1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
5 Free Software Foundation, Inc.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
29 BFD support for ELF formats is being worked on.
30 Currently, the best supported back ends are for sparc and i386
31 (running svr4 or Solaris 2).
33 Documentation of the internals of the support code still needs
34 to be written. The code is changing quickly enough that we
35 haven't bothered yet. */
37 /* For sparc64-cross-sparc32. */
45 #include "libiberty.h"
46 #include "safe-ctype.h"
48 static int elf_sort_sections (const void *, const void *);
49 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
50 static bfd_boolean prep_headers (bfd *);
51 static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
52 static bfd_boolean elf_read_notes (bfd *, file_ptr, bfd_size_type) ;
53 static bfd_boolean elf_parse_notes (bfd *abfd, char *buf, size_t size,
56 /* Swap version information in and out. The version information is
57 currently size independent. If that ever changes, this code will
58 need to move into elfcode.h. */
60 /* Swap in a Verdef structure. */
63 _bfd_elf_swap_verdef_in (bfd *abfd,
64 const Elf_External_Verdef *src,
65 Elf_Internal_Verdef *dst)
67 dst->vd_version = H_GET_16 (abfd, src->vd_version);
68 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
69 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
70 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
71 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
72 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
73 dst->vd_next = H_GET_32 (abfd, src->vd_next);
76 /* Swap out a Verdef structure. */
79 _bfd_elf_swap_verdef_out (bfd *abfd,
80 const Elf_Internal_Verdef *src,
81 Elf_External_Verdef *dst)
83 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
84 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
85 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
86 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
87 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
88 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
89 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
92 /* Swap in a Verdaux structure. */
95 _bfd_elf_swap_verdaux_in (bfd *abfd,
96 const Elf_External_Verdaux *src,
97 Elf_Internal_Verdaux *dst)
99 dst->vda_name = H_GET_32 (abfd, src->vda_name);
100 dst->vda_next = H_GET_32 (abfd, src->vda_next);
103 /* Swap out a Verdaux structure. */
106 _bfd_elf_swap_verdaux_out (bfd *abfd,
107 const Elf_Internal_Verdaux *src,
108 Elf_External_Verdaux *dst)
110 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
111 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
114 /* Swap in a Verneed structure. */
117 _bfd_elf_swap_verneed_in (bfd *abfd,
118 const Elf_External_Verneed *src,
119 Elf_Internal_Verneed *dst)
121 dst->vn_version = H_GET_16 (abfd, src->vn_version);
122 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
123 dst->vn_file = H_GET_32 (abfd, src->vn_file);
124 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
125 dst->vn_next = H_GET_32 (abfd, src->vn_next);
128 /* Swap out a Verneed structure. */
131 _bfd_elf_swap_verneed_out (bfd *abfd,
132 const Elf_Internal_Verneed *src,
133 Elf_External_Verneed *dst)
135 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
136 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
137 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
138 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
139 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
142 /* Swap in a Vernaux structure. */
145 _bfd_elf_swap_vernaux_in (bfd *abfd,
146 const Elf_External_Vernaux *src,
147 Elf_Internal_Vernaux *dst)
149 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
150 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
151 dst->vna_other = H_GET_16 (abfd, src->vna_other);
152 dst->vna_name = H_GET_32 (abfd, src->vna_name);
153 dst->vna_next = H_GET_32 (abfd, src->vna_next);
156 /* Swap out a Vernaux structure. */
159 _bfd_elf_swap_vernaux_out (bfd *abfd,
160 const Elf_Internal_Vernaux *src,
161 Elf_External_Vernaux *dst)
163 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
164 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
165 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
166 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
167 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
170 /* Swap in a Versym structure. */
173 _bfd_elf_swap_versym_in (bfd *abfd,
174 const Elf_External_Versym *src,
175 Elf_Internal_Versym *dst)
177 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
180 /* Swap out a Versym structure. */
183 _bfd_elf_swap_versym_out (bfd *abfd,
184 const Elf_Internal_Versym *src,
185 Elf_External_Versym *dst)
187 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
190 /* Standard ELF hash function. Do not change this function; you will
191 cause invalid hash tables to be generated. */
194 bfd_elf_hash (const char *namearg)
196 const unsigned char *name = (const unsigned char *) namearg;
201 while ((ch = *name++) != '\0')
204 if ((g = (h & 0xf0000000)) != 0)
207 /* The ELF ABI says `h &= ~g', but this is equivalent in
208 this case and on some machines one insn instead of two. */
212 return h & 0xffffffff;
215 /* DT_GNU_HASH hash function. Do not change this function; you will
216 cause invalid hash tables to be generated. */
219 bfd_elf_gnu_hash (const char *namearg)
221 const unsigned char *name = (const unsigned char *) namearg;
222 unsigned long h = 5381;
225 while ((ch = *name++) != '\0')
226 h = (h << 5) + h + ch;
227 return h & 0xffffffff;
230 /* Create a tdata field OBJECT_SIZE bytes in length, zeroed out and with
231 the object_id field of an elf_obj_tdata field set to OBJECT_ID. */
233 bfd_elf_allocate_object (bfd *abfd,
235 enum elf_object_id object_id)
237 BFD_ASSERT (object_size >= sizeof (struct elf_obj_tdata));
238 abfd->tdata.any = bfd_zalloc (abfd, object_size);
239 if (abfd->tdata.any == NULL)
242 elf_object_id (abfd) = object_id;
243 elf_program_header_size (abfd) = (bfd_size_type) -1;
249 bfd_elf_make_generic_object (bfd *abfd)
251 return bfd_elf_allocate_object (abfd, sizeof (struct elf_obj_tdata),
256 bfd_elf_mkcorefile (bfd *abfd)
258 /* I think this can be done just like an object file. */
259 return bfd_elf_make_generic_object (abfd);
263 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
265 Elf_Internal_Shdr **i_shdrp;
266 bfd_byte *shstrtab = NULL;
268 bfd_size_type shstrtabsize;
270 i_shdrp = elf_elfsections (abfd);
272 || shindex >= elf_numsections (abfd)
273 || i_shdrp[shindex] == 0)
276 shstrtab = i_shdrp[shindex]->contents;
277 if (shstrtab == NULL)
279 /* No cached one, attempt to read, and cache what we read. */
280 offset = i_shdrp[shindex]->sh_offset;
281 shstrtabsize = i_shdrp[shindex]->sh_size;
283 /* Allocate and clear an extra byte at the end, to prevent crashes
284 in case the string table is not terminated. */
285 if (shstrtabsize + 1 <= 1
286 || (shstrtab = bfd_alloc (abfd, shstrtabsize + 1)) == NULL
287 || bfd_seek (abfd, offset, SEEK_SET) != 0)
289 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
291 if (bfd_get_error () != bfd_error_system_call)
292 bfd_set_error (bfd_error_file_truncated);
294 /* Once we've failed to read it, make sure we don't keep
295 trying. Otherwise, we'll keep allocating space for
296 the string table over and over. */
297 i_shdrp[shindex]->sh_size = 0;
300 shstrtab[shstrtabsize] = '\0';
301 i_shdrp[shindex]->contents = shstrtab;
303 return (char *) shstrtab;
307 bfd_elf_string_from_elf_section (bfd *abfd,
308 unsigned int shindex,
309 unsigned int strindex)
311 Elf_Internal_Shdr *hdr;
316 if (elf_elfsections (abfd) == NULL || shindex >= elf_numsections (abfd))
319 hdr = elf_elfsections (abfd)[shindex];
321 if (hdr->contents == NULL
322 && bfd_elf_get_str_section (abfd, shindex) == NULL)
325 if (strindex >= hdr->sh_size)
327 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
328 (*_bfd_error_handler)
329 (_("%B: invalid string offset %u >= %lu for section `%s'"),
330 abfd, strindex, (unsigned long) hdr->sh_size,
331 (shindex == shstrndx && strindex == hdr->sh_name
333 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
337 return ((char *) hdr->contents) + strindex;
340 /* Read and convert symbols to internal format.
341 SYMCOUNT specifies the number of symbols to read, starting from
342 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
343 are non-NULL, they are used to store the internal symbols, external
344 symbols, and symbol section index extensions, respectively.
345 Returns a pointer to the internal symbol buffer (malloced if necessary)
346 or NULL if there were no symbols or some kind of problem. */
349 bfd_elf_get_elf_syms (bfd *ibfd,
350 Elf_Internal_Shdr *symtab_hdr,
353 Elf_Internal_Sym *intsym_buf,
355 Elf_External_Sym_Shndx *extshndx_buf)
357 Elf_Internal_Shdr *shndx_hdr;
359 const bfd_byte *esym;
360 Elf_External_Sym_Shndx *alloc_extshndx;
361 Elf_External_Sym_Shndx *shndx;
362 Elf_Internal_Sym *alloc_intsym;
363 Elf_Internal_Sym *isym;
364 Elf_Internal_Sym *isymend;
365 const struct elf_backend_data *bed;
370 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
376 /* Normal syms might have section extension entries. */
378 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
379 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
381 /* Read the symbols. */
383 alloc_extshndx = NULL;
385 bed = get_elf_backend_data (ibfd);
386 extsym_size = bed->s->sizeof_sym;
387 amt = symcount * extsym_size;
388 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
389 if (extsym_buf == NULL)
391 alloc_ext = bfd_malloc2 (symcount, extsym_size);
392 extsym_buf = alloc_ext;
394 if (extsym_buf == NULL
395 || bfd_seek (ibfd, pos, SEEK_SET) != 0
396 || bfd_bread (extsym_buf, amt, ibfd) != amt)
402 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
406 amt = symcount * sizeof (Elf_External_Sym_Shndx);
407 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
408 if (extshndx_buf == NULL)
410 alloc_extshndx = bfd_malloc2 (symcount,
411 sizeof (Elf_External_Sym_Shndx));
412 extshndx_buf = alloc_extshndx;
414 if (extshndx_buf == NULL
415 || bfd_seek (ibfd, pos, SEEK_SET) != 0
416 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
423 if (intsym_buf == NULL)
425 alloc_intsym = bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
426 intsym_buf = alloc_intsym;
427 if (intsym_buf == NULL)
431 /* Convert the symbols to internal form. */
432 isymend = intsym_buf + symcount;
433 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
435 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
436 if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym))
438 symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size;
439 (*_bfd_error_handler) (_("%B symbol number %lu references "
440 "nonexistent SHT_SYMTAB_SHNDX section"),
441 ibfd, (unsigned long) symoffset);
442 if (alloc_intsym != NULL)
449 if (alloc_ext != NULL)
451 if (alloc_extshndx != NULL)
452 free (alloc_extshndx);
457 /* Look up a symbol name. */
459 bfd_elf_sym_name (bfd *abfd,
460 Elf_Internal_Shdr *symtab_hdr,
461 Elf_Internal_Sym *isym,
465 unsigned int iname = isym->st_name;
466 unsigned int shindex = symtab_hdr->sh_link;
468 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
469 /* Check for a bogus st_shndx to avoid crashing. */
470 && isym->st_shndx < elf_numsections (abfd))
472 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
473 shindex = elf_elfheader (abfd)->e_shstrndx;
476 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
479 else if (sym_sec && *name == '\0')
480 name = bfd_section_name (abfd, sym_sec);
485 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
486 sections. The first element is the flags, the rest are section
489 typedef union elf_internal_group {
490 Elf_Internal_Shdr *shdr;
492 } Elf_Internal_Group;
494 /* Return the name of the group signature symbol. Why isn't the
495 signature just a string? */
498 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
500 Elf_Internal_Shdr *hdr;
501 unsigned char esym[sizeof (Elf64_External_Sym)];
502 Elf_External_Sym_Shndx eshndx;
503 Elf_Internal_Sym isym;
505 /* First we need to ensure the symbol table is available. Make sure
506 that it is a symbol table section. */
507 if (ghdr->sh_link >= elf_numsections (abfd))
509 hdr = elf_elfsections (abfd) [ghdr->sh_link];
510 if (hdr->sh_type != SHT_SYMTAB
511 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
514 /* Go read the symbol. */
515 hdr = &elf_tdata (abfd)->symtab_hdr;
516 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
517 &isym, esym, &eshndx) == NULL)
520 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
523 /* Set next_in_group list pointer, and group name for NEWSECT. */
526 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
528 unsigned int num_group = elf_tdata (abfd)->num_group;
530 /* If num_group is zero, read in all SHT_GROUP sections. The count
531 is set to -1 if there are no SHT_GROUP sections. */
534 unsigned int i, shnum;
536 /* First count the number of groups. If we have a SHT_GROUP
537 section with just a flag word (ie. sh_size is 4), ignore it. */
538 shnum = elf_numsections (abfd);
541 #define IS_VALID_GROUP_SECTION_HEADER(shdr) \
542 ( (shdr)->sh_type == SHT_GROUP \
543 && (shdr)->sh_size >= (2 * GRP_ENTRY_SIZE) \
544 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
545 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
547 for (i = 0; i < shnum; i++)
549 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
551 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
557 num_group = (unsigned) -1;
558 elf_tdata (abfd)->num_group = num_group;
562 /* We keep a list of elf section headers for group sections,
563 so we can find them quickly. */
566 elf_tdata (abfd)->num_group = num_group;
567 elf_tdata (abfd)->group_sect_ptr
568 = bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
569 if (elf_tdata (abfd)->group_sect_ptr == NULL)
573 for (i = 0; i < shnum; i++)
575 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
577 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
580 Elf_Internal_Group *dest;
582 /* Add to list of sections. */
583 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
586 /* Read the raw contents. */
587 BFD_ASSERT (sizeof (*dest) >= 4);
588 amt = shdr->sh_size * sizeof (*dest) / 4;
589 shdr->contents = bfd_alloc2 (abfd, shdr->sh_size,
591 /* PR binutils/4110: Handle corrupt group headers. */
592 if (shdr->contents == NULL)
595 (_("%B: Corrupt size field in group section header: 0x%lx"), abfd, shdr->sh_size);
596 bfd_set_error (bfd_error_bad_value);
600 memset (shdr->contents, 0, amt);
602 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
603 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
607 /* Translate raw contents, a flag word followed by an
608 array of elf section indices all in target byte order,
609 to the flag word followed by an array of elf section
611 src = shdr->contents + shdr->sh_size;
612 dest = (Elf_Internal_Group *) (shdr->contents + amt);
619 idx = H_GET_32 (abfd, src);
620 if (src == shdr->contents)
623 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
624 shdr->bfd_section->flags
625 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
630 ((*_bfd_error_handler)
631 (_("%B: invalid SHT_GROUP entry"), abfd));
634 dest->shdr = elf_elfsections (abfd)[idx];
641 if (num_group != (unsigned) -1)
645 for (i = 0; i < num_group; i++)
647 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
648 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
649 unsigned int n_elt = shdr->sh_size / 4;
651 /* Look through this group's sections to see if current
652 section is a member. */
654 if ((++idx)->shdr == hdr)
658 /* We are a member of this group. Go looking through
659 other members to see if any others are linked via
661 idx = (Elf_Internal_Group *) shdr->contents;
662 n_elt = shdr->sh_size / 4;
664 if ((s = (++idx)->shdr->bfd_section) != NULL
665 && elf_next_in_group (s) != NULL)
669 /* Snarf the group name from other member, and
670 insert current section in circular list. */
671 elf_group_name (newsect) = elf_group_name (s);
672 elf_next_in_group (newsect) = elf_next_in_group (s);
673 elf_next_in_group (s) = newsect;
679 gname = group_signature (abfd, shdr);
682 elf_group_name (newsect) = gname;
684 /* Start a circular list with one element. */
685 elf_next_in_group (newsect) = newsect;
688 /* If the group section has been created, point to the
690 if (shdr->bfd_section != NULL)
691 elf_next_in_group (shdr->bfd_section) = newsect;
699 if (elf_group_name (newsect) == NULL)
701 (*_bfd_error_handler) (_("%B: no group info for section %A"),
708 _bfd_elf_setup_sections (bfd *abfd)
711 unsigned int num_group = elf_tdata (abfd)->num_group;
712 bfd_boolean result = TRUE;
715 /* Process SHF_LINK_ORDER. */
716 for (s = abfd->sections; s != NULL; s = s->next)
718 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
719 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
721 unsigned int elfsec = this_hdr->sh_link;
722 /* FIXME: The old Intel compiler and old strip/objcopy may
723 not set the sh_link or sh_info fields. Hence we could
724 get the situation where elfsec is 0. */
727 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
728 if (bed->link_order_error_handler)
729 bed->link_order_error_handler
730 (_("%B: warning: sh_link not set for section `%A'"),
735 asection *link = NULL;
737 if (elfsec < elf_numsections (abfd))
739 this_hdr = elf_elfsections (abfd)[elfsec];
740 link = this_hdr->bfd_section;
744 Some strip/objcopy may leave an incorrect value in
745 sh_link. We don't want to proceed. */
748 (*_bfd_error_handler)
749 (_("%B: sh_link [%d] in section `%A' is incorrect"),
750 s->owner, s, elfsec);
754 elf_linked_to_section (s) = link;
759 /* Process section groups. */
760 if (num_group == (unsigned) -1)
763 for (i = 0; i < num_group; i++)
765 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
766 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
767 unsigned int n_elt = shdr->sh_size / 4;
770 if ((++idx)->shdr->bfd_section)
771 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
772 else if (idx->shdr->sh_type == SHT_RELA
773 || idx->shdr->sh_type == SHT_REL)
774 /* We won't include relocation sections in section groups in
775 output object files. We adjust the group section size here
776 so that relocatable link will work correctly when
777 relocation sections are in section group in input object
779 shdr->bfd_section->size -= 4;
782 /* There are some unknown sections in the group. */
783 (*_bfd_error_handler)
784 (_("%B: unknown [%d] section `%s' in group [%s]"),
786 (unsigned int) idx->shdr->sh_type,
787 bfd_elf_string_from_elf_section (abfd,
788 (elf_elfheader (abfd)
791 shdr->bfd_section->name);
799 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
801 return elf_next_in_group (sec) != NULL;
804 /* Make a BFD section from an ELF section. We store a pointer to the
805 BFD section in the bfd_section field of the header. */
808 _bfd_elf_make_section_from_shdr (bfd *abfd,
809 Elf_Internal_Shdr *hdr,
815 const struct elf_backend_data *bed;
817 if (hdr->bfd_section != NULL)
819 BFD_ASSERT (strcmp (name,
820 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
824 newsect = bfd_make_section_anyway (abfd, name);
828 hdr->bfd_section = newsect;
829 elf_section_data (newsect)->this_hdr = *hdr;
830 elf_section_data (newsect)->this_idx = shindex;
832 /* Always use the real type/flags. */
833 elf_section_type (newsect) = hdr->sh_type;
834 elf_section_flags (newsect) = hdr->sh_flags;
836 newsect->filepos = hdr->sh_offset;
838 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
839 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
840 || ! bfd_set_section_alignment (abfd, newsect,
841 bfd_log2 (hdr->sh_addralign)))
844 flags = SEC_NO_FLAGS;
845 if (hdr->sh_type != SHT_NOBITS)
846 flags |= SEC_HAS_CONTENTS;
847 if (hdr->sh_type == SHT_GROUP)
848 flags |= SEC_GROUP | SEC_EXCLUDE;
849 if ((hdr->sh_flags & SHF_ALLOC) != 0)
852 if (hdr->sh_type != SHT_NOBITS)
855 if ((hdr->sh_flags & SHF_WRITE) == 0)
856 flags |= SEC_READONLY;
857 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
859 else if ((flags & SEC_LOAD) != 0)
861 if ((hdr->sh_flags & SHF_MERGE) != 0)
864 newsect->entsize = hdr->sh_entsize;
865 if ((hdr->sh_flags & SHF_STRINGS) != 0)
866 flags |= SEC_STRINGS;
868 if (hdr->sh_flags & SHF_GROUP)
869 if (!setup_group (abfd, hdr, newsect))
871 if ((hdr->sh_flags & SHF_TLS) != 0)
872 flags |= SEC_THREAD_LOCAL;
874 if ((flags & SEC_ALLOC) == 0)
876 /* The debugging sections appear to be recognized only by name,
877 not any sort of flag. Their SEC_ALLOC bits are cleared. */
882 } debug_sections [] =
884 { STRING_COMMA_LEN ("debug") }, /* 'd' */
885 { NULL, 0 }, /* 'e' */
886 { NULL, 0 }, /* 'f' */
887 { STRING_COMMA_LEN ("gnu.linkonce.wi.") }, /* 'g' */
888 { NULL, 0 }, /* 'h' */
889 { NULL, 0 }, /* 'i' */
890 { NULL, 0 }, /* 'j' */
891 { NULL, 0 }, /* 'k' */
892 { STRING_COMMA_LEN ("line") }, /* 'l' */
893 { NULL, 0 }, /* 'm' */
894 { NULL, 0 }, /* 'n' */
895 { NULL, 0 }, /* 'o' */
896 { NULL, 0 }, /* 'p' */
897 { NULL, 0 }, /* 'q' */
898 { NULL, 0 }, /* 'r' */
899 { STRING_COMMA_LEN ("stab") }, /* 's' */
900 { NULL, 0 }, /* 't' */
901 { NULL, 0 }, /* 'u' */
902 { NULL, 0 }, /* 'v' */
903 { NULL, 0 }, /* 'w' */
904 { NULL, 0 }, /* 'x' */
905 { NULL, 0 }, /* 'y' */
906 { STRING_COMMA_LEN ("zdebug") } /* 'z' */
911 int i = name [1] - 'd';
913 && i < (int) ARRAY_SIZE (debug_sections)
914 && debug_sections [i].name != NULL
915 && strncmp (&name [1], debug_sections [i].name,
916 debug_sections [i].len) == 0)
917 flags |= SEC_DEBUGGING;
921 /* As a GNU extension, if the name begins with .gnu.linkonce, we
922 only link a single copy of the section. This is used to support
923 g++. g++ will emit each template expansion in its own section.
924 The symbols will be defined as weak, so that multiple definitions
925 are permitted. The GNU linker extension is to actually discard
926 all but one of the sections. */
927 if (CONST_STRNEQ (name, ".gnu.linkonce")
928 && elf_next_in_group (newsect) == NULL)
929 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
931 bed = get_elf_backend_data (abfd);
932 if (bed->elf_backend_section_flags)
933 if (! bed->elf_backend_section_flags (&flags, hdr))
936 if (! bfd_set_section_flags (abfd, newsect, flags))
939 /* We do not parse the PT_NOTE segments as we are interested even in the
940 separate debug info files which may have the segments offsets corrupted.
941 PT_NOTEs from the core files are currently not parsed using BFD. */
942 if (hdr->sh_type == SHT_NOTE)
946 if (!bfd_malloc_and_get_section (abfd, newsect, &contents))
949 elf_parse_notes (abfd, (char *) contents, hdr->sh_size, -1);
953 if ((flags & SEC_ALLOC) != 0)
955 Elf_Internal_Phdr *phdr;
956 unsigned int i, nload;
958 /* Some ELF linkers produce binaries with all the program header
959 p_paddr fields zero. If we have such a binary with more than
960 one PT_LOAD header, then leave the section lma equal to vma
961 so that we don't create sections with overlapping lma. */
962 phdr = elf_tdata (abfd)->phdr;
963 for (nload = 0, i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
964 if (phdr->p_paddr != 0)
966 else if (phdr->p_type == PT_LOAD && phdr->p_memsz != 0)
968 if (i >= elf_elfheader (abfd)->e_phnum && nload > 1)
971 phdr = elf_tdata (abfd)->phdr;
972 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
974 if (phdr->p_type == PT_LOAD
975 && ELF_IS_SECTION_IN_SEGMENT (hdr, phdr))
977 if ((flags & SEC_LOAD) == 0)
978 newsect->lma = (phdr->p_paddr
979 + hdr->sh_addr - phdr->p_vaddr);
981 /* We used to use the same adjustment for SEC_LOAD
982 sections, but that doesn't work if the segment
983 is packed with code from multiple VMAs.
