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 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
28 BFD support for ELF formats is being worked on.
29 Currently, the best supported back ends are for sparc and i386
30 (running svr4 or Solaris 2).
32 Documentation of the internals of the support code still needs
33 to be written. The code is changing quickly enough that we
34 haven't bothered yet. */
36 /* For sparc64-cross-sparc32. */
44 #include "libiberty.h"
45 #include "safe-ctype.h"
47 static int elf_sort_sections (const void *, const void *);
48 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
49 static bfd_boolean prep_headers (bfd *);
50 static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
51 static bfd_boolean elf_read_notes (bfd *, file_ptr, bfd_size_type) ;
52 static bfd_boolean elf_parse_notes (bfd *abfd, char *buf, size_t size,
55 /* Swap version information in and out. The version information is
56 currently size independent. If that ever changes, this code will
57 need to move into elfcode.h. */
59 /* Swap in a Verdef structure. */
62 _bfd_elf_swap_verdef_in (bfd *abfd,
63 const Elf_External_Verdef *src,
64 Elf_Internal_Verdef *dst)
66 dst->vd_version = H_GET_16 (abfd, src->vd_version);
67 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
68 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
69 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
70 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
71 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
72 dst->vd_next = H_GET_32 (abfd, src->vd_next);
75 /* Swap out a Verdef structure. */
78 _bfd_elf_swap_verdef_out (bfd *abfd,
79 const Elf_Internal_Verdef *src,
80 Elf_External_Verdef *dst)
82 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
83 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
84 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
85 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
86 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
87 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
88 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
91 /* Swap in a Verdaux structure. */
94 _bfd_elf_swap_verdaux_in (bfd *abfd,
95 const Elf_External_Verdaux *src,
96 Elf_Internal_Verdaux *dst)
98 dst->vda_name = H_GET_32 (abfd, src->vda_name);
99 dst->vda_next = H_GET_32 (abfd, src->vda_next);
102 /* Swap out a Verdaux structure. */
105 _bfd_elf_swap_verdaux_out (bfd *abfd,
106 const Elf_Internal_Verdaux *src,
107 Elf_External_Verdaux *dst)
109 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
110 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
113 /* Swap in a Verneed structure. */
116 _bfd_elf_swap_verneed_in (bfd *abfd,
117 const Elf_External_Verneed *src,
118 Elf_Internal_Verneed *dst)
120 dst->vn_version = H_GET_16 (abfd, src->vn_version);
121 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
122 dst->vn_file = H_GET_32 (abfd, src->vn_file);
123 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
124 dst->vn_next = H_GET_32 (abfd, src->vn_next);
127 /* Swap out a Verneed structure. */
130 _bfd_elf_swap_verneed_out (bfd *abfd,
131 const Elf_Internal_Verneed *src,
132 Elf_External_Verneed *dst)
134 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
135 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
136 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
137 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
138 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
141 /* Swap in a Vernaux structure. */
144 _bfd_elf_swap_vernaux_in (bfd *abfd,
145 const Elf_External_Vernaux *src,
146 Elf_Internal_Vernaux *dst)
148 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
149 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
150 dst->vna_other = H_GET_16 (abfd, src->vna_other);
151 dst->vna_name = H_GET_32 (abfd, src->vna_name);
152 dst->vna_next = H_GET_32 (abfd, src->vna_next);
155 /* Swap out a Vernaux structure. */
158 _bfd_elf_swap_vernaux_out (bfd *abfd,
159 const Elf_Internal_Vernaux *src,
160 Elf_External_Vernaux *dst)
162 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
163 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
164 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
165 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
166 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
169 /* Swap in a Versym structure. */
172 _bfd_elf_swap_versym_in (bfd *abfd,
173 const Elf_External_Versym *src,
174 Elf_Internal_Versym *dst)
176 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
179 /* Swap out a Versym structure. */
182 _bfd_elf_swap_versym_out (bfd *abfd,
183 const Elf_Internal_Versym *src,
184 Elf_External_Versym *dst)
186 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
189 /* Standard ELF hash function. Do not change this function; you will
190 cause invalid hash tables to be generated. */
193 bfd_elf_hash (const char *namearg)
195 const unsigned char *name = (const unsigned char *) namearg;
200 while ((ch = *name++) != '\0')
203 if ((g = (h & 0xf0000000)) != 0)
206 /* The ELF ABI says `h &= ~g', but this is equivalent in
207 this case and on some machines one insn instead of two. */
211 return h & 0xffffffff;
214 /* DT_GNU_HASH hash function. Do not change this function; you will
215 cause invalid hash tables to be generated. */
218 bfd_elf_gnu_hash (const char *namearg)
220 const unsigned char *name = (const unsigned char *) namearg;
221 unsigned long h = 5381;
224 while ((ch = *name++) != '\0')
225 h = (h << 5) + h + ch;
226 return h & 0xffffffff;
229 /* Create a tdata field OBJECT_SIZE bytes in length, zeroed out and with
230 the object_id field of an elf_obj_tdata field set to OBJECT_ID. */
232 bfd_elf_allocate_object (bfd *abfd,
234 enum elf_object_id object_id)
236 BFD_ASSERT (object_size >= sizeof (struct elf_obj_tdata));
237 abfd->tdata.any = bfd_zalloc (abfd, object_size);
238 if (abfd->tdata.any == NULL)
241 elf_object_id (abfd) = object_id;
242 elf_program_header_size (abfd) = (bfd_size_type) -1;
248 bfd_elf_make_generic_object (bfd *abfd)
250 return bfd_elf_allocate_object (abfd, sizeof (struct elf_obj_tdata),
255 bfd_elf_mkcorefile (bfd *abfd)
257 /* I think this can be done just like an object file. */
258 return bfd_elf_make_generic_object (abfd);
262 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
264 Elf_Internal_Shdr **i_shdrp;
265 bfd_byte *shstrtab = NULL;
267 bfd_size_type shstrtabsize;
269 i_shdrp = elf_elfsections (abfd);
271 || shindex >= elf_numsections (abfd)
272 || i_shdrp[shindex] == 0)
275 shstrtab = i_shdrp[shindex]->contents;
276 if (shstrtab == NULL)
278 /* No cached one, attempt to read, and cache what we read. */
279 offset = i_shdrp[shindex]->sh_offset;
280 shstrtabsize = i_shdrp[shindex]->sh_size;
282 /* Allocate and clear an extra byte at the end, to prevent crashes
283 in case the string table is not terminated. */
284 if (shstrtabsize + 1 <= 1
285 || (shstrtab = bfd_alloc (abfd, shstrtabsize + 1)) == NULL
286 || bfd_seek (abfd, offset, SEEK_SET) != 0)
288 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
290 if (bfd_get_error () != bfd_error_system_call)
291 bfd_set_error (bfd_error_file_truncated);
293 /* Once we've failed to read it, make sure we don't keep
294 trying. Otherwise, we'll keep allocating space for
295 the string table over and over. */
296 i_shdrp[shindex]->sh_size = 0;
299 shstrtab[shstrtabsize] = '\0';
300 i_shdrp[shindex]->contents = shstrtab;
302 return (char *) shstrtab;
306 bfd_elf_string_from_elf_section (bfd *abfd,
307 unsigned int shindex,
308 unsigned int strindex)
310 Elf_Internal_Shdr *hdr;
315 if (elf_elfsections (abfd) == NULL || shindex >= elf_numsections (abfd))
318 hdr = elf_elfsections (abfd)[shindex];
320 if (hdr->contents == NULL
321 && bfd_elf_get_str_section (abfd, shindex) == NULL)
324 if (strindex >= hdr->sh_size)
326 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
327 (*_bfd_error_handler)
328 (_("%B: invalid string offset %u >= %lu for section `%s'"),
329 abfd, strindex, (unsigned long) hdr->sh_size,
330 (shindex == shstrndx && strindex == hdr->sh_name
332 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
336 return ((char *) hdr->contents) + strindex;
339 /* Read and convert symbols to internal format.
340 SYMCOUNT specifies the number of symbols to read, starting from
341 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
342 are non-NULL, they are used to store the internal symbols, external
343 symbols, and symbol section index extensions, respectively.
344 Returns a pointer to the internal symbol buffer (malloced if necessary)
345 or NULL if there were no symbols or some kind of problem. */
348 bfd_elf_get_elf_syms (bfd *ibfd,
349 Elf_Internal_Shdr *symtab_hdr,
352 Elf_Internal_Sym *intsym_buf,
354 Elf_External_Sym_Shndx *extshndx_buf)
356 Elf_Internal_Shdr *shndx_hdr;
358 const bfd_byte *esym;
359 Elf_External_Sym_Shndx *alloc_extshndx;
360 Elf_External_Sym_Shndx *shndx;
361 Elf_Internal_Sym *alloc_intsym;
362 Elf_Internal_Sym *isym;
363 Elf_Internal_Sym *isymend;
364 const struct elf_backend_data *bed;
369 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
375 /* Normal syms might have section extension entries. */
377 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
378 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
380 /* Read the symbols. */
382 alloc_extshndx = NULL;
384 bed = get_elf_backend_data (ibfd);
385 extsym_size = bed->s->sizeof_sym;
386 amt = symcount * extsym_size;
387 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
388 if (extsym_buf == NULL)
390 alloc_ext = bfd_malloc2 (symcount, extsym_size);
391 extsym_buf = alloc_ext;
393 if (extsym_buf == NULL
394 || bfd_seek (ibfd, pos, SEEK_SET) != 0
395 || bfd_bread (extsym_buf, amt, ibfd) != amt)
401 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
405 amt = symcount * sizeof (Elf_External_Sym_Shndx);
406 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
407 if (extshndx_buf == NULL)
409 alloc_extshndx = bfd_malloc2 (symcount,
410 sizeof (Elf_External_Sym_Shndx));
411 extshndx_buf = alloc_extshndx;
413 if (extshndx_buf == NULL
414 || bfd_seek (ibfd, pos, SEEK_SET) != 0
415 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
422 if (intsym_buf == NULL)
424 alloc_intsym = bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
425 intsym_buf = alloc_intsym;
426 if (intsym_buf == NULL)
430 /* Convert the symbols to internal form. */
431 isymend = intsym_buf + symcount;
432 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
434 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
435 if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym))
437 symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size;
438 (*_bfd_error_handler) (_("%B symbol number %lu references "
439 "nonexistent SHT_SYMTAB_SHNDX section"),
440 ibfd, (unsigned long) symoffset);
441 if (alloc_intsym != NULL)
448 if (alloc_ext != NULL)
450 if (alloc_extshndx != NULL)
451 free (alloc_extshndx);
456 /* Look up a symbol name. */
458 bfd_elf_sym_name (bfd *abfd,
459 Elf_Internal_Shdr *symtab_hdr,
460 Elf_Internal_Sym *isym,
464 unsigned int iname = isym->st_name;
465 unsigned int shindex = symtab_hdr->sh_link;
467 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
468 /* Check for a bogus st_shndx to avoid crashing. */
469 && isym->st_shndx < elf_numsections (abfd))
471 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
472 shindex = elf_elfheader (abfd)->e_shstrndx;
475 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
478 else if (sym_sec && *name == '\0')
479 name = bfd_section_name (abfd, sym_sec);
484 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
485 sections. The first element is the flags, the rest are section
488 typedef union elf_internal_group {
489 Elf_Internal_Shdr *shdr;
491 } Elf_Internal_Group;
493 /* Return the name of the group signature symbol. Why isn't the
494 signature just a string? */
497 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
499 Elf_Internal_Shdr *hdr;
500 unsigned char esym[sizeof (Elf64_External_Sym)];
501 Elf_External_Sym_Shndx eshndx;
502 Elf_Internal_Sym isym;
504 /* First we need to ensure the symbol table is available. Make sure
505 that it is a symbol table section. */
506 if (ghdr->sh_link >= elf_numsections (abfd))
508 hdr = elf_elfsections (abfd) [ghdr->sh_link];
509 if (hdr->sh_type != SHT_SYMTAB
510 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
513 /* Go read the symbol. */
514 hdr = &elf_tdata (abfd)->symtab_hdr;
515 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
516 &isym, esym, &eshndx) == NULL)
519 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
522 /* Set next_in_group list pointer, and group name for NEWSECT. */
525 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
527 unsigned int num_group = elf_tdata (abfd)->num_group;
529 /* If num_group is zero, read in all SHT_GROUP sections. The count
530 is set to -1 if there are no SHT_GROUP sections. */
533 unsigned int i, shnum;
535 /* First count the number of groups. If we have a SHT_GROUP
536 section with just a flag word (ie. sh_size is 4), ignore it. */
537 shnum = elf_numsections (abfd);
540 #define IS_VALID_GROUP_SECTION_HEADER(shdr) \
541 ( (shdr)->sh_type == SHT_GROUP \
542 && (shdr)->sh_size >= (2 * GRP_ENTRY_SIZE) \
543 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
544 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
546 for (i = 0; i < shnum; i++)
548 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
550 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
556 num_group = (unsigned) -1;
557 elf_tdata (abfd)->num_group = num_group;
561 /* We keep a list of elf section headers for group sections,
562 so we can find them quickly. */
565 elf_tdata (abfd)->num_group = num_group;
566 elf_tdata (abfd)->group_sect_ptr
567 = bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
568 if (elf_tdata (abfd)->group_sect_ptr == NULL)
572 for (i = 0; i < shnum; i++)
574 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
576 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
579 Elf_Internal_Group *dest;
581 /* Add to list of sections. */
582 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
585 /* Read the raw contents. */
586 BFD_ASSERT (sizeof (*dest) >= 4);
587 amt = shdr->sh_size * sizeof (*dest) / 4;
588 shdr->contents = bfd_alloc2 (abfd, shdr->sh_size,
590 /* PR binutils/4110: Handle corrupt group headers. */
591 if (shdr->contents == NULL)
594 (_("%B: Corrupt size field in group section header: 0x%lx"), abfd, shdr->sh_size);
595 bfd_set_error (bfd_error_bad_value);
599 memset (shdr->contents, 0, amt);
601 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
602 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
606 /* Translate raw contents, a flag word followed by an
607 array of elf section indices all in target byte order,
608 to the flag word followed by an array of elf section
610 src = shdr->contents + shdr->sh_size;
611 dest = (Elf_Internal_Group *) (shdr->contents + amt);
618 idx = H_GET_32 (abfd, src);
619 if (src == shdr->contents)
622 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
623 shdr->bfd_section->flags
624 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
629 ((*_bfd_error_handler)
630 (_("%B: invalid SHT_GROUP entry"), abfd));
633 dest->shdr = elf_elfsections (abfd)[idx];
640 if (num_group != (unsigned) -1)
644 for (i = 0; i < num_group; i++)
646 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
647 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
648 unsigned int n_elt = shdr->sh_size / 4;
650 /* Look through this group's sections to see if current
651 section is a member. */
653 if ((++idx)->shdr == hdr)
657 /* We are a member of this group. Go looking through
658 other members to see if any others are linked via
660 idx = (Elf_Internal_Group *) shdr->contents;
661 n_elt = shdr->sh_size / 4;
663 if ((s = (++idx)->shdr->bfd_section) != NULL
664 && elf_next_in_group (s) != NULL)
668 /* Snarf the group name from other member, and
669 insert current section in circular list. */
670 elf_group_name (newsect) = elf_group_name (s);
671 elf_next_in_group (newsect) = elf_next_in_group (s);
672 elf_next_in_group (s) = newsect;
678 gname = group_signature (abfd, shdr);
681 elf_group_name (newsect) = gname;
683 /* Start a circular list with one element. */
684 elf_next_in_group (newsect) = newsect;
687 /* If the group section has been created, point to the
689 if (shdr->bfd_section != NULL)
690 elf_next_in_group (shdr->bfd_section) = newsect;
698 if (elf_group_name (newsect) == NULL)
700 (*_bfd_error_handler) (_("%B: no group info for section %A"),
707 _bfd_elf_setup_sections (bfd *abfd)
710 unsigned int num_group = elf_tdata (abfd)->num_group;
711 bfd_boolean result = TRUE;
714 /* Process SHF_LINK_ORDER. */
715 for (s = abfd->sections; s != NULL; s = s->next)
717 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
718 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
720 unsigned int elfsec = this_hdr->sh_link;
721 /* FIXME: The old Intel compiler and old strip/objcopy may
722 not set the sh_link or sh_info fields. Hence we could
723 get the situation where elfsec is 0. */
726 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
727 if (bed->link_order_error_handler)
728 bed->link_order_error_handler
729 (_("%B: warning: sh_link not set for section `%A'"),
734 asection *link = NULL;
736 if (elfsec < elf_numsections (abfd))
738 this_hdr = elf_elfsections (abfd)[elfsec];
739 link = this_hdr->bfd_section;
743 Some strip/objcopy may leave an incorrect value in
744 sh_link. We don't want to proceed. */
747 (*_bfd_error_handler)
748 (_("%B: sh_link [%d] in section `%A' is incorrect"),
749 s->owner, s, elfsec);
753 elf_linked_to_section (s) = link;
758 /* Process section groups. */
759 if (num_group == (unsigned) -1)
762 for (i = 0; i < num_group; i++)
764 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
765 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
766 unsigned int n_elt = shdr->sh_size / 4;
769 if ((++idx)->shdr->bfd_section)
770 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
771 else if (idx->shdr->sh_type == SHT_RELA
772 || idx->shdr->sh_type == SHT_REL)
773 /* We won't include relocation sections in section groups in
774 output object files. We adjust the group section size here
775 so that relocatable link will work correctly when
776 relocation sections are in section group in input object
778 shdr->bfd_section->size -= 4;
781 /* There are some unknown sections in the group. */
782 (*_bfd_error_handler)
783 (_("%B: unknown [%d] section `%s' in group [%s]"),
785 (unsigned int) idx->shdr->sh_type,
786 bfd_elf_string_from_elf_section (abfd,
787 (elf_elfheader (abfd)
790 shdr->bfd_section->name);
798 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
800 return elf_next_in_group (sec) != NULL;
803 /* Make a BFD section from an ELF section. We store a pointer to the
804 BFD section in the bfd_section field of the header. */
807 _bfd_elf_make_section_from_shdr (bfd *abfd,
808 Elf_Internal_Shdr *hdr,
814 const struct elf_backend_data *bed;
816 if (hdr->bfd_section != NULL)
818 BFD_ASSERT (strcmp (name,
819 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
823 newsect = bfd_make_section_anyway (abfd, name);
827 hdr->bfd_section = newsect;
828 elf_section_data (newsect)->this_hdr = *hdr;
829 elf_section_data (newsect)->this_idx = shindex;
831 /* Always use the real type/flags. */
832 elf_section_type (newsect) = hdr->sh_type;
833 elf_section_flags (newsect) = hdr->sh_flags;
835 newsect->filepos = hdr->sh_offset;
837 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
838 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
839 || ! bfd_set_section_alignment (abfd, newsect,
840 bfd_log2 (hdr->sh_addralign)))
843 flags = SEC_NO_FLAGS;
844 if (hdr->sh_type != SHT_NOBITS)
845 flags |= SEC_HAS_CONTENTS;
846 if (hdr->sh_type == SHT_GROUP)
847 flags |= SEC_GROUP | SEC_EXCLUDE;
848 if ((hdr->sh_flags & SHF_ALLOC) != 0)
851 if (hdr->sh_type != SHT_NOBITS)
854 if ((hdr->sh_flags & SHF_WRITE) == 0)
855 flags |= SEC_READONLY;
856 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
858 else if ((flags & SEC_LOAD) != 0)
860 if ((hdr->sh_flags & SHF_MERGE) != 0)
863 newsect->entsize = hdr->sh_entsize;
864 if ((hdr->sh_flags & SHF_STRINGS) != 0)
865 flags |= SEC_STRINGS;
867 if (hdr->sh_flags & SHF_GROUP)
868 if (!setup_group (abfd, hdr, newsect))
870 if ((hdr->sh_flags & SHF_TLS) != 0)
871 flags |= SEC_THREAD_LOCAL;
873 if ((flags & SEC_ALLOC) == 0)
875 /* The debugging sections appear to be recognized only by name,
876 not any sort of flag. Their SEC_ALLOC bits are cleared. */
881 } debug_sections [] =
883 { STRING_COMMA_LEN ("debug") }, /* 'd' */
884 { NULL, 0 }, /* 'e' */
885 { NULL, 0 }, /* 'f' */
886 { STRING_COMMA_LEN ("gnu.linkonce.wi.") }, /* 'g' */
887 { NULL, 0 }, /* 'h' */
888 { NULL, 0 }, /* 'i' */
889 { NULL, 0 }, /* 'j' */
890 { NULL, 0 }, /* 'k' */
891 { STRING_COMMA_LEN ("line") }, /* 'l' */
892 { NULL, 0 }, /* 'm' */
893 { NULL, 0 }, /* 'n' */
894 { NULL, 0 }, /* 'o' */
895 { NULL, 0 }, /* 'p' */
896 { NULL, 0 }, /* 'q' */
897 { NULL, 0 }, /* 'r' */
898 { STRING_COMMA_LEN ("stab") }, /* 's' */
899 { NULL, 0 }, /* 't' */
900 { NULL, 0 }, /* 'u' */
901 { NULL, 0 }, /* 'v' */
902 { NULL, 0 }, /* 'w' */
903 { NULL, 0 }, /* 'x' */
904 { NULL, 0 }, /* 'y' */
905 { STRING_COMMA_LEN ("zdebug") } /* 'z' */
910 int i = name [1] - 'd';
912 && i < (int) ARRAY_SIZE (debug_sections)
913 && debug_sections [i].name != NULL
914 && strncmp (&name [1], debug_sections [i].name,
915 debug_sections [i].len) == 0)
916 flags |= SEC_DEBUGGING;
920 /* As a GNU extension, if the name begins with .gnu.linkonce, we
921 only link a single copy of the section. This is used to support
922 g++. g++ will emit each template expansion in its own section.
923 The symbols will be defined as weak, so that multiple definitions
924 are permitted. The GNU linker extension is to actually discard
925 all but one of the sections. */
926 if (CONST_STRNEQ (name, ".gnu.linkonce")
927 && elf_next_in_group (newsect) == NULL)
928 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
930 bed = get_elf_backend_data (abfd);
931 if (bed->elf_backend_section_flags)
932 if (! bed->elf_backend_section_flags (&flags, hdr))
935 if (! bfd_set_section_flags (abfd, newsect, flags))
938 /* We do not parse the PT_NOTE segments as we are interested even in the
939 separate debug info files which may have the segments offsets corrupted.
940 PT_NOTEs from the core files are currently not parsed using BFD. */
941 if (hdr->sh_type == SHT_NOTE)
945 if (!bfd_malloc_and_get_section (abfd, newsect, &contents))
948 elf_parse_notes (abfd, (char *) contents, hdr->sh_size, -1);
952 if ((flags & SEC_ALLOC) != 0)
954 Elf_Internal_Phdr *phdr;
955 unsigned int i, nload;
957 /* Some ELF linkers produce binaries with all the program header
958 p_paddr fields zero. If we have such a binary with more than
959 one PT_LOAD header, then leave the section lma equal to vma
960 so that we don't create sections with overlapping lma. */
961 phdr = elf_tdata (abfd)->phdr;
962 for (nload = 0, i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
963 if (phdr->p_paddr != 0)
965 else if (phdr->p_type == PT_LOAD && phdr->p_memsz != 0)
967 if (i >= elf_elfheader (abfd)->e_phnum && nload > 1)
970 phdr = elf_tdata (abfd)->phdr;
971 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
973 /* This section is part of this segment if its file
974 offset plus size lies within the segment's memory
975 span and, if the section is loaded, the extent of the
976 loaded data lies within the extent of the segment.
978 Note - we used to check the p_paddr field as well, and
979 refuse to set the LMA if it was 0. This is wrong
980 though, as a perfectly valid initialised segment can
981 have a p_paddr of zero. Some architectures, eg ARM,
982 place special significance on the address 0 and
983 executables need to be able to have a segment which
984 covers this address. */
985 if (phdr->p_type == PT_LOAD
986 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
987 && (hdr->sh_offset + hdr->sh_size
988 <= phdr->p_offset + phdr->p_memsz)
989 && ((flags & SEC_LOAD) == 0
990 || (hdr->sh_offset + hdr->sh_size
991 <= phdr->p_offset + phdr->p_filesz)))
993 if ((flags & SEC_LOAD) == 0)
994 newsect->lma = (phdr->p_paddr
995 + hdr->sh_addr - phdr->p_vaddr);
997 /* We used to use the same adjustment for SEC_LOAD
998 sections, but that doesn't work if the segment
999 is packed with code from multiple VMAs.
