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 n_elt = shdr->sh_size / 4;
753 /* Look through this group's sections to see if current
754 section is a member. */
756 if ((++idx)->shdr == hdr)
760 /* We are a member of this group. Go looking through
761 other members to see if any others are linked via
763 idx = (Elf_Internal_Group *) shdr->contents;
764 n_elt = shdr->sh_size / 4;
766 if ((s = (++idx)->shdr->bfd_section) != NULL
767 && elf_next_in_group (s) != NULL)
771 /* Snarf the group name from other member, and
772 insert current section in circular list. */
773 elf_group_name (newsect) = elf_group_name (s);
774 elf_next_in_group (newsect) = elf_next_in_group (s);
775 elf_next_in_group (s) = newsect;
781 gname = group_signature (abfd, shdr);
784 elf_group_name (newsect) = gname;
786 /* Start a circular list with one element. */
787 elf_next_in_group (newsect) = newsect;
790 /* If the group section has been created, point to the
792 if (shdr->bfd_section != NULL)
793 elf_next_in_group (shdr->bfd_section) = newsect;
801 if (elf_group_name (newsect) == NULL)
803 /* xgettext:c-format */
804 _bfd_error_handler (_("%B: no group info for section %A"),
812 _bfd_elf_setup_sections (bfd *abfd)
815 unsigned int num_group = elf_tdata (abfd)->num_group;
816 bfd_boolean result = TRUE;
819 /* Process SHF_LINK_ORDER. */
820 for (s = abfd->sections; s != NULL; s = s->next)
822 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
823 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
825 unsigned int elfsec = this_hdr->sh_link;
826 /* FIXME: The old Intel compiler and old strip/objcopy may
827 not set the sh_link or sh_info fields. Hence we could
828 get the situation where elfsec is 0. */
831 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
832 if (bed->link_order_error_handler)
833 bed->link_order_error_handler
834 /* xgettext:c-format */
835 (_("%B: warning: sh_link not set for section `%A'"),
840 asection *linksec = NULL;
842 if (elfsec < elf_numsections (abfd))
844 this_hdr = elf_elfsections (abfd)[elfsec];
845 linksec = this_hdr->bfd_section;
849 Some strip/objcopy may leave an incorrect value in
850 sh_link. We don't want to proceed. */
854 /* xgettext:c-format */
855 (_("%B: sh_link [%d] in section `%A' is incorrect"),
856 s->owner, elfsec, s);
860 elf_linked_to_section (s) = linksec;
863 else if (this_hdr->sh_type == SHT_GROUP
864 && elf_next_in_group (s) == NULL)
867 /* xgettext:c-format */
868 (_("%B: SHT_GROUP section [index %d] has no SHF_GROUP sections"),
869 abfd, elf_section_data (s)->this_idx);
874 /* Process section groups. */
875 if (num_group == (unsigned) -1)
878 for (i = 0; i < num_group; i++)
880 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
881 Elf_Internal_Group *idx;
884 /* PR binutils/18758: Beware of corrupt binaries with invalid group data. */
885 if (shdr == NULL || shdr->bfd_section == NULL || shdr->contents == NULL)
888 /* xgettext:c-format */
889 (_("%B: section group entry number %u is corrupt"),
895 idx = (Elf_Internal_Group *) shdr->contents;
896 n_elt = shdr->sh_size / 4;
899 if ((++idx)->shdr->bfd_section)
900 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
901 else if (idx->shdr->sh_type == SHT_RELA
902 || idx->shdr->sh_type == SHT_REL)
903 /* We won't include relocation sections in section groups in
904 output object files. We adjust the group section size here
905 so that relocatable link will work correctly when
906 relocation sections are in section group in input object
908 shdr->bfd_section->size -= 4;
911 /* There are some unknown sections in the group. */
913 /* xgettext:c-format */
914 (_("%B: unknown type [%#x] section `%s' in group [%A]"),
917 bfd_elf_string_from_elf_section (abfd,
918 (elf_elfheader (abfd)
929 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
931 return elf_next_in_group (sec) != NULL;
935 convert_debug_to_zdebug (bfd *abfd, const char *name)
937 unsigned int len = strlen (name);
938 char *new_name = bfd_alloc (abfd, len + 2);
939 if (new_name == NULL)
943 memcpy (new_name + 2, name + 1, len);
948 convert_zdebug_to_debug (bfd *abfd, const char *name)
950 unsigned int len = strlen (name);
951 char *new_name = bfd_alloc (abfd, len);
952 if (new_name == NULL)
955 memcpy (new_name + 1, name + 2, len - 1);
959 /* Make a BFD section from an ELF section. We store a pointer to the
960 BFD section in the bfd_section field of the header. */
963 _bfd_elf_make_section_from_shdr (bfd *abfd,
964 Elf_Internal_Shdr *hdr,
970 const struct elf_backend_data *bed;
972 if (hdr->bfd_section != NULL)
975 newsect = bfd_make_section_anyway (abfd, name);
979 hdr->bfd_section = newsect;
980 elf_section_data (newsect)->this_hdr = *hdr;
981 elf_section_data (newsect)->this_idx = shindex;
983 /* Always use the real type/flags. */
984 elf_section_type (newsect) = hdr->sh_type;
985 elf_section_flags (newsect) = hdr->sh_flags;
987 newsect->filepos = hdr->sh_offset;
989 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
990 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
991 || ! bfd_set_section_alignment (abfd, newsect,
992 bfd_log2 (hdr->sh_addralign)))
995 flags = SEC_NO_FLAGS;
996 if (hdr->sh_type != SHT_NOBITS)
997 flags |= SEC_HAS_CONTENTS;
998 if (hdr->sh_type == SHT_GROUP)
1000 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1003 if (hdr->sh_type != SHT_NOBITS)
1006 if ((hdr->sh_flags & SHF_WRITE) == 0)
1007 flags |= SEC_READONLY;
1008 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
1010 else if ((flags & SEC_LOAD) != 0)
1012 if ((hdr->sh_flags & SHF_MERGE) != 0)
1015 newsect->entsize = hdr->sh_entsize;
1017 if ((hdr->sh_flags & SHF_STRINGS) != 0)
1018 flags |= SEC_STRINGS;
1019 if (hdr->sh_flags & SHF_GROUP)
1020 if (!setup_group (abfd, hdr, newsect))
1022 if ((hdr->sh_flags & SHF_TLS) != 0)
1023 flags |= SEC_THREAD_LOCAL;
1024 if ((hdr->sh_flags & SHF_EXCLUDE) != 0)
1025 flags |= SEC_EXCLUDE;
1027 if ((flags & SEC_ALLOC) == 0)
1029 /* The debugging sections appear to be recognized only by name,
1030 not any sort of flag. Their SEC_ALLOC bits are cleared. */
1031 if (name [0] == '.')
1036 p = ".debug", n = 6;
1037 else if (name[1] == 'g' && name[2] == 'n')
1038 p = ".gnu.linkonce.wi.", n = 17;
1039 else if (name[1] == 'g' && name[2] == 'd')
1040 p = ".gdb_index", n = 11; /* yes we really do mean 11. */
1041 else if (name[1] == 'l')
1043 else if (name[1] == 's')
1045 else if (name[1] == 'z')
1046 p = ".zdebug", n = 7;
1049 if (p != NULL && strncmp (name, p, n) == 0)
1050 flags |= SEC_DEBUGGING;
1054 /* As a GNU extension, if the name begins with .gnu.linkonce, we
1055 only link a single copy of the section. This is used to support
1056 g++. g++ will emit each template expansion in its own section.
1057 The symbols will be defined as weak, so that multiple definitions
1058 are permitted. The GNU linker extension is to actually discard
1059 all but one of the sections. */
1060 if (CONST_STRNEQ (name, ".gnu.linkonce")
1061 && elf_next_in_group (newsect) == NULL)
1062 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1064 bed = get_elf_backend_data (abfd);
1065 if (bed->elf_backend_section_flags)
1066 if (! bed->elf_backend_section_flags (&flags, hdr))
1069 if (! bfd_set_section_flags (abfd, newsect, flags))
1072 /* We do not parse the PT_NOTE segments as we are interested even in the
1073 separate debug info files which may have the segments offsets corrupted.
1074 PT_NOTEs from the core files are currently not parsed using BFD. */
1075 if (hdr->sh_type == SHT_NOTE)
1079 if (!bfd_malloc_and_get_section (abfd, newsect, &contents))
1082 elf_parse_notes (abfd, (char *) contents, hdr->sh_size, hdr->sh_offset);
1086 if ((flags & SEC_ALLOC) != 0)
1088 Elf_Internal_Phdr *phdr;
1089 unsigned int i, nload;
1091 /* Some ELF linkers produce binaries with all the program header
1092 p_paddr fields zero. If we have such a binary with more than
1093 one PT_LOAD header, then leave the section lma equal to vma
1094 so that we don't create sections with overlapping lma. */
1095 phdr = elf_tdata (abfd)->phdr;
1096 for (nload = 0, i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
1097 if (phdr->p_paddr != 0)
1099 else if (phdr->p_type == PT_LOAD && phdr->p_memsz != 0)
1101 if (i >= elf_elfheader (abfd)->e_phnum && nload > 1)
1104 phdr = elf_tdata (abfd)->phdr;
1105 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
1107 if (((phdr->p_type == PT_LOAD
1108 && (hdr->sh_flags & SHF_TLS) == 0)
1109 || phdr->p_type == PT_TLS)
1110 && ELF_SECTION_IN_SEGMENT (hdr, phdr))
1112 if ((flags & SEC_LOAD) == 0)
1113 newsect->lma = (phdr->p_paddr
1114 + hdr->sh_addr - phdr->p_vaddr);
1116 /* We used to use the same adjustment for SEC_LOAD
1117 sections, but that doesn't work if the segment
1118 is packed with code from multiple VMAs.
1119 Instead we calculate the section LMA based on
1120 the segment LMA. It is assumed that the
1121 segment will contain sections with contiguous
1122 LMAs, even if the VMAs are not. */
1123 newsect->lma = (phdr->p_paddr
1124 + hdr->sh_offset - phdr->p_offset);
1126 /* With contiguous segments, we can't tell from file
1127 offsets whether a section with zero size should
1128 be placed at the end of one segment or the
1129 beginning of the next. Decide based on vaddr. */
1130 if (hdr->sh_addr >= phdr->p_vaddr
1131 && (hdr->sh_addr + hdr->sh_size
1132 <= phdr->p_vaddr + phdr->p_memsz))
1138 /* Compress/decompress DWARF debug sections with names: .debug_* and
1139 .zdebug_*, after the section flags is set. */
1140 if ((flags & SEC_DEBUGGING)
1141 && ((name[1] == 'd' && name[6] == '_')
1142 || (name[1] == 'z' && name[7] == '_')))
1144 enum { nothing, compress, decompress } action = nothing;
1145 int compression_header_size;
1146 bfd_size_type uncompressed_size;
1147 bfd_boolean compressed
1148 = bfd_is_section_compressed_with_header (abfd, newsect,
1149 &compression_header_size,
1150 &uncompressed_size);
1154 /* Compressed section. Check if we should decompress. */
1155 if ((abfd->flags & BFD_DECOMPRESS))
1156 action = decompress;
1159 /* Compress the uncompressed section or convert from/to .zdebug*
1160 section. Check if we should compress. */
1161 if (action == nothing)
1163 if (newsect->size != 0
1164 && (abfd->flags & BFD_COMPRESS)
1165 && compression_header_size >= 0
1166 && uncompressed_size > 0
1168 || ((compression_header_size > 0)
1169 != ((abfd->flags & BFD_COMPRESS_GABI) != 0))))
1175 if (action == compress)
1177 if (!bfd_init_section_compress_status (abfd, newsect))
1180 /* xgettext:c-format */
1181 (_("%B: unable to initialize compress status for section %s"),
1188 if (!bfd_init_section_decompress_status (abfd, newsect))
1191 /* xgettext:c-format */
1192 (_("%B: unable to initialize decompress status for section %s"),
1198 if (abfd->is_linker_input)
1201 && (action == decompress
1202 || (action == compress
1203 && (abfd->flags & BFD_COMPRESS_GABI) != 0)))
1205 /* Convert section name from .zdebug_* to .debug_* so
1206 that linker will consider this section as a debug
1208 char *new_name = convert_zdebug_to_debug (abfd, name);
1209 if (new_name == NULL)
1211 bfd_rename_section (abfd, newsect, new_name);
1215 /* For objdump, don't rename the section. For objcopy, delay
1216 section rename to elf_fake_sections. */
1217 newsect->flags |= SEC_ELF_RENAME;
1223 const char *const bfd_elf_section_type_names[] =
1225 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1226 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1227 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1230 /* ELF relocs are against symbols. If we are producing relocatable
1231 output, and the reloc is against an external symbol, and nothing
1232 has given us any additional addend, the resulting reloc will also
1233 be against the same symbol. In such a case, we don't want to
1234 change anything about the way the reloc is handled, since it will
1235 all be done at final link time. Rather than put special case code
1236 into bfd_perform_relocation, all the reloc types use this howto
1237 function. It just short circuits the reloc if producing
1238 relocatable output against an external symbol. */
1240 bfd_reloc_status_type
1241 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1242 arelent *reloc_entry,
1244 void *data ATTRIBUTE_UNUSED,
1245 asection *input_section,
1247 char **error_message ATTRIBUTE_UNUSED)
1249 if (output_bfd != NULL
1250 && (symbol->flags & BSF_SECTION_SYM) == 0
1251 && (! reloc_entry->howto->partial_inplace
1252 || reloc_entry->addend == 0))
1254 reloc_entry->address += input_section->output_offset;
1255 return bfd_reloc_ok;
1258 return bfd_reloc_continue;
1261 /* Returns TRUE if section A matches section B.
1262 Names, addresses and links may be different, but everything else
1263 should be the same. */
1266 section_match (const Elf_Internal_Shdr * a,
1267 const Elf_Internal_Shdr * b)
1270 a->sh_type == b->sh_type
1271 && (a->sh_flags & ~ SHF_INFO_LINK)
1272 == (b->sh_flags & ~ SHF_INFO_LINK)
1273 && a->sh_addralign == b->sh_addralign
1274 && a->sh_size == b->sh_size
1275 && a->sh_entsize == b->sh_entsize
1276 /* FIXME: Check sh_addr ? */
1280 /* Find a section in OBFD that has the same characteristics
1281 as IHEADER. Return the index of this section or SHN_UNDEF if
1282 none can be found. Check's section HINT first, as this is likely
1283 to be the correct section. */
1286 find_link (const bfd *obfd, const Elf_Internal_Shdr *iheader,
1287 const unsigned int hint)
1289 Elf_Internal_Shdr ** oheaders = elf_elfsections (obfd);
1292 BFD_ASSERT (iheader != NULL);
1294 /* See PR 20922 for a reproducer of the NULL test. */
1295 if (hint < elf_numsections (obfd)
1296 && oheaders[hint] != NULL
1297 && section_match (oheaders[hint], iheader))
1300 for (i = 1; i < elf_numsections (obfd); i++)
1302 Elf_Internal_Shdr * oheader = oheaders[i];
1304 if (oheader == NULL)
1306 if (section_match (oheader, iheader))
1307 /* FIXME: Do we care if there is a potential for
1308 multiple matches ? */
1315 /* PR 19938: Attempt to set the ELF section header fields of an OS or
1316 Processor specific section, based upon a matching input section.
1317 Returns TRUE upon success, FALSE otherwise. */
1320 copy_special_section_fields (const bfd *ibfd,
1322 const Elf_Internal_Shdr *iheader,
1323 Elf_Internal_Shdr *oheader,
1324 const unsigned int secnum)
1326 const struct elf_backend_data *bed = get_elf_backend_data (obfd);
1327 const Elf_Internal_Shdr **iheaders = (const Elf_Internal_Shdr **) elf_elfsections (ibfd);
1328 bfd_boolean changed = FALSE;
1329 unsigned int sh_link;
1331 if (oheader->sh_type == SHT_NOBITS)
1333 /* This is a feature for objcopy --only-keep-debug:
1334 When a section's type is changed to NOBITS, we preserve
1335 the sh_link and sh_info fields so that they can be
1336 matched up with the original.
1338 Note: Strictly speaking these assignments are wrong.
1339 The sh_link and sh_info fields should point to the
1340 relevent sections in the output BFD, which may not be in
1341 the same location as they were in the input BFD. But
1342 the whole point of this action is to preserve the
1343 original values of the sh_link and sh_info fields, so
1344 that they can be matched up with the section headers in
1345 the original file. So strictly speaking we may be
1346 creating an invalid ELF file, but it is only for a file
1347 that just contains debug info and only for sections
1348 without any contents. */
1349 if (oheader->sh_link == 0)
1350 oheader->sh_link = iheader->sh_link;
1351 if (oheader->sh_info == 0)
1352 oheader->sh_info = iheader->sh_info;
1356 /* Allow the target a chance to decide how these fields should be set. */
1357 if (bed->elf_backend_copy_special_section_fields != NULL
1358 && bed->elf_backend_copy_special_section_fields
1359 (ibfd, obfd, iheader, oheader))
1362 /* We have an iheader which might match oheader, and which has non-zero
1363 sh_info and/or sh_link fields. Attempt to follow those links and find
1364 the section in the output bfd which corresponds to the linked section
1365 in the input bfd. */
1366 if (iheader->sh_link != SHN_UNDEF)
1368 /* See PR 20931 for a reproducer. */
1369 if (iheader->sh_link >= elf_numsections (ibfd))
1372 /* xgettext:c-format */
1373 (_("%B: Invalid sh_link field (%d) in section number %d"),
1374 ibfd, iheader->sh_link, secnum);
1378 sh_link = find_link (obfd, iheaders[iheader->sh_link], iheader->sh_link);
1379 if (sh_link != SHN_UNDEF)
1381 oheader->sh_link = sh_link;
1385 /* FIXME: Should we install iheader->sh_link
1386 if we could not find a match ? */
1388 /* xgettext:c-format */
1389 (_("%B: Failed to find link section for section %d"), obfd, secnum);
1392 if (iheader->sh_info)
1394 /* The sh_info field can hold arbitrary information, but if the
1395 SHF_LINK_INFO flag is set then it should be interpreted as a
1397 if (iheader->sh_flags & SHF_INFO_LINK)
1399 sh_link = find_link (obfd, iheaders[iheader->sh_info],
1401 if (sh_link != SHN_UNDEF)
1402 oheader->sh_flags |= SHF_INFO_LINK;
1405 /* No idea what it means - just copy it. */
1406 sh_link = iheader->sh_info;
1408 if (sh_link != SHN_UNDEF)
1410 oheader->sh_info = sh_link;
1415 /* xgettext:c-format */
1416 (_("%B: Failed to find info section for section %d"), obfd, secnum);
1422 /* Copy the program header and other data from one object module to
1426 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1428 const Elf_Internal_Shdr **iheaders = (const Elf_Internal_Shdr **) elf_elfsections (ibfd);
1429 Elf_Internal_Shdr **oheaders = elf_elfsections (obfd);
1430 const struct elf_backend_data *bed;
1433 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1434 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1437 if (!elf_flags_init (obfd))
1439 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1440 elf_flags_init (obfd) = TRUE;
1443 elf_gp (obfd) = elf_gp (ibfd);
1445 /* Also copy the EI_OSABI field. */
1446 elf_elfheader (obfd)->e_ident[EI_OSABI] =
1447 elf_elfheader (ibfd)->e_ident[EI_OSABI];
1449 /* If set, copy the EI_ABIVERSION field. */
1450 if (elf_elfheader (ibfd)->e_ident[EI_ABIVERSION])
1451 elf_elfheader (obfd)->e_ident[EI_ABIVERSION]
1452 = elf_elfheader (ibfd)->e_ident[EI_ABIVERSION];
1454 /* Copy object attributes. */
1455 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1457 if (iheaders == NULL || oheaders == NULL)
1460 bed = get_elf_backend_data (obfd);
1462 /* Possibly copy other fields in the section header. */
1463 for (i = 1; i < elf_numsections (obfd); i++)
1466 Elf_Internal_Shdr * oheader = oheaders[i];
1468 /* Ignore ordinary sections. SHT_NOBITS sections are considered however
1469 because of a special case need for generating separate debug info
1470 files. See below for more details. */
1472 || (oheader->sh_type != SHT_NOBITS
1473 && oheader->sh_type < SHT_LOOS))
1476 /* Ignore empty sections, and sections whose
1477 fields have already been initialised. */
1478 if (oheader->sh_size == 0
1479 || (oheader->sh_info != 0 && oheader->sh_link != 0))
1482 /* Scan for the matching section in the input bfd.
1483 First we try for a direct mapping between the input and output sections. */
1484 for (j = 1; j < elf_numsections (ibfd); j++)
1486 const Elf_Internal_Shdr * iheader = iheaders[j];
1488 if (iheader == NULL)
1491 if (oheader->bfd_section != NULL
1492 && iheader->bfd_section != NULL
1493 && iheader->bfd_section->output_section != NULL
1494 && iheader->bfd_section->output_section == oheader->bfd_section)
1496 /* We have found a connection from the input section to the
1497 output section. Attempt to copy the header fields. If
1498 this fails then do not try any further sections - there
1499 should only be a one-to-one mapping between input and output. */
1500 if (! copy_special_section_fields (ibfd, obfd, iheader, oheader, i))
1501 j = elf_numsections (ibfd);
1506 if (j < elf_numsections (ibfd))
1509 /* That failed. So try to deduce the corresponding input section.
1510 Unfortunately we cannot compare names as the output string table
1511 is empty, so instead we check size, address and type. */
1512 for (j = 1; j < elf_numsections (ibfd); j++)
1514 const Elf_Internal_Shdr * iheader = iheaders[j];
1516 if (iheader == NULL)
1519 /* Try matching fields in the input section's header.
1520 Since --only-keep-debug turns all non-debug sections into
1521 SHT_NOBITS sections, the output SHT_NOBITS type matches any
1523 if ((oheader->sh_type == SHT_NOBITS
1524 || iheader->sh_type == oheader->sh_type)
1525 && (iheader->sh_flags & ~ SHF_INFO_LINK)
1526 == (oheader->sh_flags & ~ SHF_INFO_LINK)
1527 && iheader->sh_addralign == oheader->sh_addralign
1528 && iheader->sh_entsize == oheader->sh_entsize
1529 && iheader->sh_size == oheader->sh_size
1530 && iheader->sh_addr == oheader->sh_addr
1531 && (iheader->sh_info != oheader->sh_info
1532 || iheader->sh_link != oheader->sh_link))
1534 if (copy_special_section_fields (ibfd, obfd, iheader, oheader, i))
1539 if (j == elf_numsections (ibfd) && oheader->sh_type >= SHT_LOOS)
1541 /* Final attempt. Call the backend copy function
1542 with a NULL input section. */
1543 if (bed->elf_backend_copy_special_section_fields != NULL)
1544 bed->elf_backend_copy_special_section_fields (ibfd, obfd, NULL, oheader);
1552 get_segment_type (unsigned int p_type)
1557 case PT_NULL: pt = "NULL"; break;
1558 case PT_LOAD: pt = "LOAD"; break;
1559 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1560 case PT_INTERP: pt = "INTERP"; break;
1561 case PT_NOTE: pt = "NOTE"; break;
1562 case PT_SHLIB: pt = "SHLIB"; break;
1563 case PT_PHDR: pt = "PHDR"; break;
1564 case PT_TLS: pt = "TLS"; break;
1565 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1566 case PT_GNU_STACK: pt = "STACK"; break;
1567 case PT_GNU_RELRO: pt = "RELRO"; break;
1568 default: pt = NULL; break;
1573 /* Print out the program headers. */
1576 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1578 FILE *f = (FILE *) farg;
1579 Elf_Internal_Phdr *p;
1581 bfd_byte *dynbuf = NULL;
1583 p = elf_tdata (abfd)->phdr;
1588 fprintf (f, _("\nProgram Header:\n"));
1589 c = elf_elfheader (abfd)->e_phnum;
1590 for (i = 0; i < c; i++, p++)
1592 const char *pt = get_segment_type (p->p_type);
1597 sprintf (buf, "0x%lx", p->p_type);
1600 fprintf (f, "%8s off 0x", pt);
1601 bfd_fprintf_vma (abfd, f, p->p_offset);
1602 fprintf (f, " vaddr 0x");
1603 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1604 fprintf (f, " paddr 0x");
1605 bfd_fprintf_vma (abfd, f, p->p_paddr);
1606 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1607 fprintf (f, " filesz 0x");
1608 bfd_fprintf_vma (abfd, f, p->p_filesz);
1609 fprintf (f, " memsz 0x");
1610 bfd_fprintf_vma (abfd, f, p->p_memsz);
1611 fprintf (f, " flags %c%c%c",
1612 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1613 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1614 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1615 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1616 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1621 s = bfd_get_section_by_name (abfd, ".dynamic");
1624 unsigned int elfsec;
1625 unsigned long shlink;
1626 bfd_byte *extdyn, *extdynend;
1628 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1630 fprintf (f, _("\nDynamic Section:\n"));
1632 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1635 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1636 if (elfsec == SHN_BAD)
1638 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1640 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1641 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1644 /* PR 17512: file: 6f427532. */
1645 if (s->size < extdynsize)
1647 extdynend = extdyn + s->size;
1648 /* PR 17512: file: id:000006,sig:06,src:000000,op:flip4,pos:5664.
1650 for (; extdyn <= (extdynend - extdynsize); extdyn += extdynsize)
1652 Elf_Internal_Dyn dyn;
1653 const char *name = "";
1655 bfd_boolean stringp;
1656 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1658 (*swap_dyn_in) (abfd, extdyn, &dyn);
1660 if (dyn.d_tag == DT_NULL)
1667 if (bed->elf_backend_get_target_dtag)
1668 name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag);
1670 if (!strcmp (name, ""))
1672 sprintf (ab, "%#" BFD_VMA_FMT "x", dyn.d_tag);
1677 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1678 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1679 case DT_PLTGOT: name = "PLTGOT"; break;
1680 case DT_HASH: name = "HASH"; break;
1681 case DT_STRTAB: name = "STRTAB"; break;
1682 case DT_SYMTAB: name = "SYMTAB"; break;
1683 case DT_RELA: name = "RELA"; break;
1684 case DT_RELASZ: name = "RELASZ"; break;
1685 case DT_RELAENT: name = "RELAENT"; break;
1686 case DT_STRSZ: name = "STRSZ"; break;
1687 case DT_SYMENT: name = "SYMENT"; break;
1688 case DT_INIT: name = "INIT"; break;
1689 case DT_FINI: name = "FINI"; break;
1690 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1691 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1692 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1693 case DT_REL: name = "REL"; break;
1694 case DT_RELSZ: name = "RELSZ"; break;
1695 case DT_RELENT: name = "RELENT"; break;
1696 case DT_PLTREL: name = "PLTREL"; break;
1697 case DT_DEBUG: name = "DEBUG"; break;
1698 case DT_TEXTREL: name = "TEXTREL"; break;
1699 case DT_JMPREL: name = "JMPREL"; break;
1700 case DT_BIND_NOW: name = "BIND_NOW"; break;
1701 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1702 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1703 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1704 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1705 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1706 case DT_FLAGS: name = "FLAGS"; break;
1707 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1708 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1709 case DT_CHECKSUM: name = "CHECKSUM"; break;
1710 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1711 case DT_MOVEENT: name = "MOVEENT"; break;
1712 case DT_MOVESZ: name = "MOVESZ"; break;
1713 case DT_FEATURE: name = "FEATURE"; break;
1714 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1715 case DT_SYMINSZ: name = "SYMINSZ"; break;
1716 case DT_SYMINENT: name = "SYMINENT"; break;
1717 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1718 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1719 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1720 case DT_PLTPAD: name = "PLTPAD"; break;
1721 case DT_MOVETAB: name = "MOVETAB"; break;
1722 case DT_SYMINFO: name = "SYMINFO"; break;
1723 case DT_RELACOUNT: name = "RELACOUNT"; break;
1724 case DT_RELCOUNT: name = "RELCOUNT"; break;
1725 case DT_FLAGS_1: name = "FLAGS_1"; break;
1726 case DT_VERSYM: name = "VERSYM"; break;
1727 case DT_VERDEF: name = "VERDEF"; break;
1728 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1729 case DT_VERNEED: name = "VERNEED"; break;
1730 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1731 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1732 case DT_USED: name = "USED"; break;
1733 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1734 case DT_GNU_HASH: name = "GNU_HASH"; break;
1737 fprintf (f, " %-20s ", name);
1741 bfd_fprintf_vma (abfd, f, dyn.d_un.d_val);
1746 unsigned int tagv = dyn.d_un.d_val;
1748 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1751 fprintf (f, "%s", string);
1760 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1761 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1763 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1767 if (elf_dynverdef (abfd) != 0)
1769 Elf_Internal_Verdef *t;
1771 fprintf (f, _("\nVersion definitions:\n"));
1772 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1774 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1775 t->vd_flags, t->vd_hash,
1776 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1777 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1779 Elf_Internal_Verdaux *a;
1782 for (a = t->vd_auxptr->vda_nextptr;
1786 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1792 if (elf_dynverref (abfd) != 0)
1794 Elf_Internal_Verneed *t;
1796 fprintf (f, _("\nVersion References:\n"));
1797 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1799 Elf_Internal_Vernaux *a;
1801 fprintf (f, _(" required from %s:\n"),
1802 t->vn_filename ? t->vn_filename : "<corrupt>");
1803 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1804 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1805 a->vna_flags, a->vna_other,
1806 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1818 /* Get version string. */
1821 _bfd_elf_get_symbol_version_string (bfd *abfd, asymbol *symbol,
1822 bfd_boolean *hidden)
1824 const char *version_string = NULL;
1825 if (elf_dynversym (abfd) != 0
1826 && (elf_dynverdef (abfd) != 0 || elf_dynverref (abfd) != 0))
1828 unsigned int vernum = ((elf_symbol_type *) symbol)->version;
1830 *hidden = (vernum & VERSYM_HIDDEN) != 0;
1831 vernum &= VERSYM_VERSION;
1834 version_string = "";
1835 else if (vernum == 1)
1836 version_string = "Base";
1837 else if (vernum <= elf_tdata (abfd)->cverdefs)
1839 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1842 Elf_Internal_Verneed *t;
1844 version_string = "";
1845 for (t = elf_tdata (abfd)->verref;
1849 Elf_Internal_Vernaux *a;
1851 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1853 if (a->vna_other == vernum)
1855 version_string = a->vna_nodename;
1862 return version_string;
1865 /* Display ELF-specific fields of a symbol. */
1868 bfd_elf_print_symbol (bfd *abfd,
1871 bfd_print_symbol_type how)
1873 FILE *file = (FILE *) filep;
1876 case bfd_print_symbol_name:
1877 fprintf (file, "%s", symbol->name);
1879 case bfd_print_symbol_more:
1880 fprintf (file, "elf ");
1881 bfd_fprintf_vma (abfd, file, symbol->value);
1882 fprintf (file, " %x", symbol->flags);
1884 case bfd_print_symbol_all:
1886 const char *section_name;
1887 const char *name = NULL;
1888 const struct elf_backend_data *bed;
1889 unsigned char st_other;
1891 const char *version_string;
1894 section_name = symbol->section ? symbol->section->name : "(*none*)";
1896 bed = get_elf_backend_data (abfd);
1897 if (bed->elf_backend_print_symbol_all)
1898 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1902 name = symbol->name;
1903 bfd_print_symbol_vandf (abfd, file, symbol);
1906 fprintf (file, " %s\t", section_name);
1907 /* Print the "other" value for a symbol. For common symbols,
1908 we've already printed the size; now print the alignment.
1909 For other symbols, we have no specified alignment, and
1910 we've printed the address; now print the size. */
1911 if (symbol->section && bfd_is_com_section (symbol->section))
1912 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1914 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1915 bfd_fprintf_vma (abfd, file, val);
1917 /* If we have version information, print it. */
1918 version_string = _bfd_elf_get_symbol_version_string (abfd,
1924 fprintf (file, " %-11s", version_string);
1929 fprintf (file, " (%s)", version_string);
1930 for (i = 10 - strlen (version_string); i > 0; --i)
1935 /* If the st_other field is not zero, print it. */
1936 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1941 case STV_INTERNAL: fprintf (file, " .internal"); break;
1942 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1943 case STV_PROTECTED: fprintf (file, " .protected"); break;
1945 /* Some other non-defined flags are also present, so print
1947 fprintf (file, " 0x%02x", (unsigned int) st_other);
1950 fprintf (file, " %s", name);
1956 /* ELF .o/exec file reading */
1958 /* Create a new bfd section from an ELF section header. */
1961 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1963 Elf_Internal_Shdr *hdr;
1964 Elf_Internal_Ehdr *ehdr;
1965 const struct elf_backend_data *bed;
1967 bfd_boolean ret = TRUE;
1968 static bfd_boolean * sections_being_created = NULL;
1969 static bfd * sections_being_created_abfd = NULL;
1970 static unsigned int nesting = 0;
1972 if (shindex >= elf_numsections (abfd))
1977 /* PR17512: A corrupt ELF binary might contain a recursive group of
1978 sections, with each the string indicies pointing to the next in the
1979 loop. Detect this here, by refusing to load a section that we are
1980 already in the process of loading. We only trigger this test if
1981 we have nested at least three sections deep as normal ELF binaries
1982 can expect to recurse at least once.