984 Instead we calculate the section LMA based on
985 the segment LMA. It is assumed that the
986 segment will contain sections with contiguous
987 LMAs, even if the VMAs are not. */
988 newsect->lma = (phdr->p_paddr
989 + hdr->sh_offset - phdr->p_offset);
991 /* With contiguous segments, we can't tell from file
992 offsets whether a section with zero size should
993 be placed at the end of one segment or the
994 beginning of the next. Decide based on vaddr. */
995 if (hdr->sh_addr >= phdr->p_vaddr
996 && (hdr->sh_addr + hdr->sh_size
997 <= phdr->p_vaddr + phdr->p_memsz))
1006 const char *const bfd_elf_section_type_names[] = {
1007 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1008 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1009 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1012 /* ELF relocs are against symbols. If we are producing relocatable
1013 output, and the reloc is against an external symbol, and nothing
1014 has given us any additional addend, the resulting reloc will also
1015 be against the same symbol. In such a case, we don't want to
1016 change anything about the way the reloc is handled, since it will
1017 all be done at final link time. Rather than put special case code
1018 into bfd_perform_relocation, all the reloc types use this howto
1019 function. It just short circuits the reloc if producing
1020 relocatable output against an external symbol. */
1022 bfd_reloc_status_type
1023 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1024 arelent *reloc_entry,
1026 void *data ATTRIBUTE_UNUSED,
1027 asection *input_section,
1029 char **error_message ATTRIBUTE_UNUSED)
1031 if (output_bfd != NULL
1032 && (symbol->flags & BSF_SECTION_SYM) == 0
1033 && (! reloc_entry->howto->partial_inplace
1034 || reloc_entry->addend == 0))
1036 reloc_entry->address += input_section->output_offset;
1037 return bfd_reloc_ok;
1040 return bfd_reloc_continue;
1043 /* Copy the program header and other data from one object module to
1047 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1049 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1050 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1053 BFD_ASSERT (!elf_flags_init (obfd)
1054 || (elf_elfheader (obfd)->e_flags
1055 == elf_elfheader (ibfd)->e_flags));
1057 elf_gp (obfd) = elf_gp (ibfd);
1058 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1059 elf_flags_init (obfd) = TRUE;
1061 /* Copy object attributes. */
1062 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1068 get_segment_type (unsigned int p_type)
1073 case PT_NULL: pt = "NULL"; break;
1074 case PT_LOAD: pt = "LOAD"; break;
1075 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1076 case PT_INTERP: pt = "INTERP"; break;
1077 case PT_NOTE: pt = "NOTE"; break;
1078 case PT_SHLIB: pt = "SHLIB"; break;
1079 case PT_PHDR: pt = "PHDR"; break;
1080 case PT_TLS: pt = "TLS"; break;
1081 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1082 case PT_GNU_STACK: pt = "STACK"; break;
1083 case PT_GNU_RELRO: pt = "RELRO"; break;
1084 default: pt = NULL; break;
1089 /* Print out the program headers. */
1092 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1095 Elf_Internal_Phdr *p;
1097 bfd_byte *dynbuf = NULL;
1099 p = elf_tdata (abfd)->phdr;
1104 fprintf (f, _("\nProgram Header:\n"));
1105 c = elf_elfheader (abfd)->e_phnum;
1106 for (i = 0; i < c; i++, p++)
1108 const char *pt = get_segment_type (p->p_type);
1113 sprintf (buf, "0x%lx", p->p_type);
1116 fprintf (f, "%8s off 0x", pt);
1117 bfd_fprintf_vma (abfd, f, p->p_offset);
1118 fprintf (f, " vaddr 0x");
1119 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1120 fprintf (f, " paddr 0x");
1121 bfd_fprintf_vma (abfd, f, p->p_paddr);
1122 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1123 fprintf (f, " filesz 0x");
1124 bfd_fprintf_vma (abfd, f, p->p_filesz);
1125 fprintf (f, " memsz 0x");
1126 bfd_fprintf_vma (abfd, f, p->p_memsz);
1127 fprintf (f, " flags %c%c%c",
1128 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1129 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1130 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1131 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1132 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1137 s = bfd_get_section_by_name (abfd, ".dynamic");
1140 unsigned int elfsec;
1141 unsigned long shlink;
1142 bfd_byte *extdyn, *extdynend;
1144 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1146 fprintf (f, _("\nDynamic Section:\n"));
1148 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1151 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1152 if (elfsec == SHN_BAD)
1154 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1156 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1157 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1160 extdynend = extdyn + s->size;
1161 for (; extdyn < extdynend; extdyn += extdynsize)
1163 Elf_Internal_Dyn dyn;
1164 const char *name = "";
1166 bfd_boolean stringp;
1167 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1169 (*swap_dyn_in) (abfd, extdyn, &dyn);
1171 if (dyn.d_tag == DT_NULL)
1178 if (bed->elf_backend_get_target_dtag)
1179 name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag);
1181 if (!strcmp (name, ""))
1183 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1188 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1189 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1190 case DT_PLTGOT: name = "PLTGOT"; break;
1191 case DT_HASH: name = "HASH"; break;
1192 case DT_STRTAB: name = "STRTAB"; break;
1193 case DT_SYMTAB: name = "SYMTAB"; break;
1194 case DT_RELA: name = "RELA"; break;
1195 case DT_RELASZ: name = "RELASZ"; break;
1196 case DT_RELAENT: name = "RELAENT"; break;
1197 case DT_STRSZ: name = "STRSZ"; break;
1198 case DT_SYMENT: name = "SYMENT"; break;
1199 case DT_INIT: name = "INIT"; break;
1200 case DT_FINI: name = "FINI"; break;
1201 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1202 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1203 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1204 case DT_REL: name = "REL"; break;
1205 case DT_RELSZ: name = "RELSZ"; break;
1206 case DT_RELENT: name = "RELENT"; break;
1207 case DT_PLTREL: name = "PLTREL"; break;
1208 case DT_DEBUG: name = "DEBUG"; break;
1209 case DT_TEXTREL: name = "TEXTREL"; break;
1210 case DT_JMPREL: name = "JMPREL"; break;
1211 case DT_BIND_NOW: name = "BIND_NOW"; break;
1212 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1213 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1214 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1215 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1216 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1217 case DT_FLAGS: name = "FLAGS"; break;
1218 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1219 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1220 case DT_CHECKSUM: name = "CHECKSUM"; break;
1221 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1222 case DT_MOVEENT: name = "MOVEENT"; break;
1223 case DT_MOVESZ: name = "MOVESZ"; break;
1224 case DT_FEATURE: name = "FEATURE"; break;
1225 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1226 case DT_SYMINSZ: name = "SYMINSZ"; break;
1227 case DT_SYMINENT: name = "SYMINENT"; break;
1228 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1229 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1230 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1231 case DT_PLTPAD: name = "PLTPAD"; break;
1232 case DT_MOVETAB: name = "MOVETAB"; break;
1233 case DT_SYMINFO: name = "SYMINFO"; break;
1234 case DT_RELACOUNT: name = "RELACOUNT"; break;
1235 case DT_RELCOUNT: name = "RELCOUNT"; break;
1236 case DT_FLAGS_1: name = "FLAGS_1"; break;
1237 case DT_VERSYM: name = "VERSYM"; break;
1238 case DT_VERDEF: name = "VERDEF"; break;
1239 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1240 case DT_VERNEED: name = "VERNEED"; break;
1241 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1242 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1243 case DT_USED: name = "USED"; break;
1244 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1245 case DT_GNU_HASH: name = "GNU_HASH"; break;
1248 fprintf (f, " %-20s ", name);
1252 bfd_fprintf_vma (abfd, f, dyn.d_un.d_val);
1257 unsigned int tagv = dyn.d_un.d_val;
1259 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1262 fprintf (f, "%s", string);
1271 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1272 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1274 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1278 if (elf_dynverdef (abfd) != 0)
1280 Elf_Internal_Verdef *t;
1282 fprintf (f, _("\nVersion definitions:\n"));
1283 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1285 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1286 t->vd_flags, t->vd_hash,
1287 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1288 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1290 Elf_Internal_Verdaux *a;
1293 for (a = t->vd_auxptr->vda_nextptr;
1297 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1303 if (elf_dynverref (abfd) != 0)
1305 Elf_Internal_Verneed *t;
1307 fprintf (f, _("\nVersion References:\n"));
1308 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1310 Elf_Internal_Vernaux *a;
1312 fprintf (f, _(" required from %s:\n"),
1313 t->vn_filename ? t->vn_filename : "<corrupt>");
1314 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1315 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1316 a->vna_flags, a->vna_other,
1317 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1329 /* Display ELF-specific fields of a symbol. */
1332 bfd_elf_print_symbol (bfd *abfd,
1335 bfd_print_symbol_type how)
1340 case bfd_print_symbol_name:
1341 fprintf (file, "%s", symbol->name);
1343 case bfd_print_symbol_more:
1344 fprintf (file, "elf ");
1345 bfd_fprintf_vma (abfd, file, symbol->value);
1346 fprintf (file, " %lx", (unsigned long) symbol->flags);
1348 case bfd_print_symbol_all:
1350 const char *section_name;
1351 const char *name = NULL;
1352 const struct elf_backend_data *bed;
1353 unsigned char st_other;
1356 section_name = symbol->section ? symbol->section->name : "(*none*)";
1358 bed = get_elf_backend_data (abfd);
1359 if (bed->elf_backend_print_symbol_all)
1360 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1364 name = symbol->name;
1365 bfd_print_symbol_vandf (abfd, file, symbol);
1368 fprintf (file, " %s\t", section_name);
1369 /* Print the "other" value for a symbol. For common symbols,
1370 we've already printed the size; now print the alignment.
1371 For other symbols, we have no specified alignment, and
1372 we've printed the address; now print the size. */
1373 if (symbol->section && bfd_is_com_section (symbol->section))
1374 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1376 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1377 bfd_fprintf_vma (abfd, file, val);
1379 /* If we have version information, print it. */
1380 if (elf_tdata (abfd)->dynversym_section != 0
1381 && (elf_tdata (abfd)->dynverdef_section != 0
1382 || elf_tdata (abfd)->dynverref_section != 0))
1384 unsigned int vernum;
1385 const char *version_string;
1387 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1390 version_string = "";
1391 else if (vernum == 1)
1392 version_string = "Base";
1393 else if (vernum <= elf_tdata (abfd)->cverdefs)
1395 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1398 Elf_Internal_Verneed *t;
1400 version_string = "";
1401 for (t = elf_tdata (abfd)->verref;
1405 Elf_Internal_Vernaux *a;
1407 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1409 if (a->vna_other == vernum)
1411 version_string = a->vna_nodename;
1418 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1419 fprintf (file, " %-11s", version_string);
1424 fprintf (file, " (%s)", version_string);
1425 for (i = 10 - strlen (version_string); i > 0; --i)
1430 /* If the st_other field is not zero, print it. */
1431 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1436 case STV_INTERNAL: fprintf (file, " .internal"); break;
1437 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1438 case STV_PROTECTED: fprintf (file, " .protected"); break;
1440 /* Some other non-defined flags are also present, so print
1442 fprintf (file, " 0x%02x", (unsigned int) st_other);
1445 fprintf (file, " %s", name);
1451 /* Allocate an ELF string table--force the first byte to be zero. */
1453 struct bfd_strtab_hash *
1454 _bfd_elf_stringtab_init (void)
1456 struct bfd_strtab_hash *ret;
1458 ret = _bfd_stringtab_init ();
1463 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1464 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1465 if (loc == (bfd_size_type) -1)
1467 _bfd_stringtab_free (ret);
1474 /* ELF .o/exec file reading */
1476 /* Create a new bfd section from an ELF section header. */
1479 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1481 Elf_Internal_Shdr *hdr;
1482 Elf_Internal_Ehdr *ehdr;
1483 const struct elf_backend_data *bed;
1486 if (shindex >= elf_numsections (abfd))
1489 hdr = elf_elfsections (abfd)[shindex];
1490 ehdr = elf_elfheader (abfd);
1491 name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx,
1496 bed = get_elf_backend_data (abfd);
1497 switch (hdr->sh_type)
1500 /* Inactive section. Throw it away. */
1503 case SHT_PROGBITS: /* Normal section with contents. */
1504 case SHT_NOBITS: /* .bss section. */
1505 case SHT_HASH: /* .hash section. */
1506 case SHT_NOTE: /* .note section. */
1507 case SHT_INIT_ARRAY: /* .init_array section. */
1508 case SHT_FINI_ARRAY: /* .fini_array section. */
1509 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1510 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1511 case SHT_GNU_HASH: /* .gnu.hash section. */
1512 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1514 case SHT_DYNAMIC: /* Dynamic linking information. */
1515 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1517 if (hdr->sh_link > elf_numsections (abfd))
1519 /* PR 10478: Accept sparc binaries with a sh_link
1520 field set to SHN_BEFORE or SHN_AFTER. */
1521 switch (bfd_get_arch (abfd))
1523 case bfd_arch_sparc:
1524 if (hdr->sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
1525 || hdr->sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
1527 /* Otherwise fall through. */
1532 else if (elf_elfsections (abfd)[hdr->sh_link] == NULL)
1534 else if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1536 Elf_Internal_Shdr *dynsymhdr;
1538 /* The shared libraries distributed with hpux11 have a bogus
1539 sh_link field for the ".dynamic" section. Find the
1540 string table for the ".dynsym" section instead. */
1541 if (elf_dynsymtab (abfd) != 0)
1543 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1544 hdr->sh_link = dynsymhdr->sh_link;
1548 unsigned int i, num_sec;
1550 num_sec = elf_numsections (abfd);
1551 for (i = 1; i < num_sec; i++)
1553 dynsymhdr = elf_elfsections (abfd)[i];
1554 if (dynsymhdr->sh_type == SHT_DYNSYM)
1556 hdr->sh_link = dynsymhdr->sh_link;
1564 case SHT_SYMTAB: /* A symbol table */
1565 if (elf_onesymtab (abfd) == shindex)
1568 if (hdr->sh_entsize != bed->s->sizeof_sym)
1570 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
1572 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1573 elf_onesymtab (abfd) = shindex;
1574 elf_tdata (abfd)->symtab_hdr = *hdr;
1575 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1576 abfd->flags |= HAS_SYMS;
1578 /* Sometimes a shared object will map in the symbol table. If
1579 SHF_ALLOC is set, and this is a shared object, then we also
1580 treat this section as a BFD section. We can not base the
1581 decision purely on SHF_ALLOC, because that flag is sometimes
1582 set in a relocatable object file, which would confuse the
1584 if ((hdr->sh_flags & SHF_ALLOC) != 0
1585 && (abfd->flags & DYNAMIC) != 0
1586 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1590 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1591 can't read symbols without that section loaded as well. It
1592 is most likely specified by the next section header. */
1593 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1595 unsigned int i, num_sec;
1597 num_sec = elf_numsections (abfd);
1598 for (i = shindex + 1; i < num_sec; i++)
1600 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1601 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1602 && hdr2->sh_link == shindex)
1606 for (i = 1; i < shindex; i++)
1608 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1609 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1610 && hdr2->sh_link == shindex)
1614 return bfd_section_from_shdr (abfd, i);
1618 case SHT_DYNSYM: /* A dynamic symbol table */
1619 if (elf_dynsymtab (abfd) == shindex)
1622 if (hdr->sh_entsize != bed->s->sizeof_sym)
1624 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1625 elf_dynsymtab (abfd) = shindex;
1626 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1627 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1628 abfd->flags |= HAS_SYMS;
1630 /* Besides being a symbol table, we also treat this as a regular
1631 section, so that objcopy can handle it. */
1632 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1634 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1635 if (elf_symtab_shndx (abfd) == shindex)
1638 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1639 elf_symtab_shndx (abfd) = shindex;
1640 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1641 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1644 case SHT_STRTAB: /* A string table */
1645 if (hdr->bfd_section != NULL)
1647 if (ehdr->e_shstrndx == shindex)
1649 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1650 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1653 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1656 elf_tdata (abfd)->strtab_hdr = *hdr;
1657 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1660 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1663 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1664 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1665 elf_elfsections (abfd)[shindex] = hdr;
1666 /* We also treat this as a regular section, so that objcopy
1668 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1672 /* If the string table isn't one of the above, then treat it as a
1673 regular section. We need to scan all the headers to be sure,
1674 just in case this strtab section appeared before the above. */
1675 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1677 unsigned int i, num_sec;
1679 num_sec = elf_numsections (abfd);
1680 for (i = 1; i < num_sec; i++)
1682 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1683 if (hdr2->sh_link == shindex)
1685 /* Prevent endless recursion on broken objects. */
1688 if (! bfd_section_from_shdr (abfd, i))
1690 if (elf_onesymtab (abfd) == i)
1692 if (elf_dynsymtab (abfd) == i)
1693 goto dynsymtab_strtab;
1697 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1701 /* *These* do a lot of work -- but build no sections! */
1703 asection *target_sect;
1704 Elf_Internal_Shdr *hdr2;
1705 unsigned int num_sec = elf_numsections (abfd);
1708 != (bfd_size_type) (hdr->sh_type == SHT_REL
1709 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
1712 /* Check for a bogus link to avoid crashing. */
1713 if (hdr->sh_link >= num_sec)
1715 ((*_bfd_error_handler)
1716 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1717 abfd, hdr->sh_link, name, shindex));
1718 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1722 /* For some incomprehensible reason Oracle distributes
1723 libraries for Solaris in which some of the objects have
1724 bogus sh_link fields. It would be nice if we could just
1725 reject them, but, unfortunately, some people need to use
1726 them. We scan through the section headers; if we find only
1727 one suitable symbol table, we clobber the sh_link to point
1728 to it. I hope this doesn't break anything.
1730 Don't do it on executable nor shared library. */
1731 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0
1732 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1733 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1739 for (scan = 1; scan < num_sec; scan++)
1741 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1742 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1753 hdr->sh_link = found;
1756 /* Get the symbol table. */
1757 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1758 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
1759 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1762 /* If this reloc section does not use the main symbol table we
1763 don't treat it as a reloc section. BFD can't adequately
1764 represent such a section, so at least for now, we don't
1765 try. We just present it as a normal section. We also
1766 can't use it as a reloc section if it points to the null
1767 section, an invalid section, another reloc section, or its
1768 sh_link points to the null section. */
1769 if (hdr->sh_link != elf_onesymtab (abfd)
1770 || hdr->sh_link == SHN_UNDEF
1771 || hdr->sh_info == SHN_UNDEF
1772 || hdr->sh_info >= num_sec
1773 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
1774 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
1775 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1778 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1780 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1781 if (target_sect == NULL)
1784 if ((target_sect->flags & SEC_RELOC) == 0
1785 || target_sect->reloc_count == 0)
1786 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1790 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1791 amt = sizeof (*hdr2);
1792 hdr2 = bfd_alloc (abfd, amt);
1795 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1798 elf_elfsections (abfd)[shindex] = hdr2;
1799 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1800 target_sect->flags |= SEC_RELOC;
1801 target_sect->relocation = NULL;
1802 target_sect->rel_filepos = hdr->sh_offset;
1803 /* In the section to which the relocations apply, mark whether
1804 its relocations are of the REL or RELA variety. */
1805 if (hdr->sh_size != 0)
1806 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
1807 abfd->flags |= HAS_RELOC;
1811 case SHT_GNU_verdef:
1812 elf_dynverdef (abfd) = shindex;
1813 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1814 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1816 case SHT_GNU_versym:
1817 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
1819 elf_dynversym (abfd) = shindex;
1820 elf_tdata (abfd)->dynversym_hdr = *hdr;
1821 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1823 case SHT_GNU_verneed:
1824 elf_dynverref (abfd) = shindex;
1825 elf_tdata (abfd)->dynverref_hdr = *hdr;
1826 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1832 if (! IS_VALID_GROUP_SECTION_HEADER (hdr))
1834 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1836 if (hdr->contents != NULL)
1838 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1839 unsigned int n_elt = hdr->sh_size / GRP_ENTRY_SIZE;
1842 if (idx->flags & GRP_COMDAT)
1843 hdr->bfd_section->flags
1844 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1846 /* We try to keep the same section order as it comes in. */
1848 while (--n_elt != 0)
1852 if (idx->shdr != NULL
1853 && (s = idx->shdr->bfd_section) != NULL
1854 && elf_next_in_group (s) != NULL)
1856 elf_next_in_group (hdr->bfd_section) = s;
1864 /* Possibly an attributes section. */
1865 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
1866 || hdr->sh_type == bed->obj_attrs_section_type)
1868 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1870 _bfd_elf_parse_attributes (abfd, hdr);
1874 /* Check for any processor-specific section types. */
1875 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
1878 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
1880 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1881 /* FIXME: How to properly handle allocated section reserved
1882 for applications? */
1883 (*_bfd_error_handler)
1884 (_("%B: don't know how to handle allocated, application "
1885 "specific section `%s' [0x%8x]"),
1886 abfd, name, hdr->sh_type);
1888 /* Allow sections reserved for applications. */
1889 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1892 else if (hdr->sh_type >= SHT_LOPROC
1893 && hdr->sh_type <= SHT_HIPROC)
1894 /* FIXME: We should handle this section. */
1895 (*_bfd_error_handler)
1896 (_("%B: don't know how to handle processor specific section "
1898 abfd, name, hdr->sh_type);
1899 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
1901 /* Unrecognised OS-specific sections. */
1902 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
1903 /* SHF_OS_NONCONFORMING indicates that special knowledge is
1904 required to correctly process the section and the file should
1905 be rejected with an error message. */
1906 (*_bfd_error_handler)
1907 (_("%B: don't know how to handle OS specific section "
1909 abfd, name, hdr->sh_type);
1911 /* Otherwise it should be processed. */
1912 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1915 /* FIXME: We should handle this section. */
1916 (*_bfd_error_handler)
1917 (_("%B: don't know how to handle section `%s' [0x%8x]"),
1918 abfd, name, hdr->sh_type);
1926 /* Return the local symbol specified by ABFD, R_SYMNDX. */
1929 bfd_sym_from_r_symndx (struct sym_cache *cache,
1931 unsigned long r_symndx)
1933 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
1935 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
1937 Elf_Internal_Shdr *symtab_hdr;
1938 unsigned char esym[sizeof (Elf64_External_Sym)];
1939 Elf_External_Sym_Shndx eshndx;
1941 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1942 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
1943 &cache->sym[ent], esym, &eshndx) == NULL)
1946 if (cache->abfd != abfd)
1948 memset (cache->indx, -1, sizeof (cache->indx));
1951 cache->indx[ent] = r_symndx;
1954 return &cache->sym[ent];
1957 /* Given an ELF section number, retrieve the corresponding BFD
1961 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
1963 if (index >= elf_numsections (abfd))
1965 return elf_elfsections (abfd)[index]->bfd_section;
1968 static const struct bfd_elf_special_section special_sections_b[] =
1970 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1971 { NULL, 0, 0, 0, 0 }
1974 static const struct bfd_elf_special_section special_sections_c[] =
1976 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
1977 { NULL, 0, 0, 0, 0 }
1980 static const struct bfd_elf_special_section special_sections_d[] =
1982 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1983 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1984 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
1985 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
1986 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
1987 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
1988 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
1989 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
1990 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
1991 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
1992 { NULL, 0, 0, 0, 0 }
1995 static const struct bfd_elf_special_section special_sections_f[] =
1997 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
1998 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
1999 { NULL, 0, 0, 0, 0 }
2002 static const struct bfd_elf_special_section special_sections_g[] =
2004 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2005 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2006 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2007 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2008 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2009 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2010 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2011 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2012 { NULL, 0, 0, 0, 0 }
2015 static const struct bfd_elf_special_section special_sections_h[] =
2017 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2018 { NULL, 0, 0, 0, 0 }
2021 static const struct bfd_elf_special_section special_sections_i[] =
2023 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2024 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2025 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2026 { NULL, 0, 0, 0, 0 }
2029 static const struct bfd_elf_special_section special_sections_l[] =
2031 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2032 { NULL, 0, 0, 0, 0 }
2035 static const struct bfd_elf_special_section special_sections_n[] =
2037 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2038 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2039 { NULL, 0, 0, 0, 0 }
2042 static const struct bfd_elf_special_section special_sections_p[] =
2044 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2045 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2046 { NULL, 0, 0, 0, 0 }
2049 static const struct bfd_elf_special_section special_sections_r[] =
2051 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2052 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2053 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2054 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2055 { NULL, 0, 0, 0, 0 }
2058 static const struct bfd_elf_special_section special_sections_s[] =
2060 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2061 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2062 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2063 /* See struct bfd_elf_special_section declaration for the semantics of
2064 this special case where .prefix_length != strlen (.prefix). */
2065 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2066 { NULL, 0, 0, 0, 0 }
2069 static const struct bfd_elf_special_section special_sections_t[] =
2071 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2072 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2073 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2074 { NULL, 0, 0, 0, 0 }
2077 static const struct bfd_elf_special_section special_sections_z[] =
2079 { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 },
2080 { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 },
2081 { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 },
2082 { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 },
2083 { NULL, 0, 0, 0, 0 }
2086 static const struct bfd_elf_special_section *special_sections[] =
2088 special_sections_b, /* 'b' */
2089 special_sections_c, /* 'c' */
2090 special_sections_d, /* 'd' */
2092 special_sections_f, /* 'f' */
2093 special_sections_g, /* 'g' */
2094 special_sections_h, /* 'h' */
2095 special_sections_i, /* 'i' */
2098 special_sections_l, /* 'l' */
2100 special_sections_n, /* 'n' */
2102 special_sections_p, /* 'p' */
2104 special_sections_r, /* 'r' */
2105 special_sections_s, /* 's' */
2106 special_sections_t, /* 't' */
2112 special_sections_z /* 'z' */
2115 const struct bfd_elf_special_section *
2116 _bfd_elf_get_special_section (const char *name,
2117 const struct bfd_elf_special_section *spec,
2123 len = strlen (name);
2125 for (i = 0; spec[i].prefix != NULL; i++)
2128 int prefix_len = spec[i].prefix_length;
2130 if (len < prefix_len)
2132 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2135 suffix_len = spec[i].suffix_length;
2136 if (suffix_len <= 0)
2138 if (name[prefix_len] != 0)
2140 if (suffix_len == 0)
2142 if (name[prefix_len] != '.'
2143 && (suffix_len == -2
2144 || (rela && spec[i].type == SHT_REL)))
2150 if (len < prefix_len + suffix_len)
2152 if (memcmp (name + len - suffix_len,
2153 spec[i].prefix + prefix_len,
2163 const struct bfd_elf_special_section *
2164 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2167 const struct bfd_elf_special_section *spec;
2168 const struct elf_backend_data *bed;
2170 /* See if this is one of the special sections. */
2171 if (sec->name == NULL)
2174 bed = get_elf_backend_data (abfd);
2175 spec = bed->special_sections;
2178 spec = _bfd_elf_get_special_section (sec->name,
2179 bed->special_sections,
2185 if (sec->name[0] != '.')
