1 /* ELF executable support for BFD.
3 Copyright (C) 1993-2015 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-psinfo.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 bfd_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 _bfd_error_handler (_("%B: attempt to load strings from a non-string section (number %d)"),
346 if (bfd_elf_get_str_section (abfd, shindex) == NULL)
350 if (strindex >= hdr->sh_size)
352 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
353 (*_bfd_error_handler)
354 (_("%B: invalid string offset %u >= %lu for section `%s'"),
355 abfd, strindex, (unsigned long) hdr->sh_size,
356 (shindex == shstrndx && strindex == hdr->sh_name
358 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
362 return ((char *) hdr->contents) + strindex;
365 /* Read and convert symbols to internal format.
366 SYMCOUNT specifies the number of symbols to read, starting from
367 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
368 are non-NULL, they are used to store the internal symbols, external
369 symbols, and symbol section index extensions, respectively.
370 Returns a pointer to the internal symbol buffer (malloced if necessary)
371 or NULL if there were no symbols or some kind of problem. */
374 bfd_elf_get_elf_syms (bfd *ibfd,
375 Elf_Internal_Shdr *symtab_hdr,
378 Elf_Internal_Sym *intsym_buf,
380 Elf_External_Sym_Shndx *extshndx_buf)
382 Elf_Internal_Shdr *shndx_hdr;
384 const bfd_byte *esym;
385 Elf_External_Sym_Shndx *alloc_extshndx;
386 Elf_External_Sym_Shndx *shndx;
387 Elf_Internal_Sym *alloc_intsym;
388 Elf_Internal_Sym *isym;
389 Elf_Internal_Sym *isymend;
390 const struct elf_backend_data *bed;
395 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
401 /* Normal syms might have section extension entries. */
403 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
404 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
406 /* Read the symbols. */
408 alloc_extshndx = NULL;
410 bed = get_elf_backend_data (ibfd);
411 extsym_size = bed->s->sizeof_sym;
412 amt = symcount * extsym_size;
413 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
414 if (extsym_buf == NULL)
416 alloc_ext = bfd_malloc2 (symcount, extsym_size);
417 extsym_buf = alloc_ext;
419 if (extsym_buf == NULL
420 || bfd_seek (ibfd, pos, SEEK_SET) != 0
421 || bfd_bread (extsym_buf, amt, ibfd) != amt)
427 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
431 amt = symcount * sizeof (Elf_External_Sym_Shndx);
432 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
433 if (extshndx_buf == NULL)
435 alloc_extshndx = (Elf_External_Sym_Shndx *)
436 bfd_malloc2 (symcount, sizeof (Elf_External_Sym_Shndx));
437 extshndx_buf = alloc_extshndx;
439 if (extshndx_buf == NULL
440 || bfd_seek (ibfd, pos, SEEK_SET) != 0
441 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
448 if (intsym_buf == NULL)
450 alloc_intsym = (Elf_Internal_Sym *)
451 bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
452 intsym_buf = alloc_intsym;
453 if (intsym_buf == NULL)
457 /* Convert the symbols to internal form. */
458 isymend = intsym_buf + symcount;
459 for (esym = (const bfd_byte *) extsym_buf, isym = intsym_buf,
460 shndx = extshndx_buf;
462 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
463 if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym))
465 symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size;
466 (*_bfd_error_handler) (_("%B symbol number %lu references "
467 "nonexistent SHT_SYMTAB_SHNDX section"),
468 ibfd, (unsigned long) symoffset);
469 if (alloc_intsym != NULL)
476 if (alloc_ext != NULL)
478 if (alloc_extshndx != NULL)
479 free (alloc_extshndx);
484 /* Look up a symbol name. */
486 bfd_elf_sym_name (bfd *abfd,
487 Elf_Internal_Shdr *symtab_hdr,
488 Elf_Internal_Sym *isym,
492 unsigned int iname = isym->st_name;
493 unsigned int shindex = symtab_hdr->sh_link;
495 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
496 /* Check for a bogus st_shndx to avoid crashing. */
497 && isym->st_shndx < elf_numsections (abfd))
499 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
500 shindex = elf_elfheader (abfd)->e_shstrndx;
503 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
506 else if (sym_sec && *name == '\0')
507 name = bfd_section_name (abfd, sym_sec);
512 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
513 sections. The first element is the flags, the rest are section
516 typedef union elf_internal_group {
517 Elf_Internal_Shdr *shdr;
519 } Elf_Internal_Group;
521 /* Return the name of the group signature symbol. Why isn't the
522 signature just a string? */
525 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
527 Elf_Internal_Shdr *hdr;
528 unsigned char esym[sizeof (Elf64_External_Sym)];
529 Elf_External_Sym_Shndx eshndx;
530 Elf_Internal_Sym isym;
532 /* First we need to ensure the symbol table is available. Make sure
533 that it is a symbol table section. */
534 if (ghdr->sh_link >= elf_numsections (abfd))
536 hdr = elf_elfsections (abfd) [ghdr->sh_link];
537 if (hdr->sh_type != SHT_SYMTAB
538 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
541 /* Go read the symbol. */
542 hdr = &elf_tdata (abfd)->symtab_hdr;
543 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
544 &isym, esym, &eshndx) == NULL)
547 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
550 /* Set next_in_group list pointer, and group name for NEWSECT. */
553 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
555 unsigned int num_group = elf_tdata (abfd)->num_group;
557 /* If num_group is zero, read in all SHT_GROUP sections. The count
558 is set to -1 if there are no SHT_GROUP sections. */
561 unsigned int i, shnum;
563 /* First count the number of groups. If we have a SHT_GROUP
564 section with just a flag word (ie. sh_size is 4), ignore it. */
565 shnum = elf_numsections (abfd);
568 #define IS_VALID_GROUP_SECTION_HEADER(shdr, minsize) \
569 ( (shdr)->sh_type == SHT_GROUP \
570 && (shdr)->sh_size >= minsize \
571 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
572 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
574 for (i = 0; i < shnum; i++)
576 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
578 if (IS_VALID_GROUP_SECTION_HEADER (shdr, 2 * GRP_ENTRY_SIZE))
584 num_group = (unsigned) -1;
585 elf_tdata (abfd)->num_group = num_group;
589 /* We keep a list of elf section headers for group sections,
590 so we can find them quickly. */
593 elf_tdata (abfd)->num_group = num_group;
594 elf_tdata (abfd)->group_sect_ptr = (Elf_Internal_Shdr **)
595 bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
596 if (elf_tdata (abfd)->group_sect_ptr == NULL)
600 for (i = 0; i < shnum; i++)
602 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
604 if (IS_VALID_GROUP_SECTION_HEADER (shdr, 2 * GRP_ENTRY_SIZE))
607 Elf_Internal_Group *dest;
609 /* Add to list of sections. */
610 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
613 /* Read the raw contents. */
614 BFD_ASSERT (sizeof (*dest) >= 4);
615 amt = shdr->sh_size * sizeof (*dest) / 4;
616 shdr->contents = (unsigned char *)
617 bfd_alloc2 (abfd, shdr->sh_size, sizeof (*dest) / 4);
618 /* PR binutils/4110: Handle corrupt group headers. */
619 if (shdr->contents == NULL)
622 (_("%B: corrupt size field in group section header: 0x%lx"), abfd, shdr->sh_size);
623 bfd_set_error (bfd_error_bad_value);
628 memset (shdr->contents, 0, amt);
630 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
631 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
635 (_("%B: invalid size field in group section header: 0x%lx"), abfd, shdr->sh_size);
636 bfd_set_error (bfd_error_bad_value);
638 /* PR 17510: If the group contents are even partially
639 corrupt, do not allow any of the contents to be used. */
640 memset (shdr->contents, 0, amt);
644 /* Translate raw contents, a flag word followed by an
645 array of elf section indices all in target byte order,
646 to the flag word followed by an array of elf section
648 src = shdr->contents + shdr->sh_size;
649 dest = (Elf_Internal_Group *) (shdr->contents + amt);
657 idx = H_GET_32 (abfd, src);
658 if (src == shdr->contents)
661 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
662 shdr->bfd_section->flags
663 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
668 ((*_bfd_error_handler)
669 (_("%B: invalid SHT_GROUP entry"), abfd));
672 dest->shdr = elf_elfsections (abfd)[idx];
677 /* PR 17510: Corrupt binaries might contain invalid groups. */
678 if (num_group != (unsigned) elf_tdata (abfd)->num_group)
680 elf_tdata (abfd)->num_group = num_group;
682 /* If all groups are invalid then fail. */
685 elf_tdata (abfd)->group_sect_ptr = NULL;
686 elf_tdata (abfd)->num_group = num_group = -1;
687 (*_bfd_error_handler) (_("%B: no valid group sections found"), abfd);
688 bfd_set_error (bfd_error_bad_value);
694 if (num_group != (unsigned) -1)
698 for (i = 0; i < num_group; i++)
700 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
701 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
702 unsigned int n_elt = shdr->sh_size / 4;
704 /* Look through this group's sections to see if current
705 section is a member. */
707 if ((++idx)->shdr == hdr)
711 /* We are a member of this group. Go looking through
712 other members to see if any others are linked via
714 idx = (Elf_Internal_Group *) shdr->contents;
715 n_elt = shdr->sh_size / 4;
717 if ((s = (++idx)->shdr->bfd_section) != NULL
718 && elf_next_in_group (s) != NULL)
722 /* Snarf the group name from other member, and
723 insert current section in circular list. */
724 elf_group_name (newsect) = elf_group_name (s);
725 elf_next_in_group (newsect) = elf_next_in_group (s);
726 elf_next_in_group (s) = newsect;
732 gname = group_signature (abfd, shdr);
735 elf_group_name (newsect) = gname;
737 /* Start a circular list with one element. */
738 elf_next_in_group (newsect) = newsect;
741 /* If the group section has been created, point to the
743 if (shdr->bfd_section != NULL)
744 elf_next_in_group (shdr->bfd_section) = newsect;
752 if (elf_group_name (newsect) == NULL)
754 (*_bfd_error_handler) (_("%B: no group info for section %A"),
762 _bfd_elf_setup_sections (bfd *abfd)
765 unsigned int num_group = elf_tdata (abfd)->num_group;
766 bfd_boolean result = TRUE;
769 /* Process SHF_LINK_ORDER. */
770 for (s = abfd->sections; s != NULL; s = s->next)
772 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
773 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
775 unsigned int elfsec = this_hdr->sh_link;
776 /* FIXME: The old Intel compiler and old strip/objcopy may
777 not set the sh_link or sh_info fields. Hence we could
778 get the situation where elfsec is 0. */
781 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
782 if (bed->link_order_error_handler)
783 bed->link_order_error_handler
784 (_("%B: warning: sh_link not set for section `%A'"),
789 asection *linksec = NULL;
791 if (elfsec < elf_numsections (abfd))
793 this_hdr = elf_elfsections (abfd)[elfsec];
794 linksec = this_hdr->bfd_section;
798 Some strip/objcopy may leave an incorrect value in
799 sh_link. We don't want to proceed. */
802 (*_bfd_error_handler)
803 (_("%B: sh_link [%d] in section `%A' is incorrect"),
804 s->owner, s, elfsec);
808 elf_linked_to_section (s) = linksec;
813 /* Process section groups. */
814 if (num_group == (unsigned) -1)
817 for (i = 0; i < num_group; i++)
819 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
820 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
821 unsigned int n_elt = shdr->sh_size / 4;
824 if ((++idx)->shdr->bfd_section)
825 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
826 else if (idx->shdr->sh_type == SHT_RELA
827 || idx->shdr->sh_type == SHT_REL)
828 /* We won't include relocation sections in section groups in
829 output object files. We adjust the group section size here
830 so that relocatable link will work correctly when
831 relocation sections are in section group in input object
833 shdr->bfd_section->size -= 4;
836 /* There are some unknown sections in the group. */
837 (*_bfd_error_handler)
838 (_("%B: unknown [%d] section `%s' in group [%s]"),
840 (unsigned int) idx->shdr->sh_type,
841 bfd_elf_string_from_elf_section (abfd,
842 (elf_elfheader (abfd)
845 shdr->bfd_section->name);
853 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
855 return elf_next_in_group (sec) != NULL;
858 /* Make a BFD section from an ELF section. We store a pointer to the
859 BFD section in the bfd_section field of the header. */
862 _bfd_elf_make_section_from_shdr (bfd *abfd,
863 Elf_Internal_Shdr *hdr,
869 const struct elf_backend_data *bed;
871 if (hdr->bfd_section != NULL)
874 newsect = bfd_make_section_anyway (abfd, name);
878 hdr->bfd_section = newsect;
879 elf_section_data (newsect)->this_hdr = *hdr;
880 elf_section_data (newsect)->this_idx = shindex;
882 /* Always use the real type/flags. */
883 elf_section_type (newsect) = hdr->sh_type;
884 elf_section_flags (newsect) = hdr->sh_flags;
886 newsect->filepos = hdr->sh_offset;
888 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
889 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
890 || ! bfd_set_section_alignment (abfd, newsect,
891 bfd_log2 (hdr->sh_addralign)))
894 flags = SEC_NO_FLAGS;
895 if (hdr->sh_type != SHT_NOBITS)
896 flags |= SEC_HAS_CONTENTS;
897 if (hdr->sh_type == SHT_GROUP)
898 flags |= SEC_GROUP | SEC_EXCLUDE;
899 if ((hdr->sh_flags & SHF_ALLOC) != 0)
902 if (hdr->sh_type != SHT_NOBITS)
905 if ((hdr->sh_flags & SHF_WRITE) == 0)
906 flags |= SEC_READONLY;
907 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
909 else if ((flags & SEC_LOAD) != 0)
911 if ((hdr->sh_flags & SHF_MERGE) != 0)
914 newsect->entsize = hdr->sh_entsize;
915 if ((hdr->sh_flags & SHF_STRINGS) != 0)
916 flags |= SEC_STRINGS;
918 if (hdr->sh_flags & SHF_GROUP)
919 if (!setup_group (abfd, hdr, newsect))
921 if ((hdr->sh_flags & SHF_TLS) != 0)
922 flags |= SEC_THREAD_LOCAL;
923 if ((hdr->sh_flags & SHF_EXCLUDE) != 0)
924 flags |= SEC_EXCLUDE;
926 if ((flags & SEC_ALLOC) == 0)
928 /* The debugging sections appear to be recognized only by name,
929 not any sort of flag. Their SEC_ALLOC bits are cleared. */
936 else if (name[1] == 'g' && name[2] == 'n')
937 p = ".gnu.linkonce.wi.", n = 17;
938 else if (name[1] == 'g' && name[2] == 'd')
939 p = ".gdb_index", n = 11; /* yes we really do mean 11. */
940 else if (name[1] == 'l')
942 else if (name[1] == 's')
944 else if (name[1] == 'z')
945 p = ".zdebug", n = 7;
948 if (p != NULL && strncmp (name, p, n) == 0)
949 flags |= SEC_DEBUGGING;
953 /* As a GNU extension, if the name begins with .gnu.linkonce, we
954 only link a single copy of the section. This is used to support
955 g++. g++ will emit each template expansion in its own section.
956 The symbols will be defined as weak, so that multiple definitions
957 are permitted. The GNU linker extension is to actually discard
958 all but one of the sections. */
959 if (CONST_STRNEQ (name, ".gnu.linkonce")
960 && elf_next_in_group (newsect) == NULL)
961 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
963 bed = get_elf_backend_data (abfd);
964 if (bed->elf_backend_section_flags)
965 if (! bed->elf_backend_section_flags (&flags, hdr))
968 if (! bfd_set_section_flags (abfd, newsect, flags))
971 /* We do not parse the PT_NOTE segments as we are interested even in the
972 separate debug info files which may have the segments offsets corrupted.
973 PT_NOTEs from the core files are currently not parsed using BFD. */
974 if (hdr->sh_type == SHT_NOTE)
978 if (!bfd_malloc_and_get_section (abfd, newsect, &contents))
981 elf_parse_notes (abfd, (char *) contents, hdr->sh_size, -1);
985 if ((flags & SEC_ALLOC) != 0)
987 Elf_Internal_Phdr *phdr;
988 unsigned int i, nload;
990 /* Some ELF linkers produce binaries with all the program header
991 p_paddr fields zero. If we have such a binary with more than
992 one PT_LOAD header, then leave the section lma equal to vma
993 so that we don't create sections with overlapping lma. */
994 phdr = elf_tdata (abfd)->phdr;
995 for (nload = 0, i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
996 if (phdr->p_paddr != 0)
998 else if (phdr->p_type == PT_LOAD && phdr->p_memsz != 0)
1000 if (i >= elf_elfheader (abfd)->e_phnum && nload > 1)
1003 phdr = elf_tdata (abfd)->phdr;
1004 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
1006 if (((phdr->p_type == PT_LOAD
1007 && (hdr->sh_flags & SHF_TLS) == 0)
1008 || phdr->p_type == PT_TLS)
1009 && ELF_SECTION_IN_SEGMENT (hdr, phdr))
1011 if ((flags & SEC_LOAD) == 0)
1012 newsect->lma = (phdr->p_paddr
1013 + hdr->sh_addr - phdr->p_vaddr);
1015 /* We used to use the same adjustment for SEC_LOAD
1016 sections, but that doesn't work if the segment
1017 is packed with code from multiple VMAs.
1018 Instead we calculate the section LMA based on
1019 the segment LMA. It is assumed that the
1020 segment will contain sections with contiguous
1021 LMAs, even if the VMAs are not. */
1022 newsect->lma = (phdr->p_paddr
1023 + hdr->sh_offset - phdr->p_offset);
1025 /* With contiguous segments, we can't tell from file
1026 offsets whether a section with zero size should
1027 be placed at the end of one segment or the
1028 beginning of the next. Decide based on vaddr. */
1029 if (hdr->sh_addr >= phdr->p_vaddr
1030 && (hdr->sh_addr + hdr->sh_size
1031 <= phdr->p_vaddr + phdr->p_memsz))
1037 /* Compress/decompress DWARF debug sections with names: .debug_* and
1038 .zdebug_*, after the section flags is set. */
1039 if ((flags & SEC_DEBUGGING)
1040 && ((name[1] == 'd' && name[6] == '_')
1041 || (name[1] == 'z' && name[7] == '_')))
1043 enum { nothing, compress, decompress } action = nothing;
1046 if (bfd_is_section_compressed (abfd, newsect))
1048 /* Compressed section. Check if we should decompress. */
1049 if ((abfd->flags & BFD_DECOMPRESS))
1050 action = decompress;
1054 /* Normal section. Check if we should compress. */
1055 if ((abfd->flags & BFD_COMPRESS) && newsect->size != 0)
1065 if (!bfd_init_section_compress_status (abfd, newsect))
1067 (*_bfd_error_handler)
1068 (_("%B: unable to initialize compress status for section %s"),
1074 unsigned int len = strlen (name);
1076 new_name = bfd_alloc (abfd, len + 2);
1077 if (new_name == NULL)
1081 memcpy (new_name + 2, name + 1, len);
1085 if (!bfd_init_section_decompress_status (abfd, newsect))
1087 (*_bfd_error_handler)
1088 (_("%B: unable to initialize decompress status for section %s"),
1094 unsigned int len = strlen (name);
1096 new_name = bfd_alloc (abfd, len);
1097 if (new_name == NULL)
1100 memcpy (new_name + 1, name + 2, len - 1);
1104 if (new_name != NULL)
1105 bfd_rename_section (abfd, newsect, new_name);
1111 const char *const bfd_elf_section_type_names[] = {
1112 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1113 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1114 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1117 /* ELF relocs are against symbols. If we are producing relocatable
1118 output, and the reloc is against an external symbol, and nothing
1119 has given us any additional addend, the resulting reloc will also
1120 be against the same symbol. In such a case, we don't want to
1121 change anything about the way the reloc is handled, since it will
1122 all be done at final link time. Rather than put special case code
1123 into bfd_perform_relocation, all the reloc types use this howto
1124 function. It just short circuits the reloc if producing
1125 relocatable output against an external symbol. */
1127 bfd_reloc_status_type
1128 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1129 arelent *reloc_entry,
1131 void *data ATTRIBUTE_UNUSED,
1132 asection *input_section,
1134 char **error_message ATTRIBUTE_UNUSED)
1136 if (output_bfd != NULL
1137 && (symbol->flags & BSF_SECTION_SYM) == 0
1138 && (! reloc_entry->howto->partial_inplace
1139 || reloc_entry->addend == 0))
1141 reloc_entry->address += input_section->output_offset;
1142 return bfd_reloc_ok;
1145 return bfd_reloc_continue;
1148 /* Copy the program header and other data from one object module to
1152 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1154 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1155 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1158 if (!elf_flags_init (obfd))
1160 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1161 elf_flags_init (obfd) = TRUE;
1164 elf_gp (obfd) = elf_gp (ibfd);
1166 /* Also copy the EI_OSABI field. */
1167 elf_elfheader (obfd)->e_ident[EI_OSABI] =
1168 elf_elfheader (ibfd)->e_ident[EI_OSABI];
1170 /* Copy object attributes. */
1171 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1176 get_segment_type (unsigned int p_type)
1181 case PT_NULL: pt = "NULL"; break;
1182 case PT_LOAD: pt = "LOAD"; break;
1183 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1184 case PT_INTERP: pt = "INTERP"; break;
1185 case PT_NOTE: pt = "NOTE"; break;
1186 case PT_SHLIB: pt = "SHLIB"; break;
1187 case PT_PHDR: pt = "PHDR"; break;
1188 case PT_TLS: pt = "TLS"; break;
1189 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1190 case PT_GNU_STACK: pt = "STACK"; break;
1191 case PT_GNU_RELRO: pt = "RELRO"; break;
1192 default: pt = NULL; break;
1197 /* Print out the program headers. */
1200 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1202 FILE *f = (FILE *) farg;
1203 Elf_Internal_Phdr *p;
1205 bfd_byte *dynbuf = NULL;
1207 p = elf_tdata (abfd)->phdr;
1212 fprintf (f, _("\nProgram Header:\n"));
1213 c = elf_elfheader (abfd)->e_phnum;
1214 for (i = 0; i < c; i++, p++)
1216 const char *pt = get_segment_type (p->p_type);
1221 sprintf (buf, "0x%lx", p->p_type);
1224 fprintf (f, "%8s off 0x", pt);
1225 bfd_fprintf_vma (abfd, f, p->p_offset);
1226 fprintf (f, " vaddr 0x");
1227 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1228 fprintf (f, " paddr 0x");
1229 bfd_fprintf_vma (abfd, f, p->p_paddr);
1230 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1231 fprintf (f, " filesz 0x");
1232 bfd_fprintf_vma (abfd, f, p->p_filesz);
1233 fprintf (f, " memsz 0x");
1234 bfd_fprintf_vma (abfd, f, p->p_memsz);
1235 fprintf (f, " flags %c%c%c",
1236 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1237 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1238 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1239 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1240 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1245 s = bfd_get_section_by_name (abfd, ".dynamic");
1248 unsigned int elfsec;
1249 unsigned long shlink;
1250 bfd_byte *extdyn, *extdynend;
1252 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1254 fprintf (f, _("\nDynamic Section:\n"));
1256 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1259 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1260 if (elfsec == SHN_BAD)
1262 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1264 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1265 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1268 /* PR 17512: file: 6f427532. */
1269 if (s->size < extdynsize)
1271 extdynend = extdyn + s->size;
1272 /* PR 17512: file: id:000006,sig:06,src:000000,op:flip4,pos:5664.
1274 for (; extdyn <= (extdynend - extdynsize); extdyn += extdynsize)
1276 Elf_Internal_Dyn dyn;
1277 const char *name = "";
1279 bfd_boolean stringp;
1280 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1282 (*swap_dyn_in) (abfd, extdyn, &dyn);
1284 if (dyn.d_tag == DT_NULL)
1291 if (bed->elf_backend_get_target_dtag)
1292 name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag);
1294 if (!strcmp (name, ""))
1296 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1301 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1302 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1303 case DT_PLTGOT: name = "PLTGOT"; break;
1304 case DT_HASH: name = "HASH"; break;
1305 case DT_STRTAB: name = "STRTAB"; break;
1306 case DT_SYMTAB: name = "SYMTAB"; break;
1307 case DT_RELA: name = "RELA"; break;
1308 case DT_RELASZ: name = "RELASZ"; break;
1309 case DT_RELAENT: name = "RELAENT"; break;
1310 case DT_STRSZ: name = "STRSZ"; break;
1311 case DT_SYMENT: name = "SYMENT"; break;
1312 case DT_INIT: name = "INIT"; break;
1313 case DT_FINI: name = "FINI"; break;
1314 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1315 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1316 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1317 case DT_REL: name = "REL"; break;
1318 case DT_RELSZ: name = "RELSZ"; break;
1319 case DT_RELENT: name = "RELENT"; break;
1320 case DT_PLTREL: name = "PLTREL"; break;
1321 case DT_DEBUG: name = "DEBUG"; break;
1322 case DT_TEXTREL: name = "TEXTREL"; break;
1323 case DT_JMPREL: name = "JMPREL"; break;
1324 case DT_BIND_NOW: name = "BIND_NOW"; break;
1325 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1326 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1327 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1328 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1329 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1330 case DT_FLAGS: name = "FLAGS"; break;
1331 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1332 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1333 case DT_CHECKSUM: name = "CHECKSUM"; break;
1334 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1335 case DT_MOVEENT: name = "MOVEENT"; break;
1336 case DT_MOVESZ: name = "MOVESZ"; break;
1337 case DT_FEATURE: name = "FEATURE"; break;
1338 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1339 case DT_SYMINSZ: name = "SYMINSZ"; break;
1340 case DT_SYMINENT: name = "SYMINENT"; break;
1341 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1342 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1343 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1344 case DT_PLTPAD: name = "PLTPAD"; break;
1345 case DT_MOVETAB: name = "MOVETAB"; break;
1346 case DT_SYMINFO: name = "SYMINFO"; break;
1347 case DT_RELACOUNT: name = "RELACOUNT"; break;
1348 case DT_RELCOUNT: name = "RELCOUNT"; break;
1349 case DT_FLAGS_1: name = "FLAGS_1"; break;
1350 case DT_VERSYM: name = "VERSYM"; break;
1351 case DT_VERDEF: name = "VERDEF"; break;
1352 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1353 case DT_VERNEED: name = "VERNEED"; break;
1354 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1355 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1356 case DT_USED: name = "USED"; break;
1357 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1358 case DT_GNU_HASH: name = "GNU_HASH"; break;
1361 fprintf (f, " %-20s ", name);
1365 bfd_fprintf_vma (abfd, f, dyn.d_un.d_val);
1370 unsigned int tagv = dyn.d_un.d_val;
1372 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1375 fprintf (f, "%s", string);
1384 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1385 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1387 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1391 if (elf_dynverdef (abfd) != 0)
1393 Elf_Internal_Verdef *t;
1395 fprintf (f, _("\nVersion definitions:\n"));
1396 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1398 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1399 t->vd_flags, t->vd_hash,
1400 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1401 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1403 Elf_Internal_Verdaux *a;
1406 for (a = t->vd_auxptr->vda_nextptr;
1410 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1416 if (elf_dynverref (abfd) != 0)
1418 Elf_Internal_Verneed *t;
1420 fprintf (f, _("\nVersion References:\n"));
1421 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1423 Elf_Internal_Vernaux *a;
1425 fprintf (f, _(" required from %s:\n"),
1426 t->vn_filename ? t->vn_filename : "<corrupt>");
1427 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1428 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1429 a->vna_flags, a->vna_other,
1430 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1442 /* Get version string. */
1445 _bfd_elf_get_symbol_version_string (bfd *abfd, asymbol *symbol,
1446 bfd_boolean *hidden)
1448 const char *version_string = NULL;
1449 if (elf_dynversym (abfd) != 0
1450 && (elf_dynverdef (abfd) != 0 || elf_dynverref (abfd) != 0))
1452 unsigned int vernum = ((elf_symbol_type *) symbol)->version;
1454 *hidden = (vernum & VERSYM_HIDDEN) != 0;
1455 vernum &= VERSYM_VERSION;
1458 version_string = "";
1459 else if (vernum == 1)
1460 version_string = "Base";
1461 else if (vernum <= elf_tdata (abfd)->cverdefs)
1463 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1466 Elf_Internal_Verneed *t;
1468 version_string = "";
1469 for (t = elf_tdata (abfd)->verref;
1473 Elf_Internal_Vernaux *a;
1475 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1477 if (a->vna_other == vernum)
1479 version_string = a->vna_nodename;
1486 return version_string;
1489 /* Display ELF-specific fields of a symbol. */
1492 bfd_elf_print_symbol (bfd *abfd,
1495 bfd_print_symbol_type how)
1497 FILE *file = (FILE *) filep;
1500 case bfd_print_symbol_name:
1501 fprintf (file, "%s", symbol->name);
1503 case bfd_print_symbol_more:
1504 fprintf (file, "elf ");
1505 bfd_fprintf_vma (abfd, file, symbol->value);
1506 fprintf (file, " %lx", (unsigned long) symbol->flags);
1508 case bfd_print_symbol_all:
1510 const char *section_name;
1511 const char *name = NULL;
1512 const struct elf_backend_data *bed;
1513 unsigned char st_other;
1515 const char *version_string;
1518 section_name = symbol->section ? symbol->section->name : "(*none*)";
1520 bed = get_elf_backend_data (abfd);
1521 if (bed->elf_backend_print_symbol_all)
1522 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1526 name = symbol->name;
1527 bfd_print_symbol_vandf (abfd, file, symbol);
1530 fprintf (file, " %s\t", section_name);
1531 /* Print the "other" value for a symbol. For common symbols,
1532 we've already printed the size; now print the alignment.
