1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
28 BFD support for ELF formats is being worked on.
29 Currently, the best supported back ends are for sparc and i386
30 (running svr4 or Solaris 2).
32 Documentation of the internals of the support code still needs
33 to be written. The code is changing quickly enough that we
34 haven't bothered yet. */
36 /* For sparc64-cross-sparc32. */
44 #include "libiberty.h"
45 #include "safe-ctype.h"
47 static int elf_sort_sections (const void *, const void *);
48 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
49 static bfd_boolean prep_headers (bfd *);
50 static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
51 static bfd_boolean elf_read_notes (bfd *, file_ptr, bfd_size_type) ;
52 static bfd_boolean elf_parse_notes (bfd *abfd, char *buf, size_t size,
55 /* Swap version information in and out. The version information is
56 currently size independent. If that ever changes, this code will
57 need to move into elfcode.h. */
59 /* Swap in a Verdef structure. */
62 _bfd_elf_swap_verdef_in (bfd *abfd,
63 const Elf_External_Verdef *src,
64 Elf_Internal_Verdef *dst)
66 dst->vd_version = H_GET_16 (abfd, src->vd_version);
67 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
68 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
69 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
70 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
71 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
72 dst->vd_next = H_GET_32 (abfd, src->vd_next);
75 /* Swap out a Verdef structure. */
78 _bfd_elf_swap_verdef_out (bfd *abfd,
79 const Elf_Internal_Verdef *src,
80 Elf_External_Verdef *dst)
82 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
83 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
84 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
85 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
86 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
87 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
88 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
91 /* Swap in a Verdaux structure. */
94 _bfd_elf_swap_verdaux_in (bfd *abfd,
95 const Elf_External_Verdaux *src,
96 Elf_Internal_Verdaux *dst)
98 dst->vda_name = H_GET_32 (abfd, src->vda_name);
99 dst->vda_next = H_GET_32 (abfd, src->vda_next);
102 /* Swap out a Verdaux structure. */
105 _bfd_elf_swap_verdaux_out (bfd *abfd,
106 const Elf_Internal_Verdaux *src,
107 Elf_External_Verdaux *dst)
109 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
110 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
113 /* Swap in a Verneed structure. */
116 _bfd_elf_swap_verneed_in (bfd *abfd,
117 const Elf_External_Verneed *src,
118 Elf_Internal_Verneed *dst)
120 dst->vn_version = H_GET_16 (abfd, src->vn_version);
121 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
122 dst->vn_file = H_GET_32 (abfd, src->vn_file);
123 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
124 dst->vn_next = H_GET_32 (abfd, src->vn_next);
127 /* Swap out a Verneed structure. */
130 _bfd_elf_swap_verneed_out (bfd *abfd,
131 const Elf_Internal_Verneed *src,
132 Elf_External_Verneed *dst)
134 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
135 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
136 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
137 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
138 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
141 /* Swap in a Vernaux structure. */
144 _bfd_elf_swap_vernaux_in (bfd *abfd,
145 const Elf_External_Vernaux *src,
146 Elf_Internal_Vernaux *dst)
148 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
149 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
150 dst->vna_other = H_GET_16 (abfd, src->vna_other);
151 dst->vna_name = H_GET_32 (abfd, src->vna_name);
152 dst->vna_next = H_GET_32 (abfd, src->vna_next);
155 /* Swap out a Vernaux structure. */
158 _bfd_elf_swap_vernaux_out (bfd *abfd,
159 const Elf_Internal_Vernaux *src,
160 Elf_External_Vernaux *dst)
162 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
163 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
164 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
165 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
166 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
169 /* Swap in a Versym structure. */
172 _bfd_elf_swap_versym_in (bfd *abfd,
173 const Elf_External_Versym *src,
174 Elf_Internal_Versym *dst)
176 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
179 /* Swap out a Versym structure. */
182 _bfd_elf_swap_versym_out (bfd *abfd,
183 const Elf_Internal_Versym *src,
184 Elf_External_Versym *dst)
186 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
189 /* Standard ELF hash function. Do not change this function; you will
190 cause invalid hash tables to be generated. */
193 bfd_elf_hash (const char *namearg)
195 const unsigned char *name = (const unsigned char *) namearg;
200 while ((ch = *name++) != '\0')
203 if ((g = (h & 0xf0000000)) != 0)
206 /* The ELF ABI says `h &= ~g', but this is equivalent in
207 this case and on some machines one insn instead of two. */
211 return h & 0xffffffff;
214 /* DT_GNU_HASH hash function. Do not change this function; you will
215 cause invalid hash tables to be generated. */
218 bfd_elf_gnu_hash (const char *namearg)
220 const unsigned char *name = (const unsigned char *) namearg;
221 unsigned long h = 5381;
224 while ((ch = *name++) != '\0')
225 h = (h << 5) + h + ch;
226 return h & 0xffffffff;
230 bfd_elf_mkobject (bfd *abfd)
232 if (abfd->tdata.any == NULL)
234 abfd->tdata.any = bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
235 if (abfd->tdata.any == NULL)
239 elf_tdata (abfd)->program_header_size = (bfd_size_type) -1;
245 bfd_elf_mkcorefile (bfd *abfd)
247 /* I think this can be done just like an object file. */
248 return bfd_elf_mkobject (abfd);
252 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
254 Elf_Internal_Shdr **i_shdrp;
255 bfd_byte *shstrtab = NULL;
257 bfd_size_type shstrtabsize;
259 i_shdrp = elf_elfsections (abfd);
261 || shindex >= elf_numsections (abfd)
262 || i_shdrp[shindex] == 0)
265 shstrtab = i_shdrp[shindex]->contents;
266 if (shstrtab == NULL)
268 /* No cached one, attempt to read, and cache what we read. */
269 offset = i_shdrp[shindex]->sh_offset;
270 shstrtabsize = i_shdrp[shindex]->sh_size;
272 /* Allocate and clear an extra byte at the end, to prevent crashes
273 in case the string table is not terminated. */
274 if (shstrtabsize + 1 == 0
275 || (shstrtab = bfd_alloc (abfd, shstrtabsize + 1)) == NULL
276 || bfd_seek (abfd, offset, SEEK_SET) != 0)
278 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
280 if (bfd_get_error () != bfd_error_system_call)
281 bfd_set_error (bfd_error_file_truncated);
285 shstrtab[shstrtabsize] = '\0';
286 i_shdrp[shindex]->contents = shstrtab;
288 return (char *) shstrtab;
292 bfd_elf_string_from_elf_section (bfd *abfd,
293 unsigned int shindex,
294 unsigned int strindex)
296 Elf_Internal_Shdr *hdr;
301 if (elf_elfsections (abfd) == NULL || shindex >= elf_numsections (abfd))
304 hdr = elf_elfsections (abfd)[shindex];
306 if (hdr->contents == NULL
307 && bfd_elf_get_str_section (abfd, shindex) == NULL)
310 if (strindex >= hdr->sh_size)
312 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
313 (*_bfd_error_handler)
314 (_("%B: invalid string offset %u >= %lu for section `%s'"),
315 abfd, strindex, (unsigned long) hdr->sh_size,
316 (shindex == shstrndx && strindex == hdr->sh_name
318 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
322 return ((char *) hdr->contents) + strindex;
325 /* Read and convert symbols to internal format.
326 SYMCOUNT specifies the number of symbols to read, starting from
327 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
328 are non-NULL, they are used to store the internal symbols, external
329 symbols, and symbol section index extensions, respectively. */
332 bfd_elf_get_elf_syms (bfd *ibfd,
333 Elf_Internal_Shdr *symtab_hdr,
336 Elf_Internal_Sym *intsym_buf,
338 Elf_External_Sym_Shndx *extshndx_buf)
340 Elf_Internal_Shdr *shndx_hdr;
342 const bfd_byte *esym;
343 Elf_External_Sym_Shndx *alloc_extshndx;
344 Elf_External_Sym_Shndx *shndx;
345 Elf_Internal_Sym *isym;
346 Elf_Internal_Sym *isymend;
347 const struct elf_backend_data *bed;
355 /* Normal syms might have section extension entries. */
357 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
358 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
360 /* Read the symbols. */
362 alloc_extshndx = NULL;
363 bed = get_elf_backend_data (ibfd);
364 extsym_size = bed->s->sizeof_sym;
365 amt = symcount * extsym_size;
366 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
367 if (extsym_buf == NULL)
369 alloc_ext = bfd_malloc2 (symcount, extsym_size);
370 extsym_buf = alloc_ext;
372 if (extsym_buf == NULL
373 || bfd_seek (ibfd, pos, SEEK_SET) != 0
374 || bfd_bread (extsym_buf, amt, ibfd) != amt)
380 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
384 amt = symcount * sizeof (Elf_External_Sym_Shndx);
385 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
386 if (extshndx_buf == NULL)
388 alloc_extshndx = bfd_malloc2 (symcount,
389 sizeof (Elf_External_Sym_Shndx));
390 extshndx_buf = alloc_extshndx;
392 if (extshndx_buf == NULL
393 || bfd_seek (ibfd, pos, SEEK_SET) != 0
394 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
401 if (intsym_buf == NULL)
403 intsym_buf = bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
404 if (intsym_buf == NULL)
408 /* Convert the symbols to internal form. */
409 isymend = intsym_buf + symcount;
410 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
412 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
413 if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym))
415 symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size;
416 (*_bfd_error_handler) (_("%B symbol number %lu references "
417 "nonexistent SHT_SYMTAB_SHNDX section"),
418 ibfd, (unsigned long) symoffset);
424 if (alloc_ext != NULL)
426 if (alloc_extshndx != NULL)
427 free (alloc_extshndx);
432 /* Look up a symbol name. */
434 bfd_elf_sym_name (bfd *abfd,
435 Elf_Internal_Shdr *symtab_hdr,
436 Elf_Internal_Sym *isym,
440 unsigned int iname = isym->st_name;
441 unsigned int shindex = symtab_hdr->sh_link;
443 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
444 /* Check for a bogus st_shndx to avoid crashing. */
445 && isym->st_shndx < elf_numsections (abfd)
446 && !(isym->st_shndx >= SHN_LORESERVE && isym->st_shndx <= SHN_HIRESERVE))
448 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
449 shindex = elf_elfheader (abfd)->e_shstrndx;
452 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
455 else if (sym_sec && *name == '\0')
456 name = bfd_section_name (abfd, sym_sec);
461 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
462 sections. The first element is the flags, the rest are section
465 typedef union elf_internal_group {
466 Elf_Internal_Shdr *shdr;
468 } Elf_Internal_Group;
470 /* Return the name of the group signature symbol. Why isn't the
471 signature just a string? */
474 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
476 Elf_Internal_Shdr *hdr;
477 unsigned char esym[sizeof (Elf64_External_Sym)];
478 Elf_External_Sym_Shndx eshndx;
479 Elf_Internal_Sym isym;
481 /* First we need to ensure the symbol table is available. Make sure
482 that it is a symbol table section. */
483 hdr = elf_elfsections (abfd) [ghdr->sh_link];
484 if (hdr->sh_type != SHT_SYMTAB
485 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
488 /* Go read the symbol. */
489 hdr = &elf_tdata (abfd)->symtab_hdr;
490 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
491 &isym, esym, &eshndx) == NULL)
494 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
497 /* Set next_in_group list pointer, and group name for NEWSECT. */
500 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
502 unsigned int num_group = elf_tdata (abfd)->num_group;
504 /* If num_group is zero, read in all SHT_GROUP sections. The count
505 is set to -1 if there are no SHT_GROUP sections. */
508 unsigned int i, shnum;
510 /* First count the number of groups. If we have a SHT_GROUP
511 section with just a flag word (ie. sh_size is 4), ignore it. */
512 shnum = elf_numsections (abfd);
515 #define IS_VALID_GROUP_SECTION_HEADER(shdr) \
516 ( (shdr)->sh_type == SHT_GROUP \
517 && (shdr)->sh_size >= (2 * GRP_ENTRY_SIZE) \
518 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
519 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
521 for (i = 0; i < shnum; i++)
523 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
525 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
531 num_group = (unsigned) -1;
532 elf_tdata (abfd)->num_group = num_group;
536 /* We keep a list of elf section headers for group sections,
537 so we can find them quickly. */
540 elf_tdata (abfd)->num_group = num_group;
541 elf_tdata (abfd)->group_sect_ptr
542 = bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
543 if (elf_tdata (abfd)->group_sect_ptr == NULL)
547 for (i = 0; i < shnum; i++)
549 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
551 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
554 Elf_Internal_Group *dest;
556 /* Add to list of sections. */
557 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
560 /* Read the raw contents. */
561 BFD_ASSERT (sizeof (*dest) >= 4);
562 amt = shdr->sh_size * sizeof (*dest) / 4;
563 shdr->contents = bfd_alloc2 (abfd, shdr->sh_size,
565 /* PR binutils/4110: Handle corrupt group headers. */
566 if (shdr->contents == NULL)
569 (_("%B: Corrupt size field in group section header: 0x%lx"), abfd, shdr->sh_size);
570 bfd_set_error (bfd_error_bad_value);
574 memset (shdr->contents, 0, amt);
576 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
577 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
581 /* Translate raw contents, a flag word followed by an
582 array of elf section indices all in target byte order,
583 to the flag word followed by an array of elf section
585 src = shdr->contents + shdr->sh_size;
586 dest = (Elf_Internal_Group *) (shdr->contents + amt);
593 idx = H_GET_32 (abfd, src);
594 if (src == shdr->contents)
597 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
598 shdr->bfd_section->flags
599 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
604 ((*_bfd_error_handler)
605 (_("%B: invalid SHT_GROUP entry"), abfd));
608 dest->shdr = elf_elfsections (abfd)[idx];
615 if (num_group != (unsigned) -1)
619 for (i = 0; i < num_group; i++)
621 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
622 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
623 unsigned int n_elt = shdr->sh_size / 4;
625 /* Look through this group's sections to see if current
626 section is a member. */
628 if ((++idx)->shdr == hdr)
632 /* We are a member of this group. Go looking through
633 other members to see if any others are linked via
635 idx = (Elf_Internal_Group *) shdr->contents;
636 n_elt = shdr->sh_size / 4;
638 if ((s = (++idx)->shdr->bfd_section) != NULL
639 && elf_next_in_group (s) != NULL)
643 /* Snarf the group name from other member, and
644 insert current section in circular list. */
645 elf_group_name (newsect) = elf_group_name (s);
646 elf_next_in_group (newsect) = elf_next_in_group (s);
647 elf_next_in_group (s) = newsect;
653 gname = group_signature (abfd, shdr);
656 elf_group_name (newsect) = gname;
658 /* Start a circular list with one element. */
659 elf_next_in_group (newsect) = newsect;
662 /* If the group section has been created, point to the
664 if (shdr->bfd_section != NULL)
665 elf_next_in_group (shdr->bfd_section) = newsect;
673 if (elf_group_name (newsect) == NULL)
675 (*_bfd_error_handler) (_("%B: no group info for section %A"),
682 _bfd_elf_setup_sections (bfd *abfd)
685 unsigned int num_group = elf_tdata (abfd)->num_group;
686 bfd_boolean result = TRUE;
689 /* Process SHF_LINK_ORDER. */
690 for (s = abfd->sections; s != NULL; s = s->next)
692 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
693 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
695 unsigned int elfsec = this_hdr->sh_link;
696 /* FIXME: The old Intel compiler and old strip/objcopy may
697 not set the sh_link or sh_info fields. Hence we could
698 get the situation where elfsec is 0. */
701 const struct elf_backend_data *bed
702 = get_elf_backend_data (abfd);
703 if (bed->link_order_error_handler)
704 bed->link_order_error_handler
705 (_("%B: warning: sh_link not set for section `%A'"),
712 this_hdr = elf_elfsections (abfd)[elfsec];
715 Some strip/objcopy may leave an incorrect value in
716 sh_link. We don't want to proceed. */
717 link = this_hdr->bfd_section;
720 (*_bfd_error_handler)
721 (_("%B: sh_link [%d] in section `%A' is incorrect"),
722 s->owner, s, elfsec);
726 elf_linked_to_section (s) = link;
731 /* Process section groups. */
732 if (num_group == (unsigned) -1)
735 for (i = 0; i < num_group; i++)
737 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
738 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
739 unsigned int n_elt = shdr->sh_size / 4;
742 if ((++idx)->shdr->bfd_section)
743 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
744 else if (idx->shdr->sh_type == SHT_RELA
745 || idx->shdr->sh_type == SHT_REL)
746 /* We won't include relocation sections in section groups in
747 output object files. We adjust the group section size here
748 so that relocatable link will work correctly when
749 relocation sections are in section group in input object
751 shdr->bfd_section->size -= 4;
754 /* There are some unknown sections in the group. */
755 (*_bfd_error_handler)
756 (_("%B: unknown [%d] section `%s' in group [%s]"),
758 (unsigned int) idx->shdr->sh_type,
759 bfd_elf_string_from_elf_section (abfd,
760 (elf_elfheader (abfd)
763 shdr->bfd_section->name);
771 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
773 return elf_next_in_group (sec) != NULL;
776 /* Make a BFD section from an ELF section. We store a pointer to the
777 BFD section in the bfd_section field of the header. */
780 _bfd_elf_make_section_from_shdr (bfd *abfd,
781 Elf_Internal_Shdr *hdr,
787 const struct elf_backend_data *bed;
789 if (hdr->bfd_section != NULL)
791 BFD_ASSERT (strcmp (name,
792 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
796 newsect = bfd_make_section_anyway (abfd, name);
800 hdr->bfd_section = newsect;
801 elf_section_data (newsect)->this_hdr = *hdr;
802 elf_section_data (newsect)->this_idx = shindex;
804 /* Always use the real type/flags. */
805 elf_section_type (newsect) = hdr->sh_type;
806 elf_section_flags (newsect) = hdr->sh_flags;
808 newsect->filepos = hdr->sh_offset;
810 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
811 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
812 || ! bfd_set_section_alignment (abfd, newsect,
813 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
816 flags = SEC_NO_FLAGS;
817 if (hdr->sh_type != SHT_NOBITS)
818 flags |= SEC_HAS_CONTENTS;
819 if (hdr->sh_type == SHT_GROUP)
820 flags |= SEC_GROUP | SEC_EXCLUDE;
821 if ((hdr->sh_flags & SHF_ALLOC) != 0)
824 if (hdr->sh_type != SHT_NOBITS)
827 if ((hdr->sh_flags & SHF_WRITE) == 0)
828 flags |= SEC_READONLY;
829 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
831 else if ((flags & SEC_LOAD) != 0)
833 if ((hdr->sh_flags & SHF_MERGE) != 0)
836 newsect->entsize = hdr->sh_entsize;
837 if ((hdr->sh_flags & SHF_STRINGS) != 0)
838 flags |= SEC_STRINGS;
840 if (hdr->sh_flags & SHF_GROUP)
841 if (!setup_group (abfd, hdr, newsect))
843 if ((hdr->sh_flags & SHF_TLS) != 0)
844 flags |= SEC_THREAD_LOCAL;
846 if ((flags & SEC_ALLOC) == 0)
848 /* The debugging sections appear to be recognized only by name,
849 not any sort of flag. Their SEC_ALLOC bits are cleared. */
854 } debug_sections [] =
856 { STRING_COMMA_LEN ("debug") }, /* 'd' */
857 { NULL, 0 }, /* 'e' */
858 { NULL, 0 }, /* 'f' */
859 { STRING_COMMA_LEN ("gnu.linkonce.wi.") }, /* 'g' */
860 { NULL, 0 }, /* 'h' */
861 { NULL, 0 }, /* 'i' */
862 { NULL, 0 }, /* 'j' */
863 { NULL, 0 }, /* 'k' */
864 { STRING_COMMA_LEN ("line") }, /* 'l' */
865 { NULL, 0 }, /* 'm' */
866 { NULL, 0 }, /* 'n' */
867 { NULL, 0 }, /* 'o' */
868 { NULL, 0 }, /* 'p' */
869 { NULL, 0 }, /* 'q' */
870 { NULL, 0 }, /* 'r' */
871 { STRING_COMMA_LEN ("stab") } /* 's' */
876 int i = name [1] - 'd';
878 && i < (int) ARRAY_SIZE (debug_sections)
879 && debug_sections [i].name != NULL
880 && strncmp (&name [1], debug_sections [i].name,
881 debug_sections [i].len) == 0)
882 flags |= SEC_DEBUGGING;
886 /* As a GNU extension, if the name begins with .gnu.linkonce, we
887 only link a single copy of the section. This is used to support
888 g++. g++ will emit each template expansion in its own section.
889 The symbols will be defined as weak, so that multiple definitions
890 are permitted. The GNU linker extension is to actually discard
891 all but one of the sections. */
892 if (CONST_STRNEQ (name, ".gnu.linkonce")
893 && elf_next_in_group (newsect) == NULL)
894 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
896 bed = get_elf_backend_data (abfd);
897 if (bed->elf_backend_section_flags)
898 if (! bed->elf_backend_section_flags (&flags, hdr))
901 if (! bfd_set_section_flags (abfd, newsect, flags))
904 /* We do not parse the PT_NOTE segments as we are interested even in the
905 separate debug info files which may have the segments offsets corrupted.
906 PT_NOTEs from the core files are currently not parsed using BFD. */
907 if (hdr->sh_type == SHT_NOTE)
911 contents = bfd_malloc (hdr->sh_size);
915 if (!bfd_get_section_contents (abfd, hdr->bfd_section, contents, 0,
917 || !elf_parse_notes (abfd, contents, hdr->sh_size, -1))
926 if ((flags & SEC_ALLOC) != 0)
928 Elf_Internal_Phdr *phdr;
931 /* Look through the phdrs to see if we need to adjust the lma.
932 If all the p_paddr fields are zero, we ignore them, since
933 some ELF linkers produce such output. */
934 phdr = elf_tdata (abfd)->phdr;
935 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
937 if (phdr->p_paddr != 0)
940 if (i < elf_elfheader (abfd)->e_phnum)
942 phdr = elf_tdata (abfd)->phdr;
943 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
945 /* This section is part of this segment if its file
946 offset plus size lies within the segment's memory
947 span and, if the section is loaded, the extent of the
948 loaded data lies within the extent of the segment.
950 Note - we used to check the p_paddr field as well, and
951 refuse to set the LMA if it was 0. This is wrong
952 though, as a perfectly valid initialised segment can
953 have a p_paddr of zero. Some architectures, eg ARM,
954 place special significance on the address 0 and
955 executables need to be able to have a segment which
956 covers this address. */
957 if (phdr->p_type == PT_LOAD
958 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
959 && (hdr->sh_offset + hdr->sh_size
960 <= phdr->p_offset + phdr->p_memsz)
961 && ((flags & SEC_LOAD) == 0
962 || (hdr->sh_offset + hdr->sh_size
963 <= phdr->p_offset + phdr->p_filesz)))
965 if ((flags & SEC_LOAD) == 0)
966 newsect->lma = (phdr->p_paddr
967 + hdr->sh_addr - phdr->p_vaddr);
969 /* We used to use the same adjustment for SEC_LOAD
970 sections, but that doesn't work if the segment
971 is packed with code from multiple VMAs.
972 Instead we calculate the section LMA based on
973 the segment LMA. It is assumed that the
974 segment will contain sections with contiguous
975 LMAs, even if the VMAs are not. */
976 newsect->lma = (phdr->p_paddr
977 + hdr->sh_offset - phdr->p_offset);
979 /* With contiguous segments, we can't tell from file
980 offsets whether a section with zero size should
981 be placed at the end of one segment or the
982 beginning of the next. Decide based on vaddr. */
983 if (hdr->sh_addr >= phdr->p_vaddr
984 && (hdr->sh_addr + hdr->sh_size
985 <= phdr->p_vaddr + phdr->p_memsz))
1000 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
1003 Helper functions for GDB to locate the string tables.
1004 Since BFD hides string tables from callers, GDB needs to use an
1005 internal hook to find them. Sun's .stabstr, in particular,
1006 isn't even pointed to by the .stab section, so ordinary
1007 mechanisms wouldn't work to find it, even if we had some.