1984 FIXME: It would be better if this array was attached to the bfd,
1985 rather than being held in a static pointer. */
1987 if (sections_being_created_abfd != abfd)
1988 sections_being_created = NULL;
1989 if (sections_being_created == NULL)
1991 /* FIXME: It would be more efficient to attach this array to the bfd somehow. */
1992 sections_being_created = (bfd_boolean *)
1993 bfd_zalloc (abfd, elf_numsections (abfd) * sizeof (bfd_boolean));
1994 sections_being_created_abfd = abfd;
1996 if (sections_being_created [shindex])
1999 (_("%B: warning: loop in section dependencies detected"), abfd);
2002 sections_being_created [shindex] = TRUE;
2005 hdr = elf_elfsections (abfd)[shindex];
2006 ehdr = elf_elfheader (abfd);
2007 name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx,
2012 bed = get_elf_backend_data (abfd);
2013 switch (hdr->sh_type)
2016 /* Inactive section. Throw it away. */
2019 case SHT_PROGBITS: /* Normal section with contents. */
2020 case SHT_NOBITS: /* .bss section. */
2021 case SHT_HASH: /* .hash section. */
2022 case SHT_NOTE: /* .note section. */
2023 case SHT_INIT_ARRAY: /* .init_array section. */
2024 case SHT_FINI_ARRAY: /* .fini_array section. */
2025 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
2026 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
2027 case SHT_GNU_HASH: /* .gnu.hash section. */
2028 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2031 case SHT_DYNAMIC: /* Dynamic linking information. */
2032 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2035 if (hdr->sh_link > elf_numsections (abfd))
2037 /* PR 10478: Accept Solaris binaries with a sh_link
2038 field set to SHN_BEFORE or SHN_AFTER. */
2039 switch (bfd_get_arch (abfd))
2042 case bfd_arch_sparc:
2043 if (hdr->sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
2044 || hdr->sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
2046 /* Otherwise fall through. */
2051 else if (elf_elfsections (abfd)[hdr->sh_link] == NULL)
2053 else if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
2055 Elf_Internal_Shdr *dynsymhdr;
2057 /* The shared libraries distributed with hpux11 have a bogus
2058 sh_link field for the ".dynamic" section. Find the
2059 string table for the ".dynsym" section instead. */
2060 if (elf_dynsymtab (abfd) != 0)
2062 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
2063 hdr->sh_link = dynsymhdr->sh_link;
2067 unsigned int i, num_sec;
2069 num_sec = elf_numsections (abfd);
2070 for (i = 1; i < num_sec; i++)
2072 dynsymhdr = elf_elfsections (abfd)[i];
2073 if (dynsymhdr->sh_type == SHT_DYNSYM)
2075 hdr->sh_link = dynsymhdr->sh_link;
2083 case SHT_SYMTAB: /* A symbol table. */
2084 if (elf_onesymtab (abfd) == shindex)
2087 if (hdr->sh_entsize != bed->s->sizeof_sym)
2090 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
2092 if (hdr->sh_size != 0)
2094 /* Some assemblers erroneously set sh_info to one with a
2095 zero sh_size. ld sees this as a global symbol count
2096 of (unsigned) -1. Fix it here. */
2101 /* PR 18854: A binary might contain more than one symbol table.
2102 Unusual, but possible. Warn, but continue. */
2103 if (elf_onesymtab (abfd) != 0)
2106 /* xgettext:c-format */
2107 (_("%B: warning: multiple symbol tables detected"
2108 " - ignoring the table in section %u"),
2112 elf_onesymtab (abfd) = shindex;
2113 elf_symtab_hdr (abfd) = *hdr;
2114 elf_elfsections (abfd)[shindex] = hdr = & elf_symtab_hdr (abfd);
2115 abfd->flags |= HAS_SYMS;
2117 /* Sometimes a shared object will map in the symbol table. If
2118 SHF_ALLOC is set, and this is a shared object, then we also
2119 treat this section as a BFD section. We can not base the
2120 decision purely on SHF_ALLOC, because that flag is sometimes
2121 set in a relocatable object file, which would confuse the
2123 if ((hdr->sh_flags & SHF_ALLOC) != 0
2124 && (abfd->flags & DYNAMIC) != 0
2125 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2129 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
2130 can't read symbols without that section loaded as well. It
2131 is most likely specified by the next section header. */
2133 elf_section_list * entry;
2134 unsigned int i, num_sec;
2136 for (entry = elf_symtab_shndx_list (abfd); entry != NULL; entry = entry->next)
2137 if (entry->hdr.sh_link == shindex)
2140 num_sec = elf_numsections (abfd);
2141 for (i = shindex + 1; i < num_sec; i++)
2143 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2145 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
2146 && hdr2->sh_link == shindex)
2151 for (i = 1; i < shindex; i++)
2153 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2155 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
2156 && hdr2->sh_link == shindex)
2161 ret = bfd_section_from_shdr (abfd, i);
2162 /* else FIXME: we have failed to find the symbol table - should we issue an error ? */
2166 case SHT_DYNSYM: /* A dynamic symbol table. */
2167 if (elf_dynsymtab (abfd) == shindex)
2170 if (hdr->sh_entsize != bed->s->sizeof_sym)
2173 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
2175 if (hdr->sh_size != 0)
2178 /* Some linkers erroneously set sh_info to one with a
2179 zero sh_size. ld sees this as a global symbol count
2180 of (unsigned) -1. Fix it here. */
2185 /* PR 18854: A binary might contain more than one dynamic symbol table.
2186 Unusual, but possible. Warn, but continue. */
2187 if (elf_dynsymtab (abfd) != 0)
2190 /* xgettext:c-format */
2191 (_("%B: warning: multiple dynamic symbol tables detected"
2192 " - ignoring the table in section %u"),
2196 elf_dynsymtab (abfd) = shindex;
2197 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
2198 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
2199 abfd->flags |= HAS_SYMS;
2201 /* Besides being a symbol table, we also treat this as a regular
2202 section, so that objcopy can handle it. */
2203 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2206 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections. */
2208 elf_section_list * entry;
2210 for (entry = elf_symtab_shndx_list (abfd); entry != NULL; entry = entry->next)
2211 if (entry->ndx == shindex)
2214 entry = bfd_alloc (abfd, sizeof * entry);
2217 entry->ndx = shindex;
2219 entry->next = elf_symtab_shndx_list (abfd);
2220 elf_symtab_shndx_list (abfd) = entry;
2221 elf_elfsections (abfd)[shindex] = & entry->hdr;
2225 case SHT_STRTAB: /* A string table. */
2226 if (hdr->bfd_section != NULL)
2229 if (ehdr->e_shstrndx == shindex)
2231 elf_tdata (abfd)->shstrtab_hdr = *hdr;
2232 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
2236 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
2239 elf_tdata (abfd)->strtab_hdr = *hdr;
2240 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
2244 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
2247 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
2248 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
2249 elf_elfsections (abfd)[shindex] = hdr;
2250 /* We also treat this as a regular section, so that objcopy
2252 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2257 /* If the string table isn't one of the above, then treat it as a
2258 regular section. We need to scan all the headers to be sure,
2259 just in case this strtab section appeared before the above. */
2260 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
2262 unsigned int i, num_sec;
2264 num_sec = elf_numsections (abfd);
2265 for (i = 1; i < num_sec; i++)
2267 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
2268 if (hdr2->sh_link == shindex)
2270 /* Prevent endless recursion on broken objects. */
2273 if (! bfd_section_from_shdr (abfd, i))
2275 if (elf_onesymtab (abfd) == i)
2277 if (elf_dynsymtab (abfd) == i)
2278 goto dynsymtab_strtab;
2282 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2287 /* *These* do a lot of work -- but build no sections! */
2289 asection *target_sect;
2290 Elf_Internal_Shdr *hdr2, **p_hdr;
2291 unsigned int num_sec = elf_numsections (abfd);
2292 struct bfd_elf_section_data *esdt;
2295 != (bfd_size_type) (hdr->sh_type == SHT_REL
2296 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
2299 /* Check for a bogus link to avoid crashing. */
2300 if (hdr->sh_link >= num_sec)
2303 /* xgettext:c-format */
2304 (_("%B: invalid link %u for reloc section %s (index %u)"),
2305 abfd, hdr->sh_link, name, shindex);
2306 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2311 /* For some incomprehensible reason Oracle distributes
2312 libraries for Solaris in which some of the objects have
2313 bogus sh_link fields. It would be nice if we could just
2314 reject them, but, unfortunately, some people need to use
2315 them. We scan through the section headers; if we find only
2316 one suitable symbol table, we clobber the sh_link to point
2317 to it. I hope this doesn't break anything.
2319 Don't do it on executable nor shared library. */
2320 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0
2321 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
2322 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
2328 for (scan = 1; scan < num_sec; scan++)
2330 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
2331 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
2342 hdr->sh_link = found;
2345 /* Get the symbol table. */
2346 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
2347 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
2348 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
2351 /* If this reloc section does not use the main symbol table we
2352 don't treat it as a reloc section. BFD can't adequately
2353 represent such a section, so at least for now, we don't
2354 try. We just present it as a normal section. We also
2355 can't use it as a reloc section if it points to the null
2356 section, an invalid section, another reloc section, or its
2357 sh_link points to the null section. */
2358 if (hdr->sh_link != elf_onesymtab (abfd)
2359 || hdr->sh_link == SHN_UNDEF
2360 || hdr->sh_info == SHN_UNDEF
2361 || hdr->sh_info >= num_sec
2362 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
2363 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
2365 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2370 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
2373 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
2374 if (target_sect == NULL)
2377 esdt = elf_section_data (target_sect);
2378 if (hdr->sh_type == SHT_RELA)
2379 p_hdr = &esdt->rela.hdr;
2381 p_hdr = &esdt->rel.hdr;
2383 /* PR 17512: file: 0b4f81b7. */
2386 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2));
2391 elf_elfsections (abfd)[shindex] = hdr2;
2392 target_sect->reloc_count += (NUM_SHDR_ENTRIES (hdr)
2393 * bed->s->int_rels_per_ext_rel);
2394 target_sect->flags |= SEC_RELOC;
2395 target_sect->relocation = NULL;
2396 target_sect->rel_filepos = hdr->sh_offset;
2397 /* In the section to which the relocations apply, mark whether
2398 its relocations are of the REL or RELA variety. */
2399 if (hdr->sh_size != 0)
2401 if (hdr->sh_type == SHT_RELA)
2402 target_sect->use_rela_p = 1;
2404 abfd->flags |= HAS_RELOC;
2408 case SHT_GNU_verdef:
2409 elf_dynverdef (abfd) = shindex;
2410 elf_tdata (abfd)->dynverdef_hdr = *hdr;
2411 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2414 case SHT_GNU_versym:
2415 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
2418 elf_dynversym (abfd) = shindex;
2419 elf_tdata (abfd)->dynversym_hdr = *hdr;
2420 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2423 case SHT_GNU_verneed:
2424 elf_dynverref (abfd) = shindex;
2425 elf_tdata (abfd)->dynverref_hdr = *hdr;
2426 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2433 if (! IS_VALID_GROUP_SECTION_HEADER (hdr, GRP_ENTRY_SIZE))
2436 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2442 /* Possibly an attributes section. */
2443 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
2444 || hdr->sh_type == bed->obj_attrs_section_type)
2446 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2448 _bfd_elf_parse_attributes (abfd, hdr);
2452 /* Check for any processor-specific section types. */
2453 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
2456 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
2458 if ((hdr->sh_flags & SHF_ALLOC) != 0)
2459 /* FIXME: How to properly handle allocated section reserved
2460 for applications? */
2462 /* xgettext:c-format */
2463 (_("%B: unknown type [%#x] section `%s'"),
2464 abfd, hdr->sh_type, name);
2467 /* Allow sections reserved for applications. */
2468 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2473 else if (hdr->sh_type >= SHT_LOPROC
2474 && hdr->sh_type <= SHT_HIPROC)
2475 /* FIXME: We should handle this section. */
2477 /* xgettext:c-format */
2478 (_("%B: unknown type [%#x] section `%s'"),
2479 abfd, hdr->sh_type, name);
2480 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
2482 /* Unrecognised OS-specific sections. */
2483 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
2484 /* SHF_OS_NONCONFORMING indicates that special knowledge is
2485 required to correctly process the section and the file should
2486 be rejected with an error message. */
2488 /* xgettext:c-format */
2489 (_("%B: unknown type [%#x] section `%s'"),
2490 abfd, hdr->sh_type, name);
2493 /* Otherwise it should be processed. */
2494 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2499 /* FIXME: We should handle this section. */
2501 /* xgettext:c-format */
2502 (_("%B: unknown type [%#x] section `%s'"),
2503 abfd, hdr->sh_type, name);
2511 if (sections_being_created && sections_being_created_abfd == abfd)
2512 sections_being_created [shindex] = FALSE;
2513 if (-- nesting == 0)
2515 sections_being_created = NULL;
2516 sections_being_created_abfd = abfd;
2521 /* Return the local symbol specified by ABFD, R_SYMNDX. */
2524 bfd_sym_from_r_symndx (struct sym_cache *cache,
2526 unsigned long r_symndx)
2528 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2530 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
2532 Elf_Internal_Shdr *symtab_hdr;
2533 unsigned char esym[sizeof (Elf64_External_Sym)];
2534 Elf_External_Sym_Shndx eshndx;
2536 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2537 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2538 &cache->sym[ent], esym, &eshndx) == NULL)
2541 if (cache->abfd != abfd)
2543 memset (cache->indx, -1, sizeof (cache->indx));
2546 cache->indx[ent] = r_symndx;
2549 return &cache->sym[ent];
2552 /* Given an ELF section number, retrieve the corresponding BFD
2556 bfd_section_from_elf_index (bfd *abfd, unsigned int sec_index)
2558 if (sec_index >= elf_numsections (abfd))
2560 return elf_elfsections (abfd)[sec_index]->bfd_section;
2563 static const struct bfd_elf_special_section special_sections_b[] =
2565 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2566 { NULL, 0, 0, 0, 0 }
2569 static const struct bfd_elf_special_section special_sections_c[] =
2571 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
2572 { NULL, 0, 0, 0, 0 }
2575 static const struct bfd_elf_special_section special_sections_d[] =
2577 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2578 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2579 /* There are more DWARF sections than these, but they needn't be added here
2580 unless you have to cope with broken compilers that don't emit section
2581 attributes or you want to help the user writing assembler. */
2582 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
2583 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
2584 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
2585 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
2586 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
2587 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
2588 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
2589 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
2590 { NULL, 0, 0, 0, 0 }
2593 static const struct bfd_elf_special_section special_sections_f[] =
2595 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2596 { STRING_COMMA_LEN (".fini_array"), -2, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2597 { NULL, 0 , 0, 0, 0 }
2600 static const struct bfd_elf_special_section special_sections_g[] =
2602 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2603 { STRING_COMMA_LEN (".gnu.lto_"), -1, SHT_PROGBITS, SHF_EXCLUDE },
2604 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2605 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2606 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2607 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2608 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2609 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2610 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2611 { NULL, 0, 0, 0, 0 }
2614 static const struct bfd_elf_special_section special_sections_h[] =
2616 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2617 { NULL, 0, 0, 0, 0 }
2620 static const struct bfd_elf_special_section special_sections_i[] =
2622 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2623 { STRING_COMMA_LEN (".init_array"), -2, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2624 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2625 { NULL, 0, 0, 0, 0 }
2628 static const struct bfd_elf_special_section special_sections_l[] =
2630 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2631 { NULL, 0, 0, 0, 0 }
2634 static const struct bfd_elf_special_section special_sections_n[] =
2636 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2637 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2638 { NULL, 0, 0, 0, 0 }
2641 static const struct bfd_elf_special_section special_sections_p[] =
2643 { STRING_COMMA_LEN (".preinit_array"), -2, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2644 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2645 { NULL, 0, 0, 0, 0 }
2648 static const struct bfd_elf_special_section special_sections_r[] =
2650 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2651 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2652 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2653 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2654 { NULL, 0, 0, 0, 0 }
2657 static const struct bfd_elf_special_section special_sections_s[] =
2659 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2660 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2661 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2662 /* See struct bfd_elf_special_section declaration for the semantics of
2663 this special case where .prefix_length != strlen (.prefix). */
2664 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2665 { NULL, 0, 0, 0, 0 }
2668 static const struct bfd_elf_special_section special_sections_t[] =
2670 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2671 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2672 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2673 { NULL, 0, 0, 0, 0 }
2676 static const struct bfd_elf_special_section special_sections_z[] =
2678 { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 },
2679 { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 },
2680 { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 },
2681 { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 },
2682 { NULL, 0, 0, 0, 0 }
2685 static const struct bfd_elf_special_section * const special_sections[] =
2687 special_sections_b, /* 'b' */
2688 special_sections_c, /* 'c' */
2689 special_sections_d, /* 'd' */
2691 special_sections_f, /* 'f' */
2692 special_sections_g, /* 'g' */
2693 special_sections_h, /* 'h' */
2694 special_sections_i, /* 'i' */
2697 special_sections_l, /* 'l' */
2699 special_sections_n, /* 'n' */
2701 special_sections_p, /* 'p' */
2703 special_sections_r, /* 'r' */
2704 special_sections_s, /* 's' */
2705 special_sections_t, /* 't' */
2711 special_sections_z /* 'z' */
2714 const struct bfd_elf_special_section *
2715 _bfd_elf_get_special_section (const char *name,
2716 const struct bfd_elf_special_section *spec,
2722 len = strlen (name);
2724 for (i = 0; spec[i].prefix != NULL; i++)
2727 int prefix_len = spec[i].prefix_length;
2729 if (len < prefix_len)
2731 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2734 suffix_len = spec[i].suffix_length;
2735 if (suffix_len <= 0)
2737 if (name[prefix_len] != 0)
2739 if (suffix_len == 0)
2741 if (name[prefix_len] != '.'
2742 && (suffix_len == -2
2743 || (rela && spec[i].type == SHT_REL)))
2749 if (len < prefix_len + suffix_len)
2751 if (memcmp (name + len - suffix_len,
2752 spec[i].prefix + prefix_len,
2762 const struct bfd_elf_special_section *
2763 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2766 const struct bfd_elf_special_section *spec;
2767 const struct elf_backend_data *bed;
2769 /* See if this is one of the special sections. */
2770 if (sec->name == NULL)
2773 bed = get_elf_backend_data (abfd);
2774 spec = bed->special_sections;
2777 spec = _bfd_elf_get_special_section (sec->name,
2778 bed->special_sections,
2784 if (sec->name[0] != '.')
2787 i = sec->name[1] - 'b';
2788 if (i < 0 || i > 'z' - 'b')
2791 spec = special_sections[i];
2796 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2800 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2802 struct bfd_elf_section_data *sdata;
2803 const struct elf_backend_data *bed;
2804 const struct bfd_elf_special_section *ssect;
2806 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2809 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd,
2813 sec->used_by_bfd = sdata;
2816 /* Indicate whether or not this section should use RELA relocations. */
2817 bed = get_elf_backend_data (abfd);
2818 sec->use_rela_p = bed->default_use_rela_p;
2820 /* When we read a file, we don't need to set ELF section type and
2821 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2822 anyway. We will set ELF section type and flags for all linker
2823 created sections. If user specifies BFD section flags, we will
2824 set ELF section type and flags based on BFD section flags in
2825 elf_fake_sections. Special handling for .init_array/.fini_array
2826 output sections since they may contain .ctors/.dtors input
2827 sections. We don't want _bfd_elf_init_private_section_data to
2828 copy ELF section type from .ctors/.dtors input sections. */
2829 if (abfd->direction != read_direction
2830 || (sec->flags & SEC_LINKER_CREATED) != 0)
2832 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2835 || (sec->flags & SEC_LINKER_CREATED) != 0
2836 || ssect->type == SHT_INIT_ARRAY
2837 || ssect->type == SHT_FINI_ARRAY))
2839 elf_section_type (sec) = ssect->type;
2840 elf_section_flags (sec) = ssect->attr;
2844 return _bfd_generic_new_section_hook (abfd, sec);
2847 /* Create a new bfd section from an ELF program header.
2849 Since program segments have no names, we generate a synthetic name
2850 of the form segment<NUM>, where NUM is generally the index in the
2851 program header table. For segments that are split (see below) we
2852 generate the names segment<NUM>a and segment<NUM>b.
2854 Note that some program segments may have a file size that is different than
2855 (less than) the memory size. All this means is that at execution the
2856 system must allocate the amount of memory specified by the memory size,
2857 but only initialize it with the first "file size" bytes read from the
2858 file. This would occur for example, with program segments consisting
2859 of combined data+bss.
2861 To handle the above situation, this routine generates TWO bfd sections
2862 for the single program segment. The first has the length specified by
2863 the file size of the segment, and the second has the length specified
2864 by the difference between the two sizes. In effect, the segment is split
2865 into its initialized and uninitialized parts.
2870 _bfd_elf_make_section_from_phdr (bfd *abfd,
2871 Elf_Internal_Phdr *hdr,
2873 const char *type_name)
2881 split = ((hdr->p_memsz > 0)
2882 && (hdr->p_filesz > 0)
2883 && (hdr->p_memsz > hdr->p_filesz));
2885 if (hdr->p_filesz > 0)
2887 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "a" : "");
2888 len = strlen (namebuf) + 1;
2889 name = (char *) bfd_alloc (abfd, len);
2892 memcpy (name, namebuf, len);
2893 newsect = bfd_make_section (abfd, name);
2894 if (newsect == NULL)
2896 newsect->vma = hdr->p_vaddr;
2897 newsect->lma = hdr->p_paddr;
2898 newsect->size = hdr->p_filesz;
2899 newsect->filepos = hdr->p_offset;
2900 newsect->flags |= SEC_HAS_CONTENTS;
2901 newsect->alignment_power = bfd_log2 (hdr->p_align);
2902 if (hdr->p_type == PT_LOAD)
2904 newsect->flags |= SEC_ALLOC;
2905 newsect->flags |= SEC_LOAD;
2906 if (hdr->p_flags & PF_X)
2908 /* FIXME: all we known is that it has execute PERMISSION,
2910 newsect->flags |= SEC_CODE;
2913 if (!(hdr->p_flags & PF_W))
2915 newsect->flags |= SEC_READONLY;
2919 if (hdr->p_memsz > hdr->p_filesz)
2923 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "b" : "");
2924 len = strlen (namebuf) + 1;
2925 name = (char *) bfd_alloc (abfd, len);
2928 memcpy (name, namebuf, len);
2929 newsect = bfd_make_section (abfd, name);
2930 if (newsect == NULL)
2932 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2933 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2934 newsect->size = hdr->p_memsz - hdr->p_filesz;
2935 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2936 align = newsect->vma & -newsect->vma;
2937 if (align == 0 || align > hdr->p_align)
2938 align = hdr->p_align;
2939 newsect->alignment_power = bfd_log2 (align);
2940 if (hdr->p_type == PT_LOAD)
2942 /* Hack for gdb. Segments that have not been modified do
2943 not have their contents written to a core file, on the
2944 assumption that a debugger can find the contents in the
2945 executable. We flag this case by setting the fake
2946 section size to zero. Note that "real" bss sections will
2947 always have their contents dumped to the core file. */
2948 if (bfd_get_format (abfd) == bfd_core)
2950 newsect->flags |= SEC_ALLOC;
2951 if (hdr->p_flags & PF_X)
2952 newsect->flags |= SEC_CODE;
2954 if (!(hdr->p_flags & PF_W))
2955 newsect->flags |= SEC_READONLY;
2962 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int hdr_index)
2964 const struct elf_backend_data *bed;
2966 switch (hdr->p_type)
2969 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "null");
2972 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "load");
2975 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "dynamic");
2978 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "interp");
2981 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "note"))
2983 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2988 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "shlib");
2991 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "phdr");
2993 case PT_GNU_EH_FRAME:
2994 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index,
2998 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "stack");
3001 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "relro");
3004 /* Check for any processor-specific program segment types. */
3005 bed = get_elf_backend_data (abfd);
3006 return bed->elf_backend_section_from_phdr (abfd, hdr, hdr_index, "proc");
3010 /* Return the REL_HDR for SEC, assuming there is only a single one, either
3014 _bfd_elf_single_rel_hdr (asection *sec)
3016 if (elf_section_data (sec)->rel.hdr)
3018 BFD_ASSERT (elf_section_data (sec)->rela.hdr == NULL);
3019 return elf_section_data (sec)->rel.hdr;
3022 return elf_section_data (sec)->rela.hdr;
3026 _bfd_elf_set_reloc_sh_name (bfd *abfd,
3027 Elf_Internal_Shdr *rel_hdr,
3028 const char *sec_name,
3029 bfd_boolean use_rela_p)
3031 char *name = (char *) bfd_alloc (abfd,
3032 sizeof ".rela" + strlen (sec_name));
3036 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", sec_name);
3038 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
3040 if (rel_hdr->sh_name == (unsigned int) -1)
3046 /* Allocate and initialize a section-header for a new reloc section,
3047 containing relocations against ASECT. It is stored in RELDATA. If
3048 USE_RELA_P is TRUE, we use RELA relocations; otherwise, we use REL
3052 _bfd_elf_init_reloc_shdr (bfd *abfd,
3053 struct bfd_elf_section_reloc_data *reldata,
3054 const char *sec_name,
3055 bfd_boolean use_rela_p,
3056 bfd_boolean delay_st_name_p)
3058 Elf_Internal_Shdr *rel_hdr;
3059 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3061 BFD_ASSERT (reldata->hdr == NULL);
3062 rel_hdr = bfd_zalloc (abfd, sizeof (*rel_hdr));
3063 reldata->hdr = rel_hdr;
3065 if (delay_st_name_p)
3066 rel_hdr->sh_name = (unsigned int) -1;
3067 else if (!_bfd_elf_set_reloc_sh_name (abfd, rel_hdr, sec_name,
3070 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
3071 rel_hdr->sh_entsize = (use_rela_p
3072 ? bed->s->sizeof_rela
3073 : bed->s->sizeof_rel);
3074 rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
3075 rel_hdr->sh_flags = 0;
3076 rel_hdr->sh_addr = 0;
3077 rel_hdr->sh_size = 0;
3078 rel_hdr->sh_offset = 0;
3083 /* Return the default section type based on the passed in section flags. */
3086 bfd_elf_get_default_section_type (flagword flags)
3088 if ((flags & SEC_ALLOC) != 0
3089 && (flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
3091 return SHT_PROGBITS;
3094 struct fake_section_arg
3096 struct bfd_link_info *link_info;
3100 /* Set up an ELF internal section header for a section. */
3103 elf_fake_sections (bfd *abfd, asection *asect, void *fsarg)
3105 struct fake_section_arg *arg = (struct fake_section_arg *)fsarg;
3106 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3107 struct bfd_elf_section_data *esd = elf_section_data (asect);
3108 Elf_Internal_Shdr *this_hdr;
3109 unsigned int sh_type;
3110 const char *name = asect->name;
3111 bfd_boolean delay_st_name_p = FALSE;
3115 /* We already failed; just get out of the bfd_map_over_sections
3120 this_hdr = &esd->this_hdr;
3124 /* ld: compress DWARF debug sections with names: .debug_*. */
3125 if ((arg->link_info->compress_debug & COMPRESS_DEBUG)
3126 && (asect->flags & SEC_DEBUGGING)
3130 /* Set SEC_ELF_COMPRESS to indicate this section should be
3132 asect->flags |= SEC_ELF_COMPRESS;
3134 /* If this section will be compressed, delay adding section
3135 name to section name section after it is compressed in
3136 _bfd_elf_assign_file_positions_for_non_load. */
3137 delay_st_name_p = TRUE;
3140 else if ((asect->flags & SEC_ELF_RENAME))
3142 /* objcopy: rename output DWARF debug section. */
3143 if ((abfd->flags & (BFD_DECOMPRESS | BFD_COMPRESS_GABI)))
3145 /* When we decompress or compress with SHF_COMPRESSED,
3146 convert section name from .zdebug_* to .debug_* if
3150 char *new_name = convert_zdebug_to_debug (abfd, name);
3151 if (new_name == NULL)
3159 else if (asect->compress_status == COMPRESS_SECTION_DONE)
3161 /* PR binutils/18087: Compression does not always make a
3162 section smaller. So only rename the section when
3163 compression has actually taken place. If input section
3164 name is .zdebug_*, we should never compress it again. */
3165 char *new_name = convert_debug_to_zdebug (abfd, name);
3166 if (new_name == NULL)
3171 BFD_ASSERT (name[1] != 'z');
3176 if (delay_st_name_p)
3177 this_hdr->sh_name = (unsigned int) -1;
3181 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3183 if (this_hdr->sh_name == (unsigned int) -1)
3190 /* Don't clear sh_flags. Assembler may set additional bits. */
3192 if ((asect->flags & SEC_ALLOC) != 0
3193 || asect->user_set_vma)
3194 this_hdr->sh_addr = asect->vma;
3196 this_hdr->sh_addr = 0;
3198 this_hdr->sh_offset = 0;
3199 this_hdr->sh_size = asect->size;
3200 this_hdr->sh_link = 0;
3201 /* PR 17512: file: 0eb809fe, 8b0535ee. */
3202 if (asect->alignment_power >= (sizeof (bfd_vma) * 8) - 1)
3205 /* xgettext:c-format */
3206 (_("%B: error: Alignment power %d of section `%A' is too big"),
3207 abfd, asect->alignment_power, asect);
3211 this_hdr->sh_addralign = (bfd_vma) 1 << asect->alignment_power;
3212 /* The sh_entsize and sh_info fields may have been set already by
3213 copy_private_section_data. */
3215 this_hdr->bfd_section = asect;
3216 this_hdr->contents = NULL;
3218 /* If the section type is unspecified, we set it based on
3220 if ((asect->flags & SEC_GROUP) != 0)
3221 sh_type = SHT_GROUP;
3223 sh_type = bfd_elf_get_default_section_type (asect->flags);
3225 if (this_hdr->sh_type == SHT_NULL)
3226 this_hdr->sh_type = sh_type;
3227 else if (this_hdr->sh_type == SHT_NOBITS
3228 && sh_type == SHT_PROGBITS
3229 && (asect->flags & SEC_ALLOC) != 0)
3231 /* Warn if we are changing a NOBITS section to PROGBITS, but
3232 allow the link to proceed. This can happen when users link
3233 non-bss input sections to bss output sections, or emit data
3234 to a bss output section via a linker script. */
3236 (_("warning: section `%A' type changed to PROGBITS"), asect);
3237 this_hdr->sh_type = sh_type;
3240 switch (this_hdr->sh_type)
3251 case SHT_INIT_ARRAY:
3252 case SHT_FINI_ARRAY:
3253 case SHT_PREINIT_ARRAY:
3254 this_hdr->sh_entsize = bed->s->arch_size / 8;
3258 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
3262 this_hdr->sh_entsize = bed->s->sizeof_sym;
3266 this_hdr->sh_entsize = bed->s->sizeof_dyn;
3270 if (get_elf_backend_data (abfd)->may_use_rela_p)
3271 this_hdr->sh_entsize = bed->s->sizeof_rela;
3275 if (get_elf_backend_data (abfd)->may_use_rel_p)
3276 this_hdr->sh_entsize = bed->s->sizeof_rel;
