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 >= %Lu for section `%s'"),
359 abfd, strindex, 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: %#Lx"), abfd, shdr->sh_size);
663 bfd_set_error (bfd_error_bad_value);
668 memset (shdr->contents, 0, amt);
670 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
671 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
675 /* xgettext:c-format */
676 (_("%pB: invalid size field in group section"
677 " header: %#Lx"), abfd, shdr->sh_size);
678 bfd_set_error (bfd_error_bad_value);
680 /* PR 17510: If the group contents are even
681 partially corrupt, do not allow any of the
682 contents to be used. */
683 memset (shdr->contents, 0, amt);
687 /* Translate raw contents, a flag word followed by an
688 array of elf section indices all in target byte order,
689 to the flag word followed by an array of elf section
691 src = shdr->contents + shdr->sh_size;
692 dest = (Elf_Internal_Group *) (shdr->contents + amt);
700 idx = H_GET_32 (abfd, src);
701 if (src == shdr->contents)
704 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
705 shdr->bfd_section->flags
706 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
712 (_("%pB: invalid SHT_GROUP entry"), abfd);
715 dest->shdr = elf_elfsections (abfd)[idx];
720 /* PR 17510: Corrupt binaries might contain invalid groups. */
721 if (num_group != (unsigned) elf_tdata (abfd)->num_group)
723 elf_tdata (abfd)->num_group = num_group;
725 /* If all groups are invalid then fail. */
728 elf_tdata (abfd)->group_sect_ptr = NULL;
729 elf_tdata (abfd)->num_group = num_group = -1;
731 (_("%pB: no valid group sections found"), abfd);
732 bfd_set_error (bfd_error_bad_value);
738 if (num_group != (unsigned) -1)
740 unsigned int search_offset = elf_tdata (abfd)->group_search_offset;
743 for (j = 0; j < num_group; j++)
745 /* Begin search from previous found group. */
746 unsigned i = (j + search_offset) % num_group;
748 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
749 Elf_Internal_Group *idx;
755 idx = (Elf_Internal_Group *) shdr->contents;
756 if (idx == NULL || shdr->sh_size < 4)
758 /* See PR 21957 for a reproducer. */
759 /* xgettext:c-format */
760 _bfd_error_handler (_("%pB: group section '%pA' has no contents"),
761 abfd, shdr->bfd_section);
762 elf_tdata (abfd)->group_sect_ptr[i] = NULL;
763 bfd_set_error (bfd_error_bad_value);
766 n_elt = shdr->sh_size / 4;
768 /* Look through this group's sections to see if current
769 section is a member. */
771 if ((++idx)->shdr == hdr)
775 /* We are a member of this group. Go looking through
776 other members to see if any others are linked via
778 idx = (Elf_Internal_Group *) shdr->contents;
779 n_elt = shdr->sh_size / 4;
781 if ((s = (++idx)->shdr->bfd_section) != NULL
782 && elf_next_in_group (s) != NULL)
786 /* Snarf the group name from other member, and
787 insert current section in circular list. */
788 elf_group_name (newsect) = elf_group_name (s);
789 elf_next_in_group (newsect) = elf_next_in_group (s);
790 elf_next_in_group (s) = newsect;
796 gname = group_signature (abfd, shdr);
799 elf_group_name (newsect) = gname;
801 /* Start a circular list with one element. */
802 elf_next_in_group (newsect) = newsect;
805 /* If the group section has been created, point to the
807 if (shdr->bfd_section != NULL)
808 elf_next_in_group (shdr->bfd_section) = newsect;
810 elf_tdata (abfd)->group_search_offset = i;
817 if (elf_group_name (newsect) == NULL)
819 /* xgettext:c-format */
820 _bfd_error_handler (_("%pB: no group info for section '%pA'"),
828 _bfd_elf_setup_sections (bfd *abfd)
831 unsigned int num_group = elf_tdata (abfd)->num_group;
832 bfd_boolean result = TRUE;
835 /* Process SHF_LINK_ORDER. */
836 for (s = abfd->sections; s != NULL; s = s->next)
838 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
839 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
841 unsigned int elfsec = this_hdr->sh_link;
842 /* FIXME: The old Intel compiler and old strip/objcopy may
843 not set the sh_link or sh_info fields. Hence we could
844 get the situation where elfsec is 0. */
847 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
848 if (bed->link_order_error_handler)
849 bed->link_order_error_handler
850 /* xgettext:c-format */
851 (_("%pB: warning: sh_link not set for section `%pA'"),
856 asection *linksec = NULL;
858 if (elfsec < elf_numsections (abfd))
860 this_hdr = elf_elfsections (abfd)[elfsec];
861 linksec = this_hdr->bfd_section;
865 Some strip/objcopy may leave an incorrect value in
866 sh_link. We don't want to proceed. */
870 /* xgettext:c-format */
871 (_("%pB: sh_link [%d] in section `%pA' is incorrect"),
872 s->owner, elfsec, s);
876 elf_linked_to_section (s) = linksec;
879 else if (this_hdr->sh_type == SHT_GROUP
880 && elf_next_in_group (s) == NULL)
883 /* xgettext:c-format */
884 (_("%pB: SHT_GROUP section [index %d] has no SHF_GROUP sections"),
885 abfd, elf_section_data (s)->this_idx);
890 /* Process section groups. */
891 if (num_group == (unsigned) -1)
894 for (i = 0; i < num_group; i++)
896 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
897 Elf_Internal_Group *idx;
900 /* PR binutils/18758: Beware of corrupt binaries with invalid group data. */
901 if (shdr == NULL || shdr->bfd_section == NULL || shdr->contents == NULL)
904 /* xgettext:c-format */
905 (_("%pB: section group entry number %u is corrupt"),
911 idx = (Elf_Internal_Group *) shdr->contents;
912 n_elt = shdr->sh_size / 4;
918 if (idx->shdr == NULL)
920 else if (idx->shdr->bfd_section)
921 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
922 else if (idx->shdr->sh_type != SHT_RELA
923 && idx->shdr->sh_type != SHT_REL)
925 /* There are some unknown sections in the group. */
927 /* xgettext:c-format */
928 (_("%pB: unknown type [%#x] section `%s' in group [%pA]"),
931 bfd_elf_string_from_elf_section (abfd,
932 (elf_elfheader (abfd)
945 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
947 return elf_next_in_group (sec) != NULL;
951 convert_debug_to_zdebug (bfd *abfd, const char *name)
953 unsigned int len = strlen (name);
954 char *new_name = bfd_alloc (abfd, len + 2);
955 if (new_name == NULL)
959 memcpy (new_name + 2, name + 1, len);
964 convert_zdebug_to_debug (bfd *abfd, const char *name)
966 unsigned int len = strlen (name);
967 char *new_name = bfd_alloc (abfd, len);
968 if (new_name == NULL)
971 memcpy (new_name + 1, name + 2, len - 1);
975 /* Make a BFD section from an ELF section. We store a pointer to the
976 BFD section in the bfd_section field of the header. */
979 _bfd_elf_make_section_from_shdr (bfd *abfd,
980 Elf_Internal_Shdr *hdr,
986 const struct elf_backend_data *bed;
988 if (hdr->bfd_section != NULL)
991 newsect = bfd_make_section_anyway (abfd, name);
995 hdr->bfd_section = newsect;
996 elf_section_data (newsect)->this_hdr = *hdr;
997 elf_section_data (newsect)->this_idx = shindex;
999 /* Always use the real type/flags. */
1000 elf_section_type (newsect) = hdr->sh_type;
1001 elf_section_flags (newsect) = hdr->sh_flags;
1003 newsect->filepos = hdr->sh_offset;
1005 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
1006 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
1007 || ! bfd_set_section_alignment (abfd, newsect,
1008 bfd_log2 (hdr->sh_addralign)))
1011 flags = SEC_NO_FLAGS;
1012 if (hdr->sh_type != SHT_NOBITS)
1013 flags |= SEC_HAS_CONTENTS;
1014 if (hdr->sh_type == SHT_GROUP)
1016 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1019 if (hdr->sh_type != SHT_NOBITS)
1022 if ((hdr->sh_flags & SHF_WRITE) == 0)
1023 flags |= SEC_READONLY;
1024 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
1026 else if ((flags & SEC_LOAD) != 0)
1028 if ((hdr->sh_flags & SHF_MERGE) != 0)
1031 newsect->entsize = hdr->sh_entsize;
1033 if ((hdr->sh_flags & SHF_STRINGS) != 0)
1034 flags |= SEC_STRINGS;
1035 if (hdr->sh_flags & SHF_GROUP)
1036 if (!setup_group (abfd, hdr, newsect))
1038 if ((hdr->sh_flags & SHF_TLS) != 0)
1039 flags |= SEC_THREAD_LOCAL;
1040 if ((hdr->sh_flags & SHF_EXCLUDE) != 0)
1041 flags |= SEC_EXCLUDE;
1043 if ((flags & SEC_ALLOC) == 0)
1045 /* The debugging sections appear to be recognized only by name,
1046 not any sort of flag. Their SEC_ALLOC bits are cleared. */
1047 if (name [0] == '.')
1052 p = ".debug", n = 6;
1053 else if (name[1] == 'g' && name[2] == 'n')
1054 p = ".gnu.linkonce.wi.", n = 17;
1055 else if (name[1] == 'g' && name[2] == 'd')
1056 p = ".gdb_index", n = 11; /* yes we really do mean 11. */
1057 else if (name[1] == 'l')
1059 else if (name[1] == 's')
1061 else if (name[1] == 'z')
1062 p = ".zdebug", n = 7;
1065 if (p != NULL && strncmp (name, p, n) == 0)
1066 flags |= SEC_DEBUGGING;
1070 /* As a GNU extension, if the name begins with .gnu.linkonce, we
1071 only link a single copy of the section. This is used to support
1072 g++. g++ will emit each template expansion in its own section.
1073 The symbols will be defined as weak, so that multiple definitions
1074 are permitted. The GNU linker extension is to actually discard
1075 all but one of the sections. */
1076 if (CONST_STRNEQ (name, ".gnu.linkonce")
1077 && elf_next_in_group (newsect) == NULL)
1078 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1080 bed = get_elf_backend_data (abfd);
1081 if (bed->elf_backend_section_flags)
1082 if (! bed->elf_backend_section_flags (&flags, hdr))
1085 if (! bfd_set_section_flags (abfd, newsect, flags))
1088 /* We do not parse the PT_NOTE segments as we are interested even in the
1089 separate debug info files which may have the segments offsets corrupted.
1090 PT_NOTEs from the core files are currently not parsed using BFD. */
1091 if (hdr->sh_type == SHT_NOTE)
1095 if (!bfd_malloc_and_get_section (abfd, newsect, &contents))
1098 elf_parse_notes (abfd, (char *) contents, hdr->sh_size,
1099 hdr->sh_offset, hdr->sh_addralign);
1103 if ((flags & SEC_ALLOC) != 0)
1105 Elf_Internal_Phdr *phdr;
1106 unsigned int i, nload;
1108 /* Some ELF linkers produce binaries with all the program header
1109 p_paddr fields zero. If we have such a binary with more than
1110 one PT_LOAD header, then leave the section lma equal to vma
1111 so that we don't create sections with overlapping lma. */
1112 phdr = elf_tdata (abfd)->phdr;
1113 for (nload = 0, i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
1114 if (phdr->p_paddr != 0)
1116 else if (phdr->p_type == PT_LOAD && phdr->p_memsz != 0)
1118 if (i >= elf_elfheader (abfd)->e_phnum && nload > 1)
1121 phdr = elf_tdata (abfd)->phdr;
1122 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
1124 if (((phdr->p_type == PT_LOAD
1125 && (hdr->sh_flags & SHF_TLS) == 0)
1126 || phdr->p_type == PT_TLS)
1127 && ELF_SECTION_IN_SEGMENT (hdr, phdr))
1129 if ((flags & SEC_LOAD) == 0)
1130 newsect->lma = (phdr->p_paddr
1131 + hdr->sh_addr - phdr->p_vaddr);
1133 /* We used to use the same adjustment for SEC_LOAD
1134 sections, but that doesn't work if the segment
1135 is packed with code from multiple VMAs.
1136 Instead we calculate the section LMA based on
1137 the segment LMA. It is assumed that the
1138 segment will contain sections with contiguous
1139 LMAs, even if the VMAs are not. */
1140 newsect->lma = (phdr->p_paddr
1141 + hdr->sh_offset - phdr->p_offset);
1143 /* With contiguous segments, we can't tell from file
1144 offsets whether a section with zero size should
1145 be placed at the end of one segment or the
1146 beginning of the next. Decide based on vaddr. */
1147 if (hdr->sh_addr >= phdr->p_vaddr
1148 && (hdr->sh_addr + hdr->sh_size
1149 <= phdr->p_vaddr + phdr->p_memsz))
1155 /* Compress/decompress DWARF debug sections with names: .debug_* and
1156 .zdebug_*, after the section flags is set. */
1157 if ((flags & SEC_DEBUGGING)
1158 && ((name[1] == 'd' && name[6] == '_')
1159 || (name[1] == 'z' && name[7] == '_')))
1161 enum { nothing, compress, decompress } action = nothing;
1162 int compression_header_size;
1163 bfd_size_type uncompressed_size;
1164 bfd_boolean compressed
1165 = bfd_is_section_compressed_with_header (abfd, newsect,
1166 &compression_header_size,
1167 &uncompressed_size);
1171 /* Compressed section. Check if we should decompress. */
1172 if ((abfd->flags & BFD_DECOMPRESS))
1173 action = decompress;
1176 /* Compress the uncompressed section or convert from/to .zdebug*
1177 section. Check if we should compress. */
1178 if (action == nothing)
1180 if (newsect->size != 0
1181 && (abfd->flags & BFD_COMPRESS)
1182 && compression_header_size >= 0
1183 && uncompressed_size > 0
1185 || ((compression_header_size > 0)
1186 != ((abfd->flags & BFD_COMPRESS_GABI) != 0))))
1192 if (action == compress)
1194 if (!bfd_init_section_compress_status (abfd, newsect))
1197 /* xgettext:c-format */
1198 (_("%pB: unable to initialize compress status for section %s"),
1205 if (!bfd_init_section_decompress_status (abfd, newsect))
1208 /* xgettext:c-format */
1209 (_("%pB: unable to initialize decompress status for section %s"),
1215 if (abfd->is_linker_input)
1218 && (action == decompress
1219 || (action == compress
1220 && (abfd->flags & BFD_COMPRESS_GABI) != 0)))
1222 /* Convert section name from .zdebug_* to .debug_* so
1223 that linker will consider this section as a debug
1225 char *new_name = convert_zdebug_to_debug (abfd, name);
1226 if (new_name == NULL)
1228 bfd_rename_section (abfd, newsect, new_name);
1232 /* For objdump, don't rename the section. For objcopy, delay
1233 section rename to elf_fake_sections. */
1234 newsect->flags |= SEC_ELF_RENAME;
1240 const char *const bfd_elf_section_type_names[] =
1242 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1243 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1244 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1247 /* ELF relocs are against symbols. If we are producing relocatable
1248 output, and the reloc is against an external symbol, and nothing
1249 has given us any additional addend, the resulting reloc will also
1250 be against the same symbol. In such a case, we don't want to
1251 change anything about the way the reloc is handled, since it will
1252 all be done at final link time. Rather than put special case code
1253 into bfd_perform_relocation, all the reloc types use this howto
1254 function. It just short circuits the reloc if producing
1255 relocatable output against an external symbol. */
1257 bfd_reloc_status_type
1258 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1259 arelent *reloc_entry,
1261 void *data ATTRIBUTE_UNUSED,
1262 asection *input_section,
1264 char **error_message ATTRIBUTE_UNUSED)
1266 if (output_bfd != NULL
1267 && (symbol->flags & BSF_SECTION_SYM) == 0
1268 && (! reloc_entry->howto->partial_inplace
1269 || reloc_entry->addend == 0))
1271 reloc_entry->address += input_section->output_offset;
1272 return bfd_reloc_ok;
1275 return bfd_reloc_continue;
1278 /* Returns TRUE if section A matches section B.
1279 Names, addresses and links may be different, but everything else
1280 should be the same. */
1283 section_match (const Elf_Internal_Shdr * a,
1284 const Elf_Internal_Shdr * b)
1287 a->sh_type == b->sh_type
1288 && (a->sh_flags & ~ SHF_INFO_LINK)
1289 == (b->sh_flags & ~ SHF_INFO_LINK)
1290 && a->sh_addralign == b->sh_addralign
1291 && a->sh_size == b->sh_size
1292 && a->sh_entsize == b->sh_entsize
1293 /* FIXME: Check sh_addr ? */
1297 /* Find a section in OBFD that has the same characteristics
1298 as IHEADER. Return the index of this section or SHN_UNDEF if
1299 none can be found. Check's section HINT first, as this is likely
1300 to be the correct section. */
1303 find_link (const bfd *obfd, const Elf_Internal_Shdr *iheader,
1304 const unsigned int hint)
1306 Elf_Internal_Shdr ** oheaders = elf_elfsections (obfd);
1309 BFD_ASSERT (iheader != NULL);
1311 /* See PR 20922 for a reproducer of the NULL test. */
1312 if (hint < elf_numsections (obfd)
1313 && oheaders[hint] != NULL
1314 && section_match (oheaders[hint], iheader))
1317 for (i = 1; i < elf_numsections (obfd); i++)
1319 Elf_Internal_Shdr * oheader = oheaders[i];
1321 if (oheader == NULL)
1323 if (section_match (oheader, iheader))
1324 /* FIXME: Do we care if there is a potential for
1325 multiple matches ? */
1332 /* PR 19938: Attempt to set the ELF section header fields of an OS or
1333 Processor specific section, based upon a matching input section.
1334 Returns TRUE upon success, FALSE otherwise. */
1337 copy_special_section_fields (const bfd *ibfd,
1339 const Elf_Internal_Shdr *iheader,
1340 Elf_Internal_Shdr *oheader,
1341 const unsigned int secnum)
1343 const struct elf_backend_data *bed = get_elf_backend_data (obfd);
1344 const Elf_Internal_Shdr **iheaders = (const Elf_Internal_Shdr **) elf_elfsections (ibfd);
1345 bfd_boolean changed = FALSE;
1346 unsigned int sh_link;
1348 if (oheader->sh_type == SHT_NOBITS)
1350 /* This is a feature for objcopy --only-keep-debug:
1351 When a section's type is changed to NOBITS, we preserve
1352 the sh_link and sh_info fields so that they can be
1353 matched up with the original.
1355 Note: Strictly speaking these assignments are wrong.
1356 The sh_link and sh_info fields should point to the
1357 relevent sections in the output BFD, which may not be in
1358 the same location as they were in the input BFD. But
1359 the whole point of this action is to preserve the
1360 original values of the sh_link and sh_info fields, so
1361 that they can be matched up with the section headers in
1362 the original file. So strictly speaking we may be
1363 creating an invalid ELF file, but it is only for a file
1364 that just contains debug info and only for sections
1365 without any contents. */
1366 if (oheader->sh_link == 0)
1367 oheader->sh_link = iheader->sh_link;
1368 if (oheader->sh_info == 0)
1369 oheader->sh_info = iheader->sh_info;
1373 /* Allow the target a chance to decide how these fields should be set. */
1374 if (bed->elf_backend_copy_special_section_fields != NULL
1375 && bed->elf_backend_copy_special_section_fields
1376 (ibfd, obfd, iheader, oheader))
1379 /* We have an iheader which might match oheader, and which has non-zero
1380 sh_info and/or sh_link fields. Attempt to follow those links and find
1381 the section in the output bfd which corresponds to the linked section
1382 in the input bfd. */
1383 if (iheader->sh_link != SHN_UNDEF)
1385 /* See PR 20931 for a reproducer. */
1386 if (iheader->sh_link >= elf_numsections (ibfd))
1389 /* xgettext:c-format */
1390 (_("%pB: Invalid sh_link field (%d) in section number %d"),
1391 ibfd, iheader->sh_link, secnum);
1395 sh_link = find_link (obfd, iheaders[iheader->sh_link], iheader->sh_link);
1396 if (sh_link != SHN_UNDEF)
1398 oheader->sh_link = sh_link;
1402 /* FIXME: Should we install iheader->sh_link
1403 if we could not find a match ? */
1405 /* xgettext:c-format */
1406 (_("%pB: Failed to find link section for section %d"), obfd, secnum);
1409 if (iheader->sh_info)
1411 /* The sh_info field can hold arbitrary information, but if the
1412 SHF_LINK_INFO flag is set then it should be interpreted as a
1414 if (iheader->sh_flags & SHF_INFO_LINK)
1416 sh_link = find_link (obfd, iheaders[iheader->sh_info],
1418 if (sh_link != SHN_UNDEF)
1419 oheader->sh_flags |= SHF_INFO_LINK;
1422 /* No idea what it means - just copy it. */
1423 sh_link = iheader->sh_info;
1425 if (sh_link != SHN_UNDEF)
1427 oheader->sh_info = sh_link;
1432 /* xgettext:c-format */
1433 (_("%pB: Failed to find info section for section %d"), obfd, secnum);
1439 /* Copy the program header and other data from one object module to
1443 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1445 const Elf_Internal_Shdr **iheaders = (const Elf_Internal_Shdr **) elf_elfsections (ibfd);
1446 Elf_Internal_Shdr **oheaders = elf_elfsections (obfd);
1447 const struct elf_backend_data *bed;
1450 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1451 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1454 if (!elf_flags_init (obfd))
1456 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1457 elf_flags_init (obfd) = TRUE;
1460 elf_gp (obfd) = elf_gp (ibfd);
1462 /* Also copy the EI_OSABI field. */
1463 elf_elfheader (obfd)->e_ident[EI_OSABI] =
1464 elf_elfheader (ibfd)->e_ident[EI_OSABI];
1466 /* If set, copy the EI_ABIVERSION field. */
1467 if (elf_elfheader (ibfd)->e_ident[EI_ABIVERSION])
1468 elf_elfheader (obfd)->e_ident[EI_ABIVERSION]
1469 = elf_elfheader (ibfd)->e_ident[EI_ABIVERSION];
1471 /* Copy object attributes. */
1472 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1474 if (iheaders == NULL || oheaders == NULL)
1477 bed = get_elf_backend_data (obfd);
1479 /* Possibly copy other fields in the section header. */
1480 for (i = 1; i < elf_numsections (obfd); i++)
1483 Elf_Internal_Shdr * oheader = oheaders[i];
1485 /* Ignore ordinary sections. SHT_NOBITS sections are considered however
1486 because of a special case need for generating separate debug info
1487 files. See below for more details. */
1489 || (oheader->sh_type != SHT_NOBITS
1490 && oheader->sh_type < SHT_LOOS))
1493 /* Ignore empty sections, and sections whose
1494 fields have already been initialised. */
1495 if (oheader->sh_size == 0
1496 || (oheader->sh_info != 0 && oheader->sh_link != 0))
1499 /* Scan for the matching section in the input bfd.
1500 First we try for a direct mapping between the input and output sections. */
1501 for (j = 1; j < elf_numsections (ibfd); j++)
1503 const Elf_Internal_Shdr * iheader = iheaders[j];
1505 if (iheader == NULL)
1508 if (oheader->bfd_section != NULL
1509 && iheader->bfd_section != NULL
1510 && iheader->bfd_section->output_section != NULL
1511 && iheader->bfd_section->output_section == oheader->bfd_section)
1513 /* We have found a connection from the input section to the
1514 output section. Attempt to copy the header fields. If
1515 this fails then do not try any further sections - there
1516 should only be a one-to-one mapping between input and output. */
1517 if (! copy_special_section_fields (ibfd, obfd, iheader, oheader, i))
1518 j = elf_numsections (ibfd);
1523 if (j < elf_numsections (ibfd))
1526 /* That failed. So try to deduce the corresponding input section.
1527 Unfortunately we cannot compare names as the output string table
1528 is empty, so instead we check size, address and type. */
1529 for (j = 1; j < elf_numsections (ibfd); j++)
1531 const Elf_Internal_Shdr * iheader = iheaders[j];
1533 if (iheader == NULL)
1536 /* Try matching fields in the input section's header.
1537 Since --only-keep-debug turns all non-debug sections into
1538 SHT_NOBITS sections, the output SHT_NOBITS type matches any
1540 if ((oheader->sh_type == SHT_NOBITS
1541 || iheader->sh_type == oheader->sh_type)
1542 && (iheader->sh_flags & ~ SHF_INFO_LINK)
1543 == (oheader->sh_flags & ~ SHF_INFO_LINK)
1544 && iheader->sh_addralign == oheader->sh_addralign
1545 && iheader->sh_entsize == oheader->sh_entsize
1546 && iheader->sh_size == oheader->sh_size
1547 && iheader->sh_addr == oheader->sh_addr
1548 && (iheader->sh_info != oheader->sh_info
1549 || iheader->sh_link != oheader->sh_link))
1551 if (copy_special_section_fields (ibfd, obfd, iheader, oheader, i))
1556 if (j == elf_numsections (ibfd) && oheader->sh_type >= SHT_LOOS)
1558 /* Final attempt. Call the backend copy function
1559 with a NULL input section. */
1560 if (bed->elf_backend_copy_special_section_fields != NULL)
1561 bed->elf_backend_copy_special_section_fields (ibfd, obfd, NULL, oheader);
1569 get_segment_type (unsigned int p_type)
1574 case PT_NULL: pt = "NULL"; break;
1575 case PT_LOAD: pt = "LOAD"; break;
1576 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1577 case PT_INTERP: pt = "INTERP"; break;
1578 case PT_NOTE: pt = "NOTE"; break;
1579 case PT_SHLIB: pt = "SHLIB"; break;
1580 case PT_PHDR: pt = "PHDR"; break;
1581 case PT_TLS: pt = "TLS"; break;
1582 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1583 case PT_GNU_STACK: pt = "STACK"; break;
1584 case PT_GNU_RELRO: pt = "RELRO"; break;
1585 default: pt = NULL; break;
1590 /* Print out the program headers. */
1593 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1595 FILE *f = (FILE *) farg;
1596 Elf_Internal_Phdr *p;
1598 bfd_byte *dynbuf = NULL;
1600 p = elf_tdata (abfd)->phdr;
1605 fprintf (f, _("\nProgram Header:\n"));
1606 c = elf_elfheader (abfd)->e_phnum;
1607 for (i = 0; i < c; i++, p++)
1609 const char *pt = get_segment_type (p->p_type);
1614 sprintf (buf, "0x%lx", p->p_type);
1617 fprintf (f, "%8s off 0x", pt);
1618 bfd_fprintf_vma (abfd, f, p->p_offset);
1619 fprintf (f, " vaddr 0x");
1620 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1621 fprintf (f, " paddr 0x");
1622 bfd_fprintf_vma (abfd, f, p->p_paddr);
1623 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1624 fprintf (f, " filesz 0x");
1625 bfd_fprintf_vma (abfd, f, p->p_filesz);
1626 fprintf (f, " memsz 0x");
1627 bfd_fprintf_vma (abfd, f, p->p_memsz);
1628 fprintf (f, " flags %c%c%c",
1629 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1630 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1631 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1632 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1633 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1638 s = bfd_get_section_by_name (abfd, ".dynamic");
1641 unsigned int elfsec;
1642 unsigned long shlink;
1643 bfd_byte *extdyn, *extdynend;
1645 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1647 fprintf (f, _("\nDynamic Section:\n"));
1649 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1652 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1653 if (elfsec == SHN_BAD)
1655 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1657 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1658 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1661 /* PR 17512: file: 6f427532. */
1662 if (s->size < extdynsize)
1664 extdynend = extdyn + s->size;
1665 /* PR 17512: file: id:000006,sig:06,src:000000,op:flip4,pos:5664.
1667 for (; extdyn <= (extdynend - extdynsize); extdyn += extdynsize)
1669 Elf_Internal_Dyn dyn;
1670 const char *name = "";
1672 bfd_boolean stringp;
1673 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1675 (*swap_dyn_in) (abfd, extdyn, &dyn);
1677 if (dyn.d_tag == DT_NULL)
1684 if (bed->elf_backend_get_target_dtag)
1685 name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag);
1687 if (!strcmp (name, ""))
1689 sprintf (ab, "%#" BFD_VMA_FMT "x", dyn.d_tag);
1694 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1695 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1696 case DT_PLTGOT: name = "PLTGOT"; break;
1697 case DT_HASH: name = "HASH"; break;
1698 case DT_STRTAB: name = "STRTAB"; break;
1699 case DT_SYMTAB: name = "SYMTAB"; break;
1700 case DT_RELA: name = "RELA"; break;
1701 case DT_RELASZ: name = "RELASZ"; break;
1702 case DT_RELAENT: name = "RELAENT"; break;
1703 case DT_STRSZ: name = "STRSZ"; break;
1704 case DT_SYMENT: name = "SYMENT"; break;
1705 case DT_INIT: name = "INIT"; break;
1706 case DT_FINI: name = "FINI"; break;
1707 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1708 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1709 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1710 case DT_REL: name = "REL"; break;
1711 case DT_RELSZ: name = "RELSZ"; break;
1712 case DT_RELENT: name = "RELENT"; break;
1713 case DT_PLTREL: name = "PLTREL"; break;
1714 case DT_DEBUG: name = "DEBUG"; break;
1715 case DT_TEXTREL: name = "TEXTREL"; break;
1716 case DT_JMPREL: name = "JMPREL"; break;
1717 case DT_BIND_NOW: name = "BIND_NOW"; break;
1718 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1719 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1720 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1721 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1722 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1723 case DT_FLAGS: name = "FLAGS"; break;
1724 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1725 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1726 case DT_CHECKSUM: name = "CHECKSUM"; break;
1727 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1728 case DT_MOVEENT: name = "MOVEENT"; break;
1729 case DT_MOVESZ: name = "MOVESZ"; break;
1730 case DT_FEATURE: name = "FEATURE"; break;
1731 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1732 case DT_SYMINSZ: name = "SYMINSZ"; break;
1733 case DT_SYMINENT: name = "SYMINENT"; break;
1734 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1735 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1736 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1737 case DT_PLTPAD: name = "PLTPAD"; break;
1738 case DT_MOVETAB: name = "MOVETAB"; break;
1739 case DT_SYMINFO: name = "SYMINFO"; break;
1740 case DT_RELACOUNT: name = "RELACOUNT"; break;
1741 case DT_RELCOUNT: name = "RELCOUNT"; break;
1742 case DT_FLAGS_1: name = "FLAGS_1"; break;
1743 case DT_VERSYM: name = "VERSYM"; break;
1744 case DT_VERDEF: name = "VERDEF"; break;
1745 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1746 case DT_VERNEED: name = "VERNEED"; break;
1747 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1748 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1749 case DT_USED: name = "USED"; break;
1750 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1751 case DT_GNU_HASH: name = "GNU_HASH"; break;
1754 fprintf (f, " %-20s ", name);
1758 bfd_fprintf_vma (abfd, f, dyn.d_un.d_val);
1763 unsigned int tagv = dyn.d_un.d_val;
1765 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1768 fprintf (f, "%s", string);
1777 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1778 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1780 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1784 if (elf_dynverdef (abfd) != 0)
1786 Elf_Internal_Verdef *t;
1788 fprintf (f, _("\nVersion definitions:\n"));
1789 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1791 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1792 t->vd_flags, t->vd_hash,
1793 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1794 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1796 Elf_Internal_Verdaux *a;
1799 for (a = t->vd_auxptr->vda_nextptr;
1803 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1809 if (elf_dynverref (abfd) != 0)
1811 Elf_Internal_Verneed *t;
1813 fprintf (f, _("\nVersion References:\n"));
1814 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1816 Elf_Internal_Vernaux *a;
1818 fprintf (f, _(" required from %s:\n"),
1819 t->vn_filename ? t->vn_filename : "<corrupt>");
1820 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1821 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1822 a->vna_flags, a->vna_other,
1823 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1835 /* Get version string. */
1838 _bfd_elf_get_symbol_version_string (bfd *abfd, asymbol *symbol,
1839 bfd_boolean *hidden)
1841 const char *version_string = NULL;
1842 if (elf_dynversym (abfd) != 0
1843 && (elf_dynverdef (abfd) != 0 || elf_dynverref (abfd) != 0))
1845 unsigned int vernum = ((elf_symbol_type *) symbol)->version;
1847 *hidden = (vernum & VERSYM_HIDDEN) != 0;
1848 vernum &= VERSYM_VERSION;
1851 version_string = "";
1852 else if (vernum == 1)
1853 version_string = "Base";
1854 else if (vernum <= elf_tdata (abfd)->cverdefs)
1856 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1859 Elf_Internal_Verneed *t;
1861 version_string = "";
1862 for (t = elf_tdata (abfd)->verref;
1866 Elf_Internal_Vernaux *a;
1868 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1870 if (a->vna_other == vernum)
1872 version_string = a->vna_nodename;
1879 return version_string;
1882 /* Display ELF-specific fields of a symbol. */
1885 bfd_elf_print_symbol (bfd *abfd,
1888 bfd_print_symbol_type how)
1890 FILE *file = (FILE *) filep;
1893 case bfd_print_symbol_name:
1894 fprintf (file, "%s", symbol->name);
1896 case bfd_print_symbol_more:
1897 fprintf (file, "elf ");
1898 bfd_fprintf_vma (abfd, file, symbol->value);
1899 fprintf (file, " %x", symbol->flags);
1901 case bfd_print_symbol_all:
1903 const char *section_name;
1904 const char *name = NULL;
1905 const struct elf_backend_data *bed;
1906 unsigned char st_other;
1908 const char *version_string;
1911 section_name = symbol->section ? symbol->section->name : "(*none*)";
1913 bed = get_elf_backend_data (abfd);
1914 if (bed->elf_backend_print_symbol_all)
1915 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1919 name = symbol->name;
1920 bfd_print_symbol_vandf (abfd, file, symbol);
1923 fprintf (file, " %s\t", section_name);
1924 /* Print the "other" value for a symbol. For common symbols,
1925 we've already printed the size; now print the alignment.
