 this_hdr = &(elf_section_data(section)->this_hdr);
5751 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5753 map->sections[isec++] = section->output_section;
5754 if (isec == section_count)
5760 map->count = section_count;
5761 *pointer_to_map = map;
5762 pointer_to_map = &map->next;
5765 elf_tdata (obfd)->segment_map = map_first;
5769 /* Copy private BFD data. This copies or rewrites ELF program header
5773 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5775 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5776 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5779 if (elf_tdata (ibfd)->phdr == NULL)
5782 if (ibfd->xvec == obfd->xvec)
5784 /* Check to see if any sections in the input BFD
5785 covered by ELF program header have changed. */
5786 Elf_Internal_Phdr *segment;
5787 asection *section, *osec;
5788 unsigned int i, num_segments;
5789 Elf_Internal_Shdr *this_hdr;
5791 /* Initialize the segment mark field. */
5792 for (section = obfd->sections; section != NULL;
5793 section = section->next)
5794 section->segment_mark = FALSE;
5796 num_segments = elf_elfheader (ibfd)->e_phnum;
5797 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5801 /* PR binutils/3535. The Solaris linker always sets the p_paddr
5802 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
5803 which severly confuses things, so always regenerate the segment
5804 map in this case. */
5805 if (segment->p_paddr == 0
5806 && segment->p_memsz == 0
5807 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
5810 for (section = ibfd->sections;
5811 section != NULL; section = section->next)
5813 /* We mark the output section so that we know it comes
5814 from the input BFD. */
5815 osec = section->output_section;
5817 osec->segment_mark = TRUE;
5819 /* Check if this section is covered by the segment. */
5820 this_hdr = &(elf_section_data(section)->this_hdr);
5821 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5823 /* FIXME: Check if its output section is changed or
5824 removed. What else do we need to check? */
5826 || section->flags != osec->flags
5827 || section->lma != osec->lma
5828 || section->vma != osec->vma
5829 || section->size != osec->size
5830 || section->rawsize != osec->rawsize
5831 || section->alignment_power != osec->alignment_power)
5837 /* Check to see if any output section do not come from the
5839 for (section = obfd->sections; section != NULL;
5840 section = section->next)
5842 if (section->segment_mark == FALSE)
5845 section->segment_mark = FALSE;
5848 return copy_elf_program_header (ibfd, obfd);
5852 return rewrite_elf_program_header (ibfd, obfd);
5855 /* Initialize private output section information from input section. */
5858 _bfd_elf_init_private_section_data (bfd *ibfd,
5862 struct bfd_link_info *link_info)
5865 Elf_Internal_Shdr *ihdr, *ohdr;
5866 bfd_boolean need_group = link_info == NULL || link_info->relocatable;
5868 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5869 || obfd->xvec->flavour != bfd_target_elf_flavour)
5872 /* Don't copy the output ELF section type from input if the
5873 output BFD section flags have been set to something different.
5874 elf_fake_sections will set ELF section type based on BFD
5876 if (elf_section_type (osec) == SHT_NULL
5877 && (osec->flags == isec->flags || !osec->flags))
5878 elf_section_type (osec) = elf_section_type (isec);
5880 /* FIXME: Is this correct for all OS/PROC specific flags? */
5881 elf_section_flags (osec) |= (elf_section_flags (isec)
5882 & (SHF_MASKOS | SHF_MASKPROC));
5884 /* Set things up for objcopy and relocatable link. The output
5885 SHT_GROUP section will have its elf_next_in_group pointing back
5886 to the input group members. Ignore linker created group section.
5887 See elfNN_ia64_object_p in elfxx-ia64.c. */
5890 if (elf_sec_group (isec) == NULL
5891 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
5893 if (elf_section_flags (isec) & SHF_GROUP)
5894 elf_section_flags (osec) |= SHF_GROUP;
5895 elf_next_in_group (osec) = elf_next_in_group (isec);
5896 elf_group_name (osec) = elf_group_name (isec);
5900 ihdr = &elf_section_data (isec)->this_hdr;
5902 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
5903 don't use the output section of the linked-to section since it
5904 may be NULL at this point. */
5905 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
5907 ohdr = &elf_section_data (osec)->this_hdr;
5908 ohdr->sh_flags |= SHF_LINK_ORDER;
5909 elf_linked_to_section (osec) = elf_linked_to_section (isec);
5912 osec->use_rela_p = isec->use_rela_p;
5917 /* Copy private section information. This copies over the entsize
5918 field, and sometimes the info field. */
5921 _bfd_elf_copy_private_section_data (bfd *ibfd,
5926 Elf_Internal_Shdr *ihdr, *ohdr;
5928 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5929 || obfd->xvec->flavour != bfd_target_elf_flavour)
5932 ihdr = &elf_section_data (isec)->this_hdr;
5933 ohdr = &elf_section_data (osec)->this_hdr;
5935 ohdr->sh_entsize = ihdr->sh_entsize;
5937 if (ihdr->sh_type == SHT_SYMTAB
5938 || ihdr->sh_type == SHT_DYNSYM
5939 || ihdr->sh_type == SHT_GNU_verneed
5940 || ihdr->sh_type == SHT_GNU_verdef)
5941 ohdr->sh_info = ihdr->sh_info;
5943 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
5947 /* Copy private header information. */
5950 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
5954 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5955 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5958 /* Copy over private BFD data if it has not already been copied.
5959 This must be done here, rather than in the copy_private_bfd_data
5960 entry point, because the latter is called after the section
5961 contents have been set, which means that the program headers have
5962 already been worked out. */
5963 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5965 if (! copy_private_bfd_data (ibfd, obfd))
5969 /* _bfd_elf_copy_private_section_data copied over the SHF_GROUP flag
5970 but this might be wrong if we deleted the group section. */
5971 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
5972 if (elf_section_type (isec) == SHT_GROUP
5973 && isec->output_section == NULL)
5975 asection *first = elf_next_in_group (isec);
5976 asection *s = first;
5979 if (s->output_section != NULL)
5981 elf_section_flags (s->output_section) &= ~SHF_GROUP;
5982 elf_group_name (s->output_section) = NULL;
5984 s = elf_next_in_group (s);
5993 /* Copy private symbol information. If this symbol is in a section
5994 which we did not map into a BFD section, try to map the section
5995 index correctly. We use special macro definitions for the mapped
5996 section indices; these definitions are interpreted by the
5997 swap_out_syms function. */
5999 #define MAP_ONESYMTAB (SHN_HIOS + 1)
6000 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
6001 #define MAP_STRTAB (SHN_HIOS + 3)
6002 #define MAP_SHSTRTAB (SHN_HIOS + 4)
6003 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
6006 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
6011 elf_symbol_type *isym, *osym;
6013 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6014 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6017 isym = elf_symbol_from (ibfd, isymarg);
6018 osym = elf_symbol_from (obfd, osymarg);
