1 /* ELF executable support for BFD.
3 Copyright (C) 1993-2017 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) ;
56 static bfd_boolean elf_parse_notes (bfd *abfd, char *buf, size_t size,
59 /* Swap version information in and out. The version information is
60 currently size independent. If that ever changes, this code will
61 need to move into elfcode.h. */
63 /* Swap in a Verdef structure. */
66 _bfd_elf_swap_verdef_in (bfd *abfd,
67 const Elf_External_Verdef *src,
68 Elf_Internal_Verdef *dst)
70 dst->vd_version = H_GET_16 (abfd, src->vd_version);
71 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
72 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
73 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
74 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
75 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
76 dst->vd_next = H_GET_32 (abfd, src->vd_next);
79 /* Swap out a Verdef structure. */
82 _bfd_elf_swap_verdef_out (bfd *abfd,
83 const Elf_Internal_Verdef *src,
84 Elf_External_Verdef *dst)
86 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
87 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
88 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
89 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
90 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
91 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
92 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
95 /* Swap in a Verdaux structure. */
98 _bfd_elf_swap_verdaux_in (bfd *abfd,
99 const Elf_External_Verdaux *src,
100 Elf_Internal_Verdaux *dst)
102 dst->vda_name = H_GET_32 (abfd, src->vda_name);
103 dst->vda_next = H_GET_32 (abfd, src->vda_next);
106 /* Swap out a Verdaux structure. */
109 _bfd_elf_swap_verdaux_out (bfd *abfd,
110 const Elf_Internal_Verdaux *src,
111 Elf_External_Verdaux *dst)
113 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
114 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
117 /* Swap in a Verneed structure. */
120 _bfd_elf_swap_verneed_in (bfd *abfd,
121 const Elf_External_Verneed *src,
122 Elf_Internal_Verneed *dst)
124 dst->vn_version = H_GET_16 (abfd, src->vn_version);
125 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
126 dst->vn_file = H_GET_32 (abfd, src->vn_file);
127 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
128 dst->vn_next = H_GET_32 (abfd, src->vn_next);
131 /* Swap out a Verneed structure. */
134 _bfd_elf_swap_verneed_out (bfd *abfd,
135 const Elf_Internal_Verneed *src,
136 Elf_External_Verneed *dst)
138 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
139 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
140 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
141 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
142 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
145 /* Swap in a Vernaux structure. */
148 _bfd_elf_swap_vernaux_in (bfd *abfd,
149 const Elf_External_Vernaux *src,
150 Elf_Internal_Vernaux *dst)
152 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
153 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
154 dst->vna_other = H_GET_16 (abfd, src->vna_other);
155 dst->vna_name = H_GET_32 (abfd, src->vna_name);
156 dst->vna_next = H_GET_32 (abfd, src->vna_next);
159 /* Swap out a Vernaux structure. */
162 _bfd_elf_swap_vernaux_out (bfd *abfd,
163 const Elf_Internal_Vernaux *src,
164 Elf_External_Vernaux *dst)
166 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
167 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
168 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
169 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
170 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
173 /* Swap in a Versym structure. */
176 _bfd_elf_swap_versym_in (bfd *abfd,
177 const Elf_External_Versym *src,
178 Elf_Internal_Versym *dst)
180 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
183 /* Swap out a Versym structure. */
186 _bfd_elf_swap_versym_out (bfd *abfd,
187 const Elf_Internal_Versym *src,
188 Elf_External_Versym *dst)
190 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
193 /* Standard ELF hash function. Do not change this function; you will
194 cause invalid hash tables to be generated. */
197 bfd_elf_hash (const char *namearg)
199 const unsigned char *name = (const unsigned char *) namearg;
204 while ((ch = *name++) != '\0')
207 if ((g = (h & 0xf0000000)) != 0)
210 /* The ELF ABI says `h &= ~g', but this is equivalent in
211 this case and on some machines one insn instead of two. */
215 return h & 0xffffffff;
218 /* DT_GNU_HASH hash function. Do not change this function; you will
219 cause invalid hash tables to be generated. */
222 bfd_elf_gnu_hash (const char *namearg)
224 const unsigned char *name = (const unsigned char *) namearg;
225 unsigned long h = 5381;
228 while ((ch = *name++) != '\0')
229 h = (h << 5) + h + ch;
230 return h & 0xffffffff;
233 /* Create a tdata field OBJECT_SIZE bytes in length, zeroed out and with
234 the object_id field of an elf_obj_tdata field set to OBJECT_ID. */
236 bfd_elf_allocate_object (bfd *abfd,
238 enum elf_target_id object_id)
240 BFD_ASSERT (object_size >= sizeof (struct elf_obj_tdata));
241 abfd->tdata.any = bfd_zalloc (abfd, object_size);
242 if (abfd->tdata.any == NULL)
245 elf_object_id (abfd) = object_id;
246 if (abfd->direction != read_direction)
248 struct output_elf_obj_tdata *o = bfd_zalloc (abfd, sizeof *o);
251 elf_tdata (abfd)->o = o;
252 elf_program_header_size (abfd) = (bfd_size_type) -1;
259 bfd_elf_make_object (bfd *abfd)
261 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
262 return bfd_elf_allocate_object (abfd, sizeof (struct elf_obj_tdata),
267 bfd_elf_mkcorefile (bfd *abfd)
269 /* I think this can be done just like an object file. */
270 if (!abfd->xvec->_bfd_set_format[(int) bfd_object] (abfd))
272 elf_tdata (abfd)->core = bfd_zalloc (abfd, sizeof (*elf_tdata (abfd)->core));
273 return elf_tdata (abfd)->core != NULL;
277 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
279 Elf_Internal_Shdr **i_shdrp;
280 bfd_byte *shstrtab = NULL;
282 bfd_size_type shstrtabsize;
284 i_shdrp = elf_elfsections (abfd);
286 || shindex >= elf_numsections (abfd)
287 || i_shdrp[shindex] == 0)
290 shstrtab = i_shdrp[shindex]->contents;
291 if (shstrtab == NULL)
293 /* No cached one, attempt to read, and cache what we read. */
294 offset = i_shdrp[shindex]->sh_offset;
295 shstrtabsize = i_shdrp[shindex]->sh_size;
297 /* Allocate and clear an extra byte at the end, to prevent crashes
298 in case the string table is not terminated. */
299 if (shstrtabsize + 1 <= 1
300 || bfd_seek (abfd, offset, SEEK_SET) != 0
301 || (shstrtab = (bfd_byte *) bfd_alloc (abfd, shstrtabsize + 1)) == NULL)
303 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
305 if (bfd_get_error () != bfd_error_system_call)
306 bfd_set_error (bfd_error_file_truncated);
307 bfd_release (abfd, shstrtab);
309 /* Once we've failed to read it, make sure we don't keep
310 trying. Otherwise, we'll keep allocating space for
311 the string table over and over. */
312 i_shdrp[shindex]->sh_size = 0;
315 shstrtab[shstrtabsize] = '\0';
316 i_shdrp[shindex]->contents = shstrtab;
318 return (char *) shstrtab;
322 bfd_elf_string_from_elf_section (bfd *abfd,
323 unsigned int shindex,
324 unsigned int strindex)
326 Elf_Internal_Shdr *hdr;
331 if (elf_elfsections (abfd) == NULL || shindex >= elf_numsections (abfd))
334 hdr = elf_elfsections (abfd)[shindex];
336 if (hdr->contents == NULL)
338 if (hdr->sh_type != SHT_STRTAB && hdr->sh_type < SHT_LOOS)
340 /* PR 17512: file: f057ec89. */
341 /* xgettext:c-format */
342 _bfd_error_handler (_("%B: attempt to load strings from"
343 " a non-string section (number %d)"),
348 if (bfd_elf_get_str_section (abfd, shindex) == NULL)
352 if (strindex >= hdr->sh_size)
354 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
356 /* xgettext:c-format */
357 (_("%B: invalid string offset %u >= %Lu for section `%s'"),
358 abfd, strindex, hdr->sh_size,
359 (shindex == shstrndx && strindex == hdr->sh_name
361 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
365 return ((char *) hdr->contents) + strindex;
368 /* Read and convert symbols to internal format.
369 SYMCOUNT specifies the number of symbols to read, starting from
370 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
371 are non-NULL, they are used to store the internal symbols, external
372 symbols, and symbol section index extensions, respectively.
373 Returns a pointer to the internal symbol buffer (malloced if necessary)
374 or NULL if there were no symbols or some kind of problem. */
377 bfd_elf_get_elf_syms (bfd *ibfd,
378 Elf_Internal_Shdr *symtab_hdr,
381 Elf_Internal_Sym *intsym_buf,
383 Elf_External_Sym_Shndx *extshndx_buf)
385 Elf_Internal_Shdr *shndx_hdr;
387 const bfd_byte *esym;
388 Elf_External_Sym_Shndx *alloc_extshndx;
389 Elf_External_Sym_Shndx *shndx;
390 Elf_Internal_Sym *alloc_intsym;
391 Elf_Internal_Sym *isym;
392 Elf_Internal_Sym *isymend;
393 const struct elf_backend_data *bed;
398 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
404 /* Normal syms might have section extension entries. */
406 if (elf_symtab_shndx_list (ibfd) != NULL)
408 elf_section_list * entry;
409 Elf_Internal_Shdr **sections = elf_elfsections (ibfd);
411 /* Find an index section that is linked to this symtab section. */
412 for (entry = elf_symtab_shndx_list (ibfd); entry != NULL; entry = entry->next)
415 if (entry->hdr.sh_link >= elf_numsections (ibfd))
418 if (sections[entry->hdr.sh_link] == symtab_hdr)
420 shndx_hdr = & entry->hdr;
425 if (shndx_hdr == NULL)
427 if (symtab_hdr == & elf_symtab_hdr (ibfd))
428 /* Not really accurate, but this was how the old code used to work. */
429 shndx_hdr = & elf_symtab_shndx_list (ibfd)->hdr;
430 /* Otherwise we do nothing. The assumption is that
431 the index table will not be needed. */
435 /* Read the symbols. */
437 alloc_extshndx = NULL;
439 bed = get_elf_backend_data (ibfd);
440 extsym_size = bed->s->sizeof_sym;
441 amt = (bfd_size_type) symcount * extsym_size;
442 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
443 if (extsym_buf == NULL)
445 alloc_ext = bfd_malloc2 (symcount, extsym_size);
446 extsym_buf = alloc_ext;
448 if (extsym_buf == NULL
449 || bfd_seek (ibfd, pos, SEEK_SET) != 0
450 || bfd_bread (extsym_buf, amt, ibfd) != amt)
456 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
460 amt = (bfd_size_type) symcount * sizeof (Elf_External_Sym_Shndx);
461 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
462 if (extshndx_buf == NULL)
464 alloc_extshndx = (Elf_External_Sym_Shndx *)
465 bfd_malloc2 (symcount, sizeof (Elf_External_Sym_Shndx));
466 extshndx_buf = alloc_extshndx;
468 if (extshndx_buf == NULL
469 || bfd_seek (ibfd, pos, SEEK_SET) != 0
470 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
477 if (intsym_buf == NULL)
479 alloc_intsym = (Elf_Internal_Sym *)
480 bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
481 intsym_buf = alloc_intsym;
482 if (intsym_buf == NULL)
486 /* Convert the symbols to internal form. */
487 isymend = intsym_buf + symcount;
488 for (esym = (const bfd_byte *) extsym_buf, isym = intsym_buf,
489 shndx = extshndx_buf;
491 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
492 if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym))
494 symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size;
495 /* xgettext:c-format */
496 _bfd_error_handler (_("%B symbol number %lu references"
497 " nonexistent SHT_SYMTAB_SHNDX section"),
498 ibfd, (unsigned long) symoffset);
499 if (alloc_intsym != NULL)
506 if (alloc_ext != NULL)
508 if (alloc_extshndx != NULL)
509 free (alloc_extshndx);
514 /* Look up a symbol name. */
516 bfd_elf_sym_name (bfd *abfd,
517 Elf_Internal_Shdr *symtab_hdr,
518 Elf_Internal_Sym *isym,
522 unsigned int iname = isym->st_name;
523 unsigned int shindex = symtab_hdr->sh_link;
525 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
526 /* Check for a bogus st_shndx to avoid crashing. */
527 && isym->st_shndx < elf_numsections (abfd))
529 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
530 shindex = elf_elfheader (abfd)->e_shstrndx;
533 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
536 else if (sym_sec && *name == '\0')
537 name = bfd_section_name (abfd, sym_sec);
542 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
543 sections. The first element is the flags, the rest are section
546 typedef union elf_internal_group {
547 Elf_Internal_Shdr *shdr;
549 } Elf_Internal_Group;
551 /* Return the name of the group signature symbol. Why isn't the
552 signature just a string? */
555 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
557 Elf_Internal_Shdr *hdr;
558 unsigned char esym[sizeof (Elf64_External_Sym)];
559 Elf_External_Sym_Shndx eshndx;
560 Elf_Internal_Sym isym;
562 /* First we need to ensure the symbol table is available. Make sure
563 that it is a symbol table section. */
564 if (ghdr->sh_link >= elf_numsections (abfd))
566 hdr = elf_elfsections (abfd) [ghdr->sh_link];
567 if (hdr->sh_type != SHT_SYMTAB
568 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
571 /* Go read the symbol. */
572 hdr = &elf_tdata (abfd)->symtab_hdr;
573 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
574 &isym, esym, &eshndx) == NULL)
577 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
580 /* Set next_in_group list pointer, and group name for NEWSECT. */
583 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
585 unsigned int num_group = elf_tdata (abfd)->num_group;
587 /* If num_group is zero, read in all SHT_GROUP sections. The count
588 is set to -1 if there are no SHT_GROUP sections. */
591 unsigned int i, shnum;
593 /* First count the number of groups. If we have a SHT_GROUP
594 section with just a flag word (ie. sh_size is 4), ignore it. */
595 shnum = elf_numsections (abfd);
598 #define IS_VALID_GROUP_SECTION_HEADER(shdr, minsize) \
599 ( (shdr)->sh_type == SHT_GROUP \
600 && (shdr)->sh_size >= minsize \
601 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
602 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
604 for (i = 0; i < shnum; i++)
606 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
608 if (IS_VALID_GROUP_SECTION_HEADER (shdr, 2 * GRP_ENTRY_SIZE))
614 num_group = (unsigned) -1;
615 elf_tdata (abfd)->num_group = num_group;
616 elf_tdata (abfd)->group_sect_ptr = NULL;
620 /* We keep a list of elf section headers for group sections,
621 so we can find them quickly. */
624 elf_tdata (abfd)->num_group = num_group;
625 elf_tdata (abfd)->group_sect_ptr = (Elf_Internal_Shdr **)
626 bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
627 if (elf_tdata (abfd)->group_sect_ptr == NULL)
629 memset (elf_tdata (abfd)->group_sect_ptr, 0, num_group * sizeof (Elf_Internal_Shdr *));
632 for (i = 0; i < shnum; i++)
634 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
636 if (IS_VALID_GROUP_SECTION_HEADER (shdr, 2 * GRP_ENTRY_SIZE))
639 Elf_Internal_Group *dest;
641 /* Make sure the group section has a BFD section
643 if (!bfd_section_from_shdr (abfd, i))
646 /* Add to list of sections. */
647 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
650 /* Read the raw contents. */
651 BFD_ASSERT (sizeof (*dest) >= 4);
652 amt = shdr->sh_size * sizeof (*dest) / 4;
653 shdr->contents = (unsigned char *)
654 bfd_alloc2 (abfd, shdr->sh_size, sizeof (*dest) / 4);
655 /* PR binutils/4110: Handle corrupt group headers. */
656 if (shdr->contents == NULL)
659 /* xgettext:c-format */
660 (_("%B: corrupt size field in group section"
661 " header: %#Lx"), abfd, shdr->sh_size);
662 bfd_set_error (bfd_error_bad_value);
667 memset (shdr->contents, 0, amt);
669 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
670 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
674 /* xgettext:c-format */
675 (_("%B: invalid size field in group section"
676 " header: %#Lx"), abfd, shdr->sh_size);
677 bfd_set_error (bfd_error_bad_value);
679 /* PR 17510: If the group contents are even
680 partially corrupt, do not allow any of the
681 contents to be used. */
682 memset (shdr->contents, 0, amt);
686 /* Translate raw contents, a flag word followed by an
687 array of elf section indices all in target byte order,
688 to the flag word followed by an array of elf section
690 src = shdr->contents + shdr->sh_size;
691 dest = (Elf_Internal_Group *) (shdr->contents + amt);
699 idx = H_GET_32 (abfd, src);
700 if (src == shdr->contents)
703 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
704 shdr->bfd_section->flags
705 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
711 (_("%B: invalid SHT_GROUP entry"), abfd);
714 dest->shdr = elf_elfsections (abfd)[idx];
719 /* PR 17510: Corrupt binaries might contain invalid groups. */
720 if (num_group != (unsigned) elf_tdata (abfd)->num_group)
722 elf_tdata (abfd)->num_group = num_group;
724 /* If all groups are invalid then fail. */
727 elf_tdata (abfd)->group_sect_ptr = NULL;
728 elf_tdata (abfd)->num_group = num_group = -1;
730 (_("%B: no valid group sections found"), abfd);
731 bfd_set_error (bfd_error_bad_value);
737 if (num_group != (unsigned) -1)
741 for (i = 0; i < num_group; i++)
743 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
744 Elf_Internal_Group *idx;
750 idx = (Elf_Internal_Group *) shdr->contents;
751 if (idx == NULL || shdr->sh_size < 4)
753 /* See PR 21957 for a reproducer. */
754 /* xgettext:c-format */
755 _bfd_error_handler (_("%B: group section '%A' has no contents"),
756 abfd, shdr->bfd_section);
757 elf_tdata (abfd)->group_sect_ptr[i] = NULL;
758 bfd_set_error (bfd_error_bad_value);
761 n_elt = shdr->sh_size / 4;
763 /* Look through this group's sections to see if current
764 section is a member. */
766 if ((++idx)->shdr == hdr)
770 /* We are a member of this group. Go looking through
771 other members to see if any others are linked via
773 idx = (Elf_Internal_Group *) shdr->contents;
774 n_elt = shdr->sh_size / 4;
776 if ((s = (++idx)->shdr->bfd_section) != NULL
777 && elf_next_in_group (s) != NULL)
781 /* Snarf the group name from other member, and
782 insert current section in circular list. */
783 elf_group_name (newsect) = elf_group_name (s);
784 elf_next_in_group (newsect) = elf_next_in_group (s);
785 elf_next_in_group (s) = newsect;
791 gname = group_signature (abfd, shdr);
794 elf_group_name (newsect) = gname;
796 /* Start a circular list with one element. */
797 elf_next_in_group (newsect) = newsect;
800 /* If the group section has been created, point to the
802 if (shdr->bfd_section != NULL)
803 elf_next_in_group (shdr->bfd_section) = newsect;
811 if (elf_group_name (newsect) == NULL)
813 /* xgettext:c-format */
814 _bfd_error_handler (_("%B: no group info for section '%A'"),
822 _bfd_elf_setup_sections (bfd *abfd)
825 unsigned int num_group = elf_tdata (abfd)->num_group;
826 bfd_boolean result = TRUE;
829 /* Process SHF_LINK_ORDER. */
830 for (s = abfd->sections; s != NULL; s = s->next)
832 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
833 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
835 unsigned int elfsec = this_hdr->sh_link;
836 /* FIXME: The old Intel compiler and old strip/objcopy may
837 not set the sh_link or sh_info fields. Hence we could
838 get the situation where elfsec is 0. */
841 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
842 if (bed->link_order_error_handler)
843 bed->link_order_error_handler
844 /* xgettext:c-format */
845 (_("%B: warning: sh_link not set for section `%A'"),
850 asection *linksec = NULL;
852 if (elfsec < elf_numsections (abfd))
854 this_hdr = elf_elfsections (abfd)[elfsec];
855 linksec = this_hdr->bfd_section;
859 Some strip/objcopy may leave an incorrect value in
860 sh_link. We don't want to proceed. */
864 /* xgettext:c-format */
865 (_("%B: sh_link [%d] in section `%A' is incorrect"),
866 s->owner, elfsec, s);
870 elf_linked_to_section (s) = linksec;
873 else if (this_hdr->sh_type == SHT_GROUP
874 && elf_next_in_group (s) == NULL)
877 /* xgettext:c-format */
878 (_("%B: SHT_GROUP section [index %d] has no SHF_GROUP sections"),
879 abfd, elf_section_data (s)->this_idx);
884 /* Process section groups. */
885 if (num_group == (unsigned) -1)
888 for (i = 0; i < num_group; i++)
890 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
891 Elf_Internal_Group *idx;
894 /* PR binutils/18758: Beware of corrupt binaries with invalid group data. */
895 if (shdr == NULL || shdr->bfd_section == NULL || shdr->contents == NULL)
898 /* xgettext:c-format */
899 (_("%B: section group entry number %u is corrupt"),
905 idx = (Elf_Internal_Group *) shdr->contents;
906 n_elt = shdr->sh_size / 4;
912 if (idx->shdr == NULL)
914 else if (idx->shdr->bfd_section)
915 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
916 else if (idx->shdr->sh_type != SHT_RELA
917 && idx->shdr->sh_type != SHT_REL)
919 /* There are some unknown sections in the group. */
921 /* xgettext:c-format */
922 (_("%B: unknown type [%#x] section `%s' in group [%A]"),
925 bfd_elf_string_from_elf_section (abfd,
926 (elf_elfheader (abfd)
939 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
941 return elf_next_in_group (sec) != NULL;
945 convert_debug_to_zdebug (bfd *abfd, const char *name)
947 unsigned int len = strlen (name);
948 char *new_name = bfd_alloc (abfd, len + 2);
949 if (new_name == NULL)
953 memcpy (new_name + 2, name + 1, len);
958 convert_zdebug_to_debug (bfd *abfd, const char *name)
960 unsigned int len = strlen (name);
961 char *new_name = bfd_alloc (abfd, len);
962 if (new_name == NULL)
965 memcpy (new_name + 1, name + 2, len - 1);
969 /* Make a BFD section from an ELF section. We store a pointer to the
970 BFD section in the bfd_section field of the header. */
973 _bfd_elf_make_section_from_shdr (bfd *abfd,
974 Elf_Internal_Shdr *hdr,
980 const struct elf_backend_data *bed;
982 if (hdr->bfd_section != NULL)
985 newsect = bfd_make_section_anyway (abfd, name);
989 hdr->bfd_section = newsect;
990 elf_section_data (newsect)->this_hdr = *hdr;
991 elf_section_data (newsect)->this_idx = shindex;
993 /* Always use the real type/flags. */
994 elf_section_type (newsect) = hdr->sh_type;
995 elf_section_flags (newsect) = hdr->sh_flags;
997 newsect->filepos = hdr->sh_offset;
999 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
1000 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
1001 || ! bfd_set_section_alignment (abfd, newsect,
1002 bfd_log2 (hdr->sh_addralign)))
1005 flags = SEC_NO_FLAGS;
1006 if (hdr->sh_type != SHT_NOBITS)
1007 flags |= SEC_HAS_CONTENTS;
1008 if (hdr->sh_type == SHT_GROUP)
1010 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1013 if (hdr->sh_type != SHT_NOBITS)
1016 if ((hdr->sh_flags & SHF_WRITE) == 0)
1017 flags |= SEC_READONLY;
1018 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
1020 else if ((flags & SEC_LOAD) != 0)
1022 if ((hdr->sh_flags & SHF_MERGE) != 0)
1025 newsect->entsize = hdr->sh_entsize;
1027 if ((hdr->sh_flags & SHF_STRINGS) != 0)
1028 flags |= SEC_STRINGS;
1029 if (hdr->sh_flags & SHF_GROUP)
1030 if (!setup_group (abfd, hdr, newsect))
1032 if ((hdr->sh_flags & SHF_TLS) != 0)
1033 flags |= SEC_THREAD_LOCAL;
1034 if ((hdr->sh_flags & SHF_EXCLUDE) != 0)
1035 flags |= SEC_EXCLUDE;
1037 if ((flags & SEC_ALLOC) == 0)
1039 /* The debugging sections appear to be recognized only by name,
1040 not any sort of flag. Their SEC_ALLOC bits are cleared. */
1041 if (name [0] == '.')
1046 p = ".debug", n = 6;
1047 else if (name[1] == 'g' && name[2] == 'n')
1048 p = ".gnu.linkonce.wi.", n = 17;
1049 else if (name[1] == 'g' && name[2] == 'd')
1050 p = ".gdb_index", n = 11; /* yes we really do mean 11. */
1051 else if (name[1] == 'l')
1053 else if (name[1] == 's')
1055 else if (name[1] == 'z')
1056 p = ".zdebug", n = 7;
1059 if (p != NULL && strncmp (name, p, n) == 0)
1060 flags |= SEC_DEBUGGING;
1064 /* As a GNU extension, if the name begins with .gnu.linkonce, we
1065 only link a single copy of the section. This is used to support
1066 g++. g++ will emit each template expansion in its own section.
1067 The symbols will be defined as weak, so that multiple definitions
1068 are permitted. The GNU linker extension is to actually discard
1069 all but one of the sections. */
1070 if (CONST_STRNEQ (name, ".gnu.linkonce")
1071 && elf_next_in_group (newsect) == NULL)
1072 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1074 bed = get_elf_backend_data (abfd);
1075 if (bed->elf_backend_section_flags)
1076 if (! bed->elf_backend_section_flags (&flags, hdr))
1079 if (! bfd_set_section_flags (abfd, newsect, flags))
1082 /* We do not parse the PT_NOTE segments as we are interested even in the
1083 separate debug info files which may have the segments offsets corrupted.
1084 PT_NOTEs from the core files are currently not parsed using BFD. */
1085 if (hdr->sh_type == SHT_NOTE)
1089 if (!bfd_malloc_and_get_section (abfd, newsect, &contents))
1092 elf_parse_notes (abfd, (char *) contents, hdr->sh_size, hdr->sh_offset);
1096 if ((flags & SEC_ALLOC) != 0)
1098 Elf_Internal_Phdr *phdr;
1099 unsigned int i, nload;
1101 /* Some ELF linkers produce binaries with all the program header
1102 p_paddr fields zero. If we have such a binary with more than
1103 one PT_LOAD header, then leave the section lma equal to vma
1104 so that we don't create sections with overlapping lma. */
1105 phdr = elf_tdata (abfd)->phdr;
1106 for (nload = 0, i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
1107 if (phdr->p_paddr != 0)
1109 else if (phdr->p_type == PT_LOAD && phdr->p_memsz != 0)
1111 if (i >= elf_elfheader (abfd)->e_phnum && nload > 1)
1114 phdr = elf_tdata (abfd)->phdr;
1115 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
1117 if (((phdr->p_type == PT_LOAD
1118 && (hdr->sh_flags & SHF_TLS) == 0)
1119 || phdr->p_type == PT_TLS)
1120 && ELF_SECTION_IN_SEGMENT (hdr, phdr))
1122 if ((flags & SEC_LOAD) == 0)
1123 newsect->lma = (phdr->p_paddr
1124 + hdr->sh_addr - phdr->p_vaddr);
1126 /* We used to use the same adjustment for SEC_LOAD
1127 sections, but that doesn't work if the segment
1128 is packed with code from multiple VMAs.
1129 Instead we calculate the section LMA based on
1130 the segment LMA. It is assumed that the
1131 segment will contain sections with contiguous
1132 LMAs, even if the VMAs are not. */
1133 newsect->lma = (phdr->p_paddr
1134 + hdr->sh_offset - phdr->p_offset);
1136 /* With contiguous segments, we can't tell from file
1137 offsets whether a section with zero size should
1138 be placed at the end of one segment or the
1139 beginning of the next. Decide based on vaddr. */
1140 if (hdr->sh_addr >= phdr->p_vaddr
1141 && (hdr->sh_addr + hdr->sh_size
1142 <= phdr->p_vaddr + phdr->p_memsz))
1148 /* Compress/decompress DWARF debug sections with names: .debug_* and
1149 .zdebug_*, after the section flags is set. */
1150 if ((flags & SEC_DEBUGGING)
1151 && ((name[1] == 'd' && name[6] == '_')
1152 || (name[1] == 'z' && name[7] == '_')))
1154 enum { nothing, compress, decompress } action = nothing;
1155 int compression_header_size;
1156 bfd_size_type uncompressed_size;
1157 bfd_boolean compressed
1158 = bfd_is_section_compressed_with_header (abfd, newsect,
1159 &compression_header_size,
1160 &uncompressed_size);
1164 /* Compressed section. Check if we should decompress. */
1165 if ((abfd->flags & BFD_DECOMPRESS))
1166 action = decompress;
1169 /* Compress the uncompressed section or convert from/to .zdebug*
1170 section. Check if we should compress. */
1171 if (action == nothing)
1173 if (newsect->size != 0
1174 && (abfd->flags & BFD_COMPRESS)
1175 && compression_header_size >= 0
1176 && uncompressed_size > 0
1178 || ((compression_header_size > 0)
1179 != ((abfd->flags & BFD_COMPRESS_GABI) != 0))))
1185 if (action == compress)
1187 if (!bfd_init_section_compress_status (abfd, newsect))
1190 /* xgettext:c-format */
1191 (_("%B: unable to initialize compress status for section %s"),
1198 if (!bfd_init_section_decompress_status (abfd, newsect))
1201 /* xgettext:c-format */
1202 (_("%B: unable to initialize decompress status for section %s"),
1208 if (abfd->is_linker_input)
1211 && (action == decompress
1212 || (action == compress
1213 && (abfd->flags & BFD_COMPRESS_GABI) != 0)))
1215 /* Convert section name from .zdebug_* to .debug_* so
1216 that linker will consider this section as a debug
1218 char *new_name = convert_zdebug_to_debug (abfd, name);
1219 if (new_name == NULL)
1221 bfd_rename_section (abfd, newsect, new_name);
1225 /* For objdump, don't rename the section. For objcopy, delay
1226 section rename to elf_fake_sections. */
1227 newsect->flags |= SEC_ELF_RENAME;
1233 const char *const bfd_elf_section_type_names[] =
1235 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1236 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1237 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1240 /* ELF relocs are against symbols. If we are producing relocatable
1241 output, and the reloc is against an external symbol, and nothing
1242 has given us any additional addend, the resulting reloc will also
1243 be against the same symbol. In such a case, we don't want to
1244 change anything about the way the reloc is handled, since it will
1245 all be done at final link time. Rather than put special case code
1246 into bfd_perform_relocation, all the reloc types use this howto
1247 function. It just short circuits the reloc if producing
1248 relocatable output against an external symbol. */
1250 bfd_reloc_status_type
1251 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1252 arelent *reloc_entry,
1254 void *data ATTRIBUTE_UNUSED,
1255 asection *input_section,
1257 char **error_message ATTRIBUTE_UNUSED)
1259 if (output_bfd != NULL
1260 && (symbol->flags & BSF_SECTION_SYM) == 0
1261 && (! reloc_entry->howto->partial_inplace
1262 || reloc_entry->addend == 0))
1264 reloc_entry->address += input_section->output_offset;
1265 return bfd_reloc_ok;
1268 return bfd_reloc_continue;
1271 /* Returns TRUE if section A matches section B.
1272 Names, addresses and links may be different, but everything else
1273 should be the same. */
1276 section_match (const Elf_Internal_Shdr * a,
1277 const Elf_Internal_Shdr * b)
1280 a->sh_type == b->sh_type
1281 && (a->sh_flags & ~ SHF_INFO_LINK)
1282 == (b->sh_flags & ~ SHF_INFO_LINK)
1283 && a->sh_addralign == b->sh_addralign
1284 && a->sh_size == b->sh_size
1285 && a->sh_entsize == b->sh_entsize
1286 /* FIXME: Check sh_addr ? */
1290 /* Find a section in OBFD that has the same characteristics
1291 as IHEADER. Return the index of this section or SHN_UNDEF if
1292 none can be found. Check's section HINT first, as this is likely
1293 to be the correct section. */
1296 find_link (const bfd *obfd, const Elf_Internal_Shdr *iheader,
1297 const unsigned int hint)
1299 Elf_Internal_Shdr ** oheaders = elf_elfsections (obfd);
1302 BFD_ASSERT (iheader != NULL);
1304 /* See PR 20922 for a reproducer of the NULL test. */
1305 if (hint < elf_numsections (obfd)
1306 && oheaders[hint] != NULL
1307 && section_match (oheaders[hint], iheader))
1310 for (i = 1; i < elf_numsections (obfd); i++)
1312 Elf_Internal_Shdr * oheader = oheaders[i];
1314 if (oheader == NULL)
1316 if (section_match (oheader, iheader))
1317 /* FIXME: Do we care if there is a potential for
1318 multiple matches ? */
1325 /* PR 19938: Attempt to set the ELF section header fields of an OS or
1326 Processor specific section, based upon a matching input section.
1327 Returns TRUE upon success, FALSE otherwise. */
1330 copy_special_section_fields (const bfd *ibfd,
1332 const Elf_Internal_Shdr *iheader,
1333 Elf_Internal_Shdr *oheader,
1334 const unsigned int secnum)
1336 const struct elf_backend_data *bed = get_elf_backend_data (obfd);
1337 const Elf_Internal_Shdr **iheaders = (const Elf_Internal_Shdr **) elf_elfsections (ibfd);
1338 bfd_boolean changed = FALSE;
1339 unsigned int sh_link;
1341 if (oheader->sh_type == SHT_NOBITS)
1343 /* This is a feature for objcopy --only-keep-debug:
1344 When a section's type is changed to NOBITS, we preserve
1345 the sh_link and sh_info fields so that they can be
1346 matched up with the original.