3279 case SHT_GNU_versym:
3280 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
3283 case SHT_GNU_verdef:
3284 this_hdr->sh_entsize = 0;
3285 /* objcopy or strip will copy over sh_info, but may not set
3286 cverdefs. The linker will set cverdefs, but sh_info will be
3288 if (this_hdr->sh_info == 0)
3289 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
3291 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
3292 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
3295 case SHT_GNU_verneed:
3296 this_hdr->sh_entsize = 0;
3297 /* objcopy or strip will copy over sh_info, but may not set
3298 cverrefs. The linker will set cverrefs, but sh_info will be
3300 if (this_hdr->sh_info == 0)
3301 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
3303 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
3304 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
3308 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
3312 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
3316 if ((asect->flags & SEC_ALLOC) != 0)
3317 this_hdr->sh_flags |= SHF_ALLOC;
3318 if ((asect->flags & SEC_READONLY) == 0)
3319 this_hdr->sh_flags |= SHF_WRITE;
3320 if ((asect->flags & SEC_CODE) != 0)
3321 this_hdr->sh_flags |= SHF_EXECINSTR;
3322 if ((asect->flags & SEC_MERGE) != 0)
3324 this_hdr->sh_flags |= SHF_MERGE;
3325 this_hdr->sh_entsize = asect->entsize;
3327 if ((asect->flags & SEC_STRINGS) != 0)
3328 this_hdr->sh_flags |= SHF_STRINGS;
3329 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
3330 this_hdr->sh_flags |= SHF_GROUP;
3331 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
3333 this_hdr->sh_flags |= SHF_TLS;
3334 if (asect->size == 0
3335 && (asect->flags & SEC_HAS_CONTENTS) == 0)
3337 struct bfd_link_order *o = asect->map_tail.link_order;
3339 this_hdr->sh_size = 0;
3342 this_hdr->sh_size = o->offset + o->size;
3343 if (this_hdr->sh_size != 0)
3344 this_hdr->sh_type = SHT_NOBITS;
3348 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
3349 this_hdr->sh_flags |= SHF_EXCLUDE;
3351 /* If the section has relocs, set up a section header for the
3352 SHT_REL[A] section. If two relocation sections are required for
3353 this section, it is up to the processor-specific back-end to
3354 create the other. */
3355 if ((asect->flags & SEC_RELOC) != 0)
3357 /* When doing a relocatable link, create both REL and RELA sections if
3360 /* Do the normal setup if we wouldn't create any sections here. */
3361 && esd->rel.count + esd->rela.count > 0
3362 && (bfd_link_relocatable (arg->link_info)
3363 || arg->link_info->emitrelocations))
3365 if (esd->rel.count && esd->rel.hdr == NULL
3366 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rel, name, FALSE,
3372 if (esd->rela.count && esd->rela.hdr == NULL
3373 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rela, name, TRUE,
3380 else if (!_bfd_elf_init_reloc_shdr (abfd,
3382 ? &esd->rela : &esd->rel),
3389 /* Check for processor-specific section types. */
3390 sh_type = this_hdr->sh_type;
3391 if (bed->elf_backend_fake_sections
3392 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
3395 if (sh_type == SHT_NOBITS && asect->size != 0)
3397 /* Don't change the header type from NOBITS if we are being
3398 called for objcopy --only-keep-debug. */
3399 this_hdr->sh_type = sh_type;
3403 /* Fill in the contents of a SHT_GROUP section. Called from
3404 _bfd_elf_compute_section_file_positions for gas, objcopy, and
3405 when ELF targets use the generic linker, ld. Called for ld -r
3406 from bfd_elf_final_link. */
3409 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
3411 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
3412 asection *elt, *first;
3416 /* Ignore linker created group section. See elfNN_ia64_object_p in
3418 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
3422 if (elf_section_data (sec)->this_hdr.sh_info == 0)
3424 unsigned long symindx = 0;
3426 /* elf_group_id will have been set up by objcopy and the
3428 if (elf_group_id (sec) != NULL)
3429 symindx = elf_group_id (sec)->udata.i;
3433 /* If called from the assembler, swap_out_syms will have set up
3434 elf_section_syms. */
3435 BFD_ASSERT (elf_section_syms (abfd) != NULL);
3436 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
3438 elf_section_data (sec)->this_hdr.sh_info = symindx;
3440 else if (elf_section_data (sec)->this_hdr.sh_info == (unsigned int) -2)
3442 /* The ELF backend linker sets sh_info to -2 when the group
3443 signature symbol is global, and thus the index can't be
3444 set until all local symbols are output. */
3446 struct bfd_elf_section_data *sec_data;
3447 unsigned long symndx;
3448 unsigned long extsymoff;
3449 struct elf_link_hash_entry *h;
3451 /* The point of this little dance to the first SHF_GROUP section
3452 then back to the SHT_GROUP section is that this gets us to
3453 the SHT_GROUP in the input object. */
3454 igroup = elf_sec_group (elf_next_in_group (sec));
3455 sec_data = elf_section_data (igroup);
3456 symndx = sec_data->this_hdr.sh_info;
3458 if (!elf_bad_symtab (igroup->owner))
3460 Elf_Internal_Shdr *symtab_hdr;
3462 symtab_hdr = &elf_tdata (igroup->owner)->symtab_hdr;
3463 extsymoff = symtab_hdr->sh_info;
3465 h = elf_sym_hashes (igroup->owner)[symndx - extsymoff];
3466 while (h->root.type == bfd_link_hash_indirect
3467 || h->root.type == bfd_link_hash_warning)
3468 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3470 elf_section_data (sec)->this_hdr.sh_info = h->indx;
3473 /* The contents won't be allocated for "ld -r" or objcopy. */
3475 if (sec->contents == NULL)
3478 sec->contents = (unsigned char *) bfd_alloc (abfd, sec->size);
3480 /* Arrange for the section to be written out. */
3481 elf_section_data (sec)->this_hdr.contents = sec->contents;
3482 if (sec->contents == NULL)
3489 loc = sec->contents + sec->size;
3491 /* Get the pointer to the first section in the group that gas
3492 squirreled away here. objcopy arranges for this to be set to the
3493 start of the input section group. */
3494 first = elt = elf_next_in_group (sec);
3496 /* First element is a flag word. Rest of section is elf section
3497 indices for all the sections of the group. Write them backwards
3498 just to keep the group in the same order as given in .section
3499 directives, not that it matters. */
3506 s = s->output_section;
3508 && !bfd_is_abs_section (s))
3510 unsigned int idx = elf_section_data (s)->this_idx;
3513 H_PUT_32 (abfd, idx, loc);
3515 elt = elf_next_in_group (elt);
3521 BFD_ASSERT (loc == sec->contents);
3523 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
3526 /* Given NAME, the name of a relocation section stripped of its
3527 .rel/.rela prefix, return the section in ABFD to which the
3528 relocations apply. */
3531 _bfd_elf_plt_get_reloc_section (bfd *abfd, const char *name)
3533 /* If a target needs .got.plt section, relocations in rela.plt/rel.plt
3534 section likely apply to .got.plt or .got section. */
3535 if (get_elf_backend_data (abfd)->want_got_plt
3536 && strcmp (name, ".plt") == 0)
3541 sec = bfd_get_section_by_name (abfd, name);
3547 return bfd_get_section_by_name (abfd, name);
3550 /* Return the section to which RELOC_SEC applies. */
3553 elf_get_reloc_section (asection *reloc_sec)
3558 const struct elf_backend_data *bed;
3560 type = elf_section_data (reloc_sec)->this_hdr.sh_type;
3561 if (type != SHT_REL && type != SHT_RELA)
3564 /* We look up the section the relocs apply to by name. */
3565 name = reloc_sec->name;
3566 if (strncmp (name, ".rel", 4) != 0)
3569 if (type == SHT_RELA && *name++ != 'a')
3572 abfd = reloc_sec->owner;
3573 bed = get_elf_backend_data (abfd);
3574 return bed->get_reloc_section (abfd, name);
3577 /* Assign all ELF section numbers. The dummy first section is handled here
3578 too. The link/info pointers for the standard section types are filled
3579 in here too, while we're at it. */
3582 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
3584 struct elf_obj_tdata *t = elf_tdata (abfd);
3586 unsigned int section_number;
3587 Elf_Internal_Shdr **i_shdrp;
3588 struct bfd_elf_section_data *d;
3589 bfd_boolean need_symtab;
3593 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
3595 /* SHT_GROUP sections are in relocatable files only. */
3596 if (link_info == NULL || !link_info->resolve_section_groups)
3598 size_t reloc_count = 0;
3600 /* Put SHT_GROUP sections first. */
3601 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3603 d = elf_section_data (sec);
3605 if (d->this_hdr.sh_type == SHT_GROUP)
3607 if (sec->flags & SEC_LINKER_CREATED)
3609 /* Remove the linker created SHT_GROUP sections. */
3610 bfd_section_list_remove (abfd, sec);
3611 abfd->section_count--;
3614 d->this_idx = section_number++;
3617 /* Count relocations. */
3618 reloc_count += sec->reloc_count;
3621 /* Clear HAS_RELOC if there are no relocations. */
3622 if (reloc_count == 0)
3623 abfd->flags &= ~HAS_RELOC;
3626 for (sec = abfd->sections; sec; sec = sec->next)
3628 d = elf_section_data (sec);
3630 if (d->this_hdr.sh_type != SHT_GROUP)
3631 d->this_idx = section_number++;
3632 if (d->this_hdr.sh_name != (unsigned int) -1)
3633 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
3636 d->rel.idx = section_number++;
3637 if (d->rel.hdr->sh_name != (unsigned int) -1)
3638 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel.hdr->sh_name);
3645 d->rela.idx = section_number++;
3646 if (d->rela.hdr->sh_name != (unsigned int) -1)
3647 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rela.hdr->sh_name);
3653 need_symtab = (bfd_get_symcount (abfd) > 0
3654 || (link_info == NULL
3655 && ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3659 elf_onesymtab (abfd) = section_number++;
3660 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
3661 if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
3663 elf_section_list * entry;
3665 BFD_ASSERT (elf_symtab_shndx_list (abfd) == NULL);
3667 entry = bfd_zalloc (abfd, sizeof * entry);
3668 entry->ndx = section_number++;
3669 elf_symtab_shndx_list (abfd) = entry;
3671 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3672 ".symtab_shndx", FALSE);
3673 if (entry->hdr.sh_name == (unsigned int) -1)
3676 elf_strtab_sec (abfd) = section_number++;
3677 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
3680 elf_shstrtab_sec (abfd) = section_number++;
3681 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
3682 elf_elfheader (abfd)->e_shstrndx = elf_shstrtab_sec (abfd);
3684 if (section_number >= SHN_LORESERVE)
3686 /* xgettext:c-format */
3687 _bfd_error_handler (_("%B: too many sections: %u"),
3688 abfd, section_number);
3692 elf_numsections (abfd) = section_number;
3693 elf_elfheader (abfd)->e_shnum = section_number;
3695 /* Set up the list of section header pointers, in agreement with the
3697 i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc2 (abfd, section_number,
3698 sizeof (Elf_Internal_Shdr *));
3699 if (i_shdrp == NULL)
3702 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd,
3703 sizeof (Elf_Internal_Shdr));
3704 if (i_shdrp[0] == NULL)
3706 bfd_release (abfd, i_shdrp);
3710 elf_elfsections (abfd) = i_shdrp;
3712 i_shdrp[elf_shstrtab_sec (abfd)] = &t->shstrtab_hdr;
3715 i_shdrp[elf_onesymtab (abfd)] = &t->symtab_hdr;
3716 if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF))
3718 elf_section_list * entry = elf_symtab_shndx_list (abfd);
3719 BFD_ASSERT (entry != NULL);
3720 i_shdrp[entry->ndx] = & entry->hdr;
3721 entry->hdr.sh_link = elf_onesymtab (abfd);
3723 i_shdrp[elf_strtab_sec (abfd)] = &t->strtab_hdr;
3724 t->symtab_hdr.sh_link = elf_strtab_sec (abfd);
3727 for (sec = abfd->sections; sec; sec = sec->next)
3731 d = elf_section_data (sec);
3733 i_shdrp[d->this_idx] = &d->this_hdr;
3734 if (d->rel.idx != 0)
3735 i_shdrp[d->rel.idx] = d->rel.hdr;
3736 if (d->rela.idx != 0)
3737 i_shdrp[d->rela.idx] = d->rela.hdr;
3739 /* Fill in the sh_link and sh_info fields while we're at it. */
3741 /* sh_link of a reloc section is the section index of the symbol
3742 table. sh_info is the section index of the section to which
3743 the relocation entries apply. */
3744 if (d->rel.idx != 0)
3746 d->rel.hdr->sh_link = elf_onesymtab (abfd);
3747 d->rel.hdr->sh_info = d->this_idx;
3748 d->rel.hdr->sh_flags |= SHF_INFO_LINK;
3750 if (d->rela.idx != 0)
3752 d->rela.hdr->sh_link = elf_onesymtab (abfd);
3753 d->rela.hdr->sh_info = d->this_idx;
3754 d->rela.hdr->sh_flags |= SHF_INFO_LINK;
3757 /* We need to set up sh_link for SHF_LINK_ORDER. */
3758 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3760 s = elf_linked_to_section (sec);
3763 /* elf_linked_to_section points to the input section. */
3764 if (link_info != NULL)
3766 /* Check discarded linkonce section. */
3767 if (discarded_section (s))
3771 /* xgettext:c-format */
3772 (_("%B: sh_link of section `%A' points to"
3773 " discarded section `%A' of `%B'"),
3774 abfd, d->this_hdr.bfd_section,
3776 /* Point to the kept section if it has the same
3777 size as the discarded one. */
3778 kept = _bfd_elf_check_kept_section (s, link_info);
3781 bfd_set_error (bfd_error_bad_value);
3787 s = s->output_section;
3788 BFD_ASSERT (s != NULL);
3792 /* Handle objcopy. */
3793 if (s->output_section == NULL)
3796 /* xgettext:c-format */
3797 (_("%B: sh_link of section `%A' points to"
3798 " removed section `%A' of `%B'"),
3799 abfd, d->this_hdr.bfd_section, s, s->owner);
3800 bfd_set_error (bfd_error_bad_value);
3803 s = s->output_section;
3805 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3810 The Intel C compiler generates SHT_IA_64_UNWIND with
3811 SHF_LINK_ORDER. But it doesn't set the sh_link or
3812 sh_info fields. Hence we could get the situation
3814 const struct elf_backend_data *bed
3815 = get_elf_backend_data (abfd);
3816 if (bed->link_order_error_handler)
3817 bed->link_order_error_handler
3818 /* xgettext:c-format */
3819 (_("%B: warning: sh_link not set for section `%A'"),
3824 switch (d->this_hdr.sh_type)
3828 /* A reloc section which we are treating as a normal BFD
3829 section. sh_link is the section index of the symbol
3830 table. sh_info is the section index of the section to
3831 which the relocation entries apply. We assume that an
3832 allocated reloc section uses the dynamic symbol table.
3833 FIXME: How can we be sure? */
3834 s = bfd_get_section_by_name (abfd, ".dynsym");
3836 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3838 s = elf_get_reloc_section (sec);
3841 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3842 d->this_hdr.sh_flags |= SHF_INFO_LINK;
3847 /* We assume that a section named .stab*str is a stabs
3848 string section. We look for a section with the same name
3849 but without the trailing ``str'', and set its sh_link
3850 field to point to this section. */
3851 if (CONST_STRNEQ (sec->name, ".stab")
3852 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3857 len = strlen (sec->name);
3858 alc = (char *) bfd_malloc (len - 2);
3861 memcpy (alc, sec->name, len - 3);
3862 alc[len - 3] = '\0';
3863 s = bfd_get_section_by_name (abfd, alc);
3867 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3869 /* This is a .stab section. */
3870 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3871 elf_section_data (s)->this_hdr.sh_entsize
3872 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3879 case SHT_GNU_verneed:
3880 case SHT_GNU_verdef:
3881 /* sh_link is the section header index of the string table
3882 used for the dynamic entries, or the symbol table, or the
3884 s = bfd_get_section_by_name (abfd, ".dynstr");
3886 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3889 case SHT_GNU_LIBLIST:
3890 /* sh_link is the section header index of the prelink library
3891 list used for the dynamic entries, or the symbol table, or
3892 the version strings. */
3893 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3894 ? ".dynstr" : ".gnu.libstr");
3896 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3901 case SHT_GNU_versym:
3902 /* sh_link is the section header index of the symbol table
3903 this hash table or version table is for. */
3904 s = bfd_get_section_by_name (abfd, ".dynsym");
3906 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3910 d->this_hdr.sh_link = elf_onesymtab (abfd);
3914 /* Delay setting sh_name to _bfd_elf_write_object_contents so that
3915 _bfd_elf_assign_file_positions_for_non_load can convert DWARF
3916 debug section name from .debug_* to .zdebug_* if needed. */
3922 sym_is_global (bfd *abfd, asymbol *sym)
3924 /* If the backend has a special mapping, use it. */
3925 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3926 if (bed->elf_backend_sym_is_global)
3927 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3929 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_GNU_UNIQUE)) != 0
3930 || bfd_is_und_section (bfd_get_section (sym))
3931 || bfd_is_com_section (bfd_get_section (sym)));
3934 /* Filter global symbols of ABFD to include in the import library. All
3935 SYMCOUNT symbols of ABFD can be examined from their pointers in
3936 SYMS. Pointers of symbols to keep should be stored contiguously at
3937 the beginning of that array.
3939 Returns the number of symbols to keep. */
3942 _bfd_elf_filter_global_symbols (bfd *abfd, struct bfd_link_info *info,
3943 asymbol **syms, long symcount)
3945 long src_count, dst_count = 0;
3947 for (src_count = 0; src_count < symcount; src_count++)
3949 asymbol *sym = syms[src_count];
3950 char *name = (char *) bfd_asymbol_name (sym);
3951 struct bfd_link_hash_entry *h;
3953 if (!sym_is_global (abfd, sym))
3956 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, FALSE);
3959 if (h->type != bfd_link_hash_defined && h->type != bfd_link_hash_defweak)
3961 if (h->linker_def || h->ldscript_def)
3964 syms[dst_count++] = sym;
3967 syms[dst_count] = NULL;
3972 /* Don't output section symbols for sections that are not going to be
3973 output, that are duplicates or there is no BFD section. */
3976 ignore_section_sym (bfd *abfd, asymbol *sym)
3978 elf_symbol_type *type_ptr;
3980 if ((sym->flags & BSF_SECTION_SYM) == 0)
3983 type_ptr = elf_symbol_from (abfd, sym);
3984 return ((type_ptr != NULL
3985 && type_ptr->internal_elf_sym.st_shndx != 0
3986 && bfd_is_abs_section (sym->section))
3987 || !(sym->section->owner == abfd
3988 || (sym->section->output_section->owner == abfd
3989 && sym->section->output_offset == 0)
3990 || bfd_is_abs_section (sym->section)));
3993 /* Map symbol from it's internal number to the external number, moving
3994 all local symbols to be at the head of the list. */
3997 elf_map_symbols (bfd *abfd, unsigned int *pnum_locals)
3999 unsigned int symcount = bfd_get_symcount (abfd);
4000 asymbol **syms = bfd_get_outsymbols (abfd);
4001 asymbol **sect_syms;
4002 unsigned int num_locals = 0;
4003 unsigned int num_globals = 0;
4004 unsigned int num_locals2 = 0;
4005 unsigned int num_globals2 = 0;
4006 unsigned int max_index = 0;
4012 fprintf (stderr, "elf_map_symbols\n");
4016 for (asect = abfd->sections; asect; asect = asect->next)
4018 if (max_index < asect->index)
4019 max_index = asect->index;
4023 sect_syms = (asymbol **) bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
4024 if (sect_syms == NULL)
4026 elf_section_syms (abfd) = sect_syms;
4027 elf_num_section_syms (abfd) = max_index;
4029 /* Init sect_syms entries for any section symbols we have already
4030 decided to output. */
4031 for (idx = 0; idx < symcount; idx++)
4033 asymbol *sym = syms[idx];
4035 if ((sym->flags & BSF_SECTION_SYM) != 0
4037 && !ignore_section_sym (abfd, sym)
4038 && !bfd_is_abs_section (sym->section))
4040 asection *sec = sym->section;
4042 if (sec->owner != abfd)
4043 sec = sec->output_section;
4045 sect_syms[sec->index] = syms[idx];
4049 /* Classify all of the symbols. */
4050 for (idx = 0; idx < symcount; idx++)
4052 if (sym_is_global (abfd, syms[idx]))
4054 else if (!ignore_section_sym (abfd, syms[idx]))
4058 /* We will be adding a section symbol for each normal BFD section. Most
4059 sections will already have a section symbol in outsymbols, but
4060 eg. SHT_GROUP sections will not, and we need the section symbol mapped
4061 at least in that case. */
4062 for (asect = abfd->sections; asect; asect = asect->next)
4064 if (sect_syms[asect->index] == NULL)
4066 if (!sym_is_global (abfd, asect->symbol))
4073 /* Now sort the symbols so the local symbols are first. */
4074 new_syms = (asymbol **) bfd_alloc2 (abfd, num_locals + num_globals,
4075 sizeof (asymbol *));
4077 if (new_syms == NULL)
4080 for (idx = 0; idx < symcount; idx++)
4082 asymbol *sym = syms[idx];
4085 if (sym_is_global (abfd, sym))
4086 i = num_locals + num_globals2++;
4087 else if (!ignore_section_sym (abfd, sym))
4092 sym->udata.i = i + 1;
4094 for (asect = abfd->sections; asect; asect = asect->next)
4096 if (sect_syms[asect->index] == NULL)
4098 asymbol *sym = asect->symbol;
4101 sect_syms[asect->index] = sym;
4102 if (!sym_is_global (abfd, sym))
4105 i = num_locals + num_globals2++;
4107 sym->udata.i = i + 1;
4111 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
4113 *pnum_locals = num_locals;
4117 /* Align to the maximum file alignment that could be required for any
4118 ELF data structure. */
4120 static inline file_ptr
4121 align_file_position (file_ptr off, int align)
4123 return (off + align - 1) & ~(align - 1);
4126 /* Assign a file position to a section, optionally aligning to the
4127 required section alignment. */
4130 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
4134 if (align && i_shdrp->sh_addralign > 1)
4135 offset = BFD_ALIGN (offset, i_shdrp->sh_addralign);
4136 i_shdrp->sh_offset = offset;
4137 if (i_shdrp->bfd_section != NULL)
4138 i_shdrp->bfd_section->filepos = offset;
4139 if (i_shdrp->sh_type != SHT_NOBITS)
4140 offset += i_shdrp->sh_size;
4144 /* Compute the file positions we are going to put the sections at, and
4145 otherwise prepare to begin writing out the ELF file. If LINK_INFO
4146 is not NULL, this is being called by the ELF backend linker. */
4149 _bfd_elf_compute_section_file_positions (bfd *abfd,
4150 struct bfd_link_info *link_info)
4152 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4153 struct fake_section_arg fsargs;
4155 struct elf_strtab_hash *strtab = NULL;
4156 Elf_Internal_Shdr *shstrtab_hdr;
4157 bfd_boolean need_symtab;
4159 if (abfd->output_has_begun)
4162 /* Do any elf backend specific processing first. */
4163 if (bed->elf_backend_begin_write_processing)
4164 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
4166 if (! prep_headers (abfd))
4169 /* Post process the headers if necessary. */
4170 (*bed->elf_backend_post_process_headers) (abfd, link_info);
4172 fsargs.failed = FALSE;
4173 fsargs.link_info = link_info;
4174 bfd_map_over_sections (abfd, elf_fake_sections, &fsargs);
4178 if (!assign_section_numbers (abfd, link_info))
4181 /* The backend linker builds symbol table information itself. */
4182 need_symtab = (link_info == NULL
4183 && (bfd_get_symcount (abfd) > 0
4184 || ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
4188 /* Non-zero if doing a relocatable link. */
4189 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
4191 if (! swap_out_syms (abfd, &strtab, relocatable_p))
4196 if (link_info == NULL)
4198 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
4203 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
4204 /* sh_name was set in prep_headers. */
4205 shstrtab_hdr->sh_type = SHT_STRTAB;
4206 shstrtab_hdr->sh_flags = bed->elf_strtab_flags;
4207 shstrtab_hdr->sh_addr = 0;
4208 /* sh_size is set in _bfd_elf_assign_file_positions_for_non_load. */
4209 shstrtab_hdr->sh_entsize = 0;
4210 shstrtab_hdr->sh_link = 0;
4211 shstrtab_hdr->sh_info = 0;
4212 /* sh_offset is set in _bfd_elf_assign_file_positions_for_non_load. */
4213 shstrtab_hdr->sh_addralign = 1;
4215 if (!assign_file_positions_except_relocs (abfd, link_info))
4221 Elf_Internal_Shdr *hdr;
4223 off = elf_next_file_pos (abfd);
4225 hdr = & elf_symtab_hdr (abfd);
4226 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4228 if (elf_symtab_shndx_list (abfd) != NULL)
4230 hdr = & elf_symtab_shndx_list (abfd)->hdr;
4231 if (hdr->sh_size != 0)
4232 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4233 /* FIXME: What about other symtab_shndx sections in the list ? */
4236 hdr = &elf_tdata (abfd)->strtab_hdr;
4237 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4239 elf_next_file_pos (abfd) = off;
4241 /* Now that we know where the .strtab section goes, write it
4243 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
4244 || ! _bfd_elf_strtab_emit (abfd, strtab))
4246 _bfd_elf_strtab_free (strtab);
4249 abfd->output_has_begun = TRUE;
4254 /* Make an initial estimate of the size of the program header. If we
4255 get the number wrong here, we'll redo section placement. */
4257 static bfd_size_type
4258 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
4262 const struct elf_backend_data *bed;
4264 /* Assume we will need exactly two PT_LOAD segments: one for text
4265 and one for data. */
4268 s = bfd_get_section_by_name (abfd, ".interp");
4269 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4271 /* If we have a loadable interpreter section, we need a
4272 PT_INTERP segment. In this case, assume we also need a
4273 PT_PHDR segment, although that may not be true for all
4278 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4280 /* We need a PT_DYNAMIC segment. */
4284 if (info != NULL && info->relro)
4286 /* We need a PT_GNU_RELRO segment. */
4290 if (elf_eh_frame_hdr (abfd))
4292 /* We need a PT_GNU_EH_FRAME segment. */
4296 if (elf_stack_flags (abfd))
4298 /* We need a PT_GNU_STACK segment. */
4302 for (s = abfd->sections; s != NULL; s = s->next)
4304 if ((s->flags & SEC_LOAD) != 0
4305 && CONST_STRNEQ (s->name, ".note"))
4307 /* We need a PT_NOTE segment. */
4309 /* Try to create just one PT_NOTE segment
4310 for all adjacent loadable .note* sections.
4311 gABI requires that within a PT_NOTE segment
4312 (and also inside of each SHT_NOTE section)
4313 each note is padded to a multiple of 4 size,
4314 so we check whether the sections are correctly
4316 if (s->alignment_power == 2)
4317 while (s->next != NULL
4318 && s->next->alignment_power == 2
4319 && (s->next->flags & SEC_LOAD) != 0
4320 && CONST_STRNEQ (s->next->name, ".note"))
4325 for (s = abfd->sections; s != NULL; s = s->next)
4327 if (s->flags & SEC_THREAD_LOCAL)
4329 /* We need a PT_TLS segment. */
4335 bed = get_elf_backend_data (abfd);
4337 if ((abfd->flags & D_PAGED) != 0)
4339 /* Add a PT_GNU_MBIND segment for each mbind section. */
4340 unsigned int page_align_power = bfd_log2 (bed->commonpagesize);
4341 for (s = abfd->sections; s != NULL; s = s->next)
4342 if (elf_section_flags (s) & SHF_GNU_MBIND)
4344 if (elf_section_data (s)->this_hdr.sh_info
4348 /* xgettext:c-format */
4349 (_("%B: GNU_MBIN section `%A' has invalid sh_info field: %d"),
4350 abfd, s, elf_section_data (s)->this_hdr.sh_info);
4353 /* Align mbind section to page size. */
4354 if (s->alignment_power < page_align_power)
4355 s->alignment_power = page_align_power;
4360 /* Let the backend count up any program headers it might need. */
4361 if (bed->elf_backend_additional_program_headers)
4365 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
4371 return segs * bed->s->sizeof_phdr;
4374 /* Find the segment that contains the output_section of section. */
4377 _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section)
4379 struct elf_segment_map *m;
4380 Elf_Internal_Phdr *p;
4382 for (m = elf_seg_map (abfd), p = elf_tdata (abfd)->phdr;
4388 for (i = m->count - 1; i >= 0; i--)
4389 if (m->sections[i] == section)
4396 /* Create a mapping from a set of sections to a program segment. */
4398 static struct elf_segment_map *
4399 make_mapping (bfd *abfd,
4400 asection **sections,
4405 struct elf_segment_map *m;
4410 amt = sizeof (struct elf_segment_map);
4411 amt += (to - from - 1) * sizeof (asection *);
4412 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4416 m->p_type = PT_LOAD;
4417 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
4418 m->sections[i - from] = *hdrpp;
4419 m->count = to - from;
4421 if (from == 0 && phdr)
4423 /* Include the headers in the first PT_LOAD segment. */
4424 m->includes_filehdr = 1;
4425 m->includes_phdrs = 1;
4431 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
4434 struct elf_segment_map *
4435 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
4437 struct elf_segment_map *m;
4439 m = (struct elf_segment_map *) bfd_zalloc (abfd,
4440 sizeof (struct elf_segment_map));
4444 m->p_type = PT_DYNAMIC;
4446 m->sections[0] = dynsec;
4451 /* Possibly add or remove segments from the segment map. */
4454 elf_modify_segment_map (bfd *abfd,
4455 struct bfd_link_info *info,
4456 bfd_boolean remove_empty_load)
4458 struct elf_segment_map **m;
4459 const struct elf_backend_data *bed;
4461 /* The placement algorithm assumes that non allocated sections are
4462 not in PT_LOAD segments. We ensure this here by removing such
4463 sections from the segment map. We also remove excluded
4464 sections. Finally, any PT_LOAD segment without sections is
4466 m = &elf_seg_map (abfd);
4469 unsigned int i, new_count;
4471 for (new_count = 0, i = 0; i < (*m)->count; i++)
4473 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
4474 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
4475 || (*m)->p_type != PT_LOAD))
4477 (*m)->sections[new_count] = (*m)->sections[i];
4481 (*m)->count = new_count;
4483 if (remove_empty_load
4484 && (*m)->p_type == PT_LOAD
4486 && !(*m)->includes_phdrs)
4492 bed = get_elf_backend_data (abfd);
4493 if (bed->elf_backend_modify_segment_map != NULL)
4495 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
4502 /* Set up a mapping from BFD sections to program segments. */
4505 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
4508 struct elf_segment_map *m;
4509 asection **sections = NULL;
4510 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4511 bfd_boolean no_user_phdrs;
4513 no_user_phdrs = elf_seg_map (abfd) == NULL;
4516 info->user_phdrs = !no_user_phdrs;
4518 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
4522 struct elf_segment_map *mfirst;
4523 struct elf_segment_map **pm;
4526 unsigned int phdr_index;
4527 bfd_vma maxpagesize;
4529 bfd_boolean phdr_in_segment = TRUE;
4530 bfd_boolean writable;
4532 asection *first_tls = NULL;
4533 asection *first_mbind = NULL;
4534 asection *dynsec, *eh_frame_hdr;
4536 bfd_vma addr_mask, wrap_to = 0;
4537 bfd_boolean linker_created_pt_phdr_segment = FALSE;
4539 /* Select the allocated sections, and sort them. */
4541 sections = (asection **) bfd_malloc2 (bfd_count_sections (abfd),
4542 sizeof (asection *));
4543 if (sections == NULL)
4546 /* Calculate top address, avoiding undefined behaviour of shift
4547 left operator when shift count is equal to size of type
4549 addr_mask = ((bfd_vma) 1 << (bfd_arch_bits_per_address (abfd) - 1)) - 1;
4550 addr_mask = (addr_mask << 1) + 1;
4553 for (s = abfd->sections; s != NULL; s = s->next)
4555 if ((s->flags & SEC_ALLOC) != 0)
4559 /* A wrapping section potentially clashes with header. */
4560 if (((s->lma + s->size) & addr_mask) < (s->lma & addr_mask))
4561 wrap_to = (s->lma + s->size) & addr_mask;
4564 BFD_ASSERT (i <= bfd_count_sections (abfd));
4567 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
4569 /* Build the mapping. */
4574 /* If we have a .interp section, then create a PT_PHDR segment for
4575 the program headers and a PT_INTERP segment for the .interp
4577 s = bfd_get_section_by_name (abfd, ".interp");
4578 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4580 amt = sizeof (struct elf_segment_map);
4581 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4585 m->p_type = PT_PHDR;
4586 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
4587 m->p_flags = PF_R | PF_X;
4588 m->p_flags_valid = 1;
4589 m->includes_phdrs = 1;
4590 linker_created_pt_phdr_segment = TRUE;
4594 amt = sizeof (struct elf_segment_map);
4595 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4599 m->p_type = PT_INTERP;
4607 /* Look through the sections. We put sections in the same program
4608 segment when the start of the second section can be placed within
4609 a few bytes of the end of the first section. */
4613 maxpagesize = bed->maxpagesize;
4614 /* PR 17512: file: c8455299.
4615 Avoid divide-by-zero errors later on.
4616 FIXME: Should we abort if the maxpagesize is zero ? */
4617 if (maxpagesize == 0)
4620 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
4622 && (dynsec->flags & SEC_LOAD) == 0)
4625 /* Deal with -Ttext or something similar such that the first section
4626 is not adjacent to the program headers. This is an
4627 approximation, since at this point we don't know exactly how many
4628 program headers we will need. */
4631 bfd_size_type phdr_size = elf_program_header_size (abfd);
4633 if (phdr_size == (bfd_size_type) -1)
4634 phdr_size = get_program_header_size (abfd, info);
4635 phdr_size += bed->s->sizeof_ehdr;
4636 if ((abfd->flags & D_PAGED) == 0
4637 || (sections[0]->lma & addr_mask) < phdr_size
4638 || ((sections[0]->lma & addr_mask) % maxpagesize
4639 < phdr_size % maxpagesize)
4640 || (sections[0]->lma & addr_mask & -maxpagesize) < wrap_to)
4642 /* PR 20815: The ELF standard says that a PT_PHDR segment, if
4643 present, must be included as part of the memory image of the
4644 program. Ie it must be part of a PT_LOAD segment as well.