1010 struct elf_internal_shdr *
1011 bfd_elf_find_section (bfd *abfd, char *name)
1013 Elf_Internal_Shdr **i_shdrp;
1018 i_shdrp = elf_elfsections (abfd);
1019 if (i_shdrp != NULL)
1021 shstrtab = bfd_elf_get_str_section (abfd,
1022 elf_elfheader (abfd)->e_shstrndx);
1023 if (shstrtab != NULL)
1025 max = elf_numsections (abfd);
1026 for (i = 1; i < max; i++)
1027 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
1034 const char *const bfd_elf_section_type_names[] = {
1035 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1036 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1037 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1040 /* ELF relocs are against symbols. If we are producing relocatable
1041 output, and the reloc is against an external symbol, and nothing
1042 has given us any additional addend, the resulting reloc will also
1043 be against the same symbol. In such a case, we don't want to
1044 change anything about the way the reloc is handled, since it will
1045 all be done at final link time. Rather than put special case code
1046 into bfd_perform_relocation, all the reloc types use this howto
1047 function. It just short circuits the reloc if producing
1048 relocatable output against an external symbol. */
1050 bfd_reloc_status_type
1051 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1052 arelent *reloc_entry,
1054 void *data ATTRIBUTE_UNUSED,
1055 asection *input_section,
1057 char **error_message ATTRIBUTE_UNUSED)
1059 if (output_bfd != NULL
1060 && (symbol->flags & BSF_SECTION_SYM) == 0
1061 && (! reloc_entry->howto->partial_inplace
1062 || reloc_entry->addend == 0))
1064 reloc_entry->address += input_section->output_offset;
1065 return bfd_reloc_ok;
1068 return bfd_reloc_continue;
1071 /* Copy the program header and other data from one object module to
1075 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1077 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1078 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1081 BFD_ASSERT (!elf_flags_init (obfd)
1082 || (elf_elfheader (obfd)->e_flags
1083 == elf_elfheader (ibfd)->e_flags));
1085 elf_gp (obfd) = elf_gp (ibfd);
1086 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1087 elf_flags_init (obfd) = TRUE;
1089 /* Copy object attributes. */
1090 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1096 get_segment_type (unsigned int p_type)
1101 case PT_NULL: pt = "NULL"; break;
1102 case PT_LOAD: pt = "LOAD"; break;
1103 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1104 case PT_INTERP: pt = "INTERP"; break;
1105 case PT_NOTE: pt = "NOTE"; break;
1106 case PT_SHLIB: pt = "SHLIB"; break;
1107 case PT_PHDR: pt = "PHDR"; break;
1108 case PT_TLS: pt = "TLS"; break;
1109 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1110 case PT_GNU_STACK: pt = "STACK"; break;
1111 case PT_GNU_RELRO: pt = "RELRO"; break;
1112 default: pt = NULL; break;
1117 /* Print out the program headers. */
1120 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1123 Elf_Internal_Phdr *p;
1125 bfd_byte *dynbuf = NULL;
1127 p = elf_tdata (abfd)->phdr;
1132 fprintf (f, _("\nProgram Header:\n"));
1133 c = elf_elfheader (abfd)->e_phnum;
1134 for (i = 0; i < c; i++, p++)
1136 const char *pt = get_segment_type (p->p_type);
1141 sprintf (buf, "0x%lx", p->p_type);
1144 fprintf (f, "%8s off 0x", pt);
1145 bfd_fprintf_vma (abfd, f, p->p_offset);
1146 fprintf (f, " vaddr 0x");
1147 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1148 fprintf (f, " paddr 0x");
1149 bfd_fprintf_vma (abfd, f, p->p_paddr);
1150 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1151 fprintf (f, " filesz 0x");
1152 bfd_fprintf_vma (abfd, f, p->p_filesz);
1153 fprintf (f, " memsz 0x");
1154 bfd_fprintf_vma (abfd, f, p->p_memsz);
1155 fprintf (f, " flags %c%c%c",
1156 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1157 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1158 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1159 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1160 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1165 s = bfd_get_section_by_name (abfd, ".dynamic");
1169 unsigned long shlink;
1170 bfd_byte *extdyn, *extdynend;
1172 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1174 fprintf (f, _("\nDynamic Section:\n"));
1176 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1179 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1182 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1184 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1185 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1188 extdynend = extdyn + s->size;
1189 for (; extdyn < extdynend; extdyn += extdynsize)
1191 Elf_Internal_Dyn dyn;
1194 bfd_boolean stringp;
1196 (*swap_dyn_in) (abfd, extdyn, &dyn);
1198 if (dyn.d_tag == DT_NULL)
1205 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1209 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1210 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1211 case DT_PLTGOT: name = "PLTGOT"; break;
1212 case DT_HASH: name = "HASH"; break;
1213 case DT_STRTAB: name = "STRTAB"; break;
1214 case DT_SYMTAB: name = "SYMTAB"; break;
1215 case DT_RELA: name = "RELA"; break;
1216 case DT_RELASZ: name = "RELASZ"; break;
1217 case DT_RELAENT: name = "RELAENT"; break;
1218 case DT_STRSZ: name = "STRSZ"; break;
1219 case DT_SYMENT: name = "SYMENT"; break;
1220 case DT_INIT: name = "INIT"; break;
1221 case DT_FINI: name = "FINI"; break;
1222 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1223 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1224 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1225 case DT_REL: name = "REL"; break;
1226 case DT_RELSZ: name = "RELSZ"; break;
1227 case DT_RELENT: name = "RELENT"; break;
1228 case DT_PLTREL: name = "PLTREL"; break;
1229 case DT_DEBUG: name = "DEBUG"; break;
1230 case DT_TEXTREL: name = "TEXTREL"; break;
1231 case DT_JMPREL: name = "JMPREL"; break;
1232 case DT_BIND_NOW: name = "BIND_NOW"; break;
1233 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1234 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1235 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1236 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1237 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1238 case DT_FLAGS: name = "FLAGS"; break;
1239 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1240 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1241 case DT_CHECKSUM: name = "CHECKSUM"; break;
1242 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1243 case DT_MOVEENT: name = "MOVEENT"; break;
1244 case DT_MOVESZ: name = "MOVESZ"; break;
1245 case DT_FEATURE: name = "FEATURE"; break;
1246 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1247 case DT_SYMINSZ: name = "SYMINSZ"; break;
1248 case DT_SYMINENT: name = "SYMINENT"; break;
1249 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1250 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1251 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1252 case DT_PLTPAD: name = "PLTPAD"; break;
1253 case DT_MOVETAB: name = "MOVETAB"; break;
1254 case DT_SYMINFO: name = "SYMINFO"; break;
1255 case DT_RELACOUNT: name = "RELACOUNT"; break;
1256 case DT_RELCOUNT: name = "RELCOUNT"; break;
1257 case DT_FLAGS_1: name = "FLAGS_1"; break;
1258 case DT_VERSYM: name = "VERSYM"; break;
1259 case DT_VERDEF: name = "VERDEF"; break;
1260 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1261 case DT_VERNEED: name = "VERNEED"; break;
1262 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1263 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1264 case DT_USED: name = "USED"; break;
1265 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1266 case DT_GNU_HASH: name = "GNU_HASH"; break;
1269 fprintf (f, " %-11s ", name);
1271 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1275 unsigned int tagv = dyn.d_un.d_val;
1277 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1280 fprintf (f, "%s", string);
1289 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1290 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1292 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1296 if (elf_dynverdef (abfd) != 0)
1298 Elf_Internal_Verdef *t;
1300 fprintf (f, _("\nVersion definitions:\n"));
1301 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1303 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1304 t->vd_flags, t->vd_hash,
1305 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1306 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1308 Elf_Internal_Verdaux *a;
1311 for (a = t->vd_auxptr->vda_nextptr;
1315 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1321 if (elf_dynverref (abfd) != 0)
1323 Elf_Internal_Verneed *t;
1325 fprintf (f, _("\nVersion References:\n"));
1326 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1328 Elf_Internal_Vernaux *a;
1330 fprintf (f, _(" required from %s:\n"),
1331 t->vn_filename ? t->vn_filename : "<corrupt>");
1332 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1333 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1334 a->vna_flags, a->vna_other,
1335 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1347 /* Display ELF-specific fields of a symbol. */
1350 bfd_elf_print_symbol (bfd *abfd,
1353 bfd_print_symbol_type how)
1358 case bfd_print_symbol_name:
1359 fprintf (file, "%s", symbol->name);
1361 case bfd_print_symbol_more:
1362 fprintf (file, "elf ");
1363 bfd_fprintf_vma (abfd, file, symbol->value);
1364 fprintf (file, " %lx", (long) symbol->flags);
1366 case bfd_print_symbol_all:
1368 const char *section_name;
1369 const char *name = NULL;
1370 const struct elf_backend_data *bed;
1371 unsigned char st_other;
1374 section_name = symbol->section ? symbol->section->name : "(*none*)";
1376 bed = get_elf_backend_data (abfd);
1377 if (bed->elf_backend_print_symbol_all)
1378 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1382 name = symbol->name;
1383 bfd_print_symbol_vandf (abfd, file, symbol);
1386 fprintf (file, " %s\t", section_name);
1387 /* Print the "other" value for a symbol. For common symbols,
1388 we've already printed the size; now print the alignment.
1389 For other symbols, we have no specified alignment, and
1390 we've printed the address; now print the size. */
1391 if (symbol->section && bfd_is_com_section (symbol->section))
1392 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1394 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1395 bfd_fprintf_vma (abfd, file, val);
1397 /* If we have version information, print it. */
1398 if (elf_tdata (abfd)->dynversym_section != 0
1399 && (elf_tdata (abfd)->dynverdef_section != 0
1400 || elf_tdata (abfd)->dynverref_section != 0))
1402 unsigned int vernum;
1403 const char *version_string;
1405 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1408 version_string = "";
1409 else if (vernum == 1)
1410 version_string = "Base";
1411 else if (vernum <= elf_tdata (abfd)->cverdefs)
1413 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1416 Elf_Internal_Verneed *t;
1418 version_string = "";
1419 for (t = elf_tdata (abfd)->verref;
1423 Elf_Internal_Vernaux *a;
1425 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1427 if (a->vna_other == vernum)
1429 version_string = a->vna_nodename;
1436 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1437 fprintf (file, " %-11s", version_string);
1442 fprintf (file, " (%s)", version_string);
1443 for (i = 10 - strlen (version_string); i > 0; --i)
1448 /* If the st_other field is not zero, print it. */
1449 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1454 case STV_INTERNAL: fprintf (file, " .internal"); break;
1455 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1456 case STV_PROTECTED: fprintf (file, " .protected"); break;
1458 /* Some other non-defined flags are also present, so print
1460 fprintf (file, " 0x%02x", (unsigned int) st_other);
1463 fprintf (file, " %s", name);
1469 /* Allocate an ELF string table--force the first byte to be zero. */
1471 struct bfd_strtab_hash *
1472 _bfd_elf_stringtab_init (void)
1474 struct bfd_strtab_hash *ret;
1476 ret = _bfd_stringtab_init ();
1481 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1482 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1483 if (loc == (bfd_size_type) -1)
1485 _bfd_stringtab_free (ret);
1492 /* ELF .o/exec file reading */
1494 /* Create a new bfd section from an ELF section header. */
1497 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1499 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1500 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1501 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1504 name = bfd_elf_string_from_elf_section (abfd,
1505 elf_elfheader (abfd)->e_shstrndx,
1510 switch (hdr->sh_type)
1513 /* Inactive section. Throw it away. */
1516 case SHT_PROGBITS: /* Normal section with contents. */
1517 case SHT_NOBITS: /* .bss section. */
1518 case SHT_HASH: /* .hash section. */
1519 case SHT_NOTE: /* .note section. */
1520 case SHT_INIT_ARRAY: /* .init_array section. */
1521 case SHT_FINI_ARRAY: /* .fini_array section. */
1522 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1523 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1524 case SHT_GNU_HASH: /* .gnu.hash section. */
1525 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1527 case SHT_DYNAMIC: /* Dynamic linking information. */
1528 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1530 if (hdr->sh_link > elf_numsections (abfd)
1531 || elf_elfsections (abfd)[hdr->sh_link] == NULL)
1533 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1535 Elf_Internal_Shdr *dynsymhdr;
1537 /* The shared libraries distributed with hpux11 have a bogus
1538 sh_link field for the ".dynamic" section. Find the
1539 string table for the ".dynsym" section instead. */
1540 if (elf_dynsymtab (abfd) != 0)
1542 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1543 hdr->sh_link = dynsymhdr->sh_link;
1547 unsigned int i, num_sec;
1549 num_sec = elf_numsections (abfd);
1550 for (i = 1; i < num_sec; i++)
1552 dynsymhdr = elf_elfsections (abfd)[i];
1553 if (dynsymhdr->sh_type == SHT_DYNSYM)
1555 hdr->sh_link = dynsymhdr->sh_link;
1563 case SHT_SYMTAB: /* A symbol table */
1564 if (elf_onesymtab (abfd) == shindex)
1567 if (hdr->sh_entsize != bed->s->sizeof_sym)
1569 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1570 elf_onesymtab (abfd) = shindex;
1571 elf_tdata (abfd)->symtab_hdr = *hdr;
1572 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1573 abfd->flags |= HAS_SYMS;
1575 /* Sometimes a shared object will map in the symbol table. If
1576 SHF_ALLOC is set, and this is a shared object, then we also
1577 treat this section as a BFD section. We can not base the
1578 decision purely on SHF_ALLOC, because that flag is sometimes
1579 set in a relocatable object file, which would confuse the
1581 if ((hdr->sh_flags & SHF_ALLOC) != 0
1582 && (abfd->flags & DYNAMIC) != 0
1583 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1587 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1588 can't read symbols without that section loaded as well. It
1589 is most likely specified by the next section header. */
1590 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1592 unsigned int i, num_sec;
1594 num_sec = elf_numsections (abfd);
1595 for (i = shindex + 1; i < num_sec; i++)
1597 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1598 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1599 && hdr2->sh_link == shindex)
1603 for (i = 1; i < shindex; i++)
1605 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1606 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1607 && hdr2->sh_link == shindex)
1611 return bfd_section_from_shdr (abfd, i);
1615 case SHT_DYNSYM: /* A dynamic symbol table */
1616 if (elf_dynsymtab (abfd) == shindex)
1619 if (hdr->sh_entsize != bed->s->sizeof_sym)
1621 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1622 elf_dynsymtab (abfd) = shindex;
1623 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1624 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1625 abfd->flags |= HAS_SYMS;
1627 /* Besides being a symbol table, we also treat this as a regular
1628 section, so that objcopy can handle it. */
1629 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1631 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1632 if (elf_symtab_shndx (abfd) == shindex)
1635 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1636 elf_symtab_shndx (abfd) = shindex;
1637 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1638 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1641 case SHT_STRTAB: /* A string table */
1642 if (hdr->bfd_section != NULL)
1644 if (ehdr->e_shstrndx == shindex)
1646 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1647 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1650 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1653 elf_tdata (abfd)->strtab_hdr = *hdr;
1654 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1657 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1660 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1661 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1662 elf_elfsections (abfd)[shindex] = hdr;
1663 /* We also treat this as a regular section, so that objcopy
1665 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1669 /* If the string table isn't one of the above, then treat it as a
1670 regular section. We need to scan all the headers to be sure,
1671 just in case this strtab section appeared before the above. */
1672 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1674 unsigned int i, num_sec;
1676 num_sec = elf_numsections (abfd);
1677 for (i = 1; i < num_sec; i++)
1679 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1680 if (hdr2->sh_link == shindex)
1682 /* Prevent endless recursion on broken objects. */
1685 if (! bfd_section_from_shdr (abfd, i))
1687 if (elf_onesymtab (abfd) == i)
1689 if (elf_dynsymtab (abfd) == i)
1690 goto dynsymtab_strtab;
1694 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1698 /* *These* do a lot of work -- but build no sections! */
1700 asection *target_sect;
1701 Elf_Internal_Shdr *hdr2;
1702 unsigned int num_sec = elf_numsections (abfd);
1705 != (bfd_size_type) (hdr->sh_type == SHT_REL
1706 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
1709 /* Check for a bogus link to avoid crashing. */
1710 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1711 || hdr->sh_link >= num_sec)
1713 ((*_bfd_error_handler)
1714 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1715 abfd, hdr->sh_link, name, shindex));
1716 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1720 /* For some incomprehensible reason Oracle distributes
1721 libraries for Solaris in which some of the objects have
1722 bogus sh_link fields. It would be nice if we could just
1723 reject them, but, unfortunately, some people need to use
1724 them. We scan through the section headers; if we find only
1725 one suitable symbol table, we clobber the sh_link to point
1726 to it. I hope this doesn't break anything. */
1727 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1728 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1734 for (scan = 1; scan < num_sec; scan++)
1736 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1737 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1748 hdr->sh_link = found;
1751 /* Get the symbol table. */
1752 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1753 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
1754 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1757 /* If this reloc section does not use the main symbol table we
1758 don't treat it as a reloc section. BFD can't adequately
1759 represent such a section, so at least for now, we don't
1760 try. We just present it as a normal section. We also
1761 can't use it as a reloc section if it points to the null
1762 section, an invalid section, or another reloc section. */
1763 if (hdr->sh_link != elf_onesymtab (abfd)
1764 || hdr->sh_info == SHN_UNDEF
1765 || (hdr->sh_info >= SHN_LORESERVE && hdr->sh_info <= SHN_HIRESERVE)
1766 || hdr->sh_info >= num_sec
1767 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
1768 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
1769 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1772 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1774 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1775 if (target_sect == NULL)
1778 if ((target_sect->flags & SEC_RELOC) == 0
1779 || target_sect->reloc_count == 0)
1780 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1784 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1785 amt = sizeof (*hdr2);
1786 hdr2 = bfd_alloc (abfd, amt);
1787 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1790 elf_elfsections (abfd)[shindex] = hdr2;
1791 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1792 target_sect->flags |= SEC_RELOC;
1793 target_sect->relocation = NULL;
1794 target_sect->rel_filepos = hdr->sh_offset;
1795 /* In the section to which the relocations apply, mark whether
1796 its relocations are of the REL or RELA variety. */
1797 if (hdr->sh_size != 0)
1798 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
1799 abfd->flags |= HAS_RELOC;
1803 case SHT_GNU_verdef:
1804 elf_dynverdef (abfd) = shindex;
1805 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1806 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1808 case SHT_GNU_versym:
1809 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
1811 elf_dynversym (abfd) = shindex;
1812 elf_tdata (abfd)->dynversym_hdr = *hdr;
1813 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1815 case SHT_GNU_verneed:
1816 elf_dynverref (abfd) = shindex;
1817 elf_tdata (abfd)->dynverref_hdr = *hdr;
1818 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1824 /* We need a BFD section for objcopy and relocatable linking,
1825 and it's handy to have the signature available as the section
1827 if (! IS_VALID_GROUP_SECTION_HEADER (hdr))
1829 name = group_signature (abfd, hdr);
1832 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1834 if (hdr->contents != NULL)
1836 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1837 unsigned int n_elt = hdr->sh_size / GRP_ENTRY_SIZE;
1840 if (idx->flags & GRP_COMDAT)
1841 hdr->bfd_section->flags
1842 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1844 /* We try to keep the same section order as it comes in. */
1846 while (--n_elt != 0)
1850 if (idx->shdr != NULL
1851 && (s = idx->shdr->bfd_section) != NULL
1852 && elf_next_in_group (s) != NULL)
1854 elf_next_in_group (hdr->bfd_section) = s;
1862 /* Possibly an attributes section. */
1863 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
1864 || hdr->sh_type == bed->obj_attrs_section_type)
1866 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1868 _bfd_elf_parse_attributes (abfd, hdr);
1872 /* Check for any processor-specific section types. */
1873 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
1876 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
1878 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1879 /* FIXME: How to properly handle allocated section reserved
1880 for applications? */
1881 (*_bfd_error_handler)
1882 (_("%B: don't know how to handle allocated, application "
1883 "specific section `%s' [0x%8x]"),
1884 abfd, name, hdr->sh_type);
1886 /* Allow sections reserved for applications. */
1887 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1890 else if (hdr->sh_type >= SHT_LOPROC
1891 && hdr->sh_type <= SHT_HIPROC)
1892 /* FIXME: We should handle this section. */
1893 (*_bfd_error_handler)
1894 (_("%B: don't know how to handle processor specific section "
1896 abfd, name, hdr->sh_type);
1897 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
1899 /* Unrecognised OS-specific sections. */
1900 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
1901 /* SHF_OS_NONCONFORMING indicates that special knowledge is
1902 required to correctly process the section and the file should
1903 be rejected with an error message. */
1904 (*_bfd_error_handler)
1905 (_("%B: don't know how to handle OS specific section "
1907 abfd, name, hdr->sh_type);
1909 /* Otherwise it should be processed. */
1910 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1913 /* FIXME: We should handle this section. */
1914 (*_bfd_error_handler)
1915 (_("%B: don't know how to handle section `%s' [0x%8x]"),
1916 abfd, name, hdr->sh_type);
1924 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
1925 Return SEC for sections that have no elf section, and NULL on error. */
1928 bfd_section_from_r_symndx (bfd *abfd,
1929 struct sym_sec_cache *cache,
1931 unsigned long r_symndx)
1933 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
1936 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
1938 Elf_Internal_Shdr *symtab_hdr;
1939 unsigned char esym[sizeof (Elf64_External_Sym)];
1940 Elf_External_Sym_Shndx eshndx;
1941 Elf_Internal_Sym isym;
1943 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1944 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
1945 &isym, esym, &eshndx) == NULL)
1948 if (cache->abfd != abfd)
1950 memset (cache->indx, -1, sizeof (cache->indx));
1953 cache->indx[ent] = r_symndx;
1954 cache->shndx[ent] = isym.st_shndx;
1957 s = bfd_section_from_elf_index (abfd, cache->shndx[ent]);
1964 /* Given an ELF section number, retrieve the corresponding BFD
1968 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
1970 if (index >= elf_numsections (abfd))
1972 return elf_elfsections (abfd)[index]->bfd_section;
1975 static const struct bfd_elf_special_section special_sections_b[] =
1977 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1978 { NULL, 0, 0, 0, 0 }
1981 static const struct bfd_elf_special_section special_sections_c[] =
1983 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
1984 { NULL, 0, 0, 0, 0 }
1987 static const struct bfd_elf_special_section special_sections_d[] =
1989 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1990 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1991 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
1992 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
1993 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
1994 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
1995 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
1996 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
1997 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
1998 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
1999 { NULL, 0, 0, 0, 0 }
2002 static const struct bfd_elf_special_section special_sections_f[] =
2004 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2005 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2006 { NULL, 0, 0, 0, 0 }
2009 static const struct bfd_elf_special_section special_sections_g[] =
2011 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2012 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2013 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2014 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2015 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2016 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2017 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2018 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2019 { NULL, 0, 0, 0, 0 }
2022 static const struct bfd_elf_special_section special_sections_h[] =
2024 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2025 { NULL, 0, 0, 0, 0 }
2028 static const struct bfd_elf_special_section special_sections_i[] =
2030 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2031 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2032 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2033 { NULL, 0, 0, 0, 0 }
2036 static const struct bfd_elf_special_section special_sections_l[] =
2038 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2039 { NULL, 0, 0, 0, 0 }
2042 static const struct bfd_elf_special_section special_sections_n[] =
2044 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2045 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2046 { NULL, 0, 0, 0, 0 }
2049 static const struct bfd_elf_special_section special_sections_p[] =
2051 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2052 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2053 { NULL, 0, 0, 0, 0 }
2056 static const struct bfd_elf_special_section special_sections_r[] =
2058 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2059 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2060 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2061 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2062 { NULL, 0, 0, 0, 0 }
2065 static const struct bfd_elf_special_section special_sections_s[] =
2067 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2068 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2069 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2070 /* See struct bfd_elf_special_section declaration for the semantics of
2071 this special case where .prefix_length != strlen (.prefix). */
2072 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2073 { NULL, 0, 0, 0, 0 }
2076 static const struct bfd_elf_special_section special_sections_t[] =
2078 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2079 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2080 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2081 { NULL, 0, 0, 0, 0 }
2084 static const struct bfd_elf_special_section *special_sections[] =
2086 special_sections_b, /* 'b' */
2087 special_sections_c, /* 'c' */
2088 special_sections_d, /* 'd' */
2090 special_sections_f, /* 'f' */
2091 special_sections_g, /* 'g' */
2092 special_sections_h, /* 'h' */
2093 special_sections_i, /* 'i' */
2096 special_sections_l, /* 'l' */
2098 special_sections_n, /* 'n' */
2100 special_sections_p, /* 'p' */
2102 special_sections_r, /* 'r' */
2103 special_sections_s, /* 's' */
2104 special_sections_t, /* 't' */
2107 const struct bfd_elf_special_section *
2108 _bfd_elf_get_special_section (const char *name,
2109 const struct bfd_elf_special_section *spec,
2115 len = strlen (name);
2117 for (i = 0; spec[i].prefix != NULL; i++)
2120 int prefix_len = spec[i].prefix_length;
2122 if (len < prefix_len)
2124 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2127 suffix_len = spec[i].suffix_length;
2128 if (suffix_len <= 0)
2130 if (name[prefix_len] != 0)
2132 if (suffix_len == 0)
2134 if (name[prefix_len] != '.'