1348 Note: Strictly speaking these assignments are wrong.
1349 The sh_link and sh_info fields should point to the
1350 relevent sections in the output BFD, which may not be in
1351 the same location as they were in the input BFD. But
1352 the whole point of this action is to preserve the
1353 original values of the sh_link and sh_info fields, so
1354 that they can be matched up with the section headers in
1355 the original file. So strictly speaking we may be
1356 creating an invalid ELF file, but it is only for a file
1357 that just contains debug info and only for sections
1358 without any contents. */
1359 if (oheader->sh_link == 0)
1360 oheader->sh_link = iheader->sh_link;
1361 if (oheader->sh_info == 0)
1362 oheader->sh_info = iheader->sh_info;
1366 /* Allow the target a chance to decide how these fields should be set. */
1367 if (bed->elf_backend_copy_special_section_fields != NULL
1368 && bed->elf_backend_copy_special_section_fields
1369 (ibfd, obfd, iheader, oheader))
1372 /* We have an iheader which might match oheader, and which has non-zero
1373 sh_info and/or sh_link fields. Attempt to follow those links and find
1374 the section in the output bfd which corresponds to the linked section
1375 in the input bfd. */
1376 if (iheader->sh_link != SHN_UNDEF)
1378 /* See PR 20931 for a reproducer. */
1379 if (iheader->sh_link >= elf_numsections (ibfd))
1382 /* xgettext:c-format */
1383 (_("%B: Invalid sh_link field (%d) in section number %d"),
1384 ibfd, iheader->sh_link, secnum);
1388 sh_link = find_link (obfd, iheaders[iheader->sh_link], iheader->sh_link);
1389 if (sh_link != SHN_UNDEF)
1391 oheader->sh_link = sh_link;
1395 /* FIXME: Should we install iheader->sh_link
1396 if we could not find a match ? */
1398 /* xgettext:c-format */
1399 (_("%B: Failed to find link section for section %d"), obfd, secnum);
1402 if (iheader->sh_info)
1404 /* The sh_info field can hold arbitrary information, but if the
1405 SHF_LINK_INFO flag is set then it should be interpreted as a
1407 if (iheader->sh_flags & SHF_INFO_LINK)
1409 sh_link = find_link (obfd, iheaders[iheader->sh_info],
1411 if (sh_link != SHN_UNDEF)
1412 oheader->sh_flags |= SHF_INFO_LINK;
1415 /* No idea what it means - just copy it. */
1416 sh_link = iheader->sh_info;
1418 if (sh_link != SHN_UNDEF)
1420 oheader->sh_info = sh_link;
1425 /* xgettext:c-format */
1426 (_("%B: Failed to find info section for section %d"), obfd, secnum);
1432 /* Copy the program header and other data from one object module to
1436 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1438 const Elf_Internal_Shdr **iheaders = (const Elf_Internal_Shdr **) elf_elfsections (ibfd);
1439 Elf_Internal_Shdr **oheaders = elf_elfsections (obfd);
1440 const struct elf_backend_data *bed;
1443 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1444 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1447 if (!elf_flags_init (obfd))
1449 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1450 elf_flags_init (obfd) = TRUE;
1453 elf_gp (obfd) = elf_gp (ibfd);
1455 /* Also copy the EI_OSABI field. */
1456 elf_elfheader (obfd)->e_ident[EI_OSABI] =
1457 elf_elfheader (ibfd)->e_ident[EI_OSABI];
1459 /* If set, copy the EI_ABIVERSION field. */
1460 if (elf_elfheader (ibfd)->e_ident[EI_ABIVERSION])
1461 elf_elfheader (obfd)->e_ident[EI_ABIVERSION]
1462 = elf_elfheader (ibfd)->e_ident[EI_ABIVERSION];
1464 /* Copy object attributes. */
1465 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1467 if (iheaders == NULL || oheaders == NULL)
1470 bed = get_elf_backend_data (obfd);
1472 /* Possibly copy other fields in the section header. */
1473 for (i = 1; i < elf_numsections (obfd); i++)
1476 Elf_Internal_Shdr * oheader = oheaders[i];
1478 /* Ignore ordinary sections. SHT_NOBITS sections are considered however
1479 because of a special case need for generating separate debug info
1480 files. See below for more details. */
1482 || (oheader->sh_type != SHT_NOBITS
1483 && oheader->sh_type < SHT_LOOS))
1486 /* Ignore empty sections, and sections whose
1487 fields have already been initialised. */
1488 if (oheader->sh_size == 0
1489 || (oheader->sh_info != 0 && oheader->sh_link != 0))
1492 /* Scan for the matching section in the input bfd.
1493 First we try for a direct mapping between the input and output sections. */
1494 for (j = 1; j < elf_numsections (ibfd); j++)
1496 const Elf_Internal_Shdr * iheader = iheaders[j];
1498 if (iheader == NULL)
1501 if (oheader->bfd_section != NULL
1502 && iheader->bfd_section != NULL
1503 && iheader->bfd_section->output_section != NULL
1504 && iheader->bfd_section->output_section == oheader->bfd_section)
1506 /* We have found a connection from the input section to the
1507 output section. Attempt to copy the header fields. If
1508 this fails then do not try any further sections - there
1509 should only be a one-to-one mapping between input and output. */
1510 if (! copy_special_section_fields (ibfd, obfd, iheader, oheader, i))
1511 j = elf_numsections (ibfd);
1516 if (j < elf_numsections (ibfd))
1519 /* That failed. So try to deduce the corresponding input section.
1520 Unfortunately we cannot compare names as the output string table
1521 is empty, so instead we check size, address and type. */
1522 for (j = 1; j < elf_numsections (ibfd); j++)
1524 const Elf_Internal_Shdr * iheader = iheaders[j];
1526 if (iheader == NULL)
1529 /* Try matching fields in the input section's header.
1530 Since --only-keep-debug turns all non-debug sections into
1531 SHT_NOBITS sections, the output SHT_NOBITS type matches any
1533 if ((oheader->sh_type == SHT_NOBITS
1534 || iheader->sh_type == oheader->sh_type)
1535 && (iheader->sh_flags & ~ SHF_INFO_LINK)
1536 == (oheader->sh_flags & ~ SHF_INFO_LINK)
1537 && iheader->sh_addralign == oheader->sh_addralign
1538 && iheader->sh_entsize == oheader->sh_entsize
1539 && iheader->sh_size == oheader->sh_size
1540 && iheader->sh_addr == oheader->sh_addr
1541 && (iheader->sh_info != oheader->sh_info
1542 || iheader->sh_link != oheader->sh_link))
1544 if (copy_special_section_fields (ibfd, obfd, iheader, oheader, i))
1549 if (j == elf_numsections (ibfd) && oheader->sh_type >= SHT_LOOS)
1551 /* Final attempt. Call the backend copy function
1552 with a NULL input section. */
1553 if (bed->elf_backend_copy_special_section_fields != NULL)
1554 bed->elf_backend_copy_special_section_fields (ibfd, obfd, NULL, oheader);
1562 get_segment_type (unsigned int p_type)
1567 case PT_NULL: pt = "NULL"; break;
1568 case PT_LOAD: pt = "LOAD"; break;
1569 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1570 case PT_INTERP: pt = "INTERP"; break;
1571 case PT_NOTE: pt = "NOTE"; break;
1572 case PT_SHLIB: pt = "SHLIB"; break;
1573 case PT_PHDR: pt = "PHDR"; break;
1574 case PT_TLS: pt = "TLS"; break;
1575 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1576 case PT_GNU_STACK: pt = "STACK"; break;
1577 case PT_GNU_RELRO: pt = "RELRO"; break;
1578 default: pt = NULL; break;
1583 /* Print out the program headers. */
1586 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1588 FILE *f = (FILE *) farg;
1589 Elf_Internal_Phdr *p;
1591 bfd_byte *dynbuf = NULL;
1593 p = elf_tdata (abfd)->phdr;
1598 fprintf (f, _("\nProgram Header:\n"));
1599 c = elf_elfheader (abfd)->e_phnum;
1600 for (i = 0; i < c; i++, p++)
1602 const char *pt = get_segment_type (p->p_type);
1607 sprintf (buf, "0x%lx", p->p_type);
1610 fprintf (f, "%8s off 0x", pt);
1611 bfd_fprintf_vma (abfd, f, p->p_offset);
1612 fprintf (f, " vaddr 0x");
1613 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1614 fprintf (f, " paddr 0x");
1615 bfd_fprintf_vma (abfd, f, p->p_paddr);
1616 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1617 fprintf (f, " filesz 0x");
1618 bfd_fprintf_vma (abfd, f, p->p_filesz);
1619 fprintf (f, " memsz 0x");
1620 bfd_fprintf_vma (abfd, f, p->p_memsz);
1621 fprintf (f, " flags %c%c%c",
1622 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1623 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1624 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1625 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1626 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1631 s = bfd_get_section_by_name (abfd, ".dynamic");
1634 unsigned int elfsec;
1635 unsigned long shlink;
1636 bfd_byte *extdyn, *extdynend;
1638 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1640 fprintf (f, _("\nDynamic Section:\n"));
1642 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1645 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1646 if (elfsec == SHN_BAD)
1648 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1650 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1651 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1654 /* PR 17512: file: 6f427532. */
1655 if (s->size < extdynsize)
1657 extdynend = extdyn + s->size;
1658 /* PR 17512: file: id:000006,sig:06,src:000000,op:flip4,pos:5664.
1660 for (; extdyn <= (extdynend - extdynsize); extdyn += extdynsize)
1662 Elf_Internal_Dyn dyn;
1663 const char *name = "";
1665 bfd_boolean stringp;
1666 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1668 (*swap_dyn_in) (abfd, extdyn, &dyn);
1670 if (dyn.d_tag == DT_NULL)
1677 if (bed->elf_backend_get_target_dtag)
1678 name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag);
1680 if (!strcmp (name, ""))
1682 sprintf (ab, "%#" BFD_VMA_FMT "x", dyn.d_tag);
1687 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1688 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1689 case DT_PLTGOT: name = "PLTGOT"; break;
1690 case DT_HASH: name = "HASH"; break;
1691 case DT_STRTAB: name = "STRTAB"; break;
1692 case DT_SYMTAB: name = "SYMTAB"; break;
1693 case DT_RELA: name = "RELA"; break;
1694 case DT_RELASZ: name = "RELASZ"; break;
1695 case DT_RELAENT: name = "RELAENT"; break;
1696 case DT_STRSZ: name = "STRSZ"; break;
1697 case DT_SYMENT: name = "SYMENT"; break;
1698 case DT_INIT: name = "INIT"; break;
1699 case DT_FINI: name = "FINI"; break;
1700 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1701 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1702 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1703 case DT_REL: name = "REL"; break;
1704 case DT_RELSZ: name = "RELSZ"; break;
1705 case DT_RELENT: name = "RELENT"; break;
1706 case DT_PLTREL: name = "PLTREL"; break;
1707 case DT_DEBUG: name = "DEBUG"; break;
1708 case DT_TEXTREL: name = "TEXTREL"; break;
1709 case DT_JMPREL: name = "JMPREL"; break;
1710 case DT_BIND_NOW: name = "BIND_NOW"; break;
1711 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1712 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1713 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1714 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1715 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1716 case DT_FLAGS: name = "FLAGS"; break;
1717 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1718 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1719 case DT_CHECKSUM: name = "CHECKSUM"; break;
1720 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1721 case DT_MOVEENT: name = "MOVEENT"; break;
1722 case DT_MOVESZ: name = "MOVESZ"; break;
1723 case DT_FEATURE: name = "FEATURE"; break;
1724 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1725 case DT_SYMINSZ: name = "SYMINSZ"; break;
1726 case DT_SYMINENT: name = "SYMINENT"; break;
1727 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1728 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1729 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1730 case DT_PLTPAD: name = "PLTPAD"; break;
1731 case DT_MOVETAB: name = "MOVETAB"; break;
1732 case DT_SYMINFO: name = "SYMINFO"; break;
1733 case DT_RELACOUNT: name = "RELACOUNT"; break;
1734 case DT_RELCOUNT: name = "RELCOUNT"; break;
1735 case DT_FLAGS_1: name = "FLAGS_1"; break;
1736 case DT_VERSYM: name = "VERSYM"; break;
1737 case DT_VERDEF: name = "VERDEF"; break;
1738 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1739 case DT_VERNEED: name = "VERNEED"; break;
1740 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1741 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1742 case DT_USED: name = "USED"; break;
1743 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1744 case DT_GNU_HASH: name = "GNU_HASH"; break;
1747 fprintf (f, " %-20s ", name);
1751 bfd_fprintf_vma (abfd, f, dyn.d_un.d_val);
1756 unsigned int tagv = dyn.d_un.d_val;
1758 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1761 fprintf (f, "%s", string);
1770 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1771 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1773 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1777 if (elf_dynverdef (abfd) != 0)
1779 Elf_Internal_Verdef *t;
1781 fprintf (f, _("\nVersion definitions:\n"));
1782 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1784 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1785 t->vd_flags, t->vd_hash,
1786 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1787 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1789 Elf_Internal_Verdaux *a;
1792 for (a = t->vd_auxptr->vda_nextptr;
1796 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1802 if (elf_dynverref (abfd) != 0)
1804 Elf_Internal_Verneed *t;
1806 fprintf (f, _("\nVersion References:\n"));
1807 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1809 Elf_Internal_Vernaux *a;
1811 fprintf (f, _(" required from %s:\n"),
1812 t->vn_filename ? t->vn_filename : "<corrupt>");
1813 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1814 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1815 a->vna_flags, a->vna_other,
1816 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1828 /* Get version string. */
1831 _bfd_elf_get_symbol_version_string (bfd *abfd, asymbol *symbol,
1832 bfd_boolean *hidden)
1834 const char *version_string = NULL;
1835 if (elf_dynversym (abfd) != 0
1836 && (elf_dynverdef (abfd) != 0 || elf_dynverref (abfd) != 0))
1838 unsigned int vernum = ((elf_symbol_type *) symbol)->version;
1840 *hidden = (vernum & VERSYM_HIDDEN) != 0;
1841 vernum &= VERSYM_VERSION;
1844 version_string = "";
1845 else if (vernum == 1)
1846 version_string = "Base";
1847 else if (vernum <= elf_tdata (abfd)->cverdefs)
1849 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1852 Elf_Internal_Verneed *t;
1854 version_string = "";
1855 for (t = elf_tdata (abfd)->verref;
1859 Elf_Internal_Vernaux *a;
1861 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1863 if (a->vna_other == vernum)
1865 version_string = a->vna_nodename;
1872 return version_string;
1875 /* Display ELF-specific fields of a symbol. */
1878 bfd_elf_print_symbol (bfd *abfd,
1881 bfd_print_symbol_type how)
1883 FILE *file = (FILE *) filep;
1886 case bfd_print_symbol_name:
1887 fprintf (file, "%s", symbol->name);
1889 case bfd_print_symbol_more:
1890 fprintf (file, "elf ");
1891 bfd_fprintf_vma (abfd, file, symbol->value);
1892 fprintf (file, " %x", symbol->flags);
1894 case bfd_print_symbol_all:
1896 const char *section_name;
1897 const char *name = NULL;
1898 const struct elf_backend_data *bed;
1899 unsigned char st_other;
1901 const char *version_string;
1904 section_name = symbol->section ? symbol->section->name : "(*none*)";
1906 bed = get_elf_backend_data (abfd);
1907 if (bed->elf_backend_print_symbol_all)
1908 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1912 name = symbol->name;
1913 bfd_print_symbol_vandf (abfd, file, symbol);
1916 fprintf (file, " %s\t", section_name);
1917 /* Print the "other" value for a symbol. For common symbols,
1918 we've already printed the size; now print the alignment.
1919 For other symbols, we have no specified alignment, and
1920 we've printed the address; now print the size. */
1921 if (symbol->section && bfd_is_com_section (symbol->section))
1922 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1924 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1925 bfd_fprintf_vma (abfd, file, val);
1927 /* If we have version information, print it. */
1928 version_string = _bfd_elf_get_symbol_version_string (abfd,
1934 fprintf (file, " %-11s", version_string);
1939 fprintf (file, " (%s)", version_string);
1940 for (i = 10 - strlen (version_string); i > 0; --i)
1945 /* If the st_other field is not zero, print it. */
1946 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1951 case STV_INTERNAL: fprintf (file, " .internal"); break;
1952 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1953 case STV_PROTECTED: fprintf (file, " .protected"); break;
1955 /* Some other non-defined flags are also present, so print
1957 fprintf (file, " 0x%02x", (unsigned int) st_other);
1960 fprintf (file, " %s", name);
1966 /* ELF .o/exec file reading */
1968 /* Create a new bfd section from an ELF section header. */
1971 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1973 Elf_Internal_Shdr *hdr;
1974 Elf_Internal_Ehdr *ehdr;
1975 const struct elf_backend_data *bed;
1977 bfd_boolean ret = TRUE;
1978 static bfd_boolean * sections_being_created = NULL;
1979 static bfd * sections_being_created_abfd = NULL;
1980 static unsigned int nesting = 0;
1982 if (shindex >= elf_numsections (abfd))
1987 /* PR17512: A corrupt ELF binary might contain a recursive group of
1988 sections, with each the string indicies pointing to the next in the
1989 loop. Detect this here, by refusing to load a section that we are
1990 already in the process of loading. We only trigger this test if
1991 we have nested at least three sections deep as normal ELF binaries
1992 can expect to recurse at least once.
1994 FIXME: It would be better if this array was attached to the bfd,
1995 rather than being held in a static pointer. */
1997 if (sections_being_created_abfd != abfd)
1998 sections_being_created = NULL;
1999 if (sections_being_created == NULL)
2001 /* FIXME: It would be more efficient to attach this array to the bfd somehow. */
2002 sections_being_created = (bfd_boolean *)
2003 bfd_zalloc (abfd, elf_numsections (abfd) * sizeof (bfd_boolean));
2004 sections_being_created_abfd = abfd;
2006 if (sections_being_created [shindex])
2009 (_("%B: warning: loop in section dependencies detected"), abfd);
2012 sections_being_created [shindex] = TRUE;
2015 hdr = elf_elfsections (abfd)[shindex];
2016 ehdr = elf_elfheader (abfd);
2017 name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx,
2022 bed = get_elf_backend_data (abfd);
2023 switch (hdr->sh_type)
2026 /* Inactive section. Throw it away. */
2029 case SHT_PROGBITS: /* Normal section with contents. */
2030 case SHT_NOBITS: /* .bss section. */
2031 case SHT_HASH: /* .hash section. */
2032 case SHT_NOTE: /* .note section. */
2033 case SHT_INIT_ARRAY: /* .init_array section. */
2034 case SHT_FINI_ARRAY: /* .fini_array section. */
2035 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
2036 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
2037 case SHT_GNU_HASH: /* .gnu.hash section. */
2038 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2041 case SHT_DYNAMIC: /* Dynamic linking information. */
2042 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2045 if (hdr->sh_link > elf_numsections (abfd))
2047 /* PR 10478: Accept Solaris binaries with a sh_link
2048 field set to SHN_BEFORE or SHN_AFTER. */
2049 switch (bfd_get_arch (abfd))
2052 case bfd_arch_sparc:
2053 if (hdr->sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
2054 || hdr->sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
2056 /* Otherwise fall through. */
2061 else if (elf_elfsections (abfd)[hdr->sh_link] == NULL)
2063 else if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
2065 Elf_Internal_Shdr *dynsymhdr;
2067 /* The shared libraries distributed with hpux11 have a bogus
2068 sh_link field for the ".dynamic" section. Find the
2069 string table for the ".dynsym" section instead. */
2070 if (elf_dynsymtab (abfd) != 0)
2072 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
2073 hdr->sh_link = dynsymhdr->sh_link;
2077 unsigned int i, num_sec;
2079 num_sec = elf_numsections (abfd);
2080 for (i = 1; i < num_sec; i++)
2082 dynsymhdr = elf_elfsections (abfd)[i];
2083 if (dynsymhdr->sh_type == SHT_DYNSYM)
2085 hdr->sh_link = dynsymhdr->sh_link;
2093 case SHT_SYMTAB: /* A symbol table. */
2094 if (elf_onesymtab (abfd) == shindex)
2097 if (hdr->sh_entsize != bed->s->sizeof_sym)
2100 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
2102 if (hdr->sh_size != 0)
2104 /* Some assemblers erroneously set sh_info to one with a
2105 zero sh_size. ld sees this as a global symbol count
2106 of (unsigned) -1. Fix it here. */
2111 /* PR 18854: A binary might contain more than one symbol table.
2112 Unusual, but possible. Warn, but continue. */
2113 if (elf_onesymtab (abfd) != 0)
2116 /* xgettext:c-format */
2117 (_("%B: warning: multiple symbol tables detected"
2118 " - ignoring the table in section %u"),
2122 elf_onesymtab (abfd) = shindex;
2123 elf_symtab_hdr (abfd) = *hdr;
2124 elf_elfsections (abfd)[shindex] = hdr = & elf_symtab_hdr (abfd);
2125 abfd->flags |= HAS_SYMS;
2127 /* Sometimes a shared object will map in the symbol table. If
2128 SHF_ALLOC is set, and this is a shared object, then we also
2129 treat this section as a BFD section. We can not base the
2130 decision purely on SHF_ALLOC, because that flag is sometimes
2131 set in a relocatable object file, which would confuse the
2133 if ((hdr->sh_flags & SHF_ALLOC) != 0
2134 && (abfd->flags & DYNAMIC) != 0
2135 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2139 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
2140 can't read symbols without that section loaded as well. It
2141 is most likely specified by the next section header. */
2143 elf_section_list * entry;
2144 unsigned int i, num_sec;
2146 for (entry = elf_symtab_shndx_list (abfd); entry != NULL; entry = entry->next)
2147 if (entry->hdr.sh_link == shindex)
2150 num_sec = elf_numsections (abfd);
2151 for (i = shindex + 1; i < num_sec; i++)
2153 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2155 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
2156 && hdr2->sh_link == shindex)
2161 for (i = 1; i < shindex; i++)
2163 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2165 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
2166 && hdr2->sh_link == shindex)
2171 ret = bfd_section_from_shdr (abfd, i);
2172 /* else FIXME: we have failed to find the symbol table - should we issue an error ? */
2176 case SHT_DYNSYM: /* A dynamic symbol table. */
2177 if (elf_dynsymtab (abfd) == shindex)
2180 if (hdr->sh_entsize != bed->s->sizeof_sym)
2183 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
2185 if (hdr->sh_size != 0)
2188 /* Some linkers erroneously set sh_info to one with a
2189 zero sh_size. ld sees this as a global symbol count
2190 of (unsigned) -1. Fix it here. */
2195 /* PR 18854: A binary might contain more than one dynamic symbol table.
2196 Unusual, but possible. Warn, but continue. */
2197 if (elf_dynsymtab (abfd) != 0)
2200 /* xgettext:c-format */
2201 (_("%B: warning: multiple dynamic symbol tables detected"
2202 " - ignoring the table in section %u"),
2206 elf_dynsymtab (abfd) = shindex;
2207 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
2208 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
2209 abfd->flags |= HAS_SYMS;
2211 /* Besides being a symbol table, we also treat this as a regular
2212 section, so that objcopy can handle it. */
2213 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2216 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections. */
2218 elf_section_list * entry;
2220 for (entry = elf_symtab_shndx_list (abfd); entry != NULL; entry = entry->next)
2221 if (entry->ndx == shindex)
2224 entry = bfd_alloc (abfd, sizeof * entry);
2227 entry->ndx = shindex;
2229 entry->next = elf_symtab_shndx_list (abfd);
2230 elf_symtab_shndx_list (abfd) = entry;
2231 elf_elfsections (abfd)[shindex] = & entry->hdr;
2235 case SHT_STRTAB: /* A string table. */
2236 if (hdr->bfd_section != NULL)
2239 if (ehdr->e_shstrndx == shindex)
2241 elf_tdata (abfd)->shstrtab_hdr = *hdr;
2242 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
2246 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
2249 elf_tdata (abfd)->strtab_hdr = *hdr;
2250 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
2254 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
2257 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
2258 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
2259 elf_elfsections (abfd)[shindex] = hdr;
2260 /* We also treat this as a regular section, so that objcopy
2262 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2267 /* If the string table isn't one of the above, then treat it as a
2268 regular section. We need to scan all the headers to be sure,
2269 just in case this strtab section appeared before the above. */
2270 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
2272 unsigned int i, num_sec;
2274 num_sec = elf_numsections (abfd);
2275 for (i = 1; i < num_sec; i++)
2277 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2278 if (hdr2->sh_link == shindex)
2280 /* Prevent endless recursion on broken objects. */
2283 if (! bfd_section_from_shdr (abfd, i))
2285 if (elf_onesymtab (abfd) == i)
2287 if (elf_dynsymtab (abfd) == i)
2288 goto dynsymtab_strtab;
2292 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2297 /* *These* do a lot of work -- but build no sections! */
2299 asection *target_sect;
2300 Elf_Internal_Shdr *hdr2, **p_hdr;
2301 unsigned int num_sec = elf_numsections (abfd);
2302 struct bfd_elf_section_data *esdt;
2305 != (bfd_size_type) (hdr->sh_type == SHT_REL
2306 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
2309 /* Check for a bogus link to avoid crashing. */
2310 if (hdr->sh_link >= num_sec)
2313 /* xgettext:c-format */
2314 (_("%B: invalid link %u for reloc section %s (index %u)"),
2315 abfd, hdr->sh_link, name, shindex);
2316 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2321 /* For some incomprehensible reason Oracle distributes
2322 libraries for Solaris in which some of the objects have
2323 bogus sh_link fields. It would be nice if we could just
2324 reject them, but, unfortunately, some people need to use
2325 them. We scan through the section headers; if we find only
2326 one suitable symbol table, we clobber the sh_link to point
2327 to it. I hope this doesn't break anything.
2329 Don't do it on executable nor shared library. */
2330 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0
2331 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
2332 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
2338 for (scan = 1; scan < num_sec; scan++)
2340 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
2341 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
2352 hdr->sh_link = found;
2355 /* Get the symbol table. */
2356 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
2357 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
2358 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
2361 /* If this reloc section does not use the main symbol table we
2362 don't treat it as a reloc section. BFD can't adequately
2363 represent such a section, so at least for now, we don't
2364 try. We just present it as a normal section. We also
2365 can't use it as a reloc section if it points to the null
2366 section, an invalid section, another reloc section, or its
2367 sh_link points to the null section. */
2368 if (hdr->sh_link != elf_onesymtab (abfd)
2369 || hdr->sh_link == SHN_UNDEF
2370 || hdr->sh_info == SHN_UNDEF
2371 || hdr->sh_info >= num_sec
2372 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
2373 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
2375 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2380 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
2383 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
2384 if (target_sect == NULL)
2387 esdt = elf_section_data (target_sect);
2388 if (hdr->sh_type == SHT_RELA)
2389 p_hdr = &esdt->rela.hdr;
2391 p_hdr = &esdt->rel.hdr;
2393 /* PR 17512: file: 0b4f81b7. */
2396 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2));
2401 elf_elfsections (abfd)[shindex] = hdr2;
2402 target_sect->reloc_count += (NUM_SHDR_ENTRIES (hdr)
2403 * bed->s->int_rels_per_ext_rel);
2404 target_sect->flags |= SEC_RELOC;
2405 target_sect->relocation = NULL;
2406 target_sect->rel_filepos = hdr->sh_offset;
2407 /* In the section to which the relocations apply, mark whether
2408 its relocations are of the REL or RELA variety. */
2409 if (hdr->sh_size != 0)
2411 if (hdr->sh_type == SHT_RELA)
2412 target_sect->use_rela_p = 1;
2414 abfd->flags |= HAS_RELOC;
2418 case SHT_GNU_verdef:
2419 elf_dynverdef (abfd) = shindex;
2420 elf_tdata (abfd)->dynverdef_hdr = *hdr;
2421 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2424 case SHT_GNU_versym:
2425 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
2428 elf_dynversym (abfd) = shindex;
2429 elf_tdata (abfd)->dynversym_hdr = *hdr;
2430 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2433 case SHT_GNU_verneed:
2434 elf_dynverref (abfd) = shindex;
2435 elf_tdata (abfd)->dynverref_hdr = *hdr;
2436 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2443 if (! IS_VALID_GROUP_SECTION_HEADER (hdr, GRP_ENTRY_SIZE))
2446 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2452 /* Possibly an attributes section. */
2453 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
2454 || hdr->sh_type == bed->obj_attrs_section_type)
2456 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2458 _bfd_elf_parse_attributes (abfd, hdr);
2462 /* Check for any processor-specific section types. */
2463 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
2466 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
2468 if ((hdr->sh_flags & SHF_ALLOC) != 0)
2469 /* FIXME: How to properly handle allocated section reserved
2470 for applications? */
2472 /* xgettext:c-format */
2473 (_("%B: unknown type [%#x] section `%s'"),
2474 abfd, hdr->sh_type, name);
2477 /* Allow sections reserved for applications. */
2478 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2483 else if (hdr->sh_type >= SHT_LOPROC
2484 && hdr->sh_type <= SHT_HIPROC)
2485 /* FIXME: We should handle this section. */
2487 /* xgettext:c-format */
2488 (_("%B: unknown type [%#x] section `%s'"),
2489 abfd, hdr->sh_type, name);
2490 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
2492 /* Unrecognised OS-specific sections. */
2493 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
2494 /* SHF_OS_NONCONFORMING indicates that special knowledge is
2495 required to correctly process the section and the file should
2496 be rejected with an error message. */
2498 /* xgettext:c-format */
2499 (_("%B: unknown type [%#x] section `%s'"),
2500 abfd, hdr->sh_type, name);
2503 /* Otherwise it should be processed. */
2504 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2509 /* FIXME: We should handle this section. */
2511 /* xgettext:c-format */
2512 (_("%B: unknown type [%#x] section `%s'"),
2513 abfd, hdr->sh_type, name);
2521 if (sections_being_created && sections_being_created_abfd == abfd)
2522 sections_being_created [shindex] = FALSE;
2523 if (-- nesting == 0)
2525 sections_being_created = NULL;
2526 sections_being_created_abfd = abfd;
2531 /* Return the local symbol specified by ABFD, R_SYMNDX. */
2534 bfd_sym_from_r_symndx (struct sym_cache *cache,
2536 unsigned long r_symndx)
2538 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2540 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
2542 Elf_Internal_Shdr *symtab_hdr;
2543 unsigned char esym[sizeof (Elf64_External_Sym)];
2544 Elf_External_Sym_Shndx eshndx;
2546 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2547 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2548 &cache->sym[ent], esym, &eshndx) == NULL)
2551 if (cache->abfd != abfd)
2553 memset (cache->indx, -1, sizeof (cache->indx));
2556 cache->indx[ent] = r_symndx;
2559 return &cache->sym[ent];
2562 /* Given an ELF section number, retrieve the corresponding BFD
2566 bfd_section_from_elf_index (bfd *abfd, unsigned int sec_index)
2568 if (sec_index >= elf_numsections (abfd))
2570 return elf_elfsections (abfd)[sec_index]->bfd_section;
2573 static const struct bfd_elf_special_section special_sections_b[] =
2575 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2576 { NULL, 0, 0, 0, 0 }
2579 static const struct bfd_elf_special_section special_sections_c[] =
2581 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
2582 { NULL, 0, 0, 0, 0 }
2585 static const struct bfd_elf_special_section special_sections_d[] =
2587 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2588 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2589 /* There are more DWARF sections than these, but they needn't be added here
2590 unless you have to cope with broken compilers that don't emit section
2591 attributes or you want to help the user writing assembler. */
2592 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
2593 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
2594 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
2595 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
2596 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
2597 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
2598 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
2599 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
2600 { NULL, 0, 0, 0, 0 }
2603 static const struct bfd_elf_special_section special_sections_f[] =
2605 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2606 { STRING_COMMA_LEN (".fini_array"), -2, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2607 { NULL, 0 , 0, 0, 0 }
2610 static const struct bfd_elf_special_section special_sections_g[] =
2612 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2613 { STRING_COMMA_LEN (".gnu.lto_"), -1, SHT_PROGBITS, SHF_EXCLUDE },
2614 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2615 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2616 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2617 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2618 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2619 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2620 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2621 { NULL, 0, 0, 0, 0 }
2624 static const struct bfd_elf_special_section special_sections_h[] =
2626 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2627 { NULL, 0, 0, 0, 0 }
2630 static const struct bfd_elf_special_section special_sections_i[] =
2632 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2633 { STRING_COMMA_LEN (".init_array"), -2, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2634 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2635 { NULL, 0, 0, 0, 0 }
2638 static const struct bfd_elf_special_section special_sections_l[] =
2640 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2641 { NULL, 0, 0, 0, 0 }
2644 static const struct bfd_elf_special_section special_sections_n[] =
2646 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2647 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2648 { NULL, 0, 0, 0, 0 }
2651 static const struct bfd_elf_special_section special_sections_p[] =
2653 { STRING_COMMA_LEN (".preinit_array"), -2, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2654 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2655 { NULL, 0, 0, 0, 0 }
2658 static const struct bfd_elf_special_section special_sections_r[] =
2660 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2661 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2662 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2663 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2664 { NULL, 0, 0, 0, 0 }
2667 static const struct bfd_elf_special_section special_sections_s[] =
2669 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2670 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2671 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2672 /* See struct bfd_elf_special_section declaration for the semantics of
2673 this special case where .prefix_length != strlen (.prefix). */
2674 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2675 { NULL, 0, 0, 0, 0 }
2678 static const struct bfd_elf_special_section special_sections_t[] =
2680 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2681 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2682 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2683 { NULL, 0, 0, 0, 0 }
2686 static const struct bfd_elf_special_section special_sections_z[] =
2688 { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 },
2689 { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 },
2690 { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 },
2691 { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 },
2692 { NULL, 0, 0, 0, 0 }
2695 static const struct bfd_elf_special_section * const special_sections[] =
2697 special_sections_b, /* 'b' */
2698 special_sections_c, /* 'c' */
2699 special_sections_d, /* 'd' */
2701 special_sections_f, /* 'f' */
2702 special_sections_g, /* 'g' */
2703 special_sections_h, /* 'h' */
2704 special_sections_i, /* 'i' */
2707 special_sections_l, /* 'l' */
2709 special_sections_n, /* 'n' */
2711 special_sections_p, /* 'p' */
2713 special_sections_r, /* 'r' */
2714 special_sections_s, /* 's' */
2715 special_sections_t, /* 't' */
2721 special_sections_z /* 'z' */
2724 const struct bfd_elf_special_section *
2725 _bfd_elf_get_special_section (const char *name,
2726 const struct bfd_elf_special_section *spec,
2732 len = strlen (name);
2734 for (i = 0; spec[i].prefix != NULL; i++)
2737 int prefix_len = spec[i].prefix_length;
2739 if (len < prefix_len)
2741 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2744 suffix_len = spec[i].suffix_length;
2745 if (suffix_len <= 0)
2747 if (name[prefix_len] != 0)
2749 if (suffix_len == 0)
2751 if (name[prefix_len] != '.'
2752 && (suffix_len == -2
2753 || (rela && spec[i].type == SHT_REL)))
2759 if (len < prefix_len + suffix_len)
2761 if (memcmp (name + len - suffix_len,
2762 spec[i].prefix + prefix_len,
2772 const struct bfd_elf_special_section *
2773 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2776 const struct bfd_elf_special_section *spec;
2777 const struct elf_backend_data *bed;
2779 /* See if this is one of the special sections. */
2780 if (sec->name == NULL)
2783 bed = get_elf_backend_data (abfd);
2784 spec = bed->special_sections;
2787 spec = _bfd_elf_get_special_section (sec->name,
2788 bed->special_sections,
2794 if (sec->name[0] != '.')
2797 i = sec->name[1] - 'b';
2798 if (i < 0 || i > 'z' - 'b')
2801 spec = special_sections[i];
2806 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2810 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2812 struct bfd_elf_section_data *sdata;
2813 const struct elf_backend_data *bed;
2814 const struct bfd_elf_special_section *ssect;
2816 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2819 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd,
2823 sec->used_by_bfd = sdata;
2826 /* Indicate whether or not this section should use RELA relocations. */
2827 bed = get_elf_backend_data (abfd);
2828 sec->use_rela_p = bed->default_use_rela_p;
2830 /* When we read a file, we don't need to set ELF section type and
2831 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2832 anyway. We will set ELF section type and flags for all linker
2833 created sections. If user specifies BFD section flags, we will
2834 set ELF section type and flags based on BFD section flags in
2835 elf_fake_sections. Special handling for .init_array/.fini_array
2836 output sections since they may contain .ctors/.dtors input
2837 sections. We don't want _bfd_elf_init_private_section_data to
2838 copy ELF section type from .ctors/.dtors input sections. */
2839 if (abfd->direction != read_direction
2840 || (sec->flags & SEC_LINKER_CREATED) != 0)
2842 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2845 || (sec->flags & SEC_LINKER_CREATED) != 0
2846 || ssect->type == SHT_INIT_ARRAY
2847 || ssect->type == SHT_FINI_ARRAY))
2849 elf_section_type (sec) = ssect->type;
2850 elf_section_flags (sec) = ssect->attr;
2854 return _bfd_generic_new_section_hook (abfd, sec);
2857 /* Create a new bfd section from an ELF program header.