2188 i = sec->name[1] - 'b';
2189 if (i < 0 || i > 'z' - 'b')
2192 spec = special_sections[i];
2197 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2201 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2203 struct bfd_elf_section_data *sdata;
2204 const struct elf_backend_data *bed;
2205 const struct bfd_elf_special_section *ssect;
2207 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2210 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2213 sec->used_by_bfd = sdata;
2216 /* Indicate whether or not this section should use RELA relocations. */
2217 bed = get_elf_backend_data (abfd);
2218 sec->use_rela_p = bed->default_use_rela_p;
2220 /* When we read a file, we don't need to set ELF section type and
2221 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2222 anyway. We will set ELF section type and flags for all linker
2223 created sections. If user specifies BFD section flags, we will
2224 set ELF section type and flags based on BFD section flags in
2225 elf_fake_sections. */
2226 if ((!sec->flags && abfd->direction != read_direction)
2227 || (sec->flags & SEC_LINKER_CREATED) != 0)
2229 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2232 elf_section_type (sec) = ssect->type;
2233 elf_section_flags (sec) = ssect->attr;
2237 return _bfd_generic_new_section_hook (abfd, sec);
2240 /* Create a new bfd section from an ELF program header.
2242 Since program segments have no names, we generate a synthetic name
2243 of the form segment<NUM>, where NUM is generally the index in the
2244 program header table. For segments that are split (see below) we
2245 generate the names segment<NUM>a and segment<NUM>b.
2247 Note that some program segments may have a file size that is different than
2248 (less than) the memory size. All this means is that at execution the
2249 system must allocate the amount of memory specified by the memory size,
2250 but only initialize it with the first "file size" bytes read from the
2251 file. This would occur for example, with program segments consisting
2252 of combined data+bss.
2254 To handle the above situation, this routine generates TWO bfd sections
2255 for the single program segment. The first has the length specified by
2256 the file size of the segment, and the second has the length specified
2257 by the difference between the two sizes. In effect, the segment is split
2258 into its initialized and uninitialized parts.
2263 _bfd_elf_make_section_from_phdr (bfd *abfd,
2264 Elf_Internal_Phdr *hdr,
2266 const char *typename)
2274 split = ((hdr->p_memsz > 0)
2275 && (hdr->p_filesz > 0)
2276 && (hdr->p_memsz > hdr->p_filesz));
2278 if (hdr->p_filesz > 0)
2280 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2281 len = strlen (namebuf) + 1;
2282 name = bfd_alloc (abfd, len);
2285 memcpy (name, namebuf, len);
2286 newsect = bfd_make_section (abfd, name);
2287 if (newsect == NULL)
2289 newsect->vma = hdr->p_vaddr;
2290 newsect->lma = hdr->p_paddr;
2291 newsect->size = hdr->p_filesz;
2292 newsect->filepos = hdr->p_offset;
2293 newsect->flags |= SEC_HAS_CONTENTS;
2294 newsect->alignment_power = bfd_log2 (hdr->p_align);
2295 if (hdr->p_type == PT_LOAD)
2297 newsect->flags |= SEC_ALLOC;
2298 newsect->flags |= SEC_LOAD;
2299 if (hdr->p_flags & PF_X)
2301 /* FIXME: all we known is that it has execute PERMISSION,
2303 newsect->flags |= SEC_CODE;
2306 if (!(hdr->p_flags & PF_W))
2308 newsect->flags |= SEC_READONLY;
2312 if (hdr->p_memsz > hdr->p_filesz)
2316 sprintf (namebuf, "%s%d%s", typename, index, split ? "b" : "");
2317 len = strlen (namebuf) + 1;
2318 name = bfd_alloc (abfd, len);
2321 memcpy (name, namebuf, len);
2322 newsect = bfd_make_section (abfd, name);
2323 if (newsect == NULL)
2325 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2326 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2327 newsect->size = hdr->p_memsz - hdr->p_filesz;
2328 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2329 align = newsect->vma & -newsect->vma;
2330 if (align == 0 || align > hdr->p_align)
2331 align = hdr->p_align;
2332 newsect->alignment_power = bfd_log2 (align);
2333 if (hdr->p_type == PT_LOAD)
2335 /* Hack for gdb. Segments that have not been modified do
2336 not have their contents written to a core file, on the
2337 assumption that a debugger can find the contents in the
2338 executable. We flag this case by setting the fake
2339 section size to zero. Note that "real" bss sections will
2340 always have their contents dumped to the core file. */
2341 if (bfd_get_format (abfd) == bfd_core)
2343 newsect->flags |= SEC_ALLOC;
2344 if (hdr->p_flags & PF_X)
2345 newsect->flags |= SEC_CODE;
2347 if (!(hdr->p_flags & PF_W))
2348 newsect->flags |= SEC_READONLY;
2355 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2357 const struct elf_backend_data *bed;
2359 switch (hdr->p_type)
2362 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2365 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2368 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2371 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2374 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2376 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2381 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2384 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2386 case PT_GNU_EH_FRAME:
2387 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2391 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2394 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
2397 /* Check for any processor-specific program segment types. */
2398 bed = get_elf_backend_data (abfd);
2399 return bed->elf_backend_section_from_phdr (abfd, hdr, index, "proc");
2403 /* Initialize REL_HDR, the section-header for new section, containing
2404 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2405 relocations; otherwise, we use REL relocations. */
2408 _bfd_elf_init_reloc_shdr (bfd *abfd,
2409 Elf_Internal_Shdr *rel_hdr,
2411 bfd_boolean use_rela_p)
2414 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2415 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2417 name = bfd_alloc (abfd, amt);
2420 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2422 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2424 if (rel_hdr->sh_name == (unsigned int) -1)
2426 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2427 rel_hdr->sh_entsize = (use_rela_p
2428 ? bed->s->sizeof_rela
2429 : bed->s->sizeof_rel);
2430 rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
2431 rel_hdr->sh_flags = 0;
2432 rel_hdr->sh_addr = 0;
2433 rel_hdr->sh_size = 0;
2434 rel_hdr->sh_offset = 0;
2439 /* Return the default section type based on the passed in section flags. */
2442 bfd_elf_get_default_section_type (flagword flags)
2444 if ((flags & SEC_ALLOC) != 0
2445 && ((flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0
2446 || (flags & SEC_NEVER_LOAD) != 0))
2448 return SHT_PROGBITS;
2451 /* Set up an ELF internal section header for a section. */
2454 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2456 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2457 bfd_boolean *failedptr = failedptrarg;
2458 Elf_Internal_Shdr *this_hdr;
2459 unsigned int sh_type;
2463 /* We already failed; just get out of the bfd_map_over_sections
2468 this_hdr = &elf_section_data (asect)->this_hdr;
2470 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2471 asect->name, FALSE);
2472 if (this_hdr->sh_name == (unsigned int) -1)
2478 /* Don't clear sh_flags. Assembler may set additional bits. */
2480 if ((asect->flags & SEC_ALLOC) != 0
2481 || asect->user_set_vma)
2482 this_hdr->sh_addr = asect->vma;
2484 this_hdr->sh_addr = 0;
2486 this_hdr->sh_offset = 0;
2487 this_hdr->sh_size = asect->size;
2488 this_hdr->sh_link = 0;
2489 this_hdr->sh_addralign = (bfd_vma) 1 << asect->alignment_power;
2490 /* The sh_entsize and sh_info fields may have been set already by
2491 copy_private_section_data. */
2493 this_hdr->bfd_section = asect;
2494 this_hdr->contents = NULL;
2496 /* If the section type is unspecified, we set it based on
2498 if ((asect->flags & SEC_GROUP) != 0)
2499 sh_type = SHT_GROUP;
2501 sh_type = bfd_elf_get_default_section_type (asect->flags);
2503 if (this_hdr->sh_type == SHT_NULL)
2504 this_hdr->sh_type = sh_type;
2505 else if (this_hdr->sh_type == SHT_NOBITS
2506 && sh_type == SHT_PROGBITS
2507 && (asect->flags & SEC_ALLOC) != 0)
2509 /* Warn if we are changing a NOBITS section to PROGBITS, but
2510 allow the link to proceed. This can happen when users link
2511 non-bss input sections to bss output sections, or emit data
2512 to a bss output section via a linker script. */
2513 (*_bfd_error_handler)
2514 (_("warning: section `%A' type changed to PROGBITS"), asect);
2515 this_hdr->sh_type = sh_type;
2518 switch (this_hdr->sh_type)
2524 case SHT_INIT_ARRAY:
2525 case SHT_FINI_ARRAY:
2526 case SHT_PREINIT_ARRAY:
2533 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2537 this_hdr->sh_entsize = bed->s->sizeof_sym;
2541 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2545 if (get_elf_backend_data (abfd)->may_use_rela_p)
2546 this_hdr->sh_entsize = bed->s->sizeof_rela;
2550 if (get_elf_backend_data (abfd)->may_use_rel_p)
2551 this_hdr->sh_entsize = bed->s->sizeof_rel;
2554 case SHT_GNU_versym:
2555 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2558 case SHT_GNU_verdef:
2559 this_hdr->sh_entsize = 0;
2560 /* objcopy or strip will copy over sh_info, but may not set
2561 cverdefs. The linker will set cverdefs, but sh_info will be
2563 if (this_hdr->sh_info == 0)
2564 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2566 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2567 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2570 case SHT_GNU_verneed:
2571 this_hdr->sh_entsize = 0;
2572 /* objcopy or strip will copy over sh_info, but may not set
2573 cverrefs. The linker will set cverrefs, but sh_info will be
2575 if (this_hdr->sh_info == 0)
2576 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2578 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2579 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2583 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
2587 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
2591 if ((asect->flags & SEC_ALLOC) != 0)
2592 this_hdr->sh_flags |= SHF_ALLOC;
2593 if ((asect->flags & SEC_READONLY) == 0)
2594 this_hdr->sh_flags |= SHF_WRITE;
2595 if ((asect->flags & SEC_CODE) != 0)
2596 this_hdr->sh_flags |= SHF_EXECINSTR;
2597 if ((asect->flags & SEC_MERGE) != 0)
2599 this_hdr->sh_flags |= SHF_MERGE;
2600 this_hdr->sh_entsize = asect->entsize;
2601 if ((asect->flags & SEC_STRINGS) != 0)
2602 this_hdr->sh_flags |= SHF_STRINGS;
2604 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2605 this_hdr->sh_flags |= SHF_GROUP;
2606 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2608 this_hdr->sh_flags |= SHF_TLS;
2609 if (asect->size == 0
2610 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2612 struct bfd_link_order *o = asect->map_tail.link_order;
2614 this_hdr->sh_size = 0;
2617 this_hdr->sh_size = o->offset + o->size;
2618 if (this_hdr->sh_size != 0)
2619 this_hdr->sh_type = SHT_NOBITS;
2624 /* Check for processor-specific section types. */
2625 sh_type = this_hdr->sh_type;
2626 if (bed->elf_backend_fake_sections
2627 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2630 if (sh_type == SHT_NOBITS && asect->size != 0)
2632 /* Don't change the header type from NOBITS if we are being
2633 called for objcopy --only-keep-debug. */
2634 this_hdr->sh_type = sh_type;
2637 /* If the section has relocs, set up a section header for the
2638 SHT_REL[A] section. If two relocation sections are required for
2639 this section, it is up to the processor-specific back-end to
2640 create the other. */
2641 if ((asect->flags & SEC_RELOC) != 0
2642 && !_bfd_elf_init_reloc_shdr (abfd,
2643 &elf_section_data (asect)->rel_hdr,
2649 /* Fill in the contents of a SHT_GROUP section. Called from
2650 _bfd_elf_compute_section_file_positions for gas, objcopy, and
2651 when ELF targets use the generic linker, ld. Called for ld -r
2652 from bfd_elf_final_link. */
2655 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2657 bfd_boolean *failedptr = failedptrarg;
2658 asection *elt, *first;
2662 /* Ignore linker created group section. See elfNN_ia64_object_p in
2664 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2668 if (elf_section_data (sec)->this_hdr.sh_info == 0)
2670 unsigned long symindx = 0;
2672 /* elf_group_id will have been set up by objcopy and the
2674 if (elf_group_id (sec) != NULL)
2675 symindx = elf_group_id (sec)->udata.i;
2679 /* If called from the assembler, swap_out_syms will have set up
2680 elf_section_syms. */
2681 BFD_ASSERT (elf_section_syms (abfd) != NULL);
2682 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2684 elf_section_data (sec)->this_hdr.sh_info = symindx;
2686 else if (elf_section_data (sec)->this_hdr.sh_info == (unsigned int) -2)
2688 /* The ELF backend linker sets sh_info to -2 when the group
2689 signature symbol is global, and thus the index can't be
2690 set until all local symbols are output. */
2691 asection *igroup = elf_sec_group (elf_next_in_group (sec));
2692 struct bfd_elf_section_data *sec_data = elf_section_data (igroup);
2693 unsigned long symndx = sec_data->this_hdr.sh_info;
2694 unsigned long extsymoff = 0;
2695 struct elf_link_hash_entry *h;
2697 if (!elf_bad_symtab (igroup->owner))
2699 Elf_Internal_Shdr *symtab_hdr;
2701 symtab_hdr = &elf_tdata (igroup->owner)->symtab_hdr;
2702 extsymoff = symtab_hdr->sh_info;
2704 h = elf_sym_hashes (igroup->owner)[symndx - extsymoff];
2705 while (h->root.type == bfd_link_hash_indirect
2706 || h->root.type == bfd_link_hash_warning)
2707 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2709 elf_section_data (sec)->this_hdr.sh_info = h->indx;
2712 /* The contents won't be allocated for "ld -r" or objcopy. */
2714 if (sec->contents == NULL)
2717 sec->contents = bfd_alloc (abfd, sec->size);
2719 /* Arrange for the section to be written out. */
2720 elf_section_data (sec)->this_hdr.contents = sec->contents;
2721 if (sec->contents == NULL)
2728 loc = sec->contents + sec->size;
2730 /* Get the pointer to the first section in the group that gas
2731 squirreled away here. objcopy arranges for this to be set to the
2732 start of the input section group. */
2733 first = elt = elf_next_in_group (sec);
2735 /* First element is a flag word. Rest of section is elf section
2736 indices for all the sections of the group. Write them backwards
2737 just to keep the group in the same order as given in .section
2738 directives, not that it matters. */
2745 if (! elf_discarded_section (s))
2749 s = s->output_section;
2752 idx = elf_section_data (s)->this_idx;
2753 H_PUT_32 (abfd, idx, loc);
2755 elt = elf_next_in_group (elt);
2760 if ((loc -= 4) != sec->contents)
2763 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2766 /* Assign all ELF section numbers. The dummy first section is handled here
2767 too. The link/info pointers for the standard section types are filled
2768 in here too, while we're at it. */
2771 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2773 struct elf_obj_tdata *t = elf_tdata (abfd);
2775 unsigned int section_number, secn;
2776 Elf_Internal_Shdr **i_shdrp;
2777 struct bfd_elf_section_data *d;
2778 bfd_boolean need_symtab;
2782 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2784 /* SHT_GROUP sections are in relocatable files only. */
2785 if (link_info == NULL || link_info->relocatable)
2787 /* Put SHT_GROUP sections first. */
2788 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2790 d = elf_section_data (sec);
2792 if (d->this_hdr.sh_type == SHT_GROUP)
2794 if (sec->flags & SEC_LINKER_CREATED)
2796 /* Remove the linker created SHT_GROUP sections. */
2797 bfd_section_list_remove (abfd, sec);
2798 abfd->section_count--;
2801 d->this_idx = section_number++;
2806 for (sec = abfd->sections; sec; sec = sec->next)
2808 d = elf_section_data (sec);
2810 if (d->this_hdr.sh_type != SHT_GROUP)
2811 d->this_idx = section_number++;
2812 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2813 if ((sec->flags & SEC_RELOC) == 0)
2817 d->rel_idx = section_number++;
2818 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2823 d->rel_idx2 = section_number++;
2824 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2830 t->shstrtab_section = section_number++;
2831 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2832 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2834 need_symtab = (bfd_get_symcount (abfd) > 0
2835 || (link_info == NULL
2836 && ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
2840 t->symtab_section = section_number++;
2841 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2842 if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
2844 t->symtab_shndx_section = section_number++;
2845 t->symtab_shndx_hdr.sh_name
2846 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2847 ".symtab_shndx", FALSE);
2848 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2851 t->strtab_section = section_number++;
2852 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2855 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2856 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2858 elf_numsections (abfd) = section_number;
2859 elf_elfheader (abfd)->e_shnum = section_number;
2861 /* Set up the list of section header pointers, in agreement with the
2863 i_shdrp = bfd_zalloc2 (abfd, section_number, sizeof (Elf_Internal_Shdr *));
2864 if (i_shdrp == NULL)
2867 i_shdrp[0] = bfd_zalloc (abfd, sizeof (Elf_Internal_Shdr));
2868 if (i_shdrp[0] == NULL)
2870 bfd_release (abfd, i_shdrp);
2874 elf_elfsections (abfd) = i_shdrp;
2876 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2879 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2880 if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF))
2882 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2883 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2885 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2886 t->symtab_hdr.sh_link = t->strtab_section;
2889 for (sec = abfd->sections; sec; sec = sec->next)
2891 struct bfd_elf_section_data *d = elf_section_data (sec);
2895 i_shdrp[d->this_idx] = &d->this_hdr;
2896 if (d->rel_idx != 0)
2897 i_shdrp[d->rel_idx] = &d->rel_hdr;
2898 if (d->rel_idx2 != 0)
2899 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2901 /* Fill in the sh_link and sh_info fields while we're at it. */
2903 /* sh_link of a reloc section is the section index of the symbol
2904 table. sh_info is the section index of the section to which
2905 the relocation entries apply. */
2906 if (d->rel_idx != 0)
2908 d->rel_hdr.sh_link = t->symtab_section;
2909 d->rel_hdr.sh_info = d->this_idx;
2911 if (d->rel_idx2 != 0)
2913 d->rel_hdr2->sh_link = t->symtab_section;
2914 d->rel_hdr2->sh_info = d->this_idx;
2917 /* We need to set up sh_link for SHF_LINK_ORDER. */
2918 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
2920 s = elf_linked_to_section (sec);
2923 /* elf_linked_to_section points to the input section. */
2924 if (link_info != NULL)
2926 /* Check discarded linkonce section. */
2927 if (elf_discarded_section (s))
2930 (*_bfd_error_handler)
2931 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
2932 abfd, d->this_hdr.bfd_section,
2934 /* Point to the kept section if it has the same
2935 size as the discarded one. */
2936 kept = _bfd_elf_check_kept_section (s, link_info);
2939 bfd_set_error (bfd_error_bad_value);
2945 s = s->output_section;
2946 BFD_ASSERT (s != NULL);
2950 /* Handle objcopy. */
2951 if (s->output_section == NULL)
2953 (*_bfd_error_handler)
2954 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
2955 abfd, d->this_hdr.bfd_section, s, s->owner);
2956 bfd_set_error (bfd_error_bad_value);
2959 s = s->output_section;
2961 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2966 The Intel C compiler generates SHT_IA_64_UNWIND with
2967 SHF_LINK_ORDER. But it doesn't set the sh_link or
2968 sh_info fields. Hence we could get the situation
2970 const struct elf_backend_data *bed
2971 = get_elf_backend_data (abfd);
2972 if (bed->link_order_error_handler)
2973 bed->link_order_error_handler
2974 (_("%B: warning: sh_link not set for section `%A'"),
2979 switch (d->this_hdr.sh_type)
2983 /* A reloc section which we are treating as a normal BFD
2984 section. sh_link is the section index of the symbol
2985 table. sh_info is the section index of the section to
2986 which the relocation entries apply. We assume that an
2987 allocated reloc section uses the dynamic symbol table.
2988 FIXME: How can we be sure? */
2989 s = bfd_get_section_by_name (abfd, ".dynsym");
2991 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2993 /* We look up the section the relocs apply to by name. */
2995 if (d->this_hdr.sh_type == SHT_REL)
2999 s = bfd_get_section_by_name (abfd, name);
3001 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3005 /* We assume that a section named .stab*str is a stabs
3006 string section. We look for a section with the same name
3007 but without the trailing ``str'', and set its sh_link
3008 field to point to this section. */
3009 if (CONST_STRNEQ (sec->name, ".stab")
3010 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3015 len = strlen (sec->name);
3016 alc = bfd_malloc (len - 2);
3019 memcpy (alc, sec->name, len - 3);
3020 alc[len - 3] = '\0';
3021 s = bfd_get_section_by_name (abfd, alc);
3025 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3027 /* This is a .stab section. */
3028 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3029 elf_section_data (s)->this_hdr.sh_entsize
3030 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3037 case SHT_GNU_verneed:
3038 case SHT_GNU_verdef:
3039 /* sh_link is the section header index of the string table
3040 used for the dynamic entries, or the symbol table, or the
3042 s = bfd_get_section_by_name (abfd, ".dynstr");
3044 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3047 case SHT_GNU_LIBLIST:
3048 /* sh_link is the section header index of the prelink library
3049 list used for the dynamic entries, or the symbol table, or
3050 the version strings. */
3051 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3052 ? ".dynstr" : ".gnu.libstr");
3054 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3059 case SHT_GNU_versym:
3060 /* sh_link is the section header index of the symbol table
3061 this hash table or version table is for. */
3062 s = bfd_get_section_by_name (abfd, ".dynsym");
3064 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3068 d->this_hdr.sh_link = t->symtab_section;
3072 for (secn = 1; secn < section_number; ++secn)
3073 if (i_shdrp[secn] == NULL)
3074 i_shdrp[secn] = i_shdrp[0];
3076 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3077 i_shdrp[secn]->sh_name);
3081 /* Map symbol from it's internal number to the external number, moving
3082 all local symbols to be at the head of the list. */
3085 sym_is_global (bfd *abfd, asymbol *sym)
3087 /* If the backend has a special mapping, use it. */
3088 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3089 if (bed->elf_backend_sym_is_global)
3090 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3092 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_GNU_UNIQUE)) != 0
3093 || bfd_is_und_section (bfd_get_section (sym))
3094 || bfd_is_com_section (bfd_get_section (sym)));
3097 /* Don't output section symbols for sections that are not going to be
3101 ignore_section_sym (bfd *abfd, asymbol *sym)
3103 return ((sym->flags & BSF_SECTION_SYM) != 0
3104 && !(sym->section->owner == abfd
3105 || (sym->section->output_section->owner == abfd
3106 && sym->section->output_offset == 0)));
3110 elf_map_symbols (bfd *abfd)
3112 unsigned int symcount = bfd_get_symcount (abfd);
3113 asymbol **syms = bfd_get_outsymbols (abfd);
3114 asymbol **sect_syms;
3115 unsigned int num_locals = 0;
3116 unsigned int num_globals = 0;
3117 unsigned int num_locals2 = 0;
3118 unsigned int num_globals2 = 0;
3125 fprintf (stderr, "elf_map_symbols\n");
3129 for (asect = abfd->sections; asect; asect = asect->next)
3131 if (max_index < asect->index)
3132 max_index = asect->index;
3136 sect_syms = bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3137 if (sect_syms == NULL)
3139 elf_section_syms (abfd) = sect_syms;
3140 elf_num_section_syms (abfd) = max_index;
3142 /* Init sect_syms entries for any section symbols we have already
3143 decided to output. */
3144 for (idx = 0; idx < symcount; idx++)
3146 asymbol *sym = syms[idx];
3148 if ((sym->flags & BSF_SECTION_SYM) != 0
3150 && !ignore_section_sym (abfd, sym))
3152 asection *sec = sym->section;
3154 if (sec->owner != abfd)
3155 sec = sec->output_section;
3157 sect_syms[sec->index] = syms[idx];
3161 /* Classify all of the symbols. */
3162 for (idx = 0; idx < symcount; idx++)
3164 if (ignore_section_sym (abfd, syms[idx]))
3166 if (!sym_is_global (abfd, syms[idx]))
3172 /* We will be adding a section symbol for each normal BFD section. Most
3173 sections will already have a section symbol in outsymbols, but
3174 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3175 at least in that case. */
3176 for (asect = abfd->sections; asect; asect = asect->next)
3178 if (sect_syms[asect->index] == NULL)
3180 if (!sym_is_global (abfd, asect->symbol))
3187 /* Now sort the symbols so the local symbols are first. */
3188 new_syms = bfd_alloc2 (abfd, num_locals + num_globals, sizeof (asymbol *));
3190 if (new_syms == NULL)
3193 for (idx = 0; idx < symcount; idx++)
3195 asymbol *sym = syms[idx];
3198 if (ignore_section_sym (abfd, sym))
3200 if (!sym_is_global (abfd, sym))
3203 i = num_locals + num_globals2++;
3205 sym->udata.i = i + 1;
3207 for (asect = abfd->sections; asect; asect = asect->next)
3209 if (sect_syms[asect->index] == NULL)
3211 asymbol *sym = asect->symbol;
3214 sect_syms[asect->index] = sym;
3215 if (!sym_is_global (abfd, sym))
3218 i = num_locals + num_globals2++;
3220 sym->udata.i = i + 1;
3224 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3226 elf_num_locals (abfd) = num_locals;
3227 elf_num_globals (abfd) = num_globals;
3231 /* Align to the maximum file alignment that could be required for any
3232 ELF data structure. */
3234 static inline file_ptr
3235 align_file_position (file_ptr off, int align)
3237 return (off + align - 1) & ~(align - 1);
3240 /* Assign a file position to a section, optionally aligning to the
3241 required section alignment. */
3244 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3248 if (align && i_shdrp->sh_addralign > 1)
3249 offset = BFD_ALIGN (offset, i_shdrp->sh_addralign);
3250 i_shdrp->sh_offset = offset;
3251 if (i_shdrp->bfd_section != NULL)
3252 i_shdrp->bfd_section->filepos = offset;
3253 if (i_shdrp->sh_type != SHT_NOBITS)
3254 offset += i_shdrp->sh_size;
3258 /* Compute the file positions we are going to put the sections at, and
3259 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3260 is not NULL, this is being called by the ELF backend linker. */
3263 _bfd_elf_compute_section_file_positions (bfd *abfd,
3264 struct bfd_link_info *link_info)
3266 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3268 struct bfd_strtab_hash *strtab = NULL;
3269 Elf_Internal_Shdr *shstrtab_hdr;
3270 bfd_boolean need_symtab;
3272 if (abfd->output_has_begun)
3275 /* Do any elf backend specific processing first. */
3276 if (bed->elf_backend_begin_write_processing)
3277 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3279 if (! prep_headers (abfd))
3282 /* Post process the headers if necessary. */
3283 if (bed->elf_backend_post_process_headers)
3284 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3287 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3291 if (!assign_section_numbers (abfd, link_info))
3294 /* The backend linker builds symbol table information itself. */
3295 need_symtab = (link_info == NULL
3296 && (bfd_get_symcount (abfd) > 0
3297 || ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3301 /* Non-zero if doing a relocatable link. */
3302 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3304 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3308 if (link_info == NULL)
3310 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3315 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3316 /* sh_name was set in prep_headers. */
3317 shstrtab_hdr->sh_type = SHT_STRTAB;
3318 shstrtab_hdr->sh_flags = 0;
3319 shstrtab_hdr->sh_addr = 0;
3320 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3321 shstrtab_hdr->sh_entsize = 0;
3322 shstrtab_hdr->sh_link = 0;
3323 shstrtab_hdr->sh_info = 0;
3324 /* sh_offset is set in assign_file_positions_except_relocs. */
3325 shstrtab_hdr->sh_addralign = 1;
3327 if (!assign_file_positions_except_relocs (abfd, link_info))
3333 Elf_Internal_Shdr *hdr;
3335 off = elf_tdata (abfd)->next_file_pos;
3337 hdr = &elf_tdata (abfd)->symtab_hdr;
3338 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3340 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3341 if (hdr->sh_size != 0)
3342 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3344 hdr = &elf_tdata (abfd)->strtab_hdr;
3345 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3347 elf_tdata (abfd)->next_file_pos = off;
3349 /* Now that we know where the .strtab section goes, write it
3351 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3352 || ! _bfd_stringtab_emit (abfd, strtab))
3354 _bfd_stringtab_free (strtab);
3357 abfd->output_has_begun = TRUE;
3362 /* Make an initial estimate of the size of the program header. If we
3363 get the number wrong here, we'll redo section placement. */
3365 static bfd_size_type
3366 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3370 const struct elf_backend_data *bed;
3372 /* Assume we will need exactly two PT_LOAD segments: one for text
3373 and one for data. */
3376 s = bfd_get_section_by_name (abfd, ".interp");
3377 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3379 /* If we have a loadable interpreter section, we need a
3380 PT_INTERP segment. In this case, assume we also need a
3381 PT_PHDR segment, although that may not be true for all
3386 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3388 /* We need a PT_DYNAMIC segment. */
3392 if (info != NULL && info->relro)
3394 /* We need a PT_GNU_RELRO segment. */
3398 if (elf_tdata (abfd)->eh_frame_hdr)
3400 /* We need a PT_GNU_EH_FRAME segment. */
3404 if (elf_tdata (abfd)->stack_flags)
3406 /* We need a PT_GNU_STACK segment. */
3410 for (s = abfd->sections; s != NULL; s = s->next)
3412 if ((s->flags & SEC_LOAD) != 0
3413 && CONST_STRNEQ (s->name, ".note"))
3415 /* We need a PT_NOTE segment. */
3417 /* Try to create just one PT_NOTE segment
3418 for all adjacent loadable .note* sections.
