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);
1789 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1792 elf_elfsections (abfd)[shindex] = hdr2;
1793 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1794 target_sect->flags |= SEC_RELOC;
1795 target_sect->relocation = NULL;
1796 target_sect->rel_filepos = hdr->sh_offset;
1797 /* In the section to which the relocations apply, mark whether
1798 its relocations are of the REL or RELA variety. */
1799 if (hdr->sh_size != 0)
1800 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
1801 abfd->flags |= HAS_RELOC;
1805 case SHT_GNU_verdef:
1806 elf_dynverdef (abfd) = shindex;
1807 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1808 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1810 case SHT_GNU_versym:
1811 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
1813 elf_dynversym (abfd) = shindex;
1814 elf_tdata (abfd)->dynversym_hdr = *hdr;
1815 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1817 case SHT_GNU_verneed:
1818 elf_dynverref (abfd) = shindex;
1819 elf_tdata (abfd)->dynverref_hdr = *hdr;
1820 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1826 /* We need a BFD section for objcopy and relocatable linking,
1827 and it's handy to have the signature available as the section
1829 if (! IS_VALID_GROUP_SECTION_HEADER (hdr))
1831 name = group_signature (abfd, hdr);
1834 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1836 if (hdr->contents != NULL)
1838 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1839 unsigned int n_elt = hdr->sh_size / GRP_ENTRY_SIZE;
1842 if (idx->flags & GRP_COMDAT)
1843 hdr->bfd_section->flags
1844 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1846 /* We try to keep the same section order as it comes in. */
1848 while (--n_elt != 0)
1852 if (idx->shdr != NULL
1853 && (s = idx->shdr->bfd_section) != NULL
1854 && elf_next_in_group (s) != NULL)
1856 elf_next_in_group (hdr->bfd_section) = s;
1864 /* Possibly an attributes section. */
1865 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
1866 || hdr->sh_type == bed->obj_attrs_section_type)
1868 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1870 _bfd_elf_parse_attributes (abfd, hdr);
1874 /* Check for any processor-specific section types. */
1875 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
1878 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
1880 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1881 /* FIXME: How to properly handle allocated section reserved
1882 for applications? */
1883 (*_bfd_error_handler)
1884 (_("%B: don't know how to handle allocated, application "
1885 "specific section `%s' [0x%8x]"),
1886 abfd, name, hdr->sh_type);
1888 /* Allow sections reserved for applications. */
1889 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1892 else if (hdr->sh_type >= SHT_LOPROC
1893 && hdr->sh_type <= SHT_HIPROC)
1894 /* FIXME: We should handle this section. */
1895 (*_bfd_error_handler)
1896 (_("%B: don't know how to handle processor specific section "
1898 abfd, name, hdr->sh_type);
1899 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
1901 /* Unrecognised OS-specific sections. */
1902 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
1903 /* SHF_OS_NONCONFORMING indicates that special knowledge is
1904 required to correctly process the section and the file should
1905 be rejected with an error message. */
1906 (*_bfd_error_handler)
1907 (_("%B: don't know how to handle OS specific section "
1909 abfd, name, hdr->sh_type);
1911 /* Otherwise it should be processed. */
1912 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1915 /* FIXME: We should handle this section. */
1916 (*_bfd_error_handler)
1917 (_("%B: don't know how to handle section `%s' [0x%8x]"),
1918 abfd, name, hdr->sh_type);
1926 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
1927 Return SEC for sections that have no elf section, and NULL on error. */
1930 bfd_section_from_r_symndx (bfd *abfd,
1931 struct sym_sec_cache *cache,
1933 unsigned long r_symndx)
1935 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
1938 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
1940 Elf_Internal_Shdr *symtab_hdr;
1941 unsigned char esym[sizeof (Elf64_External_Sym)];
1942 Elf_External_Sym_Shndx eshndx;
1943 Elf_Internal_Sym isym;
1945 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1946 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
1947 &isym, esym, &eshndx) == NULL)
1950 if (cache->abfd != abfd)
1952 memset (cache->indx, -1, sizeof (cache->indx));
1955 cache->indx[ent] = r_symndx;
1956 cache->shndx[ent] = isym.st_shndx;
1959 s = bfd_section_from_elf_index (abfd, cache->shndx[ent]);
1966 /* Given an ELF section number, retrieve the corresponding BFD
1970 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
1972 if (index >= elf_numsections (abfd))
1974 return elf_elfsections (abfd)[index]->bfd_section;
1977 static const struct bfd_elf_special_section special_sections_b[] =
1979 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1980 { NULL, 0, 0, 0, 0 }
1983 static const struct bfd_elf_special_section special_sections_c[] =
1985 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
1986 { NULL, 0, 0, 0, 0 }
1989 static const struct bfd_elf_special_section special_sections_d[] =
1991 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1992 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1993 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
1994 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
1995 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
1996 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
1997 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
1998 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
1999 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
2000 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
2001 { NULL, 0, 0, 0, 0 }
2004 static const struct bfd_elf_special_section special_sections_f[] =
2006 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2007 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2008 { NULL, 0, 0, 0, 0 }
2011 static const struct bfd_elf_special_section special_sections_g[] =
2013 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2014 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2015 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2016 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2017 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2018 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2019 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2020 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2021 { NULL, 0, 0, 0, 0 }
2024 static const struct bfd_elf_special_section special_sections_h[] =
2026 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2027 { NULL, 0, 0, 0, 0 }
2030 static const struct bfd_elf_special_section special_sections_i[] =
2032 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2033 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2034 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2035 { NULL, 0, 0, 0, 0 }
2038 static const struct bfd_elf_special_section special_sections_l[] =
2040 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2041 { NULL, 0, 0, 0, 0 }
2044 static const struct bfd_elf_special_section special_sections_n[] =
2046 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2047 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2048 { NULL, 0, 0, 0, 0 }
2051 static const struct bfd_elf_special_section special_sections_p[] =
2053 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2054 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2055 { NULL, 0, 0, 0, 0 }
2058 static const struct bfd_elf_special_section special_sections_r[] =
2060 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2061 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2062 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2063 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2064 { NULL, 0, 0, 0, 0 }
2067 static const struct bfd_elf_special_section special_sections_s[] =
2069 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2070 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2071 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2072 /* See struct bfd_elf_special_section declaration for the semantics of
2073 this special case where .prefix_length != strlen (.prefix). */
2074 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2075 { NULL, 0, 0, 0, 0 }
2078 static const struct bfd_elf_special_section special_sections_t[] =
2080 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2081 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2082 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2083 { NULL, 0, 0, 0, 0 }
2086 static const struct bfd_elf_special_section *special_sections[] =
2088 special_sections_b, /* 'b' */
2089 special_sections_c, /* 'c' */
2090 special_sections_d, /* 'd' */
2092 special_sections_f, /* 'f' */
2093 special_sections_g, /* 'g' */
2094 special_sections_h, /* 'h' */
2095 special_sections_i, /* 'i' */
2098 special_sections_l, /* 'l' */
2100 special_sections_n, /* 'n' */
2102 special_sections_p, /* 'p' */
2104 special_sections_r, /* 'r' */
2105 special_sections_s, /* 's' */
2106 special_sections_t, /* 't' */
2109 const struct bfd_elf_special_section *
2110 _bfd_elf_get_special_section (const char *name,
2111 const struct bfd_elf_special_section *spec,
2117 len = strlen (name);
2119 for (i = 0; spec[i].prefix != NULL; i++)
2122 int prefix_len = spec[i].prefix_length;
2124 if (len < prefix_len)
2126 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2129 suffix_len = spec[i].suffix_length;
2130 if (suffix_len <= 0)
2132 if (name[prefix_len] != 0)
2134 if (suffix_len == 0)
2136 if (name[prefix_len] != '.'
2137 && (suffix_len == -2
2138 || (rela && spec[i].type == SHT_REL)))
2144 if (len < prefix_len + suffix_len)
2146 if (memcmp (name + len - suffix_len,
2147 spec[i].prefix + prefix_len,
2157 const struct bfd_elf_special_section *
2158 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2161 const struct bfd_elf_special_section *spec;
2162 const struct elf_backend_data *bed;
2164 /* See if this is one of the special sections. */
2165 if (sec->name == NULL)
2168 bed = get_elf_backend_data (abfd);
2169 spec = bed->special_sections;
2172 spec = _bfd_elf_get_special_section (sec->name,
2173 bed->special_sections,
2179 if (sec->name[0] != '.')
2182 i = sec->name[1] - 'b';
2183 if (i < 0 || i > 't' - 'b')
2186 spec = special_sections[i];
2191 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2195 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2197 struct bfd_elf_section_data *sdata;
2198 const struct elf_backend_data *bed;
2199 const struct bfd_elf_special_section *ssect;
2201 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2204 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2207 sec->used_by_bfd = sdata;
2210 /* Indicate whether or not this section should use RELA relocations. */
2211 bed = get_elf_backend_data (abfd);
2212 sec->use_rela_p = bed->default_use_rela_p;
2214 /* When we read a file, we don't need to set ELF section type and
2215 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2216 anyway. We will set ELF section type and flags for all linker
2217 created sections. If user specifies BFD section flags, we will
2218 set ELF section type and flags based on BFD section flags in
2219 elf_fake_sections. */
2220 if ((!sec->flags && abfd->direction != read_direction)
2221 || (sec->flags & SEC_LINKER_CREATED) != 0)
2223 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2226 elf_section_type (sec) = ssect->type;
2227 elf_section_flags (sec) = ssect->attr;
2231 return _bfd_generic_new_section_hook (abfd, sec);
2234 /* Create a new bfd section from an ELF program header.
2236 Since program segments have no names, we generate a synthetic name
2237 of the form segment<NUM>, where NUM is generally the index in the
2238 program header table. For segments that are split (see below) we
2239 generate the names segment<NUM>a and segment<NUM>b.
2241 Note that some program segments may have a file size that is different than
2242 (less than) the memory size. All this means is that at execution the
2243 system must allocate the amount of memory specified by the memory size,
2244 but only initialize it with the first "file size" bytes read from the
2245 file. This would occur for example, with program segments consisting
2246 of combined data+bss.
2248 To handle the above situation, this routine generates TWO bfd sections
2249 for the single program segment. The first has the length specified by
2250 the file size of the segment, and the second has the length specified
2251 by the difference between the two sizes. In effect, the segment is split
2252 into its initialized and uninitialized parts.
2257 _bfd_elf_make_section_from_phdr (bfd *abfd,
2258 Elf_Internal_Phdr *hdr,
2260 const char *typename)
2268 split = ((hdr->p_memsz > 0)
2269 && (hdr->p_filesz > 0)
2270 && (hdr->p_memsz > hdr->p_filesz));
2272 if (hdr->p_filesz > 0)
2274 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2275 len = strlen (namebuf) + 1;
2276 name = bfd_alloc (abfd, len);
2279 memcpy (name, namebuf, len);
2280 newsect = bfd_make_section (abfd, name);
2281 if (newsect == NULL)
2283 newsect->vma = hdr->p_vaddr;
2284 newsect->lma = hdr->p_paddr;
2285 newsect->size = hdr->p_filesz;
2286 newsect->filepos = hdr->p_offset;
2287 newsect->flags |= SEC_HAS_CONTENTS;
2288 newsect->alignment_power = bfd_log2 (hdr->p_align);
2289 if (hdr->p_type == PT_LOAD)
2291 newsect->flags |= SEC_ALLOC;
2292 newsect->flags |= SEC_LOAD;
2293 if (hdr->p_flags & PF_X)
2295 /* FIXME: all we known is that it has execute PERMISSION,
2297 newsect->flags |= SEC_CODE;
2300 if (!(hdr->p_flags & PF_W))
2302 newsect->flags |= SEC_READONLY;
2306 if (hdr->p_memsz > hdr->p_filesz)
2310 sprintf (namebuf, "%s%d%s", typename, index, split ? "b" : "");
2311 len = strlen (namebuf) + 1;
2312 name = bfd_alloc (abfd, len);
2315 memcpy (name, namebuf, len);
2316 newsect = bfd_make_section (abfd, name);
2317 if (newsect == NULL)
2319 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2320 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2321 newsect->size = hdr->p_memsz - hdr->p_filesz;
2322 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2323 align = newsect->vma & -newsect->vma;
2324 if (align == 0 || align > hdr->p_align)
2325 align = hdr->p_align;
2326 newsect->alignment_power = bfd_log2 (align);
2327 if (hdr->p_type == PT_LOAD)
2329 /* Hack for gdb. Segments that have not been modified do
2330 not have their contents written to a core file, on the
2331 assumption that a debugger can find the contents in the
2332 executable. We flag this case by setting the fake
2333 section size to zero. Note that "real" bss sections will
2334 always have their contents dumped to the core file. */
2335 if (bfd_get_format (abfd) == bfd_core)
2337 newsect->flags |= SEC_ALLOC;
2338 if (hdr->p_flags & PF_X)
2339 newsect->flags |= SEC_CODE;
2341 if (!(hdr->p_flags & PF_W))
2342 newsect->flags |= SEC_READONLY;
2349 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2351 const struct elf_backend_data *bed;
2353 switch (hdr->p_type)
2356 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2359 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2362 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2365 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2368 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2370 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2375 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2378 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2380 case PT_GNU_EH_FRAME:
2381 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2385 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2388 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
2391 /* Check for any processor-specific program segment types. */
2392 bed = get_elf_backend_data (abfd);
2393 return bed->elf_backend_section_from_phdr (abfd, hdr, index, "proc");
2397 /* Initialize REL_HDR, the section-header for new section, containing
2398 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2399 relocations; otherwise, we use REL relocations. */
2402 _bfd_elf_init_reloc_shdr (bfd *abfd,
2403 Elf_Internal_Shdr *rel_hdr,
2405 bfd_boolean use_rela_p)
2408 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2409 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2411 name = bfd_alloc (abfd, amt);
2414 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2416 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2418 if (rel_hdr->sh_name == (unsigned int) -1)
2420 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2421 rel_hdr->sh_entsize = (use_rela_p
2422 ? bed->s->sizeof_rela
2423 : bed->s->sizeof_rel);
2424 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2425 rel_hdr->sh_flags = 0;
2426 rel_hdr->sh_addr = 0;
2427 rel_hdr->sh_size = 0;
2428 rel_hdr->sh_offset = 0;
2433 /* Set up an ELF internal section header for a section. */
2436 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2438 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2439 bfd_boolean *failedptr = failedptrarg;
2440 Elf_Internal_Shdr *this_hdr;
2441 unsigned int sh_type;
2445 /* We already failed; just get out of the bfd_map_over_sections
2450 this_hdr = &elf_section_data (asect)->this_hdr;
2452 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2453 asect->name, FALSE);
2454 if (this_hdr->sh_name == (unsigned int) -1)
2460 /* Don't clear sh_flags. Assembler may set additional bits. */
2462 if ((asect->flags & SEC_ALLOC) != 0
2463 || asect->user_set_vma)
2464 this_hdr->sh_addr = asect->vma;
2466 this_hdr->sh_addr = 0;
2468 this_hdr->sh_offset = 0;
2469 this_hdr->sh_size = asect->size;
2470 this_hdr->sh_link = 0;
2471 this_hdr->sh_addralign = 1 << asect->alignment_power;
2472 /* The sh_entsize and sh_info fields may have been set already by
2473 copy_private_section_data. */
2475 this_hdr->bfd_section = asect;
2476 this_hdr->contents = NULL;
2478 /* If the section type is unspecified, we set it based on
2480 if ((asect->flags & SEC_GROUP) != 0)
2481 sh_type = SHT_GROUP;
2482 else if ((asect->flags & SEC_ALLOC) != 0
2483 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2484 || (asect->flags & SEC_NEVER_LOAD) != 0))
2485 sh_type = SHT_NOBITS;
2487 sh_type = SHT_PROGBITS;
2489 if (this_hdr->sh_type == SHT_NULL)
2490 this_hdr->sh_type = sh_type;
2491 else if (this_hdr->sh_type == SHT_NOBITS
2492 && sh_type == SHT_PROGBITS
2493 && (asect->flags & SEC_ALLOC) != 0)
2495 /* Warn if we are changing a NOBITS section to PROGBITS, but
2496 allow the link to proceed. This can happen when users link
2497 non-bss input sections to bss output sections, or emit data
2498 to a bss output section via a linker script. */
2499 (*_bfd_error_handler)
2500 (_("section `%A' type changed to PROGBITS"), asect);
2501 this_hdr->sh_type = sh_type;
2504 switch (this_hdr->sh_type)
2510 case SHT_INIT_ARRAY:
2511 case SHT_FINI_ARRAY:
2512 case SHT_PREINIT_ARRAY:
2519 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2523 this_hdr->sh_entsize = bed->s->sizeof_sym;
2527 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2531 if (get_elf_backend_data (abfd)->may_use_rela_p)
2532 this_hdr->sh_entsize = bed->s->sizeof_rela;
2536 if (get_elf_backend_data (abfd)->may_use_rel_p)
2537 this_hdr->sh_entsize = bed->s->sizeof_rel;
2540 case SHT_GNU_versym:
2541 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2544 case SHT_GNU_verdef:
2545 this_hdr->sh_entsize = 0;
2546 /* objcopy or strip will copy over sh_info, but may not set
2547 cverdefs. The linker will set cverdefs, but sh_info will be
2549 if (this_hdr->sh_info == 0)
2550 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2552 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2553 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2556 case SHT_GNU_verneed:
2557 this_hdr->sh_entsize = 0;
2558 /* objcopy or strip will copy over sh_info, but may not set
2559 cverrefs. The linker will set cverrefs, but sh_info will be
2561 if (this_hdr->sh_info == 0)