2859 Since program segments have no names, we generate a synthetic name
2860 of the form segment<NUM>, where NUM is generally the index in the
2861 program header table. For segments that are split (see below) we
2862 generate the names segment<NUM>a and segment<NUM>b.
2864 Note that some program segments may have a file size that is different than
2865 (less than) the memory size. All this means is that at execution the
2866 system must allocate the amount of memory specified by the memory size,
2867 but only initialize it with the first "file size" bytes read from the
2868 file. This would occur for example, with program segments consisting
2869 of combined data+bss.
2871 To handle the above situation, this routine generates TWO bfd sections
2872 for the single program segment. The first has the length specified by
2873 the file size of the segment, and the second has the length specified
2874 by the difference between the two sizes. In effect, the segment is split
2875 into its initialized and uninitialized parts.
2880 _bfd_elf_make_section_from_phdr (bfd *abfd,
2881 Elf_Internal_Phdr *hdr,
2883 const char *type_name)
2891 split = ((hdr->p_memsz > 0)
2892 && (hdr->p_filesz > 0)
2893 && (hdr->p_memsz > hdr->p_filesz));
2895 if (hdr->p_filesz > 0)
2897 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "a" : "");
2898 len = strlen (namebuf) + 1;
2899 name = (char *) bfd_alloc (abfd, len);
2902 memcpy (name, namebuf, len);
2903 newsect = bfd_make_section (abfd, name);
2904 if (newsect == NULL)
2906 newsect->vma = hdr->p_vaddr;
2907 newsect->lma = hdr->p_paddr;
2908 newsect->size = hdr->p_filesz;
2909 newsect->filepos = hdr->p_offset;
2910 newsect->flags |= SEC_HAS_CONTENTS;
2911 newsect->alignment_power = bfd_log2 (hdr->p_align);
2912 if (hdr->p_type == PT_LOAD)
2914 newsect->flags |= SEC_ALLOC;
2915 newsect->flags |= SEC_LOAD;
2916 if (hdr->p_flags & PF_X)
2918 /* FIXME: all we known is that it has execute PERMISSION,
2920 newsect->flags |= SEC_CODE;
2923 if (!(hdr->p_flags & PF_W))
2925 newsect->flags |= SEC_READONLY;
2929 if (hdr->p_memsz > hdr->p_filesz)
2933 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "b" : "");
2934 len = strlen (namebuf) + 1;
2935 name = (char *) bfd_alloc (abfd, len);
2938 memcpy (name, namebuf, len);
2939 newsect = bfd_make_section (abfd, name);
2940 if (newsect == NULL)
2942 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2943 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2944 newsect->size = hdr->p_memsz - hdr->p_filesz;
2945 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2946 align = newsect->vma & -newsect->vma;
2947 if (align == 0 || align > hdr->p_align)
2948 align = hdr->p_align;
2949 newsect->alignment_power = bfd_log2 (align);
2950 if (hdr->p_type == PT_LOAD)
2952 /* Hack for gdb. Segments that have not been modified do
2953 not have their contents written to a core file, on the
2954 assumption that a debugger can find the contents in the
2955 executable. We flag this case by setting the fake
2956 section size to zero. Note that "real" bss sections will
2957 always have their contents dumped to the core file. */
2958 if (bfd_get_format (abfd) == bfd_core)
2960 newsect->flags |= SEC_ALLOC;
2961 if (hdr->p_flags & PF_X)
2962 newsect->flags |= SEC_CODE;
2964 if (!(hdr->p_flags & PF_W))
2965 newsect->flags |= SEC_READONLY;
2972 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int hdr_index)
2974 const struct elf_backend_data *bed;
2976 switch (hdr->p_type)
2979 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "null");
2982 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "load");
2985 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "dynamic");
2988 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "interp");
2991 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "note"))
2993 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2998 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "shlib");
3001 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "phdr");
3003 case PT_GNU_EH_FRAME:
3004 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index,
3008 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "stack");
3011 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "relro");
3014 /* Check for any processor-specific program segment types. */
3015 bed = get_elf_backend_data (abfd);
3016 return bed->elf_backend_section_from_phdr (abfd, hdr, hdr_index, "proc");
3020 /* Return the REL_HDR for SEC, assuming there is only a single one, either
3024 _bfd_elf_single_rel_hdr (asection *sec)
3026 if (elf_section_data (sec)->rel.hdr)
3028 BFD_ASSERT (elf_section_data (sec)->rela.hdr == NULL);
3029 return elf_section_data (sec)->rel.hdr;
3032 return elf_section_data (sec)->rela.hdr;
3036 _bfd_elf_set_reloc_sh_name (bfd *abfd,
3037 Elf_Internal_Shdr *rel_hdr,
3038 const char *sec_name,
3039 bfd_boolean use_rela_p)
3041 char *name = (char *) bfd_alloc (abfd,
3042 sizeof ".rela" + strlen (sec_name));
3046 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", sec_name);
3048 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
3050 if (rel_hdr->sh_name == (unsigned int) -1)
3056 /* Allocate and initialize a section-header for a new reloc section,
3057 containing relocations against ASECT. It is stored in RELDATA. If
3058 USE_RELA_P is TRUE, we use RELA relocations; otherwise, we use REL
3062 _bfd_elf_init_reloc_shdr (bfd *abfd,
3063 struct bfd_elf_section_reloc_data *reldata,
3064 const Elf_Internal_Shdr *sec_hdr,
3065 const char *sec_name,
3066 bfd_boolean use_rela_p,
3067 bfd_boolean delay_st_name_p)
3069 Elf_Internal_Shdr *rel_hdr;
3070 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3072 BFD_ASSERT (reldata->hdr == NULL);
3073 rel_hdr = bfd_zalloc (abfd, sizeof (*rel_hdr));
3074 reldata->hdr = rel_hdr;
3076 if (delay_st_name_p)
3077 rel_hdr->sh_name = (unsigned int) -1;
3078 else if (!_bfd_elf_set_reloc_sh_name (abfd, rel_hdr, sec_name,
3081 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
3082 rel_hdr->sh_entsize = (use_rela_p
3083 ? bed->s->sizeof_rela
3084 : bed->s->sizeof_rel);
3085 rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
3086 rel_hdr->sh_flags = sec_hdr->sh_flags & SHF_GROUP;
3087 rel_hdr->sh_addr = 0;
3088 rel_hdr->sh_size = 0;
3089 rel_hdr->sh_offset = 0;
3094 /* Return the default section type based on the passed in section flags. */
3097 bfd_elf_get_default_section_type (flagword flags)
3099 if ((flags & SEC_ALLOC) != 0
3100 && (flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
3102 return SHT_PROGBITS;
3105 struct fake_section_arg
3107 struct bfd_link_info *link_info;
3111 /* Set up an ELF internal section header for a section. */
3114 elf_fake_sections (bfd *abfd, asection *asect, void *fsarg)
3116 struct fake_section_arg *arg = (struct fake_section_arg *)fsarg;
3117 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3118 struct bfd_elf_section_data *esd = elf_section_data (asect);
3119 Elf_Internal_Shdr *this_hdr;
3120 unsigned int sh_type;
3121 const char *name = asect->name;
3122 bfd_boolean delay_st_name_p = FALSE;
3126 /* We already failed; just get out of the bfd_map_over_sections
3131 this_hdr = &esd->this_hdr;
3135 /* ld: compress DWARF debug sections with names: .debug_*. */
3136 if ((arg->link_info->compress_debug & COMPRESS_DEBUG)
3137 && (asect->flags & SEC_DEBUGGING)
3141 /* Set SEC_ELF_COMPRESS to indicate this section should be
3143 asect->flags |= SEC_ELF_COMPRESS;
3145 /* If this section will be compressed, delay adding section
3146 name to section name section after it is compressed in
3147 _bfd_elf_assign_file_positions_for_non_load. */
3148 delay_st_name_p = TRUE;
3151 else if ((asect->flags & SEC_ELF_RENAME))
3153 /* objcopy: rename output DWARF debug section. */
3154 if ((abfd->flags & (BFD_DECOMPRESS | BFD_COMPRESS_GABI)))
3156 /* When we decompress or compress with SHF_COMPRESSED,
3157 convert section name from .zdebug_* to .debug_* if
3161 char *new_name = convert_zdebug_to_debug (abfd, name);
3162 if (new_name == NULL)
3170 else if (asect->compress_status == COMPRESS_SECTION_DONE)
3172 /* PR binutils/18087: Compression does not always make a
3173 section smaller. So only rename the section when
3174 compression has actually taken place. If input section
3175 name is .zdebug_*, we should never compress it again. */
3176 char *new_name = convert_debug_to_zdebug (abfd, name);
3177 if (new_name == NULL)
3182 BFD_ASSERT (name[1] != 'z');
3187 if (delay_st_name_p)
3188 this_hdr->sh_name = (unsigned int) -1;
3192 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3194 if (this_hdr->sh_name == (unsigned int) -1)
3201 /* Don't clear sh_flags. Assembler may set additional bits. */
3203 if ((asect->flags & SEC_ALLOC) != 0
3204 || asect->user_set_vma)
3205 this_hdr->sh_addr = asect->vma;
3207 this_hdr->sh_addr = 0;
3209 this_hdr->sh_offset = 0;
3210 this_hdr->sh_size = asect->size;
3211 this_hdr->sh_link = 0;
3212 /* PR 17512: file: 0eb809fe, 8b0535ee. */
3213 if (asect->alignment_power >= (sizeof (bfd_vma) * 8) - 1)
3216 /* xgettext:c-format */
3217 (_("%B: error: Alignment power %d of section `%A' is too big"),
3218 abfd, asect->alignment_power, asect);
3222 this_hdr->sh_addralign = (bfd_vma) 1 << asect->alignment_power;
3223 /* The sh_entsize and sh_info fields may have been set already by
3224 copy_private_section_data. */
3226 this_hdr->bfd_section = asect;
3227 this_hdr->contents = NULL;
3229 /* If the section type is unspecified, we set it based on
3231 if ((asect->flags & SEC_GROUP) != 0)
3232 sh_type = SHT_GROUP;
3234 sh_type = bfd_elf_get_default_section_type (asect->flags);
3236 if (this_hdr->sh_type == SHT_NULL)
3237 this_hdr->sh_type = sh_type;
3238 else if (this_hdr->sh_type == SHT_NOBITS
3239 && sh_type == SHT_PROGBITS
3240 && (asect->flags & SEC_ALLOC) != 0)
3242 /* Warn if we are changing a NOBITS section to PROGBITS, but
3243 allow the link to proceed. This can happen when users link
3244 non-bss input sections to bss output sections, or emit data
3245 to a bss output section via a linker script. */
3247 (_("warning: section `%A' type changed to PROGBITS"), asect);
3248 this_hdr->sh_type = sh_type;
3251 switch (this_hdr->sh_type)
3262 case SHT_INIT_ARRAY:
3263 case SHT_FINI_ARRAY:
3264 case SHT_PREINIT_ARRAY:
3265 this_hdr->sh_entsize = bed->s->arch_size / 8;
3269 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
3273 this_hdr->sh_entsize = bed->s->sizeof_sym;
3277 this_hdr->sh_entsize = bed->s->sizeof_dyn;
3281 if (get_elf_backend_data (abfd)->may_use_rela_p)
3282 this_hdr->sh_entsize = bed->s->sizeof_rela;
3286 if (get_elf_backend_data (abfd)->may_use_rel_p)
3287 this_hdr->sh_entsize = bed->s->sizeof_rel;
3290 case SHT_GNU_versym:
3291 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
3294 case SHT_GNU_verdef:
3295 this_hdr->sh_entsize = 0;
3296 /* objcopy or strip will copy over sh_info, but may not set
3297 cverdefs. The linker will set cverdefs, but sh_info will be
3299 if (this_hdr->sh_info == 0)
3300 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
3302 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
3303 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
3306 case SHT_GNU_verneed:
3307 this_hdr->sh_entsize = 0;
3308 /* objcopy or strip will copy over sh_info, but may not set
3309 cverrefs. The linker will set cverrefs, but sh_info will be
3311 if (this_hdr->sh_info == 0)
3312 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
3314 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
3315 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
3319 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
3323 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
3327 if ((asect->flags & SEC_ALLOC) != 0)
3328 this_hdr->sh_flags |= SHF_ALLOC;
3329 if ((asect->flags & SEC_READONLY) == 0)
3330 this_hdr->sh_flags |= SHF_WRITE;
3331 if ((asect->flags & SEC_CODE) != 0)
3332 this_hdr->sh_flags |= SHF_EXECINSTR;
3333 if ((asect->flags & SEC_MERGE) != 0)
3335 this_hdr->sh_flags |= SHF_MERGE;
3336 this_hdr->sh_entsize = asect->entsize;
3338 if ((asect->flags & SEC_STRINGS) != 0)
3339 this_hdr->sh_flags |= SHF_STRINGS;
3340 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
3341 this_hdr->sh_flags |= SHF_GROUP;
3342 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
3344 this_hdr->sh_flags |= SHF_TLS;
3345 if (asect->size == 0
3346 && (asect->flags & SEC_HAS_CONTENTS) == 0)
3348 struct bfd_link_order *o = asect->map_tail.link_order;
3350 this_hdr->sh_size = 0;
3353 this_hdr->sh_size = o->offset + o->size;
3354 if (this_hdr->sh_size != 0)
3355 this_hdr->sh_type = SHT_NOBITS;
3359 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
3360 this_hdr->sh_flags |= SHF_EXCLUDE;
3362 /* If the section has relocs, set up a section header for the
3363 SHT_REL[A] section. If two relocation sections are required for
3364 this section, it is up to the processor-specific back-end to
3365 create the other. */
3366 if ((asect->flags & SEC_RELOC) != 0)
3368 /* When doing a relocatable link, create both REL and RELA sections if
3371 /* Do the normal setup if we wouldn't create any sections here. */
3372 && esd->rel.count + esd->rela.count > 0
3373 && (bfd_link_relocatable (arg->link_info)
3374 || arg->link_info->emitrelocations))
3376 if (esd->rel.count && esd->rel.hdr == NULL
3377 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rel, this_hdr, name,
3378 FALSE, delay_st_name_p))
3383 if (esd->rela.count && esd->rela.hdr == NULL
3384 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rela, this_hdr, name,
3385 TRUE, delay_st_name_p))
3391 else if (!_bfd_elf_init_reloc_shdr (abfd,
3393 ? &esd->rela : &esd->rel),
3404 /* Check for processor-specific section types. */
3405 sh_type = this_hdr->sh_type;
3406 if (bed->elf_backend_fake_sections
3407 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
3413 if (sh_type == SHT_NOBITS && asect->size != 0)
3415 /* Don't change the header type from NOBITS if we are being
3416 called for objcopy --only-keep-debug. */
3417 this_hdr->sh_type = sh_type;
3421 /* Fill in the contents of a SHT_GROUP section. Called from
3422 _bfd_elf_compute_section_file_positions for gas, objcopy, and
3423 when ELF targets use the generic linker, ld. Called for ld -r
3424 from bfd_elf_final_link. */
3427 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
3429 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
3430 asection *elt, *first;
3434 /* Ignore linker created group section. See elfNN_ia64_object_p in
3436 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
3440 if (elf_section_data (sec)->this_hdr.sh_info == 0)
3442 unsigned long symindx = 0;
3444 /* elf_group_id will have been set up by objcopy and the
3446 if (elf_group_id (sec) != NULL)
3447 symindx = elf_group_id (sec)->udata.i;
3451 /* If called from the assembler, swap_out_syms will have set up
3452 elf_section_syms. */
3453 BFD_ASSERT (elf_section_syms (abfd) != NULL);
3454 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
3456 elf_section_data (sec)->this_hdr.sh_info = symindx;
3458 else if (elf_section_data (sec)->this_hdr.sh_info == (unsigned int) -2)
3460 /* The ELF backend linker sets sh_info to -2 when the group
3461 signature symbol is global, and thus the index can't be
3462 set until all local symbols are output. */
3464 struct bfd_elf_section_data *sec_data;
3465 unsigned long symndx;
3466 unsigned long extsymoff;
3467 struct elf_link_hash_entry *h;
3469 /* The point of this little dance to the first SHF_GROUP section
3470 then back to the SHT_GROUP section is that this gets us to
3471 the SHT_GROUP in the input object. */
3472 igroup = elf_sec_group (elf_next_in_group (sec));
3473 sec_data = elf_section_data (igroup);
3474 symndx = sec_data->this_hdr.sh_info;
3476 if (!elf_bad_symtab (igroup->owner))
3478 Elf_Internal_Shdr *symtab_hdr;
3480 symtab_hdr = &elf_tdata (igroup->owner)->symtab_hdr;
3481 extsymoff = symtab_hdr->sh_info;
3483 h = elf_sym_hashes (igroup->owner)[symndx - extsymoff];
3484 while (h->root.type == bfd_link_hash_indirect
3485 || h->root.type == bfd_link_hash_warning)
3486 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3488 elf_section_data (sec)->this_hdr.sh_info = h->indx;
3491 /* The contents won't be allocated for "ld -r" or objcopy. */
3493 if (sec->contents == NULL)
3496 sec->contents = (unsigned char *) bfd_alloc (abfd, sec->size);
3498 /* Arrange for the section to be written out. */
3499 elf_section_data (sec)->this_hdr.contents = sec->contents;
3500 if (sec->contents == NULL)
3507 loc = sec->contents + sec->size;
3509 /* Get the pointer to the first section in the group that gas
3510 squirreled away here. objcopy arranges for this to be set to the
3511 start of the input section group. */
3512 first = elt = elf_next_in_group (sec);
3514 /* First element is a flag word. Rest of section is elf section
3515 indices for all the sections of the group. Write them backwards
3516 just to keep the group in the same order as given in .section
3517 directives, not that it matters. */
3524 s = s->output_section;
3526 && !bfd_is_abs_section (s))
3528 struct bfd_elf_section_data *elf_sec = elf_section_data (s);
3529 if (elf_sec->rel.hdr != NULL)
3532 H_PUT_32 (abfd, elf_sec->rel.idx, loc);
3534 if (elf_sec->rela.hdr != NULL)
3537 H_PUT_32 (abfd, elf_sec->rela.idx, loc);
3540 H_PUT_32 (abfd, elf_sec->this_idx, loc);
3542 elt = elf_next_in_group (elt);
3548 BFD_ASSERT (loc == sec->contents);
3550 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
3553 /* Given NAME, the name of a relocation section stripped of its
3554 .rel/.rela prefix, return the section in ABFD to which the
3555 relocations apply. */
3558 _bfd_elf_plt_get_reloc_section (bfd *abfd, const char *name)
3560 /* If a target needs .got.plt section, relocations in rela.plt/rel.plt
3561 section likely apply to .got.plt or .got section. */
3562 if (get_elf_backend_data (abfd)->want_got_plt
3563 && strcmp (name, ".plt") == 0)
3568 sec = bfd_get_section_by_name (abfd, name);
3574 return bfd_get_section_by_name (abfd, name);
3577 /* Return the section to which RELOC_SEC applies. */
3580 elf_get_reloc_section (asection *reloc_sec)
3585 const struct elf_backend_data *bed;
3587 type = elf_section_data (reloc_sec)->this_hdr.sh_type;
3588 if (type != SHT_REL && type != SHT_RELA)
3591 /* We look up the section the relocs apply to by name. */
3592 name = reloc_sec->name;
3593 if (strncmp (name, ".rel", 4) != 0)
3596 if (type == SHT_RELA && *name++ != 'a')
3599 abfd = reloc_sec->owner;
3600 bed = get_elf_backend_data (abfd);
3601 return bed->get_reloc_section (abfd, name);
3604 /* Assign all ELF section numbers. The dummy first section is handled here
3605 too. The link/info pointers for the standard section types are filled
3606 in here too, while we're at it. */
3609 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
3611 struct elf_obj_tdata *t = elf_tdata (abfd);
3613 unsigned int section_number;
3614 Elf_Internal_Shdr **i_shdrp;
3615 struct bfd_elf_section_data *d;
3616 bfd_boolean need_symtab;
3620 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
3622 /* SHT_GROUP sections are in relocatable files only. */
3623 if (link_info == NULL || !link_info->resolve_section_groups)
3625 size_t reloc_count = 0;
3627 /* Put SHT_GROUP sections first. */
3628 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3630 d = elf_section_data (sec);
3632 if (d->this_hdr.sh_type == SHT_GROUP)
3634 if (sec->flags & SEC_LINKER_CREATED)
3636 /* Remove the linker created SHT_GROUP sections. */
3637 bfd_section_list_remove (abfd, sec);
3638 abfd->section_count--;
3641 d->this_idx = section_number++;
3644 /* Count relocations. */
3645 reloc_count += sec->reloc_count;
3648 /* Clear HAS_RELOC if there are no relocations. */
3649 if (reloc_count == 0)
3650 abfd->flags &= ~HAS_RELOC;
3653 for (sec = abfd->sections; sec; sec = sec->next)
3655 d = elf_section_data (sec);
3657 if (d->this_hdr.sh_type != SHT_GROUP)
3658 d->this_idx = section_number++;
3659 if (d->this_hdr.sh_name != (unsigned int) -1)
3660 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
3663 d->rel.idx = section_number++;
3664 if (d->rel.hdr->sh_name != (unsigned int) -1)
3665 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel.hdr->sh_name);
3672 d->rela.idx = section_number++;
3673 if (d->rela.hdr->sh_name != (unsigned int) -1)
3674 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rela.hdr->sh_name);
3680 need_symtab = (bfd_get_symcount (abfd) > 0
3681 || (link_info == NULL
3682 && ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3686 elf_onesymtab (abfd) = section_number++;
3687 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
3688 if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
3690 elf_section_list * entry;
3692 BFD_ASSERT (elf_symtab_shndx_list (abfd) == NULL);
3694 entry = bfd_zalloc (abfd, sizeof * entry);
3695 entry->ndx = section_number++;
3696 elf_symtab_shndx_list (abfd) = entry;
3698 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3699 ".symtab_shndx", FALSE);
3700 if (entry->hdr.sh_name == (unsigned int) -1)
3703 elf_strtab_sec (abfd) = section_number++;
3704 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
3707 elf_shstrtab_sec (abfd) = section_number++;
3708 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
3709 elf_elfheader (abfd)->e_shstrndx = elf_shstrtab_sec (abfd);
3711 if (section_number >= SHN_LORESERVE)
3713 /* xgettext:c-format */
3714 _bfd_error_handler (_("%B: too many sections: %u"),
3715 abfd, section_number);
3719 elf_numsections (abfd) = section_number;
3720 elf_elfheader (abfd)->e_shnum = section_number;
3722 /* Set up the list of section header pointers, in agreement with the
3724 i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc2 (abfd, section_number,
3725 sizeof (Elf_Internal_Shdr *));
3726 if (i_shdrp == NULL)
3729 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd,
3730 sizeof (Elf_Internal_Shdr));
3731 if (i_shdrp[0] == NULL)
3733 bfd_release (abfd, i_shdrp);
3737 elf_elfsections (abfd) = i_shdrp;
3739 i_shdrp[elf_shstrtab_sec (abfd)] = &t->shstrtab_hdr;
3742 i_shdrp[elf_onesymtab (abfd)] = &t->symtab_hdr;
3743 if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF))
3745 elf_section_list * entry = elf_symtab_shndx_list (abfd);
3746 BFD_ASSERT (entry != NULL);
3747 i_shdrp[entry->ndx] = & entry->hdr;
3748 entry->hdr.sh_link = elf_onesymtab (abfd);
3750 i_shdrp[elf_strtab_sec (abfd)] = &t->strtab_hdr;
3751 t->symtab_hdr.sh_link = elf_strtab_sec (abfd);
3754 for (sec = abfd->sections; sec; sec = sec->next)
3758 d = elf_section_data (sec);
3760 i_shdrp[d->this_idx] = &d->this_hdr;
3761 if (d->rel.idx != 0)
3762 i_shdrp[d->rel.idx] = d->rel.hdr;
3763 if (d->rela.idx != 0)
3764 i_shdrp[d->rela.idx] = d->rela.hdr;
3766 /* Fill in the sh_link and sh_info fields while we're at it. */
3768 /* sh_link of a reloc section is the section index of the symbol
3769 table. sh_info is the section index of the section to which
3770 the relocation entries apply. */
3771 if (d->rel.idx != 0)
3773 d->rel.hdr->sh_link = elf_onesymtab (abfd);
3774 d->rel.hdr->sh_info = d->this_idx;
3775 d->rel.hdr->sh_flags |= SHF_INFO_LINK;
3777 if (d->rela.idx != 0)
3779 d->rela.hdr->sh_link = elf_onesymtab (abfd);
3780 d->rela.hdr->sh_info = d->this_idx;
3781 d->rela.hdr->sh_flags |= SHF_INFO_LINK;
3784 /* We need to set up sh_link for SHF_LINK_ORDER. */
3785 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3787 s = elf_linked_to_section (sec);
3790 /* elf_linked_to_section points to the input section. */
3791 if (link_info != NULL)
3793 /* Check discarded linkonce section. */
3794 if (discarded_section (s))
3798 /* xgettext:c-format */
3799 (_("%B: sh_link of section `%A' points to"
3800 " discarded section `%A' of `%B'"),
3801 abfd, d->this_hdr.bfd_section,
3803 /* Point to the kept section if it has the same
3804 size as the discarded one. */
3805 kept = _bfd_elf_check_kept_section (s, link_info);
3808 bfd_set_error (bfd_error_bad_value);
3814 s = s->output_section;
3815 BFD_ASSERT (s != NULL);
3819 /* Handle objcopy. */
3820 if (s->output_section == NULL)
3823 /* xgettext:c-format */
3824 (_("%B: sh_link of section `%A' points to"
3825 " removed section `%A' of `%B'"),
3826 abfd, d->this_hdr.bfd_section, s, s->owner);
3827 bfd_set_error (bfd_error_bad_value);
3830 s = s->output_section;
3832 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3837 The Intel C compiler generates SHT_IA_64_UNWIND with
3838 SHF_LINK_ORDER. But it doesn't set the sh_link or
3839 sh_info fields. Hence we could get the situation
3841 const struct elf_backend_data *bed
3842 = get_elf_backend_data (abfd);
3843 if (bed->link_order_error_handler)
3844 bed->link_order_error_handler
3845 /* xgettext:c-format */
3846 (_("%B: warning: sh_link not set for section `%A'"),
3851 switch (d->this_hdr.sh_type)
3855 /* A reloc section which we are treating as a normal BFD
3856 section. sh_link is the section index of the symbol
3857 table. sh_info is the section index of the section to
3858 which the relocation entries apply. We assume that an
3859 allocated reloc section uses the dynamic symbol table.
3860 FIXME: How can we be sure? */
3861 s = bfd_get_section_by_name (abfd, ".dynsym");
3863 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3865 s = elf_get_reloc_section (sec);
3868 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3869 d->this_hdr.sh_flags |= SHF_INFO_LINK;
3874 /* We assume that a section named .stab*str is a stabs
3875 string section. We look for a section with the same name
3876 but without the trailing ``str'', and set its sh_link
3877 field to point to this section. */
3878 if (CONST_STRNEQ (sec->name, ".stab")
3879 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3884 len = strlen (sec->name);
3885 alc = (char *) bfd_malloc (len - 2);
3888 memcpy (alc, sec->name, len - 3);
3889 alc[len - 3] = '\0';
3890 s = bfd_get_section_by_name (abfd, alc);
3894 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3896 /* This is a .stab section. */
3897 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3898 elf_section_data (s)->this_hdr.sh_entsize
3899 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3906 case SHT_GNU_verneed:
3907 case SHT_GNU_verdef:
3908 /* sh_link is the section header index of the string table
3909 used for the dynamic entries, or the symbol table, or the
3911 s = bfd_get_section_by_name (abfd, ".dynstr");
3913 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3916 case SHT_GNU_LIBLIST:
3917 /* sh_link is the section header index of the prelink library
3918 list used for the dynamic entries, or the symbol table, or
3919 the version strings. */
3920 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3921 ? ".dynstr" : ".gnu.libstr");
3923 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3928 case SHT_GNU_versym:
3929 /* sh_link is the section header index of the symbol table
3930 this hash table or version table is for. */
3931 s = bfd_get_section_by_name (abfd, ".dynsym");
3933 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3937 d->this_hdr.sh_link = elf_onesymtab (abfd);
3941 /* Delay setting sh_name to _bfd_elf_write_object_contents so that
3942 _bfd_elf_assign_file_positions_for_non_load can convert DWARF
3943 debug section name from .debug_* to .zdebug_* if needed. */
3949 sym_is_global (bfd *abfd, asymbol *sym)
3951 /* If the backend has a special mapping, use it. */
3952 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3953 if (bed->elf_backend_sym_is_global)
3954 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3956 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_GNU_UNIQUE)) != 0
3957 || bfd_is_und_section (bfd_get_section (sym))
3958 || bfd_is_com_section (bfd_get_section (sym)));
3961 /* Filter global symbols of ABFD to include in the import library. All
3962 SYMCOUNT symbols of ABFD can be examined from their pointers in
3963 SYMS. Pointers of symbols to keep should be stored contiguously at
3964 the beginning of that array.
3966 Returns the number of symbols to keep. */
3969 _bfd_elf_filter_global_symbols (bfd *abfd, struct bfd_link_info *info,
3970 asymbol **syms, long symcount)
3972 long src_count, dst_count = 0;
3974 for (src_count = 0; src_count < symcount; src_count++)
3976 asymbol *sym = syms[src_count];
3977 char *name = (char *) bfd_asymbol_name (sym);
3978 struct bfd_link_hash_entry *h;
3980 if (!sym_is_global (abfd, sym))
3983 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, FALSE);
3986 if (h->type != bfd_link_hash_defined && h->type != bfd_link_hash_defweak)
3988 if (h->linker_def || h->ldscript_def)
3991 syms[dst_count++] = sym;
3994 syms[dst_count] = NULL;
3999 /* Don't output section symbols for sections that are not going to be
4000 output, that are duplicates or there is no BFD section. */
4003 ignore_section_sym (bfd *abfd, asymbol *sym)
4005 elf_symbol_type *type_ptr;
4007 if ((sym->flags & BSF_SECTION_SYM) == 0)
4010 type_ptr = elf_symbol_from (abfd, sym);
4011 return ((type_ptr != NULL
4012 && type_ptr->internal_elf_sym.st_shndx != 0
4013 && bfd_is_abs_section (sym->section))
4014 || !(sym->section->owner == abfd
4015 || (sym->section->output_section->owner == abfd
4016 && sym->section->output_offset == 0)
4017 || bfd_is_abs_section (sym->section)));
4020 /* Map symbol from it's internal number to the external number, moving
4021 all local symbols to be at the head of the list. */
4024 elf_map_symbols (bfd *abfd, unsigned int *pnum_locals)
4026 unsigned int symcount = bfd_get_symcount (abfd);
4027 asymbol **syms = bfd_get_outsymbols (abfd);
4028 asymbol **sect_syms;
4029 unsigned int num_locals = 0;
4030 unsigned int num_globals = 0;
4031 unsigned int num_locals2 = 0;
4032 unsigned int num_globals2 = 0;
4033 unsigned int max_index = 0;
4039 fprintf (stderr, "elf_map_symbols\n");
4043 for (asect = abfd->sections; asect; asect = asect->next)
4045 if (max_index < asect->index)
4046 max_index = asect->index;
4050 sect_syms = (asymbol **) bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
4051 if (sect_syms == NULL)
4053 elf_section_syms (abfd) = sect_syms;
4054 elf_num_section_syms (abfd) = max_index;
4056 /* Init sect_syms entries for any section symbols we have already
4057 decided to output. */
4058 for (idx = 0; idx < symcount; idx++)
4060 asymbol *sym = syms[idx];
4062 if ((sym->flags & BSF_SECTION_SYM) != 0
4064 && !ignore_section_sym (abfd, sym)
4065 && !bfd_is_abs_section (sym->section))
4067 asection *sec = sym->section;
4069 if (sec->owner != abfd)
4070 sec = sec->output_section;
4072 sect_syms[sec->index] = syms[idx];
4076 /* Classify all of the symbols. */
4077 for (idx = 0; idx < symcount; idx++)
4079 if (sym_is_global (abfd, syms[idx]))
4081 else if (!ignore_section_sym (abfd, syms[idx]))
4085 /* We will be adding a section symbol for each normal BFD section. Most
4086 sections will already have a section symbol in outsymbols, but
4087 eg. SHT_GROUP sections will not, and we need the section symbol mapped
4088 at least in that case. */
4089 for (asect = abfd->sections; asect; asect = asect->next)
4091 if (sect_syms[asect->index] == NULL)
4093 if (!sym_is_global (abfd, asect->symbol))
4100 /* Now sort the symbols so the local symbols are first. */
4101 new_syms = (asymbol **) bfd_alloc2 (abfd, num_locals + num_globals,
4102 sizeof (asymbol *));
4104 if (new_syms == NULL)
4107 for (idx = 0; idx < symcount; idx++)
4109 asymbol *sym = syms[idx];
4112 if (sym_is_global (abfd, sym))
4113 i = num_locals + num_globals2++;
4114 else if (!ignore_section_sym (abfd, sym))
4119 sym->udata.i = i + 1;
4121 for (asect = abfd->sections; asect; asect = asect->next)
4123 if (sect_syms[asect->index] == NULL)
4125 asymbol *sym = asect->symbol;
4128 sect_syms[asect->index] = sym;
4129 if (!sym_is_global (abfd, sym))
4132 i = num_locals + num_globals2++;
4134 sym->udata.i = i + 1;
4138 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
4140 *pnum_locals = num_locals;
4144 /* Align to the maximum file alignment that could be required for any
4145 ELF data structure. */
4147 static inline file_ptr
4148 align_file_position (file_ptr off, int align)
4150 return (off + align - 1) & ~(align - 1);
4153 /* Assign a file position to a section, optionally aligning to the
4154 required section alignment. */
4157 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
4161 if (align && i_shdrp->sh_addralign > 1)
4162 offset = BFD_ALIGN (offset, i_shdrp->sh_addralign);
4163 i_shdrp->sh_offset = offset;
4164 if (i_shdrp->bfd_section != NULL)
4165 i_shdrp->bfd_section->filepos = offset;
4166 if (i_shdrp->sh_type != SHT_NOBITS)
4167 offset += i_shdrp->sh_size;
4171 /* Compute the file positions we are going to put the sections at, and
4172 otherwise prepare to begin writing out the ELF file. If LINK_INFO
4173 is not NULL, this is being called by the ELF backend linker. */
4176 _bfd_elf_compute_section_file_positions (bfd *abfd,
4177 struct bfd_link_info *link_info)
4179 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4180 struct fake_section_arg fsargs;
4182 struct elf_strtab_hash *strtab = NULL;
4183 Elf_Internal_Shdr *shstrtab_hdr;
4184 bfd_boolean need_symtab;
4186 if (abfd->output_has_begun)
4189 /* Do any elf backend specific processing first. */
4190 if (bed->elf_backend_begin_write_processing)
4191 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
4193 if (! prep_headers (abfd))
4196 /* Post process the headers if necessary. */
4197 (*bed->elf_backend_post_process_headers) (abfd, link_info);
4199 fsargs.failed = FALSE;
4200 fsargs.link_info = link_info;
4201 bfd_map_over_sections (abfd, elf_fake_sections, &fsargs);
4205 if (!assign_section_numbers (abfd, link_info))
4208 /* The backend linker builds symbol table information itself. */
4209 need_symtab = (link_info == NULL
4210 && (bfd_get_symcount (abfd) > 0
4211 || ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
4215 /* Non-zero if doing a relocatable link. */
4216 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
4218 if (! swap_out_syms (abfd, &strtab, relocatable_p))
4223 if (link_info == NULL)
4225 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
4230 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
4231 /* sh_name was set in prep_headers. */
4232 shstrtab_hdr->sh_type = SHT_STRTAB;
4233 shstrtab_hdr->sh_flags = bed->elf_strtab_flags;
4234 shstrtab_hdr->sh_addr = 0;
4235 /* sh_size is set in _bfd_elf_assign_file_positions_for_non_load. */
4236 shstrtab_hdr->sh_entsize = 0;
4237 shstrtab_hdr->sh_link = 0;
4238 shstrtab_hdr->sh_info = 0;
4239 /* sh_offset is set in _bfd_elf_assign_file_positions_for_non_load. */
4240 shstrtab_hdr->sh_addralign = 1;
4242 if (!assign_file_positions_except_relocs (abfd, link_info))
4248 Elf_Internal_Shdr *hdr;
4250 off = elf_next_file_pos (abfd);
4252 hdr = & elf_symtab_hdr (abfd);
4253 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4255 if (elf_symtab_shndx_list (abfd) != NULL)
4257 hdr = & elf_symtab_shndx_list (abfd)->hdr;
4258 if (hdr->sh_size != 0)
4259 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4260 /* FIXME: What about other symtab_shndx sections in the list ? */
4263 hdr = &elf_tdata (abfd)->strtab_hdr;
4264 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4266 elf_next_file_pos (abfd) = off;
4268 /* Now that we know where the .strtab section goes, write it
4270 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
4271 || ! _bfd_elf_strtab_emit (abfd, strtab))
4273 _bfd_elf_strtab_free (strtab);
4276 abfd->output_has_begun = TRUE;
4281 /* Make an initial estimate of the size of the program header. If we
4282 get the number wrong here, we'll redo section placement. */
4284 static bfd_size_type
4285 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
4289 const struct elf_backend_data *bed;
4291 /* Assume we will need exactly two PT_LOAD segments: one for text
4292 and one for data. */
4295 s = bfd_get_section_by_name (abfd, ".interp");
4296 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4298 /* If we have a loadable interpreter section, we need a
4299 PT_INTERP segment. In this case, assume we also need a
4300 PT_PHDR segment, although that may not be true for all
4305 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4307 /* We need a PT_DYNAMIC segment. */
4311 if (info != NULL && info->relro)
4313 /* We need a PT_GNU_RELRO segment. */
4317 if (elf_eh_frame_hdr (abfd))
4319 /* We need a PT_GNU_EH_FRAME segment. */
4323 if (elf_stack_flags (abfd))
4325 /* We need a PT_GNU_STACK segment. */
4329 for (s = abfd->sections; s != NULL; s = s->next)
4331 if ((s->flags & SEC_LOAD) != 0
4332 && CONST_STRNEQ (s->name, ".note"))
4334 /* We need a PT_NOTE segment. */
4336 /* Try to create just one PT_NOTE segment
4337 for all adjacent loadable .note* sections.