1000 Instead we calculate the section LMA based on
1001 the segment LMA. It is assumed that the
1002 segment will contain sections with contiguous
1003 LMAs, even if the VMAs are not. */
1004 newsect->lma = (phdr->p_paddr
1005 + hdr->sh_offset - phdr->p_offset);
1007 /* With contiguous segments, we can't tell from file
1008 offsets whether a section with zero size should
1009 be placed at the end of one segment or the
1010 beginning of the next. Decide based on vaddr. */
1011 if (hdr->sh_addr >= phdr->p_vaddr
1012 && (hdr->sh_addr + hdr->sh_size
1013 <= phdr->p_vaddr + phdr->p_memsz))
1024 bfd_elf_find_section
1027 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
1030 Helper functions for GDB to locate the string tables.
1031 Since BFD hides string tables from callers, GDB needs to use an
1032 internal hook to find them. Sun's .stabstr, in particular,
1033 isn't even pointed to by the .stab section, so ordinary
1034 mechanisms wouldn't work to find it, even if we had some.
1037 struct elf_internal_shdr *
1038 bfd_elf_find_section (bfd *abfd, char *name)
1040 Elf_Internal_Shdr **i_shdrp;
1045 i_shdrp = elf_elfsections (abfd);
1046 if (i_shdrp != NULL)
1048 shstrtab = bfd_elf_get_str_section (abfd,
1049 elf_elfheader (abfd)->e_shstrndx);
1050 if (shstrtab != NULL)
1052 max = elf_numsections (abfd);
1053 for (i = 1; i < max; i++)
1054 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
1061 const char *const bfd_elf_section_type_names[] = {
1062 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1063 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1064 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1067 /* ELF relocs are against symbols. If we are producing relocatable
1068 output, and the reloc is against an external symbol, and nothing
1069 has given us any additional addend, the resulting reloc will also
1070 be against the same symbol. In such a case, we don't want to
1071 change anything about the way the reloc is handled, since it will
1072 all be done at final link time. Rather than put special case code
1073 into bfd_perform_relocation, all the reloc types use this howto
1074 function. It just short circuits the reloc if producing
1075 relocatable output against an external symbol. */
1077 bfd_reloc_status_type
1078 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1079 arelent *reloc_entry,
1081 void *data ATTRIBUTE_UNUSED,
1082 asection *input_section,
1084 char **error_message ATTRIBUTE_UNUSED)
1086 if (output_bfd != NULL
1087 && (symbol->flags & BSF_SECTION_SYM) == 0
1088 && (! reloc_entry->howto->partial_inplace
1089 || reloc_entry->addend == 0))
1091 reloc_entry->address += input_section->output_offset;
1092 return bfd_reloc_ok;
1095 return bfd_reloc_continue;
1098 /* Copy the program header and other data from one object module to
1102 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1104 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1105 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1108 BFD_ASSERT (!elf_flags_init (obfd)
1109 || (elf_elfheader (obfd)->e_flags
1110 == elf_elfheader (ibfd)->e_flags));
1112 elf_gp (obfd) = elf_gp (ibfd);
1113 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1114 elf_flags_init (obfd) = TRUE;
1116 /* Copy object attributes. */
1117 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1123 get_segment_type (unsigned int p_type)
1128 case PT_NULL: pt = "NULL"; break;
1129 case PT_LOAD: pt = "LOAD"; break;
1130 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1131 case PT_INTERP: pt = "INTERP"; break;
1132 case PT_NOTE: pt = "NOTE"; break;
1133 case PT_SHLIB: pt = "SHLIB"; break;
1134 case PT_PHDR: pt = "PHDR"; break;
1135 case PT_TLS: pt = "TLS"; break;
1136 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1137 case PT_GNU_STACK: pt = "STACK"; break;
1138 case PT_GNU_RELRO: pt = "RELRO"; break;
1139 default: pt = NULL; break;
1144 /* Print out the program headers. */
1147 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1150 Elf_Internal_Phdr *p;
1152 bfd_byte *dynbuf = NULL;
1154 p = elf_tdata (abfd)->phdr;
1159 fprintf (f, _("\nProgram Header:\n"));
1160 c = elf_elfheader (abfd)->e_phnum;
1161 for (i = 0; i < c; i++, p++)
1163 const char *pt = get_segment_type (p->p_type);
1168 sprintf (buf, "0x%lx", p->p_type);
1171 fprintf (f, "%8s off 0x", pt);
1172 bfd_fprintf_vma (abfd, f, p->p_offset);
1173 fprintf (f, " vaddr 0x");
1174 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1175 fprintf (f, " paddr 0x");
1176 bfd_fprintf_vma (abfd, f, p->p_paddr);
1177 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1178 fprintf (f, " filesz 0x");
1179 bfd_fprintf_vma (abfd, f, p->p_filesz);
1180 fprintf (f, " memsz 0x");
1181 bfd_fprintf_vma (abfd, f, p->p_memsz);
1182 fprintf (f, " flags %c%c%c",
1183 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1184 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1185 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1186 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1187 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1192 s = bfd_get_section_by_name (abfd, ".dynamic");
1195 unsigned int elfsec;
1196 unsigned long shlink;
1197 bfd_byte *extdyn, *extdynend;
1199 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1201 fprintf (f, _("\nDynamic Section:\n"));
1203 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1206 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1207 if (elfsec == SHN_BAD)
1209 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1211 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1212 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1215 extdynend = extdyn + s->size;
1216 for (; extdyn < extdynend; extdyn += extdynsize)
1218 Elf_Internal_Dyn dyn;
1219 const char *name = "";
1221 bfd_boolean stringp;
1222 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1224 (*swap_dyn_in) (abfd, extdyn, &dyn);
1226 if (dyn.d_tag == DT_NULL)
1233 if (bed->elf_backend_get_target_dtag)
1234 name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag);
1236 if (!strcmp (name, ""))
1238 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1243 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1244 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1245 case DT_PLTGOT: name = "PLTGOT"; break;
1246 case DT_HASH: name = "HASH"; break;
1247 case DT_STRTAB: name = "STRTAB"; break;
1248 case DT_SYMTAB: name = "SYMTAB"; break;
1249 case DT_RELA: name = "RELA"; break;
1250 case DT_RELASZ: name = "RELASZ"; break;
1251 case DT_RELAENT: name = "RELAENT"; break;
1252 case DT_STRSZ: name = "STRSZ"; break;
1253 case DT_SYMENT: name = "SYMENT"; break;
1254 case DT_INIT: name = "INIT"; break;
1255 case DT_FINI: name = "FINI"; break;
1256 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1257 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1258 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1259 case DT_REL: name = "REL"; break;
1260 case DT_RELSZ: name = "RELSZ"; break;
1261 case DT_RELENT: name = "RELENT"; break;
1262 case DT_PLTREL: name = "PLTREL"; break;
1263 case DT_DEBUG: name = "DEBUG"; break;
1264 case DT_TEXTREL: name = "TEXTREL"; break;
1265 case DT_JMPREL: name = "JMPREL"; break;
1266 case DT_BIND_NOW: name = "BIND_NOW"; break;
1267 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1268 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1269 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1270 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1271 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1272 case DT_FLAGS: name = "FLAGS"; break;
1273 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1274 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1275 case DT_CHECKSUM: name = "CHECKSUM"; break;
1276 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1277 case DT_MOVEENT: name = "MOVEENT"; break;
1278 case DT_MOVESZ: name = "MOVESZ"; break;
1279 case DT_FEATURE: name = "FEATURE"; break;
1280 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1281 case DT_SYMINSZ: name = "SYMINSZ"; break;
1282 case DT_SYMINENT: name = "SYMINENT"; break;
1283 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1284 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1285 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1286 case DT_PLTPAD: name = "PLTPAD"; break;
1287 case DT_MOVETAB: name = "MOVETAB"; break;
1288 case DT_SYMINFO: name = "SYMINFO"; break;
1289 case DT_RELACOUNT: name = "RELACOUNT"; break;
1290 case DT_RELCOUNT: name = "RELCOUNT"; break;
1291 case DT_FLAGS_1: name = "FLAGS_1"; break;
1292 case DT_VERSYM: name = "VERSYM"; break;
1293 case DT_VERDEF: name = "VERDEF"; break;
1294 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1295 case DT_VERNEED: name = "VERNEED"; break;
1296 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1297 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1298 case DT_USED: name = "USED"; break;
1299 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1300 case DT_GNU_HASH: name = "GNU_HASH"; break;
1303 fprintf (f, " %-20s ", name);
1307 bfd_fprintf_vma (abfd, f, dyn.d_un.d_val);
1312 unsigned int tagv = dyn.d_un.d_val;
1314 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1317 fprintf (f, "%s", string);
1326 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1327 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1329 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1333 if (elf_dynverdef (abfd) != 0)
1335 Elf_Internal_Verdef *t;
1337 fprintf (f, _("\nVersion definitions:\n"));
1338 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1340 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1341 t->vd_flags, t->vd_hash,
1342 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1343 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1345 Elf_Internal_Verdaux *a;
1348 for (a = t->vd_auxptr->vda_nextptr;
1352 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1358 if (elf_dynverref (abfd) != 0)
1360 Elf_Internal_Verneed *t;
1362 fprintf (f, _("\nVersion References:\n"));
1363 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1365 Elf_Internal_Vernaux *a;
1367 fprintf (f, _(" required from %s:\n"),
1368 t->vn_filename ? t->vn_filename : "<corrupt>");
1369 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1370 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1371 a->vna_flags, a->vna_other,
1372 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1384 /* Display ELF-specific fields of a symbol. */
1387 bfd_elf_print_symbol (bfd *abfd,
1390 bfd_print_symbol_type how)
1395 case bfd_print_symbol_name:
1396 fprintf (file, "%s", symbol->name);
1398 case bfd_print_symbol_more:
1399 fprintf (file, "elf ");
1400 bfd_fprintf_vma (abfd, file, symbol->value);
1401 fprintf (file, " %lx", (unsigned long) symbol->flags);
1403 case bfd_print_symbol_all:
1405 const char *section_name;
1406 const char *name = NULL;
1407 const struct elf_backend_data *bed;
1408 unsigned char st_other;
1411 section_name = symbol->section ? symbol->section->name : "(*none*)";
1413 bed = get_elf_backend_data (abfd);
1414 if (bed->elf_backend_print_symbol_all)
1415 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1419 name = symbol->name;
1420 bfd_print_symbol_vandf (abfd, file, symbol);
1423 fprintf (file, " %s\t", section_name);
1424 /* Print the "other" value for a symbol. For common symbols,
1425 we've already printed the size; now print the alignment.
1426 For other symbols, we have no specified alignment, and
1427 we've printed the address; now print the size. */
1428 if (symbol->section && bfd_is_com_section (symbol->section))
1429 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1431 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1432 bfd_fprintf_vma (abfd, file, val);
1434 /* If we have version information, print it. */
1435 if (elf_tdata (abfd)->dynversym_section != 0
1436 && (elf_tdata (abfd)->dynverdef_section != 0
1437 || elf_tdata (abfd)->dynverref_section != 0))
1439 unsigned int vernum;
1440 const char *version_string;
1442 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1445 version_string = "";
1446 else if (vernum == 1)
1447 version_string = "Base";
1448 else if (vernum <= elf_tdata (abfd)->cverdefs)
1450 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1453 Elf_Internal_Verneed *t;
1455 version_string = "";
1456 for (t = elf_tdata (abfd)->verref;
1460 Elf_Internal_Vernaux *a;
1462 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1464 if (a->vna_other == vernum)
1466 version_string = a->vna_nodename;
1473 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1474 fprintf (file, " %-11s", version_string);
1479 fprintf (file, " (%s)", version_string);
1480 for (i = 10 - strlen (version_string); i > 0; --i)
1485 /* If the st_other field is not zero, print it. */
1486 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1491 case STV_INTERNAL: fprintf (file, " .internal"); break;
1492 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1493 case STV_PROTECTED: fprintf (file, " .protected"); break;
1495 /* Some other non-defined flags are also present, so print
1497 fprintf (file, " 0x%02x", (unsigned int) st_other);
1500 fprintf (file, " %s", name);
1506 /* Allocate an ELF string table--force the first byte to be zero. */
1508 struct bfd_strtab_hash *
1509 _bfd_elf_stringtab_init (void)
1511 struct bfd_strtab_hash *ret;
1513 ret = _bfd_stringtab_init ();
1518 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1519 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1520 if (loc == (bfd_size_type) -1)
1522 _bfd_stringtab_free (ret);
1529 /* ELF .o/exec file reading */
1531 /* Create a new bfd section from an ELF section header. */
1534 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1536 Elf_Internal_Shdr *hdr;
1537 Elf_Internal_Ehdr *ehdr;
1538 const struct elf_backend_data *bed;
1541 if (shindex >= elf_numsections (abfd))
1544 hdr = elf_elfsections (abfd)[shindex];
1545 ehdr = elf_elfheader (abfd);
1546 name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx,
1551 bed = get_elf_backend_data (abfd);
1552 switch (hdr->sh_type)
1555 /* Inactive section. Throw it away. */
1558 case SHT_PROGBITS: /* Normal section with contents. */
1559 case SHT_NOBITS: /* .bss section. */
1560 case SHT_HASH: /* .hash section. */
1561 case SHT_NOTE: /* .note section. */
1562 case SHT_INIT_ARRAY: /* .init_array section. */
1563 case SHT_FINI_ARRAY: /* .fini_array section. */
1564 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1565 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1566 case SHT_GNU_HASH: /* .gnu.hash section. */
1567 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1569 case SHT_DYNAMIC: /* Dynamic linking information. */
1570 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1572 if (hdr->sh_link > elf_numsections (abfd)
1573 || elf_elfsections (abfd)[hdr->sh_link] == NULL)
1575 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1577 Elf_Internal_Shdr *dynsymhdr;
1579 /* The shared libraries distributed with hpux11 have a bogus
1580 sh_link field for the ".dynamic" section. Find the
1581 string table for the ".dynsym" section instead. */
1582 if (elf_dynsymtab (abfd) != 0)
1584 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1585 hdr->sh_link = dynsymhdr->sh_link;
1589 unsigned int i, num_sec;
1591 num_sec = elf_numsections (abfd);
1592 for (i = 1; i < num_sec; i++)
1594 dynsymhdr = elf_elfsections (abfd)[i];
1595 if (dynsymhdr->sh_type == SHT_DYNSYM)
1597 hdr->sh_link = dynsymhdr->sh_link;
1605 case SHT_SYMTAB: /* A symbol table */
1606 if (elf_onesymtab (abfd) == shindex)
1609 if (hdr->sh_entsize != bed->s->sizeof_sym)
1611 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1612 elf_onesymtab (abfd) = shindex;
1613 elf_tdata (abfd)->symtab_hdr = *hdr;
1614 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1615 abfd->flags |= HAS_SYMS;
1617 /* Sometimes a shared object will map in the symbol table. If
1618 SHF_ALLOC is set, and this is a shared object, then we also
1619 treat this section as a BFD section. We can not base the
1620 decision purely on SHF_ALLOC, because that flag is sometimes
1621 set in a relocatable object file, which would confuse the
1623 if ((hdr->sh_flags & SHF_ALLOC) != 0
1624 && (abfd->flags & DYNAMIC) != 0
1625 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1629 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1630 can't read symbols without that section loaded as well. It
1631 is most likely specified by the next section header. */
1632 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1634 unsigned int i, num_sec;
1636 num_sec = elf_numsections (abfd);
1637 for (i = shindex + 1; i < num_sec; i++)
1639 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1640 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1641 && hdr2->sh_link == shindex)
1645 for (i = 1; i < shindex; i++)
1647 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1648 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1649 && hdr2->sh_link == shindex)
1653 return bfd_section_from_shdr (abfd, i);
1657 case SHT_DYNSYM: /* A dynamic symbol table */
1658 if (elf_dynsymtab (abfd) == shindex)
1661 if (hdr->sh_entsize != bed->s->sizeof_sym)
1663 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1664 elf_dynsymtab (abfd) = shindex;
1665 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1666 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1667 abfd->flags |= HAS_SYMS;
1669 /* Besides being a symbol table, we also treat this as a regular
1670 section, so that objcopy can handle it. */
1671 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1673 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1674 if (elf_symtab_shndx (abfd) == shindex)
1677 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1678 elf_symtab_shndx (abfd) = shindex;
1679 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1680 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1683 case SHT_STRTAB: /* A string table */
1684 if (hdr->bfd_section != NULL)
1686 if (ehdr->e_shstrndx == shindex)
1688 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1689 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1692 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1695 elf_tdata (abfd)->strtab_hdr = *hdr;
1696 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1699 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1702 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1703 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1704 elf_elfsections (abfd)[shindex] = hdr;
1705 /* We also treat this as a regular section, so that objcopy
1707 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1711 /* If the string table isn't one of the above, then treat it as a
1712 regular section. We need to scan all the headers to be sure,
1713 just in case this strtab section appeared before the above. */
1714 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1716 unsigned int i, num_sec;
1718 num_sec = elf_numsections (abfd);
1719 for (i = 1; i < num_sec; i++)
1721 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1722 if (hdr2->sh_link == shindex)
1724 /* Prevent endless recursion on broken objects. */
1727 if (! bfd_section_from_shdr (abfd, i))
1729 if (elf_onesymtab (abfd) == i)
1731 if (elf_dynsymtab (abfd) == i)
1732 goto dynsymtab_strtab;
1736 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1740 /* *These* do a lot of work -- but build no sections! */
1742 asection *target_sect;
1743 Elf_Internal_Shdr *hdr2;
1744 unsigned int num_sec = elf_numsections (abfd);
1747 != (bfd_size_type) (hdr->sh_type == SHT_REL
1748 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
1751 /* Check for a bogus link to avoid crashing. */
1752 if (hdr->sh_link >= num_sec)
1754 ((*_bfd_error_handler)
1755 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1756 abfd, hdr->sh_link, name, shindex));
1757 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1761 /* For some incomprehensible reason Oracle distributes
1762 libraries for Solaris in which some of the objects have
1763 bogus sh_link fields. It would be nice if we could just
1764 reject them, but, unfortunately, some people need to use
1765 them. We scan through the section headers; if we find only
1766 one suitable symbol table, we clobber the sh_link to point
1767 to it. I hope this doesn't break anything. */
1768 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1769 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1775 for (scan = 1; scan < num_sec; scan++)
1777 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1778 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1789 hdr->sh_link = found;
1792 /* Get the symbol table. */
1793 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1794 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
1795 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1798 /* If this reloc section does not use the main symbol table we
1799 don't treat it as a reloc section. BFD can't adequately
1800 represent such a section, so at least for now, we don't
1801 try. We just present it as a normal section. We also
1802 can't use it as a reloc section if it points to the null
1803 section, an invalid section, or another reloc section. */
1804 if (hdr->sh_link != elf_onesymtab (abfd)
1805 || hdr->sh_info == SHN_UNDEF
1806 || hdr->sh_info >= num_sec
1807 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
1808 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
1809 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1812 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1814 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1815 if (target_sect == NULL)
1818 if ((target_sect->flags & SEC_RELOC) == 0
1819 || target_sect->reloc_count == 0)
1820 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1824 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1825 amt = sizeof (*hdr2);
1826 hdr2 = bfd_alloc (abfd, amt);
1829 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1832 elf_elfsections (abfd)[shindex] = hdr2;
1833 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1834 target_sect->flags |= SEC_RELOC;
1835 target_sect->relocation = NULL;
1836 target_sect->rel_filepos = hdr->sh_offset;
1837 /* In the section to which the relocations apply, mark whether
1838 its relocations are of the REL or RELA variety. */
1839 if (hdr->sh_size != 0)
1840 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
1841 abfd->flags |= HAS_RELOC;
1845 case SHT_GNU_verdef:
1846 elf_dynverdef (abfd) = shindex;
1847 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1848 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1850 case SHT_GNU_versym:
1851 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
1853 elf_dynversym (abfd) = shindex;
1854 elf_tdata (abfd)->dynversym_hdr = *hdr;
1855 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1857 case SHT_GNU_verneed:
1858 elf_dynverref (abfd) = shindex;
1859 elf_tdata (abfd)->dynverref_hdr = *hdr;
1860 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1866 if (! IS_VALID_GROUP_SECTION_HEADER (hdr))
1868 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1870 if (hdr->contents != NULL)
1872 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1873 unsigned int n_elt = hdr->sh_size / GRP_ENTRY_SIZE;
1876 if (idx->flags & GRP_COMDAT)
1877 hdr->bfd_section->flags
1878 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1880 /* We try to keep the same section order as it comes in. */
1882 while (--n_elt != 0)
1886 if (idx->shdr != NULL
1887 && (s = idx->shdr->bfd_section) != NULL
1888 && elf_next_in_group (s) != NULL)
1890 elf_next_in_group (hdr->bfd_section) = s;
1898 /* Possibly an attributes section. */
1899 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
1900 || hdr->sh_type == bed->obj_attrs_section_type)
1902 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1904 _bfd_elf_parse_attributes (abfd, hdr);
1908 /* Check for any processor-specific section types. */
1909 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
1912 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
1914 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1915 /* FIXME: How to properly handle allocated section reserved
1916 for applications? */
1917 (*_bfd_error_handler)
1918 (_("%B: don't know how to handle allocated, application "
1919 "specific section `%s' [0x%8x]"),
1920 abfd, name, hdr->sh_type);
1922 /* Allow sections reserved for applications. */
1923 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1926 else if (hdr->sh_type >= SHT_LOPROC
1927 && hdr->sh_type <= SHT_HIPROC)
1928 /* FIXME: We should handle this section. */
1929 (*_bfd_error_handler)
1930 (_("%B: don't know how to handle processor specific section "
1932 abfd, name, hdr->sh_type);
1933 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
1935 /* Unrecognised OS-specific sections. */
1936 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
1937 /* SHF_OS_NONCONFORMING indicates that special knowledge is
1938 required to correctly process the section and the file should
1939 be rejected with an error message. */
1940 (*_bfd_error_handler)
1941 (_("%B: don't know how to handle OS specific section "
1943 abfd, name, hdr->sh_type);
1945 /* Otherwise it should be processed. */
1946 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1949 /* FIXME: We should handle this section. */
1950 (*_bfd_error_handler)
1951 (_("%B: don't know how to handle section `%s' [0x%8x]"),
1952 abfd, name, hdr->sh_type);
1960 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
1961 Return SEC for sections that have no elf section, and NULL on error. */
1964 bfd_section_from_r_symndx (bfd *abfd,
1965 struct sym_sec_cache *cache,
1967 unsigned long r_symndx)
1969 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
1972 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
1974 Elf_Internal_Shdr *symtab_hdr;
1975 unsigned char esym[sizeof (Elf64_External_Sym)];
1976 Elf_External_Sym_Shndx eshndx;
1977 Elf_Internal_Sym isym;
1979 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1980 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
1981 &isym, esym, &eshndx) == NULL)
1984 if (cache->abfd != abfd)
1986 memset (cache->indx, -1, sizeof (cache->indx));
1989 cache->indx[ent] = r_symndx;
1990 cache->shndx[ent] = isym.st_shndx;
1993 s = bfd_section_from_elf_index (abfd, cache->shndx[ent]);
2000 /* Given an ELF section number, retrieve the corresponding BFD
2004 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
2006 if (index >= elf_numsections (abfd))
2008 return elf_elfsections (abfd)[index]->bfd_section;
2011 static const struct bfd_elf_special_section special_sections_b[] =
2013 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2014 { NULL, 0, 0, 0, 0 }
2017 static const struct bfd_elf_special_section special_sections_c[] =
2019 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
2020 { NULL, 0, 0, 0, 0 }
2023 static const struct bfd_elf_special_section special_sections_d[] =
2025 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2026 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2027 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
2028 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
2029 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
2030 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
2031 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
2032 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
2033 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
2034 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
2035 { NULL, 0, 0, 0, 0 }
2038 static const struct bfd_elf_special_section special_sections_f[] =
2040 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2041 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2042 { NULL, 0, 0, 0, 0 }
2045 static const struct bfd_elf_special_section special_sections_g[] =
2047 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2048 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2049 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2050 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2051 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2052 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2053 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2054 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2055 { NULL, 0, 0, 0, 0 }
2058 static const struct bfd_elf_special_section special_sections_h[] =
2060 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2061 { NULL, 0, 0, 0, 0 }
2064 static const struct bfd_elf_special_section special_sections_i[] =
2066 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2067 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2068 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2069 { NULL, 0, 0, 0, 0 }
2072 static const struct bfd_elf_special_section special_sections_l[] =
2074 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2075 { NULL, 0, 0, 0, 0 }
2078 static const struct bfd_elf_special_section special_sections_n[] =
2080 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2081 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2082 { NULL, 0, 0, 0, 0 }
2085 static const struct bfd_elf_special_section special_sections_p[] =
2087 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2088 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2089 { NULL, 0, 0, 0, 0 }
2092 static const struct bfd_elf_special_section special_sections_r[] =
2094 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2095 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2096 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2097 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2098 { NULL, 0, 0, 0, 0 }
2101 static const struct bfd_elf_special_section special_sections_s[] =
2103 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2104 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2105 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2106 /* See struct bfd_elf_special_section declaration for the semantics of
2107 this special case where .prefix_length != strlen (.prefix). */
2108 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2109 { NULL, 0, 0, 0, 0 }
2112 static const struct bfd_elf_special_section special_sections_t[] =
2114 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2115 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2116 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2117 { NULL, 0, 0, 0, 0 }
2120 static const struct bfd_elf_special_section special_sections_z[] =
2122 { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 },
2123 { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 },
2124 { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 },
2125 { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 },
2126 { NULL, 0, 0, 0, 0 }
2129 static const struct bfd_elf_special_section *special_sections[] =
2131 special_sections_b, /* 'b' */
2132 special_sections_c, /* 'c' */
2133 special_sections_d, /* 'd' */
2135 special_sections_f, /* 'f' */
2136 special_sections_g, /* 'g' */
2137 special_sections_h, /* 'h' */
2138 special_sections_i, /* 'i' */
2141 special_sections_l, /* 'l' */
2143 special_sections_n, /* 'n' */
2145 special_sections_p, /* 'p' */
2147 special_sections_r, /* 'r' */
2148 special_sections_s, /* 's' */
2149 special_sections_t, /* 't' */
2155 special_sections_z /* 'z' */
2158 const struct bfd_elf_special_section *
2159 _bfd_elf_get_special_section (const char *name,
2160 const struct bfd_elf_special_section *spec,
2166 len = strlen (name);
2168 for (i = 0; spec[i].prefix != NULL; i++)
2171 int prefix_len = spec[i].prefix_length;
2173 if (len < prefix_len)
2175 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2178 suffix_len = spec[i].suffix_length;
2179 if (suffix_len <= 0)
2181 if (name[prefix_len] != 0)
2183 if (suffix_len == 0)
2185 if (name[prefix_len] != '.'
