1 /* ELF executable support for BFD.
3 Copyright (C) 1993-2018 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
27 BFD support for ELF formats is being worked on.
28 Currently, the best supported back ends are for sparc and i386
29 (running svr4 or Solaris 2).
31 Documentation of the internals of the support code still needs
32 to be written. The code is changing quickly enough that we
33 haven't bothered yet. */
35 /* For sparc64-cross-sparc32. */
43 #include "libiberty.h"
44 #include "safe-ctype.h"
45 #include "elf-linux-core.h"
51 static int elf_sort_sections (const void *, const void *);
52 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
53 static bfd_boolean prep_headers (bfd *);
54 static bfd_boolean swap_out_syms (bfd *, struct elf_strtab_hash **, int) ;
55 static bfd_boolean elf_read_notes (bfd *, file_ptr, bfd_size_type,
57 static bfd_boolean elf_parse_notes (bfd *abfd, char *buf, size_t size,
58 file_ptr offset, size_t align);
60 /* Swap version information in and out. The version information is
61 currently size independent. If that ever changes, this code will
62 need to move into elfcode.h. */
64 /* Swap in a Verdef structure. */
67 _bfd_elf_swap_verdef_in (bfd *abfd,
68 const Elf_External_Verdef *src,
69 Elf_Internal_Verdef *dst)
71 dst->vd_version = H_GET_16 (abfd, src->vd_version);
72 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
73 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
74 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
75 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
76 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
77 dst->vd_next = H_GET_32 (abfd, src->vd_next);
80 /* Swap out a Verdef structure. */
83 _bfd_elf_swap_verdef_out (bfd *abfd,
84 const Elf_Internal_Verdef *src,
85 Elf_External_Verdef *dst)
87 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
88 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
89 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
90 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
91 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
92 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
93 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
96 /* Swap in a Verdaux structure. */
99 _bfd_elf_swap_verdaux_in (bfd *abfd,
100 const Elf_External_Verdaux *src,
101 Elf_Internal_Verdaux *dst)
103 dst->vda_name = H_GET_32 (abfd, src->vda_name);
104 dst->vda_next = H_GET_32 (abfd, src->vda_next);
107 /* Swap out a Verdaux structure. */
110 _bfd_elf_swap_verdaux_out (bfd *abfd,
111 const Elf_Internal_Verdaux *src,
112 Elf_External_Verdaux *dst)
114 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
115 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
118 /* Swap in a Verneed structure. */
121 _bfd_elf_swap_verneed_in (bfd *abfd,
122 const Elf_External_Verneed *src,
123 Elf_Internal_Verneed *dst)
125 dst->vn_version = H_GET_16 (abfd, src->vn_version);
126 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
127 dst->vn_file = H_GET_32 (abfd, src->vn_file);
128 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
129 dst->vn_next = H_GET_32 (abfd, src->vn_next);
132 /* Swap out a Verneed structure. */
135 _bfd_elf_swap_verneed_out (bfd *abfd,
136 const Elf_Internal_Verneed *src,
137 Elf_External_Verneed *dst)
139 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
140 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
141 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
142 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
143 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
146 /* Swap in a Vernaux structure. */
149 _bfd_elf_swap_vernaux_in (bfd *abfd,
150 const Elf_External_Vernaux *src,
151 Elf_Internal_Vernaux *dst)
153 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
154 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
155 dst->vna_other = H_GET_16 (abfd, src->vna_other);
156 dst->vna_name = H_GET_32 (abfd, src->vna_name);
157 dst->vna_next = H_GET_32 (abfd, src->vna_next);
160 /* Swap out a Vernaux structure. */
163 _bfd_elf_swap_vernaux_out (bfd *abfd,
164 const Elf_Internal_Vernaux *src,
165 Elf_External_Vernaux *dst)
167 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
168 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
169 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
170 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
171 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
174 /* Swap in a Versym structure. */
177 _bfd_elf_swap_versym_in (bfd *abfd,
178 const Elf_External_Versym *src,
179 Elf_Internal_Versym *dst)
181 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
184 /* Swap out a Versym structure. */
187 _bfd_elf_swap_versym_out (bfd *abfd,
188 const Elf_Internal_Versym *src,
189 Elf_External_Versym *dst)
191 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
194 /* Standard ELF hash function. Do not change this function; you will
195 cause invalid hash tables to be generated. */
198 bfd_elf_hash (const char *namearg)
200 const unsigned char *name = (const unsigned char *) namearg;
205 while ((ch = *name++) != '\0')
208 if ((g = (h & 0xf0000000)) != 0)
211 /* The ELF ABI says `h &= ~g', but this is equivalent in
212 this case and on some machines one insn instead of two. */
216 return h & 0xffffffff;
219 /* DT_GNU_HASH hash function. Do not change this function; you will
220 cause invalid hash tables to be generated. */
223 bfd_elf_gnu_hash (const char *namearg)
225 const unsigned char *name = (const unsigned char *) namearg;
226 unsigned long h = 5381;
229 while ((ch = *name++) != '\0')
230 h = (h << 5) + h + ch;
231 return h & 0xffffffff;
234 /* Create a tdata field OBJECT_SIZE bytes in length, zeroed out and with
235 the object_id field of an elf_obj_tdata field set to OBJECT_ID. */
237 bfd_elf_allocate_object (bfd *abfd,
239 enum elf_target_id object_id)
241 BFD_ASSERT (object_size >= sizeof (struct elf_obj_tdata));
242 abfd->tdata.any = bfd_zalloc (abfd, object_size);
243 if (abfd->tdata.any == NULL)
246 elf_object_id (abfd) = object_id;
247 if (abfd->direction != read_direction)
249 struct output_elf_obj_tdata *o = bfd_zalloc (abfd, sizeof *o);
252 elf_tdata (abfd)->o = o;
253 elf_program_header_size (abfd) = (bfd_size_type) -1;
260 bfd_elf_make_object (bfd *abfd)
262 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
263 return bfd_elf_allocate_object (abfd, sizeof (struct elf_obj_tdata),
268 bfd_elf_mkcorefile (bfd *abfd)
270 /* I think this can be done just like an object file. */
271 if (!abfd->xvec->_bfd_set_format[(int) bfd_object] (abfd))
273 elf_tdata (abfd)->core = bfd_zalloc (abfd, sizeof (*elf_tdata (abfd)->core));
274 return elf_tdata (abfd)->core != NULL;
278 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
280 Elf_Internal_Shdr **i_shdrp;
281 bfd_byte *shstrtab = NULL;
283 bfd_size_type shstrtabsize;
285 i_shdrp = elf_elfsections (abfd);
287 || shindex >= elf_numsections (abfd)
288 || i_shdrp[shindex] == 0)
291 shstrtab = i_shdrp[shindex]->contents;
292 if (shstrtab == NULL)
294 /* No cached one, attempt to read, and cache what we read. */
295 offset = i_shdrp[shindex]->sh_offset;
296 shstrtabsize = i_shdrp[shindex]->sh_size;
298 /* Allocate and clear an extra byte at the end, to prevent crashes
299 in case the string table is not terminated. */
300 if (shstrtabsize + 1 <= 1
301 || bfd_seek (abfd, offset, SEEK_SET) != 0
302 || (shstrtab = (bfd_byte *) bfd_alloc (abfd, shstrtabsize + 1)) == NULL)
304 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
306 if (bfd_get_error () != bfd_error_system_call)
307 bfd_set_error (bfd_error_file_truncated);
308 bfd_release (abfd, shstrtab);
310 /* Once we've failed to read it, make sure we don't keep
311 trying. Otherwise, we'll keep allocating space for
312 the string table over and over. */
313 i_shdrp[shindex]->sh_size = 0;
316 shstrtab[shstrtabsize] = '\0';
317 i_shdrp[shindex]->contents = shstrtab;
319 return (char *) shstrtab;
323 bfd_elf_string_from_elf_section (bfd *abfd,
324 unsigned int shindex,
325 unsigned int strindex)
327 Elf_Internal_Shdr *hdr;
332 if (elf_elfsections (abfd) == NULL || shindex >= elf_numsections (abfd))
335 hdr = elf_elfsections (abfd)[shindex];
337 if (hdr->contents == NULL)
339 if (hdr->sh_type != SHT_STRTAB && hdr->sh_type < SHT_LOOS)
341 /* PR 17512: file: f057ec89. */
342 /* xgettext:c-format */
343 _bfd_error_handler (_("%pB: attempt to load strings from"
344 " a non-string section (number %d)"),
349 if (bfd_elf_get_str_section (abfd, shindex) == NULL)
353 if (strindex >= hdr->sh_size)
355 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
357 /* xgettext:c-format */
358 (_("%pB: invalid string offset %u >= %" PRIu64 " for section `%s'"),
359 abfd, strindex, (uint64_t) hdr->sh_size,
360 (shindex == shstrndx && strindex == hdr->sh_name
362 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
366 return ((char *) hdr->contents) + strindex;
369 /* Read and convert symbols to internal format.
370 SYMCOUNT specifies the number of symbols to read, starting from
371 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
372 are non-NULL, they are used to store the internal symbols, external
373 symbols, and symbol section index extensions, respectively.
374 Returns a pointer to the internal symbol buffer (malloced if necessary)
375 or NULL if there were no symbols or some kind of problem. */
378 bfd_elf_get_elf_syms (bfd *ibfd,
379 Elf_Internal_Shdr *symtab_hdr,
382 Elf_Internal_Sym *intsym_buf,
384 Elf_External_Sym_Shndx *extshndx_buf)
386 Elf_Internal_Shdr *shndx_hdr;
388 const bfd_byte *esym;
389 Elf_External_Sym_Shndx *alloc_extshndx;
390 Elf_External_Sym_Shndx *shndx;
391 Elf_Internal_Sym *alloc_intsym;
392 Elf_Internal_Sym *isym;
393 Elf_Internal_Sym *isymend;
394 const struct elf_backend_data *bed;
399 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
405 /* Normal syms might have section extension entries. */
407 if (elf_symtab_shndx_list (ibfd) != NULL)
409 elf_section_list * entry;
410 Elf_Internal_Shdr **sections = elf_elfsections (ibfd);
412 /* Find an index section that is linked to this symtab section. */
413 for (entry = elf_symtab_shndx_list (ibfd); entry != NULL; entry = entry->next)
416 if (entry->hdr.sh_link >= elf_numsections (ibfd))
419 if (sections[entry->hdr.sh_link] == symtab_hdr)
421 shndx_hdr = & entry->hdr;
426 if (shndx_hdr == NULL)
428 if (symtab_hdr == & elf_symtab_hdr (ibfd))
429 /* Not really accurate, but this was how the old code used to work. */
430 shndx_hdr = & elf_symtab_shndx_list (ibfd)->hdr;
431 /* Otherwise we do nothing. The assumption is that
432 the index table will not be needed. */
436 /* Read the symbols. */
438 alloc_extshndx = NULL;
440 bed = get_elf_backend_data (ibfd);
441 extsym_size = bed->s->sizeof_sym;
442 amt = (bfd_size_type) symcount * extsym_size;
443 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
444 if (extsym_buf == NULL)
446 alloc_ext = bfd_malloc2 (symcount, extsym_size);
447 extsym_buf = alloc_ext;
449 if (extsym_buf == NULL
450 || bfd_seek (ibfd, pos, SEEK_SET) != 0
451 || bfd_bread (extsym_buf, amt, ibfd) != amt)
457 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
461 amt = (bfd_size_type) symcount * sizeof (Elf_External_Sym_Shndx);
462 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
463 if (extshndx_buf == NULL)
465 alloc_extshndx = (Elf_External_Sym_Shndx *)
466 bfd_malloc2 (symcount, sizeof (Elf_External_Sym_Shndx));
467 extshndx_buf = alloc_extshndx;
469 if (extshndx_buf == NULL
470 || bfd_seek (ibfd, pos, SEEK_SET) != 0
471 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
478 if (intsym_buf == NULL)
480 alloc_intsym = (Elf_Internal_Sym *)
481 bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
482 intsym_buf = alloc_intsym;
483 if (intsym_buf == NULL)
487 /* Convert the symbols to internal form. */
488 isymend = intsym_buf + symcount;
489 for (esym = (const bfd_byte *) extsym_buf, isym = intsym_buf,
490 shndx = extshndx_buf;
492 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
493 if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym))
495 symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size;
496 /* xgettext:c-format */
497 _bfd_error_handler (_("%pB symbol number %lu references"
498 " nonexistent SHT_SYMTAB_SHNDX section"),
499 ibfd, (unsigned long) symoffset);
500 if (alloc_intsym != NULL)
507 if (alloc_ext != NULL)
509 if (alloc_extshndx != NULL)
510 free (alloc_extshndx);
515 /* Look up a symbol name. */
517 bfd_elf_sym_name (bfd *abfd,
518 Elf_Internal_Shdr *symtab_hdr,
519 Elf_Internal_Sym *isym,
523 unsigned int iname = isym->st_name;
524 unsigned int shindex = symtab_hdr->sh_link;
526 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
527 /* Check for a bogus st_shndx to avoid crashing. */
528 && isym->st_shndx < elf_numsections (abfd))
530 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
531 shindex = elf_elfheader (abfd)->e_shstrndx;
534 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
537 else if (sym_sec && *name == '\0')
538 name = bfd_section_name (abfd, sym_sec);
543 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
544 sections. The first element is the flags, the rest are section
547 typedef union elf_internal_group {
548 Elf_Internal_Shdr *shdr;
550 } Elf_Internal_Group;
552 /* Return the name of the group signature symbol. Why isn't the
553 signature just a string? */
556 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
558 Elf_Internal_Shdr *hdr;
559 unsigned char esym[sizeof (Elf64_External_Sym)];
560 Elf_External_Sym_Shndx eshndx;
561 Elf_Internal_Sym isym;
563 /* First we need to ensure the symbol table is available. Make sure
564 that it is a symbol table section. */
565 if (ghdr->sh_link >= elf_numsections (abfd))
567 hdr = elf_elfsections (abfd) [ghdr->sh_link];
568 if (hdr->sh_type != SHT_SYMTAB
569 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
572 /* Go read the symbol. */
573 hdr = &elf_tdata (abfd)->symtab_hdr;
574 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
575 &isym, esym, &eshndx) == NULL)
578 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
581 /* Set next_in_group list pointer, and group name for NEWSECT. */
584 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
586 unsigned int num_group = elf_tdata (abfd)->num_group;
588 /* If num_group is zero, read in all SHT_GROUP sections. The count
589 is set to -1 if there are no SHT_GROUP sections. */
592 unsigned int i, shnum;
594 /* First count the number of groups. If we have a SHT_GROUP
595 section with just a flag word (ie. sh_size is 4), ignore it. */
596 shnum = elf_numsections (abfd);
599 #define IS_VALID_GROUP_SECTION_HEADER(shdr, minsize) \
600 ( (shdr)->sh_type == SHT_GROUP \
601 && (shdr)->sh_size >= minsize \
602 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
603 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
605 for (i = 0; i < shnum; i++)
607 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
609 if (IS_VALID_GROUP_SECTION_HEADER (shdr, 2 * GRP_ENTRY_SIZE))
615 num_group = (unsigned) -1;
616 elf_tdata (abfd)->num_group = num_group;
617 elf_tdata (abfd)->group_sect_ptr = NULL;
621 /* We keep a list of elf section headers for group sections,
622 so we can find them quickly. */
625 elf_tdata (abfd)->num_group = num_group;
626 elf_tdata (abfd)->group_sect_ptr = (Elf_Internal_Shdr **)
627 bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
628 if (elf_tdata (abfd)->group_sect_ptr == NULL)
630 memset (elf_tdata (abfd)->group_sect_ptr, 0, num_group * sizeof (Elf_Internal_Shdr *));
633 for (i = 0; i < shnum; i++)
635 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
637 if (IS_VALID_GROUP_SECTION_HEADER (shdr, 2 * GRP_ENTRY_SIZE))
640 Elf_Internal_Group *dest;
642 /* Make sure the group section has a BFD section
644 if (!bfd_section_from_shdr (abfd, i))
647 /* Add to list of sections. */
648 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
651 /* Read the raw contents. */
652 BFD_ASSERT (sizeof (*dest) >= 4);
653 amt = shdr->sh_size * sizeof (*dest) / 4;
654 shdr->contents = (unsigned char *)
655 bfd_alloc2 (abfd, shdr->sh_size, sizeof (*dest) / 4);
656 /* PR binutils/4110: Handle corrupt group headers. */
657 if (shdr->contents == NULL)
660 /* xgettext:c-format */
661 (_("%pB: corrupt size field in group section"
662 " header: %#" PRIx64),
663 abfd, (uint64_t) shdr->sh_size);
664 bfd_set_error (bfd_error_bad_value);
669 memset (shdr->contents, 0, amt);
671 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
672 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
676 /* xgettext:c-format */
677 (_("%pB: invalid size field in group section"
678 " header: %#" PRIx64 ""),
679 abfd, (uint64_t) shdr->sh_size);
680 bfd_set_error (bfd_error_bad_value);
682 /* PR 17510: If the group contents are even
683 partially corrupt, do not allow any of the
684 contents to be used. */
685 memset (shdr->contents, 0, amt);
689 /* Translate raw contents, a flag word followed by an
690 array of elf section indices all in target byte order,
691 to the flag word followed by an array of elf section
693 src = shdr->contents + shdr->sh_size;
694 dest = (Elf_Internal_Group *) (shdr->contents + amt);
702 idx = H_GET_32 (abfd, src);
703 if (src == shdr->contents)
706 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
707 shdr->bfd_section->flags
708 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
714 (_("%pB: invalid SHT_GROUP entry"), abfd);
717 dest->shdr = elf_elfsections (abfd)[idx];
722 /* PR 17510: Corrupt binaries might contain invalid groups. */
723 if (num_group != (unsigned) elf_tdata (abfd)->num_group)
725 elf_tdata (abfd)->num_group = num_group;
727 /* If all groups are invalid then fail. */
730 elf_tdata (abfd)->group_sect_ptr = NULL;
731 elf_tdata (abfd)->num_group = num_group = -1;
733 (_("%pB: no valid group sections found"), abfd);
734 bfd_set_error (bfd_error_bad_value);
740 if (num_group != (unsigned) -1)
742 unsigned int search_offset = elf_tdata (abfd)->group_search_offset;
745 for (j = 0; j < num_group; j++)
747 /* Begin search from previous found group. */
748 unsigned i = (j + search_offset) % num_group;
750 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
751 Elf_Internal_Group *idx;
757 idx = (Elf_Internal_Group *) shdr->contents;
758 if (idx == NULL || shdr->sh_size < 4)
760 /* See PR 21957 for a reproducer. */
761 /* xgettext:c-format */
762 _bfd_error_handler (_("%pB: group section '%pA' has no contents"),
763 abfd, shdr->bfd_section);
764 elf_tdata (abfd)->group_sect_ptr[i] = NULL;
765 bfd_set_error (bfd_error_bad_value);
768 n_elt = shdr->sh_size / 4;
770 /* Look through this group's sections to see if current
771 section is a member. */
773 if ((++idx)->shdr == hdr)
777 /* We are a member of this group. Go looking through
778 other members to see if any others are linked via
780 idx = (Elf_Internal_Group *) shdr->contents;
781 n_elt = shdr->sh_size / 4;
783 if ((s = (++idx)->shdr->bfd_section) != NULL
784 && elf_next_in_group (s) != NULL)
788 /* Snarf the group name from other member, and
789 insert current section in circular list. */
790 elf_group_name (newsect) = elf_group_name (s);
791 elf_next_in_group (newsect) = elf_next_in_group (s);
792 elf_next_in_group (s) = newsect;
798 gname = group_signature (abfd, shdr);
801 elf_group_name (newsect) = gname;
803 /* Start a circular list with one element. */
804 elf_next_in_group (newsect) = newsect;
807 /* If the group section has been created, point to the
809 if (shdr->bfd_section != NULL)
810 elf_next_in_group (shdr->bfd_section) = newsect;
812 elf_tdata (abfd)->group_search_offset = i;
819 if (elf_group_name (newsect) == NULL)
821 /* xgettext:c-format */
822 _bfd_error_handler (_("%pB: no group info for section '%pA'"),
830 _bfd_elf_setup_sections (bfd *abfd)
833 unsigned int num_group = elf_tdata (abfd)->num_group;
834 bfd_boolean result = TRUE;
837 /* Process SHF_LINK_ORDER. */
838 for (s = abfd->sections; s != NULL; s = s->next)
840 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
841 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
843 unsigned int elfsec = this_hdr->sh_link;
844 /* FIXME: The old Intel compiler and old strip/objcopy may
845 not set the sh_link or sh_info fields. Hence we could
846 get the situation where elfsec is 0. */
849 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
850 if (bed->link_order_error_handler)
851 bed->link_order_error_handler
852 /* xgettext:c-format */
853 (_("%pB: warning: sh_link not set for section `%pA'"),
858 asection *linksec = NULL;
860 if (elfsec < elf_numsections (abfd))
862 this_hdr = elf_elfsections (abfd)[elfsec];
863 linksec = this_hdr->bfd_section;
867 Some strip/objcopy may leave an incorrect value in
868 sh_link. We don't want to proceed. */
872 /* xgettext:c-format */
873 (_("%pB: sh_link [%d] in section `%pA' is incorrect"),
874 s->owner, elfsec, s);
878 elf_linked_to_section (s) = linksec;
881 else if (this_hdr->sh_type == SHT_GROUP
882 && elf_next_in_group (s) == NULL)
885 /* xgettext:c-format */
886 (_("%pB: SHT_GROUP section [index %d] has no SHF_GROUP sections"),
887 abfd, elf_section_data (s)->this_idx);
892 /* Process section groups. */
893 if (num_group == (unsigned) -1)
896 for (i = 0; i < num_group; i++)
898 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
899 Elf_Internal_Group *idx;
902 /* PR binutils/18758: Beware of corrupt binaries with invalid group data. */
903 if (shdr == NULL || shdr->bfd_section == NULL || shdr->contents == NULL)
906 /* xgettext:c-format */
907 (_("%pB: section group entry number %u is corrupt"),
913 idx = (Elf_Internal_Group *) shdr->contents;
914 n_elt = shdr->sh_size / 4;
920 if (idx->shdr == NULL)
922 else if (idx->shdr->bfd_section)
923 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
924 else if (idx->shdr->sh_type != SHT_RELA
925 && idx->shdr->sh_type != SHT_REL)
927 /* There are some unknown sections in the group. */
929 /* xgettext:c-format */
930 (_("%pB: unknown type [%#x] section `%s' in group [%pA]"),
933 bfd_elf_string_from_elf_section (abfd,
934 (elf_elfheader (abfd)
947 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
949 return elf_next_in_group (sec) != NULL;
953 convert_debug_to_zdebug (bfd *abfd, const char *name)
955 unsigned int len = strlen (name);
956 char *new_name = bfd_alloc (abfd, len + 2);
957 if (new_name == NULL)
961 memcpy (new_name + 2, name + 1, len);
966 convert_zdebug_to_debug (bfd *abfd, const char *name)
968 unsigned int len = strlen (name);
969 char *new_name = bfd_alloc (abfd, len);
970 if (new_name == NULL)
973 memcpy (new_name + 1, name + 2, len - 1);
977 /* Make a BFD section from an ELF section. We store a pointer to the
978 BFD section in the bfd_section field of the header. */
981 _bfd_elf_make_section_from_shdr (bfd *abfd,
982 Elf_Internal_Shdr *hdr,
988 const struct elf_backend_data *bed;
990 if (hdr->bfd_section != NULL)
993 newsect = bfd_make_section_anyway (abfd, name);
997 hdr->bfd_section = newsect;
998 elf_section_data (newsect)->this_hdr = *hdr;
999 elf_section_data (newsect)->this_idx = shindex;
1001 /* Always use the real type/flags. */
1002 elf_section_type (newsect) = hdr->sh_type;
1003 elf_section_flags (newsect) = hdr->sh_flags;
1005 newsect->filepos = hdr->sh_offset;
1007 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
1008 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
1009 || ! bfd_set_section_alignment (abfd, newsect,
1010 bfd_log2 (hdr->sh_addralign)))
1013 flags = SEC_NO_FLAGS;
1014 if (hdr->sh_type != SHT_NOBITS)
1015 flags |= SEC_HAS_CONTENTS;
1016 if (hdr->sh_type == SHT_GROUP)
1018 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1021 if (hdr->sh_type != SHT_NOBITS)
1024 if ((hdr->sh_flags & SHF_WRITE) == 0)
1025 flags |= SEC_READONLY;
1026 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
1028 else if ((flags & SEC_LOAD) != 0)
1030 if ((hdr->sh_flags & SHF_MERGE) != 0)
1033 newsect->entsize = hdr->sh_entsize;
1035 if ((hdr->sh_flags & SHF_STRINGS) != 0)
1036 flags |= SEC_STRINGS;
1037 if (hdr->sh_flags & SHF_GROUP)
1038 if (!setup_group (abfd, hdr, newsect))
1040 if ((hdr->sh_flags & SHF_TLS) != 0)
1041 flags |= SEC_THREAD_LOCAL;
1042 if ((hdr->sh_flags & SHF_EXCLUDE) != 0)
1043 flags |= SEC_EXCLUDE;
1045 if ((flags & SEC_ALLOC) == 0)
1047 /* The debugging sections appear to be recognized only by name,
1048 not any sort of flag. Their SEC_ALLOC bits are cleared. */
1049 if (name [0] == '.')
1054 p = ".debug", n = 6;
1055 else if (name[1] == 'g' && name[2] == 'n')
1056 p = ".gnu.linkonce.wi.", n = 17;
1057 else if (name[1] == 'g' && name[2] == 'd')
1058 p = ".gdb_index", n = 11; /* yes we really do mean 11. */
1059 else if (name[1] == 'l')
1061 else if (name[1] == 's')
1063 else if (name[1] == 'z')
1064 p = ".zdebug", n = 7;
1067 if (p != NULL && strncmp (name, p, n) == 0)
1068 flags |= SEC_DEBUGGING;
1072 /* As a GNU extension, if the name begins with .gnu.linkonce, we
1073 only link a single copy of the section. This is used to support
1074 g++. g++ will emit each template expansion in its own section.
1075 The symbols will be defined as weak, so that multiple definitions
1076 are permitted. The GNU linker extension is to actually discard
1077 all but one of the sections. */
1078 if (CONST_STRNEQ (name, ".gnu.linkonce")
1079 && elf_next_in_group (newsect) == NULL)
1080 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1082 bed = get_elf_backend_data (abfd);
1083 if (bed->elf_backend_section_flags)
1084 if (! bed->elf_backend_section_flags (&flags, hdr))
1087 if (! bfd_set_section_flags (abfd, newsect, flags))
1090 /* We do not parse the PT_NOTE segments as we are interested even in the
1091 separate debug info files which may have the segments offsets corrupted.
1092 PT_NOTEs from the core files are currently not parsed using BFD. */
1093 if (hdr->sh_type == SHT_NOTE)
1097 if (!bfd_malloc_and_get_section (abfd, newsect, &contents))
1100 elf_parse_notes (abfd, (char *) contents, hdr->sh_size,
1101 hdr->sh_offset, hdr->sh_addralign);
1105 if ((flags & SEC_ALLOC) != 0)
1107 Elf_Internal_Phdr *phdr;
1108 unsigned int i, nload;
1110 /* Some ELF linkers produce binaries with all the program header
1111 p_paddr fields zero. If we have such a binary with more than
1112 one PT_LOAD header, then leave the section lma equal to vma
1113 so that we don't create sections with overlapping lma. */
1114 phdr = elf_tdata (abfd)->phdr;
1115 for (nload = 0, i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
1116 if (phdr->p_paddr != 0)
1118 else if (phdr->p_type == PT_LOAD && phdr->p_memsz != 0)
1120 if (i >= elf_elfheader (abfd)->e_phnum && nload > 1)
1123 phdr = elf_tdata (abfd)->phdr;
1124 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
1126 if (((phdr->p_type == PT_LOAD
1127 && (hdr->sh_flags & SHF_TLS) == 0)
1128 || phdr->p_type == PT_TLS)
1129 && ELF_SECTION_IN_SEGMENT (hdr, phdr))
1131 if ((flags & SEC_LOAD) == 0)
1132 newsect->lma = (phdr->p_paddr
1133 + hdr->sh_addr - phdr->p_vaddr);
1135 /* We used to use the same adjustment for SEC_LOAD
1136 sections, but that doesn't work if the segment
1137 is packed with code from multiple VMAs.
1138 Instead we calculate the section LMA based on
1139 the segment LMA. It is assumed that the
1140 segment will contain sections with contiguous
1141 LMAs, even if the VMAs are not. */
1142 newsect->lma = (phdr->p_paddr
1143 + hdr->sh_offset - phdr->p_offset);
1145 /* With contiguous segments, we can't tell from file
1146 offsets whether a section with zero size should
1147 be placed at the end of one segment or the
1148 beginning of the next. Decide based on vaddr. */
1149 if (hdr->sh_addr >= phdr->p_vaddr
1150 && (hdr->sh_addr + hdr->sh_size
1151 <= phdr->p_vaddr + phdr->p_memsz))
1157 /* Compress/decompress DWARF debug sections with names: .debug_* and
1158 .zdebug_*, after the section flags is set. */
1159 if ((flags & SEC_DEBUGGING)
1160 && ((name[1] == 'd' && name[6] == '_')
1161 || (name[1] == 'z' && name[7] == '_')))
1163 enum { nothing, compress, decompress } action = nothing;
1164 int compression_header_size;
1165 bfd_size_type uncompressed_size;
1166 bfd_boolean compressed
1167 = bfd_is_section_compressed_with_header (abfd, newsect,
1168 &compression_header_size,
1169 &uncompressed_size);
1173 /* Compressed section. Check if we should decompress. */
1174 if ((abfd->flags & BFD_DECOMPRESS))
1175 action = decompress;
1178 /* Compress the uncompressed section or convert from/to .zdebug*
1179 section. Check if we should compress. */
1180 if (action == nothing)
1182 if (newsect->size != 0
1183 && (abfd->flags & BFD_COMPRESS)
1184 && compression_header_size >= 0
1185 && uncompressed_size > 0
1187 || ((compression_header_size > 0)
1188 != ((abfd->flags & BFD_COMPRESS_GABI) != 0))))
1194 if (action == compress)
1196 if (!bfd_init_section_compress_status (abfd, newsect))
1199 /* xgettext:c-format */
1200 (_("%pB: unable to initialize compress status for section %s"),
1207 if (!bfd_init_section_decompress_status (abfd, newsect))
1210 /* xgettext:c-format */
1211 (_("%pB: unable to initialize decompress status for section %s"),
1217 if (abfd->is_linker_input)
1220 && (action == decompress
1221 || (action == compress
1222 && (abfd->flags & BFD_COMPRESS_GABI) != 0)))
1224 /* Convert section name from .zdebug_* to .debug_* so
1225 that linker will consider this section as a debug
1227 char *new_name = convert_zdebug_to_debug (abfd, name);
1228 if (new_name == NULL)
1230 bfd_rename_section (abfd, newsect, new_name);
1234 /* For objdump, don't rename the section. For objcopy, delay
1235 section rename to elf_fake_sections. */
1236 newsect->flags |= SEC_ELF_RENAME;
1242 const char *const bfd_elf_section_type_names[] =
1244 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1245 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1246 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1249 /* ELF relocs are against symbols. If we are producing relocatable
1250 output, and the reloc is against an external symbol, and nothing
1251 has given us any additional addend, the resulting reloc will also
1252 be against the same symbol. In such a case, we don't want to
1253 change anything about the way the reloc is handled, since it will
1254 all be done at final link time. Rather than put special case code
1255 into bfd_perform_relocation, all the reloc types use this howto
1256 function. It just short circuits the reloc if producing
1257 relocatable output against an external symbol. */
1259 bfd_reloc_status_type
1260 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1261 arelent *reloc_entry,
1263 void *data ATTRIBUTE_UNUSED,
1264 asection *input_section,
1266 char **error_message ATTRIBUTE_UNUSED)
1268 if (output_bfd != NULL
1269 && (symbol->flags & BSF_SECTION_SYM) == 0
1270 && (! reloc_entry->howto->partial_inplace
1271 || reloc_entry->addend == 0))
1273 reloc_entry->address += input_section->output_offset;
1274 return bfd_reloc_ok;
1277 return bfd_reloc_continue;
1280 /* Returns TRUE if section A matches section B.
1281 Names, addresses and links may be different, but everything else
1282 should be the same. */
1285 section_match (const Elf_Internal_Shdr * a,
1286 const Elf_Internal_Shdr * b)
1289 a->sh_type == b->sh_type
1290 && (a->sh_flags & ~ SHF_INFO_LINK)
1291 == (b->sh_flags & ~ SHF_INFO_LINK)
1292 && a->sh_addralign == b->sh_addralign
1293 && a->sh_size == b->sh_size
1294 && a->sh_entsize == b->sh_entsize
1295 /* FIXME: Check sh_addr ? */
1299 /* Find a section in OBFD that has the same characteristics
1300 as IHEADER. Return the index of this section or SHN_UNDEF if
1301 none can be found. Check's section HINT first, as this is likely
1302 to be the correct section. */
1305 find_link (const bfd *obfd, const Elf_Internal_Shdr *iheader,
1306 const unsigned int hint)
1308 Elf_Internal_Shdr ** oheaders = elf_elfsections (obfd);
1311 BFD_ASSERT (iheader != NULL);
1313 /* See PR 20922 for a reproducer of the NULL test. */
1314 if (hint < elf_numsections (obfd)
1315 && oheaders[hint] != NULL
1316 && section_match (oheaders[hint], iheader))
1319 for (i = 1; i < elf_numsections (obfd); i++)
1321 Elf_Internal_Shdr * oheader = oheaders[i];
1323 if (oheader == NULL)
1325 if (section_match (oheader, iheader))
1326 /* FIXME: Do we care if there is a potential for
1327 multiple matches ? */
1334 /* PR 19938: Attempt to set the ELF section header fields of an OS or
1335 Processor specific section, based upon a matching input section.
1336 Returns TRUE upon success, FALSE otherwise. */
1339 copy_special_section_fields (const bfd *ibfd,
1341 const Elf_Internal_Shdr *iheader,
1342 Elf_Internal_Shdr *oheader,
1343 const unsigned int secnum)
1345 const struct elf_backend_data *bed = get_elf_backend_data (obfd);
1346 const Elf_Internal_Shdr **iheaders = (const Elf_Internal_Shdr **) elf_elfsections (ibfd);
1347 bfd_boolean changed = FALSE;
1348 unsigned int sh_link;
1350 if (oheader->sh_type == SHT_NOBITS)
1352 /* This is a feature for objcopy --only-keep-debug:
1353 When a section's type is changed to NOBITS, we preserve
1354 the sh_link and sh_info fields so that they can be
1355 matched up with the original.