1926 For other symbols, we have no specified alignment, and
1927 we've printed the address; now print the size. */
1928 if (symbol->section && bfd_is_com_section (symbol->section))
1929 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1931 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1932 bfd_fprintf_vma (abfd, file, val);
1934 /* If we have version information, print it. */
1935 version_string = _bfd_elf_get_symbol_version_string (abfd,
1941 fprintf (file, " %-11s", version_string);
1946 fprintf (file, " (%s)", version_string);
1947 for (i = 10 - strlen (version_string); i > 0; --i)
1952 /* If the st_other field is not zero, print it. */
1953 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1958 case STV_INTERNAL: fprintf (file, " .internal"); break;
1959 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1960 case STV_PROTECTED: fprintf (file, " .protected"); break;
1962 /* Some other non-defined flags are also present, so print
1964 fprintf (file, " 0x%02x", (unsigned int) st_other);
1967 fprintf (file, " %s", name);
1973 /* ELF .o/exec file reading */
1975 /* Create a new bfd section from an ELF section header. */
1978 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1980 Elf_Internal_Shdr *hdr;
1981 Elf_Internal_Ehdr *ehdr;
1982 const struct elf_backend_data *bed;
1984 bfd_boolean ret = TRUE;
1985 static bfd_boolean * sections_being_created = NULL;
1986 static bfd * sections_being_created_abfd = NULL;
1987 static unsigned int nesting = 0;
1989 if (shindex >= elf_numsections (abfd))
1994 /* PR17512: A corrupt ELF binary might contain a recursive group of
1995 sections, with each the string indicies pointing to the next in the
1996 loop. Detect this here, by refusing to load a section that we are
1997 already in the process of loading. We only trigger this test if
1998 we have nested at least three sections deep as normal ELF binaries
1999 can expect to recurse at least once.
2001 FIXME: It would be better if this array was attached to the bfd,
2002 rather than being held in a static pointer. */
2004 if (sections_being_created_abfd != abfd)
2005 sections_being_created = NULL;
2006 if (sections_being_created == NULL)
2008 /* FIXME: It would be more efficient to attach this array to the bfd somehow. */
2009 sections_being_created = (bfd_boolean *)
2010 bfd_zalloc (abfd, elf_numsections (abfd) * sizeof (bfd_boolean));
2011 sections_being_created_abfd = abfd;
2013 if (sections_being_created [shindex])
2016 (_("%pB: warning: loop in section dependencies detected"), abfd);
2019 sections_being_created [shindex] = TRUE;
2022 hdr = elf_elfsections (abfd)[shindex];
2023 ehdr = elf_elfheader (abfd);
2024 name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx,
2029 bed = get_elf_backend_data (abfd);
2030 switch (hdr->sh_type)
2033 /* Inactive section. Throw it away. */
2036 case SHT_PROGBITS: /* Normal section with contents. */
2037 case SHT_NOBITS: /* .bss section. */
2038 case SHT_HASH: /* .hash section. */
2039 case SHT_NOTE: /* .note section. */
2040 case SHT_INIT_ARRAY: /* .init_array section. */
2041 case SHT_FINI_ARRAY: /* .fini_array section. */
2042 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
2043 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
2044 case SHT_GNU_HASH: /* .gnu.hash section. */
2045 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2048 case SHT_DYNAMIC: /* Dynamic linking information. */
2049 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2052 if (hdr->sh_link > elf_numsections (abfd))
2054 /* PR 10478: Accept Solaris binaries with a sh_link
2055 field set to SHN_BEFORE or SHN_AFTER. */
2056 switch (bfd_get_arch (abfd))
2059 case bfd_arch_sparc:
2060 if (hdr->sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
2061 || hdr->sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
2063 /* Otherwise fall through. */
2068 else if (elf_elfsections (abfd)[hdr->sh_link] == NULL)
2070 else if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
2072 Elf_Internal_Shdr *dynsymhdr;
2074 /* The shared libraries distributed with hpux11 have a bogus
2075 sh_link field for the ".dynamic" section. Find the
2076 string table for the ".dynsym" section instead. */
2077 if (elf_dynsymtab (abfd) != 0)
2079 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
2080 hdr->sh_link = dynsymhdr->sh_link;
2084 unsigned int i, num_sec;
2086 num_sec = elf_numsections (abfd);
2087 for (i = 1; i < num_sec; i++)
2089 dynsymhdr = elf_elfsections (abfd)[i];
2090 if (dynsymhdr->sh_type == SHT_DYNSYM)
2092 hdr->sh_link = dynsymhdr->sh_link;
2100 case SHT_SYMTAB: /* A symbol table. */
2101 if (elf_onesymtab (abfd) == shindex)
2104 if (hdr->sh_entsize != bed->s->sizeof_sym)
2107 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
2109 if (hdr->sh_size != 0)
2111 /* Some assemblers erroneously set sh_info to one with a
2112 zero sh_size. ld sees this as a global symbol count
2113 of (unsigned) -1. Fix it here. */
2118 /* PR 18854: A binary might contain more than one symbol table.
2119 Unusual, but possible. Warn, but continue. */
2120 if (elf_onesymtab (abfd) != 0)
2123 /* xgettext:c-format */
2124 (_("%pB: warning: multiple symbol tables detected"
2125 " - ignoring the table in section %u"),
2129 elf_onesymtab (abfd) = shindex;
2130 elf_symtab_hdr (abfd) = *hdr;
2131 elf_elfsections (abfd)[shindex] = hdr = & elf_symtab_hdr (abfd);
2132 abfd->flags |= HAS_SYMS;
2134 /* Sometimes a shared object will map in the symbol table. If
2135 SHF_ALLOC is set, and this is a shared object, then we also
2136 treat this section as a BFD section. We can not base the
2137 decision purely on SHF_ALLOC, because that flag is sometimes
2138 set in a relocatable object file, which would confuse the
2140 if ((hdr->sh_flags & SHF_ALLOC) != 0
2141 && (abfd->flags & DYNAMIC) != 0
2142 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2146 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
2147 can't read symbols without that section loaded as well. It
2148 is most likely specified by the next section header. */
2150 elf_section_list * entry;
2151 unsigned int i, num_sec;
2153 for (entry = elf_symtab_shndx_list (abfd); entry != NULL; entry = entry->next)
2154 if (entry->hdr.sh_link == shindex)
2157 num_sec = elf_numsections (abfd);
2158 for (i = shindex + 1; i < num_sec; i++)
2160 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2162 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
2163 && hdr2->sh_link == shindex)
2168 for (i = 1; i < shindex; i++)
2170 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2172 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
2173 && hdr2->sh_link == shindex)
2178 ret = bfd_section_from_shdr (abfd, i);
2179 /* else FIXME: we have failed to find the symbol table - should we issue an error ? */
2183 case SHT_DYNSYM: /* A dynamic symbol table. */
2184 if (elf_dynsymtab (abfd) == shindex)
2187 if (hdr->sh_entsize != bed->s->sizeof_sym)
2190 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
2192 if (hdr->sh_size != 0)
2195 /* Some linkers erroneously set sh_info to one with a
2196 zero sh_size. ld sees this as a global symbol count
2197 of (unsigned) -1. Fix it here. */
2202 /* PR 18854: A binary might contain more than one dynamic symbol table.
2203 Unusual, but possible. Warn, but continue. */
2204 if (elf_dynsymtab (abfd) != 0)
2207 /* xgettext:c-format */
2208 (_("%pB: warning: multiple dynamic symbol tables detected"
2209 " - ignoring the table in section %u"),
2213 elf_dynsymtab (abfd) = shindex;
2214 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
2215 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
2216 abfd->flags |= HAS_SYMS;
2218 /* Besides being a symbol table, we also treat this as a regular
2219 section, so that objcopy can handle it. */
2220 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2223 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections. */
2225 elf_section_list * entry;
2227 for (entry = elf_symtab_shndx_list (abfd); entry != NULL; entry = entry->next)
2228 if (entry->ndx == shindex)
2231 entry = bfd_alloc (abfd, sizeof * entry);
2234 entry->ndx = shindex;
2236 entry->next = elf_symtab_shndx_list (abfd);
2237 elf_symtab_shndx_list (abfd) = entry;
2238 elf_elfsections (abfd)[shindex] = & entry->hdr;
2242 case SHT_STRTAB: /* A string table. */
2243 if (hdr->bfd_section != NULL)
2246 if (ehdr->e_shstrndx == shindex)
2248 elf_tdata (abfd)->shstrtab_hdr = *hdr;
2249 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
2253 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
2256 elf_tdata (abfd)->strtab_hdr = *hdr;
2257 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
2261 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
2264 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
2265 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
2266 elf_elfsections (abfd)[shindex] = hdr;
2267 /* We also treat this as a regular section, so that objcopy
2269 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2274 /* If the string table isn't one of the above, then treat it as a
2275 regular section. We need to scan all the headers to be sure,
2276 just in case this strtab section appeared before the above. */
2277 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
2279 unsigned int i, num_sec;
2281 num_sec = elf_numsections (abfd);
2282 for (i = 1; i < num_sec; i++)
2284 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2285 if (hdr2->sh_link == shindex)
2287 /* Prevent endless recursion on broken objects. */
2290 if (! bfd_section_from_shdr (abfd, i))
2292 if (elf_onesymtab (abfd) == i)
2294 if (elf_dynsymtab (abfd) == i)
2295 goto dynsymtab_strtab;
2299 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2304 /* *These* do a lot of work -- but build no sections! */
2306 asection *target_sect;
2307 Elf_Internal_Shdr *hdr2, **p_hdr;
2308 unsigned int num_sec = elf_numsections (abfd);
2309 struct bfd_elf_section_data *esdt;
2312 != (bfd_size_type) (hdr->sh_type == SHT_REL
2313 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
2316 /* Check for a bogus link to avoid crashing. */
2317 if (hdr->sh_link >= num_sec)
2320 /* xgettext:c-format */
2321 (_("%pB: invalid link %u for reloc section %s (index %u)"),
2322 abfd, hdr->sh_link, name, shindex);
2323 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2328 /* For some incomprehensible reason Oracle distributes
2329 libraries for Solaris in which some of the objects have
2330 bogus sh_link fields. It would be nice if we could just
2331 reject them, but, unfortunately, some people need to use
2332 them. We scan through the section headers; if we find only
2333 one suitable symbol table, we clobber the sh_link to point
2334 to it. I hope this doesn't break anything.
2336 Don't do it on executable nor shared library. */
2337 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0
2338 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
2339 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
2345 for (scan = 1; scan < num_sec; scan++)
2347 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
2348 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
2359 hdr->sh_link = found;
2362 /* Get the symbol table. */
2363 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
2364 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
2365 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
2368 /* If this reloc section does not use the main symbol table we
2369 don't treat it as a reloc section. BFD can't adequately
2370 represent such a section, so at least for now, we don't
2371 try. We just present it as a normal section. We also
2372 can't use it as a reloc section if it points to the null
2373 section, an invalid section, another reloc section, or its
2374 sh_link points to the null section. */
2375 if (hdr->sh_link != elf_onesymtab (abfd)
2376 || hdr->sh_link == SHN_UNDEF
2377 || hdr->sh_info == SHN_UNDEF
2378 || hdr->sh_info >= num_sec
2379 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
2380 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
2382 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2387 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
2390 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
2391 if (target_sect == NULL)
2394 esdt = elf_section_data (target_sect);
2395 if (hdr->sh_type == SHT_RELA)
2396 p_hdr = &esdt->rela.hdr;
2398 p_hdr = &esdt->rel.hdr;
2400 /* PR 17512: file: 0b4f81b7. */
2403 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2));
2408 elf_elfsections (abfd)[shindex] = hdr2;
2409 target_sect->reloc_count += (NUM_SHDR_ENTRIES (hdr)
2410 * bed->s->int_rels_per_ext_rel);
2411 target_sect->flags |= SEC_RELOC;
2412 target_sect->relocation = NULL;
2413 target_sect->rel_filepos = hdr->sh_offset;
2414 /* In the section to which the relocations apply, mark whether
2415 its relocations are of the REL or RELA variety. */
2416 if (hdr->sh_size != 0)
2418 if (hdr->sh_type == SHT_RELA)
2419 target_sect->use_rela_p = 1;
2421 abfd->flags |= HAS_RELOC;
2425 case SHT_GNU_verdef:
2426 elf_dynverdef (abfd) = shindex;
2427 elf_tdata (abfd)->dynverdef_hdr = *hdr;
2428 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2431 case SHT_GNU_versym:
2432 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
2435 elf_dynversym (abfd) = shindex;
2436 elf_tdata (abfd)->dynversym_hdr = *hdr;
2437 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2440 case SHT_GNU_verneed:
2441 elf_dynverref (abfd) = shindex;
2442 elf_tdata (abfd)->dynverref_hdr = *hdr;
2443 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2450 if (! IS_VALID_GROUP_SECTION_HEADER (hdr, GRP_ENTRY_SIZE))
2453 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2459 /* Possibly an attributes section. */
2460 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
2461 || hdr->sh_type == bed->obj_attrs_section_type)
2463 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2465 _bfd_elf_parse_attributes (abfd, hdr);
2469 /* Check for any processor-specific section types. */
2470 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
2473 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
2475 if ((hdr->sh_flags & SHF_ALLOC) != 0)
2476 /* FIXME: How to properly handle allocated section reserved
2477 for applications? */
2479 /* xgettext:c-format */
2480 (_("%pB: unknown type [%#x] section `%s'"),
2481 abfd, hdr->sh_type, name);
2484 /* Allow sections reserved for applications. */
2485 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2490 else if (hdr->sh_type >= SHT_LOPROC
2491 && hdr->sh_type <= SHT_HIPROC)
2492 /* FIXME: We should handle this section. */
2494 /* xgettext:c-format */
2495 (_("%pB: unknown type [%#x] section `%s'"),
2496 abfd, hdr->sh_type, name);
2497 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
2499 /* Unrecognised OS-specific sections. */
2500 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
2501 /* SHF_OS_NONCONFORMING indicates that special knowledge is
2502 required to correctly process the section and the file should
2503 be rejected with an error message. */
2505 /* xgettext:c-format */
2506 (_("%pB: unknown type [%#x] section `%s'"),
2507 abfd, hdr->sh_type, name);
2510 /* Otherwise it should be processed. */
2511 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2516 /* FIXME: We should handle this section. */
2518 /* xgettext:c-format */
2519 (_("%pB: unknown type [%#x] section `%s'"),
2520 abfd, hdr->sh_type, name);
2528 if (sections_being_created && sections_being_created_abfd == abfd)
2529 sections_being_created [shindex] = FALSE;
2530 if (-- nesting == 0)
2532 sections_being_created = NULL;
2533 sections_being_created_abfd = abfd;
2538 /* Return the local symbol specified by ABFD, R_SYMNDX. */
2541 bfd_sym_from_r_symndx (struct sym_cache *cache,
2543 unsigned long r_symndx)
2545 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2547 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
2549 Elf_Internal_Shdr *symtab_hdr;
2550 unsigned char esym[sizeof (Elf64_External_Sym)];
2551 Elf_External_Sym_Shndx eshndx;
2553 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2554 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2555 &cache->sym[ent], esym, &eshndx) == NULL)
2558 if (cache->abfd != abfd)
2560 memset (cache->indx, -1, sizeof (cache->indx));
2563 cache->indx[ent] = r_symndx;
2566 return &cache->sym[ent];
2569 /* Given an ELF section number, retrieve the corresponding BFD
2573 bfd_section_from_elf_index (bfd *abfd, unsigned int sec_index)
2575 if (sec_index >= elf_numsections (abfd))
2577 return elf_elfsections (abfd)[sec_index]->bfd_section;
2580 static const struct bfd_elf_special_section special_sections_b[] =
2582 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2583 { NULL, 0, 0, 0, 0 }
2586 static const struct bfd_elf_special_section special_sections_c[] =
2588 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
2589 { NULL, 0, 0, 0, 0 }
2592 static const struct bfd_elf_special_section special_sections_d[] =
2594 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2595 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2596 /* There are more DWARF sections than these, but they needn't be added here
2597 unless you have to cope with broken compilers that don't emit section
2598 attributes or you want to help the user writing assembler. */
2599 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
2600 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
2601 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
2602 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
2603 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
2604 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
2605 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
2606 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
2607 { NULL, 0, 0, 0, 0 }
2610 static const struct bfd_elf_special_section special_sections_f[] =
2612 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2613 { STRING_COMMA_LEN (".fini_array"), -2, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2614 { NULL, 0 , 0, 0, 0 }
2617 static const struct bfd_elf_special_section special_sections_g[] =
2619 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2620 { STRING_COMMA_LEN (".gnu.lto_"), -1, SHT_PROGBITS, SHF_EXCLUDE },
2621 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2622 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2623 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2624 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2625 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2626 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2627 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2628 { NULL, 0, 0, 0, 0 }
2631 static const struct bfd_elf_special_section special_sections_h[] =
2633 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2634 { NULL, 0, 0, 0, 0 }
2637 static const struct bfd_elf_special_section special_sections_i[] =
2639 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2640 { STRING_COMMA_LEN (".init_array"), -2, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2641 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2642 { NULL, 0, 0, 0, 0 }
2645 static const struct bfd_elf_special_section special_sections_l[] =
2647 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2648 { NULL, 0, 0, 0, 0 }
2651 static const struct bfd_elf_special_section special_sections_n[] =
2653 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2654 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2655 { NULL, 0, 0, 0, 0 }
2658 static const struct bfd_elf_special_section special_sections_p[] =
2660 { STRING_COMMA_LEN (".preinit_array"), -2, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2661 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2662 { NULL, 0, 0, 0, 0 }
2665 static const struct bfd_elf_special_section special_sections_r[] =
2667 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2668 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2669 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2670 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2671 { NULL, 0, 0, 0, 0 }
2674 static const struct bfd_elf_special_section special_sections_s[] =
2676 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2677 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2678 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2679 /* See struct bfd_elf_special_section declaration for the semantics of
2680 this special case where .prefix_length != strlen (.prefix). */
2681 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2682 { NULL, 0, 0, 0, 0 }
2685 static const struct bfd_elf_special_section special_sections_t[] =
2687 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2688 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2689 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2690 { NULL, 0, 0, 0, 0 }
2693 static const struct bfd_elf_special_section special_sections_z[] =
2695 { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 },
2696 { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 },
2697 { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 },
2698 { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 },
2699 { NULL, 0, 0, 0, 0 }
2702 static const struct bfd_elf_special_section * const special_sections[] =
2704 special_sections_b, /* 'b' */
2705 special_sections_c, /* 'c' */
2706 special_sections_d, /* 'd' */
2708 special_sections_f, /* 'f' */
2709 special_sections_g, /* 'g' */
2710 special_sections_h, /* 'h' */
2711 special_sections_i, /* 'i' */
2714 special_sections_l, /* 'l' */
2716 special_sections_n, /* 'n' */
2718 special_sections_p, /* 'p' */
2720 special_sections_r, /* 'r' */
2721 special_sections_s, /* 's' */
2722 special_sections_t, /* 't' */
2728 special_sections_z /* 'z' */
2731 const struct bfd_elf_special_section *
2732 _bfd_elf_get_special_section (const char *name,
2733 const struct bfd_elf_special_section *spec,
2739 len = strlen (name);
2741 for (i = 0; spec[i].prefix != NULL; i++)
2744 int prefix_len = spec[i].prefix_length;
2746 if (len < prefix_len)
2748 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2751 suffix_len = spec[i].suffix_length;
2752 if (suffix_len <= 0)
2754 if (name[prefix_len] != 0)
2756 if (suffix_len == 0)
2758 if (name[prefix_len] != '.'
2759 && (suffix_len == -2
2760 || (rela && spec[i].type == SHT_REL)))
2766 if (len < prefix_len + suffix_len)
2768 if (memcmp (name + len - suffix_len,
2769 spec[i].prefix + prefix_len,
2779 const struct bfd_elf_special_section *
2780 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2783 const struct bfd_elf_special_section *spec;
2784 const struct elf_backend_data *bed;
2786 /* See if this is one of the special sections. */
2787 if (sec->name == NULL)
2790 bed = get_elf_backend_data (abfd);
2791 spec = bed->special_sections;
2794 spec = _bfd_elf_get_special_section (sec->name,
2795 bed->special_sections,
2801 if (sec->name[0] != '.')
2804 i = sec->name[1] - 'b';
2805 if (i < 0 || i > 'z' - 'b')
2808 spec = special_sections[i];
2813 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2817 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2819 struct bfd_elf_section_data *sdata;
2820 const struct elf_backend_data *bed;
2821 const struct bfd_elf_special_section *ssect;
2823 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2826 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd,
2830 sec->used_by_bfd = sdata;
2833 /* Indicate whether or not this section should use RELA relocations. */
2834 bed = get_elf_backend_data (abfd);
2835 sec->use_rela_p = bed->default_use_rela_p;
2837 /* When we read a file, we don't need to set ELF section type and
2838 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2839 anyway. We will set ELF section type and flags for all linker
2840 created sections. If user specifies BFD section flags, we will
2841 set ELF section type and flags based on BFD section flags in
2842 elf_fake_sections. Special handling for .init_array/.fini_array
2843 output sections since they may contain .ctors/.dtors input
2844 sections. We don't want _bfd_elf_init_private_section_data to
2845 copy ELF section type from .ctors/.dtors input sections. */
2846 if (abfd->direction != read_direction
2847 || (sec->flags & SEC_LINKER_CREATED) != 0)
2849 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2852 || (sec->flags & SEC_LINKER_CREATED) != 0
2853 || ssect->type == SHT_INIT_ARRAY
2854 || ssect->type == SHT_FINI_ARRAY))
2856 elf_section_type (sec) = ssect->type;
2857 elf_section_flags (sec) = ssect->attr;
2861 return _bfd_generic_new_section_hook (abfd, sec);
2864 /* Create a new bfd section from an ELF program header.
2866 Since program segments have no names, we generate a synthetic name
2867 of the form segment<NUM>, where NUM is generally the index in the
2868 program header table. For segments that are split (see below) we
2869 generate the names segment<NUM>a and segment<NUM>b.
2871 Note that some program segments may have a file size that is different than
2872 (less than) the memory size. All this means is that at execution the
2873 system must allocate the amount of memory specified by the memory size,
2874 but only initialize it with the first "file size" bytes read from the
2875 file. This would occur for example, with program segments consisting
2876 of combined data+bss.
2878 To handle the above situation, this routine generates TWO bfd sections
2879 for the single program segment. The first has the length specified by
2880 the file size of the segment, and the second has the length specified
2881 by the difference between the two sizes. In effect, the segment is split
2882 into its initialized and uninitialized parts.
2887 _bfd_elf_make_section_from_phdr (bfd *abfd,
2888 Elf_Internal_Phdr *hdr,
2890 const char *type_name)
2898 split = ((hdr->p_memsz > 0)
2899 && (hdr->p_filesz > 0)
2900 && (hdr->p_memsz > hdr->p_filesz));
2902 if (hdr->p_filesz > 0)
2904 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "a" : "");
2905 len = strlen (namebuf) + 1;
2906 name = (char *) bfd_alloc (abfd, len);
2909 memcpy (name, namebuf, len);
2910 newsect = bfd_make_section (abfd, name);
2911 if (newsect == NULL)
2913 newsect->vma = hdr->p_vaddr;
2914 newsect->lma = hdr->p_paddr;
2915 newsect->size = hdr->p_filesz;
2916 newsect->filepos = hdr->p_offset;
2917 newsect->flags |= SEC_HAS_CONTENTS;
2918 newsect->alignment_power = bfd_log2 (hdr->p_align);
2919 if (hdr->p_type == PT_LOAD)
2921 newsect->flags |= SEC_ALLOC;
2922 newsect->flags |= SEC_LOAD;
2923 if (hdr->p_flags & PF_X)
2925 /* FIXME: all we known is that it has execute PERMISSION,
2927 newsect->flags |= SEC_CODE;
2930 if (!(hdr->p_flags & PF_W))
2932 newsect->flags |= SEC_READONLY;
2936 if (hdr->p_memsz > hdr->p_filesz)
2940 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "b" : "");
2941 len = strlen (namebuf) + 1;
2942 name = (char *) bfd_alloc (abfd, len);
2945 memcpy (name, namebuf, len);
2946 newsect = bfd_make_section (abfd, name);
2947 if (newsect == NULL)
2949 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2950 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2951 newsect->size = hdr->p_memsz - hdr->p_filesz;
2952 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2953 align = newsect->vma & -newsect->vma;
2954 if (align == 0 || align > hdr->p_align)
2955 align = hdr->p_align;
2956 newsect->alignment_power = bfd_log2 (align);
2957 if (hdr->p_type == PT_LOAD)
2959 /* Hack for gdb. Segments that have not been modified do
2960 not have their contents written to a core file, on the
2961 assumption that a debugger can find the contents in the
2962 executable. We flag this case by setting the fake
2963 section size to zero. Note that "real" bss sections will
2964 always have their contents dumped to the core file. */
2965 if (bfd_get_format (abfd) == bfd_core)
2967 newsect->flags |= SEC_ALLOC;
2968 if (hdr->p_flags & PF_X)
2969 newsect->flags |= SEC_CODE;
2971 if (!(hdr->p_flags & PF_W))
2972 newsect->flags |= SEC_READONLY;
2979 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int hdr_index)
2981 const struct elf_backend_data *bed;
2983 switch (hdr->p_type)
2986 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "null");
2989 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "load");
2992 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "dynamic");
2995 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "interp");
2998 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "note"))
3000 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz,
3006 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "shlib");
3009 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "phdr");
3011 case PT_GNU_EH_FRAME:
3012 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index,
3016 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "stack");
3019 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "relro");
3022 /* Check for any processor-specific program segment types. */
3023 bed = get_elf_backend_data (abfd);
3024 return bed->elf_backend_section_from_phdr (abfd, hdr, hdr_index, "proc");
3028 /* Return the REL_HDR for SEC, assuming there is only a single one, either
3032 _bfd_elf_single_rel_hdr (asection *sec)
3034 if (elf_section_data (sec)->rel.hdr)
3036 BFD_ASSERT (elf_section_data (sec)->rela.hdr == NULL);
3037 return elf_section_data (sec)->rel.hdr;
3040 return elf_section_data (sec)->rela.hdr;
3044 _bfd_elf_set_reloc_sh_name (bfd *abfd,
3045 Elf_Internal_Shdr *rel_hdr,
3046 const char *sec_name,
3047 bfd_boolean use_rela_p)
3049 char *name = (char *) bfd_alloc (abfd,
3050 sizeof ".rela" + strlen (sec_name));
3054 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", sec_name);
3056 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
3058 if (rel_hdr->sh_name == (unsigned int) -1)
3064 /* Allocate and initialize a section-header for a new reloc section,
3065 containing relocations against ASECT. It is stored in RELDATA. If
3066 USE_RELA_P is TRUE, we use RELA relocations; otherwise, we use REL
3070 _bfd_elf_init_reloc_shdr (bfd *abfd,
3071 struct bfd_elf_section_reloc_data *reldata,
3072 const char *sec_name,
3073 bfd_boolean use_rela_p,
3074 bfd_boolean delay_st_name_p)
3076 Elf_Internal_Shdr *rel_hdr;
3077 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3079 BFD_ASSERT (reldata->hdr == NULL);
3080 rel_hdr = bfd_zalloc (abfd, sizeof (*rel_hdr));
3081 reldata->hdr = rel_hdr;
3083 if (delay_st_name_p)
3084 rel_hdr->sh_name = (unsigned int) -1;
3085 else if (!_bfd_elf_set_reloc_sh_name (abfd, rel_hdr, sec_name,
3088 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
3089 rel_hdr->sh_entsize = (use_rela_p
3090 ? bed->s->sizeof_rela
3091 : bed->s->sizeof_rel);
3092 rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
3093 rel_hdr->sh_flags = 0;
3094 rel_hdr->sh_addr = 0;
3095 rel_hdr->sh_size = 0;
3096 rel_hdr->sh_offset = 0;
3101 /* Return the default section type based on the passed in section flags. */
3104 bfd_elf_get_default_section_type (flagword flags)
3106 if ((flags & SEC_ALLOC) != 0
3107 && (flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
3109 return SHT_PROGBITS;
3112 struct fake_section_arg
3114 struct bfd_link_info *link_info;
3118 /* Set up an ELF internal section header for a section. */
3121 elf_fake_sections (bfd *abfd, asection *asect, void *fsarg)
3123 struct fake_section_arg *arg = (struct fake_section_arg *)fsarg;
3124 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3125 struct bfd_elf_section_data *esd = elf_section_data (asect);
3126 Elf_Internal_Shdr *this_hdr;
3127 unsigned int sh_type;
3128 const char *name = asect->name;
3129 bfd_boolean delay_st_name_p = FALSE;
3133 /* We already failed; just get out of the bfd_map_over_sections
3138 this_hdr = &esd->this_hdr;
3142 /* ld: compress DWARF debug sections with names: .debug_*. */
3143 if ((arg->link_info->compress_debug & COMPRESS_DEBUG)
3144 && (asect->flags & SEC_DEBUGGING)
3148 /* Set SEC_ELF_COMPRESS to indicate this section should be
3150 asect->flags |= SEC_ELF_COMPRESS;
3152 /* If this section will be compressed, delay adding section
3153 name to section name section after it is compressed in
3154 _bfd_elf_assign_file_positions_for_non_load. */
3155 delay_st_name_p = TRUE;
3158 else if ((asect->flags & SEC_ELF_RENAME))
3160 /* objcopy: rename output DWARF debug section. */
3161 if ((abfd->flags & (BFD_DECOMPRESS | BFD_COMPRESS_GABI)))
3163 /* When we decompress or compress with SHF_COMPRESSED,
3164 convert section name from .zdebug_* to .debug_* if
3168 char *new_name = convert_zdebug_to_debug (abfd, name);
3169 if (new_name == NULL)
3177 else if (asect->compress_status == COMPRESS_SECTION_DONE)
3179 /* PR binutils/18087: Compression does not always make a
3180 section smaller. So only rename the section when
3181 compression has actually taken place. If input section
3182 name is .zdebug_*, we should never compress it again. */
3183 char *new_name = convert_debug_to_zdebug (abfd, name);
3184 if (new_name == NULL)
3189 BFD_ASSERT (name[1] != 'z');
3194 if (delay_st_name_p)
3195 this_hdr->sh_name = (unsigned int) -1;
3199 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3201 if (this_hdr->sh_name == (unsigned int) -1)
3208 /* Don't clear sh_flags. Assembler may set additional bits. */
3210 if ((asect->flags & SEC_ALLOC) != 0
3211 || asect->user_set_vma)
3212 this_hdr->sh_addr = asect->vma;
3214 this_hdr->sh_addr = 0;
3216 this_hdr->sh_offset = 0;
3217 this_hdr->sh_size = asect->size;
3218 this_hdr->sh_link = 0;
3219 /* PR 17512: file: 0eb809fe, 8b0535ee. */
3220 if (asect->alignment_power >= (sizeof (bfd_vma) * 8) - 1)
3223 /* xgettext:c-format */
3224 (_("%pB: error: Alignment power %d of section `%pA' is too big"),
3225 abfd, asect->alignment_power, asect);
3229 this_hdr->sh_addralign = (bfd_vma) 1 << asect->alignment_power;
3230 /* The sh_entsize and sh_info fields may have been set already by
3231 copy_private_section_data. */
3233 this_hdr->bfd_section = asect;
3234 this_hdr->contents = NULL;
3236 /* If the section type is unspecified, we set it based on
3238 if ((asect->flags & SEC_GROUP) != 0)
3239 sh_type = SHT_GROUP;
3241 sh_type = bfd_elf_get_default_section_type (asect->flags);
3243 if (this_hdr->sh_type == SHT_NULL)
3244 this_hdr->sh_type = sh_type;
3245 else if (this_hdr->sh_type == SHT_NOBITS
3246 && sh_type == SHT_PROGBITS
3247 && (asect->flags & SEC_ALLOC) != 0)
3249 /* Warn if we are changing a NOBITS section to PROGBITS, but
3250 allow the link to proceed. This can happen when users link
3251 non-bss input sections to bss output sections, or emit data
3252 to a bss output section via a linker script. */