2562 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2564 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2565 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2569 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
2573 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
2577 if ((asect->flags & SEC_ALLOC) != 0)
2578 this_hdr->sh_flags |= SHF_ALLOC;
2579 if ((asect->flags & SEC_READONLY) == 0)
2580 this_hdr->sh_flags |= SHF_WRITE;
2581 if ((asect->flags & SEC_CODE) != 0)
2582 this_hdr->sh_flags |= SHF_EXECINSTR;
2583 if ((asect->flags & SEC_MERGE) != 0)
2585 this_hdr->sh_flags |= SHF_MERGE;
2586 this_hdr->sh_entsize = asect->entsize;
2587 if ((asect->flags & SEC_STRINGS) != 0)
2588 this_hdr->sh_flags |= SHF_STRINGS;
2590 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2591 this_hdr->sh_flags |= SHF_GROUP;
2592 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2594 this_hdr->sh_flags |= SHF_TLS;
2595 if (asect->size == 0
2596 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2598 struct bfd_link_order *o = asect->map_tail.link_order;
2600 this_hdr->sh_size = 0;
2603 this_hdr->sh_size = o->offset + o->size;
2604 if (this_hdr->sh_size != 0)
2605 this_hdr->sh_type = SHT_NOBITS;
2610 /* Check for processor-specific section types. */
2611 sh_type = this_hdr->sh_type;
2612 if (bed->elf_backend_fake_sections
2613 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2616 if (sh_type == SHT_NOBITS && asect->size != 0)
2618 /* Don't change the header type from NOBITS if we are being
2619 called for objcopy --only-keep-debug. */
2620 this_hdr->sh_type = sh_type;
2623 /* If the section has relocs, set up a section header for the
2624 SHT_REL[A] section. If two relocation sections are required for
2625 this section, it is up to the processor-specific back-end to
2626 create the other. */
2627 if ((asect->flags & SEC_RELOC) != 0
2628 && !_bfd_elf_init_reloc_shdr (abfd,
2629 &elf_section_data (asect)->rel_hdr,
2635 /* Fill in the contents of a SHT_GROUP section. */
2638 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2640 bfd_boolean *failedptr = failedptrarg;
2641 unsigned long symindx;
2642 asection *elt, *first;
2646 /* Ignore linker created group section. See elfNN_ia64_object_p in
2648 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2653 if (elf_group_id (sec) != NULL)
2654 symindx = elf_group_id (sec)->udata.i;
2658 /* If called from the assembler, swap_out_syms will have set up
2659 elf_section_syms; If called for "ld -r", use target_index. */
2660 if (elf_section_syms (abfd) != NULL)
2661 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2663 symindx = sec->target_index;
2665 elf_section_data (sec)->this_hdr.sh_info = symindx;
2667 /* The contents won't be allocated for "ld -r" or objcopy. */
2669 if (sec->contents == NULL)
2672 sec->contents = bfd_alloc (abfd, sec->size);
2674 /* Arrange for the section to be written out. */
2675 elf_section_data (sec)->this_hdr.contents = sec->contents;
2676 if (sec->contents == NULL)
2683 loc = sec->contents + sec->size;
2685 /* Get the pointer to the first section in the group that gas
2686 squirreled away here. objcopy arranges for this to be set to the
2687 start of the input section group. */
2688 first = elt = elf_next_in_group (sec);
2690 /* First element is a flag word. Rest of section is elf section
2691 indices for all the sections of the group. Write them backwards
2692 just to keep the group in the same order as given in .section
2693 directives, not that it matters. */
2702 s = s->output_section;
2705 idx = elf_section_data (s)->this_idx;
2706 H_PUT_32 (abfd, idx, loc);
2707 elt = elf_next_in_group (elt);
2712 if ((loc -= 4) != sec->contents)
2715 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2718 /* Assign all ELF section numbers. The dummy first section is handled here
2719 too. The link/info pointers for the standard section types are filled
2720 in here too, while we're at it. */
2723 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2725 struct elf_obj_tdata *t = elf_tdata (abfd);
2727 unsigned int section_number, secn;
2728 Elf_Internal_Shdr **i_shdrp;
2729 struct bfd_elf_section_data *d;
2733 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2735 /* SHT_GROUP sections are in relocatable files only. */
2736 if (link_info == NULL || link_info->relocatable)
2738 /* Put SHT_GROUP sections first. */
2739 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2741 d = elf_section_data (sec);
2743 if (d->this_hdr.sh_type == SHT_GROUP)
2745 if (sec->flags & SEC_LINKER_CREATED)
2747 /* Remove the linker created SHT_GROUP sections. */
2748 bfd_section_list_remove (abfd, sec);
2749 abfd->section_count--;
2753 if (section_number == SHN_LORESERVE)
2754 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2755 d->this_idx = section_number++;
2761 for (sec = abfd->sections; sec; sec = sec->next)
2763 d = elf_section_data (sec);
2765 if (d->this_hdr.sh_type != SHT_GROUP)
2767 if (section_number == SHN_LORESERVE)
2768 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2769 d->this_idx = section_number++;
2771 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2772 if ((sec->flags & SEC_RELOC) == 0)
2776 if (section_number == SHN_LORESERVE)
2777 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2778 d->rel_idx = section_number++;
2779 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2784 if (section_number == SHN_LORESERVE)
2785 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2786 d->rel_idx2 = section_number++;
2787 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2793 if (section_number == SHN_LORESERVE)
2794 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2795 t->shstrtab_section = section_number++;
2796 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2797 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2799 if (bfd_get_symcount (abfd) > 0)
2801 if (section_number == SHN_LORESERVE)
2802 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2803 t->symtab_section = section_number++;
2804 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2805 if (section_number > SHN_LORESERVE - 2)
2807 if (section_number == SHN_LORESERVE)
2808 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2809 t->symtab_shndx_section = section_number++;
2810 t->symtab_shndx_hdr.sh_name
2811 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2812 ".symtab_shndx", FALSE);
2813 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2816 if (section_number == SHN_LORESERVE)
2817 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2818 t->strtab_section = section_number++;
2819 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2822 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2823 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2825 elf_numsections (abfd) = section_number;
2826 elf_elfheader (abfd)->e_shnum = section_number;
2827 if (section_number > SHN_LORESERVE)
2828 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2830 /* Set up the list of section header pointers, in agreement with the
2832 i_shdrp = bfd_zalloc2 (abfd, section_number, sizeof (Elf_Internal_Shdr *));
2833 if (i_shdrp == NULL)
2836 i_shdrp[0] = bfd_zalloc (abfd, sizeof (Elf_Internal_Shdr));
2837 if (i_shdrp[0] == NULL)
2839 bfd_release (abfd, i_shdrp);
2843 elf_elfsections (abfd) = i_shdrp;
2845 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2846 if (bfd_get_symcount (abfd) > 0)
2848 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2849 if (elf_numsections (abfd) > SHN_LORESERVE)
2851 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2852 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2854 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2855 t->symtab_hdr.sh_link = t->strtab_section;
2858 for (sec = abfd->sections; sec; sec = sec->next)
2860 struct bfd_elf_section_data *d = elf_section_data (sec);
2864 i_shdrp[d->this_idx] = &d->this_hdr;
2865 if (d->rel_idx != 0)
2866 i_shdrp[d->rel_idx] = &d->rel_hdr;
2867 if (d->rel_idx2 != 0)
2868 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2870 /* Fill in the sh_link and sh_info fields while we're at it. */
2872 /* sh_link of a reloc section is the section index of the symbol
2873 table. sh_info is the section index of the section to which
2874 the relocation entries apply. */
2875 if (d->rel_idx != 0)
2877 d->rel_hdr.sh_link = t->symtab_section;
2878 d->rel_hdr.sh_info = d->this_idx;
2880 if (d->rel_idx2 != 0)
2882 d->rel_hdr2->sh_link = t->symtab_section;
2883 d->rel_hdr2->sh_info = d->this_idx;
2886 /* We need to set up sh_link for SHF_LINK_ORDER. */
2887 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
2889 s = elf_linked_to_section (sec);
2892 /* elf_linked_to_section points to the input section. */
2893 if (link_info != NULL)
2895 /* Check discarded linkonce section. */
2896 if (elf_discarded_section (s))
2899 (*_bfd_error_handler)
2900 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
2901 abfd, d->this_hdr.bfd_section,
2903 /* Point to the kept section if it has the same
2904 size as the discarded one. */
2905 kept = _bfd_elf_check_kept_section (s, link_info);
2908 bfd_set_error (bfd_error_bad_value);
2914 s = s->output_section;
2915 BFD_ASSERT (s != NULL);
2919 /* Handle objcopy. */
2920 if (s->output_section == NULL)
2922 (*_bfd_error_handler)
2923 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
2924 abfd, d->this_hdr.bfd_section, s, s->owner);
2925 bfd_set_error (bfd_error_bad_value);
2928 s = s->output_section;
2930 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2935 The Intel C compiler generates SHT_IA_64_UNWIND with
2936 SHF_LINK_ORDER. But it doesn't set the sh_link or
2937 sh_info fields. Hence we could get the situation
2939 const struct elf_backend_data *bed
2940 = get_elf_backend_data (abfd);
2941 if (bed->link_order_error_handler)
2942 bed->link_order_error_handler
2943 (_("%B: warning: sh_link not set for section `%A'"),
2948 switch (d->this_hdr.sh_type)
2952 /* A reloc section which we are treating as a normal BFD
2953 section. sh_link is the section index of the symbol
2954 table. sh_info is the section index of the section to
2955 which the relocation entries apply. We assume that an
2956 allocated reloc section uses the dynamic symbol table.
2957 FIXME: How can we be sure? */
2958 s = bfd_get_section_by_name (abfd, ".dynsym");
2960 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2962 /* We look up the section the relocs apply to by name. */
2964 if (d->this_hdr.sh_type == SHT_REL)
2968 s = bfd_get_section_by_name (abfd, name);
2970 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2974 /* We assume that a section named .stab*str is a stabs
2975 string section. We look for a section with the same name
2976 but without the trailing ``str'', and set its sh_link
2977 field to point to this section. */
2978 if (CONST_STRNEQ (sec->name, ".stab")
2979 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2984 len = strlen (sec->name);
2985 alc = bfd_malloc (len - 2);
2988 memcpy (alc, sec->name, len - 3);
2989 alc[len - 3] = '\0';
2990 s = bfd_get_section_by_name (abfd, alc);
2994 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
2996 /* This is a .stab section. */
2997 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
2998 elf_section_data (s)->this_hdr.sh_entsize
2999 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3006 case SHT_GNU_verneed:
3007 case SHT_GNU_verdef:
3008 /* sh_link is the section header index of the string table
3009 used for the dynamic entries, or the symbol table, or the
3011 s = bfd_get_section_by_name (abfd, ".dynstr");
3013 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3016 case SHT_GNU_LIBLIST:
3017 /* sh_link is the section header index of the prelink library
3018 list used for the dynamic entries, or the symbol table, or
3019 the version strings. */
3020 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3021 ? ".dynstr" : ".gnu.libstr");
3023 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3028 case SHT_GNU_versym:
3029 /* sh_link is the section header index of the symbol table
3030 this hash table or version table is for. */
3031 s = bfd_get_section_by_name (abfd, ".dynsym");
3033 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3037 d->this_hdr.sh_link = t->symtab_section;
3041 for (secn = 1; secn < section_number; ++secn)
3042 if (i_shdrp[secn] == NULL)
3043 i_shdrp[secn] = i_shdrp[0];
3045 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3046 i_shdrp[secn]->sh_name);
3050 /* Map symbol from it's internal number to the external number, moving
3051 all local symbols to be at the head of the list. */
3054 sym_is_global (bfd *abfd, asymbol *sym)
3056 /* If the backend has a special mapping, use it. */
3057 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3058 if (bed->elf_backend_sym_is_global)
3059 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3061 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3062 || bfd_is_und_section (bfd_get_section (sym))
3063 || bfd_is_com_section (bfd_get_section (sym)));
3066 /* Don't output section symbols for sections that are not going to be
3067 output. Also, don't output section symbols for reloc and other
3068 special sections. */
3071 ignore_section_sym (bfd *abfd, asymbol *sym)
3073 return ((sym->flags & BSF_SECTION_SYM) != 0
3075 || (sym->section->owner != abfd
3076 && (sym->section->output_section->owner != abfd
3077 || sym->section->output_offset != 0))));
3081 elf_map_symbols (bfd *abfd)
3083 unsigned int symcount = bfd_get_symcount (abfd);
3084 asymbol **syms = bfd_get_outsymbols (abfd);
3085 asymbol **sect_syms;
3086 unsigned int num_locals = 0;
3087 unsigned int num_globals = 0;
3088 unsigned int num_locals2 = 0;
3089 unsigned int num_globals2 = 0;
3096 fprintf (stderr, "elf_map_symbols\n");
3100 for (asect = abfd->sections; asect; asect = asect->next)
3102 if (max_index < asect->index)
3103 max_index = asect->index;
3107 sect_syms = bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3108 if (sect_syms == NULL)
3110 elf_section_syms (abfd) = sect_syms;
3111 elf_num_section_syms (abfd) = max_index;
3113 /* Init sect_syms entries for any section symbols we have already
3114 decided to output. */
3115 for (idx = 0; idx < symcount; idx++)
3117 asymbol *sym = syms[idx];
3119 if ((sym->flags & BSF_SECTION_SYM) != 0
3120 && !ignore_section_sym (abfd, sym))
3122 asection *sec = sym->section;
3124 if (sec->owner != abfd)
3125 sec = sec->output_section;
3127 sect_syms[sec->index] = syms[idx];
3131 /* Classify all of the symbols. */
3132 for (idx = 0; idx < symcount; idx++)
3134 if (ignore_section_sym (abfd, syms[idx]))
3136 if (!sym_is_global (abfd, syms[idx]))
3142 /* We will be adding a section symbol for each normal BFD section. Most
3143 sections will already have a section symbol in outsymbols, but
3144 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3145 at least in that case. */
3146 for (asect = abfd->sections; asect; asect = asect->next)
3148 if (sect_syms[asect->index] == NULL)
3150 if (!sym_is_global (abfd, asect->symbol))
3157 /* Now sort the symbols so the local symbols are first. */
3158 new_syms = bfd_alloc2 (abfd, num_locals + num_globals, sizeof (asymbol *));
3160 if (new_syms == NULL)
3163 for (idx = 0; idx < symcount; idx++)
3165 asymbol *sym = syms[idx];
3168 if (ignore_section_sym (abfd, sym))
3170 if (!sym_is_global (abfd, sym))
3173 i = num_locals + num_globals2++;
3175 sym->udata.i = i + 1;
3177 for (asect = abfd->sections; asect; asect = asect->next)
3179 if (sect_syms[asect->index] == NULL)
3181 asymbol *sym = asect->symbol;
3184 sect_syms[asect->index] = sym;
3185 if (!sym_is_global (abfd, sym))
3188 i = num_locals + num_globals2++;
3190 sym->udata.i = i + 1;
3194 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3196 elf_num_locals (abfd) = num_locals;
3197 elf_num_globals (abfd) = num_globals;
3201 /* Align to the maximum file alignment that could be required for any
3202 ELF data structure. */
3204 static inline file_ptr
3205 align_file_position (file_ptr off, int align)
3207 return (off + align - 1) & ~(align - 1);
3210 /* Assign a file position to a section, optionally aligning to the
3211 required section alignment. */
3214 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3222 al = i_shdrp->sh_addralign;
3224 offset = BFD_ALIGN (offset, al);
3226 i_shdrp->sh_offset = offset;
3227 if (i_shdrp->bfd_section != NULL)
3228 i_shdrp->bfd_section->filepos = offset;
3229 if (i_shdrp->sh_type != SHT_NOBITS)
3230 offset += i_shdrp->sh_size;
3234 /* Compute the file positions we are going to put the sections at, and
3235 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3236 is not NULL, this is being called by the ELF backend linker. */
3239 _bfd_elf_compute_section_file_positions (bfd *abfd,
3240 struct bfd_link_info *link_info)
3242 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3244 struct bfd_strtab_hash *strtab = NULL;
3245 Elf_Internal_Shdr *shstrtab_hdr;
3247 if (abfd->output_has_begun)
3250 /* Do any elf backend specific processing first. */
3251 if (bed->elf_backend_begin_write_processing)
3252 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3254 if (! prep_headers (abfd))
3257 /* Post process the headers if necessary. */
3258 if (bed->elf_backend_post_process_headers)
3259 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3262 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3266 if (!assign_section_numbers (abfd, link_info))
3269 /* The backend linker builds symbol table information itself. */
3270 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3272 /* Non-zero if doing a relocatable link. */
3273 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3275 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3279 if (link_info == NULL)
3281 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3286 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3287 /* sh_name was set in prep_headers. */
3288 shstrtab_hdr->sh_type = SHT_STRTAB;
3289 shstrtab_hdr->sh_flags = 0;
3290 shstrtab_hdr->sh_addr = 0;
3291 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3292 shstrtab_hdr->sh_entsize = 0;
3293 shstrtab_hdr->sh_link = 0;
3294 shstrtab_hdr->sh_info = 0;
3295 /* sh_offset is set in assign_file_positions_except_relocs. */
3296 shstrtab_hdr->sh_addralign = 1;
3298 if (!assign_file_positions_except_relocs (abfd, link_info))
3301 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3304 Elf_Internal_Shdr *hdr;
3306 off = elf_tdata (abfd)->next_file_pos;
3308 hdr = &elf_tdata (abfd)->symtab_hdr;
3309 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3311 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3312 if (hdr->sh_size != 0)
3313 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3315 hdr = &elf_tdata (abfd)->strtab_hdr;
3316 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3318 elf_tdata (abfd)->next_file_pos = off;
3320 /* Now that we know where the .strtab section goes, write it
3322 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3323 || ! _bfd_stringtab_emit (abfd, strtab))
3325 _bfd_stringtab_free (strtab);
3328 abfd->output_has_begun = TRUE;
3333 /* Make an initial estimate of the size of the program header. If we
3334 get the number wrong here, we'll redo section placement. */
3336 static bfd_size_type
3337 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3341 const struct elf_backend_data *bed;
3343 /* Assume we will need exactly two PT_LOAD segments: one for text
3344 and one for data. */
3347 s = bfd_get_section_by_name (abfd, ".interp");
3348 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3350 /* If we have a loadable interpreter section, we need a
3351 PT_INTERP segment. In this case, assume we also need a
3352 PT_PHDR segment, although that may not be true for all
3357 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3359 /* We need a PT_DYNAMIC segment. */
3365 /* We need a PT_GNU_RELRO segment. */
3369 if (elf_tdata (abfd)->eh_frame_hdr)
3371 /* We need a PT_GNU_EH_FRAME segment. */
3375 if (elf_tdata (abfd)->stack_flags)
3377 /* We need a PT_GNU_STACK segment. */
3381 for (s = abfd->sections; s != NULL; s = s->next)
3383 if ((s->flags & SEC_LOAD) != 0
3384 && CONST_STRNEQ (s->name, ".note"))
3386 /* We need a PT_NOTE segment. */
3388 /* Try to create just one PT_NOTE segment
3389 for all adjacent loadable .note* sections.