3419 gABI requires that within a PT_NOTE segment
3420 (and also inside of each SHT_NOTE section)
3421 each note is padded to a multiple of 4 size,
3422 so we check whether the sections are correctly
3424 if (s->alignment_power == 2)
3425 while (s->next != NULL
3426 && s->next->alignment_power == 2
3427 && (s->next->flags & SEC_LOAD) != 0
3428 && CONST_STRNEQ (s->next->name, ".note"))
3433 for (s = abfd->sections; s != NULL; s = s->next)
3435 if (s->flags & SEC_THREAD_LOCAL)
3437 /* We need a PT_TLS segment. */
3443 /* Let the backend count up any program headers it might need. */
3444 bed = get_elf_backend_data (abfd);
3445 if (bed->elf_backend_additional_program_headers)
3449 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3455 return segs * bed->s->sizeof_phdr;
3458 /* Find the segment that contains the output_section of section. */
3461 _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section)
3463 struct elf_segment_map *m;
3464 Elf_Internal_Phdr *p;
3466 for (m = elf_tdata (abfd)->segment_map,
3467 p = elf_tdata (abfd)->phdr;
3473 for (i = m->count - 1; i >= 0; i--)
3474 if (m->sections[i] == section)
3481 /* Create a mapping from a set of sections to a program segment. */
3483 static struct elf_segment_map *
3484 make_mapping (bfd *abfd,
3485 asection **sections,
3490 struct elf_segment_map *m;
3495 amt = sizeof (struct elf_segment_map);
3496 amt += (to - from - 1) * sizeof (asection *);
3497 m = bfd_zalloc (abfd, amt);
3501 m->p_type = PT_LOAD;
3502 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3503 m->sections[i - from] = *hdrpp;
3504 m->count = to - from;
3506 if (from == 0 && phdr)
3508 /* Include the headers in the first PT_LOAD segment. */
3509 m->includes_filehdr = 1;
3510 m->includes_phdrs = 1;
3516 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3519 struct elf_segment_map *
3520 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3522 struct elf_segment_map *m;
3524 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3528 m->p_type = PT_DYNAMIC;
3530 m->sections[0] = dynsec;
3535 /* Possibly add or remove segments from the segment map. */
3538 elf_modify_segment_map (bfd *abfd,
3539 struct bfd_link_info *info,
3540 bfd_boolean remove_empty_load)
3542 struct elf_segment_map **m;
3543 const struct elf_backend_data *bed;
3545 /* The placement algorithm assumes that non allocated sections are
3546 not in PT_LOAD segments. We ensure this here by removing such
3547 sections from the segment map. We also remove excluded
3548 sections. Finally, any PT_LOAD segment without sections is
3550 m = &elf_tdata (abfd)->segment_map;
3553 unsigned int i, new_count;
3555 for (new_count = 0, i = 0; i < (*m)->count; i++)
3557 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3558 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3559 || (*m)->p_type != PT_LOAD))
3561 (*m)->sections[new_count] = (*m)->sections[i];
3565 (*m)->count = new_count;
3567 if (remove_empty_load && (*m)->p_type == PT_LOAD && (*m)->count == 0)
3573 bed = get_elf_backend_data (abfd);
3574 if (bed->elf_backend_modify_segment_map != NULL)
3576 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3583 /* Set up a mapping from BFD sections to program segments. */
3586 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3589 struct elf_segment_map *m;
3590 asection **sections = NULL;
3591 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3592 bfd_boolean no_user_phdrs;
3594 no_user_phdrs = elf_tdata (abfd)->segment_map == NULL;
3595 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
3599 struct elf_segment_map *mfirst;
3600 struct elf_segment_map **pm;
3603 unsigned int phdr_index;
3604 bfd_vma maxpagesize;
3606 bfd_boolean phdr_in_segment = TRUE;
3607 bfd_boolean writable;
3609 asection *first_tls = NULL;
3610 asection *dynsec, *eh_frame_hdr;
3613 /* Select the allocated sections, and sort them. */
3615 sections = bfd_malloc2 (bfd_count_sections (abfd), sizeof (asection *));
3616 if (sections == NULL)
3620 for (s = abfd->sections; s != NULL; s = s->next)
3622 if ((s->flags & SEC_ALLOC) != 0)
3628 BFD_ASSERT (i <= bfd_count_sections (abfd));
3631 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3633 /* Build the mapping. */
3638 /* If we have a .interp section, then create a PT_PHDR segment for
3639 the program headers and a PT_INTERP segment for the .interp
3641 s = bfd_get_section_by_name (abfd, ".interp");
3642 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3644 amt = sizeof (struct elf_segment_map);
3645 m = bfd_zalloc (abfd, amt);
3649 m->p_type = PT_PHDR;
3650 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3651 m->p_flags = PF_R | PF_X;
3652 m->p_flags_valid = 1;
3653 m->includes_phdrs = 1;
3658 amt = sizeof (struct elf_segment_map);
3659 m = bfd_zalloc (abfd, amt);
3663 m->p_type = PT_INTERP;
3671 /* Look through the sections. We put sections in the same program
3672 segment when the start of the second section can be placed within
3673 a few bytes of the end of the first section. */
3677 maxpagesize = bed->maxpagesize;
3679 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3681 && (dynsec->flags & SEC_LOAD) == 0)
3684 /* Deal with -Ttext or something similar such that the first section
3685 is not adjacent to the program headers. This is an
3686 approximation, since at this point we don't know exactly how many
3687 program headers we will need. */
3690 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
3692 if (phdr_size == (bfd_size_type) -1)
3693 phdr_size = get_program_header_size (abfd, info);
3694 if ((abfd->flags & D_PAGED) == 0
3695 || sections[0]->lma < phdr_size
3696 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3697 phdr_in_segment = FALSE;
3700 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3703 bfd_boolean new_segment;
3707 /* See if this section and the last one will fit in the same
3710 if (last_hdr == NULL)
3712 /* If we don't have a segment yet, then we don't need a new
3713 one (we build the last one after this loop). */
3714 new_segment = FALSE;
3716 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3718 /* If this section has a different relation between the
3719 virtual address and the load address, then we need a new
3723 /* In the next test we have to be careful when last_hdr->lma is close
3724 to the end of the address space. If the aligned address wraps
3725 around to the start of the address space, then there are no more
3726 pages left in memory and it is OK to assume that the current
3727 section can be included in the current segment. */
3728 else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3730 && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3733 /* If putting this section in this segment would force us to
3734 skip a page in the segment, then we need a new segment. */
3737 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3738 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3740 /* We don't want to put a loadable section after a
3741 nonloadable section in the same segment.
3742 Consider .tbss sections as loadable for this purpose. */
3745 else if ((abfd->flags & D_PAGED) == 0)
3747 /* If the file is not demand paged, which means that we
3748 don't require the sections to be correctly aligned in the
3749 file, then there is no other reason for a new segment. */
3750 new_segment = FALSE;
3753 && (hdr->flags & SEC_READONLY) == 0
3754 && (((last_hdr->lma + last_size - 1)
3755 & ~(maxpagesize - 1))
3756 != (hdr->lma & ~(maxpagesize - 1))))
3758 /* We don't want to put a writable section in a read only
3759 segment, unless they are on the same page in memory
3760 anyhow. We already know that the last section does not
3761 bring us past the current section on the page, so the
3762 only case in which the new section is not on the same
3763 page as the previous section is when the previous section
3764 ends precisely on a page boundary. */
3769 /* Otherwise, we can use the same segment. */
3770 new_segment = FALSE;
3773 /* Allow interested parties a chance to override our decision. */
3774 if (last_hdr != NULL
3776 && info->callbacks->override_segment_assignment != NULL)
3778 = info->callbacks->override_segment_assignment (info, abfd, hdr,
3784 if ((hdr->flags & SEC_READONLY) == 0)
3787 /* .tbss sections effectively have zero size. */
3788 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
3789 != SEC_THREAD_LOCAL)
3790 last_size = hdr->size;
3796 /* We need a new program segment. We must create a new program
3797 header holding all the sections from phdr_index until hdr. */
3799 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3806 if ((hdr->flags & SEC_READONLY) == 0)
3812 /* .tbss sections effectively have zero size. */
3813 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3814 last_size = hdr->size;
3818 phdr_in_segment = FALSE;
3821 /* Create a final PT_LOAD program segment. */
3822 if (last_hdr != NULL)
3824 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3832 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3835 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3842 /* For each batch of consecutive loadable .note sections,
3843 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
3844 because if we link together nonloadable .note sections and
3845 loadable .note sections, we will generate two .note sections
3846 in the output file. FIXME: Using names for section types is
3848 for (s = abfd->sections; s != NULL; s = s->next)
3850 if ((s->flags & SEC_LOAD) != 0
3851 && CONST_STRNEQ (s->name, ".note"))
3855 amt = sizeof (struct elf_segment_map);
3856 if (s->alignment_power == 2)
3857 for (s2 = s; s2->next != NULL; s2 = s2->next)
3859 if (s2->next->alignment_power == 2
3860 && (s2->next->flags & SEC_LOAD) != 0
3861 && CONST_STRNEQ (s2->next->name, ".note")
3862 && align_power (s2->vma + s2->size, 2)
3868 amt += (count - 1) * sizeof (asection *);
3869 m = bfd_zalloc (abfd, amt);
3873 m->p_type = PT_NOTE;
3877 m->sections[m->count - count--] = s;
3878 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3881 m->sections[m->count - 1] = s;
3882 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3886 if (s->flags & SEC_THREAD_LOCAL)
3894 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3899 amt = sizeof (struct elf_segment_map);
3900 amt += (tls_count - 1) * sizeof (asection *);
3901 m = bfd_zalloc (abfd, amt);
3906 m->count = tls_count;
3907 /* Mandated PF_R. */
3909 m->p_flags_valid = 1;
3910 for (i = 0; i < tls_count; ++i)
3912 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3913 m->sections[i] = first_tls;
3914 first_tls = first_tls->next;
3921 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3923 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3924 if (eh_frame_hdr != NULL
3925 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3927 amt = sizeof (struct elf_segment_map);
3928 m = bfd_zalloc (abfd, amt);
3932 m->p_type = PT_GNU_EH_FRAME;
3934 m->sections[0] = eh_frame_hdr->output_section;
3940 if (elf_tdata (abfd)->stack_flags)
3942 amt = sizeof (struct elf_segment_map);
3943 m = bfd_zalloc (abfd, amt);
3947 m->p_type = PT_GNU_STACK;
3948 m->p_flags = elf_tdata (abfd)->stack_flags;
3949 m->p_flags_valid = 1;
3955 if (info != NULL && info->relro)
3957 for (m = mfirst; m != NULL; m = m->next)
3959 if (m->p_type == PT_LOAD)
3961 asection *last = m->sections[m->count - 1];
3962 bfd_vma vaddr = m->sections[0]->vma;
3963 bfd_vma filesz = last->vma - vaddr + last->size;
3965 if (vaddr < info->relro_end
3966 && vaddr >= info->relro_start
3967 && (vaddr + filesz) >= info->relro_end)
3972 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
3975 amt = sizeof (struct elf_segment_map);
3976 m = bfd_zalloc (abfd, amt);
3980 m->p_type = PT_GNU_RELRO;
3982 m->p_flags_valid = 1;
3990 elf_tdata (abfd)->segment_map = mfirst;
3993 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
3996 for (count = 0, m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3998 elf_tdata (abfd)->program_header_size = count * bed->s->sizeof_phdr;
4003 if (sections != NULL)
4008 /* Sort sections by address. */
4011 elf_sort_sections (const void *arg1, const void *arg2)
4013 const asection *sec1 = *(const asection **) arg1;
4014 const asection *sec2 = *(const asection **) arg2;
4015 bfd_size_type size1, size2;
4017 /* Sort by LMA first, since this is the address used to
4018 place the section into a segment. */
4019 if (sec1->lma < sec2->lma)
4021 else if (sec1->lma > sec2->lma)
4024 /* Then sort by VMA. Normally the LMA and the VMA will be
4025 the same, and this will do nothing. */
4026 if (sec1->vma < sec2->vma)
4028 else if (sec1->vma > sec2->vma)
4031 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
4033 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
4039 /* If the indicies are the same, do not return 0
4040 here, but continue to try the next comparison. */
4041 if (sec1->target_index - sec2->target_index != 0)
4042 return sec1->target_index - sec2->target_index;
4047 else if (TOEND (sec2))
4052 /* Sort by size, to put zero sized sections
4053 before others at the same address. */
4055 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
4056 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
4063 return sec1->target_index - sec2->target_index;
4066 /* Ian Lance Taylor writes:
4068 We shouldn't be using % with a negative signed number. That's just
4069 not good. We have to make sure either that the number is not
4070 negative, or that the number has an unsigned type. When the types
4071 are all the same size they wind up as unsigned. When file_ptr is a
4072 larger signed type, the arithmetic winds up as signed long long,
4075 What we're trying to say here is something like ``increase OFF by
4076 the least amount that will cause it to be equal to the VMA modulo
4078 /* In other words, something like:
4080 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4081 off_offset = off % bed->maxpagesize;
4082 if (vma_offset < off_offset)
4083 adjustment = vma_offset + bed->maxpagesize - off_offset;
4085 adjustment = vma_offset - off_offset;
4087 which can can be collapsed into the expression below. */
4090 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4092 return ((vma - off) % maxpagesize);
4096 print_segment_map (const struct elf_segment_map *m)
4099 const char *pt = get_segment_type (m->p_type);
4104 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
4105 sprintf (buf, "LOPROC+%7.7x",
4106 (unsigned int) (m->p_type - PT_LOPROC));
4107 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
4108 sprintf (buf, "LOOS+%7.7x",
4109 (unsigned int) (m->p_type - PT_LOOS));
4111 snprintf (buf, sizeof (buf), "%8.8x",
4112 (unsigned int) m->p_type);
4115 fprintf (stderr, "%s:", pt);
4116 for (j = 0; j < m->count; j++)
4117 fprintf (stderr, " %s", m->sections [j]->name);
4121 /* Assign file positions to the sections based on the mapping from
4122 sections to segments. This function also sets up some fields in
4126 assign_file_positions_for_load_sections (bfd *abfd,
4127 struct bfd_link_info *link_info)
4129 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4130 struct elf_segment_map *m;
4131 Elf_Internal_Phdr *phdrs;
4132 Elf_Internal_Phdr *p;
4134 bfd_size_type maxpagesize;
4137 bfd_vma header_pad = 0;
4139 if (link_info == NULL
4140 && !_bfd_elf_map_sections_to_segments (abfd, link_info))
4144 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4148 header_pad = m->header_size;
4151 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4152 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4153 elf_elfheader (abfd)->e_phnum = alloc;
4155 if (elf_tdata (abfd)->program_header_size == (bfd_size_type) -1)
4156 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4158 BFD_ASSERT (elf_tdata (abfd)->program_header_size
4159 >= alloc * bed->s->sizeof_phdr);
4163 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4167 /* We're writing the size in elf_tdata (abfd)->program_header_size,
4168 see assign_file_positions_except_relocs, so make sure we have
4169 that amount allocated, with trailing space cleared.
4170 The variable alloc contains the computed need, while elf_tdata
4171 (abfd)->program_header_size contains the size used for the
4173 See ld/emultempl/elf-generic.em:gld${EMULATION_NAME}_map_segments
4174 where the layout is forced to according to a larger size in the
4175 last iterations for the testcase ld-elf/header. */
4176 BFD_ASSERT (elf_tdata (abfd)->program_header_size % bed->s->sizeof_phdr
4178 phdrs = bfd_zalloc2 (abfd,
4179 (elf_tdata (abfd)->program_header_size
4180 / bed->s->sizeof_phdr),
4181 sizeof (Elf_Internal_Phdr));
4182 elf_tdata (abfd)->phdr = phdrs;
4187 if ((abfd->flags & D_PAGED) != 0)
4188 maxpagesize = bed->maxpagesize;
4190 off = bed->s->sizeof_ehdr;
4191 off += alloc * bed->s->sizeof_phdr;
4192 if (header_pad < (bfd_vma) off)
4198 for (m = elf_tdata (abfd)->segment_map, p = phdrs, j = 0;
4200 m = m->next, p++, j++)
4204 bfd_boolean no_contents;
4206 /* If elf_segment_map is not from map_sections_to_segments, the
4207 sections may not be correctly ordered. NOTE: sorting should
4208 not be done to the PT_NOTE section of a corefile, which may
4209 contain several pseudo-sections artificially created by bfd.
4210 Sorting these pseudo-sections breaks things badly. */
4212 && !(elf_elfheader (abfd)->e_type == ET_CORE
4213 && m->p_type == PT_NOTE))
4214 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4217 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4218 number of sections with contents contributing to both p_filesz
4219 and p_memsz, followed by a number of sections with no contents
4220 that just contribute to p_memsz. In this loop, OFF tracks next
4221 available file offset for PT_LOAD and PT_NOTE segments. */
4222 p->p_type = m->p_type;
4223 p->p_flags = m->p_flags;
4228 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4230 if (m->p_paddr_valid)
4231 p->p_paddr = m->p_paddr;
4232 else if (m->count == 0)
4235 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
4237 if (p->p_type == PT_LOAD
4238 && (abfd->flags & D_PAGED) != 0)
4240 /* p_align in demand paged PT_LOAD segments effectively stores
4241 the maximum page size. When copying an executable with
4242 objcopy, we set m->p_align from the input file. Use this
4243 value for maxpagesize rather than bed->maxpagesize, which
4244 may be different. Note that we use maxpagesize for PT_TLS
4245 segment alignment later in this function, so we are relying
4246 on at least one PT_LOAD segment appearing before a PT_TLS
4248 if (m->p_align_valid)
4249 maxpagesize = m->p_align;
4251 p->p_align = maxpagesize;
4253 else if (m->p_align_valid)
4254 p->p_align = m->p_align;
4255 else if (m->count == 0)
4256 p->p_align = 1 << bed->s->log_file_align;
4260 no_contents = FALSE;
4262 if (p->p_type == PT_LOAD
4265 bfd_size_type align;
4266 unsigned int align_power = 0;
4268 if (m->p_align_valid)
4272 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4274 unsigned int secalign;
4276 secalign = bfd_get_section_alignment (abfd, *secpp);
4277 if (secalign > align_power)
4278 align_power = secalign;
4280 align = (bfd_size_type) 1 << align_power;
4281 if (align < maxpagesize)
4282 align = maxpagesize;
4285 for (i = 0; i < m->count; i++)
4286 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4287 /* If we aren't making room for this section, then
4288 it must be SHT_NOBITS regardless of what we've
4289 set via struct bfd_elf_special_section. */
4290 elf_section_type (m->sections[i]) = SHT_NOBITS;
4292 /* Find out whether this segment contains any loadable
4295 for (i = 0; i < m->count; i++)
4296 if (elf_section_type (m->sections[i]) != SHT_NOBITS)
4298 no_contents = FALSE;
4302 off_adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4306 /* We shouldn't need to align the segment on disk since
4307 the segment doesn't need file space, but the gABI
4308 arguably requires the alignment and glibc ld.so
4309 checks it. So to comply with the alignment
4310 requirement but not waste file space, we adjust
4311 p_offset for just this segment. (OFF_ADJUST is
4312 subtracted from OFF later.) This may put p_offset
4313 past the end of file, but that shouldn't matter. */
4318 /* Make sure the .dynamic section is the first section in the
4319 PT_DYNAMIC segment. */
4320 else if (p->p_type == PT_DYNAMIC
4322 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4325 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4327 bfd_set_error (bfd_error_bad_value);
4330 /* Set the note section type to SHT_NOTE. */
4331 else if (p->p_type == PT_NOTE)
4332 for (i = 0; i < m->count; i++)
4333 elf_section_type (m->sections[i]) = SHT_NOTE;
4339 if (m->includes_filehdr)
4341 if (!m->p_flags_valid)
4343 p->p_filesz = bed->s->sizeof_ehdr;
4344 p->p_memsz = bed->s->sizeof_ehdr;
4347 BFD_ASSERT (p->p_type == PT_LOAD);
4349 if (p->p_vaddr < (bfd_vma) off)
4351 (*_bfd_error_handler)
4352 (_("%B: Not enough room for program headers, try linking with -N"),
4354 bfd_set_error (bfd_error_bad_value);
4359 if (!m->p_paddr_valid)
4364 if (m->includes_phdrs)
4366 if (!m->p_flags_valid)
4369 if (!m->includes_filehdr)
4371 p->p_offset = bed->s->sizeof_ehdr;
4375 BFD_ASSERT (p->p_type == PT_LOAD);
4376 p->p_vaddr -= off - p->p_offset;
4377 if (!m->p_paddr_valid)
4378 p->p_paddr -= off - p->p_offset;
4382 p->p_filesz += alloc * bed->s->sizeof_phdr;
4383 p->p_memsz += alloc * bed->s->sizeof_phdr;
4386 p->p_filesz += header_pad;
4387 p->p_memsz += header_pad;
4391 if (p->p_type == PT_LOAD
4392 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4394 if (!m->includes_filehdr && !m->includes_phdrs)
4400 adjust = off - (p->p_offset + p->p_filesz);
4402 p->p_filesz += adjust;
4403 p->p_memsz += adjust;
4407 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4408 maps. Set filepos for sections in PT_LOAD segments, and in
4409 core files, for sections in PT_NOTE segments.