3254 (_("warning: section `%pA' type changed to PROGBITS"), asect);
3255 this_hdr->sh_type = sh_type;
3258 switch (this_hdr->sh_type)
3269 case SHT_INIT_ARRAY:
3270 case SHT_FINI_ARRAY:
3271 case SHT_PREINIT_ARRAY:
3272 this_hdr->sh_entsize = bed->s->arch_size / 8;
3276 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
3280 this_hdr->sh_entsize = bed->s->sizeof_sym;
3284 this_hdr->sh_entsize = bed->s->sizeof_dyn;
3288 if (get_elf_backend_data (abfd)->may_use_rela_p)
3289 this_hdr->sh_entsize = bed->s->sizeof_rela;
3293 if (get_elf_backend_data (abfd)->may_use_rel_p)
3294 this_hdr->sh_entsize = bed->s->sizeof_rel;
3297 case SHT_GNU_versym:
3298 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
3301 case SHT_GNU_verdef:
3302 this_hdr->sh_entsize = 0;
3303 /* objcopy or strip will copy over sh_info, but may not set
3304 cverdefs. The linker will set cverdefs, but sh_info will be
3306 if (this_hdr->sh_info == 0)
3307 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
3309 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
3310 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
3313 case SHT_GNU_verneed:
3314 this_hdr->sh_entsize = 0;
3315 /* objcopy or strip will copy over sh_info, but may not set
3316 cverrefs. The linker will set cverrefs, but sh_info will be
3318 if (this_hdr->sh_info == 0)
3319 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
3321 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
3322 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
3326 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
3330 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
3334 if ((asect->flags & SEC_ALLOC) != 0)
3335 this_hdr->sh_flags |= SHF_ALLOC;
3336 if ((asect->flags & SEC_READONLY) == 0)
3337 this_hdr->sh_flags |= SHF_WRITE;
3338 if ((asect->flags & SEC_CODE) != 0)
3339 this_hdr->sh_flags |= SHF_EXECINSTR;
3340 if ((asect->flags & SEC_MERGE) != 0)
3342 this_hdr->sh_flags |= SHF_MERGE;
3343 this_hdr->sh_entsize = asect->entsize;
3345 if ((asect->flags & SEC_STRINGS) != 0)
3346 this_hdr->sh_flags |= SHF_STRINGS;
3347 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
3348 this_hdr->sh_flags |= SHF_GROUP;
3349 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
3351 this_hdr->sh_flags |= SHF_TLS;
3352 if (asect->size == 0
3353 && (asect->flags & SEC_HAS_CONTENTS) == 0)
3355 struct bfd_link_order *o = asect->map_tail.link_order;
3357 this_hdr->sh_size = 0;
3360 this_hdr->sh_size = o->offset + o->size;
3361 if (this_hdr->sh_size != 0)
3362 this_hdr->sh_type = SHT_NOBITS;
3366 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
3367 this_hdr->sh_flags |= SHF_EXCLUDE;
3369 /* If the section has relocs, set up a section header for the
3370 SHT_REL[A] section. If two relocation sections are required for
3371 this section, it is up to the processor-specific back-end to
3372 create the other. */
3373 if ((asect->flags & SEC_RELOC) != 0)
3375 /* When doing a relocatable link, create both REL and RELA sections if
3378 /* Do the normal setup if we wouldn't create any sections here. */
3379 && esd->rel.count + esd->rela.count > 0
3380 && (bfd_link_relocatable (arg->link_info)
3381 || arg->link_info->emitrelocations))
3383 if (esd->rel.count && esd->rel.hdr == NULL
3384 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rel, name,
3385 FALSE, delay_st_name_p))
3390 if (esd->rela.count && esd->rela.hdr == NULL
3391 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rela, name,
3392 TRUE, delay_st_name_p))
3398 else if (!_bfd_elf_init_reloc_shdr (abfd,
3400 ? &esd->rela : &esd->rel),
3410 /* Check for processor-specific section types. */
3411 sh_type = this_hdr->sh_type;
3412 if (bed->elf_backend_fake_sections
3413 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
3419 if (sh_type == SHT_NOBITS && asect->size != 0)
3421 /* Don't change the header type from NOBITS if we are being
3422 called for objcopy --only-keep-debug. */
3423 this_hdr->sh_type = sh_type;
3427 /* Fill in the contents of a SHT_GROUP section. Called from
3428 _bfd_elf_compute_section_file_positions for gas, objcopy, and
3429 when ELF targets use the generic linker, ld. Called for ld -r
3430 from bfd_elf_final_link. */
3433 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
3435 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
3436 asection *elt, *first;
3440 /* Ignore linker created group section. See elfNN_ia64_object_p in
3442 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
3446 if (elf_section_data (sec)->this_hdr.sh_info == 0)
3448 unsigned long symindx = 0;
3450 /* elf_group_id will have been set up by objcopy and the
3452 if (elf_group_id (sec) != NULL)
3453 symindx = elf_group_id (sec)->udata.i;
3457 /* If called from the assembler, swap_out_syms will have set up
3458 elf_section_syms. */
3459 BFD_ASSERT (elf_section_syms (abfd) != NULL);
3460 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
3462 elf_section_data (sec)->this_hdr.sh_info = symindx;
3464 else if (elf_section_data (sec)->this_hdr.sh_info == (unsigned int) -2)
3466 /* The ELF backend linker sets sh_info to -2 when the group
3467 signature symbol is global, and thus the index can't be
3468 set until all local symbols are output. */
3470 struct bfd_elf_section_data *sec_data;
3471 unsigned long symndx;
3472 unsigned long extsymoff;
3473 struct elf_link_hash_entry *h;
3475 /* The point of this little dance to the first SHF_GROUP section
3476 then back to the SHT_GROUP section is that this gets us to
3477 the SHT_GROUP in the input object. */
3478 igroup = elf_sec_group (elf_next_in_group (sec));
3479 sec_data = elf_section_data (igroup);
3480 symndx = sec_data->this_hdr.sh_info;
3482 if (!elf_bad_symtab (igroup->owner))
3484 Elf_Internal_Shdr *symtab_hdr;
3486 symtab_hdr = &elf_tdata (igroup->owner)->symtab_hdr;
3487 extsymoff = symtab_hdr->sh_info;
3489 h = elf_sym_hashes (igroup->owner)[symndx - extsymoff];
3490 while (h->root.type == bfd_link_hash_indirect
3491 || h->root.type == bfd_link_hash_warning)
3492 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3494 elf_section_data (sec)->this_hdr.sh_info = h->indx;
3497 /* The contents won't be allocated for "ld -r" or objcopy. */
3499 if (sec->contents == NULL)
3502 sec->contents = (unsigned char *) bfd_alloc (abfd, sec->size);
3504 /* Arrange for the section to be written out. */
3505 elf_section_data (sec)->this_hdr.contents = sec->contents;
3506 if (sec->contents == NULL)
3513 loc = sec->contents + sec->size;
3515 /* Get the pointer to the first section in the group that gas
3516 squirreled away here. objcopy arranges for this to be set to the
3517 start of the input section group. */
3518 first = elt = elf_next_in_group (sec);
3520 /* First element is a flag word. Rest of section is elf section
3521 indices for all the sections of the group. Write them backwards
3522 just to keep the group in the same order as given in .section
3523 directives, not that it matters. */
3530 s = s->output_section;
3532 && !bfd_is_abs_section (s))
3534 struct bfd_elf_section_data *elf_sec = elf_section_data (s);
3535 struct bfd_elf_section_data *input_elf_sec = elf_section_data (elt);
3537 if (elf_sec->rel.hdr != NULL
3539 || (input_elf_sec->rel.hdr != NULL
3540 && input_elf_sec->rel.hdr->sh_flags & SHF_GROUP) != 0))
3542 elf_sec->rel.hdr->sh_flags |= SHF_GROUP;
3544 H_PUT_32 (abfd, elf_sec->rel.idx, loc);
3546 if (elf_sec->rela.hdr != NULL
3548 || (input_elf_sec->rela.hdr != NULL
3549 && input_elf_sec->rela.hdr->sh_flags & SHF_GROUP) != 0))
3551 elf_sec->rela.hdr->sh_flags |= SHF_GROUP;
3553 H_PUT_32 (abfd, elf_sec->rela.idx, loc);
3556 H_PUT_32 (abfd, elf_sec->this_idx, loc);
3558 elt = elf_next_in_group (elt);
3564 BFD_ASSERT (loc == sec->contents);
3566 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
3569 /* Given NAME, the name of a relocation section stripped of its
3570 .rel/.rela prefix, return the section in ABFD to which the
3571 relocations apply. */
3574 _bfd_elf_plt_get_reloc_section (bfd *abfd, const char *name)
3576 /* If a target needs .got.plt section, relocations in rela.plt/rel.plt
3577 section likely apply to .got.plt or .got section. */
3578 if (get_elf_backend_data (abfd)->want_got_plt
3579 && strcmp (name, ".plt") == 0)
3584 sec = bfd_get_section_by_name (abfd, name);
3590 return bfd_get_section_by_name (abfd, name);
3593 /* Return the section to which RELOC_SEC applies. */
3596 elf_get_reloc_section (asection *reloc_sec)
3601 const struct elf_backend_data *bed;
3603 type = elf_section_data (reloc_sec)->this_hdr.sh_type;
3604 if (type != SHT_REL && type != SHT_RELA)
3607 /* We look up the section the relocs apply to by name. */
3608 name = reloc_sec->name;
3609 if (strncmp (name, ".rel", 4) != 0)
3612 if (type == SHT_RELA && *name++ != 'a')
3615 abfd = reloc_sec->owner;
3616 bed = get_elf_backend_data (abfd);
3617 return bed->get_reloc_section (abfd, name);
3620 /* Assign all ELF section numbers. The dummy first section is handled here
3621 too. The link/info pointers for the standard section types are filled
3622 in here too, while we're at it. */
3625 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
3627 struct elf_obj_tdata *t = elf_tdata (abfd);
3629 unsigned int section_number;
3630 Elf_Internal_Shdr **i_shdrp;
3631 struct bfd_elf_section_data *d;
3632 bfd_boolean need_symtab;
3636 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
3638 /* SHT_GROUP sections are in relocatable files only. */
3639 if (link_info == NULL || !link_info->resolve_section_groups)
3641 size_t reloc_count = 0;
3643 /* Put SHT_GROUP sections first. */
3644 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3646 d = elf_section_data (sec);
3648 if (d->this_hdr.sh_type == SHT_GROUP)
3650 if (sec->flags & SEC_LINKER_CREATED)
3652 /* Remove the linker created SHT_GROUP sections. */
3653 bfd_section_list_remove (abfd, sec);
3654 abfd->section_count--;
3657 d->this_idx = section_number++;
3660 /* Count relocations. */
3661 reloc_count += sec->reloc_count;
3664 /* Clear HAS_RELOC if there are no relocations. */
3665 if (reloc_count == 0)
3666 abfd->flags &= ~HAS_RELOC;
3669 for (sec = abfd->sections; sec; sec = sec->next)
3671 d = elf_section_data (sec);
3673 if (d->this_hdr.sh_type != SHT_GROUP)
3674 d->this_idx = section_number++;
3675 if (d->this_hdr.sh_name != (unsigned int) -1)
3676 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
3679 d->rel.idx = section_number++;
3680 if (d->rel.hdr->sh_name != (unsigned int) -1)
3681 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel.hdr->sh_name);
3688 d->rela.idx = section_number++;
3689 if (d->rela.hdr->sh_name != (unsigned int) -1)
3690 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rela.hdr->sh_name);
3696 need_symtab = (bfd_get_symcount (abfd) > 0
3697 || (link_info == NULL
3698 && ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3702 elf_onesymtab (abfd) = section_number++;
3703 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
3704 if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
3706 elf_section_list * entry;
3708 BFD_ASSERT (elf_symtab_shndx_list (abfd) == NULL);
3710 entry = bfd_zalloc (abfd, sizeof * entry);
3711 entry->ndx = section_number++;
3712 elf_symtab_shndx_list (abfd) = entry;
3714 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3715 ".symtab_shndx", FALSE);
3716 if (entry->hdr.sh_name == (unsigned int) -1)
3719 elf_strtab_sec (abfd) = section_number++;
3720 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
3723 elf_shstrtab_sec (abfd) = section_number++;
3724 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
3725 elf_elfheader (abfd)->e_shstrndx = elf_shstrtab_sec (abfd);
3727 if (section_number >= SHN_LORESERVE)
3729 /* xgettext:c-format */
3730 _bfd_error_handler (_("%pB: too many sections: %u"),
3731 abfd, section_number);
3735 elf_numsections (abfd) = section_number;
3736 elf_elfheader (abfd)->e_shnum = section_number;
3738 /* Set up the list of section header pointers, in agreement with the
3740 i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc2 (abfd, section_number,
3741 sizeof (Elf_Internal_Shdr *));
3742 if (i_shdrp == NULL)
3745 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd,
3746 sizeof (Elf_Internal_Shdr));
3747 if (i_shdrp[0] == NULL)
3749 bfd_release (abfd, i_shdrp);
3753 elf_elfsections (abfd) = i_shdrp;
3755 i_shdrp[elf_shstrtab_sec (abfd)] = &t->shstrtab_hdr;
3758 i_shdrp[elf_onesymtab (abfd)] = &t->symtab_hdr;
3759 if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF))
3761 elf_section_list * entry = elf_symtab_shndx_list (abfd);
3762 BFD_ASSERT (entry != NULL);
3763 i_shdrp[entry->ndx] = & entry->hdr;
3764 entry->hdr.sh_link = elf_onesymtab (abfd);
3766 i_shdrp[elf_strtab_sec (abfd)] = &t->strtab_hdr;
3767 t->symtab_hdr.sh_link = elf_strtab_sec (abfd);
3770 for (sec = abfd->sections; sec; sec = sec->next)
3774 d = elf_section_data (sec);
3776 i_shdrp[d->this_idx] = &d->this_hdr;
3777 if (d->rel.idx != 0)
3778 i_shdrp[d->rel.idx] = d->rel.hdr;
3779 if (d->rela.idx != 0)
3780 i_shdrp[d->rela.idx] = d->rela.hdr;
3782 /* Fill in the sh_link and sh_info fields while we're at it. */
3784 /* sh_link of a reloc section is the section index of the symbol
3785 table. sh_info is the section index of the section to which
3786 the relocation entries apply. */
3787 if (d->rel.idx != 0)
3789 d->rel.hdr->sh_link = elf_onesymtab (abfd);
3790 d->rel.hdr->sh_info = d->this_idx;
3791 d->rel.hdr->sh_flags |= SHF_INFO_LINK;
3793 if (d->rela.idx != 0)
3795 d->rela.hdr->sh_link = elf_onesymtab (abfd);
3796 d->rela.hdr->sh_info = d->this_idx;
3797 d->rela.hdr->sh_flags |= SHF_INFO_LINK;
3800 /* We need to set up sh_link for SHF_LINK_ORDER. */
3801 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3803 s = elf_linked_to_section (sec);
3806 /* elf_linked_to_section points to the input section. */
3807 if (link_info != NULL)
3809 /* Check discarded linkonce section. */
3810 if (discarded_section (s))
3814 /* xgettext:c-format */
3815 (_("%pB: sh_link of section `%pA' points to"
3816 " discarded section `%pA' of `%pB'"),
3817 abfd, d->this_hdr.bfd_section,
3819 /* Point to the kept section if it has the same
3820 size as the discarded one. */
3821 kept = _bfd_elf_check_kept_section (s, link_info);
3824 bfd_set_error (bfd_error_bad_value);
3830 s = s->output_section;
3831 BFD_ASSERT (s != NULL);
3835 /* Handle objcopy. */
3836 if (s->output_section == NULL)
3839 /* xgettext:c-format */
3840 (_("%pB: sh_link of section `%pA' points to"
3841 " removed section `%pA' of `%pB'"),
3842 abfd, d->this_hdr.bfd_section, s, s->owner);
3843 bfd_set_error (bfd_error_bad_value);
3846 s = s->output_section;
3848 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3853 The Intel C compiler generates SHT_IA_64_UNWIND with
3854 SHF_LINK_ORDER. But it doesn't set the sh_link or
3855 sh_info fields. Hence we could get the situation
3857 const struct elf_backend_data *bed
3858 = get_elf_backend_data (abfd);
3859 if (bed->link_order_error_handler)
3860 bed->link_order_error_handler
3861 /* xgettext:c-format */
3862 (_("%pB: warning: sh_link not set for section `%pA'"),
3867 switch (d->this_hdr.sh_type)
3871 /* A reloc section which we are treating as a normal BFD
3872 section. sh_link is the section index of the symbol
3873 table. sh_info is the section index of the section to
3874 which the relocation entries apply. We assume that an
3875 allocated reloc section uses the dynamic symbol table.
3876 FIXME: How can we be sure? */
3877 s = bfd_get_section_by_name (abfd, ".dynsym");
3879 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3881 s = elf_get_reloc_section (sec);
3884 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3885 d->this_hdr.sh_flags |= SHF_INFO_LINK;
3890 /* We assume that a section named .stab*str is a stabs
3891 string section. We look for a section with the same name
3892 but without the trailing ``str'', and set its sh_link
3893 field to point to this section. */
3894 if (CONST_STRNEQ (sec->name, ".stab")
3895 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3900 len = strlen (sec->name);
3901 alc = (char *) bfd_malloc (len - 2);
3904 memcpy (alc, sec->name, len - 3);
3905 alc[len - 3] = '\0';
3906 s = bfd_get_section_by_name (abfd, alc);
3910 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3912 /* This is a .stab section. */
3913 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3914 elf_section_data (s)->this_hdr.sh_entsize
3915 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3922 case SHT_GNU_verneed:
3923 case SHT_GNU_verdef:
3924 /* sh_link is the section header index of the string table
3925 used for the dynamic entries, or the symbol table, or the
3927 s = bfd_get_section_by_name (abfd, ".dynstr");
3929 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3932 case SHT_GNU_LIBLIST:
3933 /* sh_link is the section header index of the prelink library
3934 list used for the dynamic entries, or the symbol table, or
3935 the version strings. */
3936 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3937 ? ".dynstr" : ".gnu.libstr");
3939 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3944 case SHT_GNU_versym:
3945 /* sh_link is the section header index of the symbol table
3946 this hash table or version table is for. */
3947 s = bfd_get_section_by_name (abfd, ".dynsym");
3949 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3953 d->this_hdr.sh_link = elf_onesymtab (abfd);
3957 /* Delay setting sh_name to _bfd_elf_write_object_contents so that
3958 _bfd_elf_assign_file_positions_for_non_load can convert DWARF
3959 debug section name from .debug_* to .zdebug_* if needed. */
3965 sym_is_global (bfd *abfd, asymbol *sym)
3967 /* If the backend has a special mapping, use it. */
3968 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3969 if (bed->elf_backend_sym_is_global)
3970 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3972 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_GNU_UNIQUE)) != 0
3973 || bfd_is_und_section (bfd_get_section (sym))
3974 || bfd_is_com_section (bfd_get_section (sym)));
3977 /* Filter global symbols of ABFD to include in the import library. All
3978 SYMCOUNT symbols of ABFD can be examined from their pointers in
3979 SYMS. Pointers of symbols to keep should be stored contiguously at
3980 the beginning of that array.
3982 Returns the number of symbols to keep. */
3985 _bfd_elf_filter_global_symbols (bfd *abfd, struct bfd_link_info *info,
3986 asymbol **syms, long symcount)
3988 long src_count, dst_count = 0;
3990 for (src_count = 0; src_count < symcount; src_count++)
3992 asymbol *sym = syms[src_count];
3993 char *name = (char *) bfd_asymbol_name (sym);
3994 struct bfd_link_hash_entry *h;
3996 if (!sym_is_global (abfd, sym))
3999 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, FALSE);
4002 if (h->type != bfd_link_hash_defined && h->type != bfd_link_hash_defweak)
4004 if (h->linker_def || h->ldscript_def)
4007 syms[dst_count++] = sym;
4010 syms[dst_count] = NULL;
4015 /* Don't output section symbols for sections that are not going to be
4016 output, that are duplicates or there is no BFD section. */
4019 ignore_section_sym (bfd *abfd, asymbol *sym)
4021 elf_symbol_type *type_ptr;
4023 if ((sym->flags & BSF_SECTION_SYM) == 0)
4026 type_ptr = elf_symbol_from (abfd, sym);
4027 return ((type_ptr != NULL
4028 && type_ptr->internal_elf_sym.st_shndx != 0
4029 && bfd_is_abs_section (sym->section))
4030 || !(sym->section->owner == abfd
4031 || (sym->section->output_section->owner == abfd
4032 && sym->section->output_offset == 0)
4033 || bfd_is_abs_section (sym->section)));
4036 /* Map symbol from it's internal number to the external number, moving
4037 all local symbols to be at the head of the list. */
4040 elf_map_symbols (bfd *abfd, unsigned int *pnum_locals)
4042 unsigned int symcount = bfd_get_symcount (abfd);
4043 asymbol **syms = bfd_get_outsymbols (abfd);
4044 asymbol **sect_syms;
4045 unsigned int num_locals = 0;
4046 unsigned int num_globals = 0;
4047 unsigned int num_locals2 = 0;
4048 unsigned int num_globals2 = 0;
4049 unsigned int max_index = 0;
4055 fprintf (stderr, "elf_map_symbols\n");
4059 for (asect = abfd->sections; asect; asect = asect->next)
4061 if (max_index < asect->index)
4062 max_index = asect->index;
4066 sect_syms = (asymbol **) bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
4067 if (sect_syms == NULL)
4069 elf_section_syms (abfd) = sect_syms;
4070 elf_num_section_syms (abfd) = max_index;
4072 /* Init sect_syms entries for any section symbols we have already
4073 decided to output. */
4074 for (idx = 0; idx < symcount; idx++)
4076 asymbol *sym = syms[idx];
4078 if ((sym->flags & BSF_SECTION_SYM) != 0
4080 && !ignore_section_sym (abfd, sym)
4081 && !bfd_is_abs_section (sym->section))
4083 asection *sec = sym->section;
4085 if (sec->owner != abfd)
4086 sec = sec->output_section;
4088 sect_syms[sec->index] = syms[idx];
4092 /* Classify all of the symbols. */
4093 for (idx = 0; idx < symcount; idx++)
4095 if (sym_is_global (abfd, syms[idx]))
4097 else if (!ignore_section_sym (abfd, syms[idx]))
4101 /* We will be adding a section symbol for each normal BFD section. Most
4102 sections will already have a section symbol in outsymbols, but
4103 eg. SHT_GROUP sections will not, and we need the section symbol mapped
4104 at least in that case. */
4105 for (asect = abfd->sections; asect; asect = asect->next)
4107 if (sect_syms[asect->index] == NULL)
4109 if (!sym_is_global (abfd, asect->symbol))
4116 /* Now sort the symbols so the local symbols are first. */
4117 new_syms = (asymbol **) bfd_alloc2 (abfd, num_locals + num_globals,
4118 sizeof (asymbol *));
4120 if (new_syms == NULL)
4123 for (idx = 0; idx < symcount; idx++)
4125 asymbol *sym = syms[idx];
4128 if (sym_is_global (abfd, sym))
4129 i = num_locals + num_globals2++;
4130 else if (!ignore_section_sym (abfd, sym))
4135 sym->udata.i = i + 1;
4137 for (asect = abfd->sections; asect; asect = asect->next)
4139 if (sect_syms[asect->index] == NULL)
4141 asymbol *sym = asect->symbol;
4144 sect_syms[asect->index] = sym;
4145 if (!sym_is_global (abfd, sym))
4148 i = num_locals + num_globals2++;
4150 sym->udata.i = i + 1;
4154 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
4156 *pnum_locals = num_locals;
4160 /* Align to the maximum file alignment that could be required for any
4161 ELF data structure. */
4163 static inline file_ptr
4164 align_file_position (file_ptr off, int align)
4166 return (off + align - 1) & ~(align - 1);
4169 /* Assign a file position to a section, optionally aligning to the
4170 required section alignment. */
4173 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
4177 if (align && i_shdrp->sh_addralign > 1)
4178 offset = BFD_ALIGN (offset, i_shdrp->sh_addralign);
4179 i_shdrp->sh_offset = offset;
4180 if (i_shdrp->bfd_section != NULL)
4181 i_shdrp->bfd_section->filepos = offset;
4182 if (i_shdrp->sh_type != SHT_NOBITS)
4183 offset += i_shdrp->sh_size;
4187 /* Compute the file positions we are going to put the sections at, and
4188 otherwise prepare to begin writing out the ELF file. If LINK_INFO
4189 is not NULL, this is being called by the ELF backend linker. */
4192 _bfd_elf_compute_section_file_positions (bfd *abfd,
4193 struct bfd_link_info *link_info)
4195 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4196 struct fake_section_arg fsargs;
4198 struct elf_strtab_hash *strtab = NULL;
4199 Elf_Internal_Shdr *shstrtab_hdr;
4200 bfd_boolean need_symtab;
4202 if (abfd->output_has_begun)
4205 /* Do any elf backend specific processing first. */
4206 if (bed->elf_backend_begin_write_processing)
4207 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
4209 if (! prep_headers (abfd))
4212 /* Post process the headers if necessary. */
4213 (*bed->elf_backend_post_process_headers) (abfd, link_info);
4215 fsargs.failed = FALSE;
4216 fsargs.link_info = link_info;
4217 bfd_map_over_sections (abfd, elf_fake_sections, &fsargs);
4221 if (!assign_section_numbers (abfd, link_info))
4224 /* The backend linker builds symbol table information itself. */
4225 need_symtab = (link_info == NULL
4226 && (bfd_get_symcount (abfd) > 0
4227 || ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
4231 /* Non-zero if doing a relocatable link. */
4232 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
4234 if (! swap_out_syms (abfd, &strtab, relocatable_p))
4239 if (link_info == NULL)
4241 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
4246 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
4247 /* sh_name was set in prep_headers. */
4248 shstrtab_hdr->sh_type = SHT_STRTAB;
4249 shstrtab_hdr->sh_flags = bed->elf_strtab_flags;
4250 shstrtab_hdr->sh_addr = 0;
4251 /* sh_size is set in _bfd_elf_assign_file_positions_for_non_load. */
4252 shstrtab_hdr->sh_entsize = 0;
4253 shstrtab_hdr->sh_link = 0;
4254 shstrtab_hdr->sh_info = 0;
4255 /* sh_offset is set in _bfd_elf_assign_file_positions_for_non_load. */
4256 shstrtab_hdr->sh_addralign = 1;
4258 if (!assign_file_positions_except_relocs (abfd, link_info))
4264 Elf_Internal_Shdr *hdr;
4266 off = elf_next_file_pos (abfd);
4268 hdr = & elf_symtab_hdr (abfd);
4269 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4271 if (elf_symtab_shndx_list (abfd) != NULL)
4273 hdr = & elf_symtab_shndx_list (abfd)->hdr;
4274 if (hdr->sh_size != 0)
4275 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4276 /* FIXME: What about other symtab_shndx sections in the list ? */
4279 hdr = &elf_tdata (abfd)->strtab_hdr;
4280 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4282 elf_next_file_pos (abfd) = off;
4284 /* Now that we know where the .strtab section goes, write it
4286 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
4287 || ! _bfd_elf_strtab_emit (abfd, strtab))
4289 _bfd_elf_strtab_free (strtab);
4292 abfd->output_has_begun = TRUE;
4297 /* Make an initial estimate of the size of the program header. If we
4298 get the number wrong here, we'll redo section placement. */
4300 static bfd_size_type
4301 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
4305 const struct elf_backend_data *bed;
4307 /* Assume we will need exactly two PT_LOAD segments: one for text
4308 and one for data. */
4311 s = bfd_get_section_by_name (abfd, ".interp");
4312 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4314 /* If we have a loadable interpreter section, we need a
4315 PT_INTERP segment. In this case, assume we also need a
4316 PT_PHDR segment, although that may not be true for all
4321 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4323 /* We need a PT_DYNAMIC segment. */
4327 if (info != NULL && info->relro)
4329 /* We need a PT_GNU_RELRO segment. */
4333 if (elf_eh_frame_hdr (abfd))
4335 /* We need a PT_GNU_EH_FRAME segment. */
4339 if (elf_stack_flags (abfd))
4341 /* We need a PT_GNU_STACK segment. */
4345 for (s = abfd->sections; s != NULL; s = s->next)
4347 if ((s->flags & SEC_LOAD) != 0
4348 && CONST_STRNEQ (s->name, ".note"))
4350 /* We need a PT_NOTE segment. */
4352 /* Try to create just one PT_NOTE segment
4353 for all adjacent loadable .note* sections.
4354 gABI requires that within a PT_NOTE segment
4355 (and also inside of each SHT_NOTE section)
4356 each note is padded to a multiple of 4 size,
4357 so we check whether the sections are correctly
4359 if (s->alignment_power == 2)
4360 while (s->next != NULL
4361 && s->next->alignment_power == 2
4362 && (s->next->flags & SEC_LOAD) != 0
4363 && CONST_STRNEQ (s->next->name, ".note"))
4368 for (s = abfd->sections; s != NULL; s = s->next)
4370 if (s->flags & SEC_THREAD_LOCAL)
4372 /* We need a PT_TLS segment. */
4378 bed = get_elf_backend_data (abfd);
4380 if ((abfd->flags & D_PAGED) != 0)
4382 /* Add a PT_GNU_MBIND segment for each mbind section. */
4383 unsigned int page_align_power = bfd_log2 (bed->commonpagesize);
4384 for (s = abfd->sections; s != NULL; s = s->next)
4385 if (elf_section_flags (s) & SHF_GNU_MBIND)
4387 if (elf_section_data (s)->this_hdr.sh_info
4391 /* xgettext:c-format */
4392 (_("%pB: GNU_MBIN section `%pA' has invalid sh_info field: %d"),
4393 abfd, s, elf_section_data (s)->this_hdr.sh_info);
4396 /* Align mbind section to page size. */
4397 if (s->alignment_power < page_align_power)
4398 s->alignment_power = page_align_power;
4403 /* Let the backend count up any program headers it might need. */
4404 if (bed->elf_backend_additional_program_headers)
4408 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
4414 return segs * bed->s->sizeof_phdr;
4417 /* Find the segment that contains the output_section of section. */
4420 _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section)
4422 struct elf_segment_map *m;
4423 Elf_Internal_Phdr *p;
4425 for (m = elf_seg_map (abfd), p = elf_tdata (abfd)->phdr;
4431 for (i = m->count - 1; i >= 0; i--)
4432 if (m->sections[i] == section)
4439 /* Create a mapping from a set of sections to a program segment. */
4441 static struct elf_segment_map *
4442 make_mapping (bfd *abfd,
4443 asection **sections,
4448 struct elf_segment_map *m;
4453 amt = sizeof (struct elf_segment_map);
4454 amt += (to - from - 1) * sizeof (asection *);
4455 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4459 m->p_type = PT_LOAD;
4460 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
4461 m->sections[i - from] = *hdrpp;
4462 m->count = to - from;
4464 if (from == 0 && phdr)
4466 /* Include the headers in the first PT_LOAD segment. */
4467 m->includes_filehdr = 1;
4468 m->includes_phdrs = 1;
4474 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
4477 struct elf_segment_map *
4478 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
4480 struct elf_segment_map *m;
4482 m = (struct elf_segment_map *) bfd_zalloc (abfd,
4483 sizeof (struct elf_segment_map));
4487 m->p_type = PT_DYNAMIC;
4489 m->sections[0] = dynsec;
4494 /* Possibly add or remove segments from the segment map. */
4497 elf_modify_segment_map (bfd *abfd,
4498 struct bfd_link_info *info,
4499 bfd_boolean remove_empty_load)
4501 struct elf_segment_map **m;
4502 const struct elf_backend_data *bed;
4504 /* The placement algorithm assumes that non allocated sections are
4505 not in PT_LOAD segments. We ensure this here by removing such
4506 sections from the segment map. We also remove excluded
4507 sections. Finally, any PT_LOAD segment without sections is
4509 m = &elf_seg_map (abfd);
4512 unsigned int i, new_count;
4514 for (new_count = 0, i = 0; i < (*m)->count; i++)
4516 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
4517 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
4518 || (*m)->p_type != PT_LOAD))
4520 (*m)->sections[new_count] = (*m)->sections[i];
4524 (*m)->count = new_count;
4526 if (remove_empty_load
4527 && (*m)->p_type == PT_LOAD
4529 && !(*m)->includes_phdrs)
4535 bed = get_elf_backend_data (abfd);
4536 if (bed->elf_backend_modify_segment_map != NULL)
4538 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
4545 #define IS_TBSS(s) \
4546 ((s->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) == SEC_THREAD_LOCAL)
4548 /* Set up a mapping from BFD sections to program segments. */
4551 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
4554 struct elf_segment_map *m;
4555 asection **sections = NULL;
4556 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4557 bfd_boolean no_user_phdrs;
4559 no_user_phdrs = elf_seg_map (abfd) == NULL;
4562 info->user_phdrs = !no_user_phdrs;
4564 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
4568 struct elf_segment_map *mfirst;
4569 struct elf_segment_map **pm;
4572 unsigned int phdr_index;
4573 bfd_vma maxpagesize;
4575 bfd_boolean phdr_in_segment = TRUE;
4576 bfd_boolean writable;
4577 bfd_boolean executable;
4579 asection *first_tls = NULL;
4580 asection *first_mbind = NULL;
4581 asection *dynsec, *eh_frame_hdr;
4583 bfd_vma addr_mask, wrap_to = 0;
4584 bfd_boolean linker_created_pt_phdr_segment = FALSE;
4586 /* Select the allocated sections, and sort them. */
4588 sections = (asection **) bfd_malloc2 (bfd_count_sections (abfd),
4589 sizeof (asection *));
4590 if (sections == NULL)
4593 /* Calculate top address, avoiding undefined behaviour of shift
4594 left operator when shift count is equal to size of type
4596 addr_mask = ((bfd_vma) 1 << (bfd_arch_bits_per_address (abfd) - 1)) - 1;
4597 addr_mask = (addr_mask << 1) + 1;
4600 for (s = abfd->sections; s != NULL; s = s->next)
4602 if ((s->flags & SEC_ALLOC) != 0)
4606 /* A wrapping section potentially clashes with header. */
4607 if (((s->lma + s->size) & addr_mask) < (s->lma & addr_mask))
4608 wrap_to = (s->lma + s->size) & addr_mask;
4611 BFD_ASSERT (i <= bfd_count_sections (abfd));
4614 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
4616 /* Build the mapping. */
4621 /* If we have a .interp section, then create a PT_PHDR segment for
4622 the program headers and a PT_INTERP segment for the .interp
4624 s = bfd_get_section_by_name (abfd, ".interp");
4625 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4627 amt = sizeof (struct elf_segment_map);
4628 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4632 m->p_type = PT_PHDR;
4634 m->p_flags_valid = 1;
4635 m->includes_phdrs = 1;
4636 linker_created_pt_phdr_segment = TRUE;
4640 amt = sizeof (struct elf_segment_map);
4641 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4645 m->p_type = PT_INTERP;
4653 /* Look through the sections. We put sections in the same program
4654 segment when the start of the second section can be placed within
4655 a few bytes of the end of the first section. */
4659 maxpagesize = bed->maxpagesize;
4660 /* PR 17512: file: c8455299.
4661 Avoid divide-by-zero errors later on.
4662 FIXME: Should we abort if the maxpagesize is zero ? */
4663 if (maxpagesize == 0)
4667 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
4669 && (dynsec->flags & SEC_LOAD) == 0)
4672 /* Deal with -Ttext or something similar such that the first section
4673 is not adjacent to the program headers. This is an
4674 approximation, since at this point we don't know exactly how many
4675 program headers we will need. */
4678 bfd_size_type phdr_size = elf_program_header_size (abfd);
4680 if (phdr_size == (bfd_size_type) -1)
4681 phdr_size = get_program_header_size (abfd, info);
4682 phdr_size += bed->s->sizeof_ehdr;
4683 if ((abfd->flags & D_PAGED) == 0
4684 || (sections[0]->lma & addr_mask) < phdr_size
4685 || ((sections[0]->lma & addr_mask) % maxpagesize
4686 < phdr_size % maxpagesize)
4687 || (sections[0]->lma & addr_mask & -maxpagesize) < wrap_to)
4689 /* PR 20815: The ELF standard says that a PT_PHDR segment, if
4690 present, must be included as part of the memory image of the
4691 program. Ie it must be part of a PT_LOAD segment as well.