1357 Note: Strictly speaking these assignments are wrong.
1358 The sh_link and sh_info fields should point to the
1359 relevent sections in the output BFD, which may not be in
1360 the same location as they were in the input BFD. But
1361 the whole point of this action is to preserve the
1362 original values of the sh_link and sh_info fields, so
1363 that they can be matched up with the section headers in
1364 the original file. So strictly speaking we may be
1365 creating an invalid ELF file, but it is only for a file
1366 that just contains debug info and only for sections
1367 without any contents. */
1368 if (oheader->sh_link == 0)
1369 oheader->sh_link = iheader->sh_link;
1370 if (oheader->sh_info == 0)
1371 oheader->sh_info = iheader->sh_info;
1375 /* Allow the target a chance to decide how these fields should be set. */
1376 if (bed->elf_backend_copy_special_section_fields != NULL
1377 && bed->elf_backend_copy_special_section_fields
1378 (ibfd, obfd, iheader, oheader))
1381 /* We have an iheader which might match oheader, and which has non-zero
1382 sh_info and/or sh_link fields. Attempt to follow those links and find
1383 the section in the output bfd which corresponds to the linked section
1384 in the input bfd. */
1385 if (iheader->sh_link != SHN_UNDEF)
1387 /* See PR 20931 for a reproducer. */
1388 if (iheader->sh_link >= elf_numsections (ibfd))
1391 /* xgettext:c-format */
1392 (_("%pB: invalid sh_link field (%d) in section number %d"),
1393 ibfd, iheader->sh_link, secnum);
1397 sh_link = find_link (obfd, iheaders[iheader->sh_link], iheader->sh_link);
1398 if (sh_link != SHN_UNDEF)
1400 oheader->sh_link = sh_link;
1404 /* FIXME: Should we install iheader->sh_link
1405 if we could not find a match ? */
1407 /* xgettext:c-format */
1408 (_("%pB: failed to find link section for section %d"), obfd, secnum);
1411 if (iheader->sh_info)
1413 /* The sh_info field can hold arbitrary information, but if the
1414 SHF_LINK_INFO flag is set then it should be interpreted as a
1416 if (iheader->sh_flags & SHF_INFO_LINK)
1418 sh_link = find_link (obfd, iheaders[iheader->sh_info],
1420 if (sh_link != SHN_UNDEF)
1421 oheader->sh_flags |= SHF_INFO_LINK;
1424 /* No idea what it means - just copy it. */
1425 sh_link = iheader->sh_info;
1427 if (sh_link != SHN_UNDEF)
1429 oheader->sh_info = sh_link;
1434 /* xgettext:c-format */
1435 (_("%pB: failed to find info section for section %d"), obfd, secnum);
1441 /* Copy the program header and other data from one object module to
1445 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1447 const Elf_Internal_Shdr **iheaders = (const Elf_Internal_Shdr **) elf_elfsections (ibfd);
1448 Elf_Internal_Shdr **oheaders = elf_elfsections (obfd);
1449 const struct elf_backend_data *bed;
1452 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1453 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1456 if (!elf_flags_init (obfd))
1458 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1459 elf_flags_init (obfd) = TRUE;
1462 elf_gp (obfd) = elf_gp (ibfd);
1464 /* Also copy the EI_OSABI field. */
1465 elf_elfheader (obfd)->e_ident[EI_OSABI] =
1466 elf_elfheader (ibfd)->e_ident[EI_OSABI];
1468 /* If set, copy the EI_ABIVERSION field. */
1469 if (elf_elfheader (ibfd)->e_ident[EI_ABIVERSION])
1470 elf_elfheader (obfd)->e_ident[EI_ABIVERSION]
1471 = elf_elfheader (ibfd)->e_ident[EI_ABIVERSION];
1473 /* Copy object attributes. */
1474 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1476 if (iheaders == NULL || oheaders == NULL)
1479 bed = get_elf_backend_data (obfd);
1481 /* Possibly copy other fields in the section header. */
1482 for (i = 1; i < elf_numsections (obfd); i++)
1485 Elf_Internal_Shdr * oheader = oheaders[i];
1487 /* Ignore ordinary sections. SHT_NOBITS sections are considered however
1488 because of a special case need for generating separate debug info
1489 files. See below for more details. */
1491 || (oheader->sh_type != SHT_NOBITS
1492 && oheader->sh_type < SHT_LOOS))
1495 /* Ignore empty sections, and sections whose
1496 fields have already been initialised. */
1497 if (oheader->sh_size == 0
1498 || (oheader->sh_info != 0 && oheader->sh_link != 0))
1501 /* Scan for the matching section in the input bfd.
1502 First we try for a direct mapping between the input and output sections. */
1503 for (j = 1; j < elf_numsections (ibfd); j++)
1505 const Elf_Internal_Shdr * iheader = iheaders[j];
1507 if (iheader == NULL)
1510 if (oheader->bfd_section != NULL
1511 && iheader->bfd_section != NULL
1512 && iheader->bfd_section->output_section != NULL
1513 && iheader->bfd_section->output_section == oheader->bfd_section)
1515 /* We have found a connection from the input section to the
1516 output section. Attempt to copy the header fields. If
1517 this fails then do not try any further sections - there
1518 should only be a one-to-one mapping between input and output. */
1519 if (! copy_special_section_fields (ibfd, obfd, iheader, oheader, i))
1520 j = elf_numsections (ibfd);
1525 if (j < elf_numsections (ibfd))
1528 /* That failed. So try to deduce the corresponding input section.
1529 Unfortunately we cannot compare names as the output string table
1530 is empty, so instead we check size, address and type. */
1531 for (j = 1; j < elf_numsections (ibfd); j++)
1533 const Elf_Internal_Shdr * iheader = iheaders[j];
1535 if (iheader == NULL)
1538 /* Try matching fields in the input section's header.
1539 Since --only-keep-debug turns all non-debug sections into
1540 SHT_NOBITS sections, the output SHT_NOBITS type matches any
1542 if ((oheader->sh_type == SHT_NOBITS
1543 || iheader->sh_type == oheader->sh_type)
1544 && (iheader->sh_flags & ~ SHF_INFO_LINK)
1545 == (oheader->sh_flags & ~ SHF_INFO_LINK)
1546 && iheader->sh_addralign == oheader->sh_addralign
1547 && iheader->sh_entsize == oheader->sh_entsize
1548 && iheader->sh_size == oheader->sh_size
1549 && iheader->sh_addr == oheader->sh_addr
1550 && (iheader->sh_info != oheader->sh_info
1551 || iheader->sh_link != oheader->sh_link))
1553 if (copy_special_section_fields (ibfd, obfd, iheader, oheader, i))
1558 if (j == elf_numsections (ibfd) && oheader->sh_type >= SHT_LOOS)
1560 /* Final attempt. Call the backend copy function
1561 with a NULL input section. */
1562 if (bed->elf_backend_copy_special_section_fields != NULL)
1563 bed->elf_backend_copy_special_section_fields (ibfd, obfd, NULL, oheader);
1571 get_segment_type (unsigned int p_type)
1576 case PT_NULL: pt = "NULL"; break;
1577 case PT_LOAD: pt = "LOAD"; break;
1578 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1579 case PT_INTERP: pt = "INTERP"; break;
1580 case PT_NOTE: pt = "NOTE"; break;
1581 case PT_SHLIB: pt = "SHLIB"; break;
1582 case PT_PHDR: pt = "PHDR"; break;
1583 case PT_TLS: pt = "TLS"; break;
1584 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1585 case PT_GNU_STACK: pt = "STACK"; break;
1586 case PT_GNU_RELRO: pt = "RELRO"; break;
1587 default: pt = NULL; break;
1592 /* Print out the program headers. */
1595 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1597 FILE *f = (FILE *) farg;
1598 Elf_Internal_Phdr *p;
1600 bfd_byte *dynbuf = NULL;
1602 p = elf_tdata (abfd)->phdr;
1607 fprintf (f, _("\nProgram Header:\n"));
1608 c = elf_elfheader (abfd)->e_phnum;
1609 for (i = 0; i < c; i++, p++)
1611 const char *pt = get_segment_type (p->p_type);
1616 sprintf (buf, "0x%lx", p->p_type);
1619 fprintf (f, "%8s off 0x", pt);
1620 bfd_fprintf_vma (abfd, f, p->p_offset);
1621 fprintf (f, " vaddr 0x");
1622 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1623 fprintf (f, " paddr 0x");
1624 bfd_fprintf_vma (abfd, f, p->p_paddr);
1625 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1626 fprintf (f, " filesz 0x");
1627 bfd_fprintf_vma (abfd, f, p->p_filesz);
1628 fprintf (f, " memsz 0x");
1629 bfd_fprintf_vma (abfd, f, p->p_memsz);
1630 fprintf (f, " flags %c%c%c",
1631 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1632 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1633 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1634 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1635 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1640 s = bfd_get_section_by_name (abfd, ".dynamic");
1643 unsigned int elfsec;
1644 unsigned long shlink;
1645 bfd_byte *extdyn, *extdynend;
1647 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1649 fprintf (f, _("\nDynamic Section:\n"));
1651 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1654 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1655 if (elfsec == SHN_BAD)
1657 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1659 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1660 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1663 /* PR 17512: file: 6f427532. */
1664 if (s->size < extdynsize)
1666 extdynend = extdyn + s->size;
1667 /* PR 17512: file: id:000006,sig:06,src:000000,op:flip4,pos:5664.
1669 for (; extdyn <= (extdynend - extdynsize); extdyn += extdynsize)
1671 Elf_Internal_Dyn dyn;
1672 const char *name = "";
1674 bfd_boolean stringp;
1675 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1677 (*swap_dyn_in) (abfd, extdyn, &dyn);
1679 if (dyn.d_tag == DT_NULL)
1686 if (bed->elf_backend_get_target_dtag)
1687 name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag);
1689 if (!strcmp (name, ""))
1691 sprintf (ab, "%#" BFD_VMA_FMT "x", dyn.d_tag);
1696 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1697 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1698 case DT_PLTGOT: name = "PLTGOT"; break;
1699 case DT_HASH: name = "HASH"; break;
1700 case DT_STRTAB: name = "STRTAB"; break;
1701 case DT_SYMTAB: name = "SYMTAB"; break;
1702 case DT_RELA: name = "RELA"; break;
1703 case DT_RELASZ: name = "RELASZ"; break;
1704 case DT_RELAENT: name = "RELAENT"; break;
1705 case DT_STRSZ: name = "STRSZ"; break;
1706 case DT_SYMENT: name = "SYMENT"; break;
1707 case DT_INIT: name = "INIT"; break;
1708 case DT_FINI: name = "FINI"; break;
1709 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1710 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1711 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1712 case DT_REL: name = "REL"; break;
1713 case DT_RELSZ: name = "RELSZ"; break;
1714 case DT_RELENT: name = "RELENT"; break;
1715 case DT_PLTREL: name = "PLTREL"; break;
1716 case DT_DEBUG: name = "DEBUG"; break;
1717 case DT_TEXTREL: name = "TEXTREL"; break;
1718 case DT_JMPREL: name = "JMPREL"; break;
1719 case DT_BIND_NOW: name = "BIND_NOW"; break;
1720 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1721 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1722 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1723 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1724 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1725 case DT_FLAGS: name = "FLAGS"; break;
1726 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1727 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1728 case DT_CHECKSUM: name = "CHECKSUM"; break;
1729 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1730 case DT_MOVEENT: name = "MOVEENT"; break;
1731 case DT_MOVESZ: name = "MOVESZ"; break;
1732 case DT_FEATURE: name = "FEATURE"; break;
1733 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1734 case DT_SYMINSZ: name = "SYMINSZ"; break;
1735 case DT_SYMINENT: name = "SYMINENT"; break;
1736 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1737 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1738 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1739 case DT_PLTPAD: name = "PLTPAD"; break;
1740 case DT_MOVETAB: name = "MOVETAB"; break;
1741 case DT_SYMINFO: name = "SYMINFO"; break;
1742 case DT_RELACOUNT: name = "RELACOUNT"; break;
1743 case DT_RELCOUNT: name = "RELCOUNT"; break;
1744 case DT_FLAGS_1: name = "FLAGS_1"; break;
1745 case DT_VERSYM: name = "VERSYM"; break;
1746 case DT_VERDEF: name = "VERDEF"; break;
1747 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1748 case DT_VERNEED: name = "VERNEED"; break;
1749 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1750 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1751 case DT_USED: name = "USED"; break;
1752 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1753 case DT_GNU_HASH: name = "GNU_HASH"; break;
1756 fprintf (f, " %-20s ", name);
1760 bfd_fprintf_vma (abfd, f, dyn.d_un.d_val);
1765 unsigned int tagv = dyn.d_un.d_val;
1767 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1770 fprintf (f, "%s", string);
1779 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1780 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1782 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1786 if (elf_dynverdef (abfd) != 0)
1788 Elf_Internal_Verdef *t;
1790 fprintf (f, _("\nVersion definitions:\n"));
1791 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1793 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1794 t->vd_flags, t->vd_hash,
1795 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1796 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1798 Elf_Internal_Verdaux *a;
1801 for (a = t->vd_auxptr->vda_nextptr;
1805 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1811 if (elf_dynverref (abfd) != 0)
1813 Elf_Internal_Verneed *t;
1815 fprintf (f, _("\nVersion References:\n"));
1816 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1818 Elf_Internal_Vernaux *a;
1820 fprintf (f, _(" required from %s:\n"),
1821 t->vn_filename ? t->vn_filename : "<corrupt>");
1822 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1823 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1824 a->vna_flags, a->vna_other,
1825 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1837 /* Get version string. */
1840 _bfd_elf_get_symbol_version_string (bfd *abfd, asymbol *symbol,
1841 bfd_boolean *hidden)
1843 const char *version_string = NULL;
1844 if (elf_dynversym (abfd) != 0
1845 && (elf_dynverdef (abfd) != 0 || elf_dynverref (abfd) != 0))
1847 unsigned int vernum = ((elf_symbol_type *) symbol)->version;
1849 *hidden = (vernum & VERSYM_HIDDEN) != 0;
1850 vernum &= VERSYM_VERSION;
1853 version_string = "";
1854 else if (vernum == 1)
1855 version_string = "Base";
1856 else if (vernum <= elf_tdata (abfd)->cverdefs)
1858 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1861 Elf_Internal_Verneed *t;
1863 version_string = "";
1864 for (t = elf_tdata (abfd)->verref;
1868 Elf_Internal_Vernaux *a;
1870 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1872 if (a->vna_other == vernum)
1874 version_string = a->vna_nodename;
1881 return version_string;
1884 /* Display ELF-specific fields of a symbol. */
1887 bfd_elf_print_symbol (bfd *abfd,
1890 bfd_print_symbol_type how)
1892 FILE *file = (FILE *) filep;
1895 case bfd_print_symbol_name:
1896 fprintf (file, "%s", symbol->name);
1898 case bfd_print_symbol_more:
1899 fprintf (file, "elf ");
1900 bfd_fprintf_vma (abfd, file, symbol->value);
1901 fprintf (file, " %x", symbol->flags);
1903 case bfd_print_symbol_all:
1905 const char *section_name;
1906 const char *name = NULL;
1907 const struct elf_backend_data *bed;
1908 unsigned char st_other;
1910 const char *version_string;
1913 section_name = symbol->section ? symbol->section->name : "(*none*)";
1915 bed = get_elf_backend_data (abfd);
1916 if (bed->elf_backend_print_symbol_all)
1917 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1921 name = symbol->name;
1922 bfd_print_symbol_vandf (abfd, file, symbol);
1925 fprintf (file, " %s\t", section_name);
1926 /* Print the "other" value for a symbol. For common symbols,
1927 we've already printed the size; now print the alignment.
1928 For other symbols, we have no specified alignment, and
1929 we've printed the address; now print the size. */
1930 if (symbol->section && bfd_is_com_section (symbol->section))
1931 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1933 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1934 bfd_fprintf_vma (abfd, file, val);
1936 /* If we have version information, print it. */
1937 version_string = _bfd_elf_get_symbol_version_string (abfd,
1943 fprintf (file, " %-11s", version_string);
1948 fprintf (file, " (%s)", version_string);
1949 for (i = 10 - strlen (version_string); i > 0; --i)
1954 /* If the st_other field is not zero, print it. */
1955 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1960 case STV_INTERNAL: fprintf (file, " .internal"); break;
1961 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1962 case STV_PROTECTED: fprintf (file, " .protected"); break;
1964 /* Some other non-defined flags are also present, so print
1966 fprintf (file, " 0x%02x", (unsigned int) st_other);
1969 fprintf (file, " %s", name);
1975 /* ELF .o/exec file reading */
1977 /* Create a new bfd section from an ELF section header. */
1980 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1982 Elf_Internal_Shdr *hdr;
1983 Elf_Internal_Ehdr *ehdr;
1984 const struct elf_backend_data *bed;
1986 bfd_boolean ret = TRUE;
1987 static bfd_boolean * sections_being_created = NULL;
1988 static bfd * sections_being_created_abfd = NULL;
1989 static unsigned int nesting = 0;
1991 if (shindex >= elf_numsections (abfd))
1996 /* PR17512: A corrupt ELF binary might contain a recursive group of
1997 sections, with each the string indicies pointing to the next in the
1998 loop. Detect this here, by refusing to load a section that we are
1999 already in the process of loading. We only trigger this test if
2000 we have nested at least three sections deep as normal ELF binaries
2001 can expect to recurse at least once.
2003 FIXME: It would be better if this array was attached to the bfd,
2004 rather than being held in a static pointer. */
2006 if (sections_being_created_abfd != abfd)
2007 sections_being_created = NULL;
2008 if (sections_being_created == NULL)
2010 /* FIXME: It would be more efficient to attach this array to the bfd somehow. */
2011 sections_being_created = (bfd_boolean *)
2012 bfd_zalloc (abfd, elf_numsections (abfd) * sizeof (bfd_boolean));
2013 sections_being_created_abfd = abfd;
2015 if (sections_being_created [shindex])
2018 (_("%pB: warning: loop in section dependencies detected"), abfd);
2021 sections_being_created [shindex] = TRUE;
2024 hdr = elf_elfsections (abfd)[shindex];
2025 ehdr = elf_elfheader (abfd);
2026 name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx,
2031 bed = get_elf_backend_data (abfd);
2032 switch (hdr->sh_type)
2035 /* Inactive section. Throw it away. */
2038 case SHT_PROGBITS: /* Normal section with contents. */
2039 case SHT_NOBITS: /* .bss section. */
2040 case SHT_HASH: /* .hash section. */
2041 case SHT_NOTE: /* .note section. */
2042 case SHT_INIT_ARRAY: /* .init_array section. */
2043 case SHT_FINI_ARRAY: /* .fini_array section. */
2044 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
2045 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
2046 case SHT_GNU_HASH: /* .gnu.hash section. */
2047 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2050 case SHT_DYNAMIC: /* Dynamic linking information. */
2051 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2054 if (hdr->sh_link > elf_numsections (abfd))
2056 /* PR 10478: Accept Solaris binaries with a sh_link
2057 field set to SHN_BEFORE or SHN_AFTER. */
2058 switch (bfd_get_arch (abfd))
2061 case bfd_arch_sparc:
2062 if (hdr->sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
2063 || hdr->sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
2065 /* Otherwise fall through. */
2070 else if (elf_elfsections (abfd)[hdr->sh_link] == NULL)
2072 else if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
2074 Elf_Internal_Shdr *dynsymhdr;
2076 /* The shared libraries distributed with hpux11 have a bogus
2077 sh_link field for the ".dynamic" section. Find the
2078 string table for the ".dynsym" section instead. */
2079 if (elf_dynsymtab (abfd) != 0)
2081 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
2082 hdr->sh_link = dynsymhdr->sh_link;
2086 unsigned int i, num_sec;
2088 num_sec = elf_numsections (abfd);
2089 for (i = 1; i < num_sec; i++)
2091 dynsymhdr = elf_elfsections (abfd)[i];
2092 if (dynsymhdr->sh_type == SHT_DYNSYM)
2094 hdr->sh_link = dynsymhdr->sh_link;
2102 case SHT_SYMTAB: /* A symbol table. */
2103 if (elf_onesymtab (abfd) == shindex)
2106 if (hdr->sh_entsize != bed->s->sizeof_sym)
2109 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
2111 if (hdr->sh_size != 0)
2113 /* Some assemblers erroneously set sh_info to one with a
2114 zero sh_size. ld sees this as a global symbol count
2115 of (unsigned) -1. Fix it here. */
2120 /* PR 18854: A binary might contain more than one symbol table.
2121 Unusual, but possible. Warn, but continue. */
2122 if (elf_onesymtab (abfd) != 0)
2125 /* xgettext:c-format */
2126 (_("%pB: warning: multiple symbol tables detected"
2127 " - ignoring the table in section %u"),
2131 elf_onesymtab (abfd) = shindex;
2132 elf_symtab_hdr (abfd) = *hdr;
2133 elf_elfsections (abfd)[shindex] = hdr = & elf_symtab_hdr (abfd);
2134 abfd->flags |= HAS_SYMS;
2136 /* Sometimes a shared object will map in the symbol table. If
2137 SHF_ALLOC is set, and this is a shared object, then we also
2138 treat this section as a BFD section. We can not base the
2139 decision purely on SHF_ALLOC, because that flag is sometimes
2140 set in a relocatable object file, which would confuse the
2142 if ((hdr->sh_flags & SHF_ALLOC) != 0
2143 && (abfd->flags & DYNAMIC) != 0
2144 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2148 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
2149 can't read symbols without that section loaded as well. It
2150 is most likely specified by the next section header. */
2152 elf_section_list * entry;
2153 unsigned int i, num_sec;
2155 for (entry = elf_symtab_shndx_list (abfd); entry != NULL; entry = entry->next)
2156 if (entry->hdr.sh_link == shindex)
2159 num_sec = elf_numsections (abfd);
2160 for (i = shindex + 1; i < num_sec; i++)
2162 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2164 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
2165 && hdr2->sh_link == shindex)
2170 for (i = 1; i < shindex; i++)
2172 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2174 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
2175 && hdr2->sh_link == shindex)
2180 ret = bfd_section_from_shdr (abfd, i);
2181 /* else FIXME: we have failed to find the symbol table - should we issue an error ? */
2185 case SHT_DYNSYM: /* A dynamic symbol table. */
2186 if (elf_dynsymtab (abfd) == shindex)
2189 if (hdr->sh_entsize != bed->s->sizeof_sym)
2192 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
2194 if (hdr->sh_size != 0)
2197 /* Some linkers erroneously set sh_info to one with a
2198 zero sh_size. ld sees this as a global symbol count
2199 of (unsigned) -1. Fix it here. */
2204 /* PR 18854: A binary might contain more than one dynamic symbol table.
2205 Unusual, but possible. Warn, but continue. */
2206 if (elf_dynsymtab (abfd) != 0)
2209 /* xgettext:c-format */
2210 (_("%pB: warning: multiple dynamic symbol tables detected"
2211 " - ignoring the table in section %u"),
2215 elf_dynsymtab (abfd) = shindex;
2216 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
2217 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
2218 abfd->flags |= HAS_SYMS;
2220 /* Besides being a symbol table, we also treat this as a regular
2221 section, so that objcopy can handle it. */
2222 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2225 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections. */
2227 elf_section_list * entry;
2229 for (entry = elf_symtab_shndx_list (abfd); entry != NULL; entry = entry->next)
2230 if (entry->ndx == shindex)
2233 entry = bfd_alloc (abfd, sizeof * entry);
2236 entry->ndx = shindex;
2238 entry->next = elf_symtab_shndx_list (abfd);
2239 elf_symtab_shndx_list (abfd) = entry;
2240 elf_elfsections (abfd)[shindex] = & entry->hdr;
2244 case SHT_STRTAB: /* A string table. */
2245 if (hdr->bfd_section != NULL)
2248 if (ehdr->e_shstrndx == shindex)
2250 elf_tdata (abfd)->shstrtab_hdr = *hdr;
2251 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
2255 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
2258 elf_tdata (abfd)->strtab_hdr = *hdr;
2259 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
2263 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
2266 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
2267 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
2268 elf_elfsections (abfd)[shindex] = hdr;
2269 /* We also treat this as a regular section, so that objcopy
2271 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2276 /* If the string table isn't one of the above, then treat it as a
2277 regular section. We need to scan all the headers to be sure,
2278 just in case this strtab section appeared before the above. */
2279 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
2281 unsigned int i, num_sec;
2283 num_sec = elf_numsections (abfd);
2284 for (i = 1; i < num_sec; i++)
2286 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2287 if (hdr2->sh_link == shindex)
2289 /* Prevent endless recursion on broken objects. */
2292 if (! bfd_section_from_shdr (abfd, i))
2294 if (elf_onesymtab (abfd) == i)
2296 if (elf_dynsymtab (abfd) == i)
2297 goto dynsymtab_strtab;
2301 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2306 /* *These* do a lot of work -- but build no sections! */
2308 asection *target_sect;
2309 Elf_Internal_Shdr *hdr2, **p_hdr;
2310 unsigned int num_sec = elf_numsections (abfd);
2311 struct bfd_elf_section_data *esdt;
2314 != (bfd_size_type) (hdr->sh_type == SHT_REL
2315 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
2318 /* Check for a bogus link to avoid crashing. */
2319 if (hdr->sh_link >= num_sec)
2322 /* xgettext:c-format */
2323 (_("%pB: invalid link %u for reloc section %s (index %u)"),
2324 abfd, hdr->sh_link, name, shindex);
2325 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2330 /* For some incomprehensible reason Oracle distributes
2331 libraries for Solaris in which some of the objects have
2332 bogus sh_link fields. It would be nice if we could just
2333 reject them, but, unfortunately, some people need to use
2334 them. We scan through the section headers; if we find only
2335 one suitable symbol table, we clobber the sh_link to point
2336 to it. I hope this doesn't break anything.
2338 Don't do it on executable nor shared library. */
2339 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0
2340 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
2341 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
2347 for (scan = 1; scan < num_sec; scan++)
2349 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
2350 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
2361 hdr->sh_link = found;
2364 /* Get the symbol table. */
2365 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
2366 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
2367 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
2370 /* If this reloc section does not use the main symbol table we
2371 don't treat it as a reloc section. BFD can't adequately
2372 represent such a section, so at least for now, we don't
2373 try. We just present it as a normal section. We also
2374 can't use it as a reloc section if it points to the null
2375 section, an invalid section, another reloc section, or its
2376 sh_link points to the null section. */
2377 if (hdr->sh_link != elf_onesymtab (abfd)
2378 || hdr->sh_link == SHN_UNDEF
2379 || hdr->sh_info == SHN_UNDEF
2380 || hdr->sh_info >= num_sec
2381 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
2382 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
2384 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2389 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
2392 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
2393 if (target_sect == NULL)
2396 esdt = elf_section_data (target_sect);
2397 if (hdr->sh_type == SHT_RELA)
2398 p_hdr = &esdt->rela.hdr;
2400 p_hdr = &esdt->rel.hdr;
2402 /* PR 17512: file: 0b4f81b7. */
2405 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2));
2410 elf_elfsections (abfd)[shindex] = hdr2;
2411 target_sect->reloc_count += (NUM_SHDR_ENTRIES (hdr)
2412 * bed->s->int_rels_per_ext_rel);
2413 target_sect->flags |= SEC_RELOC;
2414 target_sect->relocation = NULL;
2415 target_sect->rel_filepos = hdr->sh_offset;
2416 /* In the section to which the relocations apply, mark whether
2417 its relocations are of the REL or RELA variety. */
2418 if (hdr->sh_size != 0)
2420 if (hdr->sh_type == SHT_RELA)
2421 target_sect->use_rela_p = 1;
2423 abfd->flags |= HAS_RELOC;
2427 case SHT_GNU_verdef:
2428 elf_dynverdef (abfd) = shindex;
2429 elf_tdata (abfd)->dynverdef_hdr = *hdr;
2430 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2433 case SHT_GNU_versym:
2434 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
2437 elf_dynversym (abfd) = shindex;
2438 elf_tdata (abfd)->dynversym_hdr = *hdr;
2439 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2442 case SHT_GNU_verneed:
2443 elf_dynverref (abfd) = shindex;
2444 elf_tdata (abfd)->dynverref_hdr = *hdr;
2445 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2452 if (! IS_VALID_GROUP_SECTION_HEADER (hdr, GRP_ENTRY_SIZE))
2455 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2461 /* Possibly an attributes section. */
2462 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
2463 || hdr->sh_type == bed->obj_attrs_section_type)
2465 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2467 _bfd_elf_parse_attributes (abfd, hdr);
2471 /* Check for any processor-specific section types. */
2472 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
2475 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
2477 if ((hdr->sh_flags & SHF_ALLOC) != 0)
2478 /* FIXME: How to properly handle allocated section reserved
2479 for applications? */
2481 /* xgettext:c-format */
2482 (_("%pB: unknown type [%#x] section `%s'"),
2483 abfd, hdr->sh_type, name);
2486 /* Allow sections reserved for applications. */
2487 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2492 else if (hdr->sh_type >= SHT_LOPROC
2493 && hdr->sh_type <= SHT_HIPROC)
2494 /* FIXME: We should handle this section. */
2496 /* xgettext:c-format */
2497 (_("%pB: unknown type [%#x] section `%s'"),
2498 abfd, hdr->sh_type, name);
2499 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
2501 /* Unrecognised OS-specific sections. */
2502 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
2503 /* SHF_OS_NONCONFORMING indicates that special knowledge is
2504 required to correctly process the section and the file should
2505 be rejected with an error message. */
2507 /* xgettext:c-format */
2508 (_("%pB: unknown type [%#x] section `%s'"),
2509 abfd, hdr->sh_type, name);
2512 /* Otherwise it should be processed. */
2513 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2518 /* FIXME: We should handle this section. */
2520 /* xgettext:c-format */
2521 (_("%pB: unknown type [%#x] section `%s'"),
2522 abfd, hdr->sh_type, name);
2530 if (sections_being_created && sections_being_created_abfd == abfd)
2531 sections_being_created [shindex] = FALSE;
2532 if (-- nesting == 0)
2534 sections_being_created = NULL;
2535 sections_being_created_abfd = abfd;
2540 /* Return the local symbol specified by ABFD, R_SYMNDX. */
2543 bfd_sym_from_r_symndx (struct sym_cache *cache,
2545 unsigned long r_symndx)
2547 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2549 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
2551 Elf_Internal_Shdr *symtab_hdr;
2552 unsigned char esym[sizeof (Elf64_External_Sym)];
2553 Elf_External_Sym_Shndx eshndx;
2555 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2556 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2557 &cache->sym[ent], esym, &eshndx) == NULL)
2560 if (cache->abfd != abfd)
2562 memset (cache->indx, -1, sizeof (cache->indx));
2565 cache->indx[ent] = r_symndx;
2568 return &cache->sym[ent];
2571 /* Given an ELF section number, retrieve the corresponding BFD
2575 bfd_section_from_elf_index (bfd *abfd, unsigned int sec_index)
2577 if (sec_index >= elf_numsections (abfd))
2579 return elf_elfsections (abfd)[sec_index]->bfd_section;
2582 static const struct bfd_elf_special_section special_sections_b[] =
2584 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2585 { NULL, 0, 0, 0, 0 }
2588 static const struct bfd_elf_special_section special_sections_c[] =
2590 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
2591 { NULL, 0, 0, 0, 0 }
2594 static const struct bfd_elf_special_section special_sections_d[] =
2596 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2597 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2598 /* There are more DWARF sections than these, but they needn't be added here
2599 unless you have to cope with broken compilers that don't emit section
2600 attributes or you want to help the user writing assembler. */
2601 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
2602 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
2603 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
2604 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
2605 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
2606 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
2607 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
2608 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
2609 { NULL, 0, 0, 0, 0 }
2612 static const struct bfd_elf_special_section special_sections_f[] =
2614 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2615 { STRING_COMMA_LEN (".fini_array"), -2, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2616 { NULL, 0 , 0, 0, 0 }
2619 static const struct bfd_elf_special_section special_sections_g[] =
2621 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2622 { STRING_COMMA_LEN (".gnu.lto_"), -1, SHT_PROGBITS, SHF_EXCLUDE },
2623 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2624 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2625 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2626 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2627 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2628 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2629 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2630 { NULL, 0, 0, 0, 0 }
2633 static const struct bfd_elf_special_section special_sections_h[] =
2635 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2636 { NULL, 0, 0, 0, 0 }
2639 static const struct bfd_elf_special_section special_sections_i[] =
2641 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2642 { STRING_COMMA_LEN (".init_array"), -2, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2643 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2644 { NULL, 0, 0, 0, 0 }
2647 static const struct bfd_elf_special_section special_sections_l[] =
2649 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2650 { NULL, 0, 0, 0, 0 }
2653 static const struct bfd_elf_special_section special_sections_n[] =
2655 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2656 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2657 { NULL, 0, 0, 0, 0 }
2660 static const struct bfd_elf_special_section special_sections_p[] =
2662 { STRING_COMMA_LEN (".preinit_array"), -2, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2663 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2664 { NULL, 0, 0, 0, 0 }
2667 static const struct bfd_elf_special_section special_sections_r[] =
2669 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2670 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2671 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2672 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2673 { NULL, 0, 0, 0, 0 }
2676 static const struct bfd_elf_special_section special_sections_s[] =
2678 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2679 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2680 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2681 /* See struct bfd_elf_special_section declaration for the semantics of
2682 this special case where .prefix_length != strlen (.prefix). */
2683 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2684 { NULL, 0, 0, 0, 0 }
2687 static const struct bfd_elf_special_section special_sections_t[] =
2689 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2690 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2691 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2692 { NULL, 0, 0, 0, 0 }
2695 static const struct bfd_elf_special_section special_sections_z[] =
2697 { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 },
2698 { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 },
2699 { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 },
2700 { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 },
2701 { NULL, 0, 0, 0, 0 }
2704 static const struct bfd_elf_special_section * const special_sections[] =
2706 special_sections_b, /* 'b' */
2707 special_sections_c, /* 'c' */
2708 special_sections_d, /* 'd' */
2710 special_sections_f, /* 'f' */
2711 special_sections_g, /* 'g' */
2712 special_sections_h, /* 'h' */
2713 special_sections_i, /* 'i' */
2716 special_sections_l, /* 'l' */
2718 special_sections_n, /* 'n' */
2720 special_sections_p, /* 'p' */
2722 special_sections_r, /* 'r' */
2723 special_sections_s, /* 's' */
2724 special_sections_t, /* 't' */
2730 special_sections_z /* 'z' */
2733 const struct bfd_elf_special_section *
2734 _bfd_elf_get_special_section (const char *name,
2735 const struct bfd_elf_special_section *spec,
2741 len = strlen (name);
2743 for (i = 0; spec[i].prefix != NULL; i++)
2746 int prefix_len = spec[i].prefix_length;
2748 if (len < prefix_len)
2750 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2753 suffix_len = spec[i].suffix_length;
2754 if (suffix_len <= 0)
2756 if (name[prefix_len] != 0)
2758 if (suffix_len == 0)
2760 if (name[prefix_len] != '.'
2761 && (suffix_len == -2
2762 || (rela && spec[i].type == SHT_REL)))
2768 if (len < prefix_len + suffix_len)
2770 if (memcmp (name + len - suffix_len,
2771 spec[i].prefix + prefix_len,
2781 const struct bfd_elf_special_section *
2782 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2785 const struct bfd_elf_special_section *spec;
2786 const struct elf_backend_data *bed;
2788 /* See if this is one of the special sections. */
2789 if (sec->name == NULL)
2792 bed = get_elf_backend_data (abfd);
2793 spec = bed->special_sections;
2796 spec = _bfd_elf_get_special_section (sec->name,
2797 bed->special_sections,
2803 if (sec->name[0] != '.')
2806 i = sec->name[1] - 'b';
2807 if (i < 0 || i > 'z' - 'b')
2810 spec = special_sections[i];
2815 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2819 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2821 struct bfd_elf_section_data *sdata;
2822 const struct elf_backend_data *bed;
2823 const struct bfd_elf_special_section *ssect;
2825 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2828 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd,
2832 sec->used_by_bfd = sdata;
2835 /* Indicate whether or not this section should use RELA relocations. */
2836 bed = get_elf_backend_data (abfd);
2837 sec->use_rela_p = bed->default_use_rela_p;
2839 /* When we read a file, we don't need to set ELF section type and
2840 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2841 anyway. We will set ELF section type and flags for all linker
2842 created sections. If user specifies BFD section flags, we will
2843 set ELF section type and flags based on BFD section flags in
2844 elf_fake_sections. Special handling for .init_array/.fini_array
2845 output sections since they may contain .ctors/.dtors input
2846 sections. We don't want _bfd_elf_init_private_section_data to
2847 copy ELF section type from .ctors/.dtors input sections. */
2848 if (abfd->direction != read_direction
2849 || (sec->flags & SEC_LINKER_CREATED) != 0)
2851 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2854 || (sec->flags & SEC_LINKER_CREATED) != 0
2855 || ssect->type == SHT_INIT_ARRAY
2856 || ssect->type == SHT_FINI_ARRAY))
2858 elf_section_type (sec) = ssect->type;
2859 elf_section_flags (sec) = ssect->attr;
2863 return _bfd_generic_new_section_hook (abfd, sec);
2866 /* Create a new bfd section from an ELF program header.
2868 Since program segments have no names, we generate a synthetic name
2869 of the form segment<NUM>, where NUM is generally the index in the
2870 program header table. For segments that are split (see below) we
2871 generate the names segment<NUM>a and segment<NUM>b.