2186 && (suffix_len == -2
2187 || (rela && spec[i].type == SHT_REL)))
2193 if (len < prefix_len + suffix_len)
2195 if (memcmp (name + len - suffix_len,
2196 spec[i].prefix + prefix_len,
2206 const struct bfd_elf_special_section *
2207 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2210 const struct bfd_elf_special_section *spec;
2211 const struct elf_backend_data *bed;
2213 /* See if this is one of the special sections. */
2214 if (sec->name == NULL)
2217 bed = get_elf_backend_data (abfd);
2218 spec = bed->special_sections;
2221 spec = _bfd_elf_get_special_section (sec->name,
2222 bed->special_sections,
2228 if (sec->name[0] != '.')
2231 i = sec->name[1] - 'b';
2232 if (i < 0 || i > 'z' - 'b')
2235 spec = special_sections[i];
2240 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2244 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2246 struct bfd_elf_section_data *sdata;
2247 const struct elf_backend_data *bed;
2248 const struct bfd_elf_special_section *ssect;
2250 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2253 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2256 sec->used_by_bfd = sdata;
2259 /* Indicate whether or not this section should use RELA relocations. */
2260 bed = get_elf_backend_data (abfd);
2261 sec->use_rela_p = bed->default_use_rela_p;
2263 /* When we read a file, we don't need to set ELF section type and
2264 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2265 anyway. We will set ELF section type and flags for all linker
2266 created sections. If user specifies BFD section flags, we will
2267 set ELF section type and flags based on BFD section flags in
2268 elf_fake_sections. */
2269 if ((!sec->flags && abfd->direction != read_direction)
2270 || (sec->flags & SEC_LINKER_CREATED) != 0)
2272 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2275 elf_section_type (sec) = ssect->type;
2276 elf_section_flags (sec) = ssect->attr;
2280 return _bfd_generic_new_section_hook (abfd, sec);
2283 /* Create a new bfd section from an ELF program header.
2285 Since program segments have no names, we generate a synthetic name
2286 of the form segment<NUM>, where NUM is generally the index in the
2287 program header table. For segments that are split (see below) we
2288 generate the names segment<NUM>a and segment<NUM>b.
2290 Note that some program segments may have a file size that is different than
2291 (less than) the memory size. All this means is that at execution the
2292 system must allocate the amount of memory specified by the memory size,
2293 but only initialize it with the first "file size" bytes read from the
2294 file. This would occur for example, with program segments consisting
2295 of combined data+bss.
2297 To handle the above situation, this routine generates TWO bfd sections
2298 for the single program segment. The first has the length specified by
2299 the file size of the segment, and the second has the length specified
2300 by the difference between the two sizes. In effect, the segment is split
2301 into its initialized and uninitialized parts.
2306 _bfd_elf_make_section_from_phdr (bfd *abfd,
2307 Elf_Internal_Phdr *hdr,
2309 const char *typename)
2317 split = ((hdr->p_memsz > 0)
2318 && (hdr->p_filesz > 0)
2319 && (hdr->p_memsz > hdr->p_filesz));
2321 if (hdr->p_filesz > 0)
2323 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2324 len = strlen (namebuf) + 1;
2325 name = bfd_alloc (abfd, len);
2328 memcpy (name, namebuf, len);
2329 newsect = bfd_make_section (abfd, name);
2330 if (newsect == NULL)
2332 newsect->vma = hdr->p_vaddr;
2333 newsect->lma = hdr->p_paddr;
2334 newsect->size = hdr->p_filesz;
2335 newsect->filepos = hdr->p_offset;
2336 newsect->flags |= SEC_HAS_CONTENTS;
2337 newsect->alignment_power = bfd_log2 (hdr->p_align);
2338 if (hdr->p_type == PT_LOAD)
2340 newsect->flags |= SEC_ALLOC;
2341 newsect->flags |= SEC_LOAD;
2342 if (hdr->p_flags & PF_X)
2344 /* FIXME: all we known is that it has execute PERMISSION,
2346 newsect->flags |= SEC_CODE;
2349 if (!(hdr->p_flags & PF_W))
2351 newsect->flags |= SEC_READONLY;
2355 if (hdr->p_memsz > hdr->p_filesz)
2359 sprintf (namebuf, "%s%d%s", typename, index, split ? "b" : "");
2360 len = strlen (namebuf) + 1;
2361 name = bfd_alloc (abfd, len);
2364 memcpy (name, namebuf, len);
2365 newsect = bfd_make_section (abfd, name);
2366 if (newsect == NULL)
2368 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2369 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2370 newsect->size = hdr->p_memsz - hdr->p_filesz;
2371 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2372 align = newsect->vma & -newsect->vma;
2373 if (align == 0 || align > hdr->p_align)
2374 align = hdr->p_align;
2375 newsect->alignment_power = bfd_log2 (align);
2376 if (hdr->p_type == PT_LOAD)
2378 /* Hack for gdb. Segments that have not been modified do
2379 not have their contents written to a core file, on the
2380 assumption that a debugger can find the contents in the
2381 executable. We flag this case by setting the fake
2382 section size to zero. Note that "real" bss sections will
2383 always have their contents dumped to the core file. */
2384 if (bfd_get_format (abfd) == bfd_core)
2386 newsect->flags |= SEC_ALLOC;
2387 if (hdr->p_flags & PF_X)
2388 newsect->flags |= SEC_CODE;
2390 if (!(hdr->p_flags & PF_W))
2391 newsect->flags |= SEC_READONLY;
2398 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2400 const struct elf_backend_data *bed;
2402 switch (hdr->p_type)
2405 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2408 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2411 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2414 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2417 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2419 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2424 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2427 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2429 case PT_GNU_EH_FRAME:
2430 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2434 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2437 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
2440 /* Check for any processor-specific program segment types. */
2441 bed = get_elf_backend_data (abfd);
2442 return bed->elf_backend_section_from_phdr (abfd, hdr, index, "proc");
2446 /* Initialize REL_HDR, the section-header for new section, containing
2447 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2448 relocations; otherwise, we use REL relocations. */
2451 _bfd_elf_init_reloc_shdr (bfd *abfd,
2452 Elf_Internal_Shdr *rel_hdr,
2454 bfd_boolean use_rela_p)
2457 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2458 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2460 name = bfd_alloc (abfd, amt);
2463 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2465 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2467 if (rel_hdr->sh_name == (unsigned int) -1)
2469 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2470 rel_hdr->sh_entsize = (use_rela_p
2471 ? bed->s->sizeof_rela
2472 : bed->s->sizeof_rel);
2473 rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
2474 rel_hdr->sh_flags = 0;
2475 rel_hdr->sh_addr = 0;
2476 rel_hdr->sh_size = 0;
2477 rel_hdr->sh_offset = 0;
2482 /* Set up an ELF internal section header for a section. */
2485 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2487 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2488 bfd_boolean *failedptr = failedptrarg;
2489 Elf_Internal_Shdr *this_hdr;
2490 unsigned int sh_type;
2494 /* We already failed; just get out of the bfd_map_over_sections
2499 this_hdr = &elf_section_data (asect)->this_hdr;
2501 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2502 asect->name, FALSE);
2503 if (this_hdr->sh_name == (unsigned int) -1)
2509 /* Don't clear sh_flags. Assembler may set additional bits. */
2511 if ((asect->flags & SEC_ALLOC) != 0
2512 || asect->user_set_vma)
2513 this_hdr->sh_addr = asect->vma;
2515 this_hdr->sh_addr = 0;
2517 this_hdr->sh_offset = 0;
2518 this_hdr->sh_size = asect->size;
2519 this_hdr->sh_link = 0;
2520 this_hdr->sh_addralign = (bfd_vma) 1 << asect->alignment_power;
2521 /* The sh_entsize and sh_info fields may have been set already by
2522 copy_private_section_data. */
2524 this_hdr->bfd_section = asect;
2525 this_hdr->contents = NULL;
2527 /* If the section type is unspecified, we set it based on
2529 if ((asect->flags & SEC_GROUP) != 0)
2530 sh_type = SHT_GROUP;
2531 else if ((asect->flags & SEC_ALLOC) != 0
2532 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2533 || (asect->flags & SEC_NEVER_LOAD) != 0))
2534 sh_type = SHT_NOBITS;
2536 sh_type = SHT_PROGBITS;
2538 if (this_hdr->sh_type == SHT_NULL)
2539 this_hdr->sh_type = sh_type;
2540 else if (this_hdr->sh_type == SHT_NOBITS
2541 && sh_type == SHT_PROGBITS
2542 && (asect->flags & SEC_ALLOC) != 0)
2544 /* Warn if we are changing a NOBITS section to PROGBITS, but
2545 allow the link to proceed. This can happen when users link
2546 non-bss input sections to bss output sections, or emit data
2547 to a bss output section via a linker script. */
2548 (*_bfd_error_handler)
2549 (_("warning: section `%A' type changed to PROGBITS"), asect);
2550 this_hdr->sh_type = sh_type;
2553 switch (this_hdr->sh_type)
2559 case SHT_INIT_ARRAY:
2560 case SHT_FINI_ARRAY:
2561 case SHT_PREINIT_ARRAY:
2568 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2572 this_hdr->sh_entsize = bed->s->sizeof_sym;
2576 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2580 if (get_elf_backend_data (abfd)->may_use_rela_p)
2581 this_hdr->sh_entsize = bed->s->sizeof_rela;
2585 if (get_elf_backend_data (abfd)->may_use_rel_p)
2586 this_hdr->sh_entsize = bed->s->sizeof_rel;
2589 case SHT_GNU_versym:
2590 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2593 case SHT_GNU_verdef:
2594 this_hdr->sh_entsize = 0;
2595 /* objcopy or strip will copy over sh_info, but may not set
2596 cverdefs. The linker will set cverdefs, but sh_info will be
2598 if (this_hdr->sh_info == 0)
2599 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2601 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2602 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2605 case SHT_GNU_verneed:
2606 this_hdr->sh_entsize = 0;
2607 /* objcopy or strip will copy over sh_info, but may not set
2608 cverrefs. The linker will set cverrefs, but sh_info will be
2610 if (this_hdr->sh_info == 0)
2611 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2613 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2614 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2618 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
2622 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
2626 if ((asect->flags & SEC_ALLOC) != 0)
2627 this_hdr->sh_flags |= SHF_ALLOC;
2628 if ((asect->flags & SEC_READONLY) == 0)
2629 this_hdr->sh_flags |= SHF_WRITE;
2630 if ((asect->flags & SEC_CODE) != 0)
2631 this_hdr->sh_flags |= SHF_EXECINSTR;
2632 if ((asect->flags & SEC_MERGE) != 0)
2634 this_hdr->sh_flags |= SHF_MERGE;
2635 this_hdr->sh_entsize = asect->entsize;
2636 if ((asect->flags & SEC_STRINGS) != 0)
2637 this_hdr->sh_flags |= SHF_STRINGS;
2639 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2640 this_hdr->sh_flags |= SHF_GROUP;
2641 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2643 this_hdr->sh_flags |= SHF_TLS;
2644 if (asect->size == 0
2645 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2647 struct bfd_link_order *o = asect->map_tail.link_order;
2649 this_hdr->sh_size = 0;
2652 this_hdr->sh_size = o->offset + o->size;
2653 if (this_hdr->sh_size != 0)
2654 this_hdr->sh_type = SHT_NOBITS;
2659 /* Check for processor-specific section types. */
2660 sh_type = this_hdr->sh_type;
2661 if (bed->elf_backend_fake_sections
2662 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2665 if (sh_type == SHT_NOBITS && asect->size != 0)
2667 /* Don't change the header type from NOBITS if we are being
2668 called for objcopy --only-keep-debug. */
2669 this_hdr->sh_type = sh_type;
2672 /* If the section has relocs, set up a section header for the
2673 SHT_REL[A] section. If two relocation sections are required for
2674 this section, it is up to the processor-specific back-end to
2675 create the other. */
2676 if ((asect->flags & SEC_RELOC) != 0
2677 && !_bfd_elf_init_reloc_shdr (abfd,
2678 &elf_section_data (asect)->rel_hdr,
2684 /* Fill in the contents of a SHT_GROUP section. */
2687 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2689 bfd_boolean *failedptr = failedptrarg;
2690 unsigned long symindx;
2691 asection *elt, *first;
2695 /* Ignore linker created group section. See elfNN_ia64_object_p in
2697 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2702 if (elf_group_id (sec) != NULL)
2703 symindx = elf_group_id (sec)->udata.i;
2707 /* If called from the assembler, swap_out_syms will have set up
2708 elf_section_syms; If called for "ld -r", use target_index. */
2709 if (elf_section_syms (abfd) != NULL)
2710 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2712 symindx = sec->target_index;
2714 elf_section_data (sec)->this_hdr.sh_info = symindx;
2716 /* The contents won't be allocated for "ld -r" or objcopy. */
2718 if (sec->contents == NULL)
2721 sec->contents = bfd_alloc (abfd, sec->size);
2723 /* Arrange for the section to be written out. */
2724 elf_section_data (sec)->this_hdr.contents = sec->contents;
2725 if (sec->contents == NULL)
2732 loc = sec->contents + sec->size;
2734 /* Get the pointer to the first section in the group that gas
2735 squirreled away here. objcopy arranges for this to be set to the
2736 start of the input section group. */
2737 first = elt = elf_next_in_group (sec);
2739 /* First element is a flag word. Rest of section is elf section
2740 indices for all the sections of the group. Write them backwards
2741 just to keep the group in the same order as given in .section
2742 directives, not that it matters. */
2751 s = s->output_section;
2754 idx = elf_section_data (s)->this_idx;
2755 H_PUT_32 (abfd, idx, loc);
2756 elt = elf_next_in_group (elt);
2761 if ((loc -= 4) != sec->contents)
2764 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2767 /* Assign all ELF section numbers. The dummy first section is handled here
2768 too. The link/info pointers for the standard section types are filled
2769 in here too, while we're at it. */
2772 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2774 struct elf_obj_tdata *t = elf_tdata (abfd);
2776 unsigned int section_number, secn;
2777 Elf_Internal_Shdr **i_shdrp;
2778 struct bfd_elf_section_data *d;
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 if (bfd_get_symcount (abfd) > 0)
2836 t->symtab_section = section_number++;
2837 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2838 if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
2840 t->symtab_shndx_section = section_number++;
2841 t->symtab_shndx_hdr.sh_name
2842 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2843 ".symtab_shndx", FALSE);
2844 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2847 t->strtab_section = section_number++;
2848 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2851 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2852 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2854 elf_numsections (abfd) = section_number;
2855 elf_elfheader (abfd)->e_shnum = section_number;
2857 /* Set up the list of section header pointers, in agreement with the
2859 i_shdrp = bfd_zalloc2 (abfd, section_number, sizeof (Elf_Internal_Shdr *));
2860 if (i_shdrp == NULL)
2863 i_shdrp[0] = bfd_zalloc (abfd, sizeof (Elf_Internal_Shdr));
2864 if (i_shdrp[0] == NULL)
2866 bfd_release (abfd, i_shdrp);
2870 elf_elfsections (abfd) = i_shdrp;
2872 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2873 if (bfd_get_symcount (abfd) > 0)
2875 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2876 if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF))
2878 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2879 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2881 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2882 t->symtab_hdr.sh_link = t->strtab_section;
2885 for (sec = abfd->sections; sec; sec = sec->next)
2887 struct bfd_elf_section_data *d = elf_section_data (sec);
2891 i_shdrp[d->this_idx] = &d->this_hdr;
2892 if (d->rel_idx != 0)
2893 i_shdrp[d->rel_idx] = &d->rel_hdr;
2894 if (d->rel_idx2 != 0)
2895 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2897 /* Fill in the sh_link and sh_info fields while we're at it. */
2899 /* sh_link of a reloc section is the section index of the symbol
2900 table. sh_info is the section index of the section to which
2901 the relocation entries apply. */
2902 if (d->rel_idx != 0)
2904 d->rel_hdr.sh_link = t->symtab_section;
2905 d->rel_hdr.sh_info = d->this_idx;
2907 if (d->rel_idx2 != 0)
2909 d->rel_hdr2->sh_link = t->symtab_section;
2910 d->rel_hdr2->sh_info = d->this_idx;
2913 /* We need to set up sh_link for SHF_LINK_ORDER. */
2914 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
2916 s = elf_linked_to_section (sec);
2919 /* elf_linked_to_section points to the input section. */
2920 if (link_info != NULL)
2922 /* Check discarded linkonce section. */
2923 if (elf_discarded_section (s))
2926 (*_bfd_error_handler)
2927 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
2928 abfd, d->this_hdr.bfd_section,
2930 /* Point to the kept section if it has the same
2931 size as the discarded one. */
2932 kept = _bfd_elf_check_kept_section (s, link_info);
2935 bfd_set_error (bfd_error_bad_value);
2941 s = s->output_section;
2942 BFD_ASSERT (s != NULL);
2946 /* Handle objcopy. */
2947 if (s->output_section == NULL)
2949 (*_bfd_error_handler)
2950 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
2951 abfd, d->this_hdr.bfd_section, s, s->owner);
2952 bfd_set_error (bfd_error_bad_value);
2955 s = s->output_section;
2957 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2962 The Intel C compiler generates SHT_IA_64_UNWIND with
2963 SHF_LINK_ORDER. But it doesn't set the sh_link or
2964 sh_info fields. Hence we could get the situation
2966 const struct elf_backend_data *bed
2967 = get_elf_backend_data (abfd);
2968 if (bed->link_order_error_handler)
2969 bed->link_order_error_handler
2970 (_("%B: warning: sh_link not set for section `%A'"),
2975 switch (d->this_hdr.sh_type)
2979 /* A reloc section which we are treating as a normal BFD
2980 section. sh_link is the section index of the symbol
2981 table. sh_info is the section index of the section to
2982 which the relocation entries apply. We assume that an
2983 allocated reloc section uses the dynamic symbol table.
2984 FIXME: How can we be sure? */
2985 s = bfd_get_section_by_name (abfd, ".dynsym");
2987 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2989 /* We look up the section the relocs apply to by name. */
2991 if (d->this_hdr.sh_type == SHT_REL)
2995 s = bfd_get_section_by_name (abfd, name);
2997 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3001 /* We assume that a section named .stab*str is a stabs
3002 string section. We look for a section with the same name
3003 but without the trailing ``str'', and set its sh_link
3004 field to point to this section. */
3005 if (CONST_STRNEQ (sec->name, ".stab")
3006 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3011 len = strlen (sec->name);
3012 alc = bfd_malloc (len - 2);
3015 memcpy (alc, sec->name, len - 3);
3016 alc[len - 3] = '\0';
3017 s = bfd_get_section_by_name (abfd, alc);
3021 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3023 /* This is a .stab section. */
3024 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3025 elf_section_data (s)->this_hdr.sh_entsize
3026 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3033 case SHT_GNU_verneed:
3034 case SHT_GNU_verdef:
3035 /* sh_link is the section header index of the string table
3036 used for the dynamic entries, or the symbol table, or the
3038 s = bfd_get_section_by_name (abfd, ".dynstr");
3040 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3043 case SHT_GNU_LIBLIST:
3044 /* sh_link is the section header index of the prelink library
3045 list used for the dynamic entries, or the symbol table, or
3046 the version strings. */
3047 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3048 ? ".dynstr" : ".gnu.libstr");
3050 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3055 case SHT_GNU_versym:
3056 /* sh_link is the section header index of the symbol table
3057 this hash table or version table is for. */
3058 s = bfd_get_section_by_name (abfd, ".dynsym");
3060 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3064 d->this_hdr.sh_link = t->symtab_section;
3068 for (secn = 1; secn < section_number; ++secn)
3069 if (i_shdrp[secn] == NULL)
3070 i_shdrp[secn] = i_shdrp[0];
3072 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3073 i_shdrp[secn]->sh_name);
3077 /* Map symbol from it's internal number to the external number, moving
3078 all local symbols to be at the head of the list. */
3081 sym_is_global (bfd *abfd, asymbol *sym)
3083 /* If the backend has a special mapping, use it. */
3084 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3085 if (bed->elf_backend_sym_is_global)
3086 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3088 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3089 || bfd_is_und_section (bfd_get_section (sym))
3090 || bfd_is_com_section (bfd_get_section (sym)));
3093 /* Don't output section symbols for sections that are not going to be
3097 ignore_section_sym (bfd *abfd, asymbol *sym)
3099 return ((sym->flags & BSF_SECTION_SYM) != 0
3100 && !(sym->section->owner == abfd
3101 || (sym->section->output_section->owner == abfd
3102 && sym->section->output_offset == 0)));
3106 elf_map_symbols (bfd *abfd)
3108 unsigned int symcount = bfd_get_symcount (abfd);
3109 asymbol **syms = bfd_get_outsymbols (abfd);
3110 asymbol **sect_syms;
3111 unsigned int num_locals = 0;
3112 unsigned int num_globals = 0;
3113 unsigned int num_locals2 = 0;
3114 unsigned int num_globals2 = 0;
3121 fprintf (stderr, "elf_map_symbols\n");
3125 for (asect = abfd->sections; asect; asect = asect->next)
3127 if (max_index < asect->index)
3128 max_index = asect->index;
3132 sect_syms = bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3133 if (sect_syms == NULL)
3135 elf_section_syms (abfd) = sect_syms;
3136 elf_num_section_syms (abfd) = max_index;
3138 /* Init sect_syms entries for any section symbols we have already
3139 decided to output. */
3140 for (idx = 0; idx < symcount; idx++)
3142 asymbol *sym = syms[idx];
3144 if ((sym->flags & BSF_SECTION_SYM) != 0
3146 && !ignore_section_sym (abfd, sym))
3148 asection *sec = sym->section;
3150 if (sec->owner != abfd)
3151 sec = sec->output_section;
3153 sect_syms[sec->index] = syms[idx];
3157 /* Classify all of the symbols. */
3158 for (idx = 0; idx < symcount; idx++)
3160 if (ignore_section_sym (abfd, syms[idx]))
3162 if (!sym_is_global (abfd, syms[idx]))
3168 /* We will be adding a section symbol for each normal BFD section. Most
3169 sections will already have a section symbol in outsymbols, but
3170 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3171 at least in that case. */
3172 for (asect = abfd->sections; asect; asect = asect->next)
3174 if (sect_syms[asect->index] == NULL)
3176 if (!sym_is_global (abfd, asect->symbol))
3183 /* Now sort the symbols so the local symbols are first. */
3184 new_syms = bfd_alloc2 (abfd, num_locals + num_globals, sizeof (asymbol *));
3186 if (new_syms == NULL)
3189 for (idx = 0; idx < symcount; idx++)
3191 asymbol *sym = syms[idx];
3194 if (ignore_section_sym (abfd, sym))
3196 if (!sym_is_global (abfd, sym))
3199 i = num_locals + num_globals2++;
3201 sym->udata.i = i + 1;
3203 for (asect = abfd->sections; asect; asect = asect->next)
3205 if (sect_syms[asect->index] == NULL)
3207 asymbol *sym = asect->symbol;
3210 sect_syms[asect->index] = sym;
3211 if (!sym_is_global (abfd, sym))
3214 i = num_locals + num_globals2++;
3216 sym->udata.i = i + 1;
3220 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3222 elf_num_locals (abfd) = num_locals;
3223 elf_num_globals (abfd) = num_globals;
3227 /* Align to the maximum file alignment that could be required for any
3228 ELF data structure. */
3230 static inline file_ptr
3231 align_file_position (file_ptr off, int align)
3233 return (off + align - 1) & ~(align - 1);
3236 /* Assign a file position to a section, optionally aligning to the
3237 required section alignment. */
3240 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3244 if (align && i_shdrp->sh_addralign > 1)
3245 offset = BFD_ALIGN (offset, i_shdrp->sh_addralign);
3246 i_shdrp->sh_offset = offset;
3247 if (i_shdrp->bfd_section != NULL)
3248 i_shdrp->bfd_section->filepos = offset;
3249 if (i_shdrp->sh_type != SHT_NOBITS)
3250 offset += i_shdrp->sh_size;
3254 /* Compute the file positions we are going to put the sections at, and
3255 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3256 is not NULL, this is being called by the ELF backend linker. */
3259 _bfd_elf_compute_section_file_positions (bfd *abfd,
3260 struct bfd_link_info *link_info)
3262 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3264 struct bfd_strtab_hash *strtab = NULL;
3265 Elf_Internal_Shdr *shstrtab_hdr;
3267 if (abfd->output_has_begun)
3270 /* Do any elf backend specific processing first. */
3271 if (bed->elf_backend_begin_write_processing)
3272 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3274 if (! prep_headers (abfd))
3277 /* Post process the headers if necessary. */
3278 if (bed->elf_backend_post_process_headers)
3279 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3282 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3286 if (!assign_section_numbers (abfd, link_info))
3289 /* The backend linker builds symbol table information itself. */
3290 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3292 /* Non-zero if doing a relocatable link. */
3293 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3295 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3299 if (link_info == NULL)
3301 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3306 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3307 /* sh_name was set in prep_headers. */
3308 shstrtab_hdr->sh_type = SHT_STRTAB;
3309 shstrtab_hdr->sh_flags = 0;
3310 shstrtab_hdr->sh_addr = 0;
3311 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3312 shstrtab_hdr->sh_entsize = 0;
3313 shstrtab_hdr->sh_link = 0;
3314 shstrtab_hdr->sh_info = 0;
3315 /* sh_offset is set in assign_file_positions_except_relocs. */
3316 shstrtab_hdr->sh_addralign = 1;
3318 if (!assign_file_positions_except_relocs (abfd, link_info))
3321 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3324 Elf_Internal_Shdr *hdr;
3326 off = elf_tdata (abfd)->next_file_pos;
3328 hdr = &elf_tdata (abfd)->symtab_hdr;
3329 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3331 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3332 if (hdr->sh_size != 0)
3333 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3335 hdr = &elf_tdata (abfd)->strtab_hdr;
3336 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3338 elf_tdata (abfd)->next_file_pos = off;
3340 /* Now that we know where the .strtab section goes, write it
3342 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3343 || ! _bfd_stringtab_emit (abfd, strtab))
3345 _bfd_stringtab_free (strtab);
3348 abfd->output_has_begun = TRUE;
3353 /* Make an initial estimate of the size of the program header. If we
3354 get the number wrong here, we'll redo section placement. */
3356 static bfd_size_type
3357 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3361 const struct elf_backend_data *bed;
3363 /* Assume we will need exactly two PT_LOAD segments: one for text
3364 and one for data. */
3367 s = bfd_get_section_by_name (abfd, ".interp");
3368 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3370 /* If we have a loadable interpreter section, we need a
3371 PT_INTERP segment. In this case, assume we also need a
3372 PT_PHDR segment, although that may not be true for all
3377 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3379 /* We need a PT_DYNAMIC segment. */
3383 if (info != NULL && info->relro)
3385 /* We need a PT_GNU_RELRO segment. */
3389 if (elf_tdata (abfd)->eh_frame_hdr)
3391 /* We need a PT_GNU_EH_FRAME segment. */
3395 if (elf_tdata (abfd)->stack_flags)
3397 /* We need a PT_GNU_STACK segment. */
3401 for (s = abfd->sections; s != NULL; s = s->next)
3403 if ((s->flags & SEC_LOAD) != 0
3404 && CONST_STRNEQ (s->name, ".note"))
3406 /* We need a PT_NOTE segment. */
3408 /* Try to create just one PT_NOTE segment
3409 for all adjacent loadable .note* sections.