1533 For other symbols, we have no specified alignment, and
1534 we've printed the address; now print the size. */
1535 if (symbol->section && bfd_is_com_section (symbol->section))
1536 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1538 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1539 bfd_fprintf_vma (abfd, file, val);
1541 /* If we have version information, print it. */
1542 version_string = _bfd_elf_get_symbol_version_string (abfd,
1548 fprintf (file, " %-11s", version_string);
1553 fprintf (file, " (%s)", version_string);
1554 for (i = 10 - strlen (version_string); i > 0; --i)
1559 /* If the st_other field is not zero, print it. */
1560 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1565 case STV_INTERNAL: fprintf (file, " .internal"); break;
1566 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1567 case STV_PROTECTED: fprintf (file, " .protected"); break;
1569 /* Some other non-defined flags are also present, so print
1571 fprintf (file, " 0x%02x", (unsigned int) st_other);
1574 fprintf (file, " %s", name);
1580 /* Allocate an ELF string table--force the first byte to be zero. */
1582 struct bfd_strtab_hash *
1583 _bfd_elf_stringtab_init (void)
1585 struct bfd_strtab_hash *ret;
1587 ret = _bfd_stringtab_init ();
1592 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1593 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1594 if (loc == (bfd_size_type) -1)
1596 _bfd_stringtab_free (ret);
1603 /* ELF .o/exec file reading */
1605 /* Create a new bfd section from an ELF section header. */
1608 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1610 Elf_Internal_Shdr *hdr;
1611 Elf_Internal_Ehdr *ehdr;
1612 const struct elf_backend_data *bed;
1614 bfd_boolean ret = TRUE;
1615 static bfd_boolean * sections_being_created = NULL;
1616 static bfd * sections_being_created_abfd = NULL;
1617 static unsigned int nesting = 0;
1619 if (shindex >= elf_numsections (abfd))
1624 /* PR17512: A corrupt ELF binary might contain a recursive group of
1625 sections, with each the string indicies pointing to the next in the
1626 loop. Detect this here, by refusing to load a section that we are
1627 already in the process of loading. We only trigger this test if
1628 we have nested at least three sections deep as normal ELF binaries
1629 can expect to recurse at least once.
1631 FIXME: It would be better if this array was attached to the bfd,
1632 rather than being held in a static pointer. */
1634 if (sections_being_created_abfd != abfd)
1635 sections_being_created = NULL;
1636 if (sections_being_created == NULL)
1638 /* FIXME: It would be more efficient to attach this array to the bfd somehow. */
1639 sections_being_created = (bfd_boolean *)
1640 bfd_zalloc (abfd, elf_numsections (abfd) * sizeof (bfd_boolean));
1641 sections_being_created_abfd = abfd;
1643 if (sections_being_created [shindex])
1645 (*_bfd_error_handler)
1646 (_("%B: warning: loop in section dependencies detected"), abfd);
1649 sections_being_created [shindex] = TRUE;
1652 hdr = elf_elfsections (abfd)[shindex];
1653 ehdr = elf_elfheader (abfd);
1654 name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx,
1659 bed = get_elf_backend_data (abfd);
1660 switch (hdr->sh_type)
1663 /* Inactive section. Throw it away. */
1666 case SHT_PROGBITS: /* Normal section with contents. */
1667 case SHT_NOBITS: /* .bss section. */
1668 case SHT_HASH: /* .hash section. */
1669 case SHT_NOTE: /* .note section. */
1670 case SHT_INIT_ARRAY: /* .init_array section. */
1671 case SHT_FINI_ARRAY: /* .fini_array section. */
1672 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1673 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1674 case SHT_GNU_HASH: /* .gnu.hash section. */
1675 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1678 case SHT_DYNAMIC: /* Dynamic linking information. */
1679 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1682 if (hdr->sh_link > elf_numsections (abfd))
1684 /* PR 10478: Accept Solaris binaries with a sh_link
1685 field set to SHN_BEFORE or SHN_AFTER. */
1686 switch (bfd_get_arch (abfd))
1689 case bfd_arch_sparc:
1690 if (hdr->sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
1691 || hdr->sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
1693 /* Otherwise fall through. */
1698 else if (elf_elfsections (abfd)[hdr->sh_link] == NULL)
1700 else if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1702 Elf_Internal_Shdr *dynsymhdr;
1704 /* The shared libraries distributed with hpux11 have a bogus
1705 sh_link field for the ".dynamic" section. Find the
1706 string table for the ".dynsym" section instead. */
1707 if (elf_dynsymtab (abfd) != 0)
1709 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1710 hdr->sh_link = dynsymhdr->sh_link;
1714 unsigned int i, num_sec;
1716 num_sec = elf_numsections (abfd);
1717 for (i = 1; i < num_sec; i++)
1719 dynsymhdr = elf_elfsections (abfd)[i];
1720 if (dynsymhdr->sh_type == SHT_DYNSYM)
1722 hdr->sh_link = dynsymhdr->sh_link;
1730 case SHT_SYMTAB: /* A symbol table. */
1731 if (elf_onesymtab (abfd) == shindex)
1734 if (hdr->sh_entsize != bed->s->sizeof_sym)
1737 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
1739 if (hdr->sh_size != 0)
1741 /* Some assemblers erroneously set sh_info to one with a
1742 zero sh_size. ld sees this as a global symbol count
1743 of (unsigned) -1. Fix it here. */
1748 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1749 elf_onesymtab (abfd) = shindex;
1750 elf_tdata (abfd)->symtab_hdr = *hdr;
1751 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1752 abfd->flags |= HAS_SYMS;
1754 /* Sometimes a shared object will map in the symbol table. If
1755 SHF_ALLOC is set, and this is a shared object, then we also
1756 treat this section as a BFD section. We can not base the
1757 decision purely on SHF_ALLOC, because that flag is sometimes
1758 set in a relocatable object file, which would confuse the
1760 if ((hdr->sh_flags & SHF_ALLOC) != 0
1761 && (abfd->flags & DYNAMIC) != 0
1762 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1766 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1767 can't read symbols without that section loaded as well. It
1768 is most likely specified by the next section header. */
1769 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1771 unsigned int i, num_sec;
1773 num_sec = elf_numsections (abfd);
1774 for (i = shindex + 1; i < num_sec; i++)
1776 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1777 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1778 && hdr2->sh_link == shindex)
1782 for (i = 1; i < shindex; i++)
1784 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1785 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1786 && hdr2->sh_link == shindex)
1790 ret = bfd_section_from_shdr (abfd, i);
1794 case SHT_DYNSYM: /* A dynamic symbol table. */
1795 if (elf_dynsymtab (abfd) == shindex)
1798 if (hdr->sh_entsize != bed->s->sizeof_sym)
1801 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
1803 if (hdr->sh_size != 0)
1806 /* Some linkers erroneously set sh_info to one with a
1807 zero sh_size. ld sees this as a global symbol count
1808 of (unsigned) -1. Fix it here. */
1813 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1814 elf_dynsymtab (abfd) = shindex;
1815 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1816 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1817 abfd->flags |= HAS_SYMS;
1819 /* Besides being a symbol table, we also treat this as a regular
1820 section, so that objcopy can handle it. */
1821 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1824 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections. */
1825 if (elf_symtab_shndx (abfd) == shindex)
1828 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1829 elf_symtab_shndx (abfd) = shindex;
1830 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1831 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1834 case SHT_STRTAB: /* A string table. */
1835 if (hdr->bfd_section != NULL)
1838 if (ehdr->e_shstrndx == shindex)
1840 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1841 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1845 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1848 elf_tdata (abfd)->strtab_hdr = *hdr;
1849 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1853 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1856 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1857 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1858 elf_elfsections (abfd)[shindex] = hdr;
1859 /* We also treat this as a regular section, so that objcopy
1861 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1866 /* If the string table isn't one of the above, then treat it as a
1867 regular section. We need to scan all the headers to be sure,
1868 just in case this strtab section appeared before the above. */
1869 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1871 unsigned int i, num_sec;
1873 num_sec = elf_numsections (abfd);
1874 for (i = 1; i < num_sec; i++)
1876 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1877 if (hdr2->sh_link == shindex)
1879 /* Prevent endless recursion on broken objects. */
1882 if (! bfd_section_from_shdr (abfd, i))
1884 if (elf_onesymtab (abfd) == i)
1886 if (elf_dynsymtab (abfd) == i)
1887 goto dynsymtab_strtab;
1891 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1896 /* *These* do a lot of work -- but build no sections! */
1898 asection *target_sect;
1899 Elf_Internal_Shdr *hdr2, **p_hdr;
1900 unsigned int num_sec = elf_numsections (abfd);
1901 struct bfd_elf_section_data *esdt;
1905 != (bfd_size_type) (hdr->sh_type == SHT_REL
1906 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
1909 /* Check for a bogus link to avoid crashing. */
1910 if (hdr->sh_link >= num_sec)
1912 ((*_bfd_error_handler)
1913 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1914 abfd, hdr->sh_link, name, shindex));
1915 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1920 /* For some incomprehensible reason Oracle distributes
1921 libraries for Solaris in which some of the objects have
1922 bogus sh_link fields. It would be nice if we could just
1923 reject them, but, unfortunately, some people need to use
1924 them. We scan through the section headers; if we find only
1925 one suitable symbol table, we clobber the sh_link to point
1926 to it. I hope this doesn't break anything.
1928 Don't do it on executable nor shared library. */
1929 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0
1930 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1931 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1937 for (scan = 1; scan < num_sec; scan++)
1939 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1940 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1951 hdr->sh_link = found;
1954 /* Get the symbol table. */
1955 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1956 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
1957 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1960 /* If this reloc section does not use the main symbol table we
1961 don't treat it as a reloc section. BFD can't adequately
1962 represent such a section, so at least for now, we don't
1963 try. We just present it as a normal section. We also
1964 can't use it as a reloc section if it points to the null
1965 section, an invalid section, another reloc section, or its
1966 sh_link points to the null section. */
1967 if (hdr->sh_link != elf_onesymtab (abfd)
1968 || hdr->sh_link == SHN_UNDEF
1969 || hdr->sh_info == SHN_UNDEF
1970 || hdr->sh_info >= num_sec
1971 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
1972 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
1974 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1979 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1982 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1983 if (target_sect == NULL)
1986 esdt = elf_section_data (target_sect);
1987 if (hdr->sh_type == SHT_RELA)
1988 p_hdr = &esdt->rela.hdr;
1990 p_hdr = &esdt->rel.hdr;
1992 /* PR 17512: file: 0b4f81b7. */
1995 amt = sizeof (*hdr2);
1996 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
2001 elf_elfsections (abfd)[shindex] = hdr2;
2002 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
2003 target_sect->flags |= SEC_RELOC;
2004 target_sect->relocation = NULL;
2005 target_sect->rel_filepos = hdr->sh_offset;
2006 /* In the section to which the relocations apply, mark whether
2007 its relocations are of the REL or RELA variety. */
2008 if (hdr->sh_size != 0)
2010 if (hdr->sh_type == SHT_RELA)
2011 target_sect->use_rela_p = 1;
2013 abfd->flags |= HAS_RELOC;
2017 case SHT_GNU_verdef:
2018 elf_dynverdef (abfd) = shindex;
2019 elf_tdata (abfd)->dynverdef_hdr = *hdr;
2020 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2023 case SHT_GNU_versym:
2024 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
2027 elf_dynversym (abfd) = shindex;
2028 elf_tdata (abfd)->dynversym_hdr = *hdr;
2029 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2032 case SHT_GNU_verneed:
2033 elf_dynverref (abfd) = shindex;
2034 elf_tdata (abfd)->dynverref_hdr = *hdr;
2035 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2042 if (! IS_VALID_GROUP_SECTION_HEADER (hdr, GRP_ENTRY_SIZE))
2045 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2048 if (hdr->contents != NULL)
2050 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
2051 unsigned int n_elt = hdr->sh_size / sizeof (* idx);
2056 if (idx->flags & GRP_COMDAT)
2057 hdr->bfd_section->flags
2058 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
2060 /* We try to keep the same section order as it comes in. */
2063 while (--n_elt != 0)
2067 if (idx->shdr != NULL
2068 && (s = idx->shdr->bfd_section) != NULL
2069 && elf_next_in_group (s) != NULL)
2071 elf_next_in_group (hdr->bfd_section) = s;
2079 /* Possibly an attributes section. */
2080 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
2081 || hdr->sh_type == bed->obj_attrs_section_type)
2083 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2085 _bfd_elf_parse_attributes (abfd, hdr);
2089 /* Check for any processor-specific section types. */
2090 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
2093 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
2095 if ((hdr->sh_flags & SHF_ALLOC) != 0)
2096 /* FIXME: How to properly handle allocated section reserved
2097 for applications? */
2098 (*_bfd_error_handler)
2099 (_("%B: don't know how to handle allocated, application "
2100 "specific section `%s' [0x%8x]"),
2101 abfd, name, hdr->sh_type);
2104 /* Allow sections reserved for applications. */
2105 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2110 else if (hdr->sh_type >= SHT_LOPROC
2111 && hdr->sh_type <= SHT_HIPROC)
2112 /* FIXME: We should handle this section. */
2113 (*_bfd_error_handler)
2114 (_("%B: don't know how to handle processor specific section "
2116 abfd, name, hdr->sh_type);
2117 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
2119 /* Unrecognised OS-specific sections. */
2120 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
2121 /* SHF_OS_NONCONFORMING indicates that special knowledge is
2122 required to correctly process the section and the file should
2123 be rejected with an error message. */
2124 (*_bfd_error_handler)
2125 (_("%B: don't know how to handle OS specific section "
2127 abfd, name, hdr->sh_type);
2130 /* Otherwise it should be processed. */
2131 ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2136 /* FIXME: We should handle this section. */
2137 (*_bfd_error_handler)
2138 (_("%B: don't know how to handle section `%s' [0x%8x]"),
2139 abfd, name, hdr->sh_type);
2147 if (sections_being_created && sections_being_created_abfd == abfd)
2148 sections_being_created [shindex] = FALSE;
2149 if (-- nesting == 0)
2151 sections_being_created = NULL;
2152 sections_being_created_abfd = abfd;
2157 /* Return the local symbol specified by ABFD, R_SYMNDX. */
2160 bfd_sym_from_r_symndx (struct sym_cache *cache,
2162 unsigned long r_symndx)
2164 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2166 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
2168 Elf_Internal_Shdr *symtab_hdr;
2169 unsigned char esym[sizeof (Elf64_External_Sym)];
2170 Elf_External_Sym_Shndx eshndx;
2172 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2173 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2174 &cache->sym[ent], esym, &eshndx) == NULL)
2177 if (cache->abfd != abfd)
2179 memset (cache->indx, -1, sizeof (cache->indx));
2182 cache->indx[ent] = r_symndx;
2185 return &cache->sym[ent];
2188 /* Given an ELF section number, retrieve the corresponding BFD
2192 bfd_section_from_elf_index (bfd *abfd, unsigned int sec_index)
2194 if (sec_index >= elf_numsections (abfd))
2196 return elf_elfsections (abfd)[sec_index]->bfd_section;
2199 static const struct bfd_elf_special_section special_sections_b[] =
2201 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2202 { NULL, 0, 0, 0, 0 }
2205 static const struct bfd_elf_special_section special_sections_c[] =
2207 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
2208 { NULL, 0, 0, 0, 0 }
2211 static const struct bfd_elf_special_section special_sections_d[] =
2213 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2214 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2215 /* There are more DWARF sections than these, but they needn't be added here
2216 unless you have to cope with broken compilers that don't emit section
2217 attributes or you want to help the user writing assembler. */
2218 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
2219 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
2220 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
2221 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
2222 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
2223 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
2224 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
2225 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
2226 { NULL, 0, 0, 0, 0 }
2229 static const struct bfd_elf_special_section special_sections_f[] =
2231 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2232 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2233 { NULL, 0, 0, 0, 0 }
2236 static const struct bfd_elf_special_section special_sections_g[] =
2238 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2239 { STRING_COMMA_LEN (".gnu.lto_"), -1, SHT_PROGBITS, SHF_EXCLUDE },
2240 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2241 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2242 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2243 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2244 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2245 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2246 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2247 { NULL, 0, 0, 0, 0 }
2250 static const struct bfd_elf_special_section special_sections_h[] =
2252 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2253 { NULL, 0, 0, 0, 0 }
2256 static const struct bfd_elf_special_section special_sections_i[] =
2258 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2259 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2260 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2261 { NULL, 0, 0, 0, 0 }
2264 static const struct bfd_elf_special_section special_sections_l[] =
2266 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2267 { NULL, 0, 0, 0, 0 }
2270 static const struct bfd_elf_special_section special_sections_n[] =
2272 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2273 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2274 { NULL, 0, 0, 0, 0 }
2277 static const struct bfd_elf_special_section special_sections_p[] =
2279 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2280 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2281 { NULL, 0, 0, 0, 0 }
2284 static const struct bfd_elf_special_section special_sections_r[] =
2286 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2287 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2288 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2289 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2290 { NULL, 0, 0, 0, 0 }
2293 static const struct bfd_elf_special_section special_sections_s[] =
2295 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2296 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2297 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2298 /* See struct bfd_elf_special_section declaration for the semantics of
2299 this special case where .prefix_length != strlen (.prefix). */
2300 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2301 { NULL, 0, 0, 0, 0 }
2304 static const struct bfd_elf_special_section special_sections_t[] =
2306 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2307 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2308 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2309 { NULL, 0, 0, 0, 0 }
2312 static const struct bfd_elf_special_section special_sections_z[] =
2314 { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 },
2315 { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 },
2316 { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 },
2317 { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 },
2318 { NULL, 0, 0, 0, 0 }
2321 static const struct bfd_elf_special_section * const special_sections[] =
2323 special_sections_b, /* 'b' */
2324 special_sections_c, /* 'c' */
2325 special_sections_d, /* 'd' */
2327 special_sections_f, /* 'f' */
2328 special_sections_g, /* 'g' */
2329 special_sections_h, /* 'h' */
2330 special_sections_i, /* 'i' */
2333 special_sections_l, /* 'l' */
2335 special_sections_n, /* 'n' */
2337 special_sections_p, /* 'p' */
2339 special_sections_r, /* 'r' */
2340 special_sections_s, /* 's' */
2341 special_sections_t, /* 't' */
2347 special_sections_z /* 'z' */
2350 const struct bfd_elf_special_section *
2351 _bfd_elf_get_special_section (const char *name,
2352 const struct bfd_elf_special_section *spec,
2358 len = strlen (name);
2360 for (i = 0; spec[i].prefix != NULL; i++)
2363 int prefix_len = spec[i].prefix_length;
2365 if (len < prefix_len)
2367 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2370 suffix_len = spec[i].suffix_length;
2371 if (suffix_len <= 0)
2373 if (name[prefix_len] != 0)
2375 if (suffix_len == 0)
2377 if (name[prefix_len] != '.'
2378 && (suffix_len == -2
2379 || (rela && spec[i].type == SHT_REL)))
2385 if (len < prefix_len + suffix_len)
2387 if (memcmp (name + len - suffix_len,
2388 spec[i].prefix + prefix_len,
2398 const struct bfd_elf_special_section *
2399 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2402 const struct bfd_elf_special_section *spec;
2403 const struct elf_backend_data *bed;
2405 /* See if this is one of the special sections. */
2406 if (sec->name == NULL)
2409 bed = get_elf_backend_data (abfd);
2410 spec = bed->special_sections;
2413 spec = _bfd_elf_get_special_section (sec->name,
2414 bed->special_sections,
2420 if (sec->name[0] != '.')
2423 i = sec->name[1] - 'b';
2424 if (i < 0 || i > 'z' - 'b')
2427 spec = special_sections[i];
2432 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2436 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2438 struct bfd_elf_section_data *sdata;
2439 const struct elf_backend_data *bed;
2440 const struct bfd_elf_special_section *ssect;
2442 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2445 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd,
2449 sec->used_by_bfd = sdata;
2452 /* Indicate whether or not this section should use RELA relocations. */
2453 bed = get_elf_backend_data (abfd);
2454 sec->use_rela_p = bed->default_use_rela_p;
2456 /* When we read a file, we don't need to set ELF section type and
2457 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2458 anyway. We will set ELF section type and flags for all linker
2459 created sections. If user specifies BFD section flags, we will
2460 set ELF section type and flags based on BFD section flags in
2461 elf_fake_sections. Special handling for .init_array/.fini_array
2462 output sections since they may contain .ctors/.dtors input
2463 sections. We don't want _bfd_elf_init_private_section_data to
2464 copy ELF section type from .ctors/.dtors input sections. */
2465 if (abfd->direction != read_direction
2466 || (sec->flags & SEC_LINKER_CREATED) != 0)
2468 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2471 || (sec->flags & SEC_LINKER_CREATED) != 0
2472 || ssect->type == SHT_INIT_ARRAY
2473 || ssect->type == SHT_FINI_ARRAY))
2475 elf_section_type (sec) = ssect->type;
2476 elf_section_flags (sec) = ssect->attr;
2480 return _bfd_generic_new_section_hook (abfd, sec);
2483 /* Create a new bfd section from an ELF program header.
2485 Since program segments have no names, we generate a synthetic name
2486 of the form segment<NUM>, where NUM is generally the index in the
2487 program header table. For segments that are split (see below) we
2488 generate the names segment<NUM>a and segment<NUM>b.
2490 Note that some program segments may have a file size that is different than
2491 (less than) the memory size. All this means is that at execution the
2492 system must allocate the amount of memory specified by the memory size,
2493 but only initialize it with the first "file size" bytes read from the
2494 file. This would occur for example, with program segments consisting
2495 of combined data+bss.
2497 To handle the above situation, this routine generates TWO bfd sections
2498 for the single program segment. The first has the length specified by
2499 the file size of the segment, and the second has the length specified
2500 by the difference between the two sizes. In effect, the segment is split
2501 into its initialized and uninitialized parts.