4692 If we have had to create our own PT_PHDR segment, but it is
4693 not going to be covered by the first PT_LOAD segment, then
4694 force the inclusion if we can... */
4695 if ((abfd->flags & D_PAGED) != 0
4696 && linker_created_pt_phdr_segment)
4697 phdr_in_segment = TRUE;
4699 phdr_in_segment = FALSE;
4703 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
4706 bfd_boolean new_segment;
4710 /* See if this section and the last one will fit in the same
4713 if (last_hdr == NULL)
4715 /* If we don't have a segment yet, then we don't need a new
4716 one (we build the last one after this loop). */
4717 new_segment = FALSE;
4719 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
4721 /* If this section has a different relation between the
4722 virtual address and the load address, then we need a new
4726 else if (hdr->lma < last_hdr->lma + last_size
4727 || last_hdr->lma + last_size < last_hdr->lma)
4729 /* If this section has a load address that makes it overlap
4730 the previous section, then we need a new segment. */
4733 else if ((abfd->flags & D_PAGED) != 0
4734 && (((last_hdr->lma + last_size - 1) & -maxpagesize)
4735 == (hdr->lma & -maxpagesize)))
4737 /* If we are demand paged then we can't map two disk
4738 pages onto the same memory page. */
4739 new_segment = FALSE;
4741 /* In the next test we have to be careful when last_hdr->lma is close
4742 to the end of the address space. If the aligned address wraps
4743 around to the start of the address space, then there are no more
4744 pages left in memory and it is OK to assume that the current
4745 section can be included in the current segment. */
4746 else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
4747 + maxpagesize > last_hdr->lma)
4748 && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
4749 + maxpagesize <= hdr->lma))
4751 /* If putting this section in this segment would force us to
4752 skip a page in the segment, then we need a new segment. */
4755 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
4756 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
4758 /* We don't want to put a loaded section after a
4759 nonloaded (ie. bss style) section in the same segment
4760 as that will force the non-loaded section to be loaded.
4761 Consider .tbss sections as loaded for this purpose. */
4764 else if ((abfd->flags & D_PAGED) == 0)
4766 /* If the file is not demand paged, which means that we
4767 don't require the sections to be correctly aligned in the
4768 file, then there is no other reason for a new segment. */
4769 new_segment = FALSE;
4771 else if (info != NULL
4772 && info->separate_code
4773 && executable != ((hdr->flags & SEC_CODE) != 0))
4778 && (hdr->flags & SEC_READONLY) == 0)
4780 /* We don't want to put a writable section in a read only
4786 /* Otherwise, we can use the same segment. */
4787 new_segment = FALSE;
4790 /* Allow interested parties a chance to override our decision. */
4791 if (last_hdr != NULL
4793 && info->callbacks->override_segment_assignment != NULL)
4795 = info->callbacks->override_segment_assignment (info, abfd, hdr,
4801 if ((hdr->flags & SEC_READONLY) == 0)
4803 if ((hdr->flags & SEC_CODE) != 0)
4806 /* .tbss sections effectively have zero size. */
4807 last_size = !IS_TBSS (hdr) ? hdr->size : 0;
4811 /* We need a new program segment. We must create a new program
4812 header holding all the sections from phdr_index until hdr. */
4814 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4821 if ((hdr->flags & SEC_READONLY) == 0)
4826 if ((hdr->flags & SEC_CODE) == 0)
4832 /* .tbss sections effectively have zero size. */
4833 last_size = !IS_TBSS (hdr) ? hdr->size : 0;
4835 phdr_in_segment = FALSE;
4838 /* Create a final PT_LOAD program segment, but not if it's just
4840 if (last_hdr != NULL
4841 && (i - phdr_index != 1
4842 || !IS_TBSS (last_hdr)))
4844 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4852 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
4855 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
4862 /* For each batch of consecutive loadable .note sections,
4863 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
4864 because if we link together nonloadable .note sections and
4865 loadable .note sections, we will generate two .note sections
4866 in the output file. FIXME: Using names for section types is
4868 for (s = abfd->sections; s != NULL; s = s->next)
4870 if ((s->flags & SEC_LOAD) != 0
4871 && CONST_STRNEQ (s->name, ".note"))
4876 amt = sizeof (struct elf_segment_map);
4877 if (s->alignment_power == 2)
4878 for (s2 = s; s2->next != NULL; s2 = s2->next)
4880 if (s2->next->alignment_power == 2
4881 && (s2->next->flags & SEC_LOAD) != 0
4882 && CONST_STRNEQ (s2->next->name, ".note")
4883 && align_power (s2->lma + s2->size, 2)
4889 amt += (count - 1) * sizeof (asection *);
4890 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4894 m->p_type = PT_NOTE;
4898 m->sections[m->count - count--] = s;
4899 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4902 m->sections[m->count - 1] = s;
4903 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4907 if (s->flags & SEC_THREAD_LOCAL)
4913 if (first_mbind == NULL
4914 && (elf_section_flags (s) & SHF_GNU_MBIND) != 0)
4918 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
4921 amt = sizeof (struct elf_segment_map);
4922 amt += (tls_count - 1) * sizeof (asection *);
4923 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4928 m->count = tls_count;
4929 /* Mandated PF_R. */
4931 m->p_flags_valid = 1;
4933 for (i = 0; i < (unsigned int) tls_count; ++i)
4935 if ((s->flags & SEC_THREAD_LOCAL) == 0)
4938 (_("%pB: TLS sections are not adjacent:"), abfd);
4941 while (i < (unsigned int) tls_count)
4943 if ((s->flags & SEC_THREAD_LOCAL) != 0)
4945 _bfd_error_handler (_(" TLS: %pA"), s);
4949 _bfd_error_handler (_(" non-TLS: %pA"), s);
4952 bfd_set_error (bfd_error_bad_value);
4963 if (first_mbind && (abfd->flags & D_PAGED) != 0)
4964 for (s = first_mbind; s != NULL; s = s->next)
4965 if ((elf_section_flags (s) & SHF_GNU_MBIND) != 0
4966 && (elf_section_data (s)->this_hdr.sh_info
4967 <= PT_GNU_MBIND_NUM))
4969 /* Mandated PF_R. */
4970 unsigned long p_flags = PF_R;
4971 if ((s->flags & SEC_READONLY) == 0)
4973 if ((s->flags & SEC_CODE) != 0)
4976 amt = sizeof (struct elf_segment_map) + sizeof (asection *);
4977 m = bfd_zalloc (abfd, amt);
4981 m->p_type = (PT_GNU_MBIND_LO
4982 + elf_section_data (s)->this_hdr.sh_info);
4984 m->p_flags_valid = 1;
4986 m->p_flags = p_flags;
4992 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
4994 eh_frame_hdr = elf_eh_frame_hdr (abfd);
4995 if (eh_frame_hdr != NULL
4996 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
4998 amt = sizeof (struct elf_segment_map);
4999 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
5003 m->p_type = PT_GNU_EH_FRAME;
5005 m->sections[0] = eh_frame_hdr->output_section;
5011 if (elf_stack_flags (abfd))
5013 amt = sizeof (struct elf_segment_map);
5014 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
5018 m->p_type = PT_GNU_STACK;
5019 m->p_flags = elf_stack_flags (abfd);
5020 m->p_align = bed->stack_align;
5021 m->p_flags_valid = 1;
5022 m->p_align_valid = m->p_align != 0;
5023 if (info->stacksize > 0)
5025 m->p_size = info->stacksize;
5026 m->p_size_valid = 1;
5033 if (info != NULL && info->relro)
5035 for (m = mfirst; m != NULL; m = m->next)
5037 if (m->p_type == PT_LOAD
5039 && m->sections[0]->vma >= info->relro_start
5040 && m->sections[0]->vma < info->relro_end)
5043 while (--i != (unsigned) -1)
5044 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS))
5045 == (SEC_LOAD | SEC_HAS_CONTENTS))
5048 if (i != (unsigned) -1)
5053 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
5056 amt = sizeof (struct elf_segment_map);
5057 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
5061 m->p_type = PT_GNU_RELRO;
5068 elf_seg_map (abfd) = mfirst;
5071 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
5074 for (count = 0, m = elf_seg_map (abfd); m != NULL; m = m->next)
5076 elf_program_header_size (abfd) = count * bed->s->sizeof_phdr;
5081 if (sections != NULL)
5086 /* Sort sections by address. */
5089 elf_sort_sections (const void *arg1, const void *arg2)
5091 const asection *sec1 = *(const asection **) arg1;
5092 const asection *sec2 = *(const asection **) arg2;
5093 bfd_size_type size1, size2;
5095 /* Sort by LMA first, since this is the address used to
5096 place the section into a segment. */
5097 if (sec1->lma < sec2->lma)
5099 else if (sec1->lma > sec2->lma)
5102 /* Then sort by VMA. Normally the LMA and the VMA will be
5103 the same, and this will do nothing. */
5104 if (sec1->vma < sec2->vma)
5106 else if (sec1->vma > sec2->vma)
5109 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
5111 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
5117 /* If the indicies are the same, do not return 0
5118 here, but continue to try the next comparison. */
5119 if (sec1->target_index - sec2->target_index != 0)
5120 return sec1->target_index - sec2->target_index;
5125 else if (TOEND (sec2))
5130 /* Sort by size, to put zero sized sections
5131 before others at the same address. */
5133 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
5134 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
5141 return sec1->target_index - sec2->target_index;
5144 /* Ian Lance Taylor writes:
5146 We shouldn't be using % with a negative signed number. That's just
5147 not good. We have to make sure either that the number is not
5148 negative, or that the number has an unsigned type. When the types
5149 are all the same size they wind up as unsigned. When file_ptr is a
5150 larger signed type, the arithmetic winds up as signed long long,
5153 What we're trying to say here is something like ``increase OFF by
5154 the least amount that will cause it to be equal to the VMA modulo
5156 /* In other words, something like:
5158 vma_offset = m->sections[0]->vma % bed->maxpagesize;
5159 off_offset = off % bed->maxpagesize;
5160 if (vma_offset < off_offset)
5161 adjustment = vma_offset + bed->maxpagesize - off_offset;
5163 adjustment = vma_offset - off_offset;
5165 which can be collapsed into the expression below. */
5168 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
5170 /* PR binutils/16199: Handle an alignment of zero. */
5171 if (maxpagesize == 0)
5173 return ((vma - off) % maxpagesize);
5177 print_segment_map (const struct elf_segment_map *m)
5180 const char *pt = get_segment_type (m->p_type);
5185 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
5186 sprintf (buf, "LOPROC+%7.7x",
5187 (unsigned int) (m->p_type - PT_LOPROC));
5188 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
5189 sprintf (buf, "LOOS+%7.7x",
5190 (unsigned int) (m->p_type - PT_LOOS));
5192 snprintf (buf, sizeof (buf), "%8.8x",
5193 (unsigned int) m->p_type);
5197 fprintf (stderr, "%s:", pt);
5198 for (j = 0; j < m->count; j++)
5199 fprintf (stderr, " %s", m->sections [j]->name);
5205 write_zeros (bfd *abfd, file_ptr pos, bfd_size_type len)
5210 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
5212 buf = bfd_zmalloc (len);
5215 ret = bfd_bwrite (buf, len, abfd) == len;
5220 /* Assign file positions to the sections based on the mapping from
5221 sections to segments. This function also sets up some fields in
5225 assign_file_positions_for_load_sections (bfd *abfd,
5226 struct bfd_link_info *link_info)
5228 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5229 struct elf_segment_map *m;
5230 Elf_Internal_Phdr *phdrs;
5231 Elf_Internal_Phdr *p;
5233 bfd_size_type maxpagesize;
5234 unsigned int pt_load_count = 0;
5237 bfd_vma header_pad = 0;
5239 if (link_info == NULL
5240 && !_bfd_elf_map_sections_to_segments (abfd, link_info))
5244 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
5248 header_pad = m->header_size;
5253 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
5254 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
5258 /* PR binutils/12467. */
5259 elf_elfheader (abfd)->e_phoff = 0;
5260 elf_elfheader (abfd)->e_phentsize = 0;
5263 elf_elfheader (abfd)->e_phnum = alloc;
5265 if (elf_program_header_size (abfd) == (bfd_size_type) -1)
5266 elf_program_header_size (abfd) = alloc * bed->s->sizeof_phdr;
5268 BFD_ASSERT (elf_program_header_size (abfd)
5269 >= alloc * bed->s->sizeof_phdr);
5273 elf_next_file_pos (abfd) = bed->s->sizeof_ehdr;
5277 /* We're writing the size in elf_program_header_size (abfd),
5278 see assign_file_positions_except_relocs, so make sure we have
5279 that amount allocated, with trailing space cleared.
5280 The variable alloc contains the computed need, while
5281 elf_program_header_size (abfd) contains the size used for the
5283 See ld/emultempl/elf-generic.em:gld${EMULATION_NAME}_map_segments
5284 where the layout is forced to according to a larger size in the
5285 last iterations for the testcase ld-elf/header. */
5286 BFD_ASSERT (elf_program_header_size (abfd) % bed->s->sizeof_phdr
5288 phdrs = (Elf_Internal_Phdr *)
5290 (elf_program_header_size (abfd) / bed->s->sizeof_phdr),
5291 sizeof (Elf_Internal_Phdr));
5292 elf_tdata (abfd)->phdr = phdrs;
5297 if ((abfd->flags & D_PAGED) != 0)
5298 maxpagesize = bed->maxpagesize;
5300 off = bed->s->sizeof_ehdr;
5301 off += alloc * bed->s->sizeof_phdr;
5302 if (header_pad < (bfd_vma) off)
5308 for (m = elf_seg_map (abfd), p = phdrs, j = 0;
5310 m = m->next, p++, j++)
5314 bfd_boolean no_contents;
5316 /* If elf_segment_map is not from map_sections_to_segments, the
5317 sections may not be correctly ordered. NOTE: sorting should
5318 not be done to the PT_NOTE section of a corefile, which may
5319 contain several pseudo-sections artificially created by bfd.
5320 Sorting these pseudo-sections breaks things badly. */
5322 && !(elf_elfheader (abfd)->e_type == ET_CORE
5323 && m->p_type == PT_NOTE))
5324 qsort (m->sections, (size_t) m->count, sizeof (asection *),
5327 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
5328 number of sections with contents contributing to both p_filesz
5329 and p_memsz, followed by a number of sections with no contents
5330 that just contribute to p_memsz. In this loop, OFF tracks next
5331 available file offset for PT_LOAD and PT_NOTE segments. */
5332 p->p_type = m->p_type;
5333 p->p_flags = m->p_flags;
5338 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
5340 if (m->p_paddr_valid)
5341 p->p_paddr = m->p_paddr;
5342 else if (m->count == 0)
5345 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
5347 if (p->p_type == PT_LOAD
5348 && (abfd->flags & D_PAGED) != 0)
5350 /* p_align in demand paged PT_LOAD segments effectively stores
5351 the maximum page size. When copying an executable with
5352 objcopy, we set m->p_align from the input file. Use this
5353 value for maxpagesize rather than bed->maxpagesize, which
5354 may be different. Note that we use maxpagesize for PT_TLS
5355 segment alignment later in this function, so we are relying
5356 on at least one PT_LOAD segment appearing before a PT_TLS
5358 if (m->p_align_valid)
5359 maxpagesize = m->p_align;
5361 p->p_align = maxpagesize;
5364 else if (m->p_align_valid)
5365 p->p_align = m->p_align;
5366 else if (m->count == 0)
5367 p->p_align = 1 << bed->s->log_file_align;
5371 no_contents = FALSE;
5373 if (p->p_type == PT_LOAD
5376 bfd_size_type align;
5377 unsigned int align_power = 0;
5379 if (m->p_align_valid)
5383 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
5385 unsigned int secalign;
5387 secalign = bfd_get_section_alignment (abfd, *secpp);
5388 if (secalign > align_power)
5389 align_power = secalign;
5391 align = (bfd_size_type) 1 << align_power;
5392 if (align < maxpagesize)
5393 align = maxpagesize;
5396 for (i = 0; i < m->count; i++)
5397 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
5398 /* If we aren't making room for this section, then
5399 it must be SHT_NOBITS regardless of what we've
5400 set via struct bfd_elf_special_section. */
5401 elf_section_type (m->sections[i]) = SHT_NOBITS;
5403 /* Find out whether this segment contains any loadable
5406 for (i = 0; i < m->count; i++)
5407 if (elf_section_type (m->sections[i]) != SHT_NOBITS)
5409 no_contents = FALSE;
5413 off_adjust = vma_page_aligned_bias (p->p_vaddr, off, align);
5415 /* Broken hardware and/or kernel require that files do not
5416 map the same page with different permissions on some hppa
5418 if (pt_load_count > 1
5419 && bed->no_page_alias
5420 && (off & (maxpagesize - 1)) != 0
5421 && (off & -maxpagesize) == ((off + off_adjust) & -maxpagesize))
5422 off_adjust += maxpagesize;
5426 /* We shouldn't need to align the segment on disk since
5427 the segment doesn't need file space, but the gABI
5428 arguably requires the alignment and glibc ld.so
5429 checks it. So to comply with the alignment
5430 requirement but not waste file space, we adjust
5431 p_offset for just this segment. (OFF_ADJUST is
5432 subtracted from OFF later.) This may put p_offset
5433 past the end of file, but that shouldn't matter. */
5438 /* Make sure the .dynamic section is the first section in the
5439 PT_DYNAMIC segment. */
5440 else if (p->p_type == PT_DYNAMIC
5442 && strcmp (m->sections[0]->name, ".dynamic") != 0)
5445 (_("%pB: The first section in the PT_DYNAMIC segment"
5446 " is not the .dynamic section"),
5448 bfd_set_error (bfd_error_bad_value);
5451 /* Set the note section type to SHT_NOTE. */
5452 else if (p->p_type == PT_NOTE)
5453 for (i = 0; i < m->count; i++)
5454 elf_section_type (m->sections[i]) = SHT_NOTE;
5460 if (m->includes_filehdr)
5462 if (!m->p_flags_valid)
5464 p->p_filesz = bed->s->sizeof_ehdr;
5465 p->p_memsz = bed->s->sizeof_ehdr;
5468 if (p->p_vaddr < (bfd_vma) off
5469 || (!m->p_paddr_valid
5470 && p->p_paddr < (bfd_vma) off))
5473 (_("%pB: Not enough room for program headers,"
5474 " try linking with -N"),
5476 bfd_set_error (bfd_error_bad_value);
5481 if (!m->p_paddr_valid)
5486 if (m->includes_phdrs)
5488 if (!m->p_flags_valid)
5491 if (!m->includes_filehdr)
5493 p->p_offset = bed->s->sizeof_ehdr;
5497 p->p_vaddr -= off - p->p_offset;
5498 if (!m->p_paddr_valid)
5499 p->p_paddr -= off - p->p_offset;
5503 p->p_filesz += alloc * bed->s->sizeof_phdr;
5504 p->p_memsz += alloc * bed->s->sizeof_phdr;
5507 p->p_filesz += header_pad;
5508 p->p_memsz += header_pad;
5512 if (p->p_type == PT_LOAD
5513 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
5515 if (!m->includes_filehdr && !m->includes_phdrs)
5521 adjust = off - (p->p_offset + p->p_filesz);
5523 p->p_filesz += adjust;
5524 p->p_memsz += adjust;
5528 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
5529 maps. Set filepos for sections in PT_LOAD segments, and in
5530 core files, for sections in PT_NOTE segments.
5531 assign_file_positions_for_non_load_sections will set filepos
5532 for other sections and update p_filesz for other segments. */
5533 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
5536 bfd_size_type align;
5537 Elf_Internal_Shdr *this_hdr;
5540 this_hdr = &elf_section_data (sec)->this_hdr;
5541 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
5543 if ((p->p_type == PT_LOAD
5544 || p->p_type == PT_TLS)
5545 && (this_hdr->sh_type != SHT_NOBITS
5546 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
5547 && ((this_hdr->sh_flags & SHF_TLS) == 0
5548 || p->p_type == PT_TLS))))
5550 bfd_vma p_start = p->p_paddr;
5551 bfd_vma p_end = p_start + p->p_memsz;
5552 bfd_vma s_start = sec->lma;
5553 bfd_vma adjust = s_start - p_end;
5557 || p_end < p_start))
5560 /* xgettext:c-format */
5561 (_("%pB: section %pA lma %#Lx adjusted to %#Lx"),
5562 abfd, sec, s_start, p_end);
5566 p->p_memsz += adjust;
5568 if (this_hdr->sh_type != SHT_NOBITS)
5570 if (p->p_filesz + adjust < p->p_memsz)
5572 /* We have a PROGBITS section following NOBITS ones.
5573 Allocate file space for the NOBITS section(s) and
5575 adjust = p->p_memsz - p->p_filesz;
5576 if (!write_zeros (abfd, off, adjust))
5580 p->p_filesz += adjust;
5584 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
5586 /* The section at i == 0 is the one that actually contains
5590 this_hdr->sh_offset = sec->filepos = off;
5591 off += this_hdr->sh_size;
5592 p->p_filesz = this_hdr->sh_size;
5598 /* The rest are fake sections that shouldn't be written. */
5607 if (p->p_type == PT_LOAD)
5609 this_hdr->sh_offset = sec->filepos = off;
5610 if (this_hdr->sh_type != SHT_NOBITS)
5611 off += this_hdr->sh_size;
5613 else if (this_hdr->sh_type == SHT_NOBITS
5614 && (this_hdr->sh_flags & SHF_TLS) != 0
5615 && this_hdr->sh_offset == 0)
5617 /* This is a .tbss section that didn't get a PT_LOAD.
5618 (See _bfd_elf_map_sections_to_segments "Create a
5619 final PT_LOAD".) Set sh_offset to the value it
5620 would have if we had created a zero p_filesz and
5621 p_memsz PT_LOAD header for the section. This
5622 also makes the PT_TLS header have the same
5624 bfd_vma adjust = vma_page_aligned_bias (this_hdr->sh_addr,
5626 this_hdr->sh_offset = sec->filepos = off + adjust;
5629 if (this_hdr->sh_type != SHT_NOBITS)
5631 p->p_filesz += this_hdr->sh_size;
5632 /* A load section without SHF_ALLOC is something like
5633 a note section in a PT_NOTE segment. These take
5634 file space but are not loaded into memory. */
5635 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
5636 p->p_memsz += this_hdr->sh_size;
5638 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
5640 if (p->p_type == PT_TLS)
5641 p->p_memsz += this_hdr->sh_size;
5643 /* .tbss is special. It doesn't contribute to p_memsz of
5645 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
5646 p->p_memsz += this_hdr->sh_size;
5649 if (align > p->p_align
5650 && !m->p_align_valid
5651 && (p->p_type != PT_LOAD
5652 || (abfd->flags & D_PAGED) == 0))
5656 if (!m->p_flags_valid)
5659 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
5661 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
5668 /* Check that all sections are in a PT_LOAD segment.
5669 Don't check funky gdb generated core files. */
5670 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
5672 bfd_boolean check_vma = TRUE;
5674 for (i = 1; i < m->count; i++)
5675 if (m->sections[i]->vma == m->sections[i - 1]->vma
5676 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i])
5677 ->this_hdr), p) != 0
5678 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i - 1])
5679 ->this_hdr), p) != 0)
5681 /* Looks like we have overlays packed into the segment. */
5686 for (i = 0; i < m->count; i++)
5688 Elf_Internal_Shdr *this_hdr;
5691 sec = m->sections[i];
5692 this_hdr = &(elf_section_data(sec)->this_hdr);
5693 if (!ELF_SECTION_IN_SEGMENT_1 (this_hdr, p, check_vma, 0)
5694 && !ELF_TBSS_SPECIAL (this_hdr, p))
5697 /* xgettext:c-format */
5698 (_("%pB: section `%pA' can't be allocated in segment %d"),
5700 print_segment_map (m);
5706 elf_next_file_pos (abfd) = off;
5710 /* Assign file positions for the other sections. */
5713 assign_file_positions_for_non_load_sections (bfd *abfd,
5714 struct bfd_link_info *link_info)
5716 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5717 Elf_Internal_Shdr **i_shdrpp;
5718 Elf_Internal_Shdr **hdrpp, **end_hdrpp;
5719 Elf_Internal_Phdr *phdrs;
5720 Elf_Internal_Phdr *p;
5721 struct elf_segment_map *m;
5722 struct elf_segment_map *hdrs_segment;
5723 bfd_vma filehdr_vaddr, filehdr_paddr;
5724 bfd_vma phdrs_vaddr, phdrs_paddr;
5728 i_shdrpp = elf_elfsections (abfd);
5729 end_hdrpp = i_shdrpp + elf_numsections (abfd);
5730 off = elf_next_file_pos (abfd);
5731 for (hdrpp = i_shdrpp + 1; hdrpp < end_hdrpp; hdrpp++)
5733 Elf_Internal_Shdr *hdr;
5736 if (hdr->bfd_section != NULL
5737 && (hdr->bfd_section->filepos != 0
5738 || (hdr->sh_type == SHT_NOBITS
5739 && hdr->contents == NULL)))
5740 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
5741 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
5743 if (hdr->sh_size != 0)
5745 /* xgettext:c-format */
5746 (_("%pB: warning: allocated section `%s' not in segment"),
5748 (hdr->bfd_section == NULL
5750 : hdr->bfd_section->name));
5751 /* We don't need to page align empty sections. */
5752 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
5753 off += vma_page_aligned_bias (hdr->sh_addr, off,
5756 off += vma_page_aligned_bias (hdr->sh_addr, off,
5758 off = _bfd_elf_assign_file_position_for_section (hdr, off,
5761 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
5762 && hdr->bfd_section == NULL)
5763 || (hdr->bfd_section != NULL
5764 && (hdr->bfd_section->flags & SEC_ELF_COMPRESS))
5765 /* Compress DWARF debug sections. */
5766 || hdr == i_shdrpp[elf_onesymtab (abfd)]
5767 || (elf_symtab_shndx_list (abfd) != NULL
5768 && hdr == i_shdrpp[elf_symtab_shndx_list (abfd)->ndx])
5769 || hdr == i_shdrpp[elf_strtab_sec (abfd)]
5770 || hdr == i_shdrpp[elf_shstrtab_sec (abfd)])
5771 hdr->sh_offset = -1;
5773 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
5776 /* Now that we have set the section file positions, we can set up
5777 the file positions for the non PT_LOAD segments. */
5781 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
5783 hdrs_segment = NULL;
5784 phdrs = elf_tdata (abfd)->phdr;
5785 for (m = elf_seg_map (abfd), p = phdrs; m != NULL; m = m->next, p++)
5788 if (p->p_type != PT_LOAD)
5791 if (m->includes_filehdr)
5793 filehdr_vaddr = p->p_vaddr;
5794 filehdr_paddr = p->p_paddr;
5796 if (m->includes_phdrs)
5798 phdrs_vaddr = p->p_vaddr;
5799 phdrs_paddr = p->p_paddr;
5800 if (m->includes_filehdr)
5803 phdrs_vaddr += bed->s->sizeof_ehdr;
5804 phdrs_paddr += bed->s->sizeof_ehdr;
5809 if (hdrs_segment != NULL && link_info != NULL)
5811 /* There is a segment that contains both the file headers and the
5812 program headers, so provide a symbol __ehdr_start pointing there.
5813 A program can use this to examine itself robustly. */
5815 struct elf_link_hash_entry *hash
5816 = elf_link_hash_lookup (elf_hash_table (link_info), "__ehdr_start",
5817 FALSE, FALSE, TRUE);
5818 /* If the symbol was referenced and not defined, define it. */
5820 && (hash->root.type == bfd_link_hash_new
5821 || hash->root.type == bfd_link_hash_undefined
5822 || hash->root.type == bfd_link_hash_undefweak
5823 || hash->root.type == bfd_link_hash_common))
5826 if (hdrs_segment->count != 0)
5827 /* The segment contains sections, so use the first one. */
5828 s = hdrs_segment->sections[0];
5830 /* Use the first (i.e. lowest-addressed) section in any segment. */
5831 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
5840 hash->root.u.def.value = filehdr_vaddr - s->vma;
5841 hash->root.u.def.section = s;
5845 hash->root.u.def.value = filehdr_vaddr;
5846 hash->root.u.def.section = bfd_abs_section_ptr;
5849 hash->root.type = bfd_link_hash_defined;
5850 hash->def_regular = 1;
5855 for (m = elf_seg_map (abfd), p = phdrs; m != NULL; m = m->next, p++)
5857 if (p->p_type == PT_GNU_RELRO)
5861 if (link_info != NULL)
5863 /* During linking the range of the RELRO segment is passed
5864 in link_info. Note that there may be padding between
5865 relro_start and the first RELRO section. */
5866 start = link_info->relro_start;
5867 end = link_info->relro_end;
5869 else if (m->count != 0)
5871 if (!m->p_size_valid)
5873 start = m->sections[0]->vma;
5874 end = start + m->p_size;
5884 struct elf_segment_map *lm;
5885 const Elf_Internal_Phdr *lp;
5888 /* Find a LOAD segment containing a section in the RELRO
5890 for (lm = elf_seg_map (abfd), lp = phdrs;
5892 lm = lm->next, lp++)
5894 if (lp->p_type == PT_LOAD
5896 && (lm->sections[lm->count - 1]->vma
5897 + (!IS_TBSS (lm->sections[lm->count - 1])
5898 ? lm->sections[lm->count - 1]->size
5900 && lm->sections[0]->vma < end)
5903 BFD_ASSERT (lm != NULL);
5905 /* Find the section starting the RELRO segment. */
5906 for (i = 0; i < lm->count; i++)
5908 asection *s = lm->sections[i];
5914 BFD_ASSERT (i < lm->count);
5916 p->p_vaddr = lm->sections[i]->vma;
5917 p->p_paddr = lm->sections[i]->lma;
5918 p->p_offset = lm->sections[i]->filepos;
5919 p->p_memsz = end - p->p_vaddr;
5920 p->p_filesz = p->p_memsz;
5922 /* The RELRO segment typically ends a few bytes into
5923 .got.plt but other layouts are possible. In cases
5924 where the end does not match any loaded section (for
5925 instance is in file padding), trim p_filesz back to
5926 correspond to the end of loaded section contents. */
5927 if (p->p_filesz > lp->p_vaddr + lp->p_filesz - p->p_vaddr)
5928 p->p_filesz = lp->p_vaddr + lp->p_filesz - p->p_vaddr;
5930 /* Preserve the alignment and flags if they are valid. The
5931 gold linker generates RW/4 for the PT_GNU_RELRO section.
5932 It is better for objcopy/strip to honor these attributes
5933 otherwise gdb will choke when using separate debug files.
5935 if (!m->p_align_valid)
5937 if (!m->p_flags_valid)
5942 memset (p, 0, sizeof *p);
5943 p->p_type = PT_NULL;
5946 else if (p->p_type == PT_GNU_STACK)
5948 if (m->p_size_valid)
5949 p->p_memsz = m->p_size;
5951 else if (m->count != 0)
5955 if (p->p_type != PT_LOAD
5956 && (p->p_type != PT_NOTE
5957 || bfd_get_format (abfd) != bfd_core))
5959 /* A user specified segment layout may include a PHDR
5960 segment that overlaps with a LOAD segment... */
5961 if (p->p_type == PT_PHDR)
5967 if (m->includes_filehdr || m->includes_phdrs)
5969 /* PR 17512: file: 2195325e. */
5971 (_("%pB: error: non-load segment %d includes file header "
5972 "and/or program header"),
5973 abfd, (int) (p - phdrs));
5978 p->p_offset = m->sections[0]->filepos;
5979 for (i = m->count; i-- != 0;)
5981 asection *sect = m->sections[i];
5982 Elf_Internal_Shdr *hdr = &elf_section_data (sect)->this_hdr;
5983 if (hdr->sh_type != SHT_NOBITS)
5985 p->p_filesz = (sect->filepos - m->sections[0]->filepos
5992 else if (m->includes_filehdr)
5994 p->p_vaddr = filehdr_vaddr;
5995 if (! m->p_paddr_valid)
5996 p->p_paddr = filehdr_paddr;
5998 else if (m->includes_phdrs)
6000 p->p_vaddr = phdrs_vaddr;
6001 if (! m->p_paddr_valid)
6002 p->p_paddr = phdrs_paddr;
6006 elf_next_file_pos (abfd) = off;
6011 static elf_section_list *
6012 find_section_in_list (unsigned int i, elf_section_list * list)
6014 for (;list != NULL; list = list->next)
6020 /* Work out the file positions of all the sections. This is called by
6021 _bfd_elf_compute_section_file_positions. All the section sizes and
6022 VMAs must be known before this is called.
6024 Reloc sections come in two flavours: Those processed specially as
6025 "side-channel" data attached to a section to which they apply, and
6026 those that bfd doesn't process as relocations. The latter sort are
6027 stored in a normal bfd section by bfd_section_from_shdr. We don't
6028 consider the former sort here, unless they form part of the loadable
6029 image. Reloc sections not assigned here will be handled later by
6030 assign_file_positions_for_relocs.