3410 gABI requires that within a PT_NOTE segment
3411 (and also inside of each SHT_NOTE section)
3412 each note is padded to a multiple of 4 size,
3413 so we check whether the sections are correctly
3415 if (s->alignment_power == 2)
3416 while (s->next != NULL
3417 && s->next->alignment_power == 2
3418 && (s->next->flags & SEC_LOAD) != 0
3419 && CONST_STRNEQ (s->next->name, ".note"))
3424 for (s = abfd->sections; s != NULL; s = s->next)
3426 if (s->flags & SEC_THREAD_LOCAL)
3428 /* We need a PT_TLS segment. */
3434 /* Let the backend count up any program headers it might need. */
3435 bed = get_elf_backend_data (abfd);
3436 if (bed->elf_backend_additional_program_headers)
3440 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3446 return segs * bed->s->sizeof_phdr;
3449 /* Find the segment that contains the output_section of section. */
3452 _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section)
3454 struct elf_segment_map *m;
3455 Elf_Internal_Phdr *p;
3457 for (m = elf_tdata (abfd)->segment_map,
3458 p = elf_tdata (abfd)->phdr;
3464 for (i = m->count - 1; i >= 0; i--)
3465 if (m->sections[i] == section)
3472 /* Create a mapping from a set of sections to a program segment. */
3474 static struct elf_segment_map *
3475 make_mapping (bfd *abfd,
3476 asection **sections,
3481 struct elf_segment_map *m;
3486 amt = sizeof (struct elf_segment_map);
3487 amt += (to - from - 1) * sizeof (asection *);
3488 m = bfd_zalloc (abfd, amt);
3492 m->p_type = PT_LOAD;
3493 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3494 m->sections[i - from] = *hdrpp;
3495 m->count = to - from;
3497 if (from == 0 && phdr)
3499 /* Include the headers in the first PT_LOAD segment. */
3500 m->includes_filehdr = 1;
3501 m->includes_phdrs = 1;
3507 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3510 struct elf_segment_map *
3511 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3513 struct elf_segment_map *m;
3515 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3519 m->p_type = PT_DYNAMIC;
3521 m->sections[0] = dynsec;
3526 /* Possibly add or remove segments from the segment map. */
3529 elf_modify_segment_map (bfd *abfd,
3530 struct bfd_link_info *info,
3531 bfd_boolean remove_empty_load)
3533 struct elf_segment_map **m;
3534 const struct elf_backend_data *bed;
3536 /* The placement algorithm assumes that non allocated sections are
3537 not in PT_LOAD segments. We ensure this here by removing such
3538 sections from the segment map. We also remove excluded
3539 sections. Finally, any PT_LOAD segment without sections is
3541 m = &elf_tdata (abfd)->segment_map;
3544 unsigned int i, new_count;
3546 for (new_count = 0, i = 0; i < (*m)->count; i++)
3548 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3549 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3550 || (*m)->p_type != PT_LOAD))
3552 (*m)->sections[new_count] = (*m)->sections[i];
3556 (*m)->count = new_count;
3558 if (remove_empty_load && (*m)->p_type == PT_LOAD && (*m)->count == 0)
3564 bed = get_elf_backend_data (abfd);
3565 if (bed->elf_backend_modify_segment_map != NULL)
3567 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3574 /* Set up a mapping from BFD sections to program segments. */
3577 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3580 struct elf_segment_map *m;
3581 asection **sections = NULL;
3582 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3583 bfd_boolean no_user_phdrs;
3585 no_user_phdrs = elf_tdata (abfd)->segment_map == NULL;
3586 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
3590 struct elf_segment_map *mfirst;
3591 struct elf_segment_map **pm;
3594 unsigned int phdr_index;
3595 bfd_vma maxpagesize;
3597 bfd_boolean phdr_in_segment = TRUE;
3598 bfd_boolean writable;
3600 asection *first_tls = NULL;
3601 asection *dynsec, *eh_frame_hdr;
3604 /* Select the allocated sections, and sort them. */
3606 sections = bfd_malloc2 (bfd_count_sections (abfd), sizeof (asection *));
3607 if (sections == NULL)
3611 for (s = abfd->sections; s != NULL; s = s->next)
3613 if ((s->flags & SEC_ALLOC) != 0)
3619 BFD_ASSERT (i <= bfd_count_sections (abfd));
3622 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3624 /* Build the mapping. */
3629 /* If we have a .interp section, then create a PT_PHDR segment for
3630 the program headers and a PT_INTERP segment for the .interp
3632 s = bfd_get_section_by_name (abfd, ".interp");
3633 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3635 amt = sizeof (struct elf_segment_map);
3636 m = bfd_zalloc (abfd, amt);
3640 m->p_type = PT_PHDR;
3641 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3642 m->p_flags = PF_R | PF_X;
3643 m->p_flags_valid = 1;
3644 m->includes_phdrs = 1;
3649 amt = sizeof (struct elf_segment_map);
3650 m = bfd_zalloc (abfd, amt);
3654 m->p_type = PT_INTERP;
3662 /* Look through the sections. We put sections in the same program
3663 segment when the start of the second section can be placed within
3664 a few bytes of the end of the first section. */
3668 maxpagesize = bed->maxpagesize;
3670 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3672 && (dynsec->flags & SEC_LOAD) == 0)
3675 /* Deal with -Ttext or something similar such that the first section
3676 is not adjacent to the program headers. This is an
3677 approximation, since at this point we don't know exactly how many
3678 program headers we will need. */
3681 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
3683 if (phdr_size == (bfd_size_type) -1)
3684 phdr_size = get_program_header_size (abfd, info);
3685 if ((abfd->flags & D_PAGED) == 0
3686 || sections[0]->lma < phdr_size
3687 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3688 phdr_in_segment = FALSE;
3691 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3694 bfd_boolean new_segment;
3698 /* See if this section and the last one will fit in the same
3701 if (last_hdr == NULL)
3703 /* If we don't have a segment yet, then we don't need a new
3704 one (we build the last one after this loop). */
3705 new_segment = FALSE;
3707 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3709 /* If this section has a different relation between the
3710 virtual address and the load address, then we need a new
3714 /* In the next test we have to be careful when last_hdr->lma is close
3715 to the end of the address space. If the aligned address wraps
3716 around to the start of the address space, then there are no more
3717 pages left in memory and it is OK to assume that the current
3718 section can be included in the current segment. */
3719 else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3721 && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3724 /* If putting this section in this segment would force us to
3725 skip a page in the segment, then we need a new segment. */
3728 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3729 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3731 /* We don't want to put a loadable section after a
3732 nonloadable section in the same segment.
3733 Consider .tbss sections as loadable for this purpose. */
3736 else if ((abfd->flags & D_PAGED) == 0)
3738 /* If the file is not demand paged, which means that we
3739 don't require the sections to be correctly aligned in the
3740 file, then there is no other reason for a new segment. */
3741 new_segment = FALSE;
3744 && (hdr->flags & SEC_READONLY) == 0
3745 && (((last_hdr->lma + last_size - 1)
3746 & ~(maxpagesize - 1))
3747 != (hdr->lma & ~(maxpagesize - 1))))
3749 /* We don't want to put a writable section in a read only
3750 segment, unless they are on the same page in memory
3751 anyhow. We already know that the last section does not
3752 bring us past the current section on the page, so the
3753 only case in which the new section is not on the same
3754 page as the previous section is when the previous section
3755 ends precisely on a page boundary. */
3760 /* Otherwise, we can use the same segment. */
3761 new_segment = FALSE;
3764 /* Allow interested parties a chance to override our decision. */
3765 if (last_hdr != NULL
3767 && info->callbacks->override_segment_assignment != NULL)
3769 = info->callbacks->override_segment_assignment (info, abfd, hdr,
3775 if ((hdr->flags & SEC_READONLY) == 0)
3778 /* .tbss sections effectively have zero size. */
3779 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
3780 != SEC_THREAD_LOCAL)
3781 last_size = hdr->size;
3787 /* We need a new program segment. We must create a new program
3788 header holding all the sections from phdr_index until hdr. */
3790 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3797 if ((hdr->flags & SEC_READONLY) == 0)
3803 /* .tbss sections effectively have zero size. */
3804 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3805 last_size = hdr->size;
3809 phdr_in_segment = FALSE;
3812 /* Create a final PT_LOAD program segment. */
3813 if (last_hdr != NULL)
3815 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3823 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3826 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3833 /* For each batch of consecutive loadable .note sections,
3834 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
3835 because if we link together nonloadable .note sections and
3836 loadable .note sections, we will generate two .note sections
3837 in the output file. FIXME: Using names for section types is
3839 for (s = abfd->sections; s != NULL; s = s->next)
3841 if ((s->flags & SEC_LOAD) != 0
3842 && CONST_STRNEQ (s->name, ".note"))
3846 amt = sizeof (struct elf_segment_map);
3847 if (s->alignment_power == 2)
3848 for (s2 = s; s2->next != NULL; s2 = s2->next)
3850 if (s2->next->alignment_power == 2
3851 && (s2->next->flags & SEC_LOAD) != 0
3852 && CONST_STRNEQ (s2->next->name, ".note")
3853 && align_power (s2->vma + s2->size, 2)
3859 amt += (count - 1) * sizeof (asection *);
3860 m = bfd_zalloc (abfd, amt);
3864 m->p_type = PT_NOTE;
3868 m->sections[m->count - count--] = s;
3869 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3872 m->sections[m->count - 1] = s;
3873 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3877 if (s->flags & SEC_THREAD_LOCAL)
3885 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3890 amt = sizeof (struct elf_segment_map);
3891 amt += (tls_count - 1) * sizeof (asection *);
3892 m = bfd_zalloc (abfd, amt);
3897 m->count = tls_count;
3898 /* Mandated PF_R. */
3900 m->p_flags_valid = 1;
3901 for (i = 0; i < tls_count; ++i)
3903 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3904 m->sections[i] = first_tls;
3905 first_tls = first_tls->next;
3912 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3914 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3915 if (eh_frame_hdr != NULL
3916 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3918 amt = sizeof (struct elf_segment_map);
3919 m = bfd_zalloc (abfd, amt);
3923 m->p_type = PT_GNU_EH_FRAME;
3925 m->sections[0] = eh_frame_hdr->output_section;
3931 if (elf_tdata (abfd)->stack_flags)
3933 amt = sizeof (struct elf_segment_map);
3934 m = bfd_zalloc (abfd, amt);
3938 m->p_type = PT_GNU_STACK;
3939 m->p_flags = elf_tdata (abfd)->stack_flags;
3940 m->p_flags_valid = 1;
3946 if (info != NULL && info->relro)
3948 for (m = mfirst; m != NULL; m = m->next)
3950 if (m->p_type == PT_LOAD)
3952 asection *last = m->sections[m->count - 1];
3953 bfd_vma vaddr = m->sections[0]->vma;
3954 bfd_vma filesz = last->vma - vaddr + last->size;
3956 if (vaddr < info->relro_end
3957 && vaddr >= info->relro_start
3958 && (vaddr + filesz) >= info->relro_end)
3963 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
3966 amt = sizeof (struct elf_segment_map);
3967 m = bfd_zalloc (abfd, amt);
3971 m->p_type = PT_GNU_RELRO;
3973 m->p_flags_valid = 1;
3981 elf_tdata (abfd)->segment_map = mfirst;
3984 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
3987 for (count = 0, m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3989 elf_tdata (abfd)->program_header_size = count * bed->s->sizeof_phdr;
3994 if (sections != NULL)
3999 /* Sort sections by address. */
4002 elf_sort_sections (const void *arg1, const void *arg2)
4004 const asection *sec1 = *(const asection **) arg1;
4005 const asection *sec2 = *(const asection **) arg2;
4006 bfd_size_type size1, size2;
4008 /* Sort by LMA first, since this is the address used to
4009 place the section into a segment. */
4010 if (sec1->lma < sec2->lma)
4012 else if (sec1->lma > sec2->lma)
4015 /* Then sort by VMA. Normally the LMA and the VMA will be
4016 the same, and this will do nothing. */
4017 if (sec1->vma < sec2->vma)
4019 else if (sec1->vma > sec2->vma)
4022 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
4024 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
4030 /* If the indicies are the same, do not return 0
4031 here, but continue to try the next comparison. */
4032 if (sec1->target_index - sec2->target_index != 0)
4033 return sec1->target_index - sec2->target_index;
4038 else if (TOEND (sec2))
4043 /* Sort by size, to put zero sized sections
4044 before others at the same address. */
4046 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
4047 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
4054 return sec1->target_index - sec2->target_index;
4057 /* Ian Lance Taylor writes:
4059 We shouldn't be using % with a negative signed number. That's just
4060 not good. We have to make sure either that the number is not
4061 negative, or that the number has an unsigned type. When the types
4062 are all the same size they wind up as unsigned. When file_ptr is a
4063 larger signed type, the arithmetic winds up as signed long long,
4066 What we're trying to say here is something like ``increase OFF by
4067 the least amount that will cause it to be equal to the VMA modulo
4069 /* In other words, something like:
4071 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4072 off_offset = off % bed->maxpagesize;
4073 if (vma_offset < off_offset)
4074 adjustment = vma_offset + bed->maxpagesize - off_offset;
4076 adjustment = vma_offset - off_offset;
4078 which can can be collapsed into the expression below. */
4081 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4083 return ((vma - off) % maxpagesize);
4087 print_segment_map (const struct elf_segment_map *m)
4090 const char *pt = get_segment_type (m->p_type);
4095 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
4096 sprintf (buf, "LOPROC+%7.7x",
4097 (unsigned int) (m->p_type - PT_LOPROC));
4098 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
4099 sprintf (buf, "LOOS+%7.7x",
4100 (unsigned int) (m->p_type - PT_LOOS));
4102 snprintf (buf, sizeof (buf), "%8.8x",
4103 (unsigned int) m->p_type);
4106 fprintf (stderr, "%s:", pt);
4107 for (j = 0; j < m->count; j++)
4108 fprintf (stderr, " %s", m->sections [j]->name);
4112 /* Assign file positions to the sections based on the mapping from
4113 sections to segments. This function also sets up some fields in
4117 assign_file_positions_for_load_sections (bfd *abfd,
4118 struct bfd_link_info *link_info)
4120 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4121 struct elf_segment_map *m;
4122 Elf_Internal_Phdr *phdrs;
4123 Elf_Internal_Phdr *p;
4125 bfd_size_type maxpagesize;
4129 if (link_info == NULL
4130 && !_bfd_elf_map_sections_to_segments (abfd, link_info))
4134 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4137 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4138 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4139 elf_elfheader (abfd)->e_phnum = alloc;
4141 if (elf_tdata (abfd)->program_header_size == (bfd_size_type) -1)
4142 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4144 BFD_ASSERT (elf_tdata (abfd)->program_header_size
4145 >= alloc * bed->s->sizeof_phdr);
4149 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4153 phdrs = bfd_alloc2 (abfd, alloc, sizeof (Elf_Internal_Phdr));
4154 elf_tdata (abfd)->phdr = phdrs;
4159 if ((abfd->flags & D_PAGED) != 0)
4160 maxpagesize = bed->maxpagesize;
4162 off = bed->s->sizeof_ehdr;
4163 off += alloc * bed->s->sizeof_phdr;
4165 for (m = elf_tdata (abfd)->segment_map, p = phdrs, j = 0;
4167 m = m->next, p++, j++)
4171 bfd_boolean no_contents;
4173 /* If elf_segment_map is not from map_sections_to_segments, the
4174 sections may not be correctly ordered. NOTE: sorting should
4175 not be done to the PT_NOTE section of a corefile, which may
4176 contain several pseudo-sections artificially created by bfd.
4177 Sorting these pseudo-sections breaks things badly. */
4179 && !(elf_elfheader (abfd)->e_type == ET_CORE
4180 && m->p_type == PT_NOTE))
4181 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4184 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4185 number of sections with contents contributing to both p_filesz
4186 and p_memsz, followed by a number of sections with no contents
4187 that just contribute to p_memsz. In this loop, OFF tracks next
4188 available file offset for PT_LOAD and PT_NOTE segments. */
4189 p->p_type = m->p_type;
4190 p->p_flags = m->p_flags;
4195 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4197 if (m->p_paddr_valid)
4198 p->p_paddr = m->p_paddr;
4199 else if (m->count == 0)
4202 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
4204 if (p->p_type == PT_LOAD
4205 && (abfd->flags & D_PAGED) != 0)
4207 /* p_align in demand paged PT_LOAD segments effectively stores
4208 the maximum page size. When copying an executable with
4209 objcopy, we set m->p_align from the input file. Use this
4210 value for maxpagesize rather than bed->maxpagesize, which
4211 may be different. Note that we use maxpagesize for PT_TLS
4212 segment alignment later in this function, so we are relying
4213 on at least one PT_LOAD segment appearing before a PT_TLS
4215 if (m->p_align_valid)
4216 maxpagesize = m->p_align;
4218 p->p_align = maxpagesize;
4220 else if (m->p_align_valid)
4221 p->p_align = m->p_align;
4222 else if (m->count == 0)
4223 p->p_align = 1 << bed->s->log_file_align;
4227 no_contents = FALSE;
4229 if (p->p_type == PT_LOAD
4232 bfd_size_type align;
4233 unsigned int align_power = 0;
4235 if (m->p_align_valid)
4239 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4241 unsigned int secalign;
4243 secalign = bfd_get_section_alignment (abfd, *secpp);
4244 if (secalign > align_power)
4245 align_power = secalign;
4247 align = (bfd_size_type) 1 << align_power;
4248 if (align < maxpagesize)
4249 align = maxpagesize;
4252 for (i = 0; i < m->count; i++)
4253 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4254 /* If we aren't making room for this section, then
4255 it must be SHT_NOBITS regardless of what we've
4256 set via struct bfd_elf_special_section. */
4257 elf_section_type (m->sections[i]) = SHT_NOBITS;
4259 /* Find out whether this segment contains any loadable
4260 sections. If the first section isn't loadable, the same
4261 holds for any other sections. */
4263 while (elf_section_type (m->sections[i]) == SHT_NOBITS)
4265 /* If a segment starts with .tbss, we need to look
4266 at the next section to decide whether the segment
4267 has any loadable sections. */
4268 if ((elf_section_flags (m->sections[i]) & SHF_TLS) == 0
4276 off_adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4280 /* We shouldn't need to align the segment on disk since
4281 the segment doesn't need file space, but the gABI
4282 arguably requires the alignment and glibc ld.so
4283 checks it. So to comply with the alignment
4284 requirement but not waste file space, we adjust
4285 p_offset for just this segment. (OFF_ADJUST is
4286 subtracted from OFF later.) This may put p_offset
4287 past the end of file, but that shouldn't matter. */
4292 /* Make sure the .dynamic section is the first section in the
4293 PT_DYNAMIC segment. */
4294 else if (p->p_type == PT_DYNAMIC
4296 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4299 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4301 bfd_set_error (bfd_error_bad_value);
4304 /* Set the note section type to SHT_NOTE. */
4305 else if (p->p_type == PT_NOTE)
4306 for (i = 0; i < m->count; i++)
4307 elf_section_type (m->sections[i]) = SHT_NOTE;
4313 if (m->includes_filehdr)
4315 if (!m->p_flags_valid)
4317 p->p_filesz = bed->s->sizeof_ehdr;
4318 p->p_memsz = bed->s->sizeof_ehdr;
4321 BFD_ASSERT (p->p_type == PT_LOAD);
4323 if (p->p_vaddr < (bfd_vma) off)
4325 (*_bfd_error_handler)
4326 (_("%B: Not enough room for program headers, try linking with -N"),
4328 bfd_set_error (bfd_error_bad_value);
4333 if (!m->p_paddr_valid)
4338 if (m->includes_phdrs)
4340 if (!m->p_flags_valid)
4343 if (!m->includes_filehdr)
4345 p->p_offset = bed->s->sizeof_ehdr;
4349 BFD_ASSERT (p->p_type == PT_LOAD);
4350 p->p_vaddr -= off - p->p_offset;
4351 if (!m->p_paddr_valid)
4352 p->p_paddr -= off - p->p_offset;
4356 p->p_filesz += alloc * bed->s->sizeof_phdr;
4357 p->p_memsz += alloc * bed->s->sizeof_phdr;
4360 if (p->p_type == PT_LOAD
4361 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4363 if (!m->includes_filehdr && !m->includes_phdrs)
4369 adjust = off - (p->p_offset + p->p_filesz);
4371 p->p_filesz += adjust;
4372 p->p_memsz += adjust;
4376 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4377 maps. Set filepos for sections in PT_LOAD segments, and in
4378 core files, for sections in PT_NOTE segments.