2135 && (suffix_len == -2
2136 || (rela && spec[i].type == SHT_REL)))
2142 if (len < prefix_len + suffix_len)
2144 if (memcmp (name + len - suffix_len,
2145 spec[i].prefix + prefix_len,
2155 const struct bfd_elf_special_section *
2156 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2159 const struct bfd_elf_special_section *spec;
2160 const struct elf_backend_data *bed;
2162 /* See if this is one of the special sections. */
2163 if (sec->name == NULL)
2166 bed = get_elf_backend_data (abfd);
2167 spec = bed->special_sections;
2170 spec = _bfd_elf_get_special_section (sec->name,
2171 bed->special_sections,
2177 if (sec->name[0] != '.')
2180 i = sec->name[1] - 'b';
2181 if (i < 0 || i > 't' - 'b')
2184 spec = special_sections[i];
2189 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2193 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2195 struct bfd_elf_section_data *sdata;
2196 const struct elf_backend_data *bed;
2197 const struct bfd_elf_special_section *ssect;
2199 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2202 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2205 sec->used_by_bfd = sdata;
2208 /* Indicate whether or not this section should use RELA relocations. */
2209 bed = get_elf_backend_data (abfd);
2210 sec->use_rela_p = bed->default_use_rela_p;
2212 /* When we read a file, we don't need to set ELF section type and
2213 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2214 anyway. We will set ELF section type and flags for all linker
2215 created sections. If user specifies BFD section flags, we will
2216 set ELF section type and flags based on BFD section flags in
2217 elf_fake_sections. */
2218 if ((!sec->flags && abfd->direction != read_direction)
2219 || (sec->flags & SEC_LINKER_CREATED) != 0)
2221 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2224 elf_section_type (sec) = ssect->type;
2225 elf_section_flags (sec) = ssect->attr;
2229 return _bfd_generic_new_section_hook (abfd, sec);
2232 /* Create a new bfd section from an ELF program header.
2234 Since program segments have no names, we generate a synthetic name
2235 of the form segment<NUM>, where NUM is generally the index in the
2236 program header table. For segments that are split (see below) we
2237 generate the names segment<NUM>a and segment<NUM>b.
2239 Note that some program segments may have a file size that is different than
2240 (less than) the memory size. All this means is that at execution the
2241 system must allocate the amount of memory specified by the memory size,
2242 but only initialize it with the first "file size" bytes read from the
2243 file. This would occur for example, with program segments consisting
2244 of combined data+bss.
2246 To handle the above situation, this routine generates TWO bfd sections
2247 for the single program segment. The first has the length specified by
2248 the file size of the segment, and the second has the length specified
2249 by the difference between the two sizes. In effect, the segment is split
2250 into its initialized and uninitialized parts.
2255 _bfd_elf_make_section_from_phdr (bfd *abfd,
2256 Elf_Internal_Phdr *hdr,
2258 const char *typename)
2266 split = ((hdr->p_memsz > 0)
2267 && (hdr->p_filesz > 0)
2268 && (hdr->p_memsz > hdr->p_filesz));
2270 if (hdr->p_filesz > 0)
2272 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2273 len = strlen (namebuf) + 1;
2274 name = bfd_alloc (abfd, len);
2277 memcpy (name, namebuf, len);
2278 newsect = bfd_make_section (abfd, name);
2279 if (newsect == NULL)
2281 newsect->vma = hdr->p_vaddr;
2282 newsect->lma = hdr->p_paddr;
2283 newsect->size = hdr->p_filesz;
2284 newsect->filepos = hdr->p_offset;
2285 newsect->flags |= SEC_HAS_CONTENTS;
2286 newsect->alignment_power = bfd_log2 (hdr->p_align);
2287 if (hdr->p_type == PT_LOAD)
2289 newsect->flags |= SEC_ALLOC;
2290 newsect->flags |= SEC_LOAD;
2291 if (hdr->p_flags & PF_X)
2293 /* FIXME: all we known is that it has execute PERMISSION,
2295 newsect->flags |= SEC_CODE;
2298 if (!(hdr->p_flags & PF_W))
2300 newsect->flags |= SEC_READONLY;
2304 if (hdr->p_memsz > hdr->p_filesz)
2308 sprintf (namebuf, "%s%d%s", typename, index, split ? "b" : "");
2309 len = strlen (namebuf) + 1;
2310 name = bfd_alloc (abfd, len);
2313 memcpy (name, namebuf, len);
2314 newsect = bfd_make_section (abfd, name);
2315 if (newsect == NULL)
2317 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2318 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2319 newsect->size = hdr->p_memsz - hdr->p_filesz;
2320 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2321 align = newsect->vma & -newsect->vma;
2322 if (align == 0 || align > hdr->p_align)
2323 align = hdr->p_align;
2324 newsect->alignment_power = bfd_log2 (align);
2325 if (hdr->p_type == PT_LOAD)
2327 /* Hack for gdb. Segments that have not been modified do
2328 not have their contents written to a core file, on the
2329 assumption that a debugger can find the contents in the
2330 executable. We flag this case by setting the fake
2331 section size to zero. Note that "real" bss sections will
2332 always have their contents dumped to the core file. */
2333 if (bfd_get_format (abfd) == bfd_core)
2335 newsect->flags |= SEC_ALLOC;
2336 if (hdr->p_flags & PF_X)
2337 newsect->flags |= SEC_CODE;
2339 if (!(hdr->p_flags & PF_W))
2340 newsect->flags |= SEC_READONLY;
2347 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2349 const struct elf_backend_data *bed;
2351 switch (hdr->p_type)
2354 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2357 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2360 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2363 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2366 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2368 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2373 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2376 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2378 case PT_GNU_EH_FRAME:
2379 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2383 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2386 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
2389 /* Check for any processor-specific program segment types. */
2390 bed = get_elf_backend_data (abfd);
2391 return bed->elf_backend_section_from_phdr (abfd, hdr, index, "proc");
2395 /* Initialize REL_HDR, the section-header for new section, containing
2396 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2397 relocations; otherwise, we use REL relocations. */
2400 _bfd_elf_init_reloc_shdr (bfd *abfd,
2401 Elf_Internal_Shdr *rel_hdr,
2403 bfd_boolean use_rela_p)
2406 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2407 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2409 name = bfd_alloc (abfd, amt);
2412 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2414 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2416 if (rel_hdr->sh_name == (unsigned int) -1)
2418 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2419 rel_hdr->sh_entsize = (use_rela_p
2420 ? bed->s->sizeof_rela
2421 : bed->s->sizeof_rel);
2422 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2423 rel_hdr->sh_flags = 0;
2424 rel_hdr->sh_addr = 0;
2425 rel_hdr->sh_size = 0;
2426 rel_hdr->sh_offset = 0;
2431 /* Set up an ELF internal section header for a section. */
2434 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2436 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2437 bfd_boolean *failedptr = failedptrarg;
2438 Elf_Internal_Shdr *this_hdr;
2439 unsigned int sh_type;
2443 /* We already failed; just get out of the bfd_map_over_sections
2448 this_hdr = &elf_section_data (asect)->this_hdr;
2450 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2451 asect->name, FALSE);
2452 if (this_hdr->sh_name == (unsigned int) -1)
2458 /* Don't clear sh_flags. Assembler may set additional bits. */
2460 if ((asect->flags & SEC_ALLOC) != 0
2461 || asect->user_set_vma)
2462 this_hdr->sh_addr = asect->vma;
2464 this_hdr->sh_addr = 0;
2466 this_hdr->sh_offset = 0;
2467 this_hdr->sh_size = asect->size;
2468 this_hdr->sh_link = 0;
2469 this_hdr->sh_addralign = 1 << asect->alignment_power;
2470 /* The sh_entsize and sh_info fields may have been set already by
2471 copy_private_section_data. */
2473 this_hdr->bfd_section = asect;
2474 this_hdr->contents = NULL;
2476 /* If the section type is unspecified, we set it based on
2478 if ((asect->flags & SEC_GROUP) != 0)
2479 sh_type = SHT_GROUP;
2480 else if ((asect->flags & SEC_ALLOC) != 0
2481 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2482 || (asect->flags & SEC_NEVER_LOAD) != 0))
2483 sh_type = SHT_NOBITS;
2485 sh_type = SHT_PROGBITS;
2487 if (this_hdr->sh_type == SHT_NULL)
2488 this_hdr->sh_type = sh_type;
2489 else if (this_hdr->sh_type == SHT_NOBITS
2490 && sh_type == SHT_PROGBITS
2491 && (asect->flags & SEC_ALLOC) != 0)
2493 /* Warn if we are changing a NOBITS section to PROGBITS, but
2494 allow the link to proceed. This can happen when users link
2495 non-bss input sections to bss output sections, or emit data
2496 to a bss output section via a linker script. */
2497 (*_bfd_error_handler)
2498 (_("section `%A' type changed to PROGBITS"), asect);
2499 this_hdr->sh_type = sh_type;
2502 switch (this_hdr->sh_type)
2508 case SHT_INIT_ARRAY:
2509 case SHT_FINI_ARRAY:
2510 case SHT_PREINIT_ARRAY:
2517 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2521 this_hdr->sh_entsize = bed->s->sizeof_sym;
2525 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2529 if (get_elf_backend_data (abfd)->may_use_rela_p)
2530 this_hdr->sh_entsize = bed->s->sizeof_rela;
2534 if (get_elf_backend_data (abfd)->may_use_rel_p)
2535 this_hdr->sh_entsize = bed->s->sizeof_rel;
2538 case SHT_GNU_versym:
2539 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2542 case SHT_GNU_verdef:
2543 this_hdr->sh_entsize = 0;
2544 /* objcopy or strip will copy over sh_info, but may not set
2545 cverdefs. The linker will set cverdefs, but sh_info will be
2547 if (this_hdr->sh_info == 0)
2548 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2550 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2551 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2554 case SHT_GNU_verneed:
2555 this_hdr->sh_entsize = 0;
2556 /* objcopy or strip will copy over sh_info, but may not set
2557 cverrefs. The linker will set cverrefs, but sh_info will be
2559 if (this_hdr->sh_info == 0)
2560 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2562 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2563 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2567 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
2571 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
2575 if ((asect->flags & SEC_ALLOC) != 0)
2576 this_hdr->sh_flags |= SHF_ALLOC;
2577 if ((asect->flags & SEC_READONLY) == 0)
2578 this_hdr->sh_flags |= SHF_WRITE;
2579 if ((asect->flags & SEC_CODE) != 0)
2580 this_hdr->sh_flags |= SHF_EXECINSTR;
2581 if ((asect->flags & SEC_MERGE) != 0)
2583 this_hdr->sh_flags |= SHF_MERGE;
2584 this_hdr->sh_entsize = asect->entsize;
2585 if ((asect->flags & SEC_STRINGS) != 0)
2586 this_hdr->sh_flags |= SHF_STRINGS;
2588 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2589 this_hdr->sh_flags |= SHF_GROUP;
2590 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2592 this_hdr->sh_flags |= SHF_TLS;
2593 if (asect->size == 0
2594 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2596 struct bfd_link_order *o = asect->map_tail.link_order;
2598 this_hdr->sh_size = 0;
2601 this_hdr->sh_size = o->offset + o->size;
2602 if (this_hdr->sh_size != 0)
2603 this_hdr->sh_type = SHT_NOBITS;
2608 /* Check for processor-specific section types. */
2609 sh_type = this_hdr->sh_type;
2610 if (bed->elf_backend_fake_sections
2611 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2614 if (sh_type == SHT_NOBITS && asect->size != 0)
2616 /* Don't change the header type from NOBITS if we are being
2617 called for objcopy --only-keep-debug. */
2618 this_hdr->sh_type = sh_type;
2621 /* If the section has relocs, set up a section header for the
2622 SHT_REL[A] section. If two relocation sections are required for
2623 this section, it is up to the processor-specific back-end to
2624 create the other. */
2625 if ((asect->flags & SEC_RELOC) != 0
2626 && !_bfd_elf_init_reloc_shdr (abfd,
2627 &elf_section_data (asect)->rel_hdr,
2633 /* Fill in the contents of a SHT_GROUP section. */
2636 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2638 bfd_boolean *failedptr = failedptrarg;
2639 unsigned long symindx;
2640 asection *elt, *first;
2644 /* Ignore linker created group section. See elfNN_ia64_object_p in
2646 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2651 if (elf_group_id (sec) != NULL)
2652 symindx = elf_group_id (sec)->udata.i;
2656 /* If called from the assembler, swap_out_syms will have set up
2657 elf_section_syms; If called for "ld -r", use target_index. */
2658 if (elf_section_syms (abfd) != NULL)
2659 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2661 symindx = sec->target_index;
2663 elf_section_data (sec)->this_hdr.sh_info = symindx;
2665 /* The contents won't be allocated for "ld -r" or objcopy. */
2667 if (sec->contents == NULL)
2670 sec->contents = bfd_alloc (abfd, sec->size);
2672 /* Arrange for the section to be written out. */
2673 elf_section_data (sec)->this_hdr.contents = sec->contents;
2674 if (sec->contents == NULL)
2681 loc = sec->contents + sec->size;
2683 /* Get the pointer to the first section in the group that gas
2684 squirreled away here. objcopy arranges for this to be set to the
2685 start of the input section group. */
2686 first = elt = elf_next_in_group (sec);
2688 /* First element is a flag word. Rest of section is elf section
2689 indices for all the sections of the group. Write them backwards
2690 just to keep the group in the same order as given in .section
2691 directives, not that it matters. */
2700 s = s->output_section;
2703 idx = elf_section_data (s)->this_idx;
2704 H_PUT_32 (abfd, idx, loc);
2705 elt = elf_next_in_group (elt);
2710 if ((loc -= 4) != sec->contents)
2713 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2716 /* Assign all ELF section numbers. The dummy first section is handled here
2717 too. The link/info pointers for the standard section types are filled
2718 in here too, while we're at it. */
2721 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2723 struct elf_obj_tdata *t = elf_tdata (abfd);
2725 unsigned int section_number, secn;
2726 Elf_Internal_Shdr **i_shdrp;
2727 struct bfd_elf_section_data *d;
2731 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2733 /* SHT_GROUP sections are in relocatable files only. */
2734 if (link_info == NULL || link_info->relocatable)
2736 /* Put SHT_GROUP sections first. */
2737 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2739 d = elf_section_data (sec);
2741 if (d->this_hdr.sh_type == SHT_GROUP)
2743 if (sec->flags & SEC_LINKER_CREATED)
2745 /* Remove the linker created SHT_GROUP sections. */
2746 bfd_section_list_remove (abfd, sec);
2747 abfd->section_count--;
2751 if (section_number == SHN_LORESERVE)
2752 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2753 d->this_idx = section_number++;
2759 for (sec = abfd->sections; sec; sec = sec->next)
2761 d = elf_section_data (sec);
2763 if (d->this_hdr.sh_type != SHT_GROUP)
2765 if (section_number == SHN_LORESERVE)
2766 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2767 d->this_idx = section_number++;
2769 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2770 if ((sec->flags & SEC_RELOC) == 0)
2774 if (section_number == SHN_LORESERVE)
2775 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2776 d->rel_idx = section_number++;
2777 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2782 if (section_number == SHN_LORESERVE)
2783 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2784 d->rel_idx2 = section_number++;
2785 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2791 if (section_number == SHN_LORESERVE)
2792 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2793 t->shstrtab_section = section_number++;
2794 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2795 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2797 if (bfd_get_symcount (abfd) > 0)
2799 if (section_number == SHN_LORESERVE)
2800 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2801 t->symtab_section = section_number++;
2802 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2803 if (section_number > SHN_LORESERVE - 2)
2805 if (section_number == SHN_LORESERVE)
2806 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2807 t->symtab_shndx_section = section_number++;
2808 t->symtab_shndx_hdr.sh_name
2809 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2810 ".symtab_shndx", FALSE);
2811 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2814 if (section_number == SHN_LORESERVE)
2815 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2816 t->strtab_section = section_number++;
2817 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2820 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2821 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2823 elf_numsections (abfd) = section_number;
2824 elf_elfheader (abfd)->e_shnum = section_number;
2825 if (section_number > SHN_LORESERVE)
2826 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2828 /* Set up the list of section header pointers, in agreement with the
2830 i_shdrp = bfd_zalloc2 (abfd, section_number, sizeof (Elf_Internal_Shdr *));
2831 if (i_shdrp == NULL)
2834 i_shdrp[0] = bfd_zalloc (abfd, sizeof (Elf_Internal_Shdr));
2835 if (i_shdrp[0] == NULL)
2837 bfd_release (abfd, i_shdrp);
2841 elf_elfsections (abfd) = i_shdrp;
2843 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2844 if (bfd_get_symcount (abfd) > 0)
2846 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2847 if (elf_numsections (abfd) > SHN_LORESERVE)
2849 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2850 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2852 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2853 t->symtab_hdr.sh_link = t->strtab_section;
2856 for (sec = abfd->sections; sec; sec = sec->next)
2858 struct bfd_elf_section_data *d = elf_section_data (sec);
2862 i_shdrp[d->this_idx] = &d->this_hdr;
2863 if (d->rel_idx != 0)
2864 i_shdrp[d->rel_idx] = &d->rel_hdr;
2865 if (d->rel_idx2 != 0)
2866 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2868 /* Fill in the sh_link and sh_info fields while we're at it. */
2870 /* sh_link of a reloc section is the section index of the symbol
2871 table. sh_info is the section index of the section to which
2872 the relocation entries apply. */
2873 if (d->rel_idx != 0)
2875 d->rel_hdr.sh_link = t->symtab_section;
2876 d->rel_hdr.sh_info = d->this_idx;
2878 if (d->rel_idx2 != 0)
2880 d->rel_hdr2->sh_link = t->symtab_section;
2881 d->rel_hdr2->sh_info = d->this_idx;
2884 /* We need to set up sh_link for SHF_LINK_ORDER. */
2885 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
2887 s = elf_linked_to_section (sec);
2890 /* elf_linked_to_section points to the input section. */
2891 if (link_info != NULL)
2893 /* Check discarded linkonce section. */
2894 if (elf_discarded_section (s))
2897 (*_bfd_error_handler)
2898 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
2899 abfd, d->this_hdr.bfd_section,
2901 /* Point to the kept section if it has the same
2902 size as the discarded one. */
2903 kept = _bfd_elf_check_kept_section (s, link_info);
2906 bfd_set_error (bfd_error_bad_value);
2912 s = s->output_section;
2913 BFD_ASSERT (s != NULL);
2917 /* Handle objcopy. */
2918 if (s->output_section == NULL)
2920 (*_bfd_error_handler)
2921 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
2922 abfd, d->this_hdr.bfd_section, s, s->owner);
2923 bfd_set_error (bfd_error_bad_value);
2926 s = s->output_section;
2928 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2933 The Intel C compiler generates SHT_IA_64_UNWIND with
2934 SHF_LINK_ORDER. But it doesn't set the sh_link or
2935 sh_info fields. Hence we could get the situation
2937 const struct elf_backend_data *bed
2938 = get_elf_backend_data (abfd);
2939 if (bed->link_order_error_handler)
2940 bed->link_order_error_handler
2941 (_("%B: warning: sh_link not set for section `%A'"),
2946 switch (d->this_hdr.sh_type)
2950 /* A reloc section which we are treating as a normal BFD
2951 section. sh_link is the section index of the symbol
2952 table. sh_info is the section index of the section to
2953 which the relocation entries apply. We assume that an
2954 allocated reloc section uses the dynamic symbol table.