2506 _bfd_elf_make_section_from_phdr (bfd *abfd,
2507 Elf_Internal_Phdr *hdr,
2509 const char *type_name)
2517 split = ((hdr->p_memsz > 0)
2518 && (hdr->p_filesz > 0)
2519 && (hdr->p_memsz > hdr->p_filesz));
2521 if (hdr->p_filesz > 0)
2523 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "a" : "");
2524 len = strlen (namebuf) + 1;
2525 name = (char *) bfd_alloc (abfd, len);
2528 memcpy (name, namebuf, len);
2529 newsect = bfd_make_section (abfd, name);
2530 if (newsect == NULL)
2532 newsect->vma = hdr->p_vaddr;
2533 newsect->lma = hdr->p_paddr;
2534 newsect->size = hdr->p_filesz;
2535 newsect->filepos = hdr->p_offset;
2536 newsect->flags |= SEC_HAS_CONTENTS;
2537 newsect->alignment_power = bfd_log2 (hdr->p_align);
2538 if (hdr->p_type == PT_LOAD)
2540 newsect->flags |= SEC_ALLOC;
2541 newsect->flags |= SEC_LOAD;
2542 if (hdr->p_flags & PF_X)
2544 /* FIXME: all we known is that it has execute PERMISSION,
2546 newsect->flags |= SEC_CODE;
2549 if (!(hdr->p_flags & PF_W))
2551 newsect->flags |= SEC_READONLY;
2555 if (hdr->p_memsz > hdr->p_filesz)
2559 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "b" : "");
2560 len = strlen (namebuf) + 1;
2561 name = (char *) bfd_alloc (abfd, len);
2564 memcpy (name, namebuf, len);
2565 newsect = bfd_make_section (abfd, name);
2566 if (newsect == NULL)
2568 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2569 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2570 newsect->size = hdr->p_memsz - hdr->p_filesz;
2571 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2572 align = newsect->vma & -newsect->vma;
2573 if (align == 0 || align > hdr->p_align)
2574 align = hdr->p_align;
2575 newsect->alignment_power = bfd_log2 (align);
2576 if (hdr->p_type == PT_LOAD)
2578 /* Hack for gdb. Segments that have not been modified do
2579 not have their contents written to a core file, on the
2580 assumption that a debugger can find the contents in the
2581 executable. We flag this case by setting the fake
2582 section size to zero. Note that "real" bss sections will
2583 always have their contents dumped to the core file. */
2584 if (bfd_get_format (abfd) == bfd_core)
2586 newsect->flags |= SEC_ALLOC;
2587 if (hdr->p_flags & PF_X)
2588 newsect->flags |= SEC_CODE;
2590 if (!(hdr->p_flags & PF_W))
2591 newsect->flags |= SEC_READONLY;
2598 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int hdr_index)
2600 const struct elf_backend_data *bed;
2602 switch (hdr->p_type)
2605 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "null");
2608 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "load");
2611 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "dynamic");
2614 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "interp");
2617 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "note"))
2619 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2624 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "shlib");
2627 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "phdr");
2629 case PT_GNU_EH_FRAME:
2630 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index,
2634 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "stack");
2637 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "relro");
2640 /* Check for any processor-specific program segment types. */
2641 bed = get_elf_backend_data (abfd);
2642 return bed->elf_backend_section_from_phdr (abfd, hdr, hdr_index, "proc");
2646 /* Return the REL_HDR for SEC, assuming there is only a single one, either
2650 _bfd_elf_single_rel_hdr (asection *sec)
2652 if (elf_section_data (sec)->rel.hdr)
2654 BFD_ASSERT (elf_section_data (sec)->rela.hdr == NULL);
2655 return elf_section_data (sec)->rel.hdr;
2658 return elf_section_data (sec)->rela.hdr;
2661 /* Allocate and initialize a section-header for a new reloc section,
2662 containing relocations against ASECT. It is stored in RELDATA. If
2663 USE_RELA_P is TRUE, we use RELA relocations; otherwise, we use REL
2667 _bfd_elf_init_reloc_shdr (bfd *abfd,
2668 struct bfd_elf_section_reloc_data *reldata,
2670 bfd_boolean use_rela_p)
2672 Elf_Internal_Shdr *rel_hdr;
2674 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2677 amt = sizeof (Elf_Internal_Shdr);
2678 BFD_ASSERT (reldata->hdr == NULL);
2679 rel_hdr = bfd_zalloc (abfd, amt);
2680 reldata->hdr = rel_hdr;
2682 amt = sizeof ".rela" + strlen (asect->name);
2683 name = (char *) bfd_alloc (abfd, amt);
2686 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2688 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2690 if (rel_hdr->sh_name == (unsigned int) -1)
2692 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2693 rel_hdr->sh_entsize = (use_rela_p
2694 ? bed->s->sizeof_rela
2695 : bed->s->sizeof_rel);
2696 rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
2697 rel_hdr->sh_flags = 0;
2698 rel_hdr->sh_addr = 0;
2699 rel_hdr->sh_size = 0;
2700 rel_hdr->sh_offset = 0;
2705 /* Return the default section type based on the passed in section flags. */
2708 bfd_elf_get_default_section_type (flagword flags)
2710 if ((flags & SEC_ALLOC) != 0
2711 && (flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2713 return SHT_PROGBITS;
2716 struct fake_section_arg
2718 struct bfd_link_info *link_info;
2722 /* Set up an ELF internal section header for a section. */
2725 elf_fake_sections (bfd *abfd, asection *asect, void *fsarg)
2727 struct fake_section_arg *arg = (struct fake_section_arg *)fsarg;
2728 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2729 struct bfd_elf_section_data *esd = elf_section_data (asect);
2730 Elf_Internal_Shdr *this_hdr;
2731 unsigned int sh_type;
2735 /* We already failed; just get out of the bfd_map_over_sections
2740 this_hdr = &esd->this_hdr;
2742 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2743 asect->name, FALSE);
2744 if (this_hdr->sh_name == (unsigned int) -1)
2750 /* Don't clear sh_flags. Assembler may set additional bits. */
2752 if ((asect->flags & SEC_ALLOC) != 0
2753 || asect->user_set_vma)
2754 this_hdr->sh_addr = asect->vma;
2756 this_hdr->sh_addr = 0;
2758 this_hdr->sh_offset = 0;
2759 this_hdr->sh_size = asect->size;
2760 this_hdr->sh_link = 0;
2761 this_hdr->sh_addralign = (bfd_vma) 1 << asect->alignment_power;
2762 /* The sh_entsize and sh_info fields may have been set already by
2763 copy_private_section_data. */
2765 this_hdr->bfd_section = asect;
2766 this_hdr->contents = NULL;
2768 /* If the section type is unspecified, we set it based on
2770 if ((asect->flags & SEC_GROUP) != 0)
2771 sh_type = SHT_GROUP;
2773 sh_type = bfd_elf_get_default_section_type (asect->flags);
2775 if (this_hdr->sh_type == SHT_NULL)
2776 this_hdr->sh_type = sh_type;
2777 else if (this_hdr->sh_type == SHT_NOBITS
2778 && sh_type == SHT_PROGBITS
2779 && (asect->flags & SEC_ALLOC) != 0)
2781 /* Warn if we are changing a NOBITS section to PROGBITS, but
2782 allow the link to proceed. This can happen when users link
2783 non-bss input sections to bss output sections, or emit data
2784 to a bss output section via a linker script. */
2785 (*_bfd_error_handler)
2786 (_("warning: section `%A' type changed to PROGBITS"), asect);
2787 this_hdr->sh_type = sh_type;
2790 switch (this_hdr->sh_type)
2796 case SHT_INIT_ARRAY:
2797 case SHT_FINI_ARRAY:
2798 case SHT_PREINIT_ARRAY:
2805 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2809 this_hdr->sh_entsize = bed->s->sizeof_sym;
2813 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2817 if (get_elf_backend_data (abfd)->may_use_rela_p)
2818 this_hdr->sh_entsize = bed->s->sizeof_rela;
2822 if (get_elf_backend_data (abfd)->may_use_rel_p)
2823 this_hdr->sh_entsize = bed->s->sizeof_rel;
2826 case SHT_GNU_versym:
2827 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2830 case SHT_GNU_verdef:
2831 this_hdr->sh_entsize = 0;
2832 /* objcopy or strip will copy over sh_info, but may not set
2833 cverdefs. The linker will set cverdefs, but sh_info will be
2835 if (this_hdr->sh_info == 0)
2836 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2838 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2839 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2842 case SHT_GNU_verneed:
2843 this_hdr->sh_entsize = 0;
2844 /* objcopy or strip will copy over sh_info, but may not set
2845 cverrefs. The linker will set cverrefs, but sh_info will be
2847 if (this_hdr->sh_info == 0)
2848 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2850 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2851 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2855 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
2859 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
2863 if ((asect->flags & SEC_ALLOC) != 0)
2864 this_hdr->sh_flags |= SHF_ALLOC;
2865 if ((asect->flags & SEC_READONLY) == 0)
2866 this_hdr->sh_flags |= SHF_WRITE;
2867 if ((asect->flags & SEC_CODE) != 0)
2868 this_hdr->sh_flags |= SHF_EXECINSTR;
2869 if ((asect->flags & SEC_MERGE) != 0)
2871 this_hdr->sh_flags |= SHF_MERGE;
2872 this_hdr->sh_entsize = asect->entsize;
2873 if ((asect->flags & SEC_STRINGS) != 0)
2874 this_hdr->sh_flags |= SHF_STRINGS;
2876 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2877 this_hdr->sh_flags |= SHF_GROUP;
2878 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2880 this_hdr->sh_flags |= SHF_TLS;
2881 if (asect->size == 0
2882 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2884 struct bfd_link_order *o = asect->map_tail.link_order;
2886 this_hdr->sh_size = 0;
2889 this_hdr->sh_size = o->offset + o->size;
2890 if (this_hdr->sh_size != 0)
2891 this_hdr->sh_type = SHT_NOBITS;
2895 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
2896 this_hdr->sh_flags |= SHF_EXCLUDE;
2898 /* If the section has relocs, set up a section header for the
2899 SHT_REL[A] section. If two relocation sections are required for
2900 this section, it is up to the processor-specific back-end to
2901 create the other. */
2902 if ((asect->flags & SEC_RELOC) != 0)
2904 /* When doing a relocatable link, create both REL and RELA sections if
2907 /* Do the normal setup if we wouldn't create any sections here. */
2908 && esd->rel.count + esd->rela.count > 0
2909 && (arg->link_info->relocatable || arg->link_info->emitrelocations))
2911 if (esd->rel.count && esd->rel.hdr == NULL
2912 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rel, asect, FALSE))
2917 if (esd->rela.count && esd->rela.hdr == NULL
2918 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rela, asect, TRUE))
2924 else if (!_bfd_elf_init_reloc_shdr (abfd,
2926 ? &esd->rela : &esd->rel),
2932 /* Check for processor-specific section types. */
2933 sh_type = this_hdr->sh_type;
2934 if (bed->elf_backend_fake_sections
2935 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2938 if (sh_type == SHT_NOBITS && asect->size != 0)
2940 /* Don't change the header type from NOBITS if we are being
2941 called for objcopy --only-keep-debug. */
2942 this_hdr->sh_type = sh_type;
2946 /* Fill in the contents of a SHT_GROUP section. Called from
2947 _bfd_elf_compute_section_file_positions for gas, objcopy, and
2948 when ELF targets use the generic linker, ld. Called for ld -r
2949 from bfd_elf_final_link. */
2952 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2954 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
2955 asection *elt, *first;
2959 /* Ignore linker created group section. See elfNN_ia64_object_p in
2961 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2965 if (elf_section_data (sec)->this_hdr.sh_info == 0)
2967 unsigned long symindx = 0;
2969 /* elf_group_id will have been set up by objcopy and the
2971 if (elf_group_id (sec) != NULL)
2972 symindx = elf_group_id (sec)->udata.i;
2976 /* If called from the assembler, swap_out_syms will have set up
2977 elf_section_syms. */
2978 BFD_ASSERT (elf_section_syms (abfd) != NULL);
2979 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2981 elf_section_data (sec)->this_hdr.sh_info = symindx;
2983 else if (elf_section_data (sec)->this_hdr.sh_info == (unsigned int) -2)
2985 /* The ELF backend linker sets sh_info to -2 when the group
2986 signature symbol is global, and thus the index can't be
2987 set until all local symbols are output. */
2988 asection *igroup = elf_sec_group (elf_next_in_group (sec));
2989 struct bfd_elf_section_data *sec_data = elf_section_data (igroup);
2990 unsigned long symndx = sec_data->this_hdr.sh_info;
2991 unsigned long extsymoff = 0;
2992 struct elf_link_hash_entry *h;
2994 if (!elf_bad_symtab (igroup->owner))
2996 Elf_Internal_Shdr *symtab_hdr;
2998 symtab_hdr = &elf_tdata (igroup->owner)->symtab_hdr;
2999 extsymoff = symtab_hdr->sh_info;
3001 h = elf_sym_hashes (igroup->owner)[symndx - extsymoff];
3002 while (h->root.type == bfd_link_hash_indirect
3003 || h->root.type == bfd_link_hash_warning)
3004 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3006 elf_section_data (sec)->this_hdr.sh_info = h->indx;
3009 /* The contents won't be allocated for "ld -r" or objcopy. */
3011 if (sec->contents == NULL)
3014 sec->contents = (unsigned char *) bfd_alloc (abfd, sec->size);
3016 /* Arrange for the section to be written out. */
3017 elf_section_data (sec)->this_hdr.contents = sec->contents;
3018 if (sec->contents == NULL)
3025 loc = sec->contents + sec->size;
3027 /* Get the pointer to the first section in the group that gas
3028 squirreled away here. objcopy arranges for this to be set to the
3029 start of the input section group. */
3030 first = elt = elf_next_in_group (sec);
3032 /* First element is a flag word. Rest of section is elf section
3033 indices for all the sections of the group. Write them backwards
3034 just to keep the group in the same order as given in .section
3035 directives, not that it matters. */
3042 s = s->output_section;
3044 && !bfd_is_abs_section (s))
3046 unsigned int idx = elf_section_data (s)->this_idx;
3049 H_PUT_32 (abfd, idx, loc);
3051 elt = elf_next_in_group (elt);
3056 if ((loc -= 4) != sec->contents)
3059 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
3062 /* Assign all ELF section numbers. The dummy first section is handled here
3063 too. The link/info pointers for the standard section types are filled
3064 in here too, while we're at it. */
3067 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
3069 struct elf_obj_tdata *t = elf_tdata (abfd);
3071 unsigned int section_number, secn;
3072 Elf_Internal_Shdr **i_shdrp;
3073 struct bfd_elf_section_data *d;
3074 bfd_boolean need_symtab;
3078 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
3080 /* SHT_GROUP sections are in relocatable files only. */
3081 if (link_info == NULL || link_info->relocatable)
3083 /* Put SHT_GROUP sections first. */
3084 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3086 d = elf_section_data (sec);
3088 if (d->this_hdr.sh_type == SHT_GROUP)
3090 if (sec->flags & SEC_LINKER_CREATED)
3092 /* Remove the linker created SHT_GROUP sections. */
3093 bfd_section_list_remove (abfd, sec);
3094 abfd->section_count--;
3097 d->this_idx = section_number++;
3102 for (sec = abfd->sections; sec; sec = sec->next)
3104 d = elf_section_data (sec);
3106 if (d->this_hdr.sh_type != SHT_GROUP)
3107 d->this_idx = section_number++;
3108 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
3111 d->rel.idx = section_number++;
3112 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel.hdr->sh_name);
3119 d->rela.idx = section_number++;
3120 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rela.hdr->sh_name);
3126 elf_shstrtab_sec (abfd) = section_number++;
3127 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
3128 elf_elfheader (abfd)->e_shstrndx = elf_shstrtab_sec (abfd);
3130 need_symtab = (bfd_get_symcount (abfd) > 0
3131 || (link_info == NULL
3132 && ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3136 elf_onesymtab (abfd) = section_number++;
3137 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
3138 if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
3140 elf_symtab_shndx (abfd) = section_number++;
3141 t->symtab_shndx_hdr.sh_name
3142 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3143 ".symtab_shndx", FALSE);
3144 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
3147 elf_strtab_sec (abfd) = section_number++;
3148 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
3151 if (section_number >= SHN_LORESERVE)
3153 _bfd_error_handler (_("%B: too many sections: %u"),
3154 abfd, section_number);
3158 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
3159 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3161 elf_numsections (abfd) = section_number;
3162 elf_elfheader (abfd)->e_shnum = section_number;
3164 /* Set up the list of section header pointers, in agreement with the
3166 i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc2 (abfd, section_number,
3167 sizeof (Elf_Internal_Shdr *));
3168 if (i_shdrp == NULL)
3171 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd,
3172 sizeof (Elf_Internal_Shdr));
3173 if (i_shdrp[0] == NULL)
3175 bfd_release (abfd, i_shdrp);
3179 elf_elfsections (abfd) = i_shdrp;
3181 i_shdrp[elf_shstrtab_sec (abfd)] = &t->shstrtab_hdr;
3184 i_shdrp[elf_onesymtab (abfd)] = &t->symtab_hdr;
3185 if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF))
3187 i_shdrp[elf_symtab_shndx (abfd)] = &t->symtab_shndx_hdr;
3188 t->symtab_shndx_hdr.sh_link = elf_onesymtab (abfd);
3190 i_shdrp[elf_strtab_sec (abfd)] = &t->strtab_hdr;
3191 t->symtab_hdr.sh_link = elf_strtab_sec (abfd);
3194 for (sec = abfd->sections; sec; sec = sec->next)
3199 d = elf_section_data (sec);
3201 i_shdrp[d->this_idx] = &d->this_hdr;
3202 if (d->rel.idx != 0)
3203 i_shdrp[d->rel.idx] = d->rel.hdr;
3204 if (d->rela.idx != 0)
3205 i_shdrp[d->rela.idx] = d->rela.hdr;
3207 /* Fill in the sh_link and sh_info fields while we're at it. */
3209 /* sh_link of a reloc section is the section index of the symbol
3210 table. sh_info is the section index of the section to which
3211 the relocation entries apply. */
3212 if (d->rel.idx != 0)
3214 d->rel.hdr->sh_link = elf_onesymtab (abfd);
3215 d->rel.hdr->sh_info = d->this_idx;
3216 d->rel.hdr->sh_flags |= SHF_INFO_LINK;
3218 if (d->rela.idx != 0)
3220 d->rela.hdr->sh_link = elf_onesymtab (abfd);
3221 d->rela.hdr->sh_info = d->this_idx;
3222 d->rela.hdr->sh_flags |= SHF_INFO_LINK;
3225 /* We need to set up sh_link for SHF_LINK_ORDER. */
3226 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3228 s = elf_linked_to_section (sec);
3231 /* elf_linked_to_section points to the input section. */
3232 if (link_info != NULL)
3234 /* Check discarded linkonce section. */
3235 if (discarded_section (s))
3238 (*_bfd_error_handler)
3239 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3240 abfd, d->this_hdr.bfd_section,
3242 /* Point to the kept section if it has the same
3243 size as the discarded one. */
3244 kept = _bfd_elf_check_kept_section (s, link_info);
3247 bfd_set_error (bfd_error_bad_value);
3253 s = s->output_section;
3254 BFD_ASSERT (s != NULL);
3258 /* Handle objcopy. */
3259 if (s->output_section == NULL)
3261 (*_bfd_error_handler)
3262 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
3263 abfd, d->this_hdr.bfd_section, s, s->owner);
3264 bfd_set_error (bfd_error_bad_value);
3267 s = s->output_section;
3269 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3274 The Intel C compiler generates SHT_IA_64_UNWIND with
3275 SHF_LINK_ORDER. But it doesn't set the sh_link or
3276 sh_info fields. Hence we could get the situation
3278 const struct elf_backend_data *bed
3279 = get_elf_backend_data (abfd);
3280 if (bed->link_order_error_handler)
3281 bed->link_order_error_handler
3282 (_("%B: warning: sh_link not set for section `%A'"),
3287 switch (d->this_hdr.sh_type)
3291 /* A reloc section which we are treating as a normal BFD
3292 section. sh_link is the section index of the symbol
3293 table. sh_info is the section index of the section to
3294 which the relocation entries apply. We assume that an
3295 allocated reloc section uses the dynamic symbol table.
3296 FIXME: How can we be sure? */
3297 s = bfd_get_section_by_name (abfd, ".dynsym");
3299 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3301 /* We look up the section the relocs apply to by name. */
3303 if (d->this_hdr.sh_type == SHT_REL)
3307 s = bfd_get_section_by_name (abfd, name);
3310 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3311 d->this_hdr.sh_flags |= SHF_INFO_LINK;
3316 /* We assume that a section named .stab*str is a stabs
3317 string section. We look for a section with the same name
3318 but without the trailing ``str'', and set its sh_link
3319 field to point to this section. */
3320 if (CONST_STRNEQ (sec->name, ".stab")
3321 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3326 len = strlen (sec->name);
3327 alc = (char *) bfd_malloc (len - 2);
3330 memcpy (alc, sec->name, len - 3);
3331 alc[len - 3] = '\0';
3332 s = bfd_get_section_by_name (abfd, alc);
3336 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3338 /* This is a .stab section. */
3339 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3340 elf_section_data (s)->this_hdr.sh_entsize
3341 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3348 case SHT_GNU_verneed:
3349 case SHT_GNU_verdef:
3350 /* sh_link is the section header index of the string table
3351 used for the dynamic entries, or the symbol table, or the
3353 s = bfd_get_section_by_name (abfd, ".dynstr");
3355 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3358 case SHT_GNU_LIBLIST:
3359 /* sh_link is the section header index of the prelink library
3360 list used for the dynamic entries, or the symbol table, or
3361 the version strings. */
3362 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3363 ? ".dynstr" : ".gnu.libstr");
3365 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3370 case SHT_GNU_versym:
3371 /* sh_link is the section header index of the symbol table
3372 this hash table or version table is for. */
3373 s = bfd_get_section_by_name (abfd, ".dynsym");
3375 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3379 d->this_hdr.sh_link = elf_onesymtab (abfd);
3383 for (secn = 1; secn < section_number; ++secn)
3384 if (i_shdrp[secn] == NULL)
3385 i_shdrp[secn] = i_shdrp[0];
3387 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3388 i_shdrp[secn]->sh_name);
3393 sym_is_global (bfd *abfd, asymbol *sym)
3395 /* If the backend has a special mapping, use it. */
3396 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3397 if (bed->elf_backend_sym_is_global)
3398 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3400 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_GNU_UNIQUE)) != 0
3401 || bfd_is_und_section (bfd_get_section (sym))
3402 || bfd_is_com_section (bfd_get_section (sym)));
3405 /* Don't output section symbols for sections that are not going to be
3406 output, that are duplicates or there is no BFD section. */
3409 ignore_section_sym (bfd *abfd, asymbol *sym)
3411 elf_symbol_type *type_ptr;
3413 if ((sym->flags & BSF_SECTION_SYM) == 0)
3416 type_ptr = elf_symbol_from (abfd, sym);
3417 return ((type_ptr != NULL
3418 && type_ptr->internal_elf_sym.st_shndx != 0
3419 && bfd_is_abs_section (sym->section))
3420 || !(sym->section->owner == abfd
3421 || (sym->section->output_section->owner == abfd
3422 && sym->section->output_offset == 0)
3423 || bfd_is_abs_section (sym->section)));
3426 /* Map symbol from it's internal number to the external number, moving
3427 all local symbols to be at the head of the list. */
3430 elf_map_symbols (bfd *abfd, unsigned int *pnum_locals)
3432 unsigned int symcount = bfd_get_symcount (abfd);
3433 asymbol **syms = bfd_get_outsymbols (abfd);
3434 asymbol **sect_syms;
3435 unsigned int num_locals = 0;
3436 unsigned int num_globals = 0;
3437 unsigned int num_locals2 = 0;
3438 unsigned int num_globals2 = 0;
3445 fprintf (stderr, "elf_map_symbols\n");
3449 for (asect = abfd->sections; asect; asect = asect->next)
3451 if (max_index < asect->index)
3452 max_index = asect->index;
3456 sect_syms = (asymbol **) bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3457 if (sect_syms == NULL)
3459 elf_section_syms (abfd) = sect_syms;
3460 elf_num_section_syms (abfd) = max_index;
3462 /* Init sect_syms entries for any section symbols we have already
3463 decided to output. */
3464 for (idx = 0; idx < symcount; idx++)
3466 asymbol *sym = syms[idx];
3468 if ((sym->flags & BSF_SECTION_SYM) != 0
3470 && !ignore_section_sym (abfd, sym)
3471 && !bfd_is_abs_section (sym->section))
3473 asection *sec = sym->section;
3475 if (sec->owner != abfd)
3476 sec = sec->output_section;
3478 sect_syms[sec->index] = syms[idx];
3482 /* Classify all of the symbols. */
3483 for (idx = 0; idx < symcount; idx++)
3485 if (sym_is_global (abfd, syms[idx]))
3487 else if (!ignore_section_sym (abfd, syms[idx]))
3491 /* We will be adding a section symbol for each normal BFD section. Most
3492 sections will already have a section symbol in outsymbols, but
3493 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3494 at least in that case. */
3495 for (asect = abfd->sections; asect; asect = asect->next)
3497 if (sect_syms[asect->index] == NULL)
3499 if (!sym_is_global (abfd, asect->symbol))
3506 /* Now sort the symbols so the local symbols are first. */
3507 new_syms = (asymbol **) bfd_alloc2 (abfd, num_locals + num_globals,
3508 sizeof (asymbol *));
3510 if (new_syms == NULL)
3513 for (idx = 0; idx < symcount; idx++)
3515 asymbol *sym = syms[idx];
3518 if (sym_is_global (abfd, sym))
3519 i = num_locals + num_globals2++;
3520 else if (!ignore_section_sym (abfd, sym))
3525 sym->udata.i = i + 1;
3527 for (asect = abfd->sections; asect; asect = asect->next)
3529 if (sect_syms[asect->index] == NULL)
3531 asymbol *sym = asect->symbol;
3534 sect_syms[asect->index] = sym;
3535 if (!sym_is_global (abfd, sym))
3538 i = num_locals + num_globals2++;
3540 sym->udata.i = i + 1;
3544 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3546 *pnum_locals = num_locals;
3550 /* Align to the maximum file alignment that could be required for any
3551 ELF data structure. */
3553 static inline file_ptr
3554 align_file_position (file_ptr off, int align)
3556 return (off + align - 1) & ~(align - 1);
3559 /* Assign a file position to a section, optionally aligning to the
3560 required section alignment. */
3563 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3567 if (align && i_shdrp->sh_addralign > 1)
3568 offset = BFD_ALIGN (offset, i_shdrp->sh_addralign);
3569 i_shdrp->sh_offset = offset;
3570 if (i_shdrp->bfd_section != NULL)
3571 i_shdrp->bfd_section->filepos = offset;
3572 if (i_shdrp->sh_type != SHT_NOBITS)
3573 offset += i_shdrp->sh_size;
3577 /* Compute the file positions we are going to put the sections at, and
3578 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3579 is not NULL, this is being called by the ELF backend linker. */
3582 _bfd_elf_compute_section_file_positions (bfd *abfd,
3583 struct bfd_link_info *link_info)
3585 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3586 struct fake_section_arg fsargs;
3588 struct bfd_strtab_hash *strtab = NULL;
3589 Elf_Internal_Shdr *shstrtab_hdr;
3590 bfd_boolean need_symtab;
3592 if (abfd->output_has_begun)
3595 /* Do any elf backend specific processing first. */
3596 if (bed->elf_backend_begin_write_processing)
3597 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3599 if (! prep_headers (abfd))
3602 /* Post process the headers if necessary. */
3603 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3605 fsargs.failed = FALSE;
3606 fsargs.link_info = link_info;
3607 bfd_map_over_sections (abfd, elf_fake_sections, &fsargs);
3611 if (!assign_section_numbers (abfd, link_info))
3614 /* The backend linker builds symbol table information itself. */
3615 need_symtab = (link_info == NULL
3616 && (bfd_get_symcount (abfd) > 0
3617 || ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3621 /* Non-zero if doing a relocatable link. */
3622 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3624 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3629 if (link_info == NULL)
3631 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3636 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3637 /* sh_name was set in prep_headers. */
3638 shstrtab_hdr->sh_type = SHT_STRTAB;
3639 shstrtab_hdr->sh_flags = 0;
3640 shstrtab_hdr->sh_addr = 0;
3641 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3642 shstrtab_hdr->sh_entsize = 0;
3643 shstrtab_hdr->sh_link = 0;
3644 shstrtab_hdr->sh_info = 0;
3645 /* sh_offset is set in assign_file_positions_except_relocs. */
3646 shstrtab_hdr->sh_addralign = 1;
3648 if (!assign_file_positions_except_relocs (abfd, link_info))
3654 Elf_Internal_Shdr *hdr;
3656 off = elf_next_file_pos (abfd);
3658 hdr = &elf_tdata (abfd)->symtab_hdr;
3659 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3661 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3662 if (hdr->sh_size != 0)
3663 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3665 hdr = &elf_tdata (abfd)->strtab_hdr;
3666 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3668 elf_next_file_pos (abfd) = off;
3670 /* Now that we know where the .strtab section goes, write it
3672 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3673 || ! _bfd_stringtab_emit (abfd, strtab))
3675 _bfd_stringtab_free (strtab);
3678 abfd->output_has_begun = TRUE;
3683 /* Make an initial estimate of the size of the program header. If we
3684 get the number wrong here, we'll redo section placement. */
3686 static bfd_size_type
3687 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3691 const struct elf_backend_data *bed;
3693 /* Assume we will need exactly two PT_LOAD segments: one for text
3694 and one for data. */
3697 s = bfd_get_section_by_name (abfd, ".interp");
3698 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3700 /* If we have a loadable interpreter section, we need a
3701 PT_INTERP segment. In this case, assume we also need a
3702 PT_PHDR segment, although that may not be true for all
3707 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3709 /* We need a PT_DYNAMIC segment. */
3713 if (info != NULL && info->relro)
3715 /* We need a PT_GNU_RELRO segment. */
3719 if (elf_eh_frame_hdr (abfd))
3721 /* We need a PT_GNU_EH_FRAME segment. */
3725 if (elf_stack_flags (abfd))
3727 /* We need a PT_GNU_STACK segment. */
3731 for (s = abfd->sections; s != NULL; s = s->next)
3733 if ((s->flags & SEC_LOAD) != 0
3734 && CONST_STRNEQ (s->name, ".note"))
3736 /* We need a PT_NOTE segment. */
3738 /* Try to create just one PT_NOTE segment
3739 for all adjacent loadable .note* sections.
3740 gABI requires that within a PT_NOTE segment
3741 (and also inside of each SHT_NOTE section)
3742 each note is padded to a multiple of 4 size,
3743 so we check whether the sections are correctly
3745 if (s->alignment_power == 2)
3746 while (s->next != NULL
3747 && s->next->alignment_power == 2
3748 && (s->next->flags & SEC_LOAD) != 0
3749 && CONST_STRNEQ (s->next->name, ".note"))
3754 for (s = abfd->sections; s != NULL; s = s->next)
3756 if (s->flags & SEC_THREAD_LOCAL)
3758 /* We need a PT_TLS segment. */
3764 /* Let the backend count up any program headers it might need. */
3765 bed = get_elf_backend_data (abfd);
3766 if (bed->elf_backend_additional_program_headers)
3770 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3776 return segs * bed->s->sizeof_phdr;
3779 /* Find the segment that contains the output_section of section. */
3782 _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section)
3784 struct elf_segment_map *m;
3785 Elf_Internal_Phdr *p;
3787 for (m = elf_seg_map (abfd), p = elf_tdata (abfd)->phdr;
3793 for (i = m->count - 1; i >= 0; i--)
3794 if (m->sections[i] == section)
3801 /* Create a mapping from a set of sections to a program segment. */
3803 static struct elf_segment_map *
3804 make_mapping (bfd *abfd,
3805 asection **sections,
3810 struct elf_segment_map *m;
3815 amt = sizeof (struct elf_segment_map);
3816 amt += (to - from - 1) * sizeof (asection *);
3817 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3821 m->p_type = PT_LOAD;
3822 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3823 m->sections[i - from] = *hdrpp;
3824 m->count = to - from;
3826 if (from == 0 && phdr)
3828 /* Include the headers in the first PT_LOAD segment. */
3829 m->includes_filehdr = 1;
3830 m->includes_phdrs = 1;
3836 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3839 struct elf_segment_map *
3840 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3842 struct elf_segment_map *m;
3844 m = (struct elf_segment_map *) bfd_zalloc (abfd,
3845 sizeof (struct elf_segment_map));
3849 m->p_type = PT_DYNAMIC;
3851 m->sections[0] = dynsec;
3856 /* Possibly add or remove segments from the segment map. */
3859 elf_modify_segment_map (bfd *abfd,
3860 struct bfd_link_info *info,
3861 bfd_boolean remove_empty_load)
3863 struct elf_segment_map **m;
3864 const struct elf_backend_data *bed;
3866 /* The placement algorithm assumes that non allocated sections are
3867 not in PT_LOAD segments. We ensure this here by removing such
3868 sections from the segment map. We also remove excluded
3869 sections. Finally, any PT_LOAD segment without sections is
3871 m = &elf_seg_map (abfd);
3874 unsigned int i, new_count;
3876 for (new_count = 0, i = 0; i < (*m)->count; i++)
3878 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3879 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3880 || (*m)->p_type != PT_LOAD))
3882 (*m)->sections[new_count] = (*m)->sections[i];
3886 (*m)->count = new_count;
3888 if (remove_empty_load && (*m)->p_type == PT_LOAD && (*m)->count == 0)
3894 bed = get_elf_backend_data (abfd);
3895 if (bed->elf_backend_modify_segment_map != NULL)
3897 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3904 /* Set up a mapping from BFD sections to program segments. */
3907 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3910 struct elf_segment_map *m;
3911 asection **sections = NULL;
3912 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3913 bfd_boolean no_user_phdrs;
3915 no_user_phdrs = elf_seg_map (abfd) == NULL;
3918 info->user_phdrs = !no_user_phdrs;
3920 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
3924 struct elf_segment_map *mfirst;
3925 struct elf_segment_map **pm;
3928 unsigned int phdr_index;
3929 bfd_vma maxpagesize;
3931 bfd_boolean phdr_in_segment = TRUE;
3932 bfd_boolean writable;
3934 asection *first_tls = NULL;
3935 asection *dynsec, *eh_frame_hdr;
3937 bfd_vma addr_mask, wrap_to = 0;
3939 /* Select the allocated sections, and sort them. */
3941 sections = (asection **) bfd_malloc2 (bfd_count_sections (abfd),
3942 sizeof (asection *));
3943 if (sections == NULL)
3946 /* Calculate top address, avoiding undefined behaviour of shift
3947 left operator when shift count is equal to size of type
3949 addr_mask = ((bfd_vma) 1 << (bfd_arch_bits_per_address (abfd) - 1)) - 1;
3950 addr_mask = (addr_mask << 1) + 1;
3953 for (s = abfd->sections; s != NULL; s = s->next)
3955 if ((s->flags & SEC_ALLOC) != 0)
3959 /* A wrapping section potentially clashes with header. */
3960 if (((s->lma + s->size) & addr_mask) < (s->lma & addr_mask))
3961 wrap_to = (s->lma + s->size) & addr_mask;
3964 BFD_ASSERT (i <= bfd_count_sections (abfd));
3967 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3969 /* Build the mapping. */
3974 /* If we have a .interp section, then create a PT_PHDR segment for
3975 the program headers and a PT_INTERP segment for the .interp
3977 s = bfd_get_section_by_name (abfd, ".interp");
3978 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3980 amt = sizeof (struct elf_segment_map);
3981 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3985 m->p_type = PT_PHDR;
3986 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3987 m->p_flags = PF_R | PF_X;
3988 m->p_flags_valid = 1;
3989 m->includes_phdrs = 1;
3994 amt = sizeof (struct elf_segment_map);
3995 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3999 m->p_type = PT_INTERP;
4007 /* Look through the sections. We put sections in the same program
4008 segment when the start of the second section can be placed within
4009 a few bytes of the end of the first section. */
4013 maxpagesize = bed->maxpagesize;
4014 /* PR 17512: file: c8455299.