6022 && bfd_is_abs_section (isym->symbol.section))
6026 shndx = isym->internal_elf_sym.st_shndx;
6027 if (shndx == elf_onesymtab (ibfd))
6028 shndx = MAP_ONESYMTAB;
6029 else if (shndx == elf_dynsymtab (ibfd))
6030 shndx = MAP_DYNSYMTAB;
6031 else if (shndx == elf_tdata (ibfd)->strtab_section)
6033 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
6034 shndx = MAP_SHSTRTAB;
6035 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
6036 shndx = MAP_SYM_SHNDX;
6037 osym->internal_elf_sym.st_shndx = shndx;
6043 /* Swap out the symbols. */
6046 swap_out_syms (bfd *abfd,
6047 struct bfd_strtab_hash **sttp,
6050 const struct elf_backend_data *bed;
6053 struct bfd_strtab_hash *stt;
6054 Elf_Internal_Shdr *symtab_hdr;
6055 Elf_Internal_Shdr *symtab_shndx_hdr;
6056 Elf_Internal_Shdr *symstrtab_hdr;
6057 bfd_byte *outbound_syms;
6058 bfd_byte *outbound_shndx;
6061 bfd_boolean name_local_sections;
6063 if (!elf_map_symbols (abfd))
6066 /* Dump out the symtabs. */
6067 stt = _bfd_elf_stringtab_init ();
6071 bed = get_elf_backend_data (abfd);
6072 symcount = bfd_get_symcount (abfd);
6073 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6074 symtab_hdr->sh_type = SHT_SYMTAB;
6075 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6076 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6077 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
6078 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
6080 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6081 symstrtab_hdr->sh_type = SHT_STRTAB;
6083 outbound_syms = bfd_alloc2 (abfd, 1 + symcount, bed->s->sizeof_sym);
6084 if (outbound_syms == NULL)
6086 _bfd_stringtab_free (stt);
6089 symtab_hdr->contents = outbound_syms;
6091 outbound_shndx = NULL;
6092 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6093 if (symtab_shndx_hdr->sh_name != 0)
6095 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6096 outbound_shndx = bfd_zalloc2 (abfd, 1 + symcount,
6097 sizeof (Elf_External_Sym_Shndx));
6098 if (outbound_shndx == NULL)
6100 _bfd_stringtab_free (stt);
6104 symtab_shndx_hdr->contents = outbound_shndx;
6105 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6106 symtab_shndx_hdr->sh_size = amt;
6107 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6108 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6111 /* Now generate the data (for "contents"). */
6113 /* Fill in zeroth symbol and swap it out. */
6114 Elf_Internal_Sym sym;
6120 sym.st_shndx = SHN_UNDEF;
6121 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6122 outbound_syms += bed->s->sizeof_sym;
6123 if (outbound_shndx != NULL)
6124 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6128 = (bed->elf_backend_name_local_section_symbols
6129 && bed->elf_backend_name_local_section_symbols (abfd));
6131 syms = bfd_get_outsymbols (abfd);
6132 for (idx = 0; idx < symcount; idx++)
6134 Elf_Internal_Sym sym;
6135 bfd_vma value = syms[idx]->value;
6136 elf_symbol_type *type_ptr;
6137 flagword flags = syms[idx]->flags;
6140 if (!name_local_sections
6141 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6143 /* Local section symbols have no name. */
6148 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6151 if (sym.st_name == (unsigned long) -1)
6153 _bfd_stringtab_free (stt);
6158 type_ptr = elf_symbol_from (abfd, syms[idx]);
6160 if ((flags & BSF_SECTION_SYM) == 0
6161 && bfd_is_com_section (syms[idx]->section))
6163 /* ELF common symbols put the alignment into the `value' field,
6164 and the size into the `size' field. This is backwards from
6165 how BFD handles it, so reverse it here. */
6166 sym.st_size = value;
6167 if (type_ptr == NULL
6168 || type_ptr->internal_elf_sym.st_value == 0)
6169 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6171 sym.st_value = type_ptr->internal_elf_sym.st_value;
6172 sym.st_shndx = _bfd_elf_section_from_bfd_section
6173 (abfd, syms[idx]->section);
6177 asection *sec = syms[idx]->section;
6180 if (sec->output_section)
6182 value += sec->output_offset;
6183 sec = sec->output_section;
6186 /* Don't add in the section vma for relocatable output. */
6187 if (! relocatable_p)
6189 sym.st_value = value;
6190 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6192 if (bfd_is_abs_section (sec)
6194 && type_ptr->internal_elf_sym.st_shndx != 0)
6196 /* This symbol is in a real ELF section which we did
6197 not create as a BFD section. Undo the mapping done
6198 by copy_private_symbol_data. */
6199 shndx = type_ptr->internal_elf_sym.st_shndx;
6203 shndx = elf_onesymtab (abfd);
6206 shndx = elf_dynsymtab (abfd);
6209 shndx = elf_tdata (abfd)->strtab_section;
6212 shndx = elf_tdata (abfd)->shstrtab_section;
6215 shndx = elf_tdata (abfd)->symtab_shndx_section;
6223 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6229 /* Writing this would be a hell of a lot easier if
6230 we had some decent documentation on bfd, and
6231 knew what to expect of the library, and what to
6232 demand of applications. For example, it
6233 appears that `objcopy' might not set the
6234 section of a symbol to be a section that is
6235 actually in the output file. */
6236 sec2 = bfd_get_section_by_name (abfd, sec->name);
6239 _bfd_error_handler (_("\
6240 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6241 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6243 bfd_set_error (bfd_error_invalid_operation);
6244 _bfd_stringtab_free (stt);
6248 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6249 BFD_ASSERT (shndx != -1);
6253 sym.st_shndx = shndx;
6256 if ((flags & BSF_THREAD_LOCAL) != 0)
6258 else if ((flags & BSF_FUNCTION) != 0)
6260 else if ((flags & BSF_OBJECT) != 0)
6262 else if ((flags & BSF_RELC) != 0)
6264 else if ((flags & BSF_SRELC) != 0)
6269 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6272 /* Processor-specific types. */
6273 if (type_ptr != NULL
6274 && bed->elf_backend_get_symbol_type)
6275 type = ((*bed->elf_backend_get_symbol_type)
6276 (&type_ptr->internal_elf_sym, type));
6278 if (flags & BSF_SECTION_SYM)
6280 if (flags & BSF_GLOBAL)
6281 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6283 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6285 else if (bfd_is_com_section (syms[idx]->section))
6286 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6287 else if (bfd_is_und_section (syms[idx]->section))
6288 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6292 else if (flags & BSF_FILE)
6293 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6296 int bind = STB_LOCAL;
6298 if (flags & BSF_LOCAL)
6300 else if (flags & BSF_WEAK)
6302 else if (flags & BSF_GLOBAL)
6305 sym.st_info = ELF_ST_INFO (bind, type);
6308 if (type_ptr != NULL)
6309 sym.st_other = type_ptr->internal_elf_sym.st_other;
6313 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6314 outbound_syms += bed->s->sizeof_sym;
6315 if (outbound_shndx != NULL)
6316 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6320 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6321 symstrtab_hdr->sh_type = SHT_STRTAB;
6323 symstrtab_hdr->sh_flags = 0;
6324 symstrtab_hdr->sh_addr = 0;
6325 symstrtab_hdr->sh_entsize = 0;
6326 symstrtab_hdr->sh_link = 0;
6327 symstrtab_hdr->sh_info = 0;
6328 symstrtab_hdr->sh_addralign = 1;
6333 /* Return the number of bytes required to hold the symtab vector.