4338 gABI requires that within a PT_NOTE segment
4339 (and also inside of each SHT_NOTE section)
4340 each note is padded to a multiple of 4 size,
4341 so we check whether the sections are correctly
4343 if (s->alignment_power == 2)
4344 while (s->next != NULL
4345 && s->next->alignment_power == 2
4346 && (s->next->flags & SEC_LOAD) != 0
4347 && CONST_STRNEQ (s->next->name, ".note"))
4352 for (s = abfd->sections; s != NULL; s = s->next)
4354 if (s->flags & SEC_THREAD_LOCAL)
4356 /* We need a PT_TLS segment. */
4362 bed = get_elf_backend_data (abfd);
4364 if ((abfd->flags & D_PAGED) != 0)
4366 /* Add a PT_GNU_MBIND segment for each mbind section. */
4367 unsigned int page_align_power = bfd_log2 (bed->commonpagesize);
4368 for (s = abfd->sections; s != NULL; s = s->next)
4369 if (elf_section_flags (s) & SHF_GNU_MBIND)
4371 if (elf_section_data (s)->this_hdr.sh_info
4375 /* xgettext:c-format */
4376 (_("%B: GNU_MBIN section `%A' has invalid sh_info field: %d"),
4377 abfd, s, elf_section_data (s)->this_hdr.sh_info);
4380 /* Align mbind section to page size. */
4381 if (s->alignment_power < page_align_power)
4382 s->alignment_power = page_align_power;
4387 /* Let the backend count up any program headers it might need. */
4388 if (bed->elf_backend_additional_program_headers)
4392 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
4398 return segs * bed->s->sizeof_phdr;
4401 /* Find the segment that contains the output_section of section. */
4404 _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section)
4406 struct elf_segment_map *m;
4407 Elf_Internal_Phdr *p;
4409 for (m = elf_seg_map (abfd), p = elf_tdata (abfd)->phdr;
4415 for (i = m->count - 1; i >= 0; i--)
4416 if (m->sections[i] == section)
4423 /* Create a mapping from a set of sections to a program segment. */
4425 static struct elf_segment_map *
4426 make_mapping (bfd *abfd,
4427 asection **sections,
4432 struct elf_segment_map *m;
4437 amt = sizeof (struct elf_segment_map);
4438 amt += (to - from - 1) * sizeof (asection *);
4439 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4443 m->p_type = PT_LOAD;
4444 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
4445 m->sections[i - from] = *hdrpp;
4446 m->count = to - from;
4448 if (from == 0 && phdr)
4450 /* Include the headers in the first PT_LOAD segment. */
4451 m->includes_filehdr = 1;
4452 m->includes_phdrs = 1;
4458 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
4461 struct elf_segment_map *
4462 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
4464 struct elf_segment_map *m;
4466 m = (struct elf_segment_map *) bfd_zalloc (abfd,
4467 sizeof (struct elf_segment_map));
4471 m->p_type = PT_DYNAMIC;
4473 m->sections[0] = dynsec;
4478 /* Possibly add or remove segments from the segment map. */
4481 elf_modify_segment_map (bfd *abfd,
4482 struct bfd_link_info *info,
4483 bfd_boolean remove_empty_load)
4485 struct elf_segment_map **m;
4486 const struct elf_backend_data *bed;
4488 /* The placement algorithm assumes that non allocated sections are
4489 not in PT_LOAD segments. We ensure this here by removing such
4490 sections from the segment map. We also remove excluded
4491 sections. Finally, any PT_LOAD segment without sections is
4493 m = &elf_seg_map (abfd);
4496 unsigned int i, new_count;
4498 for (new_count = 0, i = 0; i < (*m)->count; i++)
4500 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
4501 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
4502 || (*m)->p_type != PT_LOAD))
4504 (*m)->sections[new_count] = (*m)->sections[i];
4508 (*m)->count = new_count;
4510 if (remove_empty_load
4511 && (*m)->p_type == PT_LOAD
4513 && !(*m)->includes_phdrs)
4519 bed = get_elf_backend_data (abfd);
4520 if (bed->elf_backend_modify_segment_map != NULL)
4522 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
4529 /* Set up a mapping from BFD sections to program segments. */
4532 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
4535 struct elf_segment_map *m;
4536 asection **sections = NULL;
4537 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4538 bfd_boolean no_user_phdrs;
4540 no_user_phdrs = elf_seg_map (abfd) == NULL;
4543 info->user_phdrs = !no_user_phdrs;
4545 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
4549 struct elf_segment_map *mfirst;
4550 struct elf_segment_map **pm;
4553 unsigned int phdr_index;
4554 bfd_vma maxpagesize;
4556 bfd_boolean phdr_in_segment = TRUE;
4557 bfd_boolean writable;
4559 asection *first_tls = NULL;
4560 asection *first_mbind = NULL;
4561 asection *dynsec, *eh_frame_hdr;
4563 bfd_vma addr_mask, wrap_to = 0;
4564 bfd_boolean linker_created_pt_phdr_segment = FALSE;
4566 /* Select the allocated sections, and sort them. */
4568 sections = (asection **) bfd_malloc2 (bfd_count_sections (abfd),
4569 sizeof (asection *));
4570 if (sections == NULL)
4573 /* Calculate top address, avoiding undefined behaviour of shift
4574 left operator when shift count is equal to size of type
4576 addr_mask = ((bfd_vma) 1 << (bfd_arch_bits_per_address (abfd) - 1)) - 1;
4577 addr_mask = (addr_mask << 1) + 1;
4580 for (s = abfd->sections; s != NULL; s = s->next)
4582 if ((s->flags & SEC_ALLOC) != 0)
4586 /* A wrapping section potentially clashes with header. */
4587 if (((s->lma + s->size) & addr_mask) < (s->lma & addr_mask))
4588 wrap_to = (s->lma + s->size) & addr_mask;
4591 BFD_ASSERT (i <= bfd_count_sections (abfd));
4594 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
4596 /* Build the mapping. */
4601 /* If we have a .interp section, then create a PT_PHDR segment for
4602 the program headers and a PT_INTERP segment for the .interp
4604 s = bfd_get_section_by_name (abfd, ".interp");
4605 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4607 amt = sizeof (struct elf_segment_map);
4608 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4612 m->p_type = PT_PHDR;
4613 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
4614 m->p_flags = PF_R | PF_X;
4615 m->p_flags_valid = 1;
4616 m->includes_phdrs = 1;
4617 linker_created_pt_phdr_segment = TRUE;
4621 amt = sizeof (struct elf_segment_map);
4622 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4626 m->p_type = PT_INTERP;
4634 /* Look through the sections. We put sections in the same program
4635 segment when the start of the second section can be placed within
4636 a few bytes of the end of the first section. */
4640 maxpagesize = bed->maxpagesize;
4641 /* PR 17512: file: c8455299.
4642 Avoid divide-by-zero errors later on.
4643 FIXME: Should we abort if the maxpagesize is zero ? */
4644 if (maxpagesize == 0)
4647 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
4649 && (dynsec->flags & SEC_LOAD) == 0)
4652 /* Deal with -Ttext or something similar such that the first section
4653 is not adjacent to the program headers. This is an
4654 approximation, since at this point we don't know exactly how many
4655 program headers we will need. */
4658 bfd_size_type phdr_size = elf_program_header_size (abfd);
4660 if (phdr_size == (bfd_size_type) -1)
4661 phdr_size = get_program_header_size (abfd, info);
4662 phdr_size += bed->s->sizeof_ehdr;
4663 if ((abfd->flags & D_PAGED) == 0
4664 || (sections[0]->lma & addr_mask) < phdr_size
4665 || ((sections[0]->lma & addr_mask) % maxpagesize
4666 < phdr_size % maxpagesize)
4667 || (sections[0]->lma & addr_mask & -maxpagesize) < wrap_to)
4669 /* PR 20815: The ELF standard says that a PT_PHDR segment, if
4670 present, must be included as part of the memory image of the
4671 program. Ie it must be part of a PT_LOAD segment as well.
4672 If we have had to create our own PT_PHDR segment, but it is
4673 not going to be covered by the first PT_LOAD segment, then
4674 force the inclusion if we can... */
4675 if ((abfd->flags & D_PAGED) != 0
4676 && linker_created_pt_phdr_segment)
4677 phdr_in_segment = TRUE;
4679 phdr_in_segment = FALSE;
4683 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
4686 bfd_boolean new_segment;
4690 /* See if this section and the last one will fit in the same
4693 if (last_hdr == NULL)
4695 /* If we don't have a segment yet, then we don't need a new
4696 one (we build the last one after this loop). */
4697 new_segment = FALSE;
4699 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
4701 /* If this section has a different relation between the
4702 virtual address and the load address, then we need a new
4706 else if (hdr->lma < last_hdr->lma + last_size
4707 || last_hdr->lma + last_size < last_hdr->lma)
4709 /* If this section has a load address that makes it overlap
4710 the previous section, then we need a new segment. */
4713 /* In the next test we have to be careful when last_hdr->lma is close
4714 to the end of the address space. If the aligned address wraps
4715 around to the start of the address space, then there are no more
4716 pages left in memory and it is OK to assume that the current
4717 section can be included in the current segment. */
4718 else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
4720 && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
4723 /* If putting this section in this segment would force us to
4724 skip a page in the segment, then we need a new segment. */
4727 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
4728 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0
4729 && ((abfd->flags & D_PAGED) == 0
4730 || (((last_hdr->lma + last_size - 1) & -maxpagesize)
4731 != (hdr->lma & -maxpagesize))))
4733 /* We don't want to put a loaded section after a
4734 nonloaded (ie. bss style) section in the same segment
4735 as that will force the non-loaded section to be loaded.
4736 Consider .tbss sections as loaded for this purpose.
4737 However, like the writable/non-writable case below,
4738 if they are on the same page then they must be put
4739 in the same segment. */
4742 else if ((abfd->flags & D_PAGED) == 0)
4744 /* If the file is not demand paged, which means that we
4745 don't require the sections to be correctly aligned in the
4746 file, then there is no other reason for a new segment. */
4747 new_segment = FALSE;
4750 && (hdr->flags & SEC_READONLY) == 0
4751 && (((last_hdr->lma + last_size - 1) & -maxpagesize)
4752 != (hdr->lma & -maxpagesize)))
4754 /* We don't want to put a writable section in a read only
4755 segment, unless they are on the same page in memory
4756 anyhow. We already know that the last section does not
4757 bring us past the current section on the page, so the
4758 only case in which the new section is not on the same
4759 page as the previous section is when the previous section
4760 ends precisely on a page boundary. */
4765 /* Otherwise, we can use the same segment. */
4766 new_segment = FALSE;
4769 /* Allow interested parties a chance to override our decision. */
4770 if (last_hdr != NULL
4772 && info->callbacks->override_segment_assignment != NULL)
4774 = info->callbacks->override_segment_assignment (info, abfd, hdr,
4780 if ((hdr->flags & SEC_READONLY) == 0)
4783 /* .tbss sections effectively have zero size. */
4784 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4785 != SEC_THREAD_LOCAL)
4786 last_size = hdr->size;
4792 /* We need a new program segment. We must create a new program
4793 header holding all the sections from phdr_index until hdr. */
4795 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4802 if ((hdr->flags & SEC_READONLY) == 0)
4808 /* .tbss sections effectively have zero size. */
4809 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
4810 last_size = hdr->size;
4814 phdr_in_segment = FALSE;
4817 /* Create a final PT_LOAD program segment, but not if it's just
4819 if (last_hdr != NULL
4820 && (i - phdr_index != 1
4821 || ((last_hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4822 != SEC_THREAD_LOCAL)))
4824 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4832 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
4835 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
4842 /* For each batch of consecutive loadable .note sections,
4843 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
4844 because if we link together nonloadable .note sections and
4845 loadable .note sections, we will generate two .note sections
4846 in the output file. FIXME: Using names for section types is
4848 for (s = abfd->sections; s != NULL; s = s->next)
4850 if ((s->flags & SEC_LOAD) != 0
4851 && CONST_STRNEQ (s->name, ".note"))
4856 amt = sizeof (struct elf_segment_map);
4857 if (s->alignment_power == 2)
4858 for (s2 = s; s2->next != NULL; s2 = s2->next)
4860 if (s2->next->alignment_power == 2
4861 && (s2->next->flags & SEC_LOAD) != 0
4862 && CONST_STRNEQ (s2->next->name, ".note")
4863 && align_power (s2->lma + s2->size, 2)
4869 amt += (count - 1) * sizeof (asection *);
4870 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4874 m->p_type = PT_NOTE;
4878 m->sections[m->count - count--] = s;
4879 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4882 m->sections[m->count - 1] = s;
4883 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4887 if (s->flags & SEC_THREAD_LOCAL)
4893 if (first_mbind == NULL
4894 && (elf_section_flags (s) & SHF_GNU_MBIND) != 0)
4898 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
4901 amt = sizeof (struct elf_segment_map);
4902 amt += (tls_count - 1) * sizeof (asection *);
4903 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4908 m->count = tls_count;
4909 /* Mandated PF_R. */
4911 m->p_flags_valid = 1;
4913 for (i = 0; i < (unsigned int) tls_count; ++i)
4915 if ((s->flags & SEC_THREAD_LOCAL) == 0)
4918 (_("%B: TLS sections are not adjacent:"), abfd);
4921 while (i < (unsigned int) tls_count)
4923 if ((s->flags & SEC_THREAD_LOCAL) != 0)
4925 _bfd_error_handler (_(" TLS: %A"), s);
4929 _bfd_error_handler (_(" non-TLS: %A"), s);
4932 bfd_set_error (bfd_error_bad_value);
4943 if (first_mbind && (abfd->flags & D_PAGED) != 0)
4944 for (s = first_mbind; s != NULL; s = s->next)
4945 if ((elf_section_flags (s) & SHF_GNU_MBIND) != 0
4946 && (elf_section_data (s)->this_hdr.sh_info
4947 <= PT_GNU_MBIND_NUM))
4949 /* Mandated PF_R. */
4950 unsigned long p_flags = PF_R;
4951 if ((s->flags & SEC_READONLY) == 0)
4953 if ((s->flags & SEC_CODE) != 0)
4956 amt = sizeof (struct elf_segment_map) + sizeof (asection *);
4957 m = bfd_zalloc (abfd, amt);
4961 m->p_type = (PT_GNU_MBIND_LO
4962 + elf_section_data (s)->this_hdr.sh_info);
4964 m->p_flags_valid = 1;
4966 m->p_flags = p_flags;
4972 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
4974 eh_frame_hdr = elf_eh_frame_hdr (abfd);
4975 if (eh_frame_hdr != NULL
4976 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
4978 amt = sizeof (struct elf_segment_map);
4979 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4983 m->p_type = PT_GNU_EH_FRAME;
4985 m->sections[0] = eh_frame_hdr->output_section;
4991 if (elf_stack_flags (abfd))
4993 amt = sizeof (struct elf_segment_map);
4994 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4998 m->p_type = PT_GNU_STACK;
4999 m->p_flags = elf_stack_flags (abfd);
5000 m->p_align = bed->stack_align;
5001 m->p_flags_valid = 1;
5002 m->p_align_valid = m->p_align != 0;
5003 if (info->stacksize > 0)
5005 m->p_size = info->stacksize;
5006 m->p_size_valid = 1;
5013 if (info != NULL && info->relro)
5015 for (m = mfirst; m != NULL; m = m->next)
5017 if (m->p_type == PT_LOAD
5019 && m->sections[0]->vma >= info->relro_start
5020 && m->sections[0]->vma < info->relro_end)
5023 while (--i != (unsigned) -1)
5024 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS))
5025 == (SEC_LOAD | SEC_HAS_CONTENTS))
5028 if (i != (unsigned) -1)
5033 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
5036 amt = sizeof (struct elf_segment_map);
5037 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
5041 m->p_type = PT_GNU_RELRO;
5048 elf_seg_map (abfd) = mfirst;
5051 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
5054 for (count = 0, m = elf_seg_map (abfd); m != NULL; m = m->next)
5056 elf_program_header_size (abfd) = count * bed->s->sizeof_phdr;
5061 if (sections != NULL)
5066 /* Sort sections by address. */
5069 elf_sort_sections (const void *arg1, const void *arg2)
5071 const asection *sec1 = *(const asection **) arg1;
5072 const asection *sec2 = *(const asection **) arg2;
5073 bfd_size_type size1, size2;
5075 /* Sort by LMA first, since this is the address used to
5076 place the section into a segment. */
5077 if (sec1->lma < sec2->lma)
5079 else if (sec1->lma > sec2->lma)
5082 /* Then sort by VMA. Normally the LMA and the VMA will be
5083 the same, and this will do nothing. */
5084 if (sec1->vma < sec2->vma)
5086 else if (sec1->vma > sec2->vma)
5089 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
5091 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
5097 /* If the indicies are the same, do not return 0
5098 here, but continue to try the next comparison. */
5099 if (sec1->target_index - sec2->target_index != 0)
5100 return sec1->target_index - sec2->target_index;
5105 else if (TOEND (sec2))
5110 /* Sort by size, to put zero sized sections
5111 before others at the same address. */
5113 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
5114 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
5121 return sec1->target_index - sec2->target_index;
5124 /* Ian Lance Taylor writes:
5126 We shouldn't be using % with a negative signed number. That's just
5127 not good. We have to make sure either that the number is not
5128 negative, or that the number has an unsigned type. When the types
5129 are all the same size they wind up as unsigned. When file_ptr is a
5130 larger signed type, the arithmetic winds up as signed long long,
5133 What we're trying to say here is something like ``increase OFF by
5134 the least amount that will cause it to be equal to the VMA modulo
5136 /* In other words, something like:
5138 vma_offset = m->sections[0]->vma % bed->maxpagesize;
5139 off_offset = off % bed->maxpagesize;
5140 if (vma_offset < off_offset)
5141 adjustment = vma_offset + bed->maxpagesize - off_offset;
5143 adjustment = vma_offset - off_offset;
5145 which can be collapsed into the expression below. */
5148 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
5150 /* PR binutils/16199: Handle an alignment of zero. */
5151 if (maxpagesize == 0)
5153 return ((vma - off) % maxpagesize);
5157 print_segment_map (const struct elf_segment_map *m)
5160 const char *pt = get_segment_type (m->p_type);
5165 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
5166 sprintf (buf, "LOPROC+%7.7x",
5167 (unsigned int) (m->p_type - PT_LOPROC));
5168 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
5169 sprintf (buf, "LOOS+%7.7x",
5170 (unsigned int) (m->p_type - PT_LOOS));
5172 snprintf (buf, sizeof (buf), "%8.8x",
5173 (unsigned int) m->p_type);
5177 fprintf (stderr, "%s:", pt);
5178 for (j = 0; j < m->count; j++)
5179 fprintf (stderr, " %s", m->sections [j]->name);
5185 write_zeros (bfd *abfd, file_ptr pos, bfd_size_type len)
5190 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
5192 buf = bfd_zmalloc (len);
5195 ret = bfd_bwrite (buf, len, abfd) == len;
5200 /* Assign file positions to the sections based on the mapping from
5201 sections to segments. This function also sets up some fields in
5205 assign_file_positions_for_load_sections (bfd *abfd,
5206 struct bfd_link_info *link_info)
5208 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5209 struct elf_segment_map *m;
5210 Elf_Internal_Phdr *phdrs;
5211 Elf_Internal_Phdr *p;
5213 bfd_size_type maxpagesize;
5214 unsigned int pt_load_count = 0;
5217 bfd_vma header_pad = 0;
5219 if (link_info == NULL
5220 && !_bfd_elf_map_sections_to_segments (abfd, link_info))
5224 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
5228 header_pad = m->header_size;
5233 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
5234 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
5238 /* PR binutils/12467. */
5239 elf_elfheader (abfd)->e_phoff = 0;
5240 elf_elfheader (abfd)->e_phentsize = 0;
5243 elf_elfheader (abfd)->e_phnum = alloc;
5245 if (elf_program_header_size (abfd) == (bfd_size_type) -1)
5246 elf_program_header_size (abfd) = alloc * bed->s->sizeof_phdr;
5248 BFD_ASSERT (elf_program_header_size (abfd)
5249 >= alloc * bed->s->sizeof_phdr);
5253 elf_next_file_pos (abfd) = bed->s->sizeof_ehdr;
5257 /* We're writing the size in elf_program_header_size (abfd),
5258 see assign_file_positions_except_relocs, so make sure we have
5259 that amount allocated, with trailing space cleared.
5260 The variable alloc contains the computed need, while
5261 elf_program_header_size (abfd) contains the size used for the
5263 See ld/emultempl/elf-generic.em:gld${EMULATION_NAME}_map_segments
5264 where the layout is forced to according to a larger size in the
5265 last iterations for the testcase ld-elf/header. */
5266 BFD_ASSERT (elf_program_header_size (abfd) % bed->s->sizeof_phdr
5268 phdrs = (Elf_Internal_Phdr *)
5270 (elf_program_header_size (abfd) / bed->s->sizeof_phdr),
5271 sizeof (Elf_Internal_Phdr));
5272 elf_tdata (abfd)->phdr = phdrs;
5277 if ((abfd->flags & D_PAGED) != 0)
5278 maxpagesize = bed->maxpagesize;
5280 off = bed->s->sizeof_ehdr;
5281 off += alloc * bed->s->sizeof_phdr;
5282 if (header_pad < (bfd_vma) off)
5288 for (m = elf_seg_map (abfd), p = phdrs, j = 0;
5290 m = m->next, p++, j++)
5294 bfd_boolean no_contents;
5296 /* If elf_segment_map is not from map_sections_to_segments, the
5297 sections may not be correctly ordered. NOTE: sorting should
5298 not be done to the PT_NOTE section of a corefile, which may
5299 contain several pseudo-sections artificially created by bfd.
5300 Sorting these pseudo-sections breaks things badly. */
5302 && !(elf_elfheader (abfd)->e_type == ET_CORE
5303 && m->p_type == PT_NOTE))
5304 qsort (m->sections, (size_t) m->count, sizeof (asection *),
5307 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
5308 number of sections with contents contributing to both p_filesz
5309 and p_memsz, followed by a number of sections with no contents
5310 that just contribute to p_memsz. In this loop, OFF tracks next
5311 available file offset for PT_LOAD and PT_NOTE segments. */
5312 p->p_type = m->p_type;
5313 p->p_flags = m->p_flags;
5318 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
5320 if (m->p_paddr_valid)
5321 p->p_paddr = m->p_paddr;
5322 else if (m->count == 0)
5325 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
5327 if (p->p_type == PT_LOAD
5328 && (abfd->flags & D_PAGED) != 0)
5330 /* p_align in demand paged PT_LOAD segments effectively stores
5331 the maximum page size. When copying an executable with
5332 objcopy, we set m->p_align from the input file. Use this
5333 value for maxpagesize rather than bed->maxpagesize, which
5334 may be different. Note that we use maxpagesize for PT_TLS
5335 segment alignment later in this function, so we are relying
5336 on at least one PT_LOAD segment appearing before a PT_TLS
5338 if (m->p_align_valid)
5339 maxpagesize = m->p_align;
5341 p->p_align = maxpagesize;
5344 else if (m->p_align_valid)
5345 p->p_align = m->p_align;
5346 else if (m->count == 0)
5347 p->p_align = 1 << bed->s->log_file_align;
5351 no_contents = FALSE;
5353 if (p->p_type == PT_LOAD
5356 bfd_size_type align;
5357 unsigned int align_power = 0;
5359 if (m->p_align_valid)
5363 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
5365 unsigned int secalign;
5367 secalign = bfd_get_section_alignment (abfd, *secpp);
5368 if (secalign > align_power)
5369 align_power = secalign;
5371 align = (bfd_size_type) 1 << align_power;
5372 if (align < maxpagesize)
5373 align = maxpagesize;
5376 for (i = 0; i < m->count; i++)
5377 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
5378 /* If we aren't making room for this section, then
5379 it must be SHT_NOBITS regardless of what we've
5380 set via struct bfd_elf_special_section. */
5381 elf_section_type (m->sections[i]) = SHT_NOBITS;
5383 /* Find out whether this segment contains any loadable
5386 for (i = 0; i < m->count; i++)
5387 if (elf_section_type (m->sections[i]) != SHT_NOBITS)
5389 no_contents = FALSE;
5393 off_adjust = vma_page_aligned_bias (p->p_vaddr, off, align);
5395 /* Broken hardware and/or kernel require that files do not
5396 map the same page with different permissions on some hppa
5398 if (pt_load_count > 1
5399 && bed->no_page_alias
5400 && (off & (maxpagesize - 1)) != 0
5401 && (off & -maxpagesize) == ((off + off_adjust) & -maxpagesize))
5402 off_adjust += maxpagesize;
5406 /* We shouldn't need to align the segment on disk since
5407 the segment doesn't need file space, but the gABI
5408 arguably requires the alignment and glibc ld.so
5409 checks it. So to comply with the alignment
5410 requirement but not waste file space, we adjust
5411 p_offset for just this segment. (OFF_ADJUST is
5412 subtracted from OFF later.) This may put p_offset
5413 past the end of file, but that shouldn't matter. */
5418 /* Make sure the .dynamic section is the first section in the
5419 PT_DYNAMIC segment. */
5420 else if (p->p_type == PT_DYNAMIC
5422 && strcmp (m->sections[0]->name, ".dynamic") != 0)
5425 (_("%B: The first section in the PT_DYNAMIC segment"
5426 " is not the .dynamic section"),
5428 bfd_set_error (bfd_error_bad_value);
5431 /* Set the note section type to SHT_NOTE. */
5432 else if (p->p_type == PT_NOTE)
5433 for (i = 0; i < m->count; i++)
5434 elf_section_type (m->sections[i]) = SHT_NOTE;
5440 if (m->includes_filehdr)
5442 if (!m->p_flags_valid)
5444 p->p_filesz = bed->s->sizeof_ehdr;
5445 p->p_memsz = bed->s->sizeof_ehdr;
5448 if (p->p_vaddr < (bfd_vma) off
5449 || (!m->p_paddr_valid
5450 && p->p_paddr < (bfd_vma) off))
5453 (_("%B: Not enough room for program headers,"
5454 " try linking with -N"),
5456 bfd_set_error (bfd_error_bad_value);
5461 if (!m->p_paddr_valid)
5466 if (m->includes_phdrs)
5468 if (!m->p_flags_valid)
5471 if (!m->includes_filehdr)
5473 p->p_offset = bed->s->sizeof_ehdr;
5477 p->p_vaddr -= off - p->p_offset;
5478 if (!m->p_paddr_valid)
5479 p->p_paddr -= off - p->p_offset;
5483 p->p_filesz += alloc * bed->s->sizeof_phdr;
5484 p->p_memsz += alloc * bed->s->sizeof_phdr;
5487 p->p_filesz += header_pad;
5488 p->p_memsz += header_pad;
5492 if (p->p_type == PT_LOAD
5493 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
5495 if (!m->includes_filehdr && !m->includes_phdrs)
5501 adjust = off - (p->p_offset + p->p_filesz);
5503 p->p_filesz += adjust;
5504 p->p_memsz += adjust;
5508 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
5509 maps. Set filepos for sections in PT_LOAD segments, and in
5510 core files, for sections in PT_NOTE segments.
5511 assign_file_positions_for_non_load_sections will set filepos
5512 for other sections and update p_filesz for other segments. */
5513 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
5516 bfd_size_type align;
5517 Elf_Internal_Shdr *this_hdr;
5520 this_hdr = &elf_section_data (sec)->this_hdr;
5521 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
5523 if ((p->p_type == PT_LOAD
5524 || p->p_type == PT_TLS)
5525 && (this_hdr->sh_type != SHT_NOBITS
5526 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
5527 && ((this_hdr->sh_flags & SHF_TLS) == 0
5528 || p->p_type == PT_TLS))))
5530 bfd_vma p_start = p->p_paddr;
5531 bfd_vma p_end = p_start + p->p_memsz;
5532 bfd_vma s_start = sec->lma;
5533 bfd_vma adjust = s_start - p_end;
5537 || p_end < p_start))
5540 /* xgettext:c-format */
5541 (_("%B: section %A lma %#Lx adjusted to %#Lx"),
5542 abfd, sec, s_start, p_end);
5546 p->p_memsz += adjust;
5548 if (this_hdr->sh_type != SHT_NOBITS)
5550 if (p->p_filesz + adjust < p->p_memsz)
5552 /* We have a PROGBITS section following NOBITS ones.
5553 Allocate file space for the NOBITS section(s) and
5555 adjust = p->p_memsz - p->p_filesz;
5556 if (!write_zeros (abfd, off, adjust))
5560 p->p_filesz += adjust;
5564 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
5566 /* The section at i == 0 is the one that actually contains
5570 this_hdr->sh_offset = sec->filepos = off;
5571 off += this_hdr->sh_size;
5572 p->p_filesz = this_hdr->sh_size;
5578 /* The rest are fake sections that shouldn't be written. */
5587 if (p->p_type == PT_LOAD)
5589 this_hdr->sh_offset = sec->filepos = off;
5590 if (this_hdr->sh_type != SHT_NOBITS)
5591 off += this_hdr->sh_size;
5593 else if (this_hdr->sh_type == SHT_NOBITS
5594 && (this_hdr->sh_flags & SHF_TLS) != 0
5595 && this_hdr->sh_offset == 0)
5597 /* This is a .tbss section that didn't get a PT_LOAD.
5598 (See _bfd_elf_map_sections_to_segments "Create a
5599 final PT_LOAD".) Set sh_offset to the value it
5600 would have if we had created a zero p_filesz and
5601 p_memsz PT_LOAD header for the section. This
5602 also makes the PT_TLS header have the same
5604 bfd_vma adjust = vma_page_aligned_bias (this_hdr->sh_addr,
5606 this_hdr->sh_offset = sec->filepos = off + adjust;
5609 if (this_hdr->sh_type != SHT_NOBITS)
5611 p->p_filesz += this_hdr->sh_size;
5612 /* A load section without SHF_ALLOC is something like
5613 a note section in a PT_NOTE segment. These take
5614 file space but are not loaded into memory. */
5615 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
5616 p->p_memsz += this_hdr->sh_size;
5618 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
5620 if (p->p_type == PT_TLS)
5621 p->p_memsz += this_hdr->sh_size;
5623 /* .tbss is special. It doesn't contribute to p_memsz of
5625 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
5626 p->p_memsz += this_hdr->sh_size;
5629 if (align > p->p_align
5630 && !m->p_align_valid
5631 && (p->p_type != PT_LOAD
5632 || (abfd->flags & D_PAGED) == 0))
5636 if (!m->p_flags_valid)
5639 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
5641 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
5648 /* Check that all sections are in a PT_LOAD segment.