4015 Avoid divide-by-zero errors later on.
4016 FIXME: Should we abort if the maxpagesize is zero ? */
4017 if (maxpagesize == 0)
4020 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
4022 && (dynsec->flags & SEC_LOAD) == 0)
4025 /* Deal with -Ttext or something similar such that the first section
4026 is not adjacent to the program headers. This is an
4027 approximation, since at this point we don't know exactly how many
4028 program headers we will need. */
4031 bfd_size_type phdr_size = elf_program_header_size (abfd);
4033 if (phdr_size == (bfd_size_type) -1)
4034 phdr_size = get_program_header_size (abfd, info);
4035 phdr_size += bed->s->sizeof_ehdr;
4036 if ((abfd->flags & D_PAGED) == 0
4037 || (sections[0]->lma & addr_mask) < phdr_size
4038 || ((sections[0]->lma & addr_mask) % maxpagesize
4039 < phdr_size % maxpagesize)
4040 || (sections[0]->lma & addr_mask & -maxpagesize) < wrap_to)
4041 phdr_in_segment = FALSE;
4044 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
4047 bfd_boolean new_segment;
4051 /* See if this section and the last one will fit in the same
4054 if (last_hdr == NULL)
4056 /* If we don't have a segment yet, then we don't need a new
4057 one (we build the last one after this loop). */
4058 new_segment = FALSE;
4060 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
4062 /* If this section has a different relation between the
4063 virtual address and the load address, then we need a new
4067 else if (hdr->lma < last_hdr->lma + last_size
4068 || last_hdr->lma + last_size < last_hdr->lma)
4070 /* If this section has a load address that makes it overlap
4071 the previous section, then we need a new segment. */
4074 /* In the next test we have to be careful when last_hdr->lma is close
4075 to the end of the address space. If the aligned address wraps
4076 around to the start of the address space, then there are no more
4077 pages left in memory and it is OK to assume that the current
4078 section can be included in the current segment. */
4079 else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
4081 && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
4084 /* If putting this section in this segment would force us to
4085 skip a page in the segment, then we need a new segment. */
4088 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
4089 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
4091 /* We don't want to put a loadable section after a
4092 nonloadable section in the same segment.
4093 Consider .tbss sections as loadable for this purpose. */
4096 else if ((abfd->flags & D_PAGED) == 0)
4098 /* If the file is not demand paged, which means that we
4099 don't require the sections to be correctly aligned in the
4100 file, then there is no other reason for a new segment. */
4101 new_segment = FALSE;
4104 && (hdr->flags & SEC_READONLY) == 0
4105 && (((last_hdr->lma + last_size - 1) & -maxpagesize)
4106 != (hdr->lma & -maxpagesize)))
4108 /* We don't want to put a writable section in a read only
4109 segment, unless they are on the same page in memory
4110 anyhow. We already know that the last section does not
4111 bring us past the current section on the page, so the
4112 only case in which the new section is not on the same
4113 page as the previous section is when the previous section
4114 ends precisely on a page boundary. */
4119 /* Otherwise, we can use the same segment. */
4120 new_segment = FALSE;
4123 /* Allow interested parties a chance to override our decision. */
4124 if (last_hdr != NULL
4126 && info->callbacks->override_segment_assignment != NULL)
4128 = info->callbacks->override_segment_assignment (info, abfd, hdr,
4134 if ((hdr->flags & SEC_READONLY) == 0)
4137 /* .tbss sections effectively have zero size. */
4138 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4139 != SEC_THREAD_LOCAL)
4140 last_size = hdr->size;
4146 /* We need a new program segment. We must create a new program
4147 header holding all the sections from phdr_index until hdr. */
4149 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4156 if ((hdr->flags & SEC_READONLY) == 0)
4162 /* .tbss sections effectively have zero size. */
4163 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
4164 last_size = hdr->size;
4168 phdr_in_segment = FALSE;
4171 /* Create a final PT_LOAD program segment, but not if it's just
4173 if (last_hdr != NULL
4174 && (i - phdr_index != 1
4175 || ((last_hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4176 != SEC_THREAD_LOCAL)))
4178 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4186 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
4189 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
4196 /* For each batch of consecutive loadable .note sections,
4197 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
4198 because if we link together nonloadable .note sections and
4199 loadable .note sections, we will generate two .note sections
4200 in the output file. FIXME: Using names for section types is
4202 for (s = abfd->sections; s != NULL; s = s->next)
4204 if ((s->flags & SEC_LOAD) != 0
4205 && CONST_STRNEQ (s->name, ".note"))
4210 amt = sizeof (struct elf_segment_map);
4211 if (s->alignment_power == 2)
4212 for (s2 = s; s2->next != NULL; s2 = s2->next)
4214 if (s2->next->alignment_power == 2
4215 && (s2->next->flags & SEC_LOAD) != 0
4216 && CONST_STRNEQ (s2->next->name, ".note")
4217 && align_power (s2->lma + s2->size, 2)
4223 amt += (count - 1) * sizeof (asection *);
4224 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4228 m->p_type = PT_NOTE;
4232 m->sections[m->count - count--] = s;
4233 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4236 m->sections[m->count - 1] = s;
4237 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4241 if (s->flags & SEC_THREAD_LOCAL)
4249 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
4252 amt = sizeof (struct elf_segment_map);
4253 amt += (tls_count - 1) * sizeof (asection *);
4254 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4259 m->count = tls_count;
4260 /* Mandated PF_R. */
4262 m->p_flags_valid = 1;
4264 for (i = 0; i < (unsigned int) tls_count; ++i)
4266 if ((s->flags & SEC_THREAD_LOCAL) == 0)
4269 (_("%B: TLS sections are not adjacent:"), abfd);
4272 while (i < (unsigned int) tls_count)
4274 if ((s->flags & SEC_THREAD_LOCAL) != 0)
4276 _bfd_error_handler (_(" TLS: %A"), s);
4280 _bfd_error_handler (_(" non-TLS: %A"), s);
4283 bfd_set_error (bfd_error_bad_value);
4294 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
4296 eh_frame_hdr = elf_eh_frame_hdr (abfd);
4297 if (eh_frame_hdr != NULL
4298 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
4300 amt = sizeof (struct elf_segment_map);
4301 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4305 m->p_type = PT_GNU_EH_FRAME;
4307 m->sections[0] = eh_frame_hdr->output_section;
4313 if (elf_stack_flags (abfd))
4315 amt = sizeof (struct elf_segment_map);
4316 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4320 m->p_type = PT_GNU_STACK;
4321 m->p_flags = elf_stack_flags (abfd);
4322 m->p_align = bed->stack_align;
4323 m->p_flags_valid = 1;
4324 m->p_align_valid = m->p_align != 0;
4325 if (info->stacksize > 0)
4327 m->p_size = info->stacksize;
4328 m->p_size_valid = 1;
4335 if (info != NULL && info->relro)
4337 for (m = mfirst; m != NULL; m = m->next)
4339 if (m->p_type == PT_LOAD
4341 && m->sections[0]->vma >= info->relro_start
4342 && m->sections[0]->vma < info->relro_end)
4345 while (--i != (unsigned) -1)
4346 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS))
4347 == (SEC_LOAD | SEC_HAS_CONTENTS))
4350 if (i != (unsigned) -1)
4355 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
4358 amt = sizeof (struct elf_segment_map);
4359 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4363 m->p_type = PT_GNU_RELRO;
4365 m->p_flags_valid = 1;
4373 elf_seg_map (abfd) = mfirst;
4376 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
4379 for (count = 0, m = elf_seg_map (abfd); m != NULL; m = m->next)
4381 elf_program_header_size (abfd) = count * bed->s->sizeof_phdr;
4386 if (sections != NULL)
4391 /* Sort sections by address. */
4394 elf_sort_sections (const void *arg1, const void *arg2)
4396 const asection *sec1 = *(const asection **) arg1;
4397 const asection *sec2 = *(const asection **) arg2;
4398 bfd_size_type size1, size2;
4400 /* Sort by LMA first, since this is the address used to
4401 place the section into a segment. */
4402 if (sec1->lma < sec2->lma)
4404 else if (sec1->lma > sec2->lma)
4407 /* Then sort by VMA. Normally the LMA and the VMA will be
4408 the same, and this will do nothing. */
4409 if (sec1->vma < sec2->vma)
4411 else if (sec1->vma > sec2->vma)
4414 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
4416 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
4422 /* If the indicies are the same, do not return 0
4423 here, but continue to try the next comparison. */
4424 if (sec1->target_index - sec2->target_index != 0)
4425 return sec1->target_index - sec2->target_index;
4430 else if (TOEND (sec2))
4435 /* Sort by size, to put zero sized sections
4436 before others at the same address. */
4438 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
4439 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
4446 return sec1->target_index - sec2->target_index;
4449 /* Ian Lance Taylor writes:
4451 We shouldn't be using % with a negative signed number. That's just
4452 not good. We have to make sure either that the number is not
4453 negative, or that the number has an unsigned type. When the types
4454 are all the same size they wind up as unsigned. When file_ptr is a
4455 larger signed type, the arithmetic winds up as signed long long,
4458 What we're trying to say here is something like ``increase OFF by
4459 the least amount that will cause it to be equal to the VMA modulo
4461 /* In other words, something like:
4463 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4464 off_offset = off % bed->maxpagesize;
4465 if (vma_offset < off_offset)
4466 adjustment = vma_offset + bed->maxpagesize - off_offset;
4468 adjustment = vma_offset - off_offset;
4470 which can can be collapsed into the expression below. */
4473 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4475 /* PR binutils/16199: Handle an alignment of zero. */
4476 if (maxpagesize == 0)
4478 return ((vma - off) % maxpagesize);
4482 print_segment_map (const struct elf_segment_map *m)
4485 const char *pt = get_segment_type (m->p_type);
4490 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
4491 sprintf (buf, "LOPROC+%7.7x",
4492 (unsigned int) (m->p_type - PT_LOPROC));
4493 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
4494 sprintf (buf, "LOOS+%7.7x",
4495 (unsigned int) (m->p_type - PT_LOOS));
4497 snprintf (buf, sizeof (buf), "%8.8x",
4498 (unsigned int) m->p_type);
4502 fprintf (stderr, "%s:", pt);
4503 for (j = 0; j < m->count; j++)
4504 fprintf (stderr, " %s", m->sections [j]->name);
4510 write_zeros (bfd *abfd, file_ptr pos, bfd_size_type len)
4515 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
4517 buf = bfd_zmalloc (len);
4520 ret = bfd_bwrite (buf, len, abfd) == len;
4525 /* Assign file positions to the sections based on the mapping from
4526 sections to segments. This function also sets up some fields in
4530 assign_file_positions_for_load_sections (bfd *abfd,
4531 struct bfd_link_info *link_info)
4533 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4534 struct elf_segment_map *m;
4535 Elf_Internal_Phdr *phdrs;
4536 Elf_Internal_Phdr *p;
4538 bfd_size_type maxpagesize;
4541 bfd_vma header_pad = 0;
4543 if (link_info == NULL
4544 && !_bfd_elf_map_sections_to_segments (abfd, link_info))
4548 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
4552 header_pad = m->header_size;
4557 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4558 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4562 /* PR binutils/12467. */
4563 elf_elfheader (abfd)->e_phoff = 0;
4564 elf_elfheader (abfd)->e_phentsize = 0;
4567 elf_elfheader (abfd)->e_phnum = alloc;
4569 if (elf_program_header_size (abfd) == (bfd_size_type) -1)
4570 elf_program_header_size (abfd) = alloc * bed->s->sizeof_phdr;
4572 BFD_ASSERT (elf_program_header_size (abfd)
4573 >= alloc * bed->s->sizeof_phdr);
4577 elf_next_file_pos (abfd) = bed->s->sizeof_ehdr;
4581 /* We're writing the size in elf_program_header_size (abfd),
4582 see assign_file_positions_except_relocs, so make sure we have
4583 that amount allocated, with trailing space cleared.
4584 The variable alloc contains the computed need, while
4585 elf_program_header_size (abfd) contains the size used for the
4587 See ld/emultempl/elf-generic.em:gld${EMULATION_NAME}_map_segments
4588 where the layout is forced to according to a larger size in the
4589 last iterations for the testcase ld-elf/header. */
4590 BFD_ASSERT (elf_program_header_size (abfd) % bed->s->sizeof_phdr
4592 phdrs = (Elf_Internal_Phdr *)
4594 (elf_program_header_size (abfd) / bed->s->sizeof_phdr),
4595 sizeof (Elf_Internal_Phdr));
4596 elf_tdata (abfd)->phdr = phdrs;
4601 if ((abfd->flags & D_PAGED) != 0)
4602 maxpagesize = bed->maxpagesize;
4604 off = bed->s->sizeof_ehdr;
4605 off += alloc * bed->s->sizeof_phdr;
4606 if (header_pad < (bfd_vma) off)
4612 for (m = elf_seg_map (abfd), p = phdrs, j = 0;
4614 m = m->next, p++, j++)
4618 bfd_boolean no_contents;
4620 /* If elf_segment_map is not from map_sections_to_segments, the
4621 sections may not be correctly ordered. NOTE: sorting should
4622 not be done to the PT_NOTE section of a corefile, which may
4623 contain several pseudo-sections artificially created by bfd.
4624 Sorting these pseudo-sections breaks things badly. */
4626 && !(elf_elfheader (abfd)->e_type == ET_CORE
4627 && m->p_type == PT_NOTE))
4628 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4631 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4632 number of sections with contents contributing to both p_filesz
4633 and p_memsz, followed by a number of sections with no contents
4634 that just contribute to p_memsz. In this loop, OFF tracks next
4635 available file offset for PT_LOAD and PT_NOTE segments. */
4636 p->p_type = m->p_type;
4637 p->p_flags = m->p_flags;
4642 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4644 if (m->p_paddr_valid)
4645 p->p_paddr = m->p_paddr;
4646 else if (m->count == 0)
4649 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
4651 if (p->p_type == PT_LOAD
4652 && (abfd->flags & D_PAGED) != 0)
4654 /* p_align in demand paged PT_LOAD segments effectively stores
4655 the maximum page size. When copying an executable with
4656 objcopy, we set m->p_align from the input file. Use this
4657 value for maxpagesize rather than bed->maxpagesize, which
4658 may be different. Note that we use maxpagesize for PT_TLS
4659 segment alignment later in this function, so we are relying
4660 on at least one PT_LOAD segment appearing before a PT_TLS
4662 if (m->p_align_valid)
4663 maxpagesize = m->p_align;
4665 p->p_align = maxpagesize;
4667 else if (m->p_align_valid)
4668 p->p_align = m->p_align;
4669 else if (m->count == 0)
4670 p->p_align = 1 << bed->s->log_file_align;
4674 no_contents = FALSE;
4676 if (p->p_type == PT_LOAD
4679 bfd_size_type align;
4680 unsigned int align_power = 0;
4682 if (m->p_align_valid)
4686 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4688 unsigned int secalign;
4690 secalign = bfd_get_section_alignment (abfd, *secpp);
4691 if (secalign > align_power)
4692 align_power = secalign;
4694 align = (bfd_size_type) 1 << align_power;
4695 if (align < maxpagesize)
4696 align = maxpagesize;
4699 for (i = 0; i < m->count; i++)
4700 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4701 /* If we aren't making room for this section, then
4702 it must be SHT_NOBITS regardless of what we've
4703 set via struct bfd_elf_special_section. */
4704 elf_section_type (m->sections[i]) = SHT_NOBITS;
4706 /* Find out whether this segment contains any loadable
4709 for (i = 0; i < m->count; i++)
4710 if (elf_section_type (m->sections[i]) != SHT_NOBITS)
4712 no_contents = FALSE;
4716 off_adjust = vma_page_aligned_bias (p->p_vaddr, off, align);
4720 /* We shouldn't need to align the segment on disk since
4721 the segment doesn't need file space, but the gABI
4722 arguably requires the alignment and glibc ld.so
4723 checks it. So to comply with the alignment
4724 requirement but not waste file space, we adjust
4725 p_offset for just this segment. (OFF_ADJUST is
4726 subtracted from OFF later.) This may put p_offset
4727 past the end of file, but that shouldn't matter. */
4732 /* Make sure the .dynamic section is the first section in the
4733 PT_DYNAMIC segment. */
4734 else if (p->p_type == PT_DYNAMIC
4736 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4739 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4741 bfd_set_error (bfd_error_bad_value);
4744 /* Set the note section type to SHT_NOTE. */
4745 else if (p->p_type == PT_NOTE)
4746 for (i = 0; i < m->count; i++)
4747 elf_section_type (m->sections[i]) = SHT_NOTE;
4753 if (m->includes_filehdr)
4755 if (!m->p_flags_valid)
4757 p->p_filesz = bed->s->sizeof_ehdr;
4758 p->p_memsz = bed->s->sizeof_ehdr;
4761 if (p->p_vaddr < (bfd_vma) off)
4763 (*_bfd_error_handler)
4764 (_("%B: Not enough room for program headers, try linking with -N"),
4766 bfd_set_error (bfd_error_bad_value);
4771 if (!m->p_paddr_valid)
4776 if (m->includes_phdrs)
4778 if (!m->p_flags_valid)
4781 if (!m->includes_filehdr)
4783 p->p_offset = bed->s->sizeof_ehdr;
4787 p->p_vaddr -= off - p->p_offset;
4788 if (!m->p_paddr_valid)
4789 p->p_paddr -= off - p->p_offset;
4793 p->p_filesz += alloc * bed->s->sizeof_phdr;
4794 p->p_memsz += alloc * bed->s->sizeof_phdr;
4797 p->p_filesz += header_pad;
4798 p->p_memsz += header_pad;
4802 if (p->p_type == PT_LOAD
4803 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4805 if (!m->includes_filehdr && !m->includes_phdrs)
4811 adjust = off - (p->p_offset + p->p_filesz);
4813 p->p_filesz += adjust;
4814 p->p_memsz += adjust;
4818 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4819 maps. Set filepos for sections in PT_LOAD segments, and in
4820 core files, for sections in PT_NOTE segments.
4821 assign_file_positions_for_non_load_sections will set filepos
4822 for other sections and update p_filesz for other segments. */
4823 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4826 bfd_size_type align;
4827 Elf_Internal_Shdr *this_hdr;
4830 this_hdr = &elf_section_data (sec)->this_hdr;
4831 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4833 if ((p->p_type == PT_LOAD
4834 || p->p_type == PT_TLS)
4835 && (this_hdr->sh_type != SHT_NOBITS
4836 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4837 && ((this_hdr->sh_flags & SHF_TLS) == 0
4838 || p->p_type == PT_TLS))))
4840 bfd_vma p_start = p->p_paddr;
4841 bfd_vma p_end = p_start + p->p_memsz;
4842 bfd_vma s_start = sec->lma;
4843 bfd_vma adjust = s_start - p_end;
4847 || p_end < p_start))
4849 (*_bfd_error_handler)
4850 (_("%B: section %A lma %#lx adjusted to %#lx"), abfd, sec,
4851 (unsigned long) s_start, (unsigned long) p_end);
4855 p->p_memsz += adjust;
4857 if (this_hdr->sh_type != SHT_NOBITS)
4859 if (p->p_filesz + adjust < p->p_memsz)
4861 /* We have a PROGBITS section following NOBITS ones.
4862 Allocate file space for the NOBITS section(s) and
4864 adjust = p->p_memsz - p->p_filesz;
4865 if (!write_zeros (abfd, off, adjust))
4869 p->p_filesz += adjust;
4873 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4875 /* The section at i == 0 is the one that actually contains
4879 this_hdr->sh_offset = sec->filepos = off;
4880 off += this_hdr->sh_size;
4881 p->p_filesz = this_hdr->sh_size;
4887 /* The rest are fake sections that shouldn't be written. */
4896 if (p->p_type == PT_LOAD)
4898 this_hdr->sh_offset = sec->filepos = off;
4899 if (this_hdr->sh_type != SHT_NOBITS)
4900 off += this_hdr->sh_size;
4902 else if (this_hdr->sh_type == SHT_NOBITS
4903 && (this_hdr->sh_flags & SHF_TLS) != 0
4904 && this_hdr->sh_offset == 0)
4906 /* This is a .tbss section that didn't get a PT_LOAD.
4907 (See _bfd_elf_map_sections_to_segments "Create a
4908 final PT_LOAD".) Set sh_offset to the value it
4909 would have if we had created a zero p_filesz and
4910 p_memsz PT_LOAD header for the section. This
4911 also makes the PT_TLS header have the same
4913 bfd_vma adjust = vma_page_aligned_bias (this_hdr->sh_addr,
4915 this_hdr->sh_offset = sec->filepos = off + adjust;
4918 if (this_hdr->sh_type != SHT_NOBITS)
4920 p->p_filesz += this_hdr->sh_size;
4921 /* A load section without SHF_ALLOC is something like
4922 a note section in a PT_NOTE segment. These take
4923 file space but are not loaded into memory. */
4924 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4925 p->p_memsz += this_hdr->sh_size;
4927 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4929 if (p->p_type == PT_TLS)
4930 p->p_memsz += this_hdr->sh_size;
4932 /* .tbss is special. It doesn't contribute to p_memsz of
4934 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
4935 p->p_memsz += this_hdr->sh_size;
4938 if (align > p->p_align
4939 && !m->p_align_valid
4940 && (p->p_type != PT_LOAD
4941 || (abfd->flags & D_PAGED) == 0))
4945 if (!m->p_flags_valid)
4948 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4950 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4957 /* Check that all sections are in a PT_LOAD segment.
4958 Don't check funky gdb generated core files. */
4959 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4961 bfd_boolean check_vma = TRUE;
4963 for (i = 1; i < m->count; i++)
4964 if (m->sections[i]->vma == m->sections[i - 1]->vma
4965 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i])
4966 ->this_hdr), p) != 0
4967 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i - 1])
4968 ->this_hdr), p) != 0)
4970 /* Looks like we have overlays packed into the segment. */
4975 for (i = 0; i < m->count; i++)
4977 Elf_Internal_Shdr *this_hdr;
4980 sec = m->sections[i];
4981 this_hdr = &(elf_section_data(sec)->this_hdr);
4982 if (!ELF_SECTION_IN_SEGMENT_1 (this_hdr, p, check_vma, 0)
4983 && !ELF_TBSS_SPECIAL (this_hdr, p))
4985 (*_bfd_error_handler)
4986 (_("%B: section `%A' can't be allocated in segment %d"),
4988 print_segment_map (m);
4994 elf_next_file_pos (abfd) = off;
4998 /* Assign file positions for the other sections. */
5001 assign_file_positions_for_non_load_sections (bfd *abfd,
5002 struct bfd_link_info *link_info)
5004 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5005 Elf_Internal_Shdr **i_shdrpp;
5006 Elf_Internal_Shdr **hdrpp;
5007 Elf_Internal_Phdr *phdrs;
5008 Elf_Internal_Phdr *p;
5009 struct elf_segment_map *m;
5010 struct elf_segment_map *hdrs_segment;
5011 bfd_vma filehdr_vaddr, filehdr_paddr;
5012 bfd_vma phdrs_vaddr, phdrs_paddr;
5014 unsigned int num_sec;
5018 i_shdrpp = elf_elfsections (abfd);
5019 num_sec = elf_numsections (abfd);
5020 off = elf_next_file_pos (abfd);
5021 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
5023 Elf_Internal_Shdr *hdr;
5026 if (hdr->bfd_section != NULL
5027 && (hdr->bfd_section->filepos != 0
5028 || (hdr->sh_type == SHT_NOBITS
5029 && hdr->contents == NULL)))
5030 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
5031 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
5033 if (hdr->sh_size != 0)
5034 (*_bfd_error_handler)
5035 (_("%B: warning: allocated section `%s' not in segment"),
5037 (hdr->bfd_section == NULL
5039 : hdr->bfd_section->name));
5040 /* We don't need to page align empty sections. */
5041 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
5042 off += vma_page_aligned_bias (hdr->sh_addr, off,
5045 off += vma_page_aligned_bias (hdr->sh_addr, off,
5047 off = _bfd_elf_assign_file_position_for_section (hdr, off,
5050 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
5051 && hdr->bfd_section == NULL)
5052 || hdr == i_shdrpp[elf_onesymtab (abfd)]
5053 || hdr == i_shdrpp[elf_symtab_shndx (abfd)]
5054 || hdr == i_shdrpp[elf_strtab_sec (abfd)])
5055 hdr->sh_offset = -1;
5057 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
5060 /* Now that we have set the section file positions, we can set up
5061 the file positions for the non PT_LOAD segments. */
5065 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
5067 hdrs_segment = NULL;
5068 phdrs = elf_tdata (abfd)->phdr;
5069 for (m = elf_seg_map (abfd), p = phdrs; m != NULL; m = m->next, p++)
5072 if (p->p_type != PT_LOAD)
5075 if (m->includes_filehdr)
5077 filehdr_vaddr = p->p_vaddr;
5078 filehdr_paddr = p->p_paddr;
5080 if (m->includes_phdrs)
5082 phdrs_vaddr = p->p_vaddr;
5083 phdrs_paddr = p->p_paddr;
5084 if (m->includes_filehdr)
5087 phdrs_vaddr += bed->s->sizeof_ehdr;
5088 phdrs_paddr += bed->s->sizeof_ehdr;
5093 if (hdrs_segment != NULL && link_info != NULL)
5095 /* There is a segment that contains both the file headers and the
5096 program headers, so provide a symbol __ehdr_start pointing there.
5097 A program can use this to examine itself robustly. */
5099 struct elf_link_hash_entry *hash
5100 = elf_link_hash_lookup (elf_hash_table (link_info), "__ehdr_start",
5101 FALSE, FALSE, TRUE);
5102 /* If the symbol was referenced and not defined, define it. */
5104 && (hash->root.type == bfd_link_hash_new
5105 || hash->root.type == bfd_link_hash_undefined
5106 || hash->root.type == bfd_link_hash_undefweak
5107 || hash->root.type == bfd_link_hash_common))
5110 if (hdrs_segment->count != 0)
5111 /* The segment contains sections, so use the first one. */
5112 s = hdrs_segment->sections[0];
5114 /* Use the first (i.e. lowest-addressed) section in any segment. */
5115 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
5124 hash->root.u.def.value = filehdr_vaddr - s->vma;
5125 hash->root.u.def.section = s;
5129 hash->root.u.def.value = filehdr_vaddr;
5130 hash->root.u.def.section = bfd_abs_section_ptr;
5133 hash->root.type = bfd_link_hash_defined;
5134 hash->def_regular = 1;
5139 for (m = elf_seg_map (abfd), p = phdrs; m != NULL; m = m->next, p++)
5141 if (p->p_type == PT_GNU_RELRO)
5143 const Elf_Internal_Phdr *lp;
5144 struct elf_segment_map *lm;
5146 if (link_info != NULL)
5148 /* During linking the range of the RELRO segment is passed
5150 for (lm = elf_seg_map (abfd), lp = phdrs;
5152 lm = lm->next, lp++)
5154 if (lp->p_type == PT_LOAD
5155 && lp->p_vaddr < link_info->relro_end
5157 && lm->sections[0]->vma >= link_info->relro_start)
5161 BFD_ASSERT (lm != NULL);
5165 /* Otherwise we are copying an executable or shared
5166 library, but we need to use the same linker logic. */
5167 for (lp = phdrs; lp < phdrs + count; ++lp)
5169 if (lp->p_type == PT_LOAD
5170 && lp->p_paddr == p->p_paddr)
5175 if (lp < phdrs + count)
5177 p->p_vaddr = lp->p_vaddr;
5178 p->p_paddr = lp->p_paddr;
5179 p->p_offset = lp->p_offset;
5180 if (link_info != NULL)
5181 p->p_filesz = link_info->relro_end - lp->p_vaddr;
5182 else if (m->p_size_valid)
5183 p->p_filesz = m->p_size;
5186 p->p_memsz = p->p_filesz;
5187 /* Preserve the alignment and flags if they are valid. The
5188 gold linker generates RW/4 for the PT_GNU_RELRO section.
5189 It is better for objcopy/strip to honor these attributes
5190 otherwise gdb will choke when using separate debug files.
5192 if (!m->p_align_valid)
5194 if (!m->p_flags_valid)
5195 p->p_flags = (lp->p_flags & ~PF_W);
5199 memset (p, 0, sizeof *p);
5200 p->p_type = PT_NULL;
5203 else if (p->p_type == PT_GNU_STACK)
5205 if (m->p_size_valid)
5206 p->p_memsz = m->p_size;
5208 else if (m->count != 0)
5210 if (p->p_type != PT_LOAD
5211 && (p->p_type != PT_NOTE
5212 || bfd_get_format (abfd) != bfd_core))
5214 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
5217 p->p_offset = m->sections[0]->filepos;
5218 for (i = m->count; i-- != 0;)
5220 asection *sect = m->sections[i];
5221 Elf_Internal_Shdr *hdr = &elf_section_data (sect)->this_hdr;
5222 if (hdr->sh_type != SHT_NOBITS)
5224 p->p_filesz = (sect->filepos - m->sections[0]->filepos
5231 else if (m->includes_filehdr)
5233 p->p_vaddr = filehdr_vaddr;
5234 if (! m->p_paddr_valid)
5235 p->p_paddr = filehdr_paddr;
5237 else if (m->includes_phdrs)
5239 p->p_vaddr = phdrs_vaddr;
5240 if (! m->p_paddr_valid)
5241 p->p_paddr = phdrs_paddr;
5245 elf_next_file_pos (abfd) = off;
5250 /* Work out the file positions of all the sections. This is called by
5251 _bfd_elf_compute_section_file_positions. All the section sizes and
5252 VMAs must be known before this is called.
5254 Reloc sections come in two flavours: Those processed specially as
5255 "side-channel" data attached to a section to which they apply, and
5256 those that bfd doesn't process as relocations. The latter sort are
5257 stored in a normal bfd section by bfd_section_from_shdr. We don't
5258 consider the former sort here, unless they form part of the loadable
5259 image. Reloc sections not assigned here will be handled later by
5260 assign_file_positions_for_relocs.