4379 assign_file_positions_for_non_load_sections will set filepos
4380 for other sections and update p_filesz for other segments. */
4381 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4384 bfd_size_type align;
4385 Elf_Internal_Shdr *this_hdr;
4388 this_hdr = &elf_section_data (sec)->this_hdr;
4389 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4391 if ((p->p_type == PT_LOAD
4392 || p->p_type == PT_TLS)
4393 && (this_hdr->sh_type != SHT_NOBITS
4394 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4395 && ((this_hdr->sh_flags & SHF_TLS) == 0
4396 || p->p_type == PT_TLS))))
4398 bfd_signed_vma adjust = sec->vma - (p->p_vaddr + p->p_memsz);
4402 (*_bfd_error_handler)
4403 (_("%B: section %A vma 0x%lx overlaps previous sections"),
4404 abfd, sec, (unsigned long) sec->vma);
4407 p->p_memsz += adjust;
4409 if (this_hdr->sh_type != SHT_NOBITS)
4412 p->p_filesz += adjust;
4416 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4418 /* The section at i == 0 is the one that actually contains
4422 this_hdr->sh_offset = sec->filepos = off;
4423 off += this_hdr->sh_size;
4424 p->p_filesz = this_hdr->sh_size;
4430 /* The rest are fake sections that shouldn't be written. */
4439 if (p->p_type == PT_LOAD)
4441 this_hdr->sh_offset = sec->filepos = off;
4442 if (this_hdr->sh_type != SHT_NOBITS)
4443 off += this_hdr->sh_size;
4446 if (this_hdr->sh_type != SHT_NOBITS)
4448 p->p_filesz += this_hdr->sh_size;
4449 /* A load section without SHF_ALLOC is something like
4450 a note section in a PT_NOTE segment. These take
4451 file space but are not loaded into memory. */
4452 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4453 p->p_memsz += this_hdr->sh_size;
4455 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4457 if (p->p_type == PT_TLS)
4458 p->p_memsz += this_hdr->sh_size;
4460 /* .tbss is special. It doesn't contribute to p_memsz of
4462 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
4463 p->p_memsz += this_hdr->sh_size;
4466 if (align > p->p_align
4467 && !m->p_align_valid
4468 && (p->p_type != PT_LOAD
4469 || (abfd->flags & D_PAGED) == 0))
4473 if (!m->p_flags_valid)
4476 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4478 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4484 /* Check that all sections are in a PT_LOAD segment.
4485 Don't check funky gdb generated core files. */
4486 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4487 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4489 Elf_Internal_Shdr *this_hdr;
4493 this_hdr = &(elf_section_data(sec)->this_hdr);
4494 if (this_hdr->sh_size != 0
4495 && !ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, p))
4497 (*_bfd_error_handler)
4498 (_("%B: section `%A' can't be allocated in segment %d"),
4500 print_segment_map (m);
4501 bfd_set_error (bfd_error_bad_value);
4507 elf_tdata (abfd)->next_file_pos = off;
4511 /* Assign file positions for the other sections. */
4514 assign_file_positions_for_non_load_sections (bfd *abfd,
4515 struct bfd_link_info *link_info)
4517 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4518 Elf_Internal_Shdr **i_shdrpp;
4519 Elf_Internal_Shdr **hdrpp;
4520 Elf_Internal_Phdr *phdrs;
4521 Elf_Internal_Phdr *p;
4522 struct elf_segment_map *m;
4523 bfd_vma filehdr_vaddr, filehdr_paddr;
4524 bfd_vma phdrs_vaddr, phdrs_paddr;
4526 unsigned int num_sec;
4530 i_shdrpp = elf_elfsections (abfd);
4531 num_sec = elf_numsections (abfd);
4532 off = elf_tdata (abfd)->next_file_pos;
4533 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4535 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4536 Elf_Internal_Shdr *hdr;
4539 if (hdr->bfd_section != NULL
4540 && (hdr->bfd_section->filepos != 0
4541 || (hdr->sh_type == SHT_NOBITS
4542 && hdr->contents == NULL)))
4543 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
4544 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4546 if (hdr->sh_size != 0)
4547 ((*_bfd_error_handler)
4548 (_("%B: warning: allocated section `%s' not in segment"),
4550 (hdr->bfd_section == NULL
4552 : hdr->bfd_section->name)));
4553 /* We don't need to page align empty sections. */
4554 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
4555 off += vma_page_aligned_bias (hdr->sh_addr, off,
4558 off += vma_page_aligned_bias (hdr->sh_addr, off,
4560 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4563 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4564 && hdr->bfd_section == NULL)
4565 || hdr == i_shdrpp[tdata->symtab_section]
4566 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4567 || hdr == i_shdrpp[tdata->strtab_section])
4568 hdr->sh_offset = -1;
4570 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4573 /* Now that we have set the section file positions, we can set up
4574 the file positions for the non PT_LOAD segments. */
4578 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4580 phdrs = elf_tdata (abfd)->phdr;
4581 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4586 if (p->p_type != PT_LOAD)
4589 if (m->includes_filehdr)
4591 filehdr_vaddr = p->p_vaddr;
4592 filehdr_paddr = p->p_paddr;
4594 if (m->includes_phdrs)
4596 phdrs_vaddr = p->p_vaddr;
4597 phdrs_paddr = p->p_paddr;
4598 if (m->includes_filehdr)
4600 phdrs_vaddr += bed->s->sizeof_ehdr;
4601 phdrs_paddr += bed->s->sizeof_ehdr;
4606 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4612 if (p->p_type != PT_LOAD
4613 && (p->p_type != PT_NOTE
4614 || bfd_get_format (abfd) != bfd_core))
4616 Elf_Internal_Shdr *hdr;
4619 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4621 sect = m->sections[m->count - 1];
4622 hdr = &elf_section_data (sect)->this_hdr;
4623 p->p_filesz = sect->filepos - m->sections[0]->filepos;
4624 if (hdr->sh_type != SHT_NOBITS)
4625 p->p_filesz += hdr->sh_size;
4627 if (p->p_type == PT_GNU_RELRO)
4629 /* When we get here, we are copying executable
4630 or shared library. But we need to use the same
4632 Elf_Internal_Phdr *lp;
4634 for (lp = phdrs; lp < phdrs + count; ++lp)
4636 if (lp->p_type == PT_LOAD
4637 && lp->p_paddr == p->p_paddr)
4641 if (lp < phdrs + count)
4643 /* We should use p_size if it is valid since it
4644 may contain the first few bytes of the next
4645 SEC_ALLOC section. */
4646 if (m->p_size_valid)
4647 p->p_filesz = m->p_size;
4650 p->p_vaddr = lp->p_vaddr;
4651 p->p_offset = lp->p_offset;
4652 p->p_memsz = p->p_filesz;
4659 p->p_offset = m->sections[0]->filepos;
4664 if (m->includes_filehdr)
4666 p->p_vaddr = filehdr_vaddr;
4667 if (! m->p_paddr_valid)
4668 p->p_paddr = filehdr_paddr;
4670 else if (m->includes_phdrs)
4672 p->p_vaddr = phdrs_vaddr;
4673 if (! m->p_paddr_valid)
4674 p->p_paddr = phdrs_paddr;
4676 else if (p->p_type == PT_GNU_RELRO)
4678 Elf_Internal_Phdr *lp;
4680 for (lp = phdrs; lp < phdrs + count; ++lp)
4682 if (lp->p_type == PT_LOAD
4683 && lp->p_vaddr <= link_info->relro_end
4684 && lp->p_vaddr >= link_info->relro_start
4685 && (lp->p_vaddr + lp->p_filesz
4686 >= link_info->relro_end))
4690 if (lp < phdrs + count
4691 && link_info->relro_end > lp->p_vaddr)
4693 p->p_vaddr = lp->p_vaddr;
4694 p->p_paddr = lp->p_paddr;
4695 p->p_offset = lp->p_offset;
4696 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4697 p->p_memsz = p->p_filesz;
4699 p->p_flags = (lp->p_flags & ~PF_W);
4703 memset (p, 0, sizeof *p);
4704 p->p_type = PT_NULL;
4710 elf_tdata (abfd)->next_file_pos = off;
4715 /* Work out the file positions of all the sections. This is called by
4716 _bfd_elf_compute_section_file_positions. All the section sizes and
4717 VMAs must be known before this is called.
4719 Reloc sections come in two flavours: Those processed specially as
4720 "side-channel" data attached to a section to which they apply, and
4721 those that bfd doesn't process as relocations. The latter sort are
4722 stored in a normal bfd section by bfd_section_from_shdr. We don't
4723 consider the former sort here, unless they form part of the loadable
4724 image. Reloc sections not assigned here will be handled later by
4725 assign_file_positions_for_relocs.
4727 We also don't set the positions of the .symtab and .strtab here. */
4730 assign_file_positions_except_relocs (bfd *abfd,
4731 struct bfd_link_info *link_info)
4733 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4734 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4736 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4738 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4739 && bfd_get_format (abfd) != bfd_core)
4741 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4742 unsigned int num_sec = elf_numsections (abfd);
4743 Elf_Internal_Shdr **hdrpp;
4746 /* Start after the ELF header. */
4747 off = i_ehdrp->e_ehsize;
4749 /* We are not creating an executable, which means that we are
4750 not creating a program header, and that the actual order of
4751 the sections in the file is unimportant. */
4752 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4754 Elf_Internal_Shdr *hdr;
4757 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4758 && hdr->bfd_section == NULL)
4759 || i == tdata->symtab_section
4760 || i == tdata->symtab_shndx_section
4761 || i == tdata->strtab_section)
4763 hdr->sh_offset = -1;
4766 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4773 /* Assign file positions for the loaded sections based on the
4774 assignment of sections to segments. */
4775 if (!assign_file_positions_for_load_sections (abfd, link_info))
4778 /* And for non-load sections. */
4779 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
4782 if (bed->elf_backend_modify_program_headers != NULL)
4784 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
4788 /* Write out the program headers. */
4789 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
4790 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4791 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
4794 off = tdata->next_file_pos;
4797 /* Place the section headers. */
4798 off = align_file_position (off, 1 << bed->s->log_file_align);
4799 i_ehdrp->e_shoff = off;
4800 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4802 tdata->next_file_pos = off;
4808 prep_headers (bfd *abfd)
4810 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4811 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4812 struct elf_strtab_hash *shstrtab;
4813 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4815 i_ehdrp = elf_elfheader (abfd);
4817 shstrtab = _bfd_elf_strtab_init ();
4818 if (shstrtab == NULL)
4821 elf_shstrtab (abfd) = shstrtab;
4823 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4824 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4825 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4826 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4828 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4829 i_ehdrp->e_ident[EI_DATA] =
4830 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4831 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4833 if ((abfd->flags & DYNAMIC) != 0)
4834 i_ehdrp->e_type = ET_DYN;
4835 else if ((abfd->flags & EXEC_P) != 0)
4836 i_ehdrp->e_type = ET_EXEC;
4837 else if (bfd_get_format (abfd) == bfd_core)
4838 i_ehdrp->e_type = ET_CORE;
4840 i_ehdrp->e_type = ET_REL;
4842 switch (bfd_get_arch (abfd))
4844 case bfd_arch_unknown:
4845 i_ehdrp->e_machine = EM_NONE;
4848 /* There used to be a long list of cases here, each one setting
4849 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4850 in the corresponding bfd definition. To avoid duplication,
4851 the switch was removed. Machines that need special handling
4852 can generally do it in elf_backend_final_write_processing(),
4853 unless they need the information earlier than the final write.
4854 Such need can generally be supplied by replacing the tests for
4855 e_machine with the conditions used to determine it. */
4857 i_ehdrp->e_machine = bed->elf_machine_code;
4860 i_ehdrp->e_version = bed->s->ev_current;
4861 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4863 /* No program header, for now. */
4864 i_ehdrp->e_phoff = 0;
4865 i_ehdrp->e_phentsize = 0;
4866 i_ehdrp->e_phnum = 0;
4868 /* Each bfd section is section header entry. */
4869 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4870 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4872 /* If we're building an executable, we'll need a program header table. */
4873 if (abfd->flags & EXEC_P)
4874 /* It all happens later. */
4878 i_ehdrp->e_phentsize = 0;
4880 i_ehdrp->e_phoff = 0;
4883 elf_tdata (abfd)->symtab_hdr.sh_name =
4884 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4885 elf_tdata (abfd)->strtab_hdr.sh_name =
4886 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4887 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4888 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4889 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4890 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4891 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4897 /* Assign file positions for all the reloc sections which are not part
4898 of the loadable file image. */
4901 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4904 unsigned int i, num_sec;
4905 Elf_Internal_Shdr **shdrpp;
4907 off = elf_tdata (abfd)->next_file_pos;
4909 num_sec = elf_numsections (abfd);
4910 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4912 Elf_Internal_Shdr *shdrp;
4915 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4916 && shdrp->sh_offset == -1)
4917 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4920 elf_tdata (abfd)->next_file_pos = off;
4924 _bfd_elf_write_object_contents (bfd *abfd)
4926 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4927 Elf_Internal_Ehdr *i_ehdrp;
4928 Elf_Internal_Shdr **i_shdrp;
4930 unsigned int count, num_sec;
4932 if (! abfd->output_has_begun
4933 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4936 i_shdrp = elf_elfsections (abfd);
4937 i_ehdrp = elf_elfheader (abfd);
4940 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4944 _bfd_elf_assign_file_positions_for_relocs (abfd);
4946 /* After writing the headers, we need to write the sections too... */
4947 num_sec = elf_numsections (abfd);
4948 for (count = 1; count < num_sec; count++)
4950 if (bed->elf_backend_section_processing)
4951 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4952 if (i_shdrp[count]->contents)
4954 bfd_size_type amt = i_shdrp[count]->sh_size;
4956 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4957 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4962 /* Write out the section header names. */
4963 if (elf_shstrtab (abfd) != NULL
4964 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4965 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
4968 if (bed->elf_backend_final_write_processing)
4969 (*bed->elf_backend_final_write_processing) (abfd,
4970 elf_tdata (abfd)->linker);
4972 if (!bed->s->write_shdrs_and_ehdr (abfd))
4975 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
4976 if (elf_tdata (abfd)->after_write_object_contents)
4977 return (*elf_tdata (abfd)->after_write_object_contents) (abfd);
4983 _bfd_elf_write_corefile_contents (bfd *abfd)
4985 /* Hopefully this can be done just like an object file. */
4986 return _bfd_elf_write_object_contents (abfd);
4989 /* Given a section, search the header to find them. */
4992 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4994 const struct elf_backend_data *bed;
4997 if (elf_section_data (asect) != NULL
4998 && elf_section_data (asect)->this_idx != 0)
4999 return elf_section_data (asect)->this_idx;
5001 if (bfd_is_abs_section (asect))
5003 else if (bfd_is_com_section (asect))
5005 else if (bfd_is_und_section (asect))
5010 bed = get_elf_backend_data (abfd);
5011 if (bed->elf_backend_section_from_bfd_section)
5015 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
5019 if (index == SHN_BAD)
5020 bfd_set_error (bfd_error_nonrepresentable_section);
5025 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5029 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5031 asymbol *asym_ptr = *asym_ptr_ptr;
5033 flagword flags = asym_ptr->flags;
5035 /* When gas creates relocations against local labels, it creates its
5036 own symbol for the section, but does put the symbol into the
5037 symbol chain, so udata is 0. When the linker is generating
5038 relocatable output, this section symbol may be for one of the
5039 input sections rather than the output section. */
5040 if (asym_ptr->udata.i == 0
5041 && (flags & BSF_SECTION_SYM)
5042 && asym_ptr->section)
5047 sec = asym_ptr->section;
5048 if (sec->owner != abfd && sec->output_section != NULL)
5049 sec = sec->output_section;
5050 if (sec->owner == abfd
5051 && (indx = sec->index) < elf_num_section_syms (abfd)
5052 && elf_section_syms (abfd)[indx] != NULL)
5053 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5056 idx = asym_ptr->udata.i;
5060 /* This case can occur when using --strip-symbol on a symbol
5061 which is used in a relocation entry. */
5062 (*_bfd_error_handler)
5063 (_("%B: symbol `%s' required but not present"),
5064 abfd, bfd_asymbol_name (asym_ptr));
5065 bfd_set_error (bfd_error_no_symbols);
5072 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5073 (long) asym_ptr, asym_ptr->name, idx, flags,
5074 elf_symbol_flags (flags));
5082 /* Rewrite program header information. */
5085 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
5087 Elf_Internal_Ehdr *iehdr;
5088 struct elf_segment_map *map;
5089 struct elf_segment_map *map_first;
5090 struct elf_segment_map **pointer_to_map;
5091 Elf_Internal_Phdr *segment;
5094 unsigned int num_segments;
5095 bfd_boolean phdr_included = FALSE;
5096 bfd_boolean p_paddr_valid;
5097 bfd_vma maxpagesize;
5098 struct elf_segment_map *phdr_adjust_seg = NULL;
5099 unsigned int phdr_adjust_num = 0;
5100 const struct elf_backend_data *bed;
5102 bed = get_elf_backend_data (ibfd);
5103 iehdr = elf_elfheader (ibfd);
5106 pointer_to_map = &map_first;
5108 num_segments = elf_elfheader (ibfd)->e_phnum;
5109 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5111 /* Returns the end address of the segment + 1. */
5112 #define SEGMENT_END(segment, start) \
5113 (start + (segment->p_memsz > segment->p_filesz \
5114 ? segment->p_memsz : segment->p_filesz))
5116 #define SECTION_SIZE(section, segment) \
5117 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5118 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5119 ? section->size : 0)
5121 /* Returns TRUE if the given section is contained within
5122 the given segment. VMA addresses are compared. */
5123 #define IS_CONTAINED_BY_VMA(section, segment) \
5124 (section->vma >= segment->p_vaddr \
5125 && (section->vma + SECTION_SIZE (section, segment) \
5126 <= (SEGMENT_END (segment, segment->p_vaddr))))
5128 /* Returns TRUE if the given section is contained within
5129 the given segment. LMA addresses are compared. */
5130 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5131 (section->lma >= base \
5132 && (section->lma + SECTION_SIZE (section, segment) \
5133 <= SEGMENT_END (segment, base)))
5135 /* Handle PT_NOTE segment. */
5136 #define IS_NOTE(p, s) \
5137 (p->p_type == PT_NOTE \
5138 && elf_section_type (s) == SHT_NOTE \
5139 && (bfd_vma) s->filepos >= p->p_offset \
5140 && ((bfd_vma) s->filepos + s->size \
5141 <= p->p_offset + p->p_filesz))
5143 /* Special case: corefile "NOTE" section containing regs, prpsinfo
5145 #define IS_COREFILE_NOTE(p, s) \
5147 && bfd_get_format (ibfd) == bfd_core \
5151 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5152 linker, which generates a PT_INTERP section with p_vaddr and
5153 p_memsz set to 0. */
5154 #define IS_SOLARIS_PT_INTERP(p, s) \
5156 && p->p_paddr == 0 \
5157 && p->p_memsz == 0 \
5158 && p->p_filesz > 0 \
5159 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5161 && (bfd_vma) s->filepos >= p->p_offset \
5162 && ((bfd_vma) s->filepos + s->size \
5163 <= p->p_offset + p->p_filesz))
5165 /* Decide if the given section should be included in the given segment.
5166 A section will be included if:
5167 1. It is within the address space of the segment -- we use the LMA
5168 if that is set for the segment and the VMA otherwise,
5169 2. It is an allocated section or a NOTE section in a PT_NOTE
5171 3. There is an output section associated with it,
5172 4. The section has not already been allocated to a previous segment.
5173 5. PT_GNU_STACK segments do not include any sections.
5174 6. PT_TLS segment includes only SHF_TLS sections.
5175 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5176 8. PT_DYNAMIC should not contain empty sections at the beginning
5177 (with the possible exception of .dynamic). */
5178 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5179 ((((segment->p_paddr \
5180 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5181 : IS_CONTAINED_BY_VMA (section, segment)) \
5182 && (section->flags & SEC_ALLOC) != 0) \
5183 || IS_NOTE (segment, section)) \
5184 && segment->p_type != PT_GNU_STACK \
5185 && (segment->p_type != PT_TLS \
5186 || (section->flags & SEC_THREAD_LOCAL)) \
5187 && (segment->p_type == PT_LOAD \
5188 || segment->p_type == PT_TLS \
5189 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5190 && (segment->p_type != PT_DYNAMIC \
5191 || SECTION_SIZE (section, segment) > 0 \
5192 || (segment->p_paddr \
5193 ? segment->p_paddr != section->lma \
5194 : segment->p_vaddr != section->vma) \
5195 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5197 && !section->segment_mark)
5199 /* If the output section of a section in the input segment is NULL,
5200 it is removed from the corresponding output segment. */
5201 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5202 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5203 && section->output_section != NULL)
5205 /* Returns TRUE iff seg1 starts after the end of seg2. */
5206 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5207 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5209 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5210 their VMA address ranges and their LMA address ranges overlap.
5211 It is possible to have overlapping VMA ranges without overlapping LMA
5212 ranges. RedBoot images for example can have both .data and .bss mapped
5213 to the same VMA range, but with the .data section mapped to a different
5215 #define SEGMENT_OVERLAPS(seg1, seg2) \
5216 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5217 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5218 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5219 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5221 /* Initialise the segment mark field. */
5222 for (section = ibfd->sections; section != NULL; section = section->next)
5223 section->segment_mark = FALSE;
5225 /* The Solaris linker creates program headers in which all the
5226 p_paddr fields are zero. When we try to objcopy or strip such a
5227 file, we get confused. Check for this case, and if we find it
5228 don't set the p_paddr_valid fields. */
5229 p_paddr_valid = FALSE;
5230 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5233 if (segment->p_paddr != 0)
5235 p_paddr_valid = TRUE;
5239 /* Scan through the segments specified in the program header
5240 of the input BFD. For this first scan we look for overlaps
5241 in the loadable segments. These can be created by weird
5242 parameters to objcopy. Also, fix some solaris weirdness. */
5243 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5248 Elf_Internal_Phdr *segment2;
5250 if (segment->p_type == PT_INTERP)
5251 for (section = ibfd->sections; section; section = section->next)
5252 if (IS_SOLARIS_PT_INTERP (segment, section))
5254 /* Mininal change so that the normal section to segment
5255 assignment code will work. */
5256 segment->p_vaddr = section->vma;
5260 if (segment->p_type != PT_LOAD)
5262 /* Remove PT_GNU_RELRO segment. */
5263 if (segment->p_type == PT_GNU_RELRO)
5264 segment->p_type = PT_NULL;
5268 /* Determine if this segment overlaps any previous segments. */
5269 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++)
5271 bfd_signed_vma extra_length;
5273 if (segment2->p_type != PT_LOAD
5274 || !SEGMENT_OVERLAPS (segment, segment2))
5277 /* Merge the two segments together. */
5278 if (segment2->p_vaddr < segment->p_vaddr)
5280 /* Extend SEGMENT2 to include SEGMENT and then delete
5282 extra_length = (SEGMENT_END (segment, segment->p_vaddr)
5283 - SEGMENT_END (segment2, segment2->p_vaddr));
5285 if (extra_length > 0)
5287 segment2->p_memsz += extra_length;
5288 segment2->p_filesz += extra_length;
5291 segment->p_type = PT_NULL;
5293 /* Since we have deleted P we must restart the outer loop. */
5295 segment = elf_tdata (ibfd)->phdr;
5300 /* Extend SEGMENT to include SEGMENT2 and then delete
5302 extra_length = (SEGMENT_END (segment2, segment2->p_vaddr)
5303 - SEGMENT_END (segment, segment->p_vaddr));
5305 if (extra_length > 0)
5307 segment->p_memsz += extra_length;
5308 segment->p_filesz += extra_length;
5311 segment2->p_type = PT_NULL;
5316 /* The second scan attempts to assign sections to segments. */
5317 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5321 unsigned int section_count;
5322 asection **sections;
5323 asection *output_section;
5325 bfd_vma matching_lma;
5326 bfd_vma suggested_lma;
5329 asection *first_section;
5330 bfd_boolean first_matching_lma;
5331 bfd_boolean first_suggested_lma;
5333 if (segment->p_type == PT_NULL)
5336 first_section = NULL;
5337 /* Compute how many sections might be placed into this segment. */
5338 for (section = ibfd->sections, section_count = 0;
5340 section = section->next)
5342 /* Find the first section in the input segment, which may be
5343 removed from the corresponding output segment. */
5344 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5346 if (first_section == NULL)
5347 first_section = section;
5348 if (section->output_section != NULL)
5353 /* Allocate a segment map big enough to contain
5354 all of the sections we have selected. */
5355 amt = sizeof (struct elf_segment_map);
5356 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5357 map = bfd_zalloc (obfd, amt);
5361 /* Initialise the fields of the segment map. Default to
5362 using the physical address of the segment in the input BFD. */
5364 map->p_type = segment->p_type;
5365 map->p_flags = segment->p_flags;
5366 map->p_flags_valid = 1;
5368 /* If the first section in the input segment is removed, there is
5369 no need to preserve segment physical address in the corresponding
5371 if (!first_section || first_section->output_section != NULL)
5373 map->p_paddr = segment->p_paddr;
5374 map->p_paddr_valid = p_paddr_valid;
5377 /* Determine if this segment contains the ELF file header
5378 and if it contains the program headers themselves. */
5379 map->includes_filehdr = (segment->p_offset == 0
5380 && segment->p_filesz >= iehdr->e_ehsize);
5381 map->includes_phdrs = 0;
5383 if (!phdr_included || segment->p_type != PT_LOAD)
5385 map->includes_phdrs =
5386 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5387 && (segment->p_offset + segment->p_filesz
5388 >= ((bfd_vma) iehdr->e_phoff
5389 + iehdr->e_phnum * iehdr->e_phentsize)));
5391 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5392 phdr_included = TRUE;
5395 if (section_count == 0)
5397 /* Special segments, such as the PT_PHDR segment, may contain
5398 no sections, but ordinary, loadable segments should contain
5399 something. They are allowed by the ELF spec however, so only
5400 a warning is produced. */
5401 if (segment->p_type == PT_LOAD)
5402 (*_bfd_error_handler) (_("%B: warning: Empty loadable segment"
5403 " detected, is this intentional ?\n"),
5407 *pointer_to_map = map;
5408 pointer_to_map = &map->next;
5413 /* Now scan the sections in the input BFD again and attempt
5414 to add their corresponding output sections to the segment map.