6335 Note that we base it on the count plus 1, since we will null terminate
6336 the vector allocated based on this size. However, the ELF symbol table
6337 always has a dummy entry as symbol #0, so it ends up even. */
6340 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6344 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6346 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6347 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6349 symtab_size -= sizeof (asymbol *);
6355 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6359 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6361 if (elf_dynsymtab (abfd) == 0)
6363 bfd_set_error (bfd_error_invalid_operation);
6367 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6368 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6370 symtab_size -= sizeof (asymbol *);
6376 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6379 return (asect->reloc_count + 1) * sizeof (arelent *);
6382 /* Canonicalize the relocs. */
6385 _bfd_elf_canonicalize_reloc (bfd *abfd,
6392 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6394 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6397 tblptr = section->relocation;
6398 for (i = 0; i < section->reloc_count; i++)
6399 *relptr++ = tblptr++;
6403 return section->reloc_count;
6407 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6409 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6410 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6413 bfd_get_symcount (abfd) = symcount;
6418 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6419 asymbol **allocation)
6421 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6422 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6425 bfd_get_dynamic_symcount (abfd) = symcount;
6429 /* Return the size required for the dynamic reloc entries. Any loadable
6430 section that was actually installed in the BFD, and has type SHT_REL
6431 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6432 dynamic reloc section. */
6435 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6440 if (elf_dynsymtab (abfd) == 0)
6442 bfd_set_error (bfd_error_invalid_operation);
6446 ret = sizeof (arelent *);
6447 for (s = abfd->sections; s != NULL; s = s->next)
6448 if ((s->flags & SEC_LOAD) != 0
6449 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6450 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6451 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6452 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6453 * sizeof (arelent *));
6458 /* Canonicalize the dynamic relocation entries. Note that we return the
6459 dynamic relocations as a single block, although they are actually
6460 associated with particular sections; the interface, which was
6461 designed for SunOS style shared libraries, expects that there is only
6462 one set of dynamic relocs. Any loadable section that was actually
6463 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6464 dynamic symbol table, is considered to be a dynamic reloc section. */
6467 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6471 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6475 if (elf_dynsymtab (abfd) == 0)
6477 bfd_set_error (bfd_error_invalid_operation);
6481 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6483 for (s = abfd->sections; s != NULL; s = s->next)
6485 if ((s->flags & SEC_LOAD) != 0
6486 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6487 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6488 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6493 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6495 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6497 for (i = 0; i < count; i++)
6508 /* Read in the version information. */
6511 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6513 bfd_byte *contents = NULL;
6514 unsigned int freeidx = 0;
6516 if (elf_dynverref (abfd) != 0)
6518 Elf_Internal_Shdr *hdr;
6519 Elf_External_Verneed *everneed;
6520 Elf_Internal_Verneed *iverneed;
6522 bfd_byte *contents_end;
6524 hdr = &elf_tdata (abfd)->dynverref_hdr;
6526 elf_tdata (abfd)->verref = bfd_zalloc2 (abfd, hdr->sh_info,
6527 sizeof (Elf_Internal_Verneed));
6528 if (elf_tdata (abfd)->verref == NULL)
6531 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6533 contents = bfd_malloc (hdr->sh_size);
6534 if (contents == NULL)
6536 error_return_verref:
6537 elf_tdata (abfd)->verref = NULL;
6538 elf_tdata (abfd)->cverrefs = 0;
6541 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6542 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6543 goto error_return_verref;
6545 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6546 goto error_return_verref;
6548 BFD_ASSERT (sizeof (Elf_External_Verneed)
6549 == sizeof (Elf_External_Vernaux));
6550 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6551 everneed = (Elf_External_Verneed *) contents;
6552 iverneed = elf_tdata (abfd)->verref;
6553 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6555 Elf_External_Vernaux *evernaux;
6556 Elf_Internal_Vernaux *ivernaux;
6559 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6561 iverneed->vn_bfd = abfd;
6563 iverneed->vn_filename =
6564 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6566 if (iverneed->vn_filename == NULL)
6567 goto error_return_verref;
6569 if (iverneed->vn_cnt == 0)
6570 iverneed->vn_auxptr = NULL;
6573 iverneed->vn_auxptr = bfd_alloc2 (abfd, iverneed->vn_cnt,
6574 sizeof (Elf_Internal_Vernaux));
6575 if (iverneed->vn_auxptr == NULL)
6576 goto error_return_verref;
6579 if (iverneed->vn_aux
6580 > (size_t) (contents_end - (bfd_byte *) everneed))
6581 goto error_return_verref;
6583 evernaux = ((Elf_External_Vernaux *)
6584 ((bfd_byte *) everneed + iverneed->vn_aux));
6585 ivernaux = iverneed->vn_auxptr;
6586 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6588 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6590 ivernaux->vna_nodename =
6591 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6592 ivernaux->vna_name);
6593 if (ivernaux->vna_nodename == NULL)
6594 goto error_return_verref;
6596 if (j + 1 < iverneed->vn_cnt)
6597 ivernaux->vna_nextptr = ivernaux + 1;
6599 ivernaux->vna_nextptr = NULL;
6601 if (ivernaux->vna_next
6602 > (size_t) (contents_end - (bfd_byte *) evernaux))
6603 goto error_return_verref;
6605 evernaux = ((Elf_External_Vernaux *)
6606 ((bfd_byte *) evernaux + ivernaux->vna_next));
6608 if (ivernaux->vna_other > freeidx)
6609 freeidx = ivernaux->vna_other;
6612 if (i + 1 < hdr->sh_info)
6613 iverneed->vn_nextref = iverneed + 1;
6615 iverneed->vn_nextref = NULL;
6617 if (iverneed->vn_next
6618 > (size_t) (contents_end - (bfd_byte *) everneed))
6619 goto error_return_verref;
6621 everneed = ((Elf_External_Verneed *)
6622 ((bfd_byte *) everneed + iverneed->vn_next));
6629 if (elf_dynverdef (abfd) != 0)
6631 Elf_Internal_Shdr *hdr;
6632 Elf_External_Verdef *everdef;
6633 Elf_Internal_Verdef *iverdef;
6634 Elf_Internal_Verdef *iverdefarr;
6635 Elf_Internal_Verdef iverdefmem;
6637 unsigned int maxidx;
6638 bfd_byte *contents_end_def, *contents_end_aux;
6640 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6642 contents = bfd_malloc (hdr->sh_size);
6643 if (contents == NULL)
6645 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6646 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6649 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
6652 BFD_ASSERT (sizeof (Elf_External_Verdef)
6653 >= sizeof (Elf_External_Verdaux));
6654 contents_end_def = contents + hdr->sh_size
6655 - sizeof (Elf_External_Verdef);
6656 contents_end_aux = contents + hdr->sh_size
6657 - sizeof (Elf_External_Verdaux);
6659 /* We know the number of entries in the section but not the maximum
6660 index. Therefore we have to run through all entries and find
6662 everdef = (Elf_External_Verdef *) contents;
6664 for (i = 0; i < hdr->sh_info; ++i)
6666 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6668 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6669 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6671 if (iverdefmem.vd_next
6672 > (size_t) (contents_end_def - (bfd_byte *) everdef))
6675 everdef = ((Elf_External_Verdef *)
6676 ((bfd_byte *) everdef + iverdefmem.vd_next));
6679 if (default_imported_symver)