2955 FIXME: How can we be sure? */
2956 s = bfd_get_section_by_name (abfd, ".dynsym");
2958 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2960 /* We look up the section the relocs apply to by name. */
2962 if (d->this_hdr.sh_type == SHT_REL)
2966 s = bfd_get_section_by_name (abfd, name);
2968 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2972 /* We assume that a section named .stab*str is a stabs
2973 string section. We look for a section with the same name
2974 but without the trailing ``str'', and set its sh_link
2975 field to point to this section. */
2976 if (CONST_STRNEQ (sec->name, ".stab")
2977 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2982 len = strlen (sec->name);
2983 alc = bfd_malloc (len - 2);
2986 memcpy (alc, sec->name, len - 3);
2987 alc[len - 3] = '\0';
2988 s = bfd_get_section_by_name (abfd, alc);
2992 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
2994 /* This is a .stab section. */
2995 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
2996 elf_section_data (s)->this_hdr.sh_entsize
2997 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3004 case SHT_GNU_verneed:
3005 case SHT_GNU_verdef:
3006 /* sh_link is the section header index of the string table
3007 used for the dynamic entries, or the symbol table, or the
3009 s = bfd_get_section_by_name (abfd, ".dynstr");
3011 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3014 case SHT_GNU_LIBLIST:
3015 /* sh_link is the section header index of the prelink library
3016 list used for the dynamic entries, or the symbol table, or
3017 the version strings. */
3018 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3019 ? ".dynstr" : ".gnu.libstr");
3021 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3026 case SHT_GNU_versym:
3027 /* sh_link is the section header index of the symbol table
3028 this hash table or version table is for. */
3029 s = bfd_get_section_by_name (abfd, ".dynsym");
3031 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3035 d->this_hdr.sh_link = t->symtab_section;
3039 for (secn = 1; secn < section_number; ++secn)
3040 if (i_shdrp[secn] == NULL)
3041 i_shdrp[secn] = i_shdrp[0];
3043 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3044 i_shdrp[secn]->sh_name);
3048 /* Map symbol from it's internal number to the external number, moving
3049 all local symbols to be at the head of the list. */
3052 sym_is_global (bfd *abfd, asymbol *sym)
3054 /* If the backend has a special mapping, use it. */
3055 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3056 if (bed->elf_backend_sym_is_global)
3057 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3059 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3060 || bfd_is_und_section (bfd_get_section (sym))
3061 || bfd_is_com_section (bfd_get_section (sym)));
3064 /* Don't output section symbols for sections that are not going to be
3065 output. Also, don't output section symbols for reloc and other
3066 special sections. */
3069 ignore_section_sym (bfd *abfd, asymbol *sym)
3071 return ((sym->flags & BSF_SECTION_SYM) != 0
3073 || (sym->section->owner != abfd
3074 && (sym->section->output_section->owner != abfd
3075 || sym->section->output_offset != 0))));
3079 elf_map_symbols (bfd *abfd)
3081 unsigned int symcount = bfd_get_symcount (abfd);
3082 asymbol **syms = bfd_get_outsymbols (abfd);
3083 asymbol **sect_syms;
3084 unsigned int num_locals = 0;
3085 unsigned int num_globals = 0;
3086 unsigned int num_locals2 = 0;
3087 unsigned int num_globals2 = 0;
3094 fprintf (stderr, "elf_map_symbols\n");
3098 for (asect = abfd->sections; asect; asect = asect->next)
3100 if (max_index < asect->index)
3101 max_index = asect->index;
3105 sect_syms = bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3106 if (sect_syms == NULL)
3108 elf_section_syms (abfd) = sect_syms;
3109 elf_num_section_syms (abfd) = max_index;
3111 /* Init sect_syms entries for any section symbols we have already
3112 decided to output. */
3113 for (idx = 0; idx < symcount; idx++)
3115 asymbol *sym = syms[idx];
3117 if ((sym->flags & BSF_SECTION_SYM) != 0
3118 && !ignore_section_sym (abfd, sym))
3120 asection *sec = sym->section;
3122 if (sec->owner != abfd)
3123 sec = sec->output_section;
3125 sect_syms[sec->index] = syms[idx];
3129 /* Classify all of the symbols. */
3130 for (idx = 0; idx < symcount; idx++)
3132 if (ignore_section_sym (abfd, syms[idx]))
3134 if (!sym_is_global (abfd, syms[idx]))
3140 /* We will be adding a section symbol for each normal BFD section. Most
3141 sections will already have a section symbol in outsymbols, but
3142 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3143 at least in that case. */
3144 for (asect = abfd->sections; asect; asect = asect->next)
3146 if (sect_syms[asect->index] == NULL)
3148 if (!sym_is_global (abfd, asect->symbol))
3155 /* Now sort the symbols so the local symbols are first. */
3156 new_syms = bfd_alloc2 (abfd, num_locals + num_globals, sizeof (asymbol *));
3158 if (new_syms == NULL)
3161 for (idx = 0; idx < symcount; idx++)
3163 asymbol *sym = syms[idx];
3166 if (ignore_section_sym (abfd, sym))
3168 if (!sym_is_global (abfd, sym))
3171 i = num_locals + num_globals2++;
3173 sym->udata.i = i + 1;
3175 for (asect = abfd->sections; asect; asect = asect->next)
3177 if (sect_syms[asect->index] == NULL)
3179 asymbol *sym = asect->symbol;
3182 sect_syms[asect->index] = sym;
3183 if (!sym_is_global (abfd, sym))
3186 i = num_locals + num_globals2++;
3188 sym->udata.i = i + 1;
3192 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3194 elf_num_locals (abfd) = num_locals;
3195 elf_num_globals (abfd) = num_globals;
3199 /* Align to the maximum file alignment that could be required for any
3200 ELF data structure. */
3202 static inline file_ptr
3203 align_file_position (file_ptr off, int align)
3205 return (off + align - 1) & ~(align - 1);
3208 /* Assign a file position to a section, optionally aligning to the
3209 required section alignment. */
3212 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3220 al = i_shdrp->sh_addralign;
3222 offset = BFD_ALIGN (offset, al);
3224 i_shdrp->sh_offset = offset;
3225 if (i_shdrp->bfd_section != NULL)
3226 i_shdrp->bfd_section->filepos = offset;
3227 if (i_shdrp->sh_type != SHT_NOBITS)
3228 offset += i_shdrp->sh_size;
3232 /* Compute the file positions we are going to put the sections at, and
3233 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3234 is not NULL, this is being called by the ELF backend linker. */
3237 _bfd_elf_compute_section_file_positions (bfd *abfd,
3238 struct bfd_link_info *link_info)
3240 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3242 struct bfd_strtab_hash *strtab = NULL;
3243 Elf_Internal_Shdr *shstrtab_hdr;
3245 if (abfd->output_has_begun)
3248 /* Do any elf backend specific processing first. */
3249 if (bed->elf_backend_begin_write_processing)
3250 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3252 if (! prep_headers (abfd))
3255 /* Post process the headers if necessary. */
3256 if (bed->elf_backend_post_process_headers)
3257 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3260 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3264 if (!assign_section_numbers (abfd, link_info))
3267 /* The backend linker builds symbol table information itself. */
3268 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3270 /* Non-zero if doing a relocatable link. */
3271 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3273 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3277 if (link_info == NULL)
3279 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3284 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3285 /* sh_name was set in prep_headers. */
3286 shstrtab_hdr->sh_type = SHT_STRTAB;
3287 shstrtab_hdr->sh_flags = 0;
3288 shstrtab_hdr->sh_addr = 0;
3289 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3290 shstrtab_hdr->sh_entsize = 0;
3291 shstrtab_hdr->sh_link = 0;
3292 shstrtab_hdr->sh_info = 0;
3293 /* sh_offset is set in assign_file_positions_except_relocs. */
3294 shstrtab_hdr->sh_addralign = 1;
3296 if (!assign_file_positions_except_relocs (abfd, link_info))
3299 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3302 Elf_Internal_Shdr *hdr;
3304 off = elf_tdata (abfd)->next_file_pos;
3306 hdr = &elf_tdata (abfd)->symtab_hdr;
3307 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3309 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3310 if (hdr->sh_size != 0)
3311 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3313 hdr = &elf_tdata (abfd)->strtab_hdr;
3314 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3316 elf_tdata (abfd)->next_file_pos = off;
3318 /* Now that we know where the .strtab section goes, write it
3320 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3321 || ! _bfd_stringtab_emit (abfd, strtab))
3323 _bfd_stringtab_free (strtab);
3326 abfd->output_has_begun = TRUE;
3331 /* Make an initial estimate of the size of the program header. If we
3332 get the number wrong here, we'll redo section placement. */
3334 static bfd_size_type
3335 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3339 const struct elf_backend_data *bed;
3341 /* Assume we will need exactly two PT_LOAD segments: one for text
3342 and one for data. */
3345 s = bfd_get_section_by_name (abfd, ".interp");
3346 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3348 /* If we have a loadable interpreter section, we need a
3349 PT_INTERP segment. In this case, assume we also need a
3350 PT_PHDR segment, although that may not be true for all
3355 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3357 /* We need a PT_DYNAMIC segment. */
3360 if (elf_tdata (abfd)->relro)
3362 /* We need a PT_GNU_RELRO segment only when there is a
3363 PT_DYNAMIC segment. */
3368 if (elf_tdata (abfd)->eh_frame_hdr)
3370 /* We need a PT_GNU_EH_FRAME segment. */
3374 if (elf_tdata (abfd)->stack_flags)
3376 /* We need a PT_GNU_STACK segment. */
3380 for (s = abfd->sections; s != NULL; s = s->next)
3382 if ((s->flags & SEC_LOAD) != 0
3383 && CONST_STRNEQ (s->name, ".note"))
3385 /* We need a PT_NOTE segment. */
3387 /* Try to create just one PT_NOTE segment
3388 for all adjacent loadable .note* sections.
3389 gABI requires that within a PT_NOTE segment
3390 (and also inside of each SHT_NOTE section)
3391 each note is padded to a multiple of 4 size,
3392 so we check whether the sections are correctly
3394 if (s->alignment_power == 2)
3395 while (s->next != NULL
3396 && s->next->alignment_power == 2
3397 && (s->next->flags & SEC_LOAD) != 0
3398 && CONST_STRNEQ (s->next->name, ".note"))
3403 for (s = abfd->sections; s != NULL; s = s->next)
3405 if (s->flags & SEC_THREAD_LOCAL)
3407 /* We need a PT_TLS segment. */
3413 /* Let the backend count up any program headers it might need. */
3414 bed = get_elf_backend_data (abfd);
3415 if (bed->elf_backend_additional_program_headers)
3419 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3425 return segs * bed->s->sizeof_phdr;
3428 /* Create a mapping from a set of sections to a program segment. */
3430 static struct elf_segment_map *
3431 make_mapping (bfd *abfd,
3432 asection **sections,
3437 struct elf_segment_map *m;
3442 amt = sizeof (struct elf_segment_map);
3443 amt += (to - from - 1) * sizeof (asection *);
3444 m = bfd_zalloc (abfd, amt);
3448 m->p_type = PT_LOAD;
3449 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3450 m->sections[i - from] = *hdrpp;
3451 m->count = to - from;
3453 if (from == 0 && phdr)
3455 /* Include the headers in the first PT_LOAD segment. */
3456 m->includes_filehdr = 1;
3457 m->includes_phdrs = 1;
3463 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3466 struct elf_segment_map *
3467 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3469 struct elf_segment_map *m;
3471 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3475 m->p_type = PT_DYNAMIC;
3477 m->sections[0] = dynsec;
3482 /* Possibly add or remove segments from the segment map. */
3485 elf_modify_segment_map (bfd *abfd,
3486 struct bfd_link_info *info,
3487 bfd_boolean remove_empty_load)
3489 struct elf_segment_map **m;
3490 const struct elf_backend_data *bed;
3492 /* The placement algorithm assumes that non allocated sections are
3493 not in PT_LOAD segments. We ensure this here by removing such
3494 sections from the segment map. We also remove excluded
3495 sections. Finally, any PT_LOAD segment without sections is
3497 m = &elf_tdata (abfd)->segment_map;
3500 unsigned int i, new_count;
3502 for (new_count = 0, i = 0; i < (*m)->count; i++)
3504 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3505 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3506 || (*m)->p_type != PT_LOAD))
3508 (*m)->sections[new_count] = (*m)->sections[i];
3512 (*m)->count = new_count;
3514 if (remove_empty_load && (*m)->p_type == PT_LOAD && (*m)->count == 0)
3520 bed = get_elf_backend_data (abfd);
3521 if (bed->elf_backend_modify_segment_map != NULL)
3523 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3530 /* Set up a mapping from BFD sections to program segments. */
3533 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3536 struct elf_segment_map *m;
3537 asection **sections = NULL;
3538 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3539 bfd_boolean no_user_phdrs;
3541 no_user_phdrs = elf_tdata (abfd)->segment_map == NULL;
3542 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
3546 struct elf_segment_map *mfirst;
3547 struct elf_segment_map **pm;
3550 unsigned int phdr_index;
3551 bfd_vma maxpagesize;
3553 bfd_boolean phdr_in_segment = TRUE;
3554 bfd_boolean writable;
3556 asection *first_tls = NULL;
3557 asection *dynsec, *eh_frame_hdr;
3560 /* Select the allocated sections, and sort them. */
3562 sections = bfd_malloc2 (bfd_count_sections (abfd), sizeof (asection *));
3563 if (sections == NULL)
3567 for (s = abfd->sections; s != NULL; s = s->next)
3569 if ((s->flags & SEC_ALLOC) != 0)
3575 BFD_ASSERT (i <= bfd_count_sections (abfd));
3578 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3580 /* Build the mapping. */
3585 /* If we have a .interp section, then create a PT_PHDR segment for
3586 the program headers and a PT_INTERP segment for the .interp
3588 s = bfd_get_section_by_name (abfd, ".interp");
3589 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3591 amt = sizeof (struct elf_segment_map);
3592 m = bfd_zalloc (abfd, amt);
3596 m->p_type = PT_PHDR;
3597 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3598 m->p_flags = PF_R | PF_X;
3599 m->p_flags_valid = 1;
3600 m->includes_phdrs = 1;
3605 amt = sizeof (struct elf_segment_map);
3606 m = bfd_zalloc (abfd, amt);
3610 m->p_type = PT_INTERP;
3618 /* Look through the sections. We put sections in the same program
3619 segment when the start of the second section can be placed within
3620 a few bytes of the end of the first section. */
3624 maxpagesize = bed->maxpagesize;
3626 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3628 && (dynsec->flags & SEC_LOAD) == 0)
3631 /* Deal with -Ttext or something similar such that the first section
3632 is not adjacent to the program headers. This is an
3633 approximation, since at this point we don't know exactly how many
3634 program headers we will need. */
3637 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
3639 if (phdr_size == (bfd_size_type) -1)
3640 phdr_size = get_program_header_size (abfd, info);
3641 if ((abfd->flags & D_PAGED) == 0
3642 || sections[0]->lma < phdr_size
3643 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3644 phdr_in_segment = FALSE;
3647 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3650 bfd_boolean new_segment;
3654 /* See if this section and the last one will fit in the same
3657 if (last_hdr == NULL)
3659 /* If we don't have a segment yet, then we don't need a new
3660 one (we build the last one after this loop). */
3661 new_segment = FALSE;
3663 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3665 /* If this section has a different relation between the
3666 virtual address and the load address, then we need a new
3670 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3671 < BFD_ALIGN (hdr->lma, maxpagesize))
3673 /* If putting this section in this segment would force us to
3674 skip a page in the segment, then we need a new segment. */
3677 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3678 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3680 /* We don't want to put a loadable section after a
3681 nonloadable section in the same segment.
3682 Consider .tbss sections as loadable for this purpose. */
3685 else if ((abfd->flags & D_PAGED) == 0)
3687 /* If the file is not demand paged, which means that we
3688 don't require the sections to be correctly aligned in the
3689 file, then there is no other reason for a new segment. */
3690 new_segment = FALSE;
3693 && (hdr->flags & SEC_READONLY) == 0
3694 && (((last_hdr->lma + last_size - 1)
3695 & ~(maxpagesize - 1))
3696 != (hdr->lma & ~(maxpagesize - 1))))
3698 /* We don't want to put a writable section in a read only
3699 segment, unless they are on the same page in memory
3700 anyhow. We already know that the last section does not
3701 bring us past the current section on the page, so the
3702 only case in which the new section is not on the same
3703 page as the previous section is when the previous section
3704 ends precisely on a page boundary. */
3709 /* Otherwise, we can use the same segment. */
3710 new_segment = FALSE;
3713 /* Allow interested parties a chance to override our decision. */
3714 if (last_hdr && info->callbacks->override_segment_assignment)
3715 new_segment = info->callbacks->override_segment_assignment (info, abfd, hdr, last_hdr, new_segment);
3719 if ((hdr->flags & SEC_READONLY) == 0)
3722 /* .tbss sections effectively have zero size. */
3723 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
3724 != SEC_THREAD_LOCAL)
3725 last_size = hdr->size;
3731 /* We need a new program segment. We must create a new program
3732 header holding all the sections from phdr_index until hdr. */
3734 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3741 if ((hdr->flags & SEC_READONLY) == 0)
3747 /* .tbss sections effectively have zero size. */
3748 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3749 last_size = hdr->size;
3753 phdr_in_segment = FALSE;
3756 /* Create a final PT_LOAD program segment. */
3757 if (last_hdr != NULL)
3759 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3767 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3770 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3777 /* For each batch of consecutive loadable .note sections,
3778 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
3779 because if we link together nonloadable .note sections and
3780 loadable .note sections, we will generate two .note sections
3781 in the output file. FIXME: Using names for section types is
3783 for (s = abfd->sections; s != NULL; s = s->next)
3785 if ((s->flags & SEC_LOAD) != 0
3786 && CONST_STRNEQ (s->name, ".note"))
3790 amt = sizeof (struct elf_segment_map);
3791 if (s->alignment_power == 2)
3792 for (s2 = s; s2->next != NULL; s2 = s2->next)
3794 if (s2->next->alignment_power == 2
3795 && (s2->next->flags & SEC_LOAD) != 0
3796 && CONST_STRNEQ (s2->next->name, ".note")
3797 && align_power (s2->vma + s2->size, 2)
3803 amt += (count - 1) * sizeof (asection *);
3804 m = bfd_zalloc (abfd, amt);
3808 m->p_type = PT_NOTE;
3812 m->sections[m->count - count--] = s;
3813 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3816 m->sections[m->count - 1] = s;
3817 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3821 if (s->flags & SEC_THREAD_LOCAL)
3829 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3834 amt = sizeof (struct elf_segment_map);
3835 amt += (tls_count - 1) * sizeof (asection *);
3836 m = bfd_zalloc (abfd, amt);
3841 m->count = tls_count;
3842 /* Mandated PF_R. */
3844 m->p_flags_valid = 1;
3845 for (i = 0; i < tls_count; ++i)
3847 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3848 m->sections[i] = first_tls;
3849 first_tls = first_tls->next;
3856 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3858 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3859 if (eh_frame_hdr != NULL
3860 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3862 amt = sizeof (struct elf_segment_map);
3863 m = bfd_zalloc (abfd, amt);
3867 m->p_type = PT_GNU_EH_FRAME;
3869 m->sections[0] = eh_frame_hdr->output_section;
3875 if (elf_tdata (abfd)->stack_flags)
3877 amt = sizeof (struct elf_segment_map);
3878 m = bfd_zalloc (abfd, amt);
3882 m->p_type = PT_GNU_STACK;
3883 m->p_flags = elf_tdata (abfd)->stack_flags;
3884 m->p_flags_valid = 1;
3890 if (dynsec != NULL && elf_tdata (abfd)->relro)
3892 /* We make a PT_GNU_RELRO segment only when there is a
3893 PT_DYNAMIC segment. */
3894 amt = sizeof (struct elf_segment_map);
3895 m = bfd_zalloc (abfd, amt);
3899 m->p_type = PT_GNU_RELRO;
3901 m->p_flags_valid = 1;
3908 elf_tdata (abfd)->segment_map = mfirst;
3911 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
3914 for (count = 0, m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3916 elf_tdata (abfd)->program_header_size = count * bed->s->sizeof_phdr;
3921 if (sections != NULL)
3926 /* Sort sections by address. */
3929 elf_sort_sections (const void *arg1, const void *arg2)
3931 const asection *sec1 = *(const asection **) arg1;
3932 const asection *sec2 = *(const asection **) arg2;
3933 bfd_size_type size1, size2;
3935 /* Sort by LMA first, since this is the address used to
3936 place the section into a segment. */
3937 if (sec1->lma < sec2->lma)
3939 else if (sec1->lma > sec2->lma)
3942 /* Then sort by VMA. Normally the LMA and the VMA will be
3943 the same, and this will do nothing. */
3944 if (sec1->vma < sec2->vma)
3946 else if (sec1->vma > sec2->vma)
3949 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3951 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3957 /* If the indicies are the same, do not return 0
3958 here, but continue to try the next comparison. */
3959 if (sec1->target_index - sec2->target_index != 0)
3960 return sec1->target_index - sec2->target_index;
3965 else if (TOEND (sec2))
3970 /* Sort by size, to put zero sized sections
3971 before others at the same address. */
3973 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
3974 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
3981 return sec1->target_index - sec2->target_index;
3984 /* Ian Lance Taylor writes:
3986 We shouldn't be using % with a negative signed number. That's just
3987 not good. We have to make sure either that the number is not
3988 negative, or that the number has an unsigned type. When the types
3989 are all the same size they wind up as unsigned. When file_ptr is a
3990 larger signed type, the arithmetic winds up as signed long long,
3993 What we're trying to say here is something like ``increase OFF by
3994 the least amount that will cause it to be equal to the VMA modulo
3996 /* In other words, something like:
3998 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3999 off_offset = off % bed->maxpagesize;
4000 if (vma_offset < off_offset)
4001 adjustment = vma_offset + bed->maxpagesize - off_offset;
4003 adjustment = vma_offset - off_offset;
4005 which can can be collapsed into the expression below. */
4008 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4010 return ((vma - off) % maxpagesize);
4014 print_segment_map (const struct elf_segment_map *m)
4017 const char *pt = get_segment_type (m->p_type);
4022 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
4023 sprintf (buf, "LOPROC+%7.7x",
4024 (unsigned int) (m->p_type - PT_LOPROC));
4025 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
4026 sprintf (buf, "LOOS+%7.7x",
4027 (unsigned int) (m->p_type - PT_LOOS));
4029 snprintf (buf, sizeof (buf), "%8.8x",
4030 (unsigned int) m->p_type);
4033 fprintf (stderr, "%s:", pt);
4034 for (j = 0; j < m->count; j++)
4035 fprintf (stderr, " %s", m->sections [j]->name);
4039 /* Assign file positions to the sections based on the mapping from
4040 sections to segments. This function also sets up some fields in
4044 assign_file_positions_for_load_sections (bfd *abfd,
4045 struct bfd_link_info *link_info)
4047 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4048 struct elf_segment_map *m;
4049 Elf_Internal_Phdr *phdrs;
4050 Elf_Internal_Phdr *p;
4052 bfd_size_type maxpagesize;
4056 if (link_info == NULL
4057 && !elf_modify_segment_map (abfd, link_info, FALSE))
4061 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4064 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4065 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4066 elf_elfheader (abfd)->e_phnum = alloc;
4068 if (elf_tdata (abfd)->program_header_size == (bfd_size_type) -1)
4069 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4071 BFD_ASSERT (elf_tdata (abfd)->program_header_size
4072 >= alloc * bed->s->sizeof_phdr);
4076 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4080 phdrs = bfd_alloc2 (abfd, alloc, sizeof (Elf_Internal_Phdr));
4081 elf_tdata (abfd)->phdr = phdrs;
4086 if ((abfd->flags & D_PAGED) != 0)
4087 maxpagesize = bed->maxpagesize;
4089 off = bed->s->sizeof_ehdr;
4090 off += alloc * bed->s->sizeof_phdr;
4092 for (m = elf_tdata (abfd)->segment_map, p = phdrs, j = 0;
4094 m = m->next, p++, j++)
4098 bfd_boolean no_contents;
4100 /* If elf_segment_map is not from map_sections_to_segments, the
4101 sections may not be correctly ordered. NOTE: sorting should
4102 not be done to the PT_NOTE section of a corefile, which may
4103 contain several pseudo-sections artificially created by bfd.
4104 Sorting these pseudo-sections breaks things badly. */
4106 && !(elf_elfheader (abfd)->e_type == ET_CORE
4107 && m->p_type == PT_NOTE))
4108 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4111 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4112 number of sections with contents contributing to both p_filesz
4113 and p_memsz, followed by a number of sections with no contents
4114 that just contribute to p_memsz. In this loop, OFF tracks next
4115 available file offset for PT_LOAD and PT_NOTE segments. */
4116 p->p_type = m->p_type;
4117 p->p_flags = m->p_flags;
4122 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4124 if (m->p_paddr_valid)
4125 p->p_paddr = m->p_paddr;
4126 else if (m->count == 0)
4129 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
4131 if (p->p_type == PT_LOAD
4132 && (abfd->flags & D_PAGED) != 0)
4134 /* p_align in demand paged PT_LOAD segments effectively stores
4135 the maximum page size. When copying an executable with
4136 objcopy, we set m->p_align from the input file. Use this
4137 value for maxpagesize rather than bed->maxpagesize, which
4138 may be different. Note that we use maxpagesize for PT_TLS
4139 segment alignment later in this function, so we are relying
4140 on at least one PT_LOAD segment appearing before a PT_TLS
4142 if (m->p_align_valid)
4143 maxpagesize = m->p_align;
4145 p->p_align = maxpagesize;
4147 else if (m->count == 0)
4148 p->p_align = 1 << bed->s->log_file_align;
4149 else if (m->p_align_valid)
4150 p->p_align = m->p_align;
4154 no_contents = FALSE;
4156 if (p->p_type == PT_LOAD
4159 bfd_size_type align;
4160 unsigned int align_power = 0;
4162 if (m->p_align_valid)
4166 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4168 unsigned int secalign;
4170 secalign = bfd_get_section_alignment (abfd, *secpp);
4171 if (secalign > align_power)
4172 align_power = secalign;
4174 align = (bfd_size_type) 1 << align_power;
4175 if (align < maxpagesize)
4176 align = maxpagesize;
4179 for (i = 0; i < m->count; i++)
4180 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4181 /* If we aren't making room for this section, then
4182 it must be SHT_NOBITS regardless of what we've
4183 set via struct bfd_elf_special_section. */
4184 elf_section_type (m->sections[i]) = SHT_NOBITS;
4186 /* Find out whether this segment contains any loadable
4187 sections. If the first section isn't loadable, the same
4188 holds for any other sections. */
4190 while (elf_section_type (m->sections[i]) == SHT_NOBITS)
4192 /* If a segment starts with .tbss, we need to look
4193 at the next section to decide whether the segment
4194 has any loadable sections. */
4195 if ((elf_section_flags (m->sections[i]) & SHF_TLS) == 0
4203 off_adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4207 /* We shouldn't need to align the segment on disk since
4208 the segment doesn't need file space, but the gABI
4209 arguably requires the alignment and glibc ld.so
4210 checks it. So to comply with the alignment
4211 requirement but not waste file space, we adjust
4212 p_offset for just this segment. (OFF_ADJUST is
4213 subtracted from OFF later.) This may put p_offset
4214 past the end of file, but that shouldn't matter. */
4219 /* Make sure the .dynamic section is the first section in the
4220 PT_DYNAMIC segment. */
4221 else if (p->p_type == PT_DYNAMIC
4223 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4226 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4228 bfd_set_error (bfd_error_bad_value);
4236 if (m->includes_filehdr)
4238 if (!m->p_flags_valid)
4240 p->p_filesz = bed->s->sizeof_ehdr;
4241 p->p_memsz = bed->s->sizeof_ehdr;
4244 BFD_ASSERT (p->p_type == PT_LOAD);
4246 if (p->p_vaddr < (bfd_vma) off)
4248 (*_bfd_error_handler)
4249 (_("%B: Not enough room for program headers, try linking with -N"),
4251 bfd_set_error (bfd_error_bad_value);
4256 if (!m->p_paddr_valid)
4261 if (m->includes_phdrs)
4263 if (!m->p_flags_valid)
4266 if (!m->includes_filehdr)
4268 p->p_offset = bed->s->sizeof_ehdr;
4272 BFD_ASSERT (p->p_type == PT_LOAD);
4273 p->p_vaddr -= off - p->p_offset;
4274 if (!m->p_paddr_valid)
4275 p->p_paddr -= off - p->p_offset;
4279 p->p_filesz += alloc * bed->s->sizeof_phdr;
4280 p->p_memsz += alloc * bed->s->sizeof_phdr;
4283 if (p->p_type == PT_LOAD
4284 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4286 if (!m->includes_filehdr && !m->includes_phdrs)
4292 adjust = off - (p->p_offset + p->p_filesz);
4294 p->p_filesz += adjust;
4295 p->p_memsz += adjust;
4299 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4300 maps. Set filepos for sections in PT_LOAD segments, and in
4301 core files, for sections in PT_NOTE segments.