4645 If we have had to create our own PT_PHDR segment, but it is
4646 not going to be covered by the first PT_LOAD segment, then
4647 force the inclusion if we can... */
4648 if ((abfd->flags & D_PAGED) != 0
4649 && linker_created_pt_phdr_segment)
4650 phdr_in_segment = TRUE;
4652 phdr_in_segment = FALSE;
4656 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
4659 bfd_boolean new_segment;
4663 /* See if this section and the last one will fit in the same
4666 if (last_hdr == NULL)
4668 /* If we don't have a segment yet, then we don't need a new
4669 one (we build the last one after this loop). */
4670 new_segment = FALSE;
4672 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
4674 /* If this section has a different relation between the
4675 virtual address and the load address, then we need a new
4679 else if (hdr->lma < last_hdr->lma + last_size
4680 || last_hdr->lma + last_size < last_hdr->lma)
4682 /* If this section has a load address that makes it overlap
4683 the previous section, then we need a new segment. */
4686 /* In the next test we have to be careful when last_hdr->lma is close
4687 to the end of the address space. If the aligned address wraps
4688 around to the start of the address space, then there are no more
4689 pages left in memory and it is OK to assume that the current
4690 section can be included in the current segment. */
4691 else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
4693 && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
4696 /* If putting this section in this segment would force us to
4697 skip a page in the segment, then we need a new segment. */
4700 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
4701 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0
4702 && ((abfd->flags & D_PAGED) == 0
4703 || (((last_hdr->lma + last_size - 1) & -maxpagesize)
4704 != (hdr->lma & -maxpagesize))))
4706 /* We don't want to put a loaded section after a
4707 nonloaded (ie. bss style) section in the same segment
4708 as that will force the non-loaded section to be loaded.
4709 Consider .tbss sections as loaded for this purpose.
4710 However, like the writable/non-writable case below,
4711 if they are on the same page then they must be put
4712 in the same segment. */
4715 else if ((abfd->flags & D_PAGED) == 0)
4717 /* If the file is not demand paged, which means that we
4718 don't require the sections to be correctly aligned in the
4719 file, then there is no other reason for a new segment. */
4720 new_segment = FALSE;
4723 && (hdr->flags & SEC_READONLY) == 0
4724 && (((last_hdr->lma + last_size - 1) & -maxpagesize)
4725 != (hdr->lma & -maxpagesize)))
4727 /* We don't want to put a writable section in a read only
4728 segment, unless they are on the same page in memory
4729 anyhow. We already know that the last section does not
4730 bring us past the current section on the page, so the
4731 only case in which the new section is not on the same
4732 page as the previous section is when the previous section
4733 ends precisely on a page boundary. */
4738 /* Otherwise, we can use the same segment. */
4739 new_segment = FALSE;
4742 /* Allow interested parties a chance to override our decision. */
4743 if (last_hdr != NULL
4745 && info->callbacks->override_segment_assignment != NULL)
4747 = info->callbacks->override_segment_assignment (info, abfd, hdr,
4753 if ((hdr->flags & SEC_READONLY) == 0)
4756 /* .tbss sections effectively have zero size. */
4757 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4758 != SEC_THREAD_LOCAL)
4759 last_size = hdr->size;
4765 /* We need a new program segment. We must create a new program
4766 header holding all the sections from phdr_index until hdr. */
4768 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4775 if ((hdr->flags & SEC_READONLY) == 0)
4781 /* .tbss sections effectively have zero size. */
4782 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
4783 last_size = hdr->size;
4787 phdr_in_segment = FALSE;
4790 /* Create a final PT_LOAD program segment, but not if it's just
4792 if (last_hdr != NULL
4793 && (i - phdr_index != 1
4794 || ((last_hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4795 != SEC_THREAD_LOCAL)))
4797 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4805 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
4808 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
4815 /* For each batch of consecutive loadable .note sections,
4816 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
4817 because if we link together nonloadable .note sections and
4818 loadable .note sections, we will generate two .note sections
4819 in the output file. FIXME: Using names for section types is
4821 for (s = abfd->sections; s != NULL; s = s->next)
4823 if ((s->flags & SEC_LOAD) != 0
4824 && CONST_STRNEQ (s->name, ".note"))
4829 amt = sizeof (struct elf_segment_map);
4830 if (s->alignment_power == 2)
4831 for (s2 = s; s2->next != NULL; s2 = s2->next)
4833 if (s2->next->alignment_power == 2
4834 && (s2->next->flags & SEC_LOAD) != 0
4835 && CONST_STRNEQ (s2->next->name, ".note")
4836 && align_power (s2->lma + s2->size, 2)
4842 amt += (count - 1) * sizeof (asection *);
4843 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4847 m->p_type = PT_NOTE;
4851 m->sections[m->count - count--] = s;
4852 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4855 m->sections[m->count - 1] = s;
4856 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4860 if (s->flags & SEC_THREAD_LOCAL)
4866 if (first_mbind == NULL
4867 && (elf_section_flags (s) & SHF_GNU_MBIND) != 0)
4871 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
4874 amt = sizeof (struct elf_segment_map);
4875 amt += (tls_count - 1) * sizeof (asection *);
4876 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4881 m->count = tls_count;
4882 /* Mandated PF_R. */
4884 m->p_flags_valid = 1;
4886 for (i = 0; i < (unsigned int) tls_count; ++i)
4888 if ((s->flags & SEC_THREAD_LOCAL) == 0)
4891 (_("%B: TLS sections are not adjacent:"), abfd);
4894 while (i < (unsigned int) tls_count)
4896 if ((s->flags & SEC_THREAD_LOCAL) != 0)
4898 _bfd_error_handler (_(" TLS: %A"), s);
4902 _bfd_error_handler (_(" non-TLS: %A"), s);
4905 bfd_set_error (bfd_error_bad_value);
4916 if (first_mbind && (abfd->flags & D_PAGED) != 0)
4917 for (s = first_mbind; s != NULL; s = s->next)
4918 if ((elf_section_flags (s) & SHF_GNU_MBIND) != 0
4919 && (elf_section_data (s)->this_hdr.sh_info
4920 <= PT_GNU_MBIND_NUM))
4922 /* Mandated PF_R. */
4923 unsigned long p_flags = PF_R;
4924 if ((s->flags & SEC_READONLY) == 0)
4926 if ((s->flags & SEC_CODE) != 0)
4929 amt = sizeof (struct elf_segment_map) + sizeof (asection *);
4930 m = bfd_zalloc (abfd, amt);
4934 m->p_type = (PT_GNU_MBIND_LO
4935 + elf_section_data (s)->this_hdr.sh_info);
4937 m->p_flags_valid = 1;
4939 m->p_flags = p_flags;
4945 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
4947 eh_frame_hdr = elf_eh_frame_hdr (abfd);
4948 if (eh_frame_hdr != NULL
4949 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
4951 amt = sizeof (struct elf_segment_map);
4952 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4956 m->p_type = PT_GNU_EH_FRAME;
4958 m->sections[0] = eh_frame_hdr->output_section;
4964 if (elf_stack_flags (abfd))
4966 amt = sizeof (struct elf_segment_map);
4967 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4971 m->p_type = PT_GNU_STACK;
4972 m->p_flags = elf_stack_flags (abfd);
4973 m->p_align = bed->stack_align;
4974 m->p_flags_valid = 1;
4975 m->p_align_valid = m->p_align != 0;
4976 if (info->stacksize > 0)
4978 m->p_size = info->stacksize;
4979 m->p_size_valid = 1;
4986 if (info != NULL && info->relro)
4988 for (m = mfirst; m != NULL; m = m->next)
4990 if (m->p_type == PT_LOAD
4992 && m->sections[0]->vma >= info->relro_start
4993 && m->sections[0]->vma < info->relro_end)
4996 while (--i != (unsigned) -1)
4997 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS))
4998 == (SEC_LOAD | SEC_HAS_CONTENTS))
5001 if (i != (unsigned) -1)
5006 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
5009 amt = sizeof (struct elf_segment_map);
5010 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
5014 m->p_type = PT_GNU_RELRO;
5021 elf_seg_map (abfd) = mfirst;
5024 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
5027 for (count = 0, m = elf_seg_map (abfd); m != NULL; m = m->next)
5029 elf_program_header_size (abfd) = count * bed->s->sizeof_phdr;
5034 if (sections != NULL)
5039 /* Sort sections by address. */
5042 elf_sort_sections (const void *arg1, const void *arg2)
5044 const asection *sec1 = *(const asection **) arg1;
5045 const asection *sec2 = *(const asection **) arg2;
5046 bfd_size_type size1, size2;
5048 /* Sort by LMA first, since this is the address used to
5049 place the section into a segment. */
5050 if (sec1->lma < sec2->lma)
5052 else if (sec1->lma > sec2->lma)
5055 /* Then sort by VMA. Normally the LMA and the VMA will be
5056 the same, and this will do nothing. */
5057 if (sec1->vma < sec2->vma)
5059 else if (sec1->vma > sec2->vma)
5062 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
5064 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
5070 /* If the indicies are the same, do not return 0
5071 here, but continue to try the next comparison. */
5072 if (sec1->target_index - sec2->target_index != 0)
5073 return sec1->target_index - sec2->target_index;
5078 else if (TOEND (sec2))
5083 /* Sort by size, to put zero sized sections
5084 before others at the same address. */
5086 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
5087 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
5094 return sec1->target_index - sec2->target_index;
5097 /* Ian Lance Taylor writes:
5099 We shouldn't be using % with a negative signed number. That's just
5100 not good. We have to make sure either that the number is not
5101 negative, or that the number has an unsigned type. When the types
5102 are all the same size they wind up as unsigned. When file_ptr is a
5103 larger signed type, the arithmetic winds up as signed long long,
5106 What we're trying to say here is something like ``increase OFF by
5107 the least amount that will cause it to be equal to the VMA modulo
5109 /* In other words, something like:
5111 vma_offset = m->sections[0]->vma % bed->maxpagesize;
5112 off_offset = off % bed->maxpagesize;
5113 if (vma_offset < off_offset)
5114 adjustment = vma_offset + bed->maxpagesize - off_offset;
5116 adjustment = vma_offset - off_offset;
5118 which can can be collapsed into the expression below. */
5121 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
5123 /* PR binutils/16199: Handle an alignment of zero. */
5124 if (maxpagesize == 0)
5126 return ((vma - off) % maxpagesize);
5130 print_segment_map (const struct elf_segment_map *m)
5133 const char *pt = get_segment_type (m->p_type);
5138 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
5139 sprintf (buf, "LOPROC+%7.7x",
5140 (unsigned int) (m->p_type - PT_LOPROC));
5141 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
5142 sprintf (buf, "LOOS+%7.7x",
5143 (unsigned int) (m->p_type - PT_LOOS));
5145 snprintf (buf, sizeof (buf), "%8.8x",
5146 (unsigned int) m->p_type);
5150 fprintf (stderr, "%s:", pt);
5151 for (j = 0; j < m->count; j++)
5152 fprintf (stderr, " %s", m->sections [j]->name);
5158 write_zeros (bfd *abfd, file_ptr pos, bfd_size_type len)
5163 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
5165 buf = bfd_zmalloc (len);
5168 ret = bfd_bwrite (buf, len, abfd) == len;
5173 /* Assign file positions to the sections based on the mapping from
5174 sections to segments. This function also sets up some fields in
5178 assign_file_positions_for_load_sections (bfd *abfd,
5179 struct bfd_link_info *link_info)
5181 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5182 struct elf_segment_map *m;
5183 Elf_Internal_Phdr *phdrs;
5184 Elf_Internal_Phdr *p;
5186 bfd_size_type maxpagesize;
5187 unsigned int pt_load_count = 0;
5190 bfd_vma header_pad = 0;
5192 if (link_info == NULL
5193 && !_bfd_elf_map_sections_to_segments (abfd, link_info))
5197 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
5201 header_pad = m->header_size;
5206 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
5207 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
5211 /* PR binutils/12467. */
5212 elf_elfheader (abfd)->e_phoff = 0;
5213 elf_elfheader (abfd)->e_phentsize = 0;
5216 elf_elfheader (abfd)->e_phnum = alloc;
5218 if (elf_program_header_size (abfd) == (bfd_size_type) -1)
5219 elf_program_header_size (abfd) = alloc * bed->s->sizeof_phdr;
5221 BFD_ASSERT (elf_program_header_size (abfd)
5222 >= alloc * bed->s->sizeof_phdr);
5226 elf_next_file_pos (abfd) = bed->s->sizeof_ehdr;
5230 /* We're writing the size in elf_program_header_size (abfd),
5231 see assign_file_positions_except_relocs, so make sure we have
5232 that amount allocated, with trailing space cleared.
5233 The variable alloc contains the computed need, while
5234 elf_program_header_size (abfd) contains the size used for the
5236 See ld/emultempl/elf-generic.em:gld${EMULATION_NAME}_map_segments
5237 where the layout is forced to according to a larger size in the
5238 last iterations for the testcase ld-elf/header. */
5239 BFD_ASSERT (elf_program_header_size (abfd) % bed->s->sizeof_phdr
5241 phdrs = (Elf_Internal_Phdr *)
5243 (elf_program_header_size (abfd) / bed->s->sizeof_phdr),
5244 sizeof (Elf_Internal_Phdr));
5245 elf_tdata (abfd)->phdr = phdrs;
5250 if ((abfd->flags & D_PAGED) != 0)
5251 maxpagesize = bed->maxpagesize;
5253 off = bed->s->sizeof_ehdr;
5254 off += alloc * bed->s->sizeof_phdr;
5255 if (header_pad < (bfd_vma) off)
5261 for (m = elf_seg_map (abfd), p = phdrs, j = 0;
5263 m = m->next, p++, j++)
5267 bfd_boolean no_contents;
5269 /* If elf_segment_map is not from map_sections_to_segments, the
5270 sections may not be correctly ordered. NOTE: sorting should
5271 not be done to the PT_NOTE section of a corefile, which may
5272 contain several pseudo-sections artificially created by bfd.
5273 Sorting these pseudo-sections breaks things badly. */
5275 && !(elf_elfheader (abfd)->e_type == ET_CORE
5276 && m->p_type == PT_NOTE))
5277 qsort (m->sections, (size_t) m->count, sizeof (asection *),
5280 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
5281 number of sections with contents contributing to both p_filesz
5282 and p_memsz, followed by a number of sections with no contents
5283 that just contribute to p_memsz. In this loop, OFF tracks next
5284 available file offset for PT_LOAD and PT_NOTE segments. */
5285 p->p_type = m->p_type;
5286 p->p_flags = m->p_flags;
5291 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
5293 if (m->p_paddr_valid)
5294 p->p_paddr = m->p_paddr;
5295 else if (m->count == 0)
5298 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
5300 if (p->p_type == PT_LOAD
5301 && (abfd->flags & D_PAGED) != 0)
5303 /* p_align in demand paged PT_LOAD segments effectively stores
5304 the maximum page size. When copying an executable with
5305 objcopy, we set m->p_align from the input file. Use this
5306 value for maxpagesize rather than bed->maxpagesize, which
5307 may be different. Note that we use maxpagesize for PT_TLS
5308 segment alignment later in this function, so we are relying
5309 on at least one PT_LOAD segment appearing before a PT_TLS
5311 if (m->p_align_valid)
5312 maxpagesize = m->p_align;
5314 p->p_align = maxpagesize;
5317 else if (m->p_align_valid)
5318 p->p_align = m->p_align;
5319 else if (m->count == 0)
5320 p->p_align = 1 << bed->s->log_file_align;
5324 no_contents = FALSE;
5326 if (p->p_type == PT_LOAD
5329 bfd_size_type align;
5330 unsigned int align_power = 0;
5332 if (m->p_align_valid)
5336 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
5338 unsigned int secalign;
5340 secalign = bfd_get_section_alignment (abfd, *secpp);
5341 if (secalign > align_power)
5342 align_power = secalign;
5344 align = (bfd_size_type) 1 << align_power;
5345 if (align < maxpagesize)
5346 align = maxpagesize;
5349 for (i = 0; i < m->count; i++)
5350 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
5351 /* If we aren't making room for this section, then
5352 it must be SHT_NOBITS regardless of what we've
5353 set via struct bfd_elf_special_section. */
5354 elf_section_type (m->sections[i]) = SHT_NOBITS;
5356 /* Find out whether this segment contains any loadable
5359 for (i = 0; i < m->count; i++)
5360 if (elf_section_type (m->sections[i]) != SHT_NOBITS)
5362 no_contents = FALSE;
5366 off_adjust = vma_page_aligned_bias (p->p_vaddr, off, align);
5368 /* Broken hardware and/or kernel require that files do not
5369 map the same page with different permissions on some hppa
5371 if (pt_load_count > 1
5372 && bed->no_page_alias
5373 && (off & (maxpagesize - 1)) != 0
5374 && (off & -maxpagesize) == ((off + off_adjust) & -maxpagesize))
5375 off_adjust += maxpagesize;
5379 /* We shouldn't need to align the segment on disk since
5380 the segment doesn't need file space, but the gABI
5381 arguably requires the alignment and glibc ld.so
5382 checks it. So to comply with the alignment
5383 requirement but not waste file space, we adjust
5384 p_offset for just this segment. (OFF_ADJUST is
5385 subtracted from OFF later.) This may put p_offset
5386 past the end of file, but that shouldn't matter. */
5391 /* Make sure the .dynamic section is the first section in the
5392 PT_DYNAMIC segment. */
5393 else if (p->p_type == PT_DYNAMIC
5395 && strcmp (m->sections[0]->name, ".dynamic") != 0)
5398 (_("%B: The first section in the PT_DYNAMIC segment"
5399 " is not the .dynamic section"),
5401 bfd_set_error (bfd_error_bad_value);
5404 /* Set the note section type to SHT_NOTE. */
5405 else if (p->p_type == PT_NOTE)
5406 for (i = 0; i < m->count; i++)
5407 elf_section_type (m->sections[i]) = SHT_NOTE;
5413 if (m->includes_filehdr)
5415 if (!m->p_flags_valid)
5417 p->p_filesz = bed->s->sizeof_ehdr;
5418 p->p_memsz = bed->s->sizeof_ehdr;
5421 if (p->p_vaddr < (bfd_vma) off
5422 || (!m->p_paddr_valid
5423 && p->p_paddr < (bfd_vma) off))
5426 (_("%B: Not enough room for program headers,"
5427 " try linking with -N"),
5429 bfd_set_error (bfd_error_bad_value);
5434 if (!m->p_paddr_valid)
5439 if (m->includes_phdrs)
5441 if (!m->p_flags_valid)
5444 if (!m->includes_filehdr)
5446 p->p_offset = bed->s->sizeof_ehdr;
5450 p->p_vaddr -= off - p->p_offset;
5451 if (!m->p_paddr_valid)
5452 p->p_paddr -= off - p->p_offset;
5456 p->p_filesz += alloc * bed->s->sizeof_phdr;
5457 p->p_memsz += alloc * bed->s->sizeof_phdr;
5460 p->p_filesz += header_pad;
5461 p->p_memsz += header_pad;
5465 if (p->p_type == PT_LOAD
5466 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
5468 if (!m->includes_filehdr && !m->includes_phdrs)
5474 adjust = off - (p->p_offset + p->p_filesz);
5476 p->p_filesz += adjust;
5477 p->p_memsz += adjust;
5481 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
5482 maps. Set filepos for sections in PT_LOAD segments, and in
5483 core files, for sections in PT_NOTE segments.
5484 assign_file_positions_for_non_load_sections will set filepos
5485 for other sections and update p_filesz for other segments. */
5486 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
5489 bfd_size_type align;
5490 Elf_Internal_Shdr *this_hdr;
5493 this_hdr = &elf_section_data (sec)->this_hdr;
5494 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
5496 if ((p->p_type == PT_LOAD
5497 || p->p_type == PT_TLS)
5498 && (this_hdr->sh_type != SHT_NOBITS
5499 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
5500 && ((this_hdr->sh_flags & SHF_TLS) == 0
5501 || p->p_type == PT_TLS))))
5503 bfd_vma p_start = p->p_paddr;
5504 bfd_vma p_end = p_start + p->p_memsz;
5505 bfd_vma s_start = sec->lma;
5506 bfd_vma adjust = s_start - p_end;
5510 || p_end < p_start))
5513 /* xgettext:c-format */
5514 (_("%B: section %A lma %#Lx adjusted to %#Lx"),
5515 abfd, sec, s_start, p_end);
5519 p->p_memsz += adjust;
5521 if (this_hdr->sh_type != SHT_NOBITS)
5523 if (p->p_filesz + adjust < p->p_memsz)
5525 /* We have a PROGBITS section following NOBITS ones.
5526 Allocate file space for the NOBITS section(s) and
5528 adjust = p->p_memsz - p->p_filesz;
5529 if (!write_zeros (abfd, off, adjust))
5533 p->p_filesz += adjust;
5537 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
5539 /* The section at i == 0 is the one that actually contains
5543 this_hdr->sh_offset = sec->filepos = off;
5544 off += this_hdr->sh_size;
5545 p->p_filesz = this_hdr->sh_size;
5551 /* The rest are fake sections that shouldn't be written. */
5560 if (p->p_type == PT_LOAD)
5562 this_hdr->sh_offset = sec->filepos = off;
5563 if (this_hdr->sh_type != SHT_NOBITS)
5564 off += this_hdr->sh_size;
5566 else if (this_hdr->sh_type == SHT_NOBITS
5567 && (this_hdr->sh_flags & SHF_TLS) != 0
5568 && this_hdr->sh_offset == 0)
5570 /* This is a .tbss section that didn't get a PT_LOAD.
5571 (See _bfd_elf_map_sections_to_segments "Create a
5572 final PT_LOAD".) Set sh_offset to the value it
5573 would have if we had created a zero p_filesz and
5574 p_memsz PT_LOAD header for the section. This
5575 also makes the PT_TLS header have the same
5577 bfd_vma adjust = vma_page_aligned_bias (this_hdr->sh_addr,
5579 this_hdr->sh_offset = sec->filepos = off + adjust;
5582 if (this_hdr->sh_type != SHT_NOBITS)
5584 p->p_filesz += this_hdr->sh_size;
5585 /* A load section without SHF_ALLOC is something like
5586 a note section in a PT_NOTE segment. These take
5587 file space but are not loaded into memory. */
5588 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
5589 p->p_memsz += this_hdr->sh_size;
5591 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
5593 if (p->p_type == PT_TLS)
5594 p->p_memsz += this_hdr->sh_size;
5596 /* .tbss is special. It doesn't contribute to p_memsz of
5598 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
5599 p->p_memsz += this_hdr->sh_size;
5602 if (align > p->p_align
5603 && !m->p_align_valid
5604 && (p->p_type != PT_LOAD
5605 || (abfd->flags & D_PAGED) == 0))
5609 if (!m->p_flags_valid)
5612 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
5614 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
5621 /* Check that all sections are in a PT_LOAD segment.
5622 Don't check funky gdb generated core files. */
5623 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
5625 bfd_boolean check_vma = TRUE;
5627 for (i = 1; i < m->count; i++)
5628 if (m->sections[i]->vma == m->sections[i - 1]->vma
5629 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i])
5630 ->this_hdr), p) != 0
5631 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i - 1])
5632 ->this_hdr), p) != 0)
5634 /* Looks like we have overlays packed into the segment. */
5639 for (i = 0; i < m->count; i++)
5641 Elf_Internal_Shdr *this_hdr;
5644 sec = m->sections[i];
5645 this_hdr = &(elf_section_data(sec)->this_hdr);
5646 if (!ELF_SECTION_IN_SEGMENT_1 (this_hdr, p, check_vma, 0)
5647 && !ELF_TBSS_SPECIAL (this_hdr, p))
5650 /* xgettext:c-format */
5651 (_("%B: section `%A' can't be allocated in segment %d"),
5653 print_segment_map (m);
5659 elf_next_file_pos (abfd) = off;
5663 /* Assign file positions for the other sections. */
5666 assign_file_positions_for_non_load_sections (bfd *abfd,
5667 struct bfd_link_info *link_info)
5669 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5670 Elf_Internal_Shdr **i_shdrpp;
5671 Elf_Internal_Shdr **hdrpp, **end_hdrpp;
5672 Elf_Internal_Phdr *phdrs;
5673 Elf_Internal_Phdr *p;
5674 struct elf_segment_map *m;
5675 struct elf_segment_map *hdrs_segment;
5676 bfd_vma filehdr_vaddr, filehdr_paddr;
5677 bfd_vma phdrs_vaddr, phdrs_paddr;
5681 i_shdrpp = elf_elfsections (abfd);
5682 end_hdrpp = i_shdrpp + elf_numsections (abfd);
5683 off = elf_next_file_pos (abfd);
5684 for (hdrpp = i_shdrpp + 1; hdrpp < end_hdrpp; hdrpp++)
5686 Elf_Internal_Shdr *hdr;
5689 if (hdr->bfd_section != NULL
5690 && (hdr->bfd_section->filepos != 0
5691 || (hdr->sh_type == SHT_NOBITS
5692 && hdr->contents == NULL)))
5693 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
5694 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
5696 if (hdr->sh_size != 0)
5698 /* xgettext:c-format */
5699 (_("%B: warning: allocated section `%s' not in segment"),
5701 (hdr->bfd_section == NULL
5703 : hdr->bfd_section->name));
5704 /* We don't need to page align empty sections. */
5705 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
5706 off += vma_page_aligned_bias (hdr->sh_addr, off,
5709 off += vma_page_aligned_bias (hdr->sh_addr, off,
5711 off = _bfd_elf_assign_file_position_for_section (hdr, off,
5714 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
5715 && hdr->bfd_section == NULL)
5716 || (hdr->bfd_section != NULL
5717 && (hdr->bfd_section->flags & SEC_ELF_COMPRESS))
5718 /* Compress DWARF debug sections. */
5719 || hdr == i_shdrpp[elf_onesymtab (abfd)]
5720 || (elf_symtab_shndx_list (abfd) != NULL
5721 && hdr == i_shdrpp[elf_symtab_shndx_list (abfd)->ndx])
5722 || hdr == i_shdrpp[elf_strtab_sec (abfd)]
5723 || hdr == i_shdrpp[elf_shstrtab_sec (abfd)])
5724 hdr->sh_offset = -1;
5726 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
5729 /* Now that we have set the section file positions, we can set up
5730 the file positions for the non PT_LOAD segments. */
5734 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
5736 hdrs_segment = NULL;
5737 phdrs = elf_tdata (abfd)->phdr;
5738 for (m = elf_seg_map (abfd), p = phdrs; m != NULL; m = m->next, p++)
5741 if (p->p_type != PT_LOAD)
5744 if (m->includes_filehdr)
5746 filehdr_vaddr = p->p_vaddr;
5747 filehdr_paddr = p->p_paddr;
5749 if (m->includes_phdrs)
5751 phdrs_vaddr = p->p_vaddr;
5752 phdrs_paddr = p->p_paddr;
5753 if (m->includes_filehdr)
5756 phdrs_vaddr += bed->s->sizeof_ehdr;
5757 phdrs_paddr += bed->s->sizeof_ehdr;
5762 if (hdrs_segment != NULL && link_info != NULL)
5764 /* There is a segment that contains both the file headers and the
5765 program headers, so provide a symbol __ehdr_start pointing there.
5766 A program can use this to examine itself robustly. */
5768 struct elf_link_hash_entry *hash
5769 = elf_link_hash_lookup (elf_hash_table (link_info), "__ehdr_start",
5770 FALSE, FALSE, TRUE);
5771 /* If the symbol was referenced and not defined, define it. */
5773 && (hash->root.type == bfd_link_hash_new
5774 || hash->root.type == bfd_link_hash_undefined
5775 || hash->root.type == bfd_link_hash_undefweak
5776 || hash->root.type == bfd_link_hash_common))
5779 if (hdrs_segment->count != 0)
5780 /* The segment contains sections, so use the first one. */
5781 s = hdrs_segment->sections[0];
5783 /* Use the first (i.e. lowest-addressed) section in any segment. */
5784 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
5793 hash->root.u.def.value = filehdr_vaddr - s->vma;
5794 hash->root.u.def.section = s;
5798 hash->root.u.def.value = filehdr_vaddr;
5799 hash->root.u.def.section = bfd_abs_section_ptr;
5802 hash->root.type = bfd_link_hash_defined;
5803 hash->def_regular = 1;
5808 for (m = elf_seg_map (abfd), p = phdrs; m != NULL; m = m->next, p++)
5810 if (p->p_type == PT_GNU_RELRO)
5812 const Elf_Internal_Phdr *lp;
5813 struct elf_segment_map *lm;
5815 if (link_info != NULL)
5817 /* During linking the range of the RELRO segment is passed
5819 for (lm = elf_seg_map (abfd), lp = phdrs;
5821 lm = lm->next, lp++)
5823 if (lp->p_type == PT_LOAD
5824 && lp->p_vaddr < link_info->relro_end
5826 && lm->sections[0]->vma >= link_info->relro_start)
5830 BFD_ASSERT (lm != NULL);
5834 /* Otherwise we are copying an executable or shared
5835 library, but we need to use the same linker logic. */
5836 for (lp = phdrs; lp < phdrs + count; ++lp)
5838 if (lp->p_type == PT_LOAD
5839 && lp->p_paddr == p->p_paddr)
5844 if (lp < phdrs + count)
5846 p->p_vaddr = lp->p_vaddr;
5847 p->p_paddr = lp->p_paddr;
5848 p->p_offset = lp->p_offset;
5849 if (link_info != NULL)
5850 p->p_filesz = link_info->relro_end - lp->p_vaddr;
5851 else if (m->p_size_valid)
5852 p->p_filesz = m->p_size;
5855 p->p_memsz = p->p_filesz;
5856 /* Preserve the alignment and flags if they are valid. The
5857 gold linker generates RW/4 for the PT_GNU_RELRO section.
5858 It is better for objcopy/strip to honor these attributes
5859 otherwise gdb will choke when using separate debug files.
5861 if (!m->p_align_valid)
5863 if (!m->p_flags_valid)
5868 memset (p, 0, sizeof *p);
5869 p->p_type = PT_NULL;
5872 else if (p->p_type == PT_GNU_STACK)
5874 if (m->p_size_valid)
5875 p->p_memsz = m->p_size;
5877 else if (m->count != 0)
5881 if (p->p_type != PT_LOAD
5882 && (p->p_type != PT_NOTE
5883 || bfd_get_format (abfd) != bfd_core))
5885 /* A user specified segment layout may include a PHDR
5886 segment that overlaps with a LOAD segment... */
5887 if (p->p_type == PT_PHDR)
5893 if (m->includes_filehdr || m->includes_phdrs)
5895 /* PR 17512: file: 2195325e. */
5897 (_("%B: error: non-load segment %d includes file header "
5898 "and/or program header"),
5899 abfd, (int) (p - phdrs));
5904 p->p_offset = m->sections[0]->filepos;
5905 for (i = m->count; i-- != 0;)
5907 asection *sect = m->sections[i];
5908 Elf_Internal_Shdr *hdr = &elf_section_data (sect)->this_hdr;
5909 if (hdr->sh_type != SHT_NOBITS)
5911 p->p_filesz = (sect->filepos - m->sections[0]->filepos
5918 else if (m->includes_filehdr)
5920 p->p_vaddr = filehdr_vaddr;
5921 if (! m->p_paddr_valid)
5922 p->p_paddr = filehdr_paddr;
5924 else if (m->includes_phdrs)
5926 p->p_vaddr = phdrs_vaddr;
5927 if (! m->p_paddr_valid)
5928 p->p_paddr = phdrs_paddr;
5932 elf_next_file_pos (abfd) = off;
5937 static elf_section_list *
5938 find_section_in_list (unsigned int i, elf_section_list * list)
5940 for (;list != NULL; list = list->next)
5946 /* Work out the file positions of all the sections. This is called by
5947 _bfd_elf_compute_section_file_positions. All the section sizes and
5948 VMAs must be known before this is called.
5950 Reloc sections come in two flavours: Those processed specially as
5951 "side-channel" data attached to a section to which they apply, and
5952 those that bfd doesn't process as relocations. The latter sort are
5953 stored in a normal bfd section by bfd_section_from_shdr. We don't
5954 consider the former sort here, unless they form part of the loadable
5955 image. Reloc sections not assigned here will be handled later by
5956 assign_file_positions_for_relocs.