2873 Note that some program segments may have a file size that is different than
2874 (less than) the memory size. All this means is that at execution the
2875 system must allocate the amount of memory specified by the memory size,
2876 but only initialize it with the first "file size" bytes read from the
2877 file. This would occur for example, with program segments consisting
2878 of combined data+bss.
2880 To handle the above situation, this routine generates TWO bfd sections
2881 for the single program segment. The first has the length specified by
2882 the file size of the segment, and the second has the length specified
2883 by the difference between the two sizes. In effect, the segment is split
2884 into its initialized and uninitialized parts.
2889 _bfd_elf_make_section_from_phdr (bfd *abfd,
2890 Elf_Internal_Phdr *hdr,
2892 const char *type_name)
2900 split = ((hdr->p_memsz > 0)
2901 && (hdr->p_filesz > 0)
2902 && (hdr->p_memsz > hdr->p_filesz));
2904 if (hdr->p_filesz > 0)
2906 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "a" : "");
2907 len = strlen (namebuf) + 1;
2908 name = (char *) bfd_alloc (abfd, len);
2911 memcpy (name, namebuf, len);
2912 newsect = bfd_make_section (abfd, name);
2913 if (newsect == NULL)
2915 newsect->vma = hdr->p_vaddr;
2916 newsect->lma = hdr->p_paddr;
2917 newsect->size = hdr->p_filesz;
2918 newsect->filepos = hdr->p_offset;
2919 newsect->flags |= SEC_HAS_CONTENTS;
2920 newsect->alignment_power = bfd_log2 (hdr->p_align);
2921 if (hdr->p_type == PT_LOAD)
2923 newsect->flags |= SEC_ALLOC;
2924 newsect->flags |= SEC_LOAD;
2925 if (hdr->p_flags & PF_X)
2927 /* FIXME: all we known is that it has execute PERMISSION,
2929 newsect->flags |= SEC_CODE;
2932 if (!(hdr->p_flags & PF_W))
2934 newsect->flags |= SEC_READONLY;
2938 if (hdr->p_memsz > hdr->p_filesz)
2942 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "b" : "");
2943 len = strlen (namebuf) + 1;
2944 name = (char *) bfd_alloc (abfd, len);
2947 memcpy (name, namebuf, len);
2948 newsect = bfd_make_section (abfd, name);
2949 if (newsect == NULL)
2951 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2952 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2953 newsect->size = hdr->p_memsz - hdr->p_filesz;
2954 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2955 align = newsect->vma & -newsect->vma;
2956 if (align == 0 || align > hdr->p_align)
2957 align = hdr->p_align;
2958 newsect->alignment_power = bfd_log2 (align);
2959 if (hdr->p_type == PT_LOAD)
2961 /* Hack for gdb. Segments that have not been modified do
2962 not have their contents written to a core file, on the
2963 assumption that a debugger can find the contents in the
2964 executable. We flag this case by setting the fake
2965 section size to zero. Note that "real" bss sections will
2966 always have their contents dumped to the core file. */
2967 if (bfd_get_format (abfd) == bfd_core)
2969 newsect->flags |= SEC_ALLOC;
2970 if (hdr->p_flags & PF_X)
2971 newsect->flags |= SEC_CODE;
2973 if (!(hdr->p_flags & PF_W))
2974 newsect->flags |= SEC_READONLY;
2981 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int hdr_index)
2983 const struct elf_backend_data *bed;
2985 switch (hdr->p_type)
2988 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "null");
2991 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "load");
2994 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "dynamic");
2997 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "interp");
3000 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "note"))
3002 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz,
3008 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "shlib");
3011 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "phdr");
3013 case PT_GNU_EH_FRAME:
3014 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index,
3018 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "stack");
3021 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "relro");
3024 /* Check for any processor-specific program segment types. */
3025 bed = get_elf_backend_data (abfd);
3026 return bed->elf_backend_section_from_phdr (abfd, hdr, hdr_index, "proc");
3030 /* Return the REL_HDR for SEC, assuming there is only a single one, either
3034 _bfd_elf_single_rel_hdr (asection *sec)
3036 if (elf_section_data (sec)->rel.hdr)
3038 BFD_ASSERT (elf_section_data (sec)->rela.hdr == NULL);
3039 return elf_section_data (sec)->rel.hdr;
3042 return elf_section_data (sec)->rela.hdr;
3046 _bfd_elf_set_reloc_sh_name (bfd *abfd,
3047 Elf_Internal_Shdr *rel_hdr,
3048 const char *sec_name,
3049 bfd_boolean use_rela_p)
3051 char *name = (char *) bfd_alloc (abfd,
3052 sizeof ".rela" + strlen (sec_name));
3056 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", sec_name);
3058 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
3060 if (rel_hdr->sh_name == (unsigned int) -1)
3066 /* Allocate and initialize a section-header for a new reloc section,
3067 containing relocations against ASECT. It is stored in RELDATA. If
3068 USE_RELA_P is TRUE, we use RELA relocations; otherwise, we use REL
3072 _bfd_elf_init_reloc_shdr (bfd *abfd,
3073 struct bfd_elf_section_reloc_data *reldata,
3074 const char *sec_name,
3075 bfd_boolean use_rela_p,
3076 bfd_boolean delay_st_name_p)
3078 Elf_Internal_Shdr *rel_hdr;
3079 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3081 BFD_ASSERT (reldata->hdr == NULL);
3082 rel_hdr = bfd_zalloc (abfd, sizeof (*rel_hdr));
3083 reldata->hdr = rel_hdr;
3085 if (delay_st_name_p)
3086 rel_hdr->sh_name = (unsigned int) -1;
3087 else if (!_bfd_elf_set_reloc_sh_name (abfd, rel_hdr, sec_name,
3090 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
3091 rel_hdr->sh_entsize = (use_rela_p
3092 ? bed->s->sizeof_rela
3093 : bed->s->sizeof_rel);
3094 rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
3095 rel_hdr->sh_flags = 0;
3096 rel_hdr->sh_addr = 0;
3097 rel_hdr->sh_size = 0;
3098 rel_hdr->sh_offset = 0;
3103 /* Return the default section type based on the passed in section flags. */
3106 bfd_elf_get_default_section_type (flagword flags)
3108 if ((flags & SEC_ALLOC) != 0
3109 && (flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
3111 return SHT_PROGBITS;
3114 struct fake_section_arg
3116 struct bfd_link_info *link_info;
3120 /* Set up an ELF internal section header for a section. */
3123 elf_fake_sections (bfd *abfd, asection *asect, void *fsarg)
3125 struct fake_section_arg *arg = (struct fake_section_arg *)fsarg;
3126 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3127 struct bfd_elf_section_data *esd = elf_section_data (asect);
3128 Elf_Internal_Shdr *this_hdr;
3129 unsigned int sh_type;
3130 const char *name = asect->name;
3131 bfd_boolean delay_st_name_p = FALSE;
3135 /* We already failed; just get out of the bfd_map_over_sections
3140 this_hdr = &esd->this_hdr;
3144 /* ld: compress DWARF debug sections with names: .debug_*. */
3145 if ((arg->link_info->compress_debug & COMPRESS_DEBUG)
3146 && (asect->flags & SEC_DEBUGGING)
3150 /* Set SEC_ELF_COMPRESS to indicate this section should be
3152 asect->flags |= SEC_ELF_COMPRESS;
3154 /* If this section will be compressed, delay adding section
3155 name to section name section after it is compressed in
3156 _bfd_elf_assign_file_positions_for_non_load. */
3157 delay_st_name_p = TRUE;
3160 else if ((asect->flags & SEC_ELF_RENAME))
3162 /* objcopy: rename output DWARF debug section. */
3163 if ((abfd->flags & (BFD_DECOMPRESS | BFD_COMPRESS_GABI)))
3165 /* When we decompress or compress with SHF_COMPRESSED,
3166 convert section name from .zdebug_* to .debug_* if
3170 char *new_name = convert_zdebug_to_debug (abfd, name);
3171 if (new_name == NULL)
3179 else if (asect->compress_status == COMPRESS_SECTION_DONE)
3181 /* PR binutils/18087: Compression does not always make a
3182 section smaller. So only rename the section when
3183 compression has actually taken place. If input section
3184 name is .zdebug_*, we should never compress it again. */
3185 char *new_name = convert_debug_to_zdebug (abfd, name);
3186 if (new_name == NULL)
3191 BFD_ASSERT (name[1] != 'z');
3196 if (delay_st_name_p)
3197 this_hdr->sh_name = (unsigned int) -1;
3201 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3203 if (this_hdr->sh_name == (unsigned int) -1)
3210 /* Don't clear sh_flags. Assembler may set additional bits. */
3212 if ((asect->flags & SEC_ALLOC) != 0
3213 || asect->user_set_vma)
3214 this_hdr->sh_addr = asect->vma;
3216 this_hdr->sh_addr = 0;
3218 this_hdr->sh_offset = 0;
3219 this_hdr->sh_size = asect->size;
3220 this_hdr->sh_link = 0;
3221 /* PR 17512: file: 0eb809fe, 8b0535ee. */
3222 if (asect->alignment_power >= (sizeof (bfd_vma) * 8) - 1)
3225 /* xgettext:c-format */
3226 (_("%pB: error: alignment power %d of section `%pA' is too big"),
3227 abfd, asect->alignment_power, asect);
3231 this_hdr->sh_addralign = (bfd_vma) 1 << asect->alignment_power;
3232 /* The sh_entsize and sh_info fields may have been set already by
3233 copy_private_section_data. */
3235 this_hdr->bfd_section = asect;
3236 this_hdr->contents = NULL;
3238 /* If the section type is unspecified, we set it based on
3240 if ((asect->flags & SEC_GROUP) != 0)
3241 sh_type = SHT_GROUP;
3243 sh_type = bfd_elf_get_default_section_type (asect->flags);
3245 if (this_hdr->sh_type == SHT_NULL)
3246 this_hdr->sh_type = sh_type;
3247 else if (this_hdr->sh_type == SHT_NOBITS
3248 && sh_type == SHT_PROGBITS
3249 && (asect->flags & SEC_ALLOC) != 0)
3251 /* Warn if we are changing a NOBITS section to PROGBITS, but
3252 allow the link to proceed. This can happen when users link
3253 non-bss input sections to bss output sections, or emit data
3254 to a bss output section via a linker script. */
3256 (_("warning: section `%pA' type changed to PROGBITS"), asect);
3257 this_hdr->sh_type = sh_type;
3260 switch (this_hdr->sh_type)
3271 case SHT_INIT_ARRAY:
3272 case SHT_FINI_ARRAY:
3273 case SHT_PREINIT_ARRAY:
3274 this_hdr->sh_entsize = bed->s->arch_size / 8;
3278 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
3282 this_hdr->sh_entsize = bed->s->sizeof_sym;
3286 this_hdr->sh_entsize = bed->s->sizeof_dyn;
3290 if (get_elf_backend_data (abfd)->may_use_rela_p)
3291 this_hdr->sh_entsize = bed->s->sizeof_rela;
3295 if (get_elf_backend_data (abfd)->may_use_rel_p)
3296 this_hdr->sh_entsize = bed->s->sizeof_rel;
3299 case SHT_GNU_versym:
3300 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
3303 case SHT_GNU_verdef:
3304 this_hdr->sh_entsize = 0;
3305 /* objcopy or strip will copy over sh_info, but may not set
3306 cverdefs. The linker will set cverdefs, but sh_info will be
3308 if (this_hdr->sh_info == 0)
3309 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
3311 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
3312 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
3315 case SHT_GNU_verneed:
3316 this_hdr->sh_entsize = 0;
3317 /* objcopy or strip will copy over sh_info, but may not set
3318 cverrefs. The linker will set cverrefs, but sh_info will be
3320 if (this_hdr->sh_info == 0)
3321 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
3323 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
3324 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
3328 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
3332 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
3336 if ((asect->flags & SEC_ALLOC) != 0)
3337 this_hdr->sh_flags |= SHF_ALLOC;
3338 if ((asect->flags & SEC_READONLY) == 0)
3339 this_hdr->sh_flags |= SHF_WRITE;
3340 if ((asect->flags & SEC_CODE) != 0)
3341 this_hdr->sh_flags |= SHF_EXECINSTR;
3342 if ((asect->flags & SEC_MERGE) != 0)
3344 this_hdr->sh_flags |= SHF_MERGE;
3345 this_hdr->sh_entsize = asect->entsize;
3347 if ((asect->flags & SEC_STRINGS) != 0)
3348 this_hdr->sh_flags |= SHF_STRINGS;
3349 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
3350 this_hdr->sh_flags |= SHF_GROUP;
3351 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
3353 this_hdr->sh_flags |= SHF_TLS;
3354 if (asect->size == 0
3355 && (asect->flags & SEC_HAS_CONTENTS) == 0)
3357 struct bfd_link_order *o = asect->map_tail.link_order;
3359 this_hdr->sh_size = 0;
3362 this_hdr->sh_size = o->offset + o->size;
3363 if (this_hdr->sh_size != 0)
3364 this_hdr->sh_type = SHT_NOBITS;
3368 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
3369 this_hdr->sh_flags |= SHF_EXCLUDE;
3371 /* If the section has relocs, set up a section header for the
3372 SHT_REL[A] section. If two relocation sections are required for
3373 this section, it is up to the processor-specific back-end to
3374 create the other. */
3375 if ((asect->flags & SEC_RELOC) != 0)
3377 /* When doing a relocatable link, create both REL and RELA sections if
3380 /* Do the normal setup if we wouldn't create any sections here. */
3381 && esd->rel.count + esd->rela.count > 0
3382 && (bfd_link_relocatable (arg->link_info)
3383 || arg->link_info->emitrelocations))
3385 if (esd->rel.count && esd->rel.hdr == NULL
3386 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rel, name,
3387 FALSE, delay_st_name_p))
3392 if (esd->rela.count && esd->rela.hdr == NULL
3393 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rela, name,
3394 TRUE, delay_st_name_p))
3400 else if (!_bfd_elf_init_reloc_shdr (abfd,
3402 ? &esd->rela : &esd->rel),
3412 /* Check for processor-specific section types. */
3413 sh_type = this_hdr->sh_type;
3414 if (bed->elf_backend_fake_sections
3415 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
3421 if (sh_type == SHT_NOBITS && asect->size != 0)
3423 /* Don't change the header type from NOBITS if we are being
3424 called for objcopy --only-keep-debug. */
3425 this_hdr->sh_type = sh_type;
3429 /* Fill in the contents of a SHT_GROUP section. Called from
3430 _bfd_elf_compute_section_file_positions for gas, objcopy, and
3431 when ELF targets use the generic linker, ld. Called for ld -r
3432 from bfd_elf_final_link. */
3435 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
3437 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
3438 asection *elt, *first;
3442 /* Ignore linker created group section. See elfNN_ia64_object_p in
3444 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
3448 if (elf_section_data (sec)->this_hdr.sh_info == 0)
3450 unsigned long symindx = 0;
3452 /* elf_group_id will have been set up by objcopy and the
3454 if (elf_group_id (sec) != NULL)
3455 symindx = elf_group_id (sec)->udata.i;
3459 /* If called from the assembler, swap_out_syms will have set up
3460 elf_section_syms. */
3461 BFD_ASSERT (elf_section_syms (abfd) != NULL);
3462 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
3464 elf_section_data (sec)->this_hdr.sh_info = symindx;
3466 else if (elf_section_data (sec)->this_hdr.sh_info == (unsigned int) -2)
3468 /* The ELF backend linker sets sh_info to -2 when the group
3469 signature symbol is global, and thus the index can't be
3470 set until all local symbols are output. */
3472 struct bfd_elf_section_data *sec_data;
3473 unsigned long symndx;
3474 unsigned long extsymoff;
3475 struct elf_link_hash_entry *h;
3477 /* The point of this little dance to the first SHF_GROUP section
3478 then back to the SHT_GROUP section is that this gets us to
3479 the SHT_GROUP in the input object. */
3480 igroup = elf_sec_group (elf_next_in_group (sec));
3481 sec_data = elf_section_data (igroup);
3482 symndx = sec_data->this_hdr.sh_info;
3484 if (!elf_bad_symtab (igroup->owner))
3486 Elf_Internal_Shdr *symtab_hdr;
3488 symtab_hdr = &elf_tdata (igroup->owner)->symtab_hdr;
3489 extsymoff = symtab_hdr->sh_info;
3491 h = elf_sym_hashes (igroup->owner)[symndx - extsymoff];
3492 while (h->root.type == bfd_link_hash_indirect
3493 || h->root.type == bfd_link_hash_warning)
3494 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3496 elf_section_data (sec)->this_hdr.sh_info = h->indx;
3499 /* The contents won't be allocated for "ld -r" or objcopy. */
3501 if (sec->contents == NULL)
3504 sec->contents = (unsigned char *) bfd_alloc (abfd, sec->size);
3506 /* Arrange for the section to be written out. */
3507 elf_section_data (sec)->this_hdr.contents = sec->contents;
3508 if (sec->contents == NULL)
3515 loc = sec->contents + sec->size;
3517 /* Get the pointer to the first section in the group that gas
3518 squirreled away here. objcopy arranges for this to be set to the
3519 start of the input section group. */
3520 first = elt = elf_next_in_group (sec);
3522 /* First element is a flag word. Rest of section is elf section
3523 indices for all the sections of the group. Write them backwards
3524 just to keep the group in the same order as given in .section
3525 directives, not that it matters. */
3532 s = s->output_section;
3534 && !bfd_is_abs_section (s))
3536 struct bfd_elf_section_data *elf_sec = elf_section_data (s);
3537 struct bfd_elf_section_data *input_elf_sec = elf_section_data (elt);
3539 if (elf_sec->rel.hdr != NULL
3541 || (input_elf_sec->rel.hdr != NULL
3542 && input_elf_sec->rel.hdr->sh_flags & SHF_GROUP) != 0))
3544 elf_sec->rel.hdr->sh_flags |= SHF_GROUP;
3546 H_PUT_32 (abfd, elf_sec->rel.idx, loc);
3548 if (elf_sec->rela.hdr != NULL
3550 || (input_elf_sec->rela.hdr != NULL
3551 && input_elf_sec->rela.hdr->sh_flags & SHF_GROUP) != 0))
3553 elf_sec->rela.hdr->sh_flags |= SHF_GROUP;
3555 H_PUT_32 (abfd, elf_sec->rela.idx, loc);
3558 H_PUT_32 (abfd, elf_sec->this_idx, loc);
3560 elt = elf_next_in_group (elt);
3566 BFD_ASSERT (loc == sec->contents);
3568 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
3571 /* Given NAME, the name of a relocation section stripped of its
3572 .rel/.rela prefix, return the section in ABFD to which the
3573 relocations apply. */
3576 _bfd_elf_plt_get_reloc_section (bfd *abfd, const char *name)
3578 /* If a target needs .got.plt section, relocations in rela.plt/rel.plt
3579 section likely apply to .got.plt or .got section. */
3580 if (get_elf_backend_data (abfd)->want_got_plt
3581 && strcmp (name, ".plt") == 0)
3586 sec = bfd_get_section_by_name (abfd, name);
3592 return bfd_get_section_by_name (abfd, name);
3595 /* Return the section to which RELOC_SEC applies. */
3598 elf_get_reloc_section (asection *reloc_sec)
3603 const struct elf_backend_data *bed;
3605 type = elf_section_data (reloc_sec)->this_hdr.sh_type;
3606 if (type != SHT_REL && type != SHT_RELA)
3609 /* We look up the section the relocs apply to by name. */
3610 name = reloc_sec->name;
3611 if (strncmp (name, ".rel", 4) != 0)
3614 if (type == SHT_RELA && *name++ != 'a')
3617 abfd = reloc_sec->owner;
3618 bed = get_elf_backend_data (abfd);
3619 return bed->get_reloc_section (abfd, name);
3622 /* Assign all ELF section numbers. The dummy first section is handled here
3623 too. The link/info pointers for the standard section types are filled
3624 in here too, while we're at it. */
3627 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
3629 struct elf_obj_tdata *t = elf_tdata (abfd);
3631 unsigned int section_number;
3632 Elf_Internal_Shdr **i_shdrp;
3633 struct bfd_elf_section_data *d;
3634 bfd_boolean need_symtab;
3638 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
3640 /* SHT_GROUP sections are in relocatable files only. */
3641 if (link_info == NULL || !link_info->resolve_section_groups)
3643 size_t reloc_count = 0;
3645 /* Put SHT_GROUP sections first. */
3646 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3648 d = elf_section_data (sec);
3650 if (d->this_hdr.sh_type == SHT_GROUP)
3652 if (sec->flags & SEC_LINKER_CREATED)
3654 /* Remove the linker created SHT_GROUP sections. */
3655 bfd_section_list_remove (abfd, sec);
3656 abfd->section_count--;
3659 d->this_idx = section_number++;
3662 /* Count relocations. */
3663 reloc_count += sec->reloc_count;
3666 /* Clear HAS_RELOC if there are no relocations. */
3667 if (reloc_count == 0)
3668 abfd->flags &= ~HAS_RELOC;
3671 for (sec = abfd->sections; sec; sec = sec->next)
3673 d = elf_section_data (sec);
3675 if (d->this_hdr.sh_type != SHT_GROUP)
3676 d->this_idx = section_number++;
3677 if (d->this_hdr.sh_name != (unsigned int) -1)
3678 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
3681 d->rel.idx = section_number++;
3682 if (d->rel.hdr->sh_name != (unsigned int) -1)
3683 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel.hdr->sh_name);
3690 d->rela.idx = section_number++;
3691 if (d->rela.hdr->sh_name != (unsigned int) -1)
3692 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rela.hdr->sh_name);
3698 need_symtab = (bfd_get_symcount (abfd) > 0
3699 || (link_info == NULL
3700 && ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3704 elf_onesymtab (abfd) = section_number++;
3705 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
3706 if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
3708 elf_section_list * entry;
3710 BFD_ASSERT (elf_symtab_shndx_list (abfd) == NULL);
3712 entry = bfd_zalloc (abfd, sizeof * entry);
3713 entry->ndx = section_number++;
3714 elf_symtab_shndx_list (abfd) = entry;
3716 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3717 ".symtab_shndx", FALSE);
3718 if (entry->hdr.sh_name == (unsigned int) -1)
3721 elf_strtab_sec (abfd) = section_number++;
3722 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
3725 elf_shstrtab_sec (abfd) = section_number++;
3726 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
3727 elf_elfheader (abfd)->e_shstrndx = elf_shstrtab_sec (abfd);
3729 if (section_number >= SHN_LORESERVE)
3731 /* xgettext:c-format */
3732 _bfd_error_handler (_("%pB: too many sections: %u"),
3733 abfd, section_number);
3737 elf_numsections (abfd) = section_number;
3738 elf_elfheader (abfd)->e_shnum = section_number;
3740 /* Set up the list of section header pointers, in agreement with the
3742 i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc2 (abfd, section_number,
3743 sizeof (Elf_Internal_Shdr *));
3744 if (i_shdrp == NULL)
3747 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd,
3748 sizeof (Elf_Internal_Shdr));
3749 if (i_shdrp[0] == NULL)
3751 bfd_release (abfd, i_shdrp);
3755 elf_elfsections (abfd) = i_shdrp;
3757 i_shdrp[elf_shstrtab_sec (abfd)] = &t->shstrtab_hdr;
3760 i_shdrp[elf_onesymtab (abfd)] = &t->symtab_hdr;
3761 if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF))
3763 elf_section_list * entry = elf_symtab_shndx_list (abfd);
3764 BFD_ASSERT (entry != NULL);
3765 i_shdrp[entry->ndx] = & entry->hdr;
3766 entry->hdr.sh_link = elf_onesymtab (abfd);
3768 i_shdrp[elf_strtab_sec (abfd)] = &t->strtab_hdr;
3769 t->symtab_hdr.sh_link = elf_strtab_sec (abfd);
3772 for (sec = abfd->sections; sec; sec = sec->next)
3776 d = elf_section_data (sec);
3778 i_shdrp[d->this_idx] = &d->this_hdr;
3779 if (d->rel.idx != 0)
3780 i_shdrp[d->rel.idx] = d->rel.hdr;
3781 if (d->rela.idx != 0)
3782 i_shdrp[d->rela.idx] = d->rela.hdr;
3784 /* Fill in the sh_link and sh_info fields while we're at it. */
3786 /* sh_link of a reloc section is the section index of the symbol
3787 table. sh_info is the section index of the section to which
3788 the relocation entries apply. */
3789 if (d->rel.idx != 0)
3791 d->rel.hdr->sh_link = elf_onesymtab (abfd);
3792 d->rel.hdr->sh_info = d->this_idx;
3793 d->rel.hdr->sh_flags |= SHF_INFO_LINK;
3795 if (d->rela.idx != 0)
3797 d->rela.hdr->sh_link = elf_onesymtab (abfd);
3798 d->rela.hdr->sh_info = d->this_idx;
3799 d->rela.hdr->sh_flags |= SHF_INFO_LINK;
3802 /* We need to set up sh_link for SHF_LINK_ORDER. */
3803 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3805 s = elf_linked_to_section (sec);
3808 /* elf_linked_to_section points to the input section. */
3809 if (link_info != NULL)
3811 /* Check discarded linkonce section. */
3812 if (discarded_section (s))
3816 /* xgettext:c-format */
3817 (_("%pB: sh_link of section `%pA' points to"
3818 " discarded section `%pA' of `%pB'"),
3819 abfd, d->this_hdr.bfd_section,
3821 /* Point to the kept section if it has the same
3822 size as the discarded one. */
3823 kept = _bfd_elf_check_kept_section (s, link_info);
3826 bfd_set_error (bfd_error_bad_value);
3832 s = s->output_section;
3833 BFD_ASSERT (s != NULL);
3837 /* Handle objcopy. */
3838 if (s->output_section == NULL)
3841 /* xgettext:c-format */
3842 (_("%pB: sh_link of section `%pA' points to"
3843 " removed section `%pA' of `%pB'"),
3844 abfd, d->this_hdr.bfd_section, s, s->owner);
3845 bfd_set_error (bfd_error_bad_value);
3848 s = s->output_section;
3850 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3855 The Intel C compiler generates SHT_IA_64_UNWIND with
3856 SHF_LINK_ORDER. But it doesn't set the sh_link or
3857 sh_info fields. Hence we could get the situation
3859 const struct elf_backend_data *bed
3860 = get_elf_backend_data (abfd);
3861 if (bed->link_order_error_handler)
3862 bed->link_order_error_handler
3863 /* xgettext:c-format */
3864 (_("%pB: warning: sh_link not set for section `%pA'"),
3869 switch (d->this_hdr.sh_type)
3873 /* A reloc section which we are treating as a normal BFD
3874 section. sh_link is the section index of the symbol
3875 table. sh_info is the section index of the section to
3876 which the relocation entries apply. We assume that an
3877 allocated reloc section uses the dynamic symbol table.
3878 FIXME: How can we be sure? */
3879 s = bfd_get_section_by_name (abfd, ".dynsym");
3881 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3883 s = elf_get_reloc_section (sec);
3886 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3887 d->this_hdr.sh_flags |= SHF_INFO_LINK;
3892 /* We assume that a section named .stab*str is a stabs
3893 string section. We look for a section with the same name
3894 but without the trailing ``str'', and set its sh_link
3895 field to point to this section. */
3896 if (CONST_STRNEQ (sec->name, ".stab")
3897 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3902 len = strlen (sec->name);
3903 alc = (char *) bfd_malloc (len - 2);
3906 memcpy (alc, sec->name, len - 3);
3907 alc[len - 3] = '\0';
3908 s = bfd_get_section_by_name (abfd, alc);
3912 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3914 /* This is a .stab section. */
3915 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3916 elf_section_data (s)->this_hdr.sh_entsize
3917 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3924 case SHT_GNU_verneed:
3925 case SHT_GNU_verdef:
3926 /* sh_link is the section header index of the string table
3927 used for the dynamic entries, or the symbol table, or the
3929 s = bfd_get_section_by_name (abfd, ".dynstr");
3931 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3934 case SHT_GNU_LIBLIST:
3935 /* sh_link is the section header index of the prelink library
3936 list used for the dynamic entries, or the symbol table, or
3937 the version strings. */
3938 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3939 ? ".dynstr" : ".gnu.libstr");
3941 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3946 case SHT_GNU_versym:
3947 /* sh_link is the section header index of the symbol table
3948 this hash table or version table is for. */
3949 s = bfd_get_section_by_name (abfd, ".dynsym");
3951 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3955 d->this_hdr.sh_link = elf_onesymtab (abfd);
3959 /* Delay setting sh_name to _bfd_elf_write_object_contents so that
3960 _bfd_elf_assign_file_positions_for_non_load can convert DWARF
3961 debug section name from .debug_* to .zdebug_* if needed. */
3967 sym_is_global (bfd *abfd, asymbol *sym)
3969 /* If the backend has a special mapping, use it. */
3970 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3971 if (bed->elf_backend_sym_is_global)
3972 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3974 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_GNU_UNIQUE)) != 0
3975 || bfd_is_und_section (bfd_get_section (sym))
3976 || bfd_is_com_section (bfd_get_section (sym)));
3979 /* Filter global symbols of ABFD to include in the import library. All
3980 SYMCOUNT symbols of ABFD can be examined from their pointers in
3981 SYMS. Pointers of symbols to keep should be stored contiguously at
3982 the beginning of that array.
3984 Returns the number of symbols to keep. */
3987 _bfd_elf_filter_global_symbols (bfd *abfd, struct bfd_link_info *info,
3988 asymbol **syms, long symcount)
3990 long src_count, dst_count = 0;
3992 for (src_count = 0; src_count < symcount; src_count++)
3994 asymbol *sym = syms[src_count];
3995 char *name = (char *) bfd_asymbol_name (sym);
3996 struct bfd_link_hash_entry *h;
3998 if (!sym_is_global (abfd, sym))
4001 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, FALSE);
4004 if (h->type != bfd_link_hash_defined && h->type != bfd_link_hash_defweak)
4006 if (h->linker_def || h->ldscript_def)
4009 syms[dst_count++] = sym;
4012 syms[dst_count] = NULL;
4017 /* Don't output section symbols for sections that are not going to be
4018 output, that are duplicates or there is no BFD section. */
4021 ignore_section_sym (bfd *abfd, asymbol *sym)
4023 elf_symbol_type *type_ptr;
4028 if ((sym->flags & BSF_SECTION_SYM) == 0)
4031 if (sym->section == NULL)
4034 type_ptr = elf_symbol_from (abfd, sym);
4035 return ((type_ptr != NULL
4036 && type_ptr->internal_elf_sym.st_shndx != 0
4037 && bfd_is_abs_section (sym->section))
4038 || !(sym->section->owner == abfd
4039 || (sym->section->output_section != NULL
4040 && sym->section->output_section->owner == abfd
4041 && sym->section->output_offset == 0)
4042 || bfd_is_abs_section (sym->section)));
4045 /* Map symbol from it's internal number to the external number, moving
4046 all local symbols to be at the head of the list. */
4049 elf_map_symbols (bfd *abfd, unsigned int *pnum_locals)
4051 unsigned int symcount = bfd_get_symcount (abfd);
4052 asymbol **syms = bfd_get_outsymbols (abfd);
4053 asymbol **sect_syms;
4054 unsigned int num_locals = 0;
4055 unsigned int num_globals = 0;
4056 unsigned int num_locals2 = 0;
4057 unsigned int num_globals2 = 0;
4058 unsigned int max_index = 0;
4064 fprintf (stderr, "elf_map_symbols\n");
4068 for (asect = abfd->sections; asect; asect = asect->next)
4070 if (max_index < asect->index)
4071 max_index = asect->index;
4075 sect_syms = (asymbol **) bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
4076 if (sect_syms == NULL)
4078 elf_section_syms (abfd) = sect_syms;
4079 elf_num_section_syms (abfd) = max_index;
4081 /* Init sect_syms entries for any section symbols we have already
4082 decided to output. */
4083 for (idx = 0; idx < symcount; idx++)
4085 asymbol *sym = syms[idx];
4087 if ((sym->flags & BSF_SECTION_SYM) != 0
4089 && !ignore_section_sym (abfd, sym)
4090 && !bfd_is_abs_section (sym->section))
4092 asection *sec = sym->section;
4094 if (sec->owner != abfd)
4095 sec = sec->output_section;
4097 sect_syms[sec->index] = syms[idx];
4101 /* Classify all of the symbols. */
4102 for (idx = 0; idx < symcount; idx++)
4104 if (sym_is_global (abfd, syms[idx]))
4106 else if (!ignore_section_sym (abfd, syms[idx]))
4110 /* We will be adding a section symbol for each normal BFD section. Most
4111 sections will already have a section symbol in outsymbols, but
4112 eg. SHT_GROUP sections will not, and we need the section symbol mapped
4113 at least in that case. */
4114 for (asect = abfd->sections; asect; asect = asect->next)
4116 if (sect_syms[asect->index] == NULL)
4118 if (!sym_is_global (abfd, asect->symbol))
4125 /* Now sort the symbols so the local symbols are first. */
4126 new_syms = (asymbol **) bfd_alloc2 (abfd, num_locals + num_globals,
4127 sizeof (asymbol *));
4129 if (new_syms == NULL)
4132 for (idx = 0; idx < symcount; idx++)
4134 asymbol *sym = syms[idx];
4137 if (sym_is_global (abfd, sym))
4138 i = num_locals + num_globals2++;
4139 else if (!ignore_section_sym (abfd, sym))
4144 sym->udata.i = i + 1;
4146 for (asect = abfd->sections; asect; asect = asect->next)
4148 if (sect_syms[asect->index] == NULL)
4150 asymbol *sym = asect->symbol;
4153 sect_syms[asect->index] = sym;
4154 if (!sym_is_global (abfd, sym))
4157 i = num_locals + num_globals2++;
4159 sym->udata.i = i + 1;
4163 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
4165 *pnum_locals = num_locals;
4169 /* Align to the maximum file alignment that could be required for any
4170 ELF data structure. */
4172 static inline file_ptr
4173 align_file_position (file_ptr off, int align)
4175 return (off + align - 1) & ~(align - 1);
4178 /* Assign a file position to a section, optionally aligning to the
4179 required section alignment. */
4182 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
4186 if (align && i_shdrp->sh_addralign > 1)
4187 offset = BFD_ALIGN (offset, i_shdrp->sh_addralign);
4188 i_shdrp->sh_offset = offset;
4189 if (i_shdrp->bfd_section != NULL)
4190 i_shdrp->bfd_section->filepos = offset;
4191 if (i_shdrp->sh_type != SHT_NOBITS)
4192 offset += i_shdrp->sh_size;
4196 /* Compute the file positions we are going to put the sections at, and
4197 otherwise prepare to begin writing out the ELF file. If LINK_INFO
4198 is not NULL, this is being called by the ELF backend linker. */
4201 _bfd_elf_compute_section_file_positions (bfd *abfd,
4202 struct bfd_link_info *link_info)
4204 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4205 struct fake_section_arg fsargs;
4207 struct elf_strtab_hash *strtab = NULL;
4208 Elf_Internal_Shdr *shstrtab_hdr;
4209 bfd_boolean need_symtab;
4211 if (abfd->output_has_begun)
4214 /* Do any elf backend specific processing first. */
4215 if (bed->elf_backend_begin_write_processing)
4216 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
4218 if (! prep_headers (abfd))
4221 /* Post process the headers if necessary. */
4222 (*bed->elf_backend_post_process_headers) (abfd, link_info);
4224 fsargs.failed = FALSE;
4225 fsargs.link_info = link_info;
4226 bfd_map_over_sections (abfd, elf_fake_sections, &fsargs);
4230 if (!assign_section_numbers (abfd, link_info))
4233 /* The backend linker builds symbol table information itself. */
4234 need_symtab = (link_info == NULL
4235 && (bfd_get_symcount (abfd) > 0
4236 || ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
4240 /* Non-zero if doing a relocatable link. */
4241 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
4243 if (! swap_out_syms (abfd, &strtab, relocatable_p))
4248 if (link_info == NULL)
4250 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
4255 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
4256 /* sh_name was set in prep_headers. */
4257 shstrtab_hdr->sh_type = SHT_STRTAB;
4258 shstrtab_hdr->sh_flags = bed->elf_strtab_flags;
4259 shstrtab_hdr->sh_addr = 0;
4260 /* sh_size is set in _bfd_elf_assign_file_positions_for_non_load. */
4261 shstrtab_hdr->sh_entsize = 0;
4262 shstrtab_hdr->sh_link = 0;
4263 shstrtab_hdr->sh_info = 0;
4264 /* sh_offset is set in _bfd_elf_assign_file_positions_for_non_load. */
4265 shstrtab_hdr->sh_addralign = 1;
4267 if (!assign_file_positions_except_relocs (abfd, link_info))
4273 Elf_Internal_Shdr *hdr;
4275 off = elf_next_file_pos (abfd);
4277 hdr = & elf_symtab_hdr (abfd);
4278 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4280 if (elf_symtab_shndx_list (abfd) != NULL)
4282 hdr = & elf_symtab_shndx_list (abfd)->hdr;
4283 if (hdr->sh_size != 0)
4284 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4285 /* FIXME: What about other symtab_shndx sections in the list ? */
4288 hdr = &elf_tdata (abfd)->strtab_hdr;
4289 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4291 elf_next_file_pos (abfd) = off;
4293 /* Now that we know where the .strtab section goes, write it
4295 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
4296 || ! _bfd_elf_strtab_emit (abfd, strtab))
4298 _bfd_elf_strtab_free (strtab);
4301 abfd->output_has_begun = TRUE;
4306 /* Make an initial estimate of the size of the program header. If we
4307 get the number wrong here, we'll redo section placement. */
4309 static bfd_size_type
4310 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
4314 const struct elf_backend_data *bed;
4316 /* Assume we will need exactly two PT_LOAD segments: one for text
4317 and one for data. */
4320 s = bfd_get_section_by_name (abfd, ".interp");
4321 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4323 /* If we have a loadable interpreter section, we need a
4324 PT_INTERP segment. In this case, assume we also need a
4325 PT_PHDR segment, although that may not be true for all
4330 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4332 /* We need a PT_DYNAMIC segment. */
4336 if (info != NULL && info->relro)
4338 /* We need a PT_GNU_RELRO segment. */
4342 if (elf_eh_frame_hdr (abfd))
4344 /* We need a PT_GNU_EH_FRAME segment. */
4348 if (elf_stack_flags (abfd))
4350 /* We need a PT_GNU_STACK segment. */
4354 for (s = abfd->sections; s != NULL; s = s->next)
4356 if ((s->flags & SEC_LOAD) != 0
4357 && CONST_STRNEQ (s->name, ".note"))
4359 /* We need a PT_NOTE segment. */
4361 /* Try to create just one PT_NOTE segment
4362 for all adjacent loadable .note* sections.