3390 gABI requires that within a PT_NOTE segment
3391 (and also inside of each SHT_NOTE section)
3392 each note is padded to a multiple of 4 size,
3393 so we check whether the sections are correctly
3395 if (s->alignment_power == 2)
3396 while (s->next != NULL
3397 && s->next->alignment_power == 2
3398 && (s->next->flags & SEC_LOAD) != 0
3399 && CONST_STRNEQ (s->next->name, ".note"))
3404 for (s = abfd->sections; s != NULL; s = s->next)
3406 if (s->flags & SEC_THREAD_LOCAL)
3408 /* We need a PT_TLS segment. */
3414 /* Let the backend count up any program headers it might need. */
3415 bed = get_elf_backend_data (abfd);
3416 if (bed->elf_backend_additional_program_headers)
3420 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3426 return segs * bed->s->sizeof_phdr;
3429 /* Create a mapping from a set of sections to a program segment. */
3431 static struct elf_segment_map *
3432 make_mapping (bfd *abfd,
3433 asection **sections,
3438 struct elf_segment_map *m;
3443 amt = sizeof (struct elf_segment_map);
3444 amt += (to - from - 1) * sizeof (asection *);
3445 m = bfd_zalloc (abfd, amt);
3449 m->p_type = PT_LOAD;
3450 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3451 m->sections[i - from] = *hdrpp;
3452 m->count = to - from;
3454 if (from == 0 && phdr)
3456 /* Include the headers in the first PT_LOAD segment. */
3457 m->includes_filehdr = 1;
3458 m->includes_phdrs = 1;
3464 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3467 struct elf_segment_map *
3468 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3470 struct elf_segment_map *m;
3472 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3476 m->p_type = PT_DYNAMIC;
3478 m->sections[0] = dynsec;
3483 /* Possibly add or remove segments from the segment map. */
3486 elf_modify_segment_map (bfd *abfd,
3487 struct bfd_link_info *info,
3488 bfd_boolean remove_empty_load)
3490 struct elf_segment_map **m;
3491 const struct elf_backend_data *bed;
3493 /* The placement algorithm assumes that non allocated sections are
3494 not in PT_LOAD segments. We ensure this here by removing such
3495 sections from the segment map. We also remove excluded
3496 sections. Finally, any PT_LOAD segment without sections is
3498 m = &elf_tdata (abfd)->segment_map;
3501 unsigned int i, new_count;
3503 for (new_count = 0, i = 0; i < (*m)->count; i++)
3505 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3506 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3507 || (*m)->p_type != PT_LOAD))
3509 (*m)->sections[new_count] = (*m)->sections[i];
3513 (*m)->count = new_count;
3515 if (remove_empty_load && (*m)->p_type == PT_LOAD && (*m)->count == 0)
3521 bed = get_elf_backend_data (abfd);
3522 if (bed->elf_backend_modify_segment_map != NULL)
3524 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3531 /* Set up a mapping from BFD sections to program segments. */
3534 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3537 struct elf_segment_map *m;
3538 asection **sections = NULL;
3539 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3540 bfd_boolean no_user_phdrs;
3542 no_user_phdrs = elf_tdata (abfd)->segment_map == NULL;
3543 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
3547 struct elf_segment_map *mfirst;
3548 struct elf_segment_map **pm;
3551 unsigned int phdr_index;
3552 bfd_vma maxpagesize;
3554 bfd_boolean phdr_in_segment = TRUE;
3555 bfd_boolean writable;
3557 asection *first_tls = NULL;
3558 asection *dynsec, *eh_frame_hdr;
3561 /* Select the allocated sections, and sort them. */
3563 sections = bfd_malloc2 (bfd_count_sections (abfd), sizeof (asection *));
3564 if (sections == NULL)
3568 for (s = abfd->sections; s != NULL; s = s->next)
3570 if ((s->flags & SEC_ALLOC) != 0)
3576 BFD_ASSERT (i <= bfd_count_sections (abfd));
3579 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3581 /* Build the mapping. */
3586 /* If we have a .interp section, then create a PT_PHDR segment for
3587 the program headers and a PT_INTERP segment for the .interp
3589 s = bfd_get_section_by_name (abfd, ".interp");
3590 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3592 amt = sizeof (struct elf_segment_map);
3593 m = bfd_zalloc (abfd, amt);
3597 m->p_type = PT_PHDR;
3598 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3599 m->p_flags = PF_R | PF_X;
3600 m->p_flags_valid = 1;
3601 m->includes_phdrs = 1;
3606 amt = sizeof (struct elf_segment_map);
3607 m = bfd_zalloc (abfd, amt);
3611 m->p_type = PT_INTERP;
3619 /* Look through the sections. We put sections in the same program
3620 segment when the start of the second section can be placed within
3621 a few bytes of the end of the first section. */
3625 maxpagesize = bed->maxpagesize;
3627 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3629 && (dynsec->flags & SEC_LOAD) == 0)
3632 /* Deal with -Ttext or something similar such that the first section
3633 is not adjacent to the program headers. This is an
3634 approximation, since at this point we don't know exactly how many
3635 program headers we will need. */
3638 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
3640 if (phdr_size == (bfd_size_type) -1)
3641 phdr_size = get_program_header_size (abfd, info);
3642 if ((abfd->flags & D_PAGED) == 0
3643 || sections[0]->lma < phdr_size
3644 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3645 phdr_in_segment = FALSE;
3648 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3651 bfd_boolean new_segment;
3655 /* See if this section and the last one will fit in the same
3658 if (last_hdr == NULL)
3660 /* If we don't have a segment yet, then we don't need a new
3661 one (we build the last one after this loop). */
3662 new_segment = FALSE;
3664 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3666 /* If this section has a different relation between the
3667 virtual address and the load address, then we need a new
3671 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3672 < BFD_ALIGN (hdr->lma, maxpagesize))
3674 /* If putting this section in this segment would force us to
3675 skip a page in the segment, then we need a new segment. */
3678 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3679 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3681 /* We don't want to put a loadable section after a
3682 nonloadable section in the same segment.
3683 Consider .tbss sections as loadable for this purpose. */
3686 else if ((abfd->flags & D_PAGED) == 0)
3688 /* If the file is not demand paged, which means that we
3689 don't require the sections to be correctly aligned in the
3690 file, then there is no other reason for a new segment. */
3691 new_segment = FALSE;
3694 && (hdr->flags & SEC_READONLY) == 0
3695 && (((last_hdr->lma + last_size - 1)
3696 & ~(maxpagesize - 1))
3697 != (hdr->lma & ~(maxpagesize - 1))))
3699 /* We don't want to put a writable section in a read only
3700 segment, unless they are on the same page in memory
3701 anyhow. We already know that the last section does not
3702 bring us past the current section on the page, so the
3703 only case in which the new section is not on the same
3704 page as the previous section is when the previous section
3705 ends precisely on a page boundary. */
3710 /* Otherwise, we can use the same segment. */
3711 new_segment = FALSE;
3714 /* Allow interested parties a chance to override our decision. */
3715 if (last_hdr && info->callbacks->override_segment_assignment)
3716 new_segment = info->callbacks->override_segment_assignment (info, abfd, hdr, last_hdr, new_segment);
3720 if ((hdr->flags & SEC_READONLY) == 0)
3723 /* .tbss sections effectively have zero size. */
3724 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
3725 != SEC_THREAD_LOCAL)
3726 last_size = hdr->size;
3732 /* We need a new program segment. We must create a new program
3733 header holding all the sections from phdr_index until hdr. */
3735 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3742 if ((hdr->flags & SEC_READONLY) == 0)
3748 /* .tbss sections effectively have zero size. */
3749 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3750 last_size = hdr->size;
3754 phdr_in_segment = FALSE;
3757 /* Create a final PT_LOAD program segment. */
3758 if (last_hdr != NULL)
3760 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3768 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3771 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3778 /* For each batch of consecutive loadable .note sections,
3779 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
3780 because if we link together nonloadable .note sections and
3781 loadable .note sections, we will generate two .note sections
3782 in the output file. FIXME: Using names for section types is
3784 for (s = abfd->sections; s != NULL; s = s->next)
3786 if ((s->flags & SEC_LOAD) != 0
3787 && CONST_STRNEQ (s->name, ".note"))
3791 amt = sizeof (struct elf_segment_map);
3792 if (s->alignment_power == 2)
3793 for (s2 = s; s2->next != NULL; s2 = s2->next)
3795 if (s2->next->alignment_power == 2
3796 && (s2->next->flags & SEC_LOAD) != 0
3797 && CONST_STRNEQ (s2->next->name, ".note")
3798 && align_power (s2->vma + s2->size, 2)
3804 amt += (count - 1) * sizeof (asection *);
3805 m = bfd_zalloc (abfd, amt);
3809 m->p_type = PT_NOTE;
3813 m->sections[m->count - count--] = s;
3814 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3817 m->sections[m->count - 1] = s;
3818 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3822 if (s->flags & SEC_THREAD_LOCAL)
3830 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3835 amt = sizeof (struct elf_segment_map);
3836 amt += (tls_count - 1) * sizeof (asection *);
3837 m = bfd_zalloc (abfd, amt);
3842 m->count = tls_count;
3843 /* Mandated PF_R. */
3845 m->p_flags_valid = 1;
3846 for (i = 0; i < tls_count; ++i)
3848 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3849 m->sections[i] = first_tls;
3850 first_tls = first_tls->next;
3857 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3859 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3860 if (eh_frame_hdr != NULL
3861 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3863 amt = sizeof (struct elf_segment_map);
3864 m = bfd_zalloc (abfd, amt);
3868 m->p_type = PT_GNU_EH_FRAME;
3870 m->sections[0] = eh_frame_hdr->output_section;
3876 if (elf_tdata (abfd)->stack_flags)
3878 amt = sizeof (struct elf_segment_map);
3879 m = bfd_zalloc (abfd, amt);
3883 m->p_type = PT_GNU_STACK;
3884 m->p_flags = elf_tdata (abfd)->stack_flags;
3885 m->p_flags_valid = 1;
3893 for (m = mfirst; m != NULL; m = m->next)
3895 if (m->p_type == PT_LOAD)
3897 asection *last = m->sections[m->count - 1];
3898 bfd_vma vaddr = m->sections[0]->vma;
3899 bfd_vma filesz = last->vma - vaddr + last->size;
3901 if (vaddr < info->relro_end
3902 && vaddr >= info->relro_start
3903 && (vaddr + filesz) >= info->relro_end)
3908 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
3911 amt = sizeof (struct elf_segment_map);
3912 m = bfd_zalloc (abfd, amt);
3916 m->p_type = PT_GNU_RELRO;
3918 m->p_flags_valid = 1;
3926 elf_tdata (abfd)->segment_map = mfirst;
3929 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
3932 for (count = 0, m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3934 elf_tdata (abfd)->program_header_size = count * bed->s->sizeof_phdr;
3939 if (sections != NULL)
3944 /* Sort sections by address. */
3947 elf_sort_sections (const void *arg1, const void *arg2)
3949 const asection *sec1 = *(const asection **) arg1;
3950 const asection *sec2 = *(const asection **) arg2;
3951 bfd_size_type size1, size2;
3953 /* Sort by LMA first, since this is the address used to
3954 place the section into a segment. */
3955 if (sec1->lma < sec2->lma)
3957 else if (sec1->lma > sec2->lma)
3960 /* Then sort by VMA. Normally the LMA and the VMA will be
3961 the same, and this will do nothing. */
3962 if (sec1->vma < sec2->vma)
3964 else if (sec1->vma > sec2->vma)
3967 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3969 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3975 /* If the indicies are the same, do not return 0
3976 here, but continue to try the next comparison. */
3977 if (sec1->target_index - sec2->target_index != 0)
3978 return sec1->target_index - sec2->target_index;
3983 else if (TOEND (sec2))
3988 /* Sort by size, to put zero sized sections
3989 before others at the same address. */
3991 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
3992 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
3999 return sec1->target_index - sec2->target_index;
4002 /* Ian Lance Taylor writes:
4004 We shouldn't be using % with a negative signed number. That's just
4005 not good. We have to make sure either that the number is not
4006 negative, or that the number has an unsigned type. When the types
4007 are all the same size they wind up as unsigned. When file_ptr is a
4008 larger signed type, the arithmetic winds up as signed long long,
4011 What we're trying to say here is something like ``increase OFF by
4012 the least amount that will cause it to be equal to the VMA modulo
4014 /* In other words, something like:
4016 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4017 off_offset = off % bed->maxpagesize;
4018 if (vma_offset < off_offset)
4019 adjustment = vma_offset + bed->maxpagesize - off_offset;
4021 adjustment = vma_offset - off_offset;
4023 which can can be collapsed into the expression below. */
4026 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4028 return ((vma - off) % maxpagesize);
4032 print_segment_map (const struct elf_segment_map *m)
4035 const char *pt = get_segment_type (m->p_type);
4040 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
4041 sprintf (buf, "LOPROC+%7.7x",
4042 (unsigned int) (m->p_type - PT_LOPROC));
4043 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
4044 sprintf (buf, "LOOS+%7.7x",
4045 (unsigned int) (m->p_type - PT_LOOS));
4047 snprintf (buf, sizeof (buf), "%8.8x",
4048 (unsigned int) m->p_type);
4051 fprintf (stderr, "%s:", pt);
4052 for (j = 0; j < m->count; j++)
4053 fprintf (stderr, " %s", m->sections [j]->name);
4057 /* Assign file positions to the sections based on the mapping from
4058 sections to segments. This function also sets up some fields in
4062 assign_file_positions_for_load_sections (bfd *abfd,
4063 struct bfd_link_info *link_info)
4065 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4066 struct elf_segment_map *m;
4067 Elf_Internal_Phdr *phdrs;
4068 Elf_Internal_Phdr *p;
4070 bfd_size_type maxpagesize;
4074 if (link_info == NULL
4075 && !elf_modify_segment_map (abfd, link_info, FALSE))
4079 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4082 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4083 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4084 elf_elfheader (abfd)->e_phnum = alloc;
4086 if (elf_tdata (abfd)->program_header_size == (bfd_size_type) -1)
4087 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4089 BFD_ASSERT (elf_tdata (abfd)->program_header_size
4090 >= alloc * bed->s->sizeof_phdr);
4094 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4098 phdrs = bfd_alloc2 (abfd, alloc, sizeof (Elf_Internal_Phdr));
4099 elf_tdata (abfd)->phdr = phdrs;
4104 if ((abfd->flags & D_PAGED) != 0)
4105 maxpagesize = bed->maxpagesize;
4107 off = bed->s->sizeof_ehdr;
4108 off += alloc * bed->s->sizeof_phdr;
4110 for (m = elf_tdata (abfd)->segment_map, p = phdrs, j = 0;
4112 m = m->next, p++, j++)
4116 bfd_boolean no_contents;
4118 /* If elf_segment_map is not from map_sections_to_segments, the
4119 sections may not be correctly ordered. NOTE: sorting should
4120 not be done to the PT_NOTE section of a corefile, which may
4121 contain several pseudo-sections artificially created by bfd.
4122 Sorting these pseudo-sections breaks things badly. */
4124 && !(elf_elfheader (abfd)->e_type == ET_CORE
4125 && m->p_type == PT_NOTE))
4126 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4129 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4130 number of sections with contents contributing to both p_filesz
4131 and p_memsz, followed by a number of sections with no contents
4132 that just contribute to p_memsz. In this loop, OFF tracks next
4133 available file offset for PT_LOAD and PT_NOTE segments. */
4134 p->p_type = m->p_type;
4135 p->p_flags = m->p_flags;
4140 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4142 if (m->p_paddr_valid)
4143 p->p_paddr = m->p_paddr;
4144 else if (m->count == 0)
4147 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
4149 if (p->p_type == PT_LOAD
4150 && (abfd->flags & D_PAGED) != 0)
4152 /* p_align in demand paged PT_LOAD segments effectively stores
4153 the maximum page size. When copying an executable with
4154 objcopy, we set m->p_align from the input file. Use this
4155 value for maxpagesize rather than bed->maxpagesize, which
4156 may be different. Note that we use maxpagesize for PT_TLS
4157 segment alignment later in this function, so we are relying
4158 on at least one PT_LOAD segment appearing before a PT_TLS
4160 if (m->p_align_valid)
4161 maxpagesize = m->p_align;
4163 p->p_align = maxpagesize;
4165 else if (m->p_align_valid)
4166 p->p_align = m->p_align;
4167 else if (m->count == 0)
4168 p->p_align = 1 << bed->s->log_file_align;
4172 no_contents = FALSE;
4174 if (p->p_type == PT_LOAD
4177 bfd_size_type align;
4178 unsigned int align_power = 0;
4180 if (m->p_align_valid)
4184 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4186 unsigned int secalign;
4188 secalign = bfd_get_section_alignment (abfd, *secpp);
4189 if (secalign > align_power)
4190 align_power = secalign;
4192 align = (bfd_size_type) 1 << align_power;
4193 if (align < maxpagesize)
4194 align = maxpagesize;
4197 for (i = 0; i < m->count; i++)
4198 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4199 /* If we aren't making room for this section, then
4200 it must be SHT_NOBITS regardless of what we've
4201 set via struct bfd_elf_special_section. */
4202 elf_section_type (m->sections[i]) = SHT_NOBITS;
4204 /* Find out whether this segment contains any loadable
4205 sections. If the first section isn't loadable, the same
4206 holds for any other sections. */
4208 while (elf_section_type (m->sections[i]) == SHT_NOBITS)
4210 /* If a segment starts with .tbss, we need to look
4211 at the next section to decide whether the segment
4212 has any loadable sections. */
4213 if ((elf_section_flags (m->sections[i]) & SHF_TLS) == 0
4221 off_adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4225 /* We shouldn't need to align the segment on disk since
4226 the segment doesn't need file space, but the gABI
4227 arguably requires the alignment and glibc ld.so
4228 checks it. So to comply with the alignment
4229 requirement but not waste file space, we adjust
4230 p_offset for just this segment. (OFF_ADJUST is
4231 subtracted from OFF later.) This may put p_offset
4232 past the end of file, but that shouldn't matter. */
4237 /* Make sure the .dynamic section is the first section in the
4238 PT_DYNAMIC segment. */
4239 else if (p->p_type == PT_DYNAMIC
4241 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4244 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4246 bfd_set_error (bfd_error_bad_value);
4254 if (m->includes_filehdr)
4256 if (!m->p_flags_valid)
4258 p->p_filesz = bed->s->sizeof_ehdr;
4259 p->p_memsz = bed->s->sizeof_ehdr;
4262 BFD_ASSERT (p->p_type == PT_LOAD);
4264 if (p->p_vaddr < (bfd_vma) off)
4266 (*_bfd_error_handler)
4267 (_("%B: Not enough room for program headers, try linking with -N"),
4269 bfd_set_error (bfd_error_bad_value);
4274 if (!m->p_paddr_valid)
4279 if (m->includes_phdrs)
4281 if (!m->p_flags_valid)
4284 if (!m->includes_filehdr)
4286 p->p_offset = bed->s->sizeof_ehdr;
4290 BFD_ASSERT (p->p_type == PT_LOAD);
4291 p->p_vaddr -= off - p->p_offset;
4292 if (!m->p_paddr_valid)
4293 p->p_paddr -= off - p->p_offset;
4297 p->p_filesz += alloc * bed->s->sizeof_phdr;
4298 p->p_memsz += alloc * bed->s->sizeof_phdr;
4301 if (p->p_type == PT_LOAD
4302 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4304 if (!m->includes_filehdr && !m->includes_phdrs)
4310 adjust = off - (p->p_offset + p->p_filesz);
4312 p->p_filesz += adjust;
4313 p->p_memsz += adjust;
4317 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4318 maps. Set filepos for sections in PT_LOAD segments, and in
4319 core files, for sections in PT_NOTE segments.