4302 assign_file_positions_for_non_load_sections will set filepos
4303 for other sections and update p_filesz for other segments. */
4304 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4307 bfd_size_type align;
4308 Elf_Internal_Shdr *this_hdr;
4311 this_hdr = &elf_section_data (sec)->this_hdr;
4312 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4314 if (p->p_type == PT_LOAD
4315 || p->p_type == PT_TLS)
4317 bfd_signed_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
4319 if (this_hdr->sh_type != SHT_NOBITS
4320 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4321 && ((this_hdr->sh_flags & SHF_TLS) == 0
4322 || p->p_type == PT_TLS)))
4326 (*_bfd_error_handler)
4327 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4328 abfd, sec, (unsigned long) sec->lma);
4331 p->p_memsz += adjust;
4333 if (this_hdr->sh_type != SHT_NOBITS)
4336 p->p_filesz += adjust;
4341 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4343 /* The section at i == 0 is the one that actually contains
4347 this_hdr->sh_offset = sec->filepos = off;
4348 off += this_hdr->sh_size;
4349 p->p_filesz = this_hdr->sh_size;
4355 /* The rest are fake sections that shouldn't be written. */
4364 if (p->p_type == PT_LOAD)
4366 this_hdr->sh_offset = sec->filepos = off;
4367 if (this_hdr->sh_type != SHT_NOBITS)
4368 off += this_hdr->sh_size;
4371 if (this_hdr->sh_type != SHT_NOBITS)
4373 p->p_filesz += this_hdr->sh_size;
4374 /* A load section without SHF_ALLOC is something like
4375 a note section in a PT_NOTE segment. These take
4376 file space but are not loaded into memory. */
4377 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4378 p->p_memsz += this_hdr->sh_size;
4380 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4382 if (p->p_type == PT_TLS)
4383 p->p_memsz += this_hdr->sh_size;
4385 /* .tbss is special. It doesn't contribute to p_memsz of
4387 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
4388 p->p_memsz += this_hdr->sh_size;
4391 if (p->p_type == PT_GNU_RELRO)
4393 else if (align > p->p_align
4394 && !m->p_align_valid
4395 && (p->p_type != PT_LOAD
4396 || (abfd->flags & D_PAGED) == 0))
4400 if (!m->p_flags_valid)
4403 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4405 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4411 /* Check that all sections are in a PT_LOAD segment.
4412 Don't check funky gdb generated core files. */
4413 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4414 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4416 Elf_Internal_Shdr *this_hdr;
4420 this_hdr = &(elf_section_data(sec)->this_hdr);
4421 if (this_hdr->sh_size != 0
4422 && !ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, p))
4424 (*_bfd_error_handler)
4425 (_("%B: section `%A' can't be allocated in segment %d"),
4427 print_segment_map (m);
4428 bfd_set_error (bfd_error_bad_value);
4434 elf_tdata (abfd)->next_file_pos = off;
4438 /* Assign file positions for the other sections. */
4441 assign_file_positions_for_non_load_sections (bfd *abfd,
4442 struct bfd_link_info *link_info)
4444 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4445 Elf_Internal_Shdr **i_shdrpp;
4446 Elf_Internal_Shdr **hdrpp;
4447 Elf_Internal_Phdr *phdrs;
4448 Elf_Internal_Phdr *p;
4449 struct elf_segment_map *m;
4450 bfd_vma filehdr_vaddr, filehdr_paddr;
4451 bfd_vma phdrs_vaddr, phdrs_paddr;
4453 unsigned int num_sec;
4457 i_shdrpp = elf_elfsections (abfd);
4458 num_sec = elf_numsections (abfd);
4459 off = elf_tdata (abfd)->next_file_pos;
4460 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4462 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4463 Elf_Internal_Shdr *hdr;
4466 if (hdr->bfd_section != NULL
4467 && (hdr->bfd_section->filepos != 0
4468 || (hdr->sh_type == SHT_NOBITS
4469 && hdr->contents == NULL)))
4470 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
4471 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4473 if (hdr->sh_size != 0)
4474 ((*_bfd_error_handler)
4475 (_("%B: warning: allocated section `%s' not in segment"),
4477 (hdr->bfd_section == NULL
4479 : hdr->bfd_section->name)));
4480 /* We don't need to page align empty sections. */
4481 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
4482 off += vma_page_aligned_bias (hdr->sh_addr, off,
4485 off += vma_page_aligned_bias (hdr->sh_addr, off,
4487 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4490 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4491 && hdr->bfd_section == NULL)
4492 || hdr == i_shdrpp[tdata->symtab_section]
4493 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4494 || hdr == i_shdrpp[tdata->strtab_section])
4495 hdr->sh_offset = -1;
4497 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4499 if (i == SHN_LORESERVE - 1)
4501 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4502 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4506 /* Now that we have set the section file positions, we can set up
4507 the file positions for the non PT_LOAD segments. */
4511 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4513 phdrs = elf_tdata (abfd)->phdr;
4514 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4519 if (p->p_type != PT_LOAD)
4522 if (m->includes_filehdr)
4524 filehdr_vaddr = p->p_vaddr;
4525 filehdr_paddr = p->p_paddr;
4527 if (m->includes_phdrs)
4529 phdrs_vaddr = p->p_vaddr;
4530 phdrs_paddr = p->p_paddr;
4531 if (m->includes_filehdr)
4533 phdrs_vaddr += bed->s->sizeof_ehdr;
4534 phdrs_paddr += bed->s->sizeof_ehdr;
4539 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4545 if (p->p_type != PT_LOAD
4546 && (p->p_type != PT_NOTE || bfd_get_format (abfd) != bfd_core))
4548 Elf_Internal_Shdr *hdr;
4549 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4551 hdr = &elf_section_data (m->sections[m->count - 1])->this_hdr;
4552 p->p_filesz = (m->sections[m->count - 1]->filepos
4553 - m->sections[0]->filepos);
4554 if (hdr->sh_type != SHT_NOBITS)
4555 p->p_filesz += hdr->sh_size;
4557 p->p_offset = m->sections[0]->filepos;
4562 if (m->includes_filehdr)
4564 p->p_vaddr = filehdr_vaddr;
4565 if (! m->p_paddr_valid)
4566 p->p_paddr = filehdr_paddr;
4568 else if (m->includes_phdrs)
4570 p->p_vaddr = phdrs_vaddr;
4571 if (! m->p_paddr_valid)
4572 p->p_paddr = phdrs_paddr;
4574 else if (p->p_type == PT_GNU_RELRO)
4576 Elf_Internal_Phdr *lp;
4578 for (lp = phdrs; lp < phdrs + count; ++lp)
4580 if (lp->p_type == PT_LOAD
4581 && lp->p_vaddr <= link_info->relro_end
4582 && lp->p_vaddr >= link_info->relro_start
4583 && (lp->p_vaddr + lp->p_filesz
4584 >= link_info->relro_end))
4588 if (lp < phdrs + count
4589 && link_info->relro_end > lp->p_vaddr)
4591 p->p_vaddr = lp->p_vaddr;
4592 p->p_paddr = lp->p_paddr;
4593 p->p_offset = lp->p_offset;
4594 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4595 p->p_memsz = p->p_filesz;
4597 p->p_flags = (lp->p_flags & ~PF_W);
4601 memset (p, 0, sizeof *p);
4602 p->p_type = PT_NULL;
4608 elf_tdata (abfd)->next_file_pos = off;
4613 /* Work out the file positions of all the sections. This is called by
4614 _bfd_elf_compute_section_file_positions. All the section sizes and
4615 VMAs must be known before this is called.
4617 Reloc sections come in two flavours: Those processed specially as
4618 "side-channel" data attached to a section to which they apply, and
4619 those that bfd doesn't process as relocations. The latter sort are
4620 stored in a normal bfd section by bfd_section_from_shdr. We don't
4621 consider the former sort here, unless they form part of the loadable
4622 image. Reloc sections not assigned here will be handled later by
4623 assign_file_positions_for_relocs.
4625 We also don't set the positions of the .symtab and .strtab here. */
4628 assign_file_positions_except_relocs (bfd *abfd,
4629 struct bfd_link_info *link_info)
4631 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4632 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4634 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4636 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4637 && bfd_get_format (abfd) != bfd_core)
4639 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4640 unsigned int num_sec = elf_numsections (abfd);
4641 Elf_Internal_Shdr **hdrpp;
4644 /* Start after the ELF header. */
4645 off = i_ehdrp->e_ehsize;
4647 /* We are not creating an executable, which means that we are
4648 not creating a program header, and that the actual order of
4649 the sections in the file is unimportant. */
4650 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4652 Elf_Internal_Shdr *hdr;
4655 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4656 && hdr->bfd_section == NULL)
4657 || i == tdata->symtab_section
4658 || i == tdata->symtab_shndx_section
4659 || i == tdata->strtab_section)
4661 hdr->sh_offset = -1;
4664 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4666 if (i == SHN_LORESERVE - 1)
4668 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4669 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4677 /* Assign file positions for the loaded sections based on the
4678 assignment of sections to segments. */
4679 if (!assign_file_positions_for_load_sections (abfd, link_info))
4682 /* And for non-load sections. */
4683 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
4686 if (bed->elf_backend_modify_program_headers != NULL)
4688 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
4692 /* Write out the program headers. */
4693 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
4694 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4695 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
4698 off = tdata->next_file_pos;
4701 /* Place the section headers. */
4702 off = align_file_position (off, 1 << bed->s->log_file_align);
4703 i_ehdrp->e_shoff = off;
4704 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4706 tdata->next_file_pos = off;
4712 prep_headers (bfd *abfd)
4714 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4715 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4716 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4717 struct elf_strtab_hash *shstrtab;
4718 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4720 i_ehdrp = elf_elfheader (abfd);
4721 i_shdrp = elf_elfsections (abfd);
4723 shstrtab = _bfd_elf_strtab_init ();
4724 if (shstrtab == NULL)
4727 elf_shstrtab (abfd) = shstrtab;
4729 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4730 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4731 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4732 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4734 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4735 i_ehdrp->e_ident[EI_DATA] =
4736 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4737 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4739 if ((abfd->flags & DYNAMIC) != 0)
4740 i_ehdrp->e_type = ET_DYN;
4741 else if ((abfd->flags & EXEC_P) != 0)
4742 i_ehdrp->e_type = ET_EXEC;
4743 else if (bfd_get_format (abfd) == bfd_core)
4744 i_ehdrp->e_type = ET_CORE;
4746 i_ehdrp->e_type = ET_REL;
4748 switch (bfd_get_arch (abfd))
4750 case bfd_arch_unknown:
4751 i_ehdrp->e_machine = EM_NONE;
4754 /* There used to be a long list of cases here, each one setting
4755 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4756 in the corresponding bfd definition. To avoid duplication,
4757 the switch was removed. Machines that need special handling
4758 can generally do it in elf_backend_final_write_processing(),
4759 unless they need the information earlier than the final write.
4760 Such need can generally be supplied by replacing the tests for
4761 e_machine with the conditions used to determine it. */
4763 i_ehdrp->e_machine = bed->elf_machine_code;
4766 i_ehdrp->e_version = bed->s->ev_current;
4767 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4769 /* No program header, for now. */
4770 i_ehdrp->e_phoff = 0;
4771 i_ehdrp->e_phentsize = 0;
4772 i_ehdrp->e_phnum = 0;
4774 /* Each bfd section is section header entry. */
4775 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4776 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4778 /* If we're building an executable, we'll need a program header table. */
4779 if (abfd->flags & EXEC_P)
4780 /* It all happens later. */
4784 i_ehdrp->e_phentsize = 0;
4786 i_ehdrp->e_phoff = 0;
4789 elf_tdata (abfd)->symtab_hdr.sh_name =
4790 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4791 elf_tdata (abfd)->strtab_hdr.sh_name =
4792 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4793 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4794 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4795 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4796 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4797 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4803 /* Assign file positions for all the reloc sections which are not part
4804 of the loadable file image. */
4807 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4810 unsigned int i, num_sec;
4811 Elf_Internal_Shdr **shdrpp;
4813 off = elf_tdata (abfd)->next_file_pos;
4815 num_sec = elf_numsections (abfd);
4816 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4818 Elf_Internal_Shdr *shdrp;
4821 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4822 && shdrp->sh_offset == -1)
4823 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4826 elf_tdata (abfd)->next_file_pos = off;
4830 _bfd_elf_write_object_contents (bfd *abfd)
4832 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4833 Elf_Internal_Ehdr *i_ehdrp;
4834 Elf_Internal_Shdr **i_shdrp;
4836 unsigned int count, num_sec;
4838 if (! abfd->output_has_begun
4839 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4842 i_shdrp = elf_elfsections (abfd);
4843 i_ehdrp = elf_elfheader (abfd);
4846 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4850 _bfd_elf_assign_file_positions_for_relocs (abfd);
4852 /* After writing the headers, we need to write the sections too... */
4853 num_sec = elf_numsections (abfd);
4854 for (count = 1; count < num_sec; count++)
4856 if (bed->elf_backend_section_processing)
4857 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4858 if (i_shdrp[count]->contents)
4860 bfd_size_type amt = i_shdrp[count]->sh_size;
4862 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4863 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4866 if (count == SHN_LORESERVE - 1)
4867 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4870 /* Write out the section header names. */
4871 if (elf_shstrtab (abfd) != NULL
4872 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4873 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
4876 if (bed->elf_backend_final_write_processing)
4877 (*bed->elf_backend_final_write_processing) (abfd,
4878 elf_tdata (abfd)->linker);
4880 if (!bed->s->write_shdrs_and_ehdr (abfd))
4883 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
4884 if (elf_tdata (abfd)->after_write_object_contents)
4885 return (*elf_tdata (abfd)->after_write_object_contents) (abfd);
4891 _bfd_elf_write_corefile_contents (bfd *abfd)
4893 /* Hopefully this can be done just like an object file. */
4894 return _bfd_elf_write_object_contents (abfd);
4897 /* Given a section, search the header to find them. */
4900 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4902 const struct elf_backend_data *bed;
4905 if (elf_section_data (asect) != NULL
4906 && elf_section_data (asect)->this_idx != 0)
4907 return elf_section_data (asect)->this_idx;
4909 if (bfd_is_abs_section (asect))
4911 else if (bfd_is_com_section (asect))
4913 else if (bfd_is_und_section (asect))
4918 bed = get_elf_backend_data (abfd);
4919 if (bed->elf_backend_section_from_bfd_section)
4923 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4928 bfd_set_error (bfd_error_nonrepresentable_section);
4933 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4937 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
4939 asymbol *asym_ptr = *asym_ptr_ptr;
4941 flagword flags = asym_ptr->flags;
4943 /* When gas creates relocations against local labels, it creates its
4944 own symbol for the section, but does put the symbol into the
4945 symbol chain, so udata is 0. When the linker is generating
4946 relocatable output, this section symbol may be for one of the
4947 input sections rather than the output section. */
4948 if (asym_ptr->udata.i == 0
4949 && (flags & BSF_SECTION_SYM)
4950 && asym_ptr->section)
4955 sec = asym_ptr->section;
4956 if (sec->owner != abfd && sec->output_section != NULL)
4957 sec = sec->output_section;
4958 if (sec->owner == abfd
4959 && (indx = sec->index) < elf_num_section_syms (abfd)
4960 && elf_section_syms (abfd)[indx] != NULL)
4961 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
4964 idx = asym_ptr->udata.i;
4968 /* This case can occur when using --strip-symbol on a symbol
4969 which is used in a relocation entry. */
4970 (*_bfd_error_handler)
4971 (_("%B: symbol `%s' required but not present"),
4972 abfd, bfd_asymbol_name (asym_ptr));
4973 bfd_set_error (bfd_error_no_symbols);
4980 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4981 (long) asym_ptr, asym_ptr->name, idx, flags,
4982 elf_symbol_flags (flags));
4990 /* Rewrite program header information. */
4993 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
4995 Elf_Internal_Ehdr *iehdr;
4996 struct elf_segment_map *map;
4997 struct elf_segment_map *map_first;
4998 struct elf_segment_map **pointer_to_map;
4999 Elf_Internal_Phdr *segment;
5002 unsigned int num_segments;
5003 bfd_boolean phdr_included = FALSE;
5004 bfd_vma maxpagesize;
5005 struct elf_segment_map *phdr_adjust_seg = NULL;
5006 unsigned int phdr_adjust_num = 0;
5007 const struct elf_backend_data *bed;
5009 bed = get_elf_backend_data (ibfd);
5010 iehdr = elf_elfheader (ibfd);
5013 pointer_to_map = &map_first;
5015 num_segments = elf_elfheader (ibfd)->e_phnum;
5016 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5018 /* Returns the end address of the segment + 1. */
5019 #define SEGMENT_END(segment, start) \
5020 (start + (segment->p_memsz > segment->p_filesz \
5021 ? segment->p_memsz : segment->p_filesz))
5023 #define SECTION_SIZE(section, segment) \
5024 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5025 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5026 ? section->size : 0)
5028 /* Returns TRUE if the given section is contained within
5029 the given segment. VMA addresses are compared. */
5030 #define IS_CONTAINED_BY_VMA(section, segment) \
5031 (section->vma >= segment->p_vaddr \
5032 && (section->vma + SECTION_SIZE (section, segment) \
5033 <= (SEGMENT_END (segment, segment->p_vaddr))))
5035 /* Returns TRUE if the given section is contained within
5036 the given segment. LMA addresses are compared. */
5037 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5038 (section->lma >= base \
5039 && (section->lma + SECTION_SIZE (section, segment) \
5040 <= SEGMENT_END (segment, base)))
5042 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5043 #define IS_COREFILE_NOTE(p, s) \
5044 (p->p_type == PT_NOTE \
5045 && bfd_get_format (ibfd) == bfd_core \
5046 && s->vma == 0 && s->lma == 0 \
5047 && (bfd_vma) s->filepos >= p->p_offset \
5048 && ((bfd_vma) s->filepos + s->size \
5049 <= p->p_offset + p->p_filesz))
5051 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5052 linker, which generates a PT_INTERP section with p_vaddr and
5053 p_memsz set to 0. */
5054 #define IS_SOLARIS_PT_INTERP(p, s) \
5056 && p->p_paddr == 0 \
5057 && p->p_memsz == 0 \
5058 && p->p_filesz > 0 \
5059 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5061 && (bfd_vma) s->filepos >= p->p_offset \
5062 && ((bfd_vma) s->filepos + s->size \
5063 <= p->p_offset + p->p_filesz))
5065 /* Decide if the given section should be included in the given segment.
5066 A section will be included if:
5067 1. It is within the address space of the segment -- we use the LMA
5068 if that is set for the segment and the VMA otherwise,
5069 2. It is an allocated segment,
5070 3. There is an output section associated with it,
5071 4. The section has not already been allocated to a previous segment.
5072 5. PT_GNU_STACK segments do not include any sections.
5073 6. PT_TLS segment includes only SHF_TLS sections.
5074 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5075 8. PT_DYNAMIC should not contain empty sections at the beginning
5076 (with the possible exception of .dynamic). */
5077 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5078 ((((segment->p_paddr \
5079 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5080 : IS_CONTAINED_BY_VMA (section, segment)) \
5081 && (section->flags & SEC_ALLOC) != 0) \
5082 || IS_COREFILE_NOTE (segment, section)) \
5083 && segment->p_type != PT_GNU_STACK \
5084 && (segment->p_type != PT_TLS \
5085 || (section->flags & SEC_THREAD_LOCAL)) \
5086 && (segment->p_type == PT_LOAD \
5087 || segment->p_type == PT_TLS \
5088 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5089 && (segment->p_type != PT_DYNAMIC \
5090 || SECTION_SIZE (section, segment) > 0 \
5091 || (segment->p_paddr \
5092 ? segment->p_paddr != section->lma \
5093 : segment->p_vaddr != section->vma) \
5094 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5096 && ! section->segment_mark)
5098 /* If the output section of a section in the input segment is NULL,
5099 it is removed from the corresponding output segment. */
5100 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5101 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5102 && section->output_section != NULL)
5104 /* Returns TRUE iff seg1 starts after the end of seg2. */
5105 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5106 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5108 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5109 their VMA address ranges and their LMA address ranges overlap.
5110 It is possible to have overlapping VMA ranges without overlapping LMA
5111 ranges. RedBoot images for example can have both .data and .bss mapped
5112 to the same VMA range, but with the .data section mapped to a different
5114 #define SEGMENT_OVERLAPS(seg1, seg2) \
5115 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5116 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5117 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5118 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5120 /* Initialise the segment mark field. */
5121 for (section = ibfd->sections; section != NULL; section = section->next)
5122 section->segment_mark = FALSE;
5124 /* Scan through the segments specified in the program header
5125 of the input BFD. For this first scan we look for overlaps
5126 in the loadable segments. These can be created by weird
5127 parameters to objcopy. Also, fix some solaris weirdness. */
5128 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5133 Elf_Internal_Phdr *segment2;
5135 if (segment->p_type == PT_INTERP)
5136 for (section = ibfd->sections; section; section = section->next)
5137 if (IS_SOLARIS_PT_INTERP (segment, section))
5139 /* Mininal change so that the normal section to segment
5140 assignment code will work. */
5141 segment->p_vaddr = section->vma;
5145 if (segment->p_type != PT_LOAD)
5148 /* Determine if this segment overlaps any previous segments. */
5149 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
5151 bfd_signed_vma extra_length;
5153 if (segment2->p_type != PT_LOAD
5154 || ! SEGMENT_OVERLAPS (segment, segment2))
5157 /* Merge the two segments together. */
5158 if (segment2->p_vaddr < segment->p_vaddr)
5160 /* Extend SEGMENT2 to include SEGMENT and then delete
5163 SEGMENT_END (segment, segment->p_vaddr)
5164 - SEGMENT_END (segment2, segment2->p_vaddr);
5166 if (extra_length > 0)
5168 segment2->p_memsz += extra_length;
5169 segment2->p_filesz += extra_length;
5172 segment->p_type = PT_NULL;
5174 /* Since we have deleted P we must restart the outer loop. */
5176 segment = elf_tdata (ibfd)->phdr;
5181 /* Extend SEGMENT to include SEGMENT2 and then delete
5184 SEGMENT_END (segment2, segment2->p_vaddr)
5185 - SEGMENT_END (segment, segment->p_vaddr);
5187 if (extra_length > 0)
5189 segment->p_memsz += extra_length;
5190 segment->p_filesz += extra_length;
5193 segment2->p_type = PT_NULL;
5198 /* The second scan attempts to assign sections to segments. */
5199 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5203 unsigned int section_count;
5204 asection ** sections;
5205 asection * output_section;
5207 bfd_vma matching_lma;
5208 bfd_vma suggested_lma;
5211 asection * first_section;
5213 if (segment->p_type == PT_NULL)
5216 first_section = NULL;
5217 /* Compute how many sections might be placed into this segment. */
5218 for (section = ibfd->sections, section_count = 0;
5220 section = section->next)
5222 /* Find the first section in the input segment, which may be
5223 removed from the corresponding output segment. */
5224 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5226 if (first_section == NULL)
5227 first_section = section;
5228 if (section->output_section != NULL)
5233 /* Allocate a segment map big enough to contain
5234 all of the sections we have selected. */
5235 amt = sizeof (struct elf_segment_map);
5236 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5237 map = bfd_zalloc (obfd, amt);
5241 /* Initialise the fields of the segment map. Default to
5242 using the physical address of the segment in the input BFD. */
5244 map->p_type = segment->p_type;
5245 map->p_flags = segment->p_flags;
5246 map->p_flags_valid = 1;
5248 /* If the first section in the input segment is removed, there is
5249 no need to preserve segment physical address in the corresponding
5251 if (!first_section || first_section->output_section != NULL)
5253 map->p_paddr = segment->p_paddr;
5254 map->p_paddr_valid = 1;
5257 /* Determine if this segment contains the ELF file header
5258 and if it contains the program headers themselves. */
5259 map->includes_filehdr = (segment->p_offset == 0
5260 && segment->p_filesz >= iehdr->e_ehsize);
5262 map->includes_phdrs = 0;
5264 if (! phdr_included || segment->p_type != PT_LOAD)
5266 map->includes_phdrs =
5267 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5268 && (segment->p_offset + segment->p_filesz
5269 >= ((bfd_vma) iehdr->e_phoff
5270 + iehdr->e_phnum * iehdr->e_phentsize)));
5272 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5273 phdr_included = TRUE;
5276 if (section_count == 0)
5278 /* Special segments, such as the PT_PHDR segment, may contain
5279 no sections, but ordinary, loadable segments should contain
5280 something. They are allowed by the ELF spec however, so only
5281 a warning is produced. */
5282 if (segment->p_type == PT_LOAD)
5283 (*_bfd_error_handler)
5284 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5288 *pointer_to_map = map;
5289 pointer_to_map = &map->next;
5294 /* Now scan the sections in the input BFD again and attempt
5295 to add their corresponding output sections to the segment map.