6681 if (freeidx > maxidx)
6686 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, maxidx,
6687 sizeof (Elf_Internal_Verdef));
6688 if (elf_tdata (abfd)->verdef == NULL)
6691 elf_tdata (abfd)->cverdefs = maxidx;
6693 everdef = (Elf_External_Verdef *) contents;
6694 iverdefarr = elf_tdata (abfd)->verdef;
6695 for (i = 0; i < hdr->sh_info; i++)
6697 Elf_External_Verdaux *everdaux;
6698 Elf_Internal_Verdaux *iverdaux;
6701 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6703 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
6705 error_return_verdef:
6706 elf_tdata (abfd)->verdef = NULL;
6707 elf_tdata (abfd)->cverdefs = 0;
6711 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6712 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6714 iverdef->vd_bfd = abfd;
6716 if (iverdef->vd_cnt == 0)
6717 iverdef->vd_auxptr = NULL;
6720 iverdef->vd_auxptr = bfd_alloc2 (abfd, iverdef->vd_cnt,
6721 sizeof (Elf_Internal_Verdaux));
6722 if (iverdef->vd_auxptr == NULL)
6723 goto error_return_verdef;
6727 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
6728 goto error_return_verdef;
6730 everdaux = ((Elf_External_Verdaux *)
6731 ((bfd_byte *) everdef + iverdef->vd_aux));
6732 iverdaux = iverdef->vd_auxptr;
6733 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6735 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6737 iverdaux->vda_nodename =
6738 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6739 iverdaux->vda_name);
6740 if (iverdaux->vda_nodename == NULL)
6741 goto error_return_verdef;
6743 if (j + 1 < iverdef->vd_cnt)
6744 iverdaux->vda_nextptr = iverdaux + 1;
6746 iverdaux->vda_nextptr = NULL;
6748 if (iverdaux->vda_next
6749 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
6750 goto error_return_verdef;
6752 everdaux = ((Elf_External_Verdaux *)
6753 ((bfd_byte *) everdaux + iverdaux->vda_next));
6756 if (iverdef->vd_cnt)
6757 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6759 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
6760 iverdef->vd_nextdef = iverdef + 1;
6762 iverdef->vd_nextdef = NULL;
6764 everdef = ((Elf_External_Verdef *)
6765 ((bfd_byte *) everdef + iverdef->vd_next));
6771 else if (default_imported_symver)
6778 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, freeidx,
6779 sizeof (Elf_Internal_Verdef));
6780 if (elf_tdata (abfd)->verdef == NULL)
6783 elf_tdata (abfd)->cverdefs = freeidx;
6786 /* Create a default version based on the soname. */
6787 if (default_imported_symver)
6789 Elf_Internal_Verdef *iverdef;
6790 Elf_Internal_Verdaux *iverdaux;
6792 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6794 iverdef->vd_version = VER_DEF_CURRENT;
6795 iverdef->vd_flags = 0;
6796 iverdef->vd_ndx = freeidx;
6797 iverdef->vd_cnt = 1;
6799 iverdef->vd_bfd = abfd;
6801 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6802 if (iverdef->vd_nodename == NULL)
6803 goto error_return_verdef;
6804 iverdef->vd_nextdef = NULL;
6805 iverdef->vd_auxptr = bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
6806 if (iverdef->vd_auxptr == NULL)
6807 goto error_return_verdef;
6809 iverdaux = iverdef->vd_auxptr;
6810 iverdaux->vda_nodename = iverdef->vd_nodename;
6811 iverdaux->vda_nextptr = NULL;
6817 if (contents != NULL)
6823 _bfd_elf_make_empty_symbol (bfd *abfd)
6825 elf_symbol_type *newsym;
6826 bfd_size_type amt = sizeof (elf_symbol_type);
6828 newsym = bfd_zalloc (abfd, amt);
6833 newsym->symbol.the_bfd = abfd;
6834 return &newsym->symbol;
6839 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
6843 bfd_symbol_info (symbol, ret);
6846 /* Return whether a symbol name implies a local symbol. Most targets
6847 use this function for the is_local_label_name entry point, but some
6851 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
6854 /* Normal local symbols start with ``.L''. */
6855 if (name[0] == '.' && name[1] == 'L')
6858 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6859 DWARF debugging symbols starting with ``..''. */
6860 if (name[0] == '.' && name[1] == '.')
6863 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6864 emitting DWARF debugging output. I suspect this is actually a
6865 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6866 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6867 underscore to be emitted on some ELF targets). For ease of use,
6868 we treat such symbols as local. */
6869 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6876 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6877 asymbol *symbol ATTRIBUTE_UNUSED)
6884 _bfd_elf_set_arch_mach (bfd *abfd,
6885 enum bfd_architecture arch,
6886 unsigned long machine)
6888 /* If this isn't the right architecture for this backend, and this
6889 isn't the generic backend, fail. */
6890 if (arch != get_elf_backend_data (abfd)->arch
6891 && arch != bfd_arch_unknown
6892 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6895 return bfd_default_set_arch_mach (abfd, arch, machine);
6898 /* Find the function to a particular section and offset,
6899 for error reporting. */
6902 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6906 const char **filename_ptr,
6907 const char **functionname_ptr)
6909 const char *filename;
6910 asymbol *func, *file;
6913 /* ??? Given multiple file symbols, it is impossible to reliably
6914 choose the right file name for global symbols. File symbols are
6915 local symbols, and thus all file symbols must sort before any
6916 global symbols. The ELF spec may be interpreted to say that a
6917 file symbol must sort before other local symbols, but currently
6918 ld -r doesn't do this. So, for ld -r output, it is possible to
6919 make a better choice of file name for local symbols by ignoring
6920 file symbols appearing after a given local symbol. */
6921 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
6927 state = nothing_seen;
6929 for (p = symbols; *p != NULL; p++)
6933 q = (elf_symbol_type *) *p;
6935 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6941 if (state == symbol_seen)
6942 state = file_after_symbol_seen;
6946 if (bfd_get_section (&q->symbol) == section
6947 && q->symbol.value >= low_func
6948 && q->symbol.value <= offset)
6950 func = (asymbol *) q;
6951 low_func = q->symbol.value;
6954 && (ELF_ST_BIND (q->internal_elf_sym.st_info) == STB_LOCAL
6955 || state != file_after_symbol_seen))
6956 filename = bfd_asymbol_name (file);
6960 if (state == nothing_seen)
6961 state = symbol_seen;
6968 *filename_ptr = filename;
6969 if (functionname_ptr)
6970 *functionname_ptr = bfd_asymbol_name (func);
6975 /* Find the nearest line to a particular section and offset,
6976 for error reporting. */
6979 _bfd_elf_find_nearest_line (bfd *abfd,
6983 const char **filename_ptr,
6984 const char **functionname_ptr,
6985 unsigned int *line_ptr)
6989 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6990 filename_ptr, functionname_ptr,
6993 if (!*functionname_ptr)
6994 elf_find_function (abfd, section, symbols, offset,
6995 *filename_ptr ? NULL : filename_ptr,
7001 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
7002 filename_ptr, functionname_ptr,
7004 &elf_tdata (abfd)->dwarf2_find_line_info))
7006 if (!*functionname_ptr)
7007 elf_find_function (abfd, section, symbols, offset,
7008 *filename_ptr ? NULL : filename_ptr,
7014 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7015 &found, filename_ptr,
7016 functionname_ptr, line_ptr,
7017 &elf_tdata (abfd)->line_info))
7019 if (found && (*functionname_ptr || *line_ptr))
7022 if (symbols == NULL)
7025 if (! elf_find_function (abfd, section, symbols, offset,
7026 filename_ptr, functionname_ptr))
7033 /* Find the line for a symbol. */
7036 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
7037 const char **filename_ptr, unsigned int *line_ptr)
7039 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
7040 filename_ptr, line_ptr, 0,
7041 &elf_tdata (abfd)->dwarf2_find_line_info);
7044 /* After a call to bfd_find_nearest_line, successive calls to
7045 bfd_find_inliner_info can be used to get source information about
7046 each level of function inlining that terminated at the address
7047 passed to bfd_find_nearest_line. Currently this is only supported
7048 for DWARF2 with appropriate DWARF3 extensions. */
7051 _bfd_elf_find_inliner_info (bfd *abfd,
7052 const char **filename_ptr,