5415 The problem here is how to handle an output section which has
5416 been moved (ie had its LMA changed). There are four possibilities:
5418 1. None of the sections have been moved.
5419 In this case we can continue to use the segment LMA from the
5422 2. All of the sections have been moved by the same amount.
5423 In this case we can change the segment's LMA to match the LMA
5424 of the first section.
5426 3. Some of the sections have been moved, others have not.
5427 In this case those sections which have not been moved can be
5428 placed in the current segment which will have to have its size,
5429 and possibly its LMA changed, and a new segment or segments will
5430 have to be created to contain the other sections.
5432 4. The sections have been moved, but not by the same amount.
5433 In this case we can change the segment's LMA to match the LMA
5434 of the first section and we will have to create a new segment
5435 or segments to contain the other sections.
5437 In order to save time, we allocate an array to hold the section
5438 pointers that we are interested in. As these sections get assigned
5439 to a segment, they are removed from this array. */
5441 sections = bfd_malloc2 (section_count, sizeof (asection *));
5442 if (sections == NULL)
5445 /* Step One: Scan for segment vs section LMA conflicts.
5446 Also add the sections to the section array allocated above.
5447 Also add the sections to the current segment. In the common
5448 case, where the sections have not been moved, this means that
5449 we have completely filled the segment, and there is nothing
5454 first_matching_lma = TRUE;
5455 first_suggested_lma = TRUE;
5457 for (section = ibfd->sections;
5459 section = section->next)
5460 if (section == first_section)
5463 for (j = 0; section != NULL; section = section->next)
5465 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5467 output_section = section->output_section;
5469 sections[j++] = section;
5471 /* The Solaris native linker always sets p_paddr to 0.
5472 We try to catch that case here, and set it to the
5473 correct value. Note - some backends require that
5474 p_paddr be left as zero. */
5476 && segment->p_vaddr != 0
5477 && !bed->want_p_paddr_set_to_zero
5479 && output_section->lma != 0
5480 && output_section->vma == (segment->p_vaddr
5481 + (map->includes_filehdr
5484 + (map->includes_phdrs
5486 * iehdr->e_phentsize)
5488 map->p_paddr = segment->p_vaddr;
5490 /* Match up the physical address of the segment with the
5491 LMA address of the output section. */
5492 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5493 || IS_COREFILE_NOTE (segment, section)
5494 || (bed->want_p_paddr_set_to_zero
5495 && IS_CONTAINED_BY_VMA (output_section, segment)))
5497 if (first_matching_lma || output_section->lma < matching_lma)
5499 matching_lma = output_section->lma;
5500 first_matching_lma = FALSE;
5503 /* We assume that if the section fits within the segment
5504 then it does not overlap any other section within that
5506 map->sections[isec++] = output_section;
5508 else if (first_suggested_lma)
5510 suggested_lma = output_section->lma;
5511 first_suggested_lma = FALSE;
5514 if (j == section_count)
5519 BFD_ASSERT (j == section_count);
5521 /* Step Two: Adjust the physical address of the current segment,
5523 if (isec == section_count)
5525 /* All of the sections fitted within the segment as currently
5526 specified. This is the default case. Add the segment to
5527 the list of built segments and carry on to process the next
5528 program header in the input BFD. */
5529 map->count = section_count;
5530 *pointer_to_map = map;
5531 pointer_to_map = &map->next;
5534 && !bed->want_p_paddr_set_to_zero
5535 && matching_lma != map->p_paddr
5536 && !map->includes_filehdr
5537 && !map->includes_phdrs)
5538 /* There is some padding before the first section in the
5539 segment. So, we must account for that in the output
5541 map->p_vaddr_offset = matching_lma - map->p_paddr;
5548 if (!first_matching_lma)
5550 /* At least one section fits inside the current segment.
5551 Keep it, but modify its physical address to match the
5552 LMA of the first section that fitted. */
5553 map->p_paddr = matching_lma;
5557 /* None of the sections fitted inside the current segment.
5558 Change the current segment's physical address to match
5559 the LMA of the first section. */
5560 map->p_paddr = suggested_lma;
5563 /* Offset the segment physical address from the lma
5564 to allow for space taken up by elf headers. */
5565 if (map->includes_filehdr)
5567 if (map->p_paddr >= iehdr->e_ehsize)
5568 map->p_paddr -= iehdr->e_ehsize;
5571 map->includes_filehdr = FALSE;
5572 map->includes_phdrs = FALSE;
5576 if (map->includes_phdrs)
5578 if (map->p_paddr >= iehdr->e_phnum * iehdr->e_phentsize)
5580 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5582 /* iehdr->e_phnum is just an estimate of the number
5583 of program headers that we will need. Make a note
5584 here of the number we used and the segment we chose
5585 to hold these headers, so that we can adjust the
5586 offset when we know the correct value. */
5587 phdr_adjust_num = iehdr->e_phnum;
5588 phdr_adjust_seg = map;
5591 map->includes_phdrs = FALSE;
5595 /* Step Three: Loop over the sections again, this time assigning
5596 those that fit to the current segment and removing them from the
5597 sections array; but making sure not to leave large gaps. Once all
5598 possible sections have been assigned to the current segment it is
5599 added to the list of built segments and if sections still remain
5600 to be assigned, a new segment is constructed before repeating
5607 first_suggested_lma = TRUE;
5609 /* Fill the current segment with sections that fit. */
5610 for (j = 0; j < section_count; j++)
5612 section = sections[j];
5614 if (section == NULL)
5617 output_section = section->output_section;
5619 BFD_ASSERT (output_section != NULL);
5621 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5622 || IS_COREFILE_NOTE (segment, section))
5624 if (map->count == 0)
5626 /* If the first section in a segment does not start at
5627 the beginning of the segment, then something is
5629 if (output_section->lma
5631 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5632 + (map->includes_phdrs
5633 ? iehdr->e_phnum * iehdr->e_phentsize
5641 prev_sec = map->sections[map->count - 1];
5643 /* If the gap between the end of the previous section
5644 and the start of this section is more than
5645 maxpagesize then we need to start a new segment. */
5646 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5648 < BFD_ALIGN (output_section->lma, maxpagesize))
5649 || (prev_sec->lma + prev_sec->size
5650 > output_section->lma))
5652 if (first_suggested_lma)
5654 suggested_lma = output_section->lma;
5655 first_suggested_lma = FALSE;
5662 map->sections[map->count++] = output_section;
5665 section->segment_mark = TRUE;
5667 else if (first_suggested_lma)
5669 suggested_lma = output_section->lma;
5670 first_suggested_lma = FALSE;
5674 BFD_ASSERT (map->count > 0);
5676 /* Add the current segment to the list of built segments. */
5677 *pointer_to_map = map;
5678 pointer_to_map = &map->next;
5680 if (isec < section_count)
5682 /* We still have not allocated all of the sections to
5683 segments. Create a new segment here, initialise it
5684 and carry on looping. */
5685 amt = sizeof (struct elf_segment_map);
5686 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5687 map = bfd_alloc (obfd, amt);
5694 /* Initialise the fields of the segment map. Set the physical
5695 physical address to the LMA of the first section that has
5696 not yet been assigned. */
5698 map->p_type = segment->p_type;
5699 map->p_flags = segment->p_flags;
5700 map->p_flags_valid = 1;
5701 map->p_paddr = suggested_lma;
5702 map->p_paddr_valid = p_paddr_valid;
5703 map->includes_filehdr = 0;
5704 map->includes_phdrs = 0;
5707 while (isec < section_count);
5712 elf_tdata (obfd)->segment_map = map_first;
5714 /* If we had to estimate the number of program headers that were
5715 going to be needed, then check our estimate now and adjust
5716 the offset if necessary. */
5717 if (phdr_adjust_seg != NULL)
5721 for (count = 0, map = map_first; map != NULL; map = map->next)
5724 if (count > phdr_adjust_num)
5725 phdr_adjust_seg->p_paddr
5726 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5731 #undef IS_CONTAINED_BY_VMA
5732 #undef IS_CONTAINED_BY_LMA
5734 #undef IS_COREFILE_NOTE
5735 #undef IS_SOLARIS_PT_INTERP
5736 #undef IS_SECTION_IN_INPUT_SEGMENT
5737 #undef INCLUDE_SECTION_IN_SEGMENT
5738 #undef SEGMENT_AFTER_SEGMENT
5739 #undef SEGMENT_OVERLAPS
5743 /* Copy ELF program header information. */
5746 copy_elf_program_header (bfd *ibfd, bfd *obfd)
5748 Elf_Internal_Ehdr *iehdr;
5749 struct elf_segment_map *map;
5750 struct elf_segment_map *map_first;
5751 struct elf_segment_map **pointer_to_map;
5752 Elf_Internal_Phdr *segment;
5754 unsigned int num_segments;
5755 bfd_boolean phdr_included = FALSE;
5756 bfd_boolean p_paddr_valid;
5758 iehdr = elf_elfheader (ibfd);
5761 pointer_to_map = &map_first;
5763 /* If all the segment p_paddr fields are zero, don't set
5764 map->p_paddr_valid. */
5765 p_paddr_valid = FALSE;
5766 num_segments = elf_elfheader (ibfd)->e_phnum;
5767 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5770 if (segment->p_paddr != 0)
5772 p_paddr_valid = TRUE;
5776 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5781 unsigned int section_count;
5783 Elf_Internal_Shdr *this_hdr;
5784 asection *first_section = NULL;
5785 asection *lowest_section = NULL;
5787 /* Compute how many sections are in this segment. */
5788 for (section = ibfd->sections, section_count = 0;
5790 section = section->next)
5792 this_hdr = &(elf_section_data(section)->this_hdr);
5793 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5796 first_section = lowest_section = section;
5797 if (section->lma < lowest_section->lma)
5798 lowest_section = section;
5803 /* Allocate a segment map big enough to contain
5804 all of the sections we have selected. */
5805 amt = sizeof (struct elf_segment_map);
5806 if (section_count != 0)
5807 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5808 map = bfd_zalloc (obfd, amt);
5812 /* Initialize the fields of the output segment map with the
5815 map->p_type = segment->p_type;
5816 map->p_flags = segment->p_flags;
5817 map->p_flags_valid = 1;
5818 map->p_paddr = segment->p_paddr;
5819 map->p_paddr_valid = p_paddr_valid;
5820 map->p_align = segment->p_align;
5821 map->p_align_valid = 1;
5822 map->p_vaddr_offset = 0;
5824 if (map->p_type == PT_GNU_RELRO
5825 && segment->p_filesz == segment->p_memsz)
5827 /* The PT_GNU_RELRO segment may contain the first a few
5828 bytes in the .got.plt section even if the whole .got.plt
5829 section isn't in the PT_GNU_RELRO segment. We won't
5830 change the size of the PT_GNU_RELRO segment. */
5831 map->p_size = segment->p_filesz;
5832 map->p_size_valid = 1;
5835 /* Determine if this segment contains the ELF file header
5836 and if it contains the program headers themselves. */
5837 map->includes_filehdr = (segment->p_offset == 0
5838 && segment->p_filesz >= iehdr->e_ehsize);
5840 map->includes_phdrs = 0;
5841 if (! phdr_included || segment->p_type != PT_LOAD)
5843 map->includes_phdrs =
5844 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5845 && (segment->p_offset + segment->p_filesz
5846 >= ((bfd_vma) iehdr->e_phoff
5847 + iehdr->e_phnum * iehdr->e_phentsize)));
5849 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5850 phdr_included = TRUE;
5853 if (!map->includes_phdrs
5854 && !map->includes_filehdr
5855 && map->p_paddr_valid)
5856 /* There is some other padding before the first section. */
5857 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
5858 - segment->p_paddr);
5860 if (section_count != 0)
5862 unsigned int isec = 0;
5864 for (section = first_section;
5866 section = section->next)
5868 this_hdr = &(elf_section_data(section)->this_hdr);
5869 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5871 map->sections[isec++] = section->output_section;
5872 if (isec == section_count)
5878 map->count = section_count;
5879 *pointer_to_map = map;
5880 pointer_to_map = &map->next;
5883 elf_tdata (obfd)->segment_map = map_first;
5887 /* Copy private BFD data. This copies or rewrites ELF program header
5891 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5893 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5894 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5897 if (elf_tdata (ibfd)->phdr == NULL)
5900 if (ibfd->xvec == obfd->xvec)
5902 /* Check to see if any sections in the input BFD
5903 covered by ELF program header have changed. */
5904 Elf_Internal_Phdr *segment;
5905 asection *section, *osec;
5906 unsigned int i, num_segments;
5907 Elf_Internal_Shdr *this_hdr;
5908 const struct elf_backend_data *bed;
5910 bed = get_elf_backend_data (ibfd);
5912 /* Regenerate the segment map if p_paddr is set to 0. */
5913 if (bed->want_p_paddr_set_to_zero)
5916 /* Initialize the segment mark field. */
5917 for (section = obfd->sections; section != NULL;
5918 section = section->next)
5919 section->segment_mark = FALSE;
5921 num_segments = elf_elfheader (ibfd)->e_phnum;
5922 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5926 /* PR binutils/3535. The Solaris linker always sets the p_paddr
5927 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
5928 which severly confuses things, so always regenerate the segment
5929 map in this case. */
5930 if (segment->p_paddr == 0
5931 && segment->p_memsz == 0
5932 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
5935 for (section = ibfd->sections;
5936 section != NULL; section = section->next)
5938 /* We mark the output section so that we know it comes
5939 from the input BFD. */
5940 osec = section->output_section;
5942 osec->segment_mark = TRUE;
5944 /* Check if this section is covered by the segment. */
5945 this_hdr = &(elf_section_data(section)->this_hdr);
5946 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5948 /* FIXME: Check if its output section is changed or
5949 removed. What else do we need to check? */
5951 || section->flags != osec->flags
5952 || section->lma != osec->lma
5953 || section->vma != osec->vma
5954 || section->size != osec->size
5955 || section->rawsize != osec->rawsize
5956 || section->alignment_power != osec->alignment_power)
5962 /* Check to see if any output section do not come from the
5964 for (section = obfd->sections; section != NULL;
5965 section = section->next)
5967 if (section->segment_mark == FALSE)
5970 section->segment_mark = FALSE;
5973 return copy_elf_program_header (ibfd, obfd);
5977 return rewrite_elf_program_header (ibfd, obfd);
5980 /* Initialize private output section information from input section. */
5983 _bfd_elf_init_private_section_data (bfd *ibfd,
5987 struct bfd_link_info *link_info)
5990 Elf_Internal_Shdr *ihdr, *ohdr;
5991 bfd_boolean need_group = link_info == NULL || link_info->relocatable;
5993 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5994 || obfd->xvec->flavour != bfd_target_elf_flavour)
5997 /* Don't copy the output ELF section type from input if the
5998 output BFD section flags have been set to something different.
5999 elf_fake_sections will set ELF section type based on BFD
6001 if (elf_section_type (osec) == SHT_NULL
6002 && (osec->flags == isec->flags || !osec->flags))
6003 elf_section_type (osec) = elf_section_type (isec);
6005 /* FIXME: Is this correct for all OS/PROC specific flags? */
6006 elf_section_flags (osec) |= (elf_section_flags (isec)
6007 & (SHF_MASKOS | SHF_MASKPROC));
6009 /* Set things up for objcopy and relocatable link. The output
6010 SHT_GROUP section will have its elf_next_in_group pointing back
6011 to the input group members. Ignore linker created group section.
6012 See elfNN_ia64_object_p in elfxx-ia64.c. */
6015 if (elf_sec_group (isec) == NULL
6016 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
6018 if (elf_section_flags (isec) & SHF_GROUP)
6019 elf_section_flags (osec) |= SHF_GROUP;
6020 elf_next_in_group (osec) = elf_next_in_group (isec);
6021 elf_section_data (osec)->group = elf_section_data (isec)->group;
6025 ihdr = &elf_section_data (isec)->this_hdr;
6027 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
6028 don't use the output section of the linked-to section since it
6029 may be NULL at this point. */
6030 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
6032 ohdr = &elf_section_data (osec)->this_hdr;
6033 ohdr->sh_flags |= SHF_LINK_ORDER;
6034 elf_linked_to_section (osec) = elf_linked_to_section (isec);
6037 osec->use_rela_p = isec->use_rela_p;
6042 /* Copy private section information. This copies over the entsize
6043 field, and sometimes the info field. */
6046 _bfd_elf_copy_private_section_data (bfd *ibfd,
6051 Elf_Internal_Shdr *ihdr, *ohdr;
6053 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6054 || obfd->xvec->flavour != bfd_target_elf_flavour)
6057 ihdr = &elf_section_data (isec)->this_hdr;
6058 ohdr = &elf_section_data (osec)->this_hdr;
6060 ohdr->sh_entsize = ihdr->sh_entsize;
6062 if (ihdr->sh_type == SHT_SYMTAB
6063 || ihdr->sh_type == SHT_DYNSYM
6064 || ihdr->sh_type == SHT_GNU_verneed
6065 || ihdr->sh_type == SHT_GNU_verdef)
6066 ohdr->sh_info = ihdr->sh_info;
6068 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
6072 /* Copy private header information. */
6075 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
6079 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6080 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6083 /* Copy over private BFD data if it has not already been copied.
6084 This must be done here, rather than in the copy_private_bfd_data
6085 entry point, because the latter is called after the section
6086 contents have been set, which means that the program headers have
6087 already been worked out. */
6088 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
6090 if (! copy_private_bfd_data (ibfd, obfd))
6094 /* _bfd_elf_copy_private_section_data copied over the SHF_GROUP flag
6095 but this might be wrong if we deleted the group section. */
6096 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
6097 if (elf_section_type (isec) == SHT_GROUP
6098 && isec->output_section == NULL)
6100 asection *first = elf_next_in_group (isec);
6101 asection *s = first;
6104 if (s->output_section != NULL)
6106 elf_section_flags (s->output_section) &= ~SHF_GROUP;
6107 elf_group_name (s->output_section) = NULL;
6109 s = elf_next_in_group (s);
6118 /* Copy private symbol information. If this symbol is in a section
6119 which we did not map into a BFD section, try to map the section
6120 index correctly. We use special macro definitions for the mapped
6121 section indices; these definitions are interpreted by the
6122 swap_out_syms function. */
6124 #define MAP_ONESYMTAB (SHN_HIOS + 1)
6125 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
6126 #define MAP_STRTAB (SHN_HIOS + 3)
6127 #define MAP_SHSTRTAB (SHN_HIOS + 4)
6128 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
6131 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
6136 elf_symbol_type *isym, *osym;
6138 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6139 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6142 isym = elf_symbol_from (ibfd, isymarg);
6143 osym = elf_symbol_from (obfd, osymarg);
6146 && isym->internal_elf_sym.st_shndx != 0
6148 && bfd_is_abs_section (isym->symbol.section))
6152 shndx = isym->internal_elf_sym.st_shndx;
6153 if (shndx == elf_onesymtab (ibfd))
6154 shndx = MAP_ONESYMTAB;
6155 else if (shndx == elf_dynsymtab (ibfd))
6156 shndx = MAP_DYNSYMTAB;
6157 else if (shndx == elf_tdata (ibfd)->strtab_section)
6159 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
6160 shndx = MAP_SHSTRTAB;
6161 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
6162 shndx = MAP_SYM_SHNDX;
6163 osym->internal_elf_sym.st_shndx = shndx;
6169 /* Swap out the symbols. */
6172 swap_out_syms (bfd *abfd,
6173 struct bfd_strtab_hash **sttp,
6176 const struct elf_backend_data *bed;
6179 struct bfd_strtab_hash *stt;
6180 Elf_Internal_Shdr *symtab_hdr;
6181 Elf_Internal_Shdr *symtab_shndx_hdr;
6182 Elf_Internal_Shdr *symstrtab_hdr;
6183 bfd_byte *outbound_syms;
6184 bfd_byte *outbound_shndx;
6187 bfd_boolean name_local_sections;
6189 if (!elf_map_symbols (abfd))
6192 /* Dump out the symtabs. */
6193 stt = _bfd_elf_stringtab_init ();
6197 bed = get_elf_backend_data (abfd);
6198 symcount = bfd_get_symcount (abfd);
6199 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6200 symtab_hdr->sh_type = SHT_SYMTAB;
6201 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6202 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6203 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
6204 symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
6206 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6207 symstrtab_hdr->sh_type = SHT_STRTAB;
6209 outbound_syms = bfd_alloc2 (abfd, 1 + symcount, bed->s->sizeof_sym);
6210 if (outbound_syms == NULL)
6212 _bfd_stringtab_free (stt);
6215 symtab_hdr->contents = outbound_syms;
6217 outbound_shndx = NULL;
6218 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6219 if (symtab_shndx_hdr->sh_name != 0)
6221 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6222 outbound_shndx = bfd_zalloc2 (abfd, 1 + symcount,
6223 sizeof (Elf_External_Sym_Shndx));
6224 if (outbound_shndx == NULL)
6226 _bfd_stringtab_free (stt);
6230 symtab_shndx_hdr->contents = outbound_shndx;
6231 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6232 symtab_shndx_hdr->sh_size = amt;
6233 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6234 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6237 /* Now generate the data (for "contents"). */
6239 /* Fill in zeroth symbol and swap it out. */
6240 Elf_Internal_Sym sym;
6246 sym.st_shndx = SHN_UNDEF;
6247 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6248 outbound_syms += bed->s->sizeof_sym;
6249 if (outbound_shndx != NULL)
6250 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6254 = (bed->elf_backend_name_local_section_symbols
6255 && bed->elf_backend_name_local_section_symbols (abfd));
6257 syms = bfd_get_outsymbols (abfd);
6258 for (idx = 0; idx < symcount; idx++)
6260 Elf_Internal_Sym sym;
6261 bfd_vma value = syms[idx]->value;
6262 elf_symbol_type *type_ptr;
6263 flagword flags = syms[idx]->flags;
6266 if (!name_local_sections
6267 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6269 /* Local section symbols have no name. */
6274 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6277 if (sym.st_name == (unsigned long) -1)
6279 _bfd_stringtab_free (stt);
6284 type_ptr = elf_symbol_from (abfd, syms[idx]);
6286 if ((flags & BSF_SECTION_SYM) == 0
6287 && bfd_is_com_section (syms[idx]->section))
6289 /* ELF common symbols put the alignment into the `value' field,
6290 and the size into the `size' field. This is backwards from
6291 how BFD handles it, so reverse it here. */
6292 sym.st_size = value;
6293 if (type_ptr == NULL
6294 || type_ptr->internal_elf_sym.st_value == 0)
6295 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6297 sym.st_value = type_ptr->internal_elf_sym.st_value;
6298 sym.st_shndx = _bfd_elf_section_from_bfd_section
6299 (abfd, syms[idx]->section);
6303 asection *sec = syms[idx]->section;
6306 if (sec->output_section)
6308 value += sec->output_offset;
6309 sec = sec->output_section;
6312 /* Don't add in the section vma for relocatable output. */
6313 if (! relocatable_p)
6315 sym.st_value = value;
6316 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6318 if (bfd_is_abs_section (sec)
6320 && type_ptr->internal_elf_sym.st_shndx != 0)
6322 /* This symbol is in a real ELF section which we did
6323 not create as a BFD section. Undo the mapping done
6324 by copy_private_symbol_data. */
6325 shndx = type_ptr->internal_elf_sym.st_shndx;
6329 shndx = elf_onesymtab (abfd);
6332 shndx = elf_dynsymtab (abfd);
6335 shndx = elf_tdata (abfd)->strtab_section;
6338 shndx = elf_tdata (abfd)->shstrtab_section;
6341 shndx = elf_tdata (abfd)->symtab_shndx_section;
6349 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6351 if (shndx == SHN_BAD)
6355 /* Writing this would be a hell of a lot easier if
6356 we had some decent documentation on bfd, and
6357 knew what to expect of the library, and what to
6358 demand of applications. For example, it
6359 appears that `objcopy' might not set the
6360 section of a symbol to be a section that is
6361 actually in the output file. */
6362 sec2 = bfd_get_section_by_name (abfd, sec->name);
6365 _bfd_error_handler (_("\
6366 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6367 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6369 bfd_set_error (bfd_error_invalid_operation);
6370 _bfd_stringtab_free (stt);
6374 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6375 BFD_ASSERT (shndx != SHN_BAD);
6379 sym.st_shndx = shndx;
6382 if ((flags & BSF_THREAD_LOCAL) != 0)
6384 else if ((flags & BSF_FUNCTION) != 0)
6386 else if ((flags & BSF_OBJECT) != 0)
6388 else if ((flags & BSF_RELC) != 0)
6390 else if ((flags & BSF_SRELC) != 0)
6395 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6398 /* Processor-specific types. */
6399 if (type_ptr != NULL
6400 && bed->elf_backend_get_symbol_type)
6401 type = ((*bed->elf_backend_get_symbol_type)
6402 (&type_ptr->internal_elf_sym, type));
6404 if (flags & BSF_SECTION_SYM)
6406 if (flags & BSF_GLOBAL)
6407 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6409 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6411 else if (bfd_is_com_section (syms[idx]->section))
6413 #ifdef USE_STT_COMMON
6414 if (type == STT_OBJECT)
6415 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_COMMON);
6418 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6421 else if (bfd_is_und_section (syms[idx]->section))
6422 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6426 else if (flags & BSF_FILE)
6427 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6430 int bind = STB_LOCAL;
6432 if (flags & BSF_LOCAL)
6434 else if (flags & BSF_WEAK)
6436 else if (flags & BSF_GLOBAL)
6439 sym.st_info = ELF_ST_INFO (bind, type);
6442 if (type_ptr != NULL)
6443 sym.st_other = type_ptr->internal_elf_sym.st_other;
6447 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6448 outbound_syms += bed->s->sizeof_sym;
6449 if (outbound_shndx != NULL)
6450 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6454 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6455 symstrtab_hdr->sh_type = SHT_STRTAB;
6457 symstrtab_hdr->sh_flags = 0;
6458 symstrtab_hdr->sh_addr = 0;
6459 symstrtab_hdr->sh_entsize = 0;
6460 symstrtab_hdr->sh_link = 0;
6461 symstrtab_hdr->sh_info = 0;
6462 symstrtab_hdr->sh_addralign = 1;
6467 /* Return the number of bytes required to hold the symtab vector.