6032 We also don't set the positions of the .symtab and .strtab here. */
6035 assign_file_positions_except_relocs (bfd *abfd,
6036 struct bfd_link_info *link_info)
6038 struct elf_obj_tdata *tdata = elf_tdata (abfd);
6039 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
6040 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6042 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
6043 && bfd_get_format (abfd) != bfd_core)
6045 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
6046 unsigned int num_sec = elf_numsections (abfd);
6047 Elf_Internal_Shdr **hdrpp;
6051 /* Start after the ELF header. */
6052 off = i_ehdrp->e_ehsize;
6054 /* We are not creating an executable, which means that we are
6055 not creating a program header, and that the actual order of
6056 the sections in the file is unimportant. */
6057 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
6059 Elf_Internal_Shdr *hdr;
6062 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
6063 && hdr->bfd_section == NULL)
6064 || (hdr->bfd_section != NULL
6065 && (hdr->bfd_section->flags & SEC_ELF_COMPRESS))
6066 /* Compress DWARF debug sections. */
6067 || i == elf_onesymtab (abfd)
6068 || (elf_symtab_shndx_list (abfd) != NULL
6069 && hdr == i_shdrpp[elf_symtab_shndx_list (abfd)->ndx])
6070 || i == elf_strtab_sec (abfd)
6071 || i == elf_shstrtab_sec (abfd))
6073 hdr->sh_offset = -1;
6076 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
6079 elf_next_file_pos (abfd) = off;
6085 /* Assign file positions for the loaded sections based on the
6086 assignment of sections to segments. */
6087 if (!assign_file_positions_for_load_sections (abfd, link_info))
6090 /* And for non-load sections. */
6091 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
6094 if (bed->elf_backend_modify_program_headers != NULL)
6096 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
6100 /* Set e_type in ELF header to ET_EXEC for -pie -Ttext-segment=. */
6101 if (link_info != NULL && bfd_link_pie (link_info))
6103 unsigned int num_segments = elf_elfheader (abfd)->e_phnum;
6104 Elf_Internal_Phdr *segment = elf_tdata (abfd)->phdr;
6105 Elf_Internal_Phdr *end_segment = &segment[num_segments];
6107 /* Find the lowest p_vaddr in PT_LOAD segments. */
6108 bfd_vma p_vaddr = (bfd_vma) -1;
6109 for (; segment < end_segment; segment++)
6110 if (segment->p_type == PT_LOAD && p_vaddr > segment->p_vaddr)
6111 p_vaddr = segment->p_vaddr;
6113 /* Set e_type to ET_EXEC if the lowest p_vaddr in PT_LOAD
6114 segments is non-zero. */
6116 i_ehdrp->e_type = ET_EXEC;
6119 /* Write out the program headers. */
6120 alloc = elf_program_header_size (abfd) / bed->s->sizeof_phdr;
6122 /* Sort the program headers into the ordering required by the ELF standard. */
6126 /* PR ld/20815 - Check that the program header segment, if present, will
6127 be loaded into memory. FIXME: The check below is not sufficient as
6128 really all PT_LOAD segments should be checked before issuing an error
6129 message. Plus the PHDR segment does not have to be the first segment
6130 in the program header table. But this version of the check should
6131 catch all real world use cases.
6133 FIXME: We used to have code here to sort the PT_LOAD segments into
6134 ascending order, as per the ELF spec. But this breaks some programs,
6135 including the Linux kernel. But really either the spec should be
6136 changed or the programs updated. */
6138 && tdata->phdr[0].p_type == PT_PHDR
6139 && (bed->elf_backend_allow_non_load_phdr == NULL
6140 || !bed->elf_backend_allow_non_load_phdr (abfd, tdata->phdr,
6142 && tdata->phdr[1].p_type == PT_LOAD
6143 && (tdata->phdr[1].p_vaddr > tdata->phdr[0].p_vaddr
6144 || (tdata->phdr[1].p_vaddr + tdata->phdr[1].p_memsz)
6145 < (tdata->phdr[0].p_vaddr + tdata->phdr[0].p_memsz)))
6147 /* The fix for this error is usually to edit the linker script being
6148 used and set up the program headers manually. Either that or
6149 leave room for the headers at the start of the SECTIONS. */
6150 _bfd_error_handler (_("\
6151 %pB: error: PHDR segment not covered by LOAD segment"),
6156 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
6157 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
6165 prep_headers (bfd *abfd)
6167 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form. */
6168 struct elf_strtab_hash *shstrtab;
6169 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6171 i_ehdrp = elf_elfheader (abfd);
6173 shstrtab = _bfd_elf_strtab_init ();
6174 if (shstrtab == NULL)
6177 elf_shstrtab (abfd) = shstrtab;
6179 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
6180 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
6181 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
6182 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
6184 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
6185 i_ehdrp->e_ident[EI_DATA] =
6186 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
6187 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
6189 if ((abfd->flags & DYNAMIC) != 0)
6190 i_ehdrp->e_type = ET_DYN;
6191 else if ((abfd->flags & EXEC_P) != 0)
6192 i_ehdrp->e_type = ET_EXEC;
6193 else if (bfd_get_format (abfd) == bfd_core)
6194 i_ehdrp->e_type = ET_CORE;
6196 i_ehdrp->e_type = ET_REL;
6198 switch (bfd_get_arch (abfd))
6200 case bfd_arch_unknown:
6201 i_ehdrp->e_machine = EM_NONE;
6204 /* There used to be a long list of cases here, each one setting
6205 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
6206 in the corresponding bfd definition. To avoid duplication,
6207 the switch was removed. Machines that need special handling
6208 can generally do it in elf_backend_final_write_processing(),
6209 unless they need the information earlier than the final write.
6210 Such need can generally be supplied by replacing the tests for
6211 e_machine with the conditions used to determine it. */
6213 i_ehdrp->e_machine = bed->elf_machine_code;
6216 i_ehdrp->e_version = bed->s->ev_current;
6217 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
6219 /* No program header, for now. */
6220 i_ehdrp->e_phoff = 0;
6221 i_ehdrp->e_phentsize = 0;
6222 i_ehdrp->e_phnum = 0;
6224 /* Each bfd section is section header entry. */
6225 i_ehdrp->e_entry = bfd_get_start_address (abfd);
6226 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
6228 /* If we're building an executable, we'll need a program header table. */
6229 if (abfd->flags & EXEC_P)
6230 /* It all happens later. */
6234 i_ehdrp->e_phentsize = 0;
6235 i_ehdrp->e_phoff = 0;
6238 elf_tdata (abfd)->symtab_hdr.sh_name =
6239 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
6240 elf_tdata (abfd)->strtab_hdr.sh_name =
6241 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
6242 elf_tdata (abfd)->shstrtab_hdr.sh_name =
6243 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
6244 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
6245 || elf_tdata (abfd)->strtab_hdr.sh_name == (unsigned int) -1
6246 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
6252 /* Assign file positions for all the reloc sections which are not part
6253 of the loadable file image, and the file position of section headers. */
6256 _bfd_elf_assign_file_positions_for_non_load (bfd *abfd)
6259 Elf_Internal_Shdr **shdrpp, **end_shdrpp;
6260 Elf_Internal_Shdr *shdrp;
6261 Elf_Internal_Ehdr *i_ehdrp;
6262 const struct elf_backend_data *bed;
6264 off = elf_next_file_pos (abfd);
6266 shdrpp = elf_elfsections (abfd);
6267 end_shdrpp = shdrpp + elf_numsections (abfd);
6268 for (shdrpp++; shdrpp < end_shdrpp; shdrpp++)
6271 if (shdrp->sh_offset == -1)
6273 asection *sec = shdrp->bfd_section;
6274 bfd_boolean is_rel = (shdrp->sh_type == SHT_REL
6275 || shdrp->sh_type == SHT_RELA);
6277 || (sec != NULL && (sec->flags & SEC_ELF_COMPRESS)))
6281 const char *name = sec->name;
6282 struct bfd_elf_section_data *d;
6284 /* Compress DWARF debug sections. */
6285 if (!bfd_compress_section (abfd, sec,
6289 if (sec->compress_status == COMPRESS_SECTION_DONE
6290 && (abfd->flags & BFD_COMPRESS_GABI) == 0)
6292 /* If section is compressed with zlib-gnu, convert
6293 section name from .debug_* to .zdebug_*. */
6295 = convert_debug_to_zdebug (abfd, name);
6296 if (new_name == NULL)
6300 /* Add section name to section name section. */
6301 if (shdrp->sh_name != (unsigned int) -1)
6304 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
6306 d = elf_section_data (sec);
6308 /* Add reloc section name to section name section. */
6310 && !_bfd_elf_set_reloc_sh_name (abfd,
6315 && !_bfd_elf_set_reloc_sh_name (abfd,
6320 /* Update section size and contents. */
6321 shdrp->sh_size = sec->size;
6322 shdrp->contents = sec->contents;
6323 shdrp->bfd_section->contents = NULL;
6325 off = _bfd_elf_assign_file_position_for_section (shdrp,
6332 /* Place section name section after DWARF debug sections have been
6334 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
6335 shdrp = &elf_tdata (abfd)->shstrtab_hdr;
6336 shdrp->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
6337 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
6339 /* Place the section headers. */
6340 i_ehdrp = elf_elfheader (abfd);
6341 bed = get_elf_backend_data (abfd);
6342 off = align_file_position (off, 1 << bed->s->log_file_align);
6343 i_ehdrp->e_shoff = off;
6344 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
6345 elf_next_file_pos (abfd) = off;
6351 _bfd_elf_write_object_contents (bfd *abfd)
6353 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6354 Elf_Internal_Shdr **i_shdrp;
6356 unsigned int count, num_sec;
6357 struct elf_obj_tdata *t;
6359 if (! abfd->output_has_begun
6360 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6363 i_shdrp = elf_elfsections (abfd);
6366 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
6370 if (!_bfd_elf_assign_file_positions_for_non_load (abfd))
6373 /* After writing the headers, we need to write the sections too... */
6374 num_sec = elf_numsections (abfd);
6375 for (count = 1; count < num_sec; count++)
6377 i_shdrp[count]->sh_name
6378 = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
6379 i_shdrp[count]->sh_name);
6380 if (bed->elf_backend_section_processing)
6381 if (!(*bed->elf_backend_section_processing) (abfd, i_shdrp[count]))
6383 if (i_shdrp[count]->contents)
6385 bfd_size_type amt = i_shdrp[count]->sh_size;
6387 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
6388 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
6393 /* Write out the section header names. */
6394 t = elf_tdata (abfd);
6395 if (elf_shstrtab (abfd) != NULL
6396 && (bfd_seek (abfd, t->shstrtab_hdr.sh_offset, SEEK_SET) != 0
6397 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
6400 if (bed->elf_backend_final_write_processing)
6401 (*bed->elf_backend_final_write_processing) (abfd, elf_linker (abfd));
6403 if (!bed->s->write_shdrs_and_ehdr (abfd))
6406 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
6407 if (t->o->build_id.after_write_object_contents != NULL)
6408 return (*t->o->build_id.after_write_object_contents) (abfd);
6414 _bfd_elf_write_corefile_contents (bfd *abfd)
6416 /* Hopefully this can be done just like an object file. */
6417 return _bfd_elf_write_object_contents (abfd);
6420 /* Given a section, search the header to find them. */
6423 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
6425 const struct elf_backend_data *bed;
6426 unsigned int sec_index;
6428 if (elf_section_data (asect) != NULL
6429 && elf_section_data (asect)->this_idx != 0)
6430 return elf_section_data (asect)->this_idx;
6432 if (bfd_is_abs_section (asect))
6433 sec_index = SHN_ABS;
6434 else if (bfd_is_com_section (asect))
6435 sec_index = SHN_COMMON;
6436 else if (bfd_is_und_section (asect))
6437 sec_index = SHN_UNDEF;
6439 sec_index = SHN_BAD;
6441 bed = get_elf_backend_data (abfd);
6442 if (bed->elf_backend_section_from_bfd_section)
6444 int retval = sec_index;
6446 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
6450 if (sec_index == SHN_BAD)
6451 bfd_set_error (bfd_error_nonrepresentable_section);
6456 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
6460 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
6462 asymbol *asym_ptr = *asym_ptr_ptr;
6464 flagword flags = asym_ptr->flags;
6466 /* When gas creates relocations against local labels, it creates its
6467 own symbol for the section, but does put the symbol into the
6468 symbol chain, so udata is 0. When the linker is generating
6469 relocatable output, this section symbol may be for one of the
6470 input sections rather than the output section. */
6471 if (asym_ptr->udata.i == 0
6472 && (flags & BSF_SECTION_SYM)
6473 && asym_ptr->section)
6478 sec = asym_ptr->section;
6479 if (sec->owner != abfd && sec->output_section != NULL)
6480 sec = sec->output_section;
6481 if (sec->owner == abfd
6482 && (indx = sec->index) < elf_num_section_syms (abfd)
6483 && elf_section_syms (abfd)[indx] != NULL)
6484 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
6487 idx = asym_ptr->udata.i;
6491 /* This case can occur when using --strip-symbol on a symbol
6492 which is used in a relocation entry. */
6494 /* xgettext:c-format */
6495 (_("%pB: symbol `%s' required but not present"),
6496 abfd, bfd_asymbol_name (asym_ptr));
6497 bfd_set_error (bfd_error_no_symbols);
6504 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8x\n",
6505 (long) asym_ptr, asym_ptr->name, idx, flags);
6513 /* Rewrite program header information. */
6516 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
6518 Elf_Internal_Ehdr *iehdr;
6519 struct elf_segment_map *map;
6520 struct elf_segment_map *map_first;
6521 struct elf_segment_map **pointer_to_map;
6522 Elf_Internal_Phdr *segment;
6525 unsigned int num_segments;
6526 bfd_boolean phdr_included = FALSE;
6527 bfd_boolean p_paddr_valid;
6528 bfd_vma maxpagesize;
6529 struct elf_segment_map *phdr_adjust_seg = NULL;
6530 unsigned int phdr_adjust_num = 0;
6531 const struct elf_backend_data *bed;
6533 bed = get_elf_backend_data (ibfd);
6534 iehdr = elf_elfheader (ibfd);
6537 pointer_to_map = &map_first;
6539 num_segments = elf_elfheader (ibfd)->e_phnum;
6540 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
6542 /* Returns the end address of the segment + 1. */
6543 #define SEGMENT_END(segment, start) \
6544 (start + (segment->p_memsz > segment->p_filesz \
6545 ? segment->p_memsz : segment->p_filesz))
6547 #define SECTION_SIZE(section, segment) \
6548 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
6549 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
6550 ? section->size : 0)
6552 /* Returns TRUE if the given section is contained within
6553 the given segment. VMA addresses are compared. */
6554 #define IS_CONTAINED_BY_VMA(section, segment) \
6555 (section->vma >= segment->p_vaddr \
6556 && (section->vma + SECTION_SIZE (section, segment) \
6557 <= (SEGMENT_END (segment, segment->p_vaddr))))
6559 /* Returns TRUE if the given section is contained within
6560 the given segment. LMA addresses are compared. */
6561 #define IS_CONTAINED_BY_LMA(section, segment, base) \
6562 (section->lma >= base \
6563 && (section->lma + SECTION_SIZE (section, segment) \
6564 <= SEGMENT_END (segment, base)))
6566 /* Handle PT_NOTE segment. */
6567 #define IS_NOTE(p, s) \
6568 (p->p_type == PT_NOTE \
6569 && elf_section_type (s) == SHT_NOTE \
6570 && (bfd_vma) s->filepos >= p->p_offset \
6571 && ((bfd_vma) s->filepos + s->size \
6572 <= p->p_offset + p->p_filesz))
6574 /* Special case: corefile "NOTE" section containing regs, prpsinfo
6576 #define IS_COREFILE_NOTE(p, s) \
6578 && bfd_get_format (ibfd) == bfd_core \
6582 /* The complicated case when p_vaddr is 0 is to handle the Solaris
6583 linker, which generates a PT_INTERP section with p_vaddr and
6584 p_memsz set to 0. */
6585 #define IS_SOLARIS_PT_INTERP(p, s) \
6587 && p->p_paddr == 0 \
6588 && p->p_memsz == 0 \
6589 && p->p_filesz > 0 \
6590 && (s->flags & SEC_HAS_CONTENTS) != 0 \
6592 && (bfd_vma) s->filepos >= p->p_offset \
6593 && ((bfd_vma) s->filepos + s->size \
6594 <= p->p_offset + p->p_filesz))
6596 /* Decide if the given section should be included in the given segment.
6597 A section will be included if:
6598 1. It is within the address space of the segment -- we use the LMA
6599 if that is set for the segment and the VMA otherwise,
6600 2. It is an allocated section or a NOTE section in a PT_NOTE
6602 3. There is an output section associated with it,
6603 4. The section has not already been allocated to a previous segment.
6604 5. PT_GNU_STACK segments do not include any sections.
6605 6. PT_TLS segment includes only SHF_TLS sections.
6606 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
6607 8. PT_DYNAMIC should not contain empty sections at the beginning
6608 (with the possible exception of .dynamic). */
6609 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
6610 ((((segment->p_paddr \
6611 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
6612 : IS_CONTAINED_BY_VMA (section, segment)) \
6613 && (section->flags & SEC_ALLOC) != 0) \
6614 || IS_NOTE (segment, section)) \
6615 && segment->p_type != PT_GNU_STACK \
6616 && (segment->p_type != PT_TLS \
6617 || (section->flags & SEC_THREAD_LOCAL)) \
6618 && (segment->p_type == PT_LOAD \
6619 || segment->p_type == PT_TLS \
6620 || (section->flags & SEC_THREAD_LOCAL) == 0) \
6621 && (segment->p_type != PT_DYNAMIC \
6622 || SECTION_SIZE (section, segment) > 0 \
6623 || (segment->p_paddr \
6624 ? segment->p_paddr != section->lma \
6625 : segment->p_vaddr != section->vma) \
6626 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
6628 && !section->segment_mark)
6630 /* If the output section of a section in the input segment is NULL,
6631 it is removed from the corresponding output segment. */
6632 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
6633 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
6634 && section->output_section != NULL)
6636 /* Returns TRUE iff seg1 starts after the end of seg2. */
6637 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
6638 (seg1->field >= SEGMENT_END (seg2, seg2->field))
6640 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
6641 their VMA address ranges and their LMA address ranges overlap.
6642 It is possible to have overlapping VMA ranges without overlapping LMA
6643 ranges. RedBoot images for example can have both .data and .bss mapped
6644 to the same VMA range, but with the .data section mapped to a different
6646 #define SEGMENT_OVERLAPS(seg1, seg2) \
6647 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
6648 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
6649 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
6650 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
6652 /* Initialise the segment mark field. */
6653 for (section = ibfd->sections; section != NULL; section = section->next)
6654 section->segment_mark = FALSE;
6656 /* The Solaris linker creates program headers in which all the
6657 p_paddr fields are zero. When we try to objcopy or strip such a
6658 file, we get confused. Check for this case, and if we find it
6659 don't set the p_paddr_valid fields. */
6660 p_paddr_valid = FALSE;
6661 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6664 if (segment->p_paddr != 0)
6666 p_paddr_valid = TRUE;
6670 /* Scan through the segments specified in the program header
6671 of the input BFD. For this first scan we look for overlaps
6672 in the loadable segments. These can be created by weird
6673 parameters to objcopy. Also, fix some solaris weirdness. */
6674 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6679 Elf_Internal_Phdr *segment2;
6681 if (segment->p_type == PT_INTERP)
6682 for (section = ibfd->sections; section; section = section->next)
6683 if (IS_SOLARIS_PT_INTERP (segment, section))
6685 /* Mininal change so that the normal section to segment
6686 assignment code will work. */
6687 segment->p_vaddr = section->vma;
6691 if (segment->p_type != PT_LOAD)
6693 /* Remove PT_GNU_RELRO segment. */
6694 if (segment->p_type == PT_GNU_RELRO)
6695 segment->p_type = PT_NULL;
6699 /* Determine if this segment overlaps any previous segments. */
6700 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++)
6702 bfd_signed_vma extra_length;
6704 if (segment2->p_type != PT_LOAD
6705 || !SEGMENT_OVERLAPS (segment, segment2))
6708 /* Merge the two segments together. */
6709 if (segment2->p_vaddr < segment->p_vaddr)
6711 /* Extend SEGMENT2 to include SEGMENT and then delete
6713 extra_length = (SEGMENT_END (segment, segment->p_vaddr)
6714 - SEGMENT_END (segment2, segment2->p_vaddr));
6716 if (extra_length > 0)
6718 segment2->p_memsz += extra_length;
6719 segment2->p_filesz += extra_length;
6722 segment->p_type = PT_NULL;
6724 /* Since we have deleted P we must restart the outer loop. */
6726 segment = elf_tdata (ibfd)->phdr;
6731 /* Extend SEGMENT to include SEGMENT2 and then delete
6733 extra_length = (SEGMENT_END (segment2, segment2->p_vaddr)
6734 - SEGMENT_END (segment, segment->p_vaddr));
6736 if (extra_length > 0)
6738 segment->p_memsz += extra_length;
6739 segment->p_filesz += extra_length;
6742 segment2->p_type = PT_NULL;
6747 /* The second scan attempts to assign sections to segments. */
6748 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6752 unsigned int section_count;
6753 asection **sections;
6754 asection *output_section;
6756 bfd_vma matching_lma;
6757 bfd_vma suggested_lma;
6760 asection *first_section;
6761 bfd_boolean first_matching_lma;
6762 bfd_boolean first_suggested_lma;
6764 if (segment->p_type == PT_NULL)
6767 first_section = NULL;
6768 /* Compute how many sections might be placed into this segment. */
6769 for (section = ibfd->sections, section_count = 0;
6771 section = section->next)
6773 /* Find the first section in the input segment, which may be
6774 removed from the corresponding output segment. */
6775 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
6777 if (first_section == NULL)
6778 first_section = section;
6779 if (section->output_section != NULL)
6784 /* Allocate a segment map big enough to contain
6785 all of the sections we have selected. */
6786 amt = sizeof (struct elf_segment_map);
6787 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
6788 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
6792 /* Initialise the fields of the segment map. Default to
6793 using the physical address of the segment in the input BFD. */
6795 map->p_type = segment->p_type;
6796 map->p_flags = segment->p_flags;
6797 map->p_flags_valid = 1;
6799 /* If the first section in the input segment is removed, there is
6800 no need to preserve segment physical address in the corresponding
6802 if (!first_section || first_section->output_section != NULL)
6804 map->p_paddr = segment->p_paddr;
6805 map->p_paddr_valid = p_paddr_valid;
6808 /* Determine if this segment contains the ELF file header
6809 and if it contains the program headers themselves. */
6810 map->includes_filehdr = (segment->p_offset == 0
6811 && segment->p_filesz >= iehdr->e_ehsize);
6812 map->includes_phdrs = 0;
6814 if (!phdr_included || segment->p_type != PT_LOAD)
6816 map->includes_phdrs =
6817 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
6818 && (segment->p_offset + segment->p_filesz
6819 >= ((bfd_vma) iehdr->e_phoff
6820 + iehdr->e_phnum * iehdr->e_phentsize)));
6822 if (segment->p_type == PT_LOAD && map->includes_phdrs)
6823 phdr_included = TRUE;
6826 if (section_count == 0)
6828 /* Special segments, such as the PT_PHDR segment, may contain
6829 no sections, but ordinary, loadable segments should contain
6830 something. They are allowed by the ELF spec however, so only
6831 a warning is produced.
6832 There is however the valid use case of embedded systems which
6833 have segments with p_filesz of 0 and a p_memsz > 0 to initialize
6834 flash memory with zeros. No warning is shown for that case. */
6835 if (segment->p_type == PT_LOAD
6836 && (segment->p_filesz > 0 || segment->p_memsz == 0))
6837 /* xgettext:c-format */
6838 _bfd_error_handler (_("%pB: warning: Empty loadable segment detected"
6839 " at vaddr=%#Lx, is this intentional?"),
6840 ibfd, segment->p_vaddr);
6843 *pointer_to_map = map;
6844 pointer_to_map = &map->next;
6849 /* Now scan the sections in the input BFD again and attempt
6850 to add their corresponding output sections to the segment map.
6851 The problem here is how to handle an output section which has
6852 been moved (ie had its LMA changed). There are four possibilities:
6854 1. None of the sections have been moved.
6855 In this case we can continue to use the segment LMA from the
6858 2. All of the sections have been moved by the same amount.
6859 In this case we can change the segment's LMA to match the LMA
6860 of the first section.
6862 3. Some of the sections have been moved, others have not.
6863 In this case those sections which have not been moved can be
6864 placed in the current segment which will have to have its size,
6865 and possibly its LMA changed, and a new segment or segments will
6866 have to be created to contain the other sections.
6868 4. The sections have been moved, but not by the same amount.
6869 In this case we can change the segment's LMA to match the LMA
6870 of the first section and we will have to create a new segment
6871 or segments to contain the other sections.
6873 In order to save time, we allocate an array to hold the section
6874 pointers that we are interested in. As these sections get assigned
6875 to a segment, they are removed from this array. */
6877 sections = (asection **) bfd_malloc2 (section_count, sizeof (asection *));
6878 if (sections == NULL)
6881 /* Step One: Scan for segment vs section LMA conflicts.
6882 Also add the sections to the section array allocated above.
6883 Also add the sections to the current segment. In the common
6884 case, where the sections have not been moved, this means that
6885 we have completely filled the segment, and there is nothing
6890 first_matching_lma = TRUE;
6891 first_suggested_lma = TRUE;
6893 for (section = first_section, j = 0;
6895 section = section->next)
6897 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
6899 output_section = section->output_section;
6901 sections[j++] = section;
6903 /* The Solaris native linker always sets p_paddr to 0.
6904 We try to catch that case here, and set it to the
6905 correct value. Note - some backends require that
6906 p_paddr be left as zero. */
6908 && segment->p_vaddr != 0
6909 && !bed->want_p_paddr_set_to_zero
6911 && output_section->lma != 0
6912 && output_section->vma == (segment->p_vaddr
6913 + (map->includes_filehdr
6916 + (map->includes_phdrs
6918 * iehdr->e_phentsize)
6920 map->p_paddr = segment->p_vaddr;
6922 /* Match up the physical address of the segment with the
6923 LMA address of the output section. */
6924 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
6925 || IS_COREFILE_NOTE (segment, section)
6926 || (bed->want_p_paddr_set_to_zero
6927 && IS_CONTAINED_BY_VMA (output_section, segment)))
6929 if (first_matching_lma || output_section->lma < matching_lma)
6931 matching_lma = output_section->lma;
6932 first_matching_lma = FALSE;
6935 /* We assume that if the section fits within the segment
6936 then it does not overlap any other section within that
6938 map->sections[isec++] = output_section;
6940 else if (first_suggested_lma)
6942 suggested_lma = output_section->lma;
6943 first_suggested_lma = FALSE;
6946 if (j == section_count)
6951 BFD_ASSERT (j == section_count);
6953 /* Step Two: Adjust the physical address of the current segment,
6955 if (isec == section_count)
6957 /* All of the sections fitted within the segment as currently
6958 specified. This is the default case. Add the segment to
6959 the list of built segments and carry on to process the next
6960 program header in the input BFD. */
6961 map->count = section_count;
6962 *pointer_to_map = map;
6963 pointer_to_map = &map->next;
6966 && !bed->want_p_paddr_set_to_zero
6967 && matching_lma != map->p_paddr
6968 && !map->includes_filehdr
6969 && !map->includes_phdrs)
6970 /* There is some padding before the first section in the
6971 segment. So, we must account for that in the output
6973 map->p_vaddr_offset = matching_lma - map->p_paddr;
6980 if (!first_matching_lma)
6982 /* At least one section fits inside the current segment.
6983 Keep it, but modify its physical address to match the
6984 LMA of the first section that fitted. */
6985 map->p_paddr = matching_lma;
6989 /* None of the sections fitted inside the current segment.
6990 Change the current segment's physical address to match
6991 the LMA of the first section. */
6992 map->p_paddr = suggested_lma;
6995 /* Offset the segment physical address from the lma
6996 to allow for space taken up by elf headers. */
6997 if (map->includes_filehdr)
6999 if (map->p_paddr >= iehdr->e_ehsize)
7000 map->p_paddr -= iehdr->e_ehsize;
7003 map->includes_filehdr = FALSE;
7004 map->includes_phdrs = FALSE;
7008 if (map->includes_phdrs)
7010 if (map->p_paddr >= iehdr->e_phnum * iehdr->e_phentsize)
7012 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
7014 /* iehdr->e_phnum is just an estimate of the number
7015 of program headers that we will need. Make a note
7016 here of the number we used and the segment we chose
7017 to hold these headers, so that we can adjust the
7018 offset when we know the correct value. */
7019 phdr_adjust_num = iehdr->e_phnum;
7020 phdr_adjust_seg = map;
7023 map->includes_phdrs = FALSE;
7027 /* Step Three: Loop over the sections again, this time assigning
7028 those that fit to the current segment and removing them from the
7029 sections array; but making sure not to leave large gaps. Once all
7030 possible sections have been assigned to the current segment it is
7031 added to the list of built segments and if sections still remain
7032 to be assigned, a new segment is constructed before repeating
7039 first_suggested_lma = TRUE;
7041 /* Fill the current segment with sections that fit. */
7042 for (j = 0; j < section_count; j++)
7044 section = sections[j];
7046 if (section == NULL)
7049 output_section = section->output_section;
7051 BFD_ASSERT (output_section != NULL);
7053 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
7054 || IS_COREFILE_NOTE (segment, section))
7056 if (map->count == 0)
7058 /* If the first section in a segment does not start at
7059 the beginning of the segment, then something is
7061 if (output_section->lma
7063 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
7064 + (map->includes_phdrs
7065 ? iehdr->e_phnum * iehdr->e_phentsize
7073 prev_sec = map->sections[map->count - 1];
7075 /* If the gap between the end of the previous section
7076 and the start of this section is more than
7077 maxpagesize then we need to start a new segment. */
7078 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
7080 < BFD_ALIGN (output_section->lma, maxpagesize))
7081 || (prev_sec->lma + prev_sec->size
7082 > output_section->lma))
7084 if (first_suggested_lma)
7086 suggested_lma = output_section->lma;
7087 first_suggested_lma = FALSE;
7094 map->sections[map->count++] = output_section;
7097 section->segment_mark = TRUE;
7099 else if (first_suggested_lma)
7101 suggested_lma = output_section->lma;
7102 first_suggested_lma = FALSE;
7106 BFD_ASSERT (map->count > 0);
7108 /* Add the current segment to the list of built segments. */
7109 *pointer_to_map = map;
7110 pointer_to_map = &map->next;
7112 if (isec < section_count)
7114 /* We still have not allocated all of the sections to
7115 segments. Create a new segment here, initialise it
7116 and carry on looping. */
7117 amt = sizeof (struct elf_segment_map);
7118 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
7119 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
7126 /* Initialise the fields of the segment map. Set the physical
7127 physical address to the LMA of the first section that has
7128 not yet been assigned. */
7130 map->p_type = segment->p_type;
7131 map->p_flags = segment->p_flags;
7132 map->p_flags_valid = 1;
7133 map->p_paddr = suggested_lma;
7134 map->p_paddr_valid = p_paddr_valid;
7135 map->includes_filehdr = 0;
7136 map->includes_phdrs = 0;
7139 while (isec < section_count);
7144 elf_seg_map (obfd) = map_first;
7146 /* If we had to estimate the number of program headers that were
7147 going to be needed, then check our estimate now and adjust
7148 the offset if necessary. */
7149 if (phdr_adjust_seg != NULL)
7153 for (count = 0, map = map_first; map != NULL; map = map->next)
7156 if (count > phdr_adjust_num)
7157 phdr_adjust_seg->p_paddr
7158 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
7163 #undef IS_CONTAINED_BY_VMA
7164 #undef IS_CONTAINED_BY_LMA
7166 #undef IS_COREFILE_NOTE
7167 #undef IS_SOLARIS_PT_INTERP
7168 #undef IS_SECTION_IN_INPUT_SEGMENT
7169 #undef INCLUDE_SECTION_IN_SEGMENT
7170 #undef SEGMENT_AFTER_SEGMENT
7171 #undef SEGMENT_OVERLAPS
7175 /* Copy ELF program header information. */
7178 copy_elf_program_header (bfd *ibfd, bfd *obfd)
7180 Elf_Internal_Ehdr *iehdr;
7181 struct elf_segment_map *map;
7182 struct elf_segment_map *map_first;
7183 struct elf_segment_map **pointer_to_map;
7184 Elf_Internal_Phdr *segment;
7186 unsigned int num_segments;
7187 bfd_boolean phdr_included = FALSE;
7188 bfd_boolean p_paddr_valid;
7190 iehdr = elf_elfheader (ibfd);
7193 pointer_to_map = &map_first;
7195 /* If all the segment p_paddr fields are zero, don't set
7196 map->p_paddr_valid. */
7197 p_paddr_valid = FALSE;
7198 num_segments = elf_elfheader (ibfd)->e_phnum;
7199 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7202 if (segment->p_paddr != 0)
7204 p_paddr_valid = TRUE;
7208 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7213 unsigned int section_count;
7215 Elf_Internal_Shdr *this_hdr;
7216 asection *first_section = NULL;
7217 asection *lowest_section;
7219 /* Compute how many sections are in this segment. */
7220 for (section = ibfd->sections, section_count = 0;
7222 section = section->next)
7224 this_hdr = &(elf_section_data(section)->this_hdr);
7225 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7227 if (first_section == NULL)
7228 first_section = section;
7233 /* Allocate a segment map big enough to contain
7234 all of the sections we have selected. */
7235 amt = sizeof (struct elf_segment_map);
7236 if (section_count != 0)
7237 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
7238 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
7242 /* Initialize the fields of the output segment map with the
7245 map->p_type = segment->p_type;
7246 map->p_flags = segment->p_flags;
7247 map->p_flags_valid = 1;
7248 map->p_paddr = segment->p_paddr;
7249 map->p_paddr_valid = p_paddr_valid;
7250 map->p_align = segment->p_align;
7251 map->p_align_valid = 1;
7252 map->p_vaddr_offset = 0;
7254 if (map->p_type == PT_GNU_RELRO
7255 || map->p_type == PT_GNU_STACK)
7257 /* The PT_GNU_RELRO segment may contain the first a few
7258 bytes in the .got.plt section even if the whole .got.plt
7259 section isn't in the PT_GNU_RELRO segment. We won't
7260 change the size of the PT_GNU_RELRO segment.