4410 assign_file_positions_for_non_load_sections will set filepos
4411 for other sections and update p_filesz for other segments. */
4412 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4415 bfd_size_type align;
4416 Elf_Internal_Shdr *this_hdr;
4419 this_hdr = &elf_section_data (sec)->this_hdr;
4420 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4422 if ((p->p_type == PT_LOAD
4423 || p->p_type == PT_TLS)
4424 && (this_hdr->sh_type != SHT_NOBITS
4425 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4426 && ((this_hdr->sh_flags & SHF_TLS) == 0
4427 || p->p_type == PT_TLS))))
4429 bfd_signed_vma adjust = sec->vma - (p->p_vaddr + p->p_memsz);
4433 (*_bfd_error_handler)
4434 (_("%B: section %A vma 0x%lx overlaps previous sections"),
4435 abfd, sec, (unsigned long) sec->vma);
4438 p->p_memsz += adjust;
4440 if (this_hdr->sh_type != SHT_NOBITS)
4443 p->p_filesz += adjust;
4447 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4449 /* The section at i == 0 is the one that actually contains
4453 this_hdr->sh_offset = sec->filepos = off;
4454 off += this_hdr->sh_size;
4455 p->p_filesz = this_hdr->sh_size;
4461 /* The rest are fake sections that shouldn't be written. */
4470 if (p->p_type == PT_LOAD)
4472 this_hdr->sh_offset = sec->filepos = off;
4473 if (this_hdr->sh_type != SHT_NOBITS)
4474 off += this_hdr->sh_size;
4477 if (this_hdr->sh_type != SHT_NOBITS)
4479 p->p_filesz += this_hdr->sh_size;
4480 /* A load section without SHF_ALLOC is something like
4481 a note section in a PT_NOTE segment. These take
4482 file space but are not loaded into memory. */
4483 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4484 p->p_memsz += this_hdr->sh_size;
4486 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4488 if (p->p_type == PT_TLS)
4489 p->p_memsz += this_hdr->sh_size;
4491 /* .tbss is special. It doesn't contribute to p_memsz of
4493 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
4494 p->p_memsz += this_hdr->sh_size;
4497 if (align > p->p_align
4498 && !m->p_align_valid
4499 && (p->p_type != PT_LOAD
4500 || (abfd->flags & D_PAGED) == 0))
4504 if (!m->p_flags_valid)
4507 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4509 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4515 /* Check that all sections are in a PT_LOAD segment.
4516 Don't check funky gdb generated core files. */
4517 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4518 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4520 Elf_Internal_Shdr *this_hdr;
4524 this_hdr = &(elf_section_data(sec)->this_hdr);
4525 if (this_hdr->sh_size != 0
4526 && !ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, p))
4528 (*_bfd_error_handler)
4529 (_("%B: section `%A' can't be allocated in segment %d"),
4531 print_segment_map (m);
4532 bfd_set_error (bfd_error_bad_value);
4538 elf_tdata (abfd)->next_file_pos = off;
4542 /* Assign file positions for the other sections. */
4545 assign_file_positions_for_non_load_sections (bfd *abfd,
4546 struct bfd_link_info *link_info)
4548 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4549 Elf_Internal_Shdr **i_shdrpp;
4550 Elf_Internal_Shdr **hdrpp;
4551 Elf_Internal_Phdr *phdrs;
4552 Elf_Internal_Phdr *p;
4553 struct elf_segment_map *m;
4554 bfd_vma filehdr_vaddr, filehdr_paddr;
4555 bfd_vma phdrs_vaddr, phdrs_paddr;
4557 unsigned int num_sec;
4561 i_shdrpp = elf_elfsections (abfd);
4562 num_sec = elf_numsections (abfd);
4563 off = elf_tdata (abfd)->next_file_pos;
4564 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4566 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4567 Elf_Internal_Shdr *hdr;
4570 if (hdr->bfd_section != NULL
4571 && (hdr->bfd_section->filepos != 0
4572 || (hdr->sh_type == SHT_NOBITS
4573 && hdr->contents == NULL)))
4574 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
4575 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4577 if (hdr->sh_size != 0)
4578 ((*_bfd_error_handler)
4579 (_("%B: warning: allocated section `%s' not in segment"),
4581 (hdr->bfd_section == NULL
4583 : hdr->bfd_section->name)));
4584 /* We don't need to page align empty sections. */
4585 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
4586 off += vma_page_aligned_bias (hdr->sh_addr, off,
4589 off += vma_page_aligned_bias (hdr->sh_addr, off,
4591 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4594 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4595 && hdr->bfd_section == NULL)
4596 || hdr == i_shdrpp[tdata->symtab_section]
4597 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4598 || hdr == i_shdrpp[tdata->strtab_section])
4599 hdr->sh_offset = -1;
4601 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4604 /* Now that we have set the section file positions, we can set up
4605 the file positions for the non PT_LOAD segments. */
4609 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4611 phdrs = elf_tdata (abfd)->phdr;
4612 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4617 if (p->p_type != PT_LOAD)
4620 if (m->includes_filehdr)
4622 filehdr_vaddr = p->p_vaddr;
4623 filehdr_paddr = p->p_paddr;
4625 if (m->includes_phdrs)
4627 phdrs_vaddr = p->p_vaddr;
4628 phdrs_paddr = p->p_paddr;
4629 if (m->includes_filehdr)
4631 phdrs_vaddr += bed->s->sizeof_ehdr;
4632 phdrs_paddr += bed->s->sizeof_ehdr;
4637 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4641 if (p->p_type == PT_GNU_RELRO)
4643 const Elf_Internal_Phdr *lp;
4645 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4647 if (link_info != NULL)
4649 /* During linking the range of the RELRO segment is passed
4651 for (lp = phdrs; lp < phdrs + count; ++lp)
4653 if (lp->p_type == PT_LOAD
4654 && lp->p_vaddr >= link_info->relro_start
4655 && lp->p_vaddr < link_info->relro_end
4656 && lp->p_vaddr + lp->p_filesz >= link_info->relro_end)
4662 /* Otherwise we are copying an executable or shared
4663 library, but we need to use the same linker logic. */
4664 for (lp = phdrs; lp < phdrs + count; ++lp)
4666 if (lp->p_type == PT_LOAD
4667 && lp->p_paddr == p->p_paddr)
4672 if (lp < phdrs + count)
4674 p->p_vaddr = lp->p_vaddr;
4675 p->p_paddr = lp->p_paddr;
4676 p->p_offset = lp->p_offset;
4677 if (link_info != NULL)
4678 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4679 else if (m->p_size_valid)
4680 p->p_filesz = m->p_size;
4683 p->p_memsz = p->p_filesz;
4685 p->p_flags = (lp->p_flags & ~PF_W);
4689 memset (p, 0, sizeof *p);
4690 p->p_type = PT_NULL;
4693 else if (m->count != 0)
4695 if (p->p_type != PT_LOAD
4696 && (p->p_type != PT_NOTE
4697 || bfd_get_format (abfd) != bfd_core))
4699 Elf_Internal_Shdr *hdr;
4702 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4704 sect = m->sections[m->count - 1];
4705 hdr = &elf_section_data (sect)->this_hdr;
4706 p->p_filesz = sect->filepos - m->sections[0]->filepos;
4707 if (hdr->sh_type != SHT_NOBITS)
4708 p->p_filesz += hdr->sh_size;
4709 p->p_offset = m->sections[0]->filepos;
4712 else if (m->includes_filehdr)
4714 p->p_vaddr = filehdr_vaddr;
4715 if (! m->p_paddr_valid)
4716 p->p_paddr = filehdr_paddr;
4718 else if (m->includes_phdrs)
4720 p->p_vaddr = phdrs_vaddr;
4721 if (! m->p_paddr_valid)
4722 p->p_paddr = phdrs_paddr;
4726 elf_tdata (abfd)->next_file_pos = off;
4731 /* Work out the file positions of all the sections. This is called by
4732 _bfd_elf_compute_section_file_positions. All the section sizes and
4733 VMAs must be known before this is called.
4735 Reloc sections come in two flavours: Those processed specially as
4736 "side-channel" data attached to a section to which they apply, and
4737 those that bfd doesn't process as relocations. The latter sort are
4738 stored in a normal bfd section by bfd_section_from_shdr. We don't
4739 consider the former sort here, unless they form part of the loadable
4740 image. Reloc sections not assigned here will be handled later by
4741 assign_file_positions_for_relocs.
4743 We also don't set the positions of the .symtab and .strtab here. */
4746 assign_file_positions_except_relocs (bfd *abfd,
4747 struct bfd_link_info *link_info)
4749 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4750 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4752 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4754 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4755 && bfd_get_format (abfd) != bfd_core)
4757 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4758 unsigned int num_sec = elf_numsections (abfd);
4759 Elf_Internal_Shdr **hdrpp;
4762 /* Start after the ELF header. */
4763 off = i_ehdrp->e_ehsize;
4765 /* We are not creating an executable, which means that we are
4766 not creating a program header, and that the actual order of
4767 the sections in the file is unimportant. */
4768 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4770 Elf_Internal_Shdr *hdr;
4773 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4774 && hdr->bfd_section == NULL)
4775 || i == tdata->symtab_section
4776 || i == tdata->symtab_shndx_section
4777 || i == tdata->strtab_section)
4779 hdr->sh_offset = -1;
4782 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4789 /* Assign file positions for the loaded sections based on the
4790 assignment of sections to segments. */
4791 if (!assign_file_positions_for_load_sections (abfd, link_info))
4794 /* And for non-load sections. */
4795 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
4798 if (bed->elf_backend_modify_program_headers != NULL)
4800 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
4804 /* Write out the program headers. */
4805 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
4806 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4807 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
4810 off = tdata->next_file_pos;
4813 /* Place the section headers. */
4814 off = align_file_position (off, 1 << bed->s->log_file_align);
4815 i_ehdrp->e_shoff = off;
4816 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4818 tdata->next_file_pos = off;
4824 prep_headers (bfd *abfd)
4826 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4827 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4828 struct elf_strtab_hash *shstrtab;
4829 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4831 i_ehdrp = elf_elfheader (abfd);
4833 shstrtab = _bfd_elf_strtab_init ();
4834 if (shstrtab == NULL)
4837 elf_shstrtab (abfd) = shstrtab;
4839 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4840 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4841 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4842 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4844 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4845 i_ehdrp->e_ident[EI_DATA] =
4846 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4847 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4849 if ((abfd->flags & DYNAMIC) != 0)
4850 i_ehdrp->e_type = ET_DYN;
4851 else if ((abfd->flags & EXEC_P) != 0)
4852 i_ehdrp->e_type = ET_EXEC;
4853 else if (bfd_get_format (abfd) == bfd_core)
4854 i_ehdrp->e_type = ET_CORE;
4856 i_ehdrp->e_type = ET_REL;
4858 switch (bfd_get_arch (abfd))
4860 case bfd_arch_unknown:
4861 i_ehdrp->e_machine = EM_NONE;
4864 /* There used to be a long list of cases here, each one setting
4865 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4866 in the corresponding bfd definition. To avoid duplication,
4867 the switch was removed. Machines that need special handling
4868 can generally do it in elf_backend_final_write_processing(),
4869 unless they need the information earlier than the final write.
4870 Such need can generally be supplied by replacing the tests for
4871 e_machine with the conditions used to determine it. */
4873 i_ehdrp->e_machine = bed->elf_machine_code;
4876 i_ehdrp->e_version = bed->s->ev_current;
4877 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4879 /* No program header, for now. */
4880 i_ehdrp->e_phoff = 0;
4881 i_ehdrp->e_phentsize = 0;
4882 i_ehdrp->e_phnum = 0;
4884 /* Each bfd section is section header entry. */
4885 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4886 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4888 /* If we're building an executable, we'll need a program header table. */
4889 if (abfd->flags & EXEC_P)
4890 /* It all happens later. */
4894 i_ehdrp->e_phentsize = 0;
4896 i_ehdrp->e_phoff = 0;
4899 elf_tdata (abfd)->symtab_hdr.sh_name =
4900 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4901 elf_tdata (abfd)->strtab_hdr.sh_name =
4902 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4903 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4904 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4905 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4906 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4907 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4913 /* Assign file positions for all the reloc sections which are not part
4914 of the loadable file image. */
4917 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4920 unsigned int i, num_sec;
4921 Elf_Internal_Shdr **shdrpp;
4923 off = elf_tdata (abfd)->next_file_pos;
4925 num_sec = elf_numsections (abfd);
4926 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4928 Elf_Internal_Shdr *shdrp;
4931 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4932 && shdrp->sh_offset == -1)
4933 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4936 elf_tdata (abfd)->next_file_pos = off;
4940 _bfd_elf_write_object_contents (bfd *abfd)
4942 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4943 Elf_Internal_Ehdr *i_ehdrp;
4944 Elf_Internal_Shdr **i_shdrp;
4946 unsigned int count, num_sec;
4948 if (! abfd->output_has_begun
4949 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4952 i_shdrp = elf_elfsections (abfd);
4953 i_ehdrp = elf_elfheader (abfd);
4956 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4960 _bfd_elf_assign_file_positions_for_relocs (abfd);
4962 /* After writing the headers, we need to write the sections too... */
4963 num_sec = elf_numsections (abfd);
4964 for (count = 1; count < num_sec; count++)
4966 if (bed->elf_backend_section_processing)
4967 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4968 if (i_shdrp[count]->contents)
4970 bfd_size_type amt = i_shdrp[count]->sh_size;
4972 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4973 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4978 /* Write out the section header names. */
4979 if (elf_shstrtab (abfd) != NULL
4980 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4981 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
4984 if (bed->elf_backend_final_write_processing)
4985 (*bed->elf_backend_final_write_processing) (abfd,
4986 elf_tdata (abfd)->linker);
4988 if (!bed->s->write_shdrs_and_ehdr (abfd))
4991 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
4992 if (elf_tdata (abfd)->after_write_object_contents)
4993 return (*elf_tdata (abfd)->after_write_object_contents) (abfd);
4999 _bfd_elf_write_corefile_contents (bfd *abfd)
5001 /* Hopefully this can be done just like an object file. */
5002 return _bfd_elf_write_object_contents (abfd);
5005 /* Given a section, search the header to find them. */
5008 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
5010 const struct elf_backend_data *bed;
5013 if (elf_section_data (asect) != NULL
5014 && elf_section_data (asect)->this_idx != 0)
5015 return elf_section_data (asect)->this_idx;
5017 if (bfd_is_abs_section (asect))
5019 else if (bfd_is_com_section (asect))
5021 else if (bfd_is_und_section (asect))
5026 bed = get_elf_backend_data (abfd);
5027 if (bed->elf_backend_section_from_bfd_section)
5031 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
5035 if (index == SHN_BAD)
5036 bfd_set_error (bfd_error_nonrepresentable_section);
5041 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5045 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5047 asymbol *asym_ptr = *asym_ptr_ptr;
5049 flagword flags = asym_ptr->flags;
5051 /* When gas creates relocations against local labels, it creates its
5052 own symbol for the section, but does put the symbol into the
5053 symbol chain, so udata is 0. When the linker is generating
5054 relocatable output, this section symbol may be for one of the
5055 input sections rather than the output section. */
5056 if (asym_ptr->udata.i == 0
5057 && (flags & BSF_SECTION_SYM)
5058 && asym_ptr->section)
5063 sec = asym_ptr->section;
5064 if (sec->owner != abfd && sec->output_section != NULL)
5065 sec = sec->output_section;
5066 if (sec->owner == abfd
5067 && (indx = sec->index) < elf_num_section_syms (abfd)
5068 && elf_section_syms (abfd)[indx] != NULL)
5069 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5072 idx = asym_ptr->udata.i;
5076 /* This case can occur when using --strip-symbol on a symbol
5077 which is used in a relocation entry. */
5078 (*_bfd_error_handler)
5079 (_("%B: symbol `%s' required but not present"),
5080 abfd, bfd_asymbol_name (asym_ptr));
5081 bfd_set_error (bfd_error_no_symbols);
5088 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5089 (long) asym_ptr, asym_ptr->name, idx, flags,
5090 elf_symbol_flags (flags));
5098 /* Rewrite program header information. */
5101 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
5103 Elf_Internal_Ehdr *iehdr;
5104 struct elf_segment_map *map;
5105 struct elf_segment_map *map_first;
5106 struct elf_segment_map **pointer_to_map;
5107 Elf_Internal_Phdr *segment;
5110 unsigned int num_segments;
5111 bfd_boolean phdr_included = FALSE;
5112 bfd_boolean p_paddr_valid;
5113 bfd_vma maxpagesize;
5114 struct elf_segment_map *phdr_adjust_seg = NULL;
5115 unsigned int phdr_adjust_num = 0;
5116 const struct elf_backend_data *bed;
5118 bed = get_elf_backend_data (ibfd);
5119 iehdr = elf_elfheader (ibfd);
5122 pointer_to_map = &map_first;
5124 num_segments = elf_elfheader (ibfd)->e_phnum;
5125 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5127 /* Returns the end address of the segment + 1. */
5128 #define SEGMENT_END(segment, start) \
5129 (start + (segment->p_memsz > segment->p_filesz \
5130 ? segment->p_memsz : segment->p_filesz))
5132 #define SECTION_SIZE(section, segment) \
5133 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5134 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5135 ? section->size : 0)
5137 /* Returns TRUE if the given section is contained within
5138 the given segment. VMA addresses are compared. */
5139 #define IS_CONTAINED_BY_VMA(section, segment) \
5140 (section->vma >= segment->p_vaddr \
5141 && (section->vma + SECTION_SIZE (section, segment) \
5142 <= (SEGMENT_END (segment, segment->p_vaddr))))
5144 /* Returns TRUE if the given section is contained within
5145 the given segment. LMA addresses are compared. */
5146 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5147 (section->lma >= base \
5148 && (section->lma + SECTION_SIZE (section, segment) \
5149 <= SEGMENT_END (segment, base)))
5151 /* Handle PT_NOTE segment. */
5152 #define IS_NOTE(p, s) \
5153 (p->p_type == PT_NOTE \
5154 && elf_section_type (s) == SHT_NOTE \
5155 && (bfd_vma) s->filepos >= p->p_offset \
5156 && ((bfd_vma) s->filepos + s->size \
5157 <= p->p_offset + p->p_filesz))
5159 /* Special case: corefile "NOTE" section containing regs, prpsinfo
5161 #define IS_COREFILE_NOTE(p, s) \
5163 && bfd_get_format (ibfd) == bfd_core \
5167 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5168 linker, which generates a PT_INTERP section with p_vaddr and
5169 p_memsz set to 0. */
5170 #define IS_SOLARIS_PT_INTERP(p, s) \
5172 && p->p_paddr == 0 \
5173 && p->p_memsz == 0 \
5174 && p->p_filesz > 0 \
5175 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5177 && (bfd_vma) s->filepos >= p->p_offset \
5178 && ((bfd_vma) s->filepos + s->size \
5179 <= p->p_offset + p->p_filesz))
5181 /* Decide if the given section should be included in the given segment.
5182 A section will be included if:
5183 1. It is within the address space of the segment -- we use the LMA
5184 if that is set for the segment and the VMA otherwise,
5185 2. It is an allocated section or a NOTE section in a PT_NOTE
5187 3. There is an output section associated with it,
5188 4. The section has not already been allocated to a previous segment.
5189 5. PT_GNU_STACK segments do not include any sections.
5190 6. PT_TLS segment includes only SHF_TLS sections.
5191 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5192 8. PT_DYNAMIC should not contain empty sections at the beginning
5193 (with the possible exception of .dynamic). */
5194 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5195 ((((segment->p_paddr \
5196 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5197 : IS_CONTAINED_BY_VMA (section, segment)) \
5198 && (section->flags & SEC_ALLOC) != 0) \
5199 || IS_NOTE (segment, section)) \
5200 && segment->p_type != PT_GNU_STACK \
5201 && (segment->p_type != PT_TLS \
5202 || (section->flags & SEC_THREAD_LOCAL)) \
5203 && (segment->p_type == PT_LOAD \
5204 || segment->p_type == PT_TLS \
5205 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5206 && (segment->p_type != PT_DYNAMIC \
5207 || SECTION_SIZE (section, segment) > 0 \
5208 || (segment->p_paddr \
5209 ? segment->p_paddr != section->lma \
5210 : segment->p_vaddr != section->vma) \
5211 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5213 && !section->segment_mark)
5215 /* If the output section of a section in the input segment is NULL,
5216 it is removed from the corresponding output segment. */
5217 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5218 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5219 && section->output_section != NULL)
5221 /* Returns TRUE iff seg1 starts after the end of seg2. */
5222 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5223 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5225 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5226 their VMA address ranges and their LMA address ranges overlap.
5227 It is possible to have overlapping VMA ranges without overlapping LMA
5228 ranges. RedBoot images for example can have both .data and .bss mapped
5229 to the same VMA range, but with the .data section mapped to a different
5231 #define SEGMENT_OVERLAPS(seg1, seg2) \
5232 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5233 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5234 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5235 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5237 /* Initialise the segment mark field. */
5238 for (section = ibfd->sections; section != NULL; section = section->next)
5239 section->segment_mark = FALSE;
5241 /* The Solaris linker creates program headers in which all the
5242 p_paddr fields are zero. When we try to objcopy or strip such a
5243 file, we get confused. Check for this case, and if we find it
5244 don't set the p_paddr_valid fields. */
5245 p_paddr_valid = FALSE;
5246 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5249 if (segment->p_paddr != 0)
5251 p_paddr_valid = TRUE;
5255 /* Scan through the segments specified in the program header
5256 of the input BFD. For this first scan we look for overlaps
5257 in the loadable segments. These can be created by weird
5258 parameters to objcopy. Also, fix some solaris weirdness. */
5259 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5264 Elf_Internal_Phdr *segment2;
5266 if (segment->p_type == PT_INTERP)
5267 for (section = ibfd->sections; section; section = section->next)
5268 if (IS_SOLARIS_PT_INTERP (segment, section))
5270 /* Mininal change so that the normal section to segment
5271 assignment code will work. */
5272 segment->p_vaddr = section->vma;
5276 if (segment->p_type != PT_LOAD)
5278 /* Remove PT_GNU_RELRO segment. */
5279 if (segment->p_type == PT_GNU_RELRO)
5280 segment->p_type = PT_NULL;
5284 /* Determine if this segment overlaps any previous segments. */
5285 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++)
5287 bfd_signed_vma extra_length;
5289 if (segment2->p_type != PT_LOAD
5290 || !SEGMENT_OVERLAPS (segment, segment2))
5293 /* Merge the two segments together. */
5294 if (segment2->p_vaddr < segment->p_vaddr)
5296 /* Extend SEGMENT2 to include SEGMENT and then delete
5298 extra_length = (SEGMENT_END (segment, segment->p_vaddr)
5299 - SEGMENT_END (segment2, segment2->p_vaddr));
5301 if (extra_length > 0)
5303 segment2->p_memsz += extra_length;
5304 segment2->p_filesz += extra_length;
5307 segment->p_type = PT_NULL;
5309 /* Since we have deleted P we must restart the outer loop. */
5311 segment = elf_tdata (ibfd)->phdr;
5316 /* Extend SEGMENT to include SEGMENT2 and then delete
5318 extra_length = (SEGMENT_END (segment2, segment2->p_vaddr)
5319 - SEGMENT_END (segment, segment->p_vaddr));
5321 if (extra_length > 0)
5323 segment->p_memsz += extra_length;
5324 segment->p_filesz += extra_length;
5327 segment2->p_type = PT_NULL;
5332 /* The second scan attempts to assign sections to segments. */
5333 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5337 unsigned int section_count;
5338 asection **sections;
5339 asection *output_section;
5341 bfd_vma matching_lma;
5342 bfd_vma suggested_lma;
5345 asection *first_section;
5346 bfd_boolean first_matching_lma;
5347 bfd_boolean first_suggested_lma;
5349 if (segment->p_type == PT_NULL)
5352 first_section = NULL;
5353 /* Compute how many sections might be placed into this segment. */
5354 for (section = ibfd->sections, section_count = 0;
5356 section = section->next)
5358 /* Find the first section in the input segment, which may be
5359 removed from the corresponding output segment. */
5360 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5362 if (first_section == NULL)
5363 first_section = section;
5364 if (section->output_section != NULL)
5369 /* Allocate a segment map big enough to contain
5370 all of the sections we have selected. */
5371 amt = sizeof (struct elf_segment_map);
5372 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5373 map = bfd_zalloc (obfd, amt);
5377 /* Initialise the fields of the segment map. Default to
5378 using the physical address of the segment in the input BFD. */
5380 map->p_type = segment->p_type;
5381 map->p_flags = segment->p_flags;
5382 map->p_flags_valid = 1;
5384 /* If the first section in the input segment is removed, there is
5385 no need to preserve segment physical address in the corresponding
5387 if (!first_section || first_section->output_section != NULL)
5389 map->p_paddr = segment->p_paddr;
5390 map->p_paddr_valid = p_paddr_valid;
5393 /* Determine if this segment contains the ELF file header
5394 and if it contains the program headers themselves. */
5395 map->includes_filehdr = (segment->p_offset == 0
5396 && segment->p_filesz >= iehdr->e_ehsize);
5397 map->includes_phdrs = 0;
5399 if (!phdr_included || segment->p_type != PT_LOAD)
5401 map->includes_phdrs =
5402 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5403 && (segment->p_offset + segment->p_filesz
5404 >= ((bfd_vma) iehdr->e_phoff
5405 + iehdr->e_phnum * iehdr->e_phentsize)));
5407 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5408 phdr_included = TRUE;
5411 if (section_count == 0)
5413 /* Special segments, such as the PT_PHDR segment, may contain
5414 no sections, but ordinary, loadable segments should contain
5415 something. They are allowed by the ELF spec however, so only
5416 a warning is produced. */
5417 if (segment->p_type == PT_LOAD)
5418 (*_bfd_error_handler) (_("%B: warning: Empty loadable segment"
5419 " detected, is this intentional ?\n"),
5423 *pointer_to_map = map;
5424 pointer_to_map = &map->next;
5429 /* Now scan the sections in the input BFD again and attempt
5430 to add their corresponding output sections to the segment map.