4363 gABI requires that within a PT_NOTE segment
4364 (and also inside of each SHT_NOTE section)
4365 each note is padded to a multiple of 4 size,
4366 so we check whether the sections are correctly
4368 if (s->alignment_power == 2)
4369 while (s->next != NULL
4370 && s->next->alignment_power == 2
4371 && (s->next->flags & SEC_LOAD) != 0
4372 && CONST_STRNEQ (s->next->name, ".note"))
4377 for (s = abfd->sections; s != NULL; s = s->next)
4379 if (s->flags & SEC_THREAD_LOCAL)
4381 /* We need a PT_TLS segment. */
4387 bed = get_elf_backend_data (abfd);
4389 if ((abfd->flags & D_PAGED) != 0)
4391 /* Add a PT_GNU_MBIND segment for each mbind section. */
4392 unsigned int page_align_power = bfd_log2 (bed->commonpagesize);
4393 for (s = abfd->sections; s != NULL; s = s->next)
4394 if (elf_section_flags (s) & SHF_GNU_MBIND)
4396 if (elf_section_data (s)->this_hdr.sh_info
4400 /* xgettext:c-format */
4401 (_("%pB: GNU_MBIN section `%pA' has invalid sh_info field: %d"),
4402 abfd, s, elf_section_data (s)->this_hdr.sh_info);
4405 /* Align mbind section to page size. */
4406 if (s->alignment_power < page_align_power)
4407 s->alignment_power = page_align_power;
4412 /* Let the backend count up any program headers it might need. */
4413 if (bed->elf_backend_additional_program_headers)
4417 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
4423 return segs * bed->s->sizeof_phdr;
4426 /* Find the segment that contains the output_section of section. */
4429 _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section)
4431 struct elf_segment_map *m;
4432 Elf_Internal_Phdr *p;
4434 for (m = elf_seg_map (abfd), p = elf_tdata (abfd)->phdr;
4440 for (i = m->count - 1; i >= 0; i--)
4441 if (m->sections[i] == section)
4448 /* Create a mapping from a set of sections to a program segment. */
4450 static struct elf_segment_map *
4451 make_mapping (bfd *abfd,
4452 asection **sections,
4457 struct elf_segment_map *m;
4462 amt = sizeof (struct elf_segment_map);
4463 amt += (to - from - 1) * sizeof (asection *);
4464 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4468 m->p_type = PT_LOAD;
4469 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
4470 m->sections[i - from] = *hdrpp;
4471 m->count = to - from;
4473 if (from == 0 && phdr)
4475 /* Include the headers in the first PT_LOAD segment. */
4476 m->includes_filehdr = 1;
4477 m->includes_phdrs = 1;
4483 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
4486 struct elf_segment_map *
4487 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
4489 struct elf_segment_map *m;
4491 m = (struct elf_segment_map *) bfd_zalloc (abfd,
4492 sizeof (struct elf_segment_map));
4496 m->p_type = PT_DYNAMIC;
4498 m->sections[0] = dynsec;
4503 /* Possibly add or remove segments from the segment map. */
4506 elf_modify_segment_map (bfd *abfd,
4507 struct bfd_link_info *info,
4508 bfd_boolean remove_empty_load)
4510 struct elf_segment_map **m;
4511 const struct elf_backend_data *bed;
4513 /* The placement algorithm assumes that non allocated sections are
4514 not in PT_LOAD segments. We ensure this here by removing such
4515 sections from the segment map. We also remove excluded
4516 sections. Finally, any PT_LOAD segment without sections is
4518 m = &elf_seg_map (abfd);
4521 unsigned int i, new_count;
4523 for (new_count = 0, i = 0; i < (*m)->count; i++)
4525 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
4526 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
4527 || (*m)->p_type != PT_LOAD))
4529 (*m)->sections[new_count] = (*m)->sections[i];
4533 (*m)->count = new_count;
4535 if (remove_empty_load
4536 && (*m)->p_type == PT_LOAD
4538 && !(*m)->includes_phdrs)
4544 bed = get_elf_backend_data (abfd);
4545 if (bed->elf_backend_modify_segment_map != NULL)
4547 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
4554 #define IS_TBSS(s) \
4555 ((s->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) == SEC_THREAD_LOCAL)
4557 /* Set up a mapping from BFD sections to program segments. */
4560 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
4563 struct elf_segment_map *m;
4564 asection **sections = NULL;
4565 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4566 bfd_boolean no_user_phdrs;
4568 no_user_phdrs = elf_seg_map (abfd) == NULL;
4571 info->user_phdrs = !no_user_phdrs;
4573 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
4577 struct elf_segment_map *mfirst;
4578 struct elf_segment_map **pm;
4581 unsigned int phdr_index;
4582 bfd_vma maxpagesize;
4584 bfd_boolean phdr_in_segment = TRUE;
4585 bfd_boolean writable;
4586 bfd_boolean executable;
4588 asection *first_tls = NULL;
4589 asection *first_mbind = NULL;
4590 asection *dynsec, *eh_frame_hdr;
4592 bfd_vma addr_mask, wrap_to = 0;
4593 bfd_boolean linker_created_pt_phdr_segment = FALSE;
4595 /* Select the allocated sections, and sort them. */
4597 sections = (asection **) bfd_malloc2 (bfd_count_sections (abfd),
4598 sizeof (asection *));
4599 if (sections == NULL)
4602 /* Calculate top address, avoiding undefined behaviour of shift
4603 left operator when shift count is equal to size of type
4605 addr_mask = ((bfd_vma) 1 << (bfd_arch_bits_per_address (abfd) - 1)) - 1;
4606 addr_mask = (addr_mask << 1) + 1;
4609 for (s = abfd->sections; s != NULL; s = s->next)
4611 if ((s->flags & SEC_ALLOC) != 0)
4615 /* A wrapping section potentially clashes with header. */
4616 if (((s->lma + s->size) & addr_mask) < (s->lma & addr_mask))
4617 wrap_to = (s->lma + s->size) & addr_mask;
4620 BFD_ASSERT (i <= bfd_count_sections (abfd));
4623 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
4625 /* Build the mapping. */
4630 /* If we have a .interp section, then create a PT_PHDR segment for
4631 the program headers and a PT_INTERP segment for the .interp
4633 s = bfd_get_section_by_name (abfd, ".interp");
4634 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4636 amt = sizeof (struct elf_segment_map);
4637 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4641 m->p_type = PT_PHDR;
4643 m->p_flags_valid = 1;
4644 m->includes_phdrs = 1;
4645 linker_created_pt_phdr_segment = TRUE;
4649 amt = sizeof (struct elf_segment_map);
4650 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4654 m->p_type = PT_INTERP;
4662 /* Look through the sections. We put sections in the same program
4663 segment when the start of the second section can be placed within
4664 a few bytes of the end of the first section. */
4668 maxpagesize = bed->maxpagesize;
4669 /* PR 17512: file: c8455299.
4670 Avoid divide-by-zero errors later on.
4671 FIXME: Should we abort if the maxpagesize is zero ? */
4672 if (maxpagesize == 0)
4676 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
4678 && (dynsec->flags & SEC_LOAD) == 0)
4681 /* Deal with -Ttext or something similar such that the first section
4682 is not adjacent to the program headers. This is an
4683 approximation, since at this point we don't know exactly how many
4684 program headers we will need. */
4687 bfd_size_type phdr_size = elf_program_header_size (abfd);
4689 if (phdr_size == (bfd_size_type) -1)
4690 phdr_size = get_program_header_size (abfd, info);
4691 phdr_size += bed->s->sizeof_ehdr;
4692 if ((abfd->flags & D_PAGED) == 0
4693 || (sections[0]->lma & addr_mask) < phdr_size
4694 || ((sections[0]->lma & addr_mask) % maxpagesize
4695 < phdr_size % maxpagesize)
4696 || (sections[0]->lma & addr_mask & -maxpagesize) < wrap_to)
4698 /* PR 20815: The ELF standard says that a PT_PHDR segment, if
4699 present, must be included as part of the memory image of the
4700 program. Ie it must be part of a PT_LOAD segment as well.
4701 If we have had to create our own PT_PHDR segment, but it is
4702 not going to be covered by the first PT_LOAD segment, then
4703 force the inclusion if we can... */
4704 if ((abfd->flags & D_PAGED) != 0
4705 && linker_created_pt_phdr_segment)
4706 phdr_in_segment = TRUE;
4708 phdr_in_segment = FALSE;
4712 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
4715 bfd_boolean new_segment;
4719 /* See if this section and the last one will fit in the same
4722 if (last_hdr == NULL)
4724 /* If we don't have a segment yet, then we don't need a new
4725 one (we build the last one after this loop). */
4726 new_segment = FALSE;
4728 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
4730 /* If this section has a different relation between the
4731 virtual address and the load address, then we need a new
4735 else if (hdr->lma < last_hdr->lma + last_size
4736 || last_hdr->lma + last_size < last_hdr->lma)
4738 /* If this section has a load address that makes it overlap
4739 the previous section, then we need a new segment. */
4742 else if ((abfd->flags & D_PAGED) != 0
4743 && (((last_hdr->lma + last_size - 1) & -maxpagesize)
4744 == (hdr->lma & -maxpagesize)))
4746 /* If we are demand paged then we can't map two disk
4747 pages onto the same memory page. */
4748 new_segment = FALSE;
4750 /* In the next test we have to be careful when last_hdr->lma is close
4751 to the end of the address space. If the aligned address wraps
4752 around to the start of the address space, then there are no more
4753 pages left in memory and it is OK to assume that the current
4754 section can be included in the current segment. */
4755 else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
4756 + maxpagesize > last_hdr->lma)
4757 && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
4758 + maxpagesize <= hdr->lma))
4760 /* If putting this section in this segment would force us to
4761 skip a page in the segment, then we need a new segment. */
4764 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
4765 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
4767 /* We don't want to put a loaded section after a
4768 nonloaded (ie. bss style) section in the same segment
4769 as that will force the non-loaded section to be loaded.
4770 Consider .tbss sections as loaded for this purpose. */
4773 else if ((abfd->flags & D_PAGED) == 0)
4775 /* If the file is not demand paged, which means that we
4776 don't require the sections to be correctly aligned in the
4777 file, then there is no other reason for a new segment. */
4778 new_segment = FALSE;
4780 else if (info != NULL
4781 && info->separate_code
4782 && executable != ((hdr->flags & SEC_CODE) != 0))
4787 && (hdr->flags & SEC_READONLY) == 0)
4789 /* We don't want to put a writable section in a read only
4795 /* Otherwise, we can use the same segment. */
4796 new_segment = FALSE;
4799 /* Allow interested parties a chance to override our decision. */
4800 if (last_hdr != NULL
4802 && info->callbacks->override_segment_assignment != NULL)
4804 = info->callbacks->override_segment_assignment (info, abfd, hdr,
4810 if ((hdr->flags & SEC_READONLY) == 0)
4812 if ((hdr->flags & SEC_CODE) != 0)
4815 /* .tbss sections effectively have zero size. */
4816 last_size = !IS_TBSS (hdr) ? hdr->size : 0;
4820 /* We need a new program segment. We must create a new program
4821 header holding all the sections from phdr_index until hdr. */
4823 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4830 if ((hdr->flags & SEC_READONLY) == 0)
4835 if ((hdr->flags & SEC_CODE) == 0)
4841 /* .tbss sections effectively have zero size. */
4842 last_size = !IS_TBSS (hdr) ? hdr->size : 0;
4844 phdr_in_segment = FALSE;
4847 /* Create a final PT_LOAD program segment, but not if it's just
4849 if (last_hdr != NULL
4850 && (i - phdr_index != 1
4851 || !IS_TBSS (last_hdr)))
4853 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4861 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
4864 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
4871 /* For each batch of consecutive loadable .note sections,
4872 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
4873 because if we link together nonloadable .note sections and
4874 loadable .note sections, we will generate two .note sections
4875 in the output file. FIXME: Using names for section types is
4877 for (s = abfd->sections; s != NULL; s = s->next)
4879 if ((s->flags & SEC_LOAD) != 0
4880 && CONST_STRNEQ (s->name, ".note"))
4885 amt = sizeof (struct elf_segment_map);
4886 if (s->alignment_power == 2)
4887 for (s2 = s; s2->next != NULL; s2 = s2->next)
4889 if (s2->next->alignment_power == 2
4890 && (s2->next->flags & SEC_LOAD) != 0
4891 && CONST_STRNEQ (s2->next->name, ".note")
4892 && align_power (s2->lma + s2->size, 2)
4898 amt += (count - 1) * sizeof (asection *);
4899 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4903 m->p_type = PT_NOTE;
4907 m->sections[m->count - count--] = s;
4908 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4911 m->sections[m->count - 1] = s;
4912 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4916 if (s->flags & SEC_THREAD_LOCAL)
4922 if (first_mbind == NULL
4923 && (elf_section_flags (s) & SHF_GNU_MBIND) != 0)
4927 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
4930 amt = sizeof (struct elf_segment_map);
4931 amt += (tls_count - 1) * sizeof (asection *);
4932 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4937 m->count = tls_count;
4938 /* Mandated PF_R. */
4940 m->p_flags_valid = 1;
4942 for (i = 0; i < (unsigned int) tls_count; ++i)
4944 if ((s->flags & SEC_THREAD_LOCAL) == 0)
4947 (_("%pB: TLS sections are not adjacent:"), abfd);
4950 while (i < (unsigned int) tls_count)
4952 if ((s->flags & SEC_THREAD_LOCAL) != 0)
4954 _bfd_error_handler (_(" TLS: %pA"), s);
4958 _bfd_error_handler (_(" non-TLS: %pA"), s);
4961 bfd_set_error (bfd_error_bad_value);
4972 if (first_mbind && (abfd->flags & D_PAGED) != 0)
4973 for (s = first_mbind; s != NULL; s = s->next)
4974 if ((elf_section_flags (s) & SHF_GNU_MBIND) != 0
4975 && (elf_section_data (s)->this_hdr.sh_info
4976 <= PT_GNU_MBIND_NUM))
4978 /* Mandated PF_R. */
4979 unsigned long p_flags = PF_R;
4980 if ((s->flags & SEC_READONLY) == 0)
4982 if ((s->flags & SEC_CODE) != 0)
4985 amt = sizeof (struct elf_segment_map) + sizeof (asection *);
4986 m = bfd_zalloc (abfd, amt);
4990 m->p_type = (PT_GNU_MBIND_LO
4991 + elf_section_data (s)->this_hdr.sh_info);
4993 m->p_flags_valid = 1;
4995 m->p_flags = p_flags;
5001 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
5003 eh_frame_hdr = elf_eh_frame_hdr (abfd);
5004 if (eh_frame_hdr != NULL
5005 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
5007 amt = sizeof (struct elf_segment_map);
5008 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
5012 m->p_type = PT_GNU_EH_FRAME;
5014 m->sections[0] = eh_frame_hdr->output_section;
5020 if (elf_stack_flags (abfd))
5022 amt = sizeof (struct elf_segment_map);
5023 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
5027 m->p_type = PT_GNU_STACK;
5028 m->p_flags = elf_stack_flags (abfd);
5029 m->p_align = bed->stack_align;
5030 m->p_flags_valid = 1;
5031 m->p_align_valid = m->p_align != 0;
5032 if (info->stacksize > 0)
5034 m->p_size = info->stacksize;
5035 m->p_size_valid = 1;
5042 if (info != NULL && info->relro)
5044 for (m = mfirst; m != NULL; m = m->next)
5046 if (m->p_type == PT_LOAD
5048 && m->sections[0]->vma >= info->relro_start
5049 && m->sections[0]->vma < info->relro_end)
5052 while (--i != (unsigned) -1)
5053 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS))
5054 == (SEC_LOAD | SEC_HAS_CONTENTS))
5057 if (i != (unsigned) -1)
5062 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
5065 amt = sizeof (struct elf_segment_map);
5066 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
5070 m->p_type = PT_GNU_RELRO;
5077 elf_seg_map (abfd) = mfirst;
5080 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
5083 for (count = 0, m = elf_seg_map (abfd); m != NULL; m = m->next)
5085 elf_program_header_size (abfd) = count * bed->s->sizeof_phdr;
5090 if (sections != NULL)
5095 /* Sort sections by address. */
5098 elf_sort_sections (const void *arg1, const void *arg2)
5100 const asection *sec1 = *(const asection **) arg1;
5101 const asection *sec2 = *(const asection **) arg2;
5102 bfd_size_type size1, size2;
5104 /* Sort by LMA first, since this is the address used to
5105 place the section into a segment. */
5106 if (sec1->lma < sec2->lma)
5108 else if (sec1->lma > sec2->lma)
5111 /* Then sort by VMA. Normally the LMA and the VMA will be
5112 the same, and this will do nothing. */
5113 if (sec1->vma < sec2->vma)
5115 else if (sec1->vma > sec2->vma)
5118 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
5120 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
5126 /* If the indicies are the same, do not return 0
5127 here, but continue to try the next comparison. */
5128 if (sec1->target_index - sec2->target_index != 0)
5129 return sec1->target_index - sec2->target_index;
5134 else if (TOEND (sec2))
5139 /* Sort by size, to put zero sized sections
5140 before others at the same address. */
5142 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
5143 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
5150 return sec1->target_index - sec2->target_index;
5153 /* Ian Lance Taylor writes:
5155 We shouldn't be using % with a negative signed number. That's just
5156 not good. We have to make sure either that the number is not
5157 negative, or that the number has an unsigned type. When the types
5158 are all the same size they wind up as unsigned. When file_ptr is a
5159 larger signed type, the arithmetic winds up as signed long long,
5162 What we're trying to say here is something like ``increase OFF by
5163 the least amount that will cause it to be equal to the VMA modulo
5165 /* In other words, something like:
5167 vma_offset = m->sections[0]->vma % bed->maxpagesize;
5168 off_offset = off % bed->maxpagesize;
5169 if (vma_offset < off_offset)
5170 adjustment = vma_offset + bed->maxpagesize - off_offset;
5172 adjustment = vma_offset - off_offset;
5174 which can be collapsed into the expression below. */
5177 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
5179 /* PR binutils/16199: Handle an alignment of zero. */
5180 if (maxpagesize == 0)
5182 return ((vma - off) % maxpagesize);
5186 print_segment_map (const struct elf_segment_map *m)
5189 const char *pt = get_segment_type (m->p_type);
5194 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
5195 sprintf (buf, "LOPROC+%7.7x",
5196 (unsigned int) (m->p_type - PT_LOPROC));
5197 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
5198 sprintf (buf, "LOOS+%7.7x",
5199 (unsigned int) (m->p_type - PT_LOOS));
5201 snprintf (buf, sizeof (buf), "%8.8x",
5202 (unsigned int) m->p_type);
5206 fprintf (stderr, "%s:", pt);
5207 for (j = 0; j < m->count; j++)
5208 fprintf (stderr, " %s", m->sections [j]->name);
5214 write_zeros (bfd *abfd, file_ptr pos, bfd_size_type len)
5219 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
5221 buf = bfd_zmalloc (len);
5224 ret = bfd_bwrite (buf, len, abfd) == len;
5229 /* Assign file positions to the sections based on the mapping from
5230 sections to segments. This function also sets up some fields in
5234 assign_file_positions_for_load_sections (bfd *abfd,
5235 struct bfd_link_info *link_info)
5237 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5238 struct elf_segment_map *m;
5239 Elf_Internal_Phdr *phdrs;
5240 Elf_Internal_Phdr *p;
5242 bfd_size_type maxpagesize;
5243 unsigned int pt_load_count = 0;
5246 bfd_vma header_pad = 0;
5248 if (link_info == NULL
5249 && !_bfd_elf_map_sections_to_segments (abfd, link_info))
5253 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
5257 header_pad = m->header_size;
5262 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
5263 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
5267 /* PR binutils/12467. */
5268 elf_elfheader (abfd)->e_phoff = 0;
5269 elf_elfheader (abfd)->e_phentsize = 0;
5272 elf_elfheader (abfd)->e_phnum = alloc;
5274 if (elf_program_header_size (abfd) == (bfd_size_type) -1)
5275 elf_program_header_size (abfd) = alloc * bed->s->sizeof_phdr;
5277 BFD_ASSERT (elf_program_header_size (abfd)
5278 >= alloc * bed->s->sizeof_phdr);
5282 elf_next_file_pos (abfd) = bed->s->sizeof_ehdr;
5286 /* We're writing the size in elf_program_header_size (abfd),
5287 see assign_file_positions_except_relocs, so make sure we have
5288 that amount allocated, with trailing space cleared.
5289 The variable alloc contains the computed need, while
5290 elf_program_header_size (abfd) contains the size used for the
5292 See ld/emultempl/elf-generic.em:gld${EMULATION_NAME}_map_segments
5293 where the layout is forced to according to a larger size in the
5294 last iterations for the testcase ld-elf/header. */
5295 BFD_ASSERT (elf_program_header_size (abfd) % bed->s->sizeof_phdr
5297 phdrs = (Elf_Internal_Phdr *)
5299 (elf_program_header_size (abfd) / bed->s->sizeof_phdr),
5300 sizeof (Elf_Internal_Phdr));
5301 elf_tdata (abfd)->phdr = phdrs;
5306 if ((abfd->flags & D_PAGED) != 0)
5307 maxpagesize = bed->maxpagesize;
5309 off = bed->s->sizeof_ehdr;
5310 off += alloc * bed->s->sizeof_phdr;
5311 if (header_pad < (bfd_vma) off)
5317 for (m = elf_seg_map (abfd), p = phdrs, j = 0;
5319 m = m->next, p++, j++)
5323 bfd_boolean no_contents;
5325 /* If elf_segment_map is not from map_sections_to_segments, the
5326 sections may not be correctly ordered. NOTE: sorting should
5327 not be done to the PT_NOTE section of a corefile, which may
5328 contain several pseudo-sections artificially created by bfd.
5329 Sorting these pseudo-sections breaks things badly. */
5331 && !(elf_elfheader (abfd)->e_type == ET_CORE
5332 && m->p_type == PT_NOTE))
5333 qsort (m->sections, (size_t) m->count, sizeof (asection *),
5336 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
5337 number of sections with contents contributing to both p_filesz
5338 and p_memsz, followed by a number of sections with no contents
5339 that just contribute to p_memsz. In this loop, OFF tracks next
5340 available file offset for PT_LOAD and PT_NOTE segments. */
5341 p->p_type = m->p_type;
5342 p->p_flags = m->p_flags;
5347 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
5349 if (m->p_paddr_valid)
5350 p->p_paddr = m->p_paddr;
5351 else if (m->count == 0)
5354 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
5356 if (p->p_type == PT_LOAD
5357 && (abfd->flags & D_PAGED) != 0)
5359 /* p_align in demand paged PT_LOAD segments effectively stores
5360 the maximum page size. When copying an executable with
5361 objcopy, we set m->p_align from the input file. Use this
5362 value for maxpagesize rather than bed->maxpagesize, which
5363 may be different. Note that we use maxpagesize for PT_TLS
5364 segment alignment later in this function, so we are relying
5365 on at least one PT_LOAD segment appearing before a PT_TLS
5367 if (m->p_align_valid)
5368 maxpagesize = m->p_align;
5370 p->p_align = maxpagesize;
5373 else if (m->p_align_valid)
5374 p->p_align = m->p_align;
5375 else if (m->count == 0)
5376 p->p_align = 1 << bed->s->log_file_align;
5380 no_contents = FALSE;
5382 if (p->p_type == PT_LOAD
5385 bfd_size_type align;
5386 unsigned int align_power = 0;
5388 if (m->p_align_valid)
5392 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
5394 unsigned int secalign;
5396 secalign = bfd_get_section_alignment (abfd, *secpp);
5397 if (secalign > align_power)
5398 align_power = secalign;
5400 align = (bfd_size_type) 1 << align_power;
5401 if (align < maxpagesize)
5402 align = maxpagesize;
5405 for (i = 0; i < m->count; i++)
5406 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
5407 /* If we aren't making room for this section, then
5408 it must be SHT_NOBITS regardless of what we've
5409 set via struct bfd_elf_special_section. */
5410 elf_section_type (m->sections[i]) = SHT_NOBITS;
5412 /* Find out whether this segment contains any loadable
5415 for (i = 0; i < m->count; i++)
5416 if (elf_section_type (m->sections[i]) != SHT_NOBITS)
5418 no_contents = FALSE;
5422 off_adjust = vma_page_aligned_bias (p->p_vaddr, off, align);
5424 /* Broken hardware and/or kernel require that files do not
5425 map the same page with different permissions on some hppa
5427 if (pt_load_count > 1
5428 && bed->no_page_alias
5429 && (off & (maxpagesize - 1)) != 0
5430 && (off & -maxpagesize) == ((off + off_adjust) & -maxpagesize))
5431 off_adjust += maxpagesize;
5435 /* We shouldn't need to align the segment on disk since
5436 the segment doesn't need file space, but the gABI
5437 arguably requires the alignment and glibc ld.so
5438 checks it. So to comply with the alignment
5439 requirement but not waste file space, we adjust
5440 p_offset for just this segment. (OFF_ADJUST is
5441 subtracted from OFF later.) This may put p_offset
5442 past the end of file, but that shouldn't matter. */
5447 /* Make sure the .dynamic section is the first section in the
5448 PT_DYNAMIC segment. */
5449 else if (p->p_type == PT_DYNAMIC
5451 && strcmp (m->sections[0]->name, ".dynamic") != 0)
5454 (_("%pB: The first section in the PT_DYNAMIC segment"
5455 " is not the .dynamic section"),
5457 bfd_set_error (bfd_error_bad_value);
5460 /* Set the note section type to SHT_NOTE. */
5461 else if (p->p_type == PT_NOTE)
5462 for (i = 0; i < m->count; i++)
5463 elf_section_type (m->sections[i]) = SHT_NOTE;
5469 if (m->includes_filehdr)
5471 if (!m->p_flags_valid)
5473 p->p_filesz = bed->s->sizeof_ehdr;
5474 p->p_memsz = bed->s->sizeof_ehdr;
5477 if (p->p_vaddr < (bfd_vma) off
5478 || (!m->p_paddr_valid
5479 && p->p_paddr < (bfd_vma) off))
5482 (_("%pB: not enough room for program headers,"
5483 " try linking with -N"),
5485 bfd_set_error (bfd_error_bad_value);
5490 if (!m->p_paddr_valid)
5495 if (m->includes_phdrs)
5497 if (!m->p_flags_valid)
5500 if (!m->includes_filehdr)
5502 p->p_offset = bed->s->sizeof_ehdr;
5506 p->p_vaddr -= off - p->p_offset;
5507 if (!m->p_paddr_valid)
5508 p->p_paddr -= off - p->p_offset;
5512 p->p_filesz += alloc * bed->s->sizeof_phdr;
5513 p->p_memsz += alloc * bed->s->sizeof_phdr;
5516 p->p_filesz += header_pad;
5517 p->p_memsz += header_pad;
5521 if (p->p_type == PT_LOAD
5522 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
5524 if (!m->includes_filehdr && !m->includes_phdrs)
5530 adjust = off - (p->p_offset + p->p_filesz);
5532 p->p_filesz += adjust;
5533 p->p_memsz += adjust;
5537 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
5538 maps. Set filepos for sections in PT_LOAD segments, and in
5539 core files, for sections in PT_NOTE segments.
5540 assign_file_positions_for_non_load_sections will set filepos
5541 for other sections and update p_filesz for other segments. */
5542 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
5545 bfd_size_type align;
5546 Elf_Internal_Shdr *this_hdr;
5549 this_hdr = &elf_section_data (sec)->this_hdr;
5550 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
5552 if ((p->p_type == PT_LOAD
5553 || p->p_type == PT_TLS)
5554 && (this_hdr->sh_type != SHT_NOBITS
5555 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
5556 && ((this_hdr->sh_flags & SHF_TLS) == 0
5557 || p->p_type == PT_TLS))))
5559 bfd_vma p_start = p->p_paddr;
5560 bfd_vma p_end = p_start + p->p_memsz;
5561 bfd_vma s_start = sec->lma;
5562 bfd_vma adjust = s_start - p_end;
5566 || p_end < p_start))
5569 /* xgettext:c-format */
5570 (_("%pB: section %pA lma %#" PRIx64 " adjusted to %#" PRIx64),
5571 abfd, sec, (uint64_t) s_start, (uint64_t) p_end);
5575 p->p_memsz += adjust;
5577 if (this_hdr->sh_type != SHT_NOBITS)
5579 if (p->p_filesz + adjust < p->p_memsz)
5581 /* We have a PROGBITS section following NOBITS ones.
5582 Allocate file space for the NOBITS section(s) and
5584 adjust = p->p_memsz - p->p_filesz;
5585 if (!write_zeros (abfd, off, adjust))
5589 p->p_filesz += adjust;
5593 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
5595 /* The section at i == 0 is the one that actually contains
5599 this_hdr->sh_offset = sec->filepos = off;
5600 off += this_hdr->sh_size;
5601 p->p_filesz = this_hdr->sh_size;
5607 /* The rest are fake sections that shouldn't be written. */
5616 if (p->p_type == PT_LOAD)
5618 this_hdr->sh_offset = sec->filepos = off;
5619 if (this_hdr->sh_type != SHT_NOBITS)
5620 off += this_hdr->sh_size;
5622 else if (this_hdr->sh_type == SHT_NOBITS
5623 && (this_hdr->sh_flags & SHF_TLS) != 0
5624 && this_hdr->sh_offset == 0)
5626 /* This is a .tbss section that didn't get a PT_LOAD.
5627 (See _bfd_elf_map_sections_to_segments "Create a
5628 final PT_LOAD".) Set sh_offset to the value it
5629 would have if we had created a zero p_filesz and
5630 p_memsz PT_LOAD header for the section. This
5631 also makes the PT_TLS header have the same
5633 bfd_vma adjust = vma_page_aligned_bias (this_hdr->sh_addr,
5635 this_hdr->sh_offset = sec->filepos = off + adjust;
5638 if (this_hdr->sh_type != SHT_NOBITS)
5640 p->p_filesz += this_hdr->sh_size;
5641 /* A load section without SHF_ALLOC is something like
5642 a note section in a PT_NOTE segment. These take
5643 file space but are not loaded into memory. */
5644 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
5645 p->p_memsz += this_hdr->sh_size;
5647 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
5649 if (p->p_type == PT_TLS)
5650 p->p_memsz += this_hdr->sh_size;
5652 /* .tbss is special. It doesn't contribute to p_memsz of
5654 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
5655 p->p_memsz += this_hdr->sh_size;
5658 if (align > p->p_align
5659 && !m->p_align_valid
5660 && (p->p_type != PT_LOAD
5661 || (abfd->flags & D_PAGED) == 0))
5665 if (!m->p_flags_valid)
5668 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
5670 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
5677 /* Check that all sections are in a PT_LOAD segment.
5678 Don't check funky gdb generated core files. */
5679 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
5681 bfd_boolean check_vma = TRUE;
5683 for (i = 1; i < m->count; i++)
5684 if (m->sections[i]->vma == m->sections[i - 1]->vma
5685 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i])
5686 ->this_hdr), p) != 0
5687 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i - 1])
5688 ->this_hdr), p) != 0)
5690 /* Looks like we have overlays packed into the segment. */
5695 for (i = 0; i < m->count; i++)
5697 Elf_Internal_Shdr *this_hdr;
5700 sec = m->sections[i];
5701 this_hdr = &(elf_section_data(sec)->this_hdr);
5702 if (!ELF_SECTION_IN_SEGMENT_1 (this_hdr, p, check_vma, 0)
5703 && !ELF_TBSS_SPECIAL (this_hdr, p))
5706 /* xgettext:c-format */
5707 (_("%pB: section `%pA' can't be allocated in segment %d"),
5709 print_segment_map (m);
5715 elf_next_file_pos (abfd) = off;
5719 /* Assign file positions for the other sections. */
5722 assign_file_positions_for_non_load_sections (bfd *abfd,
5723 struct bfd_link_info *link_info)
5725 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5726 Elf_Internal_Shdr **i_shdrpp;
5727 Elf_Internal_Shdr **hdrpp, **end_hdrpp;
5728 Elf_Internal_Phdr *phdrs;
5729 Elf_Internal_Phdr *p;
5730 struct elf_segment_map *m;
5731 struct elf_segment_map *hdrs_segment;
5732 bfd_vma filehdr_vaddr, filehdr_paddr;
5733 bfd_vma phdrs_vaddr, phdrs_paddr;
5737 i_shdrpp = elf_elfsections (abfd);
5738 end_hdrpp = i_shdrpp + elf_numsections (abfd);
5739 off = elf_next_file_pos (abfd);
5740 for (hdrpp = i_shdrpp + 1; hdrpp < end_hdrpp; hdrpp++)
5742 Elf_Internal_Shdr *hdr;
5745 if (hdr->bfd_section != NULL
5746 && (hdr->bfd_section->filepos != 0
5747 || (hdr->sh_type == SHT_NOBITS
5748 && hdr->contents == NULL)))
5749 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
5750 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
5752 if (hdr->sh_size != 0)
5754 /* xgettext:c-format */
5755 (_("%pB: warning: allocated section `%s' not in segment"),
5757 (hdr->bfd_section == NULL
5759 : hdr->bfd_section->name));
5760 /* We don't need to page align empty sections. */
5761 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
5762 off += vma_page_aligned_bias (hdr->sh_addr, off,
5765 off += vma_page_aligned_bias (hdr->sh_addr, off,
5767 off = _bfd_elf_assign_file_position_for_section (hdr, off,
5770 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
5771 && hdr->bfd_section == NULL)
5772 || (hdr->bfd_section != NULL
5773 && (hdr->bfd_section->flags & SEC_ELF_COMPRESS))
5774 /* Compress DWARF debug sections. */
5775 || hdr == i_shdrpp[elf_onesymtab (abfd)]
5776 || (elf_symtab_shndx_list (abfd) != NULL
5777 && hdr == i_shdrpp[elf_symtab_shndx_list (abfd)->ndx])
5778 || hdr == i_shdrpp[elf_strtab_sec (abfd)]
5779 || hdr == i_shdrpp[elf_shstrtab_sec (abfd)])
5780 hdr->sh_offset = -1;
5782 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
5785 /* Now that we have set the section file positions, we can set up
5786 the file positions for the non PT_LOAD segments. */
5790 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
5792 hdrs_segment = NULL;
5793 phdrs = elf_tdata (abfd)->phdr;
5794 for (m = elf_seg_map (abfd), p = phdrs; m != NULL; m = m->next, p++)
5797 if (p->p_type != PT_LOAD)
5800 if (m->includes_filehdr)
5802 filehdr_vaddr = p->p_vaddr;
5803 filehdr_paddr = p->p_paddr;
5805 if (m->includes_phdrs)
5807 phdrs_vaddr = p->p_vaddr;
5808 phdrs_paddr = p->p_paddr;
5809 if (m->includes_filehdr)
5812 phdrs_vaddr += bed->s->sizeof_ehdr;
5813 phdrs_paddr += bed->s->sizeof_ehdr;
5818 if (hdrs_segment != NULL && link_info != NULL)
5820 /* There is a segment that contains both the file headers and the
5821 program headers, so provide a symbol __ehdr_start pointing there.