4320 assign_file_positions_for_non_load_sections will set filepos
4321 for other sections and update p_filesz for other segments. */
4322 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4325 bfd_size_type align;
4326 Elf_Internal_Shdr *this_hdr;
4329 this_hdr = &elf_section_data (sec)->this_hdr;
4330 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4332 if (p->p_type == PT_LOAD
4333 || p->p_type == PT_TLS)
4335 bfd_signed_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
4337 if (this_hdr->sh_type != SHT_NOBITS
4338 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4339 && ((this_hdr->sh_flags & SHF_TLS) == 0
4340 || p->p_type == PT_TLS)))
4344 (*_bfd_error_handler)
4345 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4346 abfd, sec, (unsigned long) sec->lma);
4349 p->p_memsz += adjust;
4351 if (this_hdr->sh_type != SHT_NOBITS)
4354 p->p_filesz += adjust;
4359 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4361 /* The section at i == 0 is the one that actually contains
4365 this_hdr->sh_offset = sec->filepos = off;
4366 off += this_hdr->sh_size;
4367 p->p_filesz = this_hdr->sh_size;
4373 /* The rest are fake sections that shouldn't be written. */
4382 if (p->p_type == PT_LOAD)
4384 this_hdr->sh_offset = sec->filepos = off;
4385 if (this_hdr->sh_type != SHT_NOBITS)
4386 off += this_hdr->sh_size;
4389 if (this_hdr->sh_type != SHT_NOBITS)
4391 p->p_filesz += this_hdr->sh_size;
4392 /* A load section without SHF_ALLOC is something like
4393 a note section in a PT_NOTE segment. These take
4394 file space but are not loaded into memory. */
4395 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4396 p->p_memsz += this_hdr->sh_size;
4398 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4400 if (p->p_type == PT_TLS)
4401 p->p_memsz += this_hdr->sh_size;
4403 /* .tbss is special. It doesn't contribute to p_memsz of
4405 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
4406 p->p_memsz += this_hdr->sh_size;
4409 if (align > p->p_align
4410 && !m->p_align_valid
4411 && (p->p_type != PT_LOAD
4412 || (abfd->flags & D_PAGED) == 0))
4416 if (!m->p_flags_valid)
4419 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4421 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4427 /* Check that all sections are in a PT_LOAD segment.
4428 Don't check funky gdb generated core files. */
4429 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4430 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4432 Elf_Internal_Shdr *this_hdr;
4436 this_hdr = &(elf_section_data(sec)->this_hdr);
4437 if (this_hdr->sh_size != 0
4438 && !ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, p))
4440 (*_bfd_error_handler)
4441 (_("%B: section `%A' can't be allocated in segment %d"),
4443 print_segment_map (m);
4444 bfd_set_error (bfd_error_bad_value);
4450 elf_tdata (abfd)->next_file_pos = off;
4454 /* Assign file positions for the other sections. */
4457 assign_file_positions_for_non_load_sections (bfd *abfd,
4458 struct bfd_link_info *link_info)
4460 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4461 Elf_Internal_Shdr **i_shdrpp;
4462 Elf_Internal_Shdr **hdrpp;
4463 Elf_Internal_Phdr *phdrs;
4464 Elf_Internal_Phdr *p;
4465 struct elf_segment_map *m;
4466 bfd_vma filehdr_vaddr, filehdr_paddr;
4467 bfd_vma phdrs_vaddr, phdrs_paddr;
4469 unsigned int num_sec;
4473 i_shdrpp = elf_elfsections (abfd);
4474 num_sec = elf_numsections (abfd);
4475 off = elf_tdata (abfd)->next_file_pos;
4476 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4478 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4479 Elf_Internal_Shdr *hdr;
4482 if (hdr->bfd_section != NULL
4483 && (hdr->bfd_section->filepos != 0
4484 || (hdr->sh_type == SHT_NOBITS
4485 && hdr->contents == NULL)))
4486 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
4487 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4489 if (hdr->sh_size != 0)
4490 ((*_bfd_error_handler)
4491 (_("%B: warning: allocated section `%s' not in segment"),
4493 (hdr->bfd_section == NULL
4495 : hdr->bfd_section->name)));
4496 /* We don't need to page align empty sections. */
4497 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
4498 off += vma_page_aligned_bias (hdr->sh_addr, off,
4501 off += vma_page_aligned_bias (hdr->sh_addr, off,
4503 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4506 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4507 && hdr->bfd_section == NULL)
4508 || hdr == i_shdrpp[tdata->symtab_section]
4509 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4510 || hdr == i_shdrpp[tdata->strtab_section])
4511 hdr->sh_offset = -1;
4513 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4515 if (i == SHN_LORESERVE - 1)
4517 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4518 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4522 /* Now that we have set the section file positions, we can set up
4523 the file positions for the non PT_LOAD segments. */
4527 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4529 phdrs = elf_tdata (abfd)->phdr;
4530 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4535 if (p->p_type != PT_LOAD)
4538 if (m->includes_filehdr)
4540 filehdr_vaddr = p->p_vaddr;
4541 filehdr_paddr = p->p_paddr;
4543 if (m->includes_phdrs)
4545 phdrs_vaddr = p->p_vaddr;
4546 phdrs_paddr = p->p_paddr;
4547 if (m->includes_filehdr)
4549 phdrs_vaddr += bed->s->sizeof_ehdr;
4550 phdrs_paddr += bed->s->sizeof_ehdr;
4555 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4561 if (p->p_type != PT_LOAD
4562 && (p->p_type != PT_NOTE
4563 || bfd_get_format (abfd) != bfd_core))
4565 Elf_Internal_Shdr *hdr;
4568 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4570 sect = m->sections[m->count - 1];
4571 hdr = &elf_section_data (sect)->this_hdr;
4572 p->p_filesz = sect->filepos - m->sections[0]->filepos;
4573 if (hdr->sh_type != SHT_NOBITS)
4574 p->p_filesz += hdr->sh_size;
4576 if (p->p_type == PT_GNU_RELRO)
4578 /* When we get here, we are copying executable
4579 or shared library. But we need to use the same
4581 Elf_Internal_Phdr *lp;
4583 for (lp = phdrs; lp < phdrs + count; ++lp)
4585 if (lp->p_type == PT_LOAD
4586 && lp->p_paddr == p->p_paddr)
4590 if (lp < phdrs + count)
4592 /* We should use p_size if it is valid since it
4593 may contain the first few bytes of the next
4594 SEC_ALLOC section. */
4595 if (m->p_size_valid)
4596 p->p_filesz = m->p_size;
4599 p->p_vaddr = lp->p_vaddr;
4600 p->p_offset = lp->p_offset;
4601 p->p_memsz = p->p_filesz;
4608 p->p_offset = m->sections[0]->filepos;
4613 if (m->includes_filehdr)
4615 p->p_vaddr = filehdr_vaddr;
4616 if (! m->p_paddr_valid)
4617 p->p_paddr = filehdr_paddr;
4619 else if (m->includes_phdrs)
4621 p->p_vaddr = phdrs_vaddr;
4622 if (! m->p_paddr_valid)
4623 p->p_paddr = phdrs_paddr;
4625 else if (p->p_type == PT_GNU_RELRO)
4627 Elf_Internal_Phdr *lp;
4629 for (lp = phdrs; lp < phdrs + count; ++lp)
4631 if (lp->p_type == PT_LOAD
4632 && lp->p_vaddr <= link_info->relro_end
4633 && lp->p_vaddr >= link_info->relro_start
4634 && (lp->p_vaddr + lp->p_filesz
4635 >= link_info->relro_end))
4639 if (lp < phdrs + count
4640 && link_info->relro_end > lp->p_vaddr)
4642 p->p_vaddr = lp->p_vaddr;
4643 p->p_paddr = lp->p_paddr;
4644 p->p_offset = lp->p_offset;
4645 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4646 p->p_memsz = p->p_filesz;
4648 p->p_flags = (lp->p_flags & ~PF_W);
4652 memset (p, 0, sizeof *p);
4653 p->p_type = PT_NULL;
4659 elf_tdata (abfd)->next_file_pos = off;
4664 /* Work out the file positions of all the sections. This is called by
4665 _bfd_elf_compute_section_file_positions. All the section sizes and
4666 VMAs must be known before this is called.
4668 Reloc sections come in two flavours: Those processed specially as
4669 "side-channel" data attached to a section to which they apply, and
4670 those that bfd doesn't process as relocations. The latter sort are
4671 stored in a normal bfd section by bfd_section_from_shdr. We don't
4672 consider the former sort here, unless they form part of the loadable
4673 image. Reloc sections not assigned here will be handled later by
4674 assign_file_positions_for_relocs.
4676 We also don't set the positions of the .symtab and .strtab here. */
4679 assign_file_positions_except_relocs (bfd *abfd,
4680 struct bfd_link_info *link_info)
4682 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4683 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4685 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4687 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4688 && bfd_get_format (abfd) != bfd_core)
4690 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4691 unsigned int num_sec = elf_numsections (abfd);
4692 Elf_Internal_Shdr **hdrpp;
4695 /* Start after the ELF header. */
4696 off = i_ehdrp->e_ehsize;
4698 /* We are not creating an executable, which means that we are
4699 not creating a program header, and that the actual order of
4700 the sections in the file is unimportant. */
4701 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4703 Elf_Internal_Shdr *hdr;
4706 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4707 && hdr->bfd_section == NULL)
4708 || i == tdata->symtab_section
4709 || i == tdata->symtab_shndx_section
4710 || i == tdata->strtab_section)
4712 hdr->sh_offset = -1;
4715 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4717 if (i == SHN_LORESERVE - 1)
4719 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4720 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4728 /* Assign file positions for the loaded sections based on the
4729 assignment of sections to segments. */
4730 if (!assign_file_positions_for_load_sections (abfd, link_info))
4733 /* And for non-load sections. */
4734 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
4737 if (bed->elf_backend_modify_program_headers != NULL)
4739 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
4743 /* Write out the program headers. */
4744 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
4745 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4746 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
4749 off = tdata->next_file_pos;
4752 /* Place the section headers. */
4753 off = align_file_position (off, 1 << bed->s->log_file_align);
4754 i_ehdrp->e_shoff = off;
4755 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4757 tdata->next_file_pos = off;
4763 prep_headers (bfd *abfd)
4765 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4766 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4767 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4768 struct elf_strtab_hash *shstrtab;
4769 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4771 i_ehdrp = elf_elfheader (abfd);
4772 i_shdrp = elf_elfsections (abfd);
4774 shstrtab = _bfd_elf_strtab_init ();
4775 if (shstrtab == NULL)
4778 elf_shstrtab (abfd) = shstrtab;
4780 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4781 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4782 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4783 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4785 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4786 i_ehdrp->e_ident[EI_DATA] =
4787 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4788 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4790 if ((abfd->flags & DYNAMIC) != 0)
4791 i_ehdrp->e_type = ET_DYN;
4792 else if ((abfd->flags & EXEC_P) != 0)
4793 i_ehdrp->e_type = ET_EXEC;
4794 else if (bfd_get_format (abfd) == bfd_core)
4795 i_ehdrp->e_type = ET_CORE;
4797 i_ehdrp->e_type = ET_REL;
4799 switch (bfd_get_arch (abfd))
4801 case bfd_arch_unknown:
4802 i_ehdrp->e_machine = EM_NONE;
4805 /* There used to be a long list of cases here, each one setting
4806 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4807 in the corresponding bfd definition. To avoid duplication,
4808 the switch was removed. Machines that need special handling
4809 can generally do it in elf_backend_final_write_processing(),
4810 unless they need the information earlier than the final write.
4811 Such need can generally be supplied by replacing the tests for
4812 e_machine with the conditions used to determine it. */
4814 i_ehdrp->e_machine = bed->elf_machine_code;
4817 i_ehdrp->e_version = bed->s->ev_current;
4818 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4820 /* No program header, for now. */
4821 i_ehdrp->e_phoff = 0;
4822 i_ehdrp->e_phentsize = 0;
4823 i_ehdrp->e_phnum = 0;
4825 /* Each bfd section is section header entry. */
4826 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4827 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4829 /* If we're building an executable, we'll need a program header table. */
4830 if (abfd->flags & EXEC_P)
4831 /* It all happens later. */
4835 i_ehdrp->e_phentsize = 0;
4837 i_ehdrp->e_phoff = 0;
4840 elf_tdata (abfd)->symtab_hdr.sh_name =
4841 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4842 elf_tdata (abfd)->strtab_hdr.sh_name =
4843 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4844 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4845 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4846 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4847 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4848 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4854 /* Assign file positions for all the reloc sections which are not part
4855 of the loadable file image. */
4858 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4861 unsigned int i, num_sec;
4862 Elf_Internal_Shdr **shdrpp;
4864 off = elf_tdata (abfd)->next_file_pos;
4866 num_sec = elf_numsections (abfd);
4867 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4869 Elf_Internal_Shdr *shdrp;
4872 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4873 && shdrp->sh_offset == -1)
4874 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4877 elf_tdata (abfd)->next_file_pos = off;
4881 _bfd_elf_write_object_contents (bfd *abfd)
4883 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4884 Elf_Internal_Ehdr *i_ehdrp;
4885 Elf_Internal_Shdr **i_shdrp;
4887 unsigned int count, num_sec;
4889 if (! abfd->output_has_begun
4890 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4893 i_shdrp = elf_elfsections (abfd);
4894 i_ehdrp = elf_elfheader (abfd);
4897 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4901 _bfd_elf_assign_file_positions_for_relocs (abfd);
4903 /* After writing the headers, we need to write the sections too... */
4904 num_sec = elf_numsections (abfd);
4905 for (count = 1; count < num_sec; count++)
4907 if (bed->elf_backend_section_processing)
4908 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4909 if (i_shdrp[count]->contents)
4911 bfd_size_type amt = i_shdrp[count]->sh_size;
4913 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4914 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4917 if (count == SHN_LORESERVE - 1)
4918 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4921 /* Write out the section header names. */
4922 if (elf_shstrtab (abfd) != NULL
4923 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4924 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
4927 if (bed->elf_backend_final_write_processing)
4928 (*bed->elf_backend_final_write_processing) (abfd,
4929 elf_tdata (abfd)->linker);
4931 if (!bed->s->write_shdrs_and_ehdr (abfd))
4934 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
4935 if (elf_tdata (abfd)->after_write_object_contents)
4936 return (*elf_tdata (abfd)->after_write_object_contents) (abfd);
4942 _bfd_elf_write_corefile_contents (bfd *abfd)
4944 /* Hopefully this can be done just like an object file. */
4945 return _bfd_elf_write_object_contents (abfd);
4948 /* Given a section, search the header to find them. */
4951 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4953 const struct elf_backend_data *bed;
4956 if (elf_section_data (asect) != NULL
4957 && elf_section_data (asect)->this_idx != 0)
4958 return elf_section_data (asect)->this_idx;
4960 if (bfd_is_abs_section (asect))
4962 else if (bfd_is_com_section (asect))
4964 else if (bfd_is_und_section (asect))
4969 bed = get_elf_backend_data (abfd);
4970 if (bed->elf_backend_section_from_bfd_section)
4974 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4979 bfd_set_error (bfd_error_nonrepresentable_section);
4984 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4988 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
4990 asymbol *asym_ptr = *asym_ptr_ptr;
4992 flagword flags = asym_ptr->flags;
4994 /* When gas creates relocations against local labels, it creates its
4995 own symbol for the section, but does put the symbol into the
4996 symbol chain, so udata is 0. When the linker is generating
4997 relocatable output, this section symbol may be for one of the
4998 input sections rather than the output section. */
4999 if (asym_ptr->udata.i == 0
5000 && (flags & BSF_SECTION_SYM)
5001 && asym_ptr->section)
5006 sec = asym_ptr->section;
5007 if (sec->owner != abfd && sec->output_section != NULL)
5008 sec = sec->output_section;
5009 if (sec->owner == abfd
5010 && (indx = sec->index) < elf_num_section_syms (abfd)
5011 && elf_section_syms (abfd)[indx] != NULL)
5012 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5015 idx = asym_ptr->udata.i;
5019 /* This case can occur when using --strip-symbol on a symbol
5020 which is used in a relocation entry. */
5021 (*_bfd_error_handler)
5022 (_("%B: symbol `%s' required but not present"),
5023 abfd, bfd_asymbol_name (asym_ptr));
5024 bfd_set_error (bfd_error_no_symbols);
5031 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5032 (long) asym_ptr, asym_ptr->name, idx, flags,
5033 elf_symbol_flags (flags));
5041 /* Rewrite program header information. */
5044 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
5046 Elf_Internal_Ehdr *iehdr;
5047 struct elf_segment_map *map;
5048 struct elf_segment_map *map_first;
5049 struct elf_segment_map **pointer_to_map;
5050 Elf_Internal_Phdr *segment;
5053 unsigned int num_segments;
5054 bfd_boolean phdr_included = FALSE;
5055 bfd_vma maxpagesize;
5056 struct elf_segment_map *phdr_adjust_seg = NULL;
5057 unsigned int phdr_adjust_num = 0;
5058 const struct elf_backend_data *bed;
5060 bed = get_elf_backend_data (ibfd);
5061 iehdr = elf_elfheader (ibfd);
5064 pointer_to_map = &map_first;
5066 num_segments = elf_elfheader (ibfd)->e_phnum;
5067 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5069 /* Returns the end address of the segment + 1. */
5070 #define SEGMENT_END(segment, start) \
5071 (start + (segment->p_memsz > segment->p_filesz \
5072 ? segment->p_memsz : segment->p_filesz))
5074 #define SECTION_SIZE(section, segment) \
5075 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5076 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5077 ? section->size : 0)
5079 /* Returns TRUE if the given section is contained within
5080 the given segment. VMA addresses are compared. */
5081 #define IS_CONTAINED_BY_VMA(section, segment) \
5082 (section->vma >= segment->p_vaddr \
5083 && (section->vma + SECTION_SIZE (section, segment) \
5084 <= (SEGMENT_END (segment, segment->p_vaddr))))
5086 /* Returns TRUE if the given section is contained within
5087 the given segment. LMA addresses are compared. */
5088 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5089 (section->lma >= base \
5090 && (section->lma + SECTION_SIZE (section, segment) \
5091 <= SEGMENT_END (segment, base)))
5093 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5094 #define IS_COREFILE_NOTE(p, s) \
5095 (p->p_type == PT_NOTE \
5096 && bfd_get_format (ibfd) == bfd_core \
5097 && s->vma == 0 && s->lma == 0 \
5098 && (bfd_vma) s->filepos >= p->p_offset \
5099 && ((bfd_vma) s->filepos + s->size \
5100 <= p->p_offset + p->p_filesz))
5102 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5103 linker, which generates a PT_INTERP section with p_vaddr and
5104 p_memsz set to 0. */
5105 #define IS_SOLARIS_PT_INTERP(p, s) \
5107 && p->p_paddr == 0 \
5108 && p->p_memsz == 0 \
5109 && p->p_filesz > 0 \
5110 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5112 && (bfd_vma) s->filepos >= p->p_offset \
5113 && ((bfd_vma) s->filepos + s->size \
5114 <= p->p_offset + p->p_filesz))
5116 /* Decide if the given section should be included in the given segment.
5117 A section will be included if:
5118 1. It is within the address space of the segment -- we use the LMA
5119 if that is set for the segment and the VMA otherwise,
5120 2. It is an allocated segment,
5121 3. There is an output section associated with it,
5122 4. The section has not already been allocated to a previous segment.
5123 5. PT_GNU_STACK segments do not include any sections.
5124 6. PT_TLS segment includes only SHF_TLS sections.
5125 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5126 8. PT_DYNAMIC should not contain empty sections at the beginning
5127 (with the possible exception of .dynamic). */
5128 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5129 ((((segment->p_paddr \
5130 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5131 : IS_CONTAINED_BY_VMA (section, segment)) \
5132 && (section->flags & SEC_ALLOC) != 0) \
5133 || IS_COREFILE_NOTE (segment, section)) \
5134 && segment->p_type != PT_GNU_STACK \
5135 && (segment->p_type != PT_TLS \
5136 || (section->flags & SEC_THREAD_LOCAL)) \
5137 && (segment->p_type == PT_LOAD \
5138 || segment->p_type == PT_TLS \
5139 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5140 && (segment->p_type != PT_DYNAMIC \
5141 || SECTION_SIZE (section, segment) > 0 \
5142 || (segment->p_paddr \
5143 ? segment->p_paddr != section->lma \
5144 : segment->p_vaddr != section->vma) \
5145 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5147 && ! section->segment_mark)
5149 /* If the output section of a section in the input segment is NULL,
5150 it is removed from the corresponding output segment. */
5151 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5152 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5153 && section->output_section != NULL)
5155 /* Returns TRUE iff seg1 starts after the end of seg2. */
5156 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5157 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5159 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5160 their VMA address ranges and their LMA address ranges overlap.