5431 The problem here is how to handle an output section which has
5432 been moved (ie had its LMA changed). There are four possibilities:
5434 1. None of the sections have been moved.
5435 In this case we can continue to use the segment LMA from the
5438 2. All of the sections have been moved by the same amount.
5439 In this case we can change the segment's LMA to match the LMA
5440 of the first section.
5442 3. Some of the sections have been moved, others have not.
5443 In this case those sections which have not been moved can be
5444 placed in the current segment which will have to have its size,
5445 and possibly its LMA changed, and a new segment or segments will
5446 have to be created to contain the other sections.
5448 4. The sections have been moved, but not by the same amount.
5449 In this case we can change the segment's LMA to match the LMA
5450 of the first section and we will have to create a new segment
5451 or segments to contain the other sections.
5453 In order to save time, we allocate an array to hold the section
5454 pointers that we are interested in. As these sections get assigned
5455 to a segment, they are removed from this array. */
5457 sections = bfd_malloc2 (section_count, sizeof (asection *));
5458 if (sections == NULL)
5461 /* Step One: Scan for segment vs section LMA conflicts.
5462 Also add the sections to the section array allocated above.
5463 Also add the sections to the current segment. In the common
5464 case, where the sections have not been moved, this means that
5465 we have completely filled the segment, and there is nothing
5470 first_matching_lma = TRUE;
5471 first_suggested_lma = TRUE;
5473 for (section = ibfd->sections;
5475 section = section->next)
5476 if (section == first_section)
5479 for (j = 0; section != NULL; section = section->next)
5481 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5483 output_section = section->output_section;
5485 sections[j++] = section;
5487 /* The Solaris native linker always sets p_paddr to 0.
5488 We try to catch that case here, and set it to the
5489 correct value. Note - some backends require that
5490 p_paddr be left as zero. */
5492 && segment->p_vaddr != 0
5493 && !bed->want_p_paddr_set_to_zero
5495 && output_section->lma != 0
5496 && output_section->vma == (segment->p_vaddr
5497 + (map->includes_filehdr
5500 + (map->includes_phdrs
5502 * iehdr->e_phentsize)
5504 map->p_paddr = segment->p_vaddr;
5506 /* Match up the physical address of the segment with the
5507 LMA address of the output section. */
5508 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5509 || IS_COREFILE_NOTE (segment, section)
5510 || (bed->want_p_paddr_set_to_zero
5511 && IS_CONTAINED_BY_VMA (output_section, segment)))
5513 if (first_matching_lma || output_section->lma < matching_lma)
5515 matching_lma = output_section->lma;
5516 first_matching_lma = FALSE;
5519 /* We assume that if the section fits within the segment
5520 then it does not overlap any other section within that
5522 map->sections[isec++] = output_section;
5524 else if (first_suggested_lma)
5526 suggested_lma = output_section->lma;
5527 first_suggested_lma = FALSE;
5530 if (j == section_count)
5535 BFD_ASSERT (j == section_count);
5537 /* Step Two: Adjust the physical address of the current segment,
5539 if (isec == section_count)
5541 /* All of the sections fitted within the segment as currently
5542 specified. This is the default case. Add the segment to
5543 the list of built segments and carry on to process the next
5544 program header in the input BFD. */
5545 map->count = section_count;
5546 *pointer_to_map = map;
5547 pointer_to_map = &map->next;
5550 && !bed->want_p_paddr_set_to_zero
5551 && matching_lma != map->p_paddr
5552 && !map->includes_filehdr
5553 && !map->includes_phdrs)
5554 /* There is some padding before the first section in the
5555 segment. So, we must account for that in the output
5557 map->p_vaddr_offset = matching_lma - map->p_paddr;
5564 if (!first_matching_lma)
5566 /* At least one section fits inside the current segment.
5567 Keep it, but modify its physical address to match the
5568 LMA of the first section that fitted. */
5569 map->p_paddr = matching_lma;
5573 /* None of the sections fitted inside the current segment.
5574 Change the current segment's physical address to match
5575 the LMA of the first section. */
5576 map->p_paddr = suggested_lma;
5579 /* Offset the segment physical address from the lma
5580 to allow for space taken up by elf headers. */
5581 if (map->includes_filehdr)
5583 if (map->p_paddr >= iehdr->e_ehsize)
5584 map->p_paddr -= iehdr->e_ehsize;
5587 map->includes_filehdr = FALSE;
5588 map->includes_phdrs = FALSE;
5592 if (map->includes_phdrs)
5594 if (map->p_paddr >= iehdr->e_phnum * iehdr->e_phentsize)
5596 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5598 /* iehdr->e_phnum is just an estimate of the number
5599 of program headers that we will need. Make a note
5600 here of the number we used and the segment we chose
5601 to hold these headers, so that we can adjust the
5602 offset when we know the correct value. */
5603 phdr_adjust_num = iehdr->e_phnum;
5604 phdr_adjust_seg = map;
5607 map->includes_phdrs = FALSE;
5611 /* Step Three: Loop over the sections again, this time assigning
5612 those that fit to the current segment and removing them from the
5613 sections array; but making sure not to leave large gaps. Once all
5614 possible sections have been assigned to the current segment it is
5615 added to the list of built segments and if sections still remain
5616 to be assigned, a new segment is constructed before repeating
5623 first_suggested_lma = TRUE;
5625 /* Fill the current segment with sections that fit. */
5626 for (j = 0; j < section_count; j++)
5628 section = sections[j];
5630 if (section == NULL)
5633 output_section = section->output_section;
5635 BFD_ASSERT (output_section != NULL);
5637 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5638 || IS_COREFILE_NOTE (segment, section))
5640 if (map->count == 0)
5642 /* If the first section in a segment does not start at
5643 the beginning of the segment, then something is
5645 if (output_section->lma
5647 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5648 + (map->includes_phdrs
5649 ? iehdr->e_phnum * iehdr->e_phentsize
5657 prev_sec = map->sections[map->count - 1];
5659 /* If the gap between the end of the previous section
5660 and the start of this section is more than
5661 maxpagesize then we need to start a new segment. */
5662 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5664 < BFD_ALIGN (output_section->lma, maxpagesize))
5665 || (prev_sec->lma + prev_sec->size
5666 > output_section->lma))
5668 if (first_suggested_lma)
5670 suggested_lma = output_section->lma;
5671 first_suggested_lma = FALSE;
5678 map->sections[map->count++] = output_section;
5681 section->segment_mark = TRUE;
5683 else if (first_suggested_lma)
5685 suggested_lma = output_section->lma;
5686 first_suggested_lma = FALSE;
5690 BFD_ASSERT (map->count > 0);
5692 /* Add the current segment to the list of built segments. */
5693 *pointer_to_map = map;
5694 pointer_to_map = &map->next;
5696 if (isec < section_count)
5698 /* We still have not allocated all of the sections to
5699 segments. Create a new segment here, initialise it
5700 and carry on looping. */
5701 amt = sizeof (struct elf_segment_map);
5702 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5703 map = bfd_alloc (obfd, amt);
5710 /* Initialise the fields of the segment map. Set the physical
5711 physical address to the LMA of the first section that has
5712 not yet been assigned. */
5714 map->p_type = segment->p_type;
5715 map->p_flags = segment->p_flags;
5716 map->p_flags_valid = 1;
5717 map->p_paddr = suggested_lma;
5718 map->p_paddr_valid = p_paddr_valid;
5719 map->includes_filehdr = 0;
5720 map->includes_phdrs = 0;
5723 while (isec < section_count);
5728 elf_tdata (obfd)->segment_map = map_first;
5730 /* If we had to estimate the number of program headers that were
5731 going to be needed, then check our estimate now and adjust
5732 the offset if necessary. */
5733 if (phdr_adjust_seg != NULL)
5737 for (count = 0, map = map_first; map != NULL; map = map->next)
5740 if (count > phdr_adjust_num)
5741 phdr_adjust_seg->p_paddr
5742 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5747 #undef IS_CONTAINED_BY_VMA
5748 #undef IS_CONTAINED_BY_LMA
5750 #undef IS_COREFILE_NOTE
5751 #undef IS_SOLARIS_PT_INTERP
5752 #undef IS_SECTION_IN_INPUT_SEGMENT
5753 #undef INCLUDE_SECTION_IN_SEGMENT
5754 #undef SEGMENT_AFTER_SEGMENT
5755 #undef SEGMENT_OVERLAPS
5759 /* Copy ELF program header information. */
5762 copy_elf_program_header (bfd *ibfd, bfd *obfd)
5764 Elf_Internal_Ehdr *iehdr;
5765 struct elf_segment_map *map;
5766 struct elf_segment_map *map_first;
5767 struct elf_segment_map **pointer_to_map;
5768 Elf_Internal_Phdr *segment;
5770 unsigned int num_segments;
5771 bfd_boolean phdr_included = FALSE;
5772 bfd_boolean p_paddr_valid;
5774 iehdr = elf_elfheader (ibfd);
5777 pointer_to_map = &map_first;
5779 /* If all the segment p_paddr fields are zero, don't set
5780 map->p_paddr_valid. */
5781 p_paddr_valid = FALSE;
5782 num_segments = elf_elfheader (ibfd)->e_phnum;
5783 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5786 if (segment->p_paddr != 0)
5788 p_paddr_valid = TRUE;
5792 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5797 unsigned int section_count;
5799 Elf_Internal_Shdr *this_hdr;
5800 asection *first_section = NULL;
5801 asection *lowest_section = NULL;
5803 /* Compute how many sections are in this segment. */
5804 for (section = ibfd->sections, section_count = 0;
5806 section = section->next)
5808 this_hdr = &(elf_section_data(section)->this_hdr);
5809 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5812 first_section = lowest_section = section;
5813 if (section->lma < lowest_section->lma)
5814 lowest_section = section;
5819 /* Allocate a segment map big enough to contain
5820 all of the sections we have selected. */
5821 amt = sizeof (struct elf_segment_map);
5822 if (section_count != 0)
5823 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5824 map = bfd_zalloc (obfd, amt);
5828 /* Initialize the fields of the output segment map with the
5831 map->p_type = segment->p_type;
5832 map->p_flags = segment->p_flags;
5833 map->p_flags_valid = 1;
5834 map->p_paddr = segment->p_paddr;
5835 map->p_paddr_valid = p_paddr_valid;
5836 map->p_align = segment->p_align;
5837 map->p_align_valid = 1;
5838 map->p_vaddr_offset = 0;
5840 if (map->p_type == PT_GNU_RELRO)
5842 /* The PT_GNU_RELRO segment may contain the first a few
5843 bytes in the .got.plt section even if the whole .got.plt
5844 section isn't in the PT_GNU_RELRO segment. We won't
5845 change the size of the PT_GNU_RELRO segment. */
5846 map->p_size = segment->p_memsz;
5847 map->p_size_valid = 1;
5850 /* Determine if this segment contains the ELF file header
5851 and if it contains the program headers themselves. */
5852 map->includes_filehdr = (segment->p_offset == 0
5853 && segment->p_filesz >= iehdr->e_ehsize);
5855 map->includes_phdrs = 0;
5856 if (! phdr_included || segment->p_type != PT_LOAD)
5858 map->includes_phdrs =
5859 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5860 && (segment->p_offset + segment->p_filesz
5861 >= ((bfd_vma) iehdr->e_phoff
5862 + iehdr->e_phnum * iehdr->e_phentsize)));
5864 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5865 phdr_included = TRUE;
5868 if (map->includes_filehdr && first_section)
5869 /* We need to keep the space used by the headers fixed. */
5870 map->header_size = first_section->vma - segment->p_vaddr;
5872 if (!map->includes_phdrs
5873 && !map->includes_filehdr
5874 && map->p_paddr_valid)
5875 /* There is some other padding before the first section. */
5876 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
5877 - segment->p_paddr);
5879 if (section_count != 0)
5881 unsigned int isec = 0;
5883 for (section = first_section;
5885 section = section->next)
5887 this_hdr = &(elf_section_data(section)->this_hdr);
5888 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5890 map->sections[isec++] = section->output_section;
5891 if (isec == section_count)
5897 map->count = section_count;
5898 *pointer_to_map = map;
5899 pointer_to_map = &map->next;
5902 elf_tdata (obfd)->segment_map = map_first;
5906 /* Copy private BFD data. This copies or rewrites ELF program header
5910 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5912 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5913 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5916 if (elf_tdata (ibfd)->phdr == NULL)
5919 if (ibfd->xvec == obfd->xvec)
5921 /* Check to see if any sections in the input BFD
5922 covered by ELF program header have changed. */
5923 Elf_Internal_Phdr *segment;
5924 asection *section, *osec;
5925 unsigned int i, num_segments;
5926 Elf_Internal_Shdr *this_hdr;
5927 const struct elf_backend_data *bed;
5929 bed = get_elf_backend_data (ibfd);
5931 /* Regenerate the segment map if p_paddr is set to 0. */
5932 if (bed->want_p_paddr_set_to_zero)
5935 /* Initialize the segment mark field. */
5936 for (section = obfd->sections; section != NULL;
5937 section = section->next)
5938 section->segment_mark = FALSE;
5940 num_segments = elf_elfheader (ibfd)->e_phnum;
5941 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5945 /* PR binutils/3535. The Solaris linker always sets the p_paddr
5946 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
5947 which severly confuses things, so always regenerate the segment
5948 map in this case. */
5949 if (segment->p_paddr == 0
5950 && segment->p_memsz == 0
5951 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
5954 for (section = ibfd->sections;
5955 section != NULL; section = section->next)
5957 /* We mark the output section so that we know it comes
5958 from the input BFD. */
5959 osec = section->output_section;
5961 osec->segment_mark = TRUE;
5963 /* Check if this section is covered by the segment. */
5964 this_hdr = &(elf_section_data(section)->this_hdr);
5965 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5967 /* FIXME: Check if its output section is changed or
5968 removed. What else do we need to check? */
5970 || section->flags != osec->flags
5971 || section->lma != osec->lma
5972 || section->vma != osec->vma
5973 || section->size != osec->size
5974 || section->rawsize != osec->rawsize
5975 || section->alignment_power != osec->alignment_power)
5981 /* Check to see if any output section do not come from the
5983 for (section = obfd->sections; section != NULL;
5984 section = section->next)
5986 if (section->segment_mark == FALSE)
5989 section->segment_mark = FALSE;
5992 return copy_elf_program_header (ibfd, obfd);
5996 return rewrite_elf_program_header (ibfd, obfd);
5999 /* Initialize private output section information from input section. */
6002 _bfd_elf_init_private_section_data (bfd *ibfd,
6006 struct bfd_link_info *link_info)
6009 Elf_Internal_Shdr *ihdr, *ohdr;
6010 bfd_boolean need_group = link_info == NULL || link_info->relocatable;
6012 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6013 || obfd->xvec->flavour != bfd_target_elf_flavour)
6016 /* Don't copy the output ELF section type from input if the
6017 output BFD section flags have been set to something different.
6018 elf_fake_sections will set ELF section type based on BFD
6020 if (elf_section_type (osec) == SHT_NULL
6021 && (osec->flags == isec->flags || !osec->flags))
6022 elf_section_type (osec) = elf_section_type (isec);
6024 /* FIXME: Is this correct for all OS/PROC specific flags? */
6025 elf_section_flags (osec) |= (elf_section_flags (isec)
6026 & (SHF_MASKOS | SHF_MASKPROC));
6028 /* Set things up for objcopy and relocatable link. The output
6029 SHT_GROUP section will have its elf_next_in_group pointing back
6030 to the input group members. Ignore linker created group section.
6031 See elfNN_ia64_object_p in elfxx-ia64.c. */
6034 if (elf_sec_group (isec) == NULL
6035 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
6037 if (elf_section_flags (isec) & SHF_GROUP)
6038 elf_section_flags (osec) |= SHF_GROUP;
6039 elf_next_in_group (osec) = elf_next_in_group (isec);
6040 elf_section_data (osec)->group = elf_section_data (isec)->group;
6044 ihdr = &elf_section_data (isec)->this_hdr;
6046 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
6047 don't use the output section of the linked-to section since it
6048 may be NULL at this point. */
6049 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
6051 ohdr = &elf_section_data (osec)->this_hdr;
6052 ohdr->sh_flags |= SHF_LINK_ORDER;
6053 elf_linked_to_section (osec) = elf_linked_to_section (isec);
6056 osec->use_rela_p = isec->use_rela_p;
6061 /* Copy private section information. This copies over the entsize
6062 field, and sometimes the info field. */
6065 _bfd_elf_copy_private_section_data (bfd *ibfd,
6070 Elf_Internal_Shdr *ihdr, *ohdr;
6072 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6073 || obfd->xvec->flavour != bfd_target_elf_flavour)
6076 ihdr = &elf_section_data (isec)->this_hdr;
6077 ohdr = &elf_section_data (osec)->this_hdr;
6079 ohdr->sh_entsize = ihdr->sh_entsize;
6081 if (ihdr->sh_type == SHT_SYMTAB
6082 || ihdr->sh_type == SHT_DYNSYM
6083 || ihdr->sh_type == SHT_GNU_verneed
6084 || ihdr->sh_type == SHT_GNU_verdef)
6085 ohdr->sh_info = ihdr->sh_info;
6087 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
6091 /* Copy private header information. */
6094 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
6098 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6099 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6102 /* Copy over private BFD data if it has not already been copied.
6103 This must be done here, rather than in the copy_private_bfd_data
6104 entry point, because the latter is called after the section
6105 contents have been set, which means that the program headers have
6106 already been worked out. */
6107 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
6109 if (! copy_private_bfd_data (ibfd, obfd))
6113 /* _bfd_elf_copy_private_section_data copied over the SHF_GROUP flag
6114 but this might be wrong if we deleted the group section. */
6115 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
6116 if (elf_section_type (isec) == SHT_GROUP
6117 && isec->output_section == NULL)
6119 asection *first = elf_next_in_group (isec);
6120 asection *s = first;
6123 if (s->output_section != NULL)
6125 elf_section_flags (s->output_section) &= ~SHF_GROUP;
6126 elf_group_name (s->output_section) = NULL;
6128 s = elf_next_in_group (s);
6137 /* Copy private symbol information. If this symbol is in a section
6138 which we did not map into a BFD section, try to map the section
6139 index correctly. We use special macro definitions for the mapped
6140 section indices; these definitions are interpreted by the
6141 swap_out_syms function. */
6143 #define MAP_ONESYMTAB (SHN_HIOS + 1)
6144 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
6145 #define MAP_STRTAB (SHN_HIOS + 3)
6146 #define MAP_SHSTRTAB (SHN_HIOS + 4)
6147 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
6150 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
6155 elf_symbol_type *isym, *osym;
6157 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6158 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6161 isym = elf_symbol_from (ibfd, isymarg);
6162 osym = elf_symbol_from (obfd, osymarg);
6165 && isym->internal_elf_sym.st_shndx != 0
6167 && bfd_is_abs_section (isym->symbol.section))
6171 shndx = isym->internal_elf_sym.st_shndx;
6172 if (shndx == elf_onesymtab (ibfd))
6173 shndx = MAP_ONESYMTAB;
6174 else if (shndx == elf_dynsymtab (ibfd))
6175 shndx = MAP_DYNSYMTAB;
6176 else if (shndx == elf_tdata (ibfd)->strtab_section)
6178 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
6179 shndx = MAP_SHSTRTAB;
6180 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
6181 shndx = MAP_SYM_SHNDX;
6182 osym->internal_elf_sym.st_shndx = shndx;
6188 /* Swap out the symbols. */
6191 swap_out_syms (bfd *abfd,
6192 struct bfd_strtab_hash **sttp,
6195 const struct elf_backend_data *bed;
6198 struct bfd_strtab_hash *stt;
6199 Elf_Internal_Shdr *symtab_hdr;
6200 Elf_Internal_Shdr *symtab_shndx_hdr;
6201 Elf_Internal_Shdr *symstrtab_hdr;
6202 bfd_byte *outbound_syms;
6203 bfd_byte *outbound_shndx;
6206 bfd_boolean name_local_sections;
6208 if (!elf_map_symbols (abfd))
6211 /* Dump out the symtabs. */
6212 stt = _bfd_elf_stringtab_init ();
6216 bed = get_elf_backend_data (abfd);
6217 symcount = bfd_get_symcount (abfd);
6218 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6219 symtab_hdr->sh_type = SHT_SYMTAB;
6220 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6221 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6222 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
6223 symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
6225 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6226 symstrtab_hdr->sh_type = SHT_STRTAB;
6228 outbound_syms = bfd_alloc2 (abfd, 1 + symcount, bed->s->sizeof_sym);
6229 if (outbound_syms == NULL)
6231 _bfd_stringtab_free (stt);
6234 symtab_hdr->contents = outbound_syms;
6236 outbound_shndx = NULL;
6237 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6238 if (symtab_shndx_hdr->sh_name != 0)
6240 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6241 outbound_shndx = bfd_zalloc2 (abfd, 1 + symcount,
6242 sizeof (Elf_External_Sym_Shndx));
6243 if (outbound_shndx == NULL)
6245 _bfd_stringtab_free (stt);
6249 symtab_shndx_hdr->contents = outbound_shndx;
6250 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6251 symtab_shndx_hdr->sh_size = amt;
6252 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6253 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6256 /* Now generate the data (for "contents"). */
6258 /* Fill in zeroth symbol and swap it out. */
6259 Elf_Internal_Sym sym;
6265 sym.st_shndx = SHN_UNDEF;
6266 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6267 outbound_syms += bed->s->sizeof_sym;
6268 if (outbound_shndx != NULL)
6269 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6273 = (bed->elf_backend_name_local_section_symbols
6274 && bed->elf_backend_name_local_section_symbols (abfd));
6276 syms = bfd_get_outsymbols (abfd);
6277 for (idx = 0; idx < symcount; idx++)
6279 Elf_Internal_Sym sym;
6280 bfd_vma value = syms[idx]->value;
6281 elf_symbol_type *type_ptr;
6282 flagword flags = syms[idx]->flags;
6285 if (!name_local_sections
6286 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6288 /* Local section symbols have no name. */
6293 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6296 if (sym.st_name == (unsigned long) -1)
6298 _bfd_stringtab_free (stt);
6303 type_ptr = elf_symbol_from (abfd, syms[idx]);
6305 if ((flags & BSF_SECTION_SYM) == 0
6306 && bfd_is_com_section (syms[idx]->section))
6308 /* ELF common symbols put the alignment into the `value' field,
6309 and the size into the `size' field. This is backwards from
6310 how BFD handles it, so reverse it here. */
6311 sym.st_size = value;
6312 if (type_ptr == NULL
6313 || type_ptr->internal_elf_sym.st_value == 0)
6314 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6316 sym.st_value = type_ptr->internal_elf_sym.st_value;
6317 sym.st_shndx = _bfd_elf_section_from_bfd_section
6318 (abfd, syms[idx]->section);
6322 asection *sec = syms[idx]->section;
6325 if (sec->output_section)
6327 value += sec->output_offset;
6328 sec = sec->output_section;
6331 /* Don't add in the section vma for relocatable output. */
6332 if (! relocatable_p)
6334 sym.st_value = value;
6335 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6337 if (bfd_is_abs_section (sec)
6339 && type_ptr->internal_elf_sym.st_shndx != 0)
6341 /* This symbol is in a real ELF section which we did
6342 not create as a BFD section. Undo the mapping done
6343 by copy_private_symbol_data. */
6344 shndx = type_ptr->internal_elf_sym.st_shndx;
6348 shndx = elf_onesymtab (abfd);
6351 shndx = elf_dynsymtab (abfd);
6354 shndx = elf_tdata (abfd)->strtab_section;
6357 shndx = elf_tdata (abfd)->shstrtab_section;
6360 shndx = elf_tdata (abfd)->symtab_shndx_section;
6368 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6370 if (shndx == SHN_BAD)
6374 /* Writing this would be a hell of a lot easier if
6375 we had some decent documentation on bfd, and
6376 knew what to expect of the library, and what to
6377 demand of applications. For example, it
6378 appears that `objcopy' might not set the
6379 section of a symbol to be a section that is
6380 actually in the output file. */
6381 sec2 = bfd_get_section_by_name (abfd, sec->name);
6384 _bfd_error_handler (_("\
6385 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6386 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6388 bfd_set_error (bfd_error_invalid_operation);
6389 _bfd_stringtab_free (stt);
6393 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6394 BFD_ASSERT (shndx != SHN_BAD);
6398 sym.st_shndx = shndx;
6401 if ((flags & BSF_THREAD_LOCAL) != 0)
6403 else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0)
6404 type = STT_GNU_IFUNC;
6405 else if ((flags & BSF_FUNCTION) != 0)
6407 else if ((flags & BSF_OBJECT) != 0)
6409 else if ((flags & BSF_RELC) != 0)
6411 else if ((flags & BSF_SRELC) != 0)
6416 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6419 /* Processor-specific types. */
6420 if (type_ptr != NULL
6421 && bed->elf_backend_get_symbol_type)
6422 type = ((*bed->elf_backend_get_symbol_type)
6423 (&type_ptr->internal_elf_sym, type));
6425 if (flags & BSF_SECTION_SYM)
6427 if (flags & BSF_GLOBAL)
6428 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6430 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6432 else if (bfd_is_com_section (syms[idx]->section))
6434 #ifdef USE_STT_COMMON
6435 if (type == STT_OBJECT)
6436 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_COMMON);
6439 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6441 else if (bfd_is_und_section (syms[idx]->section))
6442 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6446 else if (flags & BSF_FILE)
6447 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6450 int bind = STB_LOCAL;
6452 if (flags & BSF_LOCAL)
6454 else if (flags & BSF_GNU_UNIQUE)
6455 bind = STB_GNU_UNIQUE;
6456 else if (flags & BSF_WEAK)
6458 else if (flags & BSF_GLOBAL)
6461 sym.st_info = ELF_ST_INFO (bind, type);
6464 if (type_ptr != NULL)
6465 sym.st_other = type_ptr->internal_elf_sym.st_other;
6469 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6470 outbound_syms += bed->s->sizeof_sym;
6471 if (outbound_shndx != NULL)
6472 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6476 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6477 symstrtab_hdr->sh_type = SHT_STRTAB;
6479 symstrtab_hdr->sh_flags = 0;
6480 symstrtab_hdr->sh_addr = 0;
6481 symstrtab_hdr->sh_entsize = 0;
6482 symstrtab_hdr->sh_link = 0;
6483 symstrtab_hdr->sh_info = 0;
6484 symstrtab_hdr->sh_addralign = 1;
6489 /* Return the number of bytes required to hold the symtab vector.