5822 A program can use this to examine itself robustly. */
5824 struct elf_link_hash_entry *hash
5825 = elf_link_hash_lookup (elf_hash_table (link_info), "__ehdr_start",
5826 FALSE, FALSE, TRUE);
5827 /* If the symbol was referenced and not defined, define it. */
5829 && (hash->root.type == bfd_link_hash_new
5830 || hash->root.type == bfd_link_hash_undefined
5831 || hash->root.type == bfd_link_hash_undefweak
5832 || hash->root.type == bfd_link_hash_common))
5835 if (hdrs_segment->count != 0)
5836 /* The segment contains sections, so use the first one. */
5837 s = hdrs_segment->sections[0];
5839 /* Use the first (i.e. lowest-addressed) section in any segment. */
5840 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
5849 hash->root.u.def.value = filehdr_vaddr - s->vma;
5850 hash->root.u.def.section = s;
5854 hash->root.u.def.value = filehdr_vaddr;
5855 hash->root.u.def.section = bfd_abs_section_ptr;
5858 hash->root.type = bfd_link_hash_defined;
5859 hash->def_regular = 1;
5864 for (m = elf_seg_map (abfd), p = phdrs; m != NULL; m = m->next, p++)
5866 if (p->p_type == PT_GNU_RELRO)
5871 if (link_info != NULL)
5873 /* During linking the range of the RELRO segment is passed
5874 in link_info. Note that there may be padding between
5875 relro_start and the first RELRO section. */
5876 start = link_info->relro_start;
5877 end = link_info->relro_end;
5879 else if (m->count != 0)
5881 if (!m->p_size_valid)
5883 start = m->sections[0]->vma;
5884 end = start + m->p_size;
5895 struct elf_segment_map *lm;
5896 const Elf_Internal_Phdr *lp;
5899 /* Find a LOAD segment containing a section in the RELRO
5901 for (lm = elf_seg_map (abfd), lp = phdrs;
5903 lm = lm->next, lp++)
5905 if (lp->p_type == PT_LOAD
5907 && (lm->sections[lm->count - 1]->vma
5908 + (!IS_TBSS (lm->sections[lm->count - 1])
5909 ? lm->sections[lm->count - 1]->size
5911 && lm->sections[0]->vma < end)
5917 /* Find the section starting the RELRO segment. */
5918 for (i = 0; i < lm->count; i++)
5920 asection *s = lm->sections[i];
5929 p->p_vaddr = lm->sections[i]->vma;
5930 p->p_paddr = lm->sections[i]->lma;
5931 p->p_offset = lm->sections[i]->filepos;
5932 p->p_memsz = end - p->p_vaddr;
5933 p->p_filesz = p->p_memsz;
5935 /* The RELRO segment typically ends a few bytes
5936 into .got.plt but other layouts are possible.
5937 In cases where the end does not match any
5938 loaded section (for instance is in file
5939 padding), trim p_filesz back to correspond to
5940 the end of loaded section contents. */
5941 if (p->p_filesz > lp->p_vaddr + lp->p_filesz - p->p_vaddr)
5942 p->p_filesz = lp->p_vaddr + lp->p_filesz - p->p_vaddr;
5944 /* Preserve the alignment and flags if they are
5945 valid. The gold linker generates RW/4 for
5946 the PT_GNU_RELRO section. It is better for
5947 objcopy/strip to honor these attributes
5948 otherwise gdb will choke when using separate
5950 if (!m->p_align_valid)
5952 if (!m->p_flags_valid)
5958 if (link_info != NULL)
5961 memset (p, 0, sizeof *p);
5963 else if (p->p_type == PT_GNU_STACK)
5965 if (m->p_size_valid)
5966 p->p_memsz = m->p_size;
5968 else if (m->count != 0)
5972 if (p->p_type != PT_LOAD
5973 && (p->p_type != PT_NOTE
5974 || bfd_get_format (abfd) != bfd_core))
5976 /* A user specified segment layout may include a PHDR
5977 segment that overlaps with a LOAD segment... */
5978 if (p->p_type == PT_PHDR)
5984 if (m->includes_filehdr || m->includes_phdrs)
5986 /* PR 17512: file: 2195325e. */
5988 (_("%pB: error: non-load segment %d includes file header "
5989 "and/or program header"),
5990 abfd, (int) (p - phdrs));
5995 p->p_offset = m->sections[0]->filepos;
5996 for (i = m->count; i-- != 0;)
5998 asection *sect = m->sections[i];
5999 Elf_Internal_Shdr *hdr = &elf_section_data (sect)->this_hdr;
6000 if (hdr->sh_type != SHT_NOBITS)
6002 p->p_filesz = (sect->filepos - m->sections[0]->filepos
6009 else if (m->includes_filehdr)
6011 p->p_vaddr = filehdr_vaddr;
6012 if (! m->p_paddr_valid)
6013 p->p_paddr = filehdr_paddr;
6015 else if (m->includes_phdrs)
6017 p->p_vaddr = phdrs_vaddr;
6018 if (! m->p_paddr_valid)
6019 p->p_paddr = phdrs_paddr;
6023 elf_next_file_pos (abfd) = off;
6028 static elf_section_list *
6029 find_section_in_list (unsigned int i, elf_section_list * list)
6031 for (;list != NULL; list = list->next)
6037 /* Work out the file positions of all the sections. This is called by
6038 _bfd_elf_compute_section_file_positions. All the section sizes and
6039 VMAs must be known before this is called.
6041 Reloc sections come in two flavours: Those processed specially as
6042 "side-channel" data attached to a section to which they apply, and
6043 those that bfd doesn't process as relocations. The latter sort are
6044 stored in a normal bfd section by bfd_section_from_shdr. We don't
6045 consider the former sort here, unless they form part of the loadable
6046 image. Reloc sections not assigned here will be handled later by
6047 assign_file_positions_for_relocs.
6049 We also don't set the positions of the .symtab and .strtab here. */
6052 assign_file_positions_except_relocs (bfd *abfd,
6053 struct bfd_link_info *link_info)
6055 struct elf_obj_tdata *tdata = elf_tdata (abfd);
6056 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
6057 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6059 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
6060 && bfd_get_format (abfd) != bfd_core)
6062 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
6063 unsigned int num_sec = elf_numsections (abfd);
6064 Elf_Internal_Shdr **hdrpp;
6068 /* Start after the ELF header. */
6069 off = i_ehdrp->e_ehsize;
6071 /* We are not creating an executable, which means that we are
6072 not creating a program header, and that the actual order of
6073 the sections in the file is unimportant. */
6074 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
6076 Elf_Internal_Shdr *hdr;
6079 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
6080 && hdr->bfd_section == NULL)
6081 || (hdr->bfd_section != NULL
6082 && (hdr->bfd_section->flags & SEC_ELF_COMPRESS))
6083 /* Compress DWARF debug sections. */
6084 || i == elf_onesymtab (abfd)
6085 || (elf_symtab_shndx_list (abfd) != NULL
6086 && hdr == i_shdrpp[elf_symtab_shndx_list (abfd)->ndx])
6087 || i == elf_strtab_sec (abfd)
6088 || i == elf_shstrtab_sec (abfd))
6090 hdr->sh_offset = -1;
6093 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
6096 elf_next_file_pos (abfd) = off;
6102 /* Assign file positions for the loaded sections based on the
6103 assignment of sections to segments. */
6104 if (!assign_file_positions_for_load_sections (abfd, link_info))
6107 /* And for non-load sections. */
6108 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
6111 if (bed->elf_backend_modify_program_headers != NULL)
6113 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
6117 /* Set e_type in ELF header to ET_EXEC for -pie -Ttext-segment=. */
6118 if (link_info != NULL && bfd_link_pie (link_info))
6120 unsigned int num_segments = elf_elfheader (abfd)->e_phnum;
6121 Elf_Internal_Phdr *segment = elf_tdata (abfd)->phdr;
6122 Elf_Internal_Phdr *end_segment = &segment[num_segments];
6124 /* Find the lowest p_vaddr in PT_LOAD segments. */
6125 bfd_vma p_vaddr = (bfd_vma) -1;
6126 for (; segment < end_segment; segment++)
6127 if (segment->p_type == PT_LOAD && p_vaddr > segment->p_vaddr)
6128 p_vaddr = segment->p_vaddr;
6130 /* Set e_type to ET_EXEC if the lowest p_vaddr in PT_LOAD
6131 segments is non-zero. */
6133 i_ehdrp->e_type = ET_EXEC;
6136 /* Write out the program headers. */
6137 alloc = elf_elfheader (abfd)->e_phnum;
6141 /* PR ld/20815 - Check that the program header segment, if present, will
6142 be loaded into memory. FIXME: The check below is not sufficient as
6143 really all PT_LOAD segments should be checked before issuing an error
6144 message. Plus the PHDR segment does not have to be the first segment
6145 in the program header table. But this version of the check should
6146 catch all real world use cases.
6148 FIXME: We used to have code here to sort the PT_LOAD segments into
6149 ascending order, as per the ELF spec. But this breaks some programs,
6150 including the Linux kernel. But really either the spec should be
6151 changed or the programs updated. */
6153 && tdata->phdr[0].p_type == PT_PHDR
6154 && (bed->elf_backend_allow_non_load_phdr == NULL
6155 || !bed->elf_backend_allow_non_load_phdr (abfd, tdata->phdr,
6157 && tdata->phdr[1].p_type == PT_LOAD
6158 && (tdata->phdr[1].p_vaddr > tdata->phdr[0].p_vaddr
6159 || (tdata->phdr[1].p_vaddr + tdata->phdr[1].p_memsz
6160 < tdata->phdr[0].p_vaddr + tdata->phdr[0].p_memsz)))
6162 /* The fix for this error is usually to edit the linker script being
6163 used and set up the program headers manually. Either that or
6164 leave room for the headers at the start of the SECTIONS. */
6165 _bfd_error_handler (_("%pB: error: PHDR segment not covered"
6166 " by LOAD segment"),
6171 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
6172 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
6180 prep_headers (bfd *abfd)
6182 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form. */
6183 struct elf_strtab_hash *shstrtab;
6184 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6186 i_ehdrp = elf_elfheader (abfd);
6188 shstrtab = _bfd_elf_strtab_init ();
6189 if (shstrtab == NULL)
6192 elf_shstrtab (abfd) = shstrtab;
6194 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
6195 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
6196 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
6197 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
6199 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
6200 i_ehdrp->e_ident[EI_DATA] =
6201 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
6202 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
6204 if ((abfd->flags & DYNAMIC) != 0)
6205 i_ehdrp->e_type = ET_DYN;
6206 else if ((abfd->flags & EXEC_P) != 0)
6207 i_ehdrp->e_type = ET_EXEC;
6208 else if (bfd_get_format (abfd) == bfd_core)
6209 i_ehdrp->e_type = ET_CORE;
6211 i_ehdrp->e_type = ET_REL;
6213 switch (bfd_get_arch (abfd))
6215 case bfd_arch_unknown:
6216 i_ehdrp->e_machine = EM_NONE;
6219 /* There used to be a long list of cases here, each one setting
6220 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
6221 in the corresponding bfd definition. To avoid duplication,
6222 the switch was removed. Machines that need special handling
6223 can generally do it in elf_backend_final_write_processing(),
6224 unless they need the information earlier than the final write.
6225 Such need can generally be supplied by replacing the tests for
6226 e_machine with the conditions used to determine it. */
6228 i_ehdrp->e_machine = bed->elf_machine_code;
6231 i_ehdrp->e_version = bed->s->ev_current;
6232 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
6234 /* No program header, for now. */
6235 i_ehdrp->e_phoff = 0;
6236 i_ehdrp->e_phentsize = 0;
6237 i_ehdrp->e_phnum = 0;
6239 /* Each bfd section is section header entry. */
6240 i_ehdrp->e_entry = bfd_get_start_address (abfd);
6241 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
6243 /* If we're building an executable, we'll need a program header table. */
6244 if (abfd->flags & EXEC_P)
6245 /* It all happens later. */
6249 i_ehdrp->e_phentsize = 0;
6250 i_ehdrp->e_phoff = 0;
6253 elf_tdata (abfd)->symtab_hdr.sh_name =
6254 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
6255 elf_tdata (abfd)->strtab_hdr.sh_name =
6256 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
6257 elf_tdata (abfd)->shstrtab_hdr.sh_name =
6258 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
6259 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
6260 || elf_tdata (abfd)->strtab_hdr.sh_name == (unsigned int) -1
6261 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
6267 /* Assign file positions for all the reloc sections which are not part
6268 of the loadable file image, and the file position of section headers. */
6271 _bfd_elf_assign_file_positions_for_non_load (bfd *abfd)
6274 Elf_Internal_Shdr **shdrpp, **end_shdrpp;
6275 Elf_Internal_Shdr *shdrp;
6276 Elf_Internal_Ehdr *i_ehdrp;
6277 const struct elf_backend_data *bed;
6279 off = elf_next_file_pos (abfd);
6281 shdrpp = elf_elfsections (abfd);
6282 end_shdrpp = shdrpp + elf_numsections (abfd);
6283 for (shdrpp++; shdrpp < end_shdrpp; shdrpp++)
6286 if (shdrp->sh_offset == -1)
6288 asection *sec = shdrp->bfd_section;
6289 bfd_boolean is_rel = (shdrp->sh_type == SHT_REL
6290 || shdrp->sh_type == SHT_RELA);
6292 || (sec != NULL && (sec->flags & SEC_ELF_COMPRESS)))
6296 const char *name = sec->name;
6297 struct bfd_elf_section_data *d;
6299 /* Compress DWARF debug sections. */
6300 if (!bfd_compress_section (abfd, sec,
6304 if (sec->compress_status == COMPRESS_SECTION_DONE
6305 && (abfd->flags & BFD_COMPRESS_GABI) == 0)
6307 /* If section is compressed with zlib-gnu, convert
6308 section name from .debug_* to .zdebug_*. */
6310 = convert_debug_to_zdebug (abfd, name);
6311 if (new_name == NULL)
6315 /* Add section name to section name section. */
6316 if (shdrp->sh_name != (unsigned int) -1)
6319 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
6321 d = elf_section_data (sec);
6323 /* Add reloc section name to section name section. */
6325 && !_bfd_elf_set_reloc_sh_name (abfd,
6330 && !_bfd_elf_set_reloc_sh_name (abfd,
6335 /* Update section size and contents. */
6336 shdrp->sh_size = sec->size;
6337 shdrp->contents = sec->contents;
6338 shdrp->bfd_section->contents = NULL;
6340 off = _bfd_elf_assign_file_position_for_section (shdrp,
6347 /* Place section name section after DWARF debug sections have been
6349 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
6350 shdrp = &elf_tdata (abfd)->shstrtab_hdr;
6351 shdrp->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
6352 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
6354 /* Place the section headers. */
6355 i_ehdrp = elf_elfheader (abfd);
6356 bed = get_elf_backend_data (abfd);
6357 off = align_file_position (off, 1 << bed->s->log_file_align);
6358 i_ehdrp->e_shoff = off;
6359 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
6360 elf_next_file_pos (abfd) = off;
6366 _bfd_elf_write_object_contents (bfd *abfd)
6368 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6369 Elf_Internal_Shdr **i_shdrp;
6371 unsigned int count, num_sec;
6372 struct elf_obj_tdata *t;
6374 if (! abfd->output_has_begun
6375 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6378 i_shdrp = elf_elfsections (abfd);
6381 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
6385 if (!_bfd_elf_assign_file_positions_for_non_load (abfd))
6388 /* After writing the headers, we need to write the sections too... */
6389 num_sec = elf_numsections (abfd);
6390 for (count = 1; count < num_sec; count++)
6392 i_shdrp[count]->sh_name
6393 = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
6394 i_shdrp[count]->sh_name);
6395 if (bed->elf_backend_section_processing)
6396 if (!(*bed->elf_backend_section_processing) (abfd, i_shdrp[count]))
6398 if (i_shdrp[count]->contents)
6400 bfd_size_type amt = i_shdrp[count]->sh_size;
6402 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
6403 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
6408 /* Write out the section header names. */
6409 t = elf_tdata (abfd);
6410 if (elf_shstrtab (abfd) != NULL
6411 && (bfd_seek (abfd, t->shstrtab_hdr.sh_offset, SEEK_SET) != 0
6412 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
6415 if (bed->elf_backend_final_write_processing)
6416 (*bed->elf_backend_final_write_processing) (abfd, elf_linker (abfd));
6418 if (!bed->s->write_shdrs_and_ehdr (abfd))
6421 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
6422 if (t->o->build_id.after_write_object_contents != NULL)
6423 return (*t->o->build_id.after_write_object_contents) (abfd);
6429 _bfd_elf_write_corefile_contents (bfd *abfd)
6431 /* Hopefully this can be done just like an object file. */
6432 return _bfd_elf_write_object_contents (abfd);
6435 /* Given a section, search the header to find them. */
6438 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
6440 const struct elf_backend_data *bed;
6441 unsigned int sec_index;
6443 if (elf_section_data (asect) != NULL
6444 && elf_section_data (asect)->this_idx != 0)
6445 return elf_section_data (asect)->this_idx;
6447 if (bfd_is_abs_section (asect))
6448 sec_index = SHN_ABS;
6449 else if (bfd_is_com_section (asect))
6450 sec_index = SHN_COMMON;
6451 else if (bfd_is_und_section (asect))
6452 sec_index = SHN_UNDEF;
6454 sec_index = SHN_BAD;
6456 bed = get_elf_backend_data (abfd);
6457 if (bed->elf_backend_section_from_bfd_section)
6459 int retval = sec_index;
6461 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
6465 if (sec_index == SHN_BAD)
6466 bfd_set_error (bfd_error_nonrepresentable_section);
6471 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
6475 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
6477 asymbol *asym_ptr = *asym_ptr_ptr;
6479 flagword flags = asym_ptr->flags;
6481 /* When gas creates relocations against local labels, it creates its
6482 own symbol for the section, but does put the symbol into the
6483 symbol chain, so udata is 0. When the linker is generating
6484 relocatable output, this section symbol may be for one of the
6485 input sections rather than the output section. */
6486 if (asym_ptr->udata.i == 0
6487 && (flags & BSF_SECTION_SYM)
6488 && asym_ptr->section)
6493 sec = asym_ptr->section;
6494 if (sec->owner != abfd && sec->output_section != NULL)
6495 sec = sec->output_section;
6496 if (sec->owner == abfd
6497 && (indx = sec->index) < elf_num_section_syms (abfd)
6498 && elf_section_syms (abfd)[indx] != NULL)
6499 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
6502 idx = asym_ptr->udata.i;
6506 /* This case can occur when using --strip-symbol on a symbol
6507 which is used in a relocation entry. */
6509 /* xgettext:c-format */
6510 (_("%pB: symbol `%s' required but not present"),
6511 abfd, bfd_asymbol_name (asym_ptr));
6512 bfd_set_error (bfd_error_no_symbols);
6519 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8x\n",
6520 (long) asym_ptr, asym_ptr->name, idx, flags);
6528 /* Rewrite program header information. */
6531 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
6533 Elf_Internal_Ehdr *iehdr;
6534 struct elf_segment_map *map;
6535 struct elf_segment_map *map_first;
6536 struct elf_segment_map **pointer_to_map;
6537 Elf_Internal_Phdr *segment;
6540 unsigned int num_segments;
6541 bfd_boolean phdr_included = FALSE;
6542 bfd_boolean p_paddr_valid;
6543 bfd_vma maxpagesize;
6544 struct elf_segment_map *phdr_adjust_seg = NULL;
6545 unsigned int phdr_adjust_num = 0;
6546 const struct elf_backend_data *bed;
6548 bed = get_elf_backend_data (ibfd);
6549 iehdr = elf_elfheader (ibfd);
6552 pointer_to_map = &map_first;
6554 num_segments = elf_elfheader (ibfd)->e_phnum;
6555 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
6557 /* Returns the end address of the segment + 1. */
6558 #define SEGMENT_END(segment, start) \
6559 (start + (segment->p_memsz > segment->p_filesz \
6560 ? segment->p_memsz : segment->p_filesz))
6562 #define SECTION_SIZE(section, segment) \
6563 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
6564 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
6565 ? section->size : 0)
6567 /* Returns TRUE if the given section is contained within
6568 the given segment. VMA addresses are compared. */
6569 #define IS_CONTAINED_BY_VMA(section, segment) \
6570 (section->vma >= segment->p_vaddr \
6571 && (section->vma + SECTION_SIZE (section, segment) \
6572 <= (SEGMENT_END (segment, segment->p_vaddr))))
6574 /* Returns TRUE if the given section is contained within
6575 the given segment. LMA addresses are compared. */
6576 #define IS_CONTAINED_BY_LMA(section, segment, base) \
6577 (section->lma >= base \
6578 && (section->lma + SECTION_SIZE (section, segment) \
6579 <= SEGMENT_END (segment, base)))
6581 /* Handle PT_NOTE segment. */
6582 #define IS_NOTE(p, s) \
6583 (p->p_type == PT_NOTE \
6584 && elf_section_type (s) == SHT_NOTE \
6585 && (bfd_vma) s->filepos >= p->p_offset \
6586 && ((bfd_vma) s->filepos + s->size \
6587 <= p->p_offset + p->p_filesz))
6589 /* Special case: corefile "NOTE" section containing regs, prpsinfo
6591 #define IS_COREFILE_NOTE(p, s) \
6593 && bfd_get_format (ibfd) == bfd_core \
6597 /* The complicated case when p_vaddr is 0 is to handle the Solaris
6598 linker, which generates a PT_INTERP section with p_vaddr and
6599 p_memsz set to 0. */
6600 #define IS_SOLARIS_PT_INTERP(p, s) \
6602 && p->p_paddr == 0 \
6603 && p->p_memsz == 0 \
6604 && p->p_filesz > 0 \
6605 && (s->flags & SEC_HAS_CONTENTS) != 0 \
6607 && (bfd_vma) s->filepos >= p->p_offset \
6608 && ((bfd_vma) s->filepos + s->size \
6609 <= p->p_offset + p->p_filesz))
6611 /* Decide if the given section should be included in the given segment.
6612 A section will be included if:
6613 1. It is within the address space of the segment -- we use the LMA
6614 if that is set for the segment and the VMA otherwise,
6615 2. It is an allocated section or a NOTE section in a PT_NOTE
6617 3. There is an output section associated with it,
6618 4. The section has not already been allocated to a previous segment.
6619 5. PT_GNU_STACK segments do not include any sections.
6620 6. PT_TLS segment includes only SHF_TLS sections.
6621 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
6622 8. PT_DYNAMIC should not contain empty sections at the beginning
6623 (with the possible exception of .dynamic). */
6624 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
6625 ((((segment->p_paddr \
6626 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
6627 : IS_CONTAINED_BY_VMA (section, segment)) \
6628 && (section->flags & SEC_ALLOC) != 0) \
6629 || IS_NOTE (segment, section)) \
6630 && segment->p_type != PT_GNU_STACK \
6631 && (segment->p_type != PT_TLS \
6632 || (section->flags & SEC_THREAD_LOCAL)) \
6633 && (segment->p_type == PT_LOAD \
6634 || segment->p_type == PT_TLS \
6635 || (section->flags & SEC_THREAD_LOCAL) == 0) \
6636 && (segment->p_type != PT_DYNAMIC \
6637 || SECTION_SIZE (section, segment) > 0 \
6638 || (segment->p_paddr \
6639 ? segment->p_paddr != section->lma \
6640 : segment->p_vaddr != section->vma) \
6641 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
6643 && !section->segment_mark)
6645 /* If the output section of a section in the input segment is NULL,
6646 it is removed from the corresponding output segment. */
6647 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
6648 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
6649 && section->output_section != NULL)
6651 /* Returns TRUE iff seg1 starts after the end of seg2. */
6652 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
6653 (seg1->field >= SEGMENT_END (seg2, seg2->field))
6655 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
6656 their VMA address ranges and their LMA address ranges overlap.
6657 It is possible to have overlapping VMA ranges without overlapping LMA
6658 ranges. RedBoot images for example can have both .data and .bss mapped
6659 to the same VMA range, but with the .data section mapped to a different
6661 #define SEGMENT_OVERLAPS(seg1, seg2) \
6662 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
6663 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
6664 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
6665 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
6667 /* Initialise the segment mark field. */
6668 for (section = ibfd->sections; section != NULL; section = section->next)
6669 section->segment_mark = FALSE;
6671 /* The Solaris linker creates program headers in which all the
6672 p_paddr fields are zero. When we try to objcopy or strip such a
6673 file, we get confused. Check for this case, and if we find it
6674 don't set the p_paddr_valid fields. */
6675 p_paddr_valid = FALSE;
6676 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6679 if (segment->p_paddr != 0)
6681 p_paddr_valid = TRUE;
6685 /* Scan through the segments specified in the program header
6686 of the input BFD. For this first scan we look for overlaps
6687 in the loadable segments. These can be created by weird
6688 parameters to objcopy. Also, fix some solaris weirdness. */
6689 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6694 Elf_Internal_Phdr *segment2;
6696 if (segment->p_type == PT_INTERP)
6697 for (section = ibfd->sections; section; section = section->next)
6698 if (IS_SOLARIS_PT_INTERP (segment, section))
6700 /* Mininal change so that the normal section to segment
6701 assignment code will work. */
6702 segment->p_vaddr = section->vma;
6706 if (segment->p_type != PT_LOAD)
6708 /* Remove PT_GNU_RELRO segment. */
6709 if (segment->p_type == PT_GNU_RELRO)
6710 segment->p_type = PT_NULL;
6714 /* Determine if this segment overlaps any previous segments. */
6715 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++)
6717 bfd_signed_vma extra_length;
6719 if (segment2->p_type != PT_LOAD
6720 || !SEGMENT_OVERLAPS (segment, segment2))
6723 /* Merge the two segments together. */
6724 if (segment2->p_vaddr < segment->p_vaddr)
6726 /* Extend SEGMENT2 to include SEGMENT and then delete
6728 extra_length = (SEGMENT_END (segment, segment->p_vaddr)
6729 - SEGMENT_END (segment2, segment2->p_vaddr));
6731 if (extra_length > 0)
6733 segment2->p_memsz += extra_length;
6734 segment2->p_filesz += extra_length;
6737 segment->p_type = PT_NULL;
6739 /* Since we have deleted P we must restart the outer loop. */
6741 segment = elf_tdata (ibfd)->phdr;
6746 /* Extend SEGMENT to include SEGMENT2 and then delete
6748 extra_length = (SEGMENT_END (segment2, segment2->p_vaddr)
6749 - SEGMENT_END (segment, segment->p_vaddr));
6751 if (extra_length > 0)
6753 segment->p_memsz += extra_length;
6754 segment->p_filesz += extra_length;
6757 segment2->p_type = PT_NULL;
6762 /* The second scan attempts to assign sections to segments. */
6763 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6767 unsigned int section_count;
6768 asection **sections;
6769 asection *output_section;
6771 bfd_vma matching_lma;
6772 bfd_vma suggested_lma;
6775 asection *first_section;
6776 bfd_boolean first_matching_lma;
6777 bfd_boolean first_suggested_lma;
6779 if (segment->p_type == PT_NULL)
6782 first_section = NULL;
6783 /* Compute how many sections might be placed into this segment. */
6784 for (section = ibfd->sections, section_count = 0;
6786 section = section->next)
6788 /* Find the first section in the input segment, which may be
6789 removed from the corresponding output segment. */
6790 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
6792 if (first_section == NULL)
6793 first_section = section;
6794 if (section->output_section != NULL)
6799 /* Allocate a segment map big enough to contain
6800 all of the sections we have selected. */
6801 amt = sizeof (struct elf_segment_map);
6802 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
6803 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
6807 /* Initialise the fields of the segment map. Default to
6808 using the physical address of the segment in the input BFD. */
6810 map->p_type = segment->p_type;
6811 map->p_flags = segment->p_flags;
6812 map->p_flags_valid = 1;
6814 /* If the first section in the input segment is removed, there is
6815 no need to preserve segment physical address in the corresponding
6817 if (!first_section || first_section->output_section != NULL)
6819 map->p_paddr = segment->p_paddr;
6820 map->p_paddr_valid = p_paddr_valid;
6823 /* Determine if this segment contains the ELF file header
6824 and if it contains the program headers themselves. */
6825 map->includes_filehdr = (segment->p_offset == 0
6826 && segment->p_filesz >= iehdr->e_ehsize);
6827 map->includes_phdrs = 0;
6829 if (!phdr_included || segment->p_type != PT_LOAD)
6831 map->includes_phdrs =
6832 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
6833 && (segment->p_offset + segment->p_filesz
6834 >= ((bfd_vma) iehdr->e_phoff
6835 + iehdr->e_phnum * iehdr->e_phentsize)));
6837 if (segment->p_type == PT_LOAD && map->includes_phdrs)
6838 phdr_included = TRUE;
6841 if (section_count == 0)
6843 /* Special segments, such as the PT_PHDR segment, may contain
6844 no sections, but ordinary, loadable segments should contain
6845 something. They are allowed by the ELF spec however, so only
6846 a warning is produced.
6847 There is however the valid use case of embedded systems which
6848 have segments with p_filesz of 0 and a p_memsz > 0 to initialize
6849 flash memory with zeros. No warning is shown for that case. */
6850 if (segment->p_type == PT_LOAD
6851 && (segment->p_filesz > 0 || segment->p_memsz == 0))
6852 /* xgettext:c-format */
6854 (_("%pB: warning: empty loadable segment detected"
6855 " at vaddr=%#" PRIx64 ", is this intentional?"),
6856 ibfd, (uint64_t) segment->p_vaddr);
6859 *pointer_to_map = map;
6860 pointer_to_map = &map->next;
6865 /* Now scan the sections in the input BFD again and attempt
6866 to add their corresponding output sections to the segment map.
6867 The problem here is how to handle an output section which has
6868 been moved (ie had its LMA changed). There are four possibilities:
6870 1. None of the sections have been moved.
6871 In this case we can continue to use the segment LMA from the
6874 2. All of the sections have been moved by the same amount.
6875 In this case we can change the segment's LMA to match the LMA
6876 of the first section.
6878 3. Some of the sections have been moved, others have not.
6879 In this case those sections which have not been moved can be
6880 placed in the current segment which will have to have its size,
6881 and possibly its LMA changed, and a new segment or segments will
6882 have to be created to contain the other sections.
6884 4. The sections have been moved, but not by the same amount.
6885 In this case we can change the segment's LMA to match the LMA
6886 of the first section and we will have to create a new segment
6887 or segments to contain the other sections.
6889 In order to save time, we allocate an array to hold the section
6890 pointers that we are interested in. As these sections get assigned
6891 to a segment, they are removed from this array. */
6893 sections = (asection **) bfd_malloc2 (section_count, sizeof (asection *));
6894 if (sections == NULL)
6897 /* Step One: Scan for segment vs section LMA conflicts.
6898 Also add the sections to the section array allocated above.
6899 Also add the sections to the current segment. In the common
6900 case, where the sections have not been moved, this means that
6901 we have completely filled the segment, and there is nothing
6906 first_matching_lma = TRUE;
6907 first_suggested_lma = TRUE;
6909 for (section = first_section, j = 0;
6911 section = section->next)
6913 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
6915 output_section = section->output_section;
6917 sections[j++] = section;
6919 /* The Solaris native linker always sets p_paddr to 0.
6920 We try to catch that case here, and set it to the
6921 correct value. Note - some backends require that
6922 p_paddr be left as zero. */
6924 && segment->p_vaddr != 0
6925 && !bed->want_p_paddr_set_to_zero
6927 && output_section->lma != 0
6928 && output_section->vma == (segment->p_vaddr
6929 + (map->includes_filehdr
6932 + (map->includes_phdrs
6934 * iehdr->e_phentsize)
6936 map->p_paddr = segment->p_vaddr;
6938 /* Match up the physical address of the segment with the
6939 LMA address of the output section. */
6940 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
6941 || IS_COREFILE_NOTE (segment, section)
6942 || (bed->want_p_paddr_set_to_zero
6943 && IS_CONTAINED_BY_VMA (output_section, segment)))
6945 if (first_matching_lma || output_section->lma < matching_lma)
6947 matching_lma = output_section->lma;
6948 first_matching_lma = FALSE;
6951 /* We assume that if the section fits within the segment
6952 then it does not overlap any other section within that
6954 map->sections[isec++] = output_section;
6956 else if (first_suggested_lma)
6958 suggested_lma = output_section->lma;
6959 first_suggested_lma = FALSE;
6962 if (j == section_count)
6967 BFD_ASSERT (j == section_count);
6969 /* Step Two: Adjust the physical address of the current segment,
6971 if (isec == section_count)
6973 /* All of the sections fitted within the segment as currently
6974 specified. This is the default case. Add the segment to
6975 the list of built segments and carry on to process the next
6976 program header in the input BFD. */
6977 map->count = section_count;
6978 *pointer_to_map = map;
6979 pointer_to_map = &map->next;
6982 && !bed->want_p_paddr_set_to_zero
6983 && matching_lma != map->p_paddr
6984 && !map->includes_filehdr
6985 && !map->includes_phdrs)
6986 /* There is some padding before the first section in the
6987 segment. So, we must account for that in the output
6989 map->p_vaddr_offset = matching_lma - map->p_paddr;
6996 if (!first_matching_lma)
6998 /* At least one section fits inside the current segment.
6999 Keep it, but modify its physical address to match the
7000 LMA of the first section that fitted. */
7001 map->p_paddr = matching_lma;
7005 /* None of the sections fitted inside the current segment.