5958 We also don't set the positions of the .symtab and .strtab here. */
5961 assign_file_positions_except_relocs (bfd *abfd,
5962 struct bfd_link_info *link_info)
5964 struct elf_obj_tdata *tdata = elf_tdata (abfd);
5965 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5966 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5968 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
5969 && bfd_get_format (abfd) != bfd_core)
5971 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
5972 unsigned int num_sec = elf_numsections (abfd);
5973 Elf_Internal_Shdr **hdrpp;
5977 /* Start after the ELF header. */
5978 off = i_ehdrp->e_ehsize;
5980 /* We are not creating an executable, which means that we are
5981 not creating a program header, and that the actual order of
5982 the sections in the file is unimportant. */
5983 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
5985 Elf_Internal_Shdr *hdr;
5988 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
5989 && hdr->bfd_section == NULL)
5990 || (hdr->bfd_section != NULL
5991 && (hdr->bfd_section->flags & SEC_ELF_COMPRESS))
5992 /* Compress DWARF debug sections. */
5993 || i == elf_onesymtab (abfd)
5994 || (elf_symtab_shndx_list (abfd) != NULL
5995 && hdr == i_shdrpp[elf_symtab_shndx_list (abfd)->ndx])
5996 || i == elf_strtab_sec (abfd)
5997 || i == elf_shstrtab_sec (abfd))
5999 hdr->sh_offset = -1;
6002 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
6005 elf_next_file_pos (abfd) = off;
6011 /* Assign file positions for the loaded sections based on the
6012 assignment of sections to segments. */
6013 if (!assign_file_positions_for_load_sections (abfd, link_info))
6016 /* And for non-load sections. */
6017 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
6020 if (bed->elf_backend_modify_program_headers != NULL)
6022 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
6026 /* Set e_type in ELF header to ET_EXEC for -pie -Ttext-segment=. */
6027 if (link_info != NULL && bfd_link_pie (link_info))
6029 unsigned int num_segments = elf_elfheader (abfd)->e_phnum;
6030 Elf_Internal_Phdr *segment = elf_tdata (abfd)->phdr;
6031 Elf_Internal_Phdr *end_segment = &segment[num_segments];
6033 /* Find the lowest p_vaddr in PT_LOAD segments. */
6034 bfd_vma p_vaddr = (bfd_vma) -1;
6035 for (; segment < end_segment; segment++)
6036 if (segment->p_type == PT_LOAD && p_vaddr > segment->p_vaddr)
6037 p_vaddr = segment->p_vaddr;
6039 /* Set e_type to ET_EXEC if the lowest p_vaddr in PT_LOAD
6040 segments is non-zero. */
6042 i_ehdrp->e_type = ET_EXEC;
6045 /* Write out the program headers. */
6046 alloc = elf_program_header_size (abfd) / bed->s->sizeof_phdr;
6048 /* Sort the program headers into the ordering required by the ELF standard. */
6052 /* PR ld/20815 - Check that the program header segment, if present, will
6053 be loaded into memory. FIXME: The check below is not sufficient as
6054 really all PT_LOAD segments should be checked before issuing an error
6055 message. Plus the PHDR segment does not have to be the first segment
6056 in the program header table. But this version of the check should
6057 catch all real world use cases.
6059 FIXME: We used to have code here to sort the PT_LOAD segments into
6060 ascending order, as per the ELF spec. But this breaks some programs,
6061 including the Linux kernel. But really either the spec should be
6062 changed or the programs updated. */
6064 && tdata->phdr[0].p_type == PT_PHDR
6065 && ! bed->elf_backend_allow_non_load_phdr (abfd, tdata->phdr, alloc)
6066 && tdata->phdr[1].p_type == PT_LOAD
6067 && (tdata->phdr[1].p_vaddr > tdata->phdr[0].p_vaddr
6068 || (tdata->phdr[1].p_vaddr + tdata->phdr[1].p_memsz)
6069 < (tdata->phdr[0].p_vaddr + tdata->phdr[0].p_memsz)))
6071 /* The fix for this error is usually to edit the linker script being
6072 used and set up the program headers manually. Either that or
6073 leave room for the headers at the start of the SECTIONS. */
6074 _bfd_error_handler (_("\
6075 %B: error: PHDR segment not covered by LOAD segment"),
6080 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
6081 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
6089 prep_headers (bfd *abfd)
6091 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form. */
6092 struct elf_strtab_hash *shstrtab;
6093 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6095 i_ehdrp = elf_elfheader (abfd);
6097 shstrtab = _bfd_elf_strtab_init ();
6098 if (shstrtab == NULL)
6101 elf_shstrtab (abfd) = shstrtab;
6103 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
6104 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
6105 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
6106 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
6108 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
6109 i_ehdrp->e_ident[EI_DATA] =
6110 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
6111 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
6113 if ((abfd->flags & DYNAMIC) != 0)
6114 i_ehdrp->e_type = ET_DYN;
6115 else if ((abfd->flags & EXEC_P) != 0)
6116 i_ehdrp->e_type = ET_EXEC;
6117 else if (bfd_get_format (abfd) == bfd_core)
6118 i_ehdrp->e_type = ET_CORE;
6120 i_ehdrp->e_type = ET_REL;
6122 switch (bfd_get_arch (abfd))
6124 case bfd_arch_unknown:
6125 i_ehdrp->e_machine = EM_NONE;
6128 /* There used to be a long list of cases here, each one setting
6129 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
6130 in the corresponding bfd definition. To avoid duplication,
6131 the switch was removed. Machines that need special handling
6132 can generally do it in elf_backend_final_write_processing(),
6133 unless they need the information earlier than the final write.
6134 Such need can generally be supplied by replacing the tests for
6135 e_machine with the conditions used to determine it. */
6137 i_ehdrp->e_machine = bed->elf_machine_code;
6140 i_ehdrp->e_version = bed->s->ev_current;
6141 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
6143 /* No program header, for now. */
6144 i_ehdrp->e_phoff = 0;
6145 i_ehdrp->e_phentsize = 0;
6146 i_ehdrp->e_phnum = 0;
6148 /* Each bfd section is section header entry. */
6149 i_ehdrp->e_entry = bfd_get_start_address (abfd);
6150 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
6152 /* If we're building an executable, we'll need a program header table. */
6153 if (abfd->flags & EXEC_P)
6154 /* It all happens later. */
6158 i_ehdrp->e_phentsize = 0;
6159 i_ehdrp->e_phoff = 0;
6162 elf_tdata (abfd)->symtab_hdr.sh_name =
6163 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
6164 elf_tdata (abfd)->strtab_hdr.sh_name =
6165 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
6166 elf_tdata (abfd)->shstrtab_hdr.sh_name =
6167 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
6168 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
6169 || elf_tdata (abfd)->strtab_hdr.sh_name == (unsigned int) -1
6170 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
6176 /* Assign file positions for all the reloc sections which are not part
6177 of the loadable file image, and the file position of section headers. */
6180 _bfd_elf_assign_file_positions_for_non_load (bfd *abfd)
6183 Elf_Internal_Shdr **shdrpp, **end_shdrpp;
6184 Elf_Internal_Shdr *shdrp;
6185 Elf_Internal_Ehdr *i_ehdrp;
6186 const struct elf_backend_data *bed;
6188 off = elf_next_file_pos (abfd);
6190 shdrpp = elf_elfsections (abfd);
6191 end_shdrpp = shdrpp + elf_numsections (abfd);
6192 for (shdrpp++; shdrpp < end_shdrpp; shdrpp++)
6195 if (shdrp->sh_offset == -1)
6197 asection *sec = shdrp->bfd_section;
6198 bfd_boolean is_rel = (shdrp->sh_type == SHT_REL
6199 || shdrp->sh_type == SHT_RELA);
6201 || (sec != NULL && (sec->flags & SEC_ELF_COMPRESS)))
6205 const char *name = sec->name;
6206 struct bfd_elf_section_data *d;
6208 /* Compress DWARF debug sections. */
6209 if (!bfd_compress_section (abfd, sec,
6213 if (sec->compress_status == COMPRESS_SECTION_DONE
6214 && (abfd->flags & BFD_COMPRESS_GABI) == 0)
6216 /* If section is compressed with zlib-gnu, convert
6217 section name from .debug_* to .zdebug_*. */
6219 = convert_debug_to_zdebug (abfd, name);
6220 if (new_name == NULL)
6224 /* Add section name to section name section. */
6225 if (shdrp->sh_name != (unsigned int) -1)
6228 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
6230 d = elf_section_data (sec);
6232 /* Add reloc section name to section name section. */
6234 && !_bfd_elf_set_reloc_sh_name (abfd,
6239 && !_bfd_elf_set_reloc_sh_name (abfd,
6244 /* Update section size and contents. */
6245 shdrp->sh_size = sec->size;
6246 shdrp->contents = sec->contents;
6247 shdrp->bfd_section->contents = NULL;
6249 off = _bfd_elf_assign_file_position_for_section (shdrp,
6256 /* Place section name section after DWARF debug sections have been
6258 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
6259 shdrp = &elf_tdata (abfd)->shstrtab_hdr;
6260 shdrp->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
6261 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
6263 /* Place the section headers. */
6264 i_ehdrp = elf_elfheader (abfd);
6265 bed = get_elf_backend_data (abfd);
6266 off = align_file_position (off, 1 << bed->s->log_file_align);
6267 i_ehdrp->e_shoff = off;
6268 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
6269 elf_next_file_pos (abfd) = off;
6275 _bfd_elf_write_object_contents (bfd *abfd)
6277 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6278 Elf_Internal_Shdr **i_shdrp;
6280 unsigned int count, num_sec;
6281 struct elf_obj_tdata *t;
6283 if (! abfd->output_has_begun
6284 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6287 i_shdrp = elf_elfsections (abfd);
6290 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
6294 if (!_bfd_elf_assign_file_positions_for_non_load (abfd))
6297 /* After writing the headers, we need to write the sections too... */
6298 num_sec = elf_numsections (abfd);
6299 for (count = 1; count < num_sec; count++)
6301 i_shdrp[count]->sh_name
6302 = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
6303 i_shdrp[count]->sh_name);
6304 if (bed->elf_backend_section_processing)
6305 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
6306 if (i_shdrp[count]->contents)
6308 bfd_size_type amt = i_shdrp[count]->sh_size;
6310 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
6311 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
6316 /* Write out the section header names. */
6317 t = elf_tdata (abfd);
6318 if (elf_shstrtab (abfd) != NULL
6319 && (bfd_seek (abfd, t->shstrtab_hdr.sh_offset, SEEK_SET) != 0
6320 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
6323 if (bed->elf_backend_final_write_processing)
6324 (*bed->elf_backend_final_write_processing) (abfd, elf_linker (abfd));
6326 if (!bed->s->write_shdrs_and_ehdr (abfd))
6329 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
6330 if (t->o->build_id.after_write_object_contents != NULL)
6331 return (*t->o->build_id.after_write_object_contents) (abfd);
6337 _bfd_elf_write_corefile_contents (bfd *abfd)
6339 /* Hopefully this can be done just like an object file. */
6340 return _bfd_elf_write_object_contents (abfd);
6343 /* Given a section, search the header to find them. */
6346 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
6348 const struct elf_backend_data *bed;
6349 unsigned int sec_index;
6351 if (elf_section_data (asect) != NULL
6352 && elf_section_data (asect)->this_idx != 0)
6353 return elf_section_data (asect)->this_idx;
6355 if (bfd_is_abs_section (asect))
6356 sec_index = SHN_ABS;
6357 else if (bfd_is_com_section (asect))
6358 sec_index = SHN_COMMON;
6359 else if (bfd_is_und_section (asect))
6360 sec_index = SHN_UNDEF;
6362 sec_index = SHN_BAD;
6364 bed = get_elf_backend_data (abfd);
6365 if (bed->elf_backend_section_from_bfd_section)
6367 int retval = sec_index;
6369 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
6373 if (sec_index == SHN_BAD)
6374 bfd_set_error (bfd_error_nonrepresentable_section);
6379 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
6383 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
6385 asymbol *asym_ptr = *asym_ptr_ptr;
6387 flagword flags = asym_ptr->flags;
6389 /* When gas creates relocations against local labels, it creates its
6390 own symbol for the section, but does put the symbol into the
6391 symbol chain, so udata is 0. When the linker is generating
6392 relocatable output, this section symbol may be for one of the
6393 input sections rather than the output section. */
6394 if (asym_ptr->udata.i == 0
6395 && (flags & BSF_SECTION_SYM)
6396 && asym_ptr->section)
6401 sec = asym_ptr->section;
6402 if (sec->owner != abfd && sec->output_section != NULL)
6403 sec = sec->output_section;
6404 if (sec->owner == abfd
6405 && (indx = sec->index) < elf_num_section_syms (abfd)
6406 && elf_section_syms (abfd)[indx] != NULL)
6407 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
6410 idx = asym_ptr->udata.i;
6414 /* This case can occur when using --strip-symbol on a symbol
6415 which is used in a relocation entry. */
6417 /* xgettext:c-format */
6418 (_("%B: symbol `%s' required but not present"),
6419 abfd, bfd_asymbol_name (asym_ptr));
6420 bfd_set_error (bfd_error_no_symbols);
6427 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8x\n",
6428 (long) asym_ptr, asym_ptr->name, idx, flags);
6436 /* Rewrite program header information. */
6439 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
6441 Elf_Internal_Ehdr *iehdr;
6442 struct elf_segment_map *map;
6443 struct elf_segment_map *map_first;
6444 struct elf_segment_map **pointer_to_map;
6445 Elf_Internal_Phdr *segment;
6448 unsigned int num_segments;
6449 bfd_boolean phdr_included = FALSE;
6450 bfd_boolean p_paddr_valid;
6451 bfd_vma maxpagesize;
6452 struct elf_segment_map *phdr_adjust_seg = NULL;
6453 unsigned int phdr_adjust_num = 0;
6454 const struct elf_backend_data *bed;
6456 bed = get_elf_backend_data (ibfd);
6457 iehdr = elf_elfheader (ibfd);
6460 pointer_to_map = &map_first;
6462 num_segments = elf_elfheader (ibfd)->e_phnum;
6463 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
6465 /* Returns the end address of the segment + 1. */
6466 #define SEGMENT_END(segment, start) \
6467 (start + (segment->p_memsz > segment->p_filesz \
6468 ? segment->p_memsz : segment->p_filesz))
6470 #define SECTION_SIZE(section, segment) \
6471 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
6472 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
6473 ? section->size : 0)
6475 /* Returns TRUE if the given section is contained within
6476 the given segment. VMA addresses are compared. */
6477 #define IS_CONTAINED_BY_VMA(section, segment) \
6478 (section->vma >= segment->p_vaddr \
6479 && (section->vma + SECTION_SIZE (section, segment) \
6480 <= (SEGMENT_END (segment, segment->p_vaddr))))
6482 /* Returns TRUE if the given section is contained within
6483 the given segment. LMA addresses are compared. */
6484 #define IS_CONTAINED_BY_LMA(section, segment, base) \
6485 (section->lma >= base \
6486 && (section->lma + SECTION_SIZE (section, segment) \
6487 <= SEGMENT_END (segment, base)))
6489 /* Handle PT_NOTE segment. */
6490 #define IS_NOTE(p, s) \
6491 (p->p_type == PT_NOTE \
6492 && elf_section_type (s) == SHT_NOTE \
6493 && (bfd_vma) s->filepos >= p->p_offset \
6494 && ((bfd_vma) s->filepos + s->size \
6495 <= p->p_offset + p->p_filesz))
6497 /* Special case: corefile "NOTE" section containing regs, prpsinfo
6499 #define IS_COREFILE_NOTE(p, s) \
6501 && bfd_get_format (ibfd) == bfd_core \
6505 /* The complicated case when p_vaddr is 0 is to handle the Solaris
6506 linker, which generates a PT_INTERP section with p_vaddr and
6507 p_memsz set to 0. */
6508 #define IS_SOLARIS_PT_INTERP(p, s) \
6510 && p->p_paddr == 0 \
6511 && p->p_memsz == 0 \
6512 && p->p_filesz > 0 \
6513 && (s->flags & SEC_HAS_CONTENTS) != 0 \
6515 && (bfd_vma) s->filepos >= p->p_offset \
6516 && ((bfd_vma) s->filepos + s->size \
6517 <= p->p_offset + p->p_filesz))
6519 /* Decide if the given section should be included in the given segment.
6520 A section will be included if:
6521 1. It is within the address space of the segment -- we use the LMA
6522 if that is set for the segment and the VMA otherwise,
6523 2. It is an allocated section or a NOTE section in a PT_NOTE
6525 3. There is an output section associated with it,
6526 4. The section has not already been allocated to a previous segment.
6527 5. PT_GNU_STACK segments do not include any sections.
6528 6. PT_TLS segment includes only SHF_TLS sections.
6529 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
6530 8. PT_DYNAMIC should not contain empty sections at the beginning
6531 (with the possible exception of .dynamic). */
6532 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
6533 ((((segment->p_paddr \
6534 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
6535 : IS_CONTAINED_BY_VMA (section, segment)) \
6536 && (section->flags & SEC_ALLOC) != 0) \
6537 || IS_NOTE (segment, section)) \
6538 && segment->p_type != PT_GNU_STACK \
6539 && (segment->p_type != PT_TLS \
6540 || (section->flags & SEC_THREAD_LOCAL)) \
6541 && (segment->p_type == PT_LOAD \
6542 || segment->p_type == PT_TLS \
6543 || (section->flags & SEC_THREAD_LOCAL) == 0) \
6544 && (segment->p_type != PT_DYNAMIC \
6545 || SECTION_SIZE (section, segment) > 0 \
6546 || (segment->p_paddr \
6547 ? segment->p_paddr != section->lma \
6548 : segment->p_vaddr != section->vma) \
6549 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
6551 && !section->segment_mark)
6553 /* If the output section of a section in the input segment is NULL,
6554 it is removed from the corresponding output segment. */
6555 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
6556 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
6557 && section->output_section != NULL)
6559 /* Returns TRUE iff seg1 starts after the end of seg2. */
6560 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
6561 (seg1->field >= SEGMENT_END (seg2, seg2->field))
6563 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
6564 their VMA address ranges and their LMA address ranges overlap.
6565 It is possible to have overlapping VMA ranges without overlapping LMA
6566 ranges. RedBoot images for example can have both .data and .bss mapped
6567 to the same VMA range, but with the .data section mapped to a different
6569 #define SEGMENT_OVERLAPS(seg1, seg2) \
6570 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
6571 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
6572 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
6573 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
6575 /* Initialise the segment mark field. */
6576 for (section = ibfd->sections; section != NULL; section = section->next)
6577 section->segment_mark = FALSE;
6579 /* The Solaris linker creates program headers in which all the
6580 p_paddr fields are zero. When we try to objcopy or strip such a
6581 file, we get confused. Check for this case, and if we find it
6582 don't set the p_paddr_valid fields. */
6583 p_paddr_valid = FALSE;
6584 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6587 if (segment->p_paddr != 0)
6589 p_paddr_valid = TRUE;
6593 /* Scan through the segments specified in the program header
6594 of the input BFD. For this first scan we look for overlaps
6595 in the loadable segments. These can be created by weird
6596 parameters to objcopy. Also, fix some solaris weirdness. */
6597 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6602 Elf_Internal_Phdr *segment2;
6604 if (segment->p_type == PT_INTERP)
6605 for (section = ibfd->sections; section; section = section->next)
6606 if (IS_SOLARIS_PT_INTERP (segment, section))
6608 /* Mininal change so that the normal section to segment
6609 assignment code will work. */
6610 segment->p_vaddr = section->vma;
6614 if (segment->p_type != PT_LOAD)
6616 /* Remove PT_GNU_RELRO segment. */
6617 if (segment->p_type == PT_GNU_RELRO)
6618 segment->p_type = PT_NULL;
6622 /* Determine if this segment overlaps any previous segments. */
6623 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++)
6625 bfd_signed_vma extra_length;
6627 if (segment2->p_type != PT_LOAD
6628 || !SEGMENT_OVERLAPS (segment, segment2))
6631 /* Merge the two segments together. */
6632 if (segment2->p_vaddr < segment->p_vaddr)
6634 /* Extend SEGMENT2 to include SEGMENT and then delete
6636 extra_length = (SEGMENT_END (segment, segment->p_vaddr)
6637 - SEGMENT_END (segment2, segment2->p_vaddr));
6639 if (extra_length > 0)
6641 segment2->p_memsz += extra_length;
6642 segment2->p_filesz += extra_length;
6645 segment->p_type = PT_NULL;
6647 /* Since we have deleted P we must restart the outer loop. */
6649 segment = elf_tdata (ibfd)->phdr;
6654 /* Extend SEGMENT to include SEGMENT2 and then delete
6656 extra_length = (SEGMENT_END (segment2, segment2->p_vaddr)
6657 - SEGMENT_END (segment, segment->p_vaddr));
6659 if (extra_length > 0)
6661 segment->p_memsz += extra_length;
6662 segment->p_filesz += extra_length;
6665 segment2->p_type = PT_NULL;
6670 /* The second scan attempts to assign sections to segments. */
6671 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6675 unsigned int section_count;
6676 asection **sections;
6677 asection *output_section;
6679 bfd_vma matching_lma;
6680 bfd_vma suggested_lma;
6683 asection *first_section;
6684 bfd_boolean first_matching_lma;
6685 bfd_boolean first_suggested_lma;
6687 if (segment->p_type == PT_NULL)
6690 first_section = NULL;
6691 /* Compute how many sections might be placed into this segment. */
6692 for (section = ibfd->sections, section_count = 0;
6694 section = section->next)
6696 /* Find the first section in the input segment, which may be
6697 removed from the corresponding output segment. */
6698 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
6700 if (first_section == NULL)
6701 first_section = section;
6702 if (section->output_section != NULL)
6707 /* Allocate a segment map big enough to contain
6708 all of the sections we have selected. */
6709 amt = sizeof (struct elf_segment_map);
6710 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
6711 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
6715 /* Initialise the fields of the segment map. Default to
6716 using the physical address of the segment in the input BFD. */
6718 map->p_type = segment->p_type;
6719 map->p_flags = segment->p_flags;
6720 map->p_flags_valid = 1;
6722 /* If the first section in the input segment is removed, there is
6723 no need to preserve segment physical address in the corresponding
6725 if (!first_section || first_section->output_section != NULL)
6727 map->p_paddr = segment->p_paddr;
6728 map->p_paddr_valid = p_paddr_valid;
6731 /* Determine if this segment contains the ELF file header
6732 and if it contains the program headers themselves. */
6733 map->includes_filehdr = (segment->p_offset == 0
6734 && segment->p_filesz >= iehdr->e_ehsize);
6735 map->includes_phdrs = 0;
6737 if (!phdr_included || segment->p_type != PT_LOAD)
6739 map->includes_phdrs =
6740 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
6741 && (segment->p_offset + segment->p_filesz
6742 >= ((bfd_vma) iehdr->e_phoff
6743 + iehdr->e_phnum * iehdr->e_phentsize)));
6745 if (segment->p_type == PT_LOAD && map->includes_phdrs)
6746 phdr_included = TRUE;
6749 if (section_count == 0)
6751 /* Special segments, such as the PT_PHDR segment, may contain
6752 no sections, but ordinary, loadable segments should contain
6753 something. They are allowed by the ELF spec however, so only
6754 a warning is produced.
6755 There is however the valid use case of embedded systems which
6756 have segments with p_filesz of 0 and a p_memsz > 0 to initialize
6757 flash memory with zeros. No warning is shown for that case. */
6758 if (segment->p_type == PT_LOAD
6759 && (segment->p_filesz > 0 || segment->p_memsz == 0))
6760 /* xgettext:c-format */
6761 _bfd_error_handler (_("%B: warning: Empty loadable segment detected"
6762 " at vaddr=%#Lx, is this intentional?"),
6763 ibfd, segment->p_vaddr);
6766 *pointer_to_map = map;
6767 pointer_to_map = &map->next;
6772 /* Now scan the sections in the input BFD again and attempt
6773 to add their corresponding output sections to the segment map.
6774 The problem here is how to handle an output section which has
6775 been moved (ie had its LMA changed). There are four possibilities:
6777 1. None of the sections have been moved.
6778 In this case we can continue to use the segment LMA from the
6781 2. All of the sections have been moved by the same amount.
6782 In this case we can change the segment's LMA to match the LMA
6783 of the first section.
6785 3. Some of the sections have been moved, others have not.
6786 In this case those sections which have not been moved can be
6787 placed in the current segment which will have to have its size,
6788 and possibly its LMA changed, and a new segment or segments will
6789 have to be created to contain the other sections.
6791 4. The sections have been moved, but not by the same amount.
6792 In this case we can change the segment's LMA to match the LMA
6793 of the first section and we will have to create a new segment
6794 or segments to contain the other sections.
6796 In order to save time, we allocate an array to hold the section
6797 pointers that we are interested in. As these sections get assigned
6798 to a segment, they are removed from this array. */
6800 sections = (asection **) bfd_malloc2 (section_count, sizeof (asection *));
6801 if (sections == NULL)
6804 /* Step One: Scan for segment vs section LMA conflicts.
6805 Also add the sections to the section array allocated above.
6806 Also add the sections to the current segment. In the common
6807 case, where the sections have not been moved, this means that
6808 we have completely filled the segment, and there is nothing
6813 first_matching_lma = TRUE;
6814 first_suggested_lma = TRUE;
6816 for (section = first_section, j = 0;
6818 section = section->next)
6820 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
6822 output_section = section->output_section;
6824 sections[j++] = section;
6826 /* The Solaris native linker always sets p_paddr to 0.
6827 We try to catch that case here, and set it to the
6828 correct value. Note - some backends require that
6829 p_paddr be left as zero. */
6831 && segment->p_vaddr != 0
6832 && !bed->want_p_paddr_set_to_zero
6834 && output_section->lma != 0
6835 && output_section->vma == (segment->p_vaddr
6836 + (map->includes_filehdr
6839 + (map->includes_phdrs
6841 * iehdr->e_phentsize)
6843 map->p_paddr = segment->p_vaddr;
6845 /* Match up the physical address of the segment with the
6846 LMA address of the output section. */
6847 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
6848 || IS_COREFILE_NOTE (segment, section)
6849 || (bed->want_p_paddr_set_to_zero
6850 && IS_CONTAINED_BY_VMA (output_section, segment)))
6852 if (first_matching_lma || output_section->lma < matching_lma)
6854 matching_lma = output_section->lma;
6855 first_matching_lma = FALSE;
6858 /* We assume that if the section fits within the segment
6859 then it does not overlap any other section within that
6861 map->sections[isec++] = output_section;
6863 else if (first_suggested_lma)
6865 suggested_lma = output_section->lma;
6866 first_suggested_lma = FALSE;
6869 if (j == section_count)
6874 BFD_ASSERT (j == section_count);
6876 /* Step Two: Adjust the physical address of the current segment,
6878 if (isec == section_count)
6880 /* All of the sections fitted within the segment as currently
6881 specified. This is the default case. Add the segment to
6882 the list of built segments and carry on to process the next
6883 program header in the input BFD. */
6884 map->count = section_count;
6885 *pointer_to_map = map;
6886 pointer_to_map = &map->next;
6889 && !bed->want_p_paddr_set_to_zero
6890 && matching_lma != map->p_paddr
6891 && !map->includes_filehdr
6892 && !map->includes_phdrs)
6893 /* There is some padding before the first section in the
6894 segment. So, we must account for that in the output
6896 map->p_vaddr_offset = matching_lma - map->p_paddr;
6903 if (!first_matching_lma)
6905 /* At least one section fits inside the current segment.
6906 Keep it, but modify its physical address to match the
6907 LMA of the first section that fitted. */
6908 map->p_paddr = matching_lma;
6912 /* None of the sections fitted inside the current segment.
6913 Change the current segment's physical address to match
6914 the LMA of the first section. */
6915 map->p_paddr = suggested_lma;
6918 /* Offset the segment physical address from the lma
6919 to allow for space taken up by elf headers. */
6920 if (map->includes_filehdr)
6922 if (map->p_paddr >= iehdr->e_ehsize)
6923 map->p_paddr -= iehdr->e_ehsize;
6926 map->includes_filehdr = FALSE;
6927 map->includes_phdrs = FALSE;
6931 if (map->includes_phdrs)
6933 if (map->p_paddr >= iehdr->e_phnum * iehdr->e_phentsize)
6935 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
6937 /* iehdr->e_phnum is just an estimate of the number
6938 of program headers that we will need. Make a note
6939 here of the number we used and the segment we chose
6940 to hold these headers, so that we can adjust the
6941 offset when we know the correct value. */
6942 phdr_adjust_num = iehdr->e_phnum;
6943 phdr_adjust_seg = map;
6946 map->includes_phdrs = FALSE;
6950 /* Step Three: Loop over the sections again, this time assigning
6951 those that fit to the current segment and removing them from the
6952 sections array; but making sure not to leave large gaps. Once all
6953 possible sections have been assigned to the current segment it is
6954 added to the list of built segments and if sections still remain
6955 to be assigned, a new segment is constructed before repeating
6962 first_suggested_lma = TRUE;
6964 /* Fill the current segment with sections that fit. */
6965 for (j = 0; j < section_count; j++)
6967 section = sections[j];
6969 if (section == NULL)
6972 output_section = section->output_section;
6974 BFD_ASSERT (output_section != NULL);
6976 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
6977 || IS_COREFILE_NOTE (segment, section))
6979 if (map->count == 0)
6981 /* If the first section in a segment does not start at
6982 the beginning of the segment, then something is
6984 if (output_section->lma
6986 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
6987 + (map->includes_phdrs
6988 ? iehdr->e_phnum * iehdr->e_phentsize
6996 prev_sec = map->sections[map->count - 1];
6998 /* If the gap between the end of the previous section
6999 and the start of this section is more than
7000 maxpagesize then we need to start a new segment. */
7001 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
7003 < BFD_ALIGN (output_section->lma, maxpagesize))
7004 || (prev_sec->lma + prev_sec->size
7005 > output_section->lma))
7007 if (first_suggested_lma)
7009 suggested_lma = output_section->lma;
7010 first_suggested_lma = FALSE;
7017 map->sections[map->count++] = output_section;
7020 section->segment_mark = TRUE;
7022 else if (first_suggested_lma)
7024 suggested_lma = output_section->lma;
7025 first_suggested_lma = FALSE;
7029 BFD_ASSERT (map->count > 0);
7031 /* Add the current segment to the list of built segments. */
7032 *pointer_to_map = map;
7033 pointer_to_map = &map->next;
7035 if (isec < section_count)
7037 /* We still have not allocated all of the sections to
7038 segments. Create a new segment here, initialise it
7039 and carry on looping. */
7040 amt = sizeof (struct elf_segment_map);
7041 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
7042 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
7049 /* Initialise the fields of the segment map. Set the physical
7050 physical address to the LMA of the first section that has
7051 not yet been assigned. */
7053 map->p_type = segment->p_type;
7054 map->p_flags = segment->p_flags;
7055 map->p_flags_valid = 1;
7056 map->p_paddr = suggested_lma;
7057 map->p_paddr_valid = p_paddr_valid;
7058 map->includes_filehdr = 0;
7059 map->includes_phdrs = 0;
7062 while (isec < section_count);
7067 elf_seg_map (obfd) = map_first;
7069 /* If we had to estimate the number of program headers that were
7070 going to be needed, then check our estimate now and adjust
7071 the offset if necessary. */
7072 if (phdr_adjust_seg != NULL)
7076 for (count = 0, map = map_first; map != NULL; map = map->next)
7079 if (count > phdr_adjust_num)
7080 phdr_adjust_seg->p_paddr
7081 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
7086 #undef IS_CONTAINED_BY_VMA
7087 #undef IS_CONTAINED_BY_LMA
7089 #undef IS_COREFILE_NOTE
7090 #undef IS_SOLARIS_PT_INTERP
7091 #undef IS_SECTION_IN_INPUT_SEGMENT
7092 #undef INCLUDE_SECTION_IN_SEGMENT
7093 #undef SEGMENT_AFTER_SEGMENT
7094 #undef SEGMENT_OVERLAPS
7098 /* Copy ELF program header information. */
7101 copy_elf_program_header (bfd *ibfd, bfd *obfd)
7103 Elf_Internal_Ehdr *iehdr;
7104 struct elf_segment_map *map;
7105 struct elf_segment_map *map_first;
7106 struct elf_segment_map **pointer_to_map;
7107 Elf_Internal_Phdr *segment;
7109 unsigned int num_segments;
7110 bfd_boolean phdr_included = FALSE;
7111 bfd_boolean p_paddr_valid;
7113 iehdr = elf_elfheader (ibfd);
7116 pointer_to_map = &map_first;
7118 /* If all the segment p_paddr fields are zero, don't set
7119 map->p_paddr_valid. */
7120 p_paddr_valid = FALSE;
7121 num_segments = elf_elfheader (ibfd)->e_phnum;
7122 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7125 if (segment->p_paddr != 0)
7127 p_paddr_valid = TRUE;
7131 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7136 unsigned int section_count;
7138 Elf_Internal_Shdr *this_hdr;
7139 asection *first_section = NULL;
7140 asection *lowest_section;
7142 /* Compute how many sections are in this segment. */
7143 for (section = ibfd->sections, section_count = 0;
7145 section = section->next)
7147 this_hdr = &(elf_section_data(section)->this_hdr);
7148 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7150 if (first_section == NULL)
7151 first_section = section;
7156 /* Allocate a segment map big enough to contain
7157 all of the sections we have selected. */
7158 amt = sizeof (struct elf_segment_map);
7159 if (section_count != 0)
7160 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
7161 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
7165 /* Initialize the fields of the output segment map with the
7168 map->p_type = segment->p_type;
7169 map->p_flags = segment->p_flags;
7170 map->p_flags_valid = 1;
7171 map->p_paddr = segment->p_paddr;
7172 map->p_paddr_valid = p_paddr_valid;
7173 map->p_align = segment->p_align;
7174 map->p_align_valid = 1;
7175 map->p_vaddr_offset = 0;
7177 if (map->p_type == PT_GNU_RELRO
7178 || map->p_type == PT_GNU_STACK)
7180 /* The PT_GNU_RELRO segment may contain the first a few
7181 bytes in the .got.plt section even if the whole .got.plt
7182 section isn't in the PT_GNU_RELRO segment. We won't
7183 change the size of the PT_GNU_RELRO segment.