5262 We also don't set the positions of the .symtab and .strtab here. */
5265 assign_file_positions_except_relocs (bfd *abfd,
5266 struct bfd_link_info *link_info)
5268 struct elf_obj_tdata *tdata = elf_tdata (abfd);
5269 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5270 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5272 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
5273 && bfd_get_format (abfd) != bfd_core)
5275 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
5276 unsigned int num_sec = elf_numsections (abfd);
5277 Elf_Internal_Shdr **hdrpp;
5281 /* Start after the ELF header. */
5282 off = i_ehdrp->e_ehsize;
5284 /* We are not creating an executable, which means that we are
5285 not creating a program header, and that the actual order of
5286 the sections in the file is unimportant. */
5287 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
5289 Elf_Internal_Shdr *hdr;
5292 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
5293 && hdr->bfd_section == NULL)
5294 || i == elf_onesymtab (abfd)
5295 || i == elf_symtab_shndx (abfd)
5296 || i == elf_strtab_sec (abfd))
5298 hdr->sh_offset = -1;
5301 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
5304 elf_next_file_pos (abfd) = off;
5310 /* Assign file positions for the loaded sections based on the
5311 assignment of sections to segments. */
5312 if (!assign_file_positions_for_load_sections (abfd, link_info))
5315 /* And for non-load sections. */
5316 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
5319 if (bed->elf_backend_modify_program_headers != NULL)
5321 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
5325 /* Set e_type in ELF header to ET_EXEC for -pie -Ttext-segment=. */
5326 if (link_info != NULL
5327 && link_info->executable
5328 && link_info->shared)
5330 unsigned int num_segments = elf_elfheader (abfd)->e_phnum;
5331 Elf_Internal_Phdr *segment = elf_tdata (abfd)->phdr;
5332 Elf_Internal_Phdr *end_segment = &segment[num_segments];
5334 /* Find the lowest p_vaddr in PT_LOAD segments. */
5335 bfd_vma p_vaddr = (bfd_vma) -1;
5336 for (; segment < end_segment; segment++)
5337 if (segment->p_type == PT_LOAD && p_vaddr > segment->p_vaddr)
5338 p_vaddr = segment->p_vaddr;
5340 /* Set e_type to ET_EXEC if the lowest p_vaddr in PT_LOAD
5341 segments is non-zero. */
5343 i_ehdrp->e_type = ET_EXEC;
5346 /* Write out the program headers. */
5347 alloc = elf_program_header_size (abfd) / bed->s->sizeof_phdr;
5348 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
5349 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
5357 prep_headers (bfd *abfd)
5359 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form. */
5360 struct elf_strtab_hash *shstrtab;
5361 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5363 i_ehdrp = elf_elfheader (abfd);
5365 shstrtab = _bfd_elf_strtab_init ();
5366 if (shstrtab == NULL)
5369 elf_shstrtab (abfd) = shstrtab;
5371 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
5372 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
5373 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
5374 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
5376 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
5377 i_ehdrp->e_ident[EI_DATA] =
5378 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
5379 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
5381 if ((abfd->flags & DYNAMIC) != 0)
5382 i_ehdrp->e_type = ET_DYN;
5383 else if ((abfd->flags & EXEC_P) != 0)
5384 i_ehdrp->e_type = ET_EXEC;
5385 else if (bfd_get_format (abfd) == bfd_core)
5386 i_ehdrp->e_type = ET_CORE;
5388 i_ehdrp->e_type = ET_REL;
5390 switch (bfd_get_arch (abfd))
5392 case bfd_arch_unknown:
5393 i_ehdrp->e_machine = EM_NONE;
5396 /* There used to be a long list of cases here, each one setting
5397 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
5398 in the corresponding bfd definition. To avoid duplication,
5399 the switch was removed. Machines that need special handling
5400 can generally do it in elf_backend_final_write_processing(),
5401 unless they need the information earlier than the final write.
5402 Such need can generally be supplied by replacing the tests for
5403 e_machine with the conditions used to determine it. */
5405 i_ehdrp->e_machine = bed->elf_machine_code;
5408 i_ehdrp->e_version = bed->s->ev_current;
5409 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
5411 /* No program header, for now. */
5412 i_ehdrp->e_phoff = 0;
5413 i_ehdrp->e_phentsize = 0;
5414 i_ehdrp->e_phnum = 0;
5416 /* Each bfd section is section header entry. */
5417 i_ehdrp->e_entry = bfd_get_start_address (abfd);
5418 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
5420 /* If we're building an executable, we'll need a program header table. */
5421 if (abfd->flags & EXEC_P)
5422 /* It all happens later. */
5426 i_ehdrp->e_phentsize = 0;
5427 i_ehdrp->e_phoff = 0;
5430 elf_tdata (abfd)->symtab_hdr.sh_name =
5431 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
5432 elf_tdata (abfd)->strtab_hdr.sh_name =
5433 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
5434 elf_tdata (abfd)->shstrtab_hdr.sh_name =
5435 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
5436 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
5437 || elf_tdata (abfd)->strtab_hdr.sh_name == (unsigned int) -1
5438 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
5444 /* Assign file positions for all the reloc sections which are not part
5445 of the loadable file image, and the file position of section headers. */
5448 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
5451 unsigned int i, num_sec;
5452 Elf_Internal_Shdr **shdrpp;
5453 Elf_Internal_Ehdr *i_ehdrp;
5454 const struct elf_backend_data *bed;
5456 off = elf_next_file_pos (abfd);
5458 num_sec = elf_numsections (abfd);
5459 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
5461 Elf_Internal_Shdr *shdrp;
5464 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
5465 && shdrp->sh_offset == -1)
5466 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
5469 /* Place the section headers. */
5470 i_ehdrp = elf_elfheader (abfd);
5471 bed = get_elf_backend_data (abfd);
5472 off = align_file_position (off, 1 << bed->s->log_file_align);
5473 i_ehdrp->e_shoff = off;
5474 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
5475 elf_next_file_pos (abfd) = off;
5479 _bfd_elf_write_object_contents (bfd *abfd)
5481 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5482 Elf_Internal_Shdr **i_shdrp;
5484 unsigned int count, num_sec;
5485 struct elf_obj_tdata *t;
5487 if (! abfd->output_has_begun
5488 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
5491 i_shdrp = elf_elfsections (abfd);
5494 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
5498 _bfd_elf_assign_file_positions_for_relocs (abfd);
5500 /* After writing the headers, we need to write the sections too... */
5501 num_sec = elf_numsections (abfd);
5502 for (count = 1; count < num_sec; count++)
5504 if (bed->elf_backend_section_processing)
5505 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
5506 if (i_shdrp[count]->contents)
5508 bfd_size_type amt = i_shdrp[count]->sh_size;
5510 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
5511 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
5516 /* Write out the section header names. */
5517 t = elf_tdata (abfd);
5518 if (elf_shstrtab (abfd) != NULL
5519 && (bfd_seek (abfd, t->shstrtab_hdr.sh_offset, SEEK_SET) != 0
5520 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
5523 if (bed->elf_backend_final_write_processing)
5524 (*bed->elf_backend_final_write_processing) (abfd, elf_linker (abfd));
5526 if (!bed->s->write_shdrs_and_ehdr (abfd))
5529 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
5530 if (t->o->build_id.after_write_object_contents != NULL)
5531 return (*t->o->build_id.after_write_object_contents) (abfd);
5537 _bfd_elf_write_corefile_contents (bfd *abfd)
5539 /* Hopefully this can be done just like an object file. */
5540 return _bfd_elf_write_object_contents (abfd);
5543 /* Given a section, search the header to find them. */
5546 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
5548 const struct elf_backend_data *bed;
5549 unsigned int sec_index;
5551 if (elf_section_data (asect) != NULL
5552 && elf_section_data (asect)->this_idx != 0)
5553 return elf_section_data (asect)->this_idx;
5555 if (bfd_is_abs_section (asect))
5556 sec_index = SHN_ABS;
5557 else if (bfd_is_com_section (asect))
5558 sec_index = SHN_COMMON;
5559 else if (bfd_is_und_section (asect))
5560 sec_index = SHN_UNDEF;
5562 sec_index = SHN_BAD;
5564 bed = get_elf_backend_data (abfd);
5565 if (bed->elf_backend_section_from_bfd_section)
5567 int retval = sec_index;
5569 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
5573 if (sec_index == SHN_BAD)
5574 bfd_set_error (bfd_error_nonrepresentable_section);
5579 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5583 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5585 asymbol *asym_ptr = *asym_ptr_ptr;
5587 flagword flags = asym_ptr->flags;
5589 /* When gas creates relocations against local labels, it creates its
5590 own symbol for the section, but does put the symbol into the
5591 symbol chain, so udata is 0. When the linker is generating
5592 relocatable output, this section symbol may be for one of the
5593 input sections rather than the output section. */
5594 if (asym_ptr->udata.i == 0
5595 && (flags & BSF_SECTION_SYM)
5596 && asym_ptr->section)
5601 sec = asym_ptr->section;
5602 if (sec->owner != abfd && sec->output_section != NULL)
5603 sec = sec->output_section;
5604 if (sec->owner == abfd
5605 && (indx = sec->index) < elf_num_section_syms (abfd)
5606 && elf_section_syms (abfd)[indx] != NULL)
5607 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5610 idx = asym_ptr->udata.i;
5614 /* This case can occur when using --strip-symbol on a symbol
5615 which is used in a relocation entry. */
5616 (*_bfd_error_handler)
5617 (_("%B: symbol `%s' required but not present"),
5618 abfd, bfd_asymbol_name (asym_ptr));
5619 bfd_set_error (bfd_error_no_symbols);
5626 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx\n",
5627 (long) asym_ptr, asym_ptr->name, idx, (long) flags);
5635 /* Rewrite program header information. */
5638 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
5640 Elf_Internal_Ehdr *iehdr;
5641 struct elf_segment_map *map;
5642 struct elf_segment_map *map_first;
5643 struct elf_segment_map **pointer_to_map;
5644 Elf_Internal_Phdr *segment;
5647 unsigned int num_segments;
5648 bfd_boolean phdr_included = FALSE;
5649 bfd_boolean p_paddr_valid;
5650 bfd_vma maxpagesize;
5651 struct elf_segment_map *phdr_adjust_seg = NULL;
5652 unsigned int phdr_adjust_num = 0;
5653 const struct elf_backend_data *bed;
5655 bed = get_elf_backend_data (ibfd);
5656 iehdr = elf_elfheader (ibfd);
5659 pointer_to_map = &map_first;
5661 num_segments = elf_elfheader (ibfd)->e_phnum;
5662 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5664 /* Returns the end address of the segment + 1. */
5665 #define SEGMENT_END(segment, start) \
5666 (start + (segment->p_memsz > segment->p_filesz \
5667 ? segment->p_memsz : segment->p_filesz))
5669 #define SECTION_SIZE(section, segment) \
5670 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5671 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5672 ? section->size : 0)
5674 /* Returns TRUE if the given section is contained within
5675 the given segment. VMA addresses are compared. */
5676 #define IS_CONTAINED_BY_VMA(section, segment) \
5677 (section->vma >= segment->p_vaddr \
5678 && (section->vma + SECTION_SIZE (section, segment) \
5679 <= (SEGMENT_END (segment, segment->p_vaddr))))
5681 /* Returns TRUE if the given section is contained within
5682 the given segment. LMA addresses are compared. */
5683 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5684 (section->lma >= base \
5685 && (section->lma + SECTION_SIZE (section, segment) \
5686 <= SEGMENT_END (segment, base)))
5688 /* Handle PT_NOTE segment. */
5689 #define IS_NOTE(p, s) \
5690 (p->p_type == PT_NOTE \
5691 && elf_section_type (s) == SHT_NOTE \
5692 && (bfd_vma) s->filepos >= p->p_offset \
5693 && ((bfd_vma) s->filepos + s->size \
5694 <= p->p_offset + p->p_filesz))
5696 /* Special case: corefile "NOTE" section containing regs, prpsinfo
5698 #define IS_COREFILE_NOTE(p, s) \
5700 && bfd_get_format (ibfd) == bfd_core \
5704 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5705 linker, which generates a PT_INTERP section with p_vaddr and
5706 p_memsz set to 0. */
5707 #define IS_SOLARIS_PT_INTERP(p, s) \
5709 && p->p_paddr == 0 \
5710 && p->p_memsz == 0 \
5711 && p->p_filesz > 0 \
5712 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5714 && (bfd_vma) s->filepos >= p->p_offset \
5715 && ((bfd_vma) s->filepos + s->size \
5716 <= p->p_offset + p->p_filesz))
5718 /* Decide if the given section should be included in the given segment.
5719 A section will be included if:
5720 1. It is within the address space of the segment -- we use the LMA
5721 if that is set for the segment and the VMA otherwise,
5722 2. It is an allocated section or a NOTE section in a PT_NOTE
5724 3. There is an output section associated with it,
5725 4. The section has not already been allocated to a previous segment.
5726 5. PT_GNU_STACK segments do not include any sections.
5727 6. PT_TLS segment includes only SHF_TLS sections.
5728 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5729 8. PT_DYNAMIC should not contain empty sections at the beginning
5730 (with the possible exception of .dynamic). */
5731 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5732 ((((segment->p_paddr \
5733 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5734 : IS_CONTAINED_BY_VMA (section, segment)) \
5735 && (section->flags & SEC_ALLOC) != 0) \
5736 || IS_NOTE (segment, section)) \
5737 && segment->p_type != PT_GNU_STACK \
5738 && (segment->p_type != PT_TLS \
5739 || (section->flags & SEC_THREAD_LOCAL)) \
5740 && (segment->p_type == PT_LOAD \
5741 || segment->p_type == PT_TLS \
5742 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5743 && (segment->p_type != PT_DYNAMIC \
5744 || SECTION_SIZE (section, segment) > 0 \
5745 || (segment->p_paddr \
5746 ? segment->p_paddr != section->lma \
5747 : segment->p_vaddr != section->vma) \
5748 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5750 && !section->segment_mark)
5752 /* If the output section of a section in the input segment is NULL,
5753 it is removed from the corresponding output segment. */
5754 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5755 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5756 && section->output_section != NULL)
5758 /* Returns TRUE iff seg1 starts after the end of seg2. */
5759 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5760 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5762 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5763 their VMA address ranges and their LMA address ranges overlap.
5764 It is possible to have overlapping VMA ranges without overlapping LMA
5765 ranges. RedBoot images for example can have both .data and .bss mapped
5766 to the same VMA range, but with the .data section mapped to a different
5768 #define SEGMENT_OVERLAPS(seg1, seg2) \
5769 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5770 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5771 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5772 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5774 /* Initialise the segment mark field. */
5775 for (section = ibfd->sections; section != NULL; section = section->next)
5776 section->segment_mark = FALSE;
5778 /* The Solaris linker creates program headers in which all the
5779 p_paddr fields are zero. When we try to objcopy or strip such a
5780 file, we get confused. Check for this case, and if we find it
5781 don't set the p_paddr_valid fields. */
5782 p_paddr_valid = FALSE;
5783 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5786 if (segment->p_paddr != 0)
5788 p_paddr_valid = TRUE;
5792 /* Scan through the segments specified in the program header
5793 of the input BFD. For this first scan we look for overlaps
5794 in the loadable segments. These can be created by weird
5795 parameters to objcopy. Also, fix some solaris weirdness. */
5796 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5801 Elf_Internal_Phdr *segment2;
5803 if (segment->p_type == PT_INTERP)
5804 for (section = ibfd->sections; section; section = section->next)
5805 if (IS_SOLARIS_PT_INTERP (segment, section))
5807 /* Mininal change so that the normal section to segment
5808 assignment code will work. */
5809 segment->p_vaddr = section->vma;
5813 if (segment->p_type != PT_LOAD)
5815 /* Remove PT_GNU_RELRO segment. */
5816 if (segment->p_type == PT_GNU_RELRO)
5817 segment->p_type = PT_NULL;
5821 /* Determine if this segment overlaps any previous segments. */
5822 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++)
5824 bfd_signed_vma extra_length;
5826 if (segment2->p_type != PT_LOAD
5827 || !SEGMENT_OVERLAPS (segment, segment2))
5830 /* Merge the two segments together. */
5831 if (segment2->p_vaddr < segment->p_vaddr)
5833 /* Extend SEGMENT2 to include SEGMENT and then delete
5835 extra_length = (SEGMENT_END (segment, segment->p_vaddr)
5836 - SEGMENT_END (segment2, segment2->p_vaddr));
5838 if (extra_length > 0)
5840 segment2->p_memsz += extra_length;
5841 segment2->p_filesz += extra_length;
5844 segment->p_type = PT_NULL;
5846 /* Since we have deleted P we must restart the outer loop. */
5848 segment = elf_tdata (ibfd)->phdr;
5853 /* Extend SEGMENT to include SEGMENT2 and then delete
5855 extra_length = (SEGMENT_END (segment2, segment2->p_vaddr)
5856 - SEGMENT_END (segment, segment->p_vaddr));
5858 if (extra_length > 0)
5860 segment->p_memsz += extra_length;
5861 segment->p_filesz += extra_length;
5864 segment2->p_type = PT_NULL;
5869 /* The second scan attempts to assign sections to segments. */
5870 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5874 unsigned int section_count;
5875 asection **sections;
5876 asection *output_section;
5878 bfd_vma matching_lma;
5879 bfd_vma suggested_lma;
5882 asection *first_section;
5883 bfd_boolean first_matching_lma;
5884 bfd_boolean first_suggested_lma;
5886 if (segment->p_type == PT_NULL)
5889 first_section = NULL;
5890 /* Compute how many sections might be placed into this segment. */
5891 for (section = ibfd->sections, section_count = 0;
5893 section = section->next)
5895 /* Find the first section in the input segment, which may be
5896 removed from the corresponding output segment. */
5897 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5899 if (first_section == NULL)
5900 first_section = section;
5901 if (section->output_section != NULL)
5906 /* Allocate a segment map big enough to contain
5907 all of the sections we have selected. */
5908 amt = sizeof (struct elf_segment_map);
5909 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5910 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
5914 /* Initialise the fields of the segment map. Default to
5915 using the physical address of the segment in the input BFD. */
5917 map->p_type = segment->p_type;
5918 map->p_flags = segment->p_flags;
5919 map->p_flags_valid = 1;
5921 /* If the first section in the input segment is removed, there is
5922 no need to preserve segment physical address in the corresponding
5924 if (!first_section || first_section->output_section != NULL)
5926 map->p_paddr = segment->p_paddr;
5927 map->p_paddr_valid = p_paddr_valid;
5930 /* Determine if this segment contains the ELF file header
5931 and if it contains the program headers themselves. */
5932 map->includes_filehdr = (segment->p_offset == 0
5933 && segment->p_filesz >= iehdr->e_ehsize);
5934 map->includes_phdrs = 0;
5936 if (!phdr_included || segment->p_type != PT_LOAD)
5938 map->includes_phdrs =
5939 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5940 && (segment->p_offset + segment->p_filesz
5941 >= ((bfd_vma) iehdr->e_phoff
5942 + iehdr->e_phnum * iehdr->e_phentsize)));
5944 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5945 phdr_included = TRUE;
5948 if (section_count == 0)
5950 /* Special segments, such as the PT_PHDR segment, may contain
5951 no sections, but ordinary, loadable segments should contain
5952 something. They are allowed by the ELF spec however, so only
5953 a warning is produced. */
5954 if (segment->p_type == PT_LOAD)
5955 (*_bfd_error_handler) (_("%B: warning: Empty loadable segment"
5956 " detected, is this intentional ?\n"),
5960 *pointer_to_map = map;
5961 pointer_to_map = &map->next;
5966 /* Now scan the sections in the input BFD again and attempt
5967 to add their corresponding output sections to the segment map.
5968 The problem here is how to handle an output section which has
5969 been moved (ie had its LMA changed). There are four possibilities:
5971 1. None of the sections have been moved.
5972 In this case we can continue to use the segment LMA from the
5975 2. All of the sections have been moved by the same amount.
5976 In this case we can change the segment's LMA to match the LMA
5977 of the first section.
5979 3. Some of the sections have been moved, others have not.
5980 In this case those sections which have not been moved can be
5981 placed in the current segment which will have to have its size,
5982 and possibly its LMA changed, and a new segment or segments will
5983 have to be created to contain the other sections.
5985 4. The sections have been moved, but not by the same amount.
5986 In this case we can change the segment's LMA to match the LMA
5987 of the first section and we will have to create a new segment
5988 or segments to contain the other sections.
5990 In order to save time, we allocate an array to hold the section
5991 pointers that we are interested in. As these sections get assigned
5992 to a segment, they are removed from this array. */
5994 sections = (asection **) bfd_malloc2 (section_count, sizeof (asection *));
5995 if (sections == NULL)
5998 /* Step One: Scan for segment vs section LMA conflicts.
5999 Also add the sections to the section array allocated above.
6000 Also add the sections to the current segment. In the common
6001 case, where the sections have not been moved, this means that
6002 we have completely filled the segment, and there is nothing
6007 first_matching_lma = TRUE;
6008 first_suggested_lma = TRUE;
6010 for (section = ibfd->sections;
6012 section = section->next)
6013 if (section == first_section)
6016 for (j = 0; section != NULL; section = section->next)
6018 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
6020 output_section = section->output_section;
6022 sections[j++] = section;
6024 /* The Solaris native linker always sets p_paddr to 0.
6025 We try to catch that case here, and set it to the
6026 correct value. Note - some backends require that
6027 p_paddr be left as zero. */
6029 && segment->p_vaddr != 0
6030 && !bed->want_p_paddr_set_to_zero
6032 && output_section->lma != 0
6033 && output_section->vma == (segment->p_vaddr
6034 + (map->includes_filehdr
6037 + (map->includes_phdrs
6039 * iehdr->e_phentsize)
6041 map->p_paddr = segment->p_vaddr;
6043 /* Match up the physical address of the segment with the
6044 LMA address of the output section. */
6045 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
6046 || IS_COREFILE_NOTE (segment, section)
6047 || (bed->want_p_paddr_set_to_zero
6048 && IS_CONTAINED_BY_VMA (output_section, segment)))
6050 if (first_matching_lma || output_section->lma < matching_lma)
6052 matching_lma = output_section->lma;
6053 first_matching_lma = FALSE;
6056 /* We assume that if the section fits within the segment
6057 then it does not overlap any other section within that
6059 map->sections[isec++] = output_section;
6061 else if (first_suggested_lma)
6063 suggested_lma = output_section->lma;
6064 first_suggested_lma = FALSE;
6067 if (j == section_count)
6072 BFD_ASSERT (j == section_count);
6074 /* Step Two: Adjust the physical address of the current segment,
6076 if (isec == section_count)
6078 /* All of the sections fitted within the segment as currently
6079 specified. This is the default case. Add the segment to
6080 the list of built segments and carry on to process the next
6081 program header in the input BFD. */
6082 map->count = section_count;
6083 *pointer_to_map = map;
6084 pointer_to_map = &map->next;
6087 && !bed->want_p_paddr_set_to_zero
6088 && matching_lma != map->p_paddr
6089 && !map->includes_filehdr
6090 && !map->includes_phdrs)
6091 /* There is some padding before the first section in the
6092 segment. So, we must account for that in the output
6094 map->p_vaddr_offset = matching_lma - map->p_paddr;
6101 if (!first_matching_lma)
6103 /* At least one section fits inside the current segment.
6104 Keep it, but modify its physical address to match the
6105 LMA of the first section that fitted. */
6106 map->p_paddr = matching_lma;
6110 /* None of the sections fitted inside the current segment.
6111 Change the current segment's physical address to match
6112 the LMA of the first section. */
6113 map->p_paddr = suggested_lma;
6116 /* Offset the segment physical address from the lma
6117 to allow for space taken up by elf headers. */
6118 if (map->includes_filehdr)
6120 if (map->p_paddr >= iehdr->e_ehsize)
6121 map->p_paddr -= iehdr->e_ehsize;
6124 map->includes_filehdr = FALSE;
6125 map->includes_phdrs = FALSE;
6129 if (map->includes_phdrs)
6131 if (map->p_paddr >= iehdr->e_phnum * iehdr->e_phentsize)
6133 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
6135 /* iehdr->e_phnum is just an estimate of the number
6136 of program headers that we will need. Make a note
6137 here of the number we used and the segment we chose
6138 to hold these headers, so that we can adjust the
6139 offset when we know the correct value. */
6140 phdr_adjust_num = iehdr->e_phnum;
6141 phdr_adjust_seg = map;
6144 map->includes_phdrs = FALSE;
6148 /* Step Three: Loop over the sections again, this time assigning
6149 those that fit to the current segment and removing them from the
6150 sections array; but making sure not to leave large gaps. Once all
6151 possible sections have been assigned to the current segment it is
6152 added to the list of built segments and if sections still remain
6153 to be assigned, a new segment is constructed before repeating
6160 first_suggested_lma = TRUE;
6162 /* Fill the current segment with sections that fit. */
6163 for (j = 0; j < section_count; j++)
6165 section = sections[j];
6167 if (section == NULL)
6170 output_section = section->output_section;
6172 BFD_ASSERT (output_section != NULL);
6174 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
6175 || IS_COREFILE_NOTE (segment, section))
6177 if (map->count == 0)
6179 /* If the first section in a segment does not start at
6180 the beginning of the segment, then something is
6182 if (output_section->lma
6184 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
6185 + (map->includes_phdrs
6186 ? iehdr->e_phnum * iehdr->e_phentsize
6194 prev_sec = map->sections[map->count - 1];
6196 /* If the gap between the end of the previous section
6197 and the start of this section is more than
6198 maxpagesize then we need to start a new segment. */
6199 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
6201 < BFD_ALIGN (output_section->lma, maxpagesize))
6202 || (prev_sec->lma + prev_sec->size
6203 > output_section->lma))
6205 if (first_suggested_lma)
6207 suggested_lma = output_section->lma;
6208 first_suggested_lma = FALSE;
6215 map->sections[map->count++] = output_section;
6218 section->segment_mark = TRUE;
6220 else if (first_suggested_lma)
6222 suggested_lma = output_section->lma;
6223 first_suggested_lma = FALSE;
6227 BFD_ASSERT (map->count > 0);
6229 /* Add the current segment to the list of built segments. */
6230 *pointer_to_map = map;
6231 pointer_to_map = &map->next;
6233 if (isec < section_count)
6235 /* We still have not allocated all of the sections to
6236 segments. Create a new segment here, initialise it
6237 and carry on looping. */
6238 amt = sizeof (struct elf_segment_map);
6239 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
6240 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
6247 /* Initialise the fields of the segment map. Set the physical
6248 physical address to the LMA of the first section that has
6249 not yet been assigned. */
6251 map->p_type = segment->p_type;
6252 map->p_flags = segment->p_flags;
6253 map->p_flags_valid = 1;
6254 map->p_paddr = suggested_lma;
6255 map->p_paddr_valid = p_paddr_valid;
6256 map->includes_filehdr = 0;
6257 map->includes_phdrs = 0;
6260 while (isec < section_count);
6265 elf_seg_map (obfd) = map_first;
6267 /* If we had to estimate the number of program headers that were
6268 going to be needed, then check our estimate now and adjust
6269 the offset if necessary. */
6270 if (phdr_adjust_seg != NULL)
6274 for (count = 0, map = map_first; map != NULL; map = map->next)
6277 if (count > phdr_adjust_num)
6278 phdr_adjust_seg->p_paddr
6279 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
6284 #undef IS_CONTAINED_BY_VMA
6285 #undef IS_CONTAINED_BY_LMA
6287 #undef IS_COREFILE_NOTE
6288 #undef IS_SOLARIS_PT_INTERP
6289 #undef IS_SECTION_IN_INPUT_SEGMENT
6290 #undef INCLUDE_SECTION_IN_SEGMENT
6291 #undef SEGMENT_AFTER_SEGMENT
6292 #undef SEGMENT_OVERLAPS
6296 /* Copy ELF program header information. */
6299 copy_elf_program_header (bfd *ibfd, bfd *obfd)
6301 Elf_Internal_Ehdr *iehdr;
6302 struct elf_segment_map *map;
6303 struct elf_segment_map *map_first;
6304 struct elf_segment_map **pointer_to_map;
6305 Elf_Internal_Phdr *segment;
6307 unsigned int num_segments;
6308 bfd_boolean phdr_included = FALSE;
6309 bfd_boolean p_paddr_valid;
6311 iehdr = elf_elfheader (ibfd);
6314 pointer_to_map = &map_first;
6316 /* If all the segment p_paddr fields are zero, don't set
6317 map->p_paddr_valid. */
6318 p_paddr_valid = FALSE;
6319 num_segments = elf_elfheader (ibfd)->e_phnum;
6320 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6323 if (segment->p_paddr != 0)
6325 p_paddr_valid = TRUE;
6329 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6334 unsigned int section_count;
6336 Elf_Internal_Shdr *this_hdr;
6337 asection *first_section = NULL;
6338 asection *lowest_section;
6340 /* Compute how many sections are in this segment. */
6341 for (section = ibfd->sections, section_count = 0;
6343 section = section->next)
6345 this_hdr = &(elf_section_data(section)->this_hdr);
6346 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6348 if (first_section == NULL)
6349 first_section = section;
6354 /* Allocate a segment map big enough to contain
6355 all of the sections we have selected. */
6356 amt = sizeof (struct elf_segment_map);
6357 if (section_count != 0)
6358 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
6359 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
6363 /* Initialize the fields of the output segment map with the
6366 map->p_type = segment->p_type;
6367 map->p_flags = segment->p_flags;
6368 map->p_flags_valid = 1;
6369 map->p_paddr = segment->p_paddr;
6370 map->p_paddr_valid = p_paddr_valid;
6371 map->p_align = segment->p_align;
6372 map->p_align_valid = 1;
6373 map->p_vaddr_offset = 0;
6375 if (map->p_type == PT_GNU_RELRO
6376 || map->p_type == PT_GNU_STACK)
6378 /* The PT_GNU_RELRO segment may contain the first a few
6379 bytes in the .got.plt section even if the whole .got.plt
6380 section isn't in the PT_GNU_RELRO segment. We won't
6381 change the size of the PT_GNU_RELRO segment.