5649 Don't check funky gdb generated core files. */
5650 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
5652 bfd_boolean check_vma = TRUE;
5654 for (i = 1; i < m->count; i++)
5655 if (m->sections[i]->vma == m->sections[i - 1]->vma
5656 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i])
5657 ->this_hdr), p) != 0
5658 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i - 1])
5659 ->this_hdr), p) != 0)
5661 /* Looks like we have overlays packed into the segment. */
5666 for (i = 0; i < m->count; i++)
5668 Elf_Internal_Shdr *this_hdr;
5671 sec = m->sections[i];
5672 this_hdr = &(elf_section_data(sec)->this_hdr);
5673 if (!ELF_SECTION_IN_SEGMENT_1 (this_hdr, p, check_vma, 0)
5674 && !ELF_TBSS_SPECIAL (this_hdr, p))
5677 /* xgettext:c-format */
5678 (_("%B: section `%A' can't be allocated in segment %d"),
5680 print_segment_map (m);
5686 elf_next_file_pos (abfd) = off;
5690 /* Assign file positions for the other sections. */
5693 assign_file_positions_for_non_load_sections (bfd *abfd,
5694 struct bfd_link_info *link_info)
5696 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5697 Elf_Internal_Shdr **i_shdrpp;
5698 Elf_Internal_Shdr **hdrpp, **end_hdrpp;
5699 Elf_Internal_Phdr *phdrs;
5700 Elf_Internal_Phdr *p;
5701 struct elf_segment_map *m;
5702 struct elf_segment_map *hdrs_segment;
5703 bfd_vma filehdr_vaddr, filehdr_paddr;
5704 bfd_vma phdrs_vaddr, phdrs_paddr;
5708 i_shdrpp = elf_elfsections (abfd);
5709 end_hdrpp = i_shdrpp + elf_numsections (abfd);
5710 off = elf_next_file_pos (abfd);
5711 for (hdrpp = i_shdrpp + 1; hdrpp < end_hdrpp; hdrpp++)
5713 Elf_Internal_Shdr *hdr;
5716 if (hdr->bfd_section != NULL
5717 && (hdr->bfd_section->filepos != 0
5718 || (hdr->sh_type == SHT_NOBITS
5719 && hdr->contents == NULL)))
5720 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
5721 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
5723 if (hdr->sh_size != 0)
5725 /* xgettext:c-format */
5726 (_("%B: warning: allocated section `%s' not in segment"),
5728 (hdr->bfd_section == NULL
5730 : hdr->bfd_section->name));
5731 /* We don't need to page align empty sections. */
5732 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
5733 off += vma_page_aligned_bias (hdr->sh_addr, off,
5736 off += vma_page_aligned_bias (hdr->sh_addr, off,
5738 off = _bfd_elf_assign_file_position_for_section (hdr, off,
5741 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
5742 && hdr->bfd_section == NULL)
5743 || (hdr->bfd_section != NULL
5744 && (hdr->bfd_section->flags & SEC_ELF_COMPRESS))
5745 /* Compress DWARF debug sections. */
5746 || hdr == i_shdrpp[elf_onesymtab (abfd)]
5747 || (elf_symtab_shndx_list (abfd) != NULL
5748 && hdr == i_shdrpp[elf_symtab_shndx_list (abfd)->ndx])
5749 || hdr == i_shdrpp[elf_strtab_sec (abfd)]
5750 || hdr == i_shdrpp[elf_shstrtab_sec (abfd)])
5751 hdr->sh_offset = -1;
5753 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
5756 /* Now that we have set the section file positions, we can set up
5757 the file positions for the non PT_LOAD segments. */
5761 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
5763 hdrs_segment = NULL;
5764 phdrs = elf_tdata (abfd)->phdr;
5765 for (m = elf_seg_map (abfd), p = phdrs; m != NULL; m = m->next, p++)
5768 if (p->p_type != PT_LOAD)
5771 if (m->includes_filehdr)
5773 filehdr_vaddr = p->p_vaddr;
5774 filehdr_paddr = p->p_paddr;
5776 if (m->includes_phdrs)
5778 phdrs_vaddr = p->p_vaddr;
5779 phdrs_paddr = p->p_paddr;
5780 if (m->includes_filehdr)
5783 phdrs_vaddr += bed->s->sizeof_ehdr;
5784 phdrs_paddr += bed->s->sizeof_ehdr;
5789 if (hdrs_segment != NULL && link_info != NULL)
5791 /* There is a segment that contains both the file headers and the
5792 program headers, so provide a symbol __ehdr_start pointing there.
5793 A program can use this to examine itself robustly. */
5795 struct elf_link_hash_entry *hash
5796 = elf_link_hash_lookup (elf_hash_table (link_info), "__ehdr_start",
5797 FALSE, FALSE, TRUE);
5798 /* If the symbol was referenced and not defined, define it. */
5800 && (hash->root.type == bfd_link_hash_new
5801 || hash->root.type == bfd_link_hash_undefined
5802 || hash->root.type == bfd_link_hash_undefweak
5803 || hash->root.type == bfd_link_hash_common))
5806 if (hdrs_segment->count != 0)
5807 /* The segment contains sections, so use the first one. */
5808 s = hdrs_segment->sections[0];
5810 /* Use the first (i.e. lowest-addressed) section in any segment. */
5811 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
5820 hash->root.u.def.value = filehdr_vaddr - s->vma;
5821 hash->root.u.def.section = s;
5825 hash->root.u.def.value = filehdr_vaddr;
5826 hash->root.u.def.section = bfd_abs_section_ptr;
5829 hash->root.type = bfd_link_hash_defined;
5830 hash->def_regular = 1;
5835 for (m = elf_seg_map (abfd), p = phdrs; m != NULL; m = m->next, p++)
5837 if (p->p_type == PT_GNU_RELRO)
5839 const Elf_Internal_Phdr *lp;
5840 struct elf_segment_map *lm;
5842 if (link_info != NULL)
5844 /* During linking the range of the RELRO segment is passed
5846 for (lm = elf_seg_map (abfd), lp = phdrs;
5848 lm = lm->next, lp++)
5850 if (lp->p_type == PT_LOAD
5851 && lp->p_vaddr < link_info->relro_end
5853 && lm->sections[0]->vma >= link_info->relro_start)
5857 BFD_ASSERT (lm != NULL);
5861 /* Otherwise we are copying an executable or shared
5862 library, but we need to use the same linker logic. */
5863 for (lp = phdrs; lp < phdrs + count; ++lp)
5865 if (lp->p_type == PT_LOAD
5866 && lp->p_paddr == p->p_paddr)
5871 if (lp < phdrs + count)
5873 p->p_vaddr = lp->p_vaddr;
5874 p->p_paddr = lp->p_paddr;
5875 p->p_offset = lp->p_offset;
5876 if (link_info != NULL)
5877 p->p_filesz = link_info->relro_end - lp->p_vaddr;
5878 else if (m->p_size_valid)
5879 p->p_filesz = m->p_size;
5882 p->p_memsz = p->p_filesz;
5883 /* Preserve the alignment and flags if they are valid. The
5884 gold linker generates RW/4 for the PT_GNU_RELRO section.
5885 It is better for objcopy/strip to honor these attributes
5886 otherwise gdb will choke when using separate debug files.
5888 if (!m->p_align_valid)
5890 if (!m->p_flags_valid)
5895 memset (p, 0, sizeof *p);
5896 p->p_type = PT_NULL;
5899 else if (p->p_type == PT_GNU_STACK)
5901 if (m->p_size_valid)
5902 p->p_memsz = m->p_size;
5904 else if (m->count != 0)
5908 if (p->p_type != PT_LOAD
5909 && (p->p_type != PT_NOTE
5910 || bfd_get_format (abfd) != bfd_core))
5912 /* A user specified segment layout may include a PHDR
5913 segment that overlaps with a LOAD segment... */
5914 if (p->p_type == PT_PHDR)
5920 if (m->includes_filehdr || m->includes_phdrs)
5922 /* PR 17512: file: 2195325e. */
5924 (_("%B: error: non-load segment %d includes file header "
5925 "and/or program header"),
5926 abfd, (int) (p - phdrs));
5931 p->p_offset = m->sections[0]->filepos;
5932 for (i = m->count; i-- != 0;)
5934 asection *sect = m->sections[i];
5935 Elf_Internal_Shdr *hdr = &elf_section_data (sect)->this_hdr;
5936 if (hdr->sh_type != SHT_NOBITS)
5938 p->p_filesz = (sect->filepos - m->sections[0]->filepos
5945 else if (m->includes_filehdr)
5947 p->p_vaddr = filehdr_vaddr;
5948 if (! m->p_paddr_valid)
5949 p->p_paddr = filehdr_paddr;
5951 else if (m->includes_phdrs)
5953 p->p_vaddr = phdrs_vaddr;
5954 if (! m->p_paddr_valid)
5955 p->p_paddr = phdrs_paddr;
5959 elf_next_file_pos (abfd) = off;
5964 static elf_section_list *
5965 find_section_in_list (unsigned int i, elf_section_list * list)
5967 for (;list != NULL; list = list->next)
5973 /* Work out the file positions of all the sections. This is called by
5974 _bfd_elf_compute_section_file_positions. All the section sizes and
5975 VMAs must be known before this is called.
5977 Reloc sections come in two flavours: Those processed specially as
5978 "side-channel" data attached to a section to which they apply, and
5979 those that bfd doesn't process as relocations. The latter sort are
5980 stored in a normal bfd section by bfd_section_from_shdr. We don't
5981 consider the former sort here, unless they form part of the loadable
5982 image. Reloc sections not assigned here will be handled later by
5983 assign_file_positions_for_relocs.
5985 We also don't set the positions of the .symtab and .strtab here. */
5988 assign_file_positions_except_relocs (bfd *abfd,
5989 struct bfd_link_info *link_info)
5991 struct elf_obj_tdata *tdata = elf_tdata (abfd);
5992 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5993 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5995 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
5996 && bfd_get_format (abfd) != bfd_core)
5998 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
5999 unsigned int num_sec = elf_numsections (abfd);
6000 Elf_Internal_Shdr **hdrpp;
6004 /* Start after the ELF header. */
6005 off = i_ehdrp->e_ehsize;
6007 /* We are not creating an executable, which means that we are
6008 not creating a program header, and that the actual order of
6009 the sections in the file is unimportant. */
6010 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
6012 Elf_Internal_Shdr *hdr;
6015 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
6016 && hdr->bfd_section == NULL)
6017 || (hdr->bfd_section != NULL
6018 && (hdr->bfd_section->flags & SEC_ELF_COMPRESS))
6019 /* Compress DWARF debug sections. */
6020 || i == elf_onesymtab (abfd)
6021 || (elf_symtab_shndx_list (abfd) != NULL
6022 && hdr == i_shdrpp[elf_symtab_shndx_list (abfd)->ndx])
6023 || i == elf_strtab_sec (abfd)
6024 || i == elf_shstrtab_sec (abfd))
6026 hdr->sh_offset = -1;
6029 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
6032 elf_next_file_pos (abfd) = off;
6038 /* Assign file positions for the loaded sections based on the
6039 assignment of sections to segments. */
6040 if (!assign_file_positions_for_load_sections (abfd, link_info))
6043 /* And for non-load sections. */
6044 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
6047 if (bed->elf_backend_modify_program_headers != NULL)
6049 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
6053 /* Set e_type in ELF header to ET_EXEC for -pie -Ttext-segment=. */
6054 if (link_info != NULL && bfd_link_pie (link_info))
6056 unsigned int num_segments = elf_elfheader (abfd)->e_phnum;
6057 Elf_Internal_Phdr *segment = elf_tdata (abfd)->phdr;
6058 Elf_Internal_Phdr *end_segment = &segment[num_segments];
6060 /* Find the lowest p_vaddr in PT_LOAD segments. */
6061 bfd_vma p_vaddr = (bfd_vma) -1;
6062 for (; segment < end_segment; segment++)
6063 if (segment->p_type == PT_LOAD && p_vaddr > segment->p_vaddr)
6064 p_vaddr = segment->p_vaddr;
6066 /* Set e_type to ET_EXEC if the lowest p_vaddr in PT_LOAD
6067 segments is non-zero. */
6069 i_ehdrp->e_type = ET_EXEC;
6072 /* Write out the program headers. */
6073 alloc = elf_program_header_size (abfd) / bed->s->sizeof_phdr;
6075 /* Sort the program headers into the ordering required by the ELF standard. */
6079 /* PR ld/20815 - Check that the program header segment, if present, will
6080 be loaded into memory. FIXME: The check below is not sufficient as
6081 really all PT_LOAD segments should be checked before issuing an error
6082 message. Plus the PHDR segment does not have to be the first segment
6083 in the program header table. But this version of the check should
6084 catch all real world use cases.
6086 FIXME: We used to have code here to sort the PT_LOAD segments into
6087 ascending order, as per the ELF spec. But this breaks some programs,
6088 including the Linux kernel. But really either the spec should be
6089 changed or the programs updated. */
6091 && tdata->phdr[0].p_type == PT_PHDR
6092 && ! bed->elf_backend_allow_non_load_phdr (abfd, tdata->phdr, alloc)
6093 && tdata->phdr[1].p_type == PT_LOAD
6094 && (tdata->phdr[1].p_vaddr > tdata->phdr[0].p_vaddr
6095 || (tdata->phdr[1].p_vaddr + tdata->phdr[1].p_memsz)
6096 < (tdata->phdr[0].p_vaddr + tdata->phdr[0].p_memsz)))
6098 /* The fix for this error is usually to edit the linker script being
6099 used and set up the program headers manually. Either that or
6100 leave room for the headers at the start of the SECTIONS. */
6101 _bfd_error_handler (_("\
6102 %B: error: PHDR segment not covered by LOAD segment"),
6107 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
6108 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
6116 prep_headers (bfd *abfd)
6118 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form. */
6119 struct elf_strtab_hash *shstrtab;
6120 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6122 i_ehdrp = elf_elfheader (abfd);
6124 shstrtab = _bfd_elf_strtab_init ();
6125 if (shstrtab == NULL)
6128 elf_shstrtab (abfd) = shstrtab;
6130 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
6131 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
6132 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
6133 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
6135 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
6136 i_ehdrp->e_ident[EI_DATA] =
6137 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
6138 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
6140 if ((abfd->flags & DYNAMIC) != 0)
6141 i_ehdrp->e_type = ET_DYN;
6142 else if ((abfd->flags & EXEC_P) != 0)
6143 i_ehdrp->e_type = ET_EXEC;
6144 else if (bfd_get_format (abfd) == bfd_core)
6145 i_ehdrp->e_type = ET_CORE;
6147 i_ehdrp->e_type = ET_REL;
6149 switch (bfd_get_arch (abfd))
6151 case bfd_arch_unknown:
6152 i_ehdrp->e_machine = EM_NONE;
6155 /* There used to be a long list of cases here, each one setting
6156 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
6157 in the corresponding bfd definition. To avoid duplication,
6158 the switch was removed. Machines that need special handling
6159 can generally do it in elf_backend_final_write_processing(),
6160 unless they need the information earlier than the final write.
6161 Such need can generally be supplied by replacing the tests for
6162 e_machine with the conditions used to determine it. */
6164 i_ehdrp->e_machine = bed->elf_machine_code;
6167 i_ehdrp->e_version = bed->s->ev_current;
6168 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
6170 /* No program header, for now. */
6171 i_ehdrp->e_phoff = 0;
6172 i_ehdrp->e_phentsize = 0;
6173 i_ehdrp->e_phnum = 0;
6175 /* Each bfd section is section header entry. */
6176 i_ehdrp->e_entry = bfd_get_start_address (abfd);
6177 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
6179 /* If we're building an executable, we'll need a program header table. */
6180 if (abfd->flags & EXEC_P)
6181 /* It all happens later. */
6185 i_ehdrp->e_phentsize = 0;
6186 i_ehdrp->e_phoff = 0;
6189 elf_tdata (abfd)->symtab_hdr.sh_name =
6190 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
6191 elf_tdata (abfd)->strtab_hdr.sh_name =
6192 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
6193 elf_tdata (abfd)->shstrtab_hdr.sh_name =
6194 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
6195 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
6196 || elf_tdata (abfd)->strtab_hdr.sh_name == (unsigned int) -1
6197 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
6203 /* Assign file positions for all the reloc sections which are not part
6204 of the loadable file image, and the file position of section headers. */
6207 _bfd_elf_assign_file_positions_for_non_load (bfd *abfd)
6210 Elf_Internal_Shdr **shdrpp, **end_shdrpp;
6211 Elf_Internal_Shdr *shdrp;
6212 Elf_Internal_Ehdr *i_ehdrp;
6213 const struct elf_backend_data *bed;
6215 off = elf_next_file_pos (abfd);
6217 shdrpp = elf_elfsections (abfd);
6218 end_shdrpp = shdrpp + elf_numsections (abfd);
6219 for (shdrpp++; shdrpp < end_shdrpp; shdrpp++)
6222 if (shdrp->sh_offset == -1)
6224 asection *sec = shdrp->bfd_section;
6225 bfd_boolean is_rel = (shdrp->sh_type == SHT_REL
6226 || shdrp->sh_type == SHT_RELA);
6228 || (sec != NULL && (sec->flags & SEC_ELF_COMPRESS)))
6232 const char *name = sec->name;
6233 struct bfd_elf_section_data *d;
6235 /* Compress DWARF debug sections. */
6236 if (!bfd_compress_section (abfd, sec,
6240 if (sec->compress_status == COMPRESS_SECTION_DONE
6241 && (abfd->flags & BFD_COMPRESS_GABI) == 0)
6243 /* If section is compressed with zlib-gnu, convert
6244 section name from .debug_* to .zdebug_*. */
6246 = convert_debug_to_zdebug (abfd, name);
6247 if (new_name == NULL)
6251 /* Add section name to section name section. */
6252 if (shdrp->sh_name != (unsigned int) -1)
6255 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
6257 d = elf_section_data (sec);
6259 /* Add reloc section name to section name section. */
6261 && !_bfd_elf_set_reloc_sh_name (abfd,
6266 && !_bfd_elf_set_reloc_sh_name (abfd,
6271 /* Update section size and contents. */
6272 shdrp->sh_size = sec->size;
6273 shdrp->contents = sec->contents;
6274 shdrp->bfd_section->contents = NULL;
6276 off = _bfd_elf_assign_file_position_for_section (shdrp,
6283 /* Place section name section after DWARF debug sections have been
6285 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
6286 shdrp = &elf_tdata (abfd)->shstrtab_hdr;
6287 shdrp->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
6288 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
6290 /* Place the section headers. */
6291 i_ehdrp = elf_elfheader (abfd);
6292 bed = get_elf_backend_data (abfd);
6293 off = align_file_position (off, 1 << bed->s->log_file_align);
6294 i_ehdrp->e_shoff = off;
6295 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
6296 elf_next_file_pos (abfd) = off;
6302 _bfd_elf_write_object_contents (bfd *abfd)
6304 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6305 Elf_Internal_Shdr **i_shdrp;
6307 unsigned int count, num_sec;
6308 struct elf_obj_tdata *t;
6310 if (! abfd->output_has_begun
6311 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6314 i_shdrp = elf_elfsections (abfd);
6317 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
6321 if (!_bfd_elf_assign_file_positions_for_non_load (abfd))
6324 /* After writing the headers, we need to write the sections too... */
6325 num_sec = elf_numsections (abfd);
6326 for (count = 1; count < num_sec; count++)
6328 i_shdrp[count]->sh_name
6329 = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
6330 i_shdrp[count]->sh_name);
6331 if (bed->elf_backend_section_processing)
6332 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
6333 if (i_shdrp[count]->contents)
6335 bfd_size_type amt = i_shdrp[count]->sh_size;
6337 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
6338 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
6343 /* Write out the section header names. */
6344 t = elf_tdata (abfd);
6345 if (elf_shstrtab (abfd) != NULL
6346 && (bfd_seek (abfd, t->shstrtab_hdr.sh_offset, SEEK_SET) != 0
6347 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
6350 if (bed->elf_backend_final_write_processing)
6351 (*bed->elf_backend_final_write_processing) (abfd, elf_linker (abfd));
6353 if (!bed->s->write_shdrs_and_ehdr (abfd))
6356 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
6357 if (t->o->build_id.after_write_object_contents != NULL)
6358 return (*t->o->build_id.after_write_object_contents) (abfd);
6364 _bfd_elf_write_corefile_contents (bfd *abfd)
6366 /* Hopefully this can be done just like an object file. */
6367 return _bfd_elf_write_object_contents (abfd);
6370 /* Given a section, search the header to find them. */
6373 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
6375 const struct elf_backend_data *bed;
6376 unsigned int sec_index;
6378 if (elf_section_data (asect) != NULL
6379 && elf_section_data (asect)->this_idx != 0)
6380 return elf_section_data (asect)->this_idx;
6382 if (bfd_is_abs_section (asect))
6383 sec_index = SHN_ABS;
6384 else if (bfd_is_com_section (asect))
6385 sec_index = SHN_COMMON;
6386 else if (bfd_is_und_section (asect))
6387 sec_index = SHN_UNDEF;
6389 sec_index = SHN_BAD;
6391 bed = get_elf_backend_data (abfd);
6392 if (bed->elf_backend_section_from_bfd_section)
6394 int retval = sec_index;
6396 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
6400 if (sec_index == SHN_BAD)
6401 bfd_set_error (bfd_error_nonrepresentable_section);
6406 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
6410 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
6412 asymbol *asym_ptr = *asym_ptr_ptr;
6414 flagword flags = asym_ptr->flags;
6416 /* When gas creates relocations against local labels, it creates its
6417 own symbol for the section, but does put the symbol into the
6418 symbol chain, so udata is 0. When the linker is generating
6419 relocatable output, this section symbol may be for one of the
6420 input sections rather than the output section. */
6421 if (asym_ptr->udata.i == 0
6422 && (flags & BSF_SECTION_SYM)
6423 && asym_ptr->section)
6428 sec = asym_ptr->section;
6429 if (sec->owner != abfd && sec->output_section != NULL)
6430 sec = sec->output_section;
6431 if (sec->owner == abfd
6432 && (indx = sec->index) < elf_num_section_syms (abfd)
6433 && elf_section_syms (abfd)[indx] != NULL)
6434 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
6437 idx = asym_ptr->udata.i;
6441 /* This case can occur when using --strip-symbol on a symbol
6442 which is used in a relocation entry. */
6444 /* xgettext:c-format */
6445 (_("%B: symbol `%s' required but not present"),
6446 abfd, bfd_asymbol_name (asym_ptr));
6447 bfd_set_error (bfd_error_no_symbols);
6454 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8x\n",
6455 (long) asym_ptr, asym_ptr->name, idx, flags);
6463 /* Rewrite program header information. */
6466 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
6468 Elf_Internal_Ehdr *iehdr;
6469 struct elf_segment_map *map;
6470 struct elf_segment_map *map_first;
6471 struct elf_segment_map **pointer_to_map;
6472 Elf_Internal_Phdr *segment;
6475 unsigned int num_segments;
6476 bfd_boolean phdr_included = FALSE;
6477 bfd_boolean p_paddr_valid;
6478 bfd_vma maxpagesize;
6479 struct elf_segment_map *phdr_adjust_seg = NULL;
6480 unsigned int phdr_adjust_num = 0;
6481 const struct elf_backend_data *bed;
6483 bed = get_elf_backend_data (ibfd);
6484 iehdr = elf_elfheader (ibfd);
6487 pointer_to_map = &map_first;
6489 num_segments = elf_elfheader (ibfd)->e_phnum;
6490 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
6492 /* Returns the end address of the segment + 1. */
6493 #define SEGMENT_END(segment, start) \
6494 (start + (segment->p_memsz > segment->p_filesz \
6495 ? segment->p_memsz : segment->p_filesz))
6497 #define SECTION_SIZE(section, segment) \
6498 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
6499 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
6500 ? section->size : 0)
6502 /* Returns TRUE if the given section is contained within
6503 the given segment. VMA addresses are compared. */
6504 #define IS_CONTAINED_BY_VMA(section, segment) \
6505 (section->vma >= segment->p_vaddr \
6506 && (section->vma + SECTION_SIZE (section, segment) \
6507 <= (SEGMENT_END (segment, segment->p_vaddr))))
6509 /* Returns TRUE if the given section is contained within
6510 the given segment. LMA addresses are compared. */
6511 #define IS_CONTAINED_BY_LMA(section, segment, base) \
6512 (section->lma >= base \
6513 && (section->lma + SECTION_SIZE (section, segment) \
6514 <= SEGMENT_END (segment, base)))
6516 /* Handle PT_NOTE segment. */
6517 #define IS_NOTE(p, s) \
6518 (p->p_type == PT_NOTE \
6519 && elf_section_type (s) == SHT_NOTE \
6520 && (bfd_vma) s->filepos >= p->p_offset \
6521 && ((bfd_vma) s->filepos + s->size \
6522 <= p->p_offset + p->p_filesz))
6524 /* Special case: corefile "NOTE" section containing regs, prpsinfo
6526 #define IS_COREFILE_NOTE(p, s) \
6528 && bfd_get_format (ibfd) == bfd_core \
6532 /* The complicated case when p_vaddr is 0 is to handle the Solaris
6533 linker, which generates a PT_INTERP section with p_vaddr and
6534 p_memsz set to 0. */
6535 #define IS_SOLARIS_PT_INTERP(p, s) \
6537 && p->p_paddr == 0 \
6538 && p->p_memsz == 0 \
6539 && p->p_filesz > 0 \
6540 && (s->flags & SEC_HAS_CONTENTS) != 0 \
6542 && (bfd_vma) s->filepos >= p->p_offset \
6543 && ((bfd_vma) s->filepos + s->size \
6544 <= p->p_offset + p->p_filesz))
6546 /* Decide if the given section should be included in the given segment.
6547 A section will be included if:
6548 1. It is within the address space of the segment -- we use the LMA
6549 if that is set for the segment and the VMA otherwise,
6550 2. It is an allocated section or a NOTE section in a PT_NOTE
6552 3. There is an output section associated with it,
6553 4. The section has not already been allocated to a previous segment.
6554 5. PT_GNU_STACK segments do not include any sections.
6555 6. PT_TLS segment includes only SHF_TLS sections.
6556 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
6557 8. PT_DYNAMIC should not contain empty sections at the beginning
6558 (with the possible exception of .dynamic). */
6559 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
6560 ((((segment->p_paddr \
6561 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
6562 : IS_CONTAINED_BY_VMA (section, segment)) \
6563 && (section->flags & SEC_ALLOC) != 0) \
6564 || IS_NOTE (segment, section)) \
6565 && segment->p_type != PT_GNU_STACK \
6566 && (segment->p_type != PT_TLS \
6567 || (section->flags & SEC_THREAD_LOCAL)) \
6568 && (segment->p_type == PT_LOAD \
6569 || segment->p_type == PT_TLS \
6570 || (section->flags & SEC_THREAD_LOCAL) == 0) \
6571 && (segment->p_type != PT_DYNAMIC \
6572 || SECTION_SIZE (section, segment) > 0 \
6573 || (segment->p_paddr \
6574 ? segment->p_paddr != section->lma \
6575 : segment->p_vaddr != section->vma) \
6576 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
6578 && !section->segment_mark)
6580 /* If the output section of a section in the input segment is NULL,
6581 it is removed from the corresponding output segment. */
6582 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
6583 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
6584 && section->output_section != NULL)
6586 /* Returns TRUE iff seg1 starts after the end of seg2. */
6587 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
6588 (seg1->field >= SEGMENT_END (seg2, seg2->field))
6590 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
6591 their VMA address ranges and their LMA address ranges overlap.
6592 It is possible to have overlapping VMA ranges without overlapping LMA
6593 ranges. RedBoot images for example can have both .data and .bss mapped
6594 to the same VMA range, but with the .data section mapped to a different
6596 #define SEGMENT_OVERLAPS(seg1, seg2) \
6597 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
6598 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
6599 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
6600 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
6602 /* Initialise the segment mark field. */
6603 for (section = ibfd->sections; section != NULL; section = section->next)
6604 section->segment_mark = FALSE;
6606 /* The Solaris linker creates program headers in which all the
6607 p_paddr fields are zero. When we try to objcopy or strip such a
6608 file, we get confused. Check for this case, and if we find it
6609 don't set the p_paddr_valid fields. */
6610 p_paddr_valid = FALSE;
6611 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6614 if (segment->p_paddr != 0)
6616 p_paddr_valid = TRUE;
6620 /* Scan through the segments specified in the program header
6621 of the input BFD. For this first scan we look for overlaps
6622 in the loadable segments. These can be created by weird
6623 parameters to objcopy. Also, fix some solaris weirdness. */
6624 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6629 Elf_Internal_Phdr *segment2;
6631 if (segment->p_type == PT_INTERP)
6632 for (section = ibfd->sections; section; section = section->next)
6633 if (IS_SOLARIS_PT_INTERP (segment, section))
6635 /* Mininal change so that the normal section to segment
6636 assignment code will work. */
6637 segment->p_vaddr = section->vma;
6641 if (segment->p_type != PT_LOAD)
6643 /* Remove PT_GNU_RELRO segment. */
6644 if (segment->p_type == PT_GNU_RELRO)
6645 segment->p_type = PT_NULL;
6649 /* Determine if this segment overlaps any previous segments. */
6650 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++)
6652 bfd_signed_vma extra_length;
6654 if (segment2->p_type != PT_LOAD
6655 || !SEGMENT_OVERLAPS (segment, segment2))
6658 /* Merge the two segments together. */
6659 if (segment2->p_vaddr < segment->p_vaddr)
6661 /* Extend SEGMENT2 to include SEGMENT and then delete
6663 extra_length = (SEGMENT_END (segment, segment->p_vaddr)
6664 - SEGMENT_END (segment2, segment2->p_vaddr));
6666 if (extra_length > 0)
6668 segment2->p_memsz += extra_length;
6669 segment2->p_filesz += extra_length;
6672 segment->p_type = PT_NULL;
6674 /* Since we have deleted P we must restart the outer loop. */
6676 segment = elf_tdata (ibfd)->phdr;
6681 /* Extend SEGMENT to include SEGMENT2 and then delete
6683 extra_length = (SEGMENT_END (segment2, segment2->p_vaddr)
6684 - SEGMENT_END (segment, segment->p_vaddr));
6686 if (extra_length > 0)
6688 segment->p_memsz += extra_length;
6689 segment->p_filesz += extra_length;
6692 segment2->p_type = PT_NULL;
6697 /* The second scan attempts to assign sections to segments. */
6698 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6702 unsigned int section_count;
6703 asection **sections;
6704 asection *output_section;
6706 bfd_vma matching_lma;
6707 bfd_vma suggested_lma;
6710 asection *first_section;
6711 bfd_boolean first_matching_lma;
6712 bfd_boolean first_suggested_lma;
6714 if (segment->p_type == PT_NULL)
6717 first_section = NULL;
6718 /* Compute how many sections might be placed into this segment. */
6719 for (section = ibfd->sections, section_count = 0;
6721 section = section->next)
6723 /* Find the first section in the input segment, which may be
6724 removed from the corresponding output segment. */
6725 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
6727 if (first_section == NULL)
6728 first_section = section;
6729 if (section->output_section != NULL)
6734 /* Allocate a segment map big enough to contain
6735 all of the sections we have selected. */
6736 amt = sizeof (struct elf_segment_map);
6737 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
6738 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
6742 /* Initialise the fields of the segment map. Default to
6743 using the physical address of the segment in the input BFD. */
6745 map->p_type = segment->p_type;
6746 map->p_flags = segment->p_flags;
6747 map->p_flags_valid = 1;
6749 /* If the first section in the input segment is removed, there is
6750 no need to preserve segment physical address in the corresponding
6752 if (!first_section || first_section->output_section != NULL)
6754 map->p_paddr = segment->p_paddr;
6755 map->p_paddr_valid = p_paddr_valid;
6758 /* Determine if this segment contains the ELF file header
6759 and if it contains the program headers themselves. */
6760 map->includes_filehdr = (segment->p_offset == 0
6761 && segment->p_filesz >= iehdr->e_ehsize);
6762 map->includes_phdrs = 0;
6764 if (!phdr_included || segment->p_type != PT_LOAD)
6766 map->includes_phdrs =
6767 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
6768 && (segment->p_offset + segment->p_filesz
6769 >= ((bfd_vma) iehdr->e_phoff
6770 + iehdr->e_phnum * iehdr->e_phentsize)));
6772 if (segment->p_type == PT_LOAD && map->includes_phdrs)
6773 phdr_included = TRUE;
6776 if (section_count == 0)
6778 /* Special segments, such as the PT_PHDR segment, may contain
6779 no sections, but ordinary, loadable segments should contain
6780 something. They are allowed by the ELF spec however, so only
6781 a warning is produced.
6782 There is however the valid use case of embedded systems which
6783 have segments with p_filesz of 0 and a p_memsz > 0 to initialize
6784 flash memory with zeros. No warning is shown for that case. */
6785 if (segment->p_type == PT_LOAD
6786 && (segment->p_filesz > 0 || segment->p_memsz == 0))
6787 /* xgettext:c-format */
6788 _bfd_error_handler (_("%B: warning: Empty loadable segment detected"
6789 " at vaddr=%#Lx, is this intentional?"),
6790 ibfd, segment->p_vaddr);
6793 *pointer_to_map = map;
6794 pointer_to_map = &map->next;
6799 /* Now scan the sections in the input BFD again and attempt
6800 to add their corresponding output sections to the segment map.
6801 The problem here is how to handle an output section which has
6802 been moved (ie had its LMA changed). There are four possibilities:
6804 1. None of the sections have been moved.
6805 In this case we can continue to use the segment LMA from the
6808 2. All of the sections have been moved by the same amount.
6809 In this case we can change the segment's LMA to match the LMA
6810 of the first section.
6812 3. Some of the sections have been moved, others have not.
6813 In this case those sections which have not been moved can be
6814 placed in the current segment which will have to have its size,
6815 and possibly its LMA changed, and a new segment or segments will
6816 have to be created to contain the other sections.
6818 4. The sections have been moved, but not by the same amount.
6819 In this case we can change the segment's LMA to match the LMA
6820 of the first section and we will have to create a new segment
6821 or segments to contain the other sections.
6823 In order to save time, we allocate an array to hold the section
6824 pointers that we are interested in. As these sections get assigned
6825 to a segment, they are removed from this array. */
6827 sections = (asection **) bfd_malloc2 (section_count, sizeof (asection *));
6828 if (sections == NULL)
6831 /* Step One: Scan for segment vs section LMA conflicts.
6832 Also add the sections to the section array allocated above.
6833 Also add the sections to the current segment. In the common
6834 case, where the sections have not been moved, this means that
6835 we have completely filled the segment, and there is nothing
6840 first_matching_lma = TRUE;
6841 first_suggested_lma = TRUE;
6843 for (section = first_section, j = 0;
6845 section = section->next)
6847 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
6849 output_section = section->output_section;
6851 sections[j++] = section;
6853 /* The Solaris native linker always sets p_paddr to 0.
6854 We try to catch that case here, and set it to the
6855 correct value. Note - some backends require that
6856 p_paddr be left as zero. */
6858 && segment->p_vaddr != 0
6859 && !bed->want_p_paddr_set_to_zero
6861 && output_section->lma != 0
6862 && output_section->vma == (segment->p_vaddr
6863 + (map->includes_filehdr
6866 + (map->includes_phdrs
6868 * iehdr->e_phentsize)
6870 map->p_paddr = segment->p_vaddr;
6872 /* Match up the physical address of the segment with the
6873 LMA address of the output section. */
6874 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
6875 || IS_COREFILE_NOTE (segment, section)
6876 || (bed->want_p_paddr_set_to_zero
6877 && IS_CONTAINED_BY_VMA (output_section, segment)))
6879 if (first_matching_lma || output_section->lma < matching_lma)
6881 matching_lma = output_section->lma;
6882 first_matching_lma = FALSE;
6885 /* We assume that if the section fits within the segment
6886 then it does not overlap any other section within that
6888 map->sections[isec++] = output_section;
6890 else if (first_suggested_lma)
6892 suggested_lma = output_section->lma;
6893 first_suggested_lma = FALSE;
6896 if (j == section_count)
6901 BFD_ASSERT (j == section_count);
6903 /* Step Two: Adjust the physical address of the current segment,
6905 if (isec == section_count)
6907 /* All of the sections fitted within the segment as currently
6908 specified. This is the default case. Add the segment to
6909 the list of built segments and carry on to process the next
6910 program header in the input BFD. */
6911 map->count = section_count;
6912 *pointer_to_map = map;
6913 pointer_to_map = &map->next;
6916 && !bed->want_p_paddr_set_to_zero
6917 && matching_lma != map->p_paddr
6918 && !map->includes_filehdr
6919 && !map->includes_phdrs)
6920 /* There is some padding before the first section in the
6921 segment. So, we must account for that in the output
6923 map->p_vaddr_offset = matching_lma - map->p_paddr;
6930 if (!first_matching_lma)
6932 /* At least one section fits inside the current segment.
6933 Keep it, but modify its physical address to match the
6934 LMA of the first section that fitted. */
6935 map->p_paddr = matching_lma;
6939 /* None of the sections fitted inside the current segment.