5161 It is possible to have overlapping VMA ranges without overlapping LMA
5162 ranges. RedBoot images for example can have both .data and .bss mapped
5163 to the same VMA range, but with the .data section mapped to a different
5165 #define SEGMENT_OVERLAPS(seg1, seg2) \
5166 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5167 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5168 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5169 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5171 /* Initialise the segment mark field. */
5172 for (section = ibfd->sections; section != NULL; section = section->next)
5173 section->segment_mark = FALSE;
5175 /* Scan through the segments specified in the program header
5176 of the input BFD. For this first scan we look for overlaps
5177 in the loadable segments. These can be created by weird
5178 parameters to objcopy. Also, fix some solaris weirdness. */
5179 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5184 Elf_Internal_Phdr *segment2;
5186 if (segment->p_type == PT_INTERP)
5187 for (section = ibfd->sections; section; section = section->next)
5188 if (IS_SOLARIS_PT_INTERP (segment, section))
5190 /* Mininal change so that the normal section to segment
5191 assignment code will work. */
5192 segment->p_vaddr = section->vma;
5196 if (segment->p_type != PT_LOAD)
5198 /* Remove PT_GNU_RELRO segment. */
5199 if (segment->p_type == PT_GNU_RELRO)
5200 segment->p_type = PT_NULL;
5204 /* Determine if this segment overlaps any previous segments. */
5205 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
5207 bfd_signed_vma extra_length;
5209 if (segment2->p_type != PT_LOAD
5210 || ! SEGMENT_OVERLAPS (segment, segment2))
5213 /* Merge the two segments together. */
5214 if (segment2->p_vaddr < segment->p_vaddr)
5216 /* Extend SEGMENT2 to include SEGMENT and then delete
5219 SEGMENT_END (segment, segment->p_vaddr)
5220 - SEGMENT_END (segment2, segment2->p_vaddr);
5222 if (extra_length > 0)
5224 segment2->p_memsz += extra_length;
5225 segment2->p_filesz += extra_length;
5228 segment->p_type = PT_NULL;
5230 /* Since we have deleted P we must restart the outer loop. */
5232 segment = elf_tdata (ibfd)->phdr;
5237 /* Extend SEGMENT to include SEGMENT2 and then delete
5240 SEGMENT_END (segment2, segment2->p_vaddr)
5241 - SEGMENT_END (segment, segment->p_vaddr);
5243 if (extra_length > 0)
5245 segment->p_memsz += extra_length;
5246 segment->p_filesz += extra_length;
5249 segment2->p_type = PT_NULL;
5254 /* The second scan attempts to assign sections to segments. */
5255 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5259 unsigned int section_count;
5260 asection ** sections;
5261 asection * output_section;
5263 bfd_vma matching_lma;
5264 bfd_vma suggested_lma;
5267 asection * first_section;
5269 if (segment->p_type == PT_NULL)
5272 first_section = NULL;
5273 /* Compute how many sections might be placed into this segment. */
5274 for (section = ibfd->sections, section_count = 0;
5276 section = section->next)
5278 /* Find the first section in the input segment, which may be
5279 removed from the corresponding output segment. */
5280 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5282 if (first_section == NULL)
5283 first_section = section;
5284 if (section->output_section != NULL)
5289 /* Allocate a segment map big enough to contain
5290 all of the sections we have selected. */
5291 amt = sizeof (struct elf_segment_map);
5292 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5293 map = bfd_zalloc (obfd, amt);
5297 /* Initialise the fields of the segment map. Default to
5298 using the physical address of the segment in the input BFD. */
5300 map->p_type = segment->p_type;
5301 map->p_flags = segment->p_flags;
5302 map->p_flags_valid = 1;
5304 /* If the first section in the input segment is removed, there is
5305 no need to preserve segment physical address in the corresponding
5307 if (!first_section || first_section->output_section != NULL)
5309 map->p_paddr = segment->p_paddr;
5310 map->p_paddr_valid = 1;
5313 /* Determine if this segment contains the ELF file header
5314 and if it contains the program headers themselves. */
5315 map->includes_filehdr = (segment->p_offset == 0
5316 && segment->p_filesz >= iehdr->e_ehsize);
5318 map->includes_phdrs = 0;
5320 if (! phdr_included || segment->p_type != PT_LOAD)
5322 map->includes_phdrs =
5323 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5324 && (segment->p_offset + segment->p_filesz
5325 >= ((bfd_vma) iehdr->e_phoff
5326 + iehdr->e_phnum * iehdr->e_phentsize)));
5328 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5329 phdr_included = TRUE;
5332 if (section_count == 0)
5334 /* Special segments, such as the PT_PHDR segment, may contain
5335 no sections, but ordinary, loadable segments should contain
5336 something. They are allowed by the ELF spec however, so only
5337 a warning is produced. */
5338 if (segment->p_type == PT_LOAD)
5339 (*_bfd_error_handler)
5340 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5344 *pointer_to_map = map;
5345 pointer_to_map = &map->next;
5350 /* Now scan the sections in the input BFD again and attempt
5351 to add their corresponding output sections to the segment map.
5352 The problem here is how to handle an output section which has
5353 been moved (ie had its LMA changed). There are four possibilities:
5355 1. None of the sections have been moved.
5356 In this case we can continue to use the segment LMA from the
5359 2. All of the sections have been moved by the same amount.
5360 In this case we can change the segment's LMA to match the LMA
5361 of the first section.
5363 3. Some of the sections have been moved, others have not.
5364 In this case those sections which have not been moved can be
5365 placed in the current segment which will have to have its size,
5366 and possibly its LMA changed, and a new segment or segments will
5367 have to be created to contain the other sections.
5369 4. The sections have been moved, but not by the same amount.
5370 In this case we can change the segment's LMA to match the LMA
5371 of the first section and we will have to create a new segment
5372 or segments to contain the other sections.
5374 In order to save time, we allocate an array to hold the section
5375 pointers that we are interested in. As these sections get assigned
5376 to a segment, they are removed from this array. */
5378 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5379 to work around this long long bug. */
5380 sections = bfd_malloc2 (section_count, sizeof (asection *));
5381 if (sections == NULL)
5384 /* Step One: Scan for segment vs section LMA conflicts.
5385 Also add the sections to the section array allocated above.
5386 Also add the sections to the current segment. In the common
5387 case, where the sections have not been moved, this means that
5388 we have completely filled the segment, and there is nothing
5394 for (j = 0, section = ibfd->sections;
5396 section = section->next)
5398 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5400 output_section = section->output_section;
5402 sections[j ++] = section;
5404 /* The Solaris native linker always sets p_paddr to 0.
5405 We try to catch that case here, and set it to the
5406 correct value. Note - some backends require that
5407 p_paddr be left as zero. */
5408 if (segment->p_paddr == 0
5409 && segment->p_vaddr != 0
5410 && (! bed->want_p_paddr_set_to_zero)
5412 && output_section->lma != 0
5413 && (output_section->vma == (segment->p_vaddr
5414 + (map->includes_filehdr
5417 + (map->includes_phdrs
5419 * iehdr->e_phentsize)
5421 map->p_paddr = segment->p_vaddr;
5423 /* Match up the physical address of the segment with the
5424 LMA address of the output section. */
5425 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5426 || IS_COREFILE_NOTE (segment, section)
5427 || (bed->want_p_paddr_set_to_zero &&
5428 IS_CONTAINED_BY_VMA (output_section, segment)))
5430 if (matching_lma == 0 || output_section->lma < matching_lma)
5431 matching_lma = output_section->lma;
5433 /* We assume that if the section fits within the segment
5434 then it does not overlap any other section within that
5436 map->sections[isec ++] = output_section;
5438 else if (suggested_lma == 0)
5439 suggested_lma = output_section->lma;
5443 BFD_ASSERT (j == section_count);
5445 /* Step Two: Adjust the physical address of the current segment,
5447 if (isec == section_count)
5449 /* All of the sections fitted within the segment as currently
5450 specified. This is the default case. Add the segment to
5451 the list of built segments and carry on to process the next
5452 program header in the input BFD. */
5453 map->count = section_count;
5454 *pointer_to_map = map;
5455 pointer_to_map = &map->next;
5457 if (matching_lma != map->p_paddr
5458 && !map->includes_filehdr && !map->includes_phdrs)
5459 /* There is some padding before the first section in the
5460 segment. So, we must account for that in the output
5462 map->p_vaddr_offset = matching_lma - map->p_paddr;
5469 if (matching_lma != 0)
5471 /* At least one section fits inside the current segment.
5472 Keep it, but modify its physical address to match the
5473 LMA of the first section that fitted. */
5474 map->p_paddr = matching_lma;
5478 /* None of the sections fitted inside the current segment.
5479 Change the current segment's physical address to match
5480 the LMA of the first section. */
5481 map->p_paddr = suggested_lma;
5484 /* Offset the segment physical address from the lma
5485 to allow for space taken up by elf headers. */
5486 if (map->includes_filehdr)
5487 map->p_paddr -= iehdr->e_ehsize;
5489 if (map->includes_phdrs)
5491 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5493 /* iehdr->e_phnum is just an estimate of the number
5494 of program headers that we will need. Make a note
5495 here of the number we used and the segment we chose
5496 to hold these headers, so that we can adjust the
5497 offset when we know the correct value. */
5498 phdr_adjust_num = iehdr->e_phnum;
5499 phdr_adjust_seg = map;
5503 /* Step Three: Loop over the sections again, this time assigning
5504 those that fit to the current segment and removing them from the
5505 sections array; but making sure not to leave large gaps. Once all
5506 possible sections have been assigned to the current segment it is
5507 added to the list of built segments and if sections still remain
5508 to be assigned, a new segment is constructed before repeating
5516 /* Fill the current segment with sections that fit. */
5517 for (j = 0; j < section_count; j++)
5519 section = sections[j];
5521 if (section == NULL)
5524 output_section = section->output_section;
5526 BFD_ASSERT (output_section != NULL);
5528 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5529 || IS_COREFILE_NOTE (segment, section))
5531 if (map->count == 0)
5533 /* If the first section in a segment does not start at
5534 the beginning of the segment, then something is
5536 if (output_section->lma !=
5538 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5539 + (map->includes_phdrs
5540 ? iehdr->e_phnum * iehdr->e_phentsize
5546 asection * prev_sec;
5548 prev_sec = map->sections[map->count - 1];
5550 /* If the gap between the end of the previous section
5551 and the start of this section is more than
5552 maxpagesize then we need to start a new segment. */
5553 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5555 < BFD_ALIGN (output_section->lma, maxpagesize))
5556 || ((prev_sec->lma + prev_sec->size)
5557 > output_section->lma))
5559 if (suggested_lma == 0)
5560 suggested_lma = output_section->lma;
5566 map->sections[map->count++] = output_section;
5569 section->segment_mark = TRUE;
5571 else if (suggested_lma == 0)
5572 suggested_lma = output_section->lma;
5575 BFD_ASSERT (map->count > 0);
5577 /* Add the current segment to the list of built segments. */
5578 *pointer_to_map = map;
5579 pointer_to_map = &map->next;
5581 if (isec < section_count)
5583 /* We still have not allocated all of the sections to
5584 segments. Create a new segment here, initialise it
5585 and carry on looping. */
5586 amt = sizeof (struct elf_segment_map);
5587 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5588 map = bfd_alloc (obfd, amt);
5595 /* Initialise the fields of the segment map. Set the physical
5596 physical address to the LMA of the first section that has
5597 not yet been assigned. */
5599 map->p_type = segment->p_type;
5600 map->p_flags = segment->p_flags;
5601 map->p_flags_valid = 1;
5602 map->p_paddr = suggested_lma;
5603 map->p_paddr_valid = 1;
5604 map->includes_filehdr = 0;
5605 map->includes_phdrs = 0;
5608 while (isec < section_count);
5613 /* The Solaris linker creates program headers in which all the
5614 p_paddr fields are zero. When we try to objcopy or strip such a
5615 file, we get confused. Check for this case, and if we find it
5616 reset the p_paddr_valid fields. */
5617 for (map = map_first; map != NULL; map = map->next)
5618 if (map->p_paddr != 0)
5621 for (map = map_first; map != NULL; map = map->next)
5622 map->p_paddr_valid = 0;
5624 elf_tdata (obfd)->segment_map = map_first;
5626 /* If we had to estimate the number of program headers that were
5627 going to be needed, then check our estimate now and adjust
5628 the offset if necessary. */
5629 if (phdr_adjust_seg != NULL)
5633 for (count = 0, map = map_first; map != NULL; map = map->next)
5636 if (count > phdr_adjust_num)
5637 phdr_adjust_seg->p_paddr
5638 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5643 #undef IS_CONTAINED_BY_VMA
5644 #undef IS_CONTAINED_BY_LMA
5645 #undef IS_COREFILE_NOTE
5646 #undef IS_SOLARIS_PT_INTERP
5647 #undef IS_SECTION_IN_INPUT_SEGMENT
5648 #undef INCLUDE_SECTION_IN_SEGMENT
5649 #undef SEGMENT_AFTER_SEGMENT
5650 #undef SEGMENT_OVERLAPS
5654 /* Copy ELF program header information. */
5657 copy_elf_program_header (bfd *ibfd, bfd *obfd)
5659 Elf_Internal_Ehdr *iehdr;
5660 struct elf_segment_map *map;
5661 struct elf_segment_map *map_first;
5662 struct elf_segment_map **pointer_to_map;
5663 Elf_Internal_Phdr *segment;
5665 unsigned int num_segments;
5666 bfd_boolean phdr_included = FALSE;
5668 iehdr = elf_elfheader (ibfd);
5671 pointer_to_map = &map_first;
5673 num_segments = elf_elfheader (ibfd)->e_phnum;
5674 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5679 unsigned int section_count;
5681 Elf_Internal_Shdr *this_hdr;
5682 asection *first_section = NULL;
5683 asection *lowest_section = NULL;
5685 /* Compute how many sections are in this segment. */
5686 for (section = ibfd->sections, section_count = 0;
5688 section = section->next)
5690 this_hdr = &(elf_section_data(section)->this_hdr);
5691 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5694 first_section = lowest_section = section;
5695 if (section->lma < lowest_section->lma)
5696 lowest_section = section;
5701 /* Allocate a segment map big enough to contain
5702 all of the sections we have selected. */
5703 amt = sizeof (struct elf_segment_map);
5704 if (section_count != 0)
5705 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5706 map = bfd_zalloc (obfd, amt);
5710 /* Initialize the fields of the output segment map with the
5713 map->p_type = segment->p_type;
5714 map->p_flags = segment->p_flags;
5715 map->p_flags_valid = 1;
5716 map->p_paddr = segment->p_paddr;
5717 map->p_paddr_valid = 1;
5718 map->p_align = segment->p_align;
5719 map->p_align_valid = 1;
5720 map->p_vaddr_offset = 0;
5722 if (map->p_type == PT_GNU_RELRO
5723 && segment->p_filesz == segment->p_memsz)
5725 /* The PT_GNU_RELRO segment may contain the first a few
5726 bytes in the .got.plt section even if the whole .got.plt
5727 section isn't in the PT_GNU_RELRO segment. We won't
5728 change the size of the PT_GNU_RELRO segment. */
5729 map->p_size = segment->p_filesz;
5730 map->p_size_valid = 1;
5733 /* Determine if this segment contains the ELF file header
5734 and if it contains the program headers themselves. */
5735 map->includes_filehdr = (segment->p_offset == 0
5736 && segment->p_filesz >= iehdr->e_ehsize);
5738 map->includes_phdrs = 0;
5739 if (! phdr_included || segment->p_type != PT_LOAD)
5741 map->includes_phdrs =
5742 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5743 && (segment->p_offset + segment->p_filesz
5744 >= ((bfd_vma) iehdr->e_phoff
5745 + iehdr->e_phnum * iehdr->e_phentsize)));
5747 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5748 phdr_included = TRUE;
5751 if (!map->includes_phdrs && !map->includes_filehdr)
5752 /* There is some other padding before the first section. */
5753 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
5754 - segment->p_paddr);
5756 if (section_count != 0)
5758 unsigned int isec = 0;
5760 for (section = first_section;
5762 section = section->next)
5764 this_hdr = &(elf_section_data(section)->this_hdr);
5765 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5767 map->sections[isec++] = section->output_section;
5768 if (isec == section_count)
5774 map->count = section_count;
5775 *pointer_to_map = map;
5776 pointer_to_map = &map->next;
5779 elf_tdata (obfd)->segment_map = map_first;
5783 /* Copy private BFD data. This copies or rewrites ELF program header
5787 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5789 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5790 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5793 if (elf_tdata (ibfd)->phdr == NULL)
5796 if (ibfd->xvec == obfd->xvec)
5798 /* Check to see if any sections in the input BFD
5799 covered by ELF program header have changed. */
5800 Elf_Internal_Phdr *segment;
5801 asection *section, *osec;
5802 unsigned int i, num_segments;
5803 Elf_Internal_Shdr *this_hdr;
5805 /* Initialize the segment mark field. */
5806 for (section = obfd->sections; section != NULL;
5807 section = section->next)
5808 section->segment_mark = FALSE;
5810 num_segments = elf_elfheader (ibfd)->e_phnum;
5811 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5815 /* PR binutils/3535. The Solaris linker always sets the p_paddr
5816 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
5817 which severly confuses things, so always regenerate the segment
5818 map in this case. */
5819 if (segment->p_paddr == 0
5820 && segment->p_memsz == 0
5821 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
5824 for (section = ibfd->sections;
5825 section != NULL; section = section->next)
5827 /* We mark the output section so that we know it comes
5828 from the input BFD. */
5829 osec = section->output_section;
5831 osec->segment_mark = TRUE;
5833 /* Check if this section is covered by the segment. */
5834 this_hdr = &(elf_section_data(section)->this_hdr);
5835 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5837 /* FIXME: Check if its output section is changed or
5838 removed. What else do we need to check? */
5840 || section->flags != osec->flags
5841 || section->lma != osec->lma
5842 || section->vma != osec->vma
5843 || section->size != osec->size
5844 || section->rawsize != osec->rawsize
5845 || section->alignment_power != osec->alignment_power)
5851 /* Check to see if any output section do not come from the
5853 for (section = obfd->sections; section != NULL;
5854 section = section->next)
5856 if (section->segment_mark == FALSE)
5859 section->segment_mark = FALSE;
5862 return copy_elf_program_header (ibfd, obfd);
5866 return rewrite_elf_program_header (ibfd, obfd);
5869 /* Initialize private output section information from input section. */
5872 _bfd_elf_init_private_section_data (bfd *ibfd,
5876 struct bfd_link_info *link_info)
5879 Elf_Internal_Shdr *ihdr, *ohdr;
5880 bfd_boolean need_group = link_info == NULL || link_info->relocatable;
5882 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5883 || obfd->xvec->flavour != bfd_target_elf_flavour)
5886 /* Don't copy the output ELF section type from input if the
5887 output BFD section flags have been set to something different.