6469 Note that we base it on the count plus 1, since we will null terminate
6470 the vector allocated based on this size. However, the ELF symbol table
6471 always has a dummy entry as symbol #0, so it ends up even. */
6474 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6478 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6480 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6481 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6483 symtab_size -= sizeof (asymbol *);
6489 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6493 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6495 if (elf_dynsymtab (abfd) == 0)
6497 bfd_set_error (bfd_error_invalid_operation);
6501 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6502 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6504 symtab_size -= sizeof (asymbol *);
6510 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6513 return (asect->reloc_count + 1) * sizeof (arelent *);
6516 /* Canonicalize the relocs. */
6519 _bfd_elf_canonicalize_reloc (bfd *abfd,
6526 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6528 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6531 tblptr = section->relocation;
6532 for (i = 0; i < section->reloc_count; i++)
6533 *relptr++ = tblptr++;
6537 return section->reloc_count;
6541 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6543 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6544 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6547 bfd_get_symcount (abfd) = symcount;
6552 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6553 asymbol **allocation)
6555 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6556 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6559 bfd_get_dynamic_symcount (abfd) = symcount;
6563 /* Return the size required for the dynamic reloc entries. Any loadable
6564 section that was actually installed in the BFD, and has type SHT_REL
6565 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6566 dynamic reloc section. */
6569 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6574 if (elf_dynsymtab (abfd) == 0)
6576 bfd_set_error (bfd_error_invalid_operation);
6580 ret = sizeof (arelent *);
6581 for (s = abfd->sections; s != NULL; s = s->next)
6582 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6583 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6584 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6585 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6586 * sizeof (arelent *));
6591 /* Canonicalize the dynamic relocation entries. Note that we return the
6592 dynamic relocations as a single block, although they are actually
6593 associated with particular sections; the interface, which was
6594 designed for SunOS style shared libraries, expects that there is only
6595 one set of dynamic relocs. Any loadable section that was actually
6596 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6597 dynamic symbol table, is considered to be a dynamic reloc section. */
6600 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6604 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6608 if (elf_dynsymtab (abfd) == 0)
6610 bfd_set_error (bfd_error_invalid_operation);
6614 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6616 for (s = abfd->sections; s != NULL; s = s->next)
6618 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6619 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6620 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6625 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6627 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6629 for (i = 0; i < count; i++)
6640 /* Read in the version information. */
6643 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6645 bfd_byte *contents = NULL;
6646 unsigned int freeidx = 0;
6648 if (elf_dynverref (abfd) != 0)
6650 Elf_Internal_Shdr *hdr;
6651 Elf_External_Verneed *everneed;
6652 Elf_Internal_Verneed *iverneed;
6654 bfd_byte *contents_end;
6656 hdr = &elf_tdata (abfd)->dynverref_hdr;
6658 elf_tdata (abfd)->verref = bfd_zalloc2 (abfd, hdr->sh_info,
6659 sizeof (Elf_Internal_Verneed));
6660 if (elf_tdata (abfd)->verref == NULL)
6663 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6665 contents = bfd_malloc (hdr->sh_size);
6666 if (contents == NULL)
6668 error_return_verref:
6669 elf_tdata (abfd)->verref = NULL;
6670 elf_tdata (abfd)->cverrefs = 0;
6673 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6674 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6675 goto error_return_verref;
6677 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6678 goto error_return_verref;
6680 BFD_ASSERT (sizeof (Elf_External_Verneed)
6681 == sizeof (Elf_External_Vernaux));
6682 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6683 everneed = (Elf_External_Verneed *) contents;
6684 iverneed = elf_tdata (abfd)->verref;
6685 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6687 Elf_External_Vernaux *evernaux;
6688 Elf_Internal_Vernaux *ivernaux;
6691 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6693 iverneed->vn_bfd = abfd;
6695 iverneed->vn_filename =
6696 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6698 if (iverneed->vn_filename == NULL)
6699 goto error_return_verref;
6701 if (iverneed->vn_cnt == 0)
6702 iverneed->vn_auxptr = NULL;
6705 iverneed->vn_auxptr = bfd_alloc2 (abfd, iverneed->vn_cnt,
6706 sizeof (Elf_Internal_Vernaux));
6707 if (iverneed->vn_auxptr == NULL)
6708 goto error_return_verref;
6711 if (iverneed->vn_aux
6712 > (size_t) (contents_end - (bfd_byte *) everneed))
6713 goto error_return_verref;
6715 evernaux = ((Elf_External_Vernaux *)
6716 ((bfd_byte *) everneed + iverneed->vn_aux));
6717 ivernaux = iverneed->vn_auxptr;
6718 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6720 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6722 ivernaux->vna_nodename =
6723 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6724 ivernaux->vna_name);
6725 if (ivernaux->vna_nodename == NULL)
6726 goto error_return_verref;
6728 if (j + 1 < iverneed->vn_cnt)
6729 ivernaux->vna_nextptr = ivernaux + 1;
6731 ivernaux->vna_nextptr = NULL;
6733 if (ivernaux->vna_next
6734 > (size_t) (contents_end - (bfd_byte *) evernaux))
6735 goto error_return_verref;
6737 evernaux = ((Elf_External_Vernaux *)
6738 ((bfd_byte *) evernaux + ivernaux->vna_next));
6740 if (ivernaux->vna_other > freeidx)
6741 freeidx = ivernaux->vna_other;
6744 if (i + 1 < hdr->sh_info)
6745 iverneed->vn_nextref = iverneed + 1;
6747 iverneed->vn_nextref = NULL;
6749 if (iverneed->vn_next
6750 > (size_t) (contents_end - (bfd_byte *) everneed))
6751 goto error_return_verref;
6753 everneed = ((Elf_External_Verneed *)
6754 ((bfd_byte *) everneed + iverneed->vn_next));
6761 if (elf_dynverdef (abfd) != 0)
6763 Elf_Internal_Shdr *hdr;
6764 Elf_External_Verdef *everdef;
6765 Elf_Internal_Verdef *iverdef;
6766 Elf_Internal_Verdef *iverdefarr;
6767 Elf_Internal_Verdef iverdefmem;
6769 unsigned int maxidx;
6770 bfd_byte *contents_end_def, *contents_end_aux;
6772 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6774 contents = bfd_malloc (hdr->sh_size);
6775 if (contents == NULL)
6777 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6778 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6781 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
6784 BFD_ASSERT (sizeof (Elf_External_Verdef)
6785 >= sizeof (Elf_External_Verdaux));
6786 contents_end_def = contents + hdr->sh_size
6787 - sizeof (Elf_External_Verdef);
6788 contents_end_aux = contents + hdr->sh_size
6789 - sizeof (Elf_External_Verdaux);
6791 /* We know the number of entries in the section but not the maximum
6792 index. Therefore we have to run through all entries and find
6794 everdef = (Elf_External_Verdef *) contents;
6796 for (i = 0; i < hdr->sh_info; ++i)
6798 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6800 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6801 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6803 if (iverdefmem.vd_next
6804 > (size_t) (contents_end_def - (bfd_byte *) everdef))
6807 everdef = ((Elf_External_Verdef *)
6808 ((bfd_byte *) everdef + iverdefmem.vd_next));
6811 if (default_imported_symver)
6813 if (freeidx > maxidx)
6818 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, maxidx,
6819 sizeof (Elf_Internal_Verdef));
6820 if (elf_tdata (abfd)->verdef == NULL)
6823 elf_tdata (abfd)->cverdefs = maxidx;
6825 everdef = (Elf_External_Verdef *) contents;
6826 iverdefarr = elf_tdata (abfd)->verdef;
6827 for (i = 0; i < hdr->sh_info; i++)
6829 Elf_External_Verdaux *everdaux;
6830 Elf_Internal_Verdaux *iverdaux;
6833 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6835 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
6837 error_return_verdef:
6838 elf_tdata (abfd)->verdef = NULL;
6839 elf_tdata (abfd)->cverdefs = 0;
6843 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6844 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6846 iverdef->vd_bfd = abfd;
6848 if (iverdef->vd_cnt == 0)
6849 iverdef->vd_auxptr = NULL;
6852 iverdef->vd_auxptr = bfd_alloc2 (abfd, iverdef->vd_cnt,
6853 sizeof (Elf_Internal_Verdaux));
6854 if (iverdef->vd_auxptr == NULL)
6855 goto error_return_verdef;
6859 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
6860 goto error_return_verdef;
6862 everdaux = ((Elf_External_Verdaux *)
6863 ((bfd_byte *) everdef + iverdef->vd_aux));
6864 iverdaux = iverdef->vd_auxptr;
6865 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6867 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6869 iverdaux->vda_nodename =
6870 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6871 iverdaux->vda_name);
6872 if (iverdaux->vda_nodename == NULL)
6873 goto error_return_verdef;
6875 if (j + 1 < iverdef->vd_cnt)
6876 iverdaux->vda_nextptr = iverdaux + 1;
6878 iverdaux->vda_nextptr = NULL;
6880 if (iverdaux->vda_next
6881 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
6882 goto error_return_verdef;
6884 everdaux = ((Elf_External_Verdaux *)
6885 ((bfd_byte *) everdaux + iverdaux->vda_next));
6888 if (iverdef->vd_cnt)
6889 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6891 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
6892 iverdef->vd_nextdef = iverdef + 1;
6894 iverdef->vd_nextdef = NULL;
6896 everdef = ((Elf_External_Verdef *)
6897 ((bfd_byte *) everdef + iverdef->vd_next));
6903 else if (default_imported_symver)
6910 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, freeidx,
6911 sizeof (Elf_Internal_Verdef));
6912 if (elf_tdata (abfd)->verdef == NULL)
6915 elf_tdata (abfd)->cverdefs = freeidx;
6918 /* Create a default version based on the soname. */
6919 if (default_imported_symver)
6921 Elf_Internal_Verdef *iverdef;
6922 Elf_Internal_Verdaux *iverdaux;
6924 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6926 iverdef->vd_version = VER_DEF_CURRENT;
6927 iverdef->vd_flags = 0;
6928 iverdef->vd_ndx = freeidx;
6929 iverdef->vd_cnt = 1;
6931 iverdef->vd_bfd = abfd;
6933 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6934 if (iverdef->vd_nodename == NULL)
6935 goto error_return_verdef;
6936 iverdef->vd_nextdef = NULL;
6937 iverdef->vd_auxptr = bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
6938 if (iverdef->vd_auxptr == NULL)
6939 goto error_return_verdef;
6941 iverdaux = iverdef->vd_auxptr;
6942 iverdaux->vda_nodename = iverdef->vd_nodename;
6943 iverdaux->vda_nextptr = NULL;
6949 if (contents != NULL)
6955 _bfd_elf_make_empty_symbol (bfd *abfd)
6957 elf_symbol_type *newsym;
6958 bfd_size_type amt = sizeof (elf_symbol_type);
6960 newsym = bfd_zalloc (abfd, amt);
6965 newsym->symbol.the_bfd = abfd;
6966 return &newsym->symbol;
6971 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
6975 bfd_symbol_info (symbol, ret);
6978 /* Return whether a symbol name implies a local symbol. Most targets
6979 use this function for the is_local_label_name entry point, but some
6983 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
6986 /* Normal local symbols start with ``.L''. */
6987 if (name[0] == '.' && name[1] == 'L')
6990 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6991 DWARF debugging symbols starting with ``..''. */
6992 if (name[0] == '.' && name[1] == '.')
6995 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6996 emitting DWARF debugging output. I suspect this is actually a
6997 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6998 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6999 underscore to be emitted on some ELF targets). For ease of use,
7000 we treat such symbols as local. */
7001 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
7008 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
7009 asymbol *symbol ATTRIBUTE_UNUSED)
7016 _bfd_elf_set_arch_mach (bfd *abfd,
7017 enum bfd_architecture arch,
7018 unsigned long machine)
7020 /* If this isn't the right architecture for this backend, and this
7021 isn't the generic backend, fail. */
7022 if (arch != get_elf_backend_data (abfd)->arch
7023 && arch != bfd_arch_unknown
7024 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
7027 return bfd_default_set_arch_mach (abfd, arch, machine);
7030 /* Find the function to a particular section and offset,
7031 for error reporting. */
7034 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
7038 const char **filename_ptr,
7039 const char **functionname_ptr)
7041 const char *filename;
7042 asymbol *func, *file;
7045 /* ??? Given multiple file symbols, it is impossible to reliably
7046 choose the right file name for global symbols. File symbols are
7047 local symbols, and thus all file symbols must sort before any
7048 global symbols. The ELF spec may be interpreted to say that a
7049 file symbol must sort before other local symbols, but currently
7050 ld -r doesn't do this. So, for ld -r output, it is possible to
7051 make a better choice of file name for local symbols by ignoring
7052 file symbols appearing after a given local symbol. */
7053 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
7059 state = nothing_seen;
7061 for (p = symbols; *p != NULL; p++)
7065 q = (elf_symbol_type *) *p;
7067 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
7073 if (state == symbol_seen)
7074 state = file_after_symbol_seen;
7078 if (bfd_get_section (&q->symbol) == section
7079 && q->symbol.value >= low_func
7080 && q->symbol.value <= offset)
7082 func = (asymbol *) q;
7083 low_func = q->symbol.value;
7086 && (ELF_ST_BIND (q->internal_elf_sym.st_info) == STB_LOCAL
7087 || state != file_after_symbol_seen))
7088 filename = bfd_asymbol_name (file);
7092 if (state == nothing_seen)
7093 state = symbol_seen;
7100 *filename_ptr = filename;
7101 if (functionname_ptr)
7102 *functionname_ptr = bfd_asymbol_name (func);
7107 /* Find the nearest line to a particular section and offset,
7108 for error reporting. */
7111 _bfd_elf_find_nearest_line (bfd *abfd,
7115 const char **filename_ptr,
7116 const char **functionname_ptr,
7117 unsigned int *line_ptr)
7121 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
7122 filename_ptr, functionname_ptr,
7125 if (!*functionname_ptr)
7126 elf_find_function (abfd, section, symbols, offset,
7127 *filename_ptr ? NULL : filename_ptr,
7133 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
7134 filename_ptr, functionname_ptr,
7136 &elf_tdata (abfd)->dwarf2_find_line_info))
7138 if (!*functionname_ptr)
7139 elf_find_function (abfd, section, symbols, offset,
7140 *filename_ptr ? NULL : filename_ptr,
7146 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7147 &found, filename_ptr,
7148 functionname_ptr, line_ptr,
7149 &elf_tdata (abfd)->line_info))
7151 if (found && (*functionname_ptr || *line_ptr))
7154 if (symbols == NULL)
7157 if (! elf_find_function (abfd, section, symbols, offset,
7158 filename_ptr, functionname_ptr))
7165 /* Find the line for a symbol. */
7168 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
7169 const char **filename_ptr, unsigned int *line_ptr)
7171 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
7172 filename_ptr, line_ptr, 0,
7173 &elf_tdata (abfd)->dwarf2_find_line_info);
7176 /* After a call to bfd_find_nearest_line, successive calls to
7177 bfd_find_inliner_info can be used to get source information about
7178 each level of function inlining that terminated at the address
7179 passed to bfd_find_nearest_line. Currently this is only supported
7180 for DWARF2 with appropriate DWARF3 extensions. */
7183 _bfd_elf_find_inliner_info (bfd *abfd,
7184 const char **filename_ptr,
7185 const char **functionname_ptr,
7186 unsigned int *line_ptr)
7189 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7190 functionname_ptr, line_ptr,
7191 & elf_tdata (abfd)->dwarf2_find_line_info);
7196 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
7198 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7199 int ret = bed->s->sizeof_ehdr;
7201 if (!info->relocatable)
7203 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
7205 if (phdr_size == (bfd_size_type) -1)
7207 struct elf_segment_map *m;
7210 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
7211 phdr_size += bed->s->sizeof_phdr;
7214 phdr_size = get_program_header_size (abfd, info);
7217 elf_tdata (abfd)->program_header_size = phdr_size;
7225 _bfd_elf_set_section_contents (bfd *abfd,
7227 const void *location,
7229 bfd_size_type count)
7231 Elf_Internal_Shdr *hdr;
7234 if (! abfd->output_has_begun
7235 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7238 hdr = &elf_section_data (section)->this_hdr;
7239 pos = hdr->sh_offset + offset;
7240 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7241 || bfd_bwrite (location, count, abfd) != count)
7248 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7249 arelent *cache_ptr ATTRIBUTE_UNUSED,
7250 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7255 /* Try to convert a non-ELF reloc into an ELF one. */
7258 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7260 /* Check whether we really have an ELF howto. */
7262 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7264 bfd_reloc_code_real_type code;
7265 reloc_howto_type *howto;
7267 /* Alien reloc: Try to determine its type to replace it with an
7268 equivalent ELF reloc. */
7270 if (areloc->howto->pc_relative)
7272 switch (areloc->howto->bitsize)
7275 code = BFD_RELOC_8_PCREL;
7278 code = BFD_RELOC_12_PCREL;
7281 code = BFD_RELOC_16_PCREL;
7284 code = BFD_RELOC_24_PCREL;
7287 code = BFD_RELOC_32_PCREL;
7290 code = BFD_RELOC_64_PCREL;
7296 howto = bfd_reloc_type_lookup (abfd, code);
7298 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7300 if (howto->pcrel_offset)
7301 areloc->addend += areloc->address;
7303 areloc->addend -= areloc->address; /* addend is unsigned!! */
7308 switch (areloc->howto->bitsize)
7314 code = BFD_RELOC_14;
7317 code = BFD_RELOC_16;
7320 code = BFD_RELOC_26;
7323 code = BFD_RELOC_32;
7326 code = BFD_RELOC_64;
7332 howto = bfd_reloc_type_lookup (abfd, code);
7336 areloc->howto = howto;
7344 (*_bfd_error_handler)
7345 (_("%B: unsupported relocation type %s"),
7346 abfd, areloc->howto->name);
7347 bfd_set_error (bfd_error_bad_value);
7352 _bfd_elf_close_and_cleanup (bfd *abfd)
7354 if (bfd_get_format (abfd) == bfd_object)
7356 if (elf_tdata (abfd) != NULL && elf_shstrtab (abfd) != NULL)
7357 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7358 _bfd_dwarf2_cleanup_debug_info (abfd);
7361 return _bfd_generic_close_and_cleanup (abfd);
7364 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7365 in the relocation's offset. Thus we cannot allow any sort of sanity
7366 range-checking to interfere. There is nothing else to do in processing
7369 bfd_reloc_status_type
7370 _bfd_elf_rel_vtable_reloc_fn
7371 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7372 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7373 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7374 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7376 return bfd_reloc_ok;
7379 /* Elf core file support. Much of this only works on native
7380 toolchains, since we rely on knowing the
7381 machine-dependent procfs structure in order to pick
7382 out details about the corefile. */
7384 #ifdef HAVE_SYS_PROCFS_H
7385 # include <sys/procfs.h>
7388 /* FIXME: this is kinda wrong, but it's what gdb wants. */
7391 elfcore_make_pid (bfd *abfd)
7393 return ((elf_tdata (abfd)->core_lwpid << 16)
7394 + (elf_tdata (abfd)->core_pid));
7397 /* If there isn't a section called NAME, make one, using
7398 data from SECT. Note, this function will generate a
7399 reference to NAME, so you shouldn't deallocate or
7403 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7407 if (bfd_get_section_by_name (abfd, name) != NULL)
7410 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
7414 sect2->size = sect->size;
7415 sect2->filepos = sect->filepos;
7416 sect2->alignment_power = sect->alignment_power;
7420 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7421 actually creates up to two pseudosections:
7422 - For the single-threaded case, a section named NAME, unless
7423 such a section already exists.
7424 - For the multi-threaded case, a section named "NAME/PID", where
7425 PID is elfcore_make_pid (abfd).
7426 Both pseudosections have identical contents. */
7428 _bfd_elfcore_make_pseudosection (bfd *abfd,
7434 char *threaded_name;
7438 /* Build the section name. */
7440 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7441 len = strlen (buf) + 1;
7442 threaded_name = bfd_alloc (abfd, len);
7443 if (threaded_name == NULL)
7445 memcpy (threaded_name, buf, len);
7447 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
7452 sect->filepos = filepos;
7453 sect->alignment_power = 2;
7455 return elfcore_maybe_make_sect (abfd, name, sect);
7458 /* prstatus_t exists on:
7460 linux 2.[01] + glibc
7464 #if defined (HAVE_PRSTATUS_T)
7467 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7472 if (note->descsz == sizeof (prstatus_t))
7476 size = sizeof (prstat.pr_reg);
7477 offset = offsetof (prstatus_t, pr_reg);
7478 memcpy (&prstat, note->descdata, sizeof (prstat));
7480 /* Do not overwrite the core signal if it
7481 has already been set by another thread. */
7482 if (elf_tdata (abfd)->core_signal == 0)
7483 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7484 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7486 /* pr_who exists on:
7489 pr_who doesn't exist on:
7492 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7493 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7496 #if defined (HAVE_PRSTATUS32_T)
7497 else if (note->descsz == sizeof (prstatus32_t))
7499 /* 64-bit host, 32-bit corefile */
7500 prstatus32_t prstat;
7502 size = sizeof (prstat.pr_reg);
7503 offset = offsetof (prstatus32_t, pr_reg);
7504 memcpy (&prstat, note->descdata, sizeof (prstat));
7506 /* Do not overwrite the core signal if it
7507 has already been set by another thread. */
7508 if (elf_tdata (abfd)->core_signal == 0)
7509 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7510 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7512 /* pr_who exists on:
7515 pr_who doesn't exist on:
7518 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7519 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7522 #endif /* HAVE_PRSTATUS32_T */
7525 /* Fail - we don't know how to handle any other
7526 note size (ie. data object type). */
7530 /* Make a ".reg/999" section and a ".reg" section. */
7531 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7532 size, note->descpos + offset);
7534 #endif /* defined (HAVE_PRSTATUS_T) */
7536 /* Create a pseudosection containing the exact contents of NOTE. */
7538 elfcore_make_note_pseudosection (bfd *abfd,
7540 Elf_Internal_Note *note)
7542 return _bfd_elfcore_make_pseudosection (abfd, name,
7543 note->descsz, note->descpos);
7546 /* There isn't a consistent prfpregset_t across platforms,
7547 but it doesn't matter, because we don't have to pick this
7548 data structure apart. */
7551 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7553 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7556 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7557 type of NT_PRXFPREG. Just include the whole note's contents
7561 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7563 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7567 elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note)
7569 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note);
7573 elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note)
7575 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note);
7578 #if defined (HAVE_PRPSINFO_T)
7579 typedef prpsinfo_t elfcore_psinfo_t;
7580 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7581 typedef prpsinfo32_t elfcore_psinfo32_t;
7585 #if defined (HAVE_PSINFO_T)
7586 typedef psinfo_t elfcore_psinfo_t;
7587 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7588 typedef psinfo32_t elfcore_psinfo32_t;
7592 /* return a malloc'ed copy of a string at START which is at
7593 most MAX bytes long, possibly without a terminating '\0'.