6940 Change the current segment's physical address to match
6941 the LMA of the first section. */
6942 map->p_paddr = suggested_lma;
6945 /* Offset the segment physical address from the lma
6946 to allow for space taken up by elf headers. */
6947 if (map->includes_filehdr)
6949 if (map->p_paddr >= iehdr->e_ehsize)
6950 map->p_paddr -= iehdr->e_ehsize;
6953 map->includes_filehdr = FALSE;
6954 map->includes_phdrs = FALSE;
6958 if (map->includes_phdrs)
6960 if (map->p_paddr >= iehdr->e_phnum * iehdr->e_phentsize)
6962 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
6964 /* iehdr->e_phnum is just an estimate of the number
6965 of program headers that we will need. Make a note
6966 here of the number we used and the segment we chose
6967 to hold these headers, so that we can adjust the
6968 offset when we know the correct value. */
6969 phdr_adjust_num = iehdr->e_phnum;
6970 phdr_adjust_seg = map;
6973 map->includes_phdrs = FALSE;
6977 /* Step Three: Loop over the sections again, this time assigning
6978 those that fit to the current segment and removing them from the
6979 sections array; but making sure not to leave large gaps. Once all
6980 possible sections have been assigned to the current segment it is
6981 added to the list of built segments and if sections still remain
6982 to be assigned, a new segment is constructed before repeating
6989 first_suggested_lma = TRUE;
6991 /* Fill the current segment with sections that fit. */
6992 for (j = 0; j < section_count; j++)
6994 section = sections[j];
6996 if (section == NULL)
6999 output_section = section->output_section;
7001 BFD_ASSERT (output_section != NULL);
7003 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
7004 || IS_COREFILE_NOTE (segment, section))
7006 if (map->count == 0)
7008 /* If the first section in a segment does not start at
7009 the beginning of the segment, then something is
7011 if (output_section->lma
7013 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
7014 + (map->includes_phdrs
7015 ? iehdr->e_phnum * iehdr->e_phentsize
7023 prev_sec = map->sections[map->count - 1];
7025 /* If the gap between the end of the previous section
7026 and the start of this section is more than
7027 maxpagesize then we need to start a new segment. */
7028 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
7030 < BFD_ALIGN (output_section->lma, maxpagesize))
7031 || (prev_sec->lma + prev_sec->size
7032 > output_section->lma))
7034 if (first_suggested_lma)
7036 suggested_lma = output_section->lma;
7037 first_suggested_lma = FALSE;
7044 map->sections[map->count++] = output_section;
7047 section->segment_mark = TRUE;
7049 else if (first_suggested_lma)
7051 suggested_lma = output_section->lma;
7052 first_suggested_lma = FALSE;
7056 BFD_ASSERT (map->count > 0);
7058 /* Add the current segment to the list of built segments. */
7059 *pointer_to_map = map;
7060 pointer_to_map = &map->next;
7062 if (isec < section_count)
7064 /* We still have not allocated all of the sections to
7065 segments. Create a new segment here, initialise it
7066 and carry on looping. */
7067 amt = sizeof (struct elf_segment_map);
7068 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
7069 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
7076 /* Initialise the fields of the segment map. Set the physical
7077 physical address to the LMA of the first section that has
7078 not yet been assigned. */
7080 map->p_type = segment->p_type;
7081 map->p_flags = segment->p_flags;
7082 map->p_flags_valid = 1;
7083 map->p_paddr = suggested_lma;
7084 map->p_paddr_valid = p_paddr_valid;
7085 map->includes_filehdr = 0;
7086 map->includes_phdrs = 0;
7089 while (isec < section_count);
7094 elf_seg_map (obfd) = map_first;
7096 /* If we had to estimate the number of program headers that were
7097 going to be needed, then check our estimate now and adjust
7098 the offset if necessary. */
7099 if (phdr_adjust_seg != NULL)
7103 for (count = 0, map = map_first; map != NULL; map = map->next)
7106 if (count > phdr_adjust_num)
7107 phdr_adjust_seg->p_paddr
7108 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
7113 #undef IS_CONTAINED_BY_VMA
7114 #undef IS_CONTAINED_BY_LMA
7116 #undef IS_COREFILE_NOTE
7117 #undef IS_SOLARIS_PT_INTERP
7118 #undef IS_SECTION_IN_INPUT_SEGMENT
7119 #undef INCLUDE_SECTION_IN_SEGMENT
7120 #undef SEGMENT_AFTER_SEGMENT
7121 #undef SEGMENT_OVERLAPS
7125 /* Copy ELF program header information. */
7128 copy_elf_program_header (bfd *ibfd, bfd *obfd)
7130 Elf_Internal_Ehdr *iehdr;
7131 struct elf_segment_map *map;
7132 struct elf_segment_map *map_first;
7133 struct elf_segment_map **pointer_to_map;
7134 Elf_Internal_Phdr *segment;
7136 unsigned int num_segments;
7137 bfd_boolean phdr_included = FALSE;
7138 bfd_boolean p_paddr_valid;
7140 iehdr = elf_elfheader (ibfd);
7143 pointer_to_map = &map_first;
7145 /* If all the segment p_paddr fields are zero, don't set
7146 map->p_paddr_valid. */
7147 p_paddr_valid = FALSE;
7148 num_segments = elf_elfheader (ibfd)->e_phnum;
7149 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7152 if (segment->p_paddr != 0)
7154 p_paddr_valid = TRUE;
7158 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7163 unsigned int section_count;
7165 Elf_Internal_Shdr *this_hdr;
7166 asection *first_section = NULL;
7167 asection *lowest_section;
7169 /* Compute how many sections are in this segment. */
7170 for (section = ibfd->sections, section_count = 0;
7172 section = section->next)
7174 this_hdr = &(elf_section_data(section)->this_hdr);
7175 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7177 if (first_section == NULL)
7178 first_section = section;
7183 /* Allocate a segment map big enough to contain
7184 all of the sections we have selected. */
7185 amt = sizeof (struct elf_segment_map);
7186 if (section_count != 0)
7187 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
7188 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
7192 /* Initialize the fields of the output segment map with the
7195 map->p_type = segment->p_type;
7196 map->p_flags = segment->p_flags;
7197 map->p_flags_valid = 1;
7198 map->p_paddr = segment->p_paddr;
7199 map->p_paddr_valid = p_paddr_valid;
7200 map->p_align = segment->p_align;
7201 map->p_align_valid = 1;
7202 map->p_vaddr_offset = 0;
7204 if (map->p_type == PT_GNU_RELRO
7205 || map->p_type == PT_GNU_STACK)
7207 /* The PT_GNU_RELRO segment may contain the first a few
7208 bytes in the .got.plt section even if the whole .got.plt
7209 section isn't in the PT_GNU_RELRO segment. We won't
7210 change the size of the PT_GNU_RELRO segment.
7211 Similarly, PT_GNU_STACK size is significant on uclinux
7213 map->p_size = segment->p_memsz;
7214 map->p_size_valid = 1;
7217 /* Determine if this segment contains the ELF file header
7218 and if it contains the program headers themselves. */
7219 map->includes_filehdr = (segment->p_offset == 0
7220 && segment->p_filesz >= iehdr->e_ehsize);
7222 map->includes_phdrs = 0;
7223 if (! phdr_included || segment->p_type != PT_LOAD)
7225 map->includes_phdrs =
7226 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
7227 && (segment->p_offset + segment->p_filesz
7228 >= ((bfd_vma) iehdr->e_phoff
7229 + iehdr->e_phnum * iehdr->e_phentsize)));
7231 if (segment->p_type == PT_LOAD && map->includes_phdrs)
7232 phdr_included = TRUE;
7235 lowest_section = NULL;
7236 if (section_count != 0)
7238 unsigned int isec = 0;
7240 for (section = first_section;
7242 section = section->next)
7244 this_hdr = &(elf_section_data(section)->this_hdr);
7245 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7247 map->sections[isec++] = section->output_section;
7248 if ((section->flags & SEC_ALLOC) != 0)
7252 if (lowest_section == NULL
7253 || section->lma < lowest_section->lma)
7254 lowest_section = section;
7256 /* Section lmas are set up from PT_LOAD header
7257 p_paddr in _bfd_elf_make_section_from_shdr.
7258 If this header has a p_paddr that disagrees
7259 with the section lma, flag the p_paddr as
7261 if ((section->flags & SEC_LOAD) != 0)
7262 seg_off = this_hdr->sh_offset - segment->p_offset;
7264 seg_off = this_hdr->sh_addr - segment->p_vaddr;
7265 if (section->lma - segment->p_paddr != seg_off)
7266 map->p_paddr_valid = FALSE;
7268 if (isec == section_count)
7274 if (map->includes_filehdr && lowest_section != NULL)
7275 /* We need to keep the space used by the headers fixed. */
7276 map->header_size = lowest_section->vma - segment->p_vaddr;
7278 if (!map->includes_phdrs
7279 && !map->includes_filehdr
7280 && map->p_paddr_valid)
7281 /* There is some other padding before the first section. */
7282 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
7283 - segment->p_paddr);
7285 map->count = section_count;
7286 *pointer_to_map = map;
7287 pointer_to_map = &map->next;
7290 elf_seg_map (obfd) = map_first;
7294 /* Copy private BFD data. This copies or rewrites ELF program header
7298 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
7300 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7301 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7304 if (elf_tdata (ibfd)->phdr == NULL)
7307 if (ibfd->xvec == obfd->xvec)
7309 /* Check to see if any sections in the input BFD
7310 covered by ELF program header have changed. */
7311 Elf_Internal_Phdr *segment;
7312 asection *section, *osec;
7313 unsigned int i, num_segments;
7314 Elf_Internal_Shdr *this_hdr;
7315 const struct elf_backend_data *bed;
7317 bed = get_elf_backend_data (ibfd);
7319 /* Regenerate the segment map if p_paddr is set to 0. */
7320 if (bed->want_p_paddr_set_to_zero)
7323 /* Initialize the segment mark field. */
7324 for (section = obfd->sections; section != NULL;
7325 section = section->next)
7326 section->segment_mark = FALSE;
7328 num_segments = elf_elfheader (ibfd)->e_phnum;
7329 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7333 /* PR binutils/3535. The Solaris linker always sets the p_paddr
7334 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
7335 which severly confuses things, so always regenerate the segment
7336 map in this case. */
7337 if (segment->p_paddr == 0
7338 && segment->p_memsz == 0
7339 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
7342 for (section = ibfd->sections;
7343 section != NULL; section = section->next)
7345 /* We mark the output section so that we know it comes
7346 from the input BFD. */
7347 osec = section->output_section;
7349 osec->segment_mark = TRUE;
7351 /* Check if this section is covered by the segment. */
7352 this_hdr = &(elf_section_data(section)->this_hdr);
7353 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7355 /* FIXME: Check if its output section is changed or
7356 removed. What else do we need to check? */
7358 || section->flags != osec->flags
7359 || section->lma != osec->lma
7360 || section->vma != osec->vma
7361 || section->size != osec->size
7362 || section->rawsize != osec->rawsize
7363 || section->alignment_power != osec->alignment_power)
7369 /* Check to see if any output section do not come from the
7371 for (section = obfd->sections; section != NULL;
7372 section = section->next)
7374 if (!section->segment_mark)
7377 section->segment_mark = FALSE;
7380 return copy_elf_program_header (ibfd, obfd);
7384 if (ibfd->xvec == obfd->xvec)
7386 /* When rewriting program header, set the output maxpagesize to
7387 the maximum alignment of input PT_LOAD segments. */
7388 Elf_Internal_Phdr *segment;
7390 unsigned int num_segments = elf_elfheader (ibfd)->e_phnum;
7391 bfd_vma maxpagesize = 0;
7393 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7396 if (segment->p_type == PT_LOAD
7397 && maxpagesize < segment->p_align)
7399 /* PR 17512: file: f17299af. */
7400 if (segment->p_align > (bfd_vma) 1 << ((sizeof (bfd_vma) * 8) - 2))
7401 /* xgettext:c-format */
7402 _bfd_error_handler (_("%B: warning: segment alignment of %#Lx"
7404 ibfd, segment->p_align);
7406 maxpagesize = segment->p_align;
7409 if (maxpagesize != get_elf_backend_data (obfd)->maxpagesize)
7410 bfd_emul_set_maxpagesize (bfd_get_target (obfd), maxpagesize);
7413 return rewrite_elf_program_header (ibfd, obfd);
7416 /* Initialize private output section information from input section. */
7419 _bfd_elf_init_private_section_data (bfd *ibfd,
7423 struct bfd_link_info *link_info)
7426 Elf_Internal_Shdr *ihdr, *ohdr;
7427 bfd_boolean final_link = (link_info != NULL
7428 && !bfd_link_relocatable (link_info));
7430 if (ibfd->xvec->flavour != bfd_target_elf_flavour
7431 || obfd->xvec->flavour != bfd_target_elf_flavour)
7434 BFD_ASSERT (elf_section_data (osec) != NULL);
7436 /* For objcopy and relocatable link, don't copy the output ELF
7437 section type from input if the output BFD section flags have been
7438 set to something different. For a final link allow some flags
7439 that the linker clears to differ. */
7440 if (elf_section_type (osec) == SHT_NULL
7441 && (osec->flags == isec->flags
7443 && ((osec->flags ^ isec->flags)
7444 & ~(SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_RELOC)) == 0)))
7445 elf_section_type (osec) = elf_section_type (isec);
7447 /* FIXME: Is this correct for all OS/PROC specific flags? */
7448 elf_section_flags (osec) |= (elf_section_flags (isec)
7449 & (SHF_MASKOS | SHF_MASKPROC));
7451 /* Copy sh_info from input for mbind section. */
7452 if (elf_section_flags (isec) & SHF_GNU_MBIND)
7453 elf_section_data (osec)->this_hdr.sh_info
7454 = elf_section_data (isec)->this_hdr.sh_info;
7456 /* Set things up for objcopy and relocatable link. The output
7457 SHT_GROUP section will have its elf_next_in_group pointing back
7458 to the input group members. Ignore linker created group section.
7459 See elfNN_ia64_object_p in elfxx-ia64.c. */
7460 if ((link_info == NULL
7461 || !link_info->resolve_section_groups)
7462 && (elf_sec_group (isec) == NULL
7463 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0))
7465 if (elf_section_flags (isec) & SHF_GROUP)
7466 elf_section_flags (osec) |= SHF_GROUP;
7467 elf_next_in_group (osec) = elf_next_in_group (isec);
7468 elf_section_data (osec)->group = elf_section_data (isec)->group;
7471 /* If not decompress, preserve SHF_COMPRESSED. */
7472 if (!final_link && (ibfd->flags & BFD_DECOMPRESS) == 0)
7473 elf_section_flags (osec) |= (elf_section_flags (isec)
7476 ihdr = &elf_section_data (isec)->this_hdr;
7478 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
7479 don't use the output section of the linked-to section since it
7480 may be NULL at this point. */
7481 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
7483 ohdr = &elf_section_data (osec)->this_hdr;
7484 ohdr->sh_flags |= SHF_LINK_ORDER;
7485 elf_linked_to_section (osec) = elf_linked_to_section (isec);
7488 osec->use_rela_p = isec->use_rela_p;
7493 /* Copy private section information. This copies over the entsize
7494 field, and sometimes the info field. */
7497 _bfd_elf_copy_private_section_data (bfd *ibfd,
7502 Elf_Internal_Shdr *ihdr, *ohdr;
7504 if (ibfd->xvec->flavour != bfd_target_elf_flavour
7505 || obfd->xvec->flavour != bfd_target_elf_flavour)
7508 ihdr = &elf_section_data (isec)->this_hdr;
7509 ohdr = &elf_section_data (osec)->this_hdr;
7511 ohdr->sh_entsize = ihdr->sh_entsize;
7513 if (ihdr->sh_type == SHT_SYMTAB
7514 || ihdr->sh_type == SHT_DYNSYM
7515 || ihdr->sh_type == SHT_GNU_verneed
7516 || ihdr->sh_type == SHT_GNU_verdef)
7517 ohdr->sh_info = ihdr->sh_info;
7519 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
7523 /* Look at all the SHT_GROUP sections in IBFD, making any adjustments
7524 necessary if we are removing either the SHT_GROUP section or any of
7525 the group member sections. DISCARDED is the value that a section's
7526 output_section has if the section will be discarded, NULL when this
7527 function is called from objcopy, bfd_abs_section_ptr when called
7531 _bfd_elf_fixup_group_sections (bfd *ibfd, asection *discarded)
7535 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
7536 if (elf_section_type (isec) == SHT_GROUP)
7538 asection *first = elf_next_in_group (isec);
7539 asection *s = first;
7540 bfd_size_type removed = 0;
7544 /* If this member section is being output but the
7545 SHT_GROUP section is not, then clear the group info
7546 set up by _bfd_elf_copy_private_section_data. */
7547 if (s->output_section != discarded
7548 && isec->output_section == discarded)
7550 elf_section_flags (s->output_section) &= ~SHF_GROUP;
7551 elf_group_name (s->output_section) = NULL;
7553 /* Conversely, if the member section is not being output
7554 but the SHT_GROUP section is, then adjust its size. */
7555 else if (s->output_section == discarded
7556 && isec->output_section != discarded)
7558 s = elf_next_in_group (s);
7564 if (discarded != NULL)
7566 /* If we've been called for ld -r, then we need to
7567 adjust the input section size. This function may
7568 be called multiple times, so save the original
7570 if (isec->rawsize == 0)
7571 isec->rawsize = isec->size;
7572 isec->size = isec->rawsize - removed;
7576 /* Adjust the output section size when called from
7578 isec->output_section->size -= removed;
7586 /* Copy private header information. */
7589 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
7591 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7592 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7595 /* Copy over private BFD data if it has not already been copied.
7596 This must be done here, rather than in the copy_private_bfd_data
7597 entry point, because the latter is called after the section
7598 contents have been set, which means that the program headers have
7599 already been worked out. */
7600 if (elf_seg_map (obfd) == NULL && elf_tdata (ibfd)->phdr != NULL)
7602 if (! copy_private_bfd_data (ibfd, obfd))
7606 return _bfd_elf_fixup_group_sections (ibfd, NULL);
7609 /* Copy private symbol information. If this symbol is in a section
7610 which we did not map into a BFD section, try to map the section
7611 index correctly. We use special macro definitions for the mapped
7612 section indices; these definitions are interpreted by the
7613 swap_out_syms function. */
7615 #define MAP_ONESYMTAB (SHN_HIOS + 1)
7616 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
7617 #define MAP_STRTAB (SHN_HIOS + 3)
7618 #define MAP_SHSTRTAB (SHN_HIOS + 4)
7619 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
7622 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
7627 elf_symbol_type *isym, *osym;
7629 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7630 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7633 isym = elf_symbol_from (ibfd, isymarg);
7634 osym = elf_symbol_from (obfd, osymarg);
7637 && isym->internal_elf_sym.st_shndx != 0
7639 && bfd_is_abs_section (isym->symbol.section))
7643 shndx = isym->internal_elf_sym.st_shndx;
7644 if (shndx == elf_onesymtab (ibfd))
7645 shndx = MAP_ONESYMTAB;
7646 else if (shndx == elf_dynsymtab (ibfd))
7647 shndx = MAP_DYNSYMTAB;
7648 else if (shndx == elf_strtab_sec (ibfd))
7650 else if (shndx == elf_shstrtab_sec (ibfd))
7651 shndx = MAP_SHSTRTAB;
7652 else if (find_section_in_list (shndx, elf_symtab_shndx_list (ibfd)))
7653 shndx = MAP_SYM_SHNDX;
7654 osym->internal_elf_sym.st_shndx = shndx;
7660 /* Swap out the symbols. */
7663 swap_out_syms (bfd *abfd,
7664 struct elf_strtab_hash **sttp,
7667 const struct elf_backend_data *bed;
7670 struct elf_strtab_hash *stt;
7671 Elf_Internal_Shdr *symtab_hdr;
7672 Elf_Internal_Shdr *symtab_shndx_hdr;
7673 Elf_Internal_Shdr *symstrtab_hdr;
7674 struct elf_sym_strtab *symstrtab;
7675 bfd_byte *outbound_syms;
7676 bfd_byte *outbound_shndx;
7677 unsigned long outbound_syms_index;
7678 unsigned long outbound_shndx_index;
7680 unsigned int num_locals;
7682 bfd_boolean name_local_sections;
7684 if (!elf_map_symbols (abfd, &num_locals))
7687 /* Dump out the symtabs. */
7688 stt = _bfd_elf_strtab_init ();
7692 bed = get_elf_backend_data (abfd);
7693 symcount = bfd_get_symcount (abfd);
7694 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7695 symtab_hdr->sh_type = SHT_SYMTAB;
7696 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
7697 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
7698 symtab_hdr->sh_info = num_locals + 1;
7699 symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
7701 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
7702 symstrtab_hdr->sh_type = SHT_STRTAB;
7704 /* Allocate buffer to swap out the .strtab section. */
7705 symstrtab = (struct elf_sym_strtab *) bfd_malloc ((symcount + 1)
7706 * sizeof (*symstrtab));
7707 if (symstrtab == NULL)
7709 _bfd_elf_strtab_free (stt);
7713 outbound_syms = (bfd_byte *) bfd_alloc2 (abfd, 1 + symcount,
7714 bed->s->sizeof_sym);
7715 if (outbound_syms == NULL)
7718 _bfd_elf_strtab_free (stt);
7722 symtab_hdr->contents = outbound_syms;
7723 outbound_syms_index = 0;
7725 outbound_shndx = NULL;
7726 outbound_shndx_index = 0;
7728 if (elf_symtab_shndx_list (abfd))
7730 symtab_shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr;
7731 if (symtab_shndx_hdr->sh_name != 0)
7733 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
7734 outbound_shndx = (bfd_byte *)
7735 bfd_zalloc2 (abfd, 1 + symcount, sizeof (Elf_External_Sym_Shndx));
7736 if (outbound_shndx == NULL)
7739 symtab_shndx_hdr->contents = outbound_shndx;
7740 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
7741 symtab_shndx_hdr->sh_size = amt;
7742 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
7743 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
7745 /* FIXME: What about any other headers in the list ? */
7748 /* Now generate the data (for "contents"). */
7750 /* Fill in zeroth symbol and swap it out. */
7751 Elf_Internal_Sym sym;
7757 sym.st_shndx = SHN_UNDEF;
7758 sym.st_target_internal = 0;
7759 symstrtab[0].sym = sym;
7760 symstrtab[0].dest_index = outbound_syms_index;
7761 symstrtab[0].destshndx_index = outbound_shndx_index;
7762 outbound_syms_index++;
7763 if (outbound_shndx != NULL)
7764 outbound_shndx_index++;
7768 = (bed->elf_backend_name_local_section_symbols
7769 && bed->elf_backend_name_local_section_symbols (abfd));
7771 syms = bfd_get_outsymbols (abfd);
7772 for (idx = 0; idx < symcount;)
7774 Elf_Internal_Sym sym;
7775 bfd_vma value = syms[idx]->value;
7776 elf_symbol_type *type_ptr;
7777 flagword flags = syms[idx]->flags;
7780 if (!name_local_sections
7781 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
7783 /* Local section symbols have no name. */
7784 sym.st_name = (unsigned long) -1;
7788 /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize
7789 to get the final offset for st_name. */
7791 = (unsigned long) _bfd_elf_strtab_add (stt, syms[idx]->name,
7793 if (sym.st_name == (unsigned long) -1)
7797 type_ptr = elf_symbol_from (abfd, syms[idx]);
7799 if ((flags & BSF_SECTION_SYM) == 0
7800 && bfd_is_com_section (syms[idx]->section))
7802 /* ELF common symbols put the alignment into the `value' field,
7803 and the size into the `size' field. This is backwards from
7804 how BFD handles it, so reverse it here. */
7805 sym.st_size = value;
7806 if (type_ptr == NULL
7807 || type_ptr->internal_elf_sym.st_value == 0)
7808 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
7810 sym.st_value = type_ptr->internal_elf_sym.st_value;
7811 sym.st_shndx = _bfd_elf_section_from_bfd_section
7812 (abfd, syms[idx]->section);
7816 asection *sec = syms[idx]->section;
7819 if (sec->output_section)
7821 value += sec->output_offset;
7822 sec = sec->output_section;
7825 /* Don't add in the section vma for relocatable output. */
7826 if (! relocatable_p)
7828 sym.st_value = value;
7829 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
7831 if (bfd_is_abs_section (sec)
7833 && type_ptr->internal_elf_sym.st_shndx != 0)
7835 /* This symbol is in a real ELF section which we did
7836 not create as a BFD section. Undo the mapping done
7837 by copy_private_symbol_data. */
7838 shndx = type_ptr->internal_elf_sym.st_shndx;
7842 shndx = elf_onesymtab (abfd);
7845 shndx = elf_dynsymtab (abfd);
7848 shndx = elf_strtab_sec (abfd);
7851 shndx = elf_shstrtab_sec (abfd);
7854 if (elf_symtab_shndx_list (abfd))
7855 shndx = elf_symtab_shndx_list (abfd)->ndx;
7864 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
7866 if (shndx == SHN_BAD)
7870 /* Writing this would be a hell of a lot easier if
7871 we had some decent documentation on bfd, and
7872 knew what to expect of the library, and what to
7873 demand of applications. For example, it
7874 appears that `objcopy' might not set the
7875 section of a symbol to be a section that is
7876 actually in the output file. */
7877 sec2 = bfd_get_section_by_name (abfd, sec->name);
7879 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
7880 if (shndx == SHN_BAD)
7882 /* xgettext:c-format */
7883 _bfd_error_handler (_("\
7884 Unable to find equivalent output section for symbol '%s' from section '%s'"),
7885 syms[idx]->name ? syms[idx]->name : "<Local sym>",
7887 bfd_set_error (bfd_error_invalid_operation);
7893 sym.st_shndx = shndx;
7896 if ((flags & BSF_THREAD_LOCAL) != 0)
7898 else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0)
7899 type = STT_GNU_IFUNC;
7900 else if ((flags & BSF_FUNCTION) != 0)
7902 else if ((flags & BSF_OBJECT) != 0)
7904 else if ((flags & BSF_RELC) != 0)
7906 else if ((flags & BSF_SRELC) != 0)
7911 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
7914 /* Processor-specific types. */
7915 if (type_ptr != NULL
7916 && bed->elf_backend_get_symbol_type)
7917 type = ((*bed->elf_backend_get_symbol_type)
7918 (&type_ptr->internal_elf_sym, type));
7920 if (flags & BSF_SECTION_SYM)
7922 if (flags & BSF_GLOBAL)
7923 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
7925 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
7927 else if (bfd_is_com_section (syms[idx]->section))
7929 if (type != STT_TLS)
7931 if ((abfd->flags & BFD_CONVERT_ELF_COMMON))
7932 type = ((abfd->flags & BFD_USE_ELF_STT_COMMON)
7933 ? STT_COMMON : STT_OBJECT);
7935 type = ((flags & BSF_ELF_COMMON) != 0
7936 ? STT_COMMON : STT_OBJECT);
7938 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
7940 else if (bfd_is_und_section (syms[idx]->section))
7941 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
7945 else if (flags & BSF_FILE)
7946 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
7949 int bind = STB_LOCAL;
7951 if (flags & BSF_LOCAL)
7953 else if (flags & BSF_GNU_UNIQUE)
7954 bind = STB_GNU_UNIQUE;
7955 else if (flags & BSF_WEAK)
7957 else if (flags & BSF_GLOBAL)
7960 sym.st_info = ELF_ST_INFO (bind, type);
7963 if (type_ptr != NULL)
7965 sym.st_other = type_ptr->internal_elf_sym.st_other;
7966 sym.st_target_internal
7967 = type_ptr->internal_elf_sym.st_target_internal;
7972 sym.st_target_internal = 0;
7976 symstrtab[idx].sym = sym;
7977 symstrtab[idx].dest_index = outbound_syms_index;
7978 symstrtab[idx].destshndx_index = outbound_shndx_index;
7980 outbound_syms_index++;
7981 if (outbound_shndx != NULL)
7982 outbound_shndx_index++;
7985 /* Finalize the .strtab section. */
7986 _bfd_elf_strtab_finalize (stt);
7988 /* Swap out the .strtab section. */
7989 for (idx = 0; idx <= symcount; idx++)
7991 struct elf_sym_strtab *elfsym = &symstrtab[idx];
7992 if (elfsym->sym.st_name == (unsigned long) -1)
7993 elfsym->sym.st_name = 0;
7995 elfsym->sym.st_name = _bfd_elf_strtab_offset (stt,
7996 elfsym->sym.st_name);
7997 bed->s->swap_symbol_out (abfd, &elfsym->sym,
7999 + (elfsym->dest_index
8000 * bed->s->sizeof_sym)),
8002 + (elfsym->destshndx_index
8003 * sizeof (Elf_External_Sym_Shndx))));
8008 symstrtab_hdr->sh_size = _bfd_elf_strtab_size (stt);
8009 symstrtab_hdr->sh_type = SHT_STRTAB;
8010 symstrtab_hdr->sh_flags = bed->elf_strtab_flags;
8011 symstrtab_hdr->sh_addr = 0;
8012 symstrtab_hdr->sh_entsize = 0;
8013 symstrtab_hdr->sh_link = 0;
8014 symstrtab_hdr->sh_info = 0;
8015 symstrtab_hdr->sh_addralign = 1;
8020 /* Return the number of bytes required to hold the symtab vector.