7261 Similarly, PT_GNU_STACK size is significant on uclinux
7263 map->p_size = segment->p_memsz;
7264 map->p_size_valid = 1;
7267 /* Determine if this segment contains the ELF file header
7268 and if it contains the program headers themselves. */
7269 map->includes_filehdr = (segment->p_offset == 0
7270 && segment->p_filesz >= iehdr->e_ehsize);
7272 map->includes_phdrs = 0;
7273 if (! phdr_included || segment->p_type != PT_LOAD)
7275 map->includes_phdrs =
7276 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
7277 && (segment->p_offset + segment->p_filesz
7278 >= ((bfd_vma) iehdr->e_phoff
7279 + iehdr->e_phnum * iehdr->e_phentsize)));
7281 if (segment->p_type == PT_LOAD && map->includes_phdrs)
7282 phdr_included = TRUE;
7285 lowest_section = NULL;
7286 if (section_count != 0)
7288 unsigned int isec = 0;
7290 for (section = first_section;
7292 section = section->next)
7294 this_hdr = &(elf_section_data(section)->this_hdr);
7295 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7297 map->sections[isec++] = section->output_section;
7298 if ((section->flags & SEC_ALLOC) != 0)
7302 if (lowest_section == NULL
7303 || section->lma < lowest_section->lma)
7304 lowest_section = section;
7306 /* Section lmas are set up from PT_LOAD header
7307 p_paddr in _bfd_elf_make_section_from_shdr.
7308 If this header has a p_paddr that disagrees
7309 with the section lma, flag the p_paddr as
7311 if ((section->flags & SEC_LOAD) != 0)
7312 seg_off = this_hdr->sh_offset - segment->p_offset;
7314 seg_off = this_hdr->sh_addr - segment->p_vaddr;
7315 if (section->lma - segment->p_paddr != seg_off)
7316 map->p_paddr_valid = FALSE;
7318 if (isec == section_count)
7324 if (map->includes_filehdr && lowest_section != NULL)
7325 /* We need to keep the space used by the headers fixed. */
7326 map->header_size = lowest_section->vma - segment->p_vaddr;
7328 if (!map->includes_phdrs
7329 && !map->includes_filehdr
7330 && map->p_paddr_valid)
7331 /* There is some other padding before the first section. */
7332 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
7333 - segment->p_paddr);
7335 map->count = section_count;
7336 *pointer_to_map = map;
7337 pointer_to_map = &map->next;
7340 elf_seg_map (obfd) = map_first;
7344 /* Copy private BFD data. This copies or rewrites ELF program header
7348 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
7350 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7351 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7354 if (elf_tdata (ibfd)->phdr == NULL)
7357 if (ibfd->xvec == obfd->xvec)
7359 /* Check to see if any sections in the input BFD
7360 covered by ELF program header have changed. */
7361 Elf_Internal_Phdr *segment;
7362 asection *section, *osec;
7363 unsigned int i, num_segments;
7364 Elf_Internal_Shdr *this_hdr;
7365 const struct elf_backend_data *bed;
7367 bed = get_elf_backend_data (ibfd);
7369 /* Regenerate the segment map if p_paddr is set to 0. */
7370 if (bed->want_p_paddr_set_to_zero)
7373 /* Initialize the segment mark field. */
7374 for (section = obfd->sections; section != NULL;
7375 section = section->next)
7376 section->segment_mark = FALSE;
7378 num_segments = elf_elfheader (ibfd)->e_phnum;
7379 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7383 /* PR binutils/3535. The Solaris linker always sets the p_paddr
7384 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
7385 which severly confuses things, so always regenerate the segment
7386 map in this case. */
7387 if (segment->p_paddr == 0
7388 && segment->p_memsz == 0
7389 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
7392 for (section = ibfd->sections;
7393 section != NULL; section = section->next)
7395 /* We mark the output section so that we know it comes
7396 from the input BFD. */
7397 osec = section->output_section;
7399 osec->segment_mark = TRUE;
7401 /* Check if this section is covered by the segment. */
7402 this_hdr = &(elf_section_data(section)->this_hdr);
7403 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7405 /* FIXME: Check if its output section is changed or
7406 removed. What else do we need to check? */
7408 || section->flags != osec->flags
7409 || section->lma != osec->lma
7410 || section->vma != osec->vma
7411 || section->size != osec->size
7412 || section->rawsize != osec->rawsize
7413 || section->alignment_power != osec->alignment_power)
7419 /* Check to see if any output section do not come from the
7421 for (section = obfd->sections; section != NULL;
7422 section = section->next)
7424 if (!section->segment_mark)
7427 section->segment_mark = FALSE;
7430 return copy_elf_program_header (ibfd, obfd);
7434 if (ibfd->xvec == obfd->xvec)
7436 /* When rewriting program header, set the output maxpagesize to
7437 the maximum alignment of input PT_LOAD segments. */
7438 Elf_Internal_Phdr *segment;
7440 unsigned int num_segments = elf_elfheader (ibfd)->e_phnum;
7441 bfd_vma maxpagesize = 0;
7443 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7446 if (segment->p_type == PT_LOAD
7447 && maxpagesize < segment->p_align)
7449 /* PR 17512: file: f17299af. */
7450 if (segment->p_align > (bfd_vma) 1 << ((sizeof (bfd_vma) * 8) - 2))
7451 /* xgettext:c-format */
7452 _bfd_error_handler (_("%pB: warning: segment alignment of %#Lx"
7454 ibfd, segment->p_align);
7456 maxpagesize = segment->p_align;
7459 if (maxpagesize != get_elf_backend_data (obfd)->maxpagesize)
7460 bfd_emul_set_maxpagesize (bfd_get_target (obfd), maxpagesize);
7463 return rewrite_elf_program_header (ibfd, obfd);
7466 /* Initialize private output section information from input section. */
7469 _bfd_elf_init_private_section_data (bfd *ibfd,
7473 struct bfd_link_info *link_info)
7476 Elf_Internal_Shdr *ihdr, *ohdr;
7477 bfd_boolean final_link = (link_info != NULL
7478 && !bfd_link_relocatable (link_info));
7480 if (ibfd->xvec->flavour != bfd_target_elf_flavour
7481 || obfd->xvec->flavour != bfd_target_elf_flavour)
7484 BFD_ASSERT (elf_section_data (osec) != NULL);
7486 /* For objcopy and relocatable link, don't copy the output ELF
7487 section type from input if the output BFD section flags have been
7488 set to something different. For a final link allow some flags
7489 that the linker clears to differ. */
7490 if (elf_section_type (osec) == SHT_NULL
7491 && (osec->flags == isec->flags
7493 && ((osec->flags ^ isec->flags)
7494 & ~(SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_RELOC)) == 0)))
7495 elf_section_type (osec) = elf_section_type (isec);
7497 /* FIXME: Is this correct for all OS/PROC specific flags? */
7498 elf_section_flags (osec) |= (elf_section_flags (isec)
7499 & (SHF_MASKOS | SHF_MASKPROC));
7501 /* Copy sh_info from input for mbind section. */
7502 if (elf_section_flags (isec) & SHF_GNU_MBIND)
7503 elf_section_data (osec)->this_hdr.sh_info
7504 = elf_section_data (isec)->this_hdr.sh_info;
7506 /* Set things up for objcopy and relocatable link. The output
7507 SHT_GROUP section will have its elf_next_in_group pointing back
7508 to the input group members. Ignore linker created group section.
7509 See elfNN_ia64_object_p in elfxx-ia64.c. */
7510 if ((link_info == NULL
7511 || !link_info->resolve_section_groups)
7512 && (elf_sec_group (isec) == NULL
7513 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0))
7515 if (elf_section_flags (isec) & SHF_GROUP)
7516 elf_section_flags (osec) |= SHF_GROUP;
7517 elf_next_in_group (osec) = elf_next_in_group (isec);
7518 elf_section_data (osec)->group = elf_section_data (isec)->group;
7521 /* If not decompress, preserve SHF_COMPRESSED. */
7522 if (!final_link && (ibfd->flags & BFD_DECOMPRESS) == 0)
7523 elf_section_flags (osec) |= (elf_section_flags (isec)
7526 ihdr = &elf_section_data (isec)->this_hdr;
7528 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
7529 don't use the output section of the linked-to section since it
7530 may be NULL at this point. */
7531 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
7533 ohdr = &elf_section_data (osec)->this_hdr;
7534 ohdr->sh_flags |= SHF_LINK_ORDER;
7535 elf_linked_to_section (osec) = elf_linked_to_section (isec);
7538 osec->use_rela_p = isec->use_rela_p;
7543 /* Copy private section information. This copies over the entsize
7544 field, and sometimes the info field. */
7547 _bfd_elf_copy_private_section_data (bfd *ibfd,
7552 Elf_Internal_Shdr *ihdr, *ohdr;
7554 if (ibfd->xvec->flavour != bfd_target_elf_flavour
7555 || obfd->xvec->flavour != bfd_target_elf_flavour)
7558 ihdr = &elf_section_data (isec)->this_hdr;
7559 ohdr = &elf_section_data (osec)->this_hdr;
7561 ohdr->sh_entsize = ihdr->sh_entsize;
7563 if (ihdr->sh_type == SHT_SYMTAB
7564 || ihdr->sh_type == SHT_DYNSYM
7565 || ihdr->sh_type == SHT_GNU_verneed
7566 || ihdr->sh_type == SHT_GNU_verdef)
7567 ohdr->sh_info = ihdr->sh_info;
7569 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
7573 /* Look at all the SHT_GROUP sections in IBFD, making any adjustments
7574 necessary if we are removing either the SHT_GROUP section or any of
7575 the group member sections. DISCARDED is the value that a section's
7576 output_section has if the section will be discarded, NULL when this
7577 function is called from objcopy, bfd_abs_section_ptr when called
7581 _bfd_elf_fixup_group_sections (bfd *ibfd, asection *discarded)
7585 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
7586 if (elf_section_type (isec) == SHT_GROUP)
7588 asection *first = elf_next_in_group (isec);
7589 asection *s = first;
7590 bfd_size_type removed = 0;
7594 /* If this member section is being output but the
7595 SHT_GROUP section is not, then clear the group info
7596 set up by _bfd_elf_copy_private_section_data. */
7597 if (s->output_section != discarded
7598 && isec->output_section == discarded)
7600 elf_section_flags (s->output_section) &= ~SHF_GROUP;
7601 elf_group_name (s->output_section) = NULL;
7603 /* Conversely, if the member section is not being output
7604 but the SHT_GROUP section is, then adjust its size. */
7605 else if (s->output_section == discarded
7606 && isec->output_section != discarded)
7608 struct bfd_elf_section_data *elf_sec = elf_section_data (s);
7610 if (elf_sec->rel.hdr != NULL
7611 && (elf_sec->rel.hdr->sh_flags & SHF_GROUP) != 0)
7613 if (elf_sec->rela.hdr != NULL
7614 && (elf_sec->rela.hdr->sh_flags & SHF_GROUP) != 0)
7617 s = elf_next_in_group (s);
7623 if (discarded != NULL)
7625 /* If we've been called for ld -r, then we need to
7626 adjust the input section size. */
7627 if (isec->rawsize == 0)
7628 isec->rawsize = isec->size;
7629 isec->size = isec->rawsize - removed;
7630 if (isec->size <= 4)
7633 isec->flags |= SEC_EXCLUDE;
7638 /* Adjust the output section size when called from
7640 isec->output_section->size -= removed;
7641 if (isec->output_section->size <= 4)
7643 isec->output_section->size = 0;
7644 isec->output_section->flags |= SEC_EXCLUDE;
7653 /* Copy private header information. */
7656 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
7658 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7659 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7662 /* Copy over private BFD data if it has not already been copied.
7663 This must be done here, rather than in the copy_private_bfd_data
7664 entry point, because the latter is called after the section
7665 contents have been set, which means that the program headers have
7666 already been worked out. */
7667 if (elf_seg_map (obfd) == NULL && elf_tdata (ibfd)->phdr != NULL)
7669 if (! copy_private_bfd_data (ibfd, obfd))
7673 return _bfd_elf_fixup_group_sections (ibfd, NULL);
7676 /* Copy private symbol information. If this symbol is in a section
7677 which we did not map into a BFD section, try to map the section
7678 index correctly. We use special macro definitions for the mapped
7679 section indices; these definitions are interpreted by the
7680 swap_out_syms function. */
7682 #define MAP_ONESYMTAB (SHN_HIOS + 1)
7683 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
7684 #define MAP_STRTAB (SHN_HIOS + 3)
7685 #define MAP_SHSTRTAB (SHN_HIOS + 4)
7686 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
7689 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
7694 elf_symbol_type *isym, *osym;
7696 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7697 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7700 isym = elf_symbol_from (ibfd, isymarg);
7701 osym = elf_symbol_from (obfd, osymarg);
7704 && isym->internal_elf_sym.st_shndx != 0
7706 && bfd_is_abs_section (isym->symbol.section))
7710 shndx = isym->internal_elf_sym.st_shndx;
7711 if (shndx == elf_onesymtab (ibfd))
7712 shndx = MAP_ONESYMTAB;
7713 else if (shndx == elf_dynsymtab (ibfd))
7714 shndx = MAP_DYNSYMTAB;
7715 else if (shndx == elf_strtab_sec (ibfd))
7717 else if (shndx == elf_shstrtab_sec (ibfd))
7718 shndx = MAP_SHSTRTAB;
7719 else if (find_section_in_list (shndx, elf_symtab_shndx_list (ibfd)))
7720 shndx = MAP_SYM_SHNDX;
7721 osym->internal_elf_sym.st_shndx = shndx;
7727 /* Swap out the symbols. */
7730 swap_out_syms (bfd *abfd,
7731 struct elf_strtab_hash **sttp,
7734 const struct elf_backend_data *bed;
7737 struct elf_strtab_hash *stt;
7738 Elf_Internal_Shdr *symtab_hdr;
7739 Elf_Internal_Shdr *symtab_shndx_hdr;
7740 Elf_Internal_Shdr *symstrtab_hdr;
7741 struct elf_sym_strtab *symstrtab;
7742 bfd_byte *outbound_syms;
7743 bfd_byte *outbound_shndx;
7744 unsigned long outbound_syms_index;
7745 unsigned long outbound_shndx_index;
7747 unsigned int num_locals;
7749 bfd_boolean name_local_sections;
7751 if (!elf_map_symbols (abfd, &num_locals))
7754 /* Dump out the symtabs. */
7755 stt = _bfd_elf_strtab_init ();
7759 bed = get_elf_backend_data (abfd);
7760 symcount = bfd_get_symcount (abfd);
7761 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7762 symtab_hdr->sh_type = SHT_SYMTAB;
7763 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
7764 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
7765 symtab_hdr->sh_info = num_locals + 1;
7766 symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
7768 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
7769 symstrtab_hdr->sh_type = SHT_STRTAB;
7771 /* Allocate buffer to swap out the .strtab section. */
7772 symstrtab = (struct elf_sym_strtab *) bfd_malloc ((symcount + 1)
7773 * sizeof (*symstrtab));
7774 if (symstrtab == NULL)
7776 _bfd_elf_strtab_free (stt);
7780 outbound_syms = (bfd_byte *) bfd_alloc2 (abfd, 1 + symcount,
7781 bed->s->sizeof_sym);
7782 if (outbound_syms == NULL)
7785 _bfd_elf_strtab_free (stt);
7789 symtab_hdr->contents = outbound_syms;
7790 outbound_syms_index = 0;
7792 outbound_shndx = NULL;
7793 outbound_shndx_index = 0;
7795 if (elf_symtab_shndx_list (abfd))
7797 symtab_shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr;
7798 if (symtab_shndx_hdr->sh_name != 0)
7800 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
7801 outbound_shndx = (bfd_byte *)
7802 bfd_zalloc2 (abfd, 1 + symcount, sizeof (Elf_External_Sym_Shndx));
7803 if (outbound_shndx == NULL)
7806 symtab_shndx_hdr->contents = outbound_shndx;
7807 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
7808 symtab_shndx_hdr->sh_size = amt;
7809 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
7810 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
7812 /* FIXME: What about any other headers in the list ? */
7815 /* Now generate the data (for "contents"). */
7817 /* Fill in zeroth symbol and swap it out. */
7818 Elf_Internal_Sym sym;
7824 sym.st_shndx = SHN_UNDEF;
7825 sym.st_target_internal = 0;
7826 symstrtab[0].sym = sym;
7827 symstrtab[0].dest_index = outbound_syms_index;
7828 symstrtab[0].destshndx_index = outbound_shndx_index;
7829 outbound_syms_index++;
7830 if (outbound_shndx != NULL)
7831 outbound_shndx_index++;
7835 = (bed->elf_backend_name_local_section_symbols
7836 && bed->elf_backend_name_local_section_symbols (abfd));
7838 syms = bfd_get_outsymbols (abfd);
7839 for (idx = 0; idx < symcount;)
7841 Elf_Internal_Sym sym;
7842 bfd_vma value = syms[idx]->value;
7843 elf_symbol_type *type_ptr;
7844 flagword flags = syms[idx]->flags;
7847 if (!name_local_sections
7848 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
7850 /* Local section symbols have no name. */
7851 sym.st_name = (unsigned long) -1;
7855 /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize
7856 to get the final offset for st_name. */
7858 = (unsigned long) _bfd_elf_strtab_add (stt, syms[idx]->name,
7860 if (sym.st_name == (unsigned long) -1)
7864 type_ptr = elf_symbol_from (abfd, syms[idx]);
7866 if ((flags & BSF_SECTION_SYM) == 0
7867 && bfd_is_com_section (syms[idx]->section))
7869 /* ELF common symbols put the alignment into the `value' field,
7870 and the size into the `size' field. This is backwards from
7871 how BFD handles it, so reverse it here. */
7872 sym.st_size = value;
7873 if (type_ptr == NULL
7874 || type_ptr->internal_elf_sym.st_value == 0)
7875 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
7877 sym.st_value = type_ptr->internal_elf_sym.st_value;
7878 sym.st_shndx = _bfd_elf_section_from_bfd_section
7879 (abfd, syms[idx]->section);
7883 asection *sec = syms[idx]->section;
7886 if (sec->output_section)
7888 value += sec->output_offset;
7889 sec = sec->output_section;
7892 /* Don't add in the section vma for relocatable output. */
7893 if (! relocatable_p)
7895 sym.st_value = value;
7896 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
7898 if (bfd_is_abs_section (sec)
7900 && type_ptr->internal_elf_sym.st_shndx != 0)
7902 /* This symbol is in a real ELF section which we did
7903 not create as a BFD section. Undo the mapping done
7904 by copy_private_symbol_data. */
7905 shndx = type_ptr->internal_elf_sym.st_shndx;
7909 shndx = elf_onesymtab (abfd);
7912 shndx = elf_dynsymtab (abfd);
7915 shndx = elf_strtab_sec (abfd);
7918 shndx = elf_shstrtab_sec (abfd);
7921 if (elf_symtab_shndx_list (abfd))
7922 shndx = elf_symtab_shndx_list (abfd)->ndx;
7931 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
7933 if (shndx == SHN_BAD)
7937 /* Writing this would be a hell of a lot easier if
7938 we had some decent documentation on bfd, and
7939 knew what to expect of the library, and what to
7940 demand of applications. For example, it
7941 appears that `objcopy' might not set the
7942 section of a symbol to be a section that is
7943 actually in the output file. */
7944 sec2 = bfd_get_section_by_name (abfd, sec->name);
7946 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
7947 if (shndx == SHN_BAD)
7949 /* xgettext:c-format */
7950 _bfd_error_handler (_("\
7951 Unable to find equivalent output section for symbol '%s' from section '%s'"),
7952 syms[idx]->name ? syms[idx]->name : "<Local sym>",
7954 bfd_set_error (bfd_error_invalid_operation);
7960 sym.st_shndx = shndx;
7963 if ((flags & BSF_THREAD_LOCAL) != 0)
7965 else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0)
7966 type = STT_GNU_IFUNC;
7967 else if ((flags & BSF_FUNCTION) != 0)
7969 else if ((flags & BSF_OBJECT) != 0)
7971 else if ((flags & BSF_RELC) != 0)
7973 else if ((flags & BSF_SRELC) != 0)
7978 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
7981 /* Processor-specific types. */
7982 if (type_ptr != NULL
7983 && bed->elf_backend_get_symbol_type)
7984 type = ((*bed->elf_backend_get_symbol_type)
7985 (&type_ptr->internal_elf_sym, type));
7987 if (flags & BSF_SECTION_SYM)
7989 if (flags & BSF_GLOBAL)
7990 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
7992 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
7994 else if (bfd_is_com_section (syms[idx]->section))
7996 if (type != STT_TLS)
7998 if ((abfd->flags & BFD_CONVERT_ELF_COMMON))
7999 type = ((abfd->flags & BFD_USE_ELF_STT_COMMON)
8000 ? STT_COMMON : STT_OBJECT);
8002 type = ((flags & BSF_ELF_COMMON) != 0
8003 ? STT_COMMON : STT_OBJECT);
8005 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
8007 else if (bfd_is_und_section (syms[idx]->section))
8008 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
8012 else if (flags & BSF_FILE)
8013 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
8016 int bind = STB_LOCAL;
8018 if (flags & BSF_LOCAL)
8020 else if (flags & BSF_GNU_UNIQUE)
8021 bind = STB_GNU_UNIQUE;
8022 else if (flags & BSF_WEAK)
8024 else if (flags & BSF_GLOBAL)
8027 sym.st_info = ELF_ST_INFO (bind, type);
8030 if (type_ptr != NULL)
8032 sym.st_other = type_ptr->internal_elf_sym.st_other;
8033 sym.st_target_internal
8034 = type_ptr->internal_elf_sym.st_target_internal;
8039 sym.st_target_internal = 0;
8043 symstrtab[idx].sym = sym;
8044 symstrtab[idx].dest_index = outbound_syms_index;
8045 symstrtab[idx].destshndx_index = outbound_shndx_index;
8047 outbound_syms_index++;
8048 if (outbound_shndx != NULL)
8049 outbound_shndx_index++;
8052 /* Finalize the .strtab section. */
8053 _bfd_elf_strtab_finalize (stt);
8055 /* Swap out the .strtab section. */
8056 for (idx = 0; idx <= symcount; idx++)
8058 struct elf_sym_strtab *elfsym = &symstrtab[idx];
8059 if (elfsym->sym.st_name == (unsigned long) -1)
8060 elfsym->sym.st_name = 0;
8062 elfsym->sym.st_name = _bfd_elf_strtab_offset (stt,
8063 elfsym->sym.st_name);
8064 bed->s->swap_symbol_out (abfd, &elfsym->sym,
8066 + (elfsym->dest_index
8067 * bed->s->sizeof_sym)),
8069 + (elfsym->destshndx_index
8070 * sizeof (Elf_External_Sym_Shndx))));
8075 symstrtab_hdr->sh_size = _bfd_elf_strtab_size (stt);
8076 symstrtab_hdr->sh_type = SHT_STRTAB;
8077 symstrtab_hdr->sh_flags = bed->elf_strtab_flags;
8078 symstrtab_hdr->sh_addr = 0;
8079 symstrtab_hdr->sh_entsize = 0;
8080 symstrtab_hdr->sh_link = 0;
8081 symstrtab_hdr->sh_info = 0;
8082 symstrtab_hdr->sh_addralign = 1;
8087 /* Return the number of bytes required to hold the symtab vector.
8089 Note that we base it on the count plus 1, since we will null terminate
8090 the vector allocated based on this size. However, the ELF symbol table
8091 always has a dummy entry as symbol #0, so it ends up even. */
8094 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
8098 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
8100 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
8101 symtab_size = (symcount + 1) * (sizeof (asymbol *));
8103 symtab_size -= sizeof (asymbol *);
8109 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
8113 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
8115 if (elf_dynsymtab (abfd) == 0)
8117 bfd_set_error (bfd_error_invalid_operation);
8121 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
8122 symtab_size = (symcount + 1) * (sizeof (asymbol *));
8124 symtab_size -= sizeof (asymbol *);
8130 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
8133 return (asect->reloc_count + 1) * sizeof (arelent *);
8136 /* Canonicalize the relocs. */
8139 _bfd_elf_canonicalize_reloc (bfd *abfd,
8146 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8148 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
8151 tblptr = section->relocation;
8152 for (i = 0; i < section->reloc_count; i++)
8153 *relptr++ = tblptr++;
8157 return section->reloc_count;
8161 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
8163 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8164 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
8167 bfd_get_symcount (abfd) = symcount;
8172 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
8173 asymbol **allocation)
8175 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8176 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
8179 bfd_get_dynamic_symcount (abfd) = symcount;
8183 /* Return the size required for the dynamic reloc entries. Any loadable
8184 section that was actually installed in the BFD, and has type SHT_REL
8185 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
8186 dynamic reloc section. */
8189 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
8194 if (elf_dynsymtab (abfd) == 0)
8196 bfd_set_error (bfd_error_invalid_operation);
8200 ret = sizeof (arelent *);
8201 for (s = abfd->sections; s != NULL; s = s->next)
8202 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
8203 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
8204 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
8205 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
8206 * sizeof (arelent *));
8211 /* Canonicalize the dynamic relocation entries. Note that we return the
8212 dynamic relocations as a single block, although they are actually
8213 associated with particular sections; the interface, which was
8214 designed for SunOS style shared libraries, expects that there is only
8215 one set of dynamic relocs. Any loadable section that was actually
8216 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
8217 dynamic symbol table, is considered to be a dynamic reloc section. */
8220 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
8224 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8228 if (elf_dynsymtab (abfd) == 0)
8230 bfd_set_error (bfd_error_invalid_operation);
8234 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8236 for (s = abfd->sections; s != NULL; s = s->next)
8238 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
8239 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
8240 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
8245 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
8247 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
8249 for (i = 0; i < count; i++)
8260 /* Read in the version information. */
8263 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
8265 bfd_byte *contents = NULL;
8266 unsigned int freeidx = 0;
8268 if (elf_dynverref (abfd) != 0)
8270 Elf_Internal_Shdr *hdr;
8271 Elf_External_Verneed *everneed;
8272 Elf_Internal_Verneed *iverneed;
8274 bfd_byte *contents_end;
8276 hdr = &elf_tdata (abfd)->dynverref_hdr;
8278 if (hdr->sh_info == 0
8279 || hdr->sh_info > hdr->sh_size / sizeof (Elf_External_Verneed))
8281 error_return_bad_verref:
8283 (_("%pB: .gnu.version_r invalid entry"), abfd);
8284 bfd_set_error (bfd_error_bad_value);
8285 error_return_verref:
8286 elf_tdata (abfd)->verref = NULL;
8287 elf_tdata (abfd)->cverrefs = 0;
8291 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
8292 if (contents == NULL)
8293 goto error_return_verref;
8295 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
8296 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
8297 goto error_return_verref;
8299 elf_tdata (abfd)->verref = (Elf_Internal_Verneed *)
8300 bfd_alloc2 (abfd, hdr->sh_info, sizeof (Elf_Internal_Verneed));
8302 if (elf_tdata (abfd)->verref == NULL)
8303 goto error_return_verref;
8305 BFD_ASSERT (sizeof (Elf_External_Verneed)
8306 == sizeof (Elf_External_Vernaux));
8307 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
8308 everneed = (Elf_External_Verneed *) contents;
8309 iverneed = elf_tdata (abfd)->verref;
8310 for (i = 0; i < hdr->sh_info; i++, iverneed++)
8312 Elf_External_Vernaux *evernaux;
8313 Elf_Internal_Vernaux *ivernaux;
8316 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
8318 iverneed->vn_bfd = abfd;
8320 iverneed->vn_filename =
8321 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8323 if (iverneed->vn_filename == NULL)
8324 goto error_return_bad_verref;
8326 if (iverneed->vn_cnt == 0)
8327 iverneed->vn_auxptr = NULL;
8330 iverneed->vn_auxptr = (struct elf_internal_vernaux *)
8331 bfd_alloc2 (abfd, iverneed->vn_cnt,
8332 sizeof (Elf_Internal_Vernaux));
8333 if (iverneed->vn_auxptr == NULL)
8334 goto error_return_verref;
8337 if (iverneed->vn_aux
8338 > (size_t) (contents_end - (bfd_byte *) everneed))
8339 goto error_return_bad_verref;
8341 evernaux = ((Elf_External_Vernaux *)
8342 ((bfd_byte *) everneed + iverneed->vn_aux));
8343 ivernaux = iverneed->vn_auxptr;
8344 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
8346 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
8348 ivernaux->vna_nodename =
8349 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8350 ivernaux->vna_name);
8351 if (ivernaux->vna_nodename == NULL)
8352 goto error_return_bad_verref;
8354 if (ivernaux->vna_other > freeidx)
8355 freeidx = ivernaux->vna_other;
8357 ivernaux->vna_nextptr = NULL;
8358 if (ivernaux->vna_next == 0)
8360 iverneed->vn_cnt = j + 1;
8363 if (j + 1 < iverneed->vn_cnt)
8364 ivernaux->vna_nextptr = ivernaux + 1;
8366 if (ivernaux->vna_next
8367 > (size_t) (contents_end - (bfd_byte *) evernaux))
8368 goto error_return_bad_verref;
8370 evernaux = ((Elf_External_Vernaux *)
8371 ((bfd_byte *) evernaux + ivernaux->vna_next));
8374 iverneed->vn_nextref = NULL;
8375 if (iverneed->vn_next == 0)
8377 if (i + 1 < hdr->sh_info)
8378 iverneed->vn_nextref = iverneed + 1;
8380 if (iverneed->vn_next
8381 > (size_t) (contents_end - (bfd_byte *) everneed))
8382 goto error_return_bad_verref;
8384 everneed = ((Elf_External_Verneed *)
8385 ((bfd_byte *) everneed + iverneed->vn_next));
8387 elf_tdata (abfd)->cverrefs = i;
8393 if (elf_dynverdef (abfd) != 0)
8395 Elf_Internal_Shdr *hdr;
8396 Elf_External_Verdef *everdef;
8397 Elf_Internal_Verdef *iverdef;
8398 Elf_Internal_Verdef *iverdefarr;
8399 Elf_Internal_Verdef iverdefmem;
8401 unsigned int maxidx;
8402 bfd_byte *contents_end_def, *contents_end_aux;
8404 hdr = &elf_tdata (abfd)->dynverdef_hdr;
8406 if (hdr->sh_info == 0 || hdr->sh_size < sizeof (Elf_External_Verdef))
8408 error_return_bad_verdef:
8410 (_("%pB: .gnu.version_d invalid entry"), abfd);
8411 bfd_set_error (bfd_error_bad_value);
8412 error_return_verdef:
8413 elf_tdata (abfd)->verdef = NULL;
8414 elf_tdata (abfd)->cverdefs = 0;
8418 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
8419 if (contents == NULL)
8420 goto error_return_verdef;
8421 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
8422 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
8423 goto error_return_verdef;
8425 BFD_ASSERT (sizeof (Elf_External_Verdef)
8426 >= sizeof (Elf_External_Verdaux));
8427 contents_end_def = contents + hdr->sh_size
8428 - sizeof (Elf_External_Verdef);
8429 contents_end_aux = contents + hdr->sh_size
8430 - sizeof (Elf_External_Verdaux);
8432 /* We know the number of entries in the section but not the maximum
8433 index. Therefore we have to run through all entries and find
8435 everdef = (Elf_External_Verdef *) contents;
8437 for (i = 0; i < hdr->sh_info; ++i)
8439 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
8441 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) == 0)
8442 goto error_return_bad_verdef;
8443 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
8444 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
8446 if (iverdefmem.vd_next == 0)
8449 if (iverdefmem.vd_next
8450 > (size_t) (contents_end_def - (bfd_byte *) everdef))
8451 goto error_return_bad_verdef;
8453 everdef = ((Elf_External_Verdef *)
8454 ((bfd_byte *) everdef + iverdefmem.vd_next));
8457 if (default_imported_symver)
8459 if (freeidx > maxidx)
8465 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
8466 bfd_zalloc2 (abfd, maxidx, sizeof (Elf_Internal_Verdef));
8467 if (elf_tdata (abfd)->verdef == NULL)
8468 goto error_return_verdef;
8470 elf_tdata (abfd)->cverdefs = maxidx;
8472 everdef = (Elf_External_Verdef *) contents;
8473 iverdefarr = elf_tdata (abfd)->verdef;
8474 for (i = 0; i < hdr->sh_info; i++)
8476 Elf_External_Verdaux *everdaux;
8477 Elf_Internal_Verdaux *iverdaux;
8480 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
8482 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
8483 goto error_return_bad_verdef;
8485 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
8486 memcpy (iverdef, &iverdefmem, offsetof (Elf_Internal_Verdef, vd_bfd));
8488 iverdef->vd_bfd = abfd;
8490 if (iverdef->vd_cnt == 0)
8491 iverdef->vd_auxptr = NULL;
8494 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
8495 bfd_alloc2 (abfd, iverdef->vd_cnt,
8496 sizeof (Elf_Internal_Verdaux));
8497 if (iverdef->vd_auxptr == NULL)
8498 goto error_return_verdef;
8502 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
8503 goto error_return_bad_verdef;
8505 everdaux = ((Elf_External_Verdaux *)
8506 ((bfd_byte *) everdef + iverdef->vd_aux));
8507 iverdaux = iverdef->vd_auxptr;
8508 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
8510 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
8512 iverdaux->vda_nodename =
8513 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8514 iverdaux->vda_name);
8515 if (iverdaux->vda_nodename == NULL)
8516 goto error_return_bad_verdef;
8518 iverdaux->vda_nextptr = NULL;
8519 if (iverdaux->vda_next == 0)
8521 iverdef->vd_cnt = j + 1;
8524 if (j + 1 < iverdef->vd_cnt)
8525 iverdaux->vda_nextptr = iverdaux + 1;
8527 if (iverdaux->vda_next
8528 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
8529 goto error_return_bad_verdef;
8531 everdaux = ((Elf_External_Verdaux *)
8532 ((bfd_byte *) everdaux + iverdaux->vda_next));
8535 iverdef->vd_nodename = NULL;
8536 if (iverdef->vd_cnt)
8537 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
8539 iverdef->vd_nextdef = NULL;
8540 if (iverdef->vd_next == 0)
8542 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
8543 iverdef->vd_nextdef = iverdef + 1;
8545 everdef = ((Elf_External_Verdef *)
8546 ((bfd_byte *) everdef + iverdef->vd_next));
8552 else if (default_imported_symver)
8559 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
8560 bfd_zalloc2 (abfd, freeidx, sizeof (Elf_Internal_Verdef));
8561 if (elf_tdata (abfd)->verdef == NULL)
8564 elf_tdata (abfd)->cverdefs = freeidx;
8567 /* Create a default version based on the soname. */
8568 if (default_imported_symver)
8570 Elf_Internal_Verdef *iverdef;
8571 Elf_Internal_Verdaux *iverdaux;
8573 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];
8575 iverdef->vd_version = VER_DEF_CURRENT;
8576 iverdef->vd_flags = 0;
8577 iverdef->vd_ndx = freeidx;
8578 iverdef->vd_cnt = 1;
8580 iverdef->vd_bfd = abfd;
8582 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
8583 if (iverdef->vd_nodename == NULL)
8584 goto error_return_verdef;
8585 iverdef->vd_nextdef = NULL;
8586 iverdef->vd_auxptr = ((struct elf_internal_verdaux *)
8587 bfd_zalloc (abfd, sizeof (Elf_Internal_Verdaux)));
8588 if (iverdef->vd_auxptr == NULL)
8589 goto error_return_verdef;
8591 iverdaux = iverdef->vd_auxptr;
8592 iverdaux->vda_nodename = iverdef->vd_nodename;
8598 if (contents != NULL)
8604 _bfd_elf_make_empty_symbol (bfd *abfd)
8606 elf_symbol_type *newsym;
8608 newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof * newsym);
8611 newsym->symbol.the_bfd = abfd;
8612 return &newsym->symbol;
8616 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
8620 bfd_symbol_info (symbol, ret);
8623 /* Return whether a symbol name implies a local symbol. Most targets
8624 use this function for the is_local_label_name entry point, but some
8628 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
8631 /* Normal local symbols start with ``.L''. */
8632 if (name[0] == '.' && name[1] == 'L')
8635 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
8636 DWARF debugging symbols starting with ``..''. */
8637 if (name[0] == '.' && name[1] == '.')