5296 The problem here is how to handle an output section which has
5297 been moved (ie had its LMA changed). There are four possibilities:
5299 1. None of the sections have been moved.
5300 In this case we can continue to use the segment LMA from the
5303 2. All of the sections have been moved by the same amount.
5304 In this case we can change the segment's LMA to match the LMA
5305 of the first section.
5307 3. Some of the sections have been moved, others have not.
5308 In this case those sections which have not been moved can be
5309 placed in the current segment which will have to have its size,
5310 and possibly its LMA changed, and a new segment or segments will
5311 have to be created to contain the other sections.
5313 4. The sections have been moved, but not by the same amount.
5314 In this case we can change the segment's LMA to match the LMA
5315 of the first section and we will have to create a new segment
5316 or segments to contain the other sections.
5318 In order to save time, we allocate an array to hold the section
5319 pointers that we are interested in. As these sections get assigned
5320 to a segment, they are removed from this array. */
5322 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5323 to work around this long long bug. */
5324 sections = bfd_malloc2 (section_count, sizeof (asection *));
5325 if (sections == NULL)
5328 /* Step One: Scan for segment vs section LMA conflicts.
5329 Also add the sections to the section array allocated above.
5330 Also add the sections to the current segment. In the common
5331 case, where the sections have not been moved, this means that
5332 we have completely filled the segment, and there is nothing
5338 for (j = 0, section = ibfd->sections;
5340 section = section->next)
5342 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5344 output_section = section->output_section;
5346 sections[j ++] = section;
5348 /* The Solaris native linker always sets p_paddr to 0.
5349 We try to catch that case here, and set it to the
5350 correct value. Note - some backends require that
5351 p_paddr be left as zero. */
5352 if (segment->p_paddr == 0
5353 && segment->p_vaddr != 0
5354 && (! bed->want_p_paddr_set_to_zero)
5356 && output_section->lma != 0
5357 && (output_section->vma == (segment->p_vaddr
5358 + (map->includes_filehdr
5361 + (map->includes_phdrs
5363 * iehdr->e_phentsize)
5365 map->p_paddr = segment->p_vaddr;
5367 /* Match up the physical address of the segment with the
5368 LMA address of the output section. */
5369 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5370 || IS_COREFILE_NOTE (segment, section)
5371 || (bed->want_p_paddr_set_to_zero &&
5372 IS_CONTAINED_BY_VMA (output_section, segment)))
5374 if (matching_lma == 0 || output_section->lma < matching_lma)
5375 matching_lma = output_section->lma;
5377 /* We assume that if the section fits within the segment
5378 then it does not overlap any other section within that
5380 map->sections[isec ++] = output_section;
5382 else if (suggested_lma == 0)
5383 suggested_lma = output_section->lma;
5387 BFD_ASSERT (j == section_count);
5389 /* Step Two: Adjust the physical address of the current segment,
5391 if (isec == section_count)
5393 /* All of the sections fitted within the segment as currently
5394 specified. This is the default case. Add the segment to
5395 the list of built segments and carry on to process the next
5396 program header in the input BFD. */
5397 map->count = section_count;
5398 *pointer_to_map = map;
5399 pointer_to_map = &map->next;
5401 if (matching_lma != map->p_paddr
5402 && !map->includes_filehdr && !map->includes_phdrs)
5403 /* There is some padding before the first section in the
5404 segment. So, we must account for that in the output
5406 map->p_vaddr_offset = matching_lma - map->p_paddr;
5413 if (matching_lma != 0)
5415 /* At least one section fits inside the current segment.
5416 Keep it, but modify its physical address to match the
5417 LMA of the first section that fitted. */
5418 map->p_paddr = matching_lma;
5422 /* None of the sections fitted inside the current segment.
5423 Change the current segment's physical address to match
5424 the LMA of the first section. */
5425 map->p_paddr = suggested_lma;
5428 /* Offset the segment physical address from the lma
5429 to allow for space taken up by elf headers. */
5430 if (map->includes_filehdr)
5431 map->p_paddr -= iehdr->e_ehsize;
5433 if (map->includes_phdrs)
5435 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5437 /* iehdr->e_phnum is just an estimate of the number
5438 of program headers that we will need. Make a note
5439 here of the number we used and the segment we chose
5440 to hold these headers, so that we can adjust the
5441 offset when we know the correct value. */
5442 phdr_adjust_num = iehdr->e_phnum;
5443 phdr_adjust_seg = map;
5447 /* Step Three: Loop over the sections again, this time assigning
5448 those that fit to the current segment and removing them from the
5449 sections array; but making sure not to leave large gaps. Once all
5450 possible sections have been assigned to the current segment it is
5451 added to the list of built segments and if sections still remain
5452 to be assigned, a new segment is constructed before repeating
5460 /* Fill the current segment with sections that fit. */
5461 for (j = 0; j < section_count; j++)
5463 section = sections[j];
5465 if (section == NULL)
5468 output_section = section->output_section;
5470 BFD_ASSERT (output_section != NULL);
5472 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5473 || IS_COREFILE_NOTE (segment, section))
5475 if (map->count == 0)
5477 /* If the first section in a segment does not start at
5478 the beginning of the segment, then something is
5480 if (output_section->lma !=
5482 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5483 + (map->includes_phdrs
5484 ? iehdr->e_phnum * iehdr->e_phentsize
5490 asection * prev_sec;
5492 prev_sec = map->sections[map->count - 1];
5494 /* If the gap between the end of the previous section
5495 and the start of this section is more than
5496 maxpagesize then we need to start a new segment. */
5497 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5499 < BFD_ALIGN (output_section->lma, maxpagesize))
5500 || ((prev_sec->lma + prev_sec->size)
5501 > output_section->lma))
5503 if (suggested_lma == 0)
5504 suggested_lma = output_section->lma;
5510 map->sections[map->count++] = output_section;
5513 section->segment_mark = TRUE;
5515 else if (suggested_lma == 0)
5516 suggested_lma = output_section->lma;
5519 BFD_ASSERT (map->count > 0);
5521 /* Add the current segment to the list of built segments. */
5522 *pointer_to_map = map;
5523 pointer_to_map = &map->next;
5525 if (isec < section_count)
5527 /* We still have not allocated all of the sections to
5528 segments. Create a new segment here, initialise it
5529 and carry on looping. */
5530 amt = sizeof (struct elf_segment_map);
5531 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5532 map = bfd_alloc (obfd, amt);
5539 /* Initialise the fields of the segment map. Set the physical
5540 physical address to the LMA of the first section that has
5541 not yet been assigned. */
5543 map->p_type = segment->p_type;
5544 map->p_flags = segment->p_flags;
5545 map->p_flags_valid = 1;
5546 map->p_paddr = suggested_lma;
5547 map->p_paddr_valid = 1;
5548 map->includes_filehdr = 0;
5549 map->includes_phdrs = 0;
5552 while (isec < section_count);
5557 /* The Solaris linker creates program headers in which all the
5558 p_paddr fields are zero. When we try to objcopy or strip such a
5559 file, we get confused. Check for this case, and if we find it
5560 reset the p_paddr_valid fields. */
5561 for (map = map_first; map != NULL; map = map->next)
5562 if (map->p_paddr != 0)
5565 for (map = map_first; map != NULL; map = map->next)
5566 map->p_paddr_valid = 0;
5568 elf_tdata (obfd)->segment_map = map_first;
5570 /* If we had to estimate the number of program headers that were
5571 going to be needed, then check our estimate now and adjust
5572 the offset if necessary. */
5573 if (phdr_adjust_seg != NULL)
5577 for (count = 0, map = map_first; map != NULL; map = map->next)
5580 if (count > phdr_adjust_num)
5581 phdr_adjust_seg->p_paddr
5582 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5587 #undef IS_CONTAINED_BY_VMA
5588 #undef IS_CONTAINED_BY_LMA
5589 #undef IS_COREFILE_NOTE
5590 #undef IS_SOLARIS_PT_INTERP
5591 #undef IS_SECTION_IN_INPUT_SEGMENT
5592 #undef INCLUDE_SECTION_IN_SEGMENT
5593 #undef SEGMENT_AFTER_SEGMENT
5594 #undef SEGMENT_OVERLAPS
5598 /* Copy ELF program header information. */
5601 copy_elf_program_header (bfd *ibfd, bfd *obfd)
5603 Elf_Internal_Ehdr *iehdr;
5604 struct elf_segment_map *map;
5605 struct elf_segment_map *map_first;
5606 struct elf_segment_map **pointer_to_map;
5607 Elf_Internal_Phdr *segment;
5609 unsigned int num_segments;
5610 bfd_boolean phdr_included = FALSE;
5612 iehdr = elf_elfheader (ibfd);
5615 pointer_to_map = &map_first;
5617 num_segments = elf_elfheader (ibfd)->e_phnum;
5618 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5623 unsigned int section_count;
5625 Elf_Internal_Shdr *this_hdr;
5626 asection *first_section = NULL;
5627 asection *lowest_section = NULL;
5629 /* FIXME: Do we need to copy PT_NULL segment? */
5630 if (segment->p_type == PT_NULL)
5633 /* Compute how many sections are in this segment. */
5634 for (section = ibfd->sections, section_count = 0;
5636 section = section->next)
5638 this_hdr = &(elf_section_data(section)->this_hdr);
5639 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5642 first_section = lowest_section = section;
5643 if (section->lma < lowest_section->lma)
5644 lowest_section = section;
5649 /* Allocate a segment map big enough to contain
5650 all of the sections we have selected. */
5651 amt = sizeof (struct elf_segment_map);
5652 if (section_count != 0)
5653 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5654 map = bfd_zalloc (obfd, amt);
5658 /* Initialize the fields of the output segment map with the
5661 map->p_type = segment->p_type;
5662 map->p_flags = segment->p_flags;
5663 map->p_flags_valid = 1;
5664 map->p_paddr = segment->p_paddr;
5665 map->p_paddr_valid = 1;
5666 map->p_align = segment->p_align;
5667 map->p_align_valid = 1;
5668 map->p_vaddr_offset = 0;
5670 /* Determine if this segment contains the ELF file header
5671 and if it contains the program headers themselves. */
5672 map->includes_filehdr = (segment->p_offset == 0
5673 && segment->p_filesz >= iehdr->e_ehsize);
5675 map->includes_phdrs = 0;
5676 if (! phdr_included || segment->p_type != PT_LOAD)
5678 map->includes_phdrs =
5679 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5680 && (segment->p_offset + segment->p_filesz
5681 >= ((bfd_vma) iehdr->e_phoff
5682 + iehdr->e_phnum * iehdr->e_phentsize)));
5684 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5685 phdr_included = TRUE;
5688 if (!map->includes_phdrs && !map->includes_filehdr)
5689 /* There is some other padding before the first section. */
5690 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
5691 - segment->p_paddr);
5693 if (section_count != 0)
5695 unsigned int isec = 0;
5697 for (section = first_section;
5699 section = section->next)
5701 this_hdr = &(elf_section_data(section)->this_hdr);
5702 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5704 map->sections[isec++] = section->output_section;
5705 if (isec == section_count)
5711 map->count = section_count;
5712 *pointer_to_map = map;
5713 pointer_to_map = &map->next;
5716 elf_tdata (obfd)->segment_map = map_first;
5720 /* Copy private BFD data. This copies or rewrites ELF program header
5724 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5726 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5727 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5730 if (elf_tdata (ibfd)->phdr == NULL)
5733 if (ibfd->xvec == obfd->xvec)
5735 /* Check to see if any sections in the input BFD
5736 covered by ELF program header have changed. */
5737 Elf_Internal_Phdr *segment;
5738 asection *section, *osec;
5739 unsigned int i, num_segments;
5740 Elf_Internal_Shdr *this_hdr;
5742 /* Initialize the segment mark field. */
5743 for (section = obfd->sections; section != NULL;
5744 section = section->next)
5745 section->segment_mark = FALSE;
5747 num_segments = elf_elfheader (ibfd)->e_phnum;
5748 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5752 /* PR binutils/3535. The Solaris linker always sets the p_paddr
5753 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
5754 which severly confuses things, so always regenerate the segment
5755 map in this case. */
5756 if (segment->p_paddr == 0
5757 && segment->p_memsz == 0
5758 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
5761 for (section = ibfd->sections;
5762 section != NULL; section = section->next)
5764 /* We mark the output section so that we know it comes
5765 from the input BFD. */
5766 osec = section->output_section;
5768 osec->segment_mark = TRUE;
5770 /* Check if this section is covered by the segment. */
5771 this_hdr = &(elf_section_data(section)->this_hdr);
5772 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5774 /* FIXME: Check if its output section is changed or
5775 removed. What else do we need to check? */
5777 || section->flags != osec->flags
5778 || section->lma != osec->lma
5779 || section->vma != osec->vma
5780 || section->size != osec->size
5781 || section->rawsize != osec->rawsize
5782 || section->alignment_power != osec->alignment_power)
5788 /* Check to see if any output section do not come from the
5790 for (section = obfd->sections; section != NULL;
5791 section = section->next)
5793 if (section->segment_mark == FALSE)
5796 section->segment_mark = FALSE;
5799 return copy_elf_program_header (ibfd, obfd);
5803 return rewrite_elf_program_header (ibfd, obfd);
5806 /* Initialize private output section information from input section. */
5809 _bfd_elf_init_private_section_data (bfd *ibfd,
5813 struct bfd_link_info *link_info)
5816 Elf_Internal_Shdr *ihdr, *ohdr;
5817 bfd_boolean need_group = link_info == NULL || link_info->relocatable;
5819 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5820 || obfd->xvec->flavour != bfd_target_elf_flavour)
5823 /* Don't copy the output ELF section type from input if the
5824 output BFD section flags have been set to something different.
5825 elf_fake_sections will set ELF section type based on BFD
5827 if (elf_section_type (osec) == SHT_NULL
5828 && (osec->flags == isec->flags || !osec->flags))
5829 elf_section_type (osec) = elf_section_type (isec);
5831 /* FIXME: Is this correct for all OS/PROC specific flags? */
5832 elf_section_flags (osec) |= (elf_section_flags (isec)
5833 & (SHF_MASKOS | SHF_MASKPROC));
5835 /* Set things up for objcopy and relocatable link. The output
5836 SHT_GROUP section will have its elf_next_in_group pointing back
5837 to the input group members. Ignore linker created group section.
5838 See elfNN_ia64_object_p in elfxx-ia64.c. */
5841 if (elf_sec_group (isec) == NULL
5842 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
5844 if (elf_section_flags (isec) & SHF_GROUP)
5845 elf_section_flags (osec) |= SHF_GROUP;
5846 elf_next_in_group (osec) = elf_next_in_group (isec);
5847 elf_group_name (osec) = elf_group_name (isec);
5851 ihdr = &elf_section_data (isec)->this_hdr;
5853 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
5854 don't use the output section of the linked-to section since it
5855 may be NULL at this point. */
5856 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
5858 ohdr = &elf_section_data (osec)->this_hdr;
5859 ohdr->sh_flags |= SHF_LINK_ORDER;
5860 elf_linked_to_section (osec) = elf_linked_to_section (isec);
5863 osec->use_rela_p = isec->use_rela_p;
5868 /* Copy private section information. This copies over the entsize
5869 field, and sometimes the info field. */
5872 _bfd_elf_copy_private_section_data (bfd *ibfd,
5877 Elf_Internal_Shdr *ihdr, *ohdr;
5879 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5880 || obfd->xvec->flavour != bfd_target_elf_flavour)
5883 ihdr = &elf_section_data (isec)->this_hdr;
5884 ohdr = &elf_section_data (osec)->this_hdr;
5886 ohdr->sh_entsize = ihdr->sh_entsize;
5888 if (ihdr->sh_type == SHT_SYMTAB
5889 || ihdr->sh_type == SHT_DYNSYM
5890 || ihdr->sh_type == SHT_GNU_verneed
5891 || ihdr->sh_type == SHT_GNU_verdef)
5892 ohdr->sh_info = ihdr->sh_info;
5894 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
5898 /* Copy private header information. */
5901 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
5905 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5906 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5909 /* Copy over private BFD data if it has not already been copied.
5910 This must be done here, rather than in the copy_private_bfd_data
5911 entry point, because the latter is called after the section
5912 contents have been set, which means that the program headers have
5913 already been worked out. */
5914 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5916 if (! copy_private_bfd_data (ibfd, obfd))
5920 /* _bfd_elf_copy_private_section_data copied over the SHF_GROUP flag
5921 but this might be wrong if we deleted the group section. */
5922 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
5923 if (elf_section_type (isec) == SHT_GROUP
5924 && isec->output_section == NULL)
5926 asection *first = elf_next_in_group (isec);
5927 asection *s = first;
5930 if (s->output_section != NULL)
5932 elf_section_flags (s->output_section) &= ~SHF_GROUP;
5933 elf_group_name (s->output_section) = NULL;
5935 s = elf_next_in_group (s);
5944 /* Copy private symbol information. If this symbol is in a section
5945 which we did not map into a BFD section, try to map the section
5946 index correctly. We use special macro definitions for the mapped
5947 section indices; these definitions are interpreted by the
5948 swap_out_syms function. */
5950 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5951 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5952 #define MAP_STRTAB (SHN_HIOS + 3)
5953 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5954 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5957 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
5962 elf_symbol_type *isym, *osym;
5964 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5965 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5968 isym = elf_symbol_from (ibfd, isymarg);
5969 osym = elf_symbol_from (obfd, osymarg);
5973 && bfd_is_abs_section (isym->symbol.section))
5977 shndx = isym->internal_elf_sym.st_shndx;
5978 if (shndx == elf_onesymtab (ibfd))
5979 shndx = MAP_ONESYMTAB;
5980 else if (shndx == elf_dynsymtab (ibfd))
5981 shndx = MAP_DYNSYMTAB;
5982 else if (shndx == elf_tdata (ibfd)->strtab_section)
5984 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5985 shndx = MAP_SHSTRTAB;
5986 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5987 shndx = MAP_SYM_SHNDX;
5988 osym->internal_elf_sym.st_shndx = shndx;
5994 /* Swap out the symbols. */
5997 swap_out_syms (bfd *abfd,
5998 struct bfd_strtab_hash **sttp,
6001 const struct elf_backend_data *bed;
6004 struct bfd_strtab_hash *stt;
6005 Elf_Internal_Shdr *symtab_hdr;
6006 Elf_Internal_Shdr *symtab_shndx_hdr;
6007 Elf_Internal_Shdr *symstrtab_hdr;
6008 bfd_byte *outbound_syms;
6009 bfd_byte *outbound_shndx;
6012 bfd_boolean name_local_sections;
6014 if (!elf_map_symbols (abfd))
6017 /* Dump out the symtabs. */
6018 stt = _bfd_elf_stringtab_init ();
6022 bed = get_elf_backend_data (abfd);
6023 symcount = bfd_get_symcount (abfd);
6024 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6025 symtab_hdr->sh_type = SHT_SYMTAB;
6026 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6027 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6028 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
6029 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
6031 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6032 symstrtab_hdr->sh_type = SHT_STRTAB;
6034 outbound_syms = bfd_alloc2 (abfd, 1 + symcount, bed->s->sizeof_sym);
6035 if (outbound_syms == NULL)
6037 _bfd_stringtab_free (stt);
6040 symtab_hdr->contents = outbound_syms;
6042 outbound_shndx = NULL;
6043 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6044 if (symtab_shndx_hdr->sh_name != 0)
6046 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6047 outbound_shndx = bfd_zalloc2 (abfd, 1 + symcount,
6048 sizeof (Elf_External_Sym_Shndx));
6049 if (outbound_shndx == NULL)
6051 _bfd_stringtab_free (stt);
6055 symtab_shndx_hdr->contents = outbound_shndx;
6056 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6057 symtab_shndx_hdr->sh_size = amt;
6058 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6059 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6062 /* Now generate the data (for "contents"). */
6064 /* Fill in zeroth symbol and swap it out. */
6065 Elf_Internal_Sym sym;
6071 sym.st_shndx = SHN_UNDEF;
6072 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6073 outbound_syms += bed->s->sizeof_sym;
6074 if (outbound_shndx != NULL)
6075 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6079 = (bed->elf_backend_name_local_section_symbols
6080 && bed->elf_backend_name_local_section_symbols (abfd));
6082 syms = bfd_get_outsymbols (abfd);
6083 for (idx = 0; idx < symcount; idx++)
6085 Elf_Internal_Sym sym;
6086 bfd_vma value = syms[idx]->value;
6087 elf_symbol_type *type_ptr;
6088 flagword flags = syms[idx]->flags;
6091 if (!name_local_sections
6092 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6094 /* Local section symbols have no name. */
6099 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6102 if (sym.st_name == (unsigned long) -1)
6104 _bfd_stringtab_free (stt);
6109 type_ptr = elf_symbol_from (abfd, syms[idx]);
6111 if ((flags & BSF_SECTION_SYM) == 0
6112 && bfd_is_com_section (syms[idx]->section))
6114 /* ELF common symbols put the alignment into the `value' field,
6115 and the size into the `size' field. This is backwards from
6116 how BFD handles it, so reverse it here. */
6117 sym.st_size = value;
6118 if (type_ptr == NULL
6119 || type_ptr->internal_elf_sym.st_value == 0)
6120 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6122 sym.st_value = type_ptr->internal_elf_sym.st_value;
6123 sym.st_shndx = _bfd_elf_section_from_bfd_section
6124 (abfd, syms[idx]->section);
6128 asection *sec = syms[idx]->section;
6131 if (sec->output_section)
6133 value += sec->output_offset;
6134 sec = sec->output_section;
6137 /* Don't add in the section vma for relocatable output. */
6138 if (! relocatable_p)
6140 sym.st_value = value;
6141 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6143 if (bfd_is_abs_section (sec)
6145 && type_ptr->internal_elf_sym.st_shndx != 0)
6147 /* This symbol is in a real ELF section which we did
6148 not create as a BFD section. Undo the mapping done
6149 by copy_private_symbol_data. */
6150 shndx = type_ptr->internal_elf_sym.st_shndx;
6154 shndx = elf_onesymtab (abfd);
6157 shndx = elf_dynsymtab (abfd);
6160 shndx = elf_tdata (abfd)->strtab_section;
6163 shndx = elf_tdata (abfd)->shstrtab_section;
6166 shndx = elf_tdata (abfd)->symtab_shndx_section;
6174 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6180 /* Writing this would be a hell of a lot easier if
6181 we had some decent documentation on bfd, and
6182 knew what to expect of the library, and what to
6183 demand of applications. For example, it
6184 appears that `objcopy' might not set the
6185 section of a symbol to be a section that is
6186 actually in the output file. */
6187 sec2 = bfd_get_section_by_name (abfd, sec->name);
6190 _bfd_error_handler (_("\
6191 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6192 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6194 bfd_set_error (bfd_error_invalid_operation);
6195 _bfd_stringtab_free (stt);
6199 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6200 BFD_ASSERT (shndx != -1);
6204 sym.st_shndx = shndx;
6207 if ((flags & BSF_THREAD_LOCAL) != 0)
6209 else if ((flags & BSF_FUNCTION) != 0)
6211 else if ((flags & BSF_OBJECT) != 0)
6213 else if ((flags & BSF_RELC) != 0)
6215 else if ((flags & BSF_SRELC) != 0)
6220 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6223 /* Processor-specific types. */
6224 if (type_ptr != NULL
6225 && bed->elf_backend_get_symbol_type)
6226 type = ((*bed->elf_backend_get_symbol_type)
6227 (&type_ptr->internal_elf_sym, type));
6229 if (flags & BSF_SECTION_SYM)
6231 if (flags & BSF_GLOBAL)
6232 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6234 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6236 else if (bfd_is_com_section (syms[idx]->section))
6237 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6238 else if (bfd_is_und_section (syms[idx]->section))
6239 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6243 else if (flags & BSF_FILE)
6244 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6247 int bind = STB_LOCAL;
6249 if (flags & BSF_LOCAL)
6251 else if (flags & BSF_WEAK)
6253 else if (flags & BSF_GLOBAL)
6256 sym.st_info = ELF_ST_INFO (bind, type);
6259 if (type_ptr != NULL)
6260 sym.st_other = type_ptr->internal_elf_sym.st_other;
6264 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6265 outbound_syms += bed->s->sizeof_sym;
6266 if (outbound_shndx != NULL)
6267 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6271 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6272 symstrtab_hdr->sh_type = SHT_STRTAB;
6274 symstrtab_hdr->sh_flags = 0;
6275 symstrtab_hdr->sh_addr = 0;
6276 symstrtab_hdr->sh_entsize = 0;
6277 symstrtab_hdr->sh_link = 0;
6278 symstrtab_hdr->sh_info = 0;
6279 symstrtab_hdr->sh_addralign = 1;
6284 /* Return the number of bytes required to hold the symtab vector.