8022 Note that we base it on the count plus 1, since we will null terminate
8023 the vector allocated based on this size. However, the ELF symbol table
8024 always has a dummy entry as symbol #0, so it ends up even. */
8027 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
8031 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
8033 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
8034 symtab_size = (symcount + 1) * (sizeof (asymbol *));
8036 symtab_size -= sizeof (asymbol *);
8042 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
8046 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
8048 if (elf_dynsymtab (abfd) == 0)
8050 bfd_set_error (bfd_error_invalid_operation);
8054 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
8055 symtab_size = (symcount + 1) * (sizeof (asymbol *));
8057 symtab_size -= sizeof (asymbol *);
8063 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
8066 return (asect->reloc_count + 1) * sizeof (arelent *);
8069 /* Canonicalize the relocs. */
8072 _bfd_elf_canonicalize_reloc (bfd *abfd,
8079 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8081 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
8084 tblptr = section->relocation;
8085 for (i = 0; i < section->reloc_count; i++)
8086 *relptr++ = tblptr++;
8090 return section->reloc_count;
8094 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
8096 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8097 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
8100 bfd_get_symcount (abfd) = symcount;
8105 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
8106 asymbol **allocation)
8108 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8109 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
8112 bfd_get_dynamic_symcount (abfd) = symcount;
8116 /* Return the size required for the dynamic reloc entries. Any loadable
8117 section that was actually installed in the BFD, and has type SHT_REL
8118 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
8119 dynamic reloc section. */
8122 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
8127 if (elf_dynsymtab (abfd) == 0)
8129 bfd_set_error (bfd_error_invalid_operation);
8133 ret = sizeof (arelent *);
8134 for (s = abfd->sections; s != NULL; s = s->next)
8135 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
8136 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
8137 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
8138 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
8139 * sizeof (arelent *));
8144 /* Canonicalize the dynamic relocation entries. Note that we return the
8145 dynamic relocations as a single block, although they are actually
8146 associated with particular sections; the interface, which was
8147 designed for SunOS style shared libraries, expects that there is only
8148 one set of dynamic relocs. Any loadable section that was actually
8149 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
8150 dynamic symbol table, is considered to be a dynamic reloc section. */
8153 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
8157 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8161 if (elf_dynsymtab (abfd) == 0)
8163 bfd_set_error (bfd_error_invalid_operation);
8167 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8169 for (s = abfd->sections; s != NULL; s = s->next)
8171 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
8172 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
8173 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
8178 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
8180 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
8182 for (i = 0; i < count; i++)
8193 /* Read in the version information. */
8196 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
8198 bfd_byte *contents = NULL;
8199 unsigned int freeidx = 0;
8201 if (elf_dynverref (abfd) != 0)
8203 Elf_Internal_Shdr *hdr;
8204 Elf_External_Verneed *everneed;
8205 Elf_Internal_Verneed *iverneed;
8207 bfd_byte *contents_end;
8209 hdr = &elf_tdata (abfd)->dynverref_hdr;
8211 if (hdr->sh_info == 0
8212 || hdr->sh_info > hdr->sh_size / sizeof (Elf_External_Verneed))
8214 error_return_bad_verref:
8216 (_("%B: .gnu.version_r invalid entry"), abfd);
8217 bfd_set_error (bfd_error_bad_value);
8218 error_return_verref:
8219 elf_tdata (abfd)->verref = NULL;
8220 elf_tdata (abfd)->cverrefs = 0;
8224 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
8225 if (contents == NULL)
8226 goto error_return_verref;
8228 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
8229 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
8230 goto error_return_verref;
8232 elf_tdata (abfd)->verref = (Elf_Internal_Verneed *)
8233 bfd_alloc2 (abfd, hdr->sh_info, sizeof (Elf_Internal_Verneed));
8235 if (elf_tdata (abfd)->verref == NULL)
8236 goto error_return_verref;
8238 BFD_ASSERT (sizeof (Elf_External_Verneed)
8239 == sizeof (Elf_External_Vernaux));
8240 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
8241 everneed = (Elf_External_Verneed *) contents;
8242 iverneed = elf_tdata (abfd)->verref;
8243 for (i = 0; i < hdr->sh_info; i++, iverneed++)
8245 Elf_External_Vernaux *evernaux;
8246 Elf_Internal_Vernaux *ivernaux;
8249 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
8251 iverneed->vn_bfd = abfd;
8253 iverneed->vn_filename =
8254 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8256 if (iverneed->vn_filename == NULL)
8257 goto error_return_bad_verref;
8259 if (iverneed->vn_cnt == 0)
8260 iverneed->vn_auxptr = NULL;
8263 iverneed->vn_auxptr = (struct elf_internal_vernaux *)
8264 bfd_alloc2 (abfd, iverneed->vn_cnt,
8265 sizeof (Elf_Internal_Vernaux));
8266 if (iverneed->vn_auxptr == NULL)
8267 goto error_return_verref;
8270 if (iverneed->vn_aux
8271 > (size_t) (contents_end - (bfd_byte *) everneed))
8272 goto error_return_bad_verref;
8274 evernaux = ((Elf_External_Vernaux *)
8275 ((bfd_byte *) everneed + iverneed->vn_aux));
8276 ivernaux = iverneed->vn_auxptr;
8277 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
8279 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
8281 ivernaux->vna_nodename =
8282 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8283 ivernaux->vna_name);
8284 if (ivernaux->vna_nodename == NULL)
8285 goto error_return_bad_verref;
8287 if (ivernaux->vna_other > freeidx)
8288 freeidx = ivernaux->vna_other;
8290 ivernaux->vna_nextptr = NULL;
8291 if (ivernaux->vna_next == 0)
8293 iverneed->vn_cnt = j + 1;
8296 if (j + 1 < iverneed->vn_cnt)
8297 ivernaux->vna_nextptr = ivernaux + 1;
8299 if (ivernaux->vna_next
8300 > (size_t) (contents_end - (bfd_byte *) evernaux))
8301 goto error_return_bad_verref;
8303 evernaux = ((Elf_External_Vernaux *)
8304 ((bfd_byte *) evernaux + ivernaux->vna_next));
8307 iverneed->vn_nextref = NULL;
8308 if (iverneed->vn_next == 0)
8310 if (i + 1 < hdr->sh_info)
8311 iverneed->vn_nextref = iverneed + 1;
8313 if (iverneed->vn_next
8314 > (size_t) (contents_end - (bfd_byte *) everneed))
8315 goto error_return_bad_verref;
8317 everneed = ((Elf_External_Verneed *)
8318 ((bfd_byte *) everneed + iverneed->vn_next));
8320 elf_tdata (abfd)->cverrefs = i;
8326 if (elf_dynverdef (abfd) != 0)
8328 Elf_Internal_Shdr *hdr;
8329 Elf_External_Verdef *everdef;
8330 Elf_Internal_Verdef *iverdef;
8331 Elf_Internal_Verdef *iverdefarr;
8332 Elf_Internal_Verdef iverdefmem;
8334 unsigned int maxidx;
8335 bfd_byte *contents_end_def, *contents_end_aux;
8337 hdr = &elf_tdata (abfd)->dynverdef_hdr;
8339 if (hdr->sh_info == 0 || hdr->sh_size < sizeof (Elf_External_Verdef))
8341 error_return_bad_verdef:
8343 (_("%B: .gnu.version_d invalid entry"), abfd);
8344 bfd_set_error (bfd_error_bad_value);
8345 error_return_verdef:
8346 elf_tdata (abfd)->verdef = NULL;
8347 elf_tdata (abfd)->cverdefs = 0;
8351 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
8352 if (contents == NULL)
8353 goto error_return_verdef;
8354 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
8355 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
8356 goto error_return_verdef;
8358 BFD_ASSERT (sizeof (Elf_External_Verdef)
8359 >= sizeof (Elf_External_Verdaux));
8360 contents_end_def = contents + hdr->sh_size
8361 - sizeof (Elf_External_Verdef);
8362 contents_end_aux = contents + hdr->sh_size
8363 - sizeof (Elf_External_Verdaux);
8365 /* We know the number of entries in the section but not the maximum
8366 index. Therefore we have to run through all entries and find
8368 everdef = (Elf_External_Verdef *) contents;
8370 for (i = 0; i < hdr->sh_info; ++i)
8372 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
8374 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) == 0)
8375 goto error_return_bad_verdef;
8376 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
8377 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
8379 if (iverdefmem.vd_next == 0)
8382 if (iverdefmem.vd_next
8383 > (size_t) (contents_end_def - (bfd_byte *) everdef))
8384 goto error_return_bad_verdef;
8386 everdef = ((Elf_External_Verdef *)
8387 ((bfd_byte *) everdef + iverdefmem.vd_next));
8390 if (default_imported_symver)
8392 if (freeidx > maxidx)
8398 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
8399 bfd_zalloc2 (abfd, maxidx, sizeof (Elf_Internal_Verdef));
8400 if (elf_tdata (abfd)->verdef == NULL)
8401 goto error_return_verdef;
8403 elf_tdata (abfd)->cverdefs = maxidx;
8405 everdef = (Elf_External_Verdef *) contents;
8406 iverdefarr = elf_tdata (abfd)->verdef;
8407 for (i = 0; i < hdr->sh_info; i++)
8409 Elf_External_Verdaux *everdaux;
8410 Elf_Internal_Verdaux *iverdaux;
8413 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
8415 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
8416 goto error_return_bad_verdef;
8418 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
8419 memcpy (iverdef, &iverdefmem, offsetof (Elf_Internal_Verdef, vd_bfd));
8421 iverdef->vd_bfd = abfd;
8423 if (iverdef->vd_cnt == 0)
8424 iverdef->vd_auxptr = NULL;
8427 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
8428 bfd_alloc2 (abfd, iverdef->vd_cnt,
8429 sizeof (Elf_Internal_Verdaux));
8430 if (iverdef->vd_auxptr == NULL)
8431 goto error_return_verdef;
8435 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
8436 goto error_return_bad_verdef;
8438 everdaux = ((Elf_External_Verdaux *)
8439 ((bfd_byte *) everdef + iverdef->vd_aux));
8440 iverdaux = iverdef->vd_auxptr;
8441 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
8443 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
8445 iverdaux->vda_nodename =
8446 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8447 iverdaux->vda_name);
8448 if (iverdaux->vda_nodename == NULL)
8449 goto error_return_bad_verdef;
8451 iverdaux->vda_nextptr = NULL;
8452 if (iverdaux->vda_next == 0)
8454 iverdef->vd_cnt = j + 1;
8457 if (j + 1 < iverdef->vd_cnt)
8458 iverdaux->vda_nextptr = iverdaux + 1;
8460 if (iverdaux->vda_next
8461 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
8462 goto error_return_bad_verdef;
8464 everdaux = ((Elf_External_Verdaux *)
8465 ((bfd_byte *) everdaux + iverdaux->vda_next));
8468 iverdef->vd_nodename = NULL;
8469 if (iverdef->vd_cnt)
8470 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
8472 iverdef->vd_nextdef = NULL;
8473 if (iverdef->vd_next == 0)
8475 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
8476 iverdef->vd_nextdef = iverdef + 1;
8478 everdef = ((Elf_External_Verdef *)
8479 ((bfd_byte *) everdef + iverdef->vd_next));
8485 else if (default_imported_symver)
8492 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
8493 bfd_zalloc2 (abfd, freeidx, sizeof (Elf_Internal_Verdef));
8494 if (elf_tdata (abfd)->verdef == NULL)
8497 elf_tdata (abfd)->cverdefs = freeidx;
8500 /* Create a default version based on the soname. */
8501 if (default_imported_symver)
8503 Elf_Internal_Verdef *iverdef;
8504 Elf_Internal_Verdaux *iverdaux;
8506 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];
8508 iverdef->vd_version = VER_DEF_CURRENT;
8509 iverdef->vd_flags = 0;
8510 iverdef->vd_ndx = freeidx;
8511 iverdef->vd_cnt = 1;
8513 iverdef->vd_bfd = abfd;
8515 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
8516 if (iverdef->vd_nodename == NULL)
8517 goto error_return_verdef;
8518 iverdef->vd_nextdef = NULL;
8519 iverdef->vd_auxptr = ((struct elf_internal_verdaux *)
8520 bfd_zalloc (abfd, sizeof (Elf_Internal_Verdaux)));
8521 if (iverdef->vd_auxptr == NULL)
8522 goto error_return_verdef;
8524 iverdaux = iverdef->vd_auxptr;
8525 iverdaux->vda_nodename = iverdef->vd_nodename;
8531 if (contents != NULL)
8537 _bfd_elf_make_empty_symbol (bfd *abfd)
8539 elf_symbol_type *newsym;
8541 newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof * newsym);
8544 newsym->symbol.the_bfd = abfd;
8545 return &newsym->symbol;
8549 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
8553 bfd_symbol_info (symbol, ret);
8556 /* Return whether a symbol name implies a local symbol. Most targets
8557 use this function for the is_local_label_name entry point, but some
8561 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
8564 /* Normal local symbols start with ``.L''. */
8565 if (name[0] == '.' && name[1] == 'L')
8568 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
8569 DWARF debugging symbols starting with ``..''. */
8570 if (name[0] == '.' && name[1] == '.')
8573 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
8574 emitting DWARF debugging output. I suspect this is actually a
8575 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
8576 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
8577 underscore to be emitted on some ELF targets). For ease of use,
8578 we treat such symbols as local. */
8579 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
8582 /* Treat assembler generated fake symbols, dollar local labels and
8583 forward-backward labels (aka local labels) as locals.
8584 These labels have the form:
8586 L0^A.* (fake symbols)
8588 [.]?L[0123456789]+{^A|^B}[0123456789]* (local labels)
8590 Versions which start with .L will have already been matched above,
8591 so we only need to match the rest. */
8592 if (name[0] == 'L' && ISDIGIT (name[1]))
8594 bfd_boolean ret = FALSE;
8598 for (p = name + 2; (c = *p); p++)
8600 if (c == 1 || c == 2)
8602 if (c == 1 && p == name + 2)
8603 /* A fake symbol. */
8606 /* FIXME: We are being paranoid here and treating symbols like
8607 L0^Bfoo as if there were non-local, on the grounds that the
8608 assembler will never generate them. But can any symbol
8609 containing an ASCII value in the range 1-31 ever be anything
8610 other than some kind of local ? */
8627 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
8628 asymbol *symbol ATTRIBUTE_UNUSED)
8635 _bfd_elf_set_arch_mach (bfd *abfd,
8636 enum bfd_architecture arch,
8637 unsigned long machine)
8639 /* If this isn't the right architecture for this backend, and this
8640 isn't the generic backend, fail. */
8641 if (arch != get_elf_backend_data (abfd)->arch
8642 && arch != bfd_arch_unknown
8643 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
8646 return bfd_default_set_arch_mach (abfd, arch, machine);
8649 /* Find the nearest line to a particular section and offset,
8650 for error reporting. */
8653 _bfd_elf_find_nearest_line (bfd *abfd,
8657 const char **filename_ptr,
8658 const char **functionname_ptr,
8659 unsigned int *line_ptr,
8660 unsigned int *discriminator_ptr)
8664 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
8665 filename_ptr, functionname_ptr,
8666 line_ptr, discriminator_ptr,
8667 dwarf_debug_sections, 0,
8668 &elf_tdata (abfd)->dwarf2_find_line_info)
8669 || _bfd_dwarf1_find_nearest_line (abfd, symbols, section, offset,
8670 filename_ptr, functionname_ptr,
8673 if (!*functionname_ptr)
8674 _bfd_elf_find_function (abfd, symbols, section, offset,
8675 *filename_ptr ? NULL : filename_ptr,
8680 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
8681 &found, filename_ptr,
8682 functionname_ptr, line_ptr,
8683 &elf_tdata (abfd)->line_info))
8685 if (found && (*functionname_ptr || *line_ptr))
8688 if (symbols == NULL)
8691 if (! _bfd_elf_find_function (abfd, symbols, section, offset,
8692 filename_ptr, functionname_ptr))
8699 /* Find the line for a symbol. */
8702 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
8703 const char **filename_ptr, unsigned int *line_ptr)
8705 return _bfd_dwarf2_find_nearest_line (abfd, symbols, symbol, NULL, 0,
8706 filename_ptr, NULL, line_ptr, NULL,
8707 dwarf_debug_sections, 0,
8708 &elf_tdata (abfd)->dwarf2_find_line_info);
8711 /* After a call to bfd_find_nearest_line, successive calls to
8712 bfd_find_inliner_info can be used to get source information about
8713 each level of function inlining that terminated at the address
8714 passed to bfd_find_nearest_line. Currently this is only supported
8715 for DWARF2 with appropriate DWARF3 extensions. */
8718 _bfd_elf_find_inliner_info (bfd *abfd,
8719 const char **filename_ptr,
8720 const char **functionname_ptr,
8721 unsigned int *line_ptr)
8724 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
8725 functionname_ptr, line_ptr,
8726 & elf_tdata (abfd)->dwarf2_find_line_info);
8731 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
8733 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8734 int ret = bed->s->sizeof_ehdr;
8736 if (!bfd_link_relocatable (info))
8738 bfd_size_type phdr_size = elf_program_header_size (abfd);
8740 if (phdr_size == (bfd_size_type) -1)
8742 struct elf_segment_map *m;
8745 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
8746 phdr_size += bed->s->sizeof_phdr;
8749 phdr_size = get_program_header_size (abfd, info);
8752 elf_program_header_size (abfd) = phdr_size;
8760 _bfd_elf_set_section_contents (bfd *abfd,
8762 const void *location,
8764 bfd_size_type count)
8766 Elf_Internal_Shdr *hdr;
8769 if (! abfd->output_has_begun
8770 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
8776 hdr = &elf_section_data (section)->this_hdr;
8777 if (hdr->sh_offset == (file_ptr) -1)
8779 /* We must compress this section. Write output to the buffer. */
8780 unsigned char *contents = hdr->contents;
8781 if ((offset + count) > hdr->sh_size
8782 || (section->flags & SEC_ELF_COMPRESS) == 0
8783 || contents == NULL)
8785 memcpy (contents + offset, location, count);
8788 pos = hdr->sh_offset + offset;
8789 if (bfd_seek (abfd, pos, SEEK_SET) != 0
8790 || bfd_bwrite (location, count, abfd) != count)
8797 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
8798 arelent *cache_ptr ATTRIBUTE_UNUSED,
8799 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
8804 /* Try to convert a non-ELF reloc into an ELF one. */
8807 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
8809 /* Check whether we really have an ELF howto. */
8811 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
8813 bfd_reloc_code_real_type code;
8814 reloc_howto_type *howto;
8816 /* Alien reloc: Try to determine its type to replace it with an
8817 equivalent ELF reloc. */
8819 if (areloc->howto->pc_relative)
8821 switch (areloc->howto->bitsize)
8824 code = BFD_RELOC_8_PCREL;
8827 code = BFD_RELOC_12_PCREL;
8830 code = BFD_RELOC_16_PCREL;
8833 code = BFD_RELOC_24_PCREL;
8836 code = BFD_RELOC_32_PCREL;
8839 code = BFD_RELOC_64_PCREL;
8845 howto = bfd_reloc_type_lookup (abfd, code);
8847 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
8849 if (howto->pcrel_offset)
8850 areloc->addend += areloc->address;
8852 areloc->addend -= areloc->address; /* addend is unsigned!! */
8857 switch (areloc->howto->bitsize)
8863 code = BFD_RELOC_14;
8866 code = BFD_RELOC_16;
8869 code = BFD_RELOC_26;
8872 code = BFD_RELOC_32;
8875 code = BFD_RELOC_64;
8881 howto = bfd_reloc_type_lookup (abfd, code);
8885 areloc->howto = howto;
8894 /* xgettext:c-format */
8895 (_("%B: unsupported relocation type %s"),
8896 abfd, areloc->howto->name);
8897 bfd_set_error (bfd_error_bad_value);
8902 _bfd_elf_close_and_cleanup (bfd *abfd)
8904 struct elf_obj_tdata *tdata = elf_tdata (abfd);
8905 if (bfd_get_format (abfd) == bfd_object && tdata != NULL)
8907 if (elf_tdata (abfd)->o != NULL && elf_shstrtab (abfd) != NULL)
8908 _bfd_elf_strtab_free (elf_shstrtab (abfd));
8909 _bfd_dwarf2_cleanup_debug_info (abfd, &tdata->dwarf2_find_line_info);
8912 return _bfd_generic_close_and_cleanup (abfd);
8915 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
8916 in the relocation's offset. Thus we cannot allow any sort of sanity
8917 range-checking to interfere. There is nothing else to do in processing
8920 bfd_reloc_status_type
8921 _bfd_elf_rel_vtable_reloc_fn
8922 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
8923 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
8924 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
8925 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
8927 return bfd_reloc_ok;
8930 /* Elf core file support. Much of this only works on native
8931 toolchains, since we rely on knowing the
8932 machine-dependent procfs structure in order to pick
8933 out details about the corefile. */
8935 #ifdef HAVE_SYS_PROCFS_H
8936 /* Needed for new procfs interface on sparc-solaris. */
8937 # define _STRUCTURED_PROC 1
8938 # include <sys/procfs.h>
8941 /* Return a PID that identifies a "thread" for threaded cores, or the
8942 PID of the main process for non-threaded cores. */
8945 elfcore_make_pid (bfd *abfd)
8949 pid = elf_tdata (abfd)->core->lwpid;
8951 pid = elf_tdata (abfd)->core->pid;
8956 /* If there isn't a section called NAME, make one, using
8957 data from SECT. Note, this function will generate a
8958 reference to NAME, so you shouldn't deallocate or
8962 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
8966 if (bfd_get_section_by_name (abfd, name) != NULL)
8969 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
8973 sect2->size = sect->size;
8974 sect2->filepos = sect->filepos;
8975 sect2->alignment_power = sect->alignment_power;
8979 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
8980 actually creates up to two pseudosections:
8981 - For the single-threaded case, a section named NAME, unless
8982 such a section already exists.
8983 - For the multi-threaded case, a section named "NAME/PID", where
8984 PID is elfcore_make_pid (abfd).
8985 Both pseudosections have identical contents. */
8987 _bfd_elfcore_make_pseudosection (bfd *abfd,
8993 char *threaded_name;
8997 /* Build the section name. */
8999 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
9000 len = strlen (buf) + 1;
9001 threaded_name = (char *) bfd_alloc (abfd, len);
9002 if (threaded_name == NULL)
9004 memcpy (threaded_name, buf, len);
9006 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
9011 sect->filepos = filepos;
9012 sect->alignment_power = 2;
9014 return elfcore_maybe_make_sect (abfd, name, sect);
9017 /* prstatus_t exists on:
9019 linux 2.[01] + glibc
9023 #if defined (HAVE_PRSTATUS_T)
9026 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
9031 if (note->descsz == sizeof (prstatus_t))
9035 size = sizeof (prstat.pr_reg);
9036 offset = offsetof (prstatus_t, pr_reg);
9037 memcpy (&prstat, note->descdata, sizeof (prstat));
9039 /* Do not overwrite the core signal if it
9040 has already been set by another thread. */
9041 if (elf_tdata (abfd)->core->signal == 0)
9042 elf_tdata (abfd)->core->signal = prstat.pr_cursig;
9043 if (elf_tdata (abfd)->core->pid == 0)
9044 elf_tdata (abfd)->core->pid = prstat.pr_pid;
9046 /* pr_who exists on:
9049 pr_who doesn't exist on:
9052 #if defined (HAVE_PRSTATUS_T_PR_WHO)
9053 elf_tdata (abfd)->core->lwpid = prstat.pr_who;
9055 elf_tdata (abfd)->core->lwpid = prstat.pr_pid;
9058 #if defined (HAVE_PRSTATUS32_T)
9059 else if (note->descsz == sizeof (prstatus32_t))
9061 /* 64-bit host, 32-bit corefile */
9062 prstatus32_t prstat;
9064 size = sizeof (prstat.pr_reg);
9065 offset = offsetof (prstatus32_t, pr_reg);
9066 memcpy (&prstat, note->descdata, sizeof (prstat));
9068 /* Do not overwrite the core signal if it
9069 has already been set by another thread. */
9070 if (elf_tdata (abfd)->core->signal == 0)
9071 elf_tdata (abfd)->core->signal = prstat.pr_cursig;
9072 if (elf_tdata (abfd)->core->pid == 0)
9073 elf_tdata (abfd)->core->pid = prstat.pr_pid;
9075 /* pr_who exists on:
9078 pr_who doesn't exist on:
9081 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
9082 elf_tdata (abfd)->core->lwpid = prstat.pr_who;
9084 elf_tdata (abfd)->core->lwpid = prstat.pr_pid;
9087 #endif /* HAVE_PRSTATUS32_T */
9090 /* Fail - we don't know how to handle any other
9091 note size (ie. data object type). */
9095 /* Make a ".reg/999" section and a ".reg" section. */
9096 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
9097 size, note->descpos + offset);
9099 #endif /* defined (HAVE_PRSTATUS_T) */
9101 /* Create a pseudosection containing the exact contents of NOTE. */
9103 elfcore_make_note_pseudosection (bfd *abfd,
9105 Elf_Internal_Note *note)
9107 return _bfd_elfcore_make_pseudosection (abfd, name,
9108 note->descsz, note->descpos);
9111 /* There isn't a consistent prfpregset_t across platforms,
9112 but it doesn't matter, because we don't have to pick this
9113 data structure apart. */
9116 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
9118 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
9121 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
9122 type of NT_PRXFPREG. Just include the whole note's contents
9126 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
9128 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
9131 /* Linux dumps the Intel XSAVE extended state in a note named "LINUX"
9132 with a note type of NT_X86_XSTATE. Just include the whole note's
9133 contents literally. */
9136 elfcore_grok_xstatereg (bfd *abfd, Elf_Internal_Note *note)
9138 return elfcore_make_note_pseudosection (abfd, ".reg-xstate", note);
9142 elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note)
9144 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note);
9148 elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note)
9150 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note);
9154 elfcore_grok_s390_high_gprs (bfd *abfd, Elf_Internal_Note *note)
9156 return elfcore_make_note_pseudosection (abfd, ".reg-s390-high-gprs", note);
9160 elfcore_grok_s390_timer (bfd *abfd, Elf_Internal_Note *note)
9162 return elfcore_make_note_pseudosection (abfd, ".reg-s390-timer", note);
9166 elfcore_grok_s390_todcmp (bfd *abfd, Elf_Internal_Note *note)
9168 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todcmp", note);
9172 elfcore_grok_s390_todpreg (bfd *abfd, Elf_Internal_Note *note)
9174 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todpreg", note);
9178 elfcore_grok_s390_ctrs (bfd *abfd, Elf_Internal_Note *note)
9180 return elfcore_make_note_pseudosection (abfd, ".reg-s390-ctrs", note);
9184 elfcore_grok_s390_prefix (bfd *abfd, Elf_Internal_Note *note)
9186 return elfcore_make_note_pseudosection (abfd, ".reg-s390-prefix", note);
9190 elfcore_grok_s390_last_break (bfd *abfd, Elf_Internal_Note *note)
9192 return elfcore_make_note_pseudosection (abfd, ".reg-s390-last-break", note);
9196 elfcore_grok_s390_system_call (bfd *abfd, Elf_Internal_Note *note)
9198 return elfcore_make_note_pseudosection (abfd, ".reg-s390-system-call", note);
9202 elfcore_grok_s390_tdb (bfd *abfd, Elf_Internal_Note *note)
9204 return elfcore_make_note_pseudosection (abfd, ".reg-s390-tdb", note);
9208 elfcore_grok_s390_vxrs_low (bfd *abfd, Elf_Internal_Note *note)
9210 return elfcore_make_note_pseudosection (abfd, ".reg-s390-vxrs-low", note);
9214 elfcore_grok_s390_vxrs_high (bfd *abfd, Elf_Internal_Note *note)
9216 return elfcore_make_note_pseudosection (abfd, ".reg-s390-vxrs-high", note);
9220 elfcore_grok_s390_gs_cb (bfd *abfd, Elf_Internal_Note *note)
9222 return elfcore_make_note_pseudosection (abfd, ".reg-s390-gs-cb", note);
9226 elfcore_grok_s390_gs_bc (bfd *abfd, Elf_Internal_Note *note)
9228 return elfcore_make_note_pseudosection (abfd, ".reg-s390-gs-bc", note);
9232 elfcore_grok_arm_vfp (bfd *abfd, Elf_Internal_Note *note)
9234 return elfcore_make_note_pseudosection (abfd, ".reg-arm-vfp", note);
9238 elfcore_grok_aarch_tls (bfd *abfd, Elf_Internal_Note *note)
9240 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-tls", note);
9244 elfcore_grok_aarch_hw_break (bfd *abfd, Elf_Internal_Note *note)
9246 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-break", note);
9250 elfcore_grok_aarch_hw_watch (bfd *abfd, Elf_Internal_Note *note)
9252 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-watch", note);
9255 #if defined (HAVE_PRPSINFO_T)
9256 typedef prpsinfo_t elfcore_psinfo_t;
9257 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
9258 typedef prpsinfo32_t elfcore_psinfo32_t;
9262 #if defined (HAVE_PSINFO_T)
9263 typedef psinfo_t elfcore_psinfo_t;
9264 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
9265 typedef psinfo32_t elfcore_psinfo32_t;
9269 /* return a malloc'ed copy of a string at START which is at
9270 most MAX bytes long, possibly without a terminating '\0'.
9271 the copy will always have a terminating '\0'. */
9274 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
9277 char *end = (char *) memchr (start, '\0', max);
9285 dups = (char *) bfd_alloc (abfd, len + 1);
9289 memcpy (dups, start, len);
9295 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
9297 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
9299 if (note->descsz == sizeof (elfcore_psinfo_t))
9301 elfcore_psinfo_t psinfo;
9303 memcpy (&psinfo, note->descdata, sizeof (psinfo));
9305 #if defined (HAVE_PSINFO_T_PR_PID) || defined (HAVE_PRPSINFO_T_PR_PID)
9306 elf_tdata (abfd)->core->pid = psinfo.pr_pid;
9308 elf_tdata (abfd)->core->program
9309 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
9310 sizeof (psinfo.pr_fname));
9312 elf_tdata (abfd)->core->command
9313 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
9314 sizeof (psinfo.pr_psargs));
9316 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
9317 else if (note->descsz == sizeof (elfcore_psinfo32_t))
9319 /* 64-bit host, 32-bit corefile */
9320 elfcore_psinfo32_t psinfo;
9322 memcpy (&psinfo, note->descdata, sizeof (psinfo));
9324 #if defined (HAVE_PSINFO32_T_PR_PID) || defined (HAVE_PRPSINFO32_T_PR_PID)
9325 elf_tdata (abfd)->core->pid = psinfo.pr_pid;
9327 elf_tdata (abfd)->core->program
9328 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
9329 sizeof (psinfo.pr_fname));
9331 elf_tdata (abfd)->core->command
9332 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
9333 sizeof (psinfo.pr_psargs));
9339 /* Fail - we don't know how to handle any other
9340 note size (ie. data object type). */
9344 /* Note that for some reason, a spurious space is tacked
9345 onto the end of the args in some (at least one anyway)
9346 implementations, so strip it off if it exists. */
9349 char *command = elf_tdata (abfd)->core->command;
9350 int n = strlen (command);
9352 if (0 < n && command[n - 1] == ' ')
9353 command[n - 1] = '\0';
9358 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
9360 #if defined (HAVE_PSTATUS_T)
9362 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
9364 if (note->descsz == sizeof (pstatus_t)
9365 #if defined (HAVE_PXSTATUS_T)
9366 || note->descsz == sizeof (pxstatus_t)
9372 memcpy (&pstat, note->descdata, sizeof (pstat));
9374 elf_tdata (abfd)->core->pid = pstat.pr_pid;
9376 #if defined (HAVE_PSTATUS32_T)
9377 else if (note->descsz == sizeof (pstatus32_t))
9379 /* 64-bit host, 32-bit corefile */
9382 memcpy (&pstat, note->descdata, sizeof (pstat));
9384 elf_tdata (abfd)->core->pid = pstat.pr_pid;
9387 /* Could grab some more details from the "representative"
9388 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
9389 NT_LWPSTATUS note, presumably. */
9393 #endif /* defined (HAVE_PSTATUS_T) */
9395 #if defined (HAVE_LWPSTATUS_T)
9397 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
9399 lwpstatus_t lwpstat;
9405 if (note->descsz != sizeof (lwpstat)
9406 #if defined (HAVE_LWPXSTATUS_T)
9407 && note->descsz != sizeof (lwpxstatus_t)
9412 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
9414 elf_tdata (abfd)->core->lwpid = lwpstat.pr_lwpid;
9415 /* Do not overwrite the core signal if it has already been set by
9417 if (elf_tdata (abfd)->core->signal == 0)
9418 elf_tdata (abfd)->core->signal = lwpstat.pr_cursig;
9420 /* Make a ".reg/999" section. */
9422 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
9423 len = strlen (buf) + 1;
9424 name = bfd_alloc (abfd, len);
9427 memcpy (name, buf, len);
9429 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9433 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
9434 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
9435 sect->filepos = note->descpos
9436 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
9439 #if defined (HAVE_LWPSTATUS_T_PR_REG)
9440 sect->size = sizeof (lwpstat.pr_reg);
9441 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
9444 sect->alignment_power = 2;
9446 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
9449 /* Make a ".reg2/999" section */
9451 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
9452 len = strlen (buf) + 1;
9453 name = bfd_alloc (abfd, len);
9456 memcpy (name, buf, len);
9458 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9462 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
9463 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
9464 sect->filepos = note->descpos
9465 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
9468 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
9469 sect->size = sizeof (lwpstat.pr_fpreg);
9470 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
9473 sect->alignment_power = 2;
9475 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
9477 #endif /* defined (HAVE_LWPSTATUS_T) */
9480 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
9487 int is_active_thread;
9490 if (note->descsz < 728)
9493 if (! CONST_STRNEQ (note->namedata, "win32"))
9496 type = bfd_get_32 (abfd, note->descdata);
9500 case 1 /* NOTE_INFO_PROCESS */:
9501 /* FIXME: need to add ->core->command. */
9502 /* process_info.pid */
9503 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 8);
9504 /* process_info.signal */
9505 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 12);
9508 case 2 /* NOTE_INFO_THREAD */:
9509 /* Make a ".reg/999" section. */
9510 /* thread_info.tid */
9511 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
9513 len = strlen (buf) + 1;
9514 name = (char *) bfd_alloc (abfd, len);
9518 memcpy (name, buf, len);
9520 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9524 /* sizeof (thread_info.thread_context) */
9526 /* offsetof (thread_info.thread_context) */
9527 sect->filepos = note->descpos + 12;
9528 sect->alignment_power = 2;
9530 /* thread_info.is_active_thread */
9531 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
9533 if (is_active_thread)
9534 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
9538 case 3 /* NOTE_INFO_MODULE */:
9539 /* Make a ".module/xxxxxxxx" section. */
9540 /* module_info.base_address */
9541 base_addr = bfd_get_32 (abfd, note->descdata + 4);
9542 sprintf (buf, ".module/%08lx", (unsigned long) base_addr);
9544 len = strlen (buf) + 1;
9545 name = (char *) bfd_alloc (abfd, len);
9549 memcpy (name, buf, len);
9551 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9556 sect->size = note->descsz;
9557 sect->filepos = note->descpos;
9558 sect->alignment_power = 2;
9569 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
9571 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9579 if (bed->elf_backend_grok_prstatus)
9580 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
9582 #if defined (HAVE_PRSTATUS_T)
9583 return elfcore_grok_prstatus (abfd, note);
9588 #if defined (HAVE_PSTATUS_T)
9590 return elfcore_grok_pstatus (abfd, note);
9593 #if defined (HAVE_LWPSTATUS_T)
9595 return elfcore_grok_lwpstatus (abfd, note);
9598 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
9599 return elfcore_grok_prfpreg (abfd, note);
9601 case NT_WIN32PSTATUS:
9602 return elfcore_grok_win32pstatus (abfd, note);
9604 case NT_PRXFPREG: /* Linux SSE extension */
9605 if (note->namesz == 6
9606 && strcmp (note->namedata, "LINUX") == 0)
9607 return elfcore_grok_prxfpreg (abfd, note);
9611 case NT_X86_XSTATE: /* Linux XSAVE extension */
9612 if (note->namesz == 6
9613 && strcmp (note->namedata, "LINUX") == 0)
9614 return elfcore_grok_xstatereg (abfd, note);
9619 if (note->namesz == 6
9620 && strcmp (note->namedata, "LINUX") == 0)
9621 return elfcore_grok_ppc_vmx (abfd, note);
9626 if (note->namesz == 6
9627 && strcmp (note->namedata, "LINUX") == 0)
9628 return elfcore_grok_ppc_vsx (abfd, note);
9632 case NT_S390_HIGH_GPRS:
9633 if (note->namesz == 6
9634 && strcmp (note->namedata, "LINUX") == 0)
9635 return elfcore_grok_s390_high_gprs (abfd, note);
9640 if (note->namesz == 6
9641 && strcmp (note->namedata, "LINUX") == 0)
9642 return elfcore_grok_s390_timer (abfd, note);
9646 case NT_S390_TODCMP:
9647 if (note->namesz == 6
9648 && strcmp (note->namedata, "LINUX") == 0)
9649 return elfcore_grok_s390_todcmp (abfd, note);
9653 case NT_S390_TODPREG:
9654 if (note->namesz == 6
9655 && strcmp (note->namedata, "LINUX") == 0)
9656 return elfcore_grok_s390_todpreg (abfd, note);
9661 if (note->namesz == 6
9662 && strcmp (note->namedata, "LINUX") == 0)
9663 return elfcore_grok_s390_ctrs (abfd, note);
9667 case NT_S390_PREFIX:
9668 if (note->namesz == 6
9669 && strcmp (note->namedata, "LINUX") == 0)
9670 return elfcore_grok_s390_prefix (abfd, note);
9674 case NT_S390_LAST_BREAK:
9675 if (note->namesz == 6
9676 && strcmp (note->namedata, "LINUX") == 0)
9677 return elfcore_grok_s390_last_break (abfd, note);
9681 case NT_S390_SYSTEM_CALL:
9682 if (note->namesz == 6
9683 && strcmp (note->namedata, "LINUX") == 0)
9684 return elfcore_grok_s390_system_call (abfd, note);
9689 if (note->namesz == 6
9690 && strcmp (note->namedata, "LINUX") == 0)
9691 return elfcore_grok_s390_tdb (abfd, note);
9695 case NT_S390_VXRS_LOW:
9696 if (note->namesz == 6
9697 && strcmp (note->namedata, "LINUX") == 0)
9698 return elfcore_grok_s390_vxrs_low (abfd, note);
9702 case NT_S390_VXRS_HIGH:
9703 if (note->namesz == 6
9704 && strcmp (note->namedata, "LINUX") == 0)
9705 return elfcore_grok_s390_vxrs_high (abfd, note);
9710 if (note->namesz == 6
9711 && strcmp (note->namedata, "LINUX") == 0)
9712 return elfcore_grok_s390_gs_cb (abfd, note);
9717 if (note->namesz == 6
9718 && strcmp (note->namedata, "LINUX") == 0)
9719 return elfcore_grok_s390_gs_bc (abfd, note);
9724 if (note->namesz == 6
9725 && strcmp (note->namedata, "LINUX") == 0)
9726 return elfcore_grok_arm_vfp (abfd, note);
9731 if (note->namesz == 6
9732 && strcmp (note->namedata, "LINUX") == 0)
9733 return elfcore_grok_aarch_tls (abfd, note);
9737 case NT_ARM_HW_BREAK:
9738 if (note->namesz == 6
9739 && strcmp (note->namedata, "LINUX") == 0)
9740 return elfcore_grok_aarch_hw_break (abfd, note);
9744 case NT_ARM_HW_WATCH:
9745 if (note->namesz == 6
9746 && strcmp (note->namedata, "LINUX") == 0)
9747 return elfcore_grok_aarch_hw_watch (abfd, note);
9753 if (bed->elf_backend_grok_psinfo)
9754 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
9756 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
9757 return elfcore_grok_psinfo (abfd, note);
9764 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
9769 sect->size = note->descsz;
9770 sect->filepos = note->descpos;
9771 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
9777 return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.file",
9781 return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.siginfo",
9788 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
9790 struct bfd_build_id* build_id;
9792 if (note->descsz == 0)
9795 build_id = bfd_alloc (abfd, sizeof (struct bfd_build_id) - 1 + note->descsz);
9796 if (build_id == NULL)
9799 build_id->size = note->descsz;
9800 memcpy (build_id->data, note->descdata, note->descsz);
9801 abfd->build_id = build_id;
9807 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
9814 case NT_GNU_PROPERTY_TYPE_0:
9815 return _bfd_elf_parse_gnu_properties (abfd, note);
9817 case NT_GNU_BUILD_ID:
9818 return elfobj_grok_gnu_build_id (abfd, note);
9823 elfobj_grok_stapsdt_note_1 (bfd *abfd, Elf_Internal_Note *note)
9825 struct sdt_note *cur =
9826 (struct sdt_note *) bfd_alloc (abfd, sizeof (struct sdt_note)
9829 cur->next = (struct sdt_note *) (elf_tdata (abfd))->sdt_note_head;
9830 cur->size = (bfd_size_type) note->descsz;
9831 memcpy (cur->data, note->descdata, note->descsz);
9833 elf_tdata (abfd)->sdt_note_head = cur;
9839 elfobj_grok_stapsdt_note (bfd *abfd, Elf_Internal_Note *note)
9844 return elfobj_grok_stapsdt_note_1 (abfd, note);
9852 elfcore_grok_freebsd_psinfo (bfd *abfd, Elf_Internal_Note *note)
9856 switch (elf_elfheader (abfd)->e_ident[EI_CLASS])
9859 if (note->descsz < 108)
9864 if (note->descsz < 120)
9872 /* Check for version 1 in pr_version. */
9873 if (bfd_h_get_32 (abfd, (bfd_byte *) note->descdata) != 1)
9877 /* Skip over pr_psinfosz. */
9878 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS32)
9882 offset += 4; /* Padding before pr_psinfosz. */
9886 /* pr_fname is PRFNAMESZ (16) + 1 bytes in size. */
9887 elf_tdata (abfd)->core->program
9888 = _bfd_elfcore_strndup (abfd, note->descdata + offset, 17);
9891 /* pr_psargs is PRARGSZ (80) + 1 bytes in size. */
9892 elf_tdata (abfd)->core->command
9893 = _bfd_elfcore_strndup (abfd, note->descdata + offset, 81);
9896 /* Padding before pr_pid. */
9899 /* The pr_pid field was added in version "1a". */
9900 if (note->descsz < offset + 4)
9903 elf_tdata (abfd)->core->pid
9904 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
9910 elfcore_grok_freebsd_prstatus (bfd *abfd, Elf_Internal_Note *note)
9916 /* Compute offset of pr_getregsz, skipping over pr_statussz.