7184 Similarly, PT_GNU_STACK size is significant on uclinux
7186 map->p_size = segment->p_memsz;
7187 map->p_size_valid = 1;
7190 /* Determine if this segment contains the ELF file header
7191 and if it contains the program headers themselves. */
7192 map->includes_filehdr = (segment->p_offset == 0
7193 && segment->p_filesz >= iehdr->e_ehsize);
7195 map->includes_phdrs = 0;
7196 if (! phdr_included || segment->p_type != PT_LOAD)
7198 map->includes_phdrs =
7199 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
7200 && (segment->p_offset + segment->p_filesz
7201 >= ((bfd_vma) iehdr->e_phoff
7202 + iehdr->e_phnum * iehdr->e_phentsize)));
7204 if (segment->p_type == PT_LOAD && map->includes_phdrs)
7205 phdr_included = TRUE;
7208 lowest_section = NULL;
7209 if (section_count != 0)
7211 unsigned int isec = 0;
7213 for (section = first_section;
7215 section = section->next)
7217 this_hdr = &(elf_section_data(section)->this_hdr);
7218 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7220 map->sections[isec++] = section->output_section;
7221 if ((section->flags & SEC_ALLOC) != 0)
7225 if (lowest_section == NULL
7226 || section->lma < lowest_section->lma)
7227 lowest_section = section;
7229 /* Section lmas are set up from PT_LOAD header
7230 p_paddr in _bfd_elf_make_section_from_shdr.
7231 If this header has a p_paddr that disagrees
7232 with the section lma, flag the p_paddr as
7234 if ((section->flags & SEC_LOAD) != 0)
7235 seg_off = this_hdr->sh_offset - segment->p_offset;
7237 seg_off = this_hdr->sh_addr - segment->p_vaddr;
7238 if (section->lma - segment->p_paddr != seg_off)
7239 map->p_paddr_valid = FALSE;
7241 if (isec == section_count)
7247 if (map->includes_filehdr && lowest_section != NULL)
7248 /* We need to keep the space used by the headers fixed. */
7249 map->header_size = lowest_section->vma - segment->p_vaddr;
7251 if (!map->includes_phdrs
7252 && !map->includes_filehdr
7253 && map->p_paddr_valid)
7254 /* There is some other padding before the first section. */
7255 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
7256 - segment->p_paddr);
7258 map->count = section_count;
7259 *pointer_to_map = map;
7260 pointer_to_map = &map->next;
7263 elf_seg_map (obfd) = map_first;
7267 /* Copy private BFD data. This copies or rewrites ELF program header
7271 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
7273 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7274 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7277 if (elf_tdata (ibfd)->phdr == NULL)
7280 if (ibfd->xvec == obfd->xvec)
7282 /* Check to see if any sections in the input BFD
7283 covered by ELF program header have changed. */
7284 Elf_Internal_Phdr *segment;
7285 asection *section, *osec;
7286 unsigned int i, num_segments;
7287 Elf_Internal_Shdr *this_hdr;
7288 const struct elf_backend_data *bed;
7290 bed = get_elf_backend_data (ibfd);
7292 /* Regenerate the segment map if p_paddr is set to 0. */
7293 if (bed->want_p_paddr_set_to_zero)
7296 /* Initialize the segment mark field. */
7297 for (section = obfd->sections; section != NULL;
7298 section = section->next)
7299 section->segment_mark = FALSE;
7301 num_segments = elf_elfheader (ibfd)->e_phnum;
7302 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7306 /* PR binutils/3535. The Solaris linker always sets the p_paddr
7307 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
7308 which severly confuses things, so always regenerate the segment
7309 map in this case. */
7310 if (segment->p_paddr == 0
7311 && segment->p_memsz == 0
7312 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
7315 for (section = ibfd->sections;
7316 section != NULL; section = section->next)
7318 /* We mark the output section so that we know it comes
7319 from the input BFD. */
7320 osec = section->output_section;
7322 osec->segment_mark = TRUE;
7324 /* Check if this section is covered by the segment. */
7325 this_hdr = &(elf_section_data(section)->this_hdr);
7326 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
7328 /* FIXME: Check if its output section is changed or
7329 removed. What else do we need to check? */
7331 || section->flags != osec->flags
7332 || section->lma != osec->lma
7333 || section->vma != osec->vma
7334 || section->size != osec->size
7335 || section->rawsize != osec->rawsize
7336 || section->alignment_power != osec->alignment_power)
7342 /* Check to see if any output section do not come from the
7344 for (section = obfd->sections; section != NULL;
7345 section = section->next)
7347 if (!section->segment_mark)
7350 section->segment_mark = FALSE;
7353 return copy_elf_program_header (ibfd, obfd);
7357 if (ibfd->xvec == obfd->xvec)
7359 /* When rewriting program header, set the output maxpagesize to
7360 the maximum alignment of input PT_LOAD segments. */
7361 Elf_Internal_Phdr *segment;
7363 unsigned int num_segments = elf_elfheader (ibfd)->e_phnum;
7364 bfd_vma maxpagesize = 0;
7366 for (i = 0, segment = elf_tdata (ibfd)->phdr;
7369 if (segment->p_type == PT_LOAD
7370 && maxpagesize < segment->p_align)
7372 /* PR 17512: file: f17299af. */
7373 if (segment->p_align > (bfd_vma) 1 << ((sizeof (bfd_vma) * 8) - 2))
7374 /* xgettext:c-format */
7375 _bfd_error_handler (_("%B: warning: segment alignment of %#Lx"
7377 ibfd, segment->p_align);
7379 maxpagesize = segment->p_align;
7382 if (maxpagesize != get_elf_backend_data (obfd)->maxpagesize)
7383 bfd_emul_set_maxpagesize (bfd_get_target (obfd), maxpagesize);
7386 return rewrite_elf_program_header (ibfd, obfd);
7389 /* Initialize private output section information from input section. */
7392 _bfd_elf_init_private_section_data (bfd *ibfd,
7396 struct bfd_link_info *link_info)
7399 Elf_Internal_Shdr *ihdr, *ohdr;
7400 bfd_boolean final_link = (link_info != NULL
7401 && !bfd_link_relocatable (link_info));
7403 if (ibfd->xvec->flavour != bfd_target_elf_flavour
7404 || obfd->xvec->flavour != bfd_target_elf_flavour)
7407 BFD_ASSERT (elf_section_data (osec) != NULL);
7409 /* For objcopy and relocatable link, don't copy the output ELF
7410 section type from input if the output BFD section flags have been
7411 set to something different. For a final link allow some flags
7412 that the linker clears to differ. */
7413 if (elf_section_type (osec) == SHT_NULL
7414 && (osec->flags == isec->flags
7416 && ((osec->flags ^ isec->flags)
7417 & ~(SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_RELOC)) == 0)))
7418 elf_section_type (osec) = elf_section_type (isec);
7420 /* FIXME: Is this correct for all OS/PROC specific flags? */
7421 elf_section_flags (osec) |= (elf_section_flags (isec)
7422 & (SHF_MASKOS | SHF_MASKPROC));
7424 /* Copy sh_info from input for mbind section. */
7425 if (elf_section_flags (isec) & SHF_GNU_MBIND)
7426 elf_section_data (osec)->this_hdr.sh_info
7427 = elf_section_data (isec)->this_hdr.sh_info;
7429 /* Set things up for objcopy and relocatable link. The output
7430 SHT_GROUP section will have its elf_next_in_group pointing back
7431 to the input group members. Ignore linker created group section.
7432 See elfNN_ia64_object_p in elfxx-ia64.c. */
7433 if ((link_info == NULL
7434 || !link_info->resolve_section_groups)
7435 && (elf_sec_group (isec) == NULL
7436 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0))
7438 if (elf_section_flags (isec) & SHF_GROUP)
7439 elf_section_flags (osec) |= SHF_GROUP;
7440 elf_next_in_group (osec) = elf_next_in_group (isec);
7441 elf_section_data (osec)->group = elf_section_data (isec)->group;
7444 /* If not decompress, preserve SHF_COMPRESSED. */
7445 if (!final_link && (ibfd->flags & BFD_DECOMPRESS) == 0)
7446 elf_section_flags (osec) |= (elf_section_flags (isec)
7449 ihdr = &elf_section_data (isec)->this_hdr;
7451 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
7452 don't use the output section of the linked-to section since it
7453 may be NULL at this point. */
7454 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
7456 ohdr = &elf_section_data (osec)->this_hdr;
7457 ohdr->sh_flags |= SHF_LINK_ORDER;
7458 elf_linked_to_section (osec) = elf_linked_to_section (isec);
7461 osec->use_rela_p = isec->use_rela_p;
7466 /* Copy private section information. This copies over the entsize
7467 field, and sometimes the info field. */
7470 _bfd_elf_copy_private_section_data (bfd *ibfd,
7475 Elf_Internal_Shdr *ihdr, *ohdr;
7477 if (ibfd->xvec->flavour != bfd_target_elf_flavour
7478 || obfd->xvec->flavour != bfd_target_elf_flavour)
7481 ihdr = &elf_section_data (isec)->this_hdr;
7482 ohdr = &elf_section_data (osec)->this_hdr;
7484 ohdr->sh_entsize = ihdr->sh_entsize;
7486 if (ihdr->sh_type == SHT_SYMTAB
7487 || ihdr->sh_type == SHT_DYNSYM
7488 || ihdr->sh_type == SHT_GNU_verneed
7489 || ihdr->sh_type == SHT_GNU_verdef)
7490 ohdr->sh_info = ihdr->sh_info;
7492 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
7496 /* Look at all the SHT_GROUP sections in IBFD, making any adjustments
7497 necessary if we are removing either the SHT_GROUP section or any of
7498 the group member sections. DISCARDED is the value that a section's
7499 output_section has if the section will be discarded, NULL when this
7500 function is called from objcopy, bfd_abs_section_ptr when called
7504 _bfd_elf_fixup_group_sections (bfd *ibfd, asection *discarded)
7508 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
7509 if (elf_section_type (isec) == SHT_GROUP)
7511 asection *first = elf_next_in_group (isec);
7512 asection *s = first;
7513 bfd_size_type removed = 0;
7517 /* If this member section is being output but the
7518 SHT_GROUP section is not, then clear the group info
7519 set up by _bfd_elf_copy_private_section_data. */
7520 if (s->output_section != discarded
7521 && isec->output_section == discarded)
7523 elf_section_flags (s->output_section) &= ~SHF_GROUP;
7524 elf_group_name (s->output_section) = NULL;
7526 /* Conversely, if the member section is not being output
7527 but the SHT_GROUP section is, then adjust its size. */
7528 else if (s->output_section == discarded
7529 && isec->output_section != discarded)
7531 s = elf_next_in_group (s);
7537 if (discarded != NULL)
7539 /* If we've been called for ld -r, then we need to
7540 adjust the input section size. This function may
7541 be called multiple times, so save the original
7543 if (isec->rawsize == 0)
7544 isec->rawsize = isec->size;
7545 isec->size = isec->rawsize - removed;
7549 /* Adjust the output section size when called from
7551 isec->output_section->size -= removed;
7559 /* Copy private header information. */
7562 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
7564 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7565 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7568 /* Copy over private BFD data if it has not already been copied.
7569 This must be done here, rather than in the copy_private_bfd_data
7570 entry point, because the latter is called after the section
7571 contents have been set, which means that the program headers have
7572 already been worked out. */
7573 if (elf_seg_map (obfd) == NULL && elf_tdata (ibfd)->phdr != NULL)
7575 if (! copy_private_bfd_data (ibfd, obfd))
7579 return _bfd_elf_fixup_group_sections (ibfd, NULL);
7582 /* Copy private symbol information. If this symbol is in a section
7583 which we did not map into a BFD section, try to map the section
7584 index correctly. We use special macro definitions for the mapped
7585 section indices; these definitions are interpreted by the
7586 swap_out_syms function. */
7588 #define MAP_ONESYMTAB (SHN_HIOS + 1)
7589 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
7590 #define MAP_STRTAB (SHN_HIOS + 3)
7591 #define MAP_SHSTRTAB (SHN_HIOS + 4)
7592 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
7595 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
7600 elf_symbol_type *isym, *osym;
7602 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7603 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7606 isym = elf_symbol_from (ibfd, isymarg);
7607 osym = elf_symbol_from (obfd, osymarg);
7610 && isym->internal_elf_sym.st_shndx != 0
7612 && bfd_is_abs_section (isym->symbol.section))
7616 shndx = isym->internal_elf_sym.st_shndx;
7617 if (shndx == elf_onesymtab (ibfd))
7618 shndx = MAP_ONESYMTAB;
7619 else if (shndx == elf_dynsymtab (ibfd))
7620 shndx = MAP_DYNSYMTAB;
7621 else if (shndx == elf_strtab_sec (ibfd))
7623 else if (shndx == elf_shstrtab_sec (ibfd))
7624 shndx = MAP_SHSTRTAB;
7625 else if (find_section_in_list (shndx, elf_symtab_shndx_list (ibfd)))
7626 shndx = MAP_SYM_SHNDX;
7627 osym->internal_elf_sym.st_shndx = shndx;
7633 /* Swap out the symbols. */
7636 swap_out_syms (bfd *abfd,
7637 struct elf_strtab_hash **sttp,
7640 const struct elf_backend_data *bed;
7643 struct elf_strtab_hash *stt;
7644 Elf_Internal_Shdr *symtab_hdr;
7645 Elf_Internal_Shdr *symtab_shndx_hdr;
7646 Elf_Internal_Shdr *symstrtab_hdr;
7647 struct elf_sym_strtab *symstrtab;
7648 bfd_byte *outbound_syms;
7649 bfd_byte *outbound_shndx;
7650 unsigned long outbound_syms_index;
7651 unsigned long outbound_shndx_index;
7653 unsigned int num_locals;
7655 bfd_boolean name_local_sections;
7657 if (!elf_map_symbols (abfd, &num_locals))
7660 /* Dump out the symtabs. */
7661 stt = _bfd_elf_strtab_init ();
7665 bed = get_elf_backend_data (abfd);
7666 symcount = bfd_get_symcount (abfd);
7667 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7668 symtab_hdr->sh_type = SHT_SYMTAB;
7669 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
7670 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
7671 symtab_hdr->sh_info = num_locals + 1;
7672 symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
7674 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
7675 symstrtab_hdr->sh_type = SHT_STRTAB;
7677 /* Allocate buffer to swap out the .strtab section. */
7678 symstrtab = (struct elf_sym_strtab *) bfd_malloc ((symcount + 1)
7679 * sizeof (*symstrtab));
7680 if (symstrtab == NULL)
7682 _bfd_elf_strtab_free (stt);
7686 outbound_syms = (bfd_byte *) bfd_alloc2 (abfd, 1 + symcount,
7687 bed->s->sizeof_sym);
7688 if (outbound_syms == NULL)
7691 _bfd_elf_strtab_free (stt);
7695 symtab_hdr->contents = outbound_syms;
7696 outbound_syms_index = 0;
7698 outbound_shndx = NULL;
7699 outbound_shndx_index = 0;
7701 if (elf_symtab_shndx_list (abfd))
7703 symtab_shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr;
7704 if (symtab_shndx_hdr->sh_name != 0)
7706 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
7707 outbound_shndx = (bfd_byte *)
7708 bfd_zalloc2 (abfd, 1 + symcount, sizeof (Elf_External_Sym_Shndx));
7709 if (outbound_shndx == NULL)
7712 symtab_shndx_hdr->contents = outbound_shndx;
7713 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
7714 symtab_shndx_hdr->sh_size = amt;
7715 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
7716 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
7718 /* FIXME: What about any other headers in the list ? */
7721 /* Now generate the data (for "contents"). */
7723 /* Fill in zeroth symbol and swap it out. */
7724 Elf_Internal_Sym sym;
7730 sym.st_shndx = SHN_UNDEF;
7731 sym.st_target_internal = 0;
7732 symstrtab[0].sym = sym;
7733 symstrtab[0].dest_index = outbound_syms_index;
7734 symstrtab[0].destshndx_index = outbound_shndx_index;
7735 outbound_syms_index++;
7736 if (outbound_shndx != NULL)
7737 outbound_shndx_index++;
7741 = (bed->elf_backend_name_local_section_symbols
7742 && bed->elf_backend_name_local_section_symbols (abfd));
7744 syms = bfd_get_outsymbols (abfd);
7745 for (idx = 0; idx < symcount;)
7747 Elf_Internal_Sym sym;
7748 bfd_vma value = syms[idx]->value;
7749 elf_symbol_type *type_ptr;
7750 flagword flags = syms[idx]->flags;
7753 if (!name_local_sections
7754 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
7756 /* Local section symbols have no name. */
7757 sym.st_name = (unsigned long) -1;
7761 /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize
7762 to get the final offset for st_name. */
7764 = (unsigned long) _bfd_elf_strtab_add (stt, syms[idx]->name,
7766 if (sym.st_name == (unsigned long) -1)
7770 type_ptr = elf_symbol_from (abfd, syms[idx]);
7772 if ((flags & BSF_SECTION_SYM) == 0
7773 && bfd_is_com_section (syms[idx]->section))
7775 /* ELF common symbols put the alignment into the `value' field,
7776 and the size into the `size' field. This is backwards from
7777 how BFD handles it, so reverse it here. */
7778 sym.st_size = value;
7779 if (type_ptr == NULL
7780 || type_ptr->internal_elf_sym.st_value == 0)
7781 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
7783 sym.st_value = type_ptr->internal_elf_sym.st_value;
7784 sym.st_shndx = _bfd_elf_section_from_bfd_section
7785 (abfd, syms[idx]->section);
7789 asection *sec = syms[idx]->section;
7792 if (sec->output_section)
7794 value += sec->output_offset;
7795 sec = sec->output_section;
7798 /* Don't add in the section vma for relocatable output. */
7799 if (! relocatable_p)
7801 sym.st_value = value;
7802 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
7804 if (bfd_is_abs_section (sec)
7806 && type_ptr->internal_elf_sym.st_shndx != 0)
7808 /* This symbol is in a real ELF section which we did
7809 not create as a BFD section. Undo the mapping done
7810 by copy_private_symbol_data. */
7811 shndx = type_ptr->internal_elf_sym.st_shndx;
7815 shndx = elf_onesymtab (abfd);
7818 shndx = elf_dynsymtab (abfd);
7821 shndx = elf_strtab_sec (abfd);
7824 shndx = elf_shstrtab_sec (abfd);
7827 if (elf_symtab_shndx_list (abfd))
7828 shndx = elf_symtab_shndx_list (abfd)->ndx;
7837 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
7839 if (shndx == SHN_BAD)
7843 /* Writing this would be a hell of a lot easier if
7844 we had some decent documentation on bfd, and
7845 knew what to expect of the library, and what to
7846 demand of applications. For example, it
7847 appears that `objcopy' might not set the
7848 section of a symbol to be a section that is
7849 actually in the output file. */
7850 sec2 = bfd_get_section_by_name (abfd, sec->name);
7852 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
7853 if (shndx == SHN_BAD)
7855 /* xgettext:c-format */
7856 _bfd_error_handler (_("\
7857 Unable to find equivalent output section for symbol '%s' from section '%s'"),
7858 syms[idx]->name ? syms[idx]->name : "<Local sym>",
7860 bfd_set_error (bfd_error_invalid_operation);
7866 sym.st_shndx = shndx;
7869 if ((flags & BSF_THREAD_LOCAL) != 0)
7871 else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0)
7872 type = STT_GNU_IFUNC;
7873 else if ((flags & BSF_FUNCTION) != 0)
7875 else if ((flags & BSF_OBJECT) != 0)
7877 else if ((flags & BSF_RELC) != 0)
7879 else if ((flags & BSF_SRELC) != 0)
7884 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
7887 /* Processor-specific types. */
7888 if (type_ptr != NULL
7889 && bed->elf_backend_get_symbol_type)
7890 type = ((*bed->elf_backend_get_symbol_type)
7891 (&type_ptr->internal_elf_sym, type));
7893 if (flags & BSF_SECTION_SYM)
7895 if (flags & BSF_GLOBAL)
7896 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
7898 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
7900 else if (bfd_is_com_section (syms[idx]->section))
7902 if (type != STT_TLS)
7904 if ((abfd->flags & BFD_CONVERT_ELF_COMMON))
7905 type = ((abfd->flags & BFD_USE_ELF_STT_COMMON)
7906 ? STT_COMMON : STT_OBJECT);
7908 type = ((flags & BSF_ELF_COMMON) != 0
7909 ? STT_COMMON : STT_OBJECT);
7911 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
7913 else if (bfd_is_und_section (syms[idx]->section))
7914 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
7918 else if (flags & BSF_FILE)
7919 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
7922 int bind = STB_LOCAL;
7924 if (flags & BSF_LOCAL)
7926 else if (flags & BSF_GNU_UNIQUE)
7927 bind = STB_GNU_UNIQUE;
7928 else if (flags & BSF_WEAK)
7930 else if (flags & BSF_GLOBAL)
7933 sym.st_info = ELF_ST_INFO (bind, type);
7936 if (type_ptr != NULL)
7938 sym.st_other = type_ptr->internal_elf_sym.st_other;
7939 sym.st_target_internal
7940 = type_ptr->internal_elf_sym.st_target_internal;
7945 sym.st_target_internal = 0;
7949 symstrtab[idx].sym = sym;
7950 symstrtab[idx].dest_index = outbound_syms_index;
7951 symstrtab[idx].destshndx_index = outbound_shndx_index;
7953 outbound_syms_index++;
7954 if (outbound_shndx != NULL)
7955 outbound_shndx_index++;
7958 /* Finalize the .strtab section. */
7959 _bfd_elf_strtab_finalize (stt);
7961 /* Swap out the .strtab section. */
7962 for (idx = 0; idx <= symcount; idx++)
7964 struct elf_sym_strtab *elfsym = &symstrtab[idx];
7965 if (elfsym->sym.st_name == (unsigned long) -1)
7966 elfsym->sym.st_name = 0;
7968 elfsym->sym.st_name = _bfd_elf_strtab_offset (stt,
7969 elfsym->sym.st_name);
7970 bed->s->swap_symbol_out (abfd, &elfsym->sym,
7972 + (elfsym->dest_index
7973 * bed->s->sizeof_sym)),
7975 + (elfsym->destshndx_index
7976 * sizeof (Elf_External_Sym_Shndx))));
7981 symstrtab_hdr->sh_size = _bfd_elf_strtab_size (stt);
7982 symstrtab_hdr->sh_type = SHT_STRTAB;
7983 symstrtab_hdr->sh_flags = bed->elf_strtab_flags;
7984 symstrtab_hdr->sh_addr = 0;
7985 symstrtab_hdr->sh_entsize = 0;
7986 symstrtab_hdr->sh_link = 0;
7987 symstrtab_hdr->sh_info = 0;
7988 symstrtab_hdr->sh_addralign = 1;
7993 /* Return the number of bytes required to hold the symtab vector.
7995 Note that we base it on the count plus 1, since we will null terminate
7996 the vector allocated based on this size. However, the ELF symbol table
7997 always has a dummy entry as symbol #0, so it ends up even. */
8000 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
8004 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
8006 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
8007 symtab_size = (symcount + 1) * (sizeof (asymbol *));
8009 symtab_size -= sizeof (asymbol *);
8015 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
8019 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
8021 if (elf_dynsymtab (abfd) == 0)
8023 bfd_set_error (bfd_error_invalid_operation);
8027 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
8028 symtab_size = (symcount + 1) * (sizeof (asymbol *));
8030 symtab_size -= sizeof (asymbol *);
8036 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
8039 return (asect->reloc_count + 1) * sizeof (arelent *);
8042 /* Canonicalize the relocs. */
8045 _bfd_elf_canonicalize_reloc (bfd *abfd,
8052 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8054 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
8057 tblptr = section->relocation;
8058 for (i = 0; i < section->reloc_count; i++)
8059 *relptr++ = tblptr++;
8063 return section->reloc_count;
8067 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
8069 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8070 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
8073 bfd_get_symcount (abfd) = symcount;
8078 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
8079 asymbol **allocation)
8081 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8082 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
8085 bfd_get_dynamic_symcount (abfd) = symcount;
8089 /* Return the size required for the dynamic reloc entries. Any loadable
8090 section that was actually installed in the BFD, and has type SHT_REL
8091 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
8092 dynamic reloc section. */
8095 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
8100 if (elf_dynsymtab (abfd) == 0)
8102 bfd_set_error (bfd_error_invalid_operation);
8106 ret = sizeof (arelent *);
8107 for (s = abfd->sections; s != NULL; s = s->next)
8108 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
8109 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
8110 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
8111 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
8112 * sizeof (arelent *));
8117 /* Canonicalize the dynamic relocation entries. Note that we return the
8118 dynamic relocations as a single block, although they are actually
8119 associated with particular sections; the interface, which was
8120 designed for SunOS style shared libraries, expects that there is only
8121 one set of dynamic relocs. Any loadable section that was actually
8122 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
8123 dynamic symbol table, is considered to be a dynamic reloc section. */
8126 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
8130 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8134 if (elf_dynsymtab (abfd) == 0)
8136 bfd_set_error (bfd_error_invalid_operation);
8140 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8142 for (s = abfd->sections; s != NULL; s = s->next)
8144 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
8145 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
8146 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
8151 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
8153 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
8155 for (i = 0; i < count; i++)
8166 /* Read in the version information. */
8169 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
8171 bfd_byte *contents = NULL;
8172 unsigned int freeidx = 0;
8174 if (elf_dynverref (abfd) != 0)
8176 Elf_Internal_Shdr *hdr;
8177 Elf_External_Verneed *everneed;
8178 Elf_Internal_Verneed *iverneed;
8180 bfd_byte *contents_end;
8182 hdr = &elf_tdata (abfd)->dynverref_hdr;
8184 if (hdr->sh_info == 0 || hdr->sh_size < sizeof (Elf_External_Verneed))
8186 error_return_bad_verref:
8188 (_("%B: .gnu.version_r invalid entry"), abfd);
8189 bfd_set_error (bfd_error_bad_value);
8190 error_return_verref:
8191 elf_tdata (abfd)->verref = NULL;
8192 elf_tdata (abfd)->cverrefs = 0;
8196 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
8197 if (contents == NULL)
8198 goto error_return_verref;
8200 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
8201 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
8202 goto error_return_verref;
8204 elf_tdata (abfd)->verref = (Elf_Internal_Verneed *)
8205 bfd_zalloc2 (abfd, hdr->sh_info, sizeof (Elf_Internal_Verneed));
8207 if (elf_tdata (abfd)->verref == NULL)
8208 goto error_return_verref;
8210 BFD_ASSERT (sizeof (Elf_External_Verneed)
8211 == sizeof (Elf_External_Vernaux));
8212 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
8213 everneed = (Elf_External_Verneed *) contents;
8214 iverneed = elf_tdata (abfd)->verref;
8215 for (i = 0; i < hdr->sh_info; i++, iverneed++)
8217 Elf_External_Vernaux *evernaux;
8218 Elf_Internal_Vernaux *ivernaux;
8221 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
8223 iverneed->vn_bfd = abfd;
8225 iverneed->vn_filename =
8226 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8228 if (iverneed->vn_filename == NULL)
8229 goto error_return_bad_verref;
8231 if (iverneed->vn_cnt == 0)
8232 iverneed->vn_auxptr = NULL;
8235 iverneed->vn_auxptr = (struct elf_internal_vernaux *)
8236 bfd_alloc2 (abfd, iverneed->vn_cnt,
8237 sizeof (Elf_Internal_Vernaux));
8238 if (iverneed->vn_auxptr == NULL)
8239 goto error_return_verref;
8242 if (iverneed->vn_aux
8243 > (size_t) (contents_end - (bfd_byte *) everneed))
8244 goto error_return_bad_verref;
8246 evernaux = ((Elf_External_Vernaux *)
8247 ((bfd_byte *) everneed + iverneed->vn_aux));
8248 ivernaux = iverneed->vn_auxptr;
8249 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
8251 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
8253 ivernaux->vna_nodename =
8254 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8255 ivernaux->vna_name);
8256 if (ivernaux->vna_nodename == NULL)
8257 goto error_return_bad_verref;
8259 if (ivernaux->vna_other > freeidx)
8260 freeidx = ivernaux->vna_other;
8262 ivernaux->vna_nextptr = NULL;
8263 if (ivernaux->vna_next == 0)
8265 iverneed->vn_cnt = j + 1;
8268 if (j + 1 < iverneed->vn_cnt)
8269 ivernaux->vna_nextptr = ivernaux + 1;
8271 if (ivernaux->vna_next
8272 > (size_t) (contents_end - (bfd_byte *) evernaux))
8273 goto error_return_bad_verref;
8275 evernaux = ((Elf_External_Vernaux *)
8276 ((bfd_byte *) evernaux + ivernaux->vna_next));
8279 iverneed->vn_nextref = NULL;
8280 if (iverneed->vn_next == 0)
8282 if (i + 1 < hdr->sh_info)
8283 iverneed->vn_nextref = iverneed + 1;
8285 if (iverneed->vn_next
8286 > (size_t) (contents_end - (bfd_byte *) everneed))
8287 goto error_return_bad_verref;
8289 everneed = ((Elf_External_Verneed *)
8290 ((bfd_byte *) everneed + iverneed->vn_next));
8292 elf_tdata (abfd)->cverrefs = i;
8298 if (elf_dynverdef (abfd) != 0)
8300 Elf_Internal_Shdr *hdr;
8301 Elf_External_Verdef *everdef;
8302 Elf_Internal_Verdef *iverdef;
8303 Elf_Internal_Verdef *iverdefarr;
8304 Elf_Internal_Verdef iverdefmem;
8306 unsigned int maxidx;
8307 bfd_byte *contents_end_def, *contents_end_aux;
8309 hdr = &elf_tdata (abfd)->dynverdef_hdr;
8311 if (hdr->sh_info == 0 || hdr->sh_size < sizeof (Elf_External_Verdef))
8313 error_return_bad_verdef:
8315 (_("%B: .gnu.version_d invalid entry"), abfd);
8316 bfd_set_error (bfd_error_bad_value);
8317 error_return_verdef:
8318 elf_tdata (abfd)->verdef = NULL;
8319 elf_tdata (abfd)->cverdefs = 0;
8323 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
8324 if (contents == NULL)
8325 goto error_return_verdef;
8326 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
8327 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
8328 goto error_return_verdef;
8330 BFD_ASSERT (sizeof (Elf_External_Verdef)
8331 >= sizeof (Elf_External_Verdaux));
8332 contents_end_def = contents + hdr->sh_size
8333 - sizeof (Elf_External_Verdef);
8334 contents_end_aux = contents + hdr->sh_size
8335 - sizeof (Elf_External_Verdaux);
8337 /* We know the number of entries in the section but not the maximum
8338 index. Therefore we have to run through all entries and find
8340 everdef = (Elf_External_Verdef *) contents;
8342 for (i = 0; i < hdr->sh_info; ++i)
8344 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
8346 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) == 0)
8347 goto error_return_bad_verdef;
8348 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
8349 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
8351 if (iverdefmem.vd_next == 0)
8354 if (iverdefmem.vd_next
8355 > (size_t) (contents_end_def - (bfd_byte *) everdef))
8356 goto error_return_bad_verdef;
8358 everdef = ((Elf_External_Verdef *)
8359 ((bfd_byte *) everdef + iverdefmem.vd_next));
8362 if (default_imported_symver)
8364 if (freeidx > maxidx)
8370 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
8371 bfd_zalloc2 (abfd, maxidx, sizeof (Elf_Internal_Verdef));
8372 if (elf_tdata (abfd)->verdef == NULL)
8373 goto error_return_verdef;
8375 elf_tdata (abfd)->cverdefs = maxidx;
8377 everdef = (Elf_External_Verdef *) contents;
8378 iverdefarr = elf_tdata (abfd)->verdef;
8379 for (i = 0; i < hdr->sh_info; i++)
8381 Elf_External_Verdaux *everdaux;
8382 Elf_Internal_Verdaux *iverdaux;
8385 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
8387 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
8388 goto error_return_bad_verdef;
8390 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
8391 memcpy (iverdef, &iverdefmem, offsetof (Elf_Internal_Verdef, vd_bfd));
8393 iverdef->vd_bfd = abfd;
8395 if (iverdef->vd_cnt == 0)
8396 iverdef->vd_auxptr = NULL;
8399 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
8400 bfd_alloc2 (abfd, iverdef->vd_cnt,
8401 sizeof (Elf_Internal_Verdaux));
8402 if (iverdef->vd_auxptr == NULL)
8403 goto error_return_verdef;
8407 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
8408 goto error_return_bad_verdef;
8410 everdaux = ((Elf_External_Verdaux *)
8411 ((bfd_byte *) everdef + iverdef->vd_aux));
8412 iverdaux = iverdef->vd_auxptr;
8413 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
8415 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
8417 iverdaux->vda_nodename =
8418 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
8419 iverdaux->vda_name);
8420 if (iverdaux->vda_nodename == NULL)
8421 goto error_return_bad_verdef;
8423 iverdaux->vda_nextptr = NULL;
8424 if (iverdaux->vda_next == 0)
8426 iverdef->vd_cnt = j + 1;
8429 if (j + 1 < iverdef->vd_cnt)
8430 iverdaux->vda_nextptr = iverdaux + 1;
8432 if (iverdaux->vda_next
8433 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
8434 goto error_return_bad_verdef;
8436 everdaux = ((Elf_External_Verdaux *)
8437 ((bfd_byte *) everdaux + iverdaux->vda_next));
8440 iverdef->vd_nodename = NULL;
8441 if (iverdef->vd_cnt)
8442 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
8444 iverdef->vd_nextdef = NULL;
8445 if (iverdef->vd_next == 0)
8447 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
8448 iverdef->vd_nextdef = iverdef + 1;
8450 everdef = ((Elf_External_Verdef *)
8451 ((bfd_byte *) everdef + iverdef->vd_next));
8457 else if (default_imported_symver)
8464 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
8465 bfd_zalloc2 (abfd, freeidx, sizeof (Elf_Internal_Verdef));
8466 if (elf_tdata (abfd)->verdef == NULL)
8469 elf_tdata (abfd)->cverdefs = freeidx;
8472 /* Create a default version based on the soname. */
8473 if (default_imported_symver)
8475 Elf_Internal_Verdef *iverdef;
8476 Elf_Internal_Verdaux *iverdaux;
8478 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];
8480 iverdef->vd_version = VER_DEF_CURRENT;
8481 iverdef->vd_flags = 0;
8482 iverdef->vd_ndx = freeidx;
8483 iverdef->vd_cnt = 1;
8485 iverdef->vd_bfd = abfd;
8487 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
8488 if (iverdef->vd_nodename == NULL)
8489 goto error_return_verdef;
8490 iverdef->vd_nextdef = NULL;
8491 iverdef->vd_auxptr = ((struct elf_internal_verdaux *)
8492 bfd_zalloc (abfd, sizeof (Elf_Internal_Verdaux)));
8493 if (iverdef->vd_auxptr == NULL)
8494 goto error_return_verdef;
8496 iverdaux = iverdef->vd_auxptr;
8497 iverdaux->vda_nodename = iverdef->vd_nodename;
8503 if (contents != NULL)
8509 _bfd_elf_make_empty_symbol (bfd *abfd)
8511 elf_symbol_type *newsym;
8513 newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof * newsym);
8516 newsym->symbol.the_bfd = abfd;
8517 return &newsym->symbol;
8521 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
8525 bfd_symbol_info (symbol, ret);
8528 /* Return whether a symbol name implies a local symbol. Most targets
8529 use this function for the is_local_label_name entry point, but some
8533 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
8536 /* Normal local symbols start with ``.L''. */
8537 if (name[0] == '.' && name[1] == 'L')
8540 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
8541 DWARF debugging symbols starting with ``..''. */
8542 if (name[0] == '.' && name[1] == '.')