6382 Similarly, PT_GNU_STACK size is significant on uclinux
6384 map->p_size = segment->p_memsz;
6385 map->p_size_valid = 1;
6388 /* Determine if this segment contains the ELF file header
6389 and if it contains the program headers themselves. */
6390 map->includes_filehdr = (segment->p_offset == 0
6391 && segment->p_filesz >= iehdr->e_ehsize);
6393 map->includes_phdrs = 0;
6394 if (! phdr_included || segment->p_type != PT_LOAD)
6396 map->includes_phdrs =
6397 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
6398 && (segment->p_offset + segment->p_filesz
6399 >= ((bfd_vma) iehdr->e_phoff
6400 + iehdr->e_phnum * iehdr->e_phentsize)));
6402 if (segment->p_type == PT_LOAD && map->includes_phdrs)
6403 phdr_included = TRUE;
6406 lowest_section = NULL;
6407 if (section_count != 0)
6409 unsigned int isec = 0;
6411 for (section = first_section;
6413 section = section->next)
6415 this_hdr = &(elf_section_data(section)->this_hdr);
6416 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6418 map->sections[isec++] = section->output_section;
6419 if ((section->flags & SEC_ALLOC) != 0)
6423 if (lowest_section == NULL
6424 || section->lma < lowest_section->lma)
6425 lowest_section = section;
6427 /* Section lmas are set up from PT_LOAD header
6428 p_paddr in _bfd_elf_make_section_from_shdr.
6429 If this header has a p_paddr that disagrees
6430 with the section lma, flag the p_paddr as
6432 if ((section->flags & SEC_LOAD) != 0)
6433 seg_off = this_hdr->sh_offset - segment->p_offset;
6435 seg_off = this_hdr->sh_addr - segment->p_vaddr;
6436 if (section->lma - segment->p_paddr != seg_off)
6437 map->p_paddr_valid = FALSE;
6439 if (isec == section_count)
6445 if (map->includes_filehdr && lowest_section != NULL)
6446 /* We need to keep the space used by the headers fixed. */
6447 map->header_size = lowest_section->vma - segment->p_vaddr;
6449 if (!map->includes_phdrs
6450 && !map->includes_filehdr
6451 && map->p_paddr_valid)
6452 /* There is some other padding before the first section. */
6453 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
6454 - segment->p_paddr);
6456 map->count = section_count;
6457 *pointer_to_map = map;
6458 pointer_to_map = &map->next;
6461 elf_seg_map (obfd) = map_first;
6465 /* Copy private BFD data. This copies or rewrites ELF program header
6469 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
6471 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6472 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6475 if (elf_tdata (ibfd)->phdr == NULL)
6478 if (ibfd->xvec == obfd->xvec)
6480 /* Check to see if any sections in the input BFD
6481 covered by ELF program header have changed. */
6482 Elf_Internal_Phdr *segment;
6483 asection *section, *osec;
6484 unsigned int i, num_segments;
6485 Elf_Internal_Shdr *this_hdr;
6486 const struct elf_backend_data *bed;
6488 bed = get_elf_backend_data (ibfd);
6490 /* Regenerate the segment map if p_paddr is set to 0. */
6491 if (bed->want_p_paddr_set_to_zero)
6494 /* Initialize the segment mark field. */
6495 for (section = obfd->sections; section != NULL;
6496 section = section->next)
6497 section->segment_mark = FALSE;
6499 num_segments = elf_elfheader (ibfd)->e_phnum;
6500 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6504 /* PR binutils/3535. The Solaris linker always sets the p_paddr
6505 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
6506 which severly confuses things, so always regenerate the segment
6507 map in this case. */
6508 if (segment->p_paddr == 0
6509 && segment->p_memsz == 0
6510 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
6513 for (section = ibfd->sections;
6514 section != NULL; section = section->next)
6516 /* We mark the output section so that we know it comes
6517 from the input BFD. */
6518 osec = section->output_section;
6520 osec->segment_mark = TRUE;
6522 /* Check if this section is covered by the segment. */
6523 this_hdr = &(elf_section_data(section)->this_hdr);
6524 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6526 /* FIXME: Check if its output section is changed or
6527 removed. What else do we need to check? */
6529 || section->flags != osec->flags
6530 || section->lma != osec->lma
6531 || section->vma != osec->vma
6532 || section->size != osec->size
6533 || section->rawsize != osec->rawsize
6534 || section->alignment_power != osec->alignment_power)
6540 /* Check to see if any output section do not come from the
6542 for (section = obfd->sections; section != NULL;
6543 section = section->next)
6545 if (section->segment_mark == FALSE)
6548 section->segment_mark = FALSE;
6551 return copy_elf_program_header (ibfd, obfd);
6555 if (ibfd->xvec == obfd->xvec)
6557 /* When rewriting program header, set the output maxpagesize to
6558 the maximum alignment of input PT_LOAD segments. */
6559 Elf_Internal_Phdr *segment;
6561 unsigned int num_segments = elf_elfheader (ibfd)->e_phnum;
6562 bfd_vma maxpagesize = 0;
6564 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6567 if (segment->p_type == PT_LOAD
6568 && maxpagesize < segment->p_align)
6569 maxpagesize = segment->p_align;
6571 if (maxpagesize != get_elf_backend_data (obfd)->maxpagesize)
6572 bfd_emul_set_maxpagesize (bfd_get_target (obfd), maxpagesize);
6575 return rewrite_elf_program_header (ibfd, obfd);
6578 /* Initialize private output section information from input section. */
6581 _bfd_elf_init_private_section_data (bfd *ibfd,
6585 struct bfd_link_info *link_info)
6588 Elf_Internal_Shdr *ihdr, *ohdr;
6589 bfd_boolean final_link = link_info != NULL && !link_info->relocatable;
6591 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6592 || obfd->xvec->flavour != bfd_target_elf_flavour)
6595 BFD_ASSERT (elf_section_data (osec) != NULL);
6597 /* For objcopy and relocatable link, don't copy the output ELF
6598 section type from input if the output BFD section flags have been
6599 set to something different. For a final link allow some flags
6600 that the linker clears to differ. */
6601 if (elf_section_type (osec) == SHT_NULL
6602 && (osec->flags == isec->flags
6604 && ((osec->flags ^ isec->flags)
6605 & ~(SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_RELOC)) == 0)))
6606 elf_section_type (osec) = elf_section_type (isec);
6608 /* FIXME: Is this correct for all OS/PROC specific flags? */
6609 elf_section_flags (osec) |= (elf_section_flags (isec)
6610 & (SHF_MASKOS | SHF_MASKPROC));
6612 /* Set things up for objcopy and relocatable link. The output
6613 SHT_GROUP section will have its elf_next_in_group pointing back
6614 to the input group members. Ignore linker created group section.
6615 See elfNN_ia64_object_p in elfxx-ia64.c. */
6618 if (elf_sec_group (isec) == NULL
6619 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
6621 if (elf_section_flags (isec) & SHF_GROUP)
6622 elf_section_flags (osec) |= SHF_GROUP;
6623 elf_next_in_group (osec) = elf_next_in_group (isec);
6624 elf_section_data (osec)->group = elf_section_data (isec)->group;
6628 ihdr = &elf_section_data (isec)->this_hdr;
6630 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
6631 don't use the output section of the linked-to section since it
6632 may be NULL at this point. */
6633 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
6635 ohdr = &elf_section_data (osec)->this_hdr;
6636 ohdr->sh_flags |= SHF_LINK_ORDER;
6637 elf_linked_to_section (osec) = elf_linked_to_section (isec);
6640 osec->use_rela_p = isec->use_rela_p;
6645 /* Copy private section information. This copies over the entsize
6646 field, and sometimes the info field. */
6649 _bfd_elf_copy_private_section_data (bfd *ibfd,
6654 Elf_Internal_Shdr *ihdr, *ohdr;
6656 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6657 || obfd->xvec->flavour != bfd_target_elf_flavour)
6660 ihdr = &elf_section_data (isec)->this_hdr;
6661 ohdr = &elf_section_data (osec)->this_hdr;
6663 ohdr->sh_entsize = ihdr->sh_entsize;
6665 if (ihdr->sh_type == SHT_SYMTAB
6666 || ihdr->sh_type == SHT_DYNSYM
6667 || ihdr->sh_type == SHT_GNU_verneed
6668 || ihdr->sh_type == SHT_GNU_verdef)
6669 ohdr->sh_info = ihdr->sh_info;
6671 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
6675 /* Look at all the SHT_GROUP sections in IBFD, making any adjustments
6676 necessary if we are removing either the SHT_GROUP section or any of
6677 the group member sections. DISCARDED is the value that a section's
6678 output_section has if the section will be discarded, NULL when this
6679 function is called from objcopy, bfd_abs_section_ptr when called
6683 _bfd_elf_fixup_group_sections (bfd *ibfd, asection *discarded)
6687 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
6688 if (elf_section_type (isec) == SHT_GROUP)
6690 asection *first = elf_next_in_group (isec);
6691 asection *s = first;
6692 bfd_size_type removed = 0;
6696 /* If this member section is being output but the
6697 SHT_GROUP section is not, then clear the group info
6698 set up by _bfd_elf_copy_private_section_data. */
6699 if (s->output_section != discarded
6700 && isec->output_section == discarded)
6702 elf_section_flags (s->output_section) &= ~SHF_GROUP;
6703 elf_group_name (s->output_section) = NULL;
6705 /* Conversely, if the member section is not being output
6706 but the SHT_GROUP section is, then adjust its size. */
6707 else if (s->output_section == discarded
6708 && isec->output_section != discarded)
6710 s = elf_next_in_group (s);
6716 if (discarded != NULL)
6718 /* If we've been called for ld -r, then we need to
6719 adjust the input section size. This function may
6720 be called multiple times, so save the original
6722 if (isec->rawsize == 0)
6723 isec->rawsize = isec->size;
6724 isec->size = isec->rawsize - removed;
6728 /* Adjust the output section size when called from
6730 isec->output_section->size -= removed;
6738 /* Copy private header information. */
6741 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
6743 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6744 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6747 /* Copy over private BFD data if it has not already been copied.
6748 This must be done here, rather than in the copy_private_bfd_data
6749 entry point, because the latter is called after the section
6750 contents have been set, which means that the program headers have
6751 already been worked out. */
6752 if (elf_seg_map (obfd) == NULL && elf_tdata (ibfd)->phdr != NULL)
6754 if (! copy_private_bfd_data (ibfd, obfd))
6758 return _bfd_elf_fixup_group_sections (ibfd, NULL);
6761 /* Copy private symbol information. If this symbol is in a section
6762 which we did not map into a BFD section, try to map the section
6763 index correctly. We use special macro definitions for the mapped
6764 section indices; these definitions are interpreted by the
6765 swap_out_syms function. */
6767 #define MAP_ONESYMTAB (SHN_HIOS + 1)
6768 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
6769 #define MAP_STRTAB (SHN_HIOS + 3)
6770 #define MAP_SHSTRTAB (SHN_HIOS + 4)
6771 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
6774 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
6779 elf_symbol_type *isym, *osym;
6781 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6782 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6785 isym = elf_symbol_from (ibfd, isymarg);
6786 osym = elf_symbol_from (obfd, osymarg);
6789 && isym->internal_elf_sym.st_shndx != 0
6791 && bfd_is_abs_section (isym->symbol.section))
6795 shndx = isym->internal_elf_sym.st_shndx;
6796 if (shndx == elf_onesymtab (ibfd))
6797 shndx = MAP_ONESYMTAB;
6798 else if (shndx == elf_dynsymtab (ibfd))
6799 shndx = MAP_DYNSYMTAB;
6800 else if (shndx == elf_strtab_sec (ibfd))
6802 else if (shndx == elf_shstrtab_sec (ibfd))
6803 shndx = MAP_SHSTRTAB;
6804 else if (shndx == elf_symtab_shndx (ibfd))
6805 shndx = MAP_SYM_SHNDX;
6806 osym->internal_elf_sym.st_shndx = shndx;
6812 /* Swap out the symbols. */
6815 swap_out_syms (bfd *abfd,
6816 struct bfd_strtab_hash **sttp,
6819 const struct elf_backend_data *bed;
6822 struct bfd_strtab_hash *stt;
6823 Elf_Internal_Shdr *symtab_hdr;
6824 Elf_Internal_Shdr *symtab_shndx_hdr;
6825 Elf_Internal_Shdr *symstrtab_hdr;
6826 bfd_byte *outbound_syms;
6827 bfd_byte *outbound_shndx;
6829 unsigned int num_locals;
6831 bfd_boolean name_local_sections;
6833 if (!elf_map_symbols (abfd, &num_locals))
6836 /* Dump out the symtabs. */
6837 stt = _bfd_elf_stringtab_init ();
6841 bed = get_elf_backend_data (abfd);
6842 symcount = bfd_get_symcount (abfd);
6843 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6844 symtab_hdr->sh_type = SHT_SYMTAB;
6845 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6846 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6847 symtab_hdr->sh_info = num_locals + 1;
6848 symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
6850 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6851 symstrtab_hdr->sh_type = SHT_STRTAB;
6853 outbound_syms = (bfd_byte *) bfd_alloc2 (abfd, 1 + symcount,
6854 bed->s->sizeof_sym);
6855 if (outbound_syms == NULL)
6857 _bfd_stringtab_free (stt);
6860 symtab_hdr->contents = outbound_syms;
6862 outbound_shndx = NULL;
6863 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6864 if (symtab_shndx_hdr->sh_name != 0)
6866 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6867 outbound_shndx = (bfd_byte *)
6868 bfd_zalloc2 (abfd, 1 + symcount, sizeof (Elf_External_Sym_Shndx));
6869 if (outbound_shndx == NULL)
6871 _bfd_stringtab_free (stt);
6875 symtab_shndx_hdr->contents = outbound_shndx;
6876 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6877 symtab_shndx_hdr->sh_size = amt;
6878 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6879 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6882 /* Now generate the data (for "contents"). */
6884 /* Fill in zeroth symbol and swap it out. */
6885 Elf_Internal_Sym sym;
6891 sym.st_shndx = SHN_UNDEF;
6892 sym.st_target_internal = 0;
6893 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6894 outbound_syms += bed->s->sizeof_sym;
6895 if (outbound_shndx != NULL)
6896 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6900 = (bed->elf_backend_name_local_section_symbols
6901 && bed->elf_backend_name_local_section_symbols (abfd));
6903 syms = bfd_get_outsymbols (abfd);
6904 for (idx = 0; idx < symcount; idx++)
6906 Elf_Internal_Sym sym;
6907 bfd_vma value = syms[idx]->value;
6908 elf_symbol_type *type_ptr;
6909 flagword flags = syms[idx]->flags;
6912 if (!name_local_sections
6913 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6915 /* Local section symbols have no name. */
6920 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6923 if (sym.st_name == (unsigned long) -1)
6925 _bfd_stringtab_free (stt);
6930 type_ptr = elf_symbol_from (abfd, syms[idx]);
6932 if ((flags & BSF_SECTION_SYM) == 0
6933 && bfd_is_com_section (syms[idx]->section))
6935 /* ELF common symbols put the alignment into the `value' field,
6936 and the size into the `size' field. This is backwards from
6937 how BFD handles it, so reverse it here. */
6938 sym.st_size = value;
6939 if (type_ptr == NULL
6940 || type_ptr->internal_elf_sym.st_value == 0)
6941 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6943 sym.st_value = type_ptr->internal_elf_sym.st_value;
6944 sym.st_shndx = _bfd_elf_section_from_bfd_section
6945 (abfd, syms[idx]->section);
6949 asection *sec = syms[idx]->section;
6952 if (sec->output_section)
6954 value += sec->output_offset;
6955 sec = sec->output_section;
6958 /* Don't add in the section vma for relocatable output. */
6959 if (! relocatable_p)
6961 sym.st_value = value;
6962 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6964 if (bfd_is_abs_section (sec)
6966 && type_ptr->internal_elf_sym.st_shndx != 0)
6968 /* This symbol is in a real ELF section which we did
6969 not create as a BFD section. Undo the mapping done
6970 by copy_private_symbol_data. */
6971 shndx = type_ptr->internal_elf_sym.st_shndx;
6975 shndx = elf_onesymtab (abfd);
6978 shndx = elf_dynsymtab (abfd);
6981 shndx = elf_strtab_sec (abfd);
6984 shndx = elf_shstrtab_sec (abfd);
6987 shndx = elf_symtab_shndx (abfd);
6996 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6998 if (shndx == SHN_BAD)
7002 /* Writing this would be a hell of a lot easier if
7003 we had some decent documentation on bfd, and
7004 knew what to expect of the library, and what to
7005 demand of applications. For example, it
7006 appears that `objcopy' might not set the
7007 section of a symbol to be a section that is
7008 actually in the output file. */
7009 sec2 = bfd_get_section_by_name (abfd, sec->name);
7012 _bfd_error_handler (_("\
7013 Unable to find equivalent output section for symbol '%s' from section '%s'"),
7014 syms[idx]->name ? syms[idx]->name : "<Local sym>",
7016 bfd_set_error (bfd_error_invalid_operation);
7017 _bfd_stringtab_free (stt);
7021 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
7022 BFD_ASSERT (shndx != SHN_BAD);
7026 sym.st_shndx = shndx;
7029 if ((flags & BSF_THREAD_LOCAL) != 0)
7031 else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0)
7032 type = STT_GNU_IFUNC;
7033 else if ((flags & BSF_FUNCTION) != 0)
7035 else if ((flags & BSF_OBJECT) != 0)
7037 else if ((flags & BSF_RELC) != 0)
7039 else if ((flags & BSF_SRELC) != 0)
7044 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
7047 /* Processor-specific types. */
7048 if (type_ptr != NULL
7049 && bed->elf_backend_get_symbol_type)
7050 type = ((*bed->elf_backend_get_symbol_type)
7051 (&type_ptr->internal_elf_sym, type));
7053 if (flags & BSF_SECTION_SYM)
7055 if (flags & BSF_GLOBAL)
7056 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
7058 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
7060 else if (bfd_is_com_section (syms[idx]->section))
7062 #ifdef USE_STT_COMMON
7063 if (type == STT_OBJECT)
7064 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_COMMON);
7067 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
7069 else if (bfd_is_und_section (syms[idx]->section))
7070 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
7074 else if (flags & BSF_FILE)
7075 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
7078 int bind = STB_LOCAL;
7080 if (flags & BSF_LOCAL)
7082 else if (flags & BSF_GNU_UNIQUE)
7083 bind = STB_GNU_UNIQUE;
7084 else if (flags & BSF_WEAK)
7086 else if (flags & BSF_GLOBAL)
7089 sym.st_info = ELF_ST_INFO (bind, type);
7092 if (type_ptr != NULL)
7094 sym.st_other = type_ptr->internal_elf_sym.st_other;
7095 sym.st_target_internal
7096 = type_ptr->internal_elf_sym.st_target_internal;
7101 sym.st_target_internal = 0;
7104 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
7105 outbound_syms += bed->s->sizeof_sym;
7106 if (outbound_shndx != NULL)
7107 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
7111 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
7112 symstrtab_hdr->sh_type = SHT_STRTAB;
7114 symstrtab_hdr->sh_flags = 0;
7115 symstrtab_hdr->sh_addr = 0;
7116 symstrtab_hdr->sh_entsize = 0;
7117 symstrtab_hdr->sh_link = 0;
7118 symstrtab_hdr->sh_info = 0;
7119 symstrtab_hdr->sh_addralign = 1;
7124 /* Return the number of bytes required to hold the symtab vector.
7126 Note that we base it on the count plus 1, since we will null terminate
7127 the vector allocated based on this size. However, the ELF symbol table
7128 always has a dummy entry as symbol #0, so it ends up even. */
7131 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
7135 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
7137 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
7138 symtab_size = (symcount + 1) * (sizeof (asymbol *));
7140 symtab_size -= sizeof (asymbol *);
7146 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
7150 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
7152 if (elf_dynsymtab (abfd) == 0)
7154 bfd_set_error (bfd_error_invalid_operation);
7158 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
7159 symtab_size = (symcount + 1) * (sizeof (asymbol *));
7161 symtab_size -= sizeof (asymbol *);
7167 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
7170 return (asect->reloc_count + 1) * sizeof (arelent *);
7173 /* Canonicalize the relocs. */
7176 _bfd_elf_canonicalize_reloc (bfd *abfd,
7183 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7185 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
7188 tblptr = section->relocation;
7189 for (i = 0; i < section->reloc_count; i++)
7190 *relptr++ = tblptr++;
7194 return section->reloc_count;
7198 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
7200 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7201 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
7204 bfd_get_symcount (abfd) = symcount;
7209 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
7210 asymbol **allocation)
7212 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7213 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
7216 bfd_get_dynamic_symcount (abfd) = symcount;
7220 /* Return the size required for the dynamic reloc entries. Any loadable
7221 section that was actually installed in the BFD, and has type SHT_REL
7222 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
7223 dynamic reloc section. */
7226 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
7231 if (elf_dynsymtab (abfd) == 0)
7233 bfd_set_error (bfd_error_invalid_operation);
7237 ret = sizeof (arelent *);
7238 for (s = abfd->sections; s != NULL; s = s->next)
7239 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
7240 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
7241 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
7242 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
7243 * sizeof (arelent *));
7248 /* Canonicalize the dynamic relocation entries. Note that we return the
7249 dynamic relocations as a single block, although they are actually
7250 associated with particular sections; the interface, which was
7251 designed for SunOS style shared libraries, expects that there is only
7252 one set of dynamic relocs. Any loadable section that was actually
7253 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
7254 dynamic symbol table, is considered to be a dynamic reloc section. */
7257 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
7261 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
7265 if (elf_dynsymtab (abfd) == 0)
7267 bfd_set_error (bfd_error_invalid_operation);
7271 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
7273 for (s = abfd->sections; s != NULL; s = s->next)
7275 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
7276 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
7277 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
7282 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
7284 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
7286 for (i = 0; i < count; i++)
7297 /* Read in the version information. */
7300 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
7302 bfd_byte *contents = NULL;
7303 unsigned int freeidx = 0;
7305 if (elf_dynverref (abfd) != 0)
7307 Elf_Internal_Shdr *hdr;
7308 Elf_External_Verneed *everneed;
7309 Elf_Internal_Verneed *iverneed;
7311 bfd_byte *contents_end;
7313 hdr = &elf_tdata (abfd)->dynverref_hdr;
7315 if (hdr->sh_info == 0 || hdr->sh_size < sizeof (Elf_External_Verneed))
7317 error_return_bad_verref:
7318 (*_bfd_error_handler)
7319 (_("%B: .gnu.version_r invalid entry"), abfd);
7320 bfd_set_error (bfd_error_bad_value);
7321 error_return_verref:
7322 elf_tdata (abfd)->verref = NULL;
7323 elf_tdata (abfd)->cverrefs = 0;
7327 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
7328 if (contents == NULL)
7329 goto error_return_verref;
7331 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
7332 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
7333 goto error_return_verref;
7335 elf_tdata (abfd)->verref = (Elf_Internal_Verneed *)
7336 bfd_zalloc2 (abfd, hdr->sh_info, sizeof (Elf_Internal_Verneed));
7338 if (elf_tdata (abfd)->verref == NULL)
7339 goto error_return_verref;
7341 BFD_ASSERT (sizeof (Elf_External_Verneed)
7342 == sizeof (Elf_External_Vernaux));
7343 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
7344 everneed = (Elf_External_Verneed *) contents;
7345 iverneed = elf_tdata (abfd)->verref;
7346 for (i = 0; i < hdr->sh_info; i++, iverneed++)
7348 Elf_External_Vernaux *evernaux;
7349 Elf_Internal_Vernaux *ivernaux;
7352 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
7354 iverneed->vn_bfd = abfd;
7356 iverneed->vn_filename =
7357 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
7359 if (iverneed->vn_filename == NULL)
7360 goto error_return_bad_verref;
7362 if (iverneed->vn_cnt == 0)
7363 iverneed->vn_auxptr = NULL;
7366 iverneed->vn_auxptr = (struct elf_internal_vernaux *)
7367 bfd_alloc2 (abfd, iverneed->vn_cnt,
7368 sizeof (Elf_Internal_Vernaux));
7369 if (iverneed->vn_auxptr == NULL)
7370 goto error_return_verref;
7373 if (iverneed->vn_aux
7374 > (size_t) (contents_end - (bfd_byte *) everneed))
7375 goto error_return_bad_verref;
7377 evernaux = ((Elf_External_Vernaux *)
7378 ((bfd_byte *) everneed + iverneed->vn_aux));
7379 ivernaux = iverneed->vn_auxptr;
7380 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
7382 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
7384 ivernaux->vna_nodename =
7385 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
7386 ivernaux->vna_name);
7387 if (ivernaux->vna_nodename == NULL)
7388 goto error_return_bad_verref;
7390 if (ivernaux->vna_other > freeidx)
7391 freeidx = ivernaux->vna_other;
7393 ivernaux->vna_nextptr = NULL;
7394 if (ivernaux->vna_next == 0)
7396 iverneed->vn_cnt = j + 1;
7399 if (j + 1 < iverneed->vn_cnt)
7400 ivernaux->vna_nextptr = ivernaux + 1;
7402 if (ivernaux->vna_next
7403 > (size_t) (contents_end - (bfd_byte *) evernaux))
7404 goto error_return_bad_verref;
7406 evernaux = ((Elf_External_Vernaux *)
7407 ((bfd_byte *) evernaux + ivernaux->vna_next));
7410 iverneed->vn_nextref = NULL;
7411 if (iverneed->vn_next == 0)
7413 if (i + 1 < hdr->sh_info)
7414 iverneed->vn_nextref = iverneed + 1;
7416 if (iverneed->vn_next
7417 > (size_t) (contents_end - (bfd_byte *) everneed))
7418 goto error_return_bad_verref;
7420 everneed = ((Elf_External_Verneed *)
7421 ((bfd_byte *) everneed + iverneed->vn_next));
7423 elf_tdata (abfd)->cverrefs = i;
7429 if (elf_dynverdef (abfd) != 0)
7431 Elf_Internal_Shdr *hdr;
7432 Elf_External_Verdef *everdef;
7433 Elf_Internal_Verdef *iverdef;
7434 Elf_Internal_Verdef *iverdefarr;
7435 Elf_Internal_Verdef iverdefmem;
7437 unsigned int maxidx;
7438 bfd_byte *contents_end_def, *contents_end_aux;
7440 hdr = &elf_tdata (abfd)->dynverdef_hdr;
7442 if (hdr->sh_info == 0 || hdr->sh_size < sizeof (Elf_External_Verdef))
7444 error_return_bad_verdef:
7445 (*_bfd_error_handler)
7446 (_("%B: .gnu.version_d invalid entry"), abfd);
7447 bfd_set_error (bfd_error_bad_value);
7448 error_return_verdef:
7449 elf_tdata (abfd)->verdef = NULL;
7450 elf_tdata (abfd)->cverdefs = 0;
7454 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
7455 if (contents == NULL)
7456 goto error_return_verdef;
7457 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
7458 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
7459 goto error_return_verdef;
7461 BFD_ASSERT (sizeof (Elf_External_Verdef)
7462 >= sizeof (Elf_External_Verdaux));
7463 contents_end_def = contents + hdr->sh_size
7464 - sizeof (Elf_External_Verdef);
7465 contents_end_aux = contents + hdr->sh_size
7466 - sizeof (Elf_External_Verdaux);
7468 /* We know the number of entries in the section but not the maximum
7469 index. Therefore we have to run through all entries and find
7471 everdef = (Elf_External_Verdef *) contents;
7473 for (i = 0; i < hdr->sh_info; ++i)
7475 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
7477 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) == 0)
7478 goto error_return_bad_verdef;
7479 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
7480 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
7482 if (iverdefmem.vd_next == 0)
7485 if (iverdefmem.vd_next
7486 > (size_t) (contents_end_def - (bfd_byte *) everdef))
7487 goto error_return_bad_verdef;
7489 everdef = ((Elf_External_Verdef *)
7490 ((bfd_byte *) everdef + iverdefmem.vd_next));
7493 if (default_imported_symver)
7495 if (freeidx > maxidx)
7501 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
7502 bfd_zalloc2 (abfd, maxidx, sizeof (Elf_Internal_Verdef));
7503 if (elf_tdata (abfd)->verdef == NULL)
7504 goto error_return_verdef;
7506 elf_tdata (abfd)->cverdefs = maxidx;
7508 everdef = (Elf_External_Verdef *) contents;
7509 iverdefarr = elf_tdata (abfd)->verdef;
7510 for (i = 0; i < hdr->sh_info; i++)
7512 Elf_External_Verdaux *everdaux;
7513 Elf_Internal_Verdaux *iverdaux;
7516 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
7518 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
7519 goto error_return_bad_verdef;
7521 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
7522 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
7524 iverdef->vd_bfd = abfd;
7526 if (iverdef->vd_cnt == 0)
7527 iverdef->vd_auxptr = NULL;
7530 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
7531 bfd_alloc2 (abfd, iverdef->vd_cnt,
7532 sizeof (Elf_Internal_Verdaux));
7533 if (iverdef->vd_auxptr == NULL)
7534 goto error_return_verdef;
7538 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
7539 goto error_return_bad_verdef;
7541 everdaux = ((Elf_External_Verdaux *)
7542 ((bfd_byte *) everdef + iverdef->vd_aux));
7543 iverdaux = iverdef->vd_auxptr;
7544 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
7546 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
7548 iverdaux->vda_nodename =
7549 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
7550 iverdaux->vda_name);
7551 if (iverdaux->vda_nodename == NULL)
7552 goto error_return_bad_verdef;
7554 iverdaux->vda_nextptr = NULL;
7555 if (iverdaux->vda_next == 0)
7557 iverdef->vd_cnt = j + 1;
7560 if (j + 1 < iverdef->vd_cnt)
7561 iverdaux->vda_nextptr = iverdaux + 1;
7563 if (iverdaux->vda_next
7564 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
7565 goto error_return_bad_verdef;
7567 everdaux = ((Elf_External_Verdaux *)
7568 ((bfd_byte *) everdaux + iverdaux->vda_next));
7571 if (iverdef->vd_cnt)
7572 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
7574 iverdef->vd_nextdef = NULL;
7575 if (iverdef->vd_next == 0)
7577 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
7578 iverdef->vd_nextdef = iverdef + 1;
7580 everdef = ((Elf_External_Verdef *)
7581 ((bfd_byte *) everdef + iverdef->vd_next));
7587 else if (default_imported_symver)
7594 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
7595 bfd_zalloc2 (abfd, freeidx, sizeof (Elf_Internal_Verdef));
7596 if (elf_tdata (abfd)->verdef == NULL)
7599 elf_tdata (abfd)->cverdefs = freeidx;
7602 /* Create a default version based on the soname. */
7603 if (default_imported_symver)
7605 Elf_Internal_Verdef *iverdef;
7606 Elf_Internal_Verdaux *iverdaux;
7608 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];
7610 iverdef->vd_version = VER_DEF_CURRENT;
7611 iverdef->vd_flags = 0;
7612 iverdef->vd_ndx = freeidx;
7613 iverdef->vd_cnt = 1;
7615 iverdef->vd_bfd = abfd;
7617 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
7618 if (iverdef->vd_nodename == NULL)
7619 goto error_return_verdef;
7620 iverdef->vd_nextdef = NULL;
7621 iverdef->vd_auxptr = ((struct elf_internal_verdaux *)
7622 bfd_zalloc (abfd, sizeof (Elf_Internal_Verdaux)));
7623 if (iverdef->vd_auxptr == NULL)
7624 goto error_return_verdef;
7626 iverdaux = iverdef->vd_auxptr;
7627 iverdaux->vda_nodename = iverdef->vd_nodename;
7633 if (contents != NULL)
7639 _bfd_elf_make_empty_symbol (bfd *abfd)
7641 elf_symbol_type *newsym;
7643 newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof * newsym);
7646 newsym->symbol.the_bfd = abfd;
7647 return &newsym->symbol;
7651 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
7655 bfd_symbol_info (symbol, ret);
7658 /* Return whether a symbol name implies a local symbol. Most targets
7659 use this function for the is_local_label_name entry point, but some
7663 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
7666 /* Normal local symbols start with ``.L''. */
7667 if (name[0] == '.' && name[1] == 'L')
7670 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
7671 DWARF debugging symbols starting with ``..''. */
7672 if (name[0] == '.' && name[1] == '.')