9917 Also compute minimum size of this note. */
9918 switch (elf_elfheader (abfd)->e_ident[EI_CLASS])
9922 min_size = offset + (4 * 2) + 4 + 4 + 4;
9926 offset = 4 + 4 + 8; /* Includes padding before pr_statussz. */
9927 min_size = offset + (8 * 2) + 4 + 4 + 4 + 4;
9934 if (note->descsz < min_size)
9937 /* Check for version 1 in pr_version. */
9938 if (bfd_h_get_32 (abfd, (bfd_byte *) note->descdata) != 1)
9941 /* Extract size of pr_reg from pr_gregsetsz. */
9942 /* Skip over pr_gregsetsz and pr_fpregsetsz. */
9943 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS32)
9945 size = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
9950 size = bfd_h_get_64 (abfd, (bfd_byte *) note->descdata + offset);
9954 /* Skip over pr_osreldate. */
9957 /* Read signal from pr_cursig. */
9958 if (elf_tdata (abfd)->core->signal == 0)
9959 elf_tdata (abfd)->core->signal
9960 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
9963 /* Read TID from pr_pid. */
9964 elf_tdata (abfd)->core->lwpid
9965 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
9968 /* Padding before pr_reg. */
9969 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS64)
9972 /* Make sure that there is enough data remaining in the note. */
9973 if ((note->descsz - offset) < size)
9976 /* Make a ".reg/999" section and a ".reg" section. */
9977 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
9978 size, note->descpos + offset);
9982 elfcore_grok_freebsd_note (bfd *abfd, Elf_Internal_Note *note)
9987 return elfcore_grok_freebsd_prstatus (abfd, note);
9990 return elfcore_grok_prfpreg (abfd, note);
9993 return elfcore_grok_freebsd_psinfo (abfd, note);
9995 case NT_FREEBSD_THRMISC:
9996 if (note->namesz == 8)
9997 return elfcore_make_note_pseudosection (abfd, ".thrmisc", note);
10001 case NT_FREEBSD_PROCSTAT_AUXV:
10003 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
10008 sect->size = note->descsz - 4;
10009 sect->filepos = note->descpos + 4;
10010 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
10015 case NT_X86_XSTATE:
10016 if (note->namesz == 8)
10017 return elfcore_grok_xstatereg (abfd, note);
10021 case NT_FREEBSD_PTLWPINFO:
10022 return elfcore_make_note_pseudosection (abfd, ".note.freebsdcore.lwpinfo",
10031 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
10035 cp = strchr (note->namedata, '@');
10038 *lwpidp = atoi(cp + 1);
10045 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
10047 /* Signal number at offset 0x08. */
10048 elf_tdata (abfd)->core->signal
10049 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
10051 /* Process ID at offset 0x50. */
10052 elf_tdata (abfd)->core->pid
10053 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
10055 /* Command name at 0x7c (max 32 bytes, including nul). */
10056 elf_tdata (abfd)->core->command
10057 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
10059 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
10064 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
10068 if (elfcore_netbsd_get_lwpid (note, &lwp))
10069 elf_tdata (abfd)->core->lwpid = lwp;
10071 if (note->type == NT_NETBSDCORE_PROCINFO)
10073 /* NetBSD-specific core "procinfo". Note that we expect to
10074 find this note before any of the others, which is fine,
10075 since the kernel writes this note out first when it
10076 creates a core file. */
10078 return elfcore_grok_netbsd_procinfo (abfd, note);
10081 /* As of Jan 2002 there are no other machine-independent notes
10082 defined for NetBSD core files. If the note type is less
10083 than the start of the machine-dependent note types, we don't
10086 if (note->type < NT_NETBSDCORE_FIRSTMACH)
10090 switch (bfd_get_arch (abfd))
10092 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
10093 PT_GETFPREGS == mach+2. */
10095 case bfd_arch_alpha:
10096 case bfd_arch_sparc:
10097 switch (note->type)
10099 case NT_NETBSDCORE_FIRSTMACH+0:
10100 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10102 case NT_NETBSDCORE_FIRSTMACH+2:
10103 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10109 /* On all other arch's, PT_GETREGS == mach+1 and
10110 PT_GETFPREGS == mach+3. */
10113 switch (note->type)
10115 case NT_NETBSDCORE_FIRSTMACH+1:
10116 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10118 case NT_NETBSDCORE_FIRSTMACH+3:
10119 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10129 elfcore_grok_openbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
10131 /* Signal number at offset 0x08. */
10132 elf_tdata (abfd)->core->signal
10133 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
10135 /* Process ID at offset 0x20. */
10136 elf_tdata (abfd)->core->pid
10137 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x20);
10139 /* Command name at 0x48 (max 32 bytes, including nul). */
10140 elf_tdata (abfd)->core->command
10141 = _bfd_elfcore_strndup (abfd, note->descdata + 0x48, 31);
10147 elfcore_grok_openbsd_note (bfd *abfd, Elf_Internal_Note *note)
10149 if (note->type == NT_OPENBSD_PROCINFO)
10150 return elfcore_grok_openbsd_procinfo (abfd, note);
10152 if (note->type == NT_OPENBSD_REGS)
10153 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10155 if (note->type == NT_OPENBSD_FPREGS)
10156 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10158 if (note->type == NT_OPENBSD_XFPREGS)
10159 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
10161 if (note->type == NT_OPENBSD_AUXV)
10163 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
10168 sect->size = note->descsz;
10169 sect->filepos = note->descpos;
10170 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
10175 if (note->type == NT_OPENBSD_WCOOKIE)
10177 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
10182 sect->size = note->descsz;
10183 sect->filepos = note->descpos;
10184 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
10193 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
10195 void *ddata = note->descdata;
10202 /* nto_procfs_status 'pid' field is at offset 0. */
10203 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
10205 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
10206 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
10208 /* nto_procfs_status 'flags' field is at offset 8. */
10209 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
10211 /* nto_procfs_status 'what' field is at offset 14. */
10212 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
10214 elf_tdata (abfd)->core->signal = sig;
10215 elf_tdata (abfd)->core->lwpid = *tid;
10218 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
10219 do not come from signals so we make sure we set the current
10220 thread just in case. */
10221 if (flags & 0x00000080)
10222 elf_tdata (abfd)->core->lwpid = *tid;
10224 /* Make a ".qnx_core_status/%d" section. */
10225 sprintf (buf, ".qnx_core_status/%ld", *tid);
10227 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
10230 strcpy (name, buf);
10232 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10236 sect->size = note->descsz;
10237 sect->filepos = note->descpos;
10238 sect->alignment_power = 2;
10240 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
10244 elfcore_grok_nto_regs (bfd *abfd,
10245 Elf_Internal_Note *note,
10253 /* Make a "(base)/%d" section. */
10254 sprintf (buf, "%s/%ld", base, tid);
10256 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
10259 strcpy (name, buf);
10261 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10265 sect->size = note->descsz;
10266 sect->filepos = note->descpos;
10267 sect->alignment_power = 2;
10269 /* This is the current thread. */
10270 if (elf_tdata (abfd)->core->lwpid == tid)
10271 return elfcore_maybe_make_sect (abfd, base, sect);
10276 #define BFD_QNT_CORE_INFO 7
10277 #define BFD_QNT_CORE_STATUS 8
10278 #define BFD_QNT_CORE_GREG 9
10279 #define BFD_QNT_CORE_FPREG 10
10282 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
10284 /* Every GREG section has a STATUS section before it. Store the
10285 tid from the previous call to pass down to the next gregs
10287 static long tid = 1;
10289 switch (note->type)
10291 case BFD_QNT_CORE_INFO:
10292 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
10293 case BFD_QNT_CORE_STATUS:
10294 return elfcore_grok_nto_status (abfd, note, &tid);
10295 case BFD_QNT_CORE_GREG:
10296 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
10297 case BFD_QNT_CORE_FPREG:
10298 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
10305 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
10311 /* Use note name as section name. */
10312 len = note->namesz;
10313 name = (char *) bfd_alloc (abfd, len);
10316 memcpy (name, note->namedata, len);
10317 name[len - 1] = '\0';
10319 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10323 sect->size = note->descsz;
10324 sect->filepos = note->descpos;
10325 sect->alignment_power = 1;
10330 /* Function: elfcore_write_note
10333 buffer to hold note, and current size of buffer
10337 size of data for note
10339 Writes note to end of buffer. ELF64 notes are written exactly as
10340 for ELF32, despite the current (as of 2006) ELF gabi specifying
10341 that they ought to have 8-byte namesz and descsz field, and have
10342 8-byte alignment. Other writers, eg. Linux kernel, do the same.
10345 Pointer to realloc'd buffer, *BUFSIZ updated. */
10348 elfcore_write_note (bfd *abfd,
10356 Elf_External_Note *xnp;
10363 namesz = strlen (name) + 1;
10365 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
10367 buf = (char *) realloc (buf, *bufsiz + newspace);
10370 dest = buf + *bufsiz;
10371 *bufsiz += newspace;
10372 xnp = (Elf_External_Note *) dest;
10373 H_PUT_32 (abfd, namesz, xnp->namesz);
10374 H_PUT_32 (abfd, size, xnp->descsz);
10375 H_PUT_32 (abfd, type, xnp->type);
10379 memcpy (dest, name, namesz);
10387 memcpy (dest, input, size);
10398 elfcore_write_prpsinfo (bfd *abfd,
10402 const char *psargs)
10404 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10406 if (bed->elf_backend_write_core_note != NULL)
10409 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
10410 NT_PRPSINFO, fname, psargs);
10415 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
10416 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
10417 if (bed->s->elfclass == ELFCLASS32)
10419 #if defined (HAVE_PSINFO32_T)
10421 int note_type = NT_PSINFO;
10424 int note_type = NT_PRPSINFO;
10427 memset (&data, 0, sizeof (data));
10428 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
10429 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
10430 return elfcore_write_note (abfd, buf, bufsiz,
10431 "CORE", note_type, &data, sizeof (data));
10436 #if defined (HAVE_PSINFO_T)
10438 int note_type = NT_PSINFO;
10441 int note_type = NT_PRPSINFO;
10444 memset (&data, 0, sizeof (data));
10445 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
10446 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
10447 return elfcore_write_note (abfd, buf, bufsiz,
10448 "CORE", note_type, &data, sizeof (data));
10450 #endif /* PSINFO_T or PRPSINFO_T */
10457 elfcore_write_linux_prpsinfo32
10458 (bfd *abfd, char *buf, int *bufsiz,
10459 const struct elf_internal_linux_prpsinfo *prpsinfo)
10461 struct elf_external_linux_prpsinfo32 data;
10463 swap_linux_prpsinfo32_out (abfd, prpsinfo, &data);
10464 return elfcore_write_note (abfd, buf, bufsiz, "CORE", NT_PRPSINFO,
10465 &data, sizeof (data));
10469 elfcore_write_linux_prpsinfo64
10470 (bfd *abfd, char *buf, int *bufsiz,
10471 const struct elf_internal_linux_prpsinfo *prpsinfo)
10473 struct elf_external_linux_prpsinfo64 data;
10475 swap_linux_prpsinfo64_out (abfd, prpsinfo, &data);
10476 return elfcore_write_note (abfd, buf, bufsiz,
10477 "CORE", NT_PRPSINFO, &data, sizeof (data));
10481 elfcore_write_prstatus (bfd *abfd,
10488 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10490 if (bed->elf_backend_write_core_note != NULL)
10493 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
10495 pid, cursig, gregs);
10500 #if defined (HAVE_PRSTATUS_T)
10501 #if defined (HAVE_PRSTATUS32_T)
10502 if (bed->s->elfclass == ELFCLASS32)
10504 prstatus32_t prstat;
10506 memset (&prstat, 0, sizeof (prstat));
10507 prstat.pr_pid = pid;
10508 prstat.pr_cursig = cursig;
10509 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
10510 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
10511 NT_PRSTATUS, &prstat, sizeof (prstat));
10518 memset (&prstat, 0, sizeof (prstat));
10519 prstat.pr_pid = pid;
10520 prstat.pr_cursig = cursig;
10521 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
10522 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
10523 NT_PRSTATUS, &prstat, sizeof (prstat));
10525 #endif /* HAVE_PRSTATUS_T */
10531 #if defined (HAVE_LWPSTATUS_T)
10533 elfcore_write_lwpstatus (bfd *abfd,
10540 lwpstatus_t lwpstat;
10541 const char *note_name = "CORE";
10543 memset (&lwpstat, 0, sizeof (lwpstat));
10544 lwpstat.pr_lwpid = pid >> 16;
10545 lwpstat.pr_cursig = cursig;
10546 #if defined (HAVE_LWPSTATUS_T_PR_REG)
10547 memcpy (&lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
10548 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
10549 #if !defined(gregs)
10550 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
10551 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
10553 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
10554 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
10557 return elfcore_write_note (abfd, buf, bufsiz, note_name,
10558 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
10560 #endif /* HAVE_LWPSTATUS_T */
10562 #if defined (HAVE_PSTATUS_T)
10564 elfcore_write_pstatus (bfd *abfd,
10568 int cursig ATTRIBUTE_UNUSED,
10569 const void *gregs ATTRIBUTE_UNUSED)
10571 const char *note_name = "CORE";
10572 #if defined (HAVE_PSTATUS32_T)
10573 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10575 if (bed->s->elfclass == ELFCLASS32)
10579 memset (&pstat, 0, sizeof (pstat));
10580 pstat.pr_pid = pid & 0xffff;
10581 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
10582 NT_PSTATUS, &pstat, sizeof (pstat));
10590 memset (&pstat, 0, sizeof (pstat));
10591 pstat.pr_pid = pid & 0xffff;
10592 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
10593 NT_PSTATUS, &pstat, sizeof (pstat));
10597 #endif /* HAVE_PSTATUS_T */
10600 elfcore_write_prfpreg (bfd *abfd,
10603 const void *fpregs,
10606 const char *note_name = "CORE";
10607 return elfcore_write_note (abfd, buf, bufsiz,
10608 note_name, NT_FPREGSET, fpregs, size);
10612 elfcore_write_prxfpreg (bfd *abfd,
10615 const void *xfpregs,
10618 char *note_name = "LINUX";
10619 return elfcore_write_note (abfd, buf, bufsiz,
10620 note_name, NT_PRXFPREG, xfpregs, size);
10624 elfcore_write_xstatereg (bfd *abfd, char *buf, int *bufsiz,
10625 const void *xfpregs, int size)
10628 if (get_elf_backend_data (abfd)->elf_osabi == ELFOSABI_FREEBSD)
10629 note_name = "FreeBSD";
10631 note_name = "LINUX";
10632 return elfcore_write_note (abfd, buf, bufsiz,
10633 note_name, NT_X86_XSTATE, xfpregs, size);
10637 elfcore_write_ppc_vmx (bfd *abfd,
10640 const void *ppc_vmx,
10643 char *note_name = "LINUX";
10644 return elfcore_write_note (abfd, buf, bufsiz,
10645 note_name, NT_PPC_VMX, ppc_vmx, size);
10649 elfcore_write_ppc_vsx (bfd *abfd,
10652 const void *ppc_vsx,
10655 char *note_name = "LINUX";
10656 return elfcore_write_note (abfd, buf, bufsiz,
10657 note_name, NT_PPC_VSX, ppc_vsx, size);
10661 elfcore_write_s390_high_gprs (bfd *abfd,
10664 const void *s390_high_gprs,
10667 char *note_name = "LINUX";
10668 return elfcore_write_note (abfd, buf, bufsiz,
10669 note_name, NT_S390_HIGH_GPRS,
10670 s390_high_gprs, size);
10674 elfcore_write_s390_timer (bfd *abfd,
10677 const void *s390_timer,
10680 char *note_name = "LINUX";
10681 return elfcore_write_note (abfd, buf, bufsiz,
10682 note_name, NT_S390_TIMER, s390_timer, size);
10686 elfcore_write_s390_todcmp (bfd *abfd,
10689 const void *s390_todcmp,
10692 char *note_name = "LINUX";
10693 return elfcore_write_note (abfd, buf, bufsiz,
10694 note_name, NT_S390_TODCMP, s390_todcmp, size);
10698 elfcore_write_s390_todpreg (bfd *abfd,
10701 const void *s390_todpreg,
10704 char *note_name = "LINUX";
10705 return elfcore_write_note (abfd, buf, bufsiz,
10706 note_name, NT_S390_TODPREG, s390_todpreg, size);
10710 elfcore_write_s390_ctrs (bfd *abfd,
10713 const void *s390_ctrs,
10716 char *note_name = "LINUX";
10717 return elfcore_write_note (abfd, buf, bufsiz,
10718 note_name, NT_S390_CTRS, s390_ctrs, size);
10722 elfcore_write_s390_prefix (bfd *abfd,
10725 const void *s390_prefix,
10728 char *note_name = "LINUX";
10729 return elfcore_write_note (abfd, buf, bufsiz,
10730 note_name, NT_S390_PREFIX, s390_prefix, size);
10734 elfcore_write_s390_last_break (bfd *abfd,
10737 const void *s390_last_break,
10740 char *note_name = "LINUX";
10741 return elfcore_write_note (abfd, buf, bufsiz,
10742 note_name, NT_S390_LAST_BREAK,
10743 s390_last_break, size);
10747 elfcore_write_s390_system_call (bfd *abfd,
10750 const void *s390_system_call,
10753 char *note_name = "LINUX";
10754 return elfcore_write_note (abfd, buf, bufsiz,
10755 note_name, NT_S390_SYSTEM_CALL,
10756 s390_system_call, size);
10760 elfcore_write_s390_tdb (bfd *abfd,
10763 const void *s390_tdb,
10766 char *note_name = "LINUX";
10767 return elfcore_write_note (abfd, buf, bufsiz,
10768 note_name, NT_S390_TDB, s390_tdb, size);
10772 elfcore_write_s390_vxrs_low (bfd *abfd,
10775 const void *s390_vxrs_low,
10778 char *note_name = "LINUX";
10779 return elfcore_write_note (abfd, buf, bufsiz,
10780 note_name, NT_S390_VXRS_LOW, s390_vxrs_low, size);
10784 elfcore_write_s390_vxrs_high (bfd *abfd,
10787 const void *s390_vxrs_high,
10790 char *note_name = "LINUX";
10791 return elfcore_write_note (abfd, buf, bufsiz,
10792 note_name, NT_S390_VXRS_HIGH,
10793 s390_vxrs_high, size);
10797 elfcore_write_s390_gs_cb (bfd *abfd,
10800 const void *s390_gs_cb,
10803 char *note_name = "LINUX";
10804 return elfcore_write_note (abfd, buf, bufsiz,
10805 note_name, NT_S390_GS_CB,
10810 elfcore_write_s390_gs_bc (bfd *abfd,
10813 const void *s390_gs_bc,
10816 char *note_name = "LINUX";
10817 return elfcore_write_note (abfd, buf, bufsiz,
10818 note_name, NT_S390_GS_BC,
10823 elfcore_write_arm_vfp (bfd *abfd,
10826 const void *arm_vfp,
10829 char *note_name = "LINUX";
10830 return elfcore_write_note (abfd, buf, bufsiz,
10831 note_name, NT_ARM_VFP, arm_vfp, size);
10835 elfcore_write_aarch_tls (bfd *abfd,
10838 const void *aarch_tls,
10841 char *note_name = "LINUX";
10842 return elfcore_write_note (abfd, buf, bufsiz,
10843 note_name, NT_ARM_TLS, aarch_tls, size);
10847 elfcore_write_aarch_hw_break (bfd *abfd,
10850 const void *aarch_hw_break,
10853 char *note_name = "LINUX";
10854 return elfcore_write_note (abfd, buf, bufsiz,
10855 note_name, NT_ARM_HW_BREAK, aarch_hw_break, size);
10859 elfcore_write_aarch_hw_watch (bfd *abfd,
10862 const void *aarch_hw_watch,
10865 char *note_name = "LINUX";
10866 return elfcore_write_note (abfd, buf, bufsiz,
10867 note_name, NT_ARM_HW_WATCH, aarch_hw_watch, size);
10871 elfcore_write_register_note (bfd *abfd,
10874 const char *section,
10878 if (strcmp (section, ".reg2") == 0)
10879 return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size);
10880 if (strcmp (section, ".reg-xfp") == 0)
10881 return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
10882 if (strcmp (section, ".reg-xstate") == 0)
10883 return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size);
10884 if (strcmp (section, ".reg-ppc-vmx") == 0)
10885 return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
10886 if (strcmp (section, ".reg-ppc-vsx") == 0)
10887 return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size);
10888 if (strcmp (section, ".reg-s390-high-gprs") == 0)
10889 return elfcore_write_s390_high_gprs (abfd, buf, bufsiz, data, size);
10890 if (strcmp (section, ".reg-s390-timer") == 0)
10891 return elfcore_write_s390_timer (abfd, buf, bufsiz, data, size);
10892 if (strcmp (section, ".reg-s390-todcmp") == 0)
10893 return elfcore_write_s390_todcmp (abfd, buf, bufsiz, data, size);
10894 if (strcmp (section, ".reg-s390-todpreg") == 0)
10895 return elfcore_write_s390_todpreg (abfd, buf, bufsiz, data, size);
10896 if (strcmp (section, ".reg-s390-ctrs") == 0)
10897 return elfcore_write_s390_ctrs (abfd, buf, bufsiz, data, size);
10898 if (strcmp (section, ".reg-s390-prefix") == 0)
10899 return elfcore_write_s390_prefix (abfd, buf, bufsiz, data, size);
10900 if (strcmp (section, ".reg-s390-last-break") == 0)
10901 return elfcore_write_s390_last_break (abfd, buf, bufsiz, data, size);
10902 if (strcmp (section, ".reg-s390-system-call") == 0)
10903 return elfcore_write_s390_system_call (abfd, buf, bufsiz, data, size);
10904 if (strcmp (section, ".reg-s390-tdb") == 0)
10905 return elfcore_write_s390_tdb (abfd, buf, bufsiz, data, size);
10906 if (strcmp (section, ".reg-s390-vxrs-low") == 0)
10907 return elfcore_write_s390_vxrs_low (abfd, buf, bufsiz, data, size);
10908 if (strcmp (section, ".reg-s390-vxrs-high") == 0)
10909 return elfcore_write_s390_vxrs_high (abfd, buf, bufsiz, data, size);
10910 if (strcmp (section, ".reg-s390-gs-cb") == 0)
10911 return elfcore_write_s390_gs_cb (abfd, buf, bufsiz, data, size);
10912 if (strcmp (section, ".reg-s390-gs-bc") == 0)
10913 return elfcore_write_s390_gs_bc (abfd, buf, bufsiz, data, size);
10914 if (strcmp (section, ".reg-arm-vfp") == 0)
10915 return elfcore_write_arm_vfp (abfd, buf, bufsiz, data, size);
10916 if (strcmp (section, ".reg-aarch-tls") == 0)
10917 return elfcore_write_aarch_tls (abfd, buf, bufsiz, data, size);
10918 if (strcmp (section, ".reg-aarch-hw-break") == 0)
10919 return elfcore_write_aarch_hw_break (abfd, buf, bufsiz, data, size);
10920 if (strcmp (section, ".reg-aarch-hw-watch") == 0)
10921 return elfcore_write_aarch_hw_watch (abfd, buf, bufsiz, data, size);
10926 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
10931 while (p < buf + size)
10933 /* FIXME: bad alignment assumption. */
10934 Elf_External_Note *xnp = (Elf_External_Note *) p;
10935 Elf_Internal_Note in;
10937 if (offsetof (Elf_External_Note, name) > buf - p + size)
10940 in.type = H_GET_32 (abfd, xnp->type);
10942 in.namesz = H_GET_32 (abfd, xnp->namesz);
10943 in.namedata = xnp->name;
10944 if (in.namesz > buf - in.namedata + size)
10947 in.descsz = H_GET_32 (abfd, xnp->descsz);
10948 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
10949 in.descpos = offset + (in.descdata - buf);
10951 && (in.descdata >= buf + size
10952 || in.descsz > buf - in.descdata + size))
10955 switch (bfd_get_format (abfd))
10962 #define GROKER_ELEMENT(S,F) {S, sizeof (S) - 1, F}
10965 const char * string;
10967 bfd_boolean (* func)(bfd *, Elf_Internal_Note *);
10971 GROKER_ELEMENT ("", elfcore_grok_note),
10972 GROKER_ELEMENT ("FreeBSD", elfcore_grok_freebsd_note),
10973 GROKER_ELEMENT ("NetBSD-CORE", elfcore_grok_netbsd_note),
10974 GROKER_ELEMENT ( "OpenBSD", elfcore_grok_openbsd_note),
10975 GROKER_ELEMENT ("QNX", elfcore_grok_nto_note),
10976 GROKER_ELEMENT ("SPU/", elfcore_grok_spu_note)
10978 #undef GROKER_ELEMENT
10981 for (i = ARRAY_SIZE (grokers); i--;)
10983 if (in.namesz >= grokers[i].len
10984 && strncmp (in.namedata, grokers[i].string,
10985 grokers[i].len) == 0)
10987 if (! grokers[i].func (abfd, & in))
10996 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
10998 if (! elfobj_grok_gnu_note (abfd, &in))
11001 else if (in.namesz == sizeof "stapsdt"
11002 && strcmp (in.namedata, "stapsdt") == 0)
11004 if (! elfobj_grok_stapsdt_note (abfd, &in))
11010 p = in.descdata + BFD_ALIGN (in.descsz, 4);
11017 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
11021 if (size == 0 || (size + 1) == 0)
11024 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
11027 buf = (char *) bfd_malloc (size + 1);
11031 /* PR 17512: file: ec08f814
11032 0-termintate the buffer so that string searches will not overflow. */
11035 if (bfd_bread (buf, size, abfd) != size
11036 || !elf_parse_notes (abfd, buf, size, offset))
11046 /* Providing external access to the ELF program header table. */
11048 /* Return an upper bound on the number of bytes required to store a
11049 copy of ABFD's program header table entries. Return -1 if an error
11050 occurs; bfd_get_error will return an appropriate code. */
11053 bfd_get_elf_phdr_upper_bound (bfd *abfd)
11055 if (abfd->xvec->flavour != bfd_target_elf_flavour)
11057 bfd_set_error (bfd_error_wrong_format);
11061 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
11064 /* Copy ABFD's program header table entries to *PHDRS. The entries
11065 will be stored as an array of Elf_Internal_Phdr structures, as
11066 defined in include/elf/internal.h. To find out how large the
11067 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
11069 Return the number of program header table entries read, or -1 if an
11070 error occurs; bfd_get_error will return an appropriate code. */
11073 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
11077 if (abfd->xvec->flavour != bfd_target_elf_flavour)
11079 bfd_set_error (bfd_error_wrong_format);
11083 num_phdrs = elf_elfheader (abfd)->e_phnum;
11084 memcpy (phdrs, elf_tdata (abfd)->phdr,
11085 num_phdrs * sizeof (Elf_Internal_Phdr));
11090 enum elf_reloc_type_class
11091 _bfd_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
11092 const asection *rel_sec ATTRIBUTE_UNUSED,
11093 const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
11095 return reloc_class_normal;
11098 /* For RELA architectures, return the relocation value for a
11099 relocation against a local symbol. */
11102 _bfd_elf_rela_local_sym (bfd *abfd,
11103 Elf_Internal_Sym *sym,
11105 Elf_Internal_Rela *rel)
11107 asection *sec = *psec;
11108 bfd_vma relocation;
11110 relocation = (sec->output_section->vma
11111 + sec->output_offset
11113 if ((sec->flags & SEC_MERGE)
11114 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
11115 && sec->sec_info_type == SEC_INFO_TYPE_MERGE)
11118 _bfd_merged_section_offset (abfd, psec,
11119 elf_section_data (sec)->sec_info,
11120 sym->st_value + rel->r_addend);
11123 /* If we have changed the section, and our original section is
11124 marked with SEC_EXCLUDE, it means that the original
11125 SEC_MERGE section has been completely subsumed in some
11126 other SEC_MERGE section. In this case, we need to leave
11127 some info around for --emit-relocs. */
11128 if ((sec->flags & SEC_EXCLUDE) != 0)
11129 sec->kept_section = *psec;
11132 rel->r_addend -= relocation;
11133 rel->r_addend += sec->output_section->vma + sec->output_offset;
11139 _bfd_elf_rel_local_sym (bfd *abfd,
11140 Elf_Internal_Sym *sym,
11144 asection *sec = *psec;
11146 if (sec->sec_info_type != SEC_INFO_TYPE_MERGE)
11147 return sym->st_value + addend;
11149 return _bfd_merged_section_offset (abfd, psec,
11150 elf_section_data (sec)->sec_info,
11151 sym->st_value + addend);
11154 /* Adjust an address within a section. Given OFFSET within SEC, return
11155 the new offset within the section, based upon changes made to the
11156 section. Returns -1 if the offset is now invalid.
11157 The offset (in abnd out) is in target sized bytes, however big a
11161 _bfd_elf_section_offset (bfd *abfd,
11162 struct bfd_link_info *info,
11166 switch (sec->sec_info_type)
11168 case SEC_INFO_TYPE_STABS:
11169 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
11171 case SEC_INFO_TYPE_EH_FRAME:
11172 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
11175 if ((sec->flags & SEC_ELF_REVERSE_COPY) != 0)
11177 /* Reverse the offset. */
11178 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
11179 bfd_size_type address_size = bed->s->arch_size / 8;
11181 /* address_size and sec->size are in octets. Convert
11182 to bytes before subtracting the original offset. */
11183 offset = (sec->size - address_size) / bfd_octets_per_byte (abfd) - offset;
11189 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
11190 reconstruct an ELF file by reading the segments out of remote memory
11191 based on the ELF file header at EHDR_VMA and the ELF program headers it
11192 points to. If not null, *LOADBASEP is filled in with the difference
11193 between the VMAs from which the segments were read, and the VMAs the
11194 file headers (and hence BFD's idea of each section's VMA) put them at.
11196 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
11197 remote memory at target address VMA into the local buffer at MYADDR; it
11198 should return zero on success or an `errno' code on failure. TEMPL must
11199 be a BFD for an ELF target with the word size and byte order found in
11200 the remote memory. */
11203 bfd_elf_bfd_from_remote_memory
11206 bfd_size_type size,
11207 bfd_vma *loadbasep,
11208 int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type))
11210 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
11211 (templ, ehdr_vma, size, loadbasep, target_read_memory);
11215 _bfd_elf_get_synthetic_symtab (bfd *abfd,
11216 long symcount ATTRIBUTE_UNUSED,
11217 asymbol **syms ATTRIBUTE_UNUSED,
11222 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
11225 const char *relplt_name;
11226 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
11230 Elf_Internal_Shdr *hdr;
11236 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
11239 if (dynsymcount <= 0)
11242 if (!bed->plt_sym_val)
11245 relplt_name = bed->relplt_name;
11246 if (relplt_name == NULL)
11247 relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt";
11248 relplt = bfd_get_section_by_name (abfd, relplt_name);
11249 if (relplt == NULL)
11252 hdr = &elf_section_data (relplt)->this_hdr;
11253 if (hdr->sh_link != elf_dynsymtab (abfd)
11254 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
11257 plt = bfd_get_section_by_name (abfd, ".plt");
11261 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
11262 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
11265 count = relplt->size / hdr->sh_entsize;
11266 size = count * sizeof (asymbol);
11267 p = relplt->relocation;
11268 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
11270 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
11271 if (p->addend != 0)
11274 size += sizeof ("+0x") - 1 + 8 + 8 * (bed->s->elfclass == ELFCLASS64);
11276 size += sizeof ("+0x") - 1 + 8;
11281 s = *ret = (asymbol *) bfd_malloc (size);
11285 names = (char *) (s + count);
11286 p = relplt->relocation;
11288 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
11293 addr = bed->plt_sym_val (i, plt, p);
11294 if (addr == (bfd_vma) -1)
11297 *s = **p->sym_ptr_ptr;
11298 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
11299 we are defining a symbol, ensure one of them is set. */
11300 if ((s->flags & BSF_LOCAL) == 0)
11301 s->flags |= BSF_GLOBAL;
11302 s->flags |= BSF_SYNTHETIC;
11304 s->value = addr - plt->vma;
11307 len = strlen ((*p->sym_ptr_ptr)->name);
11308 memcpy (names, (*p->sym_ptr_ptr)->name, len);
11310 if (p->addend != 0)
11314 memcpy (names, "+0x", sizeof ("+0x") - 1);
11315 names += sizeof ("+0x") - 1;
11316 bfd_sprintf_vma (abfd, buf, p->addend);
11317 for (a = buf; *a == '0'; ++a)
11320 memcpy (names, a, len);
11323 memcpy (names, "@plt", sizeof ("@plt"));
11324 names += sizeof ("@plt");
11331 /* It is only used by x86-64 so far.
11332 ??? This repeats *COM* id of zero. sec->id is supposed to be unique,
11333 but current usage would allow all of _bfd_std_section to be zero. */
11334 static const asymbol lcomm_sym
11335 = GLOBAL_SYM_INIT ("LARGE_COMMON", &_bfd_elf_large_com_section);
11336 asection _bfd_elf_large_com_section
11337 = BFD_FAKE_SECTION (_bfd_elf_large_com_section, &lcomm_sym,
11338 "LARGE_COMMON", 0, SEC_IS_COMMON);
11341 _bfd_elf_post_process_headers (bfd * abfd,
11342 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
11344 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
11346 i_ehdrp = elf_elfheader (abfd);
11348 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
11350 /* To make things simpler for the loader on Linux systems we set the
11351 osabi field to ELFOSABI_GNU if the binary contains symbols of
11352 the STT_GNU_IFUNC type or STB_GNU_UNIQUE binding. */
11353 if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE
11354 && elf_tdata (abfd)->has_gnu_symbols)
11355 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_GNU;
11359 /* Return TRUE for ELF symbol types that represent functions.
11360 This is the default version of this function, which is sufficient for
11361 most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */
11364 _bfd_elf_is_function_type (unsigned int type)
11366 return (type == STT_FUNC
11367 || type == STT_GNU_IFUNC);
11370 /* If the ELF symbol SYM might be a function in SEC, return the
11371 function size and set *CODE_OFF to the function's entry point,
11372 otherwise return zero. */
11375 _bfd_elf_maybe_function_sym (const asymbol *sym, asection *sec,
11378 bfd_size_type size;
11380 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
11381 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0
11382 || sym->section != sec)
11385 *code_off = sym->value;
11387 if (!(sym->flags & BSF_SYNTHETIC))
11388 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;