8640 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
8641 emitting DWARF debugging output. I suspect this is actually a
8642 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
8643 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
8644 underscore to be emitted on some ELF targets). For ease of use,
8645 we treat such symbols as local. */
8646 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
8649 /* Treat assembler generated fake symbols, dollar local labels and
8650 forward-backward labels (aka local labels) as locals.
8651 These labels have the form:
8653 L0^A.* (fake symbols)
8655 [.]?L[0123456789]+{^A|^B}[0123456789]* (local labels)
8657 Versions which start with .L will have already been matched above,
8658 so we only need to match the rest. */
8659 if (name[0] == 'L' && ISDIGIT (name[1]))
8661 bfd_boolean ret = FALSE;
8665 for (p = name + 2; (c = *p); p++)
8667 if (c == 1 || c == 2)
8669 if (c == 1 && p == name + 2)
8670 /* A fake symbol. */
8673 /* FIXME: We are being paranoid here and treating symbols like
8674 L0^Bfoo as if there were non-local, on the grounds that the
8675 assembler will never generate them. But can any symbol
8676 containing an ASCII value in the range 1-31 ever be anything
8677 other than some kind of local ? */
8694 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
8695 asymbol *symbol ATTRIBUTE_UNUSED)
8702 _bfd_elf_set_arch_mach (bfd *abfd,
8703 enum bfd_architecture arch,
8704 unsigned long machine)
8706 /* If this isn't the right architecture for this backend, and this
8707 isn't the generic backend, fail. */
8708 if (arch != get_elf_backend_data (abfd)->arch
8709 && arch != bfd_arch_unknown
8710 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
8713 return bfd_default_set_arch_mach (abfd, arch, machine);
8716 /* Find the nearest line to a particular section and offset,
8717 for error reporting. */
8720 _bfd_elf_find_nearest_line (bfd *abfd,
8724 const char **filename_ptr,
8725 const char **functionname_ptr,
8726 unsigned int *line_ptr,
8727 unsigned int *discriminator_ptr)
8731 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
8732 filename_ptr, functionname_ptr,
8733 line_ptr, discriminator_ptr,
8734 dwarf_debug_sections, 0,
8735 &elf_tdata (abfd)->dwarf2_find_line_info)
8736 || _bfd_dwarf1_find_nearest_line (abfd, symbols, section, offset,
8737 filename_ptr, functionname_ptr,
8740 if (!*functionname_ptr)
8741 _bfd_elf_find_function (abfd, symbols, section, offset,
8742 *filename_ptr ? NULL : filename_ptr,
8747 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
8748 &found, filename_ptr,
8749 functionname_ptr, line_ptr,
8750 &elf_tdata (abfd)->line_info))
8752 if (found && (*functionname_ptr || *line_ptr))
8755 if (symbols == NULL)
8758 if (! _bfd_elf_find_function (abfd, symbols, section, offset,
8759 filename_ptr, functionname_ptr))
8766 /* Find the line for a symbol. */
8769 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
8770 const char **filename_ptr, unsigned int *line_ptr)
8772 return _bfd_dwarf2_find_nearest_line (abfd, symbols, symbol, NULL, 0,
8773 filename_ptr, NULL, line_ptr, NULL,
8774 dwarf_debug_sections, 0,
8775 &elf_tdata (abfd)->dwarf2_find_line_info);
8778 /* After a call to bfd_find_nearest_line, successive calls to
8779 bfd_find_inliner_info can be used to get source information about
8780 each level of function inlining that terminated at the address
8781 passed to bfd_find_nearest_line. Currently this is only supported
8782 for DWARF2 with appropriate DWARF3 extensions. */
8785 _bfd_elf_find_inliner_info (bfd *abfd,
8786 const char **filename_ptr,
8787 const char **functionname_ptr,
8788 unsigned int *line_ptr)
8791 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
8792 functionname_ptr, line_ptr,
8793 & elf_tdata (abfd)->dwarf2_find_line_info);
8798 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
8800 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8801 int ret = bed->s->sizeof_ehdr;
8803 if (!bfd_link_relocatable (info))
8805 bfd_size_type phdr_size = elf_program_header_size (abfd);
8807 if (phdr_size == (bfd_size_type) -1)
8809 struct elf_segment_map *m;
8812 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
8813 phdr_size += bed->s->sizeof_phdr;
8816 phdr_size = get_program_header_size (abfd, info);
8819 elf_program_header_size (abfd) = phdr_size;
8827 _bfd_elf_set_section_contents (bfd *abfd,
8829 const void *location,
8831 bfd_size_type count)
8833 Elf_Internal_Shdr *hdr;
8836 if (! abfd->output_has_begun
8837 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
8843 hdr = &elf_section_data (section)->this_hdr;
8844 if (hdr->sh_offset == (file_ptr) -1)
8846 /* We must compress this section. Write output to the buffer. */
8847 unsigned char *contents = hdr->contents;
8848 if ((offset + count) > hdr->sh_size
8849 || (section->flags & SEC_ELF_COMPRESS) == 0
8850 || contents == NULL)
8852 memcpy (contents + offset, location, count);
8855 pos = hdr->sh_offset + offset;
8856 if (bfd_seek (abfd, pos, SEEK_SET) != 0
8857 || bfd_bwrite (location, count, abfd) != count)
8864 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
8865 arelent *cache_ptr ATTRIBUTE_UNUSED,
8866 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
8871 /* Try to convert a non-ELF reloc into an ELF one. */
8874 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
8876 /* Check whether we really have an ELF howto. */
8878 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
8880 bfd_reloc_code_real_type code;
8881 reloc_howto_type *howto;
8883 /* Alien reloc: Try to determine its type to replace it with an
8884 equivalent ELF reloc. */
8886 if (areloc->howto->pc_relative)
8888 switch (areloc->howto->bitsize)
8891 code = BFD_RELOC_8_PCREL;
8894 code = BFD_RELOC_12_PCREL;
8897 code = BFD_RELOC_16_PCREL;
8900 code = BFD_RELOC_24_PCREL;
8903 code = BFD_RELOC_32_PCREL;
8906 code = BFD_RELOC_64_PCREL;
8912 howto = bfd_reloc_type_lookup (abfd, code);
8914 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
8916 if (howto->pcrel_offset)
8917 areloc->addend += areloc->address;
8919 areloc->addend -= areloc->address; /* addend is unsigned!! */
8924 switch (areloc->howto->bitsize)
8930 code = BFD_RELOC_14;
8933 code = BFD_RELOC_16;
8936 code = BFD_RELOC_26;
8939 code = BFD_RELOC_32;
8942 code = BFD_RELOC_64;
8948 howto = bfd_reloc_type_lookup (abfd, code);
8952 areloc->howto = howto;
8961 /* xgettext:c-format */
8962 (_("%pB: unsupported relocation type %s"),
8963 abfd, areloc->howto->name);
8964 bfd_set_error (bfd_error_bad_value);
8969 _bfd_elf_close_and_cleanup (bfd *abfd)
8971 struct elf_obj_tdata *tdata = elf_tdata (abfd);
8972 if (bfd_get_format (abfd) == bfd_object && tdata != NULL)
8974 if (elf_tdata (abfd)->o != NULL && elf_shstrtab (abfd) != NULL)
8975 _bfd_elf_strtab_free (elf_shstrtab (abfd));
8976 _bfd_dwarf2_cleanup_debug_info (abfd, &tdata->dwarf2_find_line_info);
8979 return _bfd_generic_close_and_cleanup (abfd);
8982 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
8983 in the relocation's offset. Thus we cannot allow any sort of sanity
8984 range-checking to interfere. There is nothing else to do in processing
8987 bfd_reloc_status_type
8988 _bfd_elf_rel_vtable_reloc_fn
8989 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
8990 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
8991 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
8992 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
8994 return bfd_reloc_ok;
8997 /* Elf core file support. Much of this only works on native
8998 toolchains, since we rely on knowing the
8999 machine-dependent procfs structure in order to pick
9000 out details about the corefile. */
9002 #ifdef HAVE_SYS_PROCFS_H
9003 /* Needed for new procfs interface on sparc-solaris. */
9004 # define _STRUCTURED_PROC 1
9005 # include <sys/procfs.h>
9008 /* Return a PID that identifies a "thread" for threaded cores, or the
9009 PID of the main process for non-threaded cores. */
9012 elfcore_make_pid (bfd *abfd)
9016 pid = elf_tdata (abfd)->core->lwpid;
9018 pid = elf_tdata (abfd)->core->pid;
9023 /* If there isn't a section called NAME, make one, using
9024 data from SECT. Note, this function will generate a
9025 reference to NAME, so you shouldn't deallocate or
9029 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
9033 if (bfd_get_section_by_name (abfd, name) != NULL)
9036 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
9040 sect2->size = sect->size;
9041 sect2->filepos = sect->filepos;
9042 sect2->alignment_power = sect->alignment_power;
9046 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
9047 actually creates up to two pseudosections:
9048 - For the single-threaded case, a section named NAME, unless
9049 such a section already exists.
9050 - For the multi-threaded case, a section named "NAME/PID", where
9051 PID is elfcore_make_pid (abfd).
9052 Both pseudosections have identical contents. */
9054 _bfd_elfcore_make_pseudosection (bfd *abfd,
9060 char *threaded_name;
9064 /* Build the section name. */
9066 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
9067 len = strlen (buf) + 1;
9068 threaded_name = (char *) bfd_alloc (abfd, len);
9069 if (threaded_name == NULL)
9071 memcpy (threaded_name, buf, len);
9073 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
9078 sect->filepos = filepos;
9079 sect->alignment_power = 2;
9081 return elfcore_maybe_make_sect (abfd, name, sect);
9084 /* prstatus_t exists on:
9086 linux 2.[01] + glibc
9090 #if defined (HAVE_PRSTATUS_T)
9093 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
9098 if (note->descsz == sizeof (prstatus_t))
9102 size = sizeof (prstat.pr_reg);
9103 offset = offsetof (prstatus_t, pr_reg);
9104 memcpy (&prstat, note->descdata, sizeof (prstat));
9106 /* Do not overwrite the core signal if it
9107 has already been set by another thread. */
9108 if (elf_tdata (abfd)->core->signal == 0)
9109 elf_tdata (abfd)->core->signal = prstat.pr_cursig;
9110 if (elf_tdata (abfd)->core->pid == 0)
9111 elf_tdata (abfd)->core->pid = prstat.pr_pid;
9113 /* pr_who exists on:
9116 pr_who doesn't exist on:
9119 #if defined (HAVE_PRSTATUS_T_PR_WHO)
9120 elf_tdata (abfd)->core->lwpid = prstat.pr_who;
9122 elf_tdata (abfd)->core->lwpid = prstat.pr_pid;
9125 #if defined (HAVE_PRSTATUS32_T)
9126 else if (note->descsz == sizeof (prstatus32_t))
9128 /* 64-bit host, 32-bit corefile */
9129 prstatus32_t prstat;
9131 size = sizeof (prstat.pr_reg);
9132 offset = offsetof (prstatus32_t, pr_reg);
9133 memcpy (&prstat, note->descdata, sizeof (prstat));
9135 /* Do not overwrite the core signal if it
9136 has already been set by another thread. */
9137 if (elf_tdata (abfd)->core->signal == 0)
9138 elf_tdata (abfd)->core->signal = prstat.pr_cursig;
9139 if (elf_tdata (abfd)->core->pid == 0)
9140 elf_tdata (abfd)->core->pid = prstat.pr_pid;
9142 /* pr_who exists on:
9145 pr_who doesn't exist on:
9148 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
9149 elf_tdata (abfd)->core->lwpid = prstat.pr_who;
9151 elf_tdata (abfd)->core->lwpid = prstat.pr_pid;
9154 #endif /* HAVE_PRSTATUS32_T */
9157 /* Fail - we don't know how to handle any other
9158 note size (ie. data object type). */
9162 /* Make a ".reg/999" section and a ".reg" section. */
9163 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
9164 size, note->descpos + offset);
9166 #endif /* defined (HAVE_PRSTATUS_T) */
9168 /* Create a pseudosection containing the exact contents of NOTE. */
9170 elfcore_make_note_pseudosection (bfd *abfd,
9172 Elf_Internal_Note *note)
9174 return _bfd_elfcore_make_pseudosection (abfd, name,
9175 note->descsz, note->descpos);
9178 /* There isn't a consistent prfpregset_t across platforms,
9179 but it doesn't matter, because we don't have to pick this
9180 data structure apart. */
9183 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
9185 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
9188 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
9189 type of NT_PRXFPREG. Just include the whole note's contents
9193 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
9195 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
9198 /* Linux dumps the Intel XSAVE extended state in a note named "LINUX"
9199 with a note type of NT_X86_XSTATE. Just include the whole note's
9200 contents literally. */
9203 elfcore_grok_xstatereg (bfd *abfd, Elf_Internal_Note *note)
9205 return elfcore_make_note_pseudosection (abfd, ".reg-xstate", note);
9209 elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note)
9211 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note);
9215 elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note)
9217 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note);
9221 elfcore_grok_s390_high_gprs (bfd *abfd, Elf_Internal_Note *note)
9223 return elfcore_make_note_pseudosection (abfd, ".reg-s390-high-gprs", note);
9227 elfcore_grok_s390_timer (bfd *abfd, Elf_Internal_Note *note)
9229 return elfcore_make_note_pseudosection (abfd, ".reg-s390-timer", note);
9233 elfcore_grok_s390_todcmp (bfd *abfd, Elf_Internal_Note *note)
9235 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todcmp", note);
9239 elfcore_grok_s390_todpreg (bfd *abfd, Elf_Internal_Note *note)
9241 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todpreg", note);
9245 elfcore_grok_s390_ctrs (bfd *abfd, Elf_Internal_Note *note)
9247 return elfcore_make_note_pseudosection (abfd, ".reg-s390-ctrs", note);
9251 elfcore_grok_s390_prefix (bfd *abfd, Elf_Internal_Note *note)
9253 return elfcore_make_note_pseudosection (abfd, ".reg-s390-prefix", note);
9257 elfcore_grok_s390_last_break (bfd *abfd, Elf_Internal_Note *note)
9259 return elfcore_make_note_pseudosection (abfd, ".reg-s390-last-break", note);
9263 elfcore_grok_s390_system_call (bfd *abfd, Elf_Internal_Note *note)
9265 return elfcore_make_note_pseudosection (abfd, ".reg-s390-system-call", note);
9269 elfcore_grok_s390_tdb (bfd *abfd, Elf_Internal_Note *note)
9271 return elfcore_make_note_pseudosection (abfd, ".reg-s390-tdb", note);
9275 elfcore_grok_s390_vxrs_low (bfd *abfd, Elf_Internal_Note *note)
9277 return elfcore_make_note_pseudosection (abfd, ".reg-s390-vxrs-low", note);
9281 elfcore_grok_s390_vxrs_high (bfd *abfd, Elf_Internal_Note *note)
9283 return elfcore_make_note_pseudosection (abfd, ".reg-s390-vxrs-high", note);
9287 elfcore_grok_s390_gs_cb (bfd *abfd, Elf_Internal_Note *note)
9289 return elfcore_make_note_pseudosection (abfd, ".reg-s390-gs-cb", note);
9293 elfcore_grok_s390_gs_bc (bfd *abfd, Elf_Internal_Note *note)
9295 return elfcore_make_note_pseudosection (abfd, ".reg-s390-gs-bc", note);
9299 elfcore_grok_arm_vfp (bfd *abfd, Elf_Internal_Note *note)
9301 return elfcore_make_note_pseudosection (abfd, ".reg-arm-vfp", note);
9305 elfcore_grok_aarch_tls (bfd *abfd, Elf_Internal_Note *note)
9307 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-tls", note);
9311 elfcore_grok_aarch_hw_break (bfd *abfd, Elf_Internal_Note *note)
9313 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-break", note);
9317 elfcore_grok_aarch_hw_watch (bfd *abfd, Elf_Internal_Note *note)
9319 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-watch", note);
9322 #if defined (HAVE_PRPSINFO_T)
9323 typedef prpsinfo_t elfcore_psinfo_t;
9324 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
9325 typedef prpsinfo32_t elfcore_psinfo32_t;
9329 #if defined (HAVE_PSINFO_T)
9330 typedef psinfo_t elfcore_psinfo_t;
9331 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
9332 typedef psinfo32_t elfcore_psinfo32_t;
9336 /* return a malloc'ed copy of a string at START which is at
9337 most MAX bytes long, possibly without a terminating '\0'.
9338 the copy will always have a terminating '\0'. */
9341 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
9344 char *end = (char *) memchr (start, '\0', max);
9352 dups = (char *) bfd_alloc (abfd, len + 1);
9356 memcpy (dups, start, len);
9362 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
9364 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
9366 if (note->descsz == sizeof (elfcore_psinfo_t))
9368 elfcore_psinfo_t psinfo;
9370 memcpy (&psinfo, note->descdata, sizeof (psinfo));
9372 #if defined (HAVE_PSINFO_T_PR_PID) || defined (HAVE_PRPSINFO_T_PR_PID)
9373 elf_tdata (abfd)->core->pid = psinfo.pr_pid;
9375 elf_tdata (abfd)->core->program
9376 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
9377 sizeof (psinfo.pr_fname));
9379 elf_tdata (abfd)->core->command
9380 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
9381 sizeof (psinfo.pr_psargs));
9383 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
9384 else if (note->descsz == sizeof (elfcore_psinfo32_t))
9386 /* 64-bit host, 32-bit corefile */
9387 elfcore_psinfo32_t psinfo;
9389 memcpy (&psinfo, note->descdata, sizeof (psinfo));
9391 #if defined (HAVE_PSINFO32_T_PR_PID) || defined (HAVE_PRPSINFO32_T_PR_PID)
9392 elf_tdata (abfd)->core->pid = psinfo.pr_pid;
9394 elf_tdata (abfd)->core->program
9395 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
9396 sizeof (psinfo.pr_fname));
9398 elf_tdata (abfd)->core->command
9399 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
9400 sizeof (psinfo.pr_psargs));
9406 /* Fail - we don't know how to handle any other
9407 note size (ie. data object type). */
9411 /* Note that for some reason, a spurious space is tacked
9412 onto the end of the args in some (at least one anyway)
9413 implementations, so strip it off if it exists. */
9416 char *command = elf_tdata (abfd)->core->command;
9417 int n = strlen (command);
9419 if (0 < n && command[n - 1] == ' ')
9420 command[n - 1] = '\0';
9425 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
9427 #if defined (HAVE_PSTATUS_T)
9429 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
9431 if (note->descsz == sizeof (pstatus_t)
9432 #if defined (HAVE_PXSTATUS_T)
9433 || note->descsz == sizeof (pxstatus_t)
9439 memcpy (&pstat, note->descdata, sizeof (pstat));
9441 elf_tdata (abfd)->core->pid = pstat.pr_pid;
9443 #if defined (HAVE_PSTATUS32_T)
9444 else if (note->descsz == sizeof (pstatus32_t))
9446 /* 64-bit host, 32-bit corefile */
9449 memcpy (&pstat, note->descdata, sizeof (pstat));
9451 elf_tdata (abfd)->core->pid = pstat.pr_pid;
9454 /* Could grab some more details from the "representative"
9455 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
9456 NT_LWPSTATUS note, presumably. */
9460 #endif /* defined (HAVE_PSTATUS_T) */
9462 #if defined (HAVE_LWPSTATUS_T)
9464 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
9466 lwpstatus_t lwpstat;
9472 if (note->descsz != sizeof (lwpstat)
9473 #if defined (HAVE_LWPXSTATUS_T)
9474 && note->descsz != sizeof (lwpxstatus_t)
9479 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
9481 elf_tdata (abfd)->core->lwpid = lwpstat.pr_lwpid;
9482 /* Do not overwrite the core signal if it has already been set by
9484 if (elf_tdata (abfd)->core->signal == 0)
9485 elf_tdata (abfd)->core->signal = lwpstat.pr_cursig;
9487 /* Make a ".reg/999" section. */
9489 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
9490 len = strlen (buf) + 1;
9491 name = bfd_alloc (abfd, len);
9494 memcpy (name, buf, len);
9496 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9500 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
9501 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
9502 sect->filepos = note->descpos
9503 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
9506 #if defined (HAVE_LWPSTATUS_T_PR_REG)
9507 sect->size = sizeof (lwpstat.pr_reg);
9508 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
9511 sect->alignment_power = 2;
9513 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
9516 /* Make a ".reg2/999" section */
9518 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
9519 len = strlen (buf) + 1;
9520 name = bfd_alloc (abfd, len);
9523 memcpy (name, buf, len);
9525 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9529 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
9530 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
9531 sect->filepos = note->descpos
9532 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
9535 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
9536 sect->size = sizeof (lwpstat.pr_fpreg);
9537 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
9540 sect->alignment_power = 2;
9542 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
9544 #endif /* defined (HAVE_LWPSTATUS_T) */
9547 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
9554 int is_active_thread;
9557 if (note->descsz < 728)
9560 if (! CONST_STRNEQ (note->namedata, "win32"))
9563 type = bfd_get_32 (abfd, note->descdata);
9567 case 1 /* NOTE_INFO_PROCESS */:
9568 /* FIXME: need to add ->core->command. */
9569 /* process_info.pid */
9570 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 8);
9571 /* process_info.signal */
9572 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 12);
9575 case 2 /* NOTE_INFO_THREAD */:
9576 /* Make a ".reg/999" section. */
9577 /* thread_info.tid */
9578 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
9580 len = strlen (buf) + 1;
9581 name = (char *) bfd_alloc (abfd, len);
9585 memcpy (name, buf, len);
9587 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9591 /* sizeof (thread_info.thread_context) */
9593 /* offsetof (thread_info.thread_context) */
9594 sect->filepos = note->descpos + 12;
9595 sect->alignment_power = 2;
9597 /* thread_info.is_active_thread */
9598 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
9600 if (is_active_thread)
9601 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
9605 case 3 /* NOTE_INFO_MODULE */:
9606 /* Make a ".module/xxxxxxxx" section. */
9607 /* module_info.base_address */
9608 base_addr = bfd_get_32 (abfd, note->descdata + 4);
9609 sprintf (buf, ".module/%08lx", (unsigned long) base_addr);
9611 len = strlen (buf) + 1;
9612 name = (char *) bfd_alloc (abfd, len);
9616 memcpy (name, buf, len);
9618 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9623 sect->size = note->descsz;
9624 sect->filepos = note->descpos;
9625 sect->alignment_power = 2;
9636 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
9638 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9646 if (bed->elf_backend_grok_prstatus)
9647 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
9649 #if defined (HAVE_PRSTATUS_T)
9650 return elfcore_grok_prstatus (abfd, note);
9655 #if defined (HAVE_PSTATUS_T)
9657 return elfcore_grok_pstatus (abfd, note);
9660 #if defined (HAVE_LWPSTATUS_T)
9662 return elfcore_grok_lwpstatus (abfd, note);
9665 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
9666 return elfcore_grok_prfpreg (abfd, note);
9668 case NT_WIN32PSTATUS:
9669 return elfcore_grok_win32pstatus (abfd, note);
9671 case NT_PRXFPREG: /* Linux SSE extension */
9672 if (note->namesz == 6
9673 && strcmp (note->namedata, "LINUX") == 0)
9674 return elfcore_grok_prxfpreg (abfd, note);
9678 case NT_X86_XSTATE: /* Linux XSAVE extension */
9679 if (note->namesz == 6
9680 && strcmp (note->namedata, "LINUX") == 0)
9681 return elfcore_grok_xstatereg (abfd, note);
9686 if (note->namesz == 6
9687 && strcmp (note->namedata, "LINUX") == 0)
9688 return elfcore_grok_ppc_vmx (abfd, note);
9693 if (note->namesz == 6
9694 && strcmp (note->namedata, "LINUX") == 0)
9695 return elfcore_grok_ppc_vsx (abfd, note);
9699 case NT_S390_HIGH_GPRS:
9700 if (note->namesz == 6
9701 && strcmp (note->namedata, "LINUX") == 0)
9702 return elfcore_grok_s390_high_gprs (abfd, note);
9707 if (note->namesz == 6
9708 && strcmp (note->namedata, "LINUX") == 0)
9709 return elfcore_grok_s390_timer (abfd, note);
9713 case NT_S390_TODCMP:
9714 if (note->namesz == 6
9715 && strcmp (note->namedata, "LINUX") == 0)
9716 return elfcore_grok_s390_todcmp (abfd, note);
9720 case NT_S390_TODPREG:
9721 if (note->namesz == 6
9722 && strcmp (note->namedata, "LINUX") == 0)
9723 return elfcore_grok_s390_todpreg (abfd, note);
9728 if (note->namesz == 6
9729 && strcmp (note->namedata, "LINUX") == 0)
9730 return elfcore_grok_s390_ctrs (abfd, note);
9734 case NT_S390_PREFIX:
9735 if (note->namesz == 6
9736 && strcmp (note->namedata, "LINUX") == 0)
9737 return elfcore_grok_s390_prefix (abfd, note);
9741 case NT_S390_LAST_BREAK:
9742 if (note->namesz == 6
9743 && strcmp (note->namedata, "LINUX") == 0)
9744 return elfcore_grok_s390_last_break (abfd, note);
9748 case NT_S390_SYSTEM_CALL:
9749 if (note->namesz == 6
9750 && strcmp (note->namedata, "LINUX") == 0)
9751 return elfcore_grok_s390_system_call (abfd, note);
9756 if (note->namesz == 6
9757 && strcmp (note->namedata, "LINUX") == 0)
9758 return elfcore_grok_s390_tdb (abfd, note);
9762 case NT_S390_VXRS_LOW:
9763 if (note->namesz == 6
9764 && strcmp (note->namedata, "LINUX") == 0)
9765 return elfcore_grok_s390_vxrs_low (abfd, note);
9769 case NT_S390_VXRS_HIGH:
9770 if (note->namesz == 6
9771 && strcmp (note->namedata, "LINUX") == 0)
9772 return elfcore_grok_s390_vxrs_high (abfd, note);
9777 if (note->namesz == 6
9778 && strcmp (note->namedata, "LINUX") == 0)
9779 return elfcore_grok_s390_gs_cb (abfd, note);
9784 if (note->namesz == 6
9785 && strcmp (note->namedata, "LINUX") == 0)
9786 return elfcore_grok_s390_gs_bc (abfd, note);
9791 if (note->namesz == 6
9792 && strcmp (note->namedata, "LINUX") == 0)
9793 return elfcore_grok_arm_vfp (abfd, note);
9798 if (note->namesz == 6
9799 && strcmp (note->namedata, "LINUX") == 0)
9800 return elfcore_grok_aarch_tls (abfd, note);
9804 case NT_ARM_HW_BREAK:
9805 if (note->namesz == 6
9806 && strcmp (note->namedata, "LINUX") == 0)
9807 return elfcore_grok_aarch_hw_break (abfd, note);
9811 case NT_ARM_HW_WATCH:
9812 if (note->namesz == 6
9813 && strcmp (note->namedata, "LINUX") == 0)
9814 return elfcore_grok_aarch_hw_watch (abfd, note);
9820 if (bed->elf_backend_grok_psinfo)
9821 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
9823 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
9824 return elfcore_grok_psinfo (abfd, note);
9831 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
9836 sect->size = note->descsz;
9837 sect->filepos = note->descpos;
9838 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
9844 return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.file",
9848 return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.siginfo",
9855 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
9857 struct bfd_build_id* build_id;
9859 if (note->descsz == 0)
9862 build_id = bfd_alloc (abfd, sizeof (struct bfd_build_id) - 1 + note->descsz);
9863 if (build_id == NULL)
9866 build_id->size = note->descsz;
9867 memcpy (build_id->data, note->descdata, note->descsz);
9868 abfd->build_id = build_id;
9874 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
9881 case NT_GNU_PROPERTY_TYPE_0:
9882 return _bfd_elf_parse_gnu_properties (abfd, note);
9884 case NT_GNU_BUILD_ID:
9885 return elfobj_grok_gnu_build_id (abfd, note);
9890 elfobj_grok_stapsdt_note_1 (bfd *abfd, Elf_Internal_Note *note)
9892 struct sdt_note *cur =
9893 (struct sdt_note *) bfd_alloc (abfd, sizeof (struct sdt_note)
9896 cur->next = (struct sdt_note *) (elf_tdata (abfd))->sdt_note_head;
9897 cur->size = (bfd_size_type) note->descsz;
9898 memcpy (cur->data, note->descdata, note->descsz);
9900 elf_tdata (abfd)->sdt_note_head = cur;
9906 elfobj_grok_stapsdt_note (bfd *abfd, Elf_Internal_Note *note)
9911 return elfobj_grok_stapsdt_note_1 (abfd, note);
9919 elfcore_grok_freebsd_psinfo (bfd *abfd, Elf_Internal_Note *note)
9923 switch (elf_elfheader (abfd)->e_ident[EI_CLASS])
9926 if (note->descsz < 108)
9931 if (note->descsz < 120)
9939 /* Check for version 1 in pr_version. */
9940 if (bfd_h_get_32 (abfd, (bfd_byte *) note->descdata) != 1)
9945 /* Skip over pr_psinfosz. */
9946 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS32)
9950 offset += 4; /* Padding before pr_psinfosz. */
9954 /* pr_fname is PRFNAMESZ (16) + 1 bytes in size. */
9955 elf_tdata (abfd)->core->program
9956 = _bfd_elfcore_strndup (abfd, note->descdata + offset, 17);
9959 /* pr_psargs is PRARGSZ (80) + 1 bytes in size. */
9960 elf_tdata (abfd)->core->command
9961 = _bfd_elfcore_strndup (abfd, note->descdata + offset, 81);
9964 /* Padding before pr_pid. */
9967 /* The pr_pid field was added in version "1a". */
9968 if (note->descsz < offset + 4)
9971 elf_tdata (abfd)->core->pid
9972 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
9978 elfcore_grok_freebsd_prstatus (bfd *abfd, Elf_Internal_Note *note)
9984 /* Compute offset of pr_getregsz, skipping over pr_statussz.