7675 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
7676 emitting DWARF debugging output. I suspect this is actually a
7677 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
7678 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
7679 underscore to be emitted on some ELF targets). For ease of use,
7680 we treat such symbols as local. */
7681 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
7688 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
7689 asymbol *symbol ATTRIBUTE_UNUSED)
7696 _bfd_elf_set_arch_mach (bfd *abfd,
7697 enum bfd_architecture arch,
7698 unsigned long machine)
7700 /* If this isn't the right architecture for this backend, and this
7701 isn't the generic backend, fail. */
7702 if (arch != get_elf_backend_data (abfd)->arch
7703 && arch != bfd_arch_unknown
7704 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
7707 return bfd_default_set_arch_mach (abfd, arch, machine);
7710 /* Find the nearest line to a particular section and offset,
7711 for error reporting. */
7714 _bfd_elf_find_nearest_line (bfd *abfd,
7718 const char **filename_ptr,
7719 const char **functionname_ptr,
7720 unsigned int *line_ptr,
7721 unsigned int *discriminator_ptr)
7725 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
7726 filename_ptr, functionname_ptr,
7727 line_ptr, discriminator_ptr,
7728 dwarf_debug_sections, 0,
7729 &elf_tdata (abfd)->dwarf2_find_line_info)
7730 || _bfd_dwarf1_find_nearest_line (abfd, symbols, section, offset,
7731 filename_ptr, functionname_ptr,
7734 if (!*functionname_ptr)
7735 _bfd_elf_find_function (abfd, symbols, section, offset,
7736 *filename_ptr ? NULL : filename_ptr,
7741 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7742 &found, filename_ptr,
7743 functionname_ptr, line_ptr,
7744 &elf_tdata (abfd)->line_info))
7746 if (found && (*functionname_ptr || *line_ptr))
7749 if (symbols == NULL)
7752 if (! _bfd_elf_find_function (abfd, symbols, section, offset,
7753 filename_ptr, functionname_ptr))
7760 /* Find the line for a symbol. */
7763 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
7764 const char **filename_ptr, unsigned int *line_ptr)
7766 return _bfd_dwarf2_find_nearest_line (abfd, symbols, symbol, NULL, 0,
7767 filename_ptr, NULL, line_ptr, NULL,
7768 dwarf_debug_sections, 0,
7769 &elf_tdata (abfd)->dwarf2_find_line_info);
7772 /* After a call to bfd_find_nearest_line, successive calls to
7773 bfd_find_inliner_info can be used to get source information about
7774 each level of function inlining that terminated at the address
7775 passed to bfd_find_nearest_line. Currently this is only supported
7776 for DWARF2 with appropriate DWARF3 extensions. */
7779 _bfd_elf_find_inliner_info (bfd *abfd,
7780 const char **filename_ptr,
7781 const char **functionname_ptr,
7782 unsigned int *line_ptr)
7785 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7786 functionname_ptr, line_ptr,
7787 & elf_tdata (abfd)->dwarf2_find_line_info);
7792 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
7794 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7795 int ret = bed->s->sizeof_ehdr;
7797 if (!info->relocatable)
7799 bfd_size_type phdr_size = elf_program_header_size (abfd);
7801 if (phdr_size == (bfd_size_type) -1)
7803 struct elf_segment_map *m;
7806 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
7807 phdr_size += bed->s->sizeof_phdr;
7810 phdr_size = get_program_header_size (abfd, info);
7813 elf_program_header_size (abfd) = phdr_size;
7821 _bfd_elf_set_section_contents (bfd *abfd,
7823 const void *location,
7825 bfd_size_type count)
7827 Elf_Internal_Shdr *hdr;
7830 if (! abfd->output_has_begun
7831 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7834 hdr = &elf_section_data (section)->this_hdr;
7835 pos = hdr->sh_offset + offset;
7836 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7837 || bfd_bwrite (location, count, abfd) != count)
7844 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7845 arelent *cache_ptr ATTRIBUTE_UNUSED,
7846 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7851 /* Try to convert a non-ELF reloc into an ELF one. */
7854 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7856 /* Check whether we really have an ELF howto. */
7858 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7860 bfd_reloc_code_real_type code;
7861 reloc_howto_type *howto;
7863 /* Alien reloc: Try to determine its type to replace it with an
7864 equivalent ELF reloc. */
7866 if (areloc->howto->pc_relative)
7868 switch (areloc->howto->bitsize)
7871 code = BFD_RELOC_8_PCREL;
7874 code = BFD_RELOC_12_PCREL;
7877 code = BFD_RELOC_16_PCREL;
7880 code = BFD_RELOC_24_PCREL;
7883 code = BFD_RELOC_32_PCREL;
7886 code = BFD_RELOC_64_PCREL;
7892 howto = bfd_reloc_type_lookup (abfd, code);
7894 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7896 if (howto->pcrel_offset)
7897 areloc->addend += areloc->address;
7899 areloc->addend -= areloc->address; /* addend is unsigned!! */
7904 switch (areloc->howto->bitsize)
7910 code = BFD_RELOC_14;
7913 code = BFD_RELOC_16;
7916 code = BFD_RELOC_26;
7919 code = BFD_RELOC_32;
7922 code = BFD_RELOC_64;
7928 howto = bfd_reloc_type_lookup (abfd, code);
7932 areloc->howto = howto;
7940 (*_bfd_error_handler)
7941 (_("%B: unsupported relocation type %s"),
7942 abfd, areloc->howto->name);
7943 bfd_set_error (bfd_error_bad_value);
7948 _bfd_elf_close_and_cleanup (bfd *abfd)
7950 struct elf_obj_tdata *tdata = elf_tdata (abfd);
7951 if (bfd_get_format (abfd) == bfd_object && tdata != NULL)
7953 if (elf_tdata (abfd)->o != NULL && elf_shstrtab (abfd) != NULL)
7954 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7955 _bfd_dwarf2_cleanup_debug_info (abfd, &tdata->dwarf2_find_line_info);
7958 return _bfd_generic_close_and_cleanup (abfd);
7961 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7962 in the relocation's offset. Thus we cannot allow any sort of sanity
7963 range-checking to interfere. There is nothing else to do in processing
7966 bfd_reloc_status_type
7967 _bfd_elf_rel_vtable_reloc_fn
7968 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7969 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7970 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7971 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7973 return bfd_reloc_ok;
7976 /* Elf core file support. Much of this only works on native
7977 toolchains, since we rely on knowing the
7978 machine-dependent procfs structure in order to pick
7979 out details about the corefile. */
7981 #ifdef HAVE_SYS_PROCFS_H
7982 /* Needed for new procfs interface on sparc-solaris. */
7983 # define _STRUCTURED_PROC 1
7984 # include <sys/procfs.h>
7987 /* Return a PID that identifies a "thread" for threaded cores, or the
7988 PID of the main process for non-threaded cores. */
7991 elfcore_make_pid (bfd *abfd)
7995 pid = elf_tdata (abfd)->core->lwpid;
7997 pid = elf_tdata (abfd)->core->pid;
8002 /* If there isn't a section called NAME, make one, using
8003 data from SECT. Note, this function will generate a
8004 reference to NAME, so you shouldn't deallocate or
8008 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
8012 if (bfd_get_section_by_name (abfd, name) != NULL)
8015 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
8019 sect2->size = sect->size;
8020 sect2->filepos = sect->filepos;
8021 sect2->alignment_power = sect->alignment_power;
8025 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
8026 actually creates up to two pseudosections:
8027 - For the single-threaded case, a section named NAME, unless
8028 such a section already exists.
8029 - For the multi-threaded case, a section named "NAME/PID", where
8030 PID is elfcore_make_pid (abfd).
8031 Both pseudosections have identical contents. */
8033 _bfd_elfcore_make_pseudosection (bfd *abfd,
8039 char *threaded_name;
8043 /* Build the section name. */
8045 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
8046 len = strlen (buf) + 1;
8047 threaded_name = (char *) bfd_alloc (abfd, len);
8048 if (threaded_name == NULL)
8050 memcpy (threaded_name, buf, len);
8052 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
8057 sect->filepos = filepos;
8058 sect->alignment_power = 2;
8060 return elfcore_maybe_make_sect (abfd, name, sect);
8063 /* prstatus_t exists on:
8065 linux 2.[01] + glibc
8069 #if defined (HAVE_PRSTATUS_T)
8072 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
8077 if (note->descsz == sizeof (prstatus_t))
8081 size = sizeof (prstat.pr_reg);
8082 offset = offsetof (prstatus_t, pr_reg);
8083 memcpy (&prstat, note->descdata, sizeof (prstat));
8085 /* Do not overwrite the core signal if it
8086 has already been set by another thread. */
8087 if (elf_tdata (abfd)->core->signal == 0)
8088 elf_tdata (abfd)->core->signal = prstat.pr_cursig;
8089 if (elf_tdata (abfd)->core->pid == 0)
8090 elf_tdata (abfd)->core->pid = prstat.pr_pid;
8092 /* pr_who exists on:
8095 pr_who doesn't exist on:
8098 #if defined (HAVE_PRSTATUS_T_PR_WHO)
8099 elf_tdata (abfd)->core->lwpid = prstat.pr_who;
8101 elf_tdata (abfd)->core->lwpid = prstat.pr_pid;
8104 #if defined (HAVE_PRSTATUS32_T)
8105 else if (note->descsz == sizeof (prstatus32_t))
8107 /* 64-bit host, 32-bit corefile */
8108 prstatus32_t prstat;
8110 size = sizeof (prstat.pr_reg);
8111 offset = offsetof (prstatus32_t, pr_reg);
8112 memcpy (&prstat, note->descdata, sizeof (prstat));
8114 /* Do not overwrite the core signal if it
8115 has already been set by another thread. */
8116 if (elf_tdata (abfd)->core->signal == 0)
8117 elf_tdata (abfd)->core->signal = prstat.pr_cursig;
8118 if (elf_tdata (abfd)->core->pid == 0)
8119 elf_tdata (abfd)->core->pid = prstat.pr_pid;
8121 /* pr_who exists on:
8124 pr_who doesn't exist on:
8127 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
8128 elf_tdata (abfd)->core->lwpid = prstat.pr_who;
8130 elf_tdata (abfd)->core->lwpid = prstat.pr_pid;
8133 #endif /* HAVE_PRSTATUS32_T */
8136 /* Fail - we don't know how to handle any other
8137 note size (ie. data object type). */
8141 /* Make a ".reg/999" section and a ".reg" section. */
8142 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
8143 size, note->descpos + offset);
8145 #endif /* defined (HAVE_PRSTATUS_T) */
8147 /* Create a pseudosection containing the exact contents of NOTE. */
8149 elfcore_make_note_pseudosection (bfd *abfd,
8151 Elf_Internal_Note *note)
8153 return _bfd_elfcore_make_pseudosection (abfd, name,
8154 note->descsz, note->descpos);
8157 /* There isn't a consistent prfpregset_t across platforms,
8158 but it doesn't matter, because we don't have to pick this
8159 data structure apart. */
8162 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
8164 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8167 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
8168 type of NT_PRXFPREG. Just include the whole note's contents
8172 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
8174 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
8177 /* Linux dumps the Intel XSAVE extended state in a note named "LINUX"
8178 with a note type of NT_X86_XSTATE. Just include the whole note's
8179 contents literally. */
8182 elfcore_grok_xstatereg (bfd *abfd, Elf_Internal_Note *note)
8184 return elfcore_make_note_pseudosection (abfd, ".reg-xstate", note);
8188 elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note)
8190 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note);
8194 elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note)
8196 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note);
8200 elfcore_grok_s390_high_gprs (bfd *abfd, Elf_Internal_Note *note)
8202 return elfcore_make_note_pseudosection (abfd, ".reg-s390-high-gprs", note);
8206 elfcore_grok_s390_timer (bfd *abfd, Elf_Internal_Note *note)
8208 return elfcore_make_note_pseudosection (abfd, ".reg-s390-timer", note);
8212 elfcore_grok_s390_todcmp (bfd *abfd, Elf_Internal_Note *note)
8214 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todcmp", note);
8218 elfcore_grok_s390_todpreg (bfd *abfd, Elf_Internal_Note *note)
8220 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todpreg", note);
8224 elfcore_grok_s390_ctrs (bfd *abfd, Elf_Internal_Note *note)
8226 return elfcore_make_note_pseudosection (abfd, ".reg-s390-ctrs", note);
8230 elfcore_grok_s390_prefix (bfd *abfd, Elf_Internal_Note *note)
8232 return elfcore_make_note_pseudosection (abfd, ".reg-s390-prefix", note);
8236 elfcore_grok_s390_last_break (bfd *abfd, Elf_Internal_Note *note)
8238 return elfcore_make_note_pseudosection (abfd, ".reg-s390-last-break", note);
8242 elfcore_grok_s390_system_call (bfd *abfd, Elf_Internal_Note *note)
8244 return elfcore_make_note_pseudosection (abfd, ".reg-s390-system-call", note);
8248 elfcore_grok_s390_tdb (bfd *abfd, Elf_Internal_Note *note)
8250 return elfcore_make_note_pseudosection (abfd, ".reg-s390-tdb", note);
8254 elfcore_grok_arm_vfp (bfd *abfd, Elf_Internal_Note *note)
8256 return elfcore_make_note_pseudosection (abfd, ".reg-arm-vfp", note);
8260 elfcore_grok_aarch_tls (bfd *abfd, Elf_Internal_Note *note)
8262 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-tls", note);
8266 elfcore_grok_aarch_hw_break (bfd *abfd, Elf_Internal_Note *note)
8268 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-break", note);
8272 elfcore_grok_aarch_hw_watch (bfd *abfd, Elf_Internal_Note *note)
8274 return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-watch", note);
8277 #if defined (HAVE_PRPSINFO_T)
8278 typedef prpsinfo_t elfcore_psinfo_t;
8279 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
8280 typedef prpsinfo32_t elfcore_psinfo32_t;
8284 #if defined (HAVE_PSINFO_T)
8285 typedef psinfo_t elfcore_psinfo_t;
8286 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
8287 typedef psinfo32_t elfcore_psinfo32_t;
8291 /* return a malloc'ed copy of a string at START which is at
8292 most MAX bytes long, possibly without a terminating '\0'.
8293 the copy will always have a terminating '\0'. */
8296 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
8299 char *end = (char *) memchr (start, '\0', max);
8307 dups = (char *) bfd_alloc (abfd, len + 1);
8311 memcpy (dups, start, len);
8317 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8319 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
8321 if (note->descsz == sizeof (elfcore_psinfo_t))
8323 elfcore_psinfo_t psinfo;
8325 memcpy (&psinfo, note->descdata, sizeof (psinfo));
8327 #if defined (HAVE_PSINFO_T_PR_PID) || defined (HAVE_PRPSINFO_T_PR_PID)
8328 elf_tdata (abfd)->core->pid = psinfo.pr_pid;
8330 elf_tdata (abfd)->core->program
8331 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
8332 sizeof (psinfo.pr_fname));
8334 elf_tdata (abfd)->core->command
8335 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
8336 sizeof (psinfo.pr_psargs));
8338 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8339 else if (note->descsz == sizeof (elfcore_psinfo32_t))
8341 /* 64-bit host, 32-bit corefile */
8342 elfcore_psinfo32_t psinfo;
8344 memcpy (&psinfo, note->descdata, sizeof (psinfo));
8346 #if defined (HAVE_PSINFO32_T_PR_PID) || defined (HAVE_PRPSINFO32_T_PR_PID)
8347 elf_tdata (abfd)->core->pid = psinfo.pr_pid;
8349 elf_tdata (abfd)->core->program
8350 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
8351 sizeof (psinfo.pr_fname));
8353 elf_tdata (abfd)->core->command
8354 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
8355 sizeof (psinfo.pr_psargs));
8361 /* Fail - we don't know how to handle any other
8362 note size (ie. data object type). */
8366 /* Note that for some reason, a spurious space is tacked
8367 onto the end of the args in some (at least one anyway)
8368 implementations, so strip it off if it exists. */
8371 char *command = elf_tdata (abfd)->core->command;
8372 int n = strlen (command);
8374 if (0 < n && command[n - 1] == ' ')
8375 command[n - 1] = '\0';
8380 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
8382 #if defined (HAVE_PSTATUS_T)
8384 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
8386 if (note->descsz == sizeof (pstatus_t)
8387 #if defined (HAVE_PXSTATUS_T)
8388 || note->descsz == sizeof (pxstatus_t)
8394 memcpy (&pstat, note->descdata, sizeof (pstat));
8396 elf_tdata (abfd)->core->pid = pstat.pr_pid;
8398 #if defined (HAVE_PSTATUS32_T)
8399 else if (note->descsz == sizeof (pstatus32_t))
8401 /* 64-bit host, 32-bit corefile */
8404 memcpy (&pstat, note->descdata, sizeof (pstat));
8406 elf_tdata (abfd)->core->pid = pstat.pr_pid;
8409 /* Could grab some more details from the "representative"
8410 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
8411 NT_LWPSTATUS note, presumably. */
8415 #endif /* defined (HAVE_PSTATUS_T) */
8417 #if defined (HAVE_LWPSTATUS_T)
8419 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
8421 lwpstatus_t lwpstat;
8427 if (note->descsz != sizeof (lwpstat)
8428 #if defined (HAVE_LWPXSTATUS_T)
8429 && note->descsz != sizeof (lwpxstatus_t)
8434 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
8436 elf_tdata (abfd)->core->lwpid = lwpstat.pr_lwpid;
8437 /* Do not overwrite the core signal if it has already been set by
8439 if (elf_tdata (abfd)->core->signal == 0)
8440 elf_tdata (abfd)->core->signal = lwpstat.pr_cursig;
8442 /* Make a ".reg/999" section. */
8444 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
8445 len = strlen (buf) + 1;
8446 name = bfd_alloc (abfd, len);
8449 memcpy (name, buf, len);
8451 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8455 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8456 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
8457 sect->filepos = note->descpos
8458 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
8461 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8462 sect->size = sizeof (lwpstat.pr_reg);
8463 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
8466 sect->alignment_power = 2;
8468 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
8471 /* Make a ".reg2/999" section */
8473 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
8474 len = strlen (buf) + 1;
8475 name = bfd_alloc (abfd, len);
8478 memcpy (name, buf, len);
8480 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8484 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8485 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
8486 sect->filepos = note->descpos
8487 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
8490 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
8491 sect->size = sizeof (lwpstat.pr_fpreg);
8492 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
8495 sect->alignment_power = 2;
8497 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
8499 #endif /* defined (HAVE_LWPSTATUS_T) */
8502 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
8509 int is_active_thread;
8512 if (note->descsz < 728)
8515 if (! CONST_STRNEQ (note->namedata, "win32"))
8518 type = bfd_get_32 (abfd, note->descdata);
8522 case 1 /* NOTE_INFO_PROCESS */:
8523 /* FIXME: need to add ->core->command. */
8524 /* process_info.pid */
8525 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 8);
8526 /* process_info.signal */
8527 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 12);
8530 case 2 /* NOTE_INFO_THREAD */:
8531 /* Make a ".reg/999" section. */
8532 /* thread_info.tid */
8533 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
8535 len = strlen (buf) + 1;
8536 name = (char *) bfd_alloc (abfd, len);
8540 memcpy (name, buf, len);
8542 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8546 /* sizeof (thread_info.thread_context) */
8548 /* offsetof (thread_info.thread_context) */
8549 sect->filepos = note->descpos + 12;
8550 sect->alignment_power = 2;
8552 /* thread_info.is_active_thread */
8553 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
8555 if (is_active_thread)
8556 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
8560 case 3 /* NOTE_INFO_MODULE */:
8561 /* Make a ".module/xxxxxxxx" section. */
8562 /* module_info.base_address */
8563 base_addr = bfd_get_32 (abfd, note->descdata + 4);
8564 sprintf (buf, ".module/%08lx", (unsigned long) base_addr);
8566 len = strlen (buf) + 1;
8567 name = (char *) bfd_alloc (abfd, len);
8571 memcpy (name, buf, len);
8573 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8578 sect->size = note->descsz;
8579 sect->filepos = note->descpos;
8580 sect->alignment_power = 2;
8591 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
8593 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8601 if (bed->elf_backend_grok_prstatus)
8602 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
8604 #if defined (HAVE_PRSTATUS_T)
8605 return elfcore_grok_prstatus (abfd, note);
8610 #if defined (HAVE_PSTATUS_T)
8612 return elfcore_grok_pstatus (abfd, note);
8615 #if defined (HAVE_LWPSTATUS_T)
8617 return elfcore_grok_lwpstatus (abfd, note);
8620 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
8621 return elfcore_grok_prfpreg (abfd, note);
8623 case NT_WIN32PSTATUS:
8624 return elfcore_grok_win32pstatus (abfd, note);
8626 case NT_PRXFPREG: /* Linux SSE extension */
8627 if (note->namesz == 6
8628 && strcmp (note->namedata, "LINUX") == 0)
8629 return elfcore_grok_prxfpreg (abfd, note);
8633 case NT_X86_XSTATE: /* Linux XSAVE extension */
8634 if (note->namesz == 6
8635 && strcmp (note->namedata, "LINUX") == 0)
8636 return elfcore_grok_xstatereg (abfd, note);
8641 if (note->namesz == 6
8642 && strcmp (note->namedata, "LINUX") == 0)
8643 return elfcore_grok_ppc_vmx (abfd, note);
8648 if (note->namesz == 6
8649 && strcmp (note->namedata, "LINUX") == 0)
8650 return elfcore_grok_ppc_vsx (abfd, note);
8654 case NT_S390_HIGH_GPRS:
8655 if (note->namesz == 6
8656 && strcmp (note->namedata, "LINUX") == 0)
8657 return elfcore_grok_s390_high_gprs (abfd, note);
8662 if (note->namesz == 6
8663 && strcmp (note->namedata, "LINUX") == 0)
8664 return elfcore_grok_s390_timer (abfd, note);
8668 case NT_S390_TODCMP:
8669 if (note->namesz == 6
8670 && strcmp (note->namedata, "LINUX") == 0)
8671 return elfcore_grok_s390_todcmp (abfd, note);
8675 case NT_S390_TODPREG:
8676 if (note->namesz == 6
8677 && strcmp (note->namedata, "LINUX") == 0)
8678 return elfcore_grok_s390_todpreg (abfd, note);
8683 if (note->namesz == 6
8684 && strcmp (note->namedata, "LINUX") == 0)
8685 return elfcore_grok_s390_ctrs (abfd, note);
8689 case NT_S390_PREFIX:
8690 if (note->namesz == 6
8691 && strcmp (note->namedata, "LINUX") == 0)
8692 return elfcore_grok_s390_prefix (abfd, note);
8696 case NT_S390_LAST_BREAK:
8697 if (note->namesz == 6
8698 && strcmp (note->namedata, "LINUX") == 0)
8699 return elfcore_grok_s390_last_break (abfd, note);
8703 case NT_S390_SYSTEM_CALL:
8704 if (note->namesz == 6
8705 && strcmp (note->namedata, "LINUX") == 0)
8706 return elfcore_grok_s390_system_call (abfd, note);
8711 if (note->namesz == 6
8712 && strcmp (note->namedata, "LINUX") == 0)
8713 return elfcore_grok_s390_tdb (abfd, note);
8718 if (note->namesz == 6
8719 && strcmp (note->namedata, "LINUX") == 0)
8720 return elfcore_grok_arm_vfp (abfd, note);
8725 if (note->namesz == 6
8726 && strcmp (note->namedata, "LINUX") == 0)
8727 return elfcore_grok_aarch_tls (abfd, note);
8731 case NT_ARM_HW_BREAK:
8732 if (note->namesz == 6
8733 && strcmp (note->namedata, "LINUX") == 0)
8734 return elfcore_grok_aarch_hw_break (abfd, note);
8738 case NT_ARM_HW_WATCH:
8739 if (note->namesz == 6
8740 && strcmp (note->namedata, "LINUX") == 0)
8741 return elfcore_grok_aarch_hw_watch (abfd, note);
8747 if (bed->elf_backend_grok_psinfo)
8748 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
8750 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8751 return elfcore_grok_psinfo (abfd, note);
8758 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8763 sect->size = note->descsz;
8764 sect->filepos = note->descpos;
8765 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8771 return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.file",
8775 return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.siginfo",
8781 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
8783 struct elf_obj_tdata *t;
8785 if (note->descsz == 0)
8788 t = elf_tdata (abfd);
8789 t->build_id = bfd_alloc (abfd, sizeof (*t->build_id) - 1 + note->descsz);
8790 if (t->build_id == NULL)
8793 t->build_id->size = note->descsz;
8794 memcpy (t->build_id->data, note->descdata, note->descsz);
8800 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
8807 case NT_GNU_BUILD_ID:
8808 return elfobj_grok_gnu_build_id (abfd, note);
8813 elfobj_grok_stapsdt_note_1 (bfd *abfd, Elf_Internal_Note *note)
8815 struct sdt_note *cur =
8816 (struct sdt_note *) bfd_alloc (abfd, sizeof (struct sdt_note)
8819 cur->next = (struct sdt_note *) (elf_tdata (abfd))->sdt_note_head;
8820 cur->size = (bfd_size_type) note->descsz;
8821 memcpy (cur->data, note->descdata, note->descsz);
8823 elf_tdata (abfd)->sdt_note_head = cur;
8829 elfobj_grok_stapsdt_note (bfd *abfd, Elf_Internal_Note *note)
8834 return elfobj_grok_stapsdt_note_1 (abfd, note);
8842 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
8846 cp = strchr (note->namedata, '@');
8849 *lwpidp = atoi(cp + 1);
8856 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8858 /* Signal number at offset 0x08. */
8859 elf_tdata (abfd)->core->signal
8860 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8862 /* Process ID at offset 0x50. */
8863 elf_tdata (abfd)->core->pid
8864 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
8866 /* Command name at 0x7c (max 32 bytes, including nul). */
8867 elf_tdata (abfd)->core->command
8868 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
8870 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
8875 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
8879 if (elfcore_netbsd_get_lwpid (note, &lwp))
8880 elf_tdata (abfd)->core->lwpid = lwp;
8882 if (note->type == NT_NETBSDCORE_PROCINFO)
8884 /* NetBSD-specific core "procinfo". Note that we expect to
8885 find this note before any of the others, which is fine,
8886 since the kernel writes this note out first when it
8887 creates a core file. */
8889 return elfcore_grok_netbsd_procinfo (abfd, note);
8892 /* As of Jan 2002 there are no other machine-independent notes
8893 defined for NetBSD core files. If the note type is less
8894 than the start of the machine-dependent note types, we don't
8897 if (note->type < NT_NETBSDCORE_FIRSTMACH)
8901 switch (bfd_get_arch (abfd))
8903 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
8904 PT_GETFPREGS == mach+2. */
8906 case bfd_arch_alpha:
8907 case bfd_arch_sparc:
8910 case NT_NETBSDCORE_FIRSTMACH+0:
8911 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8913 case NT_NETBSDCORE_FIRSTMACH+2:
8914 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8920 /* On all other arch's, PT_GETREGS == mach+1 and
8921 PT_GETFPREGS == mach+3. */
8926 case NT_NETBSDCORE_FIRSTMACH+1:
8927 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8929 case NT_NETBSDCORE_FIRSTMACH+3:
8930 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8940 elfcore_grok_openbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8942 /* Signal number at offset 0x08. */
8943 elf_tdata (abfd)->core->signal
8944 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8946 /* Process ID at offset 0x20. */
8947 elf_tdata (abfd)->core->pid
8948 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x20);
8950 /* Command name at 0x48 (max 32 bytes, including nul). */
8951 elf_tdata (abfd)->core->command
8952 = _bfd_elfcore_strndup (abfd, note->descdata + 0x48, 31);
8958 elfcore_grok_openbsd_note (bfd *abfd, Elf_Internal_Note *note)
8960 if (note->type == NT_OPENBSD_PROCINFO)
8961 return elfcore_grok_openbsd_procinfo (abfd, note);
8963 if (note->type == NT_OPENBSD_REGS)
8964 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8966 if (note->type == NT_OPENBSD_FPREGS)
8967 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8969 if (note->type == NT_OPENBSD_XFPREGS)
8970 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
8972 if (note->type == NT_OPENBSD_AUXV)
8974 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8979 sect->size = note->descsz;
8980 sect->filepos = note->descpos;
8981 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8986 if (note->type == NT_OPENBSD_WCOOKIE)
8988 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
8993 sect->size = note->descsz;
8994 sect->filepos = note->descpos;
8995 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
9004 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
9006 void *ddata = note->descdata;
9013 /* nto_procfs_status 'pid' field is at offset 0. */
9014 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
9016 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
9017 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
9019 /* nto_procfs_status 'flags' field is at offset 8. */
9020 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
9022 /* nto_procfs_status 'what' field is at offset 14. */
9023 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
9025 elf_tdata (abfd)->core->signal = sig;
9026 elf_tdata (abfd)->core->lwpid = *tid;
9029 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
9030 do not come from signals so we make sure we set the current
9031 thread just in case. */
9032 if (flags & 0x00000080)
9033 elf_tdata (abfd)->core->lwpid = *tid;
9035 /* Make a ".qnx_core_status/%d" section. */
9036 sprintf (buf, ".qnx_core_status/%ld", *tid);
9038 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
9043 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9047 sect->size = note->descsz;
9048 sect->filepos = note->descpos;
9049 sect->alignment_power = 2;
9051 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
9055 elfcore_grok_nto_regs (bfd *abfd,
9056 Elf_Internal_Note *note,
9064 /* Make a "(base)/%d" section. */
9065 sprintf (buf, "%s/%ld", base, tid);
9067 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
9072 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9076 sect->size = note->descsz;
9077 sect->filepos = note->descpos;
9078 sect->alignment_power = 2;
9080 /* This is the current thread. */
9081 if (elf_tdata (abfd)->core->lwpid == tid)
9082 return elfcore_maybe_make_sect (abfd, base, sect);
9087 #define BFD_QNT_CORE_INFO 7
9088 #define BFD_QNT_CORE_STATUS 8
9089 #define BFD_QNT_CORE_GREG 9
9090 #define BFD_QNT_CORE_FPREG 10
9093 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
9095 /* Every GREG section has a STATUS section before it. Store the
9096 tid from the previous call to pass down to the next gregs
9098 static long tid = 1;
9102 case BFD_QNT_CORE_INFO:
9103 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
9104 case BFD_QNT_CORE_STATUS:
9105 return elfcore_grok_nto_status (abfd, note, &tid);
9106 case BFD_QNT_CORE_GREG:
9107 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
9108 case BFD_QNT_CORE_FPREG:
9109 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
9116 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
9122 /* Use note name as section name. */
9124 name = (char *) bfd_alloc (abfd, len);
9127 memcpy (name, note->namedata, len);
9128 name[len - 1] = '\0';
9130 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
9134 sect->size = note->descsz;
9135 sect->filepos = note->descpos;
9136 sect->alignment_power = 1;
9141 /* Function: elfcore_write_note
9144 buffer to hold note, and current size of buffer
9148 size of data for note
9150 Writes note to end of buffer. ELF64 notes are written exactly as
9151 for ELF32, despite the current (as of 2006) ELF gabi specifying
9152 that they ought to have 8-byte namesz and descsz field, and have
9153 8-byte alignment. Other writers, eg. Linux kernel, do the same.