7053 const char **functionname_ptr,
7054 unsigned int *line_ptr)
7057 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7058 functionname_ptr, line_ptr,
7059 & elf_tdata (abfd)->dwarf2_find_line_info);
7064 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
7066 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7067 int ret = bed->s->sizeof_ehdr;
7069 if (!info->relocatable)
7071 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
7073 if (phdr_size == (bfd_size_type) -1)
7075 struct elf_segment_map *m;
7078 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
7079 phdr_size += bed->s->sizeof_phdr;
7082 phdr_size = get_program_header_size (abfd, info);
7085 elf_tdata (abfd)->program_header_size = phdr_size;
7093 _bfd_elf_set_section_contents (bfd *abfd,
7095 const void *location,
7097 bfd_size_type count)
7099 Elf_Internal_Shdr *hdr;
7102 if (! abfd->output_has_begun
7103 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7106 hdr = &elf_section_data (section)->this_hdr;
7107 pos = hdr->sh_offset + offset;
7108 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7109 || bfd_bwrite (location, count, abfd) != count)
7116 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7117 arelent *cache_ptr ATTRIBUTE_UNUSED,
7118 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7123 /* Try to convert a non-ELF reloc into an ELF one. */
7126 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7128 /* Check whether we really have an ELF howto. */
7130 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7132 bfd_reloc_code_real_type code;
7133 reloc_howto_type *howto;
7135 /* Alien reloc: Try to determine its type to replace it with an
7136 equivalent ELF reloc. */
7138 if (areloc->howto->pc_relative)
7140 switch (areloc->howto->bitsize)
7143 code = BFD_RELOC_8_PCREL;
7146 code = BFD_RELOC_12_PCREL;
7149 code = BFD_RELOC_16_PCREL;
7152 code = BFD_RELOC_24_PCREL;
7155 code = BFD_RELOC_32_PCREL;
7158 code = BFD_RELOC_64_PCREL;
7164 howto = bfd_reloc_type_lookup (abfd, code);
7166 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7168 if (howto->pcrel_offset)
7169 areloc->addend += areloc->address;
7171 areloc->addend -= areloc->address; /* addend is unsigned!! */
7176 switch (areloc->howto->bitsize)
7182 code = BFD_RELOC_14;
7185 code = BFD_RELOC_16;
7188 code = BFD_RELOC_26;
7191 code = BFD_RELOC_32;
7194 code = BFD_RELOC_64;
7200 howto = bfd_reloc_type_lookup (abfd, code);
7204 areloc->howto = howto;
7212 (*_bfd_error_handler)
7213 (_("%B: unsupported relocation type %s"),
7214 abfd, areloc->howto->name);
7215 bfd_set_error (bfd_error_bad_value);
7220 _bfd_elf_close_and_cleanup (bfd *abfd)
7222 if (bfd_get_format (abfd) == bfd_object)
7224 if (elf_tdata (abfd) != NULL && elf_shstrtab (abfd) != NULL)
7225 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7226 _bfd_dwarf2_cleanup_debug_info (abfd);
7229 return _bfd_generic_close_and_cleanup (abfd);
7232 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7233 in the relocation's offset. Thus we cannot allow any sort of sanity
7234 range-checking to interfere. There is nothing else to do in processing
7237 bfd_reloc_status_type
7238 _bfd_elf_rel_vtable_reloc_fn
7239 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7240 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7241 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7242 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7244 return bfd_reloc_ok;
7247 /* Elf core file support. Much of this only works on native
7248 toolchains, since we rely on knowing the
7249 machine-dependent procfs structure in order to pick
7250 out details about the corefile. */
7252 #ifdef HAVE_SYS_PROCFS_H
7253 # include <sys/procfs.h>
7256 /* FIXME: this is kinda wrong, but it's what gdb wants. */
7259 elfcore_make_pid (bfd *abfd)
7261 return ((elf_tdata (abfd)->core_lwpid << 16)
7262 + (elf_tdata (abfd)->core_pid));
7265 /* If there isn't a section called NAME, make one, using
7266 data from SECT. Note, this function will generate a
7267 reference to NAME, so you shouldn't deallocate or
7271 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7275 if (bfd_get_section_by_name (abfd, name) != NULL)
7278 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
7282 sect2->size = sect->size;
7283 sect2->filepos = sect->filepos;
7284 sect2->alignment_power = sect->alignment_power;
7288 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7289 actually creates up to two pseudosections:
7290 - For the single-threaded case, a section named NAME, unless
7291 such a section already exists.
7292 - For the multi-threaded case, a section named "NAME/PID", where
7293 PID is elfcore_make_pid (abfd).
7294 Both pseudosections have identical contents. */
7296 _bfd_elfcore_make_pseudosection (bfd *abfd,
7302 char *threaded_name;
7306 /* Build the section name. */
7308 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7309 len = strlen (buf) + 1;
7310 threaded_name = bfd_alloc (abfd, len);
7311 if (threaded_name == NULL)
7313 memcpy (threaded_name, buf, len);
7315 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
7320 sect->filepos = filepos;
7321 sect->alignment_power = 2;
7323 return elfcore_maybe_make_sect (abfd, name, sect);
7326 /* prstatus_t exists on:
7328 linux 2.[01] + glibc
7332 #if defined (HAVE_PRSTATUS_T)
7335 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7340 if (note->descsz == sizeof (prstatus_t))
7344 size = sizeof (prstat.pr_reg);
7345 offset = offsetof (prstatus_t, pr_reg);
7346 memcpy (&prstat, note->descdata, sizeof (prstat));
7348 /* Do not overwrite the core signal if it
7349 has already been set by another thread. */
7350 if (elf_tdata (abfd)->core_signal == 0)
7351 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7352 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7354 /* pr_who exists on:
7357 pr_who doesn't exist on:
7360 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7361 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7364 #if defined (HAVE_PRSTATUS32_T)
7365 else if (note->descsz == sizeof (prstatus32_t))
7367 /* 64-bit host, 32-bit corefile */
7368 prstatus32_t prstat;
7370 size = sizeof (prstat.pr_reg);
7371 offset = offsetof (prstatus32_t, pr_reg);
7372 memcpy (&prstat, note->descdata, sizeof (prstat));
7374 /* Do not overwrite the core signal if it
7375 has already been set by another thread. */
7376 if (elf_tdata (abfd)->core_signal == 0)
7377 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7378 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7380 /* pr_who exists on:
7383 pr_who doesn't exist on:
7386 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7387 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7390 #endif /* HAVE_PRSTATUS32_T */
7393 /* Fail - we don't know how to handle any other
7394 note size (ie. data object type). */
7398 /* Make a ".reg/999" section and a ".reg" section. */
7399 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7400 size, note->descpos + offset);
7402 #endif /* defined (HAVE_PRSTATUS_T) */
7404 /* Create a pseudosection containing the exact contents of NOTE. */
7406 elfcore_make_note_pseudosection (bfd *abfd,
7408 Elf_Internal_Note *note)
7410 return _bfd_elfcore_make_pseudosection (abfd, name,
7411 note->descsz, note->descpos);
7414 /* There isn't a consistent prfpregset_t across platforms,
7415 but it doesn't matter, because we don't have to pick this
7416 data structure apart. */
7419 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7421 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7424 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7425 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7429 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7431 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7434 #if defined (HAVE_PRPSINFO_T)
7435 typedef prpsinfo_t elfcore_psinfo_t;
7436 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7437 typedef prpsinfo32_t elfcore_psinfo32_t;
7441 #if defined (HAVE_PSINFO_T)
7442 typedef psinfo_t elfcore_psinfo_t;
7443 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7444 typedef psinfo32_t elfcore_psinfo32_t;
7448 /* return a malloc'ed copy of a string at START which is at
7449 most MAX bytes long, possibly without a terminating '\0'.