5888 elf_fake_sections will set ELF section type based on BFD
5890 if (elf_section_type (osec) == SHT_NULL
5891 && (osec->flags == isec->flags || !osec->flags))
5892 elf_section_type (osec) = elf_section_type (isec);
5894 /* FIXME: Is this correct for all OS/PROC specific flags? */
5895 elf_section_flags (osec) |= (elf_section_flags (isec)
5896 & (SHF_MASKOS | SHF_MASKPROC));
5898 /* Set things up for objcopy and relocatable link. The output
5899 SHT_GROUP section will have its elf_next_in_group pointing back
5900 to the input group members. Ignore linker created group section.
5901 See elfNN_ia64_object_p in elfxx-ia64.c. */
5904 if (elf_sec_group (isec) == NULL
5905 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
5907 if (elf_section_flags (isec) & SHF_GROUP)
5908 elf_section_flags (osec) |= SHF_GROUP;
5909 elf_next_in_group (osec) = elf_next_in_group (isec);
5910 elf_group_name (osec) = elf_group_name (isec);
5914 ihdr = &elf_section_data (isec)->this_hdr;
5916 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
5917 don't use the output section of the linked-to section since it
5918 may be NULL at this point. */
5919 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
5921 ohdr = &elf_section_data (osec)->this_hdr;
5922 ohdr->sh_flags |= SHF_LINK_ORDER;
5923 elf_linked_to_section (osec) = elf_linked_to_section (isec);
5926 osec->use_rela_p = isec->use_rela_p;
5931 /* Copy private section information. This copies over the entsize
5932 field, and sometimes the info field. */
5935 _bfd_elf_copy_private_section_data (bfd *ibfd,
5940 Elf_Internal_Shdr *ihdr, *ohdr;
5942 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5943 || obfd->xvec->flavour != bfd_target_elf_flavour)
5946 ihdr = &elf_section_data (isec)->this_hdr;
5947 ohdr = &elf_section_data (osec)->this_hdr;
5949 ohdr->sh_entsize = ihdr->sh_entsize;
5951 if (ihdr->sh_type == SHT_SYMTAB
5952 || ihdr->sh_type == SHT_DYNSYM
5953 || ihdr->sh_type == SHT_GNU_verneed
5954 || ihdr->sh_type == SHT_GNU_verdef)
5955 ohdr->sh_info = ihdr->sh_info;
5957 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
5961 /* Copy private header information. */
5964 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
5968 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5969 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5972 /* Copy over private BFD data if it has not already been copied.
5973 This must be done here, rather than in the copy_private_bfd_data
5974 entry point, because the latter is called after the section
5975 contents have been set, which means that the program headers have
5976 already been worked out. */
5977 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5979 if (! copy_private_bfd_data (ibfd, obfd))
5983 /* _bfd_elf_copy_private_section_data copied over the SHF_GROUP flag
5984 but this might be wrong if we deleted the group section. */
5985 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
5986 if (elf_section_type (isec) == SHT_GROUP
5987 && isec->output_section == NULL)
5989 asection *first = elf_next_in_group (isec);
5990 asection *s = first;
5993 if (s->output_section != NULL)
5995 elf_section_flags (s->output_section) &= ~SHF_GROUP;
5996 elf_group_name (s->output_section) = NULL;
5998 s = elf_next_in_group (s);
6007 /* Copy private symbol information. If this symbol is in a section
6008 which we did not map into a BFD section, try to map the section
6009 index correctly. We use special macro definitions for the mapped
6010 section indices; these definitions are interpreted by the
6011 swap_out_syms function. */
6013 #define MAP_ONESYMTAB (SHN_HIOS + 1)
6014 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
6015 #define MAP_STRTAB (SHN_HIOS + 3)
6016 #define MAP_SHSTRTAB (SHN_HIOS + 4)
6017 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
6020 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
6025 elf_symbol_type *isym, *osym;
6027 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6028 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6031 isym = elf_symbol_from (ibfd, isymarg);
6032 osym = elf_symbol_from (obfd, osymarg);
6036 && bfd_is_abs_section (isym->symbol.section))
6040 shndx = isym->internal_elf_sym.st_shndx;
6041 if (shndx == elf_onesymtab (ibfd))
6042 shndx = MAP_ONESYMTAB;
6043 else if (shndx == elf_dynsymtab (ibfd))
6044 shndx = MAP_DYNSYMTAB;
6045 else if (shndx == elf_tdata (ibfd)->strtab_section)
6047 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
6048 shndx = MAP_SHSTRTAB;
6049 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
6050 shndx = MAP_SYM_SHNDX;
6051 osym->internal_elf_sym.st_shndx = shndx;
6057 /* Swap out the symbols. */
6060 swap_out_syms (bfd *abfd,
6061 struct bfd_strtab_hash **sttp,
6064 const struct elf_backend_data *bed;
6067 struct bfd_strtab_hash *stt;
6068 Elf_Internal_Shdr *symtab_hdr;
6069 Elf_Internal_Shdr *symtab_shndx_hdr;
6070 Elf_Internal_Shdr *symstrtab_hdr;
6071 bfd_byte *outbound_syms;
6072 bfd_byte *outbound_shndx;
6075 bfd_boolean name_local_sections;
6077 if (!elf_map_symbols (abfd))
6080 /* Dump out the symtabs. */
6081 stt = _bfd_elf_stringtab_init ();
6085 bed = get_elf_backend_data (abfd);
6086 symcount = bfd_get_symcount (abfd);
6087 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6088 symtab_hdr->sh_type = SHT_SYMTAB;
6089 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6090 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6091 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
6092 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
6094 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6095 symstrtab_hdr->sh_type = SHT_STRTAB;
6097 outbound_syms = bfd_alloc2 (abfd, 1 + symcount, bed->s->sizeof_sym);
6098 if (outbound_syms == NULL)
6100 _bfd_stringtab_free (stt);
6103 symtab_hdr->contents = outbound_syms;
6105 outbound_shndx = NULL;
6106 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6107 if (symtab_shndx_hdr->sh_name != 0)
6109 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6110 outbound_shndx = bfd_zalloc2 (abfd, 1 + symcount,
6111 sizeof (Elf_External_Sym_Shndx));
6112 if (outbound_shndx == NULL)
6114 _bfd_stringtab_free (stt);
6118 symtab_shndx_hdr->contents = outbound_shndx;
6119 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6120 symtab_shndx_hdr->sh_size = amt;
6121 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6122 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6125 /* Now generate the data (for "contents"). */
6127 /* Fill in zeroth symbol and swap it out. */
6128 Elf_Internal_Sym sym;
6134 sym.st_shndx = SHN_UNDEF;
6135 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6136 outbound_syms += bed->s->sizeof_sym;
6137 if (outbound_shndx != NULL)
6138 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6142 = (bed->elf_backend_name_local_section_symbols
6143 && bed->elf_backend_name_local_section_symbols (abfd));
6145 syms = bfd_get_outsymbols (abfd);
6146 for (idx = 0; idx < symcount; idx++)
6148 Elf_Internal_Sym sym;
6149 bfd_vma value = syms[idx]->value;
6150 elf_symbol_type *type_ptr;
6151 flagword flags = syms[idx]->flags;
6154 if (!name_local_sections
6155 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6157 /* Local section symbols have no name. */
6162 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6165 if (sym.st_name == (unsigned long) -1)
6167 _bfd_stringtab_free (stt);
6172 type_ptr = elf_symbol_from (abfd, syms[idx]);
6174 if ((flags & BSF_SECTION_SYM) == 0
6175 && bfd_is_com_section (syms[idx]->section))
6177 /* ELF common symbols put the alignment into the `value' field,
6178 and the size into the `size' field. This is backwards from
6179 how BFD handles it, so reverse it here. */
6180 sym.st_size = value;
6181 if (type_ptr == NULL
6182 || type_ptr->internal_elf_sym.st_value == 0)
6183 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6185 sym.st_value = type_ptr->internal_elf_sym.st_value;
6186 sym.st_shndx = _bfd_elf_section_from_bfd_section
6187 (abfd, syms[idx]->section);
6191 asection *sec = syms[idx]->section;
6194 if (sec->output_section)
6196 value += sec->output_offset;
6197 sec = sec->output_section;
6200 /* Don't add in the section vma for relocatable output. */
6201 if (! relocatable_p)
6203 sym.st_value = value;
6204 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6206 if (bfd_is_abs_section (sec)
6208 && type_ptr->internal_elf_sym.st_shndx != 0)
6210 /* This symbol is in a real ELF section which we did
6211 not create as a BFD section. Undo the mapping done
6212 by copy_private_symbol_data. */
6213 shndx = type_ptr->internal_elf_sym.st_shndx;
6217 shndx = elf_onesymtab (abfd);
6220 shndx = elf_dynsymtab (abfd);
6223 shndx = elf_tdata (abfd)->strtab_section;
6226 shndx = elf_tdata (abfd)->shstrtab_section;
6229 shndx = elf_tdata (abfd)->symtab_shndx_section;
6237 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6243 /* Writing this would be a hell of a lot easier if
6244 we had some decent documentation on bfd, and
6245 knew what to expect of the library, and what to
6246 demand of applications. For example, it
6247 appears that `objcopy' might not set the
6248 section of a symbol to be a section that is
6249 actually in the output file. */
6250 sec2 = bfd_get_section_by_name (abfd, sec->name);
6253 _bfd_error_handler (_("\
6254 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6255 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6257 bfd_set_error (bfd_error_invalid_operation);
6258 _bfd_stringtab_free (stt);
6262 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6263 BFD_ASSERT (shndx != -1);
6267 sym.st_shndx = shndx;
6270 if ((flags & BSF_THREAD_LOCAL) != 0)
6272 else if ((flags & BSF_FUNCTION) != 0)
6274 else if ((flags & BSF_OBJECT) != 0)
6276 else if ((flags & BSF_RELC) != 0)
6278 else if ((flags & BSF_SRELC) != 0)
6283 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6286 /* Processor-specific types. */
6287 if (type_ptr != NULL
6288 && bed->elf_backend_get_symbol_type)
6289 type = ((*bed->elf_backend_get_symbol_type)
6290 (&type_ptr->internal_elf_sym, type));
6292 if (flags & BSF_SECTION_SYM)
6294 if (flags & BSF_GLOBAL)
6295 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6297 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6299 else if (bfd_is_com_section (syms[idx]->section))
6300 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6301 else if (bfd_is_und_section (syms[idx]->section))
6302 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6306 else if (flags & BSF_FILE)
6307 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6310 int bind = STB_LOCAL;
6312 if (flags & BSF_LOCAL)
6314 else if (flags & BSF_WEAK)
6316 else if (flags & BSF_GLOBAL)
6319 sym.st_info = ELF_ST_INFO (bind, type);
6322 if (type_ptr != NULL)
6323 sym.st_other = type_ptr->internal_elf_sym.st_other;
6327 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6328 outbound_syms += bed->s->sizeof_sym;
6329 if (outbound_shndx != NULL)
6330 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6334 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6335 symstrtab_hdr->sh_type = SHT_STRTAB;
6337 symstrtab_hdr->sh_flags = 0;
6338 symstrtab_hdr->sh_addr = 0;
6339 symstrtab_hdr->sh_entsize = 0;
6340 symstrtab_hdr->sh_link = 0;
6341 symstrtab_hdr->sh_info = 0;
6342 symstrtab_hdr->sh_addralign = 1;
6347 /* Return the number of bytes required to hold the symtab vector.
6349 Note that we base it on the count plus 1, since we will null terminate
6350 the vector allocated based on this size. However, the ELF symbol table
6351 always has a dummy entry as symbol #0, so it ends up even. */
6354 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6358 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6360 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6361 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6363 symtab_size -= sizeof (asymbol *);
6369 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6373 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6375 if (elf_dynsymtab (abfd) == 0)
6377 bfd_set_error (bfd_error_invalid_operation);
6381 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6382 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6384 symtab_size -= sizeof (asymbol *);
6390 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6393 return (asect->reloc_count + 1) * sizeof (arelent *);
6396 /* Canonicalize the relocs. */
6399 _bfd_elf_canonicalize_reloc (bfd *abfd,
6406 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6408 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6411 tblptr = section->relocation;
6412 for (i = 0; i < section->reloc_count; i++)
6413 *relptr++ = tblptr++;
6417 return section->reloc_count;
6421 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6423 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6424 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6427 bfd_get_symcount (abfd) = symcount;
6432 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6433 asymbol **allocation)
6435 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6436 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6439 bfd_get_dynamic_symcount (abfd) = symcount;
6443 /* Return the size required for the dynamic reloc entries. Any loadable
6444 section that was actually installed in the BFD, and has type SHT_REL
6445 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6446 dynamic reloc section. */
6449 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6454 if (elf_dynsymtab (abfd) == 0)
6456 bfd_set_error (bfd_error_invalid_operation);
6460 ret = sizeof (arelent *);
6461 for (s = abfd->sections; s != NULL; s = s->next)
6462 if ((s->flags & SEC_LOAD) != 0
6463 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6464 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6465 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6466 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6467 * sizeof (arelent *));
6472 /* Canonicalize the dynamic relocation entries. Note that we return the
6473 dynamic relocations as a single block, although they are actually
6474 associated with particular sections; the interface, which was
6475 designed for SunOS style shared libraries, expects that there is only
6476 one set of dynamic relocs. Any loadable section that was actually
6477 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6478 dynamic symbol table, is considered to be a dynamic reloc section. */
6481 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6485 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6489 if (elf_dynsymtab (abfd) == 0)
6491 bfd_set_error (bfd_error_invalid_operation);
6495 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6497 for (s = abfd->sections; s != NULL; s = s->next)
6499 if ((s->flags & SEC_LOAD) != 0
6500 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6501 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6502 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6507 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6509 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6511 for (i = 0; i < count; i++)
6522 /* Read in the version information. */
6525 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6527 bfd_byte *contents = NULL;
6528 unsigned int freeidx = 0;
6530 if (elf_dynverref (abfd) != 0)
6532 Elf_Internal_Shdr *hdr;
6533 Elf_External_Verneed *everneed;
6534 Elf_Internal_Verneed *iverneed;
6536 bfd_byte *contents_end;
6538 hdr = &elf_tdata (abfd)->dynverref_hdr;
6540 elf_tdata (abfd)->verref = bfd_zalloc2 (abfd, hdr->sh_info,
6541 sizeof (Elf_Internal_Verneed));
6542 if (elf_tdata (abfd)->verref == NULL)
6545 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6547 contents = bfd_malloc (hdr->sh_size);
6548 if (contents == NULL)
6550 error_return_verref:
6551 elf_tdata (abfd)->verref = NULL;
6552 elf_tdata (abfd)->cverrefs = 0;
6555 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6556 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6557 goto error_return_verref;
6559 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6560 goto error_return_verref;
6562 BFD_ASSERT (sizeof (Elf_External_Verneed)
6563 == sizeof (Elf_External_Vernaux));
6564 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6565 everneed = (Elf_External_Verneed *) contents;
6566 iverneed = elf_tdata (abfd)->verref;
6567 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6569 Elf_External_Vernaux *evernaux;
6570 Elf_Internal_Vernaux *ivernaux;
6573 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6575 iverneed->vn_bfd = abfd;
6577 iverneed->vn_filename =
6578 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6580 if (iverneed->vn_filename == NULL)
6581 goto error_return_verref;
6583 if (iverneed->vn_cnt == 0)
6584 iverneed->vn_auxptr = NULL;
6587 iverneed->vn_auxptr = bfd_alloc2 (abfd, iverneed->vn_cnt,
6588 sizeof (Elf_Internal_Vernaux));
6589 if (iverneed->vn_auxptr == NULL)
6590 goto error_return_verref;
6593 if (iverneed->vn_aux
6594 > (size_t) (contents_end - (bfd_byte *) everneed))
6595 goto error_return_verref;
6597 evernaux = ((Elf_External_Vernaux *)
6598 ((bfd_byte *) everneed + iverneed->vn_aux));
6599 ivernaux = iverneed->vn_auxptr;
6600 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6602 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6604 ivernaux->vna_nodename =
6605 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6606 ivernaux->vna_name);
6607 if (ivernaux->vna_nodename == NULL)
6608 goto error_return_verref;
6610 if (j + 1 < iverneed->vn_cnt)
6611 ivernaux->vna_nextptr = ivernaux + 1;
6613 ivernaux->vna_nextptr = NULL;
6615 if (ivernaux->vna_next
6616 > (size_t) (contents_end - (bfd_byte *) evernaux))
6617 goto error_return_verref;
6619 evernaux = ((Elf_External_Vernaux *)
6620 ((bfd_byte *) evernaux + ivernaux->vna_next));
6622 if (ivernaux->vna_other > freeidx)
6623 freeidx = ivernaux->vna_other;
6626 if (i + 1 < hdr->sh_info)
6627 iverneed->vn_nextref = iverneed + 1;
6629 iverneed->vn_nextref = NULL;
6631 if (iverneed->vn_next
6632 > (size_t) (contents_end - (bfd_byte *) everneed))
6633 goto error_return_verref;
6635 everneed = ((Elf_External_Verneed *)
6636 ((bfd_byte *) everneed + iverneed->vn_next));
6643 if (elf_dynverdef (abfd) != 0)
6645 Elf_Internal_Shdr *hdr;
6646 Elf_External_Verdef *everdef;
6647 Elf_Internal_Verdef *iverdef;
6648 Elf_Internal_Verdef *iverdefarr;
6649 Elf_Internal_Verdef iverdefmem;
6651 unsigned int maxidx;
6652 bfd_byte *contents_end_def, *contents_end_aux;
6654 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6656 contents = bfd_malloc (hdr->sh_size);
6657 if (contents == NULL)
6659 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6660 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6663 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
6666 BFD_ASSERT (sizeof (Elf_External_Verdef)
6667 >= sizeof (Elf_External_Verdaux));
6668 contents_end_def = contents + hdr->sh_size
6669 - sizeof (Elf_External_Verdef);
6670 contents_end_aux = contents + hdr->sh_size
6671 - sizeof (Elf_External_Verdaux);
6673 /* We know the number of entries in the section but not the maximum
6674 index. Therefore we have to run through all entries and find
6676 everdef = (Elf_External_Verdef *) contents;
6678 for (i = 0; i < hdr->sh_info; ++i)
6680 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6682 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6683 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6685 if (iverdefmem.vd_next
6686 > (size_t) (contents_end_def - (bfd_byte *) everdef))
6689 everdef = ((Elf_External_Verdef *)
6690 ((bfd_byte *) everdef + iverdefmem.vd_next));
6693 if (default_imported_symver)
6695 if (freeidx > maxidx)
6700 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, maxidx,
6701 sizeof (Elf_Internal_Verdef));
6702 if (elf_tdata (abfd)->verdef == NULL)
6705 elf_tdata (abfd)->cverdefs = maxidx;
6707 everdef = (Elf_External_Verdef *) contents;
6708 iverdefarr = elf_tdata (abfd)->verdef;
6709 for (i = 0; i < hdr->sh_info; i++)
6711 Elf_External_Verdaux *everdaux;
6712 Elf_Internal_Verdaux *iverdaux;
6715 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6717 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
6719 error_return_verdef:
6720 elf_tdata (abfd)->verdef = NULL;
6721 elf_tdata (abfd)->cverdefs = 0;
6725 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6726 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6728 iverdef->vd_bfd = abfd;
6730 if (iverdef->vd_cnt == 0)
6731 iverdef->vd_auxptr = NULL;
6734 iverdef->vd_auxptr = bfd_alloc2 (abfd, iverdef->vd_cnt,
6735 sizeof (Elf_Internal_Verdaux));
6736 if (iverdef->vd_auxptr == NULL)
6737 goto error_return_verdef;
6741 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
6742 goto error_return_verdef;
6744 everdaux = ((Elf_External_Verdaux *)
6745 ((bfd_byte *) everdef + iverdef->vd_aux));
6746 iverdaux = iverdef->vd_auxptr;
6747 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6749 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6751 iverdaux->vda_nodename =
6752 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6753 iverdaux->vda_name);
6754 if (iverdaux->vda_nodename == NULL)
6755 goto error_return_verdef;
6757 if (j + 1 < iverdef->vd_cnt)
6758 iverdaux->vda_nextptr = iverdaux + 1;
6760 iverdaux->vda_nextptr = NULL;
6762 if (iverdaux->vda_next
6763 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
6764 goto error_return_verdef;
6766 everdaux = ((Elf_External_Verdaux *)
6767 ((bfd_byte *) everdaux + iverdaux->vda_next));
6770 if (iverdef->vd_cnt)
6771 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6773 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
6774 iverdef->vd_nextdef = iverdef + 1;
6776 iverdef->vd_nextdef = NULL;
6778 everdef = ((Elf_External_Verdef *)
6779 ((bfd_byte *) everdef + iverdef->vd_next));
6785 else if (default_imported_symver)
6792 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, freeidx,
6793 sizeof (Elf_Internal_Verdef));
6794 if (elf_tdata (abfd)->verdef == NULL)
6797 elf_tdata (abfd)->cverdefs = freeidx;
6800 /* Create a default version based on the soname. */
6801 if (default_imported_symver)
6803 Elf_Internal_Verdef *iverdef;
6804 Elf_Internal_Verdaux *iverdaux;
6806 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6808 iverdef->vd_version = VER_DEF_CURRENT;
6809 iverdef->vd_flags = 0;
6810 iverdef->vd_ndx = freeidx;
6811 iverdef->vd_cnt = 1;
6813 iverdef->vd_bfd = abfd;
6815 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6816 if (iverdef->vd_nodename == NULL)
6817 goto error_return_verdef;
6818 iverdef->vd_nextdef = NULL;
6819 iverdef->vd_auxptr = bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
6820 if (iverdef->vd_auxptr == NULL)
6821 goto error_return_verdef;
6823 iverdaux = iverdef->vd_auxptr;
6824 iverdaux->vda_nodename = iverdef->vd_nodename;
6825 iverdaux->vda_nextptr = NULL;
6831 if (contents != NULL)
6837 _bfd_elf_make_empty_symbol (bfd *abfd)
6839 elf_symbol_type *newsym;
6840 bfd_size_type amt = sizeof (elf_symbol_type);
6842 newsym = bfd_zalloc (abfd, amt);
6847 newsym->symbol.the_bfd = abfd;
6848 return &newsym->symbol;
6853 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
6857 bfd_symbol_info (symbol, ret);
6860 /* Return whether a symbol name implies a local symbol. Most targets
6861 use this function for the is_local_label_name entry point, but some
6865 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
6868 /* Normal local symbols start with ``.L''. */
6869 if (name[0] == '.' && name[1] == 'L')
6872 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6873 DWARF debugging symbols starting with ``..''. */
6874 if (name[0] == '.' && name[1] == '.')