6491 Note that we base it on the count plus 1, since we will null terminate
6492 the vector allocated based on this size. However, the ELF symbol table
6493 always has a dummy entry as symbol #0, so it ends up even. */
6496 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6500 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6502 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6503 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6505 symtab_size -= sizeof (asymbol *);
6511 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6515 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6517 if (elf_dynsymtab (abfd) == 0)
6519 bfd_set_error (bfd_error_invalid_operation);
6523 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6524 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6526 symtab_size -= sizeof (asymbol *);
6532 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6535 return (asect->reloc_count + 1) * sizeof (arelent *);
6538 /* Canonicalize the relocs. */
6541 _bfd_elf_canonicalize_reloc (bfd *abfd,
6548 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6550 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6553 tblptr = section->relocation;
6554 for (i = 0; i < section->reloc_count; i++)
6555 *relptr++ = tblptr++;
6559 return section->reloc_count;
6563 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6565 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6566 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6569 bfd_get_symcount (abfd) = symcount;
6574 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6575 asymbol **allocation)
6577 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6578 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6581 bfd_get_dynamic_symcount (abfd) = symcount;
6585 /* Return the size required for the dynamic reloc entries. Any loadable
6586 section that was actually installed in the BFD, and has type SHT_REL
6587 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6588 dynamic reloc section. */
6591 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6596 if (elf_dynsymtab (abfd) == 0)
6598 bfd_set_error (bfd_error_invalid_operation);
6602 ret = sizeof (arelent *);
6603 for (s = abfd->sections; s != NULL; s = s->next)
6604 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6605 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6606 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6607 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6608 * sizeof (arelent *));
6613 /* Canonicalize the dynamic relocation entries. Note that we return the
6614 dynamic relocations as a single block, although they are actually
6615 associated with particular sections; the interface, which was
6616 designed for SunOS style shared libraries, expects that there is only
6617 one set of dynamic relocs. Any loadable section that was actually
6618 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6619 dynamic symbol table, is considered to be a dynamic reloc section. */
6622 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6626 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6630 if (elf_dynsymtab (abfd) == 0)
6632 bfd_set_error (bfd_error_invalid_operation);
6636 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6638 for (s = abfd->sections; s != NULL; s = s->next)
6640 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6641 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6642 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6647 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6649 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6651 for (i = 0; i < count; i++)
6662 /* Read in the version information. */
6665 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6667 bfd_byte *contents = NULL;
6668 unsigned int freeidx = 0;
6670 if (elf_dynverref (abfd) != 0)
6672 Elf_Internal_Shdr *hdr;
6673 Elf_External_Verneed *everneed;
6674 Elf_Internal_Verneed *iverneed;
6676 bfd_byte *contents_end;
6678 hdr = &elf_tdata (abfd)->dynverref_hdr;
6680 elf_tdata (abfd)->verref = bfd_zalloc2 (abfd, hdr->sh_info,
6681 sizeof (Elf_Internal_Verneed));
6682 if (elf_tdata (abfd)->verref == NULL)
6685 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6687 contents = bfd_malloc (hdr->sh_size);
6688 if (contents == NULL)
6690 error_return_verref:
6691 elf_tdata (abfd)->verref = NULL;
6692 elf_tdata (abfd)->cverrefs = 0;
6695 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6696 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6697 goto error_return_verref;
6699 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6700 goto error_return_verref;
6702 BFD_ASSERT (sizeof (Elf_External_Verneed)
6703 == sizeof (Elf_External_Vernaux));
6704 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6705 everneed = (Elf_External_Verneed *) contents;
6706 iverneed = elf_tdata (abfd)->verref;
6707 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6709 Elf_External_Vernaux *evernaux;
6710 Elf_Internal_Vernaux *ivernaux;
6713 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6715 iverneed->vn_bfd = abfd;
6717 iverneed->vn_filename =
6718 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6720 if (iverneed->vn_filename == NULL)
6721 goto error_return_verref;
6723 if (iverneed->vn_cnt == 0)
6724 iverneed->vn_auxptr = NULL;
6727 iverneed->vn_auxptr = bfd_alloc2 (abfd, iverneed->vn_cnt,
6728 sizeof (Elf_Internal_Vernaux));
6729 if (iverneed->vn_auxptr == NULL)
6730 goto error_return_verref;
6733 if (iverneed->vn_aux
6734 > (size_t) (contents_end - (bfd_byte *) everneed))
6735 goto error_return_verref;
6737 evernaux = ((Elf_External_Vernaux *)
6738 ((bfd_byte *) everneed + iverneed->vn_aux));
6739 ivernaux = iverneed->vn_auxptr;
6740 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6742 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6744 ivernaux->vna_nodename =
6745 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6746 ivernaux->vna_name);
6747 if (ivernaux->vna_nodename == NULL)
6748 goto error_return_verref;
6750 if (j + 1 < iverneed->vn_cnt)
6751 ivernaux->vna_nextptr = ivernaux + 1;
6753 ivernaux->vna_nextptr = NULL;
6755 if (ivernaux->vna_next
6756 > (size_t) (contents_end - (bfd_byte *) evernaux))
6757 goto error_return_verref;
6759 evernaux = ((Elf_External_Vernaux *)
6760 ((bfd_byte *) evernaux + ivernaux->vna_next));
6762 if (ivernaux->vna_other > freeidx)
6763 freeidx = ivernaux->vna_other;
6766 if (i + 1 < hdr->sh_info)
6767 iverneed->vn_nextref = iverneed + 1;
6769 iverneed->vn_nextref = NULL;
6771 if (iverneed->vn_next
6772 > (size_t) (contents_end - (bfd_byte *) everneed))
6773 goto error_return_verref;
6775 everneed = ((Elf_External_Verneed *)
6776 ((bfd_byte *) everneed + iverneed->vn_next));
6783 if (elf_dynverdef (abfd) != 0)
6785 Elf_Internal_Shdr *hdr;
6786 Elf_External_Verdef *everdef;
6787 Elf_Internal_Verdef *iverdef;
6788 Elf_Internal_Verdef *iverdefarr;
6789 Elf_Internal_Verdef iverdefmem;
6791 unsigned int maxidx;
6792 bfd_byte *contents_end_def, *contents_end_aux;
6794 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6796 contents = bfd_malloc (hdr->sh_size);
6797 if (contents == NULL)
6799 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6800 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6803 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
6806 BFD_ASSERT (sizeof (Elf_External_Verdef)
6807 >= sizeof (Elf_External_Verdaux));
6808 contents_end_def = contents + hdr->sh_size
6809 - sizeof (Elf_External_Verdef);
6810 contents_end_aux = contents + hdr->sh_size
6811 - sizeof (Elf_External_Verdaux);
6813 /* We know the number of entries in the section but not the maximum
6814 index. Therefore we have to run through all entries and find
6816 everdef = (Elf_External_Verdef *) contents;
6818 for (i = 0; i < hdr->sh_info; ++i)
6820 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6822 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6823 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6825 if (iverdefmem.vd_next
6826 > (size_t) (contents_end_def - (bfd_byte *) everdef))
6829 everdef = ((Elf_External_Verdef *)
6830 ((bfd_byte *) everdef + iverdefmem.vd_next));
6833 if (default_imported_symver)
6835 if (freeidx > maxidx)
6840 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, maxidx,
6841 sizeof (Elf_Internal_Verdef));
6842 if (elf_tdata (abfd)->verdef == NULL)
6845 elf_tdata (abfd)->cverdefs = maxidx;
6847 everdef = (Elf_External_Verdef *) contents;
6848 iverdefarr = elf_tdata (abfd)->verdef;
6849 for (i = 0; i < hdr->sh_info; i++)
6851 Elf_External_Verdaux *everdaux;
6852 Elf_Internal_Verdaux *iverdaux;
6855 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6857 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
6859 error_return_verdef:
6860 elf_tdata (abfd)->verdef = NULL;
6861 elf_tdata (abfd)->cverdefs = 0;
6865 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6866 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6868 iverdef->vd_bfd = abfd;
6870 if (iverdef->vd_cnt == 0)
6871 iverdef->vd_auxptr = NULL;
6874 iverdef->vd_auxptr = bfd_alloc2 (abfd, iverdef->vd_cnt,
6875 sizeof (Elf_Internal_Verdaux));
6876 if (iverdef->vd_auxptr == NULL)
6877 goto error_return_verdef;
6881 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
6882 goto error_return_verdef;
6884 everdaux = ((Elf_External_Verdaux *)
6885 ((bfd_byte *) everdef + iverdef->vd_aux));
6886 iverdaux = iverdef->vd_auxptr;
6887 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6889 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6891 iverdaux->vda_nodename =
6892 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6893 iverdaux->vda_name);
6894 if (iverdaux->vda_nodename == NULL)
6895 goto error_return_verdef;
6897 if (j + 1 < iverdef->vd_cnt)
6898 iverdaux->vda_nextptr = iverdaux + 1;
6900 iverdaux->vda_nextptr = NULL;
6902 if (iverdaux->vda_next
6903 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
6904 goto error_return_verdef;
6906 everdaux = ((Elf_External_Verdaux *)
6907 ((bfd_byte *) everdaux + iverdaux->vda_next));
6910 if (iverdef->vd_cnt)
6911 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6913 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
6914 iverdef->vd_nextdef = iverdef + 1;
6916 iverdef->vd_nextdef = NULL;
6918 everdef = ((Elf_External_Verdef *)
6919 ((bfd_byte *) everdef + iverdef->vd_next));
6925 else if (default_imported_symver)
6932 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, freeidx,
6933 sizeof (Elf_Internal_Verdef));
6934 if (elf_tdata (abfd)->verdef == NULL)
6937 elf_tdata (abfd)->cverdefs = freeidx;
6940 /* Create a default version based on the soname. */
6941 if (default_imported_symver)
6943 Elf_Internal_Verdef *iverdef;
6944 Elf_Internal_Verdaux *iverdaux;
6946 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6948 iverdef->vd_version = VER_DEF_CURRENT;
6949 iverdef->vd_flags = 0;
6950 iverdef->vd_ndx = freeidx;
6951 iverdef->vd_cnt = 1;
6953 iverdef->vd_bfd = abfd;
6955 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6956 if (iverdef->vd_nodename == NULL)
6957 goto error_return_verdef;
6958 iverdef->vd_nextdef = NULL;
6959 iverdef->vd_auxptr = bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
6960 if (iverdef->vd_auxptr == NULL)
6961 goto error_return_verdef;
6963 iverdaux = iverdef->vd_auxptr;
6964 iverdaux->vda_nodename = iverdef->vd_nodename;
6965 iverdaux->vda_nextptr = NULL;
6971 if (contents != NULL)
6977 _bfd_elf_make_empty_symbol (bfd *abfd)
6979 elf_symbol_type *newsym;
6980 bfd_size_type amt = sizeof (elf_symbol_type);
6982 newsym = bfd_zalloc (abfd, amt);
6987 newsym->symbol.the_bfd = abfd;
6988 return &newsym->symbol;
6993 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
6997 bfd_symbol_info (symbol, ret);
7000 /* Return whether a symbol name implies a local symbol. Most targets
7001 use this function for the is_local_label_name entry point, but some
7005 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
7008 /* Normal local symbols start with ``.L''. */
7009 if (name[0] == '.' && name[1] == 'L')
7012 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
7013 DWARF debugging symbols starting with ``..''. */
7014 if (name[0] == '.' && name[1] == '.')
7017 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
7018 emitting DWARF debugging output. I suspect this is actually a
7019 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
7020 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
7021 underscore to be emitted on some ELF targets). For ease of use,
7022 we treat such symbols as local. */
7023 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
7030 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
7031 asymbol *symbol ATTRIBUTE_UNUSED)
7038 _bfd_elf_set_arch_mach (bfd *abfd,
7039 enum bfd_architecture arch,
7040 unsigned long machine)
7042 /* If this isn't the right architecture for this backend, and this
7043 isn't the generic backend, fail. */
7044 if (arch != get_elf_backend_data (abfd)->arch
7045 && arch != bfd_arch_unknown
7046 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
7049 return bfd_default_set_arch_mach (abfd, arch, machine);
7052 /* Find the function to a particular section and offset,
7053 for error reporting. */
7056 elf_find_function (bfd *abfd,
7060 const char **filename_ptr,
7061 const char **functionname_ptr)
7063 const char *filename;
7064 asymbol *func, *file;
7067 /* ??? Given multiple file symbols, it is impossible to reliably
7068 choose the right file name for global symbols. File symbols are
7069 local symbols, and thus all file symbols must sort before any
7070 global symbols. The ELF spec may be interpreted to say that a
7071 file symbol must sort before other local symbols, but currently
7072 ld -r doesn't do this. So, for ld -r output, it is possible to
7073 make a better choice of file name for local symbols by ignoring
7074 file symbols appearing after a given local symbol. */
7075 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
7076 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7082 state = nothing_seen;
7084 for (p = symbols; *p != NULL; p++)
7089 q = (elf_symbol_type *) *p;
7091 type = ELF_ST_TYPE (q->internal_elf_sym.st_info);
7096 if (state == symbol_seen)
7097 state = file_after_symbol_seen;
7100 if (!bed->is_function_type (type))
7103 if (bfd_get_section (&q->symbol) == section
7104 && q->symbol.value >= low_func
7105 && q->symbol.value <= offset)
7107 func = (asymbol *) q;
7108 low_func = q->symbol.value;
7111 && (ELF_ST_BIND (q->internal_elf_sym.st_info) == STB_LOCAL
7112 || state != file_after_symbol_seen))
7113 filename = bfd_asymbol_name (file);
7117 if (state == nothing_seen)
7118 state = symbol_seen;
7125 *filename_ptr = filename;
7126 if (functionname_ptr)
7127 *functionname_ptr = bfd_asymbol_name (func);
7132 /* Find the nearest line to a particular section and offset,
7133 for error reporting. */
7136 _bfd_elf_find_nearest_line (bfd *abfd,
7140 const char **filename_ptr,
7141 const char **functionname_ptr,
7142 unsigned int *line_ptr)
7146 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
7147 filename_ptr, functionname_ptr,
7150 if (!*functionname_ptr)
7151 elf_find_function (abfd, section, symbols, offset,
7152 *filename_ptr ? NULL : filename_ptr,
7158 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
7159 filename_ptr, functionname_ptr,
7161 &elf_tdata (abfd)->dwarf2_find_line_info))
7163 if (!*functionname_ptr)
7164 elf_find_function (abfd, section, symbols, offset,
7165 *filename_ptr ? NULL : filename_ptr,
7171 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7172 &found, filename_ptr,
7173 functionname_ptr, line_ptr,
7174 &elf_tdata (abfd)->line_info))
7176 if (found && (*functionname_ptr || *line_ptr))
7179 if (symbols == NULL)
7182 if (! elf_find_function (abfd, section, symbols, offset,
7183 filename_ptr, functionname_ptr))
7190 /* Find the line for a symbol. */
7193 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
7194 const char **filename_ptr, unsigned int *line_ptr)
7196 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
7197 filename_ptr, line_ptr, 0,
7198 &elf_tdata (abfd)->dwarf2_find_line_info);
7201 /* After a call to bfd_find_nearest_line, successive calls to
7202 bfd_find_inliner_info can be used to get source information about
7203 each level of function inlining that terminated at the address
7204 passed to bfd_find_nearest_line. Currently this is only supported
7205 for DWARF2 with appropriate DWARF3 extensions. */
7208 _bfd_elf_find_inliner_info (bfd *abfd,
7209 const char **filename_ptr,
7210 const char **functionname_ptr,
7211 unsigned int *line_ptr)
7214 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7215 functionname_ptr, line_ptr,
7216 & elf_tdata (abfd)->dwarf2_find_line_info);
7221 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
7223 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7224 int ret = bed->s->sizeof_ehdr;
7226 if (!info->relocatable)
7228 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
7230 if (phdr_size == (bfd_size_type) -1)
7232 struct elf_segment_map *m;
7235 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
7236 phdr_size += bed->s->sizeof_phdr;
7239 phdr_size = get_program_header_size (abfd, info);
7242 elf_tdata (abfd)->program_header_size = phdr_size;
7250 _bfd_elf_set_section_contents (bfd *abfd,
7252 const void *location,
7254 bfd_size_type count)
7256 Elf_Internal_Shdr *hdr;
7259 if (! abfd->output_has_begun
7260 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7263 hdr = &elf_section_data (section)->this_hdr;
7264 pos = hdr->sh_offset + offset;
7265 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7266 || bfd_bwrite (location, count, abfd) != count)
7273 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7274 arelent *cache_ptr ATTRIBUTE_UNUSED,
7275 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7280 /* Try to convert a non-ELF reloc into an ELF one. */
7283 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7285 /* Check whether we really have an ELF howto. */
7287 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7289 bfd_reloc_code_real_type code;
7290 reloc_howto_type *howto;
7292 /* Alien reloc: Try to determine its type to replace it with an
7293 equivalent ELF reloc. */
7295 if (areloc->howto->pc_relative)
7297 switch (areloc->howto->bitsize)
7300 code = BFD_RELOC_8_PCREL;
7303 code = BFD_RELOC_12_PCREL;
7306 code = BFD_RELOC_16_PCREL;
7309 code = BFD_RELOC_24_PCREL;
7312 code = BFD_RELOC_32_PCREL;
7315 code = BFD_RELOC_64_PCREL;
7321 howto = bfd_reloc_type_lookup (abfd, code);
7323 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7325 if (howto->pcrel_offset)
7326 areloc->addend += areloc->address;
7328 areloc->addend -= areloc->address; /* addend is unsigned!! */
7333 switch (areloc->howto->bitsize)
7339 code = BFD_RELOC_14;
7342 code = BFD_RELOC_16;
7345 code = BFD_RELOC_26;
7348 code = BFD_RELOC_32;
7351 code = BFD_RELOC_64;
7357 howto = bfd_reloc_type_lookup (abfd, code);
7361 areloc->howto = howto;
7369 (*_bfd_error_handler)
7370 (_("%B: unsupported relocation type %s"),
7371 abfd, areloc->howto->name);
7372 bfd_set_error (bfd_error_bad_value);
7377 _bfd_elf_close_and_cleanup (bfd *abfd)
7379 if (bfd_get_format (abfd) == bfd_object)
7381 if (elf_tdata (abfd) != NULL && elf_shstrtab (abfd) != NULL)
7382 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7383 _bfd_dwarf2_cleanup_debug_info (abfd);
7386 return _bfd_generic_close_and_cleanup (abfd);
7389 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7390 in the relocation's offset. Thus we cannot allow any sort of sanity
7391 range-checking to interfere. There is nothing else to do in processing
7394 bfd_reloc_status_type
7395 _bfd_elf_rel_vtable_reloc_fn
7396 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7397 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7398 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7399 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7401 return bfd_reloc_ok;
7404 /* Elf core file support. Much of this only works on native
7405 toolchains, since we rely on knowing the
7406 machine-dependent procfs structure in order to pick
7407 out details about the corefile. */
7409 #ifdef HAVE_SYS_PROCFS_H
7410 # include <sys/procfs.h>
7413 /* FIXME: this is kinda wrong, but it's what gdb wants. */
7416 elfcore_make_pid (bfd *abfd)
7418 return ((elf_tdata (abfd)->core_lwpid << 16)
7419 + (elf_tdata (abfd)->core_pid));
7422 /* If there isn't a section called NAME, make one, using
7423 data from SECT. Note, this function will generate a
7424 reference to NAME, so you shouldn't deallocate or
7428 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7432 if (bfd_get_section_by_name (abfd, name) != NULL)
7435 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
7439 sect2->size = sect->size;
7440 sect2->filepos = sect->filepos;
7441 sect2->alignment_power = sect->alignment_power;
7445 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7446 actually creates up to two pseudosections:
7447 - For the single-threaded case, a section named NAME, unless
7448 such a section already exists.
7449 - For the multi-threaded case, a section named "NAME/PID", where
7450 PID is elfcore_make_pid (abfd).
7451 Both pseudosections have identical contents. */
7453 _bfd_elfcore_make_pseudosection (bfd *abfd,
7459 char *threaded_name;
7463 /* Build the section name. */
7465 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7466 len = strlen (buf) + 1;
7467 threaded_name = bfd_alloc (abfd, len);
7468 if (threaded_name == NULL)
7470 memcpy (threaded_name, buf, len);
7472 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
7477 sect->filepos = filepos;
7478 sect->alignment_power = 2;
7480 return elfcore_maybe_make_sect (abfd, name, sect);
7483 /* prstatus_t exists on:
7485 linux 2.[01] + glibc
7489 #if defined (HAVE_PRSTATUS_T)
7492 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7497 if (note->descsz == sizeof (prstatus_t))
7501 size = sizeof (prstat.pr_reg);
7502 offset = offsetof (prstatus_t, pr_reg);
7503 memcpy (&prstat, note->descdata, sizeof (prstat));
7505 /* Do not overwrite the core signal if it
7506 has already been set by another thread. */
7507 if (elf_tdata (abfd)->core_signal == 0)
7508 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7509 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7511 /* pr_who exists on:
7514 pr_who doesn't exist on:
7517 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7518 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7521 #if defined (HAVE_PRSTATUS32_T)
7522 else if (note->descsz == sizeof (prstatus32_t))
7524 /* 64-bit host, 32-bit corefile */
7525 prstatus32_t prstat;
7527 size = sizeof (prstat.pr_reg);
7528 offset = offsetof (prstatus32_t, pr_reg);
7529 memcpy (&prstat, note->descdata, sizeof (prstat));
7531 /* Do not overwrite the core signal if it
7532 has already been set by another thread. */
7533 if (elf_tdata (abfd)->core_signal == 0)
7534 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7535 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7537 /* pr_who exists on:
7540 pr_who doesn't exist on:
7543 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7544 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7547 #endif /* HAVE_PRSTATUS32_T */
7550 /* Fail - we don't know how to handle any other
7551 note size (ie. data object type). */
7555 /* Make a ".reg/999" section and a ".reg" section. */
7556 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7557 size, note->descpos + offset);
7559 #endif /* defined (HAVE_PRSTATUS_T) */
7561 /* Create a pseudosection containing the exact contents of NOTE. */
7563 elfcore_make_note_pseudosection (bfd *abfd,
7565 Elf_Internal_Note *note)
7567 return _bfd_elfcore_make_pseudosection (abfd, name,
7568 note->descsz, note->descpos);
7571 /* There isn't a consistent prfpregset_t across platforms,
7572 but it doesn't matter, because we don't have to pick this
7573 data structure apart. */
7576 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7578 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7581 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7582 type of NT_PRXFPREG. Just include the whole note's contents
7586 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7588 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7592 elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note)
7594 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note);
7598 elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note)
7600 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note);
7603 #if defined (HAVE_PRPSINFO_T)
7604 typedef prpsinfo_t elfcore_psinfo_t;
7605 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7606 typedef prpsinfo32_t elfcore_psinfo32_t;
7610 #if defined (HAVE_PSINFO_T)
7611 typedef psinfo_t elfcore_psinfo_t;
7612 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7613 typedef psinfo32_t elfcore_psinfo32_t;
7617 /* return a malloc'ed copy of a string at START which is at
7618 most MAX bytes long, possibly without a terminating '\0'.