7594 the copy will always have a terminating '\0'. */
7597 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7600 char *end = memchr (start, '\0', max);
7608 dups = bfd_alloc (abfd, len + 1);
7612 memcpy (dups, start, len);
7618 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7620 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7622 if (note->descsz == sizeof (elfcore_psinfo_t))
7624 elfcore_psinfo_t psinfo;
7626 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7628 elf_tdata (abfd)->core_program
7629 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7630 sizeof (psinfo.pr_fname));
7632 elf_tdata (abfd)->core_command
7633 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7634 sizeof (psinfo.pr_psargs));
7636 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7637 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7639 /* 64-bit host, 32-bit corefile */
7640 elfcore_psinfo32_t psinfo;
7642 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7644 elf_tdata (abfd)->core_program
7645 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7646 sizeof (psinfo.pr_fname));
7648 elf_tdata (abfd)->core_command
7649 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7650 sizeof (psinfo.pr_psargs));
7656 /* Fail - we don't know how to handle any other
7657 note size (ie. data object type). */
7661 /* Note that for some reason, a spurious space is tacked
7662 onto the end of the args in some (at least one anyway)
7663 implementations, so strip it off if it exists. */
7666 char *command = elf_tdata (abfd)->core_command;
7667 int n = strlen (command);
7669 if (0 < n && command[n - 1] == ' ')
7670 command[n - 1] = '\0';
7675 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7677 #if defined (HAVE_PSTATUS_T)
7679 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7681 if (note->descsz == sizeof (pstatus_t)
7682 #if defined (HAVE_PXSTATUS_T)
7683 || note->descsz == sizeof (pxstatus_t)
7689 memcpy (&pstat, note->descdata, sizeof (pstat));
7691 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7693 #if defined (HAVE_PSTATUS32_T)
7694 else if (note->descsz == sizeof (pstatus32_t))
7696 /* 64-bit host, 32-bit corefile */
7699 memcpy (&pstat, note->descdata, sizeof (pstat));
7701 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7704 /* Could grab some more details from the "representative"
7705 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7706 NT_LWPSTATUS note, presumably. */
7710 #endif /* defined (HAVE_PSTATUS_T) */
7712 #if defined (HAVE_LWPSTATUS_T)
7714 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7716 lwpstatus_t lwpstat;
7722 if (note->descsz != sizeof (lwpstat)
7723 #if defined (HAVE_LWPXSTATUS_T)
7724 && note->descsz != sizeof (lwpxstatus_t)
7729 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7731 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7732 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7734 /* Make a ".reg/999" section. */
7736 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7737 len = strlen (buf) + 1;
7738 name = bfd_alloc (abfd, len);
7741 memcpy (name, buf, len);
7743 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7747 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7748 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7749 sect->filepos = note->descpos
7750 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7753 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7754 sect->size = sizeof (lwpstat.pr_reg);
7755 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7758 sect->alignment_power = 2;
7760 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7763 /* Make a ".reg2/999" section */
7765 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7766 len = strlen (buf) + 1;
7767 name = bfd_alloc (abfd, len);
7770 memcpy (name, buf, len);
7772 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7776 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7777 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7778 sect->filepos = note->descpos
7779 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7782 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7783 sect->size = sizeof (lwpstat.pr_fpreg);
7784 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7787 sect->alignment_power = 2;
7789 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7791 #endif /* defined (HAVE_LWPSTATUS_T) */
7794 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7801 int is_active_thread;
7804 if (note->descsz < 728)
7807 if (! CONST_STRNEQ (note->namedata, "win32"))
7810 type = bfd_get_32 (abfd, note->descdata);
7814 case 1 /* NOTE_INFO_PROCESS */:
7815 /* FIXME: need to add ->core_command. */
7816 /* process_info.pid */
7817 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 8);
7818 /* process_info.signal */
7819 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 12);
7822 case 2 /* NOTE_INFO_THREAD */:
7823 /* Make a ".reg/999" section. */
7824 /* thread_info.tid */
7825 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
7827 len = strlen (buf) + 1;
7828 name = bfd_alloc (abfd, len);
7832 memcpy (name, buf, len);
7834 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7838 /* sizeof (thread_info.thread_context) */
7840 /* offsetof (thread_info.thread_context) */
7841 sect->filepos = note->descpos + 12;
7842 sect->alignment_power = 2;
7844 /* thread_info.is_active_thread */
7845 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
7847 if (is_active_thread)
7848 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7852 case 3 /* NOTE_INFO_MODULE */:
7853 /* Make a ".module/xxxxxxxx" section. */
7854 /* module_info.base_address */
7855 base_addr = bfd_get_32 (abfd, note->descdata + 4);
7856 sprintf (buf, ".module/%08lx", (unsigned long) base_addr);
7858 len = strlen (buf) + 1;
7859 name = bfd_alloc (abfd, len);
7863 memcpy (name, buf, len);
7865 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7870 sect->size = note->descsz;
7871 sect->filepos = note->descpos;
7872 sect->alignment_power = 2;
7883 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7885 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7893 if (bed->elf_backend_grok_prstatus)
7894 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7896 #if defined (HAVE_PRSTATUS_T)
7897 return elfcore_grok_prstatus (abfd, note);
7902 #if defined (HAVE_PSTATUS_T)
7904 return elfcore_grok_pstatus (abfd, note);
7907 #if defined (HAVE_LWPSTATUS_T)
7909 return elfcore_grok_lwpstatus (abfd, note);
7912 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7913 return elfcore_grok_prfpreg (abfd, note);
7915 case NT_WIN32PSTATUS:
7916 return elfcore_grok_win32pstatus (abfd, note);
7918 case NT_PRXFPREG: /* Linux SSE extension */
7919 if (note->namesz == 6
7920 && strcmp (note->namedata, "LINUX") == 0)
7921 return elfcore_grok_prxfpreg (abfd, note);
7926 if (note->namesz == 6
7927 && strcmp (note->namedata, "LINUX") == 0)
7928 return elfcore_grok_ppc_vmx (abfd, note);
7933 if (note->namesz == 6
7934 && strcmp (note->namedata, "LINUX") == 0)
7935 return elfcore_grok_ppc_vsx (abfd, note);
7941 if (bed->elf_backend_grok_psinfo)
7942 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7944 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7945 return elfcore_grok_psinfo (abfd, note);
7952 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
7957 sect->size = note->descsz;
7958 sect->filepos = note->descpos;
7959 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7967 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
7969 elf_tdata (abfd)->build_id_size = note->descsz;
7970 elf_tdata (abfd)->build_id = bfd_alloc (abfd, note->descsz);
7971 if (elf_tdata (abfd)->build_id == NULL)
7974 memcpy (elf_tdata (abfd)->build_id, note->descdata, note->descsz);
7980 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
7987 case NT_GNU_BUILD_ID:
7988 return elfobj_grok_gnu_build_id (abfd, note);
7993 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
7997 cp = strchr (note->namedata, '@');
8000 *lwpidp = atoi(cp + 1);
8007 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8009 /* Signal number at offset 0x08. */
8010 elf_tdata (abfd)->core_signal
8011 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8013 /* Process ID at offset 0x50. */
8014 elf_tdata (abfd)->core_pid
8015 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
8017 /* Command name at 0x7c (max 32 bytes, including nul). */
8018 elf_tdata (abfd)->core_command
8019 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
8021 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
8026 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
8030 if (elfcore_netbsd_get_lwpid (note, &lwp))
8031 elf_tdata (abfd)->core_lwpid = lwp;
8033 if (note->type == NT_NETBSDCORE_PROCINFO)
8035 /* NetBSD-specific core "procinfo". Note that we expect to
8036 find this note before any of the others, which is fine,
8037 since the kernel writes this note out first when it
8038 creates a core file. */
8040 return elfcore_grok_netbsd_procinfo (abfd, note);
8043 /* As of Jan 2002 there are no other machine-independent notes
8044 defined for NetBSD core files. If the note type is less
8045 than the start of the machine-dependent note types, we don't
8048 if (note->type < NT_NETBSDCORE_FIRSTMACH)
8052 switch (bfd_get_arch (abfd))
8054 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
8055 PT_GETFPREGS == mach+2. */
8057 case bfd_arch_alpha:
8058 case bfd_arch_sparc:
8061 case NT_NETBSDCORE_FIRSTMACH+0:
8062 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8064 case NT_NETBSDCORE_FIRSTMACH+2:
8065 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8071 /* On all other arch's, PT_GETREGS == mach+1 and
8072 PT_GETFPREGS == mach+3. */
8077 case NT_NETBSDCORE_FIRSTMACH+1:
8078 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8080 case NT_NETBSDCORE_FIRSTMACH+3:
8081 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8091 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
8093 void *ddata = note->descdata;
8100 /* nto_procfs_status 'pid' field is at offset 0. */
8101 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
8103 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
8104 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
8106 /* nto_procfs_status 'flags' field is at offset 8. */
8107 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
8109 /* nto_procfs_status 'what' field is at offset 14. */
8110 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
8112 elf_tdata (abfd)->core_signal = sig;
8113 elf_tdata (abfd)->core_lwpid = *tid;
8116 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
8117 do not come from signals so we make sure we set the current
8118 thread just in case. */
8119 if (flags & 0x00000080)
8120 elf_tdata (abfd)->core_lwpid = *tid;
8122 /* Make a ".qnx_core_status/%d" section. */
8123 sprintf (buf, ".qnx_core_status/%ld", *tid);
8125 name = bfd_alloc (abfd, strlen (buf) + 1);
8130 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8134 sect->size = note->descsz;
8135 sect->filepos = note->descpos;
8136 sect->alignment_power = 2;
8138 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
8142 elfcore_grok_nto_regs (bfd *abfd,
8143 Elf_Internal_Note *note,
8151 /* Make a "(base)/%d" section. */
8152 sprintf (buf, "%s/%ld", base, tid);
8154 name = bfd_alloc (abfd, strlen (buf) + 1);
8159 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8163 sect->size = note->descsz;
8164 sect->filepos = note->descpos;
8165 sect->alignment_power = 2;
8167 /* This is the current thread. */
8168 if (elf_tdata (abfd)->core_lwpid == tid)
8169 return elfcore_maybe_make_sect (abfd, base, sect);
8174 #define BFD_QNT_CORE_INFO 7
8175 #define BFD_QNT_CORE_STATUS 8
8176 #define BFD_QNT_CORE_GREG 9
8177 #define BFD_QNT_CORE_FPREG 10
8180 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
8182 /* Every GREG section has a STATUS section before it. Store the
8183 tid from the previous call to pass down to the next gregs
8185 static long tid = 1;
8189 case BFD_QNT_CORE_INFO:
8190 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
8191 case BFD_QNT_CORE_STATUS:
8192 return elfcore_grok_nto_status (abfd, note, &tid);
8193 case BFD_QNT_CORE_GREG:
8194 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
8195 case BFD_QNT_CORE_FPREG:
8196 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
8203 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
8209 /* Use note name as section name. */
8211 name = bfd_alloc (abfd, len);
8214 memcpy (name, note->namedata, len);
8215 name[len - 1] = '\0';
8217 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8221 sect->size = note->descsz;
8222 sect->filepos = note->descpos;
8223 sect->alignment_power = 1;
8228 /* Function: elfcore_write_note
8231 buffer to hold note, and current size of buffer
8235 size of data for note
8237 Writes note to end of buffer. ELF64 notes are written exactly as
8238 for ELF32, despite the current (as of 2006) ELF gabi specifying
8239 that they ought to have 8-byte namesz and descsz field, and have
8240 8-byte alignment. Other writers, eg. Linux kernel, do the same.
8243 Pointer to realloc'd buffer, *BUFSIZ updated. */
8246 elfcore_write_note (bfd *abfd,
8254 Elf_External_Note *xnp;
8261 namesz = strlen (name) + 1;
8263 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
8265 buf = realloc (buf, *bufsiz + newspace);
8268 dest = buf + *bufsiz;
8269 *bufsiz += newspace;
8270 xnp = (Elf_External_Note *) dest;
8271 H_PUT_32 (abfd, namesz, xnp->namesz);
8272 H_PUT_32 (abfd, size, xnp->descsz);
8273 H_PUT_32 (abfd, type, xnp->type);
8277 memcpy (dest, name, namesz);
8285 memcpy (dest, input, size);
8295 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8297 elfcore_write_prpsinfo (bfd *abfd,
8303 const char *note_name = "CORE";
8304 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8306 if (bed->elf_backend_write_core_note != NULL)
8309 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8310 NT_PRPSINFO, fname, psargs);
8315 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8316 if (bed->s->elfclass == ELFCLASS32)
8318 #if defined (HAVE_PSINFO32_T)
8320 int note_type = NT_PSINFO;
8323 int note_type = NT_PRPSINFO;
8326 memset (&data, 0, sizeof (data));
8327 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8328 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8329 return elfcore_write_note (abfd, buf, bufsiz,
8330 note_name, note_type, &data, sizeof (data));
8335 #if defined (HAVE_PSINFO_T)
8337 int note_type = NT_PSINFO;
8340 int note_type = NT_PRPSINFO;
8343 memset (&data, 0, sizeof (data));
8344 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8345 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8346 return elfcore_write_note (abfd, buf, bufsiz,
8347 note_name, note_type, &data, sizeof (data));
8350 #endif /* PSINFO_T or PRPSINFO_T */
8352 #if defined (HAVE_PRSTATUS_T)
8354 elfcore_write_prstatus (bfd *abfd,
8361 const char *note_name = "CORE";
8362 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8364 if (bed->elf_backend_write_core_note != NULL)
8367 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8369 pid, cursig, gregs);
8374 #if defined (HAVE_PRSTATUS32_T)
8375 if (bed->s->elfclass == ELFCLASS32)
8377 prstatus32_t prstat;
8379 memset (&prstat, 0, sizeof (prstat));
8380 prstat.pr_pid = pid;
8381 prstat.pr_cursig = cursig;
8382 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8383 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8384 NT_PRSTATUS, &prstat, sizeof (prstat));
8391 memset (&prstat, 0, sizeof (prstat));
8392 prstat.pr_pid = pid;
8393 prstat.pr_cursig = cursig;
8394 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8395 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8396 NT_PRSTATUS, &prstat, sizeof (prstat));
8399 #endif /* HAVE_PRSTATUS_T */
8401 #if defined (HAVE_LWPSTATUS_T)
8403 elfcore_write_lwpstatus (bfd *abfd,
8410 lwpstatus_t lwpstat;
8411 const char *note_name = "CORE";
8413 memset (&lwpstat, 0, sizeof (lwpstat));
8414 lwpstat.pr_lwpid = pid >> 16;
8415 lwpstat.pr_cursig = cursig;
8416 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8417 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
8418 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8420 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
8421 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
8423 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
8424 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
8427 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8428 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
8430 #endif /* HAVE_LWPSTATUS_T */
8432 #if defined (HAVE_PSTATUS_T)
8434 elfcore_write_pstatus (bfd *abfd,
8438 int cursig ATTRIBUTE_UNUSED,
8439 const void *gregs ATTRIBUTE_UNUSED)
8441 const char *note_name = "CORE";
8442 #if defined (HAVE_PSTATUS32_T)
8443 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8445 if (bed->s->elfclass == ELFCLASS32)
8449 memset (&pstat, 0, sizeof (pstat));
8450 pstat.pr_pid = pid & 0xffff;
8451 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8452 NT_PSTATUS, &pstat, sizeof (pstat));
8460 memset (&pstat, 0, sizeof (pstat));
8461 pstat.pr_pid = pid & 0xffff;
8462 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8463 NT_PSTATUS, &pstat, sizeof (pstat));
8467 #endif /* HAVE_PSTATUS_T */
8470 elfcore_write_prfpreg (bfd *abfd,
8476 const char *note_name = "CORE";
8477 return elfcore_write_note (abfd, buf, bufsiz,
8478 note_name, NT_FPREGSET, fpregs, size);
8482 elfcore_write_prxfpreg (bfd *abfd,
8485 const void *xfpregs,
8488 char *note_name = "LINUX";
8489 return elfcore_write_note (abfd, buf, bufsiz,
8490 note_name, NT_PRXFPREG, xfpregs, size);
8494 elfcore_write_ppc_vmx (bfd *abfd,
8497 const void *ppc_vmx,
8500 char *note_name = "LINUX";
8501 return elfcore_write_note (abfd, buf, bufsiz,
8502 note_name, NT_PPC_VMX, ppc_vmx, size);
8506 elfcore_write_ppc_vsx (bfd *abfd,
8509 const void *ppc_vsx,
8512 char *note_name = "LINUX";
8513 return elfcore_write_note (abfd, buf, bufsiz,
8514 note_name, NT_PPC_VSX, ppc_vsx, size);
8518 elfcore_write_register_note (bfd *abfd,
8521 const char *section,
8525 if (strcmp (section, ".reg2") == 0)
8526 return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size);
8527 if (strcmp (section, ".reg-xfp") == 0)
8528 return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
8529 if (strcmp (section, ".reg-ppc-vmx") == 0)
8530 return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
8531 if (strcmp (section, ".reg-ppc-vsx") == 0)
8532 return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size);
8537 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
8542 while (p < buf + size)
8544 /* FIXME: bad alignment assumption. */
8545 Elf_External_Note *xnp = (Elf_External_Note *) p;
8546 Elf_Internal_Note in;
8548 if (offsetof (Elf_External_Note, name) > buf - p + size)
8551 in.type = H_GET_32 (abfd, xnp->type);
8553 in.namesz = H_GET_32 (abfd, xnp->namesz);
8554 in.namedata = xnp->name;
8555 if (in.namesz > buf - in.namedata + size)
8558 in.descsz = H_GET_32 (abfd, xnp->descsz);
8559 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
8560 in.descpos = offset + (in.descdata - buf);
8562 && (in.descdata >= buf + size
8563 || in.descsz > buf - in.descdata + size))
8566 switch (bfd_get_format (abfd))
8572 if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
8574 if (! elfcore_grok_netbsd_note (abfd, &in))
8577 else if (CONST_STRNEQ (in.namedata, "QNX"))
8579 if (! elfcore_grok_nto_note (abfd, &in))
8582 else if (CONST_STRNEQ (in.namedata, "SPU/"))
8584 if (! elfcore_grok_spu_note (abfd, &in))
8589 if (! elfcore_grok_note (abfd, &in))
8595 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
8597 if (! elfobj_grok_gnu_note (abfd, &in))
8603 p = in.descdata + BFD_ALIGN (in.descsz, 4);
8610 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
8617 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
8620 buf = bfd_malloc (size);
8624 if (bfd_bread (buf, size, abfd) != size
8625 || !elf_parse_notes (abfd, buf, size, offset))
8635 /* Providing external access to the ELF program header table. */
8637 /* Return an upper bound on the number of bytes required to store a
8638 copy of ABFD's program header table entries. Return -1 if an error
8639 occurs; bfd_get_error will return an appropriate code. */
8642 bfd_get_elf_phdr_upper_bound (bfd *abfd)
8644 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8646 bfd_set_error (bfd_error_wrong_format);
8650 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
8653 /* Copy ABFD's program header table entries to *PHDRS. The entries
8654 will be stored as an array of Elf_Internal_Phdr structures, as
8655 defined in include/elf/internal.h. To find out how large the
8656 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8658 Return the number of program header table entries read, or -1 if an
8659 error occurs; bfd_get_error will return an appropriate code. */
8662 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
8666 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8668 bfd_set_error (bfd_error_wrong_format);
8672 num_phdrs = elf_elfheader (abfd)->e_phnum;
8673 memcpy (phdrs, elf_tdata (abfd)->phdr,
8674 num_phdrs * sizeof (Elf_Internal_Phdr));
8679 enum elf_reloc_type_class
8680 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
8682 return reloc_class_normal;
8685 /* For RELA architectures, return the relocation value for a
8686 relocation against a local symbol. */
8689 _bfd_elf_rela_local_sym (bfd *abfd,
8690 Elf_Internal_Sym *sym,
8692 Elf_Internal_Rela *rel)
8694 asection *sec = *psec;
8697 relocation = (sec->output_section->vma
8698 + sec->output_offset
8700 if ((sec->flags & SEC_MERGE)
8701 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
8702 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
8705 _bfd_merged_section_offset (abfd, psec,
8706 elf_section_data (sec)->sec_info,
8707 sym->st_value + rel->r_addend);
8710 /* If we have changed the section, and our original section is
8711 marked with SEC_EXCLUDE, it means that the original
8712 SEC_MERGE section has been completely subsumed in some
8713 other SEC_MERGE section. In this case, we need to leave
8714 some info around for --emit-relocs. */
8715 if ((sec->flags & SEC_EXCLUDE) != 0)
8716 sec->kept_section = *psec;
8719 rel->r_addend -= relocation;
8720 rel->r_addend += sec->output_section->vma + sec->output_offset;
8726 _bfd_elf_rel_local_sym (bfd *abfd,
8727 Elf_Internal_Sym *sym,
8731 asection *sec = *psec;
8733 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
8734 return sym->st_value + addend;
8736 return _bfd_merged_section_offset (abfd, psec,
8737 elf_section_data (sec)->sec_info,
8738 sym->st_value + addend);
8742 _bfd_elf_section_offset (bfd *abfd,
8743 struct bfd_link_info *info,
8747 switch (sec->sec_info_type)
8749 case ELF_INFO_TYPE_STABS:
8750 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
8752 case ELF_INFO_TYPE_EH_FRAME:
8753 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
8759 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8760 reconstruct an ELF file by reading the segments out of remote memory
8761 based on the ELF file header at EHDR_VMA and the ELF program headers it
8762 points to. If not null, *LOADBASEP is filled in with the difference
8763 between the VMAs from which the segments were read, and the VMAs the
8764 file headers (and hence BFD's idea of each section's VMA) put them at.
8766 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8767 remote memory at target address VMA into the local buffer at MYADDR; it
8768 should return zero on success or an `errno' code on failure. TEMPL must
8769 be a BFD for an ELF target with the word size and byte order found in
8770 the remote memory. */
8773 bfd_elf_bfd_from_remote_memory
8777 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
8779 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
8780 (templ, ehdr_vma, loadbasep, target_read_memory);
8784 _bfd_elf_get_synthetic_symtab (bfd *abfd,
8785 long symcount ATTRIBUTE_UNUSED,
8786 asymbol **syms ATTRIBUTE_UNUSED,
8791 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8794 const char *relplt_name;
8795 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8799 Elf_Internal_Shdr *hdr;
8805 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
8808 if (dynsymcount <= 0)
8811 if (!bed->plt_sym_val)
8814 relplt_name = bed->relplt_name;
8815 if (relplt_name == NULL)
8816 relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt";
8817 relplt = bfd_get_section_by_name (abfd, relplt_name);
8821 hdr = &elf_section_data (relplt)->this_hdr;
8822 if (hdr->sh_link != elf_dynsymtab (abfd)
8823 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
8826 plt = bfd_get_section_by_name (abfd, ".plt");
8830 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8831 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
8834 count = relplt->size / hdr->sh_entsize;
8835 size = count * sizeof (asymbol);
8836 p = relplt->relocation;
8837 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
8838 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
8840 s = *ret = bfd_malloc (size);
8844 names = (char *) (s + count);
8845 p = relplt->relocation;
8847 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
8852 addr = bed->plt_sym_val (i, plt, p);
8853 if (addr == (bfd_vma) -1)
8856 *s = **p->sym_ptr_ptr;
8857 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8858 we are defining a symbol, ensure one of them is set. */
8859 if ((s->flags & BSF_LOCAL) == 0)
8860 s->flags |= BSF_GLOBAL;
8861 s->flags |= BSF_SYNTHETIC;
8863 s->value = addr - plt->vma;
8866 len = strlen ((*p->sym_ptr_ptr)->name);
8867 memcpy (names, (*p->sym_ptr_ptr)->name, len);
8869 memcpy (names, "@plt", sizeof ("@plt"));
8870 names += sizeof ("@plt");
8877 /* It is only used by x86-64 so far. */
8878 asection _bfd_elf_large_com_section
8879 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
8880 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
8883 _bfd_elf_set_osabi (bfd * abfd,
8884 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
8886 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
8888 i_ehdrp = elf_elfheader (abfd);
8890 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
8894 /* Return TRUE for ELF symbol types that represent functions.
8895 This is the default version of this function, which is sufficient for
8896 most targets. It returns true if TYPE is STT_FUNC. */
8899 _bfd_elf_is_function_type (unsigned int type)
8901 return (type == STT_FUNC);