8545 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
8546 emitting DWARF debugging output. I suspect this is actually a
8547 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
8548 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
8549 underscore to be emitted on some ELF targets). For ease of use,
8550 we treat such symbols as local. */
8551 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
8554 /* Treat assembler generated fake symbols, dollar local labels and
8555 forward-backward labels (aka local labels) as locals.
8556 These labels have the form:
8558 L0^A.* (fake symbols)
8560 [.]?L[0123456789]+{^A|^B}[0123456789]* (local labels)
8562 Versions which start with .L will have already been matched above,
8563 so we only need to match the rest. */
8564 if (name[0] == 'L' && ISDIGIT (name[1]))
8566 bfd_boolean ret = FALSE;
8570 for (p = name + 2; (c = *p); p++)
8572 if (c == 1 || c == 2)
8574 if (c == 1 && p == name + 2)
8575 /* A fake symbol. */
8578 /* FIXME: We are being paranoid here and treating symbols like
8579 L0^Bfoo as if there were non-local, on the grounds that the
8580 assembler will never generate them. But can any symbol
8581 containing an ASCII value in the range 1-31 ever be anything
8582 other than some kind of local ? */
8599 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
8600 asymbol *symbol ATTRIBUTE_UNUSED)
8607 _bfd_elf_set_arch_mach (bfd *abfd,
8608 enum bfd_architecture arch,
8609 unsigned long machine)
8611 /* If this isn't the right architecture for this backend, and this
8612 isn't the generic backend, fail. */
8613 if (arch != get_elf_backend_data (abfd)->arch
8614 && arch != bfd_arch_unknown
8615 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
8618 return bfd_default_set_arch_mach (abfd, arch, machine);
8621 /* Find the nearest line to a particular section and offset,
8622 for error reporting. */
8625 _bfd_elf_find_nearest_line (bfd *abfd,
8629 const char **filename_ptr,
8630 const char **functionname_ptr,
8631 unsigned int *line_ptr,
8632 unsigned int *discriminator_ptr)
8636 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
8637 filename_ptr, functionname_ptr,
8638 line_ptr, discriminator_ptr,
8639 dwarf_debug_sections, 0,
8640 &elf_tdata (abfd)->dwarf2_find_line_info)
8641 || _bfd_dwarf1_find_nearest_line (abfd, symbols, section, offset,
8642 filename_ptr, functionname_ptr,
8645 if (!*functionname_ptr)
8646 _bfd_elf_find_function (abfd, symbols, section, offset,
8647 *filename_ptr ? NULL : filename_ptr,
8652 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
8653 &found, filename_ptr,
8654 functionname_ptr, line_ptr,
8655 &elf_tdata (abfd)->line_info))
8657 if (found && (*functionname_ptr || *line_ptr))
8660 if (symbols == NULL)
8663 if (! _bfd_elf_find_function (abfd, symbols, section, offset,
8664 filename_ptr, functionname_ptr))
8671 /* Find the line for a symbol. */
8674 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
8675 const char **filename_ptr, unsigned int *line_ptr)
8677 return _bfd_dwarf2_find_nearest_line (abfd, symbols, symbol, NULL, 0,
8678 filename_ptr, NULL, line_ptr, NULL,
8679 dwarf_debug_sections, 0,
8680 &elf_tdata (abfd)->dwarf2_find_line_info);
8683 /* After a call to bfd_find_nearest_line, successive calls to
8684 bfd_find_inliner_info can be used to get source information about
8685 each level of function inlining that terminated at the address
8686 passed to bfd_find_nearest_line. Currently this is only supported
8687 for DWARF2 with appropriate DWARF3 extensions. */
8690 _bfd_elf_find_inliner_info (bfd *abfd,
8691 const char **filename_ptr,
8692 const char **functionname_ptr,
8693 unsigned int *line_ptr)
8696 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
8697 functionname_ptr, line_ptr,
8698 & elf_tdata (abfd)->dwarf2_find_line_info);
8703 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
8705 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8706 int ret = bed->s->sizeof_ehdr;
8708 if (!bfd_link_relocatable (info))
8710 bfd_size_type phdr_size = elf_program_header_size (abfd);
8712 if (phdr_size == (bfd_size_type) -1)
8714 struct elf_segment_map *m;
8717 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
8718 phdr_size += bed->s->sizeof_phdr;
8721 phdr_size = get_program_header_size (abfd, info);
8724 elf_program_header_size (abfd) = phdr_size;
8732 _bfd_elf_set_section_contents (bfd *abfd,
8734 const void *location,
8736 bfd_size_type count)
8738 Elf_Internal_Shdr *hdr;
8741 if (! abfd->output_has_begun
8742 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
8748 hdr = &elf_section_data (section)->this_hdr;
8749 if (hdr->sh_offset == (file_ptr) -1)
8751 /* We must compress this section. Write output to the buffer. */
8752 unsigned char *contents = hdr->contents;
8753 if ((offset + count) > hdr->sh_size
8754 || (section->flags & SEC_ELF_COMPRESS) == 0
8755 || contents == NULL)
8757 memcpy (contents + offset, location, count);
8760 pos = hdr->sh_offset + offset;
8761 if (bfd_seek (abfd, pos, SEEK_SET) != 0
8762 || bfd_bwrite (location, count, abfd) != count)
8769 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
8770 arelent *cache_ptr ATTRIBUTE_UNUSED,
8771 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
8776 /* Try to convert a non-ELF reloc into an ELF one. */
8779 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
8781 /* Check whether we really have an ELF howto. */
8783 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
8785 bfd_reloc_code_real_type code;
8786 reloc_howto_type *howto;
8788 /* Alien reloc: Try to determine its type to replace it with an
8789 equivalent ELF reloc. */
8791 if (areloc->howto->pc_relative)
8793 switch (areloc->howto->bitsize)
8796 code = BFD_RELOC_8_PCREL;
8799 code = BFD_RELOC_12_PCREL;
8802 code = BFD_RELOC_16_PCREL;
8805 code = BFD_RELOC_24_PCREL;
8808 code = BFD_RELOC_32_PCREL;
8811 code = BFD_RELOC_64_PCREL;
8817 howto = bfd_reloc_type_lookup (abfd, code);
8819 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
8821 if (howto->pcrel_offset)
8822 areloc->addend += areloc->address;
8824 areloc->addend -= areloc->address; /* addend is unsigned!! */
8829 switch (areloc->howto->bitsize)
8835 code = BFD_RELOC_14;
8838 code = BFD_RELOC_16;
8841 code = BFD_RELOC_26;
8844 code = BFD_RELOC_32;
8847 code = BFD_RELOC_64;
8853 howto = bfd_reloc_type_lookup (abfd, code);
8857 areloc->howto = howto;
8866 /* xgettext:c-format */
8867 (_("%B: unsupported relocation type %s"),
8868 abfd, areloc->howto->name);
8869 bfd_set_error (bfd_error_bad_value);
8874 _bfd_elf_close_and_cleanup (bfd *abfd)
8876 struct elf_obj_tdata *tdata = elf_tdata (abfd);
8877 if (bfd_get_format (abfd) == bfd_object && tdata != NULL)
8879 if (elf_tdata (abfd)->o != NULL && elf_shstrtab (abfd) != NULL)
8880 _bfd_elf_strtab_free (elf_shstrtab (abfd));
8881 _bfd_dwarf2_cleanup_debug_info (abfd, &tdata->dwarf2_find_line_info);
8884 return _bfd_generic_close_and_cleanup (abfd);
8887 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
8888 in the relocation's offset. Thus we cannot allow any sort of sanity
8889 range-checking to interfere. There is nothing else to do in processing
8892 bfd_reloc_status_type
8893 _bfd_elf_rel_vtable_reloc_fn
8894 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
8895 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
8896 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
8897 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
8899 return bfd_reloc_ok;
8902 /* Elf core file support. Much of this only works on native
8903 toolchains, since we rely on knowing the
8904 machine-dependent procfs structure in order to pick
8905 out details about the corefile. */
8907 #ifdef HAVE_SYS_PROCFS_H
8908 /* Needed for new procfs interface on sparc-solaris. */
8909 # define _STRUCTURED_PROC 1
8910 # include <sys/procfs.h>
8913 /* Return a PID that identifies a "thread" for threaded cores, or the
8914 PID of the main process for non-threaded cores. */
8917 elfcore_make_pid (bfd *abfd)
8921 pid = elf_tdata (abfd)->core->lwpid;
8923 pid = elf_tdata (abfd)->core->pid;
8928 /* If there isn't a section called NAME, make one, using
8929 data from SECT. Note, this function will generate a
8930 reference to NAME, so you shouldn't deallocate or
8934 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
8938 if (bfd_get_section_by_name (abfd, name) != NULL)
8941 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
8945 sect2->size = sect->size;
8946 sect2->filepos = sect->filepos;
8947 sect2->alignment_power = sect->alignment_power;
8951 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
8952 actually creates up to two pseudosections:
8953 - For the single-threaded case, a section named NAME, unless
8954 such a section already exists.
8955 - For the multi-threaded case, a section named "NAME/PID", where
8956 PID is elfcore_make_pid (abfd).
8957 Both pseudosections have identical contents. */
8959 _bfd_elfcore_make_pseudosection (bfd *abfd,
8965 char *threaded_name;
8969 /* Build the section name. */
8971 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
8972 len = strlen (buf) + 1;
8973 threaded_name = (char *) bfd_alloc (abfd, len);
8974 if (threaded_name == NULL)
8976 memcpy (threaded_name, buf, len);
8978 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
8983 sect->filepos = filepos;
8984 sect->alignment_power = 2;
8986 return elfcore_maybe_make_sect (abfd, name, sect);
8989 /* prstatus_t exists on:
8991 linux 2.[01] + glibc
8995 #if defined (HAVE_PRSTATUS_T)
8998 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
9003 if (note->descsz == sizeof (prstatus_t))
9007 size = sizeof (prstat.pr_reg);
9008 offset = offsetof (prstatus_t, pr_reg);
9009 memcpy (&prstat, note->descdata, sizeof (prstat));
9011 /* Do not overwrite the core signal if it
9012 has already been set by another thread. */
9013 if (elf_tdata (abfd)->core->signal == 0)
9014 elf_tdata (abfd)->core->signal = prstat.pr_cursig;
9015 if (elf_tdata (abfd)->core->pid == 0)
9016 elf_tdata (abfd)->core->pid = prstat.pr_pid;
9018 /* pr_who exists on:
9021 pr_who doesn't exist on:
9024 #if defined (HAVE_PRSTATUS_T_PR_WHO)
9025 elf_tdata (abfd)->core->lwpid = prstat.pr_who;
9027 elf_tdata (abfd)->core->lwpid = prstat.pr_pid;
9030 #if defined (HAVE_PRSTATUS32_T)
9031 else if (note->descsz == sizeof (prstatus32_t))
9033 /* 64-bit host, 32-bit corefile */
9034 prstatus32_t prstat;
9036 size = sizeof (prstat.pr_reg);
9037 offset = offsetof (prstatus32_t, pr_reg);
9038 memcpy (&prstat, note->descdata, sizeof (prstat));
9040 /* Do not overwrite the core signal if it
9041 has already been set by another thread. */
9042 if (elf_tdata (abfd)->core->signal == 0)
9043 elf_tdata (abfd)->core->signal = prstat.pr_cursig;
9044 if (elf_tdata (abfd)->core->pid == 0)
9045 elf_tdata (abfd)->core->pid = prstat.pr_pid;
9047 /* pr_who exists on:
9050 pr_who doesn't exist on:
9053 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
9054 elf_tdata (abfd)->core->lwpid = prstat.pr_who;
9056 elf_tdata (abfd)->core->lwpid = prstat.pr_pid;
9059 #endif /* HAVE_PRSTATUS32_T */
9062 /* Fail - we don't know how to handle any other
9063 note size (ie. data object type). */
9067 /* Make a ".reg/999" section and a ".reg" section. */
9068 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
9069 size, note->descpos + offset);
9071 #endif /* defined (HAVE_PRSTATUS_T) */
9073 /* Create a pseudosection containing the exact contents of NOTE. */
9075 elfcore_make_note_pseudosection (bfd *abfd,
9077 Elf_Internal_Note *note)
9079 return _bfd_elfcore_make_pseudosection (abfd, name,
9080 note->descsz, note->descpos);
9083 /* There isn't a consistent prfpregset_t across platforms,
9084 but it doesn't matter, because we don't have to pick this
9085 data structure apart. */
9088 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
9090 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
9093 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
9094 type of NT_PRXFPREG. Just include the whole note's contents
9098 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
9100 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
9103 /* Linux dumps the Intel XSAVE extended state in a note named "LINUX"
9104 with a note type of NT_X86_XSTATE. Just include the whole note's
9105 contents literally. */
9108 elfcore_grok_xstatereg (bfd *abfd, Elf_Internal_Note *note)
9110 return elfcore_make_note_pseudosection (abfd, ".reg-xstate", note);
9114 elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note)
9116 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note);
9120 elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note)
9122 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note);
9126 elfcore_grok_s390_high_gprs (bfd *abfd, Elf_Internal_Note *note)
9128 return elfcore_make_note_pseudosection (abfd, ".reg-s390-high-gprs", note);
9132 elfcore_grok_s390_timer (bfd *abfd, Elf_Internal_Note *note)
9134 return elfcore_make_note_pseudosection (abfd, ".reg-s390-timer", note);
9138 elfcore_grok_s390_todcmp (bfd *abfd, Elf_Internal_Note *note)
9140 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todcmp", note);
9144 elfcore_grok_s390_todpreg (bfd *abfd, Elf_Internal_Note *note)
9146 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todpreg", note);
9150 elfcore_grok_s390_ctrs (bfd *abfd, Elf_Internal_Note *note)
9152 return elfcore_make_note_pseudosection (abfd, ".reg-s390-ctrs", note);
9156 elfcore_grok_s390_prefix (bfd *abfd, Elf_Internal_Note *note)
9158 return elfcore_make_note_pseudosection (abfd, ".reg-s390-prefix", note);
9162 elfcore_grok_s390_last_break (bfd *abfd, Elf_Internal_Note *note)
9164 return elfcore_make_note_pseudosection (abfd, ".reg-s390-last-break", note);
9168 elfcore_grok_s390_system_call (bfd *abfd, Elf_Internal_Note *note)
9170 return elfcore_make_note_pseudosection (abfd, ".reg-s390-system-call", note);
9174 elfcore_grok_s390_tdb (bfd *abfd, Elf_Internal_Note *note)
9176 return elfcore_make_note_pseudosection (abfd, ".reg-s390-tdb", note);
9180 elfcore_grok_s390_vxrs_low (bfd *abfd, Elf_Internal_Note *note)
9182 return elfcore_make_note_pseudosection (abfd, ".reg-s390-vxrs-low", note);
9186 elfcore_grok_s390_vxrs_high (bfd *abfd, Elf_Internal_Note *note)
9188 return elfcore_make_note_pseudosection (abfd, ".reg-s390-vxrs-high", note);
9192 elfcore_grok_s390_gs_cb (bfd *abfd, Elf_Internal_Note *note)
9194 return elfcore_make_note_pseudosection (abfd, ".reg-s390-gs-cb", note);
9198 elfcore_grok_s390_gs_bc (bfd *abfd, Elf_Internal_Note *note)
9200 return elfcore_make_note_pseudosection (abfd, ".reg-s390-gs-bc", note);
9204 elfcore_grok_arm_vfp (bfd *abfd, Elf_Internal_Note *note)
9206 return elfcore_make_note_pseudosection (abfd, ".reg-arm-vfp", note);
9210 elfcore_grok_aarch_tls (bfd *abfd, Elf_Internal_Note *note)
9212 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-tls", note);
9216 elfcore_grok_aarch_hw_break (bfd *abfd, Elf_Internal_Note *note)
9218 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-break", note);
9222 elfcore_grok_aarch_hw_watch (bfd *abfd, Elf_Internal_Note *note)
9224 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-watch", note);
9227 #if defined (HAVE_PRPSINFO_T)
9228 typedef prpsinfo_t elfcore_psinfo_t;
9229 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
9230 typedef prpsinfo32_t elfcore_psinfo32_t;
9234 #if defined (HAVE_PSINFO_T)
9235 typedef psinfo_t elfcore_psinfo_t;
9236 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
9237 typedef psinfo32_t elfcore_psinfo32_t;
9241 /* return a malloc'ed copy of a string at START which is at
9242 most MAX bytes long, possibly without a terminating '\0'.
9243 the copy will always have a terminating '\0'. */
9246 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
9249 char *end = (char *) memchr (start, '\0', max);
9257 dups = (char *) bfd_alloc (abfd, len + 1);
9261 memcpy (dups, start, len);
9267 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
9269 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
9271 if (note->descsz == sizeof (elfcore_psinfo_t))
9273 elfcore_psinfo_t psinfo;
9275 memcpy (&psinfo, note->descdata, sizeof (psinfo));
9277 #if defined (HAVE_PSINFO_T_PR_PID) || defined (HAVE_PRPSINFO_T_PR_PID)
9278 elf_tdata (abfd)->core->pid = psinfo.pr_pid;
9280 elf_tdata (abfd)->core->program
9281 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
9282 sizeof (psinfo.pr_fname));
9284 elf_tdata (abfd)->core->command
9285 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
9286 sizeof (psinfo.pr_psargs));
9288 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
9289 else if (note->descsz == sizeof (elfcore_psinfo32_t))
9291 /* 64-bit host, 32-bit corefile */
9292 elfcore_psinfo32_t psinfo;
9294 memcpy (&psinfo, note->descdata, sizeof (psinfo));
9296 #if defined (HAVE_PSINFO32_T_PR_PID) || defined (HAVE_PRPSINFO32_T_PR_PID)
9297 elf_tdata (abfd)->core->pid = psinfo.pr_pid;
9299 elf_tdata (abfd)->core->program
9300 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
9301 sizeof (psinfo.pr_fname));
9303 elf_tdata (abfd)->core->command
9304 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
9305 sizeof (psinfo.pr_psargs));
9311 /* Fail - we don't know how to handle any other
9312 note size (ie. data object type). */
9316 /* Note that for some reason, a spurious space is tacked
9317 onto the end of the args in some (at least one anyway)
9318 implementations, so strip it off if it exists. */
9321 char *command = elf_tdata (abfd)->core->command;
9322 int n = strlen (command);
9324 if (0 < n && command[n - 1] == ' ')
9325 command[n - 1] = '\0';
9330 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
9332 #if defined (HAVE_PSTATUS_T)
9334 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
9336 if (note->descsz == sizeof (pstatus_t)
9337 #if defined (HAVE_PXSTATUS_T)
9338 || note->descsz == sizeof (pxstatus_t)
9344 memcpy (&pstat, note->descdata, sizeof (pstat));
9346 elf_tdata (abfd)->core->pid = pstat.pr_pid;
9348 #if defined (HAVE_PSTATUS32_T)
9349 else if (note->descsz == sizeof (pstatus32_t))
9351 /* 64-bit host, 32-bit corefile */
9354 memcpy (&pstat, note->descdata, sizeof (pstat));
9356 elf_tdata (abfd)->core->pid = pstat.pr_pid;
9359 /* Could grab some more details from the "representative"
9360 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
9361 NT_LWPSTATUS note, presumably. */
9365 #endif /* defined (HAVE_PSTATUS_T) */
9367 #if defined (HAVE_LWPSTATUS_T)
9369 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
9371 lwpstatus_t lwpstat;
9377 if (note->descsz != sizeof (lwpstat)
9378 #if defined (HAVE_LWPXSTATUS_T)
9379 && note->descsz != sizeof (lwpxstatus_t)
9384 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
9386 elf_tdata (abfd)->core->lwpid = lwpstat.pr_lwpid;
9387 /* Do not overwrite the core signal if it has already been set by
9389 if (elf_tdata (abfd)->core->signal == 0)
9390 elf_tdata (abfd)->core->signal = lwpstat.pr_cursig;
9392 /* Make a ".reg/999" section. */
9394 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
9395 len = strlen (buf) + 1;
9396 name = bfd_alloc (abfd, len);
9399 memcpy (name, buf, len);
9401 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9405 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
9406 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
9407 sect->filepos = note->descpos
9408 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
9411 #if defined (HAVE_LWPSTATUS_T_PR_REG)
9412 sect->size = sizeof (lwpstat.pr_reg);
9413 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
9416 sect->alignment_power = 2;
9418 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
9421 /* Make a ".reg2/999" section */
9423 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
9424 len = strlen (buf) + 1;
9425 name = bfd_alloc (abfd, len);
9428 memcpy (name, buf, len);
9430 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9434 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
9435 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
9436 sect->filepos = note->descpos
9437 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
9440 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
9441 sect->size = sizeof (lwpstat.pr_fpreg);
9442 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
9445 sect->alignment_power = 2;
9447 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
9449 #endif /* defined (HAVE_LWPSTATUS_T) */
9452 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
9459 int is_active_thread;
9462 if (note->descsz < 728)
9465 if (! CONST_STRNEQ (note->namedata, "win32"))
9468 type = bfd_get_32 (abfd, note->descdata);
9472 case 1 /* NOTE_INFO_PROCESS */:
9473 /* FIXME: need to add ->core->command. */
9474 /* process_info.pid */
9475 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 8);
9476 /* process_info.signal */
9477 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 12);
9480 case 2 /* NOTE_INFO_THREAD */:
9481 /* Make a ".reg/999" section. */
9482 /* thread_info.tid */
9483 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
9485 len = strlen (buf) + 1;
9486 name = (char *) bfd_alloc (abfd, len);
9490 memcpy (name, buf, len);
9492 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9496 /* sizeof (thread_info.thread_context) */
9498 /* offsetof (thread_info.thread_context) */
9499 sect->filepos = note->descpos + 12;
9500 sect->alignment_power = 2;
9502 /* thread_info.is_active_thread */
9503 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
9505 if (is_active_thread)
9506 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
9510 case 3 /* NOTE_INFO_MODULE */:
9511 /* Make a ".module/xxxxxxxx" section. */
9512 /* module_info.base_address */
9513 base_addr = bfd_get_32 (abfd, note->descdata + 4);
9514 sprintf (buf, ".module/%08lx", (unsigned long) base_addr);
9516 len = strlen (buf) + 1;
9517 name = (char *) bfd_alloc (abfd, len);
9521 memcpy (name, buf, len);
9523 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9528 sect->size = note->descsz;
9529 sect->filepos = note->descpos;
9530 sect->alignment_power = 2;
9541 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
9543 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9551 if (bed->elf_backend_grok_prstatus)
9552 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
9554 #if defined (HAVE_PRSTATUS_T)
9555 return elfcore_grok_prstatus (abfd, note);
9560 #if defined (HAVE_PSTATUS_T)
9562 return elfcore_grok_pstatus (abfd, note);
9565 #if defined (HAVE_LWPSTATUS_T)
9567 return elfcore_grok_lwpstatus (abfd, note);
9570 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
9571 return elfcore_grok_prfpreg (abfd, note);
9573 case NT_WIN32PSTATUS:
9574 return elfcore_grok_win32pstatus (abfd, note);
9576 case NT_PRXFPREG: /* Linux SSE extension */
9577 if (note->namesz == 6
9578 && strcmp (note->namedata, "LINUX") == 0)
9579 return elfcore_grok_prxfpreg (abfd, note);
9583 case NT_X86_XSTATE: /* Linux XSAVE extension */
9584 if (note->namesz == 6
9585 && strcmp (note->namedata, "LINUX") == 0)
9586 return elfcore_grok_xstatereg (abfd, note);
9591 if (note->namesz == 6
9592 && strcmp (note->namedata, "LINUX") == 0)
9593 return elfcore_grok_ppc_vmx (abfd, note);
9598 if (note->namesz == 6
9599 && strcmp (note->namedata, "LINUX") == 0)
9600 return elfcore_grok_ppc_vsx (abfd, note);
9604 case NT_S390_HIGH_GPRS:
9605 if (note->namesz == 6
9606 && strcmp (note->namedata, "LINUX") == 0)
9607 return elfcore_grok_s390_high_gprs (abfd, note);
9612 if (note->namesz == 6
9613 && strcmp (note->namedata, "LINUX") == 0)
9614 return elfcore_grok_s390_timer (abfd, note);
9618 case NT_S390_TODCMP:
9619 if (note->namesz == 6
9620 && strcmp (note->namedata, "LINUX") == 0)
9621 return elfcore_grok_s390_todcmp (abfd, note);
9625 case NT_S390_TODPREG:
9626 if (note->namesz == 6
9627 && strcmp (note->namedata, "LINUX") == 0)
9628 return elfcore_grok_s390_todpreg (abfd, note);
9633 if (note->namesz == 6
9634 && strcmp (note->namedata, "LINUX") == 0)
9635 return elfcore_grok_s390_ctrs (abfd, note);
9639 case NT_S390_PREFIX:
9640 if (note->namesz == 6
9641 && strcmp (note->namedata, "LINUX") == 0)
9642 return elfcore_grok_s390_prefix (abfd, note);
9646 case NT_S390_LAST_BREAK:
9647 if (note->namesz == 6
9648 && strcmp (note->namedata, "LINUX") == 0)
9649 return elfcore_grok_s390_last_break (abfd, note);
9653 case NT_S390_SYSTEM_CALL:
9654 if (note->namesz == 6
9655 && strcmp (note->namedata, "LINUX") == 0)
9656 return elfcore_grok_s390_system_call (abfd, note);
9661 if (note->namesz == 6
9662 && strcmp (note->namedata, "LINUX") == 0)
9663 return elfcore_grok_s390_tdb (abfd, note);
9667 case NT_S390_VXRS_LOW:
9668 if (note->namesz == 6
9669 && strcmp (note->namedata, "LINUX") == 0)
9670 return elfcore_grok_s390_vxrs_low (abfd, note);
9674 case NT_S390_VXRS_HIGH:
9675 if (note->namesz == 6
9676 && strcmp (note->namedata, "LINUX") == 0)
9677 return elfcore_grok_s390_vxrs_high (abfd, note);
9682 if (note->namesz == 6
9683 && strcmp (note->namedata, "LINUX") == 0)
9684 return elfcore_grok_s390_gs_bc (abfd, note);
9689 if (note->namesz == 6
9690 && strcmp (note->namedata, "LINUX") == 0)
9691 return elfcore_grok_s390_gs_cb (abfd, note);
9696 if (note->namesz == 6
9697 && strcmp (note->namedata, "LINUX") == 0)
9698 return elfcore_grok_arm_vfp (abfd, note);
9703 if (note->namesz == 6
9704 && strcmp (note->namedata, "LINUX") == 0)
9705 return elfcore_grok_aarch_tls (abfd, note);
9709 case NT_ARM_HW_BREAK:
9710 if (note->namesz == 6
9711 && strcmp (note->namedata, "LINUX") == 0)
9712 return elfcore_grok_aarch_hw_break (abfd, note);
9716 case NT_ARM_HW_WATCH:
9717 if (note->namesz == 6
9718 && strcmp (note->namedata, "LINUX") == 0)
9719 return elfcore_grok_aarch_hw_watch (abfd, note);
9725 if (bed->elf_backend_grok_psinfo)
9726 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
9728 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
9729 return elfcore_grok_psinfo (abfd, note);
9736 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
9741 sect->size = note->descsz;
9742 sect->filepos = note->descpos;
9743 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
9749 return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.file",
9753 return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.siginfo",
9760 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
9762 struct bfd_build_id* build_id;
9764 if (note->descsz == 0)
9767 build_id = bfd_alloc (abfd, sizeof (struct bfd_build_id) - 1 + note->descsz);
9768 if (build_id == NULL)
9771 build_id->size = note->descsz;
9772 memcpy (build_id->data, note->descdata, note->descsz);
9773 abfd->build_id = build_id;
9779 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
9786 case NT_GNU_PROPERTY_TYPE_0:
9787 return _bfd_elf_parse_gnu_properties (abfd, note);
9789 case NT_GNU_BUILD_ID:
9790 return elfobj_grok_gnu_build_id (abfd, note);
9795 elfobj_grok_stapsdt_note_1 (bfd *abfd, Elf_Internal_Note *note)
9797 struct sdt_note *cur =
9798 (struct sdt_note *) bfd_alloc (abfd, sizeof (struct sdt_note)
9801 cur->next = (struct sdt_note *) (elf_tdata (abfd))->sdt_note_head;
9802 cur->size = (bfd_size_type) note->descsz;
9803 memcpy (cur->data, note->descdata, note->descsz);
9805 elf_tdata (abfd)->sdt_note_head = cur;
9811 elfobj_grok_stapsdt_note (bfd *abfd, Elf_Internal_Note *note)
9816 return elfobj_grok_stapsdt_note_1 (abfd, note);
9824 elfcore_grok_freebsd_psinfo (bfd *abfd, Elf_Internal_Note *note)
9828 switch (elf_elfheader (abfd)->e_ident[EI_CLASS])
9831 if (note->descsz < 108)
9836 if (note->descsz < 120)
9844 /* Check for version 1 in pr_version. */
9845 if (bfd_h_get_32 (abfd, (bfd_byte *) note->descdata) != 1)
9849 /* Skip over pr_psinfosz. */
9850 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS32)
9854 offset += 4; /* Padding before pr_psinfosz. */
9858 /* pr_fname is PRFNAMESZ (16) + 1 bytes in size. */
9859 elf_tdata (abfd)->core->program
9860 = _bfd_elfcore_strndup (abfd, note->descdata + offset, 17);
9863 /* pr_psargs is PRARGSZ (80) + 1 bytes in size. */
9864 elf_tdata (abfd)->core->command
9865 = _bfd_elfcore_strndup (abfd, note->descdata + offset, 81);
9868 /* Padding before pr_pid. */
9871 /* The pr_pid field was added in version "1a". */
9872 if (note->descsz < offset + 4)
9875 elf_tdata (abfd)->core->pid
9876 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
9882 elfcore_grok_freebsd_prstatus (bfd *abfd, Elf_Internal_Note *note)
9887 /* Check for version 1 in pr_version. */
9888 if (bfd_h_get_32 (abfd, (bfd_byte *) note->descdata) != 1)
9892 /* Skip over pr_statussz. */
9893 switch (elf_elfheader (abfd)->e_ident[EI_CLASS])
9900 offset += 4; /* Padding before pr_statussz. */
9908 /* Extract size of pr_reg from pr_gregsetsz. */
9909 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS32)
9910 size = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
9912 size = bfd_h_get_64 (abfd, (bfd_byte *) note->descdata + offset);
9914 /* Skip over pr_gregsetsz and pr_fpregsetsz. */
9915 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS32)
9920 /* Skip over pr_osreldate. */
9923 /* Read signal from pr_cursig. */
9924 if (elf_tdata (abfd)->core->signal == 0)
9925 elf_tdata (abfd)->core->signal
9926 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
9929 /* Read TID from pr_pid. */
9930 elf_tdata (abfd)->core->lwpid
9931 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset);
9934 /* Padding before pr_reg. */
9935 if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS64)
9938 /* Make a ".reg/999" section and a ".reg" section. */
9939 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
9940 size, note->descpos + offset);
9944 elfcore_grok_freebsd_note (bfd *abfd, Elf_Internal_Note *note)
9949 return elfcore_grok_freebsd_prstatus (abfd, note);
9952 return elfcore_grok_prfpreg (abfd, note);
9955 return elfcore_grok_freebsd_psinfo (abfd, note);
9957 case NT_FREEBSD_THRMISC:
9958 if (note->namesz == 8)
9959 return elfcore_make_note_pseudosection (abfd, ".thrmisc", note);
9963 case NT_FREEBSD_PROCSTAT_AUXV:
9965 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
9970 sect->size = note->descsz - 4;
9971 sect->filepos = note->descpos + 4;
9972 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
9978 if (note->namesz == 8)
9979 return elfcore_grok_xstatereg (abfd, note);
9983 case NT_FREEBSD_PTLWPINFO:
9984 return elfcore_make_note_pseudosection (abfd, ".note.freebsdcore.lwpinfo",
9993 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
9997 cp = strchr (note->namedata, '@');
10000 *lwpidp = atoi(cp + 1);
10007 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
10009 /* Signal number at offset 0x08. */
10010 elf_tdata (abfd)->core->signal
10011 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
10013 /* Process ID at offset 0x50. */
10014 elf_tdata (abfd)->core->pid
10015 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
10017 /* Command name at 0x7c (max 32 bytes, including nul). */
10018 elf_tdata (abfd)->core->command
10019 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
10021 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
10026 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
10030 if (elfcore_netbsd_get_lwpid (note, &lwp))
10031 elf_tdata (abfd)->core->lwpid = lwp;
10033 if (note->type == NT_NETBSDCORE_PROCINFO)
10035 /* NetBSD-specific core "procinfo". Note that we expect to
10036 find this note before any of the others, which is fine,
10037 since the kernel writes this note out first when it
10038 creates a core file. */
10040 return elfcore_grok_netbsd_procinfo (abfd, note);
10043 /* As of Jan 2002 there are no other machine-independent notes
10044 defined for NetBSD core files. If the note type is less
10045 than the start of the machine-dependent note types, we don't
10048 if (note->type < NT_NETBSDCORE_FIRSTMACH)
10052 switch (bfd_get_arch (abfd))
10054 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
10055 PT_GETFPREGS == mach+2. */
10057 case bfd_arch_alpha:
10058 case bfd_arch_sparc:
10059 switch (note->type)
10061 case NT_NETBSDCORE_FIRSTMACH+0:
10062 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10064 case NT_NETBSDCORE_FIRSTMACH+2:
10065 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10071 /* On all other arch's, PT_GETREGS == mach+1 and
10072 PT_GETFPREGS == mach+3. */
10075 switch (note->type)
10077 case NT_NETBSDCORE_FIRSTMACH+1:
10078 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10080 case NT_NETBSDCORE_FIRSTMACH+3:
10081 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10091 elfcore_grok_openbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
10093 /* Signal number at offset 0x08. */
10094 elf_tdata (abfd)->core->signal
10095 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
10097 /* Process ID at offset 0x20. */
10098 elf_tdata (abfd)->core->pid
10099 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x20);
10101 /* Command name at 0x48 (max 32 bytes, including nul). */
10102 elf_tdata (abfd)->core->command
10103 = _bfd_elfcore_strndup (abfd, note->descdata + 0x48, 31);
10109 elfcore_grok_openbsd_note (bfd *abfd, Elf_Internal_Note *note)
10111 if (note->type == NT_OPENBSD_PROCINFO)
10112 return elfcore_grok_openbsd_procinfo (abfd, note);
10114 if (note->type == NT_OPENBSD_REGS)
10115 return elfcore_make_note_pseudosection (abfd, ".reg", note);
10117 if (note->type == NT_OPENBSD_FPREGS)
10118 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
10120 if (note->type == NT_OPENBSD_XFPREGS)
10121 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
10123 if (note->type == NT_OPENBSD_AUXV)
10125 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
10130 sect->size = note->descsz;
10131 sect->filepos = note->descpos;
10132 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
10137 if (note->type == NT_OPENBSD_WCOOKIE)
10139 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
10144 sect->size = note->descsz;
10145 sect->filepos = note->descpos;
10146 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
10155 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
10157 void *ddata = note->descdata;
10164 /* nto_procfs_status 'pid' field is at offset 0. */
10165 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
10167 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
10168 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
10170 /* nto_procfs_status 'flags' field is at offset 8. */
10171 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
10173 /* nto_procfs_status 'what' field is at offset 14. */
10174 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
10176 elf_tdata (abfd)->core->signal = sig;
10177 elf_tdata (abfd)->core->lwpid = *tid;
10180 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
10181 do not come from signals so we make sure we set the current
10182 thread just in case. */
10183 if (flags & 0x00000080)
10184 elf_tdata (abfd)->core->lwpid = *tid;
10186 /* Make a ".qnx_core_status/%d" section. */
10187 sprintf (buf, ".qnx_core_status/%ld", *tid);
10189 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
10192 strcpy (name, buf);
10194 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10198 sect->size = note->descsz;
10199 sect->filepos = note->descpos;
10200 sect->alignment_power = 2;
10202 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
10206 elfcore_grok_nto_regs (bfd *abfd,
10207 Elf_Internal_Note *note,
10215 /* Make a "(base)/%d" section. */
10216 sprintf (buf, "%s/%ld", base, tid);
10218 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
10221 strcpy (name, buf);
10223 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10227 sect->size = note->descsz;
10228 sect->filepos = note->descpos;
10229 sect->alignment_power = 2;
10231 /* This is the current thread. */
10232 if (elf_tdata (abfd)->core->lwpid == tid)
10233 return elfcore_maybe_make_sect (abfd, base, sect);
10238 #define BFD_QNT_CORE_INFO 7
10239 #define BFD_QNT_CORE_STATUS 8
10240 #define BFD_QNT_CORE_GREG 9
10241 #define BFD_QNT_CORE_FPREG 10
10244 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
10246 /* Every GREG section has a STATUS section before it. Store the
10247 tid from the previous call to pass down to the next gregs
10249 static long tid = 1;
10251 switch (note->type)
10253 case BFD_QNT_CORE_INFO:
10254 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
10255 case BFD_QNT_CORE_STATUS:
10256 return elfcore_grok_nto_status (abfd, note, &tid);
10257 case BFD_QNT_CORE_GREG:
10258 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
10259 case BFD_QNT_CORE_FPREG:
10260 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
10267 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
10273 /* Use note name as section name. */
10274 len = note->namesz;
10275 name = (char *) bfd_alloc (abfd, len);
10278 memcpy (name, note->namedata, len);
10279 name[len - 1] = '\0';
10281 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
10285 sect->size = note->descsz;
10286 sect->filepos = note->descpos;
10287 sect->alignment_power = 1;
10292 /* Function: elfcore_write_note
10295 buffer to hold note, and current size of buffer
10299 size of data for note
10301 Writes note to end of buffer. ELF64 notes are written exactly as
10302 for ELF32, despite the current (as of 2006) ELF gabi specifying
10303 that they ought to have 8-byte namesz and descsz field, and have
10304 8-byte alignment. Other writers, eg. Linux kernel, do the same.