7619 the copy will always have a terminating '\0'. */
7622 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7625 char *end = memchr (start, '\0', max);
7633 dups = bfd_alloc (abfd, len + 1);
7637 memcpy (dups, start, len);
7643 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7645 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7647 if (note->descsz == sizeof (elfcore_psinfo_t))
7649 elfcore_psinfo_t psinfo;
7651 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7653 elf_tdata (abfd)->core_program
7654 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7655 sizeof (psinfo.pr_fname));
7657 elf_tdata (abfd)->core_command
7658 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7659 sizeof (psinfo.pr_psargs));
7661 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7662 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7664 /* 64-bit host, 32-bit corefile */
7665 elfcore_psinfo32_t psinfo;
7667 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7669 elf_tdata (abfd)->core_program
7670 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7671 sizeof (psinfo.pr_fname));
7673 elf_tdata (abfd)->core_command
7674 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7675 sizeof (psinfo.pr_psargs));
7681 /* Fail - we don't know how to handle any other
7682 note size (ie. data object type). */
7686 /* Note that for some reason, a spurious space is tacked
7687 onto the end of the args in some (at least one anyway)
7688 implementations, so strip it off if it exists. */
7691 char *command = elf_tdata (abfd)->core_command;
7692 int n = strlen (command);
7694 if (0 < n && command[n - 1] == ' ')
7695 command[n - 1] = '\0';
7700 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7702 #if defined (HAVE_PSTATUS_T)
7704 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7706 if (note->descsz == sizeof (pstatus_t)
7707 #if defined (HAVE_PXSTATUS_T)
7708 || note->descsz == sizeof (pxstatus_t)
7714 memcpy (&pstat, note->descdata, sizeof (pstat));
7716 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7718 #if defined (HAVE_PSTATUS32_T)
7719 else if (note->descsz == sizeof (pstatus32_t))
7721 /* 64-bit host, 32-bit corefile */
7724 memcpy (&pstat, note->descdata, sizeof (pstat));
7726 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7729 /* Could grab some more details from the "representative"
7730 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7731 NT_LWPSTATUS note, presumably. */
7735 #endif /* defined (HAVE_PSTATUS_T) */
7737 #if defined (HAVE_LWPSTATUS_T)
7739 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7741 lwpstatus_t lwpstat;
7747 if (note->descsz != sizeof (lwpstat)
7748 #if defined (HAVE_LWPXSTATUS_T)
7749 && note->descsz != sizeof (lwpxstatus_t)
7754 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7756 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7757 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7759 /* Make a ".reg/999" section. */
7761 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7762 len = strlen (buf) + 1;
7763 name = bfd_alloc (abfd, len);
7766 memcpy (name, buf, len);
7768 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7772 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7773 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7774 sect->filepos = note->descpos
7775 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7778 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7779 sect->size = sizeof (lwpstat.pr_reg);
7780 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7783 sect->alignment_power = 2;
7785 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7788 /* Make a ".reg2/999" section */
7790 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7791 len = strlen (buf) + 1;
7792 name = bfd_alloc (abfd, len);
7795 memcpy (name, buf, len);
7797 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7801 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7802 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7803 sect->filepos = note->descpos
7804 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7807 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7808 sect->size = sizeof (lwpstat.pr_fpreg);
7809 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7812 sect->alignment_power = 2;
7814 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7816 #endif /* defined (HAVE_LWPSTATUS_T) */
7819 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7826 int is_active_thread;
7829 if (note->descsz < 728)
7832 if (! CONST_STRNEQ (note->namedata, "win32"))
7835 type = bfd_get_32 (abfd, note->descdata);
7839 case 1 /* NOTE_INFO_PROCESS */:
7840 /* FIXME: need to add ->core_command. */
7841 /* process_info.pid */
7842 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 8);
7843 /* process_info.signal */
7844 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 12);
7847 case 2 /* NOTE_INFO_THREAD */:
7848 /* Make a ".reg/999" section. */
7849 /* thread_info.tid */
7850 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
7852 len = strlen (buf) + 1;
7853 name = bfd_alloc (abfd, len);
7857 memcpy (name, buf, len);
7859 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7863 /* sizeof (thread_info.thread_context) */
7865 /* offsetof (thread_info.thread_context) */
7866 sect->filepos = note->descpos + 12;
7867 sect->alignment_power = 2;
7869 /* thread_info.is_active_thread */
7870 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
7872 if (is_active_thread)
7873 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7877 case 3 /* NOTE_INFO_MODULE */:
7878 /* Make a ".module/xxxxxxxx" section. */
7879 /* module_info.base_address */
7880 base_addr = bfd_get_32 (abfd, note->descdata + 4);
7881 sprintf (buf, ".module/%08lx", (unsigned long) base_addr);
7883 len = strlen (buf) + 1;
7884 name = bfd_alloc (abfd, len);
7888 memcpy (name, buf, len);
7890 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7895 sect->size = note->descsz;
7896 sect->filepos = note->descpos;
7897 sect->alignment_power = 2;
7908 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7910 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7918 if (bed->elf_backend_grok_prstatus)
7919 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7921 #if defined (HAVE_PRSTATUS_T)
7922 return elfcore_grok_prstatus (abfd, note);
7927 #if defined (HAVE_PSTATUS_T)
7929 return elfcore_grok_pstatus (abfd, note);
7932 #if defined (HAVE_LWPSTATUS_T)
7934 return elfcore_grok_lwpstatus (abfd, note);
7937 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7938 return elfcore_grok_prfpreg (abfd, note);
7940 case NT_WIN32PSTATUS:
7941 return elfcore_grok_win32pstatus (abfd, note);
7943 case NT_PRXFPREG: /* Linux SSE extension */
7944 if (note->namesz == 6
7945 && strcmp (note->namedata, "LINUX") == 0)
7946 return elfcore_grok_prxfpreg (abfd, note);
7951 if (note->namesz == 6
7952 && strcmp (note->namedata, "LINUX") == 0)
7953 return elfcore_grok_ppc_vmx (abfd, note);
7958 if (note->namesz == 6
7959 && strcmp (note->namedata, "LINUX") == 0)
7960 return elfcore_grok_ppc_vsx (abfd, note);
7966 if (bed->elf_backend_grok_psinfo)
7967 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7969 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7970 return elfcore_grok_psinfo (abfd, note);
7977 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
7982 sect->size = note->descsz;
7983 sect->filepos = note->descpos;
7984 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7992 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
7994 elf_tdata (abfd)->build_id_size = note->descsz;
7995 elf_tdata (abfd)->build_id = bfd_alloc (abfd, note->descsz);
7996 if (elf_tdata (abfd)->build_id == NULL)
7999 memcpy (elf_tdata (abfd)->build_id, note->descdata, note->descsz);
8005 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
8012 case NT_GNU_BUILD_ID:
8013 return elfobj_grok_gnu_build_id (abfd, note);
8018 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
8022 cp = strchr (note->namedata, '@');
8025 *lwpidp = atoi(cp + 1);
8032 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8034 /* Signal number at offset 0x08. */
8035 elf_tdata (abfd)->core_signal
8036 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8038 /* Process ID at offset 0x50. */
8039 elf_tdata (abfd)->core_pid
8040 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
8042 /* Command name at 0x7c (max 32 bytes, including nul). */
8043 elf_tdata (abfd)->core_command
8044 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
8046 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
8051 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
8055 if (elfcore_netbsd_get_lwpid (note, &lwp))
8056 elf_tdata (abfd)->core_lwpid = lwp;
8058 if (note->type == NT_NETBSDCORE_PROCINFO)
8060 /* NetBSD-specific core "procinfo". Note that we expect to
8061 find this note before any of the others, which is fine,
8062 since the kernel writes this note out first when it
8063 creates a core file. */
8065 return elfcore_grok_netbsd_procinfo (abfd, note);
8068 /* As of Jan 2002 there are no other machine-independent notes
8069 defined for NetBSD core files. If the note type is less
8070 than the start of the machine-dependent note types, we don't
8073 if (note->type < NT_NETBSDCORE_FIRSTMACH)
8077 switch (bfd_get_arch (abfd))
8079 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
8080 PT_GETFPREGS == mach+2. */
8082 case bfd_arch_alpha:
8083 case bfd_arch_sparc:
8086 case NT_NETBSDCORE_FIRSTMACH+0:
8087 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8089 case NT_NETBSDCORE_FIRSTMACH+2:
8090 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8096 /* On all other arch's, PT_GETREGS == mach+1 and
8097 PT_GETFPREGS == mach+3. */
8102 case NT_NETBSDCORE_FIRSTMACH+1:
8103 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8105 case NT_NETBSDCORE_FIRSTMACH+3:
8106 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8116 elfcore_grok_openbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8118 /* Signal number at offset 0x08. */
8119 elf_tdata (abfd)->core_signal
8120 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8122 /* Process ID at offset 0x20. */
8123 elf_tdata (abfd)->core_pid
8124 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x20);
8126 /* Command name at 0x48 (max 32 bytes, including nul). */
8127 elf_tdata (abfd)->core_command
8128 = _bfd_elfcore_strndup (abfd, note->descdata + 0x48, 31);
8134 elfcore_grok_openbsd_note (bfd *abfd, Elf_Internal_Note *note)
8136 if (note->type == NT_OPENBSD_PROCINFO)
8137 return elfcore_grok_openbsd_procinfo (abfd, note);
8139 if (note->type == NT_OPENBSD_REGS)
8140 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8142 if (note->type == NT_OPENBSD_FPREGS)
8143 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8145 if (note->type == NT_OPENBSD_XFPREGS)
8146 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
8148 if (note->type == NT_OPENBSD_AUXV)
8150 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8155 sect->size = note->descsz;
8156 sect->filepos = note->descpos;
8157 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8162 if (note->type == NT_OPENBSD_WCOOKIE)
8164 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
8169 sect->size = note->descsz;
8170 sect->filepos = note->descpos;
8171 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8180 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
8182 void *ddata = note->descdata;
8189 /* nto_procfs_status 'pid' field is at offset 0. */
8190 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
8192 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
8193 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
8195 /* nto_procfs_status 'flags' field is at offset 8. */
8196 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
8198 /* nto_procfs_status 'what' field is at offset 14. */
8199 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
8201 elf_tdata (abfd)->core_signal = sig;
8202 elf_tdata (abfd)->core_lwpid = *tid;
8205 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
8206 do not come from signals so we make sure we set the current
8207 thread just in case. */
8208 if (flags & 0x00000080)
8209 elf_tdata (abfd)->core_lwpid = *tid;
8211 /* Make a ".qnx_core_status/%d" section. */
8212 sprintf (buf, ".qnx_core_status/%ld", *tid);
8214 name = bfd_alloc (abfd, strlen (buf) + 1);
8219 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8223 sect->size = note->descsz;
8224 sect->filepos = note->descpos;
8225 sect->alignment_power = 2;
8227 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
8231 elfcore_grok_nto_regs (bfd *abfd,
8232 Elf_Internal_Note *note,
8240 /* Make a "(base)/%d" section. */
8241 sprintf (buf, "%s/%ld", base, tid);
8243 name = bfd_alloc (abfd, strlen (buf) + 1);
8248 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8252 sect->size = note->descsz;
8253 sect->filepos = note->descpos;
8254 sect->alignment_power = 2;
8256 /* This is the current thread. */
8257 if (elf_tdata (abfd)->core_lwpid == tid)
8258 return elfcore_maybe_make_sect (abfd, base, sect);
8263 #define BFD_QNT_CORE_INFO 7
8264 #define BFD_QNT_CORE_STATUS 8
8265 #define BFD_QNT_CORE_GREG 9
8266 #define BFD_QNT_CORE_FPREG 10
8269 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
8271 /* Every GREG section has a STATUS section before it. Store the
8272 tid from the previous call to pass down to the next gregs
8274 static long tid = 1;
8278 case BFD_QNT_CORE_INFO:
8279 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
8280 case BFD_QNT_CORE_STATUS:
8281 return elfcore_grok_nto_status (abfd, note, &tid);
8282 case BFD_QNT_CORE_GREG:
8283 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
8284 case BFD_QNT_CORE_FPREG:
8285 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
8292 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
8298 /* Use note name as section name. */
8300 name = bfd_alloc (abfd, len);
8303 memcpy (name, note->namedata, len);
8304 name[len - 1] = '\0';
8306 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8310 sect->size = note->descsz;
8311 sect->filepos = note->descpos;
8312 sect->alignment_power = 1;
8317 /* Function: elfcore_write_note
8320 buffer to hold note, and current size of buffer
8324 size of data for note
8326 Writes note to end of buffer. ELF64 notes are written exactly as
8327 for ELF32, despite the current (as of 2006) ELF gabi specifying
8328 that they ought to have 8-byte namesz and descsz field, and have
8329 8-byte alignment. Other writers, eg. Linux kernel, do the same.
8332 Pointer to realloc'd buffer, *BUFSIZ updated. */
8335 elfcore_write_note (bfd *abfd,
8343 Elf_External_Note *xnp;
8350 namesz = strlen (name) + 1;
8352 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
8354 buf = realloc (buf, *bufsiz + newspace);
8357 dest = buf + *bufsiz;
8358 *bufsiz += newspace;
8359 xnp = (Elf_External_Note *) dest;
8360 H_PUT_32 (abfd, namesz, xnp->namesz);
8361 H_PUT_32 (abfd, size, xnp->descsz);
8362 H_PUT_32 (abfd, type, xnp->type);
8366 memcpy (dest, name, namesz);
8374 memcpy (dest, input, size);
8384 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8386 elfcore_write_prpsinfo (bfd *abfd,
8392 const char *note_name = "CORE";
8393 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8395 if (bed->elf_backend_write_core_note != NULL)
8398 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8399 NT_PRPSINFO, fname, psargs);
8404 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8405 if (bed->s->elfclass == ELFCLASS32)
8407 #if defined (HAVE_PSINFO32_T)
8409 int note_type = NT_PSINFO;
8412 int note_type = NT_PRPSINFO;
8415 memset (&data, 0, sizeof (data));
8416 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8417 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8418 return elfcore_write_note (abfd, buf, bufsiz,
8419 note_name, note_type, &data, sizeof (data));
8424 #if defined (HAVE_PSINFO_T)
8426 int note_type = NT_PSINFO;
8429 int note_type = NT_PRPSINFO;
8432 memset (&data, 0, sizeof (data));
8433 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8434 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8435 return elfcore_write_note (abfd, buf, bufsiz,
8436 note_name, note_type, &data, sizeof (data));
8439 #endif /* PSINFO_T or PRPSINFO_T */
8441 #if defined (HAVE_PRSTATUS_T)
8443 elfcore_write_prstatus (bfd *abfd,
8450 const char *note_name = "CORE";
8451 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8453 if (bed->elf_backend_write_core_note != NULL)
8456 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8458 pid, cursig, gregs);
8463 #if defined (HAVE_PRSTATUS32_T)
8464 if (bed->s->elfclass == ELFCLASS32)
8466 prstatus32_t prstat;
8468 memset (&prstat, 0, sizeof (prstat));
8469 prstat.pr_pid = pid;
8470 prstat.pr_cursig = cursig;
8471 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8472 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8473 NT_PRSTATUS, &prstat, sizeof (prstat));
8480 memset (&prstat, 0, sizeof (prstat));
8481 prstat.pr_pid = pid;
8482 prstat.pr_cursig = cursig;
8483 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8484 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8485 NT_PRSTATUS, &prstat, sizeof (prstat));
8488 #endif /* HAVE_PRSTATUS_T */
8490 #if defined (HAVE_LWPSTATUS_T)
8492 elfcore_write_lwpstatus (bfd *abfd,
8499 lwpstatus_t lwpstat;
8500 const char *note_name = "CORE";
8502 memset (&lwpstat, 0, sizeof (lwpstat));
8503 lwpstat.pr_lwpid = pid >> 16;
8504 lwpstat.pr_cursig = cursig;
8505 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8506 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
8507 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8509 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
8510 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
8512 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
8513 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
8516 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8517 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
8519 #endif /* HAVE_LWPSTATUS_T */
8521 #if defined (HAVE_PSTATUS_T)
8523 elfcore_write_pstatus (bfd *abfd,
8527 int cursig ATTRIBUTE_UNUSED,
8528 const void *gregs ATTRIBUTE_UNUSED)
8530 const char *note_name = "CORE";
8531 #if defined (HAVE_PSTATUS32_T)
8532 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8534 if (bed->s->elfclass == ELFCLASS32)
8538 memset (&pstat, 0, sizeof (pstat));
8539 pstat.pr_pid = pid & 0xffff;
8540 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8541 NT_PSTATUS, &pstat, sizeof (pstat));
8549 memset (&pstat, 0, sizeof (pstat));
8550 pstat.pr_pid = pid & 0xffff;
8551 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8552 NT_PSTATUS, &pstat, sizeof (pstat));
8556 #endif /* HAVE_PSTATUS_T */
8559 elfcore_write_prfpreg (bfd *abfd,
8565 const char *note_name = "CORE";
8566 return elfcore_write_note (abfd, buf, bufsiz,
8567 note_name, NT_FPREGSET, fpregs, size);
8571 elfcore_write_prxfpreg (bfd *abfd,
8574 const void *xfpregs,
8577 char *note_name = "LINUX";
8578 return elfcore_write_note (abfd, buf, bufsiz,
8579 note_name, NT_PRXFPREG, xfpregs, size);
8583 elfcore_write_ppc_vmx (bfd *abfd,
8586 const void *ppc_vmx,
8589 char *note_name = "LINUX";
8590 return elfcore_write_note (abfd, buf, bufsiz,
8591 note_name, NT_PPC_VMX, ppc_vmx, size);
8595 elfcore_write_ppc_vsx (bfd *abfd,
8598 const void *ppc_vsx,
8601 char *note_name = "LINUX";
8602 return elfcore_write_note (abfd, buf, bufsiz,
8603 note_name, NT_PPC_VSX, ppc_vsx, size);
8607 elfcore_write_register_note (bfd *abfd,
8610 const char *section,
8614 if (strcmp (section, ".reg2") == 0)
8615 return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size);
8616 if (strcmp (section, ".reg-xfp") == 0)
8617 return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
8618 if (strcmp (section, ".reg-ppc-vmx") == 0)
8619 return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
8620 if (strcmp (section, ".reg-ppc-vsx") == 0)
8621 return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size);
8626 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
8631 while (p < buf + size)
8633 /* FIXME: bad alignment assumption. */
8634 Elf_External_Note *xnp = (Elf_External_Note *) p;
8635 Elf_Internal_Note in;
8637 if (offsetof (Elf_External_Note, name) > buf - p + size)
8640 in.type = H_GET_32 (abfd, xnp->type);
8642 in.namesz = H_GET_32 (abfd, xnp->namesz);
8643 in.namedata = xnp->name;
8644 if (in.namesz > buf - in.namedata + size)
8647 in.descsz = H_GET_32 (abfd, xnp->descsz);
8648 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
8649 in.descpos = offset + (in.descdata - buf);
8651 && (in.descdata >= buf + size
8652 || in.descsz > buf - in.descdata + size))
8655 switch (bfd_get_format (abfd))
8661 if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
8663 if (! elfcore_grok_netbsd_note (abfd, &in))
8666 else if (CONST_STRNEQ (in.namedata, "OpenBSD"))
8668 if (! elfcore_grok_openbsd_note (abfd, &in))
8671 else if (CONST_STRNEQ (in.namedata, "QNX"))
8673 if (! elfcore_grok_nto_note (abfd, &in))
8676 else if (CONST_STRNEQ (in.namedata, "SPU/"))
8678 if (! elfcore_grok_spu_note (abfd, &in))
8683 if (! elfcore_grok_note (abfd, &in))
8689 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
8691 if (! elfobj_grok_gnu_note (abfd, &in))
8697 p = in.descdata + BFD_ALIGN (in.descsz, 4);
8704 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
8711 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
8714 buf = bfd_malloc (size);
8718 if (bfd_bread (buf, size, abfd) != size
8719 || !elf_parse_notes (abfd, buf, size, offset))
8729 /* Providing external access to the ELF program header table. */
8731 /* Return an upper bound on the number of bytes required to store a
8732 copy of ABFD's program header table entries. Return -1 if an error
8733 occurs; bfd_get_error will return an appropriate code. */
8736 bfd_get_elf_phdr_upper_bound (bfd *abfd)
8738 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8740 bfd_set_error (bfd_error_wrong_format);
8744 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
8747 /* Copy ABFD's program header table entries to *PHDRS. The entries
8748 will be stored as an array of Elf_Internal_Phdr structures, as
8749 defined in include/elf/internal.h. To find out how large the
8750 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8752 Return the number of program header table entries read, or -1 if an
8753 error occurs; bfd_get_error will return an appropriate code. */
8756 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
8760 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8762 bfd_set_error (bfd_error_wrong_format);
8766 num_phdrs = elf_elfheader (abfd)->e_phnum;
8767 memcpy (phdrs, elf_tdata (abfd)->phdr,
8768 num_phdrs * sizeof (Elf_Internal_Phdr));
8773 enum elf_reloc_type_class
8774 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
8776 return reloc_class_normal;
8779 /* For RELA architectures, return the relocation value for a
8780 relocation against a local symbol. */
8783 _bfd_elf_rela_local_sym (bfd *abfd,
8784 Elf_Internal_Sym *sym,
8786 Elf_Internal_Rela *rel)
8788 asection *sec = *psec;
8791 relocation = (sec->output_section->vma
8792 + sec->output_offset
8794 if ((sec->flags & SEC_MERGE)
8795 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
8796 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
8799 _bfd_merged_section_offset (abfd, psec,
8800 elf_section_data (sec)->sec_info,
8801 sym->st_value + rel->r_addend);
8804 /* If we have changed the section, and our original section is
8805 marked with SEC_EXCLUDE, it means that the original
8806 SEC_MERGE section has been completely subsumed in some
8807 other SEC_MERGE section. In this case, we need to leave
8808 some info around for --emit-relocs. */
8809 if ((sec->flags & SEC_EXCLUDE) != 0)
8810 sec->kept_section = *psec;
8813 rel->r_addend -= relocation;
8814 rel->r_addend += sec->output_section->vma + sec->output_offset;
8820 _bfd_elf_rel_local_sym (bfd *abfd,
8821 Elf_Internal_Sym *sym,
8825 asection *sec = *psec;
8827 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
8828 return sym->st_value + addend;
8830 return _bfd_merged_section_offset (abfd, psec,
8831 elf_section_data (sec)->sec_info,
8832 sym->st_value + addend);
8836 _bfd_elf_section_offset (bfd *abfd,
8837 struct bfd_link_info *info,
8841 switch (sec->sec_info_type)
8843 case ELF_INFO_TYPE_STABS:
8844 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
8846 case ELF_INFO_TYPE_EH_FRAME:
8847 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
8853 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8854 reconstruct an ELF file by reading the segments out of remote memory
8855 based on the ELF file header at EHDR_VMA and the ELF program headers it
8856 points to. If not null, *LOADBASEP is filled in with the difference
8857 between the VMAs from which the segments were read, and the VMAs the
8858 file headers (and hence BFD's idea of each section's VMA) put them at.
8860 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8861 remote memory at target address VMA into the local buffer at MYADDR; it
8862 should return zero on success or an `errno' code on failure. TEMPL must
8863 be a BFD for an ELF target with the word size and byte order found in
8864 the remote memory. */
8867 bfd_elf_bfd_from_remote_memory
8871 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
8873 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
8874 (templ, ehdr_vma, loadbasep, target_read_memory);
8878 _bfd_elf_get_synthetic_symtab (bfd *abfd,
8879 long symcount ATTRIBUTE_UNUSED,
8880 asymbol **syms ATTRIBUTE_UNUSED,
8885 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8888 const char *relplt_name;
8889 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8893 Elf_Internal_Shdr *hdr;
8899 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
8902 if (dynsymcount <= 0)
8905 if (!bed->plt_sym_val)
8908 relplt_name = bed->relplt_name;
8909 if (relplt_name == NULL)
8910 relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt";
8911 relplt = bfd_get_section_by_name (abfd, relplt_name);
8915 hdr = &elf_section_data (relplt)->this_hdr;
8916 if (hdr->sh_link != elf_dynsymtab (abfd)
8917 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
8920 plt = bfd_get_section_by_name (abfd, ".plt");
8924 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8925 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
8928 count = relplt->size / hdr->sh_entsize;
8929 size = count * sizeof (asymbol);
8930 p = relplt->relocation;
8931 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
8933 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
8937 size += sizeof ("+0x") - 1 + 8 + 8 * (bed->s->elfclass == ELFCLASS64);
8939 size += sizeof ("+0x") - 1 + 8;
8944 s = *ret = bfd_malloc (size);
8948 names = (char *) (s + count);
8949 p = relplt->relocation;
8951 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
8956 addr = bed->plt_sym_val (i, plt, p);
8957 if (addr == (bfd_vma) -1)
8960 *s = **p->sym_ptr_ptr;
8961 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8962 we are defining a symbol, ensure one of them is set. */
8963 if ((s->flags & BSF_LOCAL) == 0)
8964 s->flags |= BSF_GLOBAL;
8965 s->flags |= BSF_SYNTHETIC;
8967 s->value = addr - plt->vma;
8970 len = strlen ((*p->sym_ptr_ptr)->name);
8971 memcpy (names, (*p->sym_ptr_ptr)->name, len);
8977 memcpy (names, "+0x", sizeof ("+0x") - 1);
8978 names += sizeof ("+0x") - 1;
8979 bfd_sprintf_vma (abfd, buf, p->addend);
8980 for (a = buf; *a == '0'; ++a)
8983 memcpy (names, a, len);
8986 memcpy (names, "@plt", sizeof ("@plt"));
8987 names += sizeof ("@plt");
8994 /* It is only used by x86-64 so far. */
8995 asection _bfd_elf_large_com_section
8996 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
8997 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
9000 _bfd_elf_set_osabi (bfd * abfd,
9001 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
9003 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
9005 i_ehdrp = elf_elfheader (abfd);
9007 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
9009 /* To make things simpler for the loader on Linux systems we set the
9010 osabi field to ELFOSABI_LINUX if the binary contains symbols of
9011 the STT_GNU_IFUNC type. */
9012 if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE
9013 && elf_tdata (abfd)->has_ifunc_symbols)
9014 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX;
9018 /* Return TRUE for ELF symbol types that represent functions.
9019 This is the default version of this function, which is sufficient for
9020 most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */
9023 _bfd_elf_is_function_type (unsigned int type)
9025 return (type == STT_FUNC
9026 || type == STT_GNU_IFUNC);