9156 Pointer to realloc'd buffer, *BUFSIZ updated. */
9159 elfcore_write_note (bfd *abfd,
9167 Elf_External_Note *xnp;
9174 namesz = strlen (name) + 1;
9176 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
9178 buf = (char *) realloc (buf, *bufsiz + newspace);
9181 dest = buf + *bufsiz;
9182 *bufsiz += newspace;
9183 xnp = (Elf_External_Note *) dest;
9184 H_PUT_32 (abfd, namesz, xnp->namesz);
9185 H_PUT_32 (abfd, size, xnp->descsz);
9186 H_PUT_32 (abfd, type, xnp->type);
9190 memcpy (dest, name, namesz);
9198 memcpy (dest, input, size);
9209 elfcore_write_prpsinfo (bfd *abfd,
9215 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9217 if (bed->elf_backend_write_core_note != NULL)
9220 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
9221 NT_PRPSINFO, fname, psargs);
9226 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
9227 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
9228 if (bed->s->elfclass == ELFCLASS32)
9230 #if defined (HAVE_PSINFO32_T)
9232 int note_type = NT_PSINFO;
9235 int note_type = NT_PRPSINFO;
9238 memset (&data, 0, sizeof (data));
9239 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
9240 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
9241 return elfcore_write_note (abfd, buf, bufsiz,
9242 "CORE", note_type, &data, sizeof (data));
9247 #if defined (HAVE_PSINFO_T)
9249 int note_type = NT_PSINFO;
9252 int note_type = NT_PRPSINFO;
9255 memset (&data, 0, sizeof (data));
9256 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
9257 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
9258 return elfcore_write_note (abfd, buf, bufsiz,
9259 "CORE", note_type, &data, sizeof (data));
9261 #endif /* PSINFO_T or PRPSINFO_T */
9268 elfcore_write_linux_prpsinfo32
9269 (bfd *abfd, char *buf, int *bufsiz,
9270 const struct elf_internal_linux_prpsinfo *prpsinfo)
9272 struct elf_external_linux_prpsinfo32 data;
9274 memset (&data, 0, sizeof (data));
9275 LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data);
9277 return elfcore_write_note (abfd, buf, bufsiz, "CORE", NT_PRPSINFO,
9278 &data, sizeof (data));
9282 elfcore_write_linux_prpsinfo64
9283 (bfd *abfd, char *buf, int *bufsiz,
9284 const struct elf_internal_linux_prpsinfo *prpsinfo)
9286 struct elf_external_linux_prpsinfo64 data;
9288 memset (&data, 0, sizeof (data));
9289 LINUX_PRPSINFO64_SWAP_FIELDS (abfd, prpsinfo, data);
9291 return elfcore_write_note (abfd, buf, bufsiz,
9292 "CORE", NT_PRPSINFO, &data, sizeof (data));
9296 elfcore_write_prstatus (bfd *abfd,
9303 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9305 if (bed->elf_backend_write_core_note != NULL)
9308 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
9310 pid, cursig, gregs);
9315 #if defined (HAVE_PRSTATUS_T)
9316 #if defined (HAVE_PRSTATUS32_T)
9317 if (bed->s->elfclass == ELFCLASS32)
9319 prstatus32_t prstat;
9321 memset (&prstat, 0, sizeof (prstat));
9322 prstat.pr_pid = pid;
9323 prstat.pr_cursig = cursig;
9324 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
9325 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
9326 NT_PRSTATUS, &prstat, sizeof (prstat));
9333 memset (&prstat, 0, sizeof (prstat));
9334 prstat.pr_pid = pid;
9335 prstat.pr_cursig = cursig;
9336 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
9337 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
9338 NT_PRSTATUS, &prstat, sizeof (prstat));
9340 #endif /* HAVE_PRSTATUS_T */
9346 #if defined (HAVE_LWPSTATUS_T)
9348 elfcore_write_lwpstatus (bfd *abfd,
9355 lwpstatus_t lwpstat;
9356 const char *note_name = "CORE";
9358 memset (&lwpstat, 0, sizeof (lwpstat));
9359 lwpstat.pr_lwpid = pid >> 16;
9360 lwpstat.pr_cursig = cursig;
9361 #if defined (HAVE_LWPSTATUS_T_PR_REG)
9362 memcpy (&lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
9363 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
9365 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
9366 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
9368 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
9369 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
9372 return elfcore_write_note (abfd, buf, bufsiz, note_name,
9373 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
9375 #endif /* HAVE_LWPSTATUS_T */
9377 #if defined (HAVE_PSTATUS_T)
9379 elfcore_write_pstatus (bfd *abfd,
9383 int cursig ATTRIBUTE_UNUSED,
9384 const void *gregs ATTRIBUTE_UNUSED)
9386 const char *note_name = "CORE";
9387 #if defined (HAVE_PSTATUS32_T)
9388 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9390 if (bed->s->elfclass == ELFCLASS32)
9394 memset (&pstat, 0, sizeof (pstat));
9395 pstat.pr_pid = pid & 0xffff;
9396 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
9397 NT_PSTATUS, &pstat, sizeof (pstat));
9405 memset (&pstat, 0, sizeof (pstat));
9406 pstat.pr_pid = pid & 0xffff;
9407 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
9408 NT_PSTATUS, &pstat, sizeof (pstat));
9412 #endif /* HAVE_PSTATUS_T */
9415 elfcore_write_prfpreg (bfd *abfd,
9421 const char *note_name = "CORE";
9422 return elfcore_write_note (abfd, buf, bufsiz,
9423 note_name, NT_FPREGSET, fpregs, size);
9427 elfcore_write_prxfpreg (bfd *abfd,
9430 const void *xfpregs,
9433 char *note_name = "LINUX";
9434 return elfcore_write_note (abfd, buf, bufsiz,
9435 note_name, NT_PRXFPREG, xfpregs, size);
9439 elfcore_write_xstatereg (bfd *abfd, char *buf, int *bufsiz,
9440 const void *xfpregs, int size)
9442 char *note_name = "LINUX";
9443 return elfcore_write_note (abfd, buf, bufsiz,
9444 note_name, NT_X86_XSTATE, xfpregs, size);
9448 elfcore_write_ppc_vmx (bfd *abfd,
9451 const void *ppc_vmx,
9454 char *note_name = "LINUX";
9455 return elfcore_write_note (abfd, buf, bufsiz,
9456 note_name, NT_PPC_VMX, ppc_vmx, size);
9460 elfcore_write_ppc_vsx (bfd *abfd,
9463 const void *ppc_vsx,
9466 char *note_name = "LINUX";
9467 return elfcore_write_note (abfd, buf, bufsiz,
9468 note_name, NT_PPC_VSX, ppc_vsx, size);
9472 elfcore_write_s390_high_gprs (bfd *abfd,
9475 const void *s390_high_gprs,
9478 char *note_name = "LINUX";
9479 return elfcore_write_note (abfd, buf, bufsiz,
9480 note_name, NT_S390_HIGH_GPRS,
9481 s390_high_gprs, size);
9485 elfcore_write_s390_timer (bfd *abfd,
9488 const void *s390_timer,
9491 char *note_name = "LINUX";
9492 return elfcore_write_note (abfd, buf, bufsiz,
9493 note_name, NT_S390_TIMER, s390_timer, size);
9497 elfcore_write_s390_todcmp (bfd *abfd,
9500 const void *s390_todcmp,
9503 char *note_name = "LINUX";
9504 return elfcore_write_note (abfd, buf, bufsiz,
9505 note_name, NT_S390_TODCMP, s390_todcmp, size);
9509 elfcore_write_s390_todpreg (bfd *abfd,
9512 const void *s390_todpreg,
9515 char *note_name = "LINUX";
9516 return elfcore_write_note (abfd, buf, bufsiz,
9517 note_name, NT_S390_TODPREG, s390_todpreg, size);
9521 elfcore_write_s390_ctrs (bfd *abfd,
9524 const void *s390_ctrs,
9527 char *note_name = "LINUX";
9528 return elfcore_write_note (abfd, buf, bufsiz,
9529 note_name, NT_S390_CTRS, s390_ctrs, size);
9533 elfcore_write_s390_prefix (bfd *abfd,
9536 const void *s390_prefix,
9539 char *note_name = "LINUX";
9540 return elfcore_write_note (abfd, buf, bufsiz,
9541 note_name, NT_S390_PREFIX, s390_prefix, size);
9545 elfcore_write_s390_last_break (bfd *abfd,
9548 const void *s390_last_break,
9551 char *note_name = "LINUX";
9552 return elfcore_write_note (abfd, buf, bufsiz,
9553 note_name, NT_S390_LAST_BREAK,
9554 s390_last_break, size);
9558 elfcore_write_s390_system_call (bfd *abfd,
9561 const void *s390_system_call,
9564 char *note_name = "LINUX";
9565 return elfcore_write_note (abfd, buf, bufsiz,
9566 note_name, NT_S390_SYSTEM_CALL,
9567 s390_system_call, size);
9571 elfcore_write_s390_tdb (bfd *abfd,
9574 const void *s390_tdb,
9577 char *note_name = "LINUX";
9578 return elfcore_write_note (abfd, buf, bufsiz,
9579 note_name, NT_S390_TDB, s390_tdb, size);
9583 elfcore_write_arm_vfp (bfd *abfd,
9586 const void *arm_vfp,
9589 char *note_name = "LINUX";
9590 return elfcore_write_note (abfd, buf, bufsiz,
9591 note_name, NT_ARM_VFP, arm_vfp, size);
9595 elfcore_write_aarch_tls (bfd *abfd,
9598 const void *aarch_tls,
9601 char *note_name = "LINUX";
9602 return elfcore_write_note (abfd, buf, bufsiz,
9603 note_name, NT_ARM_TLS, aarch_tls, size);
9607 elfcore_write_aarch_hw_break (bfd *abfd,
9610 const void *aarch_hw_break,
9613 char *note_name = "LINUX";
9614 return elfcore_write_note (abfd, buf, bufsiz,
9615 note_name, NT_ARM_HW_BREAK, aarch_hw_break, size);
9619 elfcore_write_aarch_hw_watch (bfd *abfd,
9622 const void *aarch_hw_watch,
9625 char *note_name = "LINUX";
9626 return elfcore_write_note (abfd, buf, bufsiz,
9627 note_name, NT_ARM_HW_WATCH, aarch_hw_watch, size);
9631 elfcore_write_register_note (bfd *abfd,
9634 const char *section,
9638 if (strcmp (section, ".reg2") == 0)
9639 return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size);
9640 if (strcmp (section, ".reg-xfp") == 0)
9641 return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
9642 if (strcmp (section, ".reg-xstate") == 0)
9643 return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size);
9644 if (strcmp (section, ".reg-ppc-vmx") == 0)
9645 return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
9646 if (strcmp (section, ".reg-ppc-vsx") == 0)
9647 return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size);
9648 if (strcmp (section, ".reg-s390-high-gprs") == 0)
9649 return elfcore_write_s390_high_gprs (abfd, buf, bufsiz, data, size);
9650 if (strcmp (section, ".reg-s390-timer") == 0)
9651 return elfcore_write_s390_timer (abfd, buf, bufsiz, data, size);
9652 if (strcmp (section, ".reg-s390-todcmp") == 0)
9653 return elfcore_write_s390_todcmp (abfd, buf, bufsiz, data, size);
9654 if (strcmp (section, ".reg-s390-todpreg") == 0)
9655 return elfcore_write_s390_todpreg (abfd, buf, bufsiz, data, size);
9656 if (strcmp (section, ".reg-s390-ctrs") == 0)
9657 return elfcore_write_s390_ctrs (abfd, buf, bufsiz, data, size);
9658 if (strcmp (section, ".reg-s390-prefix") == 0)
9659 return elfcore_write_s390_prefix (abfd, buf, bufsiz, data, size);
9660 if (strcmp (section, ".reg-s390-last-break") == 0)
9661 return elfcore_write_s390_last_break (abfd, buf, bufsiz, data, size);
9662 if (strcmp (section, ".reg-s390-system-call") == 0)
9663 return elfcore_write_s390_system_call (abfd, buf, bufsiz, data, size);
9664 if (strcmp (section, ".reg-s390-tdb") == 0)
9665 return elfcore_write_s390_tdb (abfd, buf, bufsiz, data, size);
9666 if (strcmp (section, ".reg-arm-vfp") == 0)
9667 return elfcore_write_arm_vfp (abfd, buf, bufsiz, data, size);
9668 if (strcmp (section, ".reg-aarch-tls") == 0)
9669 return elfcore_write_aarch_tls (abfd, buf, bufsiz, data, size);
9670 if (strcmp (section, ".reg-aarch-hw-break") == 0)
9671 return elfcore_write_aarch_hw_break (abfd, buf, bufsiz, data, size);
9672 if (strcmp (section, ".reg-aarch-hw-watch") == 0)
9673 return elfcore_write_aarch_hw_watch (abfd, buf, bufsiz, data, size);
9678 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
9683 while (p < buf + size)
9685 /* FIXME: bad alignment assumption. */
9686 Elf_External_Note *xnp = (Elf_External_Note *) p;
9687 Elf_Internal_Note in;
9689 if (offsetof (Elf_External_Note, name) > buf - p + size)
9692 in.type = H_GET_32 (abfd, xnp->type);
9694 in.namesz = H_GET_32 (abfd, xnp->namesz);
9695 in.namedata = xnp->name;
9696 if (in.namesz > buf - in.namedata + size)
9699 in.descsz = H_GET_32 (abfd, xnp->descsz);
9700 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
9701 in.descpos = offset + (in.descdata - buf);
9703 && (in.descdata >= buf + size
9704 || in.descsz > buf - in.descdata + size))
9707 switch (bfd_get_format (abfd))
9714 #define GROKER_ELEMENT(S,F) {S, sizeof (S) - 1, F}
9717 const char * string;
9719 bfd_boolean (* func)(bfd *, Elf_Internal_Note *);
9723 GROKER_ELEMENT ("", elfcore_grok_note),
9724 GROKER_ELEMENT ("NetBSD-CORE", elfcore_grok_netbsd_note),
9725 GROKER_ELEMENT ( "OpenBSD", elfcore_grok_openbsd_note),
9726 GROKER_ELEMENT ("QNX", elfcore_grok_nto_note),
9727 GROKER_ELEMENT ("SPU/", elfcore_grok_spu_note)
9729 #undef GROKER_ELEMENT
9732 for (i = ARRAY_SIZE (grokers); i--;)
9734 if (in.namesz >= grokers[i].len
9735 && strncmp (in.namedata, grokers[i].string,
9736 grokers[i].len) == 0)
9738 if (! grokers[i].func (abfd, & in))
9747 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
9749 if (! elfobj_grok_gnu_note (abfd, &in))
9752 else if (in.namesz == sizeof "stapsdt"
9753 && strcmp (in.namedata, "stapsdt") == 0)
9755 if (! elfobj_grok_stapsdt_note (abfd, &in))
9761 p = in.descdata + BFD_ALIGN (in.descsz, 4);
9768 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
9775 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
9778 buf = (char *) bfd_malloc (size + 1);
9782 /* PR 17512: file: ec08f814
9783 0-termintate the buffer so that string searches will not overflow. */
9786 if (bfd_bread (buf, size, abfd) != size
9787 || !elf_parse_notes (abfd, buf, size, offset))
9797 /* Providing external access to the ELF program header table. */
9799 /* Return an upper bound on the number of bytes required to store a
9800 copy of ABFD's program header table entries. Return -1 if an error
9801 occurs; bfd_get_error will return an appropriate code. */
9804 bfd_get_elf_phdr_upper_bound (bfd *abfd)
9806 if (abfd->xvec->flavour != bfd_target_elf_flavour)
9808 bfd_set_error (bfd_error_wrong_format);
9812 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
9815 /* Copy ABFD's program header table entries to *PHDRS. The entries
9816 will be stored as an array of Elf_Internal_Phdr structures, as
9817 defined in include/elf/internal.h. To find out how large the
9818 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
9820 Return the number of program header table entries read, or -1 if an
9821 error occurs; bfd_get_error will return an appropriate code. */
9824 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
9828 if (abfd->xvec->flavour != bfd_target_elf_flavour)
9830 bfd_set_error (bfd_error_wrong_format);
9834 num_phdrs = elf_elfheader (abfd)->e_phnum;
9835 memcpy (phdrs, elf_tdata (abfd)->phdr,
9836 num_phdrs * sizeof (Elf_Internal_Phdr));
9841 enum elf_reloc_type_class
9842 _bfd_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
9843 const asection *rel_sec ATTRIBUTE_UNUSED,
9844 const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
9846 return reloc_class_normal;
9849 /* For RELA architectures, return the relocation value for a
9850 relocation against a local symbol. */
9853 _bfd_elf_rela_local_sym (bfd *abfd,
9854 Elf_Internal_Sym *sym,
9856 Elf_Internal_Rela *rel)
9858 asection *sec = *psec;
9861 relocation = (sec->output_section->vma
9862 + sec->output_offset
9864 if ((sec->flags & SEC_MERGE)
9865 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
9866 && sec->sec_info_type == SEC_INFO_TYPE_MERGE)
9869 _bfd_merged_section_offset (abfd, psec,
9870 elf_section_data (sec)->sec_info,
9871 sym->st_value + rel->r_addend);
9874 /* If we have changed the section, and our original section is
9875 marked with SEC_EXCLUDE, it means that the original
9876 SEC_MERGE section has been completely subsumed in some
9877 other SEC_MERGE section. In this case, we need to leave
9878 some info around for --emit-relocs. */
9879 if ((sec->flags & SEC_EXCLUDE) != 0)
9880 sec->kept_section = *psec;
9883 rel->r_addend -= relocation;
9884 rel->r_addend += sec->output_section->vma + sec->output_offset;
9890 _bfd_elf_rel_local_sym (bfd *abfd,
9891 Elf_Internal_Sym *sym,
9895 asection *sec = *psec;
9897 if (sec->sec_info_type != SEC_INFO_TYPE_MERGE)
9898 return sym->st_value + addend;
9900 return _bfd_merged_section_offset (abfd, psec,
9901 elf_section_data (sec)->sec_info,
9902 sym->st_value + addend);
9906 _bfd_elf_section_offset (bfd *abfd,
9907 struct bfd_link_info *info,
9911 switch (sec->sec_info_type)
9913 case SEC_INFO_TYPE_STABS:
9914 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
9916 case SEC_INFO_TYPE_EH_FRAME:
9917 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
9919 if ((sec->flags & SEC_ELF_REVERSE_COPY) != 0)
9921 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9922 bfd_size_type address_size = bed->s->arch_size / 8;
9923 offset = sec->size - offset - address_size;
9929 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
9930 reconstruct an ELF file by reading the segments out of remote memory
9931 based on the ELF file header at EHDR_VMA and the ELF program headers it
9932 points to. If not null, *LOADBASEP is filled in with the difference
9933 between the VMAs from which the segments were read, and the VMAs the
9934 file headers (and hence BFD's idea of each section's VMA) put them at.
9936 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
9937 remote memory at target address VMA into the local buffer at MYADDR; it
9938 should return zero on success or an `errno' code on failure. TEMPL must
9939 be a BFD for an ELF target with the word size and byte order found in
9940 the remote memory. */
9943 bfd_elf_bfd_from_remote_memory
9948 int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type))
9950 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
9951 (templ, ehdr_vma, size, loadbasep, target_read_memory);
9955 _bfd_elf_get_synthetic_symtab (bfd *abfd,
9956 long symcount ATTRIBUTE_UNUSED,
9957 asymbol **syms ATTRIBUTE_UNUSED,
9962 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9965 const char *relplt_name;
9966 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
9970 Elf_Internal_Shdr *hdr;
9976 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
9979 if (dynsymcount <= 0)
9982 if (!bed->plt_sym_val)
9985 relplt_name = bed->relplt_name;
9986 if (relplt_name == NULL)
9987 relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt";
9988 relplt = bfd_get_section_by_name (abfd, relplt_name);
9992 hdr = &elf_section_data (relplt)->this_hdr;
9993 if (hdr->sh_link != elf_dynsymtab (abfd)
9994 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
9997 plt = bfd_get_section_by_name (abfd, ".plt");
10001 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
10002 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
10005 count = relplt->size / hdr->sh_entsize;
10006 size = count * sizeof (asymbol);
10007 p = relplt->relocation;
10008 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
10010 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
10011 if (p->addend != 0)
10014 size += sizeof ("+0x") - 1 + 8 + 8 * (bed->s->elfclass == ELFCLASS64);
10016 size += sizeof ("+0x") - 1 + 8;
10021 s = *ret = (asymbol *) bfd_malloc (size);
10025 names = (char *) (s + count);
10026 p = relplt->relocation;
10028 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
10033 addr = bed->plt_sym_val (i, plt, p);
10034 if (addr == (bfd_vma) -1)
10037 *s = **p->sym_ptr_ptr;
10038 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
10039 we are defining a symbol, ensure one of them is set. */
10040 if ((s->flags & BSF_LOCAL) == 0)
10041 s->flags |= BSF_GLOBAL;
10042 s->flags |= BSF_SYNTHETIC;
10044 s->value = addr - plt->vma;
10047 len = strlen ((*p->sym_ptr_ptr)->name);
10048 memcpy (names, (*p->sym_ptr_ptr)->name, len);
10050 if (p->addend != 0)
10054 memcpy (names, "+0x", sizeof ("+0x") - 1);
10055 names += sizeof ("+0x") - 1;
10056 bfd_sprintf_vma (abfd, buf, p->addend);
10057 for (a = buf; *a == '0'; ++a)
10060 memcpy (names, a, len);
10063 memcpy (names, "@plt", sizeof ("@plt"));
10064 names += sizeof ("@plt");
10071 /* It is only used by x86-64 so far. */
10072 asection _bfd_elf_large_com_section
10073 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
10074 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
10077 _bfd_elf_post_process_headers (bfd * abfd,
10078 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
10080 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
10082 i_ehdrp = elf_elfheader (abfd);
10084 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
10086 /* To make things simpler for the loader on Linux systems we set the
10087 osabi field to ELFOSABI_GNU if the binary contains symbols of
10088 the STT_GNU_IFUNC type or STB_GNU_UNIQUE binding. */
10089 if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE
10090 && elf_tdata (abfd)->has_gnu_symbols)
10091 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_GNU;
10095 /* Return TRUE for ELF symbol types that represent functions.
10096 This is the default version of this function, which is sufficient for
10097 most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */
10100 _bfd_elf_is_function_type (unsigned int type)
10102 return (type == STT_FUNC
10103 || type == STT_GNU_IFUNC);
10106 /* If the ELF symbol SYM might be a function in SEC, return the
10107 function size and set *CODE_OFF to the function's entry point,
10108 otherwise return zero. */
10111 _bfd_elf_maybe_function_sym (const asymbol *sym, asection *sec,
10114 bfd_size_type size;
10116 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
10117 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0
10118 || sym->section != sec)
10121 *code_off = sym->value;
10123 if (!(sym->flags & BSF_SYNTHETIC))
10124 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;