10307 Pointer to realloc'd buffer, *BUFSIZ updated. */
10310 elfcore_write_note (bfd *abfd,
10318 Elf_External_Note *xnp;
10325 namesz = strlen (name) + 1;
10327 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
10329 buf = (char *) realloc (buf, *bufsiz + newspace);
10332 dest = buf + *bufsiz;
10333 *bufsiz += newspace;
10334 xnp = (Elf_External_Note *) dest;
10335 H_PUT_32 (abfd, namesz, xnp->namesz);
10336 H_PUT_32 (abfd, size, xnp->descsz);
10337 H_PUT_32 (abfd, type, xnp->type);
10341 memcpy (dest, name, namesz);
10349 memcpy (dest, input, size);
10360 elfcore_write_prpsinfo (bfd *abfd,
10364 const char *psargs)
10366 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10368 if (bed->elf_backend_write_core_note != NULL)
10371 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
10372 NT_PRPSINFO, fname, psargs);
10377 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
10378 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
10379 if (bed->s->elfclass == ELFCLASS32)
10381 #if defined (HAVE_PSINFO32_T)
10383 int note_type = NT_PSINFO;
10386 int note_type = NT_PRPSINFO;
10389 memset (&data, 0, sizeof (data));
10390 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
10391 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
10392 return elfcore_write_note (abfd, buf, bufsiz,
10393 "CORE", note_type, &data, sizeof (data));
10398 #if defined (HAVE_PSINFO_T)
10400 int note_type = NT_PSINFO;
10403 int note_type = NT_PRPSINFO;
10406 memset (&data, 0, sizeof (data));
10407 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
10408 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
10409 return elfcore_write_note (abfd, buf, bufsiz,
10410 "CORE", note_type, &data, sizeof (data));
10412 #endif /* PSINFO_T or PRPSINFO_T */
10419 elfcore_write_linux_prpsinfo32
10420 (bfd *abfd, char *buf, int *bufsiz,
10421 const struct elf_internal_linux_prpsinfo *prpsinfo)
10423 struct elf_external_linux_prpsinfo32 data;
10425 swap_linux_prpsinfo32_out (abfd, prpsinfo, &data);
10426 return elfcore_write_note (abfd, buf, bufsiz, "CORE", NT_PRPSINFO,
10427 &data, sizeof (data));
10431 elfcore_write_linux_prpsinfo64
10432 (bfd *abfd, char *buf, int *bufsiz,
10433 const struct elf_internal_linux_prpsinfo *prpsinfo)
10435 struct elf_external_linux_prpsinfo64 data;
10437 swap_linux_prpsinfo64_out (abfd, prpsinfo, &data);
10438 return elfcore_write_note (abfd, buf, bufsiz,
10439 "CORE", NT_PRPSINFO, &data, sizeof (data));
10443 elfcore_write_prstatus (bfd *abfd,
10450 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10452 if (bed->elf_backend_write_core_note != NULL)
10455 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
10457 pid, cursig, gregs);
10462 #if defined (HAVE_PRSTATUS_T)
10463 #if defined (HAVE_PRSTATUS32_T)
10464 if (bed->s->elfclass == ELFCLASS32)
10466 prstatus32_t prstat;
10468 memset (&prstat, 0, sizeof (prstat));
10469 prstat.pr_pid = pid;
10470 prstat.pr_cursig = cursig;
10471 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
10472 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
10473 NT_PRSTATUS, &prstat, sizeof (prstat));
10480 memset (&prstat, 0, sizeof (prstat));
10481 prstat.pr_pid = pid;
10482 prstat.pr_cursig = cursig;
10483 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
10484 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
10485 NT_PRSTATUS, &prstat, sizeof (prstat));
10487 #endif /* HAVE_PRSTATUS_T */
10493 #if defined (HAVE_LWPSTATUS_T)
10495 elfcore_write_lwpstatus (bfd *abfd,
10502 lwpstatus_t lwpstat;
10503 const char *note_name = "CORE";
10505 memset (&lwpstat, 0, sizeof (lwpstat));
10506 lwpstat.pr_lwpid = pid >> 16;
10507 lwpstat.pr_cursig = cursig;
10508 #if defined (HAVE_LWPSTATUS_T_PR_REG)
10509 memcpy (&lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
10510 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
10511 #if !defined(gregs)
10512 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
10513 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
10515 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
10516 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
10519 return elfcore_write_note (abfd, buf, bufsiz, note_name,
10520 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
10522 #endif /* HAVE_LWPSTATUS_T */
10524 #if defined (HAVE_PSTATUS_T)
10526 elfcore_write_pstatus (bfd *abfd,
10530 int cursig ATTRIBUTE_UNUSED,
10531 const void *gregs ATTRIBUTE_UNUSED)
10533 const char *note_name = "CORE";
10534 #if defined (HAVE_PSTATUS32_T)
10535 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
10537 if (bed->s->elfclass == ELFCLASS32)
10541 memset (&pstat, 0, sizeof (pstat));
10542 pstat.pr_pid = pid & 0xffff;
10543 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
10544 NT_PSTATUS, &pstat, sizeof (pstat));
10552 memset (&pstat, 0, sizeof (pstat));
10553 pstat.pr_pid = pid & 0xffff;
10554 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
10555 NT_PSTATUS, &pstat, sizeof (pstat));
10559 #endif /* HAVE_PSTATUS_T */
10562 elfcore_write_prfpreg (bfd *abfd,
10565 const void *fpregs,
10568 const char *note_name = "CORE";
10569 return elfcore_write_note (abfd, buf, bufsiz,
10570 note_name, NT_FPREGSET, fpregs, size);
10574 elfcore_write_prxfpreg (bfd *abfd,
10577 const void *xfpregs,
10580 char *note_name = "LINUX";
10581 return elfcore_write_note (abfd, buf, bufsiz,
10582 note_name, NT_PRXFPREG, xfpregs, size);
10586 elfcore_write_xstatereg (bfd *abfd, char *buf, int *bufsiz,
10587 const void *xfpregs, int size)
10590 if (get_elf_backend_data (abfd)->elf_osabi == ELFOSABI_FREEBSD)
10591 note_name = "FreeBSD";
10593 note_name = "LINUX";
10594 return elfcore_write_note (abfd, buf, bufsiz,
10595 note_name, NT_X86_XSTATE, xfpregs, size);
10599 elfcore_write_ppc_vmx (bfd *abfd,
10602 const void *ppc_vmx,
10605 char *note_name = "LINUX";
10606 return elfcore_write_note (abfd, buf, bufsiz,
10607 note_name, NT_PPC_VMX, ppc_vmx, size);
10611 elfcore_write_ppc_vsx (bfd *abfd,
10614 const void *ppc_vsx,
10617 char *note_name = "LINUX";
10618 return elfcore_write_note (abfd, buf, bufsiz,
10619 note_name, NT_PPC_VSX, ppc_vsx, size);
10623 elfcore_write_s390_high_gprs (bfd *abfd,
10626 const void *s390_high_gprs,
10629 char *note_name = "LINUX";
10630 return elfcore_write_note (abfd, buf, bufsiz,
10631 note_name, NT_S390_HIGH_GPRS,
10632 s390_high_gprs, size);
10636 elfcore_write_s390_timer (bfd *abfd,
10639 const void *s390_timer,
10642 char *note_name = "LINUX";
10643 return elfcore_write_note (abfd, buf, bufsiz,
10644 note_name, NT_S390_TIMER, s390_timer, size);
10648 elfcore_write_s390_todcmp (bfd *abfd,
10651 const void *s390_todcmp,
10654 char *note_name = "LINUX";
10655 return elfcore_write_note (abfd, buf, bufsiz,
10656 note_name, NT_S390_TODCMP, s390_todcmp, size);
10660 elfcore_write_s390_todpreg (bfd *abfd,
10663 const void *s390_todpreg,
10666 char *note_name = "LINUX";
10667 return elfcore_write_note (abfd, buf, bufsiz,
10668 note_name, NT_S390_TODPREG, s390_todpreg, size);
10672 elfcore_write_s390_ctrs (bfd *abfd,
10675 const void *s390_ctrs,
10678 char *note_name = "LINUX";
10679 return elfcore_write_note (abfd, buf, bufsiz,
10680 note_name, NT_S390_CTRS, s390_ctrs, size);
10684 elfcore_write_s390_prefix (bfd *abfd,
10687 const void *s390_prefix,
10690 char *note_name = "LINUX";
10691 return elfcore_write_note (abfd, buf, bufsiz,
10692 note_name, NT_S390_PREFIX, s390_prefix, size);
10696 elfcore_write_s390_last_break (bfd *abfd,
10699 const void *s390_last_break,
10702 char *note_name = "LINUX";
10703 return elfcore_write_note (abfd, buf, bufsiz,
10704 note_name, NT_S390_LAST_BREAK,
10705 s390_last_break, size);
10709 elfcore_write_s390_system_call (bfd *abfd,
10712 const void *s390_system_call,
10715 char *note_name = "LINUX";
10716 return elfcore_write_note (abfd, buf, bufsiz,
10717 note_name, NT_S390_SYSTEM_CALL,
10718 s390_system_call, size);
10722 elfcore_write_s390_tdb (bfd *abfd,
10725 const void *s390_tdb,
10728 char *note_name = "LINUX";
10729 return elfcore_write_note (abfd, buf, bufsiz,
10730 note_name, NT_S390_TDB, s390_tdb, size);
10734 elfcore_write_s390_vxrs_low (bfd *abfd,
10737 const void *s390_vxrs_low,
10740 char *note_name = "LINUX";
10741 return elfcore_write_note (abfd, buf, bufsiz,
10742 note_name, NT_S390_VXRS_LOW, s390_vxrs_low, size);
10746 elfcore_write_s390_vxrs_high (bfd *abfd,
10749 const void *s390_vxrs_high,
10752 char *note_name = "LINUX";
10753 return elfcore_write_note (abfd, buf, bufsiz,
10754 note_name, NT_S390_VXRS_HIGH,
10755 s390_vxrs_high, size);
10759 elfcore_write_s390_gs_cb (bfd *abfd,
10762 const void *s390_gs_cb,
10765 char *note_name = "LINUX";
10766 return elfcore_write_note (abfd, buf, bufsiz,
10767 note_name, NT_S390_GS_CB,
10772 elfcore_write_s390_gs_bc (bfd *abfd,
10775 const void *s390_gs_bc,
10778 char *note_name = "LINUX";
10779 return elfcore_write_note (abfd, buf, bufsiz,
10780 note_name, NT_S390_GS_BC,
10785 elfcore_write_arm_vfp (bfd *abfd,
10788 const void *arm_vfp,
10791 char *note_name = "LINUX";
10792 return elfcore_write_note (abfd, buf, bufsiz,
10793 note_name, NT_ARM_VFP, arm_vfp, size);
10797 elfcore_write_aarch_tls (bfd *abfd,
10800 const void *aarch_tls,
10803 char *note_name = "LINUX";
10804 return elfcore_write_note (abfd, buf, bufsiz,
10805 note_name, NT_ARM_TLS, aarch_tls, size);
10809 elfcore_write_aarch_hw_break (bfd *abfd,
10812 const void *aarch_hw_break,
10815 char *note_name = "LINUX";
10816 return elfcore_write_note (abfd, buf, bufsiz,
10817 note_name, NT_ARM_HW_BREAK, aarch_hw_break, size);
10821 elfcore_write_aarch_hw_watch (bfd *abfd,
10824 const void *aarch_hw_watch,
10827 char *note_name = "LINUX";
10828 return elfcore_write_note (abfd, buf, bufsiz,
10829 note_name, NT_ARM_HW_WATCH, aarch_hw_watch, size);
10833 elfcore_write_register_note (bfd *abfd,
10836 const char *section,
10840 if (strcmp (section, ".reg2") == 0)
10841 return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size);
10842 if (strcmp (section, ".reg-xfp") == 0)
10843 return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
10844 if (strcmp (section, ".reg-xstate") == 0)
10845 return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size);
10846 if (strcmp (section, ".reg-ppc-vmx") == 0)
10847 return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
10848 if (strcmp (section, ".reg-ppc-vsx") == 0)
10849 return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size);
10850 if (strcmp (section, ".reg-s390-high-gprs") == 0)
10851 return elfcore_write_s390_high_gprs (abfd, buf, bufsiz, data, size);
10852 if (strcmp (section, ".reg-s390-timer") == 0)
10853 return elfcore_write_s390_timer (abfd, buf, bufsiz, data, size);
10854 if (strcmp (section, ".reg-s390-todcmp") == 0)
10855 return elfcore_write_s390_todcmp (abfd, buf, bufsiz, data, size);
10856 if (strcmp (section, ".reg-s390-todpreg") == 0)
10857 return elfcore_write_s390_todpreg (abfd, buf, bufsiz, data, size);
10858 if (strcmp (section, ".reg-s390-ctrs") == 0)
10859 return elfcore_write_s390_ctrs (abfd, buf, bufsiz, data, size);
10860 if (strcmp (section, ".reg-s390-prefix") == 0)
10861 return elfcore_write_s390_prefix (abfd, buf, bufsiz, data, size);
10862 if (strcmp (section, ".reg-s390-last-break") == 0)
10863 return elfcore_write_s390_last_break (abfd, buf, bufsiz, data, size);
10864 if (strcmp (section, ".reg-s390-system-call") == 0)
10865 return elfcore_write_s390_system_call (abfd, buf, bufsiz, data, size);
10866 if (strcmp (section, ".reg-s390-tdb") == 0)
10867 return elfcore_write_s390_tdb (abfd, buf, bufsiz, data, size);
10868 if (strcmp (section, ".reg-s390-vxrs-low") == 0)
10869 return elfcore_write_s390_vxrs_low (abfd, buf, bufsiz, data, size);
10870 if (strcmp (section, ".reg-s390-vxrs-high") == 0)
10871 return elfcore_write_s390_vxrs_high (abfd, buf, bufsiz, data, size);
10872 if (strcmp (section, ".reg-s390-gs-cb") == 0)
10873 return elfcore_write_s390_gs_cb (abfd, buf, bufsiz, data, size);
10874 if (strcmp (section, ".reg-s390-gs-bc") == 0)
10875 return elfcore_write_s390_gs_bc (abfd, buf, bufsiz, data, size);
10876 if (strcmp (section, ".reg-arm-vfp") == 0)
10877 return elfcore_write_arm_vfp (abfd, buf, bufsiz, data, size);
10878 if (strcmp (section, ".reg-aarch-tls") == 0)
10879 return elfcore_write_aarch_tls (abfd, buf, bufsiz, data, size);
10880 if (strcmp (section, ".reg-aarch-hw-break") == 0)
10881 return elfcore_write_aarch_hw_break (abfd, buf, bufsiz, data, size);
10882 if (strcmp (section, ".reg-aarch-hw-watch") == 0)
10883 return elfcore_write_aarch_hw_watch (abfd, buf, bufsiz, data, size);
10888 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
10893 while (p < buf + size)
10895 /* FIXME: bad alignment assumption. */
10896 Elf_External_Note *xnp = (Elf_External_Note *) p;
10897 Elf_Internal_Note in;
10899 if (offsetof (Elf_External_Note, name) > buf - p + size)
10902 in.type = H_GET_32 (abfd, xnp->type);
10904 in.namesz = H_GET_32 (abfd, xnp->namesz);
10905 in.namedata = xnp->name;
10906 if (in.namesz > buf - in.namedata + size)
10909 in.descsz = H_GET_32 (abfd, xnp->descsz);
10910 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
10911 in.descpos = offset + (in.descdata - buf);
10913 && (in.descdata >= buf + size
10914 || in.descsz > buf - in.descdata + size))
10917 switch (bfd_get_format (abfd))
10924 #define GROKER_ELEMENT(S,F) {S, sizeof (S) - 1, F}
10927 const char * string;
10929 bfd_boolean (* func)(bfd *, Elf_Internal_Note *);
10933 GROKER_ELEMENT ("", elfcore_grok_note),
10934 GROKER_ELEMENT ("FreeBSD", elfcore_grok_freebsd_note),
10935 GROKER_ELEMENT ("NetBSD-CORE", elfcore_grok_netbsd_note),
10936 GROKER_ELEMENT ( "OpenBSD", elfcore_grok_openbsd_note),
10937 GROKER_ELEMENT ("QNX", elfcore_grok_nto_note),
10938 GROKER_ELEMENT ("SPU/", elfcore_grok_spu_note)
10940 #undef GROKER_ELEMENT
10943 for (i = ARRAY_SIZE (grokers); i--;)
10945 if (in.namesz >= grokers[i].len
10946 && strncmp (in.namedata, grokers[i].string,
10947 grokers[i].len) == 0)
10949 if (! grokers[i].func (abfd, & in))
10958 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
10960 if (! elfobj_grok_gnu_note (abfd, &in))
10963 else if (in.namesz == sizeof "stapsdt"
10964 && strcmp (in.namedata, "stapsdt") == 0)
10966 if (! elfobj_grok_stapsdt_note (abfd, &in))
10972 p = in.descdata + BFD_ALIGN (in.descsz, 4);
10979 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
10986 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
10989 buf = (char *) bfd_malloc (size + 1);
10993 /* PR 17512: file: ec08f814
10994 0-termintate the buffer so that string searches will not overflow. */
10997 if (bfd_bread (buf, size, abfd) != size
10998 || !elf_parse_notes (abfd, buf, size, offset))
11008 /* Providing external access to the ELF program header table. */
11010 /* Return an upper bound on the number of bytes required to store a
11011 copy of ABFD's program header table entries. Return -1 if an error
11012 occurs; bfd_get_error will return an appropriate code. */
11015 bfd_get_elf_phdr_upper_bound (bfd *abfd)
11017 if (abfd->xvec->flavour != bfd_target_elf_flavour)
11019 bfd_set_error (bfd_error_wrong_format);
11023 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
11026 /* Copy ABFD's program header table entries to *PHDRS. The entries
11027 will be stored as an array of Elf_Internal_Phdr structures, as
11028 defined in include/elf/internal.h. To find out how large the
11029 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
11031 Return the number of program header table entries read, or -1 if an
11032 error occurs; bfd_get_error will return an appropriate code. */
11035 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
11039 if (abfd->xvec->flavour != bfd_target_elf_flavour)
11041 bfd_set_error (bfd_error_wrong_format);
11045 num_phdrs = elf_elfheader (abfd)->e_phnum;
11046 memcpy (phdrs, elf_tdata (abfd)->phdr,
11047 num_phdrs * sizeof (Elf_Internal_Phdr));
11052 enum elf_reloc_type_class
11053 _bfd_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
11054 const asection *rel_sec ATTRIBUTE_UNUSED,
11055 const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
11057 return reloc_class_normal;
11060 /* For RELA architectures, return the relocation value for a
11061 relocation against a local symbol. */
11064 _bfd_elf_rela_local_sym (bfd *abfd,
11065 Elf_Internal_Sym *sym,
11067 Elf_Internal_Rela *rel)
11069 asection *sec = *psec;
11070 bfd_vma relocation;
11072 relocation = (sec->output_section->vma
11073 + sec->output_offset
11075 if ((sec->flags & SEC_MERGE)
11076 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
11077 && sec->sec_info_type == SEC_INFO_TYPE_MERGE)
11080 _bfd_merged_section_offset (abfd, psec,
11081 elf_section_data (sec)->sec_info,
11082 sym->st_value + rel->r_addend);
11085 /* If we have changed the section, and our original section is
11086 marked with SEC_EXCLUDE, it means that the original
11087 SEC_MERGE section has been completely subsumed in some
11088 other SEC_MERGE section. In this case, we need to leave
11089 some info around for --emit-relocs. */
11090 if ((sec->flags & SEC_EXCLUDE) != 0)
11091 sec->kept_section = *psec;
11094 rel->r_addend -= relocation;
11095 rel->r_addend += sec->output_section->vma + sec->output_offset;
11101 _bfd_elf_rel_local_sym (bfd *abfd,
11102 Elf_Internal_Sym *sym,
11106 asection *sec = *psec;
11108 if (sec->sec_info_type != SEC_INFO_TYPE_MERGE)
11109 return sym->st_value + addend;
11111 return _bfd_merged_section_offset (abfd, psec,
11112 elf_section_data (sec)->sec_info,
11113 sym->st_value + addend);
11116 /* Adjust an address within a section. Given OFFSET within SEC, return
11117 the new offset within the section, based upon changes made to the
11118 section. Returns -1 if the offset is now invalid.
11119 The offset (in abnd out) is in target sized bytes, however big a
11123 _bfd_elf_section_offset (bfd *abfd,
11124 struct bfd_link_info *info,
11128 switch (sec->sec_info_type)
11130 case SEC_INFO_TYPE_STABS:
11131 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
11133 case SEC_INFO_TYPE_EH_FRAME:
11134 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
11137 if ((sec->flags & SEC_ELF_REVERSE_COPY) != 0)
11139 /* Reverse the offset. */
11140 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
11141 bfd_size_type address_size = bed->s->arch_size / 8;
11143 /* address_size and sec->size are in octets. Convert
11144 to bytes before subtracting the original offset. */
11145 offset = (sec->size - address_size) / bfd_octets_per_byte (abfd) - offset;
11151 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
11152 reconstruct an ELF file by reading the segments out of remote memory
11153 based on the ELF file header at EHDR_VMA and the ELF program headers it
11154 points to. If not null, *LOADBASEP is filled in with the difference
11155 between the VMAs from which the segments were read, and the VMAs the
11156 file headers (and hence BFD's idea of each section's VMA) put them at.
11158 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
11159 remote memory at target address VMA into the local buffer at MYADDR; it
11160 should return zero on success or an `errno' code on failure. TEMPL must
11161 be a BFD for an ELF target with the word size and byte order found in
11162 the remote memory. */
11165 bfd_elf_bfd_from_remote_memory
11168 bfd_size_type size,
11169 bfd_vma *loadbasep,
11170 int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type))
11172 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
11173 (templ, ehdr_vma, size, loadbasep, target_read_memory);
11177 _bfd_elf_get_synthetic_symtab (bfd *abfd,
11178 long symcount ATTRIBUTE_UNUSED,
11179 asymbol **syms ATTRIBUTE_UNUSED,
11184 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
11187 const char *relplt_name;
11188 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
11192 Elf_Internal_Shdr *hdr;
11198 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
11201 if (dynsymcount <= 0)
11204 if (!bed->plt_sym_val)
11207 relplt_name = bed->relplt_name;
11208 if (relplt_name == NULL)
11209 relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt";
11210 relplt = bfd_get_section_by_name (abfd, relplt_name);
11211 if (relplt == NULL)
11214 hdr = &elf_section_data (relplt)->this_hdr;
11215 if (hdr->sh_link != elf_dynsymtab (abfd)
11216 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
11219 plt = bfd_get_section_by_name (abfd, ".plt");
11223 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
11224 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
11227 count = relplt->size / hdr->sh_entsize;
11228 size = count * sizeof (asymbol);
11229 p = relplt->relocation;
11230 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
11232 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
11233 if (p->addend != 0)
11236 size += sizeof ("+0x") - 1 + 8 + 8 * (bed->s->elfclass == ELFCLASS64);
11238 size += sizeof ("+0x") - 1 + 8;
11243 s = *ret = (asymbol *) bfd_malloc (size);
11247 names = (char *) (s + count);
11248 p = relplt->relocation;
11250 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
11255 addr = bed->plt_sym_val (i, plt, p);
11256 if (addr == (bfd_vma) -1)
11259 *s = **p->sym_ptr_ptr;
11260 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
11261 we are defining a symbol, ensure one of them is set. */
11262 if ((s->flags & BSF_LOCAL) == 0)
11263 s->flags |= BSF_GLOBAL;
11264 s->flags |= BSF_SYNTHETIC;
11266 s->value = addr - plt->vma;
11269 len = strlen ((*p->sym_ptr_ptr)->name);
11270 memcpy (names, (*p->sym_ptr_ptr)->name, len);
11272 if (p->addend != 0)
11276 memcpy (names, "+0x", sizeof ("+0x") - 1);
11277 names += sizeof ("+0x") - 1;
11278 bfd_sprintf_vma (abfd, buf, p->addend);
11279 for (a = buf; *a == '0'; ++a)
11282 memcpy (names, a, len);
11285 memcpy (names, "@plt", sizeof ("@plt"));
11286 names += sizeof ("@plt");
11293 /* It is only used by x86-64 so far.
11294 ??? This repeats *COM* id of zero. sec->id is supposed to be unique,
11295 but current usage would allow all of _bfd_std_section to be zero. */
11296 static const asymbol lcomm_sym
11297 = GLOBAL_SYM_INIT ("LARGE_COMMON", &_bfd_elf_large_com_section);
11298 asection _bfd_elf_large_com_section
11299 = BFD_FAKE_SECTION (_bfd_elf_large_com_section, &lcomm_sym,
11300 "LARGE_COMMON", 0, SEC_IS_COMMON);
11303 _bfd_elf_post_process_headers (bfd * abfd,
11304 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
11306 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
11308 i_ehdrp = elf_elfheader (abfd);
11310 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
11312 /* To make things simpler for the loader on Linux systems we set the
11313 osabi field to ELFOSABI_GNU if the binary contains symbols of
11314 the STT_GNU_IFUNC type or STB_GNU_UNIQUE binding. */
11315 if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE
11316 && elf_tdata (abfd)->has_gnu_symbols)
11317 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_GNU;
11321 /* Return TRUE for ELF symbol types that represent functions.
11322 This is the default version of this function, which is sufficient for
11323 most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */
11326 _bfd_elf_is_function_type (unsigned int type)
11328 return (type == STT_FUNC
11329 || type == STT_GNU_IFUNC);
11332 /* If the ELF symbol SYM might be a function in SEC, return the
11333 function size and set *CODE_OFF to the function's entry point,
11334 otherwise return zero. */
11337 _bfd_elf_maybe_function_sym (const asymbol *sym, asection *sec,
11340 bfd_size_type size;
11342 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
11343 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0
11344 || sym->section != sec)
11347 *code_off = sym->value;
11349 if (!(sym->flags & BSF_SYNTHETIC))
11350 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;