7006 Change the current segment's physical address to match
7007 the LMA of the first section. */
7008 map->p_paddr = suggested_lma;
7011 /* Offset the segment physical address from the lma
7012 to allow for space taken up by elf headers. */
7013 if (map->includes_filehdr)
7015 if (map->p_paddr >= iehdr->e_ehsize)
7016 map->p_paddr -= iehdr->e_ehsize;
7019 map->includes_filehdr = FALSE;
7020 map->includes_phdrs = FALSE;
7024 if (map->includes_phdrs)
7026 if (map->p_paddr >= iehdr->e_phnum * iehdr->e_phentsize)
7028 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
7030 /* iehdr->e_phnum is just an estimate of the number
7031 of program headers that we will need. Make a note
7032 here of the number we used and the segment we chose
7033 to hold these headers, so that we can adjust the
7034 offset when we know the correct value. */
7035 phdr_adjust_num = iehdr->e_phnum;
7036 phdr_adjust_seg = map;
7039 map->includes_phdrs = FALSE;
7043 /* Step Three: Loop over the sections again, this time assigning
7044 those that fit to the current segment and removing them from the
7045 sections array; but making sure not to leave large gaps. Once all
7046 possible sections have been assigned to the current segment it is
7047 added to the list of built segments and if sections still remain
7048 to be assigned, a new segment is constructed before repeating
7055 first_suggested_lma = TRUE;
7057 /* Fill the current segment with sections that fit. */
7058 for (j = 0; j < section_count; j++)
7060 section = sections[j];
7062 if (section == NULL)
7065 output_section = section->output_section;
7067 BFD_ASSERT (output_section != NULL);
7069 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
7070 || IS_COREFILE_NOTE (segment, section))
7072 if (map->count == 0)
7074 /* If the first section in a segment does not start at
7075 the beginning of the segment, then something is
7077 if (output_section->lma
7079 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
7080 + (map->includes_phdrs
7081 ? iehdr->e_phnum * iehdr->e_phentsize
7089 prev_sec = map->sections[map->count - 1];
7091 /* If the gap between the end of the previous section
7092 and the start of this section is more than
7093 maxpagesize then we need to start a new segment. */
7094 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
7096 < BFD_ALIGN (output_section->lma, maxpagesize))
7097 || (prev_sec->lma + prev_sec->size
7098 > output_section->lma))
7100 if (first_suggested_lma)
7102 suggested_lma = output_section->lma;
7103 first_suggested_lma = FALSE;
7110 map->sections[map->count++] = output_section;
7113 section->segment_mark = TRUE;
7115 else if (first_suggested_lma)
7117 suggested_lma = output_section->lma;
7118 first_suggested_lma = FALSE;
7122 BFD_ASSERT (map->count > 0);
7124 /* Add the current segment to the list of built segments. */
7125 *pointer_to_map = map;
7126 pointer_to_map = &map->next;
7128 if (isec < section_count)
7130 /* We still have not allocated all of the sections to
7131 segments. Create a new segment here, initialise it
7132 and carry on looping. */
7133 amt = sizeof (struct elf_segment_map);
7134 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
7135 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
7142 /* Initialise the fields of the segment map. Set the physical
7143 physical address to the LMA of the first section that has
7144 not yet been assigned. */
7146 map->p_type = segment->p_type;
7147 map->p_flags = segment->p_flags;
7148 map->p_flags_valid = 1;
7149 map->p_paddr = suggested_lma;
7150 map->p_paddr_valid = p_paddr_valid;
7151 map->includes_filehdr = 0;
7152 map->includes_phdrs = 0;
7155 while (isec < section_count);
7160 elf_seg_map (obfd) = map_first;
7162 /* If we had to estimate the number of program headers that were
7163 going to be needed, then check our estimate now and adjust
7164 the offset if necessary. */
7165 if (phdr_adjust_seg != NULL)
7169 for (count = 0, map = map_first; map != NULL; map = map->next)
7172 if (count > phdr_adjust_num)
7173 phdr_adjust_seg->p_paddr
7174 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
7179 #undef IS_CONTAINED_BY_VMA
7180 #undef IS_CONTAINED_BY_LMA
7182 #undef IS_COREFILE_NOTE
7183 #undef IS_SOLARIS_PT_INTERP
7184 #undef IS_SECTION_IN_INPUT_SEGMENT
7185 #undef INCLUDE_SECTION_IN_SEGMENT
7186 #undef SEGMENT_AFTER_SEGMENT
7187 #undef SEGMENT_OVERLAPS
7191 /* Copy ELF program header information. */
7194 copy_elf_program_header (bfd *ibfd, bfd *obfd)
7196 Elf_Internal_Ehdr *iehdr;
7197 struct elf_segment_map *map;
7198 struct elf_segment_map *map_first;
7199 struct elf_segment_map **pointer_to_map;
7200 Elf_Internal_Phdr *segment;
7202 unsigned int num_segments;
7203 bfd_boolean phdr_included = FALSE;
7204 bfd_boolean p_paddr_valid;
7206 iehdr = elf_elfheader (ibfd);
7209 pointer_to_map = &map_first;
7211 /* If all the segment p_paddr fields are zero, don't set
7212 map->p_paddr_valid. */
7213 p_paddr_valid = FALSE;
7214 num_segments = elf_elfheader (ibfd)->e_phnum;
7215 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7218 if (segment->p_paddr != 0)
7220 p_paddr_valid = TRUE;
7224 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7229 unsigned int section_count;
7231 Elf_Internal_Shdr *this_hdr;
7232 asection *first_section = NULL;
7233 asection *lowest_section;
7235 /* Compute how many sections are in this segment. */
7236 for (section = ibfd->sections, section_count = 0;
7238 section = section->next)
7240 this_hdr = &(elf_section_data(section)->this_hdr);
7241 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7243 if (first_section == NULL)
7244 first_section = section;
7249 /* Allocate a segment map big enough to contain
7250 all of the sections we have selected. */
7251 amt = sizeof (struct elf_segment_map);
7252 if (section_count != 0)
7253 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
7254 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
7258 /* Initialize the fields of the output segment map with the
7261 map->p_type = segment->p_type;
7262 map->p_flags = segment->p_flags;
7263 map->p_flags_valid = 1;
7264 map->p_paddr = segment->p_paddr;
7265 map->p_paddr_valid = p_paddr_valid;
7266 map->p_align = segment->p_align;
7267 map->p_align_valid = 1;
7268 map->p_vaddr_offset = 0;
7270 if (map->p_type == PT_GNU_RELRO
7271 || map->p_type == PT_GNU_STACK)
7273 /* The PT_GNU_RELRO segment may contain the first a few
7274 bytes in the .got.plt section even if the whole .got.plt
7275 section isn't in the PT_GNU_RELRO segment. We won't
7276 change the size of the PT_GNU_RELRO segment.
7277 Similarly, PT_GNU_STACK size is significant on uclinux
7279 map->p_size = segment->p_memsz;
7280 map->p_size_valid = 1;
7283 /* Determine if this segment contains the ELF file header
7284 and if it contains the program headers themselves. */
7285 map->includes_filehdr = (segment->p_offset == 0
7286 && segment->p_filesz >= iehdr->e_ehsize);
7288 map->includes_phdrs = 0;
7289 if (! phdr_included || segment->p_type != PT_LOAD)
7291 map->includes_phdrs =
7292 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
7293 && (segment->p_offset + segment->p_filesz
7294 >= ((bfd_vma) iehdr->e_phoff
7295 + iehdr->e_phnum * iehdr->e_phentsize)));
7297 if (segment->p_type == PT_LOAD && map->includes_phdrs)
7298 phdr_included = TRUE;
7301 lowest_section = NULL;
7302 if (section_count != 0)
7304 unsigned int isec = 0;
7306 for (section = first_section;
7308 section = section->next)
7310 this_hdr = &(elf_section_data(section)->this_hdr);
7311 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7313 map->sections[isec++] = section->output_section;
7314 if ((section->flags & SEC_ALLOC) != 0)
7318 if (lowest_section == NULL
7319 || section->lma < lowest_section->lma)
7320 lowest_section = section;
7322 /* Section lmas are set up from PT_LOAD header
7323 p_paddr in _bfd_elf_make_section_from_shdr.
7324 If this header has a p_paddr that disagrees
7325 with the section lma, flag the p_paddr as
7327 if ((section->flags & SEC_LOAD) != 0)
7328 seg_off = this_hdr->sh_offset - segment->p_offset;
7330 seg_off = this_hdr->sh_addr - segment->p_vaddr;
7331 if (section->lma - segment->p_paddr != seg_off)
7332 map->p_paddr_valid = FALSE;
7334 if (isec == section_count)
7340 if (map->includes_filehdr && lowest_section != NULL)
7341 /* We need to keep the space used by the headers fixed. */
7342 map->header_size = lowest_section->vma - segment->p_vaddr;
7344 if (!map->includes_phdrs
7345 && !map->includes_filehdr
7346 && map->p_paddr_valid)
7347 /* There is some other padding before the first section. */
7348 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
7349 - segment->p_paddr);
7351 map->count = section_count;
7352 *pointer_to_map = map;
7353 pointer_to_map = &map->next;
7356 elf_seg_map (obfd) = map_first;
7360 /* Copy private BFD data. This copies or rewrites ELF program header
7364 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
7366 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7367 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7370 if (elf_tdata (ibfd)->phdr == NULL)
7373 if (ibfd->xvec == obfd->xvec)
7375 /* Check to see if any sections in the input BFD
7376 covered by ELF program header have changed. */
7377 Elf_Internal_Phdr *segment;
7378 asection *section, *osec;
7379 unsigned int i, num_segments;
7380 Elf_Internal_Shdr *this_hdr;
7381 const struct elf_backend_data *bed;
7383 bed = get_elf_backend_data (ibfd);
7385 /* Regenerate the segment map if p_paddr is set to 0. */
7386 if (bed->want_p_paddr_set_to_zero)
7389 /* Initialize the segment mark field. */
7390 for (section = obfd->sections; section != NULL;
7391 section = section->next)
7392 section->segment_mark = FALSE;
7394 num_segments = elf_elfheader (ibfd)->e_phnum;
7395 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7399 /* PR binutils/3535. The Solaris linker always sets the p_paddr
7400 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
7401 which severly confuses things, so always regenerate the segment
7402 map in this case. */
7403 if (segment->p_paddr == 0
7404 && segment->p_memsz == 0
7405 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
7408 for (section = ibfd->sections;
7409 section != NULL; section = section->next)
7411 /* We mark the output section so that we know it comes
7412 from the input BFD. */
7413 osec = section->output_section;
7415 osec->segment_mark = TRUE;
7417 /* Check if this section is covered by the segment. */
7418 this_hdr = &(elf_section_data(section)->this_hdr);
7419 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7421 /* FIXME: Check if its output section is changed or
7422 removed. What else do we need to check? */
7424 || section->flags != osec->flags
7425 || section->lma != osec->lma
7426 || section->vma != osec->vma
7427 || section->size != osec->size
7428 || section->rawsize != osec->rawsize
7429 || section->alignment_power != osec->alignment_power)
7435 /* Check to see if any output section do not come from the
7437 for (section = obfd->sections; section != NULL;
7438 section = section->next)
7440 if (!section->segment_mark)
7443 section->segment_mark = FALSE;
7446 return copy_elf_program_header (ibfd, obfd);
7450 if (ibfd->xvec == obfd->xvec)
7452 /* When rewriting program header, set the output maxpagesize to
7453 the maximum alignment of input PT_LOAD segments. */
7454 Elf_Internal_Phdr *segment;
7456 unsigned int num_segments = elf_elfheader (ibfd)->e_phnum;
7457 bfd_vma maxpagesize = 0;
7459 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7462 if (segment->p_type == PT_LOAD
7463 && maxpagesize < segment->p_align)
7465 /* PR 17512: file: f17299af. */
7466 if (segment->p_align > (bfd_vma) 1 << ((sizeof (bfd_vma) * 8) - 2))
7467 /* xgettext:c-format */
7468 _bfd_error_handler (_("%pB: warning: segment alignment of %#"
7469 PRIx64 " is too large"),
7470 ibfd, (uint64_t) segment->p_align);
7472 maxpagesize = segment->p_align;
7475 if (maxpagesize != get_elf_backend_data (obfd)->maxpagesize)
7476 bfd_emul_set_maxpagesize (bfd_get_target (obfd), maxpagesize);
7479 return rewrite_elf_program_header (ibfd, obfd);
7482 /* Initialize private output section information from input section. */
7485 _bfd_elf_init_private_section_data (bfd *ibfd,
7489 struct bfd_link_info *link_info)
7492 Elf_Internal_Shdr *ihdr, *ohdr;
7493 bfd_boolean final_link = (link_info != NULL
7494 && !bfd_link_relocatable (link_info));
7496 if (ibfd->xvec->flavour != bfd_target_elf_flavour
7497 || obfd->xvec->flavour != bfd_target_elf_flavour)
7500 BFD_ASSERT (elf_section_data (osec) != NULL);
7502 /* For objcopy and relocatable link, don't copy the output ELF
7503 section type from input if the output BFD section flags have been
7504 set to something different. For a final link allow some flags
7505 that the linker clears to differ. */
7506 if (elf_section_type (osec) == SHT_NULL
7507 && (osec->flags == isec->flags
7509 && ((osec->flags ^ isec->flags)
7510 & ~(SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_RELOC)) == 0)))
7511 elf_section_type (osec) = elf_section_type (isec);
7513 /* FIXME: Is this correct for all OS/PROC specific flags? */
7514 elf_section_flags (osec) |= (elf_section_flags (isec)
7515 & (SHF_MASKOS | SHF_MASKPROC));
7517 /* Copy sh_info from input for mbind section. */
7518 if (elf_section_flags (isec) & SHF_GNU_MBIND)
7519 elf_section_data (osec)->this_hdr.sh_info
7520 = elf_section_data (isec)->this_hdr.sh_info;
7522 /* Set things up for objcopy and relocatable link. The output
7523 SHT_GROUP section will have its elf_next_in_group pointing back
7524 to the input group members. Ignore linker created group section.
7525 See elfNN_ia64_object_p in elfxx-ia64.c. */
7526 if ((link_info == NULL
7527 || !link_info->resolve_section_groups)
7528 && (elf_sec_group (isec) == NULL
7529 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0))
7531 if (elf_section_flags (isec) & SHF_GROUP)
7532 elf_section_flags (osec) |= SHF_GROUP;
7533 elf_next_in_group (osec) = elf_next_in_group (isec);
7534 elf_section_data (osec)->group = elf_section_data (isec)->group;
7537 /* If not decompress, preserve SHF_COMPRESSED. */
7538 if (!final_link && (ibfd->flags & BFD_DECOMPRESS) == 0)
7539 elf_section_flags (osec) |= (elf_section_flags (isec)
7542 ihdr = &elf_section_data (isec)->this_hdr;
7544 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
7545 don't use the output section of the linked-to section since it
7546 may be NULL at this point. */
7547 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
7549 ohdr = &elf_section_data (osec)->this_hdr;
7550 ohdr->sh_flags |= SHF_LINK_ORDER;
7551 elf_linked_to_section (osec) = elf_linked_to_section (isec);
7554 osec->use_rela_p = isec->use_rela_p;
7559 /* Copy private section information. This copies over the entsize
7560 field, and sometimes the info field. */
7563 _bfd_elf_copy_private_section_data (bfd *ibfd,
7568 Elf_Internal_Shdr *ihdr, *ohdr;
7570 if (ibfd->xvec->flavour != bfd_target_elf_flavour
7571 || obfd->xvec->flavour != bfd_target_elf_flavour)
7574 ihdr = &elf_section_data (isec)->this_hdr;
7575 ohdr = &elf_section_data (osec)->this_hdr;
7577 ohdr->sh_entsize = ihdr->sh_entsize;
7579 if (ihdr->sh_type == SHT_SYMTAB
7580 || ihdr->sh_type == SHT_DYNSYM
7581 || ihdr->sh_type == SHT_GNU_verneed
7582 || ihdr->sh_type == SHT_GNU_verdef)
7583 ohdr->sh_info = ihdr->sh_info;
7585 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
7589 /* Look at all the SHT_GROUP sections in IBFD, making any adjustments
7590 necessary if we are removing either the SHT_GROUP section or any of
7591 the group member sections. DISCARDED is the value that a section's
7592 output_section has if the section will be discarded, NULL when this
7593 function is called from objcopy, bfd_abs_section_ptr when called
7597 _bfd_elf_fixup_group_sections (bfd *ibfd, asection *discarded)
7601 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
7602 if (elf_section_type (isec) == SHT_GROUP)
7604 asection *first = elf_next_in_group (isec);
7605 asection *s = first;
7606 bfd_size_type removed = 0;
7610 /* If this member section is being output but the
7611 SHT_GROUP section is not, then clear the group info
7612 set up by _bfd_elf_copy_private_section_data. */
7613 if (s->output_section != discarded
7614 && isec->output_section == discarded)
7616 elf_section_flags (s->output_section) &= ~SHF_GROUP;
7617 elf_group_name (s->output_section) = NULL;
7619 /* Conversely, if the member section is not being output
7620 but the SHT_GROUP section is, then adjust its size. */
7621 else if (s->output_section == discarded
7622 && isec->output_section != discarded)
7624 struct bfd_elf_section_data *elf_sec = elf_section_data (s);
7626 if (elf_sec->rel.hdr != NULL
7627 && (elf_sec->rel.hdr->sh_flags & SHF_GROUP) != 0)
7629 if (elf_sec->rela.hdr != NULL
7630 && (elf_sec->rela.hdr->sh_flags & SHF_GROUP) != 0)
7633 s = elf_next_in_group (s);
7639 if (discarded != NULL)
7641 /* If we've been called for ld -r, then we need to
7642 adjust the input section size. */
7643 if (isec->rawsize == 0)
7644 isec->rawsize = isec->size;
7645 isec->size = isec->rawsize - removed;
7646 if (isec->size <= 4)
7649 isec->flags |= SEC_EXCLUDE;
7654 /* Adjust the output section size when called from
7656 isec->output_section->size -= removed;
7657 if (isec->output_section->size <= 4)
7659 isec->output_section->size = 0;
7660 isec->output_section->flags |= SEC_EXCLUDE;
7669 /* Copy private header information. */
7672 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
7674 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7675 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7678 /* Copy over private BFD data if it has not already been copied.
7679 This must be done here, rather than in the copy_private_bfd_data
7680 entry point, because the latter is called after the section
7681 contents have been set, which means that the program headers have
7682 already been worked out. */
7683 if (elf_seg_map (obfd) == NULL && elf_tdata (ibfd)->phdr != NULL)
7685 if (! copy_private_bfd_data (ibfd, obfd))
7689 return _bfd_elf_fixup_group_sections (ibfd, NULL);
7692 /* Copy private symbol information. If this symbol is in a section
7693 which we did not map into a BFD section, try to map the section
7694 index correctly. We use special macro definitions for the mapped
7695 section indices; these definitions are interpreted by the
7696 swap_out_syms function. */
7698 #define MAP_ONESYMTAB (SHN_HIOS + 1)
7699 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
7700 #define MAP_STRTAB (SHN_HIOS + 3)
7701 #define MAP_SHSTRTAB (SHN_HIOS + 4)
7702 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
7705 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
7710 elf_symbol_type *isym, *osym;
7712 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7713 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7716 isym = elf_symbol_from (ibfd, isymarg);
7717 osym = elf_symbol_from (obfd, osymarg);
7720 && isym->internal_elf_sym.st_shndx != 0
7722 && bfd_is_abs_section (isym->symbol.section))
7726 shndx = isym->internal_elf_sym.st_shndx;
7727 if (shndx == elf_onesymtab (ibfd))
7728 shndx = MAP_ONESYMTAB;
7729 else if (shndx == elf_dynsymtab (ibfd))
7730 shndx = MAP_DYNSYMTAB;
7731 else if (shndx == elf_strtab_sec (ibfd))
7733 else if (shndx == elf_shstrtab_sec (ibfd))
7734 shndx = MAP_SHSTRTAB;
7735 else if (find_section_in_list (shndx, elf_symtab_shndx_list (ibfd)))
7736 shndx = MAP_SYM_SHNDX;
7737 osym->internal_elf_sym.st_shndx = shndx;
7743 /* Swap out the symbols. */
7746 swap_out_syms (bfd *abfd,
7747 struct elf_strtab_hash **sttp,
7750 const struct elf_backend_data *bed;
7753 struct elf_strtab_hash *stt;
7754 Elf_Internal_Shdr *symtab_hdr;
7755 Elf_Internal_Shdr *symtab_shndx_hdr;
7756 Elf_Internal_Shdr *symstrtab_hdr;
7757 struct elf_sym_strtab *symstrtab;
7758 bfd_byte *outbound_syms;
7759 bfd_byte *outbound_shndx;
7760 unsigned long outbound_syms_index;
7761 unsigned long outbound_shndx_index;
7763 unsigned int num_locals;
7765 bfd_boolean name_local_sections;
7767 if (!elf_map_symbols (abfd, &num_locals))
7770 /* Dump out the symtabs. */
7771 stt = _bfd_elf_strtab_init ();
7775 bed = get_elf_backend_data (abfd);
7776 symcount = bfd_get_symcount (abfd);
7777 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7778 symtab_hdr->sh_type = SHT_SYMTAB;
7779 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
7780 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
7781 symtab_hdr->sh_info = num_locals + 1;
7782 symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
7784 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
7785 symstrtab_hdr->sh_type = SHT_STRTAB;
7787 /* Allocate buffer to swap out the .strtab section. */
7788 symstrtab = (struct elf_sym_strtab *) bfd_malloc ((symcount + 1)
7789 * sizeof (*symstrtab));
7790 if (symstrtab == NULL)
7792 _bfd_elf_strtab_free (stt);
7796 outbound_syms = (bfd_byte *) bfd_alloc2 (abfd, 1 + symcount,
7797 bed->s->sizeof_sym);
7798 if (outbound_syms == NULL)
7801 _bfd_elf_strtab_free (stt);
7805 symtab_hdr->contents = outbound_syms;
7806 outbound_syms_index = 0;
7808 outbound_shndx = NULL;
7809 outbound_shndx_index = 0;
7811 if (elf_symtab_shndx_list (abfd))
7813 symtab_shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr;
7814 if (symtab_shndx_hdr->sh_name != 0)
7816 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
7817 outbound_shndx = (bfd_byte *)
7818 bfd_zalloc2 (abfd, 1 + symcount, sizeof (Elf_External_Sym_Shndx));
7819 if (outbound_shndx == NULL)
7822 symtab_shndx_hdr->contents = outbound_shndx;
7823 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
7824 symtab_shndx_hdr->sh_size = amt;
7825 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
7826 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
7828 /* FIXME: What about any other headers in the list ? */
7831 /* Now generate the data (for "contents"). */
7833 /* Fill in zeroth symbol and swap it out. */
7834 Elf_Internal_Sym sym;
7840 sym.st_shndx = SHN_UNDEF;
7841 sym.st_target_internal = 0;
7842 symstrtab[0].sym = sym;
7843 symstrtab[0].dest_index = outbound_syms_index;
7844 symstrtab[0].destshndx_index = outbound_shndx_index;
7845 outbound_syms_index++;
7846 if (outbound_shndx != NULL)
7847 outbound_shndx_index++;
7851 = (bed->elf_backend_name_local_section_symbols
7852 && bed->elf_backend_name_local_section_symbols (abfd));
7854 syms = bfd_get_outsymbols (abfd);
7855 for (idx = 0; idx < symcount;)
7857 Elf_Internal_Sym sym;
7858 bfd_vma value = syms[idx]->value;
7859 elf_symbol_type *type_ptr;
7860 flagword flags = syms[idx]->flags;
7863 if (!name_local_sections
7864 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
7866 /* Local section symbols have no name. */
7867 sym.st_name = (unsigned long) -1;
7871 /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize
7872 to get the final offset for st_name. */
7874 = (unsigned long) _bfd_elf_strtab_add (stt, syms[idx]->name,
7876 if (sym.st_name == (unsigned long) -1)
7880 type_ptr = elf_symbol_from (abfd, syms[idx]);
7882 if ((flags & BSF_SECTION_SYM) == 0
7883 && bfd_is_com_section (syms[idx]->section))
7885 /* ELF common symbols put the alignment into the `value' field,
7886 and the size into the `size' field. This is backwards from
7887 how BFD handles it, so reverse it here. */
7888 sym.st_size = value;
7889 if (type_ptr == NULL
7890 || type_ptr->internal_elf_sym.st_value == 0)
7891 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
7893 sym.st_value = type_ptr->internal_elf_sym.st_value;
7894 sym.st_shndx = _bfd_elf_section_from_bfd_section
7895 (abfd, syms[idx]->section);
7899 asection *sec = syms[idx]->section;
7902 if (sec->output_section)
7904 value += sec->output_offset;
7905 sec = sec->output_section;
7908 /* Don't add in the section vma for relocatable output. */
7909 if (! relocatable_p)
7911 sym.st_value = value;
7912 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
7914 if (bfd_is_abs_section (sec)
7916 && type_ptr->internal_elf_sym.st_shndx != 0)
7918 /* This symbol is in a real ELF section which we did
7919 not create as a BFD section. Undo the mapping done
7920 by copy_private_symbol_data. */
7921 shndx = type_ptr->internal_elf_sym.st_shndx;
7925 shndx = elf_onesymtab (abfd);
7928 shndx = elf_dynsymtab (abfd);
7931 shndx = elf_strtab_sec (abfd);
7934 shndx = elf_shstrtab_sec (abfd);
7937 if (elf_symtab_shndx_list (abfd))
7938 shndx = elf_symtab_shndx_list (abfd)->ndx;
7947 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
7949 if (shndx == SHN_BAD)
7953 /* Writing this would be a hell of a lot easier if
7954 we had some decent documentation on bfd, and
7955 knew what to expect of the library, and what to
7956 demand of applications. For example, it
7957 appears that `objcopy' might not set the
7958 section of a symbol to be a section that is
7959 actually in the output file. */
7960 sec2 = bfd_get_section_by_name (abfd, sec->name);
7962 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
7963 if (shndx == SHN_BAD)
7965 /* xgettext:c-format */
7967 (_("unable to find equivalent output section"
7968 " for symbol '%s' from section '%s'"),
7969 syms[idx]->name ? syms[idx]->name : "<Local sym>",
7971 bfd_set_error (bfd_error_invalid_operation);
7977 sym.st_shndx = shndx;
7980 if ((flags & BSF_THREAD_LOCAL) != 0)
7982 else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0)
7983 type = STT_GNU_IFUNC;
7984 else if ((flags & BSF_FUNCTION) != 0)
7986 else if ((flags & BSF_OBJECT) != 0)
7988 else if ((flags & BSF_RELC) != 0)
7990 else if ((flags & BSF_SRELC) != 0)
7995 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
7998 /* Processor-specific types. */
7999 if (type_ptr != NULL
8000 && bed->elf_backend_get_symbol_type)
8001 type = ((*bed->elf_backend_get_symbol_type)
8002 (&type_ptr->internal_elf_sym, type));
8004 if (flags & BSF_SECTION_SYM)
8006 if (flags & BSF_GLOBAL)
8007 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
8009 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
8011 else if (bfd_is_com_section (syms[idx]->section))
8013 if (type != STT_TLS)
8015 if ((abfd->flags & BFD_CONVERT_ELF_COMMON))
8016 type = ((abfd->flags & BFD_USE_ELF_STT_COMMON)
8017 ? STT_COMMON : STT_OBJECT);
8019 type = ((flags & BSF_ELF_COMMON) != 0
8020 ? STT_COMMON : STT_OBJECT);
8022 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
8024 else if (bfd_is_und_section (syms[idx]->section))
8025 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
8029 else if (flags & BSF_FILE)
8030 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
8033 int bind = STB_LOCAL;
8035 if (flags & BSF_LOCAL)
8037 else if (flags & BSF_GNU_UNIQUE)
8038 bind = STB_GNU_UNIQUE;
8039 else if (flags & BSF_WEAK)
8041 else if (flags & BSF_GLOBAL)
8044 sym.st_info = ELF_ST_INFO (bind, type);
8047 if (type_ptr != NULL)
8049 sym.st_other = type_ptr->internal_elf_sym.st_other;
8050 sym.st_target_internal
8051 = type_ptr->internal_elf_sym.st_target_internal;
8056 sym.st_target_internal = 0;
8060 symstrtab[idx].sym = sym;
8061 symstrtab[idx].dest_index = outbound_syms_index;
8062 symstrtab[idx].destshndx_index = outbound_shndx_index;
8064 outbound_syms_index++;
8065 if (outbound_shndx != NULL)
8066 outbound_shndx_index++;
8069 /* Finalize the .strtab section. */
8070 _bfd_elf_strtab_finalize (stt);
8072 /* Swap out the .strtab section. */
8073 for (idx = 0; idx <= symcount; idx++)
8075 struct elf_sym_strtab *elfsym = &symstrtab[idx];
8076 if (elfsym->sym.st_name == (unsigned long) -1)
8077 elfsym->sym.st_name = 0;
8079 elfsym->sym.st_name = _bfd_elf_strtab_offset (stt,
8080 elfsym->sym.st_name);
8081 bed->s->swap_symbol_out (abfd, &elfsym->sym,
8083 + (elfsym->dest_index
8084 * bed->s->sizeof_sym)),
8086 + (elfsym->destshndx_index
8087 * sizeof (Elf_External_Sym_Shndx))));
8092 symstrtab_hdr->sh_size = _bfd_elf_strtab_size (stt);
8093 symstrtab_hdr->sh_type = SHT_STRTAB;
8094 symstrtab_hdr->sh_flags = bed->elf_strtab_flags;
8095 symstrtab_hdr->sh_addr = 0;
8096 symstrtab_hdr->sh_entsize = 0;
8097 symstrtab_hdr->sh_link = 0;
8098 symstrtab_hdr->sh_info = 0;
8099 symstrtab_hdr->sh_addralign = 1;
8104 /* Return the number of bytes required to hold the symtab vector.
8106 Note that we base it on the count plus 1, since we will null terminate
8107 the vector allocated based on this size. However, the ELF symbol table
8108 always has a dummy entry as symbol #0, so it ends up even. */
8111 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
8115 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
8117 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
8118 symtab_size = (symcount + 1) * (sizeof (asymbol *));
8120 symtab_size -= sizeof (asymbol *);
8126 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
8130 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
8132 if (elf_dynsymtab (abfd) == 0)
8134 bfd_set_error (bfd_error_invalid_operation);
8138 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
8139 symtab_size = (symcount + 1) * (sizeof (asymbol *));
8141 symtab_size -= sizeof (asymbol *);
8147 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
8150 return (asect->reloc_count + 1) * sizeof (arelent *);
8153 /* Canonicalize the relocs. */
8156 _bfd_elf_canonicalize_reloc (bfd *abfd,
8163 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8165 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
8168 tblptr = section->relocation;
8169 for (i = 0; i < section->reloc_count; i++)
8170 *relptr++ = tblptr++;
8174 return section->reloc_count;
8178 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
8180 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8181 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
8184 bfd_get_symcount (abfd) = symcount;
8189 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
8190 asymbol **allocation)
8192 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8193 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
8196 bfd_get_dynamic_symcount (abfd) = symcount;
8200 /* Return the size required for the dynamic reloc entries. Any loadable
8201 section that was actually installed in the BFD, and has type SHT_REL
8202 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
8203 dynamic reloc section. */
8206 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
8211 if (elf_dynsymtab (abfd) == 0)
8213 bfd_set_error (bfd_error_invalid_operation);
8217 ret = sizeof (arelent *);
8218 for (s = abfd->sections; s != NULL; s = s->next)
8219 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
8220 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
8221 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
8222 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
8223 * sizeof (arelent *));
8228 /* Canonicalize the dynamic relocation entries. Note that we return the
8229 dynamic relocations as a single block, although they are actually
8230 associated with particular sections; the interface, which was
8231 designed for SunOS style shared libraries, expects that there is only
8232 one set of dynamic relocs. Any loadable section that was actually
8233 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
8234 dynamic symbol table, is considered to be a dynamic reloc section. */
8237 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
8241 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8245 if (elf_dynsymtab (abfd) == 0)
8247 bfd_set_error (bfd_error_invalid_operation);
8251 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8253 for (s = abfd->sections; s != NULL; s = s->next)
8255 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
8256 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
8257 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
8262 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
8264 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
8266 for (i = 0; i < count; i++)
8277 /* Read in the version information. */
8280 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
8282 bfd_byte *contents = NULL;
8283 unsigned int freeidx = 0;
8285 if (elf_dynverref (abfd) != 0)
8287 Elf_Internal_Shdr *hdr;
8288 Elf_External_Verneed *everneed;
8289 Elf_Internal_Verneed *iverneed;
8291 bfd_byte *contents_end;
8293 hdr = &elf_tdata (abfd)->dynverref_hdr;
8295 if (hdr->sh_info == 0
8296 || hdr->sh_info > hdr->sh_size / sizeof (Elf_External_Verneed))
8298 error_return_bad_verref:
8300 (_("%pB: .gnu.version_r invalid entry"), abfd);
8301 bfd_set_error (bfd_error_bad_value);
8302 error_return_verref:
8303 elf_tdata (abfd)->verref = NULL;
8304 elf_tdata (abfd)->cverrefs = 0;
8308 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
8309 if (contents == NULL)
8310 goto error_return_verref;
8312 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
8313 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
8314 goto error_return_verref;
8316 elf_tdata (abfd)->verref = (Elf_Internal_Verneed *)
8317 bfd_alloc2 (abfd, hdr->sh_info, sizeof (Elf_Internal_Verneed));
8319 if (elf_tdata (abfd)->verref == NULL)
8320 goto error_return_verref;
8322 BFD_ASSERT (sizeof (Elf_External_Verneed)
8323 == sizeof (Elf_External_Vernaux));
8324 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
8325 everneed = (Elf_External_Verneed *) contents;
8326 iverneed = elf_tdata (abfd)->verref;
8327 for (i = 0; i < hdr->sh_info; i++, iverneed++)
8329 Elf_External_Vernaux *evernaux;
8330 Elf_Internal_Vernaux *ivernaux;
8333 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
8335 iverneed->vn_bfd = abfd;
8337 iverneed->vn_filename =
8338 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8340 if (iverneed->vn_filename == NULL)
8341 goto error_return_bad_verref;
8343 if (iverneed->vn_cnt == 0)
8344 iverneed->vn_auxptr = NULL;
8347 iverneed->vn_auxptr = (struct elf_internal_vernaux *)
8348 bfd_alloc2 (abfd, iverneed->vn_cnt,
8349 sizeof (Elf_Internal_Vernaux));
8350 if (iverneed->vn_auxptr == NULL)
8351 goto error_return_verref;
8354 if (iverneed->vn_aux
8355 > (size_t) (contents_end - (bfd_byte *) everneed))
8356 goto error_return_bad_verref;
8358 evernaux = ((Elf_External_Vernaux *)
8359 ((bfd_byte *) everneed + iverneed->vn_aux));
8360 ivernaux = iverneed->vn_auxptr;
8361 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
8363 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
8365 ivernaux->vna_nodename =
8366 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8367 ivernaux->vna_name);
8368 if (ivernaux->vna_nodename == NULL)
8369 goto error_return_bad_verref;
8371 if (ivernaux->vna_other > freeidx)
8372 freeidx = ivernaux->vna_other;
8374 ivernaux->vna_nextptr = NULL;
8375 if (ivernaux->vna_next == 0)
8377 iverneed->vn_cnt = j + 1;
8380 if (j + 1 < iverneed->vn_cnt)
8381 ivernaux->vna_nextptr = ivernaux + 1;
8383 if (ivernaux->vna_next
8384 > (size_t) (contents_end - (bfd_byte *) evernaux))
8385 goto error_return_bad_verref;
8387 evernaux = ((Elf_External_Vernaux *)
8388 ((bfd_byte *) evernaux + ivernaux->vna_next));
8391 iverneed->vn_nextref = NULL;
8392 if (iverneed->vn_next == 0)
8394 if (i + 1 < hdr->sh_info)
8395 iverneed->vn_nextref = iverneed + 1;
8397 if (iverneed->vn_next
8398 > (size_t) (contents_end - (bfd_byte *) everneed))
8399 goto error_return_bad_verref;
8401 everneed = ((Elf_External_Verneed *)
8402 ((bfd_byte *) everneed + iverneed->vn_next));
8404 elf_tdata (abfd)->cverrefs = i;
8410 if (elf_dynverdef (abfd) != 0)
8412 Elf_Internal_Shdr *hdr;
8413 Elf_External_Verdef *everdef;
8414 Elf_Internal_Verdef *iverdef;
8415 Elf_Internal_Verdef *iverdefarr;
8416 Elf_Internal_Verdef iverdefmem;
8418 unsigned int maxidx;
8419 bfd_byte *contents_end_def, *contents_end_aux;
8421 hdr = &elf_tdata (abfd)->dynverdef_hdr;
8423 if (hdr->sh_info == 0 || hdr->sh_size < sizeof (Elf_External_Verdef))
8425 error_return_bad_verdef:
8427 (_("%pB: .gnu.version_d invalid entry"), abfd);
8428 bfd_set_error (bfd_error_bad_value);
8429 error_return_verdef:
8430 elf_tdata (abfd)->verdef = NULL;
8431 elf_tdata (abfd)->cverdefs = 0;
8435 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
8436 if (contents == NULL)
8437 goto error_return_verdef;
8438 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
8439 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
8440 goto error_return_verdef;
8442 BFD_ASSERT (sizeof (Elf_External_Verdef)
8443 >= sizeof (Elf_External_Verdaux));
8444 contents_end_def = contents + hdr->sh_size
8445 - sizeof (Elf_External_Verdef);
8446 contents_end_aux = contents + hdr->sh_size
8447 - sizeof (Elf_External_Verdaux);
8449 /* We know the number of entries in the section but not the maximum
8450 index. Therefore we have to run through all entries and find
8452 everdef = (Elf_External_Verdef *) contents;
8454 for (i = 0; i < hdr->sh_info; ++i)
8456 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
8458 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) == 0)
8459 goto error_return_bad_verdef;
8460 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
8461 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
8463 if (iverdefmem.vd_next == 0)
8466 if (iverdefmem.vd_next
8467 > (size_t) (contents_end_def - (bfd_byte *) everdef))
8468 goto error_return_bad_verdef;
8470 everdef = ((Elf_External_Verdef *)
8471 ((bfd_byte *) everdef + iverdefmem.vd_next));
8474 if (default_imported_symver)
8476 if (freeidx > maxidx)
8482 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
8483 bfd_zalloc2 (abfd, maxidx, sizeof (Elf_Internal_Verdef));
8484 if (elf_tdata (abfd)->verdef == NULL)
8485 goto error_return_verdef;
8487 elf_tdata (abfd)->cverdefs = maxidx;
8489 everdef = (Elf_External_Verdef *) contents;
8490 iverdefarr = elf_tdata (abfd)->verdef;
8491 for (i = 0; i < hdr->sh_info; i++)
8493 Elf_External_Verdaux *everdaux;
8494 Elf_Internal_Verdaux *iverdaux;
8497 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
8499 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
8500 goto error_return_bad_verdef;
8502 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
8503 memcpy (iverdef, &iverdefmem, offsetof (Elf_Internal_Verdef, vd_bfd));
8505 iverdef->vd_bfd = abfd;
8507 if (iverdef->vd_cnt == 0)
8508 iverdef->vd_auxptr = NULL;
8511 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
8512 bfd_alloc2 (abfd, iverdef->vd_cnt,
8513 sizeof (Elf_Internal_Verdaux));
8514 if (iverdef->vd_auxptr == NULL)
8515 goto error_return_verdef;
8519 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
8520 goto error_return_bad_verdef;
8522 everdaux = ((Elf_External_Verdaux *)
8523 ((bfd_byte *) everdef + iverdef->vd_aux));
8524 iverdaux = iverdef->vd_auxptr;
8525 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
8527 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
8529 iverdaux->vda_nodename =
8530 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8531 iverdaux->vda_name);
8532 if (iverdaux->vda_nodename == NULL)
8533 goto error_return_bad_verdef;
8535 iverdaux->vda_nextptr = NULL;
8536 if (iverdaux->vda_next == 0)
8538 iverdef->vd_cnt = j + 1;
8541 if (j + 1 < iverdef->vd_cnt)
8542 iverdaux->vda_nextptr = iverdaux + 1;
8544 if (iverdaux->vda_next
8545 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
8546 goto error_return_bad_verdef;
8548 everdaux = ((Elf_External_Verdaux *)
8549 ((bfd_byte *) everdaux + iverdaux->vda_next));
8552 iverdef->vd_nodename = NULL;
8553 if (iverdef->vd_cnt)
8554 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
8556 iverdef->vd_nextdef = NULL;
8557 if (iverdef->vd_next == 0)
8559 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
8560 iverdef->vd_nextdef = iverdef + 1;
8562 everdef = ((Elf_External_Verdef *)
8563 ((bfd_byte *) everdef + iverdef->vd_next));
8569 else if (default_imported_symver)
8576 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
8577 bfd_zalloc2 (abfd, freeidx, sizeof (Elf_Internal_Verdef));
8578 if (elf_tdata (abfd)->verdef == NULL)
8581 elf_tdata (abfd)->cverdefs = freeidx;
8584 /* Create a default version based on the soname. */
8585 if (default_imported_symver)
8587 Elf_Internal_Verdef *iverdef;
8588 Elf_Internal_Verdaux *iverdaux;
8590 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];
8592 iverdef->vd_version = VER_DEF_CURRENT;
8593 iverdef->vd_flags = 0;
8594 iverdef->vd_ndx = freeidx;
8595 iverdef->vd_cnt = 1;
8597 iverdef->vd_bfd = abfd;
8599 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
8600 if (iverdef->vd_nodename == NULL)
8601 goto error_return_verdef;
8602 iverdef->vd_nextdef = NULL;
8603 iverdef->vd_auxptr = ((struct elf_internal_verdaux *)
8604 bfd_zalloc (abfd, sizeof (Elf_Internal_Verdaux)));
8605 if (iverdef->vd_auxptr == NULL)
8606 goto error_return_verdef;
8608 iverdaux = iverdef->vd_auxptr;
8609 iverdaux->vda_nodename = iverdef->vd_nodename;
8615 if (contents != NULL)
8621 _bfd_elf_make_empty_symbol (bfd *abfd)
8623 elf_symbol_type *newsym;
8625 newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof * newsym);
8628 newsym->symbol.the_bfd = abfd;
8629 return &newsym->symbol;
8633 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
8637 bfd_symbol_info (symbol, ret);
8640 /* Return whether a symbol name implies a local symbol. Most targets
8641 use this function for the is_local_label_name entry point, but some
8645 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
8648 /* Normal local symbols start with ``.L''. */
8649 if (name[0] == '.' && name[1] == 'L')
8652 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
8653 DWARF debugging symbols starting with ``..''. */
8654 if (name[0] == '.' && name[1] == '.')