6286 Note that we base it on the count plus 1, since we will null terminate
6287 the vector allocated based on this size. However, the ELF symbol table
6288 always has a dummy entry as symbol #0, so it ends up even. */
6291 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6295 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6297 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6298 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6300 symtab_size -= sizeof (asymbol *);
6306 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6310 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6312 if (elf_dynsymtab (abfd) == 0)
6314 bfd_set_error (bfd_error_invalid_operation);
6318 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6319 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6321 symtab_size -= sizeof (asymbol *);
6327 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6330 return (asect->reloc_count + 1) * sizeof (arelent *);
6333 /* Canonicalize the relocs. */
6336 _bfd_elf_canonicalize_reloc (bfd *abfd,
6343 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6345 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6348 tblptr = section->relocation;
6349 for (i = 0; i < section->reloc_count; i++)
6350 *relptr++ = tblptr++;
6354 return section->reloc_count;
6358 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6360 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6361 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6364 bfd_get_symcount (abfd) = symcount;
6369 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6370 asymbol **allocation)
6372 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6373 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6376 bfd_get_dynamic_symcount (abfd) = symcount;
6380 /* Return the size required for the dynamic reloc entries. Any loadable
6381 section that was actually installed in the BFD, and has type SHT_REL
6382 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6383 dynamic reloc section. */
6386 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6391 if (elf_dynsymtab (abfd) == 0)
6393 bfd_set_error (bfd_error_invalid_operation);
6397 ret = sizeof (arelent *);
6398 for (s = abfd->sections; s != NULL; s = s->next)
6399 if ((s->flags & SEC_LOAD) != 0
6400 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6401 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6402 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6403 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6404 * sizeof (arelent *));
6409 /* Canonicalize the dynamic relocation entries. Note that we return the
6410 dynamic relocations as a single block, although they are actually
6411 associated with particular sections; the interface, which was
6412 designed for SunOS style shared libraries, expects that there is only
6413 one set of dynamic relocs. Any loadable section that was actually
6414 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6415 dynamic symbol table, is considered to be a dynamic reloc section. */
6418 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6422 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6426 if (elf_dynsymtab (abfd) == 0)
6428 bfd_set_error (bfd_error_invalid_operation);
6432 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6434 for (s = abfd->sections; s != NULL; s = s->next)
6436 if ((s->flags & SEC_LOAD) != 0
6437 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6438 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6439 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6444 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6446 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6448 for (i = 0; i < count; i++)
6459 /* Read in the version information. */
6462 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6464 bfd_byte *contents = NULL;
6465 unsigned int freeidx = 0;
6467 if (elf_dynverref (abfd) != 0)
6469 Elf_Internal_Shdr *hdr;
6470 Elf_External_Verneed *everneed;
6471 Elf_Internal_Verneed *iverneed;
6473 bfd_byte *contents_end;
6475 hdr = &elf_tdata (abfd)->dynverref_hdr;
6477 elf_tdata (abfd)->verref = bfd_zalloc2 (abfd, hdr->sh_info,
6478 sizeof (Elf_Internal_Verneed));
6479 if (elf_tdata (abfd)->verref == NULL)
6482 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6484 contents = bfd_malloc (hdr->sh_size);
6485 if (contents == NULL)
6487 error_return_verref:
6488 elf_tdata (abfd)->verref = NULL;
6489 elf_tdata (abfd)->cverrefs = 0;
6492 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6493 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6494 goto error_return_verref;
6496 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6497 goto error_return_verref;
6499 BFD_ASSERT (sizeof (Elf_External_Verneed)
6500 == sizeof (Elf_External_Vernaux));
6501 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6502 everneed = (Elf_External_Verneed *) contents;
6503 iverneed = elf_tdata (abfd)->verref;
6504 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6506 Elf_External_Vernaux *evernaux;
6507 Elf_Internal_Vernaux *ivernaux;
6510 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6512 iverneed->vn_bfd = abfd;
6514 iverneed->vn_filename =
6515 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6517 if (iverneed->vn_filename == NULL)
6518 goto error_return_verref;
6520 if (iverneed->vn_cnt == 0)
6521 iverneed->vn_auxptr = NULL;
6524 iverneed->vn_auxptr = bfd_alloc2 (abfd, iverneed->vn_cnt,
6525 sizeof (Elf_Internal_Vernaux));
6526 if (iverneed->vn_auxptr == NULL)
6527 goto error_return_verref;
6530 if (iverneed->vn_aux
6531 > (size_t) (contents_end - (bfd_byte *) everneed))
6532 goto error_return_verref;
6534 evernaux = ((Elf_External_Vernaux *)
6535 ((bfd_byte *) everneed + iverneed->vn_aux));
6536 ivernaux = iverneed->vn_auxptr;
6537 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6539 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6541 ivernaux->vna_nodename =
6542 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6543 ivernaux->vna_name);
6544 if (ivernaux->vna_nodename == NULL)
6545 goto error_return_verref;
6547 if (j + 1 < iverneed->vn_cnt)
6548 ivernaux->vna_nextptr = ivernaux + 1;
6550 ivernaux->vna_nextptr = NULL;
6552 if (ivernaux->vna_next
6553 > (size_t) (contents_end - (bfd_byte *) evernaux))
6554 goto error_return_verref;
6556 evernaux = ((Elf_External_Vernaux *)
6557 ((bfd_byte *) evernaux + ivernaux->vna_next));
6559 if (ivernaux->vna_other > freeidx)
6560 freeidx = ivernaux->vna_other;
6563 if (i + 1 < hdr->sh_info)
6564 iverneed->vn_nextref = iverneed + 1;
6566 iverneed->vn_nextref = NULL;
6568 if (iverneed->vn_next
6569 > (size_t) (contents_end - (bfd_byte *) everneed))
6570 goto error_return_verref;
6572 everneed = ((Elf_External_Verneed *)
6573 ((bfd_byte *) everneed + iverneed->vn_next));
6580 if (elf_dynverdef (abfd) != 0)
6582 Elf_Internal_Shdr *hdr;
6583 Elf_External_Verdef *everdef;
6584 Elf_Internal_Verdef *iverdef;
6585 Elf_Internal_Verdef *iverdefarr;
6586 Elf_Internal_Verdef iverdefmem;
6588 unsigned int maxidx;
6589 bfd_byte *contents_end_def, *contents_end_aux;
6591 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6593 contents = bfd_malloc (hdr->sh_size);
6594 if (contents == NULL)
6596 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6597 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6600 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
6603 BFD_ASSERT (sizeof (Elf_External_Verdef)
6604 >= sizeof (Elf_External_Verdaux));
6605 contents_end_def = contents + hdr->sh_size
6606 - sizeof (Elf_External_Verdef);
6607 contents_end_aux = contents + hdr->sh_size
6608 - sizeof (Elf_External_Verdaux);
6610 /* We know the number of entries in the section but not the maximum
6611 index. Therefore we have to run through all entries and find
6613 everdef = (Elf_External_Verdef *) contents;
6615 for (i = 0; i < hdr->sh_info; ++i)
6617 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6619 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6620 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6622 if (iverdefmem.vd_next
6623 > (size_t) (contents_end_def - (bfd_byte *) everdef))
6626 everdef = ((Elf_External_Verdef *)
6627 ((bfd_byte *) everdef + iverdefmem.vd_next));
6630 if (default_imported_symver)
6632 if (freeidx > maxidx)
6637 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, maxidx,
6638 sizeof (Elf_Internal_Verdef));
6639 if (elf_tdata (abfd)->verdef == NULL)
6642 elf_tdata (abfd)->cverdefs = maxidx;
6644 everdef = (Elf_External_Verdef *) contents;
6645 iverdefarr = elf_tdata (abfd)->verdef;
6646 for (i = 0; i < hdr->sh_info; i++)
6648 Elf_External_Verdaux *everdaux;
6649 Elf_Internal_Verdaux *iverdaux;
6652 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6654 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
6656 error_return_verdef:
6657 elf_tdata (abfd)->verdef = NULL;
6658 elf_tdata (abfd)->cverdefs = 0;
6662 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6663 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6665 iverdef->vd_bfd = abfd;
6667 if (iverdef->vd_cnt == 0)
6668 iverdef->vd_auxptr = NULL;
6671 iverdef->vd_auxptr = bfd_alloc2 (abfd, iverdef->vd_cnt,
6672 sizeof (Elf_Internal_Verdaux));
6673 if (iverdef->vd_auxptr == NULL)
6674 goto error_return_verdef;
6678 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
6679 goto error_return_verdef;
6681 everdaux = ((Elf_External_Verdaux *)
6682 ((bfd_byte *) everdef + iverdef->vd_aux));
6683 iverdaux = iverdef->vd_auxptr;
6684 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6686 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6688 iverdaux->vda_nodename =
6689 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6690 iverdaux->vda_name);
6691 if (iverdaux->vda_nodename == NULL)
6692 goto error_return_verdef;
6694 if (j + 1 < iverdef->vd_cnt)
6695 iverdaux->vda_nextptr = iverdaux + 1;
6697 iverdaux->vda_nextptr = NULL;
6699 if (iverdaux->vda_next
6700 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
6701 goto error_return_verdef;
6703 everdaux = ((Elf_External_Verdaux *)
6704 ((bfd_byte *) everdaux + iverdaux->vda_next));
6707 if (iverdef->vd_cnt)
6708 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6710 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
6711 iverdef->vd_nextdef = iverdef + 1;
6713 iverdef->vd_nextdef = NULL;
6715 everdef = ((Elf_External_Verdef *)
6716 ((bfd_byte *) everdef + iverdef->vd_next));
6722 else if (default_imported_symver)
6729 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, freeidx,
6730 sizeof (Elf_Internal_Verdef));
6731 if (elf_tdata (abfd)->verdef == NULL)
6734 elf_tdata (abfd)->cverdefs = freeidx;
6737 /* Create a default version based on the soname. */
6738 if (default_imported_symver)
6740 Elf_Internal_Verdef *iverdef;
6741 Elf_Internal_Verdaux *iverdaux;
6743 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6745 iverdef->vd_version = VER_DEF_CURRENT;
6746 iverdef->vd_flags = 0;
6747 iverdef->vd_ndx = freeidx;
6748 iverdef->vd_cnt = 1;
6750 iverdef->vd_bfd = abfd;
6752 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6753 if (iverdef->vd_nodename == NULL)
6754 goto error_return_verdef;
6755 iverdef->vd_nextdef = NULL;
6756 iverdef->vd_auxptr = bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
6757 if (iverdef->vd_auxptr == NULL)
6758 goto error_return_verdef;
6760 iverdaux = iverdef->vd_auxptr;
6761 iverdaux->vda_nodename = iverdef->vd_nodename;
6762 iverdaux->vda_nextptr = NULL;
6768 if (contents != NULL)
6774 _bfd_elf_make_empty_symbol (bfd *abfd)
6776 elf_symbol_type *newsym;
6777 bfd_size_type amt = sizeof (elf_symbol_type);
6779 newsym = bfd_zalloc (abfd, amt);
6784 newsym->symbol.the_bfd = abfd;
6785 return &newsym->symbol;
6790 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
6794 bfd_symbol_info (symbol, ret);
6797 /* Return whether a symbol name implies a local symbol. Most targets
6798 use this function for the is_local_label_name entry point, but some
6802 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
6805 /* Normal local symbols start with ``.L''. */
6806 if (name[0] == '.' && name[1] == 'L')
6809 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6810 DWARF debugging symbols starting with ``..''. */
6811 if (name[0] == '.' && name[1] == '.')
6814 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6815 emitting DWARF debugging output. I suspect this is actually a
6816 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6817 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6818 underscore to be emitted on some ELF targets). For ease of use,
6819 we treat such symbols as local. */
6820 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6827 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6828 asymbol *symbol ATTRIBUTE_UNUSED)
6835 _bfd_elf_set_arch_mach (bfd *abfd,
6836 enum bfd_architecture arch,
6837 unsigned long machine)
6839 /* If this isn't the right architecture for this backend, and this
6840 isn't the generic backend, fail. */
6841 if (arch != get_elf_backend_data (abfd)->arch
6842 && arch != bfd_arch_unknown
6843 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6846 return bfd_default_set_arch_mach (abfd, arch, machine);
6849 /* Find the function to a particular section and offset,
6850 for error reporting. */
6853 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6857 const char **filename_ptr,
6858 const char **functionname_ptr)
6860 const char *filename;
6861 asymbol *func, *file;
6864 /* ??? Given multiple file symbols, it is impossible to reliably
6865 choose the right file name for global symbols. File symbols are
6866 local symbols, and thus all file symbols must sort before any
6867 global symbols. The ELF spec may be interpreted to say that a
6868 file symbol must sort before other local symbols, but currently
6869 ld -r doesn't do this. So, for ld -r output, it is possible to
6870 make a better choice of file name for local symbols by ignoring
6871 file symbols appearing after a given local symbol. */
6872 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
6878 state = nothing_seen;
6880 for (p = symbols; *p != NULL; p++)
6884 q = (elf_symbol_type *) *p;
6886 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6892 if (state == symbol_seen)
6893 state = file_after_symbol_seen;
6897 if (bfd_get_section (&q->symbol) == section
6898 && q->symbol.value >= low_func
6899 && q->symbol.value <= offset)
6901 func = (asymbol *) q;
6902 low_func = q->symbol.value;
6905 && (ELF_ST_BIND (q->internal_elf_sym.st_info) == STB_LOCAL
6906 || state != file_after_symbol_seen))
6907 filename = bfd_asymbol_name (file);
6911 if (state == nothing_seen)
6912 state = symbol_seen;
6919 *filename_ptr = filename;
6920 if (functionname_ptr)
6921 *functionname_ptr = bfd_asymbol_name (func);
6926 /* Find the nearest line to a particular section and offset,
6927 for error reporting. */
6930 _bfd_elf_find_nearest_line (bfd *abfd,
6934 const char **filename_ptr,
6935 const char **functionname_ptr,
6936 unsigned int *line_ptr)
6940 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6941 filename_ptr, functionname_ptr,
6944 if (!*functionname_ptr)
6945 elf_find_function (abfd, section, symbols, offset,
6946 *filename_ptr ? NULL : filename_ptr,
6952 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6953 filename_ptr, functionname_ptr,
6955 &elf_tdata (abfd)->dwarf2_find_line_info))
6957 if (!*functionname_ptr)
6958 elf_find_function (abfd, section, symbols, offset,
6959 *filename_ptr ? NULL : filename_ptr,
6965 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6966 &found, filename_ptr,
6967 functionname_ptr, line_ptr,
6968 &elf_tdata (abfd)->line_info))
6970 if (found && (*functionname_ptr || *line_ptr))
6973 if (symbols == NULL)
6976 if (! elf_find_function (abfd, section, symbols, offset,
6977 filename_ptr, functionname_ptr))
6984 /* Find the line for a symbol. */
6987 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
6988 const char **filename_ptr, unsigned int *line_ptr)
6990 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
6991 filename_ptr, line_ptr, 0,
6992 &elf_tdata (abfd)->dwarf2_find_line_info);
6995 /* After a call to bfd_find_nearest_line, successive calls to
6996 bfd_find_inliner_info can be used to get source information about
6997 each level of function inlining that terminated at the address
6998 passed to bfd_find_nearest_line. Currently this is only supported
6999 for DWARF2 with appropriate DWARF3 extensions. */
7002 _bfd_elf_find_inliner_info (bfd *abfd,
7003 const char **filename_ptr,
7004 const char **functionname_ptr,
7005 unsigned int *line_ptr)
7008 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7009 functionname_ptr, line_ptr,
7010 & elf_tdata (abfd)->dwarf2_find_line_info);
7015 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
7017 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7018 int ret = bed->s->sizeof_ehdr;
7020 if (!info->relocatable)
7022 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
7024 if (phdr_size == (bfd_size_type) -1)
7026 struct elf_segment_map *m;
7029 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
7030 phdr_size += bed->s->sizeof_phdr;
7033 phdr_size = get_program_header_size (abfd, info);
7036 elf_tdata (abfd)->program_header_size = phdr_size;
7044 _bfd_elf_set_section_contents (bfd *abfd,
7046 const void *location,
7048 bfd_size_type count)
7050 Elf_Internal_Shdr *hdr;
7053 if (! abfd->output_has_begun
7054 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7057 hdr = &elf_section_data (section)->this_hdr;
7058 pos = hdr->sh_offset + offset;
7059 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7060 || bfd_bwrite (location, count, abfd) != count)
7067 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7068 arelent *cache_ptr ATTRIBUTE_UNUSED,
7069 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7074 /* Try to convert a non-ELF reloc into an ELF one. */
7077 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7079 /* Check whether we really have an ELF howto. */
7081 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7083 bfd_reloc_code_real_type code;
7084 reloc_howto_type *howto;
7086 /* Alien reloc: Try to determine its type to replace it with an
7087 equivalent ELF reloc. */
7089 if (areloc->howto->pc_relative)
7091 switch (areloc->howto->bitsize)
7094 code = BFD_RELOC_8_PCREL;
7097 code = BFD_RELOC_12_PCREL;
7100 code = BFD_RELOC_16_PCREL;
7103 code = BFD_RELOC_24_PCREL;
7106 code = BFD_RELOC_32_PCREL;
7109 code = BFD_RELOC_64_PCREL;
7115 howto = bfd_reloc_type_lookup (abfd, code);
7117 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7119 if (howto->pcrel_offset)
7120 areloc->addend += areloc->address;
7122 areloc->addend -= areloc->address; /* addend is unsigned!! */
7127 switch (areloc->howto->bitsize)
7133 code = BFD_RELOC_14;
7136 code = BFD_RELOC_16;
7139 code = BFD_RELOC_26;
7142 code = BFD_RELOC_32;
7145 code = BFD_RELOC_64;
7151 howto = bfd_reloc_type_lookup (abfd, code);
7155 areloc->howto = howto;
7163 (*_bfd_error_handler)
7164 (_("%B: unsupported relocation type %s"),
7165 abfd, areloc->howto->name);
7166 bfd_set_error (bfd_error_bad_value);
7171 _bfd_elf_close_and_cleanup (bfd *abfd)
7173 if (bfd_get_format (abfd) == bfd_object)
7175 if (elf_tdata (abfd) != NULL && elf_shstrtab (abfd) != NULL)
7176 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7177 _bfd_dwarf2_cleanup_debug_info (abfd);
7180 return _bfd_generic_close_and_cleanup (abfd);
7183 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7184 in the relocation's offset. Thus we cannot allow any sort of sanity
7185 range-checking to interfere. There is nothing else to do in processing
7188 bfd_reloc_status_type
7189 _bfd_elf_rel_vtable_reloc_fn
7190 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7191 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7192 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7193 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7195 return bfd_reloc_ok;
7198 /* Elf core file support. Much of this only works on native
7199 toolchains, since we rely on knowing the
7200 machine-dependent procfs structure in order to pick
7201 out details about the corefile. */
7203 #ifdef HAVE_SYS_PROCFS_H
7204 # include <sys/procfs.h>
7207 /* FIXME: this is kinda wrong, but it's what gdb wants. */
7210 elfcore_make_pid (bfd *abfd)
7212 return ((elf_tdata (abfd)->core_lwpid << 16)
7213 + (elf_tdata (abfd)->core_pid));
7216 /* If there isn't a section called NAME, make one, using
7217 data from SECT. Note, this function will generate a
7218 reference to NAME, so you shouldn't deallocate or
7222 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7226 if (bfd_get_section_by_name (abfd, name) != NULL)
7229 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
7233 sect2->size = sect->size;
7234 sect2->filepos = sect->filepos;
7235 sect2->alignment_power = sect->alignment_power;
7239 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7240 actually creates up to two pseudosections:
7241 - For the single-threaded case, a section named NAME, unless
7242 such a section already exists.
7243 - For the multi-threaded case, a section named "NAME/PID", where
7244 PID is elfcore_make_pid (abfd).
7245 Both pseudosections have identical contents. */
7247 _bfd_elfcore_make_pseudosection (bfd *abfd,
7253 char *threaded_name;
7257 /* Build the section name. */
7259 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7260 len = strlen (buf) + 1;
7261 threaded_name = bfd_alloc (abfd, len);
7262 if (threaded_name == NULL)
7264 memcpy (threaded_name, buf, len);
7266 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
7271 sect->filepos = filepos;
7272 sect->alignment_power = 2;
7274 return elfcore_maybe_make_sect (abfd, name, sect);
7277 /* prstatus_t exists on:
7279 linux 2.[01] + glibc
7283 #if defined (HAVE_PRSTATUS_T)
7286 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7291 if (note->descsz == sizeof (prstatus_t))
7295 size = sizeof (prstat.pr_reg);
7296 offset = offsetof (prstatus_t, pr_reg);
7297 memcpy (&prstat, note->descdata, sizeof (prstat));
7299 /* Do not overwrite the core signal if it
7300 has already been set by another thread. */
7301 if (elf_tdata (abfd)->core_signal == 0)
7302 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7303 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7305 /* pr_who exists on:
7308 pr_who doesn't exist on:
7311 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7312 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7315 #if defined (HAVE_PRSTATUS32_T)
7316 else if (note->descsz == sizeof (prstatus32_t))
7318 /* 64-bit host, 32-bit corefile */
7319 prstatus32_t prstat;
7321 size = sizeof (prstat.pr_reg);
7322 offset = offsetof (prstatus32_t, pr_reg);
7323 memcpy (&prstat, note->descdata, sizeof (prstat));
7325 /* Do not overwrite the core signal if it
7326 has already been set by another thread. */
7327 if (elf_tdata (abfd)->core_signal == 0)
7328 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7329 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7331 /* pr_who exists on:
7334 pr_who doesn't exist on:
7337 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7338 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7341 #endif /* HAVE_PRSTATUS32_T */
7344 /* Fail - we don't know how to handle any other
7345 note size (ie. data object type). */
7349 /* Make a ".reg/999" section and a ".reg" section. */
7350 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7351 size, note->descpos + offset);
7353 #endif /* defined (HAVE_PRSTATUS_T) */
7355 /* Create a pseudosection containing the exact contents of NOTE. */
7357 elfcore_make_note_pseudosection (bfd *abfd,
7359 Elf_Internal_Note *note)
7361 return _bfd_elfcore_make_pseudosection (abfd, name,
7362 note->descsz, note->descpos);
7365 /* There isn't a consistent prfpregset_t across platforms,
7366 but it doesn't matter, because we don't have to pick this
7367 data structure apart. */
7370 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7372 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7375 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7376 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7380 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7382 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7385 #if defined (HAVE_PRPSINFO_T)
7386 typedef prpsinfo_t elfcore_psinfo_t;
7387 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7388 typedef prpsinfo32_t elfcore_psinfo32_t;
7392 #if defined (HAVE_PSINFO_T)
7393 typedef psinfo_t elfcore_psinfo_t;
7394 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7395 typedef psinfo32_t elfcore_psinfo32_t;
7399 /* return a malloc'ed copy of a string at START which is at
7400 most MAX bytes long, possibly without a terminating '\0'.