6877 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6878 emitting DWARF debugging output. I suspect this is actually a
6879 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6880 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6881 underscore to be emitted on some ELF targets). For ease of use,
6882 we treat such symbols as local. */
6883 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6890 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6891 asymbol *symbol ATTRIBUTE_UNUSED)
6898 _bfd_elf_set_arch_mach (bfd *abfd,
6899 enum bfd_architecture arch,
6900 unsigned long machine)
6902 /* If this isn't the right architecture for this backend, and this
6903 isn't the generic backend, fail. */
6904 if (arch != get_elf_backend_data (abfd)->arch
6905 && arch != bfd_arch_unknown
6906 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6909 return bfd_default_set_arch_mach (abfd, arch, machine);
6912 /* Find the function to a particular section and offset,
6913 for error reporting. */
6916 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6920 const char **filename_ptr,
6921 const char **functionname_ptr)
6923 const char *filename;
6924 asymbol *func, *file;
6927 /* ??? Given multiple file symbols, it is impossible to reliably
6928 choose the right file name for global symbols. File symbols are
6929 local symbols, and thus all file symbols must sort before any
6930 global symbols. The ELF spec may be interpreted to say that a
6931 file symbol must sort before other local symbols, but currently
6932 ld -r doesn't do this. So, for ld -r output, it is possible to
6933 make a better choice of file name for local symbols by ignoring
6934 file symbols appearing after a given local symbol. */
6935 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
6941 state = nothing_seen;
6943 for (p = symbols; *p != NULL; p++)
6947 q = (elf_symbol_type *) *p;
6949 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6955 if (state == symbol_seen)
6956 state = file_after_symbol_seen;
6960 if (bfd_get_section (&q->symbol) == section
6961 && q->symbol.value >= low_func
6962 && q->symbol.value <= offset)
6964 func = (asymbol *) q;
6965 low_func = q->symbol.value;
6968 && (ELF_ST_BIND (q->internal_elf_sym.st_info) == STB_LOCAL
6969 || state != file_after_symbol_seen))
6970 filename = bfd_asymbol_name (file);
6974 if (state == nothing_seen)
6975 state = symbol_seen;
6982 *filename_ptr = filename;
6983 if (functionname_ptr)
6984 *functionname_ptr = bfd_asymbol_name (func);
6989 /* Find the nearest line to a particular section and offset,
6990 for error reporting. */
6993 _bfd_elf_find_nearest_line (bfd *abfd,
6997 const char **filename_ptr,
6998 const char **functionname_ptr,
6999 unsigned int *line_ptr)
7003 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
7004 filename_ptr, functionname_ptr,
7007 if (!*functionname_ptr)
7008 elf_find_function (abfd, section, symbols, offset,
7009 *filename_ptr ? NULL : filename_ptr,
7015 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
7016 filename_ptr, functionname_ptr,
7018 &elf_tdata (abfd)->dwarf2_find_line_info))
7020 if (!*functionname_ptr)
7021 elf_find_function (abfd, section, symbols, offset,
7022 *filename_ptr ? NULL : filename_ptr,
7028 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7029 &found, filename_ptr,
7030 functionname_ptr, line_ptr,
7031 &elf_tdata (abfd)->line_info))
7033 if (found && (*functionname_ptr || *line_ptr))
7036 if (symbols == NULL)
7039 if (! elf_find_function (abfd, section, symbols, offset,
7040 filename_ptr, functionname_ptr))
7047 /* Find the line for a symbol. */
7050 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
7051 const char **filename_ptr, unsigned int *line_ptr)
7053 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
7054 filename_ptr, line_ptr, 0,
7055 &elf_tdata (abfd)->dwarf2_find_line_info);
7058 /* After a call to bfd_find_nearest_line, successive calls to
7059 bfd_find_inliner_info can be used to get source information about
7060 each level of function inlining that terminated at the address
7061 passed to bfd_find_nearest_line. Currently this is only supported
7062 for DWARF2 with appropriate DWARF3 extensions. */
7065 _bfd_elf_find_inliner_info (bfd *abfd,
7066 const char **filename_ptr,
7067 const char **functionname_ptr,
7068 unsigned int *line_ptr)
7071 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7072 functionname_ptr, line_ptr,
7073 & elf_tdata (abfd)->dwarf2_find_line_info);
7078 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
7080 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7081 int ret = bed->s->sizeof_ehdr;
7083 if (!info->relocatable)
7085 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
7087 if (phdr_size == (bfd_size_type) -1)
7089 struct elf_segment_map *m;
7092 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
7093 phdr_size += bed->s->sizeof_phdr;
7096 phdr_size = get_program_header_size (abfd, info);
7099 elf_tdata (abfd)->program_header_size = phdr_size;
7107 _bfd_elf_set_section_contents (bfd *abfd,
7109 const void *location,
7111 bfd_size_type count)
7113 Elf_Internal_Shdr *hdr;
7116 if (! abfd->output_has_begun
7117 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7120 hdr = &elf_section_data (section)->this_hdr;
7121 pos = hdr->sh_offset + offset;
7122 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7123 || bfd_bwrite (location, count, abfd) != count)
7130 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7131 arelent *cache_ptr ATTRIBUTE_UNUSED,
7132 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7137 /* Try to convert a non-ELF reloc into an ELF one. */
7140 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7142 /* Check whether we really have an ELF howto. */
7144 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7146 bfd_reloc_code_real_type code;
7147 reloc_howto_type *howto;
7149 /* Alien reloc: Try to determine its type to replace it with an
7150 equivalent ELF reloc. */
7152 if (areloc->howto->pc_relative)
7154 switch (areloc->howto->bitsize)
7157 code = BFD_RELOC_8_PCREL;
7160 code = BFD_RELOC_12_PCREL;
7163 code = BFD_RELOC_16_PCREL;
7166 code = BFD_RELOC_24_PCREL;
7169 code = BFD_RELOC_32_PCREL;
7172 code = BFD_RELOC_64_PCREL;
7178 howto = bfd_reloc_type_lookup (abfd, code);
7180 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7182 if (howto->pcrel_offset)
7183 areloc->addend += areloc->address;
7185 areloc->addend -= areloc->address; /* addend is unsigned!! */
7190 switch (areloc->howto->bitsize)
7196 code = BFD_RELOC_14;
7199 code = BFD_RELOC_16;
7202 code = BFD_RELOC_26;
7205 code = BFD_RELOC_32;
7208 code = BFD_RELOC_64;
7214 howto = bfd_reloc_type_lookup (abfd, code);
7218 areloc->howto = howto;
7226 (*_bfd_error_handler)
7227 (_("%B: unsupported relocation type %s"),
7228 abfd, areloc->howto->name);
7229 bfd_set_error (bfd_error_bad_value);
7234 _bfd_elf_close_and_cleanup (bfd *abfd)
7236 if (bfd_get_format (abfd) == bfd_object)
7238 if (elf_tdata (abfd) != NULL && elf_shstrtab (abfd) != NULL)
7239 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7240 _bfd_dwarf2_cleanup_debug_info (abfd);
7243 return _bfd_generic_close_and_cleanup (abfd);
7246 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7247 in the relocation's offset. Thus we cannot allow any sort of sanity
7248 range-checking to interfere. There is nothing else to do in processing
7251 bfd_reloc_status_type
7252 _bfd_elf_rel_vtable_reloc_fn
7253 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7254 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7255 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7256 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7258 return bfd_reloc_ok;
7261 /* Elf core file support. Much of this only works on native
7262 toolchains, since we rely on knowing the
7263 machine-dependent procfs structure in order to pick
7264 out details about the corefile. */
7266 #ifdef HAVE_SYS_PROCFS_H
7267 # include <sys/procfs.h>
7270 /* FIXME: this is kinda wrong, but it's what gdb wants. */
7273 elfcore_make_pid (bfd *abfd)
7275 return ((elf_tdata (abfd)->core_lwpid << 16)
7276 + (elf_tdata (abfd)->core_pid));
7279 /* If there isn't a section called NAME, make one, using
7280 data from SECT. Note, this function will generate a
7281 reference to NAME, so you shouldn't deallocate or
7285 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7289 if (bfd_get_section_by_name (abfd, name) != NULL)
7292 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
7296 sect2->size = sect->size;
7297 sect2->filepos = sect->filepos;
7298 sect2->alignment_power = sect->alignment_power;
7302 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7303 actually creates up to two pseudosections:
7304 - For the single-threaded case, a section named NAME, unless
7305 such a section already exists.
7306 - For the multi-threaded case, a section named "NAME/PID", where
7307 PID is elfcore_make_pid (abfd).
7308 Both pseudosections have identical contents. */
7310 _bfd_elfcore_make_pseudosection (bfd *abfd,
7316 char *threaded_name;
7320 /* Build the section name. */
7322 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7323 len = strlen (buf) + 1;
7324 threaded_name = bfd_alloc (abfd, len);
7325 if (threaded_name == NULL)
7327 memcpy (threaded_name, buf, len);
7329 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
7334 sect->filepos = filepos;
7335 sect->alignment_power = 2;
7337 return elfcore_maybe_make_sect (abfd, name, sect);
7340 /* prstatus_t exists on:
7342 linux 2.[01] + glibc
7346 #if defined (HAVE_PRSTATUS_T)
7349 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7354 if (note->descsz == sizeof (prstatus_t))
7358 size = sizeof (prstat.pr_reg);
7359 offset = offsetof (prstatus_t, pr_reg);
7360 memcpy (&prstat, note->descdata, sizeof (prstat));
7362 /* Do not overwrite the core signal if it
7363 has already been set by another thread. */
7364 if (elf_tdata (abfd)->core_signal == 0)
7365 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7366 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7368 /* pr_who exists on:
7371 pr_who doesn't exist on:
7374 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7375 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7378 #if defined (HAVE_PRSTATUS32_T)
7379 else if (note->descsz == sizeof (prstatus32_t))
7381 /* 64-bit host, 32-bit corefile */
7382 prstatus32_t prstat;
7384 size = sizeof (prstat.pr_reg);
7385 offset = offsetof (prstatus32_t, pr_reg);
7386 memcpy (&prstat, note->descdata, sizeof (prstat));
7388 /* Do not overwrite the core signal if it
7389 has already been set by another thread. */
7390 if (elf_tdata (abfd)->core_signal == 0)
7391 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7392 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7394 /* pr_who exists on:
7397 pr_who doesn't exist on:
7400 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7401 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7404 #endif /* HAVE_PRSTATUS32_T */
7407 /* Fail - we don't know how to handle any other
7408 note size (ie. data object type). */
7412 /* Make a ".reg/999" section and a ".reg" section. */
7413 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7414 size, note->descpos + offset);
7416 #endif /* defined (HAVE_PRSTATUS_T) */
7418 /* Create a pseudosection containing the exact contents of NOTE. */
7420 elfcore_make_note_pseudosection (bfd *abfd,
7422 Elf_Internal_Note *note)
7424 return _bfd_elfcore_make_pseudosection (abfd, name,
7425 note->descsz, note->descpos);
7428 /* There isn't a consistent prfpregset_t across platforms,
7429 but it doesn't matter, because we don't have to pick this
7430 data structure apart. */
7433 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7435 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7438 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7439 type of NT_PRXFPREG. Just include the whole note's contents
7443 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7445 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7448 #if defined (HAVE_PRPSINFO_T)
7449 typedef prpsinfo_t elfcore_psinfo_t;
7450 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7451 typedef prpsinfo32_t elfcore_psinfo32_t;
7455 #if defined (HAVE_PSINFO_T)
7456 typedef psinfo_t elfcore_psinfo_t;
7457 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7458 typedef psinfo32_t elfcore_psinfo32_t;
7462 /* return a malloc'ed copy of a string at START which is at
7463 most MAX bytes long, possibly without a terminating '\0'.