8657 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
8658 emitting DWARF debugging output. I suspect this is actually a
8659 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
8660 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
8661 underscore to be emitted on some ELF targets). For ease of use,
8662 we treat such symbols as local. */
8663 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
8666 /* Treat assembler generated fake symbols, dollar local labels and
8667 forward-backward labels (aka local labels) as locals.
8668 These labels have the form:
8670 L0^A.* (fake symbols)
8672 [.]?L[0123456789]+{^A|^B}[0123456789]* (local labels)
8674 Versions which start with .L will have already been matched above,
8675 so we only need to match the rest. */
8676 if (name[0] == 'L' && ISDIGIT (name[1]))
8678 bfd_boolean ret = FALSE;
8682 for (p = name + 2; (c = *p); p++)
8684 if (c == 1 || c == 2)
8686 if (c == 1 && p == name + 2)
8687 /* A fake symbol. */
8690 /* FIXME: We are being paranoid here and treating symbols like
8691 L0^Bfoo as if there were non-local, on the grounds that the
8692 assembler will never generate them. But can any symbol
8693 containing an ASCII value in the range 1-31 ever be anything
8694 other than some kind of local ? */
8711 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
8712 asymbol *symbol ATTRIBUTE_UNUSED)
8719 _bfd_elf_set_arch_mach (bfd *abfd,
8720 enum bfd_architecture arch,
8721 unsigned long machine)
8723 /* If this isn't the right architecture for this backend, and this
8724 isn't the generic backend, fail. */
8725 if (arch != get_elf_backend_data (abfd)->arch
8726 && arch != bfd_arch_unknown
8727 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
8730 return bfd_default_set_arch_mach (abfd, arch, machine);
8733 /* Find the nearest line to a particular section and offset,
8734 for error reporting. */
8737 _bfd_elf_find_nearest_line (bfd *abfd,
8741 const char **filename_ptr,
8742 const char **functionname_ptr,
8743 unsigned int *line_ptr,
8744 unsigned int *discriminator_ptr)
8748 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
8749 filename_ptr, functionname_ptr,
8750 line_ptr, discriminator_ptr,
8751 dwarf_debug_sections, 0,
8752 &elf_tdata (abfd)->dwarf2_find_line_info)
8753 || _bfd_dwarf1_find_nearest_line (abfd, symbols, section, offset,
8754 filename_ptr, functionname_ptr,
8757 if (!*functionname_ptr)
8758 _bfd_elf_find_function (abfd, symbols, section, offset,
8759 *filename_ptr ? NULL : filename_ptr,
8764 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
8765 &found, filename_ptr,
8766 functionname_ptr, line_ptr,
8767 &elf_tdata (abfd)->line_info))
8769 if (found && (*functionname_ptr || *line_ptr))
8772 if (symbols == NULL)
8775 if (! _bfd_elf_find_function (abfd, symbols, section, offset,
8776 filename_ptr, functionname_ptr))
8783 /* Find the line for a symbol. */
8786 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
8787 const char **filename_ptr, unsigned int *line_ptr)
8789 return _bfd_dwarf2_find_nearest_line (abfd, symbols, symbol, NULL, 0,
8790 filename_ptr, NULL, line_ptr, NULL,
8791 dwarf_debug_sections, 0,
8792 &elf_tdata (abfd)->dwarf2_find_line_info);
8795 /* After a call to bfd_find_nearest_line, successive calls to
8796 bfd_find_inliner_info can be used to get source information about
8797 each level of function inlining that terminated at the address
8798 passed to bfd_find_nearest_line. Currently this is only supported
8799 for DWARF2 with appropriate DWARF3 extensions. */
8802 _bfd_elf_find_inliner_info (bfd *abfd,
8803 const char **filename_ptr,
8804 const char **functionname_ptr,
8805 unsigned int *line_ptr)
8808 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
8809 functionname_ptr, line_ptr,
8810 & elf_tdata (abfd)->dwarf2_find_line_info);
8815 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
8817 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8818 int ret = bed->s->sizeof_ehdr;
8820 if (!bfd_link_relocatable (info))
8822 bfd_size_type phdr_size = elf_program_header_size (abfd);
8824 if (phdr_size == (bfd_size_type) -1)
8826 struct elf_segment_map *m;
8829 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
8830 phdr_size += bed->s->sizeof_phdr;
8833 phdr_size = get_program_header_size (abfd, info);
8836 elf_program_header_size (abfd) = phdr_size;
8844 _bfd_elf_set_section_contents (bfd *abfd,
8846 const void *location,
8848 bfd_size_type count)
8850 Elf_Internal_Shdr *hdr;
8853 if (! abfd->output_has_begun
8854 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
8860 hdr = &elf_section_data (section)->this_hdr;
8861 if (hdr->sh_offset == (file_ptr) -1)
8863 /* We must compress this section. Write output to the buffer. */
8864 unsigned char *contents = hdr->contents;
8865 if ((offset + count) > hdr->sh_size
8866 || (section->flags & SEC_ELF_COMPRESS) == 0
8867 || contents == NULL)
8869 memcpy (contents + offset, location, count);
8872 pos = hdr->sh_offset + offset;
8873 if (bfd_seek (abfd, pos, SEEK_SET) != 0
8874 || bfd_bwrite (location, count, abfd) != count)
8881 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
8882 arelent *cache_ptr ATTRIBUTE_UNUSED,
8883 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
8889 /* Try to convert a non-ELF reloc into an ELF one. */
8892 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
8894 /* Check whether we really have an ELF howto. */
8896 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
8898 bfd_reloc_code_real_type code;
8899 reloc_howto_type *howto;
8901 /* Alien reloc: Try to determine its type to replace it with an
8902 equivalent ELF reloc. */
8904 if (areloc->howto->pc_relative)
8906 switch (areloc->howto->bitsize)
8909 code = BFD_RELOC_8_PCREL;
8912 code = BFD_RELOC_12_PCREL;
8915 code = BFD_RELOC_16_PCREL;
8918 code = BFD_RELOC_24_PCREL;
8921 code = BFD_RELOC_32_PCREL;
8924 code = BFD_RELOC_64_PCREL;
8930 howto = bfd_reloc_type_lookup (abfd, code);
8932 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
8934 if (howto->pcrel_offset)
8935 areloc->addend += areloc->address;
8937 areloc->addend -= areloc->address; /* addend is unsigned!! */
8942 switch (areloc->howto->bitsize)
8948 code = BFD_RELOC_14;
8951 code = BFD_RELOC_16;
8954 code = BFD_RELOC_26;
8957 code = BFD_RELOC_32;
8960 code = BFD_RELOC_64;
8966 howto = bfd_reloc_type_lookup (abfd, code);
8970 areloc->howto = howto;
8978 /* xgettext:c-format */
8979 _bfd_error_handler (_("%pB: %s unsupported"),
8980 abfd, areloc->howto->name);
8981 bfd_set_error (bfd_error_bad_value);
8986 _bfd_elf_close_and_cleanup (bfd *abfd)
8988 struct elf_obj_tdata *tdata = elf_tdata (abfd);
8989 if (bfd_get_format (abfd) == bfd_object && tdata != NULL)
8991 if (elf_tdata (abfd)->o != NULL && elf_shstrtab (abfd) != NULL)
8992 _bfd_elf_strtab_free (elf_shstrtab (abfd));
8993 _bfd_dwarf2_cleanup_debug_info (abfd, &tdata->dwarf2_find_line_info);
8996 return _bfd_generic_close_and_cleanup (abfd);
8999 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
9000 in the relocation's offset. Thus we cannot allow any sort of sanity
9001 range-checking to interfere. There is nothing else to do in processing
9004 bfd_reloc_status_type
9005 _bfd_elf_rel_vtable_reloc_fn
9006 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
9007 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
9008 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
9009 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
9011 return bfd_reloc_ok;
9014 /* Elf core file support. Much of this only works on native
9015 toolchains, since we rely on knowing the
9016 machine-dependent procfs structure in order to pick
9017 out details about the corefile. */
9019 #ifdef HAVE_SYS_PROCFS_H
9020 /* Needed for new procfs interface on sparc-solaris. */
9021 # define _STRUCTURED_PROC 1
9022 # include <sys/procfs.h>
9025 /* Return a PID that identifies a "thread" for threaded cores, or the
9026 PID of the main process for non-threaded cores. */
9029 elfcore_make_pid (bfd *abfd)
9033 pid = elf_tdata (abfd)->core->lwpid;
9035 pid = elf_tdata (abfd)->core->pid;
9040 /* If there isn't a section called NAME, make one, using
9041 data from SECT. Note, this function will generate a
9042 reference to NAME, so you shouldn't deallocate or
9046 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
9050 if (bfd_get_section_by_name (abfd, name) != NULL)
9053 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
9057 sect2->size = sect->size;
9058 sect2->filepos = sect->filepos;
9059 sect2->alignment_power = sect->alignment_power;
9063 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
9064 actually creates up to two pseudosections:
9065 - For the single-threaded case, a section named NAME, unless
9066 such a section already exists.
9067 - For the multi-threaded case, a section named "NAME/PID", where
9068 PID is elfcore_make_pid (abfd).
9069 Both pseudosections have identical contents. */
9071 _bfd_elfcore_make_pseudosection (bfd *abfd,
9077 char *threaded_name;
9081 /* Build the section name. */
9083 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
9084 len = strlen (buf) + 1;
9085 threaded_name = (char *) bfd_alloc (abfd, len);
9086 if (threaded_name == NULL)
9088 memcpy (threaded_name, buf, len);
9090 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
9095 sect->filepos = filepos;
9096 sect->alignment_power = 2;
9098 return elfcore_maybe_make_sect (abfd, name, sect);
9101 /* prstatus_t exists on:
9103 linux 2.[01] + glibc
9107 #if defined (HAVE_PRSTATUS_T)
9110 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
9115 if (note->descsz == sizeof (prstatus_t))
9119 size = sizeof (prstat.pr_reg);
9120 offset = offsetof (prstatus_t, pr_reg);
9121 memcpy (&prstat, note->descdata, sizeof (prstat));
9123 /* Do not overwrite the core signal if it
9124 has already been set by another thread. */
9125 if (elf_tdata (abfd)->core->signal == 0)
9126 elf_tdata (abfd)->core->signal = prstat.pr_cursig;
9127 if (elf_tdata (abfd)->core->pid == 0)
9128 elf_tdata (abfd)->core->pid = prstat.pr_pid;
9130 /* pr_who exists on:
9133 pr_who doesn't exist on:
9136 #if defined (HAVE_PRSTATUS_T_PR_WHO)
9137 elf_tdata (abfd)->core->lwpid = prstat.pr_who;
9139 elf_tdata (abfd)->core->lwpid = prstat.pr_pid;
9142 #if defined (HAVE_PRSTATUS32_T)
9143 else if (note->descsz == sizeof (prstatus32_t))
9145 /* 64-bit host, 32-bit corefile */
9146 prstatus32_t prstat;
9148 size = sizeof (prstat.pr_reg);
9149 offset = offsetof (prstatus32_t, pr_reg);
9150 memcpy (&prstat, note->descdata, sizeof (prstat));
9152 /* Do not overwrite the core signal if it
9153 has already been set by another thread. */
9154 if (elf_tdata (abfd)->core->signal == 0)
9155 elf_tdata (abfd)->core->signal = prstat.pr_cursig;
9156 if (elf_tdata (abfd)->core->pid == 0)
9157 elf_tdata (abfd)->core->pid = prstat.pr_pid;
9159 /* pr_who exists on:
9162 pr_who doesn't exist on:
9165 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
9166 elf_tdata (abfd)->core->lwpid = prstat.pr_who;
9168 elf_tdata (abfd)->core->lwpid = prstat.pr_pid;
9171 #endif /* HAVE_PRSTATUS32_T */
9174 /* Fail - we don't know how to handle any other
9175 note size (ie. data object type). */
9179 /* Make a ".reg/999" section and a ".reg" section. */
9180 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
9181 size, note->descpos + offset);
9183 #endif /* defined (HAVE_PRSTATUS_T) */
9185 /* Create a pseudosection containing the exact contents of NOTE. */
9187 elfcore_make_note_pseudosection (bfd *abfd,
9189 Elf_Internal_Note *note)
9191 return _bfd_elfcore_make_pseudosection (abfd, name,
9192 note->descsz, note->descpos);
9195 /* There isn't a consistent prfpregset_t across platforms,
9196 but it doesn't matter, because we don't have to pick this
9197 data structure apart. */
9200 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
9202 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
9205 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
9206 type of NT_PRXFPREG. Just include the whole note's contents
9210 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
9212 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
9215 /* Linux dumps the Intel XSAVE extended state in a note named "LINUX"
9216 with a note type of NT_X86_XSTATE. Just include the whole note's
9217 contents literally. */
9220 elfcore_grok_xstatereg (bfd *abfd, Elf_Internal_Note *note)
9222 return elfcore_make_note_pseudosection (abfd, ".reg-xstate", note);
9226 elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note)
9228 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note);
9232 elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note)
9234 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note);
9238 elfcore_grok_s390_high_gprs (bfd *abfd, Elf_Internal_Note *note)
9240 return elfcore_make_note_pseudosection (abfd, ".reg-s390-high-gprs", note);
9244 elfcore_grok_s390_timer (bfd *abfd, Elf_Internal_Note *note)
9246 return elfcore_make_note_pseudosection (abfd, ".reg-s390-timer", note);
9250 elfcore_grok_s390_todcmp (bfd *abfd, Elf_Internal_Note *note)
9252 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todcmp", note);
9256 elfcore_grok_s390_todpreg (bfd *abfd, Elf_Internal_Note *note)
9258 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todpreg", note);
9262 elfcore_grok_s390_ctrs (bfd *abfd, Elf_Internal_Note *note)
9264 return elfcore_make_note_pseudosection (abfd, ".reg-s390-ctrs", note);
9268 elfcore_grok_s390_prefix (bfd *abfd, Elf_Internal_Note *note)
9270 return elfcore_make_note_pseudosection (abfd, ".reg-s390-prefix", note);
9274 elfcore_grok_s390_last_break (bfd *abfd, Elf_Internal_Note *note)
9276 return elfcore_make_note_pseudosection (abfd, ".reg-s390-last-break", note);
9280 elfcore_grok_s390_system_call (bfd *abfd, Elf_Internal_Note *note)
9282 return elfcore_make_note_pseudosection (abfd, ".reg-s390-system-call", note);
9286 elfcore_grok_s390_tdb (bfd *abfd, Elf_Internal_Note *note)
9288 return elfcore_make_note_pseudosection (abfd, ".reg-s390-tdb", note);
9292 elfcore_grok_s390_vxrs_low (bfd *abfd, Elf_Internal_Note *note)
9294 return elfcore_make_note_pseudosection (abfd, ".reg-s390-vxrs-low", note);
9298 elfcore_grok_s390_vxrs_high (bfd *abfd, Elf_Internal_Note *note)
9300 return elfcore_make_note_pseudosection (abfd, ".reg-s390-vxrs-high", note);
9304 elfcore_grok_s390_gs_cb (bfd *abfd, Elf_Internal_Note *note)
9306 return elfcore_make_note_pseudosection (abfd, ".reg-s390-gs-cb", note);
9310 elfcore_grok_s390_gs_bc (bfd *abfd, Elf_Internal_Note *note)
9312 return elfcore_make_note_pseudosection (abfd, ".reg-s390-gs-bc", note);
9316 elfcore_grok_arm_vfp (bfd *abfd, Elf_Internal_Note *note)
9318 return elfcore_make_note_pseudosection (abfd, ".reg-arm-vfp", note);
9322 elfcore_grok_aarch_tls (bfd *abfd, Elf_Internal_Note *note)
9324 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-tls", note);
9328 elfcore_grok_aarch_hw_break (bfd *abfd, Elf_Internal_Note *note)
9330 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-break", note);
9334 elfcore_grok_aarch_hw_watch (bfd *abfd, Elf_Internal_Note *note)
9336 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-watch", note);
9339 #if defined (HAVE_PRPSINFO_T)
9340 typedef prpsinfo_t elfcore_psinfo_t;
9341 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
9342 typedef prpsinfo32_t elfcore_psinfo32_t;
9346 #if defined (HAVE_PSINFO_T)
9347 typedef psinfo_t elfcore_psinfo_t;
9348 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
9349 typedef psinfo32_t elfcore_psinfo32_t;
9353 /* return a malloc'ed copy of a string at START which is at
9354 most MAX bytes long, possibly without a terminating '\0'.
9355 the copy will always have a terminating '\0'. */
9358 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
9361 char *end = (char *) memchr (start, '\0', max);
9369 dups = (char *) bfd_alloc (abfd, len + 1);
9373 memcpy (dups, start, len);
9379 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
9381 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
9383 if (note->descsz == sizeof (elfcore_psinfo_t))
9385 elfcore_psinfo_t psinfo;
9387 memcpy (&psinfo, note->descdata, sizeof (psinfo));
9389 #if defined (HAVE_PSINFO_T_PR_PID) || defined (HAVE_PRPSINFO_T_PR_PID)
9390 elf_tdata (abfd)->core->pid = psinfo.pr_pid;
9392 elf_tdata (abfd)->core->program
9393 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
9394 sizeof (psinfo.pr_fname));
9396 elf_tdata (abfd)->core->command
9397 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
9398 sizeof (psinfo.pr_psargs));
9400 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
9401 else if (note->descsz == sizeof (elfcore_psinfo32_t))
9403 /* 64-bit host, 32-bit corefile */
9404 elfcore_psinfo32_t psinfo;
9406 memcpy (&psinfo, note->descdata, sizeof (psinfo));
9408 #if defined (HAVE_PSINFO32_T_PR_PID) || defined (HAVE_PRPSINFO32_T_PR_PID)
9409 elf_tdata (abfd)->core->pid = psinfo.pr_pid;
9411 elf_tdata (abfd)->core->program
9412 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
9413 sizeof (psinfo.pr_fname));
9415 elf_tdata (abfd)->core->command
9416 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
9417 sizeof (psinfo.pr_psargs));
9423 /* Fail - we don't know how to handle any other
9424 note size (ie. data object type). */
9428 /* Note that for some reason, a spurious space is tacked
9429 onto the end of the args in some (at least one anyway)
9430 implementations, so strip it off if it exists. */
9433 char *command = elf_tdata (abfd)->core->command;
9434 int n = strlen (command);
9436 if (0 < n && command[n - 1] == ' ')
9437 command[n - 1] = '\0';
9442 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
9444 #if defined (HAVE_PSTATUS_T)
9446 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
9448 if (note->descsz == sizeof (pstatus_t)
9449 #if defined (HAVE_PXSTATUS_T)
9450 || note->descsz == sizeof (pxstatus_t)
9456 memcpy (&pstat, note->descdata, sizeof (pstat));
9458 elf_tdata (abfd)->core->pid = pstat.pr_pid;
9460 #if defined (HAVE_PSTATUS32_T)
9461 else if (note->descsz == sizeof (pstatus32_t))
9463 /* 64-bit host, 32-bit corefile */
9466 memcpy (&pstat, note->descdata, sizeof (pstat));
9468 elf_tdata (abfd)->core->pid = pstat.pr_pid;
9471 /* Could grab some more details from the "representative"
9472 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
9473 NT_LWPSTATUS note, presumably. */
9477 #endif /* defined (HAVE_PSTATUS_T) */
9479 #if defined (HAVE_LWPSTATUS_T)
9481 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
9483 lwpstatus_t lwpstat;
9489 if (note->descsz != sizeof (lwpstat)
9490 #if defined (HAVE_LWPXSTATUS_T)
9491 && note->descsz != sizeof (lwpxstatus_t)
9496 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
9498 elf_tdata (abfd)->core->lwpid = lwpstat.pr_lwpid;
9499 /* Do not overwrite the core signal if it has already been set by
9501 if (elf_tdata (abfd)->core->signal == 0)
9502 elf_tdata (abfd)->core->signal = lwpstat.pr_cursig;
9504 /* Make a ".reg/999" section. */
9506 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
9507 len = strlen (buf) + 1;
9508 name = bfd_alloc (abfd, len);
9511 memcpy (name, buf, len);
9513 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9517 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
9518 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
9519 sect->filepos = note->descpos
9520 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
9523 #if defined (HAVE_LWPSTATUS_T_PR_REG)
9524 sect->size = sizeof (lwpstat.pr_reg);
9525 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
9528 sect->alignment_power = 2;
9530 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
9533 /* Make a ".reg2/999" section */
9535 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
9536 len = strlen (buf) + 1;
9537 name = bfd_alloc (abfd, len);
9540 memcpy (name, buf, len);
9542 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9546 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
9547 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
9548 sect->filepos = note->descpos
9549 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
9552 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
9553 sect->size = sizeof (lwpstat.pr_fpreg);
9554 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
9557 sect->alignment_power = 2;
9559 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
9561 #endif /* defined (HAVE_LWPSTATUS_T) */
9564 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
9571 int is_active_thread;
9574 if (note->descsz < 728)
9577 if (! CONST_STRNEQ (note->namedata, "win32"))
9580 type = bfd_get_32 (abfd, note->descdata);
9584 case 1 /* NOTE_INFO_PROCESS */:
9585 /* FIXME: need to add ->core->command. */
9586 /* process_info.pid */
9587 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 8);
9588 /* process_info.signal */
9589 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 12);
9592 case 2 /* NOTE_INFO_THREAD */:
9593 /* Make a ".reg/999" section. */
9594 /* thread_info.tid */
9595 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
9597 len = strlen (buf) + 1;
9598 name = (char *) bfd_alloc (abfd, len);
9602 memcpy (name, buf, len);
9604 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9608 /* sizeof (thread_info.thread_context) */
9610 /* offsetof (thread_info.thread_context) */
9611 sect->filepos = note->descpos + 12;
9612 sect->alignment_power = 2;
9614 /* thread_info.is_active_thread */
9615 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
9617 if (is_active_thread)
9618 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
9622 case 3 /* NOTE_INFO_MODULE */:
9623 /* Make a ".module/xxxxxxxx" section. */
9624 /* module_info.base_address */
9625 base_addr = bfd_get_32 (abfd, note->descdata + 4);
9626 sprintf (buf, ".module/%08lx", (unsigned long) base_addr);
9628 len = strlen (buf) + 1;
9629 name = (char *) bfd_alloc (abfd, len);
9633 memcpy (name, buf, len);
9635 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9640 sect->size = note->descsz;
9641 sect->filepos = note->descpos;
9642 sect->alignment_power = 2;
9653 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
9655 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9663 if (bed->elf_backend_grok_prstatus)
9664 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
9666 #if defined (HAVE_PRSTATUS_T)
9667 return elfcore_grok_prstatus (abfd, note);
9672 #if defined (HAVE_PSTATUS_T)
9674 return elfcore_grok_pstatus (abfd, note);
9677 #if defined (HAVE_LWPSTATUS_T)
9679 return elfcore_grok_lwpstatus (abfd, note);
9682 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
9683 return elfcore_grok_prfpreg (abfd, note);
9685 case NT_WIN32PSTATUS:
9686 return elfcore_grok_win32pstatus (abfd, note);
9688 case NT_PRXFPREG: /* Linux SSE extension */
9689 if (note->namesz == 6
9690 && strcmp (note->namedata, "LINUX") == 0)
9691 return elfcore_grok_prxfpreg (abfd, note);
9695 case NT_X86_XSTATE: /* Linux XSAVE extension */
9696 if (note->namesz == 6
9697 && strcmp (note->namedata, "LINUX") == 0)
9698 return elfcore_grok_xstatereg (abfd, note);
9703 if (note->namesz == 6
9704 && strcmp (note->namedata, "LINUX") == 0)
9705 return elfcore_grok_ppc_vmx (abfd, note);
9710 if (note->namesz == 6
9711 && strcmp (note->namedata, "LINUX") == 0)
9712 return elfcore_grok_ppc_vsx (abfd, note);
9716 case NT_S390_HIGH_GPRS:
9717 if (note->namesz == 6
9718 && strcmp (note->namedata, "LINUX") == 0)
9719 return elfcore_grok_s390_high_gprs (abfd, note);
9724 if (note->namesz == 6
9725 && strcmp (note->namedata, "LINUX") == 0)
9726 return elfcore_grok_s390_timer (abfd, note);
9730 case NT_S390_TODCMP:
9731 if (note->namesz == 6
9732 && strcmp (note->namedata, "LINUX") == 0)
9733 return elfcore_grok_s390_todcmp (abfd, note);
9737 case NT_S390_TODPREG:
9738 if (note->namesz == 6
9739 && strcmp (note->namedata, "LINUX") == 0)
9740 return elfcore_grok_s390_todpreg (abfd, note);
9745 if (note->namesz == 6
9746 && strcmp (note->namedata, "LINUX") == 0)
9747 return elfcore_grok_s390_ctrs (abfd, note);
9751 case NT_S390_PREFIX:
9752 if (note->namesz == 6
9753 && strcmp (note->namedata, "LINUX") == 0)
9754 return elfcore_grok_s390_prefix (abfd, note);
9758 case NT_S390_LAST_BREAK:
9759 if (note->namesz == 6
9760 && strcmp (note->namedata, "LINUX") == 0)
9761 return elfcore_grok_s390_last_break (abfd, note);
9765 case NT_S390_SYSTEM_CALL:
9766 if (note->namesz == 6
9767 && strcmp (note->namedata, "LINUX") == 0)
9768 return elfcore_grok_s390_system_call (abfd, note);
9773 if (note->namesz == 6
9774 && strcmp (note->namedata, "LINUX") == 0)
9775 return elfcore_grok_s390_tdb (abfd, note);
9779 case NT_S390_VXRS_LOW:
9780 if (note->namesz == 6
9781 && strcmp (note->namedata, "LINUX") == 0)
9782 return elfcore_grok_s390_vxrs_low (abfd, note);
9786 case NT_S390_VXRS_HIGH:
9787 if (note->namesz == 6
9788 && strcmp (note->namedata, "LINUX") == 0)
9789 return elfcore_grok_s390_vxrs_high (abfd, note);
9794 if (note->namesz == 6
9795 && strcmp (note->namedata, "LINUX") == 0)
9796 return elfcore_grok_s390_gs_cb (abfd, note);
9801 if (note->namesz == 6
9802 && strcmp (note->namedata, "LINUX") == 0)
9803 return elfcore_grok_s390_gs_bc (abfd, note);
9808 if (note->namesz == 6
9809 && strcmp (note->namedata, "LINUX") == 0)
9810 return elfcore_grok_arm_vfp (abfd, note);
9815 if (note->namesz == 6
9816 && strcmp (note->namedata, "LINUX") == 0)
9817 return elfcore_grok_aarch_tls (abfd, note);
9821 case NT_ARM_HW_BREAK:
9822 if (note->namesz == 6
9823 && strcmp (note->namedata, "LINUX") == 0)
9824 return elfcore_grok_aarch_hw_break (abfd, note);
9828 case NT_ARM_HW_WATCH:
9829 if (note->namesz == 6
9830 && strcmp (note->namedata, "LINUX") == 0)
9831 return elfcore_grok_aarch_hw_watch (abfd, note);
9837 if (bed->elf_backend_grok_psinfo)
9838 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
9840 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
9841 return elfcore_grok_psinfo (abfd, note);
9848 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
9853 sect->size = note->descsz;
9854 sect->filepos = note->descpos;
9855 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
9861 return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.file",
9865 return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.siginfo",
9872 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
9874 struct bfd_build_id* build_id;
9876 if (note->descsz == 0)
9879 build_id = bfd_alloc (abfd, sizeof (struct bfd_build_id) - 1 + note->descsz);
9880 if (build_id == NULL)
9883 build_id->size = note->descsz;
9884 memcpy (build_id->data, note->descdata, note->descsz);
9885 abfd->build_id = build_id;
9891 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
9898 case NT_GNU_PROPERTY_TYPE_0:
9899 return _bfd_elf_parse_gnu_properties (abfd, note);
9901 case NT_GNU_BUILD_ID:
9902 return elfobj_grok_gnu_build_id (abfd, note);
9907 elfobj_grok_stapsdt_note_1 (bfd *abfd, Elf_Internal_Note *note)
9909 struct sdt_note *cur =
9910 (struct sdt_note *) bfd_alloc (abfd, sizeof (struct sdt_note)
9913 cur->next = (struct sdt_note *) (elf_tdata (abfd))->sdt_note_head;
9914 cur->size = (bfd_size_type) note->descsz;
9915 memcpy (cur->data, note->descdata, note->descsz);
9917 elf_tdata (abfd)->sdt_note_head = cur;
9923 elfobj_grok_stapsdt_note (bfd *abfd, Elf_Internal_Note *note)
9928 return elfobj_grok_stapsdt_note_1 (abfd, note);
9936 elfcore_grok_freebsd_psinfo (bfd *abfd, Elf_Internal_Note *note)
9940 switch (elf_elfheader (abfd)->e_ident[EI_CLASS])
9943 if (note->descsz < 108)
9948 if (note->descsz < 120)
9956 /* Check for version 1 in pr_version. */
9957 if (bfd_h_get_32 (abfd, (bfd_byte *) note->descdata) != 1)
9962 /* Skip over pr_psinfosz. */
9963 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS32)
9967 offset += 4; /* Padding before pr_psinfosz. */
9971 /* pr_fname is PRFNAMESZ (16) + 1 bytes in size. */
9972 elf_tdata (abfd)->core->program
9973 = _bfd_elfcore_strndup (abfd, note->descdata + offset, 17);
9976 /* pr_psargs is PRARGSZ (80) + 1 bytes in size. */
9977 elf_tdata (abfd)->core->command
9978 = _bfd_elfcore_strndup (abfd, note->descdata + offset, 81);
9981 /* Padding before pr_pid. */
9984 /* The pr_pid field was added in version "1a". */
9985 if (note->descsz < offset + 4)
9988 elf_tdata (abfd)->core->pid
9989 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
9995 elfcore_grok_freebsd_prstatus (bfd *abfd, Elf_Internal_Note *note)
10001 /* Compute offset of pr_getregsz, skipping over pr_statussz.