9985 Also compute minimum size of this note. */
9986 switch (elf_elfheader (abfd)->e_ident[EI_CLASS])
9990 min_size = offset + (4 * 2) + 4 + 4 + 4;
9994 offset = 4 + 4 + 8; /* Includes padding before pr_statussz. */
9995 min_size = offset + (8 * 2) + 4 + 4 + 4 + 4;
10002 if (note->descsz < min_size)
10005 /* Check for version 1 in pr_version. */
10006 if (bfd_h_get_32 (abfd, (bfd_byte *) note->descdata) != 1)
10009 /* Extract size of pr_reg from pr_gregsetsz. */
10010 /* Skip over pr_gregsetsz and pr_fpregsetsz. */
10011 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS32)
10013 size = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
10018 size = bfd_h_get_64 (abfd, (bfd_byte *) note->descdata + offset);
10022 /* Skip over pr_osreldate. */
10025 /* Read signal from pr_cursig. */
10026 if (elf_tdata (abfd)->core->signal == 0)
10027 elf_tdata (abfd)->core->signal
10028 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
10031 /* Read TID from pr_pid. */
10032 elf_tdata (abfd)->core->lwpid
10033 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
10036 /* Padding before pr_reg. */
10037 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS64)
10040 /* Make sure that there is enough data remaining in the note. */
10041 if ((note->descsz - offset) < size)
10044 /* Make a ".reg/999" section and a ".reg" section. */
10045 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
10046 size, note->descpos + offset);
10050 elfcore_grok_freebsd_note (bfd *abfd, Elf_Internal_Note *note)
10052 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10054 switch (note->type)
10057 if (bed->elf_backend_grok_freebsd_prstatus)
10058 if ((*bed->elf_backend_grok_freebsd_prstatus) (abfd, note))
10060 return elfcore_grok_freebsd_prstatus (abfd, note);
10063 return elfcore_grok_prfpreg (abfd, note);
10066 return elfcore_grok_freebsd_psinfo (abfd, note);
10068 case NT_FREEBSD_THRMISC:
10069 if (note->namesz == 8)
10070 return elfcore_make_note_pseudosection (abfd, ".thrmisc", note);
10074 case NT_FREEBSD_PROCSTAT_PROC:
10075 return elfcore_make_note_pseudosection (abfd, ".note.freebsdcore.proc",
10078 case NT_FREEBSD_PROCSTAT_FILES:
10079 return elfcore_make_note_pseudosection (abfd, ".note.freebsdcore.files",
10082 case NT_FREEBSD_PROCSTAT_VMMAP:
10083 return elfcore_make_note_pseudosection (abfd, ".note.freebsdcore.vmmap",
10086 case NT_FREEBSD_PROCSTAT_AUXV:
10088 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
10093 sect->size = note->descsz - 4;
10094 sect->filepos = note->descpos + 4;
10095 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
10100 case NT_X86_XSTATE:
10101 if (note->namesz == 8)
10102 return elfcore_grok_xstatereg (abfd, note);
10106 case NT_FREEBSD_PTLWPINFO:
10107 return elfcore_make_note_pseudosection (abfd, ".note.freebsdcore.lwpinfo",
10111 return elfcore_grok_arm_vfp (abfd, note);
10119 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
10123 cp = strchr (note->namedata, '@');
10126 *lwpidp = atoi(cp + 1);
10133 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
10135 if (note->descsz <= 0x7c + 31)
10138 /* Signal number at offset 0x08. */
10139 elf_tdata (abfd)->core->signal
10140 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
10142 /* Process ID at offset 0x50. */
10143 elf_tdata (abfd)->core->pid
10144 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
10146 /* Command name at 0x7c (max 32 bytes, including nul). */
10147 elf_tdata (abfd)->core->command
10148 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
10150 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
10155 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
10159 if (elfcore_netbsd_get_lwpid (note, &lwp))
10160 elf_tdata (abfd)->core->lwpid = lwp;
10162 if (note->type == NT_NETBSDCORE_PROCINFO)
10164 /* NetBSD-specific core "procinfo". Note that we expect to
10165 find this note before any of the others, which is fine,
10166 since the kernel writes this note out first when it
10167 creates a core file. */
10169 return elfcore_grok_netbsd_procinfo (abfd, note);
10172 /* As of Jan 2002 there are no other machine-independent notes
10173 defined for NetBSD core files. If the note type is less
10174 than the start of the machine-dependent note types, we don't
10177 if (note->type < NT_NETBSDCORE_FIRSTMACH)
10181 switch (bfd_get_arch (abfd))
10183 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
10184 PT_GETFPREGS == mach+2. */
10186 case bfd_arch_alpha:
10187 case bfd_arch_sparc:
10188 switch (note->type)
10190 case NT_NETBSDCORE_FIRSTMACH+0:
10191 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10193 case NT_NETBSDCORE_FIRSTMACH+2:
10194 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10200 /* On all other arch's, PT_GETREGS == mach+1 and
10201 PT_GETFPREGS == mach+3. */
10204 switch (note->type)
10206 case NT_NETBSDCORE_FIRSTMACH+1:
10207 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10209 case NT_NETBSDCORE_FIRSTMACH+3:
10210 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10220 elfcore_grok_openbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
10222 if (note->descsz <= 0x48 + 31)
10225 /* Signal number at offset 0x08. */
10226 elf_tdata (abfd)->core->signal
10227 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
10229 /* Process ID at offset 0x20. */
10230 elf_tdata (abfd)->core->pid
10231 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x20);
10233 /* Command name at 0x48 (max 32 bytes, including nul). */
10234 elf_tdata (abfd)->core->command
10235 = _bfd_elfcore_strndup (abfd, note->descdata + 0x48, 31);
10241 elfcore_grok_openbsd_note (bfd *abfd, Elf_Internal_Note *note)
10243 if (note->type == NT_OPENBSD_PROCINFO)
10244 return elfcore_grok_openbsd_procinfo (abfd, note);
10246 if (note->type == NT_OPENBSD_REGS)
10247 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10249 if (note->type == NT_OPENBSD_FPREGS)
10250 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10252 if (note->type == NT_OPENBSD_XFPREGS)
10253 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
10255 if (note->type == NT_OPENBSD_AUXV)
10257 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
10262 sect->size = note->descsz;
10263 sect->filepos = note->descpos;
10264 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
10269 if (note->type == NT_OPENBSD_WCOOKIE)
10271 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
10276 sect->size = note->descsz;
10277 sect->filepos = note->descpos;
10278 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
10287 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
10289 void *ddata = note->descdata;
10296 if (note->descsz < 16)
10299 /* nto_procfs_status 'pid' field is at offset 0. */
10300 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
10302 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
10303 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
10305 /* nto_procfs_status 'flags' field is at offset 8. */
10306 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
10308 /* nto_procfs_status 'what' field is at offset 14. */
10309 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
10311 elf_tdata (abfd)->core->signal = sig;
10312 elf_tdata (abfd)->core->lwpid = *tid;
10315 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
10316 do not come from signals so we make sure we set the current
10317 thread just in case. */
10318 if (flags & 0x00000080)
10319 elf_tdata (abfd)->core->lwpid = *tid;
10321 /* Make a ".qnx_core_status/%d" section. */
10322 sprintf (buf, ".qnx_core_status/%ld", *tid);
10324 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
10327 strcpy (name, buf);
10329 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10333 sect->size = note->descsz;
10334 sect->filepos = note->descpos;
10335 sect->alignment_power = 2;
10337 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
10341 elfcore_grok_nto_regs (bfd *abfd,
10342 Elf_Internal_Note *note,
10350 /* Make a "(base)/%d" section. */
10351 sprintf (buf, "%s/%ld", base, tid);
10353 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
10356 strcpy (name, buf);
10358 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10362 sect->size = note->descsz;
10363 sect->filepos = note->descpos;
10364 sect->alignment_power = 2;
10366 /* This is the current thread. */
10367 if (elf_tdata (abfd)->core->lwpid == tid)
10368 return elfcore_maybe_make_sect (abfd, base, sect);
10373 #define BFD_QNT_CORE_INFO 7
10374 #define BFD_QNT_CORE_STATUS 8
10375 #define BFD_QNT_CORE_GREG 9
10376 #define BFD_QNT_CORE_FPREG 10
10379 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
10381 /* Every GREG section has a STATUS section before it. Store the
10382 tid from the previous call to pass down to the next gregs
10384 static long tid = 1;
10386 switch (note->type)
10388 case BFD_QNT_CORE_INFO:
10389 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
10390 case BFD_QNT_CORE_STATUS:
10391 return elfcore_grok_nto_status (abfd, note, &tid);
10392 case BFD_QNT_CORE_GREG:
10393 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
10394 case BFD_QNT_CORE_FPREG:
10395 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
10402 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
10408 /* Use note name as section name. */
10409 len = note->namesz;
10410 name = (char *) bfd_alloc (abfd, len);
10413 memcpy (name, note->namedata, len);
10414 name[len - 1] = '\0';
10416 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10420 sect->size = note->descsz;
10421 sect->filepos = note->descpos;
10422 sect->alignment_power = 1;
10427 /* Function: elfcore_write_note
10430 buffer to hold note, and current size of buffer
10434 size of data for note
10436 Writes note to end of buffer. ELF64 notes are written exactly as
10437 for ELF32, despite the current (as of 2006) ELF gabi specifying
10438 that they ought to have 8-byte namesz and descsz field, and have
10439 8-byte alignment. Other writers, eg. Linux kernel, do the same.
10442 Pointer to realloc'd buffer, *BUFSIZ updated. */
10445 elfcore_write_note (bfd *abfd,
10453 Elf_External_Note *xnp;
10460 namesz = strlen (name) + 1;
10462 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
10464 buf = (char *) realloc (buf, *bufsiz + newspace);
10467 dest = buf + *bufsiz;
10468 *bufsiz += newspace;
10469 xnp = (Elf_External_Note *) dest;
10470 H_PUT_32 (abfd, namesz, xnp->namesz);
10471 H_PUT_32 (abfd, size, xnp->descsz);
10472 H_PUT_32 (abfd, type, xnp->type);
10476 memcpy (dest, name, namesz);
10484 memcpy (dest, input, size);
10495 elfcore_write_prpsinfo (bfd *abfd,
10499 const char *psargs)
10501 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10503 if (bed->elf_backend_write_core_note != NULL)
10506 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
10507 NT_PRPSINFO, fname, psargs);
10512 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
10513 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
10514 if (bed->s->elfclass == ELFCLASS32)
10516 #if defined (HAVE_PSINFO32_T)
10518 int note_type = NT_PSINFO;
10521 int note_type = NT_PRPSINFO;
10524 memset (&data, 0, sizeof (data));
10525 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
10526 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
10527 return elfcore_write_note (abfd, buf, bufsiz,
10528 "CORE", note_type, &data, sizeof (data));
10533 #if defined (HAVE_PSINFO_T)
10535 int note_type = NT_PSINFO;
10538 int note_type = NT_PRPSINFO;
10541 memset (&data, 0, sizeof (data));
10542 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
10543 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
10544 return elfcore_write_note (abfd, buf, bufsiz,
10545 "CORE", note_type, &data, sizeof (data));
10547 #endif /* PSINFO_T or PRPSINFO_T */
10554 elfcore_write_linux_prpsinfo32
10555 (bfd *abfd, char *buf, int *bufsiz,
10556 const struct elf_internal_linux_prpsinfo *prpsinfo)
10558 if (get_elf_backend_data (abfd)->linux_prpsinfo32_ugid16)
10560 struct elf_external_linux_prpsinfo32_ugid16 data;
10562 swap_linux_prpsinfo32_ugid16_out (abfd, prpsinfo, &data);
10563 return elfcore_write_note (abfd, buf, bufsiz, "CORE", NT_PRPSINFO,
10564 &data, sizeof (data));
10568 struct elf_external_linux_prpsinfo32_ugid32 data;
10570 swap_linux_prpsinfo32_ugid32_out (abfd, prpsinfo, &data);
10571 return elfcore_write_note (abfd, buf, bufsiz, "CORE", NT_PRPSINFO,
10572 &data, sizeof (data));
10577 elfcore_write_linux_prpsinfo64
10578 (bfd *abfd, char *buf, int *bufsiz,
10579 const struct elf_internal_linux_prpsinfo *prpsinfo)
10581 if (get_elf_backend_data (abfd)->linux_prpsinfo64_ugid16)
10583 struct elf_external_linux_prpsinfo64_ugid16 data;
10585 swap_linux_prpsinfo64_ugid16_out (abfd, prpsinfo, &data);
10586 return elfcore_write_note (abfd, buf, bufsiz,
10587 "CORE", NT_PRPSINFO, &data, sizeof (data));
10591 struct elf_external_linux_prpsinfo64_ugid32 data;
10593 swap_linux_prpsinfo64_ugid32_out (abfd, prpsinfo, &data);
10594 return elfcore_write_note (abfd, buf, bufsiz,
10595 "CORE", NT_PRPSINFO, &data, sizeof (data));
10600 elfcore_write_prstatus (bfd *abfd,
10607 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10609 if (bed->elf_backend_write_core_note != NULL)
10612 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
10614 pid, cursig, gregs);
10619 #if defined (HAVE_PRSTATUS_T)
10620 #if defined (HAVE_PRSTATUS32_T)
10621 if (bed->s->elfclass == ELFCLASS32)
10623 prstatus32_t prstat;
10625 memset (&prstat, 0, sizeof (prstat));
10626 prstat.pr_pid = pid;
10627 prstat.pr_cursig = cursig;
10628 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
10629 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
10630 NT_PRSTATUS, &prstat, sizeof (prstat));
10637 memset (&prstat, 0, sizeof (prstat));
10638 prstat.pr_pid = pid;
10639 prstat.pr_cursig = cursig;
10640 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
10641 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
10642 NT_PRSTATUS, &prstat, sizeof (prstat));
10644 #endif /* HAVE_PRSTATUS_T */
10650 #if defined (HAVE_LWPSTATUS_T)
10652 elfcore_write_lwpstatus (bfd *abfd,
10659 lwpstatus_t lwpstat;
10660 const char *note_name = "CORE";
10662 memset (&lwpstat, 0, sizeof (lwpstat));
10663 lwpstat.pr_lwpid = pid >> 16;
10664 lwpstat.pr_cursig = cursig;
10665 #if defined (HAVE_LWPSTATUS_T_PR_REG)
10666 memcpy (&lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
10667 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
10668 #if !defined(gregs)
10669 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
10670 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
10672 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
10673 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
10676 return elfcore_write_note (abfd, buf, bufsiz, note_name,
10677 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
10679 #endif /* HAVE_LWPSTATUS_T */
10681 #if defined (HAVE_PSTATUS_T)
10683 elfcore_write_pstatus (bfd *abfd,
10687 int cursig ATTRIBUTE_UNUSED,
10688 const void *gregs ATTRIBUTE_UNUSED)
10690 const char *note_name = "CORE";
10691 #if defined (HAVE_PSTATUS32_T)
10692 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10694 if (bed->s->elfclass == ELFCLASS32)
10698 memset (&pstat, 0, sizeof (pstat));
10699 pstat.pr_pid = pid & 0xffff;
10700 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
10701 NT_PSTATUS, &pstat, sizeof (pstat));
10709 memset (&pstat, 0, sizeof (pstat));
10710 pstat.pr_pid = pid & 0xffff;
10711 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
10712 NT_PSTATUS, &pstat, sizeof (pstat));
10716 #endif /* HAVE_PSTATUS_T */
10719 elfcore_write_prfpreg (bfd *abfd,
10722 const void *fpregs,
10725 const char *note_name = "CORE";
10726 return elfcore_write_note (abfd, buf, bufsiz,
10727 note_name, NT_FPREGSET, fpregs, size);
10731 elfcore_write_prxfpreg (bfd *abfd,
10734 const void *xfpregs,
10737 char *note_name = "LINUX";
10738 return elfcore_write_note (abfd, buf, bufsiz,
10739 note_name, NT_PRXFPREG, xfpregs, size);
10743 elfcore_write_xstatereg (bfd *abfd, char *buf, int *bufsiz,
10744 const void *xfpregs, int size)
10747 if (get_elf_backend_data (abfd)->elf_osabi == ELFOSABI_FREEBSD)
10748 note_name = "FreeBSD";
10750 note_name = "LINUX";
10751 return elfcore_write_note (abfd, buf, bufsiz,
10752 note_name, NT_X86_XSTATE, xfpregs, size);
10756 elfcore_write_ppc_vmx (bfd *abfd,
10759 const void *ppc_vmx,
10762 char *note_name = "LINUX";
10763 return elfcore_write_note (abfd, buf, bufsiz,
10764 note_name, NT_PPC_VMX, ppc_vmx, size);
10768 elfcore_write_ppc_vsx (bfd *abfd,
10771 const void *ppc_vsx,
10774 char *note_name = "LINUX";
10775 return elfcore_write_note (abfd, buf, bufsiz,
10776 note_name, NT_PPC_VSX, ppc_vsx, size);
10780 elfcore_write_s390_high_gprs (bfd *abfd,
10783 const void *s390_high_gprs,
10786 char *note_name = "LINUX";
10787 return elfcore_write_note (abfd, buf, bufsiz,
10788 note_name, NT_S390_HIGH_GPRS,
10789 s390_high_gprs, size);
10793 elfcore_write_s390_timer (bfd *abfd,
10796 const void *s390_timer,
10799 char *note_name = "LINUX";
10800 return elfcore_write_note (abfd, buf, bufsiz,
10801 note_name, NT_S390_TIMER, s390_timer, size);
10805 elfcore_write_s390_todcmp (bfd *abfd,
10808 const void *s390_todcmp,
10811 char *note_name = "LINUX";
10812 return elfcore_write_note (abfd, buf, bufsiz,
10813 note_name, NT_S390_TODCMP, s390_todcmp, size);
10817 elfcore_write_s390_todpreg (bfd *abfd,
10820 const void *s390_todpreg,
10823 char *note_name = "LINUX";
10824 return elfcore_write_note (abfd, buf, bufsiz,
10825 note_name, NT_S390_TODPREG, s390_todpreg, size);
10829 elfcore_write_s390_ctrs (bfd *abfd,
10832 const void *s390_ctrs,
10835 char *note_name = "LINUX";
10836 return elfcore_write_note (abfd, buf, bufsiz,
10837 note_name, NT_S390_CTRS, s390_ctrs, size);
10841 elfcore_write_s390_prefix (bfd *abfd,
10844 const void *s390_prefix,
10847 char *note_name = "LINUX";
10848 return elfcore_write_note (abfd, buf, bufsiz,
10849 note_name, NT_S390_PREFIX, s390_prefix, size);
10853 elfcore_write_s390_last_break (bfd *abfd,
10856 const void *s390_last_break,
10859 char *note_name = "LINUX";
10860 return elfcore_write_note (abfd, buf, bufsiz,
10861 note_name, NT_S390_LAST_BREAK,
10862 s390_last_break, size);
10866 elfcore_write_s390_system_call (bfd *abfd,
10869 const void *s390_system_call,
10872 char *note_name = "LINUX";
10873 return elfcore_write_note (abfd, buf, bufsiz,
10874 note_name, NT_S390_SYSTEM_CALL,
10875 s390_system_call, size);
10879 elfcore_write_s390_tdb (bfd *abfd,
10882 const void *s390_tdb,
10885 char *note_name = "LINUX";
10886 return elfcore_write_note (abfd, buf, bufsiz,
10887 note_name, NT_S390_TDB, s390_tdb, size);
10891 elfcore_write_s390_vxrs_low (bfd *abfd,
10894 const void *s390_vxrs_low,
10897 char *note_name = "LINUX";
10898 return elfcore_write_note (abfd, buf, bufsiz,
10899 note_name, NT_S390_VXRS_LOW, s390_vxrs_low, size);
10903 elfcore_write_s390_vxrs_high (bfd *abfd,
10906 const void *s390_vxrs_high,
10909 char *note_name = "LINUX";
10910 return elfcore_write_note (abfd, buf, bufsiz,
10911 note_name, NT_S390_VXRS_HIGH,
10912 s390_vxrs_high, size);
10916 elfcore_write_s390_gs_cb (bfd *abfd,
10919 const void *s390_gs_cb,
10922 char *note_name = "LINUX";
10923 return elfcore_write_note (abfd, buf, bufsiz,
10924 note_name, NT_S390_GS_CB,
10929 elfcore_write_s390_gs_bc (bfd *abfd,
10932 const void *s390_gs_bc,
10935 char *note_name = "LINUX";
10936 return elfcore_write_note (abfd, buf, bufsiz,
10937 note_name, NT_S390_GS_BC,
10942 elfcore_write_arm_vfp (bfd *abfd,
10945 const void *arm_vfp,
10948 char *note_name = "LINUX";
10949 return elfcore_write_note (abfd, buf, bufsiz,
10950 note_name, NT_ARM_VFP, arm_vfp, size);
10954 elfcore_write_aarch_tls (bfd *abfd,
10957 const void *aarch_tls,
10960 char *note_name = "LINUX";
10961 return elfcore_write_note (abfd, buf, bufsiz,
10962 note_name, NT_ARM_TLS, aarch_tls, size);
10966 elfcore_write_aarch_hw_break (bfd *abfd,
10969 const void *aarch_hw_break,
10972 char *note_name = "LINUX";
10973 return elfcore_write_note (abfd, buf, bufsiz,
10974 note_name, NT_ARM_HW_BREAK, aarch_hw_break, size);
10978 elfcore_write_aarch_hw_watch (bfd *abfd,
10981 const void *aarch_hw_watch,
10984 char *note_name = "LINUX";
10985 return elfcore_write_note (abfd, buf, bufsiz,
10986 note_name, NT_ARM_HW_WATCH, aarch_hw_watch, size);
10990 elfcore_write_register_note (bfd *abfd,
10993 const char *section,
10997 if (strcmp (section, ".reg2") == 0)
10998 return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size);
10999 if (strcmp (section, ".reg-xfp") == 0)
11000 return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
11001 if (strcmp (section, ".reg-xstate") == 0)
11002 return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size);
11003 if (strcmp (section, ".reg-ppc-vmx") == 0)
11004 return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
11005 if (strcmp (section, ".reg-ppc-vsx") == 0)
11006 return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size);
11007 if (strcmp (section, ".reg-s390-high-gprs") == 0)
11008 return elfcore_write_s390_high_gprs (abfd, buf, bufsiz, data, size);
11009 if (strcmp (section, ".reg-s390-timer") == 0)
11010 return elfcore_write_s390_timer (abfd, buf, bufsiz, data, size);
11011 if (strcmp (section, ".reg-s390-todcmp") == 0)
11012 return elfcore_write_s390_todcmp (abfd, buf, bufsiz, data, size);
11013 if (strcmp (section, ".reg-s390-todpreg") == 0)
11014 return elfcore_write_s390_todpreg (abfd, buf, bufsiz, data, size);
11015 if (strcmp (section, ".reg-s390-ctrs") == 0)
11016 return elfcore_write_s390_ctrs (abfd, buf, bufsiz, data, size);
11017 if (strcmp (section, ".reg-s390-prefix") == 0)
11018 return elfcore_write_s390_prefix (abfd, buf, bufsiz, data, size);
11019 if (strcmp (section, ".reg-s390-last-break") == 0)
11020 return elfcore_write_s390_last_break (abfd, buf, bufsiz, data, size);
11021 if (strcmp (section, ".reg-s390-system-call") == 0)
11022 return elfcore_write_s390_system_call (abfd, buf, bufsiz, data, size);
11023 if (strcmp (section, ".reg-s390-tdb") == 0)
11024 return elfcore_write_s390_tdb (abfd, buf, bufsiz, data, size);
11025 if (strcmp (section, ".reg-s390-vxrs-low") == 0)
11026 return elfcore_write_s390_vxrs_low (abfd, buf, bufsiz, data, size);
11027 if (strcmp (section, ".reg-s390-vxrs-high") == 0)
11028 return elfcore_write_s390_vxrs_high (abfd, buf, bufsiz, data, size);
11029 if (strcmp (section, ".reg-s390-gs-cb") == 0)
11030 return elfcore_write_s390_gs_cb (abfd, buf, bufsiz, data, size);
11031 if (strcmp (section, ".reg-s390-gs-bc") == 0)
11032 return elfcore_write_s390_gs_bc (abfd, buf, bufsiz, data, size);
11033 if (strcmp (section, ".reg-arm-vfp") == 0)
11034 return elfcore_write_arm_vfp (abfd, buf, bufsiz, data, size);
11035 if (strcmp (section, ".reg-aarch-tls") == 0)
11036 return elfcore_write_aarch_tls (abfd, buf, bufsiz, data, size);
11037 if (strcmp (section, ".reg-aarch-hw-break") == 0)
11038 return elfcore_write_aarch_hw_break (abfd, buf, bufsiz, data, size);
11039 if (strcmp (section, ".reg-aarch-hw-watch") == 0)
11040 return elfcore_write_aarch_hw_watch (abfd, buf, bufsiz, data, size);
11045 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset,
11050 /* NB: CORE PT_NOTE segments may have p_align values of 0 or 1.
11051 gABI specifies that PT_NOTE alignment should be aligned to 4
11052 bytes for 32-bit objects and to 8 bytes for 64-bit objects. If
11053 align is less than 4, we use 4 byte alignment. */
11056 if (align != 4 && align != 8)
11060 while (p < buf + size)
11062 Elf_External_Note *xnp = (Elf_External_Note *) p;
11063 Elf_Internal_Note in;
11065 if (offsetof (Elf_External_Note, name) > buf - p + size)
11068 in.type = H_GET_32 (abfd, xnp->type);
11070 in.namesz = H_GET_32 (abfd, xnp->namesz);
11071 in.namedata = xnp->name;
11072 if (in.namesz > buf - in.namedata + size)
11075 in.descsz = H_GET_32 (abfd, xnp->descsz);
11076 in.descdata = p + ELF_NOTE_DESC_OFFSET (in.namesz, align);
11077 in.descpos = offset + (in.descdata - buf);
11079 && (in.descdata >= buf + size
11080 || in.descsz > buf - in.descdata + size))
11083 switch (bfd_get_format (abfd))
11090 #define GROKER_ELEMENT(S,F) {S, sizeof (S) - 1, F}
11093 const char * string;
11095 bfd_boolean (* func)(bfd *, Elf_Internal_Note *);
11099 GROKER_ELEMENT ("", elfcore_grok_note),
11100 GROKER_ELEMENT ("FreeBSD", elfcore_grok_freebsd_note),
11101 GROKER_ELEMENT ("NetBSD-CORE", elfcore_grok_netbsd_note),
11102 GROKER_ELEMENT ( "OpenBSD", elfcore_grok_openbsd_note),
11103 GROKER_ELEMENT ("QNX", elfcore_grok_nto_note),
11104 GROKER_ELEMENT ("SPU/", elfcore_grok_spu_note)
11106 #undef GROKER_ELEMENT
11109 for (i = ARRAY_SIZE (grokers); i--;)
11111 if (in.namesz >= grokers[i].len
11112 && strncmp (in.namedata, grokers[i].string,
11113 grokers[i].len) == 0)
11115 if (! grokers[i].func (abfd, & in))
11124 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
11126 if (! elfobj_grok_gnu_note (abfd, &in))
11129 else if (in.namesz == sizeof "stapsdt"
11130 && strcmp (in.namedata, "stapsdt") == 0)
11132 if (! elfobj_grok_stapsdt_note (abfd, &in))
11138 p += ELF_NOTE_NEXT_OFFSET (in.namesz, in.descsz, align);
11145 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size,
11150 if (size == 0 || (size + 1) == 0)
11153 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
11156 buf = (char *) bfd_malloc (size + 1);
11160 /* PR 17512: file: ec08f814
11161 0-termintate the buffer so that string searches will not overflow. */
11164 if (bfd_bread (buf, size, abfd) != size
11165 || !elf_parse_notes (abfd, buf, size, offset, align))
11175 /* Providing external access to the ELF program header table. */
11177 /* Return an upper bound on the number of bytes required to store a
11178 copy of ABFD's program header table entries. Return -1 if an error
11179 occurs; bfd_get_error will return an appropriate code. */
11182 bfd_get_elf_phdr_upper_bound (bfd *abfd)
11184 if (abfd->xvec->flavour != bfd_target_elf_flavour)
11186 bfd_set_error (bfd_error_wrong_format);
11190 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
11193 /* Copy ABFD's program header table entries to *PHDRS. The entries
11194 will be stored as an array of Elf_Internal_Phdr structures, as
11195 defined in include/elf/internal.h. To find out how large the
11196 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
11198 Return the number of program header table entries read, or -1 if an
11199 error occurs; bfd_get_error will return an appropriate code. */
11202 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
11206 if (abfd->xvec->flavour != bfd_target_elf_flavour)
11208 bfd_set_error (bfd_error_wrong_format);
11212 num_phdrs = elf_elfheader (abfd)->e_phnum;
11213 memcpy (phdrs, elf_tdata (abfd)->phdr,
11214 num_phdrs * sizeof (Elf_Internal_Phdr));
11219 enum elf_reloc_type_class
11220 _bfd_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
11221 const asection *rel_sec ATTRIBUTE_UNUSED,
11222 const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
11224 return reloc_class_normal;
11227 /* For RELA architectures, return the relocation value for a
11228 relocation against a local symbol. */
11231 _bfd_elf_rela_local_sym (bfd *abfd,
11232 Elf_Internal_Sym *sym,
11234 Elf_Internal_Rela *rel)
11236 asection *sec = *psec;
11237 bfd_vma relocation;
11239 relocation = (sec->output_section->vma
11240 + sec->output_offset
11242 if ((sec->flags & SEC_MERGE)
11243 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
11244 && sec->sec_info_type == SEC_INFO_TYPE_MERGE)
11247 _bfd_merged_section_offset (abfd, psec,
11248 elf_section_data (sec)->sec_info,
11249 sym->st_value + rel->r_addend);
11252 /* If we have changed the section, and our original section is
11253 marked with SEC_EXCLUDE, it means that the original
11254 SEC_MERGE section has been completely subsumed in some
11255 other SEC_MERGE section. In this case, we need to leave
11256 some info around for --emit-relocs. */
11257 if ((sec->flags & SEC_EXCLUDE) != 0)
11258 sec->kept_section = *psec;
11261 rel->r_addend -= relocation;
11262 rel->r_addend += sec->output_section->vma + sec->output_offset;
11268 _bfd_elf_rel_local_sym (bfd *abfd,
11269 Elf_Internal_Sym *sym,
11273 asection *sec = *psec;
11275 if (sec->sec_info_type != SEC_INFO_TYPE_MERGE)
11276 return sym->st_value + addend;
11278 return _bfd_merged_section_offset (abfd, psec,
11279 elf_section_data (sec)->sec_info,
11280 sym->st_value + addend);
11283 /* Adjust an address within a section. Given OFFSET within SEC, return
11284 the new offset within the section, based upon changes made to the
11285 section. Returns -1 if the offset is now invalid.
11286 The offset (in abnd out) is in target sized bytes, however big a
11290 _bfd_elf_section_offset (bfd *abfd,
11291 struct bfd_link_info *info,
11295 switch (sec->sec_info_type)
11297 case SEC_INFO_TYPE_STABS:
11298 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
11300 case SEC_INFO_TYPE_EH_FRAME:
11301 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
11304 if ((sec->flags & SEC_ELF_REVERSE_COPY) != 0)
11306 /* Reverse the offset. */
11307 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
11308 bfd_size_type address_size = bed->s->arch_size / 8;
11310 /* address_size and sec->size are in octets. Convert
11311 to bytes before subtracting the original offset. */
11312 offset = (sec->size - address_size) / bfd_octets_per_byte (abfd) - offset;
11318 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
11319 reconstruct an ELF file by reading the segments out of remote memory
11320 based on the ELF file header at EHDR_VMA and the ELF program headers it
11321 points to. If not null, *LOADBASEP is filled in with the difference
11322 between the VMAs from which the segments were read, and the VMAs the
11323 file headers (and hence BFD's idea of each section's VMA) put them at.
11325 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
11326 remote memory at target address VMA into the local buffer at MYADDR; it
11327 should return zero on success or an `errno' code on failure. TEMPL must
11328 be a BFD for an ELF target with the word size and byte order found in
11329 the remote memory. */
11332 bfd_elf_bfd_from_remote_memory
11335 bfd_size_type size,
11336 bfd_vma *loadbasep,
11337 int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type))
11339 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
11340 (templ, ehdr_vma, size, loadbasep, target_read_memory);
11344 _bfd_elf_get_synthetic_symtab (bfd *abfd,
11345 long symcount ATTRIBUTE_UNUSED,
11346 asymbol **syms ATTRIBUTE_UNUSED,
11351 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
11354 const char *relplt_name;
11355 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
11359 Elf_Internal_Shdr *hdr;
11365 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
11368 if (dynsymcount <= 0)
11371 if (!bed->plt_sym_val)
11374 relplt_name = bed->relplt_name;
11375 if (relplt_name == NULL)
11376 relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt";
11377 relplt = bfd_get_section_by_name (abfd, relplt_name);
11378 if (relplt == NULL)
11381 hdr = &elf_section_data (relplt)->this_hdr;
11382 if (hdr->sh_link != elf_dynsymtab (abfd)
11383 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
11386 plt = bfd_get_section_by_name (abfd, ".plt");
11390 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
11391 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
11394 count = relplt->size / hdr->sh_entsize;
11395 size = count * sizeof (asymbol);
11396 p = relplt->relocation;
11397 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
11399 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
11400 if (p->addend != 0)
11403 size += sizeof ("+0x") - 1 + 8 + 8 * (bed->s->elfclass == ELFCLASS64);
11405 size += sizeof ("+0x") - 1 + 8;
11410 s = *ret = (asymbol *) bfd_malloc (size);
11414 names = (char *) (s + count);
11415 p = relplt->relocation;
11417 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
11422 addr = bed->plt_sym_val (i, plt, p);
11423 if (addr == (bfd_vma) -1)
11426 *s = **p->sym_ptr_ptr;
11427 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
11428 we are defining a symbol, ensure one of them is set. */
11429 if ((s->flags & BSF_LOCAL) == 0)
11430 s->flags |= BSF_GLOBAL;
11431 s->flags |= BSF_SYNTHETIC;
11433 s->value = addr - plt->vma;
11436 len = strlen ((*p->sym_ptr_ptr)->name);
11437 memcpy (names, (*p->sym_ptr_ptr)->name, len);
11439 if (p->addend != 0)
11443 memcpy (names, "+0x", sizeof ("+0x") - 1);
11444 names += sizeof ("+0x") - 1;
11445 bfd_sprintf_vma (abfd, buf, p->addend);
11446 for (a = buf; *a == '0'; ++a)
11449 memcpy (names, a, len);
11452 memcpy (names, "@plt", sizeof ("@plt"));
11453 names += sizeof ("@plt");
11460 /* It is only used by x86-64 so far.
11461 ??? This repeats *COM* id of zero. sec->id is supposed to be unique,
11462 but current usage would allow all of _bfd_std_section to be zero. */
11463 static const asymbol lcomm_sym
11464 = GLOBAL_SYM_INIT ("LARGE_COMMON", &_bfd_elf_large_com_section);
11465 asection _bfd_elf_large_com_section
11466 = BFD_FAKE_SECTION (_bfd_elf_large_com_section, &lcomm_sym,
11467 "LARGE_COMMON", 0, SEC_IS_COMMON);
11470 _bfd_elf_post_process_headers (bfd * abfd,
11471 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
11473 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
11475 i_ehdrp = elf_elfheader (abfd);
11477 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
11479 /* To make things simpler for the loader on Linux systems we set the
11480 osabi field to ELFOSABI_GNU if the binary contains symbols of
11481 the STT_GNU_IFUNC type or STB_GNU_UNIQUE binding. */
11482 if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE
11483 && elf_tdata (abfd)->has_gnu_symbols)
11484 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_GNU;
11488 /* Return TRUE for ELF symbol types that represent functions.
11489 This is the default version of this function, which is sufficient for
11490 most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */
11493 _bfd_elf_is_function_type (unsigned int type)
11495 return (type == STT_FUNC
11496 || type == STT_GNU_IFUNC);
11499 /* If the ELF symbol SYM might be a function in SEC, return the
11500 function size and set *CODE_OFF to the function's entry point,
11501 otherwise return zero. */
11504 _bfd_elf_maybe_function_sym (const asymbol *sym, asection *sec,
11507 bfd_size_type size;
11509 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
11510 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0
11511 || sym->section != sec)
11514 *code_off = sym->value;
11516 if (!(sym->flags & BSF_SYNTHETIC))
11517 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;