7464 the copy will always have a terminating '\0'. */
7467 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7470 char *end = memchr (start, '\0', max);
7478 dups = bfd_alloc (abfd, len + 1);
7482 memcpy (dups, start, len);
7488 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7490 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7492 if (note->descsz == sizeof (elfcore_psinfo_t))
7494 elfcore_psinfo_t psinfo;
7496 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7498 elf_tdata (abfd)->core_program
7499 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7500 sizeof (psinfo.pr_fname));
7502 elf_tdata (abfd)->core_command
7503 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7504 sizeof (psinfo.pr_psargs));
7506 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7507 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7509 /* 64-bit host, 32-bit corefile */
7510 elfcore_psinfo32_t psinfo;
7512 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7514 elf_tdata (abfd)->core_program
7515 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7516 sizeof (psinfo.pr_fname));
7518 elf_tdata (abfd)->core_command
7519 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7520 sizeof (psinfo.pr_psargs));
7526 /* Fail - we don't know how to handle any other
7527 note size (ie. data object type). */
7531 /* Note that for some reason, a spurious space is tacked
7532 onto the end of the args in some (at least one anyway)
7533 implementations, so strip it off if it exists. */
7536 char *command = elf_tdata (abfd)->core_command;
7537 int n = strlen (command);
7539 if (0 < n && command[n - 1] == ' ')
7540 command[n - 1] = '\0';
7545 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7547 #if defined (HAVE_PSTATUS_T)
7549 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7551 if (note->descsz == sizeof (pstatus_t)
7552 #if defined (HAVE_PXSTATUS_T)
7553 || note->descsz == sizeof (pxstatus_t)
7559 memcpy (&pstat, note->descdata, sizeof (pstat));
7561 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7563 #if defined (HAVE_PSTATUS32_T)
7564 else if (note->descsz == sizeof (pstatus32_t))
7566 /* 64-bit host, 32-bit corefile */
7569 memcpy (&pstat, note->descdata, sizeof (pstat));
7571 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7574 /* Could grab some more details from the "representative"
7575 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7576 NT_LWPSTATUS note, presumably. */
7580 #endif /* defined (HAVE_PSTATUS_T) */
7582 #if defined (HAVE_LWPSTATUS_T)
7584 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7586 lwpstatus_t lwpstat;
7592 if (note->descsz != sizeof (lwpstat)
7593 #if defined (HAVE_LWPXSTATUS_T)
7594 && note->descsz != sizeof (lwpxstatus_t)
7599 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7601 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7602 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7604 /* Make a ".reg/999" section. */
7606 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7607 len = strlen (buf) + 1;
7608 name = bfd_alloc (abfd, len);
7611 memcpy (name, buf, len);
7613 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7617 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7618 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7619 sect->filepos = note->descpos
7620 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7623 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7624 sect->size = sizeof (lwpstat.pr_reg);
7625 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7628 sect->alignment_power = 2;
7630 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7633 /* Make a ".reg2/999" section */
7635 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7636 len = strlen (buf) + 1;
7637 name = bfd_alloc (abfd, len);
7640 memcpy (name, buf, len);
7642 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7646 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7647 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7648 sect->filepos = note->descpos
7649 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7652 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7653 sect->size = sizeof (lwpstat.pr_fpreg);
7654 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7657 sect->alignment_power = 2;
7659 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7661 #endif /* defined (HAVE_LWPSTATUS_T) */
7664 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7671 int is_active_thread;
7674 if (note->descsz < 728)
7677 if (! CONST_STRNEQ (note->namedata, "win32"))
7680 type = bfd_get_32 (abfd, note->descdata);
7684 case 1 /* NOTE_INFO_PROCESS */:
7685 /* FIXME: need to add ->core_command. */
7686 /* process_info.pid */
7687 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 8);
7688 /* process_info.signal */
7689 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 12);
7692 case 2 /* NOTE_INFO_THREAD */:
7693 /* Make a ".reg/999" section. */
7694 /* thread_info.tid */
7695 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
7697 len = strlen (buf) + 1;
7698 name = bfd_alloc (abfd, len);
7702 memcpy (name, buf, len);
7704 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7708 /* sizeof (thread_info.thread_context) */
7710 /* offsetof (thread_info.thread_context) */
7711 sect->filepos = note->descpos + 12;
7712 sect->alignment_power = 2;
7714 /* thread_info.is_active_thread */
7715 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
7717 if (is_active_thread)
7718 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7722 case 3 /* NOTE_INFO_MODULE */:
7723 /* Make a ".module/xxxxxxxx" section. */
7724 /* module_info.base_address */
7725 base_addr = bfd_get_32 (abfd, note->descdata + 4);
7726 sprintf (buf, ".module/%08lx", (long) base_addr);
7728 len = strlen (buf) + 1;
7729 name = bfd_alloc (abfd, len);
7733 memcpy (name, buf, len);
7735 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7740 sect->size = note->descsz;
7741 sect->filepos = note->descpos;
7742 sect->alignment_power = 2;
7753 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7755 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7763 if (bed->elf_backend_grok_prstatus)
7764 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7766 #if defined (HAVE_PRSTATUS_T)
7767 return elfcore_grok_prstatus (abfd, note);
7772 #if defined (HAVE_PSTATUS_T)
7774 return elfcore_grok_pstatus (abfd, note);
7777 #if defined (HAVE_LWPSTATUS_T)
7779 return elfcore_grok_lwpstatus (abfd, note);
7782 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7783 return elfcore_grok_prfpreg (abfd, note);
7785 case NT_WIN32PSTATUS:
7786 return elfcore_grok_win32pstatus (abfd, note);
7788 case NT_PRXFPREG: /* Linux SSE extension */
7789 if (note->namesz == 6
7790 && strcmp (note->namedata, "LINUX") == 0)
7791 return elfcore_grok_prxfpreg (abfd, note);
7797 if (bed->elf_backend_grok_psinfo)
7798 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7800 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7801 return elfcore_grok_psinfo (abfd, note);
7808 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
7813 sect->size = note->descsz;
7814 sect->filepos = note->descpos;
7815 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7823 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
7825 elf_tdata (abfd)->build_id_size = note->descsz;
7826 elf_tdata (abfd)->build_id = bfd_alloc (abfd, note->descsz);
7827 if (elf_tdata (abfd)->build_id == NULL)
7830 memcpy (elf_tdata (abfd)->build_id, note->descdata, note->descsz);
7836 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
7843 case NT_GNU_BUILD_ID:
7844 return elfobj_grok_gnu_build_id (abfd, note);
7849 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
7853 cp = strchr (note->namedata, '@');
7856 *lwpidp = atoi(cp + 1);
7863 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
7865 /* Signal number at offset 0x08. */
7866 elf_tdata (abfd)->core_signal
7867 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7869 /* Process ID at offset 0x50. */
7870 elf_tdata (abfd)->core_pid
7871 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7873 /* Command name at 0x7c (max 32 bytes, including nul). */
7874 elf_tdata (abfd)->core_command
7875 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
7877 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
7882 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
7886 if (elfcore_netbsd_get_lwpid (note, &lwp))
7887 elf_tdata (abfd)->core_lwpid = lwp;
7889 if (note->type == NT_NETBSDCORE_PROCINFO)
7891 /* NetBSD-specific core "procinfo". Note that we expect to
7892 find this note before any of the others, which is fine,
7893 since the kernel writes this note out first when it
7894 creates a core file. */
7896 return elfcore_grok_netbsd_procinfo (abfd, note);
7899 /* As of Jan 2002 there are no other machine-independent notes
7900 defined for NetBSD core files. If the note type is less
7901 than the start of the machine-dependent note types, we don't
7904 if (note->type < NT_NETBSDCORE_FIRSTMACH)
7908 switch (bfd_get_arch (abfd))
7910 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7911 PT_GETFPREGS == mach+2. */
7913 case bfd_arch_alpha:
7914 case bfd_arch_sparc:
7917 case NT_NETBSDCORE_FIRSTMACH+0:
7918 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7920 case NT_NETBSDCORE_FIRSTMACH+2:
7921 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7927 /* On all other arch's, PT_GETREGS == mach+1 and
7928 PT_GETFPREGS == mach+3. */
7933 case NT_NETBSDCORE_FIRSTMACH+1:
7934 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7936 case NT_NETBSDCORE_FIRSTMACH+3:
7937 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7947 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
7949 void *ddata = note->descdata;
7956 /* nto_procfs_status 'pid' field is at offset 0. */
7957 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
7959 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7960 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
7962 /* nto_procfs_status 'flags' field is at offset 8. */
7963 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
7965 /* nto_procfs_status 'what' field is at offset 14. */
7966 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
7968 elf_tdata (abfd)->core_signal = sig;
7969 elf_tdata (abfd)->core_lwpid = *tid;
7972 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7973 do not come from signals so we make sure we set the current
7974 thread just in case. */
7975 if (flags & 0x00000080)
7976 elf_tdata (abfd)->core_lwpid = *tid;
7978 /* Make a ".qnx_core_status/%d" section. */
7979 sprintf (buf, ".qnx_core_status/%ld", *tid);
7981 name = bfd_alloc (abfd, strlen (buf) + 1);
7986 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7990 sect->size = note->descsz;
7991 sect->filepos = note->descpos;
7992 sect->alignment_power = 2;
7994 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7998 elfcore_grok_nto_regs (bfd *abfd,
7999 Elf_Internal_Note *note,
8007 /* Make a "(base)/%d" section. */
8008 sprintf (buf, "%s/%ld", base, tid);
8010 name = bfd_alloc (abfd, strlen (buf) + 1);
8015 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8019 sect->size = note->descsz;
8020 sect->filepos = note->descpos;
8021 sect->alignment_power = 2;
8023 /* This is the current thread. */
8024 if (elf_tdata (abfd)->core_lwpid == tid)
8025 return elfcore_maybe_make_sect (abfd, base, sect);
8030 #define BFD_QNT_CORE_INFO 7
8031 #define BFD_QNT_CORE_STATUS 8
8032 #define BFD_QNT_CORE_GREG 9
8033 #define BFD_QNT_CORE_FPREG 10
8036 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
8038 /* Every GREG section has a STATUS section before it. Store the
8039 tid from the previous call to pass down to the next gregs
8041 static long tid = 1;
8045 case BFD_QNT_CORE_INFO:
8046 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
8047 case BFD_QNT_CORE_STATUS:
8048 return elfcore_grok_nto_status (abfd, note, &tid);
8049 case BFD_QNT_CORE_GREG:
8050 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
8051 case BFD_QNT_CORE_FPREG:
8052 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
8059 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
8065 /* Use note name as section name. */
8067 name = bfd_alloc (abfd, len);
8070 memcpy (name, note->namedata, len);
8071 name[len - 1] = '\0';
8073 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8077 sect->size = note->descsz;
8078 sect->filepos = note->descpos;
8079 sect->alignment_power = 1;
8084 /* Function: elfcore_write_note
8087 buffer to hold note, and current size of buffer
8091 size of data for note
8093 Writes note to end of buffer. ELF64 notes are written exactly as
8094 for ELF32, despite the current (as of 2006) ELF gabi specifying
8095 that they ought to have 8-byte namesz and descsz field, and have
8096 8-byte alignment. Other writers, eg. Linux kernel, do the same.
8099 Pointer to realloc'd buffer, *BUFSIZ updated. */
8102 elfcore_write_note (bfd *abfd,
8110 Elf_External_Note *xnp;
8117 namesz = strlen (name) + 1;
8119 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
8121 buf = realloc (buf, *bufsiz + newspace);
8124 dest = buf + *bufsiz;
8125 *bufsiz += newspace;
8126 xnp = (Elf_External_Note *) dest;
8127 H_PUT_32 (abfd, namesz, xnp->namesz);
8128 H_PUT_32 (abfd, size, xnp->descsz);
8129 H_PUT_32 (abfd, type, xnp->type);
8133 memcpy (dest, name, namesz);
8141 memcpy (dest, input, size);
8151 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8153 elfcore_write_prpsinfo (bfd *abfd,
8159 const char *note_name = "CORE";
8160 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8162 if (bed->elf_backend_write_core_note != NULL)
8165 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8166 NT_PRPSINFO, fname, psargs);
8171 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8172 if (bed->s->elfclass == ELFCLASS32)
8174 #if defined (HAVE_PSINFO32_T)
8176 int note_type = NT_PSINFO;
8179 int note_type = NT_PRPSINFO;
8182 memset (&data, 0, sizeof (data));
8183 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8184 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8185 return elfcore_write_note (abfd, buf, bufsiz,
8186 note_name, note_type, &data, sizeof (data));
8191 #if defined (HAVE_PSINFO_T)
8193 int note_type = NT_PSINFO;
8196 int note_type = NT_PRPSINFO;
8199 memset (&data, 0, sizeof (data));
8200 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8201 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8202 return elfcore_write_note (abfd, buf, bufsiz,
8203 note_name, note_type, &data, sizeof (data));
8206 #endif /* PSINFO_T or PRPSINFO_T */
8208 #if defined (HAVE_PRSTATUS_T)
8210 elfcore_write_prstatus (bfd *abfd,
8217 const char *note_name = "CORE";
8218 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8220 if (bed->elf_backend_write_core_note != NULL)
8223 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8225 pid, cursig, gregs);
8230 #if defined (HAVE_PRSTATUS32_T)
8231 if (bed->s->elfclass == ELFCLASS32)
8233 prstatus32_t prstat;
8235 memset (&prstat, 0, sizeof (prstat));
8236 prstat.pr_pid = pid;
8237 prstat.pr_cursig = cursig;
8238 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8239 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8240 NT_PRSTATUS, &prstat, sizeof (prstat));
8247 memset (&prstat, 0, sizeof (prstat));
8248 prstat.pr_pid = pid;
8249 prstat.pr_cursig = cursig;
8250 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8251 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8252 NT_PRSTATUS, &prstat, sizeof (prstat));
8255 #endif /* HAVE_PRSTATUS_T */
8257 #if defined (HAVE_LWPSTATUS_T)
8259 elfcore_write_lwpstatus (bfd *abfd,
8266 lwpstatus_t lwpstat;
8267 const char *note_name = "CORE";
8269 memset (&lwpstat, 0, sizeof (lwpstat));
8270 lwpstat.pr_lwpid = pid >> 16;
8271 lwpstat.pr_cursig = cursig;
8272 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8273 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
8274 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8276 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
8277 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
8279 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
8280 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
8283 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8284 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
8286 #endif /* HAVE_LWPSTATUS_T */
8288 #if defined (HAVE_PSTATUS_T)
8290 elfcore_write_pstatus (bfd *abfd,
8294 int cursig ATTRIBUTE_UNUSED,
8295 const void *gregs ATTRIBUTE_UNUSED)
8297 const char *note_name = "CORE";
8298 #if defined (HAVE_PSTATUS32_T)
8299 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8301 if (bed->s->elfclass == ELFCLASS32)
8305 memset (&pstat, 0, sizeof (pstat));
8306 pstat.pr_pid = pid & 0xffff;
8307 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8308 NT_PSTATUS, &pstat, sizeof (pstat));
8316 memset (&pstat, 0, sizeof (pstat));
8317 pstat.pr_pid = pid & 0xffff;
8318 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8319 NT_PSTATUS, &pstat, sizeof (pstat));
8323 #endif /* HAVE_PSTATUS_T */
8326 elfcore_write_prfpreg (bfd *abfd,
8332 const char *note_name = "CORE";
8333 return elfcore_write_note (abfd, buf, bufsiz,
8334 note_name, NT_FPREGSET, fpregs, size);
8338 elfcore_write_prxfpreg (bfd *abfd,
8341 const void *xfpregs,
8344 char *note_name = "LINUX";
8345 return elfcore_write_note (abfd, buf, bufsiz,
8346 note_name, NT_PRXFPREG, xfpregs, size);
8350 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
8355 while (p < buf + size)
8357 /* FIXME: bad alignment assumption. */
8358 Elf_External_Note *xnp = (Elf_External_Note *) p;
8359 Elf_Internal_Note in;
8361 in.type = H_GET_32 (abfd, xnp->type);
8363 in.namesz = H_GET_32 (abfd, xnp->namesz);
8364 in.namedata = xnp->name;
8366 in.descsz = H_GET_32 (abfd, xnp->descsz);
8367 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
8368 in.descpos = offset + (in.descdata - buf);
8370 switch (bfd_get_format (abfd))
8376 if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
8378 if (! elfcore_grok_netbsd_note (abfd, &in))
8381 else if (CONST_STRNEQ (in.namedata, "QNX"))
8383 if (! elfcore_grok_nto_note (abfd, &in))
8386 else if (CONST_STRNEQ (in.namedata, "SPU/"))
8388 if (! elfcore_grok_spu_note (abfd, &in))
8393 if (! elfcore_grok_note (abfd, &in))
8399 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
8401 if (! elfobj_grok_gnu_note (abfd, &in))
8407 p = in.descdata + BFD_ALIGN (in.descsz, 4);
8414 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
8421 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
8424 buf = bfd_malloc (size);
8428 if (bfd_bread (buf, size, abfd) != size
8429 || !elf_parse_notes (abfd, buf, size, offset))
8439 /* Providing external access to the ELF program header table. */
8441 /* Return an upper bound on the number of bytes required to store a
8442 copy of ABFD's program header table entries. Return -1 if an error
8443 occurs; bfd_get_error will return an appropriate code. */
8446 bfd_get_elf_phdr_upper_bound (bfd *abfd)
8448 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8450 bfd_set_error (bfd_error_wrong_format);
8454 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
8457 /* Copy ABFD's program header table entries to *PHDRS. The entries
8458 will be stored as an array of Elf_Internal_Phdr structures, as
8459 defined in include/elf/internal.h. To find out how large the
8460 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8462 Return the number of program header table entries read, or -1 if an
8463 error occurs; bfd_get_error will return an appropriate code. */
8466 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
8470 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8472 bfd_set_error (bfd_error_wrong_format);
8476 num_phdrs = elf_elfheader (abfd)->e_phnum;
8477 memcpy (phdrs, elf_tdata (abfd)->phdr,
8478 num_phdrs * sizeof (Elf_Internal_Phdr));
8483 enum elf_reloc_type_class
8484 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
8486 return reloc_class_normal;
8489 /* For RELA architectures, return the relocation value for a
8490 relocation against a local symbol. */
8493 _bfd_elf_rela_local_sym (bfd *abfd,
8494 Elf_Internal_Sym *sym,
8496 Elf_Internal_Rela *rel)
8498 asection *sec = *psec;
8501 relocation = (sec->output_section->vma
8502 + sec->output_offset
8504 if ((sec->flags & SEC_MERGE)
8505 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
8506 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
8509 _bfd_merged_section_offset (abfd, psec,
8510 elf_section_data (sec)->sec_info,
8511 sym->st_value + rel->r_addend);
8514 /* If we have changed the section, and our original section is
8515 marked with SEC_EXCLUDE, it means that the original
8516 SEC_MERGE section has been completely subsumed in some
8517 other SEC_MERGE section. In this case, we need to leave
8518 some info around for --emit-relocs. */
8519 if ((sec->flags & SEC_EXCLUDE) != 0)
8520 sec->kept_section = *psec;
8523 rel->r_addend -= relocation;
8524 rel->r_addend += sec->output_section->vma + sec->output_offset;
8530 _bfd_elf_rel_local_sym (bfd *abfd,
8531 Elf_Internal_Sym *sym,
8535 asection *sec = *psec;
8537 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
8538 return sym->st_value + addend;
8540 return _bfd_merged_section_offset (abfd, psec,
8541 elf_section_data (sec)->sec_info,
8542 sym->st_value + addend);
8546 _bfd_elf_section_offset (bfd *abfd,
8547 struct bfd_link_info *info,
8551 switch (sec->sec_info_type)
8553 case ELF_INFO_TYPE_STABS:
8554 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
8556 case ELF_INFO_TYPE_EH_FRAME:
8557 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
8563 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8564 reconstruct an ELF file by reading the segments out of remote memory
8565 based on the ELF file header at EHDR_VMA and the ELF program headers it
8566 points to. If not null, *LOADBASEP is filled in with the difference
8567 between the VMAs from which the segments were read, and the VMAs the
8568 file headers (and hence BFD's idea of each section's VMA) put them at.
8570 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8571 remote memory at target address VMA into the local buffer at MYADDR; it
8572 should return zero on success or an `errno' code on failure. TEMPL must
8573 be a BFD for an ELF target with the word size and byte order found in
8574 the remote memory. */
8577 bfd_elf_bfd_from_remote_memory
8581 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
8583 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
8584 (templ, ehdr_vma, loadbasep, target_read_memory);
8588 _bfd_elf_get_synthetic_symtab (bfd *abfd,
8589 long symcount ATTRIBUTE_UNUSED,
8590 asymbol **syms ATTRIBUTE_UNUSED,
8595 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8598 const char *relplt_name;
8599 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8603 Elf_Internal_Shdr *hdr;
8609 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
8612 if (dynsymcount <= 0)
8615 if (!bed->plt_sym_val)
8618 relplt_name = bed->relplt_name;
8619 if (relplt_name == NULL)
8620 relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
8621 relplt = bfd_get_section_by_name (abfd, relplt_name);
8625 hdr = &elf_section_data (relplt)->this_hdr;
8626 if (hdr->sh_link != elf_dynsymtab (abfd)
8627 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
8630 plt = bfd_get_section_by_name (abfd, ".plt");
8634 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8635 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
8638 count = relplt->size / hdr->sh_entsize;
8639 size = count * sizeof (asymbol);
8640 p = relplt->relocation;
8641 for (i = 0; i < count; i++, p++)
8642 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
8644 s = *ret = bfd_malloc (size);
8648 names = (char *) (s + count);
8649 p = relplt->relocation;
8651 for (i = 0; i < count; i++, s++, p++)
8656 addr = bed->plt_sym_val (i, plt, p);
8657 if (addr == (bfd_vma) -1)
8660 *s = **p->sym_ptr_ptr;
8661 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8662 we are defining a symbol, ensure one of them is set. */
8663 if ((s->flags & BSF_LOCAL) == 0)
8664 s->flags |= BSF_GLOBAL;
8666 s->value = addr - plt->vma;
8668 len = strlen ((*p->sym_ptr_ptr)->name);
8669 memcpy (names, (*p->sym_ptr_ptr)->name, len);
8671 memcpy (names, "@plt", sizeof ("@plt"));
8672 names += sizeof ("@plt");
8679 /* It is only used by x86-64 so far. */
8680 asection _bfd_elf_large_com_section
8681 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
8682 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
8685 _bfd_elf_set_osabi (bfd * abfd,
8686 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
8688 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
8690 i_ehdrp = elf_elfheader (abfd);
8692 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
8696 /* Return TRUE for ELF symbol types that represent functions.
8697 This is the default version of this function, which is sufficient for
8698 most targets. It returns true if TYPE is STT_FUNC. */
8701 _bfd_elf_is_function_type (unsigned int type)
8703 return (type == STT_FUNC);