10002 Also compute minimum size of this note. */
10003 switch (elf_elfheader (abfd)->e_ident[EI_CLASS])
10007 min_size = offset + (4 * 2) + 4 + 4 + 4;
10011 offset = 4 + 4 + 8; /* Includes padding before pr_statussz. */
10012 min_size = offset + (8 * 2) + 4 + 4 + 4 + 4;
10019 if (note->descsz < min_size)
10022 /* Check for version 1 in pr_version. */
10023 if (bfd_h_get_32 (abfd, (bfd_byte *) note->descdata) != 1)
10026 /* Extract size of pr_reg from pr_gregsetsz. */
10027 /* Skip over pr_gregsetsz and pr_fpregsetsz. */
10028 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS32)
10030 size = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
10035 size = bfd_h_get_64 (abfd, (bfd_byte *) note->descdata + offset);
10039 /* Skip over pr_osreldate. */
10042 /* Read signal from pr_cursig. */
10043 if (elf_tdata (abfd)->core->signal == 0)
10044 elf_tdata (abfd)->core->signal
10045 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
10048 /* Read TID from pr_pid. */
10049 elf_tdata (abfd)->core->lwpid
10050 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
10053 /* Padding before pr_reg. */
10054 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS64)
10057 /* Make sure that there is enough data remaining in the note. */
10058 if ((note->descsz - offset) < size)
10061 /* Make a ".reg/999" section and a ".reg" section. */
10062 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
10063 size, note->descpos + offset);
10067 elfcore_grok_freebsd_note (bfd *abfd, Elf_Internal_Note *note)
10069 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10071 switch (note->type)
10074 if (bed->elf_backend_grok_freebsd_prstatus)
10075 if ((*bed->elf_backend_grok_freebsd_prstatus) (abfd, note))
10077 return elfcore_grok_freebsd_prstatus (abfd, note);
10080 return elfcore_grok_prfpreg (abfd, note);
10083 return elfcore_grok_freebsd_psinfo (abfd, note);
10085 case NT_FREEBSD_THRMISC:
10086 if (note->namesz == 8)
10087 return elfcore_make_note_pseudosection (abfd, ".thrmisc", note);
10091 case NT_FREEBSD_PROCSTAT_PROC:
10092 return elfcore_make_note_pseudosection (abfd, ".note.freebsdcore.proc",
10095 case NT_FREEBSD_PROCSTAT_FILES:
10096 return elfcore_make_note_pseudosection (abfd, ".note.freebsdcore.files",
10099 case NT_FREEBSD_PROCSTAT_VMMAP:
10100 return elfcore_make_note_pseudosection (abfd, ".note.freebsdcore.vmmap",
10103 case NT_FREEBSD_PROCSTAT_AUXV:
10105 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
10110 sect->size = note->descsz - 4;
10111 sect->filepos = note->descpos + 4;
10112 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
10117 case NT_X86_XSTATE:
10118 if (note->namesz == 8)
10119 return elfcore_grok_xstatereg (abfd, note);
10123 case NT_FREEBSD_PTLWPINFO:
10124 return elfcore_make_note_pseudosection (abfd, ".note.freebsdcore.lwpinfo",
10128 return elfcore_grok_arm_vfp (abfd, note);
10136 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
10140 cp = strchr (note->namedata, '@');
10143 *lwpidp = atoi(cp + 1);
10150 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
10152 if (note->descsz <= 0x7c + 31)
10155 /* Signal number at offset 0x08. */
10156 elf_tdata (abfd)->core->signal
10157 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
10159 /* Process ID at offset 0x50. */
10160 elf_tdata (abfd)->core->pid
10161 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
10163 /* Command name at 0x7c (max 32 bytes, including nul). */
10164 elf_tdata (abfd)->core->command
10165 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
10167 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
10172 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
10176 if (elfcore_netbsd_get_lwpid (note, &lwp))
10177 elf_tdata (abfd)->core->lwpid = lwp;
10179 if (note->type == NT_NETBSDCORE_PROCINFO)
10181 /* NetBSD-specific core "procinfo". Note that we expect to
10182 find this note before any of the others, which is fine,
10183 since the kernel writes this note out first when it
10184 creates a core file. */
10186 return elfcore_grok_netbsd_procinfo (abfd, note);
10189 /* As of Jan 2002 there are no other machine-independent notes
10190 defined for NetBSD core files. If the note type is less
10191 than the start of the machine-dependent note types, we don't
10194 if (note->type < NT_NETBSDCORE_FIRSTMACH)
10198 switch (bfd_get_arch (abfd))
10200 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
10201 PT_GETFPREGS == mach+2. */
10203 case bfd_arch_alpha:
10204 case bfd_arch_sparc:
10205 switch (note->type)
10207 case NT_NETBSDCORE_FIRSTMACH+0:
10208 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10210 case NT_NETBSDCORE_FIRSTMACH+2:
10211 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10217 /* On all other arch's, PT_GETREGS == mach+1 and
10218 PT_GETFPREGS == mach+3. */
10221 switch (note->type)
10223 case NT_NETBSDCORE_FIRSTMACH+1:
10224 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10226 case NT_NETBSDCORE_FIRSTMACH+3:
10227 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10237 elfcore_grok_openbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
10239 if (note->descsz <= 0x48 + 31)
10242 /* Signal number at offset 0x08. */
10243 elf_tdata (abfd)->core->signal
10244 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
10246 /* Process ID at offset 0x20. */
10247 elf_tdata (abfd)->core->pid
10248 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x20);
10250 /* Command name at 0x48 (max 32 bytes, including nul). */
10251 elf_tdata (abfd)->core->command
10252 = _bfd_elfcore_strndup (abfd, note->descdata + 0x48, 31);
10258 elfcore_grok_openbsd_note (bfd *abfd, Elf_Internal_Note *note)
10260 if (note->type == NT_OPENBSD_PROCINFO)
10261 return elfcore_grok_openbsd_procinfo (abfd, note);
10263 if (note->type == NT_OPENBSD_REGS)
10264 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10266 if (note->type == NT_OPENBSD_FPREGS)
10267 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10269 if (note->type == NT_OPENBSD_XFPREGS)
10270 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
10272 if (note->type == NT_OPENBSD_AUXV)
10274 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
10279 sect->size = note->descsz;
10280 sect->filepos = note->descpos;
10281 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
10286 if (note->type == NT_OPENBSD_WCOOKIE)
10288 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
10293 sect->size = note->descsz;
10294 sect->filepos = note->descpos;
10295 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
10304 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
10306 void *ddata = note->descdata;
10313 if (note->descsz < 16)
10316 /* nto_procfs_status 'pid' field is at offset 0. */
10317 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
10319 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
10320 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
10322 /* nto_procfs_status 'flags' field is at offset 8. */
10323 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
10325 /* nto_procfs_status 'what' field is at offset 14. */
10326 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
10328 elf_tdata (abfd)->core->signal = sig;
10329 elf_tdata (abfd)->core->lwpid = *tid;
10332 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
10333 do not come from signals so we make sure we set the current
10334 thread just in case. */
10335 if (flags & 0x00000080)
10336 elf_tdata (abfd)->core->lwpid = *tid;
10338 /* Make a ".qnx_core_status/%d" section. */
10339 sprintf (buf, ".qnx_core_status/%ld", *tid);
10341 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
10344 strcpy (name, buf);
10346 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10350 sect->size = note->descsz;
10351 sect->filepos = note->descpos;
10352 sect->alignment_power = 2;
10354 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
10358 elfcore_grok_nto_regs (bfd *abfd,
10359 Elf_Internal_Note *note,
10367 /* Make a "(base)/%d" section. */
10368 sprintf (buf, "%s/%ld", base, tid);
10370 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
10373 strcpy (name, buf);
10375 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10379 sect->size = note->descsz;
10380 sect->filepos = note->descpos;
10381 sect->alignment_power = 2;
10383 /* This is the current thread. */
10384 if (elf_tdata (abfd)->core->lwpid == tid)
10385 return elfcore_maybe_make_sect (abfd, base, sect);
10390 #define BFD_QNT_CORE_INFO 7
10391 #define BFD_QNT_CORE_STATUS 8
10392 #define BFD_QNT_CORE_GREG 9
10393 #define BFD_QNT_CORE_FPREG 10
10396 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
10398 /* Every GREG section has a STATUS section before it. Store the
10399 tid from the previous call to pass down to the next gregs
10401 static long tid = 1;
10403 switch (note->type)
10405 case BFD_QNT_CORE_INFO:
10406 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
10407 case BFD_QNT_CORE_STATUS:
10408 return elfcore_grok_nto_status (abfd, note, &tid);
10409 case BFD_QNT_CORE_GREG:
10410 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
10411 case BFD_QNT_CORE_FPREG:
10412 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
10419 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
10425 /* Use note name as section name. */
10426 len = note->namesz;
10427 name = (char *) bfd_alloc (abfd, len);
10430 memcpy (name, note->namedata, len);
10431 name[len - 1] = '\0';
10433 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10437 sect->size = note->descsz;
10438 sect->filepos = note->descpos;
10439 sect->alignment_power = 1;
10444 /* Function: elfcore_write_note
10447 buffer to hold note, and current size of buffer
10451 size of data for note
10453 Writes note to end of buffer. ELF64 notes are written exactly as
10454 for ELF32, despite the current (as of 2006) ELF gabi specifying
10455 that they ought to have 8-byte namesz and descsz field, and have
10456 8-byte alignment. Other writers, eg. Linux kernel, do the same.
10459 Pointer to realloc'd buffer, *BUFSIZ updated. */
10462 elfcore_write_note (bfd *abfd,
10470 Elf_External_Note *xnp;
10477 namesz = strlen (name) + 1;
10479 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
10481 buf = (char *) realloc (buf, *bufsiz + newspace);
10484 dest = buf + *bufsiz;
10485 *bufsiz += newspace;
10486 xnp = (Elf_External_Note *) dest;
10487 H_PUT_32 (abfd, namesz, xnp->namesz);
10488 H_PUT_32 (abfd, size, xnp->descsz);
10489 H_PUT_32 (abfd, type, xnp->type);
10493 memcpy (dest, name, namesz);
10501 memcpy (dest, input, size);
10511 #if GCC_VERSION >= 8000
10512 #pragma GCC diagnostic push
10513 #pragma GCC diagnostic ignored "-Wstringop-truncation"
10516 elfcore_write_prpsinfo (bfd *abfd,
10520 const char *psargs)
10522 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10524 if (bed->elf_backend_write_core_note != NULL)
10527 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
10528 NT_PRPSINFO, fname, psargs);
10533 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
10534 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
10535 if (bed->s->elfclass == ELFCLASS32)
10537 #if defined (HAVE_PSINFO32_T)
10539 int note_type = NT_PSINFO;
10542 int note_type = NT_PRPSINFO;
10545 memset (&data, 0, sizeof (data));
10546 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
10547 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
10548 return elfcore_write_note (abfd, buf, bufsiz,
10549 "CORE", note_type, &data, sizeof (data));
10554 #if defined (HAVE_PSINFO_T)
10556 int note_type = NT_PSINFO;
10559 int note_type = NT_PRPSINFO;
10562 memset (&data, 0, sizeof (data));
10563 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
10564 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
10565 return elfcore_write_note (abfd, buf, bufsiz,
10566 "CORE", note_type, &data, sizeof (data));
10568 #endif /* PSINFO_T or PRPSINFO_T */
10573 #if GCC_VERSION >= 8000
10574 #pragma GCC diagnostic pop
10578 elfcore_write_linux_prpsinfo32
10579 (bfd *abfd, char *buf, int *bufsiz,
10580 const struct elf_internal_linux_prpsinfo *prpsinfo)
10582 if (get_elf_backend_data (abfd)->linux_prpsinfo32_ugid16)
10584 struct elf_external_linux_prpsinfo32_ugid16 data;
10586 swap_linux_prpsinfo32_ugid16_out (abfd, prpsinfo, &data);
10587 return elfcore_write_note (abfd, buf, bufsiz, "CORE", NT_PRPSINFO,
10588 &data, sizeof (data));
10592 struct elf_external_linux_prpsinfo32_ugid32 data;
10594 swap_linux_prpsinfo32_ugid32_out (abfd, prpsinfo, &data);
10595 return elfcore_write_note (abfd, buf, bufsiz, "CORE", NT_PRPSINFO,
10596 &data, sizeof (data));
10601 elfcore_write_linux_prpsinfo64
10602 (bfd *abfd, char *buf, int *bufsiz,
10603 const struct elf_internal_linux_prpsinfo *prpsinfo)
10605 if (get_elf_backend_data (abfd)->linux_prpsinfo64_ugid16)
10607 struct elf_external_linux_prpsinfo64_ugid16 data;
10609 swap_linux_prpsinfo64_ugid16_out (abfd, prpsinfo, &data);
10610 return elfcore_write_note (abfd, buf, bufsiz,
10611 "CORE", NT_PRPSINFO, &data, sizeof (data));
10615 struct elf_external_linux_prpsinfo64_ugid32 data;
10617 swap_linux_prpsinfo64_ugid32_out (abfd, prpsinfo, &data);
10618 return elfcore_write_note (abfd, buf, bufsiz,
10619 "CORE", NT_PRPSINFO, &data, sizeof (data));
10624 elfcore_write_prstatus (bfd *abfd,
10631 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10633 if (bed->elf_backend_write_core_note != NULL)
10636 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
10638 pid, cursig, gregs);
10643 #if defined (HAVE_PRSTATUS_T)
10644 #if defined (HAVE_PRSTATUS32_T)
10645 if (bed->s->elfclass == ELFCLASS32)
10647 prstatus32_t prstat;
10649 memset (&prstat, 0, sizeof (prstat));
10650 prstat.pr_pid = pid;
10651 prstat.pr_cursig = cursig;
10652 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
10653 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
10654 NT_PRSTATUS, &prstat, sizeof (prstat));
10661 memset (&prstat, 0, sizeof (prstat));
10662 prstat.pr_pid = pid;
10663 prstat.pr_cursig = cursig;
10664 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
10665 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
10666 NT_PRSTATUS, &prstat, sizeof (prstat));
10668 #endif /* HAVE_PRSTATUS_T */
10674 #if defined (HAVE_LWPSTATUS_T)
10676 elfcore_write_lwpstatus (bfd *abfd,
10683 lwpstatus_t lwpstat;
10684 const char *note_name = "CORE";
10686 memset (&lwpstat, 0, sizeof (lwpstat));
10687 lwpstat.pr_lwpid = pid >> 16;
10688 lwpstat.pr_cursig = cursig;
10689 #if defined (HAVE_LWPSTATUS_T_PR_REG)
10690 memcpy (&lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
10691 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
10692 #if !defined(gregs)
10693 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
10694 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
10696 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
10697 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
10700 return elfcore_write_note (abfd, buf, bufsiz, note_name,
10701 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
10703 #endif /* HAVE_LWPSTATUS_T */
10705 #if defined (HAVE_PSTATUS_T)
10707 elfcore_write_pstatus (bfd *abfd,
10711 int cursig ATTRIBUTE_UNUSED,
10712 const void *gregs ATTRIBUTE_UNUSED)
10714 const char *note_name = "CORE";
10715 #if defined (HAVE_PSTATUS32_T)
10716 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10718 if (bed->s->elfclass == ELFCLASS32)
10722 memset (&pstat, 0, sizeof (pstat));
10723 pstat.pr_pid = pid & 0xffff;
10724 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
10725 NT_PSTATUS, &pstat, sizeof (pstat));
10733 memset (&pstat, 0, sizeof (pstat));
10734 pstat.pr_pid = pid & 0xffff;
10735 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
10736 NT_PSTATUS, &pstat, sizeof (pstat));
10740 #endif /* HAVE_PSTATUS_T */
10743 elfcore_write_prfpreg (bfd *abfd,
10746 const void *fpregs,
10749 const char *note_name = "CORE";
10750 return elfcore_write_note (abfd, buf, bufsiz,
10751 note_name, NT_FPREGSET, fpregs, size);
10755 elfcore_write_prxfpreg (bfd *abfd,
10758 const void *xfpregs,
10761 char *note_name = "LINUX";
10762 return elfcore_write_note (abfd, buf, bufsiz,
10763 note_name, NT_PRXFPREG, xfpregs, size);
10767 elfcore_write_xstatereg (bfd *abfd, char *buf, int *bufsiz,
10768 const void *xfpregs, int size)
10771 if (get_elf_backend_data (abfd)->elf_osabi == ELFOSABI_FREEBSD)
10772 note_name = "FreeBSD";
10774 note_name = "LINUX";
10775 return elfcore_write_note (abfd, buf, bufsiz,
10776 note_name, NT_X86_XSTATE, xfpregs, size);
10780 elfcore_write_ppc_vmx (bfd *abfd,
10783 const void *ppc_vmx,
10786 char *note_name = "LINUX";
10787 return elfcore_write_note (abfd, buf, bufsiz,
10788 note_name, NT_PPC_VMX, ppc_vmx, size);
10792 elfcore_write_ppc_vsx (bfd *abfd,
10795 const void *ppc_vsx,
10798 char *note_name = "LINUX";
10799 return elfcore_write_note (abfd, buf, bufsiz,
10800 note_name, NT_PPC_VSX, ppc_vsx, size);
10804 elfcore_write_s390_high_gprs (bfd *abfd,
10807 const void *s390_high_gprs,
10810 char *note_name = "LINUX";
10811 return elfcore_write_note (abfd, buf, bufsiz,
10812 note_name, NT_S390_HIGH_GPRS,
10813 s390_high_gprs, size);
10817 elfcore_write_s390_timer (bfd *abfd,
10820 const void *s390_timer,
10823 char *note_name = "LINUX";
10824 return elfcore_write_note (abfd, buf, bufsiz,
10825 note_name, NT_S390_TIMER, s390_timer, size);
10829 elfcore_write_s390_todcmp (bfd *abfd,
10832 const void *s390_todcmp,
10835 char *note_name = "LINUX";
10836 return elfcore_write_note (abfd, buf, bufsiz,
10837 note_name, NT_S390_TODCMP, s390_todcmp, size);
10841 elfcore_write_s390_todpreg (bfd *abfd,
10844 const void *s390_todpreg,
10847 char *note_name = "LINUX";
10848 return elfcore_write_note (abfd, buf, bufsiz,
10849 note_name, NT_S390_TODPREG, s390_todpreg, size);
10853 elfcore_write_s390_ctrs (bfd *abfd,
10856 const void *s390_ctrs,
10859 char *note_name = "LINUX";
10860 return elfcore_write_note (abfd, buf, bufsiz,
10861 note_name, NT_S390_CTRS, s390_ctrs, size);
10865 elfcore_write_s390_prefix (bfd *abfd,
10868 const void *s390_prefix,
10871 char *note_name = "LINUX";
10872 return elfcore_write_note (abfd, buf, bufsiz,
10873 note_name, NT_S390_PREFIX, s390_prefix, size);
10877 elfcore_write_s390_last_break (bfd *abfd,
10880 const void *s390_last_break,
10883 char *note_name = "LINUX";
10884 return elfcore_write_note (abfd, buf, bufsiz,
10885 note_name, NT_S390_LAST_BREAK,
10886 s390_last_break, size);
10890 elfcore_write_s390_system_call (bfd *abfd,
10893 const void *s390_system_call,
10896 char *note_name = "LINUX";
10897 return elfcore_write_note (abfd, buf, bufsiz,
10898 note_name, NT_S390_SYSTEM_CALL,
10899 s390_system_call, size);
10903 elfcore_write_s390_tdb (bfd *abfd,
10906 const void *s390_tdb,
10909 char *note_name = "LINUX";
10910 return elfcore_write_note (abfd, buf, bufsiz,
10911 note_name, NT_S390_TDB, s390_tdb, size);
10915 elfcore_write_s390_vxrs_low (bfd *abfd,
10918 const void *s390_vxrs_low,
10921 char *note_name = "LINUX";
10922 return elfcore_write_note (abfd, buf, bufsiz,
10923 note_name, NT_S390_VXRS_LOW, s390_vxrs_low, size);
10927 elfcore_write_s390_vxrs_high (bfd *abfd,
10930 const void *s390_vxrs_high,
10933 char *note_name = "LINUX";
10934 return elfcore_write_note (abfd, buf, bufsiz,
10935 note_name, NT_S390_VXRS_HIGH,
10936 s390_vxrs_high, size);
10940 elfcore_write_s390_gs_cb (bfd *abfd,
10943 const void *s390_gs_cb,
10946 char *note_name = "LINUX";
10947 return elfcore_write_note (abfd, buf, bufsiz,
10948 note_name, NT_S390_GS_CB,
10953 elfcore_write_s390_gs_bc (bfd *abfd,
10956 const void *s390_gs_bc,
10959 char *note_name = "LINUX";
10960 return elfcore_write_note (abfd, buf, bufsiz,
10961 note_name, NT_S390_GS_BC,
10966 elfcore_write_arm_vfp (bfd *abfd,
10969 const void *arm_vfp,
10972 char *note_name = "LINUX";
10973 return elfcore_write_note (abfd, buf, bufsiz,
10974 note_name, NT_ARM_VFP, arm_vfp, size);
10978 elfcore_write_aarch_tls (bfd *abfd,
10981 const void *aarch_tls,
10984 char *note_name = "LINUX";
10985 return elfcore_write_note (abfd, buf, bufsiz,
10986 note_name, NT_ARM_TLS, aarch_tls, size);
10990 elfcore_write_aarch_hw_break (bfd *abfd,
10993 const void *aarch_hw_break,
10996 char *note_name = "LINUX";
10997 return elfcore_write_note (abfd, buf, bufsiz,
10998 note_name, NT_ARM_HW_BREAK, aarch_hw_break, size);
11002 elfcore_write_aarch_hw_watch (bfd *abfd,
11005 const void *aarch_hw_watch,
11008 char *note_name = "LINUX";
11009 return elfcore_write_note (abfd, buf, bufsiz,
11010 note_name, NT_ARM_HW_WATCH, aarch_hw_watch, size);
11014 elfcore_write_register_note (bfd *abfd,
11017 const char *section,
11021 if (strcmp (section, ".reg2") == 0)
11022 return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size);
11023 if (strcmp (section, ".reg-xfp") == 0)
11024 return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
11025 if (strcmp (section, ".reg-xstate") == 0)
11026 return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size);
11027 if (strcmp (section, ".reg-ppc-vmx") == 0)
11028 return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
11029 if (strcmp (section, ".reg-ppc-vsx") == 0)
11030 return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size);
11031 if (strcmp (section, ".reg-s390-high-gprs") == 0)
11032 return elfcore_write_s390_high_gprs (abfd, buf, bufsiz, data, size);
11033 if (strcmp (section, ".reg-s390-timer") == 0)
11034 return elfcore_write_s390_timer (abfd, buf, bufsiz, data, size);
11035 if (strcmp (section, ".reg-s390-todcmp") == 0)
11036 return elfcore_write_s390_todcmp (abfd, buf, bufsiz, data, size);
11037 if (strcmp (section, ".reg-s390-todpreg") == 0)
11038 return elfcore_write_s390_todpreg (abfd, buf, bufsiz, data, size);
11039 if (strcmp (section, ".reg-s390-ctrs") == 0)
11040 return elfcore_write_s390_ctrs (abfd, buf, bufsiz, data, size);
11041 if (strcmp (section, ".reg-s390-prefix") == 0)
11042 return elfcore_write_s390_prefix (abfd, buf, bufsiz, data, size);
11043 if (strcmp (section, ".reg-s390-last-break") == 0)
11044 return elfcore_write_s390_last_break (abfd, buf, bufsiz, data, size);
11045 if (strcmp (section, ".reg-s390-system-call") == 0)
11046 return elfcore_write_s390_system_call (abfd, buf, bufsiz, data, size);
11047 if (strcmp (section, ".reg-s390-tdb") == 0)
11048 return elfcore_write_s390_tdb (abfd, buf, bufsiz, data, size);
11049 if (strcmp (section, ".reg-s390-vxrs-low") == 0)
11050 return elfcore_write_s390_vxrs_low (abfd, buf, bufsiz, data, size);
11051 if (strcmp (section, ".reg-s390-vxrs-high") == 0)
11052 return elfcore_write_s390_vxrs_high (abfd, buf, bufsiz, data, size);
11053 if (strcmp (section, ".reg-s390-gs-cb") == 0)
11054 return elfcore_write_s390_gs_cb (abfd, buf, bufsiz, data, size);
11055 if (strcmp (section, ".reg-s390-gs-bc") == 0)
11056 return elfcore_write_s390_gs_bc (abfd, buf, bufsiz, data, size);
11057 if (strcmp (section, ".reg-arm-vfp") == 0)
11058 return elfcore_write_arm_vfp (abfd, buf, bufsiz, data, size);
11059 if (strcmp (section, ".reg-aarch-tls") == 0)
11060 return elfcore_write_aarch_tls (abfd, buf, bufsiz, data, size);
11061 if (strcmp (section, ".reg-aarch-hw-break") == 0)
11062 return elfcore_write_aarch_hw_break (abfd, buf, bufsiz, data, size);
11063 if (strcmp (section, ".reg-aarch-hw-watch") == 0)
11064 return elfcore_write_aarch_hw_watch (abfd, buf, bufsiz, data, size);
11069 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset,
11074 /* NB: CORE PT_NOTE segments may have p_align values of 0 or 1.
11075 gABI specifies that PT_NOTE alignment should be aligned to 4
11076 bytes for 32-bit objects and to 8 bytes for 64-bit objects. If
11077 align is less than 4, we use 4 byte alignment. */
11080 if (align != 4 && align != 8)
11084 while (p < buf + size)
11086 Elf_External_Note *xnp = (Elf_External_Note *) p;
11087 Elf_Internal_Note in;
11089 if (offsetof (Elf_External_Note, name) > buf - p + size)
11092 in.type = H_GET_32 (abfd, xnp->type);
11094 in.namesz = H_GET_32 (abfd, xnp->namesz);
11095 in.namedata = xnp->name;
11096 if (in.namesz > buf - in.namedata + size)
11099 in.descsz = H_GET_32 (abfd, xnp->descsz);
11100 in.descdata = p + ELF_NOTE_DESC_OFFSET (in.namesz, align);
11101 in.descpos = offset + (in.descdata - buf);
11103 && (in.descdata >= buf + size
11104 || in.descsz > buf - in.descdata + size))
11107 switch (bfd_get_format (abfd))
11114 #define GROKER_ELEMENT(S,F) {S, sizeof (S) - 1, F}
11117 const char * string;
11119 bfd_boolean (* func)(bfd *, Elf_Internal_Note *);
11123 GROKER_ELEMENT ("", elfcore_grok_note),
11124 GROKER_ELEMENT ("FreeBSD", elfcore_grok_freebsd_note),
11125 GROKER_ELEMENT ("NetBSD-CORE", elfcore_grok_netbsd_note),
11126 GROKER_ELEMENT ( "OpenBSD", elfcore_grok_openbsd_note),
11127 GROKER_ELEMENT ("QNX", elfcore_grok_nto_note),
11128 GROKER_ELEMENT ("SPU/", elfcore_grok_spu_note)
11130 #undef GROKER_ELEMENT
11133 for (i = ARRAY_SIZE (grokers); i--;)
11135 if (in.namesz >= grokers[i].len
11136 && strncmp (in.namedata, grokers[i].string,
11137 grokers[i].len) == 0)
11139 if (! grokers[i].func (abfd, & in))
11148 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
11150 if (! elfobj_grok_gnu_note (abfd, &in))
11153 else if (in.namesz == sizeof "stapsdt"
11154 && strcmp (in.namedata, "stapsdt") == 0)
11156 if (! elfobj_grok_stapsdt_note (abfd, &in))
11162 p += ELF_NOTE_NEXT_OFFSET (in.namesz, in.descsz, align);
11169 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size,
11174 if (size == 0 || (size + 1) == 0)
11177 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
11180 buf = (char *) bfd_malloc (size + 1);
11184 /* PR 17512: file: ec08f814
11185 0-termintate the buffer so that string searches will not overflow. */
11188 if (bfd_bread (buf, size, abfd) != size
11189 || !elf_parse_notes (abfd, buf, size, offset, align))
11199 /* Providing external access to the ELF program header table. */
11201 /* Return an upper bound on the number of bytes required to store a
11202 copy of ABFD's program header table entries. Return -1 if an error
11203 occurs; bfd_get_error will return an appropriate code. */
11206 bfd_get_elf_phdr_upper_bound (bfd *abfd)
11208 if (abfd->xvec->flavour != bfd_target_elf_flavour)
11210 bfd_set_error (bfd_error_wrong_format);
11214 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
11217 /* Copy ABFD's program header table entries to *PHDRS. The entries
11218 will be stored as an array of Elf_Internal_Phdr structures, as
11219 defined in include/elf/internal.h. To find out how large the
11220 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
11222 Return the number of program header table entries read, or -1 if an
11223 error occurs; bfd_get_error will return an appropriate code. */
11226 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
11230 if (abfd->xvec->flavour != bfd_target_elf_flavour)
11232 bfd_set_error (bfd_error_wrong_format);
11236 num_phdrs = elf_elfheader (abfd)->e_phnum;
11237 memcpy (phdrs, elf_tdata (abfd)->phdr,
11238 num_phdrs * sizeof (Elf_Internal_Phdr));
11243 enum elf_reloc_type_class
11244 _bfd_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
11245 const asection *rel_sec ATTRIBUTE_UNUSED,
11246 const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
11248 return reloc_class_normal;
11251 /* For RELA architectures, return the relocation value for a
11252 relocation against a local symbol. */
11255 _bfd_elf_rela_local_sym (bfd *abfd,
11256 Elf_Internal_Sym *sym,
11258 Elf_Internal_Rela *rel)
11260 asection *sec = *psec;
11261 bfd_vma relocation;
11263 relocation = (sec->output_section->vma
11264 + sec->output_offset
11266 if ((sec->flags & SEC_MERGE)
11267 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
11268 && sec->sec_info_type == SEC_INFO_TYPE_MERGE)
11271 _bfd_merged_section_offset (abfd, psec,
11272 elf_section_data (sec)->sec_info,
11273 sym->st_value + rel->r_addend);
11276 /* If we have changed the section, and our original section is
11277 marked with SEC_EXCLUDE, it means that the original
11278 SEC_MERGE section has been completely subsumed in some
11279 other SEC_MERGE section. In this case, we need to leave
11280 some info around for --emit-relocs. */
11281 if ((sec->flags & SEC_EXCLUDE) != 0)
11282 sec->kept_section = *psec;
11285 rel->r_addend -= relocation;
11286 rel->r_addend += sec->output_section->vma + sec->output_offset;
11292 _bfd_elf_rel_local_sym (bfd *abfd,
11293 Elf_Internal_Sym *sym,
11297 asection *sec = *psec;
11299 if (sec->sec_info_type != SEC_INFO_TYPE_MERGE)
11300 return sym->st_value + addend;
11302 return _bfd_merged_section_offset (abfd, psec,
11303 elf_section_data (sec)->sec_info,
11304 sym->st_value + addend);
11307 /* Adjust an address within a section. Given OFFSET within SEC, return
11308 the new offset within the section, based upon changes made to the
11309 section. Returns -1 if the offset is now invalid.
11310 The offset (in abnd out) is in target sized bytes, however big a
11314 _bfd_elf_section_offset (bfd *abfd,
11315 struct bfd_link_info *info,
11319 switch (sec->sec_info_type)
11321 case SEC_INFO_TYPE_STABS:
11322 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
11324 case SEC_INFO_TYPE_EH_FRAME:
11325 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
11328 if ((sec->flags & SEC_ELF_REVERSE_COPY) != 0)
11330 /* Reverse the offset. */
11331 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
11332 bfd_size_type address_size = bed->s->arch_size / 8;
11334 /* address_size and sec->size are in octets. Convert
11335 to bytes before subtracting the original offset. */
11336 offset = (sec->size - address_size) / bfd_octets_per_byte (abfd) - offset;
11342 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
11343 reconstruct an ELF file by reading the segments out of remote memory
11344 based on the ELF file header at EHDR_VMA and the ELF program headers it
11345 points to. If not null, *LOADBASEP is filled in with the difference
11346 between the VMAs from which the segments were read, and the VMAs the
11347 file headers (and hence BFD's idea of each section's VMA) put them at.
11349 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
11350 remote memory at target address VMA into the local buffer at MYADDR; it
11351 should return zero on success or an `errno' code on failure. TEMPL must
11352 be a BFD for an ELF target with the word size and byte order found in
11353 the remote memory. */
11356 bfd_elf_bfd_from_remote_memory
11359 bfd_size_type size,
11360 bfd_vma *loadbasep,
11361 int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type))
11363 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
11364 (templ, ehdr_vma, size, loadbasep, target_read_memory);
11368 _bfd_elf_get_synthetic_symtab (bfd *abfd,
11369 long symcount ATTRIBUTE_UNUSED,
11370 asymbol **syms ATTRIBUTE_UNUSED,
11375 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
11378 const char *relplt_name;
11379 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
11383 Elf_Internal_Shdr *hdr;
11389 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
11392 if (dynsymcount <= 0)
11395 if (!bed->plt_sym_val)
11398 relplt_name = bed->relplt_name;
11399 if (relplt_name == NULL)
11400 relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt";
11401 relplt = bfd_get_section_by_name (abfd, relplt_name);
11402 if (relplt == NULL)
11405 hdr = &elf_section_data (relplt)->this_hdr;
11406 if (hdr->sh_link != elf_dynsymtab (abfd)
11407 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
11410 plt = bfd_get_section_by_name (abfd, ".plt");
11414 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
11415 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
11418 count = relplt->size / hdr->sh_entsize;
11419 size = count * sizeof (asymbol);
11420 p = relplt->relocation;
11421 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
11423 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
11424 if (p->addend != 0)
11427 size += sizeof ("+0x") - 1 + 8 + 8 * (bed->s->elfclass == ELFCLASS64);
11429 size += sizeof ("+0x") - 1 + 8;
11434 s = *ret = (asymbol *) bfd_malloc (size);
11438 names = (char *) (s + count);
11439 p = relplt->relocation;
11441 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
11446 addr = bed->plt_sym_val (i, plt, p);
11447 if (addr == (bfd_vma) -1)
11450 *s = **p->sym_ptr_ptr;
11451 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
11452 we are defining a symbol, ensure one of them is set. */
11453 if ((s->flags & BSF_LOCAL) == 0)
11454 s->flags |= BSF_GLOBAL;
11455 s->flags |= BSF_SYNTHETIC;
11457 s->value = addr - plt->vma;
11460 len = strlen ((*p->sym_ptr_ptr)->name);
11461 memcpy (names, (*p->sym_ptr_ptr)->name, len);
11463 if (p->addend != 0)
11467 memcpy (names, "+0x", sizeof ("+0x") - 1);
11468 names += sizeof ("+0x") - 1;
11469 bfd_sprintf_vma (abfd, buf, p->addend);
11470 for (a = buf; *a == '0'; ++a)
11473 memcpy (names, a, len);
11476 memcpy (names, "@plt", sizeof ("@plt"));
11477 names += sizeof ("@plt");
11484 /* It is only used by x86-64 so far.
11485 ??? This repeats *COM* id of zero. sec->id is supposed to be unique,
11486 but current usage would allow all of _bfd_std_section to be zero. */
11487 static const asymbol lcomm_sym
11488 = GLOBAL_SYM_INIT ("LARGE_COMMON", &_bfd_elf_large_com_section);
11489 asection _bfd_elf_large_com_section
11490 = BFD_FAKE_SECTION (_bfd_elf_large_com_section, &lcomm_sym,
11491 "LARGE_COMMON", 0, SEC_IS_COMMON);
11494 _bfd_elf_post_process_headers (bfd * abfd,
11495 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
11497 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
11499 i_ehdrp = elf_elfheader (abfd);
11501 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
11503 /* To make things simpler for the loader on Linux systems we set the
11504 osabi field to ELFOSABI_GNU if the binary contains symbols of
11505 the STT_GNU_IFUNC type or STB_GNU_UNIQUE binding. */
11506 if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE
11507 && elf_tdata (abfd)->has_gnu_symbols)
11508 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_GNU;
11512 /* Return TRUE for ELF symbol types that represent functions.
11513 This is the default version of this function, which is sufficient for
11514 most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */
11517 _bfd_elf_is_function_type (unsigned int type)
11519 return (type == STT_FUNC
11520 || type == STT_GNU_IFUNC);
11523 /* If the ELF symbol SYM might be a function in SEC, return the
11524 function size and set *CODE_OFF to the function's entry point,
11525 otherwise return zero. */
11528 _bfd_elf_maybe_function_sym (const asymbol *sym, asection *sec,
11531 bfd_size_type size;
11533 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
11534 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0
11535 || sym->section != sec)
11538 *code_off = sym->value;
11540 if (!(sym->flags & BSF_SYNTHETIC))
11541 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;