7401 the copy will always have a terminating '\0'. */
7404 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7407 char *end = memchr (start, '\0', max);
7415 dups = bfd_alloc (abfd, len + 1);
7419 memcpy (dups, start, len);
7425 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7427 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7429 if (note->descsz == sizeof (elfcore_psinfo_t))
7431 elfcore_psinfo_t psinfo;
7433 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7435 elf_tdata (abfd)->core_program
7436 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7437 sizeof (psinfo.pr_fname));
7439 elf_tdata (abfd)->core_command
7440 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7441 sizeof (psinfo.pr_psargs));
7443 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7444 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7446 /* 64-bit host, 32-bit corefile */
7447 elfcore_psinfo32_t psinfo;
7449 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7451 elf_tdata (abfd)->core_program
7452 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7453 sizeof (psinfo.pr_fname));
7455 elf_tdata (abfd)->core_command
7456 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7457 sizeof (psinfo.pr_psargs));
7463 /* Fail - we don't know how to handle any other
7464 note size (ie. data object type). */
7468 /* Note that for some reason, a spurious space is tacked
7469 onto the end of the args in some (at least one anyway)
7470 implementations, so strip it off if it exists. */
7473 char *command = elf_tdata (abfd)->core_command;
7474 int n = strlen (command);
7476 if (0 < n && command[n - 1] == ' ')
7477 command[n - 1] = '\0';
7482 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7484 #if defined (HAVE_PSTATUS_T)
7486 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7488 if (note->descsz == sizeof (pstatus_t)
7489 #if defined (HAVE_PXSTATUS_T)
7490 || note->descsz == sizeof (pxstatus_t)
7496 memcpy (&pstat, note->descdata, sizeof (pstat));
7498 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7500 #if defined (HAVE_PSTATUS32_T)
7501 else if (note->descsz == sizeof (pstatus32_t))
7503 /* 64-bit host, 32-bit corefile */
7506 memcpy (&pstat, note->descdata, sizeof (pstat));
7508 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7511 /* Could grab some more details from the "representative"
7512 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7513 NT_LWPSTATUS note, presumably. */
7517 #endif /* defined (HAVE_PSTATUS_T) */
7519 #if defined (HAVE_LWPSTATUS_T)
7521 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7523 lwpstatus_t lwpstat;
7529 if (note->descsz != sizeof (lwpstat)
7530 #if defined (HAVE_LWPXSTATUS_T)
7531 && note->descsz != sizeof (lwpxstatus_t)
7536 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7538 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7539 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7541 /* Make a ".reg/999" section. */
7543 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7544 len = strlen (buf) + 1;
7545 name = bfd_alloc (abfd, len);
7548 memcpy (name, buf, len);
7550 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7554 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7555 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7556 sect->filepos = note->descpos
7557 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7560 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7561 sect->size = sizeof (lwpstat.pr_reg);
7562 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7565 sect->alignment_power = 2;
7567 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7570 /* Make a ".reg2/999" section */
7572 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7573 len = strlen (buf) + 1;
7574 name = bfd_alloc (abfd, len);
7577 memcpy (name, buf, len);
7579 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7583 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7584 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7585 sect->filepos = note->descpos
7586 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7589 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7590 sect->size = sizeof (lwpstat.pr_fpreg);
7591 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7594 sect->alignment_power = 2;
7596 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7598 #endif /* defined (HAVE_LWPSTATUS_T) */
7601 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7608 int is_active_thread;
7611 if (note->descsz < 728)
7614 if (! CONST_STRNEQ (note->namedata, "win32"))
7617 type = bfd_get_32 (abfd, note->descdata);
7621 case 1 /* NOTE_INFO_PROCESS */:
7622 /* FIXME: need to add ->core_command. */
7623 /* process_info.pid */
7624 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 8);
7625 /* process_info.signal */
7626 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 12);
7629 case 2 /* NOTE_INFO_THREAD */:
7630 /* Make a ".reg/999" section. */
7631 /* thread_info.tid */
7632 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
7634 len = strlen (buf) + 1;
7635 name = bfd_alloc (abfd, len);
7639 memcpy (name, buf, len);
7641 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7645 /* sizeof (thread_info.thread_context) */
7647 /* offsetof (thread_info.thread_context) */
7648 sect->filepos = note->descpos + 12;
7649 sect->alignment_power = 2;
7651 /* thread_info.is_active_thread */
7652 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
7654 if (is_active_thread)
7655 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7659 case 3 /* NOTE_INFO_MODULE */:
7660 /* Make a ".module/xxxxxxxx" section. */
7661 /* module_info.base_address */
7662 base_addr = bfd_get_32 (abfd, note->descdata + 4);
7663 sprintf (buf, ".module/%08lx", (long) base_addr);
7665 len = strlen (buf) + 1;
7666 name = bfd_alloc (abfd, len);
7670 memcpy (name, buf, len);
7672 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7677 sect->size = note->descsz;
7678 sect->filepos = note->descpos;
7679 sect->alignment_power = 2;
7690 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7692 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7700 if (bed->elf_backend_grok_prstatus)
7701 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7703 #if defined (HAVE_PRSTATUS_T)
7704 return elfcore_grok_prstatus (abfd, note);
7709 #if defined (HAVE_PSTATUS_T)
7711 return elfcore_grok_pstatus (abfd, note);
7714 #if defined (HAVE_LWPSTATUS_T)
7716 return elfcore_grok_lwpstatus (abfd, note);
7719 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7720 return elfcore_grok_prfpreg (abfd, note);
7722 case NT_WIN32PSTATUS:
7723 return elfcore_grok_win32pstatus (abfd, note);
7725 case NT_PRXFPREG: /* Linux SSE extension */
7726 if (note->namesz == 6
7727 && strcmp (note->namedata, "LINUX") == 0)
7728 return elfcore_grok_prxfpreg (abfd, note);
7734 if (bed->elf_backend_grok_psinfo)
7735 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7737 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7738 return elfcore_grok_psinfo (abfd, note);
7745 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
7750 sect->size = note->descsz;
7751 sect->filepos = note->descpos;
7752 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7760 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
7762 elf_tdata (abfd)->build_id_size = note->descsz;
7763 elf_tdata (abfd)->build_id = bfd_alloc (abfd, note->descsz);
7764 if (elf_tdata (abfd)->build_id == NULL)
7767 memcpy (elf_tdata (abfd)->build_id, note->descdata, note->descsz);
7773 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
7780 case NT_GNU_BUILD_ID:
7781 return elfobj_grok_gnu_build_id (abfd, note);
7786 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
7790 cp = strchr (note->namedata, '@');
7793 *lwpidp = atoi(cp + 1);
7800 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
7802 /* Signal number at offset 0x08. */
7803 elf_tdata (abfd)->core_signal
7804 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7806 /* Process ID at offset 0x50. */
7807 elf_tdata (abfd)->core_pid
7808 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7810 /* Command name at 0x7c (max 32 bytes, including nul). */
7811 elf_tdata (abfd)->core_command
7812 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
7814 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
7819 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
7823 if (elfcore_netbsd_get_lwpid (note, &lwp))
7824 elf_tdata (abfd)->core_lwpid = lwp;
7826 if (note->type == NT_NETBSDCORE_PROCINFO)
7828 /* NetBSD-specific core "procinfo". Note that we expect to
7829 find this note before any of the others, which is fine,
7830 since the kernel writes this note out first when it
7831 creates a core file. */
7833 return elfcore_grok_netbsd_procinfo (abfd, note);
7836 /* As of Jan 2002 there are no other machine-independent notes
7837 defined for NetBSD core files. If the note type is less
7838 than the start of the machine-dependent note types, we don't
7841 if (note->type < NT_NETBSDCORE_FIRSTMACH)
7845 switch (bfd_get_arch (abfd))
7847 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7848 PT_GETFPREGS == mach+2. */
7850 case bfd_arch_alpha:
7851 case bfd_arch_sparc:
7854 case NT_NETBSDCORE_FIRSTMACH+0:
7855 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7857 case NT_NETBSDCORE_FIRSTMACH+2:
7858 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7864 /* On all other arch's, PT_GETREGS == mach+1 and
7865 PT_GETFPREGS == mach+3. */
7870 case NT_NETBSDCORE_FIRSTMACH+1:
7871 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7873 case NT_NETBSDCORE_FIRSTMACH+3:
7874 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7884 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
7886 void *ddata = note->descdata;
7893 /* nto_procfs_status 'pid' field is at offset 0. */
7894 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
7896 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7897 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
7899 /* nto_procfs_status 'flags' field is at offset 8. */
7900 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
7902 /* nto_procfs_status 'what' field is at offset 14. */
7903 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
7905 elf_tdata (abfd)->core_signal = sig;
7906 elf_tdata (abfd)->core_lwpid = *tid;
7909 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7910 do not come from signals so we make sure we set the current
7911 thread just in case. */
7912 if (flags & 0x00000080)
7913 elf_tdata (abfd)->core_lwpid = *tid;
7915 /* Make a ".qnx_core_status/%d" section. */
7916 sprintf (buf, ".qnx_core_status/%ld", *tid);
7918 name = bfd_alloc (abfd, strlen (buf) + 1);
7923 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7927 sect->size = note->descsz;
7928 sect->filepos = note->descpos;
7929 sect->alignment_power = 2;
7931 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7935 elfcore_grok_nto_regs (bfd *abfd,
7936 Elf_Internal_Note *note,
7944 /* Make a "(base)/%d" section. */
7945 sprintf (buf, "%s/%ld", base, tid);
7947 name = bfd_alloc (abfd, strlen (buf) + 1);
7952 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7956 sect->size = note->descsz;
7957 sect->filepos = note->descpos;
7958 sect->alignment_power = 2;
7960 /* This is the current thread. */
7961 if (elf_tdata (abfd)->core_lwpid == tid)
7962 return elfcore_maybe_make_sect (abfd, base, sect);
7967 #define BFD_QNT_CORE_INFO 7
7968 #define BFD_QNT_CORE_STATUS 8
7969 #define BFD_QNT_CORE_GREG 9
7970 #define BFD_QNT_CORE_FPREG 10
7973 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
7975 /* Every GREG section has a STATUS section before it. Store the
7976 tid from the previous call to pass down to the next gregs
7978 static long tid = 1;
7982 case BFD_QNT_CORE_INFO:
7983 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7984 case BFD_QNT_CORE_STATUS:
7985 return elfcore_grok_nto_status (abfd, note, &tid);
7986 case BFD_QNT_CORE_GREG:
7987 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
7988 case BFD_QNT_CORE_FPREG:
7989 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
7996 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
8002 /* Use note name as section name. */
8004 name = bfd_alloc (abfd, len);
8007 memcpy (name, note->namedata, len);
8008 name[len - 1] = '\0';
8010 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8014 sect->size = note->descsz;
8015 sect->filepos = note->descpos;
8016 sect->alignment_power = 1;
8021 /* Function: elfcore_write_note
8024 buffer to hold note, and current size of buffer
8028 size of data for note
8030 Writes note to end of buffer. ELF64 notes are written exactly as
8031 for ELF32, despite the current (as of 2006) ELF gabi specifying
8032 that they ought to have 8-byte namesz and descsz field, and have
8033 8-byte alignment. Other writers, eg. Linux kernel, do the same.
8036 Pointer to realloc'd buffer, *BUFSIZ updated. */
8039 elfcore_write_note (bfd *abfd,
8047 Elf_External_Note *xnp;
8054 namesz = strlen (name) + 1;
8056 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
8058 buf = realloc (buf, *bufsiz + newspace);
8059 dest = buf + *bufsiz;
8060 *bufsiz += newspace;
8061 xnp = (Elf_External_Note *) dest;
8062 H_PUT_32 (abfd, namesz, xnp->namesz);
8063 H_PUT_32 (abfd, size, xnp->descsz);
8064 H_PUT_32 (abfd, type, xnp->type);
8068 memcpy (dest, name, namesz);
8076 memcpy (dest, input, size);
8086 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8088 elfcore_write_prpsinfo (bfd *abfd,
8094 const char *note_name = "CORE";
8095 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8097 if (bed->elf_backend_write_core_note != NULL)
8100 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8101 NT_PRPSINFO, fname, psargs);
8106 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8107 if (bed->s->elfclass == ELFCLASS32)
8109 #if defined (HAVE_PSINFO32_T)
8111 int note_type = NT_PSINFO;
8114 int note_type = NT_PRPSINFO;
8117 memset (&data, 0, sizeof (data));
8118 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8119 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8120 return elfcore_write_note (abfd, buf, bufsiz,
8121 note_name, note_type, &data, sizeof (data));
8126 #if defined (HAVE_PSINFO_T)
8128 int note_type = NT_PSINFO;
8131 int note_type = NT_PRPSINFO;
8134 memset (&data, 0, sizeof (data));
8135 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8136 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8137 return elfcore_write_note (abfd, buf, bufsiz,
8138 note_name, note_type, &data, sizeof (data));
8141 #endif /* PSINFO_T or PRPSINFO_T */
8143 #if defined (HAVE_PRSTATUS_T)
8145 elfcore_write_prstatus (bfd *abfd,
8152 const char *note_name = "CORE";
8153 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8155 if (bed->elf_backend_write_core_note != NULL)
8158 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8160 pid, cursig, gregs);
8165 #if defined (HAVE_PRSTATUS32_T)
8166 if (bed->s->elfclass == ELFCLASS32)
8168 prstatus32_t prstat;
8170 memset (&prstat, 0, sizeof (prstat));
8171 prstat.pr_pid = pid;
8172 prstat.pr_cursig = cursig;
8173 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8174 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8175 NT_PRSTATUS, &prstat, sizeof (prstat));
8182 memset (&prstat, 0, sizeof (prstat));
8183 prstat.pr_pid = pid;
8184 prstat.pr_cursig = cursig;
8185 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8186 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8187 NT_PRSTATUS, &prstat, sizeof (prstat));
8190 #endif /* HAVE_PRSTATUS_T */
8192 #if defined (HAVE_LWPSTATUS_T)
8194 elfcore_write_lwpstatus (bfd *abfd,
8201 lwpstatus_t lwpstat;
8202 const char *note_name = "CORE";
8204 memset (&lwpstat, 0, sizeof (lwpstat));
8205 lwpstat.pr_lwpid = pid >> 16;
8206 lwpstat.pr_cursig = cursig;
8207 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8208 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
8209 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8211 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
8212 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
8214 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
8215 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
8218 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8219 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
8221 #endif /* HAVE_LWPSTATUS_T */
8223 #if defined (HAVE_PSTATUS_T)
8225 elfcore_write_pstatus (bfd *abfd,
8229 int cursig ATTRIBUTE_UNUSED,
8230 const void *gregs ATTRIBUTE_UNUSED)
8232 const char *note_name = "CORE";
8233 #if defined (HAVE_PSTATUS32_T)
8234 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8236 if (bed->s->elfclass == ELFCLASS32)
8240 memset (&pstat, 0, sizeof (pstat));
8241 pstat.pr_pid = pid & 0xffff;
8242 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8243 NT_PSTATUS, &pstat, sizeof (pstat));
8251 memset (&pstat, 0, sizeof (pstat));
8252 pstat.pr_pid = pid & 0xffff;
8253 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8254 NT_PSTATUS, &pstat, sizeof (pstat));
8258 #endif /* HAVE_PSTATUS_T */
8261 elfcore_write_prfpreg (bfd *abfd,
8267 const char *note_name = "CORE";
8268 return elfcore_write_note (abfd, buf, bufsiz,
8269 note_name, NT_FPREGSET, fpregs, size);
8273 elfcore_write_prxfpreg (bfd *abfd,
8276 const void *xfpregs,
8279 char *note_name = "LINUX";
8280 return elfcore_write_note (abfd, buf, bufsiz,
8281 note_name, NT_PRXFPREG, xfpregs, size);
8285 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
8290 while (p < buf + size)
8292 /* FIXME: bad alignment assumption. */
8293 Elf_External_Note *xnp = (Elf_External_Note *) p;
8294 Elf_Internal_Note in;
8296 in.type = H_GET_32 (abfd, xnp->type);
8298 in.namesz = H_GET_32 (abfd, xnp->namesz);
8299 in.namedata = xnp->name;
8301 in.descsz = H_GET_32 (abfd, xnp->descsz);
8302 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
8303 in.descpos = offset + (in.descdata - buf);
8305 switch (bfd_get_format (abfd))
8311 if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
8313 if (! elfcore_grok_netbsd_note (abfd, &in))
8316 else if (CONST_STRNEQ (in.namedata, "QNX"))
8318 if (! elfcore_grok_nto_note (abfd, &in))
8321 else if (CONST_STRNEQ (in.namedata, "SPU/"))
8323 if (! elfcore_grok_spu_note (abfd, &in))
8328 if (! elfcore_grok_note (abfd, &in))
8334 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
8336 if (! elfobj_grok_gnu_note (abfd, &in))
8342 p = in.descdata + BFD_ALIGN (in.descsz, 4);
8349 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
8356 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
8359 buf = bfd_malloc (size);
8363 if (bfd_bread (buf, size, abfd) != size
8364 || !elf_parse_notes (abfd, buf, size, offset))
8374 /* Providing external access to the ELF program header table. */
8376 /* Return an upper bound on the number of bytes required to store a
8377 copy of ABFD's program header table entries. Return -1 if an error
8378 occurs; bfd_get_error will return an appropriate code. */
8381 bfd_get_elf_phdr_upper_bound (bfd *abfd)
8383 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8385 bfd_set_error (bfd_error_wrong_format);
8389 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
8392 /* Copy ABFD's program header table entries to *PHDRS. The entries
8393 will be stored as an array of Elf_Internal_Phdr structures, as
8394 defined in include/elf/internal.h. To find out how large the
8395 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8397 Return the number of program header table entries read, or -1 if an
8398 error occurs; bfd_get_error will return an appropriate code. */
8401 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
8405 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8407 bfd_set_error (bfd_error_wrong_format);
8411 num_phdrs = elf_elfheader (abfd)->e_phnum;
8412 memcpy (phdrs, elf_tdata (abfd)->phdr,
8413 num_phdrs * sizeof (Elf_Internal_Phdr));
8419 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
8422 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8424 i_ehdrp = elf_elfheader (abfd);
8425 if (i_ehdrp == NULL)
8426 sprintf_vma (buf, value);
8429 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8431 #if BFD_HOST_64BIT_LONG
8432 sprintf (buf, "%016lx", value);
8434 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
8435 _bfd_int64_low (value));
8439 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
8442 sprintf_vma (buf, value);
8447 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
8450 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8452 i_ehdrp = elf_elfheader (abfd);
8453 if (i_ehdrp == NULL)
8454 fprintf_vma ((FILE *) stream, value);
8457 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8459 #if BFD_HOST_64BIT_LONG
8460 fprintf ((FILE *) stream, "%016lx", value);
8462 fprintf ((FILE *) stream, "%08lx%08lx",
8463 _bfd_int64_high (value), _bfd_int64_low (value));
8467 fprintf ((FILE *) stream, "%08lx",
8468 (unsigned long) (value & 0xffffffff));
8471 fprintf_vma ((FILE *) stream, value);
8475 enum elf_reloc_type_class
8476 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
8478 return reloc_class_normal;
8481 /* For RELA architectures, return the relocation value for a
8482 relocation against a local symbol. */
8485 _bfd_elf_rela_local_sym (bfd *abfd,
8486 Elf_Internal_Sym *sym,
8488 Elf_Internal_Rela *rel)
8490 asection *sec = *psec;
8493 relocation = (sec->output_section->vma
8494 + sec->output_offset
8496 if ((sec->flags & SEC_MERGE)
8497 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
8498 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
8501 _bfd_merged_section_offset (abfd, psec,
8502 elf_section_data (sec)->sec_info,
8503 sym->st_value + rel->r_addend);
8506 /* If we have changed the section, and our original section is
8507 marked with SEC_EXCLUDE, it means that the original
8508 SEC_MERGE section has been completely subsumed in some
8509 other SEC_MERGE section. In this case, we need to leave
8510 some info around for --emit-relocs. */
8511 if ((sec->flags & SEC_EXCLUDE) != 0)
8512 sec->kept_section = *psec;
8515 rel->r_addend -= relocation;
8516 rel->r_addend += sec->output_section->vma + sec->output_offset;
8522 _bfd_elf_rel_local_sym (bfd *abfd,
8523 Elf_Internal_Sym *sym,
8527 asection *sec = *psec;
8529 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
8530 return sym->st_value + addend;
8532 return _bfd_merged_section_offset (abfd, psec,
8533 elf_section_data (sec)->sec_info,
8534 sym->st_value + addend);
8538 _bfd_elf_section_offset (bfd *abfd,
8539 struct bfd_link_info *info,
8543 switch (sec->sec_info_type)
8545 case ELF_INFO_TYPE_STABS:
8546 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
8548 case ELF_INFO_TYPE_EH_FRAME:
8549 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
8555 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8556 reconstruct an ELF file by reading the segments out of remote memory
8557 based on the ELF file header at EHDR_VMA and the ELF program headers it
8558 points to. If not null, *LOADBASEP is filled in with the difference
8559 between the VMAs from which the segments were read, and the VMAs the
8560 file headers (and hence BFD's idea of each section's VMA) put them at.
8562 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8563 remote memory at target address VMA into the local buffer at MYADDR; it
8564 should return zero on success or an `errno' code on failure. TEMPL must
8565 be a BFD for an ELF target with the word size and byte order found in
8566 the remote memory. */
8569 bfd_elf_bfd_from_remote_memory
8573 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
8575 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
8576 (templ, ehdr_vma, loadbasep, target_read_memory);
8580 _bfd_elf_get_synthetic_symtab (bfd *abfd,
8581 long symcount ATTRIBUTE_UNUSED,
8582 asymbol **syms ATTRIBUTE_UNUSED,
8587 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8590 const char *relplt_name;
8591 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8595 Elf_Internal_Shdr *hdr;
8601 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
8604 if (dynsymcount <= 0)
8607 if (!bed->plt_sym_val)
8610 relplt_name = bed->relplt_name;
8611 if (relplt_name == NULL)
8612 relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
8613 relplt = bfd_get_section_by_name (abfd, relplt_name);
8617 hdr = &elf_section_data (relplt)->this_hdr;
8618 if (hdr->sh_link != elf_dynsymtab (abfd)
8619 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
8622 plt = bfd_get_section_by_name (abfd, ".plt");
8626 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8627 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
8630 count = relplt->size / hdr->sh_entsize;
8631 size = count * sizeof (asymbol);
8632 p = relplt->relocation;
8633 for (i = 0; i < count; i++, p++)
8634 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
8636 s = *ret = bfd_malloc (size);
8640 names = (char *) (s + count);
8641 p = relplt->relocation;
8643 for (i = 0; i < count; i++, s++, p++)
8648 addr = bed->plt_sym_val (i, plt, p);
8649 if (addr == (bfd_vma) -1)
8652 *s = **p->sym_ptr_ptr;
8653 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8654 we are defining a symbol, ensure one of them is set. */
8655 if ((s->flags & BSF_LOCAL) == 0)
8656 s->flags |= BSF_GLOBAL;
8658 s->value = addr - plt->vma;
8660 len = strlen ((*p->sym_ptr_ptr)->name);
8661 memcpy (names, (*p->sym_ptr_ptr)->name, len);
8663 memcpy (names, "@plt", sizeof ("@plt"));
8664 names += sizeof ("@plt");
8671 /* It is only used by x86-64 so far. */
8672 asection _bfd_elf_large_com_section
8673 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
8674 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
8677 _bfd_elf_set_osabi (bfd * abfd,
8678 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
8680 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
8682 i_ehdrp = elf_elfheader (abfd);
8684 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
8688 /* Return TRUE for ELF symbol types that represent functions.
8689 This is the default version of this function, which is sufficient for
8690 most targets. It returns true if TYPE is STT_FUNC. */
8693 _bfd_elf_is_function_type (unsigned int type)
8695 return (type == STT_FUNC);