7450 the copy will always have a terminating '\0'. */
7453 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7456 char *end = memchr (start, '\0', max);
7464 dups = bfd_alloc (abfd, len + 1);
7468 memcpy (dups, start, len);
7474 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7476 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7478 if (note->descsz == sizeof (elfcore_psinfo_t))
7480 elfcore_psinfo_t psinfo;
7482 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7484 elf_tdata (abfd)->core_program
7485 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7486 sizeof (psinfo.pr_fname));
7488 elf_tdata (abfd)->core_command
7489 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7490 sizeof (psinfo.pr_psargs));
7492 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7493 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7495 /* 64-bit host, 32-bit corefile */
7496 elfcore_psinfo32_t psinfo;
7498 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7500 elf_tdata (abfd)->core_program
7501 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7502 sizeof (psinfo.pr_fname));
7504 elf_tdata (abfd)->core_command
7505 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7506 sizeof (psinfo.pr_psargs));
7512 /* Fail - we don't know how to handle any other
7513 note size (ie. data object type). */
7517 /* Note that for some reason, a spurious space is tacked
7518 onto the end of the args in some (at least one anyway)
7519 implementations, so strip it off if it exists. */
7522 char *command = elf_tdata (abfd)->core_command;
7523 int n = strlen (command);
7525 if (0 < n && command[n - 1] == ' ')
7526 command[n - 1] = '\0';
7531 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7533 #if defined (HAVE_PSTATUS_T)
7535 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7537 if (note->descsz == sizeof (pstatus_t)
7538 #if defined (HAVE_PXSTATUS_T)
7539 || note->descsz == sizeof (pxstatus_t)
7545 memcpy (&pstat, note->descdata, sizeof (pstat));
7547 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7549 #if defined (HAVE_PSTATUS32_T)
7550 else if (note->descsz == sizeof (pstatus32_t))
7552 /* 64-bit host, 32-bit corefile */
7555 memcpy (&pstat, note->descdata, sizeof (pstat));
7557 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7560 /* Could grab some more details from the "representative"
7561 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7562 NT_LWPSTATUS note, presumably. */
7566 #endif /* defined (HAVE_PSTATUS_T) */
7568 #if defined (HAVE_LWPSTATUS_T)
7570 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7572 lwpstatus_t lwpstat;
7578 if (note->descsz != sizeof (lwpstat)
7579 #if defined (HAVE_LWPXSTATUS_T)
7580 && note->descsz != sizeof (lwpxstatus_t)
7585 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7587 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7588 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7590 /* Make a ".reg/999" section. */
7592 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7593 len = strlen (buf) + 1;
7594 name = bfd_alloc (abfd, len);
7597 memcpy (name, buf, len);
7599 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7603 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7604 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7605 sect->filepos = note->descpos
7606 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7609 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7610 sect->size = sizeof (lwpstat.pr_reg);
7611 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7614 sect->alignment_power = 2;
7616 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7619 /* Make a ".reg2/999" section */
7621 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7622 len = strlen (buf) + 1;
7623 name = bfd_alloc (abfd, len);
7626 memcpy (name, buf, len);
7628 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7632 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7633 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7634 sect->filepos = note->descpos
7635 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7638 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7639 sect->size = sizeof (lwpstat.pr_fpreg);
7640 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7643 sect->alignment_power = 2;
7645 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7647 #endif /* defined (HAVE_LWPSTATUS_T) */
7650 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7657 int is_active_thread;
7660 if (note->descsz < 728)
7663 if (! CONST_STRNEQ (note->namedata, "win32"))
7666 type = bfd_get_32 (abfd, note->descdata);
7670 case 1 /* NOTE_INFO_PROCESS */:
7671 /* FIXME: need to add ->core_command. */
7672 /* process_info.pid */
7673 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 8);
7674 /* process_info.signal */
7675 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 12);
7678 case 2 /* NOTE_INFO_THREAD */:
7679 /* Make a ".reg/999" section. */
7680 /* thread_info.tid */
7681 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
7683 len = strlen (buf) + 1;
7684 name = bfd_alloc (abfd, len);
7688 memcpy (name, buf, len);
7690 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7694 /* sizeof (thread_info.thread_context) */
7696 /* offsetof (thread_info.thread_context) */
7697 sect->filepos = note->descpos + 12;
7698 sect->alignment_power = 2;
7700 /* thread_info.is_active_thread */
7701 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
7703 if (is_active_thread)
7704 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7708 case 3 /* NOTE_INFO_MODULE */:
7709 /* Make a ".module/xxxxxxxx" section. */
7710 /* module_info.base_address */
7711 base_addr = bfd_get_32 (abfd, note->descdata + 4);
7712 sprintf (buf, ".module/%08lx", (long) base_addr);
7714 len = strlen (buf) + 1;
7715 name = bfd_alloc (abfd, len);
7719 memcpy (name, buf, len);
7721 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7726 sect->size = note->descsz;
7727 sect->filepos = note->descpos;
7728 sect->alignment_power = 2;
7739 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7741 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7749 if (bed->elf_backend_grok_prstatus)
7750 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7752 #if defined (HAVE_PRSTATUS_T)
7753 return elfcore_grok_prstatus (abfd, note);
7758 #if defined (HAVE_PSTATUS_T)
7760 return elfcore_grok_pstatus (abfd, note);
7763 #if defined (HAVE_LWPSTATUS_T)
7765 return elfcore_grok_lwpstatus (abfd, note);
7768 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7769 return elfcore_grok_prfpreg (abfd, note);
7771 case NT_WIN32PSTATUS:
7772 return elfcore_grok_win32pstatus (abfd, note);
7774 case NT_PRXFPREG: /* Linux SSE extension */
7775 if (note->namesz == 6
7776 && strcmp (note->namedata, "LINUX") == 0)
7777 return elfcore_grok_prxfpreg (abfd, note);
7783 if (bed->elf_backend_grok_psinfo)
7784 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7786 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7787 return elfcore_grok_psinfo (abfd, note);
7794 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
7799 sect->size = note->descsz;
7800 sect->filepos = note->descpos;
7801 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7809 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
7811 elf_tdata (abfd)->build_id_size = note->descsz;
7812 elf_tdata (abfd)->build_id = bfd_alloc (abfd, note->descsz);
7813 if (elf_tdata (abfd)->build_id == NULL)
7816 memcpy (elf_tdata (abfd)->build_id, note->descdata, note->descsz);
7822 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
7829 case NT_GNU_BUILD_ID:
7830 return elfobj_grok_gnu_build_id (abfd, note);
7835 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
7839 cp = strchr (note->namedata, '@');
7842 *lwpidp = atoi(cp + 1);
7849 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
7851 /* Signal number at offset 0x08. */
7852 elf_tdata (abfd)->core_signal
7853 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7855 /* Process ID at offset 0x50. */
7856 elf_tdata (abfd)->core_pid
7857 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7859 /* Command name at 0x7c (max 32 bytes, including nul). */
7860 elf_tdata (abfd)->core_command
7861 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
7863 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
7868 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
7872 if (elfcore_netbsd_get_lwpid (note, &lwp))
7873 elf_tdata (abfd)->core_lwpid = lwp;
7875 if (note->type == NT_NETBSDCORE_PROCINFO)
7877 /* NetBSD-specific core "procinfo". Note that we expect to
7878 find this note before any of the others, which is fine,
7879 since the kernel writes this note out first when it
7880 creates a core file. */
7882 return elfcore_grok_netbsd_procinfo (abfd, note);
7885 /* As of Jan 2002 there are no other machine-independent notes
7886 defined for NetBSD core files. If the note type is less
7887 than the start of the machine-dependent note types, we don't
7890 if (note->type < NT_NETBSDCORE_FIRSTMACH)
7894 switch (bfd_get_arch (abfd))
7896 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7897 PT_GETFPREGS == mach+2. */
7899 case bfd_arch_alpha:
7900 case bfd_arch_sparc:
7903 case NT_NETBSDCORE_FIRSTMACH+0:
7904 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7906 case NT_NETBSDCORE_FIRSTMACH+2:
7907 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7913 /* On all other arch's, PT_GETREGS == mach+1 and
7914 PT_GETFPREGS == mach+3. */
7919 case NT_NETBSDCORE_FIRSTMACH+1:
7920 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7922 case NT_NETBSDCORE_FIRSTMACH+3:
7923 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7933 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
7935 void *ddata = note->descdata;
7942 /* nto_procfs_status 'pid' field is at offset 0. */
7943 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
7945 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7946 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
7948 /* nto_procfs_status 'flags' field is at offset 8. */
7949 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
7951 /* nto_procfs_status 'what' field is at offset 14. */
7952 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
7954 elf_tdata (abfd)->core_signal = sig;
7955 elf_tdata (abfd)->core_lwpid = *tid;
7958 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7959 do not come from signals so we make sure we set the current
7960 thread just in case. */
7961 if (flags & 0x00000080)
7962 elf_tdata (abfd)->core_lwpid = *tid;
7964 /* Make a ".qnx_core_status/%d" section. */
7965 sprintf (buf, ".qnx_core_status/%ld", *tid);
7967 name = bfd_alloc (abfd, strlen (buf) + 1);
7972 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7976 sect->size = note->descsz;
7977 sect->filepos = note->descpos;
7978 sect->alignment_power = 2;
7980 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7984 elfcore_grok_nto_regs (bfd *abfd,
7985 Elf_Internal_Note *note,
7993 /* Make a "(base)/%d" section. */
7994 sprintf (buf, "%s/%ld", base, tid);
7996 name = bfd_alloc (abfd, strlen (buf) + 1);
8001 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8005 sect->size = note->descsz;
8006 sect->filepos = note->descpos;
8007 sect->alignment_power = 2;
8009 /* This is the current thread. */
8010 if (elf_tdata (abfd)->core_lwpid == tid)
8011 return elfcore_maybe_make_sect (abfd, base, sect);
8016 #define BFD_QNT_CORE_INFO 7
8017 #define BFD_QNT_CORE_STATUS 8
8018 #define BFD_QNT_CORE_GREG 9
8019 #define BFD_QNT_CORE_FPREG 10
8022 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
8024 /* Every GREG section has a STATUS section before it. Store the
8025 tid from the previous call to pass down to the next gregs
8027 static long tid = 1;
8031 case BFD_QNT_CORE_INFO:
8032 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
8033 case BFD_QNT_CORE_STATUS:
8034 return elfcore_grok_nto_status (abfd, note, &tid);
8035 case BFD_QNT_CORE_GREG:
8036 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
8037 case BFD_QNT_CORE_FPREG:
8038 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
8045 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
8051 /* Use note name as section name. */
8053 name = bfd_alloc (abfd, len);
8056 memcpy (name, note->namedata, len);
8057 name[len - 1] = '\0';
8059 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8063 sect->size = note->descsz;
8064 sect->filepos = note->descpos;
8065 sect->alignment_power = 1;
8070 /* Function: elfcore_write_note
8073 buffer to hold note, and current size of buffer
8077 size of data for note
8079 Writes note to end of buffer. ELF64 notes are written exactly as
8080 for ELF32, despite the current (as of 2006) ELF gabi specifying
8081 that they ought to have 8-byte namesz and descsz field, and have
8082 8-byte alignment. Other writers, eg. Linux kernel, do the same.
8085 Pointer to realloc'd buffer, *BUFSIZ updated. */
8088 elfcore_write_note (bfd *abfd,
8096 Elf_External_Note *xnp;
8103 namesz = strlen (name) + 1;
8105 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
8107 buf = realloc (buf, *bufsiz + newspace);
8108 dest = buf + *bufsiz;
8109 *bufsiz += newspace;
8110 xnp = (Elf_External_Note *) dest;
8111 H_PUT_32 (abfd, namesz, xnp->namesz);
8112 H_PUT_32 (abfd, size, xnp->descsz);
8113 H_PUT_32 (abfd, type, xnp->type);
8117 memcpy (dest, name, namesz);
8125 memcpy (dest, input, size);
8135 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8137 elfcore_write_prpsinfo (bfd *abfd,
8143 const char *note_name = "CORE";
8144 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8146 if (bed->elf_backend_write_core_note != NULL)
8149 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8150 NT_PRPSINFO, fname, psargs);
8155 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8156 if (bed->s->elfclass == ELFCLASS32)
8158 #if defined (HAVE_PSINFO32_T)
8160 int note_type = NT_PSINFO;
8163 int note_type = NT_PRPSINFO;
8166 memset (&data, 0, sizeof (data));
8167 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8168 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8169 return elfcore_write_note (abfd, buf, bufsiz,
8170 note_name, note_type, &data, sizeof (data));
8175 #if defined (HAVE_PSINFO_T)
8177 int note_type = NT_PSINFO;
8180 int note_type = NT_PRPSINFO;
8183 memset (&data, 0, sizeof (data));
8184 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8185 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8186 return elfcore_write_note (abfd, buf, bufsiz,
8187 note_name, note_type, &data, sizeof (data));
8190 #endif /* PSINFO_T or PRPSINFO_T */
8192 #if defined (HAVE_PRSTATUS_T)
8194 elfcore_write_prstatus (bfd *abfd,
8201 const char *note_name = "CORE";
8202 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8204 if (bed->elf_backend_write_core_note != NULL)
8207 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8209 pid, cursig, gregs);
8214 #if defined (HAVE_PRSTATUS32_T)
8215 if (bed->s->elfclass == ELFCLASS32)
8217 prstatus32_t prstat;
8219 memset (&prstat, 0, sizeof (prstat));
8220 prstat.pr_pid = pid;
8221 prstat.pr_cursig = cursig;
8222 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8223 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8224 NT_PRSTATUS, &prstat, sizeof (prstat));
8231 memset (&prstat, 0, sizeof (prstat));
8232 prstat.pr_pid = pid;
8233 prstat.pr_cursig = cursig;
8234 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8235 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8236 NT_PRSTATUS, &prstat, sizeof (prstat));
8239 #endif /* HAVE_PRSTATUS_T */
8241 #if defined (HAVE_LWPSTATUS_T)
8243 elfcore_write_lwpstatus (bfd *abfd,
8250 lwpstatus_t lwpstat;
8251 const char *note_name = "CORE";
8253 memset (&lwpstat, 0, sizeof (lwpstat));
8254 lwpstat.pr_lwpid = pid >> 16;
8255 lwpstat.pr_cursig = cursig;
8256 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8257 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
8258 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8260 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
8261 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
8263 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
8264 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
8267 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8268 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
8270 #endif /* HAVE_LWPSTATUS_T */
8272 #if defined (HAVE_PSTATUS_T)
8274 elfcore_write_pstatus (bfd *abfd,
8278 int cursig ATTRIBUTE_UNUSED,
8279 const void *gregs ATTRIBUTE_UNUSED)
8281 const char *note_name = "CORE";
8282 #if defined (HAVE_PSTATUS32_T)
8283 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8285 if (bed->s->elfclass == ELFCLASS32)
8289 memset (&pstat, 0, sizeof (pstat));
8290 pstat.pr_pid = pid & 0xffff;
8291 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8292 NT_PSTATUS, &pstat, sizeof (pstat));
8300 memset (&pstat, 0, sizeof (pstat));
8301 pstat.pr_pid = pid & 0xffff;
8302 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8303 NT_PSTATUS, &pstat, sizeof (pstat));
8307 #endif /* HAVE_PSTATUS_T */
8310 elfcore_write_prfpreg (bfd *abfd,
8316 const char *note_name = "CORE";
8317 return elfcore_write_note (abfd, buf, bufsiz,
8318 note_name, NT_FPREGSET, fpregs, size);
8322 elfcore_write_prxfpreg (bfd *abfd,
8325 const void *xfpregs,
8328 char *note_name = "LINUX";
8329 return elfcore_write_note (abfd, buf, bufsiz,
8330 note_name, NT_PRXFPREG, xfpregs, size);
8334 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
8339 while (p < buf + size)
8341 /* FIXME: bad alignment assumption. */
8342 Elf_External_Note *xnp = (Elf_External_Note *) p;
8343 Elf_Internal_Note in;
8345 in.type = H_GET_32 (abfd, xnp->type);
8347 in.namesz = H_GET_32 (abfd, xnp->namesz);
8348 in.namedata = xnp->name;
8350 in.descsz = H_GET_32 (abfd, xnp->descsz);
8351 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
8352 in.descpos = offset + (in.descdata - buf);
8354 switch (bfd_get_format (abfd))
8360 if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
8362 if (! elfcore_grok_netbsd_note (abfd, &in))
8365 else if (CONST_STRNEQ (in.namedata, "QNX"))
8367 if (! elfcore_grok_nto_note (abfd, &in))
8370 else if (CONST_STRNEQ (in.namedata, "SPU/"))
8372 if (! elfcore_grok_spu_note (abfd, &in))
8377 if (! elfcore_grok_note (abfd, &in))
8383 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
8385 if (! elfobj_grok_gnu_note (abfd, &in))
8391 p = in.descdata + BFD_ALIGN (in.descsz, 4);
8398 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
8405 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
8408 buf = bfd_malloc (size);
8412 if (bfd_bread (buf, size, abfd) != size
8413 || !elf_parse_notes (abfd, buf, size, offset))
8423 /* Providing external access to the ELF program header table. */
8425 /* Return an upper bound on the number of bytes required to store a
8426 copy of ABFD's program header table entries. Return -1 if an error
8427 occurs; bfd_get_error will return an appropriate code. */
8430 bfd_get_elf_phdr_upper_bound (bfd *abfd)
8432 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8434 bfd_set_error (bfd_error_wrong_format);
8438 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
8441 /* Copy ABFD's program header table entries to *PHDRS. The entries
8442 will be stored as an array of Elf_Internal_Phdr structures, as
8443 defined in include/elf/internal.h. To find out how large the
8444 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8446 Return the number of program header table entries read, or -1 if an
8447 error occurs; bfd_get_error will return an appropriate code. */
8450 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
8454 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8456 bfd_set_error (bfd_error_wrong_format);
8460 num_phdrs = elf_elfheader (abfd)->e_phnum;
8461 memcpy (phdrs, elf_tdata (abfd)->phdr,
8462 num_phdrs * sizeof (Elf_Internal_Phdr));
8467 enum elf_reloc_type_class
8468 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
8470 return reloc_class_normal;
8473 /* For RELA architectures, return the relocation value for a
8474 relocation against a local symbol. */
8477 _bfd_elf_rela_local_sym (bfd *abfd,
8478 Elf_Internal_Sym *sym,
8480 Elf_Internal_Rela *rel)
8482 asection *sec = *psec;
8485 relocation = (sec->output_section->vma
8486 + sec->output_offset
8488 if ((sec->flags & SEC_MERGE)
8489 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
8490 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
8493 _bfd_merged_section_offset (abfd, psec,
8494 elf_section_data (sec)->sec_info,
8495 sym->st_value + rel->r_addend);
8498 /* If we have changed the section, and our original section is
8499 marked with SEC_EXCLUDE, it means that the original
8500 SEC_MERGE section has been completely subsumed in some
8501 other SEC_MERGE section. In this case, we need to leave
8502 some info around for --emit-relocs. */
8503 if ((sec->flags & SEC_EXCLUDE) != 0)
8504 sec->kept_section = *psec;
8507 rel->r_addend -= relocation;
8508 rel->r_addend += sec->output_section->vma + sec->output_offset;
8514 _bfd_elf_rel_local_sym (bfd *abfd,
8515 Elf_Internal_Sym *sym,
8519 asection *sec = *psec;
8521 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
8522 return sym->st_value + addend;
8524 return _bfd_merged_section_offset (abfd, psec,
8525 elf_section_data (sec)->sec_info,
8526 sym->st_value + addend);
8530 _bfd_elf_section_offset (bfd *abfd,
8531 struct bfd_link_info *info,
8535 switch (sec->sec_info_type)
8537 case ELF_INFO_TYPE_STABS:
8538 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
8540 case ELF_INFO_TYPE_EH_FRAME:
8541 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
8547 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8548 reconstruct an ELF file by reading the segments out of remote memory
8549 based on the ELF file header at EHDR_VMA and the ELF program headers it
8550 points to. If not null, *LOADBASEP is filled in with the difference
8551 between the VMAs from which the segments were read, and the VMAs the
8552 file headers (and hence BFD's idea of each section's VMA) put them at.
8554 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8555 remote memory at target address VMA into the local buffer at MYADDR; it
8556 should return zero on success or an `errno' code on failure. TEMPL must
8557 be a BFD for an ELF target with the word size and byte order found in
8558 the remote memory. */
8561 bfd_elf_bfd_from_remote_memory
8565 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
8567 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
8568 (templ, ehdr_vma, loadbasep, target_read_memory);
8572 _bfd_elf_get_synthetic_symtab (bfd *abfd,
8573 long symcount ATTRIBUTE_UNUSED,
8574 asymbol **syms ATTRIBUTE_UNUSED,
8579 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8582 const char *relplt_name;
8583 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8587 Elf_Internal_Shdr *hdr;
8593 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
8596 if (dynsymcount <= 0)
8599 if (!bed->plt_sym_val)
8602 relplt_name = bed->relplt_name;
8603 if (relplt_name == NULL)
8604 relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
8605 relplt = bfd_get_section_by_name (abfd, relplt_name);
8609 hdr = &elf_section_data (relplt)->this_hdr;
8610 if (hdr->sh_link != elf_dynsymtab (abfd)
8611 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
8614 plt = bfd_get_section_by_name (abfd, ".plt");
8618 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8619 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
8622 count = relplt->size / hdr->sh_entsize;
8623 size = count * sizeof (asymbol);
8624 p = relplt->relocation;
8625 for (i = 0; i < count; i++, p++)
8626 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
8628 s = *ret = bfd_malloc (size);
8632 names = (char *) (s + count);
8633 p = relplt->relocation;
8635 for (i = 0; i < count; i++, s++, p++)
8640 addr = bed->plt_sym_val (i, plt, p);
8641 if (addr == (bfd_vma) -1)
8644 *s = **p->sym_ptr_ptr;
8645 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8646 we are defining a symbol, ensure one of them is set. */
8647 if ((s->flags & BSF_LOCAL) == 0)
8648 s->flags |= BSF_GLOBAL;
8650 s->value = addr - plt->vma;
8652 len = strlen ((*p->sym_ptr_ptr)->name);
8653 memcpy (names, (*p->sym_ptr_ptr)->name, len);
8655 memcpy (names, "@plt", sizeof ("@plt"));
8656 names += sizeof ("@plt");
8663 /* It is only used by x86-64 so far. */
8664 asection _bfd_elf_large_com_section
8665 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
8666 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
8669 _bfd_elf_set_osabi (bfd * abfd,
8670 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
8672 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
8674 i_ehdrp = elf_elfheader (abfd);
8676 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
8680 /* Return TRUE for ELF symbol types that represent functions.
8681 This is the default version of this function, which is sufficient for
8682 most targets. It returns true if TYPE is STT_FUNC. */
8685 _bfd_elf_is_function_type (unsigned int type)
8687 return (type